| /* Everything about breakpoints, for GDB. |
| |
| Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, |
| 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software |
| Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include <ctype.h> |
| #include "symtab.h" |
| #include "frame.h" |
| #include "breakpoint.h" |
| #include "gdbtypes.h" |
| #include "expression.h" |
| #include "gdbcore.h" |
| #include "gdbcmd.h" |
| #include "value.h" |
| #include "command.h" |
| #include "inferior.h" |
| #include "gdbthread.h" |
| #include "target.h" |
| #include "language.h" |
| #include "gdb_string.h" |
| #include "demangle.h" |
| #include "annotate.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "source.h" |
| #include "linespec.h" |
| #include "completer.h" |
| #include "gdb.h" |
| #include "ui-out.h" |
| #include "cli/cli-script.h" |
| #include "gdb_assert.h" |
| #include "block.h" |
| |
| #include "gdb-events.h" |
| |
| /* Prototypes for local functions. */ |
| |
| static void until_break_command_continuation (struct continuation_arg *arg); |
| |
| static void catch_command_1 (char *, int, int); |
| |
| static void enable_delete_command (char *, int); |
| |
| static void enable_delete_breakpoint (struct breakpoint *); |
| |
| static void enable_once_command (char *, int); |
| |
| static void enable_once_breakpoint (struct breakpoint *); |
| |
| static void disable_command (char *, int); |
| |
| static void enable_command (char *, int); |
| |
| static void map_breakpoint_numbers (char *, void (*)(struct breakpoint *)); |
| |
| static void ignore_command (char *, int); |
| |
| static int breakpoint_re_set_one (void *); |
| |
| static void clear_command (char *, int); |
| |
| static void catch_command (char *, int); |
| |
| static void handle_gnu_4_16_catch_command (char *, int, int); |
| |
| static struct symtabs_and_lines get_catch_sals (int); |
| |
| static void watch_command (char *, int); |
| |
| static int can_use_hardware_watchpoint (struct value *); |
| |
| extern void break_at_finish_command (char *, int); |
| extern void break_at_finish_at_depth_command (char *, int); |
| |
| extern void tbreak_at_finish_command (char *, int); |
| |
| static void break_command_1 (char *, int, int); |
| |
| static void mention (struct breakpoint *); |
| |
| struct breakpoint *set_raw_breakpoint (struct symtab_and_line, enum bptype); |
| |
| static void check_duplicates (struct breakpoint *); |
| |
| static void describe_other_breakpoints (CORE_ADDR, asection *); |
| |
| static void breakpoints_info (char *, int); |
| |
| static void breakpoint_1 (int, int); |
| |
| static bpstat bpstat_alloc (struct breakpoint *, bpstat); |
| |
| static int breakpoint_cond_eval (void *); |
| |
| static void cleanup_executing_breakpoints (void *); |
| |
| static void commands_command (char *, int); |
| |
| static void condition_command (char *, int); |
| |
| static int get_number_trailer (char **, int); |
| |
| void set_breakpoint_count (int); |
| |
| typedef enum |
| { |
| mark_inserted, |
| mark_uninserted |
| } |
| insertion_state_t; |
| |
| static int remove_breakpoint (struct breakpoint *, insertion_state_t); |
| |
| static enum print_stop_action print_it_typical (bpstat); |
| |
| static enum print_stop_action print_bp_stop_message (bpstat bs); |
| |
| typedef struct |
| { |
| enum exception_event_kind kind; |
| int enable_p; |
| } |
| args_for_catchpoint_enable; |
| |
| static int watchpoint_check (void *); |
| |
| static int cover_target_enable_exception_callback (void *); |
| |
| static void maintenance_info_breakpoints (char *, int); |
| |
| static void create_longjmp_breakpoint (char *); |
| |
| static void create_overlay_event_breakpoint (char *); |
| |
| static int hw_breakpoint_used_count (void); |
| |
| static int hw_watchpoint_used_count (enum bptype, int *); |
| |
| static void hbreak_command (char *, int); |
| |
| static void thbreak_command (char *, int); |
| |
| static void watch_command_1 (char *, int, int); |
| |
| static void rwatch_command (char *, int); |
| |
| static void awatch_command (char *, int); |
| |
| static void do_enable_breakpoint (struct breakpoint *, enum bpdisp); |
| |
| static void solib_load_unload_1 (char *hookname, |
| int tempflag, |
| char *dll_pathname, |
| char *cond_string, enum bptype bp_kind); |
| |
| static void create_fork_vfork_event_catchpoint (int tempflag, |
| char *cond_string, |
| enum bptype bp_kind); |
| |
| static void break_at_finish_at_depth_command_1 (char *arg, |
| int flag, int from_tty); |
| |
| static void break_at_finish_command_1 (char *arg, int flag, int from_tty); |
| |
| static void stop_command (char *arg, int from_tty); |
| |
| static void stopin_command (char *arg, int from_tty); |
| |
| static void stopat_command (char *arg, int from_tty); |
| |
| static char *ep_find_event_name_end (char *arg); |
| |
| static char *ep_parse_optional_if_clause (char **arg); |
| |
| static char *ep_parse_optional_filename (char **arg); |
| |
| #if defined(CHILD_INSERT_EXEC_CATCHPOINT) |
| static void catch_exec_command_1 (char *arg, int tempflag, int from_tty); |
| #endif |
| |
| static void create_exception_catchpoint (int tempflag, char *cond_string, |
| enum exception_event_kind ex_event, |
| struct symtab_and_line *sal); |
| |
| static void catch_exception_command_1 (enum exception_event_kind ex_event, |
| char *arg, int tempflag, int from_tty); |
| |
| static void tcatch_command (char *arg, int from_tty); |
| |
| static void ep_skip_leading_whitespace (char **s); |
| |
| /* Prototypes for exported functions. */ |
| |
| /* If FALSE, gdb will not use hardware support for watchpoints, even |
| if such is available. */ |
| static int can_use_hw_watchpoints; |
| |
| void _initialize_breakpoint (void); |
| |
| extern int addressprint; /* Print machine addresses? */ |
| |
| /* Are we executing breakpoint commands? */ |
| static int executing_breakpoint_commands; |
| |
| /* Are overlay event breakpoints enabled? */ |
| static int overlay_events_enabled; |
| |
| /* Walk the following statement or block through all breakpoints. |
| ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current |
| breakpoint. */ |
| |
| #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next) |
| |
| #define ALL_BREAKPOINTS_SAFE(B,TMP) \ |
| for (B = breakpoint_chain; \ |
| B ? (TMP=B->next, 1): 0; \ |
| B = TMP) |
| |
| /* True if SHIFT_INST_REGS defined, false otherwise. */ |
| |
| int must_shift_inst_regs = |
| #if defined(SHIFT_INST_REGS) |
| 1 |
| #else |
| 0 |
| #endif |
| ; |
| |
| /* True if breakpoint hit counts should be displayed in breakpoint info. */ |
| |
| int show_breakpoint_hit_counts = 1; |
| |
| /* Chain of all breakpoints defined. */ |
| |
| struct breakpoint *breakpoint_chain; |
| |
| /* Number of last breakpoint made. */ |
| |
| int breakpoint_count; |
| |
| /* Pointer to current exception event record */ |
| static struct exception_event_record *current_exception_event; |
| |
| /* Indicator of whether exception catchpoints should be nuked |
| between runs of a program */ |
| int exception_catchpoints_are_fragile = 0; |
| |
| /* Indicator of when exception catchpoints set-up should be |
| reinitialized -- e.g. when program is re-run */ |
| int exception_support_initialized = 0; |
| |
| /* This function returns a pointer to the string representation of the |
| pathname of the dynamically-linked library that has just been |
| loaded. |
| |
| This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE, |
| or undefined results are guaranteed. |
| |
| This string's contents are only valid immediately after the |
| inferior has stopped in the dynamic linker hook, and becomes |
| invalid as soon as the inferior is continued. Clients should make |
| a copy of this string if they wish to continue the inferior and |
| then access the string. */ |
| |
| #ifndef SOLIB_LOADED_LIBRARY_PATHNAME |
| #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) "" |
| #endif |
| |
| /* This function returns a pointer to the string representation of the |
| pathname of the dynamically-linked library that has just been |
| unloaded. |
| |
| This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is |
| TRUE, or undefined results are guaranteed. |
| |
| This string's contents are only valid immediately after the |
| inferior has stopped in the dynamic linker hook, and becomes |
| invalid as soon as the inferior is continued. Clients should make |
| a copy of this string if they wish to continue the inferior and |
| then access the string. */ |
| |
| #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME |
| #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) "" |
| #endif |
| |
| /* This function is called by the "catch load" command. It allows the |
| debugger to be notified by the dynamic linker when a specified |
| library file (or any library file, if filename is NULL) is loaded. */ |
| |
| #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK |
| #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \ |
| error ("catch of library loads not yet implemented on this platform") |
| #endif |
| |
| /* This function is called by the "catch unload" command. It allows |
| the debugger to be notified by the dynamic linker when a specified |
| library file (or any library file, if filename is NULL) is |
| unloaded. */ |
| |
| #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK |
| #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \ |
| error ("catch of library unloads not yet implemented on this platform") |
| #endif |
| |
| /* Set breakpoint count to NUM. */ |
| |
| void |
| set_breakpoint_count (int num) |
| { |
| breakpoint_count = num; |
| set_internalvar (lookup_internalvar ("bpnum"), |
| value_from_longest (builtin_type_int, (LONGEST) num)); |
| } |
| |
| /* Used in run_command to zero the hit count when a new run starts. */ |
| |
| void |
| clear_breakpoint_hit_counts (void) |
| { |
| struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| b->hit_count = 0; |
| } |
| |
| /* Default address, symtab and line to put a breakpoint at |
| for "break" command with no arg. |
| if default_breakpoint_valid is zero, the other three are |
| not valid, and "break" with no arg is an error. |
| |
| This set by print_stack_frame, which calls set_default_breakpoint. */ |
| |
| int default_breakpoint_valid; |
| CORE_ADDR default_breakpoint_address; |
| struct symtab *default_breakpoint_symtab; |
| int default_breakpoint_line; |
| |
| /* *PP is a string denoting a breakpoint. Get the number of the breakpoint. |
| Advance *PP after the string and any trailing whitespace. |
| |
| Currently the string can either be a number or "$" followed by the name |
| of a convenience variable. Making it an expression wouldn't work well |
| for map_breakpoint_numbers (e.g. "4 + 5 + 6"). |
| |
| TRAILER is a character which can be found after the number; most |
| commonly this is `-'. If you don't want a trailer, use \0. */ |
| static int |
| get_number_trailer (char **pp, int trailer) |
| { |
| int retval = 0; /* default */ |
| char *p = *pp; |
| |
| if (p == NULL) |
| /* Empty line means refer to the last breakpoint. */ |
| return breakpoint_count; |
| else if (*p == '$') |
| { |
| /* Make a copy of the name, so we can null-terminate it |
| to pass to lookup_internalvar(). */ |
| char *varname; |
| char *start = ++p; |
| struct value *val; |
| |
| while (isalnum (*p) || *p == '_') |
| p++; |
| varname = (char *) alloca (p - start + 1); |
| strncpy (varname, start, p - start); |
| varname[p - start] = '\0'; |
| val = value_of_internalvar (lookup_internalvar (varname)); |
| if (TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_INT) |
| retval = (int) value_as_long (val); |
| else |
| { |
| printf_filtered ("Convenience variable must have integer value.\n"); |
| retval = 0; |
| } |
| } |
| else |
| { |
| if (*p == '-') |
| ++p; |
| while (*p >= '0' && *p <= '9') |
| ++p; |
| if (p == *pp) |
| /* There is no number here. (e.g. "cond a == b"). */ |
| { |
| /* Skip non-numeric token */ |
| while (*p && !isspace((int) *p)) |
| ++p; |
| /* Return zero, which caller must interpret as error. */ |
| retval = 0; |
| } |
| else |
| retval = atoi (*pp); |
| } |
| if (!(isspace (*p) || *p == '\0' || *p == trailer)) |
| { |
| /* Trailing junk: return 0 and let caller print error msg. */ |
| while (!(isspace (*p) || *p == '\0' || *p == trailer)) |
| ++p; |
| retval = 0; |
| } |
| while (isspace (*p)) |
| p++; |
| *pp = p; |
| return retval; |
| } |
| |
| |
| /* Like get_number_trailer, but don't allow a trailer. */ |
| int |
| get_number (char **pp) |
| { |
| return get_number_trailer (pp, '\0'); |
| } |
| |
| /* Parse a number or a range. |
| * A number will be of the form handled by get_number. |
| * A range will be of the form <number1> - <number2>, and |
| * will represent all the integers between number1 and number2, |
| * inclusive. |
| * |
| * While processing a range, this fuction is called iteratively; |
| * At each call it will return the next value in the range. |
| * |
| * At the beginning of parsing a range, the char pointer PP will |
| * be advanced past <number1> and left pointing at the '-' token. |
| * Subsequent calls will not advance the pointer until the range |
| * is completed. The call that completes the range will advance |
| * pointer PP past <number2>. |
| */ |
| |
| int |
| get_number_or_range (char **pp) |
| { |
| static int last_retval, end_value; |
| static char *end_ptr; |
| static int in_range = 0; |
| |
| if (**pp != '-') |
| { |
| /* Default case: pp is pointing either to a solo number, |
| or to the first number of a range. */ |
| last_retval = get_number_trailer (pp, '-'); |
| if (**pp == '-') |
| { |
| char **temp; |
| |
| /* This is the start of a range (<number1> - <number2>). |
| Skip the '-', parse and remember the second number, |
| and also remember the end of the final token. */ |
| |
| temp = &end_ptr; |
| end_ptr = *pp + 1; |
| while (isspace ((int) *end_ptr)) |
| end_ptr++; /* skip white space */ |
| end_value = get_number (temp); |
| if (end_value < last_retval) |
| { |
| error ("inverted range"); |
| } |
| else if (end_value == last_retval) |
| { |
| /* degenerate range (number1 == number2). Advance the |
| token pointer so that the range will be treated as a |
| single number. */ |
| *pp = end_ptr; |
| } |
| else |
| in_range = 1; |
| } |
| } |
| else if (! in_range) |
| error ("negative value"); |
| else |
| { |
| /* pp points to the '-' that betokens a range. All |
| number-parsing has already been done. Return the next |
| integer value (one greater than the saved previous value). |
| Do not advance the token pointer 'pp' until the end of range |
| is reached. */ |
| |
| if (++last_retval == end_value) |
| { |
| /* End of range reached; advance token pointer. */ |
| *pp = end_ptr; |
| in_range = 0; |
| } |
| } |
| return last_retval; |
| } |
| |
| |
| |
| /* condition N EXP -- set break condition of breakpoint N to EXP. */ |
| |
| static void |
| condition_command (char *arg, int from_tty) |
| { |
| register struct breakpoint *b; |
| char *p; |
| register int bnum; |
| |
| if (arg == 0) |
| error_no_arg ("breakpoint number"); |
| |
| p = arg; |
| bnum = get_number (&p); |
| if (bnum == 0) |
| error ("Bad breakpoint argument: '%s'", arg); |
| |
| ALL_BREAKPOINTS (b) |
| if (b->number == bnum) |
| { |
| if (b->cond) |
| { |
| xfree (b->cond); |
| b->cond = 0; |
| } |
| if (b->cond_string != NULL) |
| xfree (b->cond_string); |
| |
| if (*p == 0) |
| { |
| b->cond = 0; |
| b->cond_string = NULL; |
| if (from_tty) |
| printf_filtered ("Breakpoint %d now unconditional.\n", bnum); |
| } |
| else |
| { |
| arg = p; |
| /* I don't know if it matters whether this is the string the user |
| typed in or the decompiled expression. */ |
| b->cond_string = savestring (arg, strlen (arg)); |
| b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0); |
| if (*arg) |
| error ("Junk at end of expression"); |
| } |
| breakpoints_changed (); |
| breakpoint_modify_event (b->number); |
| return; |
| } |
| |
| error ("No breakpoint number %d.", bnum); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| commands_command (char *arg, int from_tty) |
| { |
| register struct breakpoint *b; |
| char *p; |
| register int bnum; |
| struct command_line *l; |
| |
| /* If we allowed this, we would have problems with when to |
| free the storage, if we change the commands currently |
| being read from. */ |
| |
| if (executing_breakpoint_commands) |
| error ("Can't use the \"commands\" command among a breakpoint's commands."); |
| |
| p = arg; |
| bnum = get_number (&p); |
| |
| if (p && *p) |
| error ("Unexpected extra arguments following breakpoint number."); |
| |
| ALL_BREAKPOINTS (b) |
| if (b->number == bnum) |
| { |
| char tmpbuf[128]; |
| sprintf (tmpbuf, |
| "Type commands for when breakpoint %d is hit, one per line.", |
| bnum); |
| l = read_command_lines (tmpbuf, from_tty); |
| free_command_lines (&b->commands); |
| b->commands = l; |
| breakpoints_changed (); |
| breakpoint_modify_event (b->number); |
| return; |
| } |
| error ("No breakpoint number %d.", bnum); |
| } |
| |
| /* Like target_read_memory() but if breakpoints are inserted, return |
| the shadow contents instead of the breakpoints themselves. |
| |
| Read "memory data" from whatever target or inferior we have. |
| Returns zero if successful, errno value if not. EIO is used |
| for address out of bounds. If breakpoints are inserted, returns |
| shadow contents, not the breakpoints themselves. From breakpoint.c. */ |
| |
| int |
| read_memory_nobpt (CORE_ADDR memaddr, char *myaddr, unsigned len) |
| { |
| int status; |
| struct breakpoint *b; |
| CORE_ADDR bp_addr = 0; |
| int bp_size = 0; |
| |
| if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL) |
| /* No breakpoints on this machine. */ |
| return target_read_memory (memaddr, myaddr, len); |
| |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->type == bp_none) |
| warning ("reading through apparently deleted breakpoint #%d?", |
| b->number); |
| |
| /* memory breakpoint? */ |
| if (b->type == bp_watchpoint |
| || b->type == bp_hardware_watchpoint |
| || b->type == bp_read_watchpoint |
| || b->type == bp_access_watchpoint) |
| continue; |
| /* bp in memory? */ |
| if (!b->inserted) |
| continue; |
| /* Addresses and length of the part of the breakpoint that |
| we need to copy. */ |
| /* XXXX The m68k, sh and h8300 have different local and remote |
| breakpoint values. BREAKPOINT_FROM_PC still manages to |
| correctly determine the breakpoints memory address and size |
| for these targets. */ |
| bp_addr = b->address; |
| bp_size = 0; |
| if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL) |
| continue; |
| if (bp_size == 0) |
| /* bp isn't valid */ |
| continue; |
| if (bp_addr + bp_size <= memaddr) |
| /* The breakpoint is entirely before the chunk of memory we |
| are reading. */ |
| continue; |
| if (bp_addr >= memaddr + len) |
| /* The breakpoint is entirely after the chunk of memory we are |
| reading. */ |
| continue; |
| /* Copy the breakpoint from the shadow contents, and recurse for |
| the things before and after. */ |
| { |
| /* Offset within shadow_contents. */ |
| int bptoffset = 0; |
| |
| if (bp_addr < memaddr) |
| { |
| /* Only copy the second part of the breakpoint. */ |
| bp_size -= memaddr - bp_addr; |
| bptoffset = memaddr - bp_addr; |
| bp_addr = memaddr; |
| } |
| |
| if (bp_addr + bp_size > memaddr + len) |
| { |
| /* Only copy the first part of the breakpoint. */ |
| bp_size -= (bp_addr + bp_size) - (memaddr + len); |
| } |
| |
| memcpy (myaddr + bp_addr - memaddr, |
| b->shadow_contents + bptoffset, bp_size); |
| |
| if (bp_addr > memaddr) |
| { |
| /* Copy the section of memory before the breakpoint. */ |
| status = read_memory_nobpt (memaddr, myaddr, bp_addr - memaddr); |
| if (status != 0) |
| return status; |
| } |
| |
| if (bp_addr + bp_size < memaddr + len) |
| { |
| /* Copy the section of memory after the breakpoint. */ |
| status = read_memory_nobpt (bp_addr + bp_size, |
| myaddr + bp_addr + bp_size - memaddr, |
| memaddr + len - (bp_addr + bp_size)); |
| if (status != 0) |
| return status; |
| } |
| return 0; |
| } |
| } |
| /* Nothing overlaps. Just call read_memory_noerr. */ |
| return target_read_memory (memaddr, myaddr, len); |
| } |
| |
| |
| /* insert_breakpoints is used when starting or continuing the program. |
| remove_breakpoints is used when the program stops. |
| Both return zero if successful, |
| or an `errno' value if could not write the inferior. */ |
| |
| int |
| insert_breakpoints (void) |
| { |
| register struct breakpoint *b, *temp; |
| int return_val = 0; /* return success code. */ |
| int val = 0; |
| int disabled_breaks = 0; |
| int hw_breakpoint_error = 0; |
| #ifdef ONE_PROCESS_WRITETEXT |
| int process_warning = 0; |
| #endif |
| |
| static char message1[] = "Error inserting catchpoint %d:\n"; |
| static char message[sizeof (message1) + 30]; |
| |
| struct ui_file *tmp_error_stream = mem_fileopen (); |
| make_cleanup_ui_file_delete (tmp_error_stream); |
| |
| /* Explicitly mark the warning -- this will only be printed if |
| there was an error. */ |
| fprintf_unfiltered (tmp_error_stream, "Warning:\n"); |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| /* Permanent breakpoints cannot be inserted or removed. Disabled |
| breakpoints should not be inserted. */ |
| if (b->enable_state != bp_enabled) |
| continue; |
| |
| if ((b->type == bp_watchpoint |
| || b->type == bp_hardware_watchpoint |
| || b->type == bp_read_watchpoint |
| || b->type == bp_access_watchpoint) && (!b->val)) |
| { |
| struct value *val; |
| val = evaluate_expression (b->exp); |
| release_value (val); |
| if (VALUE_LAZY (val)) |
| value_fetch_lazy (val); |
| b->val = val; |
| } |
| if (b->type != bp_watchpoint |
| && b->type != bp_hardware_watchpoint |
| && b->type != bp_read_watchpoint |
| && b->type != bp_access_watchpoint |
| && b->type != bp_catch_fork |
| && b->type != bp_catch_vfork |
| && b->type != bp_catch_exec |
| && b->type != bp_catch_throw |
| && b->type != bp_catch_catch |
| && !b->inserted |
| && !b->duplicate) |
| { |
| /* "Normal" instruction breakpoint: either the standard |
| trap-instruction bp (bp_breakpoint), or a |
| bp_hardware_breakpoint. */ |
| |
| /* First check to see if we have to handle an overlay. */ |
| if (overlay_debugging == ovly_off |
| || b->section == NULL |
| || !(section_is_overlay (b->section))) |
| { |
| /* No overlay handling: just set the breakpoint. */ |
| |
| if (b->type == bp_hardware_breakpoint) |
| val = target_insert_hw_breakpoint (b->address, |
| b->shadow_contents); |
| else |
| val = target_insert_breakpoint (b->address, b->shadow_contents); |
| } |
| else |
| { |
| /* This breakpoint is in an overlay section. |
| Shall we set a breakpoint at the LMA? */ |
| if (!overlay_events_enabled) |
| { |
| /* Yes -- overlay event support is not active, |
| so we must try to set a breakpoint at the LMA. |
| This will not work for a hardware breakpoint. */ |
| if (b->type == bp_hardware_breakpoint) |
| warning ("hardware breakpoint %d not supported in overlay!\n", |
| b->number); |
| else |
| { |
| CORE_ADDR addr = overlay_unmapped_address (b->address, |
| b->section); |
| /* Set a software (trap) breakpoint at the LMA. */ |
| val = target_insert_breakpoint (addr, b->shadow_contents); |
| if (val != 0) |
| fprintf_unfiltered (tmp_error_stream, |
| "Overlay breakpoint %d failed: in ROM?", |
| b->number); |
| } |
| } |
| /* Shall we set a breakpoint at the VMA? */ |
| if (section_is_mapped (b->section)) |
| { |
| /* Yes. This overlay section is mapped into memory. */ |
| if (b->type == bp_hardware_breakpoint) |
| val = target_insert_hw_breakpoint (b->address, |
| b->shadow_contents); |
| else |
| val = target_insert_breakpoint (b->address, |
| b->shadow_contents); |
| } |
| else |
| { |
| /* No. This breakpoint will not be inserted. |
| No error, but do not mark the bp as 'inserted'. */ |
| continue; |
| } |
| } |
| |
| if (val) |
| { |
| /* Can't set the breakpoint. */ |
| #if defined (DISABLE_UNSETTABLE_BREAK) |
| if (DISABLE_UNSETTABLE_BREAK (b->address)) |
| { |
| /* See also: disable_breakpoints_in_shlibs. */ |
| val = 0; |
| b->enable_state = bp_shlib_disabled; |
| if (!disabled_breaks) |
| { |
| fprintf_unfiltered (tmp_error_stream, |
| "Cannot insert breakpoint %d.\n", |
| b->number); |
| fprintf_unfiltered (tmp_error_stream, |
| "Temporarily disabling shared library breakpoints:\n"); |
| } |
| disabled_breaks = 1; |
| fprintf_unfiltered (tmp_error_stream, |
| "breakpoint #%d\n", b->number); |
| } |
| else |
| #endif |
| { |
| #ifdef ONE_PROCESS_WRITETEXT |
| process_warning = 1; |
| #endif |
| if (b->type == bp_hardware_breakpoint) |
| { |
| hw_breakpoint_error = 1; |
| fprintf_unfiltered (tmp_error_stream, |
| "Cannot insert hardware breakpoint %d.\n", |
| b->number); |
| } |
| else |
| { |
| fprintf_unfiltered (tmp_error_stream, |
| "Cannot insert breakpoint %d.\n", |
| b->number); |
| fprintf_filtered (tmp_error_stream, |
| "Error accessing memory address "); |
| print_address_numeric (b->address, 1, tmp_error_stream); |
| fprintf_filtered (tmp_error_stream, ": %s.\n", |
| safe_strerror (val)); |
| } |
| |
| } |
| } |
| else |
| b->inserted = 1; |
| |
| if (val) |
| return_val = val; /* remember failure */ |
| } |
| else if (ep_is_exception_catchpoint (b) |
| && !b->inserted |
| && !b->duplicate) |
| |
| { |
| /* If we get here, we must have a callback mechanism for exception |
| events -- with g++ style embedded label support, we insert |
| ordinary breakpoints and not catchpoints. */ |
| /* Format possible error message */ |
| sprintf (message, message1, b->number); |
| |
| val = target_insert_breakpoint (b->address, b->shadow_contents); |
| if (val) |
| { |
| /* Couldn't set breakpoint for some reason */ |
| fprintf_unfiltered (tmp_error_stream, |
| "Cannot insert catchpoint %d; disabling it.\n", |
| b->number); |
| fprintf_filtered (tmp_error_stream, |
| "Error accessing memory address "); |
| print_address_numeric (b->address, 1, tmp_error_stream); |
| fprintf_filtered (tmp_error_stream, ": %s.\n", |
| safe_strerror (val)); |
| b->enable_state = bp_disabled; |
| } |
| else |
| { |
| /* Bp set, now make sure callbacks are enabled */ |
| int val; |
| args_for_catchpoint_enable args; |
| args.kind = b->type == bp_catch_catch ? |
| EX_EVENT_CATCH : EX_EVENT_THROW; |
| args.enable_p = 1; |
| val = catch_errors (cover_target_enable_exception_callback, |
| &args, |
| message, RETURN_MASK_ALL); |
| if (val != 0 && val != -1) |
| { |
| b->inserted = 1; |
| } |
| /* Check if something went wrong; val == 0 can be ignored */ |
| if (val == -1) |
| { |
| /* something went wrong */ |
| fprintf_unfiltered (tmp_error_stream, |
| "Cannot insert catchpoint %d; disabling it.\n", |
| b->number); |
| b->enable_state = bp_disabled; |
| } |
| } |
| |
| if (val) |
| return_val = val; /* remember failure */ |
| } |
| |
| else if ((b->type == bp_hardware_watchpoint || |
| b->type == bp_read_watchpoint || |
| b->type == bp_access_watchpoint) |
| && b->disposition != disp_del_at_next_stop |
| && !b->inserted |
| && !b->duplicate) |
| { |
| struct frame_info *saved_frame; |
| int saved_level, within_current_scope; |
| struct value *mark = value_mark (); |
| struct value *v; |
| |
| /* Save the current frame and level so we can restore it after |
| evaluating the watchpoint expression on its own frame. */ |
| saved_frame = deprecated_selected_frame; |
| saved_level = frame_relative_level (deprecated_selected_frame); |
| |
| /* Determine if the watchpoint is within scope. */ |
| if (b->exp_valid_block == NULL) |
| within_current_scope = 1; |
| else |
| { |
| struct frame_info *fi; |
| fi = frame_find_by_id (b->watchpoint_frame); |
| within_current_scope = (fi != NULL); |
| if (within_current_scope) |
| select_frame (fi); |
| } |
| |
| if (within_current_scope) |
| { |
| /* Evaluate the expression and cut the chain of values |
| produced off from the value chain. |
| |
| Make sure the value returned isn't lazy; we use |
| laziness to determine what memory GDB actually needed |
| in order to compute the value of the expression. */ |
| v = evaluate_expression (b->exp); |
| VALUE_CONTENTS(v); |
| value_release_to_mark (mark); |
| |
| b->val_chain = v; |
| b->inserted = 1; |
| |
| /* Look at each value on the value chain. */ |
| for (; v; v = v->next) |
| { |
| /* If it's a memory location, and GDB actually needed |
| its contents to evaluate the expression, then we |
| must watch it. */ |
| if (VALUE_LVAL (v) == lval_memory |
| && ! VALUE_LAZY (v)) |
| { |
| struct type *vtype = check_typedef (VALUE_TYPE (v)); |
| |
| /* We only watch structs and arrays if user asked |
| for it explicitly, never if they just happen to |
| appear in the middle of some value chain. */ |
| if (v == b->val_chain |
| || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT |
| && TYPE_CODE (vtype) != TYPE_CODE_ARRAY)) |
| { |
| CORE_ADDR addr; |
| int len, type; |
| |
| addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); |
| len = TYPE_LENGTH (VALUE_TYPE (v)); |
| type = hw_write; |
| if (b->type == bp_read_watchpoint) |
| type = hw_read; |
| else if (b->type == bp_access_watchpoint) |
