| /* Print and select stack frames for GDB, the GNU debugger. |
| |
| Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, |
| 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 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 <ctype.h> |
| #include "defs.h" |
| #include "gdb_string.h" |
| #include "value.h" |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| #include "expression.h" |
| #include "language.h" |
| #include "frame.h" |
| #include "gdbcmd.h" |
| #include "gdbcore.h" |
| #include "target.h" |
| #include "source.h" |
| #include "breakpoint.h" |
| #include "demangle.h" |
| #include "inferior.h" |
| #include "annotate.h" |
| #include "ui-out.h" |
| #include "block.h" |
| #include "stack.h" |
| #include "gdb_assert.h" |
| #include "dictionary.h" |
| #include "reggroups.h" |
| #include "regcache.h" |
| |
| /* Prototypes for exported functions. */ |
| |
| void args_info (char *, int); |
| |
| void locals_info (char *, int); |
| |
| void (*selected_frame_level_changed_hook) (int); |
| |
| void _initialize_stack (void); |
| |
| /* Prototypes for local functions. */ |
| |
| static void down_command (char *, int); |
| |
| static void down_silently_base (char *); |
| |
| static void down_silently_command (char *, int); |
| |
| static void up_command (char *, int); |
| |
| static void up_silently_base (char *); |
| |
| static void up_silently_command (char *, int); |
| |
| void frame_command (char *, int); |
| |
| static void current_frame_command (char *, int); |
| |
| static void print_frame_arg_vars (struct frame_info *, struct ui_file *); |
| |
| static void catch_info (char *, int); |
| |
| static void args_plus_locals_info (char *, int); |
| |
| static void print_frame_label_vars (struct frame_info *, int, |
| struct ui_file *); |
| |
| static void print_frame_local_vars (struct frame_info *, int, |
| struct ui_file *); |
| |
| static int print_block_frame_labels (struct block *, int *, |
| struct ui_file *); |
| |
| static int print_block_frame_locals (struct block *, |
| struct frame_info *, |
| int, |
| struct ui_file *); |
| |
| static void print_frame (struct frame_info *fi, |
| int level, |
| int source, |
| int args, |
| struct symtab_and_line sal); |
| |
| static void backtrace_command (char *, int); |
| |
| struct frame_info *parse_frame_specification (char *); |
| |
| static void frame_info (char *, int); |
| |
| extern int addressprint; /* Print addresses, or stay symbolic only? */ |
| |
| /* Zero means do things normally; we are interacting directly with the |
| user. One means print the full filename and linenumber when a |
| frame is printed, and do so in a format emacs18/emacs19.22 can |
| parse. Two means print similar annotations, but in many more |
| cases and in a slightly different syntax. */ |
| |
| int annotation_level = 0; |
| |
| |
| struct print_stack_frame_args |
| { |
| struct frame_info *fi; |
| int level; |
| int source; |
| int args; |
| }; |
| |
| /* Show or print the frame arguments. |
| Pass the args the way catch_errors wants them. */ |
| static int print_stack_frame_stub (void *args); |
| static int |
| print_stack_frame_stub (void *args) |
| { |
| struct print_stack_frame_args *p = (struct print_stack_frame_args *) args; |
| |
| print_frame_info (p->fi, p->level, p->source, p->args); |
| return 0; |
| } |
| |
| /* Show or print a stack frame briefly. FRAME_INFI should be the frame info |
| and LEVEL should be its level in the stack (or -1 for level not defined). |
| This prints the level, the function executing, the arguments, |
| and the file name and line number. |
| If the pc is not at the beginning of the source line, |
| the actual pc is printed at the beginning. |
| |
| If SOURCE is 1, print the source line as well. |
| If SOURCE is -1, print ONLY the source line. */ |
| |
| void |
| print_stack_frame (struct frame_info *fi, int level, int source) |
| { |
| struct print_stack_frame_args args; |
| |
| args.fi = fi; |
| args.level = level; |
| args.source = source; |
| args.args = 1; |
| |
| catch_errors (print_stack_frame_stub, (char *) &args, "", RETURN_MASK_ALL); |
| } |
| |
| struct print_args_args |
| { |
| struct symbol *func; |
| struct frame_info *fi; |
| struct ui_file *stream; |
| }; |
| |
| static int print_args_stub (void *); |
| |
| /* Print nameless args on STREAM. |
| FI is the frameinfo for this frame, START is the offset |
| of the first nameless arg, and NUM is the number of nameless args to |
| print. FIRST is nonzero if this is the first argument (not just |
| the first nameless arg). */ |
| |
| static void |
| print_frame_nameless_args (struct frame_info *fi, long start, int num, |
| int first, struct ui_file *stream) |
| { |
| int i; |
| CORE_ADDR argsaddr; |
| long arg_value; |
| |
| for (i = 0; i < num; i++) |
| { |
| QUIT; |
| argsaddr = get_frame_args_address (fi); |
| if (!argsaddr) |
| return; |
| arg_value = read_memory_integer (argsaddr + start, sizeof (int)); |
| if (!first) |
| fprintf_filtered (stream, ", "); |
| fprintf_filtered (stream, "%ld", arg_value); |
| first = 0; |
| start += sizeof (int); |
| } |
| } |
| |
| /* Print the arguments of a stack frame, given the function FUNC |
| running in that frame (as a symbol), the info on the frame, |
| and the number of args according to the stack frame (or -1 if unknown). */ |
| |
| /* References here and elsewhere to "number of args according to the |
| stack frame" appear in all cases to refer to "number of ints of args |
| according to the stack frame". At least for VAX, i386, isi. */ |
| |
| static void |
| print_frame_args (struct symbol *func, struct frame_info *fi, int num, |
| struct ui_file *stream) |
| { |
| struct block *b = NULL; |
| int first = 1; |
| struct dict_iterator iter; |
| struct symbol *sym; |
| struct value *val; |
| /* Offset of next stack argument beyond the one we have seen that is |
| at the highest offset. |
| -1 if we haven't come to a stack argument yet. */ |
| long highest_offset = -1; |
