| /* Everything about breakpoints, for GDB. |
| Copyright 1986, 87, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 1999 |
| 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" |
| |
| /* Prototypes for local functions. */ |
| |
| static void |
| catch_command_1 PARAMS ((char *, int, int)); |
| |
| static void |
| enable_delete_command PARAMS ((char *, int)); |
| |
| static void |
| enable_delete_breakpoint PARAMS ((struct breakpoint *)); |
| |
| static void |
| enable_once_command PARAMS ((char *, int)); |
| |
| static void |
| enable_once_breakpoint PARAMS ((struct breakpoint *)); |
| |
| static void |
| disable_command PARAMS ((char *, int)); |
| |
| static void |
| enable_command PARAMS ((char *, int)); |
| |
| static void |
| map_breakpoint_numbers PARAMS ((char *, void (*)(struct breakpoint *))); |
| |
| static void |
| ignore_command PARAMS ((char *, int)); |
| |
| static int breakpoint_re_set_one PARAMS ((PTR)); |
| |
| static void |
| clear_command PARAMS ((char *, int)); |
| |
| static void |
| catch_command PARAMS ((char *, int)); |
| |
| static void |
| handle_gnu_4_16_catch_command PARAMS ((char *, int, int)); |
| |
| static struct symtabs_and_lines |
| get_catch_sals PARAMS ((int)); |
| |
| static void |
| watch_command PARAMS ((char *, int)); |
| |
| static int |
| can_use_hardware_watchpoint PARAMS ((struct value *)); |
| |
| static void break_at_finish_command PARAMS ((char *, int)); |
| static void break_at_finish_at_depth_command PARAMS ((char *, int)); |
| |
| void |
| tbreak_command PARAMS ((char *, int)); |
| |
| static void tbreak_at_finish_command PARAMS ((char *, int)); |
| |
| static void |
| break_command_1 PARAMS ((char *, int, int)); |
| |
| static void |
| mention PARAMS ((struct breakpoint *)); |
| |
| struct breakpoint * |
| set_raw_breakpoint PARAMS ((struct symtab_and_line)); |
| |
| static void |
| check_duplicates PARAMS ((CORE_ADDR, asection *)); |
| |
| static void |
| describe_other_breakpoints PARAMS ((CORE_ADDR, asection *)); |
| |
| static void |
| breakpoints_info PARAMS ((char *, int)); |
| |
| static void |
| breakpoint_1 PARAMS ((int, int)); |
| |
| static bpstat |
| bpstat_alloc PARAMS ((struct breakpoint *, bpstat)); |
| |
| static int breakpoint_cond_eval PARAMS ((PTR)); |
| |
| static void |
| cleanup_executing_breakpoints PARAMS ((PTR)); |
| |
| static void |
| commands_command PARAMS ((char *, int)); |
| |
| static void |
| condition_command PARAMS ((char *, int)); |
| |
| static int |
| get_number PARAMS ((char **)); |
| |
| void |
| set_breakpoint_count PARAMS ((int)); |
| |
| #if 0 |
| static struct breakpoint * |
| create_temp_exception_breakpoint PARAMS ((CORE_ADDR)); |
| #endif |
| |
| typedef enum { |
| mark_inserted, |
| mark_uninserted |
| } insertion_state_t; |
| |
| static int |
| remove_breakpoint PARAMS ((struct breakpoint *, insertion_state_t)); |
| |
| static int print_it_normal PARAMS ((bpstat)); |
| |
| typedef struct { |
| enum exception_event_kind kind; |
| int enable; |
| } args_for_catchpoint_enable; |
| |
| static int watchpoint_check PARAMS ((PTR)); |
| |
| static int cover_target_enable_exception_callback PARAMS ((PTR)); |
| |
| static int print_it_done PARAMS ((bpstat)); |
| |
| static int print_it_noop PARAMS ((bpstat)); |
| |
| static void maintenance_info_breakpoints PARAMS ((char *, int)); |
| |
| #ifdef GET_LONGJMP_TARGET |
| static void create_longjmp_breakpoint PARAMS ((char *)); |
| #endif |
| |
| static int hw_breakpoint_used_count PARAMS ((void)); |
| |
| static int hw_watchpoint_used_count PARAMS ((enum bptype, int *)); |
| |
| static void hbreak_command PARAMS ((char *, int)); |
| |
| static void thbreak_command PARAMS ((char *, int)); |
| |
| static void watch_command_1 PARAMS ((char *, int, int)); |
| |
| static void rwatch_command PARAMS ((char *, int)); |
| |
| static void awatch_command PARAMS ((char *, int)); |
| |
| static void do_enable_breakpoint PARAMS ((struct breakpoint *, enum bpdisp)); |
| |
| static void create_solib_load_unload_event_breakpoint PARAMS ((char *hookname, int tempflag, char *dll_pathname, char *cond_string, enum bptype bp_kind)); |
| |
| static void create_fork_vfork_event_catchpoint PARAMS ((int tempflag, char * cond_string, enum bptype bp_kind)); |
| |
| static void break_at_finish_at_depth_command_1 PARAMS ((char *arg, int flag, int from_tty)); |
| |
| static void break_at_finish_command_1 PARAMS ((char *arg, int flag, int from_tty)); |
| |
| static void stop_command PARAMS ((char *arg, int from_tty)); |
| |
| static void stopin_command PARAMS ((char *arg, int from_tty)); |
| |
| static void stopat_command PARAMS ((char *arg, int from_tty)); |
| |
| static char *ep_find_event_name_end PARAMS ((char *arg)); |
| |
| static char *ep_parse_optional_if_clause PARAMS ((char **arg)); |
| |
| static char *ep_parse_optional_filename PARAMS ((char **arg)); |
| |
| static void catch_exec_command_1 PARAMS ((char *arg, int tempflag, int from_tty)); |
| |
| static void create_exception_catchpoint PARAMS ((int tempflag, char *cond_string, enum exception_event_kind ex_event, struct symtab_and_line *sal)); |
| |
| static void catch_exception_command_1 PARAMS ((enum exception_event_kind ex_event, char *arg, int tempflag, int from_tty)); |
| |
| static void tcatch_command PARAMS ((char *arg, int from_tty)); |
| |
| static void ep_skip_leading_whitespace PARAMS ((char **s)); |
| |
| /* Prototypes for exported functions. */ |
| |
| static void |
| awatch_command PARAMS ((char *, int)); |
| |
| static void |
| do_enable_breakpoint PARAMS ((struct breakpoint *, enum bpdisp)); |
| |
| /* If FALSE, gdb will not use hardware support for watchpoints, even |
| if such is available. */ |
| static int can_use_hw_watchpoints; |
| |
| void delete_command PARAMS ((char *, int)); |
| |
| void _initialize_breakpoint PARAMS ((void)); |
| |
| void set_breakpoint_count PARAMS ((int)); |
| |
| extern int addressprint; /* Print machine addresses? */ |
| |
| #if defined (GET_LONGJMP_TARGET) || defined (SOLIB_ADD) |
| static int internal_breakpoint_number = -1; |
| #endif |
| |
| /* Are we executing breakpoint commands? */ |
| static int executing_breakpoint_commands; |
| |
| /* 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 (num) |
| 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 () |
| { |
| 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 "$" followed by the name |
| of a convenience variable. Making it an expression wouldn't work well |
| for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */ |
| static int |
| get_number (pp) |
| char **pp; |
| { |
| int retval; |
| char *p = *pp; |
| |
| if (p == NULL) |
| /* Empty line means refer to the last breakpoint. */ |
| return breakpoint_count; |
| else if (*p == '$') |
| { |
| /* Make a copy of the name, so we can null-terminate it |
| to pass to lookup_internalvar(). */ |
| char *varname; |
| char *start = ++p; |
| value_ptr 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) |
| error ( |
| "Convenience variables used to specify breakpoints must have integer values." |
| ); |
| retval = (int) value_as_long (val); |
| } |
| else |
| { |
| if (*p == '-') |
| ++p; |
| while (*p >= '0' && *p <= '9') |
| ++p; |
| if (p == *pp) |
| /* There is no number here. (e.g. "cond a == b"). */ |
| error_no_arg ("breakpoint number"); |
| retval = atoi (*pp); |
| } |
| if (!(isspace (*p) || *p == '\0')) |
| error ("breakpoint number expected"); |
| while (isspace (*p)) |
| p++; |
| *pp = p; |
| return retval; |
| } |
| |
| /* condition N EXP -- set break condition of breakpoint N to EXP. */ |
| |
| static void |
| condition_command (arg, from_tty) |
| 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); |
| |
| ALL_BREAKPOINTS (b) |
| if (b->number == bnum) |
| { |
| if (b->cond) |
| { |
| free ((PTR)b->cond); |
| b->cond = 0; |
| } |
| if (b->cond_string != NULL) |
| free ((PTR)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 (); |
| return; |
| } |
| |
| error ("No breakpoint number %d.", bnum); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| commands_command (arg, from_tty) |
| 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 (); |
| 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 (memaddr, myaddr, len) |
| 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 ("attempted to read through apparently deleted breakpoint #%d?\n", 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 () |
| { |
| register struct breakpoint *b, *temp; |
| int val = 0; |
| int disabled_breaks = 0; |
| |
| static char message1[] = "Error inserting catchpoint %d:\n"; |
| static char message[sizeof (message1) + 30]; |
| |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| 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->enable != disabled |
| && b->enable != shlib_disabled |
| && b->enable != call_disabled |
| && ! b->inserted |
| && ! b->duplicate) |
| { |
| if (b->type == bp_hardware_breakpoint) |
| val = target_insert_hw_breakpoint(b->address, b->shadow_contents); |
| else |
| { |
| /* Check to see if breakpoint is in an overlay section; |
| if so, we should set the breakpoint at the LMA address. |
| Only if the section is currently mapped should we ALSO |
| set a break at the VMA address. */ |
| if (overlay_debugging && b->section && |
| section_is_overlay (b->section)) |
| { |
| CORE_ADDR addr; |
| |
| addr = overlay_unmapped_address (b->address, b->section); |
| val = target_insert_breakpoint (addr, b->shadow_contents); |
| /* This would be the time to check val, to see if the |
| breakpoint write to the load address succeeded. |
| However, this might be an ordinary occurrance, eg. if |
| the unmapped overlay is in ROM. */ |
| val = 0; /* in case unmapped address failed */ |
| if (section_is_mapped (b->section)) |
| val = target_insert_breakpoint (b->address, |
| b->shadow_contents); |
| } |
| else /* ordinary (non-overlay) address */ |
| val = target_insert_breakpoint(b->address, b->shadow_contents); |
| } |
| 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 = shlib_disabled; |
| if (!disabled_breaks) |
| { |
| target_terminal_ours_for_output (); |
| fprintf_unfiltered (gdb_stderr, |
| "Cannot insert breakpoint %d:\n", b->number); |
| printf_filtered ("Temporarily disabling shared library breakpoints:\n"); |
| } |
| disabled_breaks = 1; |
| printf_filtered ("%d ", b->number); |
| } |
| else |
| #endif |
| { |
| target_terminal_ours_for_output (); |
| fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number); |
| #ifdef ONE_PROCESS_WRITETEXT |