| type = hw_access; |
| |
| val = target_insert_watchpoint (addr, len, type); |
| if (val == -1) |
| { |
| /* Don't exit the loop, try to insert |
| every value on the value chain. That's |
| because we will be removing all the |
| watches below, and removing a |
| watchpoint we didn't insert could have |
| adverse effects. */ |
| b->inserted = 0; |
| } |
| val = 0; |
| } |
| } |
| } |
| /* Failure to insert a watchpoint on any memory value in the |
| value chain brings us here. */ |
| if (!b->inserted) |
| { |
| remove_breakpoint (b, mark_uninserted); |
| hw_breakpoint_error = 1; |
| fprintf_unfiltered (tmp_error_stream, |
| "Could not insert hardware watchpoint %d.\n", |
| b->number); |
| val = -1; |
| } |
| } |
| else |
| { |
| printf_filtered ("Hardware watchpoint %d deleted ", b->number); |
| printf_filtered ("because the program has left the block \n"); |
| printf_filtered ("in which its expression is valid.\n"); |
| if (b->related_breakpoint) |
| b->related_breakpoint->disposition = disp_del_at_next_stop; |
| b->disposition = disp_del_at_next_stop; |
| } |
| |
| /* Restore the frame and level. */ |
| if ((saved_frame != deprecated_selected_frame) || |
| (saved_level != frame_relative_level (deprecated_selected_frame))) |
| select_frame (saved_frame); |
| |
| if (val) |
| return_val = val; /* remember failure */ |
| } |
| else if ((b->type == bp_catch_fork |
| || b->type == bp_catch_vfork |
| || b->type == bp_catch_exec) |
| && !b->inserted |
| && !b->duplicate) |
| { |
| val = -1; |
| switch (b->type) |
| { |
| case bp_catch_fork: |
| val = target_insert_fork_catchpoint (PIDGET (inferior_ptid)); |
| break; |
| case bp_catch_vfork: |
| val = target_insert_vfork_catchpoint (PIDGET (inferior_ptid)); |
| break; |
| case bp_catch_exec: |
| val = target_insert_exec_catchpoint (PIDGET (inferior_ptid)); |
| break; |
| default: |
| warning ("Internal error, %s line %d.", __FILE__, __LINE__); |
| break; |
| } |
| if (val < 0) |
| { |
| fprintf_unfiltered (tmp_error_stream, |
| "Cannot insert catchpoint %d.", b->number); |
| } |
| else |
| b->inserted = 1; |
| |
| if (val) |
| return_val = val; /* remember failure */ |
| } |
| } |
| |
| if (return_val) |
| { |
| /* If a hardware breakpoint or watchpoint was inserted, add a |
| message about possibly exhausted resources. */ |
| if (hw_breakpoint_error) |
| { |
| fprintf_unfiltered (tmp_error_stream, |
| "Could not insert hardware breakpoints:\n\ |
| You may have requested too many hardware breakpoints/watchpoints.\n"); |
| } |
| #ifdef ONE_PROCESS_WRITETEXT |
| if (process_warning) |
| fprintf_unfiltered (tmp_error_stream, |
| "The same program may be running in another process."); |
| #endif |
| target_terminal_ours_for_output (); |
| error_stream (tmp_error_stream); |
| } |
| return return_val; |
| } |
| |
| int |
| remove_breakpoints (void) |
| { |
| register struct breakpoint *b; |
| int val; |
| |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->inserted) |
| { |
| val = remove_breakpoint (b, mark_uninserted); |
| if (val != 0) |
| return val; |
| } |
| } |
| return 0; |
| } |
| |
| int |
| remove_hw_watchpoints (void) |
| { |
| register struct breakpoint *b; |
| int val; |
| |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->inserted |
| && (b->type == bp_hardware_watchpoint |
| || b->type == bp_read_watchpoint |
| || b->type == bp_access_watchpoint)) |
| { |
| val = remove_breakpoint (b, mark_uninserted); |
| if (val != 0) |
| return val; |
| } |
| } |
| return 0; |
| } |
| |
| int |
| reattach_breakpoints (int pid) |
| { |
| register struct breakpoint *b; |
| int val; |
| struct cleanup *old_chain = save_inferior_ptid (); |
| |
| /* Set inferior_ptid; remove_breakpoint uses this global. */ |
| inferior_ptid = pid_to_ptid (pid); |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->inserted) |
| { |
| remove_breakpoint (b, mark_inserted); |
| if (b->type == bp_hardware_breakpoint) |
| val = target_insert_hw_breakpoint (b->address, b->shadow_contents); |
| else |
| val = target_insert_breakpoint (b->address, b->shadow_contents); |
| if (val != 0) |
| { |
| do_cleanups (old_chain); |
| return val; |
| } |
| } |
| } |
| do_cleanups (old_chain); |
| return 0; |
| } |
| |
| void |
| update_breakpoints_after_exec (void) |
| { |
| struct breakpoint *b; |
| struct breakpoint *temp; |
| |
| /* Doing this first prevents the badness of having delete_breakpoint() |
| write a breakpoint's current "shadow contents" to lift the bp. That |
| shadow is NOT valid after an exec()! */ |
| mark_breakpoints_out (); |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| /* Solib breakpoints must be explicitly reset after an exec(). */ |
| if (b->type == bp_shlib_event) |
| { |
| delete_breakpoint (b); |
| continue; |
| } |
| |
| /* Thread event breakpoints must be set anew after an exec(), |
| as must overlay event breakpoints. */ |
| if (b->type == bp_thread_event || b->type == bp_overlay_event) |
| { |
| delete_breakpoint (b); |
| continue; |
| } |
| |
| /* Step-resume breakpoints are meaningless after an exec(). */ |
| if (b->type == bp_step_resume) |
| { |
| delete_breakpoint (b); |
| continue; |
| } |
| |
| /* Ditto the sigtramp handler breakpoints. */ |
| if (b->type == bp_through_sigtramp) |
| { |
| delete_breakpoint (b); |
| continue; |
| } |
| |
| /* Ditto the exception-handling catchpoints. */ |
| if ((b->type == bp_catch_catch) || (b->type == bp_catch_throw)) |
| { |
| delete_breakpoint (b); |
| continue; |
| } |
| |
| /* Don't delete an exec catchpoint, because else the inferior |
| won't stop when it ought! |
| |
| Similarly, we probably ought to keep vfork catchpoints, 'cause |
| on this target, we may not be able to stop when the vfork is |
| seen, but only when the subsequent exec is seen. (And because |
| deleting fork catchpoints here but not vfork catchpoints will |
| seem mysterious to users, keep those too.) |
| |
| ??rehrauer: Let's hope that merely clearing out this catchpoint's |
| target address field, if any, is sufficient to have it be reset |
| automagically. Certainly on HP-UX that's true. |
| |
| Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly |
| valid code address on some platforms (like the OBSOLETE mn10200 |
| and mn10300 simulators). We shouldn't assign any special |
| interpretation to a breakpoint with a zero address. And in |
| fact, GDB doesn't --- I can't see what that comment above is |
| talking about. As far as I can tell, setting the address of a |
| bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero |
| is meaningless, since those are implemented with HP-UX kernel |
| hackery, not by storing breakpoint instructions somewhere. */ |
| if ((b->type == bp_catch_exec) || |
| (b->type == bp_catch_vfork) || |
| (b->type == bp_catch_fork)) |
| { |
| b->address = (CORE_ADDR) NULL; |
| continue; |
| } |
| |
| /* bp_finish is a special case. The only way we ought to be able |
| to see one of these when an exec() has happened, is if the user |
| caught a vfork, and then said "finish". Ordinarily a finish just |
| carries them to the call-site of the current callee, by setting |
| a temporary bp there and resuming. But in this case, the finish |
| will carry them entirely through the vfork & exec. |
| |
| We don't want to allow a bp_finish to remain inserted now. But |
| we can't safely delete it, 'cause finish_command has a handle to |
| the bp on a bpstat, and will later want to delete it. There's a |
| chance (and I've seen it happen) that if we delete the bp_finish |
| here, that its storage will get reused by the time finish_command |
| gets 'round to deleting the "use to be a bp_finish" breakpoint. |
| We really must allow finish_command to delete a bp_finish. |
| |
| In the absense of a general solution for the "how do we know |
| it's safe to delete something others may have handles to?" |
| problem, what we'll do here is just uninsert the bp_finish, and |
| let finish_command delete it. |
| |
| (We know the bp_finish is "doomed" in the sense that it's |
| momentary, and will be deleted as soon as finish_command sees |
| the inferior stopped. So it doesn't matter that the bp's |
| address is probably bogus in the new a.out, unlike e.g., the |
| solib breakpoints.) */ |
| |
| if (b->type == bp_finish) |
| { |
| continue; |
| } |
| |
| /* Without a symbolic address, we have little hope of the |
| pre-exec() address meaning the same thing in the post-exec() |
| a.out. */ |
| if (b->addr_string == NULL) |
| { |
| delete_breakpoint (b); |
| continue; |
| } |
| |
| /* If this breakpoint has survived the above battery of checks, then |
| it must have a symbolic address. Be sure that it gets reevaluated |
| to a target address, rather than reusing the old evaluation. |
| |
| Jim Blandy <jimb@redhat.com>: As explained above in the comment |
| for bp_catch_exec and friends, I'm pretty sure this is entirely |
| unnecessary. A call to breakpoint_re_set_one always recomputes |
| the breakpoint's address from scratch, or deletes it if it can't. |
| So I think this assignment could be deleted without effect. */ |
| b->address = (CORE_ADDR) NULL; |
| } |
| /* FIXME what about longjmp breakpoints? Re-create them here? */ |
| create_overlay_event_breakpoint ("_ovly_debug_event"); |
| } |
| |
| int |
| detach_breakpoints (int pid) |
| { |
| register struct breakpoint *b; |
| int val; |
| struct cleanup *old_chain = save_inferior_ptid (); |
| |
| if (pid == PIDGET (inferior_ptid)) |
| error ("Cannot detach breakpoints of inferior_ptid"); |
| |
| /* Set inferior_ptid; remove_breakpoint uses this global. */ |
| inferior_ptid = pid_to_ptid (pid); |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->inserted) |
| { |
| val = remove_breakpoint (b, mark_inserted); |
| if (val != 0) |
| { |
| do_cleanups (old_chain); |
| return val; |
| } |
| } |
| } |
| do_cleanups (old_chain); |
| return 0; |
| } |
| |
| static int |
| remove_breakpoint (struct breakpoint *b, insertion_state_t is) |
| { |
| int val; |
| |
| if (b->enable_state == bp_permanent) |
| /* Permanent breakpoints cannot be inserted or removed. */ |
| return 0; |
| |
| if (b->type == bp_none) |
| warning ("attempted to remove apparently deleted breakpoint #%d?", |
| b->number); |
| |
| if (b->type != bp_watchpoint |
| && b->type != bp_hardware_watchpoint |
| && b->type != bp_read_watchpoint |
| && b->type != bp_access_watchpoint |
| && b->type != bp_catch_fork |
| && b->type != bp_catch_vfork |
| && b->type != bp_catch_exec |
| && b->type != bp_catch_catch |
| && b->type != bp_catch_throw) |
| { |
| /* "Normal" instruction breakpoint: either the standard |
| trap-instruction bp (bp_breakpoint), or a |
| bp_hardware_breakpoint. */ |
| |
| /* First check to see if we have to handle an overlay. */ |
| if (overlay_debugging == ovly_off |
| || b->section == NULL |
| || !(section_is_overlay (b->section))) |
| { |
| /* No overlay handling: just remove the breakpoint. */ |
| |
| if (b->type == bp_hardware_breakpoint) |
| val = target_remove_hw_breakpoint (b->address, |
| b->shadow_contents); |
| else |
| val = target_remove_breakpoint (b->address, b->shadow_contents); |
| } |
| else |
| { |
| /* This breakpoint is in an overlay section. |
| Did we set a breakpoint at the LMA? */ |
| if (!overlay_events_enabled) |
| { |
| /* Yes -- overlay event support is not active, so we |
| should have set a breakpoint at the LMA. Remove it. |
| */ |
| CORE_ADDR addr = overlay_unmapped_address (b->address, |
| b->section); |
| /* Ignore any failures: if the LMA is in ROM, we will |
| have already warned when we failed to insert it. */ |
| if (b->type != bp_hardware_breakpoint) |
| target_remove_hw_breakpoint (addr, b->shadow_contents); |
| else |
| target_remove_breakpoint (addr, b->shadow_contents); |
| } |
| /* Did we set a breakpoint at the VMA? |
| If so, we will have marked the breakpoint 'inserted'. */ |
| if (b->inserted) |
| { |
| /* Yes -- remove it. Previously we did not bother to |
| remove the breakpoint if the section had been |
| unmapped, but let's not rely on that being safe. We |
| don't know what the overlay manager might do. */ |
| if (b->type == bp_hardware_breakpoint) |
| val = target_remove_hw_breakpoint (b->address, |
| b->shadow_contents); |
| else |
| val = target_remove_breakpoint (b->address, |
| b->shadow_contents); |
| } |
| else |
| { |
| /* No -- not inserted, so no need to remove. No error. */ |
| val = 0; |
| } |
| } |
| if (val) |
| return val; |
| b->inserted = (is == mark_inserted); |
| } |
| else if ((b->type == bp_hardware_watchpoint || |
| b->type == bp_read_watchpoint || |
| b->type == bp_access_watchpoint) |
| && b->enable_state == bp_enabled |
| && !b->duplicate) |
| { |
| struct value *v; |
| struct value *n; |
| |
| b->inserted = (is == mark_inserted); |
| /* Walk down the saved value chain. */ |
| for (v = b->val_chain; v; v = v->next) |
| { |
| /* For each memory reference remove the watchpoint |
| at that address. */ |
| if (VALUE_LVAL (v) == lval_memory |
| && ! VALUE_LAZY (v)) |
| { |
| struct type *vtype = check_typedef (VALUE_TYPE (v)); |
| |
| if (v == b->val_chain |
| || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT |
| && TYPE_CODE (vtype) != TYPE_CODE_ARRAY)) |
| { |
| CORE_ADDR addr; |
| int len, type; |
| |
| addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); |
| len = TYPE_LENGTH (VALUE_TYPE (v)); |
| type = hw_write; |
| if (b->type == bp_read_watchpoint) |
| type = hw_read; |
| else if (b->type == bp_access_watchpoint) |
| type = hw_access; |
| |
| val = target_remove_watchpoint (addr, len, type); |
| if (val == -1) |
| b->inserted = 1; |
| val = 0; |
| } |
| } |
| } |
| /* Failure to remove any of the hardware watchpoints comes here. */ |
| if ((is == mark_uninserted) && (b->inserted)) |
| warning ("Could not remove hardware watchpoint %d.", |
| b->number); |
| |
| /* Free the saved value chain. We will construct a new one |
| the next time the watchpoint is inserted. */ |
| for (v = b->val_chain; v; v = n) |
| { |
| n = v->next; |
| value_free (v); |
| } |
| b->val_chain = NULL; |
| } |
| else if ((b->type == bp_catch_fork || |
| b->type == bp_catch_vfork || |
| b->type == bp_catch_exec) |
| && b->enable_state == bp_enabled |
| && !b->duplicate) |
| { |
| val = -1; |
| switch (b->type) |
| { |
| case bp_catch_fork: |
| val = target_remove_fork_catchpoint (PIDGET (inferior_ptid)); |
| break; |
| case bp_catch_vfork: |
| val = target_remove_vfork_catchpoint (PIDGET (inferior_ptid)); |
| break; |
| case bp_catch_exec: |
| val = target_remove_exec_catchpoint (PIDGET (inferior_ptid)); |
| break; |
| default: |
| warning ("Internal error, %s line %d.", __FILE__, __LINE__); |
| break; |
| } |
| if (val) |
| return val; |
| b->inserted = (is == mark_inserted); |
| } |
| else if ((b->type == bp_catch_catch || |
| b->type == bp_catch_throw) |
| && b->enable_state == bp_enabled |
| && !b->duplicate) |
| { |
| |
| val = target_remove_breakpoint (b->address, b->shadow_contents); |
| if (val) |
| return val; |
| b->inserted = (is == mark_inserted); |
| } |
| else if (ep_is_exception_catchpoint (b) |
| && b->inserted /* sometimes previous insert doesn't happen */ |
| && b->enable_state == bp_enabled |
| && !b->duplicate) |
| { |
| |
| val = target_remove_breakpoint (b->address, b->shadow_contents); |
| if (val) |
| return val; |
| |
| b->inserted = (is == mark_inserted); |
| } |
| |
| return 0; |
| } |
| |
| /* Clear the "inserted" flag in all breakpoints. */ |
| |
| void |
| mark_breakpoints_out (void) |
| { |
| register struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| b->inserted = 0; |
| } |
| |
| /* Clear the "inserted" flag in all breakpoints and delete any |
| breakpoints which should go away between runs of the program. |
| |
| Plus other such housekeeping that has to be done for breakpoints |
| between runs. |
| |
| Note: this function gets called at the end of a run (by |
| generic_mourn_inferior) and when a run begins (by |
| init_wait_for_inferior). */ |
| |
| |
| |
| void |
| breakpoint_init_inferior (enum inf_context context) |
| { |
| register struct breakpoint *b, *temp; |
| static int warning_needed = 0; |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| b->inserted = 0; |
| |
| switch (b->type) |
| { |
| case bp_call_dummy: |
| case bp_watchpoint_scope: |
| |
| /* If the call dummy breakpoint is at the entry point it will |
| cause problems when the inferior is rerun, so we better |
| get rid of it. |
| |
| Also get rid of scope breakpoints. */ |
| delete_breakpoint (b); |
| break; |
| |
| case bp_watchpoint: |
| case bp_hardware_watchpoint: |
| case bp_read_watchpoint: |
| case bp_access_watchpoint: |
| |
| /* Likewise for watchpoints on local expressions. */ |
| if (b->exp_valid_block != NULL) |
| delete_breakpoint (b); |
| if (context == inf_starting) |
| { |
| /* Reset val field to force reread of starting value |
| in insert_breakpoints. */ |
| if (b->val) |
| value_free (b->val); |
| b->val = NULL; |
| } |
| break; |
| default: |
| /* Likewise for exception catchpoints in dynamic-linked |
| executables where required */ |
| if (ep_is_exception_catchpoint (b) && |
| exception_catchpoints_are_fragile) |
| { |
| warning_needed = 1; |
| delete_breakpoint (b); |
| } |
| break; |
| } |
| } |
| |
| if (exception_catchpoints_are_fragile) |
| exception_support_initialized = 0; |
| |
| /* Don't issue the warning unless it's really needed... */ |
| if (warning_needed && (context != inf_exited)) |
| { |
| warning ("Exception catchpoints from last run were deleted."); |
| warning ("You must reinsert them explicitly."); |
| warning_needed = 0; |
| } |
| } |
| |
| /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint |
| exists at PC. It returns ordinary_breakpoint_here if it's an |
| ordinary breakpoint, or permanent_breakpoint_here if it's a |
| permanent breakpoint. |
| - When continuing from a location with an ordinary breakpoint, we |
| actually single step once before calling insert_breakpoints. |
| - When continuing from a localion with a permanent breakpoint, we |
| need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by |
| the target, to advance the PC past the breakpoint. */ |
| |
| enum breakpoint_here |
| breakpoint_here_p (CORE_ADDR pc) |
| { |
| register struct breakpoint *b; |
| int any_breakpoint_here = 0; |
| |
| ALL_BREAKPOINTS (b) |
| if ((b->enable_state == bp_enabled |
| || b->enable_state == bp_permanent) |
| && b->address == pc) /* bp is enabled and matches pc */ |
| { |
| if (overlay_debugging |
| && section_is_overlay (b->section) |
| && !section_is_mapped (b->section)) |
| continue; /* unmapped overlay -- can't be a match */ |
| else if (b->enable_state == bp_permanent) |
| return permanent_breakpoint_here; |
| else |
| any_breakpoint_here = 1; |
| } |
| |
| return any_breakpoint_here ? ordinary_breakpoint_here : 0; |
| } |
| |
| |
| /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(), |
| but it only returns true if there is actually a breakpoint inserted |
| at PC. */ |
| |
| int |
| breakpoint_inserted_here_p (CORE_ADDR pc) |
| { |
| register struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->inserted |
| && b->address == pc) /* bp is inserted and matches pc */ |
| { |
| if (overlay_debugging |
| && section_is_overlay (b->section) |
| && !section_is_mapped (b->section)) |
| continue; /* unmapped overlay -- can't be a match */ |
| else |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* Return nonzero if FRAME is a dummy frame. We can't use |
| DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would |
| take too much time, at least using get_saved_register on the 68k. |
| This means that for this function to work right a port must use the |
| bp_call_dummy breakpoint. */ |
| |
| int |
| deprecated_frame_in_dummy (struct frame_info *frame) |
| { |
| struct breakpoint *b; |
| |
| if (!CALL_DUMMY_P) |
| return 0; |
| |
| /* This function is used by two files: get_frame_type(), after first |
| checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and |
| sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */ |
| gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES); |
| |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->type == bp_call_dummy |
| && frame_id_eq (b->frame_id, get_frame_id (frame)) |
| /* We need to check the PC as well as the frame on the sparc, |
| for signals.exp in the testsuite. */ |
| && (get_frame_pc (frame) |
| >= (b->address |
| - SIZEOF_CALL_DUMMY_WORDS / sizeof (LONGEST) * REGISTER_SIZE)) |
| && get_frame_pc (frame) <= b->address) |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* breakpoint_thread_match (PC, PID) returns true if the breakpoint at |
| PC is valid for process/thread PID. */ |
| |
| int |
| breakpoint_thread_match (CORE_ADDR pc, ptid_t ptid) |
| { |
| struct breakpoint *b; |
| int thread; |
| |
| thread = pid_to_thread_id (ptid); |
| |
| ALL_BREAKPOINTS (b) |
| if (b->enable_state != bp_disabled |
| && b->enable_state != bp_shlib_disabled |
| && b->enable_state != bp_call_disabled |
| && b->address == pc |
| && (b->thread == -1 || b->thread == thread)) |
| { |
| if (overlay_debugging |
| && section_is_overlay (b->section) |
| && !section_is_mapped (b->section)) |
| continue; /* unmapped overlay -- can't be a match */ |
| else |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| |
| /* bpstat stuff. External routines' interfaces are documented |
| in breakpoint.h. */ |
| |
| int |
| ep_is_catchpoint (struct breakpoint *ep) |
| { |
| return |
| (ep->type == bp_catch_load) |
| || (ep->type == bp_catch_unload) |
| || (ep->type == bp_catch_fork) |
| || (ep->type == bp_catch_vfork) |
| || (ep->type == bp_catch_exec) |
| || (ep->type == bp_catch_catch) |
| || (ep->type == bp_catch_throw); |
| |
| /* ??rehrauer: Add more kinds here, as are implemented... */ |
| } |
| |
| int |
| ep_is_shlib_catchpoint (struct breakpoint *ep) |
| { |
| return |
| (ep->type == bp_catch_load) |
| || (ep->type == bp_catch_unload); |
| } |
| |
| int |
| ep_is_exception_catchpoint (struct breakpoint *ep) |
| { |
| return |
| (ep->type == bp_catch_catch) |
| || (ep->type == bp_catch_throw); |
| } |
| |
| /* Clear a bpstat so that it says we are not at any breakpoint. |
| Also free any storage that is part of a bpstat. */ |
| |
| void |
| bpstat_clear (bpstat *bsp) |
| { |
| bpstat p; |
| bpstat q; |
| |
| if (bsp == 0) |
| return; |
| p = *bsp; |
| while (p != NULL) |
| { |
| q = p->next; |
| if (p->old_val != NULL) |
| value_free (p->old_val); |
| free_command_lines (&p->commands); |
| xfree (p); |
| p = q; |
| } |
| *bsp = NULL; |
| } |
| |
| /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that |
| is part of the bpstat is copied as well. */ |
| |
| bpstat |
| bpstat_copy (bpstat bs) |
| { |
| bpstat p = NULL; |
| bpstat tmp; |
| bpstat retval = NULL; |
| |
| if (bs == NULL) |
| return bs; |
| |
| for (; bs != NULL; bs = bs->next) |
| { |
| tmp = (bpstat) xmalloc (sizeof (*tmp)); |
| memcpy (tmp, bs, sizeof (*tmp)); |
| if (p == NULL) |
| /* This is the first thing in the chain. */ |
| retval = tmp; |
| else |
| p->next = tmp; |
| p = tmp; |
| } |
| p->next = NULL; |
| return retval; |
| } |
| |
| /* Find the bpstat associated with this breakpoint */ |
| |
| bpstat |
| bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint) |
| { |
| if (bsp == NULL) |
| return NULL; |
| |
| for (; bsp != NULL; bsp = bsp->next) |
| { |
| if (bsp->breakpoint_at == breakpoint) |
| return bsp; |
| } |
| return NULL; |
| } |
| |
| /* Find a step_resume breakpoint associated with this bpstat. |
| (If there are multiple step_resume bp's on the list, this function |
| will arbitrarily pick one.) |
| |
| It is an error to use this function if BPSTAT doesn't contain a |
| step_resume breakpoint. |
| |
| See wait_for_inferior's use of this function. */ |
| struct breakpoint * |
| bpstat_find_step_resume_breakpoint (bpstat bsp) |
| { |
| int current_thread; |
| |
| if (bsp == NULL) |
| error ("Internal error (bpstat_find_step_resume_breakpoint)"); |
| |
| current_thread = pid_to_thread_id (inferior_ptid); |
| |
| for (; bsp != NULL; bsp = bsp->next) |
| { |
| if ((bsp->breakpoint_at != NULL) && |
| (bsp->breakpoint_at->type == bp_step_resume) && |
| (bsp->breakpoint_at->thread == current_thread || |
| bsp->breakpoint_at->thread == -1)) |
| return bsp->breakpoint_at; |
| } |
| |
| error ("Internal error (no step_resume breakpoint found)"); |
| } |
| |
| |
| /* Return the breakpoint number of the first breakpoint we are stopped |
| at. *BSP upon return is a bpstat which points to the remaining |
| breakpoints stopped at (but which is not guaranteed to be good for |
| anything but further calls to bpstat_num). |
| Return 0 if passed a bpstat which does not indicate any breakpoints. */ |
| |
| int |
| bpstat_num (bpstat *bsp) |
| { |
| struct breakpoint *b; |
| |
| if ((*bsp) == NULL) |
| return 0; /* No more breakpoint values */ |
| else |
| { |
| b = (*bsp)->breakpoint_at; |
| *bsp = (*bsp)->next; |
| if (b == NULL) |
| return -1; /* breakpoint that's been deleted since */ |
| else |
| return b->number; /* We have its number */ |
| } |
| } |
| |
| /* Modify BS so that the actions will not be performed. */ |
| |
| void |
| bpstat_clear_actions (bpstat bs) |
| { |
| for (; bs != NULL; bs = bs->next) |
| { |
| free_command_lines (&bs->commands); |
| if (bs->old_val != NULL) |
| { |
| value_free (bs->old_val); |
| bs->old_val = NULL; |
| } |
| } |
| } |
| |
| /* Stub for cleaning up our state if we error-out of a breakpoint command */ |
| /* ARGSUSED */ |
| static void |
| cleanup_executing_breakpoints (void *ignore) |
| { |
| executing_breakpoint_commands = 0; |
| } |
| |
| /* Execute all the commands associated with all the breakpoints at this |
| location. Any of these commands could cause the process to proceed |
| beyond this point, etc. We look out for such changes by checking |
| the global "breakpoint_proceeded" after each command. */ |
| |
| void |
| bpstat_do_actions (bpstat *bsp) |
| { |
| bpstat bs; |
| struct cleanup *old_chain; |
| struct command_line *cmd; |
| |
| /* Avoid endless recursion if a `source' command is contained |
| in bs->commands. */ |
| if (executing_breakpoint_commands) |
| return; |
| |
| executing_breakpoint_commands = 1; |
| old_chain = make_cleanup (cleanup_executing_breakpoints, 0); |
| |
| top: |
| /* Note that (as of this writing), our callers all appear to |
| be passing us the address of global stop_bpstat. And, if |
| our calls to execute_control_command cause the inferior to |
| proceed, that global (and hence, *bsp) will change. |
| |
| We must be careful to not touch *bsp unless the inferior |
| has not proceeded. */ |
| |
| /* This pointer will iterate over the list of bpstat's. */ |
| bs = *bsp; |
| |
| breakpoint_proceeded = 0; |
| for (; bs != NULL; bs = bs->next) |
| { |
| cmd = bs->commands; |
| while (cmd != NULL) |
| { |
| execute_control_command (cmd); |
| |
| if (breakpoint_proceeded) |
| break; |
| else |
| cmd = cmd->next; |
| } |
| if (breakpoint_proceeded) |
| /* The inferior is proceeded by the command; bomb out now. |
| The bpstat chain has been blown away by wait_for_inferior. |
| But since execution has stopped again, there is a new bpstat |
| to look at, so start over. */ |
| goto top; |
| else |
| free_command_lines (&bs->commands); |
| } |
| do_cleanups (old_chain); |
| } |
| |
| /* This is the normal print function for a bpstat. In the future, |
| much of this logic could (should?) be moved to bpstat_stop_status, |
| by having it set different print_it values. |
| |
| Current scheme: When we stop, bpstat_print() is called. It loops |
| through the bpstat list of things causing this stop, calling the |
| print_bp_stop_message function on each one. The behavior of the |
| print_bp_stop_message function depends on the print_it field of |
| bpstat. If such field so indicates, call this function here. |
| |
| Return values from this routine (ultimately used by bpstat_print() |
| and normal_stop() to decide what to do): |
| PRINT_NOTHING: Means we already printed all we needed to print, |
| don't print anything else. |
| PRINT_SRC_ONLY: Means we printed something, and we do *not* desire |
| that something to be followed by a location. |
| PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire |
| that something to be followed by a location. |
| PRINT_UNKNOWN: Means we printed nothing or we need to do some more |
| analysis. */ |
| |
| static enum print_stop_action |
| print_it_typical (bpstat bs) |
| { |
| struct cleanup *old_chain, *ui_out_chain; |
| struct ui_stream *stb; |
| stb = ui_out_stream_new (uiout); |
| old_chain = make_cleanup_ui_out_stream_delete (stb); |
| /* bs->breakpoint_at can be NULL if it was a momentary breakpoint |
| which has since been deleted. */ |
| if (bs->breakpoint_at == NULL) |
| return PRINT_UNKNOWN; |
| |
| switch (bs->breakpoint_at->type) |
| { |
| case bp_breakpoint: |
| case bp_hardware_breakpoint: |
| annotate_breakpoint (bs->breakpoint_at->number); |
| ui_out_text (uiout, "\nBreakpoint "); |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string (uiout, "reason", "breakpoint-hit"); |
| ui_out_field_int (uiout, "bkptno", bs->breakpoint_at->number); |
| ui_out_text (uiout, ", "); |