| int arg_size; |
| /* Number of ints of arguments that we have printed so far. */ |
| int args_printed = 0; |
| struct cleanup *old_chain, *list_chain; |
| struct ui_stream *stb; |
| |
| stb = ui_out_stream_new (uiout); |
| old_chain = make_cleanup_ui_out_stream_delete (stb); |
| |
| if (func) |
| { |
| b = SYMBOL_BLOCK_VALUE (func); |
| |
| ALL_BLOCK_SYMBOLS (b, iter, sym) |
| { |
| QUIT; |
| |
| /* Keep track of the highest stack argument offset seen, and |
| skip over any kinds of symbols we don't care about. */ |
| |
| switch (SYMBOL_CLASS (sym)) |
| { |
| case LOC_ARG: |
| case LOC_REF_ARG: |
| { |
| long current_offset = SYMBOL_VALUE (sym); |
| arg_size = TYPE_LENGTH (SYMBOL_TYPE (sym)); |
| |
| /* Compute address of next argument by adding the size of |
| this argument and rounding to an int boundary. */ |
| current_offset = |
| ((current_offset + arg_size + sizeof (int) - 1) |
| & ~(sizeof (int) - 1)); |
| |
| /* If this is the highest offset seen yet, set highest_offset. */ |
| if (highest_offset == -1 |
| || (current_offset > highest_offset)) |
| highest_offset = current_offset; |
| |
| /* Add the number of ints we're about to print to args_printed. */ |
| args_printed += (arg_size + sizeof (int) - 1) / sizeof (int); |
| } |
| |
| /* We care about types of symbols, but don't need to keep track of |
| stack offsets in them. */ |
| case LOC_REGPARM: |
| case LOC_REGPARM_ADDR: |
| case LOC_LOCAL_ARG: |
| case LOC_BASEREG_ARG: |
| case LOC_COMPUTED_ARG: |
| break; |
| |
| /* Other types of symbols we just skip over. */ |
| default: |
| continue; |
| } |
| |
| /* We have to look up the symbol because arguments can have |
| two entries (one a parameter, one a local) and the one we |
| want is the local, which lookup_symbol will find for us. |
| This includes gcc1 (not gcc2) on the sparc when passing a |
| small structure and gcc2 when the argument type is float |
| and it is passed as a double and converted to float by |
| the prologue (in the latter case the type of the LOC_ARG |
| symbol is double and the type of the LOC_LOCAL symbol is |
| float). */ |
| /* But if the parameter name is null, don't try it. |
| Null parameter names occur on the RS/6000, for traceback tables. |
| FIXME, should we even print them? */ |
| |
| if (*DEPRECATED_SYMBOL_NAME (sym)) |
| { |
| struct symbol *nsym; |
| nsym = lookup_symbol |
| (DEPRECATED_SYMBOL_NAME (sym), |
| b, VAR_DOMAIN, (int *) NULL, (struct symtab **) NULL); |
| if (SYMBOL_CLASS (nsym) == LOC_REGISTER) |
| { |
| /* There is a LOC_ARG/LOC_REGISTER pair. This means that |
| it was passed on the stack and loaded into a register, |
| or passed in a register and stored in a stack slot. |
| GDB 3.x used the LOC_ARG; GDB 4.0-4.11 used the LOC_REGISTER. |
| |
| Reasons for using the LOC_ARG: |
| (1) because find_saved_registers may be slow for remote |
| debugging, |
| (2) because registers are often re-used and stack slots |
| rarely (never?) are. Therefore using the stack slot is |
| much less likely to print garbage. |
| |
| Reasons why we might want to use the LOC_REGISTER: |
| (1) So that the backtrace prints the same value as |
| "print foo". I see no compelling reason why this needs |
| to be the case; having the backtrace print the value which |
| was passed in, and "print foo" print the value as modified |
| within the called function, makes perfect sense to me. |
| |
| Additional note: It might be nice if "info args" displayed |
| both values. |
| One more note: There is a case with sparc structure passing |
| where we need to use the LOC_REGISTER, but this is dealt with |
| by creating a single LOC_REGPARM in symbol reading. */ |
| |
| /* Leave sym (the LOC_ARG) alone. */ |
| ; |
| } |
| else |
| sym = nsym; |
| } |
| |
| /* Print the current arg. */ |
| if (!first) |
| ui_out_text (uiout, ", "); |
| ui_out_wrap_hint (uiout, " "); |
| |
| annotate_arg_begin (); |
| |
| list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); |
| fprintf_symbol_filtered (stb->stream, SYMBOL_PRINT_NAME (sym), |
| SYMBOL_LANGUAGE (sym), DMGL_PARAMS | DMGL_ANSI); |
| ui_out_field_stream (uiout, "name", stb); |
| annotate_arg_name_end (); |
| ui_out_text (uiout, "="); |
| |
| /* Avoid value_print because it will deref ref parameters. We just |
| want to print their addresses. Print ??? for args whose address |
| we do not know. We pass 2 as "recurse" to val_print because our |
| standard indentation here is 4 spaces, and val_print indents |
| 2 for each recurse. */ |
| val = read_var_value (sym, fi); |
| |
| annotate_arg_value (val == NULL ? NULL : VALUE_TYPE (val)); |
| |
| if (val) |
| { |
| val_print (VALUE_TYPE (val), VALUE_CONTENTS (val), 0, |
| VALUE_ADDRESS (val), |
| stb->stream, 0, 0, 2, Val_no_prettyprint); |
| ui_out_field_stream (uiout, "value", stb); |
| } |
| else |
| ui_out_text (uiout, "???"); |
| |
| /* Invoke ui_out_tuple_end. */ |
| do_cleanups (list_chain); |
| |
| annotate_arg_end (); |
| |
| first = 0; |
| } |
| } |
| |
| /* Don't print nameless args in situations where we don't know |
| enough about the stack to find them. */ |
| if (num != -1) |
| { |
| long start; |
| |
| if (highest_offset == -1) |
| start = FRAME_ARGS_SKIP; |
| else |
| start = highest_offset; |
| |
| print_frame_nameless_args (fi, start, num - args_printed, |
| first, stream); |
| } |
| do_cleanups (old_chain); |
| } |
| |
| /* Pass the args the way catch_errors wants them. */ |
| |
| static int |
| print_args_stub (void *args) |
| { |
| int numargs; |
| struct print_args_args *p = (struct print_args_args *) args; |
| |
| if (FRAME_NUM_ARGS_P ()) |
| { |
| numargs = FRAME_NUM_ARGS (p->fi); |
| gdb_assert (numargs >= 0); |
| } |
| else |
| numargs = -1; |
| print_frame_args (p->func, p->fi, numargs, p->stream); |
| return 0; |
| } |
| |
| /* Print information about a frame for frame "fi" at level "level". |
| Used in "where" output, also used to emit breakpoint or step |
| messages. |
| LEVEL is the level of the frame, or -1 if it is the |