| fprintf_unfiltered (gdb_stderr, |
| "The same program may be running in another process.\n"); |
| #endif |
| memory_error (val, b->address); /* which bombs us out */ |
| } |
| } |
| else |
| b->inserted = 1; |
| } |
| else if (ep_is_exception_catchpoint (b) |
| && b->enable != disabled |
| && b->enable != shlib_disabled |
| && b->enable != call_disabled |
| && ! 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. */ |
| sprintf (message, message1, b->number); /* Format possible error message */ |
| |
| val = target_insert_breakpoint(b->address, b->shadow_contents); |
| if (val) |
| { |
| /* Couldn't set breakpoint for some reason */ |
| target_terminal_ours_for_output (); |
| fprintf_unfiltered (gdb_stderr, |
| "Cannot insert catchpoint %d; disabling it\n", b->number); |
| b->enable = 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 = 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 */ |
| target_terminal_ours_for_output (); |
| fprintf_unfiltered (gdb_stderr, "Cannot insert catchpoint %d; disabling it\n", b->number); |
| b->enable = disabled; |
| } |
| } |
| } |
| |
| else if ((b->type == bp_hardware_watchpoint || |
| b->type == bp_read_watchpoint || |
| b->type == bp_access_watchpoint) |
| && b->enable == enabled |
| && ! b->inserted |
| && ! b->duplicate) |
| { |
| struct frame_info *saved_frame; |
| int saved_level, within_current_scope; |
| value_ptr mark = value_mark (); |
| value_ptr v; |
| |
| /* Save the current frame and level so we can restore it after |
| evaluating the watchpoint expression on its own frame. */ |
| saved_frame = selected_frame; |
| saved_level = selected_frame_level; |
| |
| /* Determine if the watchpoint is within scope. */ |
| if (b->exp_valid_block == NULL) |
| within_current_scope = 1; |
| else |
| { |
| struct frame_info *fi; |
| |
| /* There might be no current frame at this moment if we are |
| resuming from a step over a breakpoint. |
| Set up current frame before trying to find the watchpoint |
| frame. */ |
| get_current_frame (); |
| fi = find_frame_addr_in_frame_chain (b->watchpoint_frame); |
| within_current_scope = (fi != NULL); |
| if (within_current_scope) |
| select_frame (fi, -1); |
| } |
| |
| if (within_current_scope) |
| { |
| /* Evaluate the expression and cut the chain of values |
| produced off from the value chain. */ |
| v = evaluate_expression (b->exp); |
| 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, then we must watch it. */ |
| if (v->lval == lval_memory) |
| { |
| int addr, len, type; |
| |
| addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); |
| len = TYPE_LENGTH (VALUE_TYPE (v)); |
| type = 0; |
| if (b->type == bp_read_watchpoint) |
| type = 1; |
| else if (b->type == bp_access_watchpoint) |
| type = 2; |
| |
| val = target_insert_watchpoint (addr, len, type); |
| if (val == -1) |
| { |
| b->inserted = 0; |
| break; |
| } |
| val = 0; |
| } |
| } |
| /* Failure to insert a watchpoint on any memory value in the |
| value chain brings us here. */ |
| if (!b->inserted) |
| warning ("Hardware watchpoint %d: Could not insert watchpoint\n", |
| b->number); |
| } |
| else |
| { |
| printf_filtered ("\ |
| Hardware watchpoint %d deleted because the program has left the block in\n\ |
| which its expression is valid.\n", b->number); |
| if (b->related_breakpoint) |
| b->related_breakpoint->disposition = del_at_next_stop; |
| b->disposition = del_at_next_stop; |
| } |
| |
| /* Restore the frame and level. */ |
| if ((saved_frame != selected_frame) || |
| (saved_level != selected_frame_level)) |
| select_and_print_frame (saved_frame, saved_level); |
| } |
| else if ((b->type == bp_catch_fork |
| || b->type == bp_catch_vfork |
| || b->type == bp_catch_exec) |
| && b->enable == enabled |
| && ! b->inserted |
| && ! b->duplicate) |
| { |
| val = -1; |
| switch (b->type) |
| { |
| case bp_catch_fork : |
| val = target_insert_fork_catchpoint (inferior_pid); |
| break; |
| case bp_catch_vfork : |
| val = target_insert_vfork_catchpoint (inferior_pid); |
| break; |
| case bp_catch_exec : |
| val = target_insert_exec_catchpoint (inferior_pid); |
| break; |
| } |
| if (val < 0) |
| { |
| target_terminal_ours_for_output (); |
| fprintf_unfiltered (gdb_stderr, "Cannot insert catchpoint %d:\n", b->number); |
| } |
| else |
| b->inserted = 1; |
| } |
| } |
| if (disabled_breaks) |
| printf_filtered ("\n"); |
| |
| return val; |
| } |
| |
| |
| int |
| remove_breakpoints () |
| { |
| 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 |
| reattach_breakpoints (pid) |
| int pid; |
| { |
| register struct breakpoint *b; |
| int val; |
| int saved_inferior_pid = inferior_pid; |
| |
| inferior_pid = pid; /* Because remove_breakpoint will use this global. */ |
| 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) |
| { |
| inferior_pid = saved_inferior_pid; |
| return val; |
| } |
| } |
| } |
| inferior_pid = saved_inferior_pid; |
| return 0; |
| } |
| |
| void |
| update_breakpoints_after_exec () |
| { |
| 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; |
| } |
| |
| /* 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. */ |
| 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. */ |
| b->address = (CORE_ADDR) NULL; |
| } |
| } |
| |
| int |
| detach_breakpoints (pid) |
| int pid; |
| { |
| register struct breakpoint *b; |
| int val; |
| int saved_inferior_pid = inferior_pid; |
| |
| if (pid == inferior_pid) |
| error ("Cannot detach breakpoints of inferior_pid"); |
| |
| inferior_pid = pid; /* Because remove_breakpoint will use this global. */ |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->inserted) |
| { |
| val = remove_breakpoint (b, mark_inserted); |
| if (val != 0) |
| { |
| inferior_pid = saved_inferior_pid; |
| return val; |
| } |
| } |
| } |
| inferior_pid = saved_inferior_pid; |
| return 0; |
| } |
| |
| static int |
| remove_breakpoint (b, is) |
| struct breakpoint *b; |
| insertion_state_t is; |
| { |
| int val; |
| |
| if (b->type == bp_none) |
| warning ("attempted to remove apparently deleted breakpoint #%d?\n", 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) |
| |
| { |
| if (b->type == bp_hardware_breakpoint) |
| val = target_remove_hw_breakpoint(b->address, b->shadow_contents); |
| else |
| { |
| /* Check to see if breakpoint is in an overlay section; |
| if so, we should remove the breakpoint at the LMA address. |
| If that is not equal to the raw address, then we should |
| presumable remove the breakpoint there as well. */ |
| if (overlay_debugging && b->section && |
| section_is_overlay (b->section)) |
| { |
| CORE_ADDR addr; |
| |
| addr = overlay_unmapped_address (b->address, b->section); |
| val = target_remove_breakpoint (addr, b->shadow_contents); |
| /* This would be the time to check val, to see if the |
| shadow breakpoint write to the load address succeeded. |
| However, this might be an ordinary occurrance, eg. if |
| the unmapped overlay is in ROM. */ |
| val = 0; /* in case unmapped address failed */ |
| if (section_is_mapped (b->section)) |
| val = target_remove_breakpoint (b->address, |
| b->shadow_contents); |
| } |
| else /* ordinary (non-overlay) address */ |
| val = target_remove_breakpoint(b->address, b->shadow_contents); |
| } |
| 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 == enabled |
| && ! b->duplicate) |
| { |
| value_ptr v, 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 (v->lval == lval_memory) |
| { |
| int addr, len, type; |
| |
| addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); |
| len = TYPE_LENGTH (VALUE_TYPE (v)); |
| type = 0; |
| if (b->type == bp_read_watchpoint) |
| type = 1; |
| else if (b->type == bp_access_watchpoint) |
| type = 2; |
| |
| 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 ("Hardware watchpoint %d: Could not remove watchpoint\n", |
| 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 == enabled |
| && ! b->duplicate) |
| { |
| val = -1; |
| switch (b->type) |
| { |
| case bp_catch_fork: |
| val = target_remove_fork_catchpoint (inferior_pid); |
| break; |
| case bp_catch_vfork : |
| val = target_remove_vfork_catchpoint (inferior_pid); |
| break; |
| case bp_catch_exec : |
| val = target_remove_exec_catchpoint (inferior_pid); |
| break; |
| } |
| if (val) |
| return val; |
| b->inserted = (is == mark_inserted); |
| } |
| else if ((b->type == bp_catch_catch || |
| b->type == bp_catch_throw) |
| && b->enable == 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 == 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 () |
| { |
| 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 (context) |
| 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); |
| 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, you must reinsert them explicitly"); |
| warning_needed = 0; |
| } |
| } |
| |
| /* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC. |
| When continuing from a location with a breakpoint, |
| we actually single step once before calling insert_breakpoints. */ |
| |
| int |
| breakpoint_here_p (pc) |
| CORE_ADDR pc; |
| { |
| register struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->enable == enabled |
| && b->enable != shlib_disabled |
| && b->enable != call_disabled |
| && 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 |
| return 1; |
| } |
| |
| return 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 (pc) |
| 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 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 |
| frame_in_dummy (frame) |
| struct frame_info *frame; |
| { |
| struct breakpoint *b; |
| |
| if (! CALL_DUMMY_P) |
| return 0; |
| |
| if (USE_GENERIC_DUMMY_FRAMES) |
| return generic_pc_in_call_dummy (frame->pc, frame->frame, frame->frame); |
| |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->type == bp_call_dummy |
| && b->frame == frame->frame |
| /* We need to check the PC as well as the frame on the sparc, |
| for signals.exp in the testsuite. */ |
| && (frame->pc |
| >= (b->address |
| - SIZEOF_CALL_DUMMY_WORDS / sizeof (LONGEST) * REGISTER_SIZE)) |
| && frame->pc <= b->address) |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* breakpoint_match_thread (PC, PID) returns true if the breakpoint at PC |
| is valid for process/thread PID. */ |
| |
| int |
| breakpoint_thread_match (pc, pid) |
| CORE_ADDR pc; |
| int pid; |
| { |
| struct breakpoint *b; |
| int thread; |
| |
| thread = pid_to_thread_id (pid); |
| |
| ALL_BREAKPOINTS (b) |
| if (b->enable != disabled |
| && b->enable != shlib_disabled |
| && b->enable != 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 (ep) |