| return PRINT_SRC_AND_LOC; |
| break; |
| |
| case bp_shlib_event: |
| /* Did we stop because the user set the stop_on_solib_events |
| variable? (If so, we report this as a generic, "Stopped due |
| to shlib event" message.) */ |
| printf_filtered ("Stopped due to shared library event\n"); |
| return PRINT_NOTHING; |
| break; |
| |
| case bp_thread_event: |
| /* Not sure how we will get here. |
| GDB should not stop for these breakpoints. */ |
| printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n"); |
| return PRINT_NOTHING; |
| break; |
| |
| case bp_overlay_event: |
| /* By analogy with the thread event, GDB should not stop for these. */ |
| printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n"); |
| return PRINT_NOTHING; |
| break; |
| |
| case bp_catch_load: |
| annotate_catchpoint (bs->breakpoint_at->number); |
| printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); |
| printf_filtered ("loaded"); |
| printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname); |
| return PRINT_SRC_AND_LOC; |
| break; |
| |
| case bp_catch_unload: |
| annotate_catchpoint (bs->breakpoint_at->number); |
| printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); |
| printf_filtered ("unloaded"); |
| printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname); |
| return PRINT_SRC_AND_LOC; |
| break; |
| |
| case bp_catch_fork: |
| annotate_catchpoint (bs->breakpoint_at->number); |
| printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); |
| printf_filtered ("forked"); |
| printf_filtered (" process %d), ", |
| bs->breakpoint_at->forked_inferior_pid); |
| return PRINT_SRC_AND_LOC; |
| break; |
| |
| case bp_catch_vfork: |
| annotate_catchpoint (bs->breakpoint_at->number); |
| printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); |
| printf_filtered ("vforked"); |
| printf_filtered (" process %d), ", |
| bs->breakpoint_at->forked_inferior_pid); |
| return PRINT_SRC_AND_LOC; |
| break; |
| |
| case bp_catch_exec: |
| annotate_catchpoint (bs->breakpoint_at->number); |
| printf_filtered ("\nCatchpoint %d (exec'd %s), ", |
| bs->breakpoint_at->number, |
| bs->breakpoint_at->exec_pathname); |
| return PRINT_SRC_AND_LOC; |
| break; |
| |
| case bp_catch_catch: |
| if (current_exception_event && |
| (CURRENT_EXCEPTION_KIND == EX_EVENT_CATCH)) |
| { |
| annotate_catchpoint (bs->breakpoint_at->number); |
| printf_filtered ("\nCatchpoint %d (exception caught), ", |
| bs->breakpoint_at->number); |
| printf_filtered ("throw location "); |
| if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE) |
| printf_filtered ("%s:%d", |
| CURRENT_EXCEPTION_THROW_FILE, |
| CURRENT_EXCEPTION_THROW_LINE); |
| else |
| printf_filtered ("unknown"); |
| |
| printf_filtered (", catch location "); |
| if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE) |
| printf_filtered ("%s:%d", |
| CURRENT_EXCEPTION_CATCH_FILE, |
| CURRENT_EXCEPTION_CATCH_LINE); |
| else |
| printf_filtered ("unknown"); |
| |
| printf_filtered ("\n"); |
| /* don't bother to print location frame info */ |
| return PRINT_SRC_ONLY; |
| } |
| else |
| { |
| /* really throw, some other bpstat will handle it */ |
| return PRINT_UNKNOWN; |
| } |
| break; |
| |
| case bp_catch_throw: |
| if (current_exception_event && |
| (CURRENT_EXCEPTION_KIND == EX_EVENT_THROW)) |
| { |
| annotate_catchpoint (bs->breakpoint_at->number); |
| printf_filtered ("\nCatchpoint %d (exception thrown), ", |
| bs->breakpoint_at->number); |
| printf_filtered ("throw location "); |
| if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE) |
| printf_filtered ("%s:%d", |
| CURRENT_EXCEPTION_THROW_FILE, |
| CURRENT_EXCEPTION_THROW_LINE); |
| else |
| printf_filtered ("unknown"); |
| |
| printf_filtered (", catch location "); |
| if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE) |
| printf_filtered ("%s:%d", |
| CURRENT_EXCEPTION_CATCH_FILE, |
| CURRENT_EXCEPTION_CATCH_LINE); |
| else |
| printf_filtered ("unknown"); |
| |
| printf_filtered ("\n"); |
| /* don't bother to print location frame info */ |
| return PRINT_SRC_ONLY; |
| } |
| else |
| { |
| /* really catch, some other bpstat will handle it */ |
| return PRINT_UNKNOWN; |
| } |
| break; |
| |
| case bp_watchpoint: |
| case bp_hardware_watchpoint: |
| if (bs->old_val != NULL) |
| { |
| annotate_watchpoint (bs->breakpoint_at->number); |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string (uiout, "reason", "watchpoint-trigger"); |
| mention (bs->breakpoint_at); |
| ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value"); |
| ui_out_text (uiout, "\nOld value = "); |
| value_print (bs->old_val, stb->stream, 0, Val_pretty_default); |
| ui_out_field_stream (uiout, "old", stb); |
| ui_out_text (uiout, "\nNew value = "); |
| value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default); |
| ui_out_field_stream (uiout, "new", stb); |
| do_cleanups (ui_out_chain); |
| ui_out_text (uiout, "\n"); |
| value_free (bs->old_val); |
| bs->old_val = NULL; |
| } |
| /* More than one watchpoint may have been triggered. */ |
| return PRINT_UNKNOWN; |
| break; |
| |
| case bp_read_watchpoint: |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string (uiout, "reason", "read-watchpoint-trigger"); |
| mention (bs->breakpoint_at); |
| ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value"); |
| ui_out_text (uiout, "\nValue = "); |
| value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default); |
| ui_out_field_stream (uiout, "value", stb); |
| do_cleanups (ui_out_chain); |
| ui_out_text (uiout, "\n"); |
| return PRINT_UNKNOWN; |
| break; |
| |
| case bp_access_watchpoint: |
| if (bs->old_val != NULL) |
| { |
| annotate_watchpoint (bs->breakpoint_at->number); |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string (uiout, "reason", "access-watchpoint-trigger"); |
| mention (bs->breakpoint_at); |
| ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value"); |
| ui_out_text (uiout, "\nOld value = "); |
| value_print (bs->old_val, stb->stream, 0, Val_pretty_default); |
| ui_out_field_stream (uiout, "old", stb); |
| value_free (bs->old_val); |
| bs->old_val = NULL; |
| ui_out_text (uiout, "\nNew value = "); |
| } |
| else |
| { |
| mention (bs->breakpoint_at); |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string (uiout, "reason", "access-watchpoint-trigger"); |
| ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value"); |
| ui_out_text (uiout, "\nValue = "); |
| } |
| value_print (bs->breakpoint_at->val, stb->stream, 0,Val_pretty_default); |
| ui_out_field_stream (uiout, "new", stb); |
| do_cleanups (ui_out_chain); |
| ui_out_text (uiout, "\n"); |
| return PRINT_UNKNOWN; |
| break; |
| |
| /* Fall through, we don't deal with these types of breakpoints |
| here. */ |
| |
| case bp_finish: |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string (uiout, "reason", "function-finished"); |
| return PRINT_UNKNOWN; |
| break; |
| |
| case bp_until: |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string (uiout, "reason", "location-reached"); |
| return PRINT_UNKNOWN; |
| break; |
| |
| case bp_none: |
| case bp_longjmp: |
| case bp_longjmp_resume: |
| case bp_step_resume: |
| case bp_through_sigtramp: |
| case bp_watchpoint_scope: |
| case bp_call_dummy: |
| default: |
| return PRINT_UNKNOWN; |
| } |
| } |
| |
| /* Generic routine for printing messages indicating why we |
| stopped. The behavior of this function depends on the value |
| 'print_it' in the bpstat structure. Under some circumstances we |
| may decide not to print anything here and delegate the task to |
| normal_stop(). */ |
| |
| static enum print_stop_action |
| print_bp_stop_message (bpstat bs) |
| { |
| switch (bs->print_it) |
| { |
| case print_it_noop: |
| /* Nothing should be printed for this bpstat entry. */ |
| return PRINT_UNKNOWN; |
| break; |
| |
| case print_it_done: |
| /* We still want to print the frame, but we already printed the |
| relevant messages. */ |
| return PRINT_SRC_AND_LOC; |
| break; |
| |
| case print_it_normal: |
| /* Normal case, we handle everything in print_it_typical. */ |
| return print_it_typical (bs); |
| break; |
| default: |
| internal_error (__FILE__, __LINE__, |
| "print_bp_stop_message: unrecognized enum value"); |
| break; |
| } |
| } |
| |
| /* Print a message indicating what happened. This is called from |
| normal_stop(). The input to this routine is the head of the bpstat |
| list - a list of the eventpoints that caused this stop. This |
| routine calls the generic print routine for printing a message |
| about reasons for stopping. This will print (for example) the |
| "Breakpoint n," part of the output. The return value of this |
| routine is one of: |
| |
| PRINT_UNKNOWN: Means we printed nothing |
| PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent |
| code to print the location. An example is |
| "Breakpoint 1, " which should be followed by |
| the location. |
| PRINT_SRC_ONLY: Means we printed something, but there is no need |
| to also print the location part of the message. |
| An example is the catch/throw messages, which |
| don't require a location appended to the end. |
| PRINT_NOTHING: We have done some printing and we don't need any |
| further info to be printed.*/ |
| |
| enum print_stop_action |
| bpstat_print (bpstat bs) |
| { |
| int val; |
| |
| /* Maybe another breakpoint in the chain caused us to stop. |
| (Currently all watchpoints go on the bpstat whether hit or not. |
| That probably could (should) be changed, provided care is taken |
| with respect to bpstat_explains_signal). */ |
| for (; bs; bs = bs->next) |
| { |
| val = print_bp_stop_message (bs); |
| if (val == PRINT_SRC_ONLY |
| || val == PRINT_SRC_AND_LOC |
| || val == PRINT_NOTHING) |
| return val; |
| } |
| |
| /* We reached the end of the chain, or we got a null BS to start |
| with and nothing was printed. */ |
| return PRINT_UNKNOWN; |
| } |
| |
| /* Evaluate the expression EXP and return 1 if value is zero. |
| This is used inside a catch_errors to evaluate the breakpoint condition. |
| The argument is a "struct expression *" that has been cast to char * to |
| make it pass through catch_errors. */ |
| |
| static int |
| breakpoint_cond_eval (void *exp) |
| { |
| struct value *mark = value_mark (); |
| int i = !value_true (evaluate_expression ((struct expression *) exp)); |
| value_free_to_mark (mark); |
| return i; |
| } |
| |
| /* Allocate a new bpstat and chain it to the current one. */ |
| |
| static bpstat |
| bpstat_alloc (struct breakpoint *b, bpstat cbs /* Current "bs" value */ ) |
| { |
| bpstat bs; |
| |
| bs = (bpstat) xmalloc (sizeof (*bs)); |
| cbs->next = bs; |
| bs->breakpoint_at = b; |
| /* If the condition is false, etc., don't do the commands. */ |
| bs->commands = NULL; |
| bs->old_val = NULL; |
| bs->print_it = print_it_normal; |
| return bs; |
| } |
| |
| /* Possible return values for watchpoint_check (this can't be an enum |
| because of check_errors). */ |
| /* The watchpoint has been deleted. */ |
| #define WP_DELETED 1 |
| /* The value has changed. */ |
| #define WP_VALUE_CHANGED 2 |
| /* The value has not changed. */ |
| #define WP_VALUE_NOT_CHANGED 3 |
| |
| #define BP_TEMPFLAG 1 |
| #define BP_HARDWAREFLAG 2 |
| |
| /* Check watchpoint condition. */ |
| |
| static int |
| watchpoint_check (void *p) |
| { |
| bpstat bs = (bpstat) p; |
| struct breakpoint *b; |
| struct frame_info *fr; |
| int within_current_scope; |
| |
| b = bs->breakpoint_at; |
| |
| if (b->exp_valid_block == NULL) |
| within_current_scope = 1; |
| else |
| { |
| /* There is no current frame at this moment. If we're going to have |
| any chance of handling watchpoints on local variables, we'll need |
| the frame chain (so we can determine if we're in scope). */ |
| reinit_frame_cache (); |
| fr = frame_find_by_id (b->watchpoint_frame); |
| within_current_scope = (fr != NULL); |
| /* in_function_epilogue_p() returns a non-zero value if we're still |
| in the function but the stack frame has already been invalidated. |
| Since we can't rely on the values of local variables after the |
| stack has been destroyed, we are treating the watchpoint in that |
| state as `not changed' without further checking. */ |
| if (within_current_scope && fr == get_current_frame () |
| && gdbarch_in_function_epilogue_p (current_gdbarch, read_pc ())) |
| return WP_VALUE_NOT_CHANGED; |
| if (within_current_scope) |
| /* If we end up stopping, the current frame will get selected |
| in normal_stop. So this call to select_frame won't affect |
| the user. */ |
| select_frame (fr); |
| } |
| |
| if (within_current_scope) |
| { |
| /* We use value_{,free_to_}mark because it could be a |
| *long* time before we return to the command level and |
| call free_all_values. We can't call free_all_values because |
| we might be in the middle of evaluating a function call. */ |
| |
| struct value *mark = value_mark (); |
| struct value *new_val = evaluate_expression (bs->breakpoint_at->exp); |
| if (!value_equal (b->val, new_val)) |
| { |
| release_value (new_val); |
| value_free_to_mark (mark); |
| bs->old_val = b->val; |
| b->val = new_val; |
| /* We will stop here */ |
| return WP_VALUE_CHANGED; |
| } |
| else |
| { |
| /* Nothing changed, don't do anything. */ |
| value_free_to_mark (mark); |
| /* We won't stop here */ |
| return WP_VALUE_NOT_CHANGED; |
| } |
| } |
| else |
| { |
| /* This seems like the only logical thing to do because |
| if we temporarily ignored the watchpoint, then when |
| we reenter the block in which it is valid it contains |
| garbage (in the case of a function, it may have two |
| garbage values, one before and one after the prologue). |
| So we can't even detect the first assignment to it and |
| watch after that (since the garbage may or may not equal |
| the first value assigned). */ |
| /* We print all the stop information in print_it_typical(), but |
| in this case, by the time we call print_it_typical() this bp |
| will be deleted already. So we have no choice but print the |
| information here. */ |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string (uiout, "reason", "watchpoint-scope"); |
| ui_out_text (uiout, "\nWatchpoint "); |
| ui_out_field_int (uiout, "wpnum", bs->breakpoint_at->number); |
| ui_out_text (uiout, " deleted because the program has left the block in\n\ |
| which its expression is valid.\n"); |
| |
| if (b->related_breakpoint) |
| b->related_breakpoint->disposition = disp_del_at_next_stop; |
| b->disposition = disp_del_at_next_stop; |
| |
| return WP_DELETED; |
| } |
| } |
| |
| /* Get a bpstat associated with having just stopped at address *PC |
| and frame address CORE_ADDRESS. Update *PC to point at the |
| breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero |
| if this is known to not be a real breakpoint (it could still be a |
| watchpoint, though). */ |
| |
| /* Determine whether we stopped at a breakpoint, etc, or whether we |
| don't understand this stop. Result is a chain of bpstat's such that: |
| |
| if we don't understand the stop, the result is a null pointer. |
| |
| if we understand why we stopped, the result is not null. |
| |
| Each element of the chain refers to a particular breakpoint or |
| watchpoint at which we have stopped. (We may have stopped for |
| several reasons concurrently.) |
| |
| Each element of the chain has valid next, breakpoint_at, |
| commands, FIXME??? fields. */ |
| |
| bpstat |
| bpstat_stop_status (CORE_ADDR *pc, int not_a_sw_breakpoint) |
| { |
| register struct breakpoint *b, *temp; |
| CORE_ADDR bp_addr; |
| /* True if we've hit a breakpoint (as opposed to a watchpoint). */ |
| int real_breakpoint = 0; |
| /* Root of the chain of bpstat's */ |
| struct bpstats root_bs[1]; |
| /* Pointer to the last thing in the chain currently. */ |
| bpstat bs = root_bs; |
| static char message1[] = |
| "Error evaluating expression for watchpoint %d\n"; |
| char message[sizeof (message1) + 30 /* slop */ ]; |
| |
| /* Get the address where the breakpoint would have been. The |
| "not_a_sw_breakpoint" argument is meant to distinguish between a |
| breakpoint trap event and a trace/singlestep trap event. For a |
| trace/singlestep trap event, we would not want to subtract |
| DECR_PC_AFTER_BREAK from the PC. */ |
| |
| bp_addr = *pc - (not_a_sw_breakpoint ? 0 : DECR_PC_AFTER_BREAK); |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| if (b->enable_state == bp_disabled |
| || b->enable_state == bp_shlib_disabled |
| || b->enable_state == bp_call_disabled) |
| continue; |
| |
| if (b->type != bp_watchpoint |
| && b->type != bp_hardware_watchpoint |
| && b->type != bp_read_watchpoint |
| && b->type != bp_access_watchpoint |
| && b->type != bp_hardware_breakpoint |
| && b->type != bp_catch_fork |
| && b->type != bp_catch_vfork |
| && b->type != bp_catch_exec |
| && b->type != bp_catch_catch |
| && b->type != bp_catch_throw) /* a non-watchpoint bp */ |
| { |
| if (b->address != bp_addr) /* address doesn't match */ |
| continue; |
| if (overlay_debugging /* unmapped overlay section */ |
| && section_is_overlay (b->section) |
| && !section_is_mapped (b->section)) |
| continue; |
| } |
| |
| if (b->type == bp_hardware_breakpoint) |
| { |
| if (b->address != (*pc - DECR_PC_AFTER_HW_BREAK)) |
| continue; |
| if (overlay_debugging /* unmapped overlay section */ |
| && section_is_overlay (b->section) |
| && !section_is_mapped (b->section)) |
| continue; |
| } |
| |
| /* Is this a catchpoint of a load or unload? If so, did we |
| get a load or unload of the specified library? If not, |
| ignore it. */ |
| if ((b->type == bp_catch_load) |
| #if defined(SOLIB_HAVE_LOAD_EVENT) |
| && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid)) |
| || ((b->dll_pathname != NULL) |
| && (strcmp (b->dll_pathname, |
| SOLIB_LOADED_LIBRARY_PATHNAME ( |
| PIDGET (inferior_ptid))) |
| != 0))) |
| #endif |
| ) |
| continue; |
| |
| if ((b->type == bp_catch_unload) |
| #if defined(SOLIB_HAVE_UNLOAD_EVENT) |
| && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid)) |
| || ((b->dll_pathname != NULL) |
| && (strcmp (b->dll_pathname, |
| SOLIB_UNLOADED_LIBRARY_PATHNAME ( |
| PIDGET (inferior_ptid))) |
| != 0))) |
| #endif |
| ) |
| continue; |
| |
| if ((b->type == bp_catch_fork) |
| && !inferior_has_forked (PIDGET (inferior_ptid), |
| &b->forked_inferior_pid)) |
| continue; |
| |
| if ((b->type == bp_catch_vfork) |
| && !inferior_has_vforked (PIDGET (inferior_ptid), |
| &b->forked_inferior_pid)) |
| continue; |
| |
| if ((b->type == bp_catch_exec) |
| && !inferior_has_execd (PIDGET (inferior_ptid), &b->exec_pathname)) |
| continue; |
| |
| if (ep_is_exception_catchpoint (b) && |
| !(current_exception_event = target_get_current_exception_event ())) |
| continue; |
| |
| /* Come here if it's a watchpoint, or if the break address matches */ |
| |
| bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */ |
| |
| /* Watchpoints may change this, if not found to have triggered. */ |
| bs->stop = 1; |
| bs->print = 1; |
| |
| sprintf (message, message1, b->number); |
| if (b->type == bp_watchpoint || |
| b->type == bp_hardware_watchpoint) |
| { |
| switch (catch_errors (watchpoint_check, bs, message, |
| RETURN_MASK_ALL)) |
| { |
| case WP_DELETED: |
| /* We've already printed what needs to be printed. */ |
| /* Actually this is superfluous, because by the time we |
| call print_it_typical() the wp will be already deleted, |
| and the function will return immediately. */ |
| bs->print_it = print_it_done; |
| /* Stop. */ |
| break; |
| case WP_VALUE_CHANGED: |
| /* Stop. */ |
| ++(b->hit_count); |
| break; |
| case WP_VALUE_NOT_CHANGED: |
| /* Don't stop. */ |
| bs->print_it = print_it_noop; |
| bs->stop = 0; |
| continue; |
| default: |
| /* Can't happen. */ |
| /* FALLTHROUGH */ |
| case 0: |
| /* Error from catch_errors. */ |
| printf_filtered ("Watchpoint %d deleted.\n", b->number); |
| if (b->related_breakpoint) |
| b->related_breakpoint->disposition = disp_del_at_next_stop; |
| b->disposition = disp_del_at_next_stop; |
| /* We've already printed what needs to be printed. */ |
| bs->print_it = print_it_done; |
| |
| /* Stop. */ |
| break; |
| } |
| } |
| else if (b->type == bp_read_watchpoint || |
| b->type == bp_access_watchpoint) |
| { |
| CORE_ADDR addr; |
| struct value *v; |
| int found = 0; |
| |
| addr = target_stopped_data_address (); |
| if (addr == 0) |
| continue; |
| for (v = b->val_chain; v; v = v->next) |
| { |
| if (VALUE_LVAL (v) == lval_memory |
| && ! VALUE_LAZY (v)) |
| { |
| struct type *vtype = check_typedef (VALUE_TYPE (v)); |
| |
| if (v == b->val_chain |
| || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT |
| && TYPE_CODE (vtype) != TYPE_CODE_ARRAY)) |
| { |
| CORE_ADDR vaddr; |
| |
| vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); |
| /* Exact match not required. Within range is |
| sufficient. */ |
| if (addr >= vaddr && |
| addr < vaddr + TYPE_LENGTH (VALUE_TYPE (v))) |
| found = 1; |
| } |
| } |
| } |
| if (found) |
| switch (catch_errors (watchpoint_check, bs, message, |
| RETURN_MASK_ALL)) |
| { |
| case WP_DELETED: |
| /* We've already printed what needs to be printed. */ |
| bs->print_it = print_it_done; |
| /* Stop. */ |
| break; |
| case WP_VALUE_CHANGED: |
| if (b->type == bp_read_watchpoint) |
| { |
| /* Don't stop: read watchpoints shouldn't fire if |
| the value has changed. This is for targets which |
| cannot set read-only watchpoints. */ |
| bs->print_it = print_it_noop; |
| bs->stop = 0; |
| continue; |
| } |
| ++(b->hit_count); |
| break; |
| case WP_VALUE_NOT_CHANGED: |
| /* Stop. */ |
| ++(b->hit_count); |
| break; |
| default: |
| /* Can't happen. */ |
| case 0: |
| /* Error from catch_errors. */ |
| printf_filtered ("Watchpoint %d deleted.\n", b->number); |
| if (b->related_breakpoint) |
| b->related_breakpoint->disposition = disp_del_at_next_stop; |
| b->disposition = disp_del_at_next_stop; |
| /* We've already printed what needs to be printed. */ |
| bs->print_it = print_it_done; |
| break; |
| } |
| else /* found == 0 */ |
| { |
| /* This is a case where some watchpoint(s) triggered, |
| but not at the address of this watchpoint (FOUND |
| was left zero). So don't print anything for this |
| watchpoint. */ |
| bs->print_it = print_it_noop; |
| bs->stop = 0; |
| continue; |
| } |
| } |
| else |
| { |
| /* By definition, an encountered breakpoint is a triggered |
| breakpoint. */ |
| ++(b->hit_count); |
| |
| real_breakpoint = 1; |
| } |
| |
| if (frame_id_p (b->frame_id) |
| && !frame_id_eq (b->frame_id, get_frame_id (get_current_frame ()))) |
| bs->stop = 0; |
| else |
| { |
| int value_is_zero = 0; |
| |
| if (b->cond) |
| { |
| /* Need to select the frame, with all that implies |
| so that the conditions will have the right context. */ |
| select_frame (get_current_frame ()); |
| value_is_zero |
| = catch_errors (breakpoint_cond_eval, (b->cond), |
| "Error in testing breakpoint condition:\n", |
| RETURN_MASK_ALL); |
| /* FIXME-someday, should give breakpoint # */ |
| free_all_values (); |
| } |
| if (b->cond && value_is_zero) |
| { |
| bs->stop = 0; |
| /* Don't consider this a hit. */ |
| --(b->hit_count); |
| } |
| else if (b->ignore_count > 0) |
| { |
| b->ignore_count--; |
| annotate_ignore_count_change (); |
| bs->stop = 0; |
| } |
| else |
| { |
| /* We will stop here */ |
| if (b->disposition == disp_disable) |
| b->enable_state = bp_disabled; |
| bs->commands = copy_command_lines (b->commands); |
| if (b->silent) |
| bs->print = 0; |
| if (bs->commands && |
| (STREQ ("silent", bs->commands->line) || |
| (xdb_commands && STREQ ("Q", bs->commands->line)))) |
| { |
| bs->commands = bs->commands->next; |
| bs->print = 0; |
| } |
| } |
| } |
| /* Print nothing for this entry if we dont stop or if we dont print. */ |
| if (bs->stop == 0 || bs->print == 0) |
| bs->print_it = print_it_noop; |
| } |
| |
| bs->next = NULL; /* Terminate the chain */ |
| bs = root_bs->next; /* Re-grab the head of the chain */ |
| |
| if (real_breakpoint && bs) |
| { |
| if (bs->breakpoint_at->type == bp_hardware_breakpoint) |
| { |
| if (DECR_PC_AFTER_HW_BREAK != 0) |
| { |
| *pc = *pc - DECR_PC_AFTER_HW_BREAK; |
| write_pc (*pc); |
| } |
| } |
| else |
| { |
| if (DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs) |
| { |
| *pc = bp_addr; |
| #if defined (SHIFT_INST_REGS) |
| SHIFT_INST_REGS (); |
| #else /* No SHIFT_INST_REGS. */ |
| write_pc (bp_addr); |
| #endif /* No SHIFT_INST_REGS. */ |
| } |
| } |
| } |
| |
| /* The value of a hardware watchpoint hasn't changed, but the |
| intermediate memory locations we are watching may have. */ |
| if (bs && !bs->stop && |
| (bs->breakpoint_at->type == bp_hardware_watchpoint || |
| bs->breakpoint_at->type == bp_read_watchpoint || |
| bs->breakpoint_at->type == bp_access_watchpoint)) |
| { |
| remove_breakpoints (); |
| insert_breakpoints (); |
| } |
| return bs; |
| } |
| |
| /* Tell what to do about this bpstat. */ |
| struct bpstat_what |
| bpstat_what (bpstat bs) |
| { |
| /* Classify each bpstat as one of the following. */ |
| enum class |
| { |
| /* This bpstat element has no effect on the main_action. */ |
| no_effect = 0, |
| |
| /* There was a watchpoint, stop but don't print. */ |
| wp_silent, |
| |
| /* There was a watchpoint, stop and print. */ |
| wp_noisy, |
| |
| /* There was a breakpoint but we're not stopping. */ |
| bp_nostop, |
| |
| /* There was a breakpoint, stop but don't print. */ |
| bp_silent, |
| |
| /* There was a breakpoint, stop and print. */ |
| bp_noisy, |
| |
| /* We hit the longjmp breakpoint. */ |
| long_jump, |
| |
| /* We hit the longjmp_resume breakpoint. */ |
| long_resume, |
| |
| /* We hit the step_resume breakpoint. */ |
| step_resume, |
| |
| /* We hit the through_sigtramp breakpoint. */ |
| through_sig, |
| |
| /* We hit the shared library event breakpoint. */ |
| shlib_event, |
| |
| /* We caught a shared library event. */ |
| catch_shlib_event, |
| |
| /* This is just used to count how many enums there are. */ |
| class_last |
| }; |
| |
| /* Here is the table which drives this routine. So that we can |
| format it pretty, we define some abbreviations for the |
| enum bpstat_what codes. */ |
| #define kc BPSTAT_WHAT_KEEP_CHECKING |
| #define ss BPSTAT_WHAT_STOP_SILENT |
| #define sn BPSTAT_WHAT_STOP_NOISY |
| #define sgl BPSTAT_WHAT_SINGLE |
| #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME |
| #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME |
| #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE |
| #define sr BPSTAT_WHAT_STEP_RESUME |
| #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP |
| #define shl BPSTAT_WHAT_CHECK_SHLIBS |
| #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK |
| |
| /* "Can't happen." Might want to print an error message. |
| abort() is not out of the question, but chances are GDB is just |
| a bit confused, not unusable. */ |
| #define err BPSTAT_WHAT_STOP_NOISY |
| |
| /* Given an old action and a class, come up with a new action. */ |
| /* One interesting property of this table is that wp_silent is the same |
| as bp_silent and wp_noisy is the same as bp_noisy. That is because |
| after stopping, the check for whether to step over a breakpoint |
| (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without |
| reference to how we stopped. We retain separate wp_silent and |
| bp_silent codes in case we want to change that someday. |
| |
| Another possibly interesting property of this table is that |
| there's a partial ordering, priority-like, of the actions. Once |
| you've decided that some action is appropriate, you'll never go |
| back and decide something of a lower priority is better. The |
| ordering is: |
| |
| kc < clr sgl shl shlr slr sn sr ss ts |
| sgl < clrs shl shlr slr sn sr ss ts |
| slr < err shl shlr sn sr ss ts |
| clr < clrs err shl shlr sn sr ss ts |
| clrs < err shl shlr sn sr ss ts |
| ss < shl shlr sn sr ts |
| sn < shl shlr sr ts |
| sr < shl shlr ts |
| shl < shlr |
| ts < |
| shlr < |
| |
| What I think this means is that we don't need a damned table |
| here. If you just put the rows and columns in the right order, |
| it'd look awfully regular. We could simply walk the bpstat list |
| and choose the highest priority action we find, with a little |
| logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/ |
| CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says |
| is messy anyway). */ |
| |
| /* step_resume entries: a step resume breakpoint overrides another |
| breakpoint of signal handling (see comment in wait_for_inferior |
| at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */ |
| /* We handle the through_sigtramp_breakpoint the same way; having both |
| one of those and a step_resume_breakpoint is probably very rare (?). */ |
| |
| static const enum bpstat_what_main_action |
| table[(int) class_last][(int) BPSTAT_WHAT_LAST] = |
| { |
| /* old action */ |
| /* kc ss sn sgl slr clr clrs sr ts shl shlr |
| */ |
| /*no_effect */ |
| {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr}, |
| /*wp_silent */ |
| {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr}, |
| /*wp_noisy */ |
| {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr}, |
| /*bp_nostop */ |
| {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr}, |
| /*bp_silent */ |