| innermost frame but we don't want to print the level. |
| The meaning of the SOURCE argument is: |
| SRC_LINE: Print only source line |
| LOCATION: Print only location |
| LOC_AND_SRC: Print location and source line. */ |
| |
| void |
| print_frame_info (struct frame_info *fi, int level, int source, int args) |
| { |
| struct symtab_and_line sal; |
| int source_print; |
| int location_print; |
| |
| if (get_frame_type (fi) == DUMMY_FRAME |
| || get_frame_type (fi) == SIGTRAMP_FRAME) |
| { |
| struct cleanup *uiout_cleanup |
| = make_cleanup_ui_out_tuple_begin_end (uiout, "frame"); |
| |
| annotate_frame_begin (level == -1 ? 0 : level, get_frame_pc (fi)); |
| |
| /* Do this regardless of SOURCE because we don't have any source |
| to list for this frame. */ |
| if (level >= 0) |
| { |
| ui_out_text (uiout, "#"); |
| ui_out_field_fmt_int (uiout, 2, ui_left, "level", level); |
| } |
| if (ui_out_is_mi_like_p (uiout)) |
| { |
| annotate_frame_address (); |
| ui_out_field_core_addr (uiout, "addr", get_frame_pc (fi)); |
| annotate_frame_address_end (); |
| } |
| |
| if (get_frame_type (fi) == DUMMY_FRAME) |
| { |
| annotate_function_call (); |
| ui_out_field_string (uiout, "func", "<function called from gdb>"); |
| } |
| else if (get_frame_type (fi) == SIGTRAMP_FRAME) |
| { |
| annotate_signal_handler_caller (); |
| ui_out_field_string (uiout, "func", "<signal handler called>"); |
| } |
| ui_out_text (uiout, "\n"); |
| annotate_frame_end (); |
| |
| do_cleanups (uiout_cleanup); |
| return; |
| } |
| |
| /* If fi is not the innermost frame, that normally means that fi->pc |
| points to *after* the call instruction, and we want to get the |
| line containing the call, never the next line. But if the next |
| frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the next frame |
| was not entered as the result of a call, and we want to get the |
| line containing fi->pc. */ |
| find_frame_sal (fi, &sal); |
| |
| location_print = (source == LOCATION |
| || source == LOC_AND_ADDRESS |
| || source == SRC_AND_LOC); |
| |
| if (location_print || !sal.symtab) |
| print_frame (fi, level, source, args, sal); |
| |
| source_print = (source == SRC_LINE || source == SRC_AND_LOC); |
| |
| if (sal.symtab) |
| set_current_source_symtab_and_line (&sal); |
| |
| if (source_print && sal.symtab) |
| { |
| struct symtab_and_line cursal; |
| int done = 0; |
| int mid_statement = (source == SRC_LINE) && (get_frame_pc (fi) != sal.pc); |
| |
| if (annotation_level) |
| done = identify_source_line (sal.symtab, sal.line, mid_statement, |
| get_frame_pc (fi)); |
| if (!done) |
| { |
| if (print_frame_info_listing_hook) |
| print_frame_info_listing_hook (sal.symtab, sal.line, sal.line + 1, 0); |
| else |
| { |
| /* We used to do this earlier, but that is clearly |
| wrong. This function is used by many different |
| parts of gdb, including normal_stop in infrun.c, |
| which uses this to print out the current PC |
| when we stepi/nexti into the middle of a source |
| line. Only the command line really wants this |
| behavior. Other UIs probably would like the |
| ability to decide for themselves if it is desired. */ |
| if (addressprint && mid_statement) |
| { |
| ui_out_field_core_addr (uiout, "addr", get_frame_pc (fi)); |
| ui_out_text (uiout, "\t"); |
| } |
| |
| print_source_lines (sal.symtab, sal.line, sal.line + 1, 0); |
| } |
| } |
| /* Make sure we have at least a default source file */ |
| set_default_source_symtab_and_line (); |
| cursal = get_current_source_symtab_and_line (); |
| cursal.line = max (sal.line - get_lines_to_list () / 2, 1); |
| set_current_source_symtab_and_line (&cursal); |
| } |
| |
| if (source != 0) |
| set_default_breakpoint (1, get_frame_pc (fi), sal.symtab, sal.line); |
| |
| annotate_frame_end (); |
| |
| gdb_flush (gdb_stdout); |
| } |
| |
| static void |
| print_frame (struct frame_info *fi, |
| int level, |
| int source, |
| int args, |
| struct symtab_and_line sal) |
| { |
| struct symbol *func; |
| char *funname = 0; |
| enum language funlang = language_unknown; |
| struct ui_stream *stb; |
| struct cleanup *old_chain; |
| struct cleanup *list_chain; |
| |
| stb = ui_out_stream_new (uiout); |
| old_chain = make_cleanup_ui_out_stream_delete (stb); |
| |
| func = find_pc_function (get_frame_address_in_block (fi)); |
| if (func) |
| { |
| /* In certain pathological cases, the symtabs give the wrong |
| function (when we are in the first function in a file which |
| is compiled without debugging symbols, the previous function |
| is compiled with debugging symbols, and the "foo.o" symbol |
| that is supposed to tell us where the file with debugging symbols |
| ends has been truncated by ar because it is longer than 15 |
| characters). This also occurs if the user uses asm() to create |
| a function but not stabs for it (in a file compiled -g). |
| |
| So look in the minimal symbol tables as well, and if it comes |
| up with a larger address for the function use that instead. |
| I don't think this can ever cause any problems; there shouldn't |
| be any minimal symbols in the middle of a function; if this is |
| ever changed many parts of GDB will need to be changed (and we'll |
| create a find_pc_minimal_function or some such). */ |
| |
| struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (get_frame_address_in_block (fi)); |
| if (msymbol != NULL |
| && (SYMBOL_VALUE_ADDRESS (msymbol) |
| > BLOCK_START (SYMBOL_BLOCK_VALUE (func)))) |
| { |
| #if 0 |
| /* There is no particular reason to think the line number |
| information is wrong. Someone might have just put in |
| a label with asm() but left the line numbers alone. */ |
| /* In this case we have no way of knowing the source file |
| and line number, so don't print them. */ |
| sal.symtab = 0; |
| #endif |
| /* We also don't know anything about the function besides |
| its address and name. */ |
| func = 0; |
| funname = DEPRECATED_SYMBOL_NAME (msymbol); |