| 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 (ep) |
| struct breakpoint * ep; |
| { |
| return |
| (ep->type == bp_catch_load) |
| || (ep->type == bp_catch_unload) |
| ; |
| } |
| |
| int |
| ep_is_exception_catchpoint (ep) |
| 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 (bsp) |
| 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 ((PTR)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 (bs) |
| 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(bsp, 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 (bsp) |
| bpstat bsp; |
| { |
| if (bsp == NULL) |
| error ("Internal error (bpstat_find_step_resume_breakpoint)"); |
| |
| for (; bsp != NULL; bsp = bsp->next) |
| { |
| if ((bsp->breakpoint_at != NULL) && |
| (bsp->breakpoint_at->type == bp_step_resume)) |
| 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 (bsp) |
| 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 (bs) |
| bpstat bs; |
| { |
| for (; bs != NULL; bs = bs->next) |
| { |
| bs->commands = NULL; |
| 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 (ignore) |
| PTR 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 (bsp) |
| 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 |
| bs->commands = NULL; |
| } |
| |
| executing_breakpoint_commands = 0; |
| discard_cleanups (old_chain); |
| } |
| |
| /* This is the normal print_it 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 functions. |
| |
| Current scheme: When we stop, bpstat_print() is called. |
| It loops through the bpstat list of things causing this stop, |
| calling the print_it function for each one. The default |
| print_it function, used for breakpoints, is print_it_normal(). |
| (Also see print_it_noop() and print_it_done()). |
| |
| Return values from this routine (used by bpstat_print() to |
| decide what to do): |
| 1: Means we printed something, and we do *not* desire that |
| something to be followed by a location. |
| 0: Means we printed something, and we *do* desire that |
| something to be followed by a location. |
| -1: Means we printed nothing. */ |
| |
| static int |
| print_it_normal (bs) |
| bpstat bs; |
| { |
| /* bs->breakpoint_at can be NULL if it was a momentary breakpoint |
| which has since been deleted. */ |
| if (bs->breakpoint_at == NULL |
| || (bs->breakpoint_at->type != bp_breakpoint |
| && bs->breakpoint_at->type != bp_catch_load |
| && bs->breakpoint_at->type != bp_catch_unload |
| && bs->breakpoint_at->type != bp_catch_fork |
| && bs->breakpoint_at->type != bp_catch_vfork |
| && bs->breakpoint_at->type != bp_catch_exec |
| && bs->breakpoint_at->type != bp_catch_catch |
| && bs->breakpoint_at->type != bp_catch_throw |
| && bs->breakpoint_at->type != bp_hardware_breakpoint |
| && bs->breakpoint_at->type != bp_watchpoint |
| && bs->breakpoint_at->type != bp_read_watchpoint |
| && bs->breakpoint_at->type != bp_access_watchpoint |
| && bs->breakpoint_at->type != bp_hardware_watchpoint)) |
| return -1; |
| |
| if (ep_is_shlib_catchpoint (bs->breakpoint_at)) |
| { |
| annotate_catchpoint (bs->breakpoint_at->number); |
| printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); |
| if (bs->breakpoint_at->type == bp_catch_load) |
| printf_filtered ("loaded"); |
| else if (bs->breakpoint_at->type == bp_catch_unload) |
| printf_filtered ("unloaded"); |
| printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname); |
| return 0; |
| } |
| else if (bs->breakpoint_at->type == bp_catch_fork || |
| bs->breakpoint_at->type == bp_catch_vfork) |
| { |
| annotate_catchpoint (bs->breakpoint_at->number); |
| printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); |
| if (bs->breakpoint_at->type == bp_catch_fork) |
| printf_filtered ("forked"); |
| else if (bs->breakpoint_at->type == bp_catch_vfork) |
| printf_filtered ("vforked"); |
| printf_filtered (" process %d), ", bs->breakpoint_at->forked_inferior_pid); |
| return 0; |
| } |
| else if (bs->breakpoint_at->type == 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 0; |
| } |
| else if (bs->breakpoint_at->type == 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"); |
| return 1; /* don't bother to print location frame info */ |
| } |
| else |
| { |
| return -1; /* really throw, some other bpstat will handle it */ |
| } |
| } |
| else if (bs->breakpoint_at->type == 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"); |
| return 1; /* don't bother to print location frame info */ |
| } |
| else |
| { |
| return -1; /* really catch, some other bpstat willhandle it */ |
| } |
| } |
| |
| else if (bs->breakpoint_at->type == bp_breakpoint || |
| bs->breakpoint_at->type == bp_hardware_breakpoint) |
| { |
| /* I think the user probably only wants to see one breakpoint |
| number, not all of them. */ |
| annotate_breakpoint (bs->breakpoint_at->number); |
| printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number); |
| return 0; |
| } |
| else if ((bs->old_val != NULL) && |
| (bs->breakpoint_at->type == bp_watchpoint || |
| bs->breakpoint_at->type == bp_access_watchpoint || |
| bs->breakpoint_at->type == bp_hardware_watchpoint)) |
| { |
| annotate_watchpoint (bs->breakpoint_at->number); |
| mention (bs->breakpoint_at); |
| printf_filtered ("\nOld value = "); |
| value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default); |
| printf_filtered ("\nNew value = "); |
| value_print (bs->breakpoint_at->val, gdb_stdout, 0, |
| Val_pretty_default); |
| printf_filtered ("\n"); |
| value_free (bs->old_val); |
| bs->old_val = NULL; |
| /* More than one watchpoint may have been triggered. */ |
| return -1; |
| } |
| else if (bs->breakpoint_at->type == bp_access_watchpoint || |
| bs->breakpoint_at->type == bp_read_watchpoint) |
| { |
| mention (bs->breakpoint_at); |
| printf_filtered ("\nValue = "); |
| value_print (bs->breakpoint_at->val, gdb_stdout, 0, |
| Val_pretty_default); |
| printf_filtered ("\n"); |
| return -1; |
| } |
| /* We can't deal with it. Maybe another member of the bpstat chain can. */ |
| return -1; |
| } |
| |
| /* 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 "print_it" routine(s) associated |
| with these eventpoints. This will print (for example) |
| the "Breakpoint n," part of the output. |
| The return value of this routine is one of: |
| |
| -1: Means we printed nothing |
| 0: Means we printed something, and expect subsequent |
| code to print the location. An example is |
| "Breakpoint 1, " which should be followed by |
| the location. |
| 1 : 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. */ |
| |
| int |
| bpstat_print (bs) |
| bpstat bs; |
| { |
| int val; |
| |
| if (bs == NULL) |
| return -1; |
| |
| val = (*bs->print_it) (bs); |
| if (val >= 0) |
| return 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). */ |
| if (bs->next) |
| return bpstat_print (bs->next); |
| |
| /* We reached the end of the chain without printing anything. */ |
| return -1; |
| } |
| |
| /* 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 (exp) |
| PTR exp; |
| { |
| value_ptr 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 (b, cbs) |
| register 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 (p) |
| PTR 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 = find_frame_addr_in_frame_chain (b->watchpoint_frame); |
| within_current_scope = (fr != NULL); |
| 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, -1); |
| } |
| |
| 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. */ |
| |
| value_ptr mark = value_mark (); |
| value_ptr 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). */ |
| printf_filtered ("\ |
| Watchpoint %d deleted because the program has left the block in\n\ |
| which its expression is valid.\n", bs->breakpoint_at->number); |
| if (b->related_breakpoint) |
| b->related_breakpoint->disposition = del_at_next_stop; |
| b->disposition = del_at_next_stop; |
| |
| return WP_DELETED; |
| } |
| } |
| |
| /* This is used when everything which needs to be printed has |
| already been printed. But we still want to print the frame. */ |
| |
| /* Background: When we stop, bpstat_print() is called. |
| It loops through the bpstat list of things causing this stop, |
| calling the print_it function for each one. The default |
| print_it function, used for breakpoints, is print_it_normal(). |
| Also see print_it_noop() and print_it_done() are the other |
| two possibilities. See comments in bpstat_print() and |
| in header of print_it_normal() for more detail. */ |
| |
| static int |
| print_it_done (bs) |
| bpstat bs; |
| { |
| return 0; |
| } |
| |
| /* This is used when nothing should be printed for this bpstat entry. */ |
| /* Background: When we stop, bpstat_print() is called. |
| It loops through the bpstat list of things causing this stop, |
| calling the print_it function for each one. The default |
| print_it function, used for breakpoints, is print_it_normal(). |
| Also see print_it_noop() and print_it_done() are the other |
| two possibilities. See comments in bpstat_print() and |
| in header of print_it_normal() for more detail. */ |
| |
| static int |
| print_it_noop (bs) |
| bpstat bs; |
| { |
| return -1; |
| } |
| |
| /* 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_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 (pc, not_a_breakpoint) |
| CORE_ADDR *pc; |
| int not_a_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. */ |
| bp_addr = *pc - DECR_PC_AFTER_BREAK; |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| if (b->enable == disabled |
| || b->enable == shlib_disabled |
| || b->enable == 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 or */ |
| (overlay_debugging && /* overlay doesn't match */ |
| section_is_overlay (b->section) && |
| !section_is_mapped (b->section))) |
| continue; |
| |
| if (b->type == bp_hardware_breakpoint |
| && b->address != (*pc - DECR_PC_AFTER_HW_BREAK)) |
| continue; |
| |
| if (b->type != bp_watchpoint |
| && b->type != bp_hardware_watchpoint |
| && b->type != bp_read_watchpoint |
| && b->type != bp_access_watchpoint |
| && not_a_breakpoint) |
| 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(inferior_pid) |
| || ((b->dll_pathname != NULL) |
| && (strcmp (b->dll_pathname, SOLIB_LOADED_LIBRARY_PATHNAME(inferior_pid)) != 0))) |
| #endif |
| ) |
| continue; |
| |
| if ((b->type == bp_catch_unload) |
| #if defined(SOLIB_HAVE_UNLOAD_EVENT) |
| && (!SOLIB_HAVE_UNLOAD_EVENT(inferior_pid) |
| || ((b->dll_pathname != NULL) |
| && (strcmp (b->dll_pathname, SOLIB_UNLOADED_LIBRARY_PATHNAME(inferior_pid)) != 0))) |
| #endif |
| ) |
| continue; |