| {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr}, |
| /*bp_noisy */ |
| {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr}, |
| /*long_jump */ |
| {slr, ss, sn, slr, slr, err, err, sr, ts, shl, shlr}, |
| /*long_resume */ |
| {clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr}, |
| /*step_resume */ |
| {sr, sr, sr, sr, sr, sr, sr, sr, ts, shl, shlr}, |
| /*through_sig */ |
| {ts, ts, ts, ts, ts, ts, ts, ts, ts, shl, shlr}, |
| /*shlib */ |
| {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr}, |
| /*catch_shlib */ |
| {shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr} |
| }; |
| |
| #undef kc |
| #undef ss |
| #undef sn |
| #undef sgl |
| #undef slr |
| #undef clr |
| #undef clrs |
| #undef err |
| #undef sr |
| #undef ts |
| #undef shl |
| #undef shlr |
| enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING; |
| struct bpstat_what retval; |
| |
| retval.call_dummy = 0; |
| for (; bs != NULL; bs = bs->next) |
| { |
| enum class bs_class = no_effect; |
| if (bs->breakpoint_at == NULL) |
| /* I suspect this can happen if it was a momentary breakpoint |
| which has since been deleted. */ |
| continue; |
| switch (bs->breakpoint_at->type) |
| { |
| case bp_none: |
| continue; |
| |
| case bp_breakpoint: |
| case bp_hardware_breakpoint: |
| case bp_until: |
| case bp_finish: |
| if (bs->stop) |
| { |
| if (bs->print) |
| bs_class = bp_noisy; |
| else |
| bs_class = bp_silent; |
| } |
| else |
| bs_class = bp_nostop; |
| break; |
| case bp_watchpoint: |
| case bp_hardware_watchpoint: |
| case bp_read_watchpoint: |
| case bp_access_watchpoint: |
| if (bs->stop) |
| { |
| if (bs->print) |
| bs_class = wp_noisy; |
| else |
| bs_class = wp_silent; |
| } |
| else |
| /* There was a watchpoint, but we're not stopping. |
| This requires no further action. */ |
| bs_class = no_effect; |
| break; |
| case bp_longjmp: |
| bs_class = long_jump; |
| break; |
| case bp_longjmp_resume: |
| bs_class = long_resume; |
| break; |
| case bp_step_resume: |
| if (bs->stop) |
| { |
| bs_class = step_resume; |
| } |
| else |
| /* It is for the wrong frame. */ |
| bs_class = bp_nostop; |
| break; |
| case bp_through_sigtramp: |
| bs_class = through_sig; |
| break; |
| case bp_watchpoint_scope: |
| bs_class = bp_nostop; |
| break; |
| case bp_shlib_event: |
| bs_class = shlib_event; |
| break; |
| case bp_thread_event: |
| case bp_overlay_event: |
| bs_class = bp_nostop; |
| break; |
| case bp_catch_load: |
| case bp_catch_unload: |
| /* Only if this catchpoint triggered should we cause the |
| step-out-of-dld behaviour. Otherwise, we ignore this |
| catchpoint. */ |
| if (bs->stop) |
| bs_class = catch_shlib_event; |
| else |
| bs_class = no_effect; |
| break; |
| case bp_catch_fork: |
| case bp_catch_vfork: |
| case bp_catch_exec: |
| if (bs->stop) |
| { |
| if (bs->print) |
| bs_class = bp_noisy; |
| else |
| bs_class = bp_silent; |
| } |
| else |
| /* There was a catchpoint, but we're not stopping. |
| This requires no further action. */ |
| bs_class = no_effect; |
| break; |
| case bp_catch_catch: |
| if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_CATCH) |
| bs_class = bp_nostop; |
| else if (bs->stop) |
| bs_class = bs->print ? bp_noisy : bp_silent; |
| break; |
| case bp_catch_throw: |
| if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_THROW) |
| bs_class = bp_nostop; |
| else if (bs->stop) |
| bs_class = bs->print ? bp_noisy : bp_silent; |
| break; |
| case bp_call_dummy: |
| /* Make sure the action is stop (silent or noisy), |
| so infrun.c pops the dummy frame. */ |
| bs_class = bp_silent; |
| retval.call_dummy = 1; |
| break; |
| } |
| current_action = table[(int) bs_class][(int) current_action]; |
| } |
| retval.main_action = current_action; |
| return retval; |
| } |
| |
| /* Nonzero if we should step constantly (e.g. watchpoints on machines |
| without hardware support). This isn't related to a specific bpstat, |
| just to things like whether watchpoints are set. */ |
| |
| int |
| bpstat_should_step (void) |
| { |
| struct breakpoint *b; |
| ALL_BREAKPOINTS (b) |
| if (b->enable_state == bp_enabled && b->type == bp_watchpoint) |
| return 1; |
| return 0; |
| } |
| |
| /* Nonzero if there are enabled hardware watchpoints. */ |
| int |
| bpstat_have_active_hw_watchpoints (void) |
| { |
| struct breakpoint *b; |
| ALL_BREAKPOINTS (b) |
| if ((b->enable_state == bp_enabled) && |
| (b->inserted) && |
| ((b->type == bp_hardware_watchpoint) || |
| (b->type == bp_read_watchpoint) || |
| (b->type == bp_access_watchpoint))) |
| return 1; |
| return 0; |
| } |
| |
| |
| /* Given a bpstat that records zero or more triggered eventpoints, this |
| function returns another bpstat which contains only the catchpoints |
| on that first list, if any. */ |
| void |
| bpstat_get_triggered_catchpoints (bpstat ep_list, bpstat *cp_list) |
| { |
| struct bpstats root_bs[1]; |
| bpstat bs = root_bs; |
| struct breakpoint *ep; |
| char *dll_pathname; |
| |
| bpstat_clear (cp_list); |
| root_bs->next = NULL; |
| |
| for (; ep_list != NULL; ep_list = ep_list->next) |
| { |
| /* Is this eventpoint a catchpoint? If not, ignore it. */ |
| ep = ep_list->breakpoint_at; |
| if (ep == NULL) |
| break; |
| if ((ep->type != bp_catch_load) && |
| (ep->type != bp_catch_unload) && |
| (ep->type != bp_catch_catch) && |
| (ep->type != bp_catch_throw)) |
| /* pai: (temp) ADD fork/vfork here!! */ |
| continue; |
| |
| /* Yes; add it to the list. */ |
| bs = bpstat_alloc (ep, bs); |
| *bs = *ep_list; |
| bs->next = NULL; |
| bs = root_bs->next; |
| |
| #if defined(SOLIB_ADD) |
| /* Also, for each triggered catchpoint, tag it with the name of |
| the library that caused this trigger. (We copy the name now, |
| because it's only guaranteed to be available NOW, when the |
| catchpoint triggers. Clients who may wish to know the name |
| later must get it from the catchpoint itself.) */ |
| if (ep->triggered_dll_pathname != NULL) |
| xfree (ep->triggered_dll_pathname); |
| if (ep->type == bp_catch_load) |
| dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME ( |
| PIDGET (inferior_ptid)); |
| else |
| dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME ( |
| PIDGET (inferior_ptid)); |
| #else |
| dll_pathname = NULL; |
| #endif |
| if (dll_pathname) |
| { |
| ep->triggered_dll_pathname = (char *) |
| xmalloc (strlen (dll_pathname) + 1); |
| strcpy (ep->triggered_dll_pathname, dll_pathname); |
| } |
| else |
| ep->triggered_dll_pathname = NULL; |
| } |
| |
| *cp_list = bs; |
| } |
| |
| /* Print B to gdb_stdout. */ |
| static void |
| print_one_breakpoint (struct breakpoint *b, |
| CORE_ADDR *last_addr) |
| { |
| register struct command_line *l; |
| register struct symbol *sym; |
| struct ep_type_description |
| { |
| enum bptype type; |
| char *description; |
| }; |
| static struct ep_type_description bptypes[] = |
| { |
| {bp_none, "?deleted?"}, |
| {bp_breakpoint, "breakpoint"}, |
| {bp_hardware_breakpoint, "hw breakpoint"}, |
| {bp_until, "until"}, |
| {bp_finish, "finish"}, |
| {bp_watchpoint, "watchpoint"}, |
| {bp_hardware_watchpoint, "hw watchpoint"}, |
| {bp_read_watchpoint, "read watchpoint"}, |
| {bp_access_watchpoint, "acc watchpoint"}, |
| {bp_longjmp, "longjmp"}, |
| {bp_longjmp_resume, "longjmp resume"}, |
| {bp_step_resume, "step resume"}, |
| {bp_through_sigtramp, "sigtramp"}, |
| {bp_watchpoint_scope, "watchpoint scope"}, |
| {bp_call_dummy, "call dummy"}, |
| {bp_shlib_event, "shlib events"}, |
| {bp_thread_event, "thread events"}, |
| {bp_overlay_event, "overlay events"}, |
| {bp_catch_load, "catch load"}, |
| {bp_catch_unload, "catch unload"}, |
| {bp_catch_fork, "catch fork"}, |
| {bp_catch_vfork, "catch vfork"}, |
| {bp_catch_exec, "catch exec"}, |
| {bp_catch_catch, "catch catch"}, |
| {bp_catch_throw, "catch throw"} |
| }; |
| |
| static char *bpdisps[] = |
| {"del", "dstp", "dis", "keep"}; |
| static char bpenables[] = "nynny"; |
| char wrap_indent[80]; |
| struct ui_stream *stb = ui_out_stream_new (uiout); |
| struct cleanup *old_chain = make_cleanup_ui_out_stream_delete (stb); |
| struct cleanup *bkpt_chain; |
| |
| annotate_record (); |
| bkpt_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "bkpt"); |
| |
| /* 1 */ |
| annotate_field (0); |
| ui_out_field_int (uiout, "number", b->number); |
| |
| /* 2 */ |
| annotate_field (1); |
| if (((int) b->type > (sizeof (bptypes) / sizeof (bptypes[0]))) |
| || ((int) b->type != bptypes[(int) b->type].type)) |
| internal_error (__FILE__, __LINE__, |
| "bptypes table does not describe type #%d.", |
| (int) b->type); |
| ui_out_field_string (uiout, "type", bptypes[(int) b->type].description); |
| |
| /* 3 */ |
| annotate_field (2); |
| ui_out_field_string (uiout, "disp", bpdisps[(int) b->disposition]); |
| |
| /* 4 */ |
| annotate_field (3); |
| ui_out_field_fmt (uiout, "enabled", "%c", bpenables[(int) b->enable_state]); |
| ui_out_spaces (uiout, 2); |
| |
| /* 5 and 6 */ |
| strcpy (wrap_indent, " "); |
| if (addressprint) |
| { |
| if (TARGET_ADDR_BIT <= 32) |
| strcat (wrap_indent, " "); |
| else |
| strcat (wrap_indent, " "); |
| } |
| switch (b->type) |
| { |
| case bp_none: |
| internal_error (__FILE__, __LINE__, |
| "print_one_breakpoint: bp_none encountered\n"); |
| break; |
| |
| case bp_watchpoint: |
| case bp_hardware_watchpoint: |
| case bp_read_watchpoint: |
| case bp_access_watchpoint: |
| /* Field 4, the address, is omitted (which makes the columns |
| not line up too nicely with the headers, but the effect |
| is relatively readable). */ |
| if (addressprint) |
| ui_out_field_skip (uiout, "addr"); |
| annotate_field (5); |
| print_expression (b->exp, stb->stream); |
| ui_out_field_stream (uiout, "what", stb); |
| break; |
| |
| case bp_catch_load: |
| case bp_catch_unload: |
| /* Field 4, the address, is omitted (which makes the columns |
| not line up too nicely with the headers, but the effect |
| is relatively readable). */ |
| if (addressprint) |
| ui_out_field_skip (uiout, "addr"); |
| annotate_field (5); |
| if (b->dll_pathname == NULL) |
| { |
| ui_out_field_string (uiout, "what", "<any library>"); |
| ui_out_spaces (uiout, 1); |
| } |
| else |
| { |
| ui_out_text (uiout, "library \""); |
| ui_out_field_string (uiout, "what", b->dll_pathname); |
| ui_out_text (uiout, "\" "); |
| } |
| break; |
| |
| case bp_catch_fork: |
| case bp_catch_vfork: |
| /* Field 4, the address, is omitted (which makes the columns |
| not line up too nicely with the headers, but the effect |
| is relatively readable). */ |
| if (addressprint) |
| ui_out_field_skip (uiout, "addr"); |
| annotate_field (5); |
| if (b->forked_inferior_pid != 0) |
| { |
| ui_out_text (uiout, "process "); |
| ui_out_field_int (uiout, "what", b->forked_inferior_pid); |
| ui_out_spaces (uiout, 1); |
| } |
| |
| case bp_catch_exec: |
| /* Field 4, the address, is omitted (which makes the columns |
| not line up too nicely with the headers, but the effect |
| is relatively readable). */ |
| if (addressprint) |
| ui_out_field_skip (uiout, "addr"); |
| annotate_field (5); |
| if (b->exec_pathname != NULL) |
| { |
| ui_out_text (uiout, "program \""); |
| ui_out_field_string (uiout, "what", b->exec_pathname); |
| ui_out_text (uiout, "\" "); |
| } |
| break; |
| |
| case bp_catch_catch: |
| /* Field 4, the address, is omitted (which makes the columns |
| not line up too nicely with the headers, but the effect |
| is relatively readable). */ |
| if (addressprint) |
| ui_out_field_skip (uiout, "addr"); |
| annotate_field (5); |
| ui_out_field_string (uiout, "what", "exception catch"); |
| ui_out_spaces (uiout, 1); |
| break; |
| |
| case bp_catch_throw: |
| /* Field 4, the address, is omitted (which makes the columns |
| not line up too nicely with the headers, but the effect |
| is relatively readable). */ |
| if (addressprint) |
| ui_out_field_skip (uiout, "addr"); |
| annotate_field (5); |
| ui_out_field_string (uiout, "what", "exception throw"); |
| ui_out_spaces (uiout, 1); |
| break; |
| |
| case bp_breakpoint: |
| case bp_hardware_breakpoint: |
| case bp_until: |
| case bp_finish: |
| case bp_longjmp: |
| case bp_longjmp_resume: |
| case bp_step_resume: |
| case bp_through_sigtramp: |
| case bp_watchpoint_scope: |
| case bp_call_dummy: |
| case bp_shlib_event: |
| case bp_thread_event: |
| case bp_overlay_event: |
| if (addressprint) |
| { |
| annotate_field (4); |
| ui_out_field_core_addr (uiout, "addr", b->address); |
| } |
| annotate_field (5); |
| *last_addr = b->address; |
| if (b->source_file) |
| { |
| sym = find_pc_sect_function (b->address, b->section); |
| if (sym) |
| { |
| ui_out_text (uiout, "in "); |
| ui_out_field_string (uiout, "func", |
| SYMBOL_PRINT_NAME (sym)); |
| ui_out_wrap_hint (uiout, wrap_indent); |
| ui_out_text (uiout, " at "); |
| } |
| ui_out_field_string (uiout, "file", b->source_file); |
| ui_out_text (uiout, ":"); |
| ui_out_field_int (uiout, "line", b->line_number); |
| } |
| else |
| { |
| print_address_symbolic (b->address, stb->stream, demangle, ""); |
| ui_out_field_stream (uiout, "at", stb); |
| } |
| break; |
| } |
| |
| if (b->thread != -1) |
| { |
| /* FIXME: This seems to be redundant and lost here; see the |
| "stop only in" line a little further down. */ |
| ui_out_text (uiout, " thread "); |
| ui_out_field_int (uiout, "thread", b->thread); |
| } |
| |
| ui_out_text (uiout, "\n"); |
| |
| if (frame_id_p (b->frame_id)) |
| { |
| annotate_field (6); |
| ui_out_text (uiout, "\tstop only in stack frame at "); |
| /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside |
| the frame ID. */ |
| ui_out_field_core_addr (uiout, "frame", b->frame_id.base); |
| ui_out_text (uiout, "\n"); |
| } |
| |
| if (b->cond) |
| { |
| annotate_field (7); |
| ui_out_text (uiout, "\tstop only if "); |
| print_expression (b->cond, stb->stream); |
| ui_out_field_stream (uiout, "cond", stb); |
| ui_out_text (uiout, "\n"); |
| } |
| |
| if (b->thread != -1) |
| { |
| /* FIXME should make an annotation for this */ |
| ui_out_text (uiout, "\tstop only in thread "); |
| ui_out_field_int (uiout, "thread", b->thread); |
| ui_out_text (uiout, "\n"); |
| } |
| |
| if (show_breakpoint_hit_counts && b->hit_count) |
| { |
| /* FIXME should make an annotation for this */ |
| if (ep_is_catchpoint (b)) |
| ui_out_text (uiout, "\tcatchpoint"); |
| else |
| ui_out_text (uiout, "\tbreakpoint"); |
| ui_out_text (uiout, " already hit "); |
| ui_out_field_int (uiout, "times", b->hit_count); |
| if (b->hit_count == 1) |
| ui_out_text (uiout, " time\n"); |
| else |
| ui_out_text (uiout, " times\n"); |
| } |
| |
| /* Output the count also if it is zero, but only if this is |
| mi. FIXME: Should have a better test for this. */ |
| if (ui_out_is_mi_like_p (uiout)) |
| if (show_breakpoint_hit_counts && b->hit_count == 0) |
| ui_out_field_int (uiout, "times", b->hit_count); |
| |
| if (b->ignore_count) |
| { |
| annotate_field (8); |
| ui_out_text (uiout, "\tignore next "); |
| ui_out_field_int (uiout, "ignore", b->ignore_count); |
| ui_out_text (uiout, " hits\n"); |
| } |
| |
| if ((l = b->commands)) |
| { |
| struct cleanup *script_chain; |
| |
| annotate_field (9); |
| script_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "script"); |
| print_command_lines (uiout, l, 4); |
| do_cleanups (script_chain); |
| } |
| do_cleanups (bkpt_chain); |
| do_cleanups (old_chain); |
| } |
| |
| struct captured_breakpoint_query_args |
| { |
| int bnum; |
| }; |
| |
| static int |
| do_captured_breakpoint_query (struct ui_out *uiout, void *data) |
| { |
| struct captured_breakpoint_query_args *args = data; |
| register struct breakpoint *b; |
| CORE_ADDR dummy_addr = 0; |
| ALL_BREAKPOINTS (b) |
| { |
| if (args->bnum == b->number) |
| { |
| print_one_breakpoint (b, &dummy_addr); |
| return GDB_RC_OK; |
| } |
| } |
| return GDB_RC_NONE; |
| } |
| |
| enum gdb_rc |
| gdb_breakpoint_query (struct ui_out *uiout, int bnum) |
| { |
| struct captured_breakpoint_query_args args; |
| args.bnum = bnum; |
| /* For the moment we don't trust print_one_breakpoint() to not throw |
| an error. */ |
| return catch_exceptions (uiout, do_captured_breakpoint_query, &args, |
| NULL, RETURN_MASK_ALL); |
| } |
| |
| /* Return non-zero if B is user settable (breakpoints, watchpoints, |
| catchpoints, et.al.). */ |
| |
| static int |
| user_settable_breakpoint (const struct breakpoint *b) |
| { |
| return (b->type == bp_breakpoint |
| || b->type == bp_catch_load |
| || b->type == bp_catch_unload |
| || b->type == bp_catch_fork |
| || b->type == bp_catch_vfork |
| || b->type == bp_catch_exec |
| || b->type == bp_catch_catch |
| || b->type == bp_catch_throw |
| || b->type == bp_hardware_breakpoint |
| || b->type == bp_watchpoint |
| || b->type == bp_read_watchpoint |
| || b->type == bp_access_watchpoint |
| || b->type == bp_hardware_watchpoint); |
| } |
| |
| /* Print information on user settable breakpoint (watchpoint, etc) |
| number BNUM. If BNUM is -1 print all user settable breakpoints. |
| If ALLFLAG is non-zero, include non- user settable breakpoints. */ |
| |
| static void |
| breakpoint_1 (int bnum, int allflag) |
| { |
| register struct breakpoint *b; |
| CORE_ADDR last_addr = (CORE_ADDR) -1; |
| int nr_printable_breakpoints; |
| struct cleanup *bkpttbl_chain; |
| |
| /* Compute the number of rows in the table. */ |
| nr_printable_breakpoints = 0; |
| ALL_BREAKPOINTS (b) |
| if (bnum == -1 |
| || bnum == b->number) |
| { |
| if (allflag || user_settable_breakpoint (b)) |
| nr_printable_breakpoints++; |
| } |
| |
| if (addressprint) |
| bkpttbl_chain |
| = make_cleanup_ui_out_table_begin_end (uiout, 6, nr_printable_breakpoints, |
| "BreakpointTable"); |
| else |
| bkpttbl_chain |
| = make_cleanup_ui_out_table_begin_end (uiout, 5, nr_printable_breakpoints, |
| "BreakpointTable"); |
| |
| if (nr_printable_breakpoints > 0) |
| annotate_breakpoints_headers (); |
| if (nr_printable_breakpoints > 0) |
| annotate_field (0); |
| ui_out_table_header (uiout, 3, ui_left, "number", "Num"); /* 1 */ |
| if (nr_printable_breakpoints > 0) |
| annotate_field (1); |
| ui_out_table_header (uiout, 14, ui_left, "type", "Type"); /* 2 */ |
| if (nr_printable_breakpoints > 0) |
| annotate_field (2); |
| ui_out_table_header (uiout, 4, ui_left, "disp", "Disp"); /* 3 */ |
| if (nr_printable_breakpoints > 0) |
| annotate_field (3); |
| ui_out_table_header (uiout, 3, ui_left, "enabled", "Enb"); /* 4 */ |
| if (addressprint) |
| { |
| if (nr_printable_breakpoints > 0) |
| annotate_field (4); |
| if (TARGET_ADDR_BIT <= 32) |
| ui_out_table_header (uiout, 10, ui_left, "addr", "Address");/* 5 */ |
| else |
| ui_out_table_header (uiout, 18, ui_left, "addr", "Address");/* 5 */ |
| } |
| if (nr_printable_breakpoints > 0) |
| annotate_field (5); |
| ui_out_table_header (uiout, 40, ui_noalign, "what", "What"); /* 6 */ |
| ui_out_table_body (uiout); |
| if (nr_printable_breakpoints > 0) |
| annotate_breakpoints_table (); |
| |
| ALL_BREAKPOINTS (b) |
| if (bnum == -1 |
| || bnum == b->number) |
| { |
| /* We only print out user settable breakpoints unless the |
| allflag is set. */ |
| if (allflag || user_settable_breakpoint (b)) |
| print_one_breakpoint (b, &last_addr); |
| } |
| |
| do_cleanups (bkpttbl_chain); |
| |
| if (nr_printable_breakpoints == 0) |
| { |
| if (bnum == -1) |
| ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n"); |
| else |
| ui_out_message (uiout, 0, "No breakpoint or watchpoint number %d.\n", |
| bnum); |
| } |
| else |
| { |
| /* Compare against (CORE_ADDR)-1 in case some compiler decides |
| that a comparison of an unsigned with -1 is always false. */ |
| if (last_addr != (CORE_ADDR) -1) |
| set_next_address (last_addr); |
| } |
| |
| /* FIXME? Should this be moved up so that it is only called when |
| there have been breakpoints? */ |
| annotate_breakpoints_table_end (); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| breakpoints_info (char *bnum_exp, int from_tty) |
| { |
| int bnum = -1; |
| |
| if (bnum_exp) |
| bnum = parse_and_eval_long (bnum_exp); |
| |
| breakpoint_1 (bnum, 0); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| maintenance_info_breakpoints (char *bnum_exp, int from_tty) |
| { |
| int bnum = -1; |
| |
| if (bnum_exp) |
| bnum = parse_and_eval_long (bnum_exp); |
| |
| breakpoint_1 (bnum, 1); |
| } |
| |
| /* Print a message describing any breakpoints set at PC. */ |
| |
| static void |
| describe_other_breakpoints (CORE_ADDR pc, asection *section) |
| { |
| register int others = 0; |
| register struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->address == pc) /* address match / overlay match */ |
| if (!overlay_debugging || b->section == section) |
| others++; |
| if (others > 0) |
| { |
| printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : ""); |
| ALL_BREAKPOINTS (b) |
| if (b->address == pc) /* address match / overlay match */ |
| if (!overlay_debugging || b->section == section) |
| { |
| others--; |
| printf_filtered ("%d%s%s ", |
| b->number, |
| ((b->enable_state == bp_disabled || |
| b->enable_state == bp_shlib_disabled || |
| b->enable_state == bp_call_disabled) |
| ? " (disabled)" |
| : b->enable_state == bp_permanent |
| ? " (permanent)" |
| : ""), |
| (others > 1) ? "," |
| : ((others == 1) ? " and" : "")); |
| } |
| printf_filtered ("also set at pc "); |
| print_address_numeric (pc, 1, gdb_stdout); |
| printf_filtered (".\n"); |
| } |
| } |
| |
| /* Set the default place to put a breakpoint |
| for the `break' command with no arguments. */ |
| |
| void |
| set_default_breakpoint (int valid, CORE_ADDR addr, struct symtab *symtab, |
| int line) |
| { |
| default_breakpoint_valid = valid; |
| default_breakpoint_address = addr; |
| default_breakpoint_symtab = symtab; |
| default_breakpoint_line = line; |
| } |
| |
| /* Return true iff it is meaningful to use the address member of |
| BPT. For some breakpoint types, the address member is irrelevant |
| and it makes no sense to attempt to compare it to other addresses |
| (or use it for any other purpose either). |
| |
| More specifically, each of the following breakpoint types will always |
| have a zero valued address and we don't want check_duplicates() to mark |
| breakpoints of any of these types to be a duplicate of an actual |
| breakpoint at address zero: |
| |
| bp_watchpoint |
| bp_hardware_watchpoint |
| bp_read_watchpoint |
| bp_access_watchpoint |
| bp_catch_exec |
| bp_longjmp_resume |
| bp_catch_fork |
| bp_catch_vork */ |
| |
| static int |
| breakpoint_address_is_meaningful (struct breakpoint *bpt) |
| { |
| enum bptype type = bpt->type; |
| |
| return (type != bp_watchpoint |
| && type != bp_hardware_watchpoint |
| && type != bp_read_watchpoint |
| && type != bp_access_watchpoint |
| && type != bp_catch_exec |
| && type != bp_longjmp_resume |
| && type != bp_catch_fork |
| && type != bp_catch_vfork); |
| } |
| |
| /* Rescan breakpoints at the same address and section as BPT, |
| marking the first one as "first" and any others as "duplicates". |
| This is so that the bpt instruction is only inserted once. |
| If we have a permanent breakpoint at the same place as BPT, make |
| that one the official one, and the rest as duplicates. */ |
| |
| static void |
| check_duplicates (struct breakpoint *bpt) |
| { |
| register struct breakpoint *b; |
| register int count = 0; |
| struct breakpoint *perm_bp = 0; |
| CORE_ADDR address = bpt->address; |
| asection *section = bpt->section; |
| |
| if (! breakpoint_address_is_meaningful (bpt)) |
| return; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->enable_state != bp_disabled |
| && b->enable_state != bp_shlib_disabled |
| && b->enable_state != bp_call_disabled |
| && b->address == address /* address / overlay match */ |
| && (!overlay_debugging || b->section == section) |
| && breakpoint_address_is_meaningful (b)) |
| { |
| /* Have we found a permanent breakpoint? */ |
| if (b->enable_state == bp_permanent) |
| { |
| perm_bp = b; |
| break; |
| } |
| |
| count++; |
| b->duplicate = count > 1; |
| } |
| |
| /* If we found a permanent breakpoint at this address, go over the |
| list again and declare all the other breakpoints there to be the |
| duplicates. */ |
| if (perm_bp) |
| { |
| perm_bp->duplicate = 0; |
| |
| /* Permanent breakpoint should always be inserted. */ |
| if (! perm_bp->inserted) |
| internal_error (__FILE__, __LINE__, |
| "allegedly permanent breakpoint is not " |
| "actually inserted"); |
| |
| ALL_BREAKPOINTS (b) |
| if (b != perm_bp) |
| { |
| if (b->inserted) |
| internal_error (__FILE__, __LINE__, |
| "another breakpoint was inserted on top of " |
| "a permanent breakpoint"); |
| |
| if (b->enable_state != bp_disabled |
| && b->enable_state != bp_shlib_disabled |
| && b->enable_state != bp_call_disabled |
| && b->address == address /* address / overlay match */ |
| && (!overlay_debugging || b->section == section) |
| && breakpoint_address_is_meaningful (b)) |
| b->duplicate = 1; |
| } |
| } |
| } |
| |
| /* set_raw_breakpoint() is a low level routine for allocating and |
| partially initializing a breakpoint of type BPTYPE. The newly |
| created breakpoint's address, section, source file name, and line |
| number are provided by SAL. The newly created and partially |
| initialized breakpoint is added to the breakpoint chain and |
| is also returned as the value of this function. |
| |
| It is expected that the caller will complete the initialization of |
| the newly created breakpoint struct as well as output any status |
| information regarding the creation of a new breakpoint. In |
| particular, set_raw_breakpoint() does NOT set the breakpoint |
| number! Care should be taken to not allow an error() to occur |
| prior to completing the initialization of the breakpoint. If this |
| should happen, a bogus breakpoint will be left on the chain. */ |
| |
| struct breakpoint * |
| set_raw_breakpoint (struct symtab_and_line sal, enum bptype bptype) |
| { |
| register struct breakpoint *b, *b1; |
| |
| b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); |
| memset (b, 0, sizeof (*b)); |
| b->address = sal.pc; |
| if (sal.symtab == NULL) |
| b->source_file = NULL; |
| else |
| b->source_file = savestring (sal.symtab->filename, |
| strlen (sal.symtab->filename)); |
| b->section = sal.section; |
| b->type = bptype; |
| b->language = current_language->la_language; |
| b->input_radix = input_radix; |
| b->thread = -1; |
| b->line_number = sal.line; |
| b->enable_state = bp_enabled; |
| b->next = 0; |
| b->silent = 0; |
| b->ignore_count = 0; |
| b->commands = NULL; |
| b->frame_id = null_frame_id; |
| b->dll_pathname = NULL; |
| b->triggered_dll_pathname = NULL; |
| b->forked_inferior_pid = 0; |
| b->exec_pathname = NULL; |
| |
| /* Add this breakpoint to the end of the chain |
| so that a list of breakpoints will come out in order |
| of increasing numbers. */ |
| |
| b1 = breakpoint_chain; |
| if (b1 == 0) |
| breakpoint_chain = b; |
| else |
| { |
| while (b1->next) |
| b1 = b1->next; |
| b1->next = b; |
| } |
| |
| check_duplicates (b); |
| breakpoints_changed (); |
| |
| return b; |
| } |
| |
| |
| /* Note that the breakpoint object B describes a permanent breakpoint |
| instruction, hard-wired into the inferior's code. */ |
| void |
| make_breakpoint_permanent (struct breakpoint *b) |
| { |
| b->enable_state = bp_permanent; |
| |
| /* By definition, permanent breakpoints are already present in the code. */ |
| b->inserted = 1; |
| } |
| |
| static struct breakpoint * |
| create_internal_breakpoint (CORE_ADDR address, enum bptype type) |
| { |
| static int internal_breakpoint_number = -1; |
| struct symtab_and_line sal; |
| struct breakpoint *b; |
| |
| init_sal (&sal); /* initialize to zeroes */ |
| |
| sal.pc = address; |
| sal.section = find_pc_overlay (sal.pc); |
| |
| b = set_raw_breakpoint (sal, type); |
| b->number = internal_breakpoint_number--; |
| b->disposition = disp_donttouch; |
| |
| return b; |
| } |
| |
| |
| static void |
| create_longjmp_breakpoint (char *func_name) |
| { |
| struct breakpoint *b; |
| struct minimal_symbol *m; |
| |
| if (func_name == NULL) |
| b = create_internal_breakpoint (0, bp_longjmp_resume); |
| else |
| { |
| if ((m = lookup_minimal_symbol_text (func_name, NULL, NULL)) == NULL) |
| return; |
| |
| b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m), bp_longjmp); |
| } |
| |
| b->enable_state = bp_disabled; |
| b->silent = 1; |
| if (func_name) |
| b->addr_string = xstrdup (func_name); |
| } |
| |
| /* Call this routine when stepping and nexting to enable a breakpoint |
| if we do a longjmp(). When we hit that breakpoint, call |
| set_longjmp_resume_breakpoint() to figure out where we are going. */ |
| |
| void |
| enable_longjmp_breakpoint (void) |
| { |
| register struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->type == bp_longjmp) |
| { |
| b->enable_state = bp_enabled; |
| check_duplicates (b); |
| } |
| } |
| |
| void |
| disable_longjmp_breakpoint (void) |
| { |
| register struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->type == bp_longjmp |
| || b->type == bp_longjmp_resume) |
| { |
| b->enable_state = bp_disabled; |
| check_duplicates (b); |
| } |
| } |
| |
| static void |
| create_overlay_event_breakpoint (char *func_name) |
| { |
| struct breakpoint *b; |
| struct minimal_symbol *m; |