| funlang = SYMBOL_LANGUAGE (msymbol); |
| } |
| else |
| { |
| /* I'd like to use SYMBOL_PRINT_NAME() here, to display the |
| demangled name that we already have stored in the symbol |
| table, but we stored a version with DMGL_PARAMS turned |
| on, and here we don't want to display parameters. So call |
| the demangler again, with DMGL_ANSI only. (Yes, I know |
| that printf_symbol_filtered() will again try to demangle |
| the name on the fly, but the issue is that if |
| cplus_demangle() fails here, it'll fail there too. So we |
| want to catch the failure ("demangled==NULL" case below) |
| here, while we still have our hands on the function |
| symbol.) */ |
| char *demangled; |
| funname = DEPRECATED_SYMBOL_NAME (func); |
| funlang = SYMBOL_LANGUAGE (func); |
| if (funlang == language_cplus) |
| { |
| demangled = cplus_demangle (funname, DMGL_ANSI); |
| if (demangled == NULL) |
| /* If the demangler fails, try the demangled name from |
| the symbol table. This'll have parameters, but |
| that's preferable to diplaying a mangled name. */ |
| funname = SYMBOL_PRINT_NAME (func); |
| } |
| } |
| } |
| else |
| { |
| struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (get_frame_address_in_block (fi)); |
| if (msymbol != NULL) |
| { |
| funname = DEPRECATED_SYMBOL_NAME (msymbol); |
| funlang = SYMBOL_LANGUAGE (msymbol); |
| } |
| } |
| |
| annotate_frame_begin (level == -1 ? 0 : level, get_frame_pc (fi)); |
| |
| list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "frame"); |
| |
| if (level >= 0) |
| { |
| ui_out_text (uiout, "#"); |
| ui_out_field_fmt_int (uiout, 2, ui_left, "level", level); |
| } |
| if (addressprint) |
| if (get_frame_pc (fi) != sal.pc |
| || !sal.symtab |
| || source == LOC_AND_ADDRESS) |
| { |
| annotate_frame_address (); |
| ui_out_field_core_addr (uiout, "addr", get_frame_pc (fi)); |
| annotate_frame_address_end (); |
| ui_out_text (uiout, " in "); |
| } |
| annotate_frame_function_name (); |
| fprintf_symbol_filtered (stb->stream, funname ? funname : "??", funlang, |
| DMGL_ANSI); |
| ui_out_field_stream (uiout, "func", stb); |
| ui_out_wrap_hint (uiout, " "); |
| annotate_frame_args (); |
| |
| ui_out_text (uiout, " ("); |
| if (args) |
| { |
| struct print_args_args args; |
| struct cleanup *args_list_chain; |
| args.fi = fi; |
| args.func = func; |
| args.stream = gdb_stdout; |
| args_list_chain = make_cleanup_ui_out_list_begin_end (uiout, "args"); |
| catch_errors (print_args_stub, &args, "", RETURN_MASK_ALL); |
| /* FIXME: args must be a list. If one argument is a string it will |
| have " that will not be properly escaped. */ |
| /* Invoke ui_out_tuple_end. */ |
| do_cleanups (args_list_chain); |
| QUIT; |
| } |
| ui_out_text (uiout, ")"); |
| if (sal.symtab && sal.symtab->filename) |
| { |
| annotate_frame_source_begin (); |
| ui_out_wrap_hint (uiout, " "); |
| ui_out_text (uiout, " at "); |
| annotate_frame_source_file (); |
| ui_out_field_string (uiout, "file", sal.symtab->filename); |
| annotate_frame_source_file_end (); |
| ui_out_text (uiout, ":"); |
| annotate_frame_source_line (); |
| ui_out_field_int (uiout, "line", sal.line); |
| annotate_frame_source_end (); |
| } |
| |
| #ifdef PC_SOLIB |
| if (!funname || (!sal.symtab || !sal.symtab->filename)) |
| { |
| char *lib = PC_SOLIB (get_frame_pc (fi)); |
| if (lib) |
| { |
| annotate_frame_where (); |
| ui_out_wrap_hint (uiout, " "); |
| ui_out_text (uiout, " from "); |
| ui_out_field_string (uiout, "from", lib); |
| } |
| } |
| #endif /* PC_SOLIB */ |
| |
| /* do_cleanups will call ui_out_tuple_end() for us. */ |
| do_cleanups (list_chain); |
| ui_out_text (uiout, "\n"); |
| do_cleanups (old_chain); |
| } |
| |
| /* Show the frame info. If this is the tui, it will be shown in |
| the source display otherwise, nothing is done */ |
| void |
| show_stack_frame (struct frame_info *fi) |
| { |
| } |
| |
| |
| /* Read a frame specification in whatever the appropriate format is. |
| Call error() if the specification is in any way invalid (i.e. |
| this function never returns NULL). */ |
| |
| struct frame_info * |
| parse_frame_specification (char *frame_exp) |
| { |
| int numargs = 0; |
| #define MAXARGS 4 |
| CORE_ADDR args[MAXARGS]; |
| int level; |
| |
| if (frame_exp) |
| { |
| char *addr_string, *p; |
| struct cleanup *tmp_cleanup; |
| |
| while (*frame_exp == ' ') |
| frame_exp++; |
| |
| while (*frame_exp) |
| { |
| if (numargs > MAXARGS) |
| error ("Too many args in frame specification"); |
| /* Parse an argument. */ |
| for (p = frame_exp; *p && *p != ' '; p++) |
| ; |
| addr_string = savestring (frame_exp, p - frame_exp); |
| |
| { |
| struct value *vp; |
| |
| tmp_cleanup = make_cleanup (xfree, addr_string); |
| |
| /* NOTE: we call parse_and_eval and then both |
| value_as_long and value_as_address rather than calling |
| parse_and_eval_long and parse_and_eval_address because |
| of the issue of potential side effects from evaluating |
| the expression. */ |
| vp = parse_and_eval (addr_string); |
| if (numargs == 0) |
| level = value_as_long (vp); |
| |
| args[numargs++] = value_as_address (vp); |
| do_cleanups (tmp_cleanup); |
| } |
| |
| /* Skip spaces, move to possible next arg. */ |
| while (*p == ' ') |
| p++; |
| frame_exp = p; |
| } |
| } |
| |
| switch (numargs) |
| { |
| case 0: |
| if (deprecated_selected_frame == NULL) |
| error ("No selected frame."); |
| return deprecated_selected_frame; |
| /* NOTREACHED */ |
| case 1: |
| { |
| struct frame_info *fid = |
| find_relative_frame (get_current_frame (), &level); |
| struct frame_info *tfid; |
| |
| if (level == 0) |
| /* find_relative_frame was successful */ |
| return fid; |
| |
| /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications |
| take at least 2 addresses. It is important to detect this case |
| here so that "frame 100" does not give a confusing error message |
| like "frame specification requires two addresses". This of course |
| does not solve the "frame 100" problem for machines on which |