| |
| if ((b->type == bp_catch_fork) |
| && ! target_has_forked (inferior_pid, &b->forked_inferior_pid)) |
| continue; |
| |
| if ((b->type == bp_catch_vfork) |
| && ! target_has_vforked (inferior_pid, &b->forked_inferior_pid)) |
| continue; |
| |
| if ((b->type == bp_catch_exec) |
| && ! target_has_execd (inferior_pid, &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. */ |
| 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; |
| /* Don't consider this a hit. */ |
| --(b->hit_count); |
| 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 = del_at_next_stop; |
| b->disposition = 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; |
| value_ptr v; |
| int found = 0; |
| |
| addr = target_stopped_data_address(); |
| if (addr == 0) continue; |
| for (v = b->val_chain; v; v = v->next) |
| { |
| if (v->lval == lval_memory) |
| { |
| CORE_ADDR vaddr; |
| |
| vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); |
| if (addr == vaddr) |
| 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: |
| 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 = del_at_next_stop; |
| b->disposition = del_at_next_stop; |
| /* We've already printed what needs to be printed. */ |
| bs->print_it = print_it_done; |
| break; |
| } |
| } |
| else |
| { |
| /* By definition, an encountered breakpoint is a triggered |
| breakpoint. */ |
| ++(b->hit_count); |
| |
| real_breakpoint = 1; |
| } |
| |
| if (b->frame && b->frame != (get_current_frame ())->frame && |
| (b->type == bp_step_resume && |
| (INNER_THAN (get_current_frame ()->frame, b->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 (), 0); |
| 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--; |
| bs->stop = 0; |
| } |
| else |
| { |
| /* We will stop here */ |
| if (b->disposition == disable) |
| b->enable = disabled; |
| bs->commands = 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 (bs) |
| 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. */ |
| |
| /* step_resume entries: a step resume breakpoint overrides another |
| breakpoint of signal handling (see comment in wait_for_inferior |
| at first 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, err, 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_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 () |
| { |
| struct breakpoint *b; |
| ALL_BREAKPOINTS (b) |
| if (b->enable == enabled && b->type == bp_watchpoint) |
| return 1; |
| return 0; |
| } |
| |
| /* Nonzero if there are enabled hardware watchpoints. */ |
| int |
| bpstat_have_active_hw_watchpoints () |
| { |
| struct breakpoint *b; |
| ALL_BREAKPOINTS (b) |
| if ((b->enable == 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 (ep_list, cp_list) |
| 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) |
| free (ep->triggered_dll_pathname); |
| if (ep->type == bp_catch_load) |
| dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME (inferior_pid); |
| else |
| dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME (inferior_pid); |
| #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 information on breakpoint number BNUM, or -1 if all. |
| If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS |
| is nonzero, process only watchpoints. */ |
| |
| typedef struct { |
| enum bptype type; |
| char * description; |
| } ep_type_description_t; |
| |
| static void |
| breakpoint_1 (bnum, allflag) |
| int bnum; |
| int allflag; |
| { |
| register struct breakpoint *b; |
| register struct command_line *l; |
| register struct symbol *sym; |
| CORE_ADDR last_addr = (CORE_ADDR)-1; |
| int found_a_breakpoint = 0; |
| static ep_type_description_t 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_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[] = "nyn"; |
| char wrap_indent[80]; |
| |
| ALL_BREAKPOINTS (b) |
| if (bnum == -1 |
| || bnum == b->number) |
| { |
| /* We only print out user settable breakpoints unless the allflag is set. */ |
| if (!allflag |
| && 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) |
| continue; |
| |
| if (!found_a_breakpoint++) |
| { |
| annotate_breakpoints_headers (); |
| |
| annotate_field (0); |
| printf_filtered ("Num "); |
| annotate_field (1); |
| printf_filtered ("Type "); |
| annotate_field (2); |
| printf_filtered ("Disp "); |
| annotate_field (3); |
| printf_filtered ("Enb "); |
| if (addressprint) |
| { |
| annotate_field (4); |
| printf_filtered ("Address "); |
| } |
| annotate_field (5); |
| printf_filtered ("What\n"); |
| |
| annotate_breakpoints_table (); |
| } |
| |
| annotate_record (); |
| annotate_field (0); |
| printf_filtered ("%-3d ", b->number); |
| annotate_field (1); |
| if ((int)b->type > (sizeof(bptypes)/sizeof(bptypes[0]))) |
| error ("bptypes table does not describe type #%d.", (int)b->type); |
| if ((int)b->type != bptypes[(int)b->type].type) |
| error ("bptypes table does not describe type #%d?", (int)b->type); |
| printf_filtered ("%-14s ", bptypes[(int)b->type].description); |
| annotate_field (2); |
| printf_filtered ("%-4s ", bpdisps[(int)b->disposition]); |
| annotate_field (3); |
| printf_filtered ("%-3c ", bpenables[(int)b->enable]); |
| |
| strcpy (wrap_indent, " "); |
| if (addressprint) |
| strcat (wrap_indent, " "); |
| switch (b->type) |
| { |
| 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). */ |
| annotate_field (5); |
| print_expression (b->exp, gdb_stdout); |
| 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). */ |
| annotate_field (5); |
| if (b->dll_pathname == NULL) |
| printf_filtered ("<any library> "); |
| else |
| printf_filtered ("library \"%s\" ", b->dll_pathname); |
| 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). */ |
| annotate_field (5); |
| if (b->forked_inferior_pid != 0) |
| printf_filtered ("process %d ", b->forked_inferior_pid); |
| break; |
| |
| 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). */ |
| annotate_field (5); |
| if (b->exec_pathname != NULL) |
| printf_filtered ("program \"%s\" ", b->exec_pathname); |
| 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). */ |
| annotate_field (5); |
| printf_filtered ("exception catch "); |
| 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). */ |
| annotate_field (5); |
| printf_filtered ("exception throw "); |
| 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: |
| if (addressprint) |
| { |
| annotate_field (4); |
| /* FIXME-32x64: need a print_address_numeric with |
| field width */ |
| printf_filtered |
| ("%s ", |
| local_hex_string_custom |
| ((unsigned long) b->address, "08l")); |
| } |
| |
| annotate_field (5); |
| |
| last_addr = b->address; |
| if (b->source_file) |
| { |
| sym = find_pc_sect_function (b->address, b->section); |
| if (sym) |
| { |
| fputs_filtered ("in ", gdb_stdout); |
| fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout); |
| wrap_here (wrap_indent); |
| fputs_filtered (" at ", gdb_stdout); |
| } |
| fputs_filtered (b->source_file, gdb_stdout); |
| printf_filtered (":%d", b->line_number); |
| } |
| else |
| print_address_symbolic (b->address, gdb_stdout, demangle, " "); |
| break; |
| } |
| |
| if (b->thread != -1) |
| printf_filtered (" thread %d", b->thread ); |
| |
| printf_filtered ("\n"); |
| |
| if (b->frame) |
| { |
| annotate_field (6); |
| |
| printf_filtered ("\tstop only in stack frame at "); |
| print_address_numeric (b->frame, 1, gdb_stdout); |
| printf_filtered ("\n"); |
| } |
| |
| if (b->cond) |
| { |
| annotate_field (7); |
| |
| printf_filtered ("\tstop only if "); |
| print_expression (b->cond, gdb_stdout); |
| printf_filtered ("\n"); |
| } |
| |
| if (b->thread != -1) |
| { |
| /* FIXME should make an annotation for this */ |
| printf_filtered ("\tstop only in thread %d\n", b->thread); |
| } |
| |
| if (show_breakpoint_hit_counts && b->hit_count) |
| { |
| /* FIXME should make an annotation for this */ |
| if (ep_is_catchpoint (b)) |
| printf_filtered ("\tcatchpoint"); |
| else |
| printf_filtered ("\tbreakpoint"); |
| printf_filtered (" already hit %d time%s\n", |
| b->hit_count, (b->hit_count == 1 ? "" : "s")); |
| } |
| |
| if (b->ignore_count) |
| { |
| annotate_field (8); |
| |
| printf_filtered ("\tignore next %d hits\n", b->ignore_count); |
| } |
| |
| if ((l = b->commands)) |
| { |
| annotate_field (9); |
| |
| while (l) |
| { |
| print_command_line (l, 4, gdb_stdout); |
| l = l->next; |
| } |
| } |
| } |
| |
| if (!found_a_breakpoint) |
| { |
| if (bnum == -1) |
| printf_filtered ("No breakpoints or watchpoints.\n"); |
| else |
| printf_filtered ("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); |
| |
| annotate_breakpoints_table_end (); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| breakpoints_info (bnum_exp, from_tty) |
| char *bnum_exp; |
| int from_tty; |
| { |
| int bnum = -1; |
| |
| if (bnum_exp) |
| bnum = parse_and_eval_address (bnum_exp); |
| |
| breakpoint_1 (bnum, 0); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| maintenance_info_breakpoints (bnum_exp, from_tty) |
| char *bnum_exp; |
| int from_tty; |
| { |
| int bnum = -1; |
| |
| if (bnum_exp) |
| bnum = parse_and_eval_address (bnum_exp); |
| |
| breakpoint_1 (bnum, 1); |
| } |
| |
| /* Print a message describing any breakpoints set at PC. */ |
| |
| static void |
| describe_other_breakpoints (pc, section) |
| CORE_ADDR pc; |
| asection *section; |
| { |
| register int others = 0; |
| register struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->address == pc) |
| if (overlay_debugging == 0 || |
| b->section == section) |
| others++; |
| if (others > 0) |
| { |
| printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : ""); |
| ALL_BREAKPOINTS (b) |
| if (b->address == pc) |
| if (overlay_debugging == 0 || |
| b->section == section) |
| { |
| others--; |
| printf_filtered |
| ("%d%s%s ", |
| b->number, |
| ((b->enable == disabled || b->enable == shlib_disabled || b->enable == call_disabled) |
| ? " (disabled)" : ""), |
| (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 (valid, addr, symtab, line) |
| 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; |
| } |
| |
| /* Rescan breakpoints at address ADDRESS, |
| marking the first one as "first" and any others as "duplicates". |
| This is so that the bpt instruction is only inserted once. */ |
| |
| static void |
| check_duplicates (address, section) |
| CORE_ADDR address; |
| asection *section; |
| { |
| register struct breakpoint *b; |
| register int count = 0; |
| |
| if (address == 0) /* Watchpoints are uninteresting */ |
| return; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->enable != disabled |