| |
| if ((m = lookup_minimal_symbol_text (func_name, NULL, NULL)) == NULL) |
| return; |
| |
| b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m), |
| bp_overlay_event); |
| b->addr_string = xstrdup (func_name); |
| |
| if (overlay_debugging == ovly_auto) |
| { |
| b->enable_state = bp_enabled; |
| overlay_events_enabled = 1; |
| } |
| else |
| { |
| b->enable_state = bp_disabled; |
| overlay_events_enabled = 0; |
| } |
| } |
| |
| void |
| enable_overlay_breakpoints (void) |
| { |
| register struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->type == bp_overlay_event) |
| { |
| b->enable_state = bp_enabled; |
| check_duplicates (b); |
| overlay_events_enabled = 1; |
| } |
| } |
| |
| void |
| disable_overlay_breakpoints (void) |
| { |
| register struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->type == bp_overlay_event) |
| { |
| b->enable_state = bp_disabled; |
| check_duplicates (b); |
| overlay_events_enabled = 0; |
| } |
| } |
| |
| struct breakpoint * |
| create_thread_event_breakpoint (CORE_ADDR address) |
| { |
| struct breakpoint *b; |
| |
| b = create_internal_breakpoint (address, bp_thread_event); |
| |
| b->enable_state = bp_enabled; |
| /* addr_string has to be used or breakpoint_re_set will delete me. */ |
| xasprintf (&b->addr_string, "*0x%s", paddr (b->address)); |
| |
| return b; |
| } |
| |
| void |
| remove_thread_event_breakpoints (void) |
| { |
| struct breakpoint *b, *temp; |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| if (b->type == bp_thread_event) |
| delete_breakpoint (b); |
| } |
| |
| #ifdef SOLIB_ADD |
| void |
| remove_solib_event_breakpoints (void) |
| { |
| register struct breakpoint *b, *temp; |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| if (b->type == bp_shlib_event) |
| delete_breakpoint (b); |
| } |
| |
| struct breakpoint * |
| create_solib_event_breakpoint (CORE_ADDR address) |
| { |
| struct breakpoint *b; |
| |
| b = create_internal_breakpoint (address, bp_shlib_event); |
| return b; |
| } |
| |
| /* Disable any breakpoints that are on code in shared libraries. Only |
| apply to enabled breakpoints, disabled ones can just stay disabled. */ |
| |
| void |
| disable_breakpoints_in_shlibs (int silent) |
| { |
| struct breakpoint *b; |
| int disabled_shlib_breaks = 0; |
| |
| /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */ |
| ALL_BREAKPOINTS (b) |
| { |
| #if defined (PC_SOLIB) |
| if (((b->type == bp_breakpoint) || |
| (b->type == bp_hardware_breakpoint)) && |
| b->enable_state == bp_enabled && |
| !b->duplicate && |
| PC_SOLIB (b->address)) |
| { |
| b->enable_state = bp_shlib_disabled; |
| if (!silent) |
| { |
| if (!disabled_shlib_breaks) |
| { |
| target_terminal_ours_for_output (); |
| warning ("Temporarily disabling shared library breakpoints:"); |
| } |
| disabled_shlib_breaks = 1; |
| warning ("breakpoint #%d ", b->number); |
| } |
| } |
| #endif |
| } |
| } |
| |
| /* Try to reenable any breakpoints in shared libraries. */ |
| void |
| re_enable_breakpoints_in_shlibs (void) |
| { |
| struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->enable_state == bp_shlib_disabled) |
| { |
| char buf[1]; |
| |
| /* Do not reenable the breakpoint if the shared library |
| is still not mapped in. */ |
| if (target_read_memory (b->address, buf, 1) == 0) |
| b->enable_state = bp_enabled; |
| } |
| } |
| |
| #endif |
| |
| static void |
| solib_load_unload_1 (char *hookname, int tempflag, char *dll_pathname, |
| char *cond_string, enum bptype bp_kind) |
| { |
| struct breakpoint *b; |
| struct symtabs_and_lines sals; |
| struct cleanup *old_chain; |
| struct cleanup *canonical_strings_chain = NULL; |
| char *addr_start = hookname; |
| char *addr_end = NULL; |
| char **canonical = (char **) NULL; |
| int thread = -1; /* All threads. */ |
| |
| /* Set a breakpoint on the specified hook. */ |
| sals = decode_line_1 (&hookname, 1, (struct symtab *) NULL, 0, &canonical); |
| addr_end = hookname; |
| |
| if (sals.nelts == 0) |
| { |
| warning ("Unable to set a breakpoint on dynamic linker callback."); |
| warning ("Suggest linking with /opt/langtools/lib/end.o."); |
| warning ("GDB will be unable to track shl_load/shl_unload calls"); |
| return; |
| } |
| if (sals.nelts != 1) |
| { |
| warning ("Unable to set unique breakpoint on dynamic linker callback."); |
| warning ("GDB will be unable to track shl_load/shl_unload calls"); |
| return; |
| } |
| |
| /* Make sure that all storage allocated in decode_line_1 gets freed |
| in case the following errors out. */ |
| old_chain = make_cleanup (xfree, sals.sals); |
| if (canonical != (char **) NULL) |
| { |
| make_cleanup (xfree, canonical); |
| canonical_strings_chain = make_cleanup (null_cleanup, 0); |
| if (canonical[0] != NULL) |
| make_cleanup (xfree, canonical[0]); |
| } |
| |
| resolve_sal_pc (&sals.sals[0]); |
| |
| /* Remove the canonical strings from the cleanup, they are needed below. */ |
| if (canonical != (char **) NULL) |
| discard_cleanups (canonical_strings_chain); |
| |
| b = set_raw_breakpoint (sals.sals[0], bp_kind); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| b->cond = NULL; |
| b->cond_string = (cond_string == NULL) ? |
| NULL : savestring (cond_string, strlen (cond_string)); |
| b->thread = thread; |
| |
| if (canonical != (char **) NULL && canonical[0] != NULL) |
| b->addr_string = canonical[0]; |
| else if (addr_start) |
| b->addr_string = savestring (addr_start, addr_end - addr_start); |
| |
| b->enable_state = bp_enabled; |
| b->disposition = tempflag ? disp_del : disp_donttouch; |
| |
| if (dll_pathname == NULL) |
| b->dll_pathname = NULL; |
| else |
| { |
| b->dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1); |
| strcpy (b->dll_pathname, dll_pathname); |
| } |
| |
| mention (b); |
| do_cleanups (old_chain); |
| } |
| |
| void |
| create_solib_load_event_breakpoint (char *hookname, int tempflag, |
| char *dll_pathname, char *cond_string) |
| { |
| solib_load_unload_1 (hookname, tempflag, dll_pathname, |
| cond_string, bp_catch_load); |
| } |
| |
| void |
| create_solib_unload_event_breakpoint (char *hookname, int tempflag, |
| char *dll_pathname, char *cond_string) |
| { |
| solib_load_unload_1 (hookname,tempflag, dll_pathname, |
| cond_string, bp_catch_unload); |
| } |
| |
| static void |
| create_fork_vfork_event_catchpoint (int tempflag, char *cond_string, |
| enum bptype bp_kind) |
| { |
| struct symtab_and_line sal; |
| struct breakpoint *b; |
| int thread = -1; /* All threads. */ |
| |
| init_sal (&sal); |
| sal.pc = 0; |
| sal.symtab = NULL; |
| sal.line = 0; |
| |
| b = set_raw_breakpoint (sal, bp_kind); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| b->cond = NULL; |
| b->cond_string = (cond_string == NULL) ? |
| NULL : savestring (cond_string, strlen (cond_string)); |
| b->thread = thread; |
| b->addr_string = NULL; |
| b->enable_state = bp_enabled; |
| b->disposition = tempflag ? disp_del : disp_donttouch; |
| b->forked_inferior_pid = 0; |
| |
| mention (b); |
| } |
| |
| void |
| create_fork_event_catchpoint (int tempflag, char *cond_string) |
| { |
| create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork); |
| } |
| |
| void |
| create_vfork_event_catchpoint (int tempflag, char *cond_string) |
| { |
| create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork); |
| } |
| |
| void |
| create_exec_event_catchpoint (int tempflag, char *cond_string) |
| { |
| struct symtab_and_line sal; |
| struct breakpoint *b; |
| int thread = -1; /* All threads. */ |
| |
| init_sal (&sal); |
| sal.pc = 0; |
| sal.symtab = NULL; |
| sal.line = 0; |
| |
| b = set_raw_breakpoint (sal, bp_catch_exec); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| b->cond = NULL; |
| b->cond_string = (cond_string == NULL) ? |
| NULL : savestring (cond_string, strlen (cond_string)); |
| b->thread = thread; |
| b->addr_string = NULL; |
| b->enable_state = bp_enabled; |
| b->disposition = tempflag ? disp_del : disp_donttouch; |
| |
| mention (b); |
| } |
| |
| static int |
| hw_breakpoint_used_count (void) |
| { |
| register struct breakpoint *b; |
| int i = 0; |
| |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->type == bp_hardware_breakpoint && b->enable_state == bp_enabled) |
| i++; |
| } |
| |
| return i; |
| } |
| |
| static int |
| hw_watchpoint_used_count (enum bptype type, int *other_type_used) |
| { |
| register struct breakpoint *b; |
| int i = 0; |
| |
| *other_type_used = 0; |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->enable_state == bp_enabled) |
| { |
| if (b->type == type) |
| i++; |
| else if ((b->type == bp_hardware_watchpoint || |
| b->type == bp_read_watchpoint || |
| b->type == bp_access_watchpoint) |
| && b->enable_state == bp_enabled) |
| *other_type_used = 1; |
| } |
| } |
| return i; |
| } |
| |
| /* Call this after hitting the longjmp() breakpoint. Use this to set |
| a new breakpoint at the target of the jmp_buf. |
| |
| FIXME - This ought to be done by setting a temporary breakpoint |
| that gets deleted automatically... */ |
| |
| void |
| set_longjmp_resume_breakpoint (CORE_ADDR pc, struct frame_id frame_id) |
| { |
| register struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->type == bp_longjmp_resume) |
| { |
| b->address = pc; |
| b->enable_state = bp_enabled; |
| b->frame_id = frame_id; |
| check_duplicates (b); |
| return; |
| } |
| } |
| |
| void |
| disable_watchpoints_before_interactive_call_start (void) |
| { |
| struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| { |
| if (((b->type == bp_watchpoint) |
| || (b->type == bp_hardware_watchpoint) |
| || (b->type == bp_read_watchpoint) |
| || (b->type == bp_access_watchpoint) |
| || ep_is_exception_catchpoint (b)) |
| && (b->enable_state == bp_enabled)) |
| { |
| b->enable_state = bp_call_disabled; |
| check_duplicates (b); |
| } |
| } |
| } |
| |
| void |
| enable_watchpoints_after_interactive_call_stop (void) |
| { |
| struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| { |
| if (((b->type == bp_watchpoint) |
| || (b->type == bp_hardware_watchpoint) |
| || (b->type == bp_read_watchpoint) |
| || (b->type == bp_access_watchpoint) |
| || ep_is_exception_catchpoint (b)) |
| && (b->enable_state == bp_call_disabled)) |
| { |
| b->enable_state = bp_enabled; |
| check_duplicates (b); |
| } |
| } |
| } |
| |
| |
| /* Set a breakpoint that will evaporate an end of command |
| at address specified by SAL. |
| Restrict it to frame FRAME if FRAME is nonzero. */ |
| |
| struct breakpoint * |
| set_momentary_breakpoint (struct symtab_and_line sal, struct frame_id frame_id, |
| enum bptype type) |
| { |
| register struct breakpoint *b; |
| b = set_raw_breakpoint (sal, type); |
| b->enable_state = bp_enabled; |
| b->disposition = disp_donttouch; |
| b->frame_id = frame_id; |
| |
| /* If we're debugging a multi-threaded program, then we |
| want momentary breakpoints to be active in only a |
| single thread of control. */ |
| if (in_thread_list (inferior_ptid)) |
| b->thread = pid_to_thread_id (inferior_ptid); |
| |
| return b; |
| } |
| |
| |
| /* Tell the user we have just set a breakpoint B. */ |
| |
| static void |
| mention (struct breakpoint *b) |
| { |
| int say_where = 0; |
| struct cleanup *old_chain, *ui_out_chain; |
| struct ui_stream *stb; |
| |
| stb = ui_out_stream_new (uiout); |
| old_chain = make_cleanup_ui_out_stream_delete (stb); |
| |
| /* FIXME: This is misplaced; mention() is called by things (like hitting a |
| watchpoint) other than breakpoint creation. It should be possible to |
| clean this up and at the same time replace the random calls to |
| breakpoint_changed with this hook, as has already been done for |
| delete_breakpoint_hook and so on. */ |
| if (create_breakpoint_hook) |
| create_breakpoint_hook (b); |
| breakpoint_create_event (b->number); |
| |
| switch (b->type) |
| { |
| case bp_none: |
| printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number); |
| break; |
| case bp_watchpoint: |
| ui_out_text (uiout, "Watchpoint "); |
| ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt"); |
| ui_out_field_int (uiout, "number", b->number); |
| ui_out_text (uiout, ": "); |
| print_expression (b->exp, stb->stream); |
| ui_out_field_stream (uiout, "exp", stb); |
| do_cleanups (ui_out_chain); |
| break; |
| case bp_hardware_watchpoint: |
| ui_out_text (uiout, "Hardware watchpoint "); |
| ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt"); |
| ui_out_field_int (uiout, "number", b->number); |
| ui_out_text (uiout, ": "); |
| print_expression (b->exp, stb->stream); |
| ui_out_field_stream (uiout, "exp", stb); |
| do_cleanups (ui_out_chain); |
| break; |
| case bp_read_watchpoint: |
| ui_out_text (uiout, "Hardware read watchpoint "); |
| ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-rwpt"); |
| ui_out_field_int (uiout, "number", b->number); |
| ui_out_text (uiout, ": "); |
| print_expression (b->exp, stb->stream); |
| ui_out_field_stream (uiout, "exp", stb); |
| do_cleanups (ui_out_chain); |
| break; |
| case bp_access_watchpoint: |
| ui_out_text (uiout, "Hardware access (read/write) watchpoint "); |
| ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-awpt"); |
| ui_out_field_int (uiout, "number", b->number); |
| ui_out_text (uiout, ": "); |
| print_expression (b->exp, stb->stream); |
| ui_out_field_stream (uiout, "exp", stb); |
| do_cleanups (ui_out_chain); |
| break; |
| case bp_breakpoint: |
| if (ui_out_is_mi_like_p (uiout)) |
| { |
| say_where = 0; |
| break; |
| } |
| printf_filtered ("Breakpoint %d", b->number); |
| say_where = 1; |
| break; |
| case bp_hardware_breakpoint: |
| if (ui_out_is_mi_like_p (uiout)) |
| { |
| say_where = 0; |
| break; |
| } |
| printf_filtered ("Hardware assisted breakpoint %d", b->number); |
| say_where = 1; |
| break; |
| case bp_catch_load: |
| case bp_catch_unload: |
| printf_filtered ("Catchpoint %d (%s %s)", |
| b->number, |
| (b->type == bp_catch_load) ? "load" : "unload", |
| (b->dll_pathname != NULL) ? |
| b->dll_pathname : "<any library>"); |
| break; |
| case bp_catch_fork: |
| case bp_catch_vfork: |
| printf_filtered ("Catchpoint %d (%s)", |
| b->number, |
| (b->type == bp_catch_fork) ? "fork" : "vfork"); |
| break; |
| case bp_catch_exec: |
| printf_filtered ("Catchpoint %d (exec)", |
| b->number); |
| break; |
| case bp_catch_catch: |
| case bp_catch_throw: |
| printf_filtered ("Catchpoint %d (%s)", |
| b->number, |
| (b->type == bp_catch_catch) ? "catch" : "throw"); |
| break; |
| |
| case bp_until: |
| case bp_finish: |
| case bp_longjmp: |
| case bp_longjmp_resume: |
| case bp_step_resume: |
| case bp_through_sigtramp: |
| case bp_call_dummy: |
| case bp_watchpoint_scope: |
| case bp_shlib_event: |
| case bp_thread_event: |
| case bp_overlay_event: |
| break; |
| } |
| if (say_where) |
| { |
| if (addressprint || b->source_file == NULL) |
| { |
| printf_filtered (" at "); |
| print_address_numeric (b->address, 1, gdb_stdout); |
| } |
| if (b->source_file) |
| printf_filtered (": file %s, line %d.", |
| b->source_file, b->line_number); |
| } |
| do_cleanups (old_chain); |
| if (ui_out_is_mi_like_p (uiout)) |
| return; |
| printf_filtered ("\n"); |
| } |
| |
| |
| /* Add SALS.nelts breakpoints to the breakpoint table. For each |
| SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i], |
| COND[i] and COND_STRING[i] values. |
| |
| NOTE: If the function succeeds, the caller is expected to cleanup |
| the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the |
| array contents). If the function fails (error() is called), the |
| caller is expected to cleanups both the ADDR_STRING, COND_STRING, |
| COND and SALS arrays and each of those arrays contents. */ |
| |
| static void |
| create_breakpoints (struct symtabs_and_lines sals, char **addr_string, |
| struct expression **cond, char **cond_string, |
| enum bptype type, enum bpdisp disposition, |
| int thread, int ignore_count, int from_tty) |
| { |
| if (type == bp_hardware_breakpoint) |
| { |
| int i = hw_breakpoint_used_count (); |
| int target_resources_ok = |
| TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint, |
| i + sals.nelts, 0); |
| if (target_resources_ok == 0) |
| error ("No hardware breakpoint support in the target."); |
| else if (target_resources_ok < 0) |
| error ("Hardware breakpoints used exceeds limit."); |
| } |
| |
| /* Now set all the breakpoints. */ |
| { |
| int i; |
| for (i = 0; i < sals.nelts; i++) |
| { |
| struct breakpoint *b; |
| struct symtab_and_line sal = sals.sals[i]; |
| |
| if (from_tty) |
| describe_other_breakpoints (sal.pc, sal.section); |
| |
| b = set_raw_breakpoint (sal, type); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| b->cond = cond[i]; |
| b->thread = thread; |
| if (addr_string[i]) |
| b->addr_string = addr_string[i]; |
| else |
| /* addr_string has to be used or breakpoint_re_set will delete |
| me. */ |
| xasprintf (&b->addr_string, "*0x%s", paddr (b->address)); |
| b->cond_string = cond_string[i]; |
| b->ignore_count = ignore_count; |
| b->enable_state = bp_enabled; |
| b->disposition = disposition; |
| mention (b); |
| } |
| } |
| } |
| |
| /* Parse ARG which is assumed to be a SAL specification possibly |
| followed by conditionals. On return, SALS contains an array of SAL |
| addresses found. ADDR_STRING contains a vector of (canonical) |
| address strings. ARG points to the end of the SAL. */ |
| |
| void |
| parse_breakpoint_sals (char **address, |
| struct symtabs_and_lines *sals, |
| char ***addr_string) |
| { |
| char *addr_start = *address; |
| *addr_string = NULL; |
| /* If no arg given, or if first arg is 'if ', use the default |
| breakpoint. */ |
| if ((*address) == NULL |
| || (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2]))) |
| { |
| if (default_breakpoint_valid) |
| { |
| struct symtab_and_line sal; |
| init_sal (&sal); /* initialize to zeroes */ |
| sals->sals = (struct symtab_and_line *) |
| xmalloc (sizeof (struct symtab_and_line)); |
| sal.pc = default_breakpoint_address; |
| sal.line = default_breakpoint_line; |
| sal.symtab = default_breakpoint_symtab; |
| sal.section = find_pc_overlay (sal.pc); |
| sals->sals[0] = sal; |
| sals->nelts = 1; |
| } |
| else |
| error ("No default breakpoint address now."); |
| } |
| else |
| { |
| /* Force almost all breakpoints to be in terms of the |
| current_source_symtab (which is decode_line_1's default). This |
| should produce the results we want almost all of the time while |
| leaving default_breakpoint_* alone. |
| ObjC: However, don't match an Objective-C method name which |
| may have a '+' or '-' succeeded by a '[' */ |
| |
| struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
| |
| if (default_breakpoint_valid |
| && (!cursal.symtab |
| || ((strchr ("+-", (*address)[0]) != NULL) |
| && ((*address)[1] != '[')))) |
| *sals = decode_line_1 (address, 1, default_breakpoint_symtab, |
| default_breakpoint_line, addr_string); |
| else |
| *sals = decode_line_1 (address, 1, (struct symtab *) NULL, 0, addr_string); |
| } |
| /* For any SAL that didn't have a canonical string, fill one in. */ |
| if (sals->nelts > 0 && *addr_string == NULL) |
| *addr_string = xcalloc (sals->nelts, sizeof (char **)); |
| if (addr_start != (*address)) |
| { |
| int i; |
| for (i = 0; i < sals->nelts; i++) |
| { |
| /* Add the string if not present. */ |
| if ((*addr_string)[i] == NULL) |
| (*addr_string)[i] = savestring (addr_start, (*address) - addr_start); |
| } |
| } |
| } |
| |
| |
| /* Convert each SAL into a real PC. Verify that the PC can be |
| inserted as a breakpoint. If it can't throw an error. */ |
| |
| void |
| breakpoint_sals_to_pc (struct symtabs_and_lines *sals, |
| char *address) |
| { |
| int i; |
| for (i = 0; i < sals->nelts; i++) |
| { |
| resolve_sal_pc (&sals->sals[i]); |
| |
| /* It's possible for the PC to be nonzero, but still an illegal |
| value on some targets. |
| |
| For example, on HP-UX if you start gdb, and before running the |
| inferior you try to set a breakpoint on a shared library function |
| "foo" where the inferior doesn't call "foo" directly but does |
| pass its address to another function call, then we do find a |
| minimal symbol for the "foo", but it's address is invalid. |
| (Appears to be an index into a table that the loader sets up |
| when the inferior is run.) |
| |
| Give the target a chance to bless sals.sals[i].pc before we |
| try to make a breakpoint for it. */ |
| if (PC_REQUIRES_RUN_BEFORE_USE (sals->sals[i].pc)) |
| { |
| if (address == NULL) |
| error ("Cannot break without a running program."); |
| else |
| error ("Cannot break on %s without a running program.", |
| address); |
| } |
| } |
| } |
| |
| /* Set a breakpoint according to ARG (function, linenum or *address) |
| flag: first bit : 0 non-temporary, 1 temporary. |
| second bit : 0 normal breakpoint, 1 hardware breakpoint. */ |
| |
| static void |
| break_command_1 (char *arg, int flag, int from_tty) |
| { |
| int tempflag, hardwareflag; |
| struct symtabs_and_lines sals; |
| register struct expression **cond = 0; |
| /* Pointers in arg to the start, and one past the end, of the |
| condition. */ |
| char **cond_string = (char **) NULL; |
| char *addr_start = arg; |
| char **addr_string; |
| struct cleanup *old_chain; |
| struct cleanup *breakpoint_chain = NULL; |
| int i; |
| int thread = -1; |
| int ignore_count = 0; |
| |
| hardwareflag = flag & BP_HARDWAREFLAG; |
| tempflag = flag & BP_TEMPFLAG; |
| |
| sals.sals = NULL; |
| sals.nelts = 0; |
| addr_string = NULL; |
| parse_breakpoint_sals (&arg, &sals, &addr_string); |
| |
| if (!sals.nelts) |
| return; |
| |
| /* Create a chain of things that always need to be cleaned up. */ |
| old_chain = make_cleanup (null_cleanup, 0); |
| |
| /* Make sure that all storage allocated to SALS gets freed. */ |
| make_cleanup (xfree, sals.sals); |
| |
| /* Cleanup the addr_string array but not its contents. */ |
| make_cleanup (xfree, addr_string); |
| |
| /* Allocate space for all the cond expressions. */ |
| cond = xcalloc (sals.nelts, sizeof (struct expression *)); |
| make_cleanup (xfree, cond); |
| |
| /* Allocate space for all the cond strings. */ |
| cond_string = xcalloc (sals.nelts, sizeof (char **)); |
| make_cleanup (xfree, cond_string); |
| |
| /* ----------------------------- SNIP ----------------------------- |
| Anything added to the cleanup chain beyond this point is assumed |
| to be part of a breakpoint. If the breakpoint create succeeds |
| then the memory is not reclaimed. */ |
| breakpoint_chain = make_cleanup (null_cleanup, 0); |
| |
| /* Mark the contents of the addr_string for cleanup. These go on |
| the breakpoint_chain and only occure if the breakpoint create |
| fails. */ |
| for (i = 0; i < sals.nelts; i++) |
| { |
| if (addr_string[i] != NULL) |
| make_cleanup (xfree, addr_string[i]); |
| } |
| |
| /* Resolve all line numbers to PC's and verify that the addresses |
| are ok for the target. */ |
| breakpoint_sals_to_pc (&sals, addr_start); |
| |
| /* Verify that condition can be parsed, before setting any |
| breakpoints. Allocate a separate condition expression for each |
| breakpoint. */ |
| thread = -1; /* No specific thread yet */ |
| for (i = 0; i < sals.nelts; i++) |
| { |
| char *tok = arg; |
| while (tok && *tok) |
| { |
| char *end_tok; |
| int toklen; |
| char *cond_start = NULL; |
| char *cond_end = NULL; |
| while (*tok == ' ' || *tok == '\t') |
| tok++; |
| |
| end_tok = tok; |
| |
| while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000') |
| end_tok++; |
| |
| toklen = end_tok - tok; |
| |
| if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) |
| { |
| tok = cond_start = end_tok + 1; |
| cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0); |
| make_cleanup (xfree, cond[i]); |
| cond_end = tok; |
| cond_string[i] = savestring (cond_start, cond_end - cond_start); |
| make_cleanup (xfree, cond_string[i]); |
| } |
| else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0) |
| { |
| char *tmptok; |
| |
| tok = end_tok + 1; |
| tmptok = tok; |
| thread = strtol (tok, &tok, 0); |
| if (tok == tmptok) |
| error ("Junk after thread keyword."); |
| if (!valid_thread_id (thread)) |
| error ("Unknown thread %d\n", thread); |
| } |
| else |
| error ("Junk at end of arguments."); |
| } |
| } |
| |
| create_breakpoints (sals, addr_string, cond, cond_string, |
| hardwareflag ? bp_hardware_breakpoint : bp_breakpoint, |
| tempflag ? disp_del : disp_donttouch, |
| thread, ignore_count, from_tty); |
| |
| if (sals.nelts > 1) |
| { |
| warning ("Multiple breakpoints were set."); |
| warning ("Use the \"delete\" command to delete unwanted breakpoints."); |
| } |
| /* That's it. Discard the cleanups for data inserted into the |
| breakpoint. */ |
| discard_cleanups (breakpoint_chain); |
| /* But cleanup everything else. */ |
| do_cleanups (old_chain); |
| } |
| |
| /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function, |
| linenum or *address) with COND and IGNORE_COUNT. */ |
| |
| struct captured_breakpoint_args |
| { |
| char *address; |
| char *condition; |
| int hardwareflag; |
| int tempflag; |
| int thread; |
| int ignore_count; |
| }; |
| |
| static int |
| do_captured_breakpoint (void *data) |
| { |
| struct captured_breakpoint_args *args = data; |
| struct symtabs_and_lines sals; |
| register struct expression **cond; |
| struct cleanup *old_chain; |
| struct cleanup *breakpoint_chain = NULL; |
| int i; |
| char **addr_string; |
| char **cond_string; |
| |
| char *address_end; |
| |
| /* Parse the source and lines spec. Delay check that the expression |
| didn't contain trailing garbage until after cleanups are in |
| place. */ |
| sals.sals = NULL; |
| sals.nelts = 0; |
| address_end = args->address; |
| addr_string = NULL; |
| parse_breakpoint_sals (&address_end, &sals, &addr_string); |
| |
| if (!sals.nelts) |
| return GDB_RC_NONE; |
| |
| /* Create a chain of things at always need to be cleaned up. */ |
| old_chain = make_cleanup (null_cleanup, 0); |
| |
| /* Always have a addr_string array, even if it is empty. */ |
| make_cleanup (xfree, addr_string); |
| |
| /* Make sure that all storage allocated to SALS gets freed. */ |
| make_cleanup (xfree, sals.sals); |
| |
| /* Allocate space for all the cond expressions. */ |
| cond = xcalloc (sals.nelts, sizeof (struct expression *)); |
| make_cleanup (xfree, cond); |
| |
| /* Allocate space for all the cond strings. */ |
| cond_string = xcalloc (sals.nelts, sizeof (char **)); |
| make_cleanup (xfree, cond_string); |
| |
| /* ----------------------------- SNIP ----------------------------- |
| Anything added to the cleanup chain beyond this point is assumed |
| to be part of a breakpoint. If the breakpoint create goes |
| through then that memory is not cleaned up. */ |
| breakpoint_chain = make_cleanup (null_cleanup, 0); |
| |
| /* Mark the contents of the addr_string for cleanup. These go on |
| the breakpoint_chain and only occure if the breakpoint create |
| fails. */ |
| for (i = 0; i < sals.nelts; i++) |
| { |
| if (addr_string[i] != NULL) |
| make_cleanup (xfree, addr_string[i]); |
| } |
| |
| /* Wait until now before checking for garbage at the end of the |
| address. That way cleanups can take care of freeing any |
| memory. */ |
| if (*address_end != '\0') |
| error ("Garbage %s following breakpoint address", address_end); |
| |
| /* Resolve all line numbers to PC's. */ |
| breakpoint_sals_to_pc (&sals, args->address); |
| |
| /* Verify that conditions can be parsed, before setting any |
| breakpoints. */ |
| for (i = 0; i < sals.nelts; i++) |
| { |
| if (args->condition != NULL) |
| { |
| char *tok = args->condition; |
| cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0); |
| if (*tok != '\0') |
| error ("Garbage %s follows condition", tok); |
| make_cleanup (xfree, cond[i]); |
| cond_string[i] = xstrdup (args->condition); |
| } |
| } |
| |
| create_breakpoints (sals, addr_string, cond, cond_string, |
| args->hardwareflag ? bp_hardware_breakpoint : bp_breakpoint, |
| args->tempflag ? disp_del : disp_donttouch, |
| args->thread, args->ignore_count, 0/*from-tty*/); |
| |
| /* That's it. Discard the cleanups for data inserted into the |
| breakpoint. */ |
| discard_cleanups (breakpoint_chain); |
| /* But cleanup everything else. */ |
| do_cleanups (old_chain); |
| return GDB_RC_OK; |
| } |
| |
| enum gdb_rc |
| gdb_breakpoint (char *address, char *condition, |
| int hardwareflag, int tempflag, |
| int thread, int ignore_count) |
| { |
| struct captured_breakpoint_args args; |
| args.address = address; |
| args.condition = condition; |
| args.hardwareflag = hardwareflag; |
| args.tempflag = tempflag; |
| args.thread = thread; |
| args.ignore_count = ignore_count; |
| return catch_errors (do_captured_breakpoint, &args, |
| NULL, RETURN_MASK_ALL); |
| } |
| |
| |
| static void |
| break_at_finish_at_depth_command_1 (char *arg, int flag, int from_tty) |
| { |
| struct frame_info *frame; |
| CORE_ADDR low, high, selected_pc = 0; |
| char *extra_args = NULL; |
| char *level_arg; |
| char *addr_string; |
| int extra_args_len = 0, if_arg = 0; |
| |
| if (!arg || |
| (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t'))) |
| { |
| |
| if (default_breakpoint_valid) |
| { |
| if (deprecated_selected_frame) |
| { |