| a frame specification can be made with one address. To solve |
| that, we need a new syntax for a specifying a frame by address. |
| I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for |
| two args, etc.), but people might think that is too much typing, |
| so I guess *0x23,0x45 would be a possible alternative (commas |
| really should be used instead of spaces to delimit; using spaces |
| normally works in an expression). */ |
| #ifdef SETUP_ARBITRARY_FRAME |
| error ("No frame %s", paddr_d (args[0])); |
| #endif |
| |
| /* If (s)he specifies the frame with an address, he deserves what |
| (s)he gets. Still, give the highest one that matches. */ |
| |
| for (fid = get_current_frame (); |
| fid && get_frame_base (fid) != args[0]; |
| fid = get_prev_frame (fid)) |
| ; |
| |
| if (fid) |
| while ((tfid = get_prev_frame (fid)) && |
| (get_frame_base (tfid) == args[0])) |
| fid = tfid; |
| |
| /* We couldn't identify the frame as an existing frame, but |
| perhaps we can create one with a single argument. */ |
| } |
| |
| default: |
| #ifdef SETUP_ARBITRARY_FRAME |
| return SETUP_ARBITRARY_FRAME (numargs, args); |
| #else |
| /* Usual case. Do it here rather than have everyone supply |
| a SETUP_ARBITRARY_FRAME that does this. */ |
| if (numargs == 1) |
| return create_new_frame (args[0], 0); |
| error ("Too many args in frame specification"); |
| #endif |
| /* NOTREACHED */ |
| } |
| /* NOTREACHED */ |
| } |
| |
| /* Print verbosely the selected frame or the frame at address ADDR. |
| This means absolutely all information in the frame is printed. */ |
| |
| static void |
| frame_info (char *addr_exp, int from_tty) |
| { |
| struct frame_info *fi; |
| struct symtab_and_line sal; |
| struct symbol *func; |
| struct symtab *s; |
| struct frame_info *calling_frame_info; |
| int i, count, numregs; |
| char *funname = 0; |
| enum language funlang = language_unknown; |
| const char *pc_regname; |
| |
| if (!target_has_stack) |
| error ("No stack."); |
| |
| /* Name of the value returned by get_frame_pc(). Per comments, "pc" |
| is not a good name. */ |
| if (PC_REGNUM >= 0) |
| /* OK, this is weird. The PC_REGNUM hardware register's value can |
| easily not match that of the internal value returned by |
| get_frame_pc(). */ |
| pc_regname = REGISTER_NAME (PC_REGNUM); |
| else |
| /* But then, this is weird to. Even without PC_REGNUM, an |
| architectures will often have a hardware register called "pc", |
| and that register's value, again, can easily not match |
| get_frame_pc(). */ |
| pc_regname = "pc"; |
| |
| fi = parse_frame_specification (addr_exp); |
| if (fi == NULL) |
| error ("Invalid frame specified."); |
| |
| find_frame_sal (fi, &sal); |
| func = get_frame_function (fi); |
| /* FIXME: cagney/2002-11-28: Why bother? Won't sal.symtab contain |
| the same value. */ |
| s = find_pc_symtab (get_frame_pc (fi)); |
| if (func) |
| { |
| /* I'd like to use SYMBOL_PRINT_NAME() here, to display |
| * the demangled name that we already have stored in |
| * the symbol table, but we stored a version with |
| * DMGL_PARAMS turned on, and here we don't want |
| * to display parameters. So call the demangler again, |
| * with DMGL_ANSI only. RT |
| * (Yes, I know that printf_symbol_filtered() will |
| * again try to demangle the name on the fly, but |
| * the issue is that if cplus_demangle() fails here, |
| * it'll fail there too. So we want to catch the failure |
| * ("demangled==NULL" case below) here, while we still |
| * have our hands on the function symbol.) |
| */ |
| char *demangled; |
| funname = DEPRECATED_SYMBOL_NAME (func); |
| funlang = SYMBOL_LANGUAGE (func); |
| if (funlang == language_cplus) |
| { |
| demangled = cplus_demangle (funname, DMGL_ANSI); |
| /* If the demangler fails, try the demangled name |
| * from the symbol table. This'll have parameters, |
| * but that's preferable to diplaying a mangled name. |
| */ |
| if (demangled == NULL) |
| funname = SYMBOL_PRINT_NAME (func); |
| } |
| } |
| else |
| { |
| struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (get_frame_pc (fi)); |
| if (msymbol != NULL) |
| { |
| funname = DEPRECATED_SYMBOL_NAME (msymbol); |
| funlang = SYMBOL_LANGUAGE (msymbol); |
| } |
| } |
| calling_frame_info = get_prev_frame (fi); |
| |
| if (!addr_exp && frame_relative_level (deprecated_selected_frame) >= 0) |
| { |
| printf_filtered ("Stack level %d, frame at ", |
| frame_relative_level (deprecated_selected_frame)); |
| print_address_numeric (get_frame_base (fi), 1, gdb_stdout); |
| printf_filtered (":\n"); |
| } |
| else |
| { |
| printf_filtered ("Stack frame at "); |
| print_address_numeric (get_frame_base (fi), 1, gdb_stdout); |
| printf_filtered (":\n"); |
| } |
| printf_filtered (" %s = ", pc_regname); |
| print_address_numeric (get_frame_pc (fi), 1, gdb_stdout); |
| |
| wrap_here (" "); |
| if (funname) |
| { |
| printf_filtered (" in "); |
| fprintf_symbol_filtered (gdb_stdout, funname, funlang, |
| DMGL_ANSI | DMGL_PARAMS); |
| } |
| wrap_here (" "); |
| if (sal.symtab) |
| printf_filtered (" (%s:%d)", sal.symtab->filename, sal.line); |
| puts_filtered ("; "); |
| wrap_here (" "); |
| printf_filtered ("saved %s ", pc_regname); |
| print_address_numeric (frame_pc_unwind (fi), 1, gdb_stdout); |
| printf_filtered ("\n"); |
| |
| { |
| int frameless; |
| frameless = FRAMELESS_FUNCTION_INVOCATION (fi); |
| if (frameless) |
| printf_filtered (" (FRAMELESS),"); |
| } |
| |
| if (calling_frame_info) |
| { |
| printf_filtered (" called by frame at "); |
| print_address_numeric (get_frame_base (calling_frame_info), |
| 1, gdb_stdout); |
| } |
| if (get_next_frame (fi) && calling_frame_info) |
| puts_filtered (","); |
| wrap_here (" "); |
| if (get_next_frame (fi)) |
| { |
| printf_filtered (" caller of frame at "); |
| print_address_numeric (get_frame_base (get_next_frame (fi)), 1, |
| gdb_stdout); |
| } |
| if (get_next_frame (fi) || calling_frame_info) |
| puts_filtered ("\n"); |