| && b->enable != shlib_disabled |
| && b->enable != call_disabled |
| && b->address == address |
| && (overlay_debugging == 0 || b->section == section)) |
| { |
| count++; |
| b->duplicate = count > 1; |
| } |
| } |
| |
| /* Low level routine to set a breakpoint. |
| Takes as args the three things that every breakpoint must have. |
| Returns the breakpoint object so caller can set other things. |
| Does not set the breakpoint number! |
| Does not print anything. |
| |
| ==> This routine should not be called if there is a chance of later |
| error(); otherwise it leaves a bogus breakpoint on the chain. Validate |
| your arguments BEFORE calling this routine! */ |
| |
| struct breakpoint * |
| set_raw_breakpoint (sal) |
| struct symtab_and_line sal; |
| { |
| 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->language = current_language->la_language; |
| b->input_radix = input_radix; |
| b->thread = -1; |
| b->line_number = sal.line; |
| b->enable = enabled; |
| b->next = 0; |
| b->silent = 0; |
| b->ignore_count = 0; |
| b->commands = NULL; |
| b->frame = 0; |
| 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 (sal.pc, sal.section); |
| breakpoints_changed (); |
| |
| return b; |
| } |
| |
| #ifdef GET_LONGJMP_TARGET |
| |
| static void |
| create_longjmp_breakpoint (func_name) |
| char *func_name; |
| { |
| struct symtab_and_line sal; |
| struct breakpoint *b; |
| |
| INIT_SAL (&sal); /* initialize to zeroes */ |
| if (func_name != NULL) |
| { |
| struct minimal_symbol *m; |
| |
| m = lookup_minimal_symbol_text (func_name, NULL, (struct objfile *)NULL); |
| if (m) |
| sal.pc = SYMBOL_VALUE_ADDRESS (m); |
| else |
| return; |
| } |
| sal.section = find_pc_overlay (sal.pc); |
| b = set_raw_breakpoint (sal); |
| if (!b) return; |
| |
| b->type = func_name != NULL ? bp_longjmp : bp_longjmp_resume; |
| b->disposition = donttouch; |
| b->enable = disabled; |
| b->silent = 1; |
| if (func_name) |
| b->addr_string = strsave(func_name); |
| b->number = internal_breakpoint_number--; |
| } |
| |
| #endif /* #ifdef GET_LONGJMP_TARGET */ |
| |
| /* 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() |
| { |
| register struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->type == bp_longjmp) |
| { |
| b->enable = enabled; |
| check_duplicates (b->address, b->section); |
| } |
| } |
| |
| void |
| disable_longjmp_breakpoint() |
| { |
| register struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if ( b->type == bp_longjmp |
| || b->type == bp_longjmp_resume) |
| { |
| b->enable = disabled; |
| check_duplicates (b->address, b->section); |
| } |
| } |
| |
| #ifdef SOLIB_ADD |
| void |
| remove_solib_event_breakpoints () |
| { |
| register struct breakpoint *b, *temp; |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| if (b->type == bp_shlib_event) |
| delete_breakpoint (b); |
| } |
| |
| void |
| create_solib_event_breakpoint (address) |
| CORE_ADDR address; |
| { |
| struct breakpoint *b; |
| struct symtab_and_line sal; |
| |
| INIT_SAL (&sal); /* initialize to zeroes */ |
| sal.pc = address; |
| sal.section = find_pc_overlay (sal.pc); |
| b = set_raw_breakpoint (sal); |
| b->number = internal_breakpoint_number--; |
| b->disposition = donttouch; |
| b->type = bp_shlib_event; |
| } |
| |
| void |
| disable_breakpoints_in_shlibs (silent) |
| 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 != shlib_disabled) && |
| (b->enable != call_disabled) && |
| ! b->duplicate && |
| PC_SOLIB (b->address)) |
| { |
| b->enable = shlib_disabled; |
| if (!silent) |
| { |
| if (!disabled_shlib_breaks) |
| { |
| target_terminal_ours_for_output (); |
| printf_filtered ("Temporarily disabling shared library breakpoints:\n"); |
| } |
| disabled_shlib_breaks = 1; |
| printf_filtered ("%d ", b->number); |
| } |
| } |
| #endif |
| } |
| if (disabled_shlib_breaks && !silent) |
| printf_filtered ("\n"); |
| } |
| |
| /* Try to reenable any breakpoints in shared libraries. */ |
| void |
| re_enable_breakpoints_in_shlibs () |
| { |
| struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->enable == 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 = enabled; |
| } |
| } |
| |
| #endif |
| |
| static void |
| create_solib_load_unload_event_breakpoint (hookname, tempflag, dll_pathname, cond_string, bp_kind) |
| char *hookname; |
| int tempflag; |
| char *dll_pathname; |
| char *cond_string; |
| enum bptype bp_kind; |
| { |
| struct breakpoint * b; |
| struct symtabs_and_lines sals; |
| struct symtab_and_line sal; |
| struct cleanup * old_chain; |
| struct cleanup * canonical_strings_chain = NULL; |
| int i; |
| 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 a 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 (free, sals.sals); |
| if (canonical != (char **)NULL) |
| { |
| make_cleanup (free, canonical); |
| canonical_strings_chain = make_cleanup (null_cleanup, 0); |
| if (canonical[0] != NULL) |
| make_cleanup (free, 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]); |
| 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 = enabled; |
| b->disposition = tempflag ? del : 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); |
| } |
| b->type = bp_kind; |
| |
| mention (b); |
| do_cleanups (old_chain); |
| } |
| |
| void |
| create_solib_load_event_breakpoint (hookname, tempflag, dll_pathname, cond_string) |
| char * hookname; |
| int tempflag; |
| char * dll_pathname; |
| char * cond_string; |
| { |
| create_solib_load_unload_event_breakpoint (hookname, |
| tempflag, |
| dll_pathname, |
| cond_string, |
| bp_catch_load); |
| } |
| |
| void |
| create_solib_unload_event_breakpoint (hookname, tempflag, dll_pathname, cond_string) |
| char * hookname; |
| int tempflag; |
| char * dll_pathname; |
| char * cond_string; |
| { |
| create_solib_load_unload_event_breakpoint (hookname, |
| tempflag, |
| dll_pathname, |
| cond_string, |
| bp_catch_unload); |
| } |
| |
| static void |
| create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_kind) |
| 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); |
| 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 = enabled; |
| b->disposition = tempflag ? del : donttouch; |
| b->forked_inferior_pid = 0; |
| |
| b->type = bp_kind; |
| |
| mention (b); |
| } |
| |
| void |
| create_fork_event_catchpoint (tempflag, cond_string) |
| int tempflag; |
| char * cond_string; |
| { |
| create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork); |
| } |
| |
| void |
| create_vfork_event_catchpoint (tempflag, cond_string) |
| int tempflag; |
| char * cond_string; |
| { |
| create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork); |
| } |
| |
| void |
| create_exec_event_catchpoint (tempflag, cond_string) |
| 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); |
| 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 = enabled; |
| b->disposition = tempflag ? del : donttouch; |
| |
| b->type = bp_catch_exec; |
| |
| mention (b); |
| } |
| |
| static int |
| hw_breakpoint_used_count() |
| { |
| register struct breakpoint *b; |
| int i = 0; |
| |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->type == bp_hardware_breakpoint && b->enable == enabled) |
| i++; |
| } |
| |
| return i; |
| } |
| |
| static int |
| hw_watchpoint_used_count(type, other_type_used) |
| enum bptype type; |
| int *other_type_used; |
| { |
| register struct breakpoint *b; |
| int i = 0; |
| |
| *other_type_used = 0; |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->enable == 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 == 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(pc, frame) |
| CORE_ADDR pc; |
| struct frame_info *frame; |
| { |
| register struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->type == bp_longjmp_resume) |
| { |
| b->address = pc; |
| b->enable = enabled; |
| if (frame != NULL) |
| b->frame = frame->frame; |
| else |
| b->frame = 0; |
| check_duplicates (b->address, b->section); |
| return; |
| } |
| } |
| |
| void |
| disable_watchpoints_before_interactive_call_start () |
| { |
| 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 == enabled)) |
| { |
| b->enable = call_disabled; |
| check_duplicates (b->address, b->section); |
| } |
| } |
| } |
| |
| void |
| enable_watchpoints_after_interactive_call_stop () |
| { |
| 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 == call_disabled)) |
| { |
| b->enable = enabled; |
| check_duplicates (b->address, b->section); |
| } |
| } |
| } |
| |
| |
| /* 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 (sal, frame, type) |
| struct symtab_and_line sal; |
| struct frame_info *frame; |
| enum bptype type; |
| { |
| register struct breakpoint *b; |
| b = set_raw_breakpoint (sal); |
| b->type = type; |
| b->enable = enabled; |
| b->disposition = donttouch; |
| b->frame = (frame ? frame->frame : 0); |
| |
| /* 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_pid)) |
| b->thread = pid_to_thread_id (inferior_pid); |
| |
| return b; |
| } |
| |
| |
| /* Tell the user we have just set a breakpoint B. */ |
| |
| static void |
| mention (b) |
| struct breakpoint *b; |
| { |
| int say_where = 0; |
| |
| /* 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); |
| |
| switch (b->type) |
| { |
| case bp_none: |
| printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number); |
| break; |
| case bp_watchpoint: |
| printf_filtered ("Watchpoint %d: ", b->number); |
| print_expression (b->exp, gdb_stdout); |
| break; |
| case bp_hardware_watchpoint: |
| printf_filtered ("Hardware watchpoint %d: ", b->number); |
| print_expression (b->exp, gdb_stdout); |
| break; |
| case bp_read_watchpoint: |
| printf_filtered ("Hardware read watchpoint %d: ", b->number); |
| print_expression (b->exp, gdb_stdout); |
| break; |
| case bp_access_watchpoint: |
| printf_filtered ("Hardware access (read/write) watchpoint %d: ",b->number); |
| print_expression (b->exp, gdb_stdout); |
| break; |
| case bp_breakpoint: |
| printf_filtered ("Breakpoint %d", b->number); |
| say_where = 1; |
| break; |
| case bp_hardware_breakpoint: |
| 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: |
| 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); |
| TUIDO(((TuiOpaqueFuncPtr)tui_vAllSetHasBreakAt, b, 1)); |
| TUIDO(((TuiOpaqueFuncPtr)tuiUpdateAllExecInfos)); |
| } |
| printf_filtered ("\n"); |
| } |
| |
| |
| /* 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 (arg, flag, from_tty) |
| char *arg; |
| int flag, from_tty; |
| { |
| int tempflag, hardwareflag; |
| struct symtabs_and_lines sals; |
| struct symtab_and_line sal; |