| selected_pc = get_frame_pc (deprecated_selected_frame); |
| if (arg) |
| if_arg = 1; |
| } |
| else |
| error ("No selected frame."); |
| } |
| else |
| error ("No default breakpoint address now."); |
| } |
| else |
| { |
| extra_args = strchr (arg, ' '); |
| if (extra_args) |
| { |
| extra_args++; |
| extra_args_len = strlen (extra_args); |
| level_arg = (char *) xmalloc (extra_args - arg); |
| strncpy (level_arg, arg, extra_args - arg - 1); |
| level_arg[extra_args - arg - 1] = '\0'; |
| } |
| else |
| { |
| level_arg = (char *) xmalloc (strlen (arg) + 1); |
| strcpy (level_arg, arg); |
| } |
| |
| frame = parse_frame_specification (level_arg); |
| if (frame) |
| selected_pc = get_frame_pc (frame); |
| else |
| selected_pc = 0; |
| } |
| if (if_arg) |
| { |
| extra_args = arg; |
| extra_args_len = strlen (arg); |
| } |
| |
| if (selected_pc) |
| { |
| if (find_pc_partial_function (selected_pc, (char **) NULL, &low, &high)) |
| { |
| addr_string = (char *) xmalloc (26 + extra_args_len); |
| if (extra_args_len) |
| sprintf (addr_string, "*0x%s %s", paddr_nz (high), extra_args); |
| else |
| sprintf (addr_string, "*0x%s", paddr_nz (high)); |
| break_command_1 (addr_string, flag, from_tty); |
| xfree (addr_string); |
| } |
| else |
| error ("No function contains the specified address"); |
| } |
| else |
| error ("Unable to set breakpoint at procedure exit"); |
| } |
| |
| |
| static void |
| break_at_finish_command_1 (char *arg, int flag, int from_tty) |
| { |
| char *addr_string, *break_string, *beg_addr_string; |
| CORE_ADDR low, high; |
| struct symtabs_and_lines sals; |
| struct symtab_and_line sal; |
| struct cleanup *old_chain; |
| char *extra_args = NULL; |
| int extra_args_len = 0; |
| int i, if_arg = 0; |
| |
| if (!arg || |
| (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t'))) |
| { |
| if (default_breakpoint_valid) |
| { |
| if (deprecated_selected_frame) |
| { |
| addr_string = (char *) xmalloc (15); |
| sprintf (addr_string, "*0x%s", |
| paddr_nz (get_frame_pc (deprecated_selected_frame))); |
| if (arg) |
| if_arg = 1; |
| } |
| else |
| error ("No selected frame."); |
| } |
| else |
| error ("No default breakpoint address now."); |
| } |
| else |
| { |
| addr_string = (char *) xmalloc (strlen (arg) + 1); |
| strcpy (addr_string, arg); |
| } |
| |
| if (if_arg) |
| { |
| extra_args = arg; |
| extra_args_len = strlen (arg); |
| } |
| else if (arg) |
| { |
| /* get the stuff after the function name or address */ |
| extra_args = strchr (arg, ' '); |
| if (extra_args) |
| { |
| extra_args++; |
| extra_args_len = strlen (extra_args); |
| } |
| } |
| |
| sals.sals = NULL; |
| sals.nelts = 0; |
| |
| beg_addr_string = addr_string; |
| sals = decode_line_1 (&addr_string, 1, (struct symtab *) NULL, 0, |
| (char ***) NULL); |
| |
| xfree (beg_addr_string); |
| old_chain = make_cleanup (xfree, sals.sals); |
| for (i = 0; (i < sals.nelts); i++) |
| { |
| sal = sals.sals[i]; |
| if (find_pc_partial_function (sal.pc, (char **) NULL, &low, &high)) |
| { |
| break_string = (char *) xmalloc (extra_args_len + 26); |
| if (extra_args_len) |
| sprintf (break_string, "*0x%s %s", paddr_nz (high), extra_args); |
| else |
| sprintf (break_string, "*0x%s", paddr_nz (high)); |
| break_command_1 (break_string, flag, from_tty); |
| xfree (break_string); |
| } |
| else |
| error ("No function contains the specified address"); |
| } |
| if (sals.nelts > 1) |
| { |
| warning ("Multiple breakpoints were set.\n"); |
| warning ("Use the \"delete\" command to delete unwanted breakpoints."); |
| } |
| do_cleanups (old_chain); |
| } |
| |
| |
| /* Helper function for break_command_1 and disassemble_command. */ |
| |
| void |
| resolve_sal_pc (struct symtab_and_line *sal) |
| { |
| CORE_ADDR pc; |
| |
| if (sal->pc == 0 && sal->symtab != NULL) |
| { |
| if (!find_line_pc (sal->symtab, sal->line, &pc)) |
| error ("No line %d in file \"%s\".", |
| sal->line, sal->symtab->filename); |
| sal->pc = pc; |
| } |
| |
| if (sal->section == 0 && sal->symtab != NULL) |
| { |
| struct blockvector *bv; |
| struct block *b; |
| struct symbol *sym; |
| int index; |
| |
| bv = blockvector_for_pc_sect (sal->pc, 0, &index, sal->symtab); |
| if (bv != NULL) |
| { |
| b = BLOCKVECTOR_BLOCK (bv, index); |
| sym = block_function (b); |
| if (sym != NULL) |
| { |
| fixup_symbol_section (sym, sal->symtab->objfile); |
| sal->section = SYMBOL_BFD_SECTION (sym); |
| } |
| else |
| { |
| /* It really is worthwhile to have the section, so we'll just |
| have to look harder. This case can be executed if we have |
| line numbers but no functions (as can happen in assembly |
| source). */ |
| |
| struct minimal_symbol *msym; |
| |
| msym = lookup_minimal_symbol_by_pc (sal->pc); |
| if (msym) |
| sal->section = SYMBOL_BFD_SECTION (msym); |
| } |
| } |
| } |
| } |
| |
| void |
| break_command (char *arg, int from_tty) |
| { |
| break_command_1 (arg, 0, from_tty); |
| } |
| |
| void |
| break_at_finish_command (char *arg, int from_tty) |
| { |
| break_at_finish_command_1 (arg, 0, from_tty); |
| } |
| |
| void |
| break_at_finish_at_depth_command (char *arg, int from_tty) |
| { |
| break_at_finish_at_depth_command_1 (arg, 0, from_tty); |
| } |
| |
| void |
| tbreak_command (char *arg, int from_tty) |
| { |
| break_command_1 (arg, BP_TEMPFLAG, from_tty); |
| } |
| |
| void |
| tbreak_at_finish_command (char *arg, int from_tty) |
| { |
| break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty); |
| } |
| |
| static void |
| hbreak_command (char *arg, int from_tty) |
| { |
| break_command_1 (arg, BP_HARDWAREFLAG, from_tty); |
| } |
| |
| static void |
| thbreak_command (char *arg, int from_tty) |
| { |
| break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty); |
| } |
| |
| static void |
| stop_command (char *arg, int from_tty) |
| { |
| printf_filtered ("Specify the type of breakpoint to set.\n\ |
| Usage: stop in <function | address>\n\ |
| stop at <line>\n"); |
| } |
| |
| static void |
| stopin_command (char *arg, int from_tty) |
| { |
| int badInput = 0; |
| |
| if (arg == (char *) NULL) |
| badInput = 1; |
| else if (*arg != '*') |
| { |
| char *argptr = arg; |
| int hasColon = 0; |
| |
| /* look for a ':'. If this is a line number specification, then |
| say it is bad, otherwise, it should be an address or |
| function/method name */ |
| while (*argptr && !hasColon) |
| { |
| hasColon = (*argptr == ':'); |
| argptr++; |
| } |
| |
| if (hasColon) |
| badInput = (*argptr != ':'); /* Not a class::method */ |
| else |
| badInput = isdigit (*arg); /* a simple line number */ |
| } |
| |
| if (badInput) |
| printf_filtered ("Usage: stop in <function | address>\n"); |
| else |
| break_command_1 (arg, 0, from_tty); |
| } |
| |
| static void |
| stopat_command (char *arg, int from_tty) |
| { |
| int badInput = 0; |
| |
| if (arg == (char *) NULL || *arg == '*') /* no line number */ |
| badInput = 1; |
| else |
| { |
| char *argptr = arg; |
| int hasColon = 0; |
| |
| /* look for a ':'. If there is a '::' then get out, otherwise |
| it is probably a line number. */ |
| while (*argptr && !hasColon) |
| { |
| hasColon = (*argptr == ':'); |
| argptr++; |
| } |
| |
| if (hasColon) |
| badInput = (*argptr == ':'); /* we have class::method */ |
| else |
| badInput = !isdigit (*arg); /* not a line number */ |
| } |
| |
| if (badInput) |
| printf_filtered ("Usage: stop at <line>\n"); |
| else |
| break_command_1 (arg, 0, from_tty); |
| } |
| |
| /* ARGSUSED */ |
| /* accessflag: hw_write: watch write, |
| hw_read: watch read, |
| hw_access: watch access (read or write) */ |
| static void |
| watch_command_1 (char *arg, int accessflag, int from_tty) |
| { |
| struct breakpoint *b; |
| struct symtab_and_line sal; |
| struct expression *exp; |
| struct block *exp_valid_block; |
| struct value *val, *mark; |
| struct frame_info *frame; |
| struct frame_info *prev_frame = NULL; |
| char *exp_start = NULL; |
| char *exp_end = NULL; |
| char *tok, *end_tok; |
| int toklen; |
| char *cond_start = NULL; |
| char *cond_end = NULL; |
| struct expression *cond = NULL; |
| int i, other_type_used, target_resources_ok = 0; |
| enum bptype bp_type; |
| int mem_cnt = 0; |
| |
| init_sal (&sal); /* initialize to zeroes */ |
| |
| /* Parse arguments. */ |
| innermost_block = NULL; |
| exp_start = arg; |
| exp = parse_exp_1 (&arg, 0, 0); |
| exp_end = arg; |
| exp_valid_block = innermost_block; |
| mark = value_mark (); |
| val = evaluate_expression (exp); |
| release_value (val); |
| if (VALUE_LAZY (val)) |
| value_fetch_lazy (val); |
| |
| tok = arg; |
| while (*tok == ' ' || *tok == '\t') |
| tok++; |
| end_tok = tok; |
| |
| while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000') |
| end_tok++; |
| |
| toklen = end_tok - tok; |
| if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) |
| { |
| tok = cond_start = end_tok + 1; |
| cond = parse_exp_1 (&tok, 0, 0); |
| cond_end = tok; |
| } |
| if (*tok) |
| error ("Junk at end of command."); |
| |
| if (accessflag == hw_read) |
| bp_type = bp_read_watchpoint; |
| else if (accessflag == hw_access) |
| bp_type = bp_access_watchpoint; |
| else |
| bp_type = bp_hardware_watchpoint; |
| |
| mem_cnt = can_use_hardware_watchpoint (val); |
| if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint) |
| error ("Expression cannot be implemented with read/access watchpoint."); |
| if (mem_cnt != 0) |
| { |
| i = hw_watchpoint_used_count (bp_type, &other_type_used); |
| target_resources_ok = |
| TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type, i + mem_cnt, |
| other_type_used); |
| if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint) |
| error ("Target does not support this type of hardware watchpoint."); |
| |
| if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint) |
| error ("Target can only support one kind of HW watchpoint at a time."); |
| } |
| |
| #if defined(HPUXHPPA) |
| /* On HP-UX if you set a h/w |
| watchpoint before the "run" command, the inferior dies with a e.g., |
| SIGILL once you start it. I initially believed this was due to a |
| bad interaction between page protection traps and the initial |
| startup sequence by the dynamic linker. |
| |
| However, I tried avoiding that by having HP-UX's implementation of |
| TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid |
| yet, which forced slow watches before a "run" or "attach", and it |
| still fails somewhere in the startup code. |
| |
| Until I figure out what's happening, I'm disallowing watches altogether |
| before the "run" or "attach" command. We'll tell the user they must |
| set watches after getting the program started. */ |
| if (!target_has_execution) |
| { |
| warning ("can't do that without a running program; try \"break main\", \"run\" first"); |
| return; |
| } |
| #endif /* HPUXHPPA */ |
| |
| /* Change the type of breakpoint to an ordinary watchpoint if a hardware |
| watchpoint could not be set. */ |
| if (!mem_cnt || target_resources_ok <= 0) |
| bp_type = bp_watchpoint; |
| |
| /* Now set up the breakpoint. */ |
| b = set_raw_breakpoint (sal, bp_type); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| b->disposition = disp_donttouch; |
| b->exp = exp; |
| b->exp_valid_block = exp_valid_block; |
| b->exp_string = savestring (exp_start, exp_end - exp_start); |
| b->val = val; |
| b->cond = cond; |
| if (cond_start) |
| b->cond_string = savestring (cond_start, cond_end - cond_start); |
| else |
| b->cond_string = 0; |
| |
| frame = block_innermost_frame (exp_valid_block); |
| if (frame) |
| { |
| prev_frame = get_prev_frame (frame); |
| b->watchpoint_frame = get_frame_id (frame); |
| } |
| else |
| { |
| memset (&b->watchpoint_frame, 0, sizeof (b->watchpoint_frame)); |
| } |
| |
| /* If the expression is "local", then set up a "watchpoint scope" |
| breakpoint at the point where we've left the scope of the watchpoint |
| expression. */ |
| if (innermost_block) |
| { |
| if (prev_frame) |
| { |
| struct breakpoint *scope_breakpoint; |
| scope_breakpoint = create_internal_breakpoint (get_frame_pc (prev_frame), |
| bp_watchpoint_scope); |
| |
| scope_breakpoint->enable_state = bp_enabled; |
| |
| /* Automatically delete the breakpoint when it hits. */ |
| scope_breakpoint->disposition = disp_del; |
| |
| /* Only break in the proper frame (help with recursion). */ |
| scope_breakpoint->frame_id = get_frame_id (prev_frame); |
| |
| /* Set the address at which we will stop. */ |
| scope_breakpoint->address = get_frame_pc (prev_frame); |
| |
| /* The scope breakpoint is related to the watchpoint. We |
| will need to act on them together. */ |
| b->related_breakpoint = scope_breakpoint; |
| } |
| } |
| value_free_to_mark (mark); |
| mention (b); |
| } |
| |
| /* Return count of locations need to be watched and can be handled |
| in hardware. If the watchpoint can not be handled |
| in hardware return zero. */ |
| |
| #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT) |
| #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \ |
| ((BYTE_SIZE) <= (REGISTER_SIZE)) |
| #endif |
| |
| #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT) |
| #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \ |
| (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN)) |
| #endif |
| |
| static int |
| can_use_hardware_watchpoint (struct value *v) |
| { |
| int found_memory_cnt = 0; |
| struct value *head = v; |
| |
| /* Did the user specifically forbid us to use hardware watchpoints? */ |
| if (!can_use_hw_watchpoints) |
| return 0; |
| |
| /* Make sure that the value of the expression depends only upon |
| memory contents, and values computed from them within GDB. If we |
| find any register references or function calls, we can't use a |
| hardware watchpoint. |
| |
| The idea here is that evaluating an expression generates a series |
| of values, one holding the value of every subexpression. (The |
| expression a*b+c has five subexpressions: a, b, a*b, c, and |
| a*b+c.) GDB's values hold almost enough information to establish |
| the criteria given above --- they identify memory lvalues, |
| register lvalues, computed values, etcetera. So we can evaluate |
| the expression, and then scan the chain of values that leaves |
| behind to decide whether we can detect any possible change to the |
| expression's final value using only hardware watchpoints. |
| |
| However, I don't think that the values returned by inferior |
| function calls are special in any way. So this function may not |
| notice that an expression involving an inferior function call |
| can't be watched with hardware watchpoints. FIXME. */ |
| for (; v; v = v->next) |
| { |
| if (VALUE_LVAL (v) == lval_memory) |
| { |
| if (VALUE_LAZY (v)) |
| /* A lazy memory lvalue is one that GDB never needed to fetch; |
| we either just used its address (e.g., `a' in `a.b') or |
| we never needed it at all (e.g., `a' in `a,b'). */ |
| ; |
| else |
| { |
| /* Ahh, memory we actually used! Check if we can cover |
| it with hardware watchpoints. */ |
| struct type *vtype = check_typedef (VALUE_TYPE (v)); |
| |
| /* We only watch structs and arrays if user asked for it |
| explicitly, never if they just happen to appear in a |
| middle of some value chain. */ |
| if (v == head |
| || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT |
| && TYPE_CODE (vtype) != TYPE_CODE_ARRAY)) |
| { |
| CORE_ADDR vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); |
| int len = TYPE_LENGTH (VALUE_TYPE (v)); |
| |
| if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr, len)) |
| return 0; |
| else |
| found_memory_cnt++; |
| } |
| } |
| } |
| else if (v->lval != not_lval && v->modifiable == 0) |
| return 0; /* ??? What does this represent? */ |
| else if (v->lval == lval_register) |
| return 0; /* cannot watch a register with a HW watchpoint */ |
| } |
| |
| /* The expression itself looks suitable for using a hardware |
| watchpoint, but give the target machine a chance to reject it. */ |
| return found_memory_cnt; |
| } |
| |
| void |
| watch_command_wrapper (char *arg, int from_tty) |
| { |
| watch_command (arg, from_tty); |
| } |
| |
| static void |
| watch_command (char *arg, int from_tty) |
| { |
| watch_command_1 (arg, hw_write, from_tty); |
| } |
| |
| void |
| rwatch_command_wrapper (char *arg, int from_tty) |
| { |
| rwatch_command (arg, from_tty); |
| } |
| |
| static void |
| rwatch_command (char *arg, int from_tty) |
| { |
| watch_command_1 (arg, hw_read, from_tty); |
| } |
| |
| void |
| awatch_command_wrapper (char *arg, int from_tty) |
| { |
| awatch_command (arg, from_tty); |
| } |
| |
| static void |
| awatch_command (char *arg, int from_tty) |
| { |
| watch_command_1 (arg, hw_access, from_tty); |
| } |
| |
| |
| /* Helper routines for the until_command routine in infcmd.c. Here |
| because it uses the mechanisms of breakpoints. */ |
| |
| /* This function is called by fetch_inferior_event via the |
| cmd_continuation pointer, to complete the until command. It takes |
| care of cleaning up the temporary breakpoints set up by the until |
| command. */ |
| static void |
| until_break_command_continuation (struct continuation_arg *arg) |
| { |
| struct cleanup *cleanups; |
| |
| cleanups = (struct cleanup *) arg->data.pointer; |
| do_exec_cleanups (cleanups); |
| } |
| |
| /* ARGSUSED */ |
| void |
| until_break_command (char *arg, int from_tty, int anywhere) |
| { |
| struct symtabs_and_lines sals; |
| struct symtab_and_line sal; |
| struct frame_info *prev_frame = get_prev_frame (deprecated_selected_frame); |
| struct breakpoint *breakpoint; |
| struct cleanup *old_chain; |
| struct continuation_arg *arg1; |
| |
| |
| clear_proceed_status (); |
| |
| /* Set a breakpoint where the user wants it and at return from |
| this function */ |
| |
| if (default_breakpoint_valid) |
| sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, |
| default_breakpoint_line, (char ***) NULL); |
| else |
| sals = decode_line_1 (&arg, 1, (struct symtab *) NULL, |
| 0, (char ***) NULL); |
| |
| if (sals.nelts != 1) |
| error ("Couldn't get information on specified line."); |
| |
| sal = sals.sals[0]; |
| xfree (sals.sals); /* malloc'd, so freed */ |
| |
| if (*arg) |
| error ("Junk at end of arguments."); |
| |
| resolve_sal_pc (&sal); |
| |
| if (anywhere) |
| /* If the user told us to continue until a specified location, |
| we don't specify a frame at which we need to stop. */ |
| breakpoint = set_momentary_breakpoint (sal, null_frame_id, bp_until); |
| else |
| /* Otherwise, specify the current frame, because we want to stop only |
| at the very same frame. */ |
| breakpoint = set_momentary_breakpoint (sal, |
| get_frame_id (deprecated_selected_frame), |
| bp_until); |
| |
| if (!event_loop_p || !target_can_async_p ()) |
| old_chain = make_cleanup_delete_breakpoint (breakpoint); |
| else |
| old_chain = make_exec_cleanup_delete_breakpoint (breakpoint); |
| |
| /* If we are running asynchronously, and the target supports async |
| execution, we are not waiting for the target to stop, in the call |
| tp proceed, below. This means that we cannot delete the |
| brekpoints until the target has actually stopped. The only place |
| where we get a chance to do that is in fetch_inferior_event, so |
| we must set things up for that. */ |
| |
| if (event_loop_p && target_can_async_p ()) |
| { |
| /* In this case the arg for the continuation is just the point |
| in the exec_cleanups chain from where to start doing |
| cleanups, because all the continuation does is the cleanups in |
| the exec_cleanup_chain. */ |
| arg1 = |
| (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
| arg1->next = NULL; |
| arg1->data.pointer = old_chain; |
| |
| add_continuation (until_break_command_continuation, arg1); |
| } |
| |
| /* Keep within the current frame, or in frames called by the current |
| one. */ |
| if (prev_frame) |
| { |
| sal = find_pc_line (get_frame_pc (prev_frame), 0); |
| sal.pc = get_frame_pc (prev_frame); |
| breakpoint = set_momentary_breakpoint (sal, get_frame_id (prev_frame), |
| bp_until); |
| if (!event_loop_p || !target_can_async_p ()) |
| make_cleanup_delete_breakpoint (breakpoint); |
| else |
| make_exec_cleanup_delete_breakpoint (breakpoint); |
| } |
| |
| proceed (-1, TARGET_SIGNAL_DEFAULT, 0); |
| /* Do the cleanups now, anly if we are not running asynchronously, |
| of if we are, but the target is still synchronous. */ |
| if (!event_loop_p || !target_can_async_p ()) |
| do_cleanups (old_chain); |
| } |
| |
| #if 0 |
| /* These aren't used; I don't konw what they were for. */ |
| /* Set a breakpoint at the catch clause for NAME. */ |
| static int |
| catch_breakpoint (char *name) |
| { |
| } |
| |
| static int |
| disable_catch_breakpoint (void) |
| { |
| } |
| |
| static int |
| delete_catch_breakpoint (void) |
| { |
| } |
| |
| static int |
| enable_catch_breakpoint (void) |
| { |
| } |
| #endif /* 0 */ |
| |
| struct sal_chain |
| { |
| struct sal_chain *next; |
| struct symtab_and_line sal; |
| }; |
| |
| #if 0 |
| /* Not really used -- invocation in handle_gnu_4_16_catch_command |
| had been commented out in the v.4.16 sources, and stays |
| disabled there now because "catch NAME" syntax isn't allowed. |
| pai/1997-07-11 */ |
| /* This isn't used; I don't know what it was for. */ |
| /* For each catch clause identified in ARGS, run FUNCTION |
| with that clause as an argument. */ |
| static struct symtabs_and_lines |
| map_catch_names (char *args, int (*function) ()) |
| { |
| register char *p = args; |
| register char *p1; |
| struct symtabs_and_lines sals; |
| #if 0 |
| struct sal_chain *sal_chain = 0; |
| #endif |
| |
| if (p == 0) |
| error_no_arg ("one or more catch names"); |
| |
| sals.nelts = 0; |
| sals.sals = NULL; |
| |
| while (*p) |
| { |
| p1 = p; |
| /* Don't swallow conditional part. */ |
| if (p1[0] == 'i' && p1[1] == 'f' |
| && (p1[2] == ' ' || p1[2] == '\t')) |
| break; |
| |
| if (isalpha (*p1)) |
| { |
| p1++; |
| while (isalnum (*p1) || *p1 == '_' || *p1 == '$') |
| p1++; |
| } |
| |
| if (*p1 && *p1 != ' ' && *p1 != '\t') |
| error ("Arguments must be catch names."); |
| |
| *p1 = 0; |
| #if 0 |
| if (function (p)) |
| { |
| struct sal_chain *next = (struct sal_chain *) |
| alloca (sizeof (struct sal_chain)); |
| next->next = sal_chain; |
| next->sal = get_catch_sal (p); |
| sal_chain = next; |
| goto win; |
| } |
| #endif |
| printf_unfiltered ("No catch clause for exception %s.\n", p); |
| #if 0 |
| win: |
| #endif |
| p = p1; |
| while (*p == ' ' || *p == '\t') |
| p++; |
| } |
| } |
| #endif |
| |
| /* This shares a lot of code with `print_frame_label_vars' from stack.c. */ |
| |
| static struct symtabs_and_lines |
| get_catch_sals (int this_level_only) |
| { |
| register struct blockvector *bl; |
| register struct block *block; |
| int index, have_default = 0; |
| CORE_ADDR pc; |
| struct symtabs_and_lines sals; |
| struct sal_chain *sal_chain = 0; |
| char *blocks_searched; |
| |
| /* Not sure whether an error message is always the correct response, |
| but it's better than a core dump. */ |
| if (deprecated_selected_frame == NULL) |
| error ("No selected frame."); |
| block = get_frame_block (deprecated_selected_frame, 0); |
| pc = get_frame_pc (deprecated_selected_frame); |
| |
| sals.nelts = 0; |
| sals.sals = NULL; |
| |
| if (block == 0) |
| error ("No symbol table info available.\n"); |
| |
| bl = blockvector_for_pc (BLOCK_END (block) - 4, &index); |
| blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
| memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
| |
| while (block != 0) |
| { |
| CORE_ADDR end = BLOCK_END (block) - 4; |
| int last_index; |
| |
| if (bl != blockvector_for_pc (end, &index)) |
| error ("blockvector blotch"); |
| if (BLOCKVECTOR_BLOCK (bl, index) != block) |
| error ("blockvector botch"); |
| last_index = BLOCKVECTOR_NBLOCKS (bl); |
| index += 1; |
| |
| /* Don't print out blocks that have gone by. */ |
| while (index < last_index |
| && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc) |
| index++; |
| |
| while (index < last_index |
| && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end) |
| { |
| if (blocks_searched[index] == 0) |
| { |
| struct block *b = BLOCKVECTOR_BLOCK (bl, index); |
| register int i; |
| register struct symbol *sym; |
| |
| ALL_BLOCK_SYMBOLS (b, i, sym) |
| { |
| if (STREQ (DEPRECATED_SYMBOL_NAME (sym), "default")) |
| { |
| if (have_default) |
| continue; |
| have_default = 1; |
| } |
| if (SYMBOL_CLASS (sym) == LOC_LABEL) |
| { |
| struct sal_chain *next = (struct sal_chain *) |
| alloca (sizeof (struct sal_chain)); |
| next->next = sal_chain; |
| next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), |
| 0); |
| sal_chain = next; |
| } |
| } |
| blocks_searched[index] = 1; |
| } |
| index++; |
| } |
| if (have_default) |
| break; |
| if (sal_chain && this_level_only) |
| break; |
| |
| /* After handling the function's top-level block, stop. |
| Don't continue to its superblock, the block of |
| per-file symbols. */ |
| if (BLOCK_FUNCTION (block)) |
| break; |
| block = BLOCK_SUPERBLOCK (block); |
| } |
| |
| if (sal_chain) |
| { |
| struct sal_chain *tmp_chain; |
| |
| /* Count the number of entries. */ |
| for (index = 0, tmp_chain = sal_chain; tmp_chain; |
| tmp_chain = tmp_chain->next) |
| index++; |
| |
| sals.nelts = index; |
| sals.sals = (struct symtab_and_line *) |
| xmalloc (index * sizeof (struct symtab_and_line)); |
| for (index = 0; sal_chain; sal_chain = sal_chain->next, index++) |
| sals.sals[index] = sal_chain->sal; |
| } |
| |
| return sals; |
| } |
| |
| static void |
| ep_skip_leading_whitespace (char **s) |
| { |
| if ((s == NULL) || (*s == NULL)) |
| return; |
| while (isspace (**s)) |
| *s += 1; |
| } |
| |
| /* This function examines a string, and attempts to find a token |
| that might be an event name in the leading characters. If a |
| possible match is found, a pointer to the last character of |
| the token is returned. Else, NULL is returned. */ |
| |
| static char * |
| ep_find_event_name_end (char *arg) |
| { |
| char *s = arg; |
| char *event_name_end = NULL; |
| |
| /* If we could depend upon the presense of strrpbrk, we'd use that... */ |
| if (arg == NULL) |
| return NULL; |
| |
| /* We break out of the loop when we find a token delimiter. |
| Basically, we're looking for alphanumerics and underscores; |
| anything else delimites the token. */ |
| while (*s != '\0') |
| { |
| if (!isalnum (*s) && (*s != '_')) |
| break; |
| event_name_end = s; |
| s++; |
| } |
| |
| return event_name_end; |
| } |
| |
| |
| /* This function attempts to parse an optional "if <cond>" clause |
| from the arg string. If one is not found, it returns NULL. |
| |
| Else, it returns a pointer to the condition string. (It does not |
| attempt to evaluate the string against a particular block.) And, |
| it updates arg to point to the first character following the parsed |
| if clause in the arg string. */ |
| |
| static char * |
| ep_parse_optional_if_clause (char **arg) |
| { |
| char *cond_string; |
| |
| if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2])) |
| return NULL; |
| |
| /* Skip the "if" keyword. */ |
| (*arg) += 2; |
| |
| /* Skip any extra leading whitespace, and record the start of the |
| condition string. */ |
| ep_skip_leading_whitespace (arg); |
| cond_string = *arg; |
| |
| /* Assume that the condition occupies the remainder of the arg string. */ |
| (*arg) += strlen (cond_string); |
| |
| return cond_string; |
| } |
| |
| /* This function attempts to parse an optional filename from the arg |
| string. If one is not found, it returns NULL. |
| |
| Else, it returns a pointer to the parsed filename. (This function |
| makes no attempt to verify that a file of that name exists, or is |
| accessible.) And, it updates arg to point to the first character |
| following the parsed filename in the arg string. |
| |
| Note that clients needing to preserve the returned filename for |
| future access should copy it to their own buffers. */ |
| static char * |
| ep_parse_optional_filename (char **arg) |
| { |
| static char filename[1024]; |
| char *arg_p = *arg; |
| int i; |
| char c; |
| |
| if ((*arg_p == '\0') || isspace (*arg_p)) |
| return NULL; |
| |
| for (i = 0;; i++) |
| { |
| c = *arg_p; |
| if (isspace (c)) |
| c = '\0'; |
| filename[i] = c; |
| if (c == '\0') |
| break; |
| arg_p++; |
| } |
| *arg = arg_p; |
| |
| return filename; |
| } |
| |
| /* Commands to deal with catching events, such as signals, exceptions, |
| process start/exit, etc. */ |
| |
| typedef enum |
| { |
| catch_fork, catch_vfork |
| } |
| catch_fork_kind; |
| |
| #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT) |
| static void catch_fork_command_1 (catch_fork_kind fork_kind, |
| char *arg, int tempflag, int from_tty); |
| |
| static void |
| catch_fork_command_1 (catch_fork_kind fork_kind, char *arg, int tempflag, |
| int from_tty) |
| { |
| char *cond_string = NULL; |
| |
| ep_skip_leading_whitespace (&arg); |
| |
| /* The allowed syntax is: |
| catch [v]fork |
| catch [v]fork if <cond> |
| |
| First, check if there's an if clause. */ |
| cond_string = ep_parse_optional_if_clause (&arg); |
| |
| if ((*arg != '\0') && !isspace (*arg)) |
| error ("Junk at end of arguments."); |
| |