| if (s) |
| printf_filtered (" source language %s.\n", |
| language_str (s->language)); |
| |
| { |
| /* Address of the argument list for this frame, or 0. */ |
| CORE_ADDR arg_list = get_frame_args_address (fi); |
| /* Number of args for this frame, or -1 if unknown. */ |
| int numargs; |
| |
| if (arg_list == 0) |
| printf_filtered (" Arglist at unknown address.\n"); |
| else |
| { |
| printf_filtered (" Arglist at "); |
| print_address_numeric (arg_list, 1, gdb_stdout); |
| printf_filtered (","); |
| |
| if (!FRAME_NUM_ARGS_P ()) |
| { |
| numargs = -1; |
| puts_filtered (" args: "); |
| } |
| else |
| { |
| numargs = FRAME_NUM_ARGS (fi); |
| gdb_assert (numargs >= 0); |
| if (numargs == 0) |
| puts_filtered (" no args."); |
| else if (numargs == 1) |
| puts_filtered (" 1 arg: "); |
| else |
| printf_filtered (" %d args: ", numargs); |
| } |
| print_frame_args (func, fi, numargs, gdb_stdout); |
| puts_filtered ("\n"); |
| } |
| } |
| { |
| /* Address of the local variables for this frame, or 0. */ |
| CORE_ADDR arg_list = get_frame_locals_address (fi); |
| |
| if (arg_list == 0) |
| printf_filtered (" Locals at unknown address,"); |
| else |
| { |
| printf_filtered (" Locals at "); |
| print_address_numeric (arg_list, 1, gdb_stdout); |
| printf_filtered (","); |
| } |
| } |
| |
| if (DEPRECATED_FRAME_INIT_SAVED_REGS_P () |
| && deprecated_get_frame_saved_regs (fi) == NULL) |
| DEPRECATED_FRAME_INIT_SAVED_REGS (fi); |
| /* Print as much information as possible on the location of all the |
| registers. */ |
| { |
| enum lval_type lval; |
| int optimized; |
| CORE_ADDR addr; |
| int realnum; |
| int count; |
| int i; |
| int need_nl = 1; |
| |
| /* The sp is special; what's displayed isn't the save address, but |
| the value of the previous frame's sp. This is a legacy thing, |
| at one stage the frame cached the previous frame's SP instead |
| of its address, hence it was easiest to just display the cached |
| value. */ |
| if (SP_REGNUM >= 0) |
| { |
| /* Find out the location of the saved stack pointer with out |
| actually evaluating it. */ |
| frame_register_unwind (fi, SP_REGNUM, &optimized, &lval, &addr, |
| &realnum, NULL); |
| if (!optimized && lval == not_lval) |
| { |
| char value[MAX_REGISTER_SIZE]; |
| CORE_ADDR sp; |
| frame_register_unwind (fi, SP_REGNUM, &optimized, &lval, &addr, |
| &realnum, value); |
| /* NOTE: cagney/2003-05-22: This is assuming that the |
| stack pointer was packed as an unsigned integer. That |
| may or may not be valid. */ |
| sp = extract_unsigned_integer (value, DEPRECATED_REGISTER_RAW_SIZE (SP_REGNUM)); |
| printf_filtered (" Previous frame's sp is "); |
| print_address_numeric (sp, 1, gdb_stdout); |
| printf_filtered ("\n"); |
| need_nl = 0; |
| } |
| else if (!optimized && lval == lval_memory) |
| { |
| printf_filtered (" Previous frame's sp at "); |
| print_address_numeric (addr, 1, gdb_stdout); |
| printf_filtered ("\n"); |
| need_nl = 0; |
| } |
| else if (!optimized && lval == lval_register) |
| { |
| printf_filtered (" Previous frame's sp in %s\n", |
| REGISTER_NAME (realnum)); |
| need_nl = 0; |
| } |
| /* else keep quiet. */ |
| } |
| |
| count = 0; |
| numregs = NUM_REGS + NUM_PSEUDO_REGS; |
| for (i = 0; i < numregs; i++) |
| if (i != SP_REGNUM |
| && gdbarch_register_reggroup_p (current_gdbarch, i, all_reggroup)) |
| { |
| /* Find out the location of the saved register without |
| fetching the corresponding value. */ |
| frame_register_unwind (fi, i, &optimized, &lval, &addr, &realnum, |
| NULL); |
| /* For moment, only display registers that were saved on the |
| stack. */ |
| if (!optimized && lval == lval_memory) |
| { |
| if (count == 0) |
| puts_filtered (" Saved registers:\n "); |
| else |
| puts_filtered (","); |
| wrap_here (" "); |
| printf_filtered (" %s at ", REGISTER_NAME (i)); |
| print_address_numeric (addr, 1, gdb_stdout); |
| count++; |
| } |
| } |
| if (count || need_nl) |
| puts_filtered ("\n"); |
| } |
| } |
| |
| #if 0 |
| /* Set a limit on the number of frames printed by default in a |
| backtrace. */ |
| |
| static int backtrace_limit; |
| |
| static void |
| set_backtrace_limit_command (char *count_exp, int from_tty) |
| { |
| int count = parse_and_eval_long (count_exp); |
| |
| if (count < 0) |
| error ("Negative argument not meaningful as backtrace limit."); |
| |
| backtrace_limit = count; |
| } |
| |
| static void |
| backtrace_limit_info (char *arg, int from_tty) |
| { |
| if (arg) |
| error ("\"Info backtrace-limit\" takes no arguments."); |
| |
| printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit); |
| } |
| #endif |
| |
| /* Print briefly all stack frames or just the innermost COUNT frames. */ |
| |
| static void backtrace_command_1 (char *count_exp, int show_locals, |
| int from_tty); |
| static void |
| backtrace_command_1 (char *count_exp, int show_locals, int from_tty) |
| { |
| struct frame_info *fi; |
| int count; |
| int i; |
| struct frame_info *trailing; |
| int trailing_level; |
| |
| if (!target_has_stack) |
| error ("No stack."); |
| |
| /* The following code must do two things. First, it must |
| set the variable TRAILING to the frame from which we should start |
| printing. Second, it must set the variable count to the number |
| of frames which we should print, or -1 if all of them. */ |
| trailing = get_current_frame (); |
| |
| /* The target can be in a state where there is no valid frames |
| (e.g., just connected). */ |
| if (trailing == NULL) |
| error ("No stack."); |
| |
| trailing_level = 0; |
| if (count_exp) |
| { |
| count = parse_and_eval_long (count_exp); |
| if (count < 0) |
| { |
| struct frame_info *current; |
| |
| count = -count; |
| |
| current = trailing; |
| while (current && count--) |
| { |
| QUIT; |
| current = get_prev_frame (current); |
| } |
| |
| /* Will stop when CURRENT reaches the top of the stack. TRAILING |
| will be COUNT below it. */ |
| while (current) |
| { |
| QUIT; |
| trailing = get_prev_frame (trailing); |