| register struct expression *cond = 0; |
| register struct breakpoint *b; |
| |
| /* Pointers in arg to the start, and one past the end, of the condition. */ |
| char *cond_start = NULL; |
| char *cond_end = NULL; |
| /* Pointers in arg to the start, and one past the end, |
| of the address part. */ |
| char *addr_start = NULL; |
| char *addr_end = NULL; |
| struct cleanup *old_chain; |
| struct cleanup *canonical_strings_chain = NULL; |
| char **canonical = (char **)NULL; |
| int i; |
| int thread; |
| |
| hardwareflag = flag & BP_HARDWAREFLAG; |
| tempflag = flag & BP_TEMPFLAG; |
| |
| sals.sals = NULL; |
| sals.nelts = 0; |
| |
| INIT_SAL (&sal); /* initialize to zeroes */ |
| |
| /* If no arg given, or if first arg is 'if ', use the default breakpoint. */ |
| |
| if (!arg || (arg[0] == 'i' && arg[1] == 'f' |
| && (arg[2] == ' ' || arg[2] == '\t'))) |
| { |
| if (default_breakpoint_valid) |
| { |
| 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 |
| { |
| addr_start = arg; |
| |
| /* 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. */ |
| if (default_breakpoint_valid |
| && (!current_source_symtab |
| || (arg && (*arg == '+' || *arg == '-')))) |
| sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, |
| default_breakpoint_line, &canonical); |
| else |
| sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, &canonical); |
| |
| addr_end = arg; |
| } |
| |
| if (! sals.nelts) |
| return; |
| |
| /* Make sure that all storage allocated in decode_line_1 gets freed in case |
| the following `for' loop errors out. */ |
| old_chain = make_cleanup (free, sals.sals); |
| if (canonical != (char **)NULL) |
| { |
| make_cleanup (free, canonical); |
| canonical_strings_chain = make_cleanup (null_cleanup, 0); |
| for (i = 0; i < sals.nelts; i++) |
| { |
| if (canonical[i] != NULL) |
| make_cleanup (free, canonical[i]); |
| } |
| } |
| |
| thread = -1; /* No specific thread yet */ |
| |
| /* Resolve all line numbers to PC's, and verify that conditions |
| can be parsed, before setting any breakpoints. */ |
| for (i = 0; i < sals.nelts; i++) |
| { |
| char *tok, *end_tok; |
| int toklen; |
| |
| 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)) |
| { |
| error ("Cannot break on %s without a running program.", addr_start); |
| } |
| |
| tok = arg; |
| |
| while (tok && *tok) |
| { |
| 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, block_for_pc (sals.sals[i].pc), 0); |
| cond_end = tok; |
| } |
| 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."); |
| } |
| } |
| if (hardwareflag) |
| { |
| int i, target_resources_ok; |
| |
| i = hw_breakpoint_used_count (); |
| 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."); |
| } |
| |
| /* Remove the canonical strings from the cleanup, they are needed below. */ |
| if (canonical != (char **)NULL) |
| discard_cleanups (canonical_strings_chain); |
| |
| /* Now set all the breakpoints. */ |
| for (i = 0; i < sals.nelts; i++) |
| { |
| sal = sals.sals[i]; |
| |
| if (from_tty) |
| describe_other_breakpoints (sal.pc, sal.section); |
| |
| b = set_raw_breakpoint (sal); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| b->type = hardwareflag ? bp_hardware_breakpoint : bp_breakpoint; |
| b->cond = cond; |
| b->thread = thread; |
| |
| /* If a canonical line spec is needed use that instead of the |
| command string. */ |
| if (canonical != (char **)NULL && canonical[i] != NULL) |
| b->addr_string = canonical[i]; |
| else if (addr_start) |
| b->addr_string = savestring (addr_start, addr_end - addr_start); |
| if (cond_start) |
| b->cond_string = savestring (cond_start, cond_end - cond_start); |
| |
| b->enable = enabled; |
| b->disposition = tempflag ? del : donttouch; |
| mention (b); |
| } |
| |
| if (sals.nelts > 1) |
| { |
| printf_filtered ("Multiple breakpoints were set.\n"); |
| printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); |
| } |
| do_cleanups (old_chain); |
| } |
| |
| static void |
| break_at_finish_at_depth_command_1 (arg, flag, from_tty) |
| char *arg; |
| int flag; |
| int from_tty; |
| { |
| struct frame_info *frame; |
| CORE_ADDR low, high, selected_pc = 0; |
| char *extra_args, *level_arg, *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 (selected_frame) |
| { |
| selected_pc = selected_frame->pc; |
| 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 = frame->pc; |
| 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%x %s", high, extra_args); |
| else |
| sprintf (addr_string, "*0x%x", high); |
| break_command_1 (addr_string, flag, from_tty); |
| free (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 (arg, flag, from_tty) |
| 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; |
| 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 (selected_frame) |
| { |
| addr_string = (char *) xmalloc (15); |
| sprintf (addr_string, "*0x%x", selected_frame->pc); |
| 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); |
| |
| free (beg_addr_string); |
| old_chain = make_cleanup (free, 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%x %s", high, extra_args); |
| else |
| sprintf (break_string, "*0x%x", high); |
| break_command_1 (break_string, flag, from_tty); |
| free(break_string); |
| } |
| else |
| error ("No function contains the specified address"); |
| } |
| if (sals.nelts > 1) |
| { |
| printf_filtered ("Multiple breakpoints were set.\n"); |
| printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); |
| } |
| do_cleanups(old_chain); |
| } |
| |
| |
| /* Helper function for break_command_1 and disassemble_command. */ |
| |
| void |
| resolve_sal_pc (sal) |
| 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 (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| break_command_1 (arg, 0, from_tty); |
| } |
| |
| static void |
| break_at_finish_command (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| break_at_finish_command_1 (arg, 0, from_tty); |
| } |
| |
| static void |
| break_at_finish_at_depth_command (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| break_at_finish_at_depth_command_1 (arg, 0, from_tty); |
| } |
| |
| void |
| tbreak_command (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| break_command_1 (arg, BP_TEMPFLAG, from_tty); |
| } |
| |
| static void |
| tbreak_at_finish_command (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty); |
| } |
| |
| static void |
| hbreak_command (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| break_command_1 (arg, BP_HARDWAREFLAG, from_tty); |
| } |
| |
| static void |
| thbreak_command (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty); |
| } |
| |
| static void |
| stop_command (arg, from_tty) |
| 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 (arg, from_tty) |
| 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 (arg, from_tty) |
| 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: 0: watch write, 1: watch read, 2: watch access(read or write) */ |
| static void |
| watch_command_1 (arg, accessflag, from_tty) |
| 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 == 1) bp_type = bp_read_watchpoint; |
| else if (accessflag == 2) 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 have this type of hardware watchpoint support."); |
| if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint) |
| error ("Target resources have been allocated for other types of watchpoints."); |
| } |
| |
| #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_pid |
| 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 */ |
| |
| /* Now set up the breakpoint. */ |
| b = set_raw_breakpoint (sal); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| b->disposition = 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 = frame->frame; |
| } |
| else |
| b->watchpoint_frame = (CORE_ADDR)0; |
| |
| if (mem_cnt && target_resources_ok > 0) |
| b->type = bp_type; |
| else |
| b->type = bp_watchpoint; |
| |
| /* 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; |
| struct symtab_and_line scope_sal; |
| |
| INIT_SAL (&scope_sal); /* initialize to zeroes */ |
| scope_sal.pc = get_frame_pc (prev_frame); |
| scope_sal.section = find_pc_overlay (scope_sal.pc); |
| |
| scope_breakpoint = set_raw_breakpoint (scope_sal); |
| set_breakpoint_count (breakpoint_count + 1); |
| scope_breakpoint->number = breakpoint_count; |
| |
| scope_breakpoint->type = bp_watchpoint_scope; |
| scope_breakpoint->enable = enabled; |
| |
| /* Automatically delete the breakpoint when it hits. */ |
| scope_breakpoint->disposition = del; |
| |
| /* Only break in the proper frame (help with recursion). */ |
| scope_breakpoint->frame = prev_frame->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 |
| |
| static int |
| can_use_hardware_watchpoint (v) |
| struct value *v; |
| { |
| int found_memory_cnt = 0; |
| |
| /* Did the user specifically forbid us to use hardware watchpoints? */ |
| if (! can_use_hw_watchpoints) |
| return 0; |
| |
| /* Make sure all the intermediate values are in memory. Also make sure |
| we found at least one memory expression. Guards against watch 0x12345, |
| which is meaningless, but could cause errors if one tries to insert a |
| hardware watchpoint for the constant expression. */ |
| for ( ; v; v = v->next) |
| { |
| if (v->lval == lval_memory) |
| { |
| if (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT (TYPE_LENGTH (VALUE_TYPE (v)))) |
| found_memory_cnt++; |
| } |
| else if (v->lval != not_lval && v->modifiable == 0) |
| return 0; |
| } |
| |
| /* The expression itself looks suitable for using a hardware |
| watchpoint, but give the target machine a chance to reject it. */ |
| return found_memory_cnt; |
| } |
| |
| static void watch_command (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| watch_command_1 (arg, 0, from_tty); |
| } |
| |
| static void rwatch_command (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| watch_command_1 (arg, 1, from_tty); |
| } |
| |
| static void awatch_command (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| watch_command_1 (arg, 2, from_tty); |
| } |
| |
| |
| /* Helper routine for the until_command routine in infcmd.c. Here |
| because it uses the mechanisms of breakpoints. */ |
| |
| /* ARGSUSED */ |
| void |
| until_break_command (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| struct symtabs_and_lines sals; |
| struct symtab_and_line sal; |
| struct frame_info *prev_frame = get_prev_frame (selected_frame); |
| struct breakpoint *breakpoint; |
| struct cleanup *old_chain; |
| |
| 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]; |
| free ((PTR)sals.sals); /* malloc'd, so freed */ |