| /* If this target supports it, create a fork or vfork catchpoint |
| and enable reporting of such events. */ |
| switch (fork_kind) |
| { |
| case catch_fork: |
| create_fork_event_catchpoint (tempflag, cond_string); |
| break; |
| case catch_vfork: |
| create_vfork_event_catchpoint (tempflag, cond_string); |
| break; |
| default: |
| error ("unsupported or unknown fork kind; cannot catch it"); |
| break; |
| } |
| } |
| #endif |
| |
| #if defined(CHILD_INSERT_EXEC_CATCHPOINT) |
| static void |
| catch_exec_command_1 (char *arg, int tempflag, int from_tty) |
| { |
| char *cond_string = NULL; |
| |
| ep_skip_leading_whitespace (&arg); |
| |
| /* The allowed syntax is: |
| catch exec |
| catch exec if <cond> |
| |
| First, check if there's an if clause. */ |
| cond_string = ep_parse_optional_if_clause (&arg); |
| |
| if ((*arg != '\0') && !isspace (*arg)) |
| error ("Junk at end of arguments."); |
| |
| /* If this target supports it, create an exec catchpoint |
| and enable reporting of such events. */ |
| create_exec_event_catchpoint (tempflag, cond_string); |
| } |
| #endif |
| |
| #if defined(SOLIB_ADD) |
| static void |
| catch_load_command_1 (char *arg, int tempflag, int from_tty) |
| { |
| char *dll_pathname = NULL; |
| char *cond_string = NULL; |
| |
| ep_skip_leading_whitespace (&arg); |
| |
| /* The allowed syntax is: |
| catch load |
| catch load if <cond> |
| catch load <filename> |
| catch load <filename> if <cond> |
| |
| The user is not allowed to specify the <filename> after an |
| if clause. |
| |
| We'll ignore the pathological case of a file named "if". |
| |
| First, check if there's an if clause. If so, then there |
| cannot be a filename. */ |
| cond_string = ep_parse_optional_if_clause (&arg); |
| |
| /* If there was an if clause, then there cannot be a filename. |
| Else, there might be a filename and an if clause. */ |
| if (cond_string == NULL) |
| { |
| dll_pathname = ep_parse_optional_filename (&arg); |
| ep_skip_leading_whitespace (&arg); |
| cond_string = ep_parse_optional_if_clause (&arg); |
| } |
| |
| if ((*arg != '\0') && !isspace (*arg)) |
| error ("Junk at end of arguments."); |
| |
| /* Create a load breakpoint that only triggers when a load of |
| the specified dll (or any dll, if no pathname was specified) |
| occurs. */ |
| SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid), tempflag, |
| dll_pathname, cond_string); |
| } |
| |
| static void |
| catch_unload_command_1 (char *arg, int tempflag, int from_tty) |
| { |
| char *dll_pathname = NULL; |
| char *cond_string = NULL; |
| |
| ep_skip_leading_whitespace (&arg); |
| |
| /* The allowed syntax is: |
| catch unload |
| catch unload if <cond> |
| catch unload <filename> |
| catch unload <filename> if <cond> |
| |
| The user is not allowed to specify the <filename> after an |
| if clause. |
| |
| We'll ignore the pathological case of a file named "if". |
| |
| First, check if there's an if clause. If so, then there |
| cannot be a filename. */ |
| cond_string = ep_parse_optional_if_clause (&arg); |
| |
| /* If there was an if clause, then there cannot be a filename. |
| Else, there might be a filename and an if clause. */ |
| if (cond_string == NULL) |
| { |
| dll_pathname = ep_parse_optional_filename (&arg); |
| ep_skip_leading_whitespace (&arg); |
| cond_string = ep_parse_optional_if_clause (&arg); |
| } |
| |
| if ((*arg != '\0') && !isspace (*arg)) |
| error ("Junk at end of arguments."); |
| |
| /* Create an unload breakpoint that only triggers when an unload of |
| the specified dll (or any dll, if no pathname was specified) |
| occurs. */ |
| SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid), tempflag, |
| dll_pathname, cond_string); |
| } |
| #endif /* SOLIB_ADD */ |
| |
| /* Commands to deal with catching exceptions. */ |
| |
| /* Set a breakpoint at the specified callback routine for an |
| exception event callback */ |
| |
| static void |
| create_exception_catchpoint (int tempflag, char *cond_string, |
| enum exception_event_kind ex_event, |
| struct symtab_and_line *sal) |
| { |
| struct breakpoint *b; |
| int thread = -1; /* All threads. */ |
| enum bptype bptype; |
| |
| if (!sal) /* no exception support? */ |
| return; |
| |
| switch (ex_event) |
| { |
| case EX_EVENT_THROW: |
| bptype = bp_catch_throw; |
| break; |
| case EX_EVENT_CATCH: |
| bptype = bp_catch_catch; |
| break; |
| default: /* error condition */ |
| error ("Internal error -- invalid catchpoint kind"); |
| } |
| |
| b = set_raw_breakpoint (*sal, bptype); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| b->cond = NULL; |
| b->cond_string = (cond_string == NULL) ? |
| NULL : savestring (cond_string, strlen (cond_string)); |
| b->thread = thread; |
| b->addr_string = NULL; |
| b->enable_state = bp_enabled; |
| b->disposition = tempflag ? disp_del : disp_donttouch; |
| mention (b); |
| } |
| |
| /* Deal with "catch catch" and "catch throw" commands */ |
| |
| static void |
| catch_exception_command_1 (enum exception_event_kind ex_event, char *arg, |
| int tempflag, int from_tty) |
| { |
| char *cond_string = NULL; |
| struct symtab_and_line *sal = NULL; |
| |
| ep_skip_leading_whitespace (&arg); |
| |
| cond_string = ep_parse_optional_if_clause (&arg); |
| |
| if ((*arg != '\0') && !isspace (*arg)) |
| error ("Junk at end of arguments."); |
| |
| if ((ex_event != EX_EVENT_THROW) && |
| (ex_event != EX_EVENT_CATCH)) |
| error ("Unsupported or unknown exception event; cannot catch it"); |
| |
| /* See if we can find a callback routine */ |
| sal = target_enable_exception_callback (ex_event, 1); |
| |
| if (sal) |
| { |
| /* We have callbacks from the runtime system for exceptions. |
| Set a breakpoint on the sal found, if no errors */ |
| if (sal != (struct symtab_and_line *) -1) |
| create_exception_catchpoint (tempflag, cond_string, ex_event, sal); |
| else |
| return; /* something went wrong with setting up callbacks */ |
| } |
| else |
| { |
| /* No callbacks from runtime system for exceptions. |
| Try GNU C++ exception breakpoints using labels in debug info. */ |
| if (ex_event == EX_EVENT_CATCH) |
| { |
| handle_gnu_4_16_catch_command (arg, tempflag, from_tty); |
| } |
| else if (ex_event == EX_EVENT_THROW) |
| { |
| /* Set a breakpoint on __raise_exception () */ |
| |
| warning ("Unsupported with this platform/compiler combination."); |
| warning ("Perhaps you can achieve the effect you want by setting"); |
| warning ("a breakpoint on __raise_exception()."); |
| } |
| } |
| } |
| |
| /* Cover routine to allow wrapping target_enable_exception_catchpoints |
| inside a catch_errors */ |
| |
| static int |
| cover_target_enable_exception_callback (void *arg) |
| { |
| args_for_catchpoint_enable *args = arg; |
| struct symtab_and_line *sal; |
| sal = target_enable_exception_callback (args->kind, args->enable_p); |
| if (sal == NULL) |
| return 0; |
| else if (sal == (struct symtab_and_line *) -1) |
| return -1; |
| else |
| return 1; /*is valid */ |
| } |
| |
| |
| |
| /* This is the original v.4.16 and earlier version of the |
| catch_command_1() function. Now that other flavours of "catch" |
| have been introduced, and since exception handling can be handled |
| in other ways (through target ops) also, this is used only for the |
| GNU C++ exception handling system. |
| Note: Only the "catch" flavour of GDB 4.16 is handled here. The |
| "catch NAME" is now no longer allowed in catch_command_1(). Also, |
| there was no code in GDB 4.16 for "catch throw". |
| |
| Called from catch_exception_command_1 () */ |
| |
| |
| static void |
| handle_gnu_4_16_catch_command (char *arg, int tempflag, int from_tty) |
| { |
| /* First, translate ARG into something we can deal with in terms |
| of breakpoints. */ |
| |
| struct symtabs_and_lines sals; |
| struct symtab_and_line sal; |
| register struct expression *cond = 0; |
| register struct breakpoint *b; |
| char *save_arg; |
| int i; |
| |
| init_sal (&sal); /* initialize to zeroes */ |
| |
| /* If no arg given, or if first arg is 'if ', all active catch clauses |
| are breakpointed. */ |
| |
| if (!arg || (arg[0] == 'i' && arg[1] == 'f' |
| && (arg[2] == ' ' || arg[2] == '\t'))) |
| { |
| /* Grab all active catch clauses. */ |
| sals = get_catch_sals (0); |
| } |
| else |
| { |
| /* Grab selected catch clauses. */ |
| error ("catch NAME not implemented"); |
| |
| #if 0 |
| /* Not sure why this code has been disabled. I'm leaving |
| it disabled. We can never come here now anyway |
| since we don't allow the "catch NAME" syntax. |
| pai/1997-07-11 */ |
| |
| /* This isn't used; I don't know what it was for. */ |
| sals = map_catch_names (arg, catch_breakpoint); |
| #endif |
| } |
| |
| if (!sals.nelts) |
| return; |
| |
| save_arg = arg; |
| for (i = 0; i < sals.nelts; i++) |
| { |
| resolve_sal_pc (&sals.sals[i]); |
| |
| while (arg && *arg) |
| { |
| if (arg[0] == 'i' && arg[1] == 'f' |
| && (arg[2] == ' ' || arg[2] == '\t')) |
| cond = parse_exp_1 ((arg += 2, &arg), |
| block_for_pc (sals.sals[i].pc), 0); |
| else |
| error ("Junk at end of arguments."); |
| } |
| arg = save_arg; |
| } |
| |
| for (i = 0; i < sals.nelts; i++) |
| { |
| sal = sals.sals[i]; |
| |
| if (from_tty) |
| describe_other_breakpoints (sal.pc, sal.section); |
| |
| /* Important -- this is an ordinary breakpoint. For platforms |
| with callback support for exceptions, |
| create_exception_catchpoint() will create special bp types |
| (bp_catch_catch and bp_catch_throw), and there is code in |
| insert_breakpoints() and elsewhere that depends on that. */ |
| b = set_raw_breakpoint (sal, bp_breakpoint); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| |
| b->cond = cond; |
| b->enable_state = bp_enabled; |
| b->disposition = tempflag ? disp_del : disp_donttouch; |
| |
| mention (b); |
| } |
| |
| if (sals.nelts > 1) |
| { |
| warning ("Multiple breakpoints were set."); |
| warning ("Use the \"delete\" command to delete unwanted breakpoints."); |
| } |
| xfree (sals.sals); |
| } |
| |
| static void |
| catch_command_1 (char *arg, int tempflag, int from_tty) |
| { |
| |
| /* The first argument may be an event name, such as "start" or "load". |
| If so, then handle it as such. If it doesn't match an event name, |
| then attempt to interpret it as an exception name. (This latter is |
| the v4.16-and-earlier GDB meaning of the "catch" command.) |
| |
| First, try to find the bounds of what might be an event name. */ |
| char *arg1_start = arg; |
| char *arg1_end; |
| int arg1_length; |
| |
| if (arg1_start == NULL) |
| { |
| /* Old behaviour was to use pre-v-4.16 syntax */ |
| /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */ |
| /* return; */ |
| /* Now, this is not allowed */ |
| error ("Catch requires an event name."); |
| |
| } |
| arg1_end = ep_find_event_name_end (arg1_start); |
| if (arg1_end == NULL) |
| error ("catch requires an event"); |
| arg1_length = arg1_end + 1 - arg1_start; |
| |
| /* Try to match what we found against known event names. */ |
| if (strncmp (arg1_start, "signal", arg1_length) == 0) |
| { |
| error ("Catch of signal not yet implemented"); |
| } |
| else if (strncmp (arg1_start, "catch", arg1_length) == 0) |
| { |
| catch_exception_command_1 (EX_EVENT_CATCH, arg1_end + 1, |
| tempflag, from_tty); |
| } |
| else if (strncmp (arg1_start, "throw", arg1_length) == 0) |
| { |
| catch_exception_command_1 (EX_EVENT_THROW, arg1_end + 1, |
| tempflag, from_tty); |
| } |
| else if (strncmp (arg1_start, "thread_start", arg1_length) == 0) |
| { |
| error ("Catch of thread_start not yet implemented"); |
| } |
| else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0) |
| { |
| error ("Catch of thread_exit not yet implemented"); |
| } |
| else if (strncmp (arg1_start, "thread_join", arg1_length) == 0) |
| { |
| error ("Catch of thread_join not yet implemented"); |
| } |
| else if (strncmp (arg1_start, "start", arg1_length) == 0) |
| { |
| error ("Catch of start not yet implemented"); |
| } |
| else if (strncmp (arg1_start, "exit", arg1_length) == 0) |
| { |
| error ("Catch of exit not yet implemented"); |
| } |
| else if (strncmp (arg1_start, "fork", arg1_length) == 0) |
| { |
| #if defined(CHILD_INSERT_FORK_CATCHPOINT) |
| catch_fork_command_1 (catch_fork, arg1_end + 1, tempflag, from_tty); |
| #else |
| error ("Catch of fork not yet implemented"); |
| #endif |
| } |
| else if (strncmp (arg1_start, "vfork", arg1_length) == 0) |
| { |
| #if defined(CHILD_INSERT_VFORK_CATCHPOINT) |
| catch_fork_command_1 (catch_vfork, arg1_end + 1, tempflag, from_tty); |
| #else |
| error ("Catch of vfork not yet implemented"); |
| #endif |
| } |
| else if (strncmp (arg1_start, "exec", arg1_length) == 0) |
| { |
| #if defined(CHILD_INSERT_EXEC_CATCHPOINT) |
| catch_exec_command_1 (arg1_end + 1, tempflag, from_tty); |
| #else |
| error ("Catch of exec not yet implemented"); |
| #endif |
| } |
| else if (strncmp (arg1_start, "load", arg1_length) == 0) |
| { |
| #if defined(SOLIB_ADD) |
| catch_load_command_1 (arg1_end + 1, tempflag, from_tty); |
| #else |
| error ("Catch of load not implemented"); |
| #endif |
| } |
| else if (strncmp (arg1_start, "unload", arg1_length) == 0) |
| { |
| #if defined(SOLIB_ADD) |
| catch_unload_command_1 (arg1_end + 1, tempflag, from_tty); |
| #else |
| error ("Catch of load not implemented"); |
| #endif |
| } |
| else if (strncmp (arg1_start, "stop", arg1_length) == 0) |
| { |
| error ("Catch of stop not yet implemented"); |
| } |
| |
| /* This doesn't appear to be an event name */ |
| |
| else |
| { |
| /* Pre-v.4.16 behaviour was to treat the argument |
| as the name of an exception */ |
| /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */ |
| /* Now this is not allowed */ |
| error ("Unknown event kind specified for catch"); |
| |
| } |
| } |
| |
| /* Used by the gui, could be made a worker for other things. */ |
| |
| struct breakpoint * |
| set_breakpoint_sal (struct symtab_and_line sal) |
| { |
| struct breakpoint *b; |
| b = set_raw_breakpoint (sal, bp_breakpoint); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| b->cond = 0; |
| b->thread = -1; |
| return b; |
| } |
| |
| #if 0 |
| /* These aren't used; I don't know what they were for. */ |
| /* Disable breakpoints on all catch clauses described in ARGS. */ |
| static void |
| disable_catch (char *args) |
| { |
| /* Map the disable command to catch clauses described in ARGS. */ |
| } |
| |
| /* Enable breakpoints on all catch clauses described in ARGS. */ |
| static void |
| enable_catch (char *args) |
| { |
| /* Map the disable command to catch clauses described in ARGS. */ |
| } |
| |
| /* Delete breakpoints on all catch clauses in the active scope. */ |
| static void |
| delete_catch (char *args) |
| { |
| /* Map the delete command to catch clauses described in ARGS. */ |
| } |
| #endif /* 0 */ |
| |
| static void |
| catch_command (char *arg, int from_tty) |
| { |
| catch_command_1 (arg, 0, from_tty); |
| } |
| |
| |
| static void |
| tcatch_command (char *arg, int from_tty) |
| { |
| catch_command_1 (arg, 1, from_tty); |
| } |
| |
| /* Delete breakpoints by address or line. */ |
| |
| static void |
| clear_command (char *arg, int from_tty) |
| { |
| struct breakpoint *b, *tmp, *prev, *found; |
| int default_match; |
| struct symtabs_and_lines sals; |
| struct symtab_and_line sal; |
| int i; |
| |
| if (arg) |
| { |
| sals = decode_line_spec (arg, 1); |
| default_match = 0; |
| } |
| else |
| { |
| sals.sals = (struct symtab_and_line *) |
| xmalloc (sizeof (struct symtab_and_line)); |
| make_cleanup (xfree, sals.sals); |
| init_sal (&sal); /* initialize to zeroes */ |
| sal.line = default_breakpoint_line; |
| sal.symtab = default_breakpoint_symtab; |
| sal.pc = default_breakpoint_address; |
| if (sal.symtab == 0) |
| error ("No source file specified."); |
| |
| sals.sals[0] = sal; |
| sals.nelts = 1; |
| |
| default_match = 1; |
| } |
| |
| /* For each line spec given, delete bps which correspond |
| to it. Do it in two passes, solely to preserve the current |
| behavior that from_tty is forced true if we delete more than |
| one breakpoint. */ |
| |
| found = NULL; |
| for (i = 0; i < sals.nelts; i++) |
| { |
| /* If exact pc given, clear bpts at that pc. |
| If line given (pc == 0), clear all bpts on specified line. |
| If defaulting, clear all bpts on default line |
| or at default pc. |
| |
| defaulting sal.pc != 0 tests to do |
| |
| 0 1 pc |
| 1 1 pc _and_ line |
| 0 0 line |
| 1 0 <can't happen> */ |
| |
| sal = sals.sals[i]; |
| prev = NULL; |
| |
| /* Find all matching breakpoints, remove them from the |
| breakpoint chain, and add them to the 'found' chain. */ |
| ALL_BREAKPOINTS_SAFE (b, tmp) |
| { |
| /* Are we going to delete b? */ |
| if (b->type != bp_none |
| && b->type != bp_watchpoint |
| && b->type != bp_hardware_watchpoint |
| && b->type != bp_read_watchpoint |
| && b->type != bp_access_watchpoint |
| /* Not if b is a watchpoint of any sort... */ |
| && (((sal.pc && (b->address == sal.pc)) |
| && (!section_is_overlay (b->section) |
| || b->section == sal.section)) |
| /* Yes, if sal.pc matches b (modulo overlays). */ |
| || ((default_match || (0 == sal.pc)) |
| && b->source_file != NULL |
| && sal.symtab != NULL |
| && STREQ (b->source_file, sal.symtab->filename) |
| && b->line_number == sal.line))) |
| /* Yes, if sal source file and line matches b. */ |
| { |
| /* Remove it from breakpoint_chain... */ |
| if (b == breakpoint_chain) |
| { |
| /* b is at the head of the list */ |
| breakpoint_chain = b->next; |
| } |
| else |
| { |
| prev->next = b->next; |
| } |
| /* And add it to 'found' chain. */ |
| b->next = found; |
| found = b; |
| } |
| else |
| { |
| /* Keep b, and keep a pointer to it. */ |
| prev = b; |
| } |
| } |
| } |
| /* Now go thru the 'found' chain and delete them. */ |
| if (found == 0) |
| { |
| if (arg) |
| error ("No breakpoint at %s.", arg); |
| else |
| error ("No breakpoint at this line."); |
| } |
| |
| if (found->next) |
| from_tty = 1; /* Always report if deleted more than one */ |
| if (from_tty) |
| printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : ""); |
| breakpoints_changed (); |
| while (found) |
| { |
| if (from_tty) |
| printf_unfiltered ("%d ", found->number); |
| tmp = found->next; |
| delete_breakpoint (found); |
| found = tmp; |
| } |
| if (from_tty) |
| putchar_unfiltered ('\n'); |
| } |
| |
| /* Delete breakpoint in BS if they are `delete' breakpoints and |
| all breakpoints that are marked for deletion, whether hit or not. |
| This is called after any breakpoint is hit, or after errors. */ |
| |
| void |
| breakpoint_auto_delete (bpstat bs) |
| { |
| struct breakpoint *b, *temp; |
| |
| for (; bs; bs = bs->next) |
| if (bs->breakpoint_at && bs->breakpoint_at->disposition == disp_del |
| && bs->stop) |
| delete_breakpoint (bs->breakpoint_at); |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| if (b->disposition == disp_del_at_next_stop) |
| delete_breakpoint (b); |
| } |
| } |
| |
| /* Delete a breakpoint and clean up all traces of it in the data |
| structures. */ |
| |
| void |
| delete_breakpoint (struct breakpoint *bpt) |
| { |
| register struct breakpoint *b; |
| register bpstat bs; |
| |
| if (bpt == NULL) |
| error ("Internal error (attempted to delete a NULL breakpoint)"); |
| |
| |
| /* Has this bp already been deleted? This can happen because multiple |
| lists can hold pointers to bp's. bpstat lists are especial culprits. |
| |
| One example of this happening is a watchpoint's scope bp. When the |
| scope bp triggers, we notice that the watchpoint is out of scope, and |
| delete it. We also delete its scope bp. But the scope bp is marked |
| "auto-deleting", and is already on a bpstat. That bpstat is then |
| checked for auto-deleting bp's, which are deleted. |
| |
| A real solution to this problem might involve reference counts in bp's, |
| and/or giving them pointers back to their referencing bpstat's, and |
| teaching delete_breakpoint to only free a bp's storage when no more |
| references were extent. A cheaper bandaid was chosen. */ |
| if (bpt->type == bp_none) |
| return; |
| |
| if (delete_breakpoint_hook) |
| delete_breakpoint_hook (bpt); |
| breakpoint_delete_event (bpt->number); |
| |
| if (bpt->inserted) |
| remove_breakpoint (bpt, mark_inserted); |
| |
| if (breakpoint_chain == bpt) |
| breakpoint_chain = bpt->next; |
| |
| /* If we have callback-style exception catchpoints, don't go through |
| the adjustments to the C++ runtime library etc. if the inferior |
| isn't actually running. target_enable_exception_callback for a |
| null target ops vector gives an undesirable error message, so we |
| check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's |
| exceptions are supported in this way, it's OK for now. FIXME */ |
| if (ep_is_exception_catchpoint (bpt) && target_has_execution) |
| { |
| static char message1[] = "Error in deleting catchpoint %d:\n"; |
| static char message[sizeof (message1) + 30]; |
| args_for_catchpoint_enable args; |
| |
| /* Format possible error msg */ |
| sprintf (message, message1, bpt->number); |
| args.kind = bpt->type == bp_catch_catch ? |
| EX_EVENT_CATCH : EX_EVENT_THROW; |
| args.enable_p = 0; |
| catch_errors (cover_target_enable_exception_callback, &args, |
| message, RETURN_MASK_ALL); |
| } |
| |
| |
| ALL_BREAKPOINTS (b) |
| if (b->next == bpt) |
| { |
| b->next = bpt->next; |
| break; |
| } |
| |
| check_duplicates (bpt); |
| /* If this breakpoint was inserted, and there is another breakpoint |
| at the same address, we need to insert the other breakpoint. */ |
| if (bpt->inserted |
| && bpt->type != bp_hardware_watchpoint |
| && bpt->type != bp_read_watchpoint |
| && bpt->type != bp_access_watchpoint |
| && bpt->type != bp_catch_fork |
| && bpt->type != bp_catch_vfork |
| && bpt->type != bp_catch_exec) |
| { |
| ALL_BREAKPOINTS (b) |
| if (b->address == bpt->address |
| && b->section == bpt->section |
| && !b->duplicate |
| && b->enable_state != bp_disabled |
| && b->enable_state != bp_shlib_disabled |
| && b->enable_state != bp_call_disabled) |
| { |
| int val; |
| |
| /* We should never reach this point if there is a permanent |
| breakpoint at the same address as the one being deleted. |
| If there is a permanent breakpoint somewhere, it should |
| always be the only one inserted. */ |
| if (b->enable_state == bp_permanent) |
| internal_error (__FILE__, __LINE__, |
| "another breakpoint was inserted on top of " |
| "a permanent breakpoint"); |
| |
| if (b->type == bp_hardware_breakpoint) |
| val = target_insert_hw_breakpoint (b->address, b->shadow_contents); |
| else |
| val = target_insert_breakpoint (b->address, b->shadow_contents); |
| |
| /* If there was an error in the insert, print a message, then stop execution. */ |
| if (val != 0) |
| { |
| struct ui_file *tmp_error_stream = mem_fileopen (); |
| make_cleanup_ui_file_delete (tmp_error_stream); |
| |
| |
| if (b->type == bp_hardware_breakpoint) |
| { |
| fprintf_unfiltered (tmp_error_stream, |
| "Cannot insert hardware breakpoint %d.\n" |
| "You may have requested too many hardware breakpoints.\n", |
| b->number); |
| } |
| else |
| { |
| fprintf_unfiltered (tmp_error_stream, "Cannot insert breakpoint %d.\n", b->number); |
| fprintf_filtered (tmp_error_stream, "Error accessing memory address "); |
| print_address_numeric (b->address, 1, tmp_error_stream); |
| fprintf_filtered (tmp_error_stream, ": %s.\n", |
| safe_strerror (val)); |
| } |
| |
| fprintf_unfiltered (tmp_error_stream,"The same program may be running in another process."); |
| target_terminal_ours_for_output (); |
| error_stream(tmp_error_stream); |
| } |
| else |
| b->inserted = 1; |
| } |
| } |
| |
| free_command_lines (&bpt->commands); |
| if (bpt->cond) |
| xfree (bpt->cond); |
| if (bpt->cond_string != NULL) |
| xfree (bpt->cond_string); |
| if (bpt->addr_string != NULL) |
| xfree (bpt->addr_string); |
| if (bpt->exp != NULL) |
| xfree (bpt->exp); |
| if (bpt->exp_string != NULL) |
| xfree (bpt->exp_string); |
| if (bpt->val != NULL) |
| value_free (bpt->val); |
| if (bpt->source_file != NULL) |
| xfree (bpt->source_file); |
| if (bpt->dll_pathname != NULL) |
| xfree (bpt->dll_pathname); |
| if (bpt->triggered_dll_pathname != NULL) |
| xfree (bpt->triggered_dll_pathname); |
| if (bpt->exec_pathname != NULL) |
| xfree (bpt->exec_pathname); |
| |
| /* Be sure no bpstat's are pointing at it after it's been freed. */ |
| /* FIXME, how can we find all bpstat's? |
| We just check stop_bpstat for now. */ |
| for (bs = stop_bpstat; bs; bs = bs->next) |
| if (bs->breakpoint_at == bpt) |
| { |
| bs->breakpoint_at = NULL; |
| bs->old_val = NULL; |
| /* bs->commands will be freed later. */ |
| } |
| /* On the chance that someone will soon try again to delete this same |
| bp, we mark it as deleted before freeing its storage. */ |
| bpt->type = bp_none; |
| |
| xfree (bpt); |
| } |
| |
| static void |
| do_delete_breakpoint_cleanup (void *b) |
| { |
| delete_breakpoint (b); |
| } |
| |
| struct cleanup * |
| make_cleanup_delete_breakpoint (struct breakpoint *b) |
| { |
| return make_cleanup (do_delete_breakpoint_cleanup, b); |
| } |
| |
| struct cleanup * |
| make_exec_cleanup_delete_breakpoint (struct breakpoint *b) |
| { |
| return make_exec_cleanup (do_delete_breakpoint_cleanup, b); |
| } |
| |
| void |
| delete_command (char *arg, int from_tty) |
| { |
| struct breakpoint *b, *temp; |
| |
| dont_repeat (); |
| |
| if (arg == 0) |
| { |
| int breaks_to_delete = 0; |
| |
| /* Delete all breakpoints if no argument. |
| Do not delete internal or call-dummy breakpoints, these |
| have to be deleted with an explicit breakpoint number argument. */ |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->type != bp_call_dummy && |
| b->type != bp_shlib_event && |
| b->type != bp_thread_event && |
| b->type != bp_overlay_event && |
| b->number >= 0) |
| breaks_to_delete = 1; |
| } |
| |
| /* Ask user only if there are some breakpoints to delete. */ |
| if (!from_tty |
| || (breaks_to_delete && query ("Delete all breakpoints? "))) |
| { |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| if (b->type != bp_call_dummy && |
| b->type != bp_shlib_event && |
| b->type != bp_thread_event && |
| b->type != bp_overlay_event && |
| b->number >= 0) |
| delete_breakpoint (b); |
| } |
| } |
| } |
| else |
| map_breakpoint_numbers (arg, delete_breakpoint); |
| } |
| |
| /* Reset a breakpoint given it's struct breakpoint * BINT. |
| The value we return ends up being the return value from catch_errors. |
| Unused in this case. */ |
| |
| static int |
| breakpoint_re_set_one (void *bint) |
| { |
| /* get past catch_errs */ |
| struct breakpoint *b = (struct breakpoint *) bint; |
| struct value *mark; |
| int i; |
| struct symtabs_and_lines sals; |
| char *s; |
| enum enable_state save_enable; |
| |
| switch (b->type) |
| { |
| case bp_none: |
| warning ("attempted to reset apparently deleted breakpoint #%d?", |
| b->number); |
| return 0; |
| case bp_breakpoint: |
| case bp_hardware_breakpoint: |
| case bp_catch_load: |
| case bp_catch_unload: |
| if (b->addr_string == NULL) |
| { |
| /* Anything without a string can't be re-set. */ |
| delete_breakpoint (b); |
| return 0; |
| } |
| /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote: |
| |
| ``And a hack it is, although Apple's Darwin version of GDB |
| contains an almost identical hack to implement a "future |
| break" command. It seems to work in many real world cases, |
| but it is easy to come up with a test case where the patch |
| doesn't help at all.'' |
| |
| ``It seems that the way GDB implements breakpoints - in - |
| shared - libraries was designed for a.out shared library |
| systems (SunOS 4) where shared libraries were loaded at a |
| fixed address in memory. Since ELF shared libraries can (and |
| will) be loaded at any address in memory, things break. |
| Fixing this is not trivial. Therefore, I'm not sure whether |
| we should add this hack to the branch only. I cannot |
| guarantee that things will be fixed on the trunk in the near |
| future.'' |
| |
| In case we have a problem, disable this breakpoint. We'll |
| restore its status if we succeed. Don't disable a |
| shlib_disabled breakpoint though. There's a fair chance we |
| can't re-set it if the shared library it's in hasn't been |
| loaded yet. */ |
| save_enable = b->enable_state; |
| if (b->enable_state != bp_shlib_disabled) |
| b->enable_state = bp_disabled; |
| |
| set_language (b->language); |
| input_radix = b->input_radix; |
| s = b->addr_string; |
| sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, (char ***) NULL); |
| for (i = 0; i < sals.nelts; i++) |
| { |
| resolve_sal_pc (&sals.sals[i]); |
| |
| /* Reparse conditions, they might contain references to the |
| old symtab. */ |
| if (b->cond_string != NULL) |
| { |
| s = b->cond_string; |
| if (b->cond) |
| xfree (b->cond); |
| b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0); |
| } |
| |
| /* We need to re-set the breakpoint if the address changes... */ |
| if (b->address != sals.sals[i].pc |
| /* ...or new and old breakpoints both have source files, and |
| the source file name or the line number changes... */ |
| || (b->source_file != NULL |
| && sals.sals[i].symtab != NULL |
| && (!STREQ (b->source_file, sals.sals[i].symtab->filename) |