| current = get_prev_frame (current); |
| trailing_level++; |
| } |
| |
| count = -1; |
| } |
| } |
| else |
| count = -1; |
| |
| if (info_verbose) |
| { |
| struct partial_symtab *ps; |
| |
| /* Read in symbols for all of the frames. Need to do this in |
| a separate pass so that "Reading in symbols for xxx" messages |
| don't screw up the appearance of the backtrace. Also |
| if people have strong opinions against reading symbols for |
| backtrace this may have to be an option. */ |
| i = count; |
| for (fi = trailing; |
| fi != NULL && i--; |
| fi = get_prev_frame (fi)) |
| { |
| QUIT; |
| ps = find_pc_psymtab (get_frame_address_in_block (fi)); |
| if (ps) |
| PSYMTAB_TO_SYMTAB (ps); /* Force syms to come in */ |
| } |
| } |
| |
| for (i = 0, fi = trailing; |
| fi && count--; |
| i++, fi = get_prev_frame (fi)) |
| { |
| QUIT; |
| |
| /* Don't use print_stack_frame; if an error() occurs it probably |
| means further attempts to backtrace would fail (on the other |
| hand, perhaps the code does or could be fixed to make sure |
| the frame->prev field gets set to NULL in that case). */ |
| print_frame_info (fi, trailing_level + i, 0, 1); |
| if (show_locals) |
| print_frame_local_vars (fi, 1, gdb_stdout); |
| } |
| |
| /* If we've stopped before the end, mention that. */ |
| if (fi && from_tty) |
| printf_filtered ("(More stack frames follow...)\n"); |
| } |
| |
| static void |
| backtrace_command (char *arg, int from_tty) |
| { |
| struct cleanup *old_chain = (struct cleanup *) NULL; |
| char **argv = (char **) NULL; |
| int argIndicatingFullTrace = (-1), totArgLen = 0, argc = 0; |
| char *argPtr = arg; |
| |
| if (arg != (char *) NULL) |
| { |
| int i; |
| |
| argv = buildargv (arg); |
| old_chain = make_cleanup_freeargv (argv); |
| argc = 0; |
| for (i = 0; (argv[i] != (char *) NULL); i++) |
| { |
| unsigned int j; |
| |
| for (j = 0; (j < strlen (argv[i])); j++) |
| argv[i][j] = tolower (argv[i][j]); |
| |
| if (argIndicatingFullTrace < 0 && subset_compare (argv[i], "full")) |
| argIndicatingFullTrace = argc; |
| else |
| { |
| argc++; |
| totArgLen += strlen (argv[i]); |
| } |
| } |
| totArgLen += argc; |
| if (argIndicatingFullTrace >= 0) |
| { |
| if (totArgLen > 0) |
| { |
| argPtr = (char *) xmalloc (totArgLen + 1); |
| if (!argPtr) |
| nomem (0); |
| else |
| { |
| memset (argPtr, 0, totArgLen + 1); |
| for (i = 0; (i < (argc + 1)); i++) |
| { |
| if (i != argIndicatingFullTrace) |
| { |
| strcat (argPtr, argv[i]); |
| strcat (argPtr, " "); |
| } |
| } |
| } |
| } |
| else |
| argPtr = (char *) NULL; |
| } |
| } |
| |
| backtrace_command_1 (argPtr, (argIndicatingFullTrace >= 0), from_tty); |
| |
| if (argIndicatingFullTrace >= 0 && totArgLen > 0) |
| xfree (argPtr); |
| |
| if (old_chain) |
| do_cleanups (old_chain); |
| } |
| |
| static void backtrace_full_command (char *arg, int from_tty); |
| static void |
| backtrace_full_command (char *arg, int from_tty) |
| { |
| backtrace_command_1 (arg, 1, from_tty); |
| } |
| |
| |
| /* Print the local variables of a block B active in FRAME. |
| Return 1 if any variables were printed; 0 otherwise. */ |
| |
| static int |
| print_block_frame_locals (struct block *b, struct frame_info *fi, |
| int num_tabs, struct ui_file *stream) |
| { |
| struct dict_iterator iter; |
| int j; |
| struct symbol *sym; |
| int values_printed = 0; |
| |
| ALL_BLOCK_SYMBOLS (b, iter, sym) |
| { |
| switch (SYMBOL_CLASS (sym)) |
| { |
| case LOC_LOCAL: |
| case LOC_REGISTER: |
| case LOC_STATIC: |
| case LOC_BASEREG: |
| case LOC_COMPUTED: |
| values_printed = 1; |
| for (j = 0; j < num_tabs; j++) |
| fputs_filtered ("\t", stream); |
| fputs_filtered (SYMBOL_PRINT_NAME (sym), stream); |
| fputs_filtered (" = ", stream); |
| print_variable_value (sym, fi, stream); |
| fprintf_filtered (stream, "\n"); |
| break; |
| |
| default: |
| /* Ignore symbols which are not locals. */ |
| break; |
| } |
| } |
| return values_printed; |
| } |
| |
| /* Same, but print labels. */ |
| |
| static int |
| print_block_frame_labels (struct block *b, int *have_default, |
| struct ui_file *stream) |
| { |
| struct dict_iterator iter; |
| struct symbol *sym; |
| int values_printed = 0; |
| |
| ALL_BLOCK_SYMBOLS (b, iter, sym) |
| { |
| if (DEPRECATED_STREQ (DEPRECATED_SYMBOL_NAME (sym), "default")) |
| { |
| if (*have_default) |
| continue; |
| *have_default = 1; |
| } |
| if (SYMBOL_CLASS (sym) == LOC_LABEL) |
| { |
| struct symtab_and_line sal; |
| sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); |
| values_printed = 1; |
| fputs_filtered (SYMBOL_PRINT_NAME (sym), stream); |
| if (addressprint) |
| { |
| fprintf_filtered (stream, " "); |
| print_address_numeric (SYMBOL_VALUE_ADDRESS (sym), 1, stream); |
| } |
| fprintf_filtered (stream, " in file %s, line %d\n", |
| sal.symtab->filename, sal.line); |
| } |
| } |
| return values_printed; |
| } |
| |
| /* Print on STREAM all the local variables in frame FRAME, |
| including all the blocks active in that frame |
| at its current pc. |
| |
| Returns 1 if the job was done, |
| or 0 if nothing was printed because we have no info |
| on the function running in FRAME. */ |
| |
| static void |
| print_frame_local_vars (struct frame_info *fi, int num_tabs, |
| struct ui_file *stream) |
| { |
| struct block *block = get_frame_block (fi, 0); |
| int values_printed = 0; |
| |
| if (block == 0) |
| { |
| fprintf_filtered (stream, "No symbol table info available.\n"); |
| return; |
| } |
| |
| while (block != 0) |
| { |
| if (print_block_frame_locals (block, fi, num_tabs, stream)) |
| values_printed = 1; |
| /* 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 (!values_printed) |
| { |
| fprintf_filtered (stream, "No locals.\n"); |
| } |
| } |
| |
| /* Same, but print labels. */ |
| |
| static void |
| print_frame_label_vars (struct frame_info *fi, int this_level_only, |
| struct ui_file *stream) |
| { |
| struct blockvector *bl; |
| struct block *block = get_frame_block (fi, 0); |