| |
| if (*arg) |
| error ("Junk at end of arguments."); |
| |
| resolve_sal_pc (&sal); |
| |
| breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until); |
| |
| old_chain = make_cleanup ((make_cleanup_func) delete_breakpoint, breakpoint); |
| |
| /* Keep within the current frame */ |
| |
| if (prev_frame) |
| { |
| sal = find_pc_line (prev_frame->pc, 0); |
| sal.pc = prev_frame->pc; |
| breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until); |
| make_cleanup ((make_cleanup_func) delete_breakpoint, breakpoint); |
| } |
| |
| proceed (-1, TARGET_SIGNAL_DEFAULT, 0); |
| 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 (name) |
| char *name; |
| { |
| } |
| |
| static int |
| disable_catch_breakpoint () |
| { |
| } |
| |
| static int |
| delete_catch_breakpoint () |
| { |
| } |
| |
| static int |
| enable_catch_breakpoint () |
| { |
| } |
| #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 (args, function) |
| 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 (this_level_only) |
| 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 (selected_frame == NULL) |
| error ("No selected frame."); |
| block = get_frame_block (selected_frame); |
| pc = selected_frame->pc; |
| |
| 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); |
| int nsyms; |
| register int i; |
| register struct symbol *sym; |
| |
| nsyms = BLOCK_NSYMS (b); |
| |
| for (i = 0; i < nsyms; i++) |
| { |
| sym = BLOCK_SYM (b, i); |
| if (STREQ (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 (s) |
| 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 (arg) |
| 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 (arg) |
| 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 (arg) |
| 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; |
| |
| static void catch_fork_command_1 PARAMS ((catch_fork_kind fork_kind, char *arg, int tempflag, int from_tty)); |
| |
| static void |
| catch_fork_command_1 (fork_kind, arg, tempflag, from_tty) |
| 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; |
| } |
| } |
| |
| static void |
| catch_exec_command_1 (arg, tempflag, from_tty) |
| 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); |
| } |
| |
| #if defined(SOLIB_ADD) |
| static void |
| catch_load_command_1 (arg, tempflag, from_tty) |
| 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 (inferior_pid, tempflag, dll_pathname, cond_string); |
| } |
| |
| static void |
| catch_unload_command_1 (arg, tempflag, from_tty) |
| 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 (inferior_pid, 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 (tempflag, cond_string, ex_event, sal) |
| int tempflag; |
| char *cond_string; |
| enum exception_event_kind ex_event; |
| struct symtab_and_line *sal; |
| { |
| struct breakpoint * b; |
| int i; |
| int thread = -1; /* All threads. */ |
| |
| if (!sal) /* no exception support? */ |
| return; |
| |
| b = set_raw_breakpoint (*sal); |
| 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 = enabled; |
| b->disposition = tempflag ? del : donttouch; |
| switch (ex_event) |
| { |
| case EX_EVENT_THROW: |
| b->type = bp_catch_throw; |
| break; |
| case EX_EVENT_CATCH: |
| b->type = bp_catch_catch; |
| break; |
| default: /* error condition */ |
| b->type = bp_none; |
| b->enable = disabled; |
| error ("Internal error -- invalid catchpoint kind"); |
| } |
| mention (b); |
| } |
| |
| /* Deal with "catch catch" and "catch throw" commands */ |
| |
| static void |
| catch_exception_command_1 (ex_event, arg, tempflag, from_tty) |
| 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 () */ |
| |
| fprintf_filtered (gdb_stderr, "Unsupported with this platform/compiler combination.\n"); |
| fprintf_filtered (gdb_stderr, "Perhaps you can achieve the effect you want by setting\n"); |
| fprintf_filtered (gdb_stderr, "a breakpoint on __raise_exception().\n"); |
| } |
| } |
| } |
| |
| /* Cover routine to allow wrapping target_enable_exception_catchpoints |
| inside a catch_errors */ |
| |
| static int |
| cover_target_enable_exception_callback (arg) |
| PTR arg; |
| { |
| args_for_catchpoint_enable *args = arg; |
| struct symtab_and_line *sal; |
| sal = target_enable_exception_callback (args->kind, args->enable); |
| 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 (arg, tempflag, from_tty) |
| 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); |
| |
| b = set_raw_breakpoint (sal); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| b->type = bp_breakpoint; /* 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->cond = cond; |
| b->enable = enabled; |
| b->disposition = tempflag ? del : donttouch; |
| |
| mention (b); |
| } |
| |
| if (sals.nelts > 1) |
| { |
| printf_unfiltered ("Multiple breakpoints were set.\n"); |
| printf_unfiltered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); |
| } |
| free ((PTR)sals.sals); |
| } |
| |
| #if 0 |
| /* This creates a temporary internal breakpoint |
| just to placate infrun */ |
| static struct breakpoint * |
| create_temp_exception_breakpoint (pc) |
| CORE_ADDR pc; |
| { |
| struct symtab_and_line sal; |
| struct breakpoint *b; |
| |
| INIT_SAL(&sal); |
| sal.pc = pc; |
| sal.symtab = NULL; |
| sal.line = 0; |
| |
| b = set_raw_breakpoint (sal); |
| if (!b) |
| error ("Internal error -- couldn't set temp exception breakpoint"); |
| |
| b->type = bp_breakpoint; |
| b->disposition = del; |
| b->enable = enabled; |
| b->silent = 1; |
| b->number = internal_breakpoint_number--; |
| return b; |
| } |
| #endif |
| |
| static void |
| catch_command_1 (arg, tempflag, from_tty) |
| 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 (sal) |
| struct symtab_and_line sal; |
| { |
| struct breakpoint *b; |
| b = set_raw_breakpoint (sal); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| b->type = bp_breakpoint; |
| 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 (args) |
| 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 (args) |
| 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 (args) |
| char *args; |
| { |
| /* Map the delete command to catch clauses described in ARGS. */ |
| } |
| #endif /* 0 */ |
| |
| static void |
| catch_command (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| catch_command_1 (arg, 0, from_tty); |
| } |
| |
| |
| static void |
| tcatch_command (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| catch_command_1 (arg, 1, from_tty); |
| } |
| |
| |
| static void |
| clear_command (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| register struct breakpoint *b, *b1; |
| int default_match; |
| struct symtabs_and_lines sals; |
| struct symtab_and_line sal; |
| register struct breakpoint *found; |
| 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)); |
| 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. We do this in two loops: the first loop looks at |
| the initial bp(s) in the chain which should be deleted, |
| the second goes down the rest of the chain looking ahead |
| one so it can take those bps off the chain without messing |
| up the chain. */ |
| |
| |
| 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]; |
| found = (struct breakpoint *) 0; |
| |
| |
| while (breakpoint_chain |
| /* Why don't we check here that this is not |
| a watchpoint, etc., as we do below? |
| I can't make it fail, but don't know |
| what's stopping the failure: a watchpoint |
| of the same address as "sal.pc" should |
| wind up being deleted. */ |
| |
| && ( ((sal.pc && (breakpoint_chain->address == sal.pc)) && |
| (overlay_debugging == 0 || |
| breakpoint_chain->section == sal.section)) |
| || ((default_match || (0 == sal.pc)) |
| && breakpoint_chain->source_file != NULL |
| && sal.symtab != NULL |
| && STREQ (breakpoint_chain->source_file, sal.symtab->filename) |
| && breakpoint_chain->line_number == sal.line))) |
| |
| { |
| b1 = breakpoint_chain; |
| breakpoint_chain = b1->next; |
| b1->next = found; |
| found = b1; |
| } |
| |
| ALL_BREAKPOINTS (b) |
| |
| while (b->next |
| && b->next->type != bp_none |
| && b->next->type != bp_watchpoint |
| && b->next->type != bp_hardware_watchpoint |
| && b->next->type != bp_read_watchpoint |
| && b->next->type != bp_access_watchpoint |
| && ( ((sal.pc && (b->next->address == sal.pc)) && |
| (overlay_debugging == 0 || |
| b->next->section == sal.section)) |
| || ((default_match || (0 == sal.pc)) |
| && b->next->source_file != NULL |
| && sal.symtab != NULL |
| && STREQ (b->next->source_file, sal.symtab->filename) |
| && b->next->line_number == sal.line))) |
| |
| |
| { |
| b1 = b->next; |
| b->next = b1->next; |
| b1->next = found; |
| found = b1; |
| } |
| |
| 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); |
| b1 = found->next; |
| delete_breakpoint (found); |
| found = b1; |
| } |
| if (from_tty) putchar_unfiltered ('\n'); |
| } |
| free ((PTR)sals.sals); |
| } |
| |
| /* 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 (bs) |
| bpstat bs; |
| { |
| struct breakpoint *b, *temp; |
| |
| for (; bs; bs = bs->next) |
| if (bs->breakpoint_at && bs->breakpoint_at->disposition == del |
| && bs->stop) |
| delete_breakpoint (bs->breakpoint_at); |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| if (b->disposition == del_at_next_stop) |
| delete_breakpoint (b); |
| } |
| } |
| |
| /* Delete a breakpoint and clean up all traces of it in the data structures. */ |
| |
| void |
| delete_breakpoint (bpt) |
| 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); |
| |
| if (bpt->inserted) |
| remove_breakpoint (bpt, mark_uninserted); |
| |
| 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; |
| |
| sprintf (message, message1, bpt->number); /* Format possible error msg */ |
| args.kind = bpt->type == bp_catch_catch ? EX_EVENT_CATCH : EX_EVENT_THROW; |
| args.enable = 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; |
| } |
| |
| /* Before turning off the visuals for the bp, check to see that |
| there are no other bps at the same address. */ |
| if (tui_version) |
| { |
| int clearIt; |
| |
| ALL_BREAKPOINTS (b) |
| { |
| clearIt = (b->address != bpt->address); |
| if (!clearIt) |
| break; |
| } |
| |
| if (clearIt) |
| { |
| TUIDO(((TuiOpaqueFuncPtr)tui_vAllSetHasBreakAt, bpt, 0)); |
| TUIDO(((TuiOpaqueFuncPtr)tuiUpdateAllExecInfos)); |
| } |
| } |
| |
| check_duplicates (bpt->address, bpt->section); |
| /* 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 != disabled |
| && b->enable != shlib_disabled |
| && b->enable != call_disabled) |
| { |
| int val; |
| val = target_insert_breakpoint (b->address, b->shadow_contents); |