| || b->line_number != sals.sals[i].line) |
| ) |
| /* ...or we switch between having a source file and not having |
| one. */ |
| || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL)) |
| ) |
| { |
| if (b->source_file != NULL) |
| xfree (b->source_file); |
| if (sals.sals[i].symtab == NULL) |
| b->source_file = NULL; |
| else |
| b->source_file = |
| savestring (sals.sals[i].symtab->filename, |
| strlen (sals.sals[i].symtab->filename)); |
| b->line_number = sals.sals[i].line; |
| b->address = sals.sals[i].pc; |
| |
| /* Used to check for duplicates here, but that can |
| cause trouble, as it doesn't check for disabled |
| breakpoints. */ |
| |
| mention (b); |
| |
| /* Might be better to do this just once per breakpoint_re_set, |
| rather than once for every breakpoint. */ |
| breakpoints_changed (); |
| } |
| b->section = sals.sals[i].section; |
| b->enable_state = save_enable; /* Restore it, this worked. */ |
| |
| |
| /* Now that this is re-enabled, check_duplicates |
| can be used. */ |
| check_duplicates (b); |
| |
| } |
| xfree (sals.sals); |
| break; |
| |
| case bp_watchpoint: |
| case bp_hardware_watchpoint: |
| case bp_read_watchpoint: |
| case bp_access_watchpoint: |
| innermost_block = NULL; |
| /* The issue arises of what context to evaluate this in. The |
| same one as when it was set, but what does that mean when |
| symbols have been re-read? We could save the filename and |
| functionname, but if the context is more local than that, the |
| best we could do would be something like how many levels deep |
| and which index at that particular level, but that's going to |
| be less stable than filenames or function names. */ |
| |
| /* So for now, just use a global context. */ |
| if (b->exp) |
| xfree (b->exp); |
| b->exp = parse_expression (b->exp_string); |
| b->exp_valid_block = innermost_block; |
| mark = value_mark (); |
| if (b->val) |
| value_free (b->val); |
| b->val = evaluate_expression (b->exp); |
| release_value (b->val); |
| if (VALUE_LAZY (b->val) && b->enable_state == bp_enabled) |
| value_fetch_lazy (b->val); |
| |
| if (b->cond_string != NULL) |
| { |
| s = b->cond_string; |
| if (b->cond) |
| xfree (b->cond); |
| b->cond = parse_exp_1 (&s, (struct block *) 0, 0); |
| } |
| if (b->enable_state == bp_enabled) |
| mention (b); |
| value_free_to_mark (mark); |
| break; |
| case bp_catch_catch: |
| case bp_catch_throw: |
| break; |
| /* We needn't really do anything to reset these, since the mask |
| that requests them is unaffected by e.g., new libraries being |
| loaded. */ |
| case bp_catch_fork: |
| case bp_catch_vfork: |
| case bp_catch_exec: |
| break; |
| |
| default: |
| printf_filtered ("Deleting unknown breakpoint type %d\n", b->type); |
| /* fall through */ |
| /* Delete longjmp and overlay event breakpoints; they will be |
| reset later by breakpoint_re_set. */ |
| case bp_longjmp: |
| case bp_longjmp_resume: |
| case bp_overlay_event: |
| delete_breakpoint (b); |
| break; |
| |
| /* This breakpoint is special, it's set up when the inferior |
| starts and we really don't want to touch it. */ |
| case bp_shlib_event: |
| |
| /* Like bp_shlib_event, this breakpoint type is special. |
| Once it is set up, we do not want to touch it. */ |
| case bp_thread_event: |
| |
| /* Keep temporary breakpoints, which can be encountered when we step |
| over a dlopen call and SOLIB_ADD is resetting the breakpoints. |
| Otherwise these should have been blown away via the cleanup chain |
| or by breakpoint_init_inferior when we rerun the executable. */ |
| case bp_until: |
| case bp_finish: |
| case bp_watchpoint_scope: |
| case bp_call_dummy: |
| case bp_step_resume: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| /* Re-set all breakpoints after symbols have been re-loaded. */ |
| void |
| breakpoint_re_set (void) |
| { |
| struct breakpoint *b, *temp; |
| enum language save_language; |
| int save_input_radix; |
| static char message1[] = "Error in re-setting breakpoint %d:\n"; |
| char message[sizeof (message1) + 30 /* slop */ ]; |
| |
| save_language = current_language->la_language; |
| save_input_radix = input_radix; |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| /* Format possible error msg */ |
| sprintf (message, message1, b->number); |
| catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL); |
| } |
| set_language (save_language); |
| input_radix = save_input_radix; |
| |
| if (GET_LONGJMP_TARGET_P ()) |
| { |
| create_longjmp_breakpoint ("longjmp"); |
| create_longjmp_breakpoint ("_longjmp"); |
| create_longjmp_breakpoint ("siglongjmp"); |
| create_longjmp_breakpoint ("_siglongjmp"); |
| create_longjmp_breakpoint (NULL); |
| } |
| |
| create_overlay_event_breakpoint ("_ovly_debug_event"); |
| } |
| |
| /* Reset the thread number of this breakpoint: |
| |
| - If the breakpoint is for all threads, leave it as-is. |
| - Else, reset it to the current thread for inferior_ptid. */ |
| void |
| breakpoint_re_set_thread (struct breakpoint *b) |
| { |
| if (b->thread != -1) |
| { |
| if (in_thread_list (inferior_ptid)) |
| b->thread = pid_to_thread_id (inferior_ptid); |
| } |
| } |
| |
| /* Set ignore-count of breakpoint number BPTNUM to COUNT. |
| If from_tty is nonzero, it prints a message to that effect, |
| which ends with a period (no newline). */ |
| |
| void |
| set_ignore_count (int bptnum, int count, int from_tty) |
| { |
| register struct breakpoint *b; |
| |
| if (count < 0) |
| count = 0; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->number == bptnum) |
| { |
| b->ignore_count = count; |
| if (from_tty) |
| { |
| if (count == 0) |
| printf_filtered ("Will stop next time breakpoint %d is reached.", |
| bptnum); |
| else if (count == 1) |
| printf_filtered ("Will ignore next crossing of breakpoint %d.", |
| bptnum); |
| else |
| printf_filtered ("Will ignore next %d crossings of breakpoint %d.", |
| count, bptnum); |
| } |
| breakpoints_changed (); |
| breakpoint_modify_event (b->number); |
| return; |
| } |
| |
| error ("No breakpoint number %d.", bptnum); |
| } |
| |
| /* Clear the ignore counts of all breakpoints. */ |
| void |
| breakpoint_clear_ignore_counts (void) |
| { |
| struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| b->ignore_count = 0; |
| } |
| |
| /* Command to set ignore-count of breakpoint N to COUNT. */ |
| |
| static void |
| ignore_command (char *args, int from_tty) |
| { |
| char *p = args; |
| register int num; |
| |
| if (p == 0) |
| error_no_arg ("a breakpoint number"); |
| |
| num = get_number (&p); |
| if (num == 0) |
| error ("bad breakpoint number: '%s'", args); |
| if (*p == 0) |
| error ("Second argument (specified ignore-count) is missing."); |
| |
| set_ignore_count (num, |
| longest_to_int (value_as_long (parse_and_eval (p))), |
| from_tty); |
| if (from_tty) |
| printf_filtered ("\n"); |
| } |
| |
| /* Call FUNCTION on each of the breakpoints |
| whose numbers are given in ARGS. */ |
| |
| static void |
| map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *)) |
| { |
| register char *p = args; |
| char *p1; |
| register int num; |
| register struct breakpoint *b, *tmp; |
| int match; |
| |
| if (p == 0) |
| error_no_arg ("one or more breakpoint numbers"); |
| |
| while (*p) |
| { |
| match = 0; |
| p1 = p; |
| |
| num = get_number_or_range (&p1); |
| if (num == 0) |
| { |
| warning ("bad breakpoint number at or near '%s'", p); |
| } |
| else |
| { |
| ALL_BREAKPOINTS_SAFE (b, tmp) |
| if (b->number == num) |
| { |
| struct breakpoint *related_breakpoint = b->related_breakpoint; |
| match = 1; |
| function (b); |
| if (related_breakpoint) |
| function (related_breakpoint); |
| break; |
| } |
| if (match == 0) |
| printf_unfiltered ("No breakpoint number %d.\n", num); |
| } |
| p = p1; |
| } |
| } |
| |
| /* Set ignore-count of breakpoint number BPTNUM to COUNT. |
| If from_tty is nonzero, it prints a message to that effect, |
| which ends with a period (no newline). */ |
| |
| void |
| disable_breakpoint (struct breakpoint *bpt) |
| { |
| /* Never disable a watchpoint scope breakpoint; we want to |
| hit them when we leave scope so we can delete both the |
| watchpoint and its scope breakpoint at that time. */ |
| if (bpt->type == bp_watchpoint_scope) |
| return; |
| |
| /* You can't disable permanent breakpoints. */ |
| if (bpt->enable_state == bp_permanent) |
| return; |
| |
| bpt->enable_state = bp_disabled; |
| |
| check_duplicates (bpt); |
| |
| if (modify_breakpoint_hook) |
| modify_breakpoint_hook (bpt); |
| breakpoint_modify_event (bpt->number); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| disable_command (char *args, int from_tty) |
| { |
| register struct breakpoint *bpt; |
| if (args == 0) |
| ALL_BREAKPOINTS (bpt) |
| switch (bpt->type) |
| { |
| case bp_none: |
| warning ("attempted to disable apparently deleted breakpoint #%d?", |
| bpt->number); |
| continue; |
| case bp_breakpoint: |
| case bp_catch_load: |
| case bp_catch_unload: |
| case bp_catch_fork: |
| case bp_catch_vfork: |
| case bp_catch_exec: |
| case bp_catch_catch: |
| case bp_catch_throw: |
| case bp_hardware_breakpoint: |
| case bp_watchpoint: |
| case bp_hardware_watchpoint: |
| case bp_read_watchpoint: |
| case bp_access_watchpoint: |
| disable_breakpoint (bpt); |
| default: |
| continue; |
| } |
| else |
| map_breakpoint_numbers (args, disable_breakpoint); |
| } |
| |
| static void |
| do_enable_breakpoint (struct breakpoint *bpt, enum bpdisp disposition) |
| { |
| struct frame_info *save_selected_frame = NULL; |
| int save_selected_frame_level = -1; |
| int target_resources_ok, other_type_used; |
| struct value *mark; |
| |
| if (bpt->type == bp_hardware_breakpoint) |
| { |
| int i; |
| i = hw_breakpoint_used_count (); |
| target_resources_ok = |
| TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint, |
| i + 1, 0); |
| if (target_resources_ok == 0) |
| error ("No hardware breakpoint support in the target."); |
| else if (target_resources_ok < 0) |
| error ("Hardware breakpoints used exceeds limit."); |
| } |
| |
| if (bpt->enable_state != bp_permanent) |
| bpt->enable_state = bp_enabled; |
| bpt->disposition = disposition; |
| check_duplicates (bpt); |
| breakpoints_changed (); |
| |
| if (bpt->type == bp_watchpoint || |
| bpt->type == bp_hardware_watchpoint || |
| bpt->type == bp_read_watchpoint || |
| bpt->type == bp_access_watchpoint) |
| { |
| if (bpt->exp_valid_block != NULL) |
| { |
| struct frame_info *fr = |
| fr = frame_find_by_id (bpt->watchpoint_frame); |
| if (fr == NULL) |
| { |
| printf_filtered ("\ |
| Cannot enable watchpoint %d because the block in which its expression\n\ |
| is valid is not currently in scope.\n", bpt->number); |
| bpt->enable_state = bp_disabled; |
| return; |
| } |
| |
| save_selected_frame = deprecated_selected_frame; |
| save_selected_frame_level = frame_relative_level (deprecated_selected_frame); |
| select_frame (fr); |
| } |
| |
| value_free (bpt->val); |
| mark = value_mark (); |
| bpt->val = evaluate_expression (bpt->exp); |
| release_value (bpt->val); |
| if (VALUE_LAZY (bpt->val)) |
| value_fetch_lazy (bpt->val); |
| |
| if (bpt->type == bp_hardware_watchpoint || |
| bpt->type == bp_read_watchpoint || |
| bpt->type == bp_access_watchpoint) |
| { |
| int i = hw_watchpoint_used_count (bpt->type, &other_type_used); |
| int mem_cnt = can_use_hardware_watchpoint (bpt->val); |
| |
| /* Hack around 'unused var' error for some targets here */ |
| (void) mem_cnt, i; |
| target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT ( |
| bpt->type, i + mem_cnt, other_type_used); |
| /* we can consider of type is bp_hardware_watchpoint, convert to |
| bp_watchpoint in the following condition */ |
| if (target_resources_ok < 0) |
| { |
| printf_filtered ("\ |
| Cannot enable watchpoint %d because target watch resources\n\ |
| have been allocated for other watchpoints.\n", bpt->number); |
| bpt->enable_state = bp_disabled; |
| value_free_to_mark (mark); |
| return; |
| } |
| } |
| |
| if (save_selected_frame_level >= 0) |
| select_frame (save_selected_frame); |
| value_free_to_mark (mark); |
| } |
| if (modify_breakpoint_hook) |
| modify_breakpoint_hook (bpt); |
| breakpoint_modify_event (bpt->number); |
| } |
| |
| void |
| enable_breakpoint (struct breakpoint *bpt) |
| { |
| do_enable_breakpoint (bpt, bpt->disposition); |
| } |
| |
| /* The enable command enables the specified breakpoints (or all defined |
| breakpoints) so they once again become (or continue to be) effective |
| in stopping the inferior. */ |
| |
| /* ARGSUSED */ |
| static void |
| enable_command (char *args, int from_tty) |
| { |
| register struct breakpoint *bpt; |
| if (args == 0) |
| ALL_BREAKPOINTS (bpt) |
| switch (bpt->type) |
| { |
| case bp_none: |
| warning ("attempted to enable apparently deleted breakpoint #%d?", |
| bpt->number); |
| continue; |
| case bp_breakpoint: |
| case bp_catch_load: |
| case bp_catch_unload: |
| case bp_catch_fork: |
| case bp_catch_vfork: |
| case bp_catch_exec: |
| case bp_catch_catch: |
| case bp_catch_throw: |
| case bp_hardware_breakpoint: |
| case bp_watchpoint: |
| case bp_hardware_watchpoint: |
| case bp_read_watchpoint: |
| case bp_access_watchpoint: |
| enable_breakpoint (bpt); |
| default: |
| continue; |
| } |
| else |
| map_breakpoint_numbers (args, enable_breakpoint); |
| } |
| |
| static void |
| enable_once_breakpoint (struct breakpoint *bpt) |
| { |
| do_enable_breakpoint (bpt, disp_disable); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| enable_once_command (char *args, int from_tty) |
| { |
| map_breakpoint_numbers (args, enable_once_breakpoint); |
| } |
| |
| static void |
| enable_delete_breakpoint (struct breakpoint *bpt) |
| { |
| do_enable_breakpoint (bpt, disp_del); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| enable_delete_command (char *args, int from_tty) |
| { |
| map_breakpoint_numbers (args, enable_delete_breakpoint); |
| } |
| |
| /* Use default_breakpoint_'s, or nothing if they aren't valid. */ |
| |
| struct symtabs_and_lines |
| decode_line_spec_1 (char *string, int funfirstline) |
| { |
| struct symtabs_and_lines sals; |
| if (string == 0) |
| error ("Empty line specification."); |
| if (default_breakpoint_valid) |
| sals = decode_line_1 (&string, funfirstline, |
| default_breakpoint_symtab, |
| default_breakpoint_line, |
| (char ***) NULL); |
| else |
| sals = decode_line_1 (&string, funfirstline, |
| (struct symtab *) NULL, 0, (char ***) NULL); |
| if (*string) |
| error ("Junk at end of line specification: %s", string); |
| return sals; |
| } |
| |
| void |
| _initialize_breakpoint (void) |
| { |
| struct cmd_list_element *c; |
| |
| breakpoint_chain = 0; |
| /* Don't bother to call set_breakpoint_count. $bpnum isn't useful |
| before a breakpoint is set. */ |
| breakpoint_count = 0; |
| |
| add_com ("ignore", class_breakpoint, ignore_command, |
| "Set ignore-count of breakpoint number N to COUNT.\n\ |
| Usage is `ignore N COUNT'."); |
| if (xdb_commands) |
| add_com_alias ("bc", "ignore", class_breakpoint, 1); |
| |
| add_com ("commands", class_breakpoint, commands_command, |
| "Set commands to be executed when a breakpoint is hit.\n\ |
| Give breakpoint number as argument after \"commands\".\n\ |
| With no argument, the targeted breakpoint is the last one set.\n\ |
| The commands themselves follow starting on the next line.\n\ |
| Type a line containing \"end\" to indicate the end of them.\n\ |
| Give \"silent\" as the first line to make the breakpoint silent;\n\ |
| then no output is printed when it is hit, except what the commands print."); |
| |
| add_com ("condition", class_breakpoint, condition_command, |
| "Specify breakpoint number N to break only if COND is true.\n\ |
| Usage is `condition N COND', where N is an integer and COND is an\n\ |
| expression to be evaluated whenever breakpoint N is reached."); |
| |
| c = add_com ("tbreak", class_breakpoint, tbreak_command, |
| "Set a temporary breakpoint. Args like \"break\" command.\n\ |
| Like \"break\" except the breakpoint is only temporary,\n\ |
| so it will be deleted when hit. Equivalent to \"break\" followed\n\ |
| by using \"enable delete\" on the breakpoint number."); |
| set_cmd_completer (c, location_completer); |
| |
| c = add_com ("hbreak", class_breakpoint, hbreak_command, |
| "Set a hardware assisted breakpoint. Args like \"break\" command.\n\ |
| Like \"break\" except the breakpoint requires hardware support,\n\ |
| some target hardware may not have this support."); |
| set_cmd_completer (c, location_completer); |
| |
| c = add_com ("thbreak", class_breakpoint, thbreak_command, |
| "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\ |
| Like \"hbreak\" except the breakpoint is only temporary,\n\ |
| so it will be deleted when hit."); |
| set_cmd_completer (c, location_completer); |
| |
| add_prefix_cmd ("enable", class_breakpoint, enable_command, |
| "Enable some breakpoints.\n\ |
| Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| With no subcommand, breakpoints are enabled until you command otherwise.\n\ |
| This is used to cancel the effect of the \"disable\" command.\n\ |
| With a subcommand you can enable temporarily.", |
| &enablelist, "enable ", 1, &cmdlist); |
| if (xdb_commands) |
| add_com ("ab", class_breakpoint, enable_command, |
| "Enable some breakpoints.\n\ |
| Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| With no subcommand, breakpoints are enabled until you command otherwise.\n\ |
| This is used to cancel the effect of the \"disable\" command.\n\ |
| With a subcommand you can enable temporarily."); |
| |
| add_com_alias ("en", "enable", class_breakpoint, 1); |
| |
| add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, |
| "Enable some breakpoints.\n\ |
| Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| This is used to cancel the effect of the \"disable\" command.\n\ |
| May be abbreviated to simply \"enable\".\n", |
| &enablebreaklist, "enable breakpoints ", 1, &enablelist); |
| |
| add_cmd ("once", no_class, enable_once_command, |
| "Enable breakpoints for one hit. Give breakpoint numbers.\n\ |
| If a breakpoint is hit while enabled in this fashion, it becomes disabled.", |
| &enablebreaklist); |
| |
| add_cmd ("delete", no_class, enable_delete_command, |
| "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ |
| If a breakpoint is hit while enabled in this fashion, it is deleted.", |
| &enablebreaklist); |
| |
| add_cmd ("delete", no_class, enable_delete_command, |
| "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ |
| If a breakpoint is hit while enabled in this fashion, it is deleted.", |
| &enablelist); |
| |
| add_cmd ("once", no_class, enable_once_command, |
| "Enable breakpoints for one hit. Give breakpoint numbers.\n\ |
| If a breakpoint is hit while enabled in this fashion, it becomes disabled.", |
| &enablelist); |
| |
| add_prefix_cmd ("disable", class_breakpoint, disable_command, |
| "Disable some breakpoints.\n\ |
| Arguments are breakpoint numbers with spaces in between.\n\ |
| To disable all breakpoints, give no argument.\n\ |
| A disabled breakpoint is not forgotten, but has no effect until reenabled.", |
| &disablelist, "disable ", 1, &cmdlist); |
| add_com_alias ("dis", "disable", class_breakpoint, 1); |
| add_com_alias ("disa", "disable", class_breakpoint, 1); |
| if (xdb_commands) |
| add_com ("sb", class_breakpoint, disable_command, |
| "Disable some breakpoints.\n\ |
| Arguments are breakpoint numbers with spaces in between.\n\ |
| To disable all breakpoints, give no argument.\n\ |
| A disabled breakpoint is not forgotten, but has no effect until reenabled."); |
| |
| add_cmd ("breakpoints", class_alias, disable_command, |
| "Disable some breakpoints.\n\ |
| Arguments are breakpoint numbers with spaces in between.\n\ |
| To disable all breakpoints, give no argument.\n\ |
| A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ |
| This command may be abbreviated \"disable\".", |
| &disablelist); |
| |
| add_prefix_cmd ("delete", class_breakpoint, delete_command, |
| "Delete some breakpoints or auto-display expressions.\n\ |
| Arguments are breakpoint numbers with spaces in between.\n\ |
| To delete all breakpoints, give no argument.\n\ |
| \n\ |
| Also a prefix command for deletion of other GDB objects.\n\ |
| The \"unset\" command is also an alias for \"delete\".", |
| &deletelist, "delete ", 1, &cmdlist); |
| add_com_alias ("d", "delete", class_breakpoint, 1); |
| if (xdb_commands) |
| add_com ("db", class_breakpoint, delete_command, |
| "Delete some breakpoints.\n\ |
| Arguments are breakpoint numbers with spaces in between.\n\ |
| To delete all breakpoints, give no argument.\n"); |
| |
| add_cmd ("breakpoints", class_alias, delete_command, |
| "Delete some breakpoints or auto-display expressions.\n\ |
| Arguments are breakpoint numbers with spaces in between.\n\ |
| To delete all breakpoints, give no argument.\n\ |
| This command may be abbreviated \"delete\".", |
| &deletelist); |
| |
| add_com ("clear", class_breakpoint, clear_command, |
| concat ("Clear breakpoint at specified line or function.\n\ |
| Argument may be line number, function name, or \"*\" and an address.\n\ |
| If line number is specified, all breakpoints in that line are cleared.\n\ |
| If function is specified, breakpoints at beginning of function are cleared.\n\ |
| If an address is specified, breakpoints at that address are cleared.\n\n", |
| "With no argument, clears all breakpoints in the line that the selected frame\n\ |
| is executing in.\n\ |
| \n\ |
| See also the \"delete\" command which clears breakpoints by number.", NULL)); |
| |
| c = add_com ("break", class_breakpoint, break_command, |
| concat ("Set breakpoint at specified line or function.\n\ |
| Argument may be line number, function name, or \"*\" and an address.\n\ |
| If line number is specified, break at start of code for that line.\n\ |
| If function is specified, break at start of code for that function.\n\ |
| If an address is specified, break at that exact address.\n", |
| "With no arg, uses current execution address of selected stack frame.\n\ |
| This is useful for breaking on return to a stack frame.\n\ |
| \n\ |
| Multiple breakpoints at one place are permitted, and useful if conditional.\n\ |
| \n\ |
| Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL)); |
| set_cmd_completer (c, location_completer); |
| |
| add_com_alias ("b", "break", class_run, 1); |
| add_com_alias ("br", "break", class_run, 1); |
| add_com_alias ("bre", "break", class_run, 1); |
| add_com_alias ("brea", "break", class_run, 1); |
| |
| if (xdb_commands) |
| { |
| add_com_alias ("ba", "break", class_breakpoint, 1); |
| add_com_alias ("bu", "ubreak", class_breakpoint, 1); |
| } |
| |
| if (dbx_commands) |
| { |
| add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command, |
| "Break in function/address or break at a line in the current file.", |
| &stoplist, "stop ", 1, &cmdlist); |
| add_cmd ("in", class_breakpoint, stopin_command, |
| "Break in function or address.\n", &stoplist); |
| add_cmd ("at", class_breakpoint, stopat_command, |
| "Break at a line in the current file.\n", &stoplist); |
| add_com ("status", class_info, breakpoints_info, |
| concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ |
| The \"Type\" column indicates one of:\n\ |
| \tbreakpoint - normal breakpoint\n\ |
| \twatchpoint - watchpoint\n\ |
| The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| address and file/line number respectively.\n\n", |
| "Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| are set to the address of the last breakpoint listed.\n\n\ |
| Convenience variable \"$bpnum\" contains the number of the last\n\ |
| breakpoint set.", NULL)); |
| } |
| |
| add_info ("breakpoints", breakpoints_info, |
| concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ |
| The \"Type\" column indicates one of:\n\ |
| \tbreakpoint - normal breakpoint\n\ |
| \twatchpoint - watchpoint\n\ |
| The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| address and file/line number respectively.\n\n", |
| "Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| are set to the address of the last breakpoint listed.\n\n\ |
| Convenience variable \"$bpnum\" contains the number of the last\n\ |
| breakpoint set.", NULL)); |
| |
| if (xdb_commands) |
| add_com ("lb", class_breakpoint, breakpoints_info, |
| concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ |
| The \"Type\" column indicates one of:\n\ |
| \tbreakpoint - normal breakpoint\n\ |
| \twatchpoint - watchpoint\n\ |
| The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| address and file/line number respectively.\n\n", |
| "Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| are set to the address of the last breakpoint listed.\n\n\ |
| Convenience variable \"$bpnum\" contains the number of the last\n\ |
| breakpoint set.", NULL)); |
| |
| add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, |
| concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\ |
| The \"Type\" column indicates one of:\n\ |
| \tbreakpoint - normal breakpoint\n\ |
| \twatchpoint - watchpoint\n\ |
| \tlongjmp - internal breakpoint used to step through longjmp()\n\ |
| \tlongjmp resume - internal breakpoint at the target of longjmp()\n\ |
| \tuntil - internal breakpoint used by the \"until\" command\n\ |
| \tfinish - internal breakpoint used by the \"finish\" command\n", |
| "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| address and file/line number respectively.\n\n", |
| "Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| are set to the address of the last breakpoint listed.\n\n\ |
| Convenience variable \"$bpnum\" contains the number of the last\n\ |
| breakpoint set.", NULL), |
| &maintenanceinfolist); |
| |
| add_com ("catch", class_breakpoint, catch_command, |
| "Set catchpoints to catch events.\n\ |
| Raised signals may be caught:\n\ |
| \tcatch signal - all signals\n\ |
| \tcatch signal <signame> - a particular signal\n\ |
| Raised exceptions may be caught:\n\ |
| \tcatch throw - all exceptions, when thrown\n\ |
| \tcatch throw <exceptname> - a particular exception, when thrown\n\ |
| \tcatch catch - all exceptions, when caught\n\ |
| \tcatch catch <exceptname> - a particular exception, when caught\n\ |
| Thread or process events may be caught:\n\ |
| \tcatch thread_start - any threads, just after creation\n\ |
| \tcatch thread_exit - any threads, just before expiration\n\ |
| \tcatch thread_join - any threads, just after joins\n\ |
| Process events may be caught:\n\ |
| \tcatch start - any processes, just after creation\n\ |
| \tcatch exit - any processes, just before expiration\n\ |
| \tcatch fork - calls to fork()\n\ |
| \tcatch vfork - calls to vfork()\n\ |
| \tcatch exec - calls to exec()\n\ |
| Dynamically-linked library events may be caught:\n\ |
| \tcatch load - loads of any library\n\ |
| \tcatch load <libname> - loads of a particular library\n\ |
| \tcatch unload - unloads of any library\n\ |
| \tcatch unload <libname> - unloads of a particular library\n\ |
| The act of your program's execution stopping may also be caught:\n\ |
| \tcatch stop\n\n\ |
| C++ exceptions may be caught:\n\ |
| \tcatch throw - all exceptions, when thrown\n\ |
| \tcatch catch - all exceptions, when caught\n\ |
| \n\ |
| Do \"help set follow-fork-mode\" for info on debugging your program\n\ |
| after a fork or vfork is caught.\n\n\ |
| Do \"help breakpoints\" for info on other commands dealing with breakpoints."); |
| |
| add_com ("tcatch", class_breakpoint, tcatch_command, |
| "Set temporary catchpoints to catch events.\n\ |
| Args like \"catch\" command.\n\ |
| Like \"catch\" except the catchpoint is only temporary,\n\ |
| so it will be deleted when hit. Equivalent to \"catch\" followed\n\ |
| by using \"enable delete\" on the catchpoint number."); |
| |
| c = add_com ("watch", class_breakpoint, watch_command, |
| "Set a watchpoint for an expression.\n\ |
| A watchpoint stops execution of your program whenever the value of\n\ |
| an expression changes."); |
| set_cmd_completer (c, location_completer); |
| |
| c = add_com ("rwatch", class_breakpoint, rwatch_command, |
| "Set a read watchpoint for an expression.\n\ |
| A watchpoint stops execution of your program whenever the value of\n\ |
| an expression is read."); |
| set_cmd_completer (c, location_completer); |
| |
| c = add_com ("awatch", class_breakpoint, awatch_command, |
| "Set a watchpoint for an expression.\n\ |
| A watchpoint stops execution of your program whenever the value of\n\ |
| an expression is either read or written."); |
| set_cmd_completer (c, location_completer); |
| |
| add_info ("watchpoints", breakpoints_info, |
| "Synonym for ``info breakpoints''."); |
| |
| |
| c = add_set_cmd ("can-use-hw-watchpoints", class_support, var_zinteger, |
| (char *) &can_use_hw_watchpoints, |
| "Set debugger's willingness to use watchpoint hardware.\n\ |
| If zero, gdb will not use hardware for new watchpoints, even if\n\ |
| such is available. (However, any hardware watchpoints that were\n\ |
| created before setting this to nonzero, will continue to use watchpoint\n\ |
| hardware.)", |
| &setlist); |
| add_show_from_set (c, &showlist); |
| |
| can_use_hw_watchpoints = 1; |
| } |