| if (val != 0) |
| { |
| target_terminal_ours_for_output (); |
| fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number); |
| memory_error (val, b->address); /* which bombs us out */ |
| } |
| else |
| b->inserted = 1; |
| } |
| } |
| |
| free_command_lines (&bpt->commands); |
| if (bpt->cond) |
| free (bpt->cond); |
| if (bpt->cond_string != NULL) |
| free (bpt->cond_string); |
| if (bpt->addr_string != NULL) |
| free (bpt->addr_string); |
| if (bpt->exp != NULL) |
| free (bpt->exp); |
| if (bpt->exp_string != NULL) |
| free (bpt->exp_string); |
| if (bpt->val != NULL) |
| value_free (bpt->val); |
| if (bpt->source_file != NULL) |
| free (bpt->source_file); |
| if (bpt->dll_pathname != NULL) |
| free (bpt->dll_pathname); |
| if (bpt->triggered_dll_pathname != NULL) |
| free (bpt->triggered_dll_pathname); |
| if (bpt->exec_pathname != NULL) |
| free (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; |
| |
| /* we'd call bpstat_clear_actions, but that free's stuff and due |
| to the multiple pointers pointing to one item with no |
| reference counts found anywhere through out the bpstat's (how |
| do you spell fragile?), we don't want to free things twice -- |
| better a memory leak than a corrupt malloc pool! */ |
| bs->commands = NULL; |
| bs->old_val = NULL; |
| } |
| /* 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; |
| |
| free ((PTR)bpt); |
| } |
| |
| void |
| delete_command (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| struct breakpoint *b, *temp; |
| |
| 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->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->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 (bint) |
| PTR bint; |
| { |
| struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */ |
| struct value *mark; |
| int i; |
| struct symtabs_and_lines sals; |
| char *s; |
| enum enable save_enable; |
| |
| switch (b->type) |
| { |
| case bp_none: |
| warning ("attempted to reset apparently deleted breakpoint #%d?\n", 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; |
| } |
| /* In case we have a problem, disable this breakpoint. We'll restore |
| its status if we succeed. */ |
| save_enable = b->enable; |
| b->enable = 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) |
| free ((PTR)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) |
| free (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 disable |
| 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 = save_enable; /* Restore it, this worked. */ |
| |
| |
| /* Now that this is re-enabled, check_duplicates |
| can be used. */ |
| check_duplicates (b->address, b->section); |
| |
| } |
| free ((PTR)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 functionnames. */ |
| /* So for now, just use a global context. */ |
| if (b->exp) |
| free ((PTR)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)) |
| value_fetch_lazy (b->val); |
| |
| if (b->cond_string != NULL) |
| { |
| s = b->cond_string; |
| if (b->cond) |
| free ((PTR)b->cond); |
| b->cond = parse_exp_1 (&s, (struct block *)0, 0); |
| } |
| if (b->enable == 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 breakpoints, they will be reset later by |
| breakpoint_re_set. */ |
| case bp_longjmp: |
| case bp_longjmp_resume: |
| 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: |
| |
| /* 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 () |
| { |
| 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) |
| { |
| sprintf (message, message1, b->number); /* Format possible error msg */ |
| catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL); |
| } |
| set_language (save_language); |
| input_radix = save_input_radix; |
| |
| #ifdef GET_LONGJMP_TARGET |
| create_longjmp_breakpoint ("longjmp"); |
| create_longjmp_breakpoint ("_longjmp"); |
| create_longjmp_breakpoint ("siglongjmp"); |
| create_longjmp_breakpoint ("_siglongjmp"); |
| create_longjmp_breakpoint (NULL); |
| #endif |
| |
| #if 0 |
| /* Took this out (temporarily at least), since it produces an extra |
| blank line at startup. This messes up the gdbtests. -PB */ |
| /* Blank line to finish off all those mention() messages we just printed. */ |
| printf_filtered ("\n"); |
| #endif |
| } |
| |
| /* 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). */ |
| |
| /* 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_pid. */ |
| void |
| breakpoint_re_set_thread (b) |
| struct breakpoint * b; |
| { |
| if (b->thread != -1) |
| { |
| if (in_thread_list (inferior_pid)) |
| b->thread = pid_to_thread_id (inferior_pid); |
| } |
| } |
| |
| void |
| set_ignore_count (bptnum, count, from_tty) |
| int bptnum, count, 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) |
| return; |
| else 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 (); |
| return; |
| } |
| |
| error ("No breakpoint number %d.", bptnum); |
| } |
| |
| /* Clear the ignore counts of all breakpoints. */ |
| void |
| breakpoint_clear_ignore_counts () |
| { |
| struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| b->ignore_count = 0; |
| } |
| |
| /* Command to set ignore-count of breakpoint N to COUNT. */ |
| |
| static void |
| ignore_command (args, from_tty) |
| 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 (*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); |
| printf_filtered ("\n"); |
| breakpoints_changed (); |
| } |
| |
| /* Call FUNCTION on each of the breakpoints |
| whose numbers are given in ARGS. */ |
| |
| static void |
| map_breakpoint_numbers (args, function) |
| char *args; |
| void (*function) PARAMS ((struct breakpoint *)); |
| { |
| register char *p = args; |
| char *p1; |
| register int num; |
| register struct breakpoint *b; |
| |
| if (p == 0) |
| error_no_arg ("one or more breakpoint numbers"); |
| |
| while (*p) |
| { |
| p1 = p; |
| |
| num = get_number (&p1); |
| |
| ALL_BREAKPOINTS (b) |
| if (b->number == num) |
| { |
| struct breakpoint *related_breakpoint = b->related_breakpoint; |
| function (b); |
| if (related_breakpoint) |
| function (related_breakpoint); |
| goto win; |
| } |
| printf_unfiltered ("No breakpoint number %d.\n", num); |
| win: |
| p = p1; |
| } |
| } |
| |
| void |
| disable_breakpoint (bpt) |
| 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; |
| |
| bpt->enable = disabled; |
| |
| check_duplicates (bpt->address, bpt->section); |
| |
| if (modify_breakpoint_hook) |
| modify_breakpoint_hook (bpt); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| disable_command (args, from_tty) |
| 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?\n", 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 (bpt, disposition) |
| 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."); |
| } |
| |
| bpt->enable = enabled; |
| bpt->disposition = disposition; |
| check_duplicates (bpt->address, bpt->section); |
| 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 = |
| |
| /* Ensure that we have the current frame. Else, this |
| next query may pessimistically be answered as, "No, |
| not within current scope". */ |
| get_current_frame (); |
| fr = find_frame_addr_in_frame_chain (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 = disabled; |
| return; |
| } |
| |
| save_selected_frame = selected_frame; |
| save_selected_frame_level = selected_frame_level; |
| select_frame (fr, -1); |
| } |
| |
| 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 = disabled; |
| value_free_to_mark (mark); |
| return; |
| } |
| } |
| |
| if (save_selected_frame_level >= 0) |
| select_and_print_frame (save_selected_frame, save_selected_frame_level); |
| value_free_to_mark (mark); |
| } |
| if (modify_breakpoint_hook) |
| modify_breakpoint_hook (bpt); |
| } |
| |
| void |
| enable_breakpoint (bpt) |
| 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 (args, from_tty) |
| 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?\n", 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 (bpt) |
| struct breakpoint *bpt; |
| { |
| do_enable_breakpoint (bpt, disable); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| enable_once_command (args, from_tty) |
| char *args; |
| int from_tty; |
| { |
| map_breakpoint_numbers (args, enable_once_breakpoint); |
| } |
| |
| static void |
| enable_delete_breakpoint (bpt) |
| struct breakpoint *bpt; |
| { |
| do_enable_breakpoint (bpt, del); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| enable_delete_command (args, from_tty) |
| 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 (string, funfirstline) |
| 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 () |
| { |
| 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. "); |
| |
| 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."); |
| add_com("txbreak", class_breakpoint, tbreak_at_finish_command, |
| "Set temporary breakpoint at procedure exit. Either there should\n\ |
| be no argument or the argument must be a depth.\n"); |
| |
| 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."); |
| |
| 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."); |
| |
| 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)); |
| |
| 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)); |
| 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); |
| |
| add_com("xbreak", class_breakpoint, break_at_finish_command, |
| concat("Set breakpoint at procedure exit. \n\ |
| Argument may be function name, or \"*\" and an address.\n\ |
| If function is specified, break at end of code for that function.\n\ |
| If an address is specified, break at the end of the function that contains \n\ |
| 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)); |
| add_com_alias ("xb", "xbreak", class_breakpoint, 1); |
| add_com_alias ("xbr", "xbreak", class_breakpoint, 1); |
| add_com_alias ("xbre", "xbreak", class_breakpoint, 1); |
| add_com_alias ("xbrea", "xbreak", class_breakpoint, 1); |
| |
| if (xdb_commands) |
| { |
| add_com_alias ("ba", "break", class_breakpoint, 1); |
| add_com_alias ("bu", "ubreak", class_breakpoint, 1); |
| add_com ("bx", class_breakpoint, break_at_finish_at_depth_command, |
| "Set breakpoint at procedure exit. Either there should\n\ |
| be no argument or the argument must be a depth.\n"); |
| } |
| |
| 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."); |
| |
| 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."); |
| |
| 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."); |
| |
| 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."); |
| |
| 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; |
| } |