| int values_printed = 0; |
| int index, have_default = 0; |
| char *blocks_printed; |
| CORE_ADDR pc = get_frame_pc (fi); |
| |
| if (block == 0) |
| { |
| fprintf_filtered (stream, "No symbol table info available.\n"); |
| return; |
| } |
| |
| bl = blockvector_for_pc (BLOCK_END (block) - 4, &index); |
| blocks_printed = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
| memset (blocks_printed, 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_printed[index] == 0) |
| { |
| if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl, index), &have_default, stream)) |
| values_printed = 1; |
| blocks_printed[index] = 1; |
| } |
| index++; |
| } |
| if (have_default) |
| return; |
| if (values_printed && this_level_only) |
| return; |
| |
| /* 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 (!values_printed && !this_level_only) |
| { |
| fprintf_filtered (stream, "No catches.\n"); |
| } |
| } |
| |
| void |
| locals_info (char *args, int from_tty) |
| { |
| if (!deprecated_selected_frame) |
| error ("No frame selected."); |
| print_frame_local_vars (deprecated_selected_frame, 0, gdb_stdout); |
| } |
| |
| static void |
| catch_info (char *ignore, int from_tty) |
| { |
| struct symtab_and_line *sal; |
| |
| /* Check for target support for exception handling */ |
| sal = target_enable_exception_callback (EX_EVENT_CATCH, 1); |
| if (sal) |
| { |
| /* Currently not handling this */ |
| /* Ideally, here we should interact with the C++ runtime |
| system to find the list of active handlers, etc. */ |
| fprintf_filtered (gdb_stdout, "Info catch not supported with this target/compiler combination.\n"); |
| #if 0 |
| if (!deprecated_selected_frame) |
| error ("No frame selected."); |
| #endif |
| } |
| else |
| { |
| /* Assume g++ compiled code -- old v 4.16 behaviour */ |
| if (!deprecated_selected_frame) |
| error ("No frame selected."); |
| |
| print_frame_label_vars (deprecated_selected_frame, 0, gdb_stdout); |
| } |
| } |
| |
| static void |
| print_frame_arg_vars (struct frame_info *fi, |
| struct ui_file *stream) |
| { |
| struct symbol *func = get_frame_function (fi); |
| struct block *b; |
| struct dict_iterator iter; |
| struct symbol *sym, *sym2; |
| int values_printed = 0; |
| |
| if (func == 0) |
| { |
| fprintf_filtered (stream, "No symbol table info available.\n"); |
| return; |
| } |
| |
| b = SYMBOL_BLOCK_VALUE (func); |
| ALL_BLOCK_SYMBOLS (b, iter, sym) |
| { |
| switch (SYMBOL_CLASS (sym)) |
| { |
| case LOC_ARG: |
| case LOC_LOCAL_ARG: |
| case LOC_REF_ARG: |
| case LOC_REGPARM: |
| case LOC_REGPARM_ADDR: |
| case LOC_BASEREG_ARG: |
| case LOC_COMPUTED_ARG: |
| values_printed = 1; |
| fputs_filtered (SYMBOL_PRINT_NAME (sym), stream); |
| fputs_filtered (" = ", stream); |
| |
| /* We have to look up the symbol because arguments can have |
| two entries (one a parameter, one a local) and the one we |
| want is the local, which lookup_symbol will find for us. |
| This includes gcc1 (not gcc2) on the sparc when passing a |
| small structure and gcc2 when the argument type is float |
| and it is passed as a double and converted to float by |
| the prologue (in the latter case the type of the LOC_ARG |
| symbol is double and the type of the LOC_LOCAL symbol is |
| float). There are also LOC_ARG/LOC_REGISTER pairs which |
| are not combined in symbol-reading. */ |
| |
| sym2 = lookup_symbol (DEPRECATED_SYMBOL_NAME (sym), |
| b, VAR_DOMAIN, (int *) NULL, (struct symtab **) NULL); |
| print_variable_value (sym2, fi, stream); |
| fprintf_filtered (stream, "\n"); |
| break; |
| |
| default: |
| /* Don't worry about things which aren't arguments. */ |
| break; |
| } |
| } |
| if (!values_printed) |
| { |
| fprintf_filtered (stream, "No arguments.\n"); |
| } |
| } |
| |
| void |
| args_info (char *ignore, int from_tty) |
| { |
| if (!deprecated_selected_frame) |
| error ("No frame selected."); |
| print_frame_arg_vars (deprecated_selected_frame, gdb_stdout); |
| } |
| |
| |
| static void |
| args_plus_locals_info (char *ignore, int from_tty) |
| { |
| args_info (ignore, from_tty); |
| locals_info (ignore, from_tty); |
| } |
| |
| |
| /* Select frame FI. Also print the stack frame and show the source if |
| this is the tui version. */ |
| static void |
| select_and_print_frame (struct frame_info *fi) |
| { |
| select_frame (fi); |
| if (fi) |
| { |
| print_stack_frame (fi, frame_relative_level (fi), 1); |
| } |
| } |
| |
| /* Return the symbol-block in which the selected frame is executing. |
| Can return zero under various legitimate circumstances. |
| |
| If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant |
| code address within the block returned. We use this to decide |
| which macros are in scope. */ |
| |
| struct block * |
| get_selected_block (CORE_ADDR *addr_in_block) |
| { |
| if (!target_has_stack) |
| return 0; |
| |
| /* NOTE: cagney/2002-11-28: Why go to all this effort to not create |
| a selected/current frame? Perhaphs this function is called, |
| indirectly, by WFI in "infrun.c" where avoiding the creation of |
| an inner most frame is very important (it slows down single |
| step). I suspect, though that this was true in the deep dark |
| past but is no longer the case. A mindless look at all the |
| callers tends to support this theory. I think we should be able |
| to assume that there is always a selcted frame. */ |
| /* gdb_assert (deprecated_selected_frame != NULL); So, do you feel |
| lucky? */ |
| if (!deprecated_selected_frame) |
| { |
| CORE_ADDR pc = read_pc (); |
| if (addr_in_block != NULL) |
| *addr_in_block = pc; |
| return block_for_pc (pc); |
| } |
| return get_frame_block (deprecated_selected_frame, addr_in_block); |
| } |
| |
| /* Find a frame a certain number of levels away from FRAME. |
| LEVEL_OFFSET_PTR points to an int containing the number of levels. |
| Positive means go to earlier frames (up); negative, the reverse. |
| The int that contains the number of levels is counted toward |
| zero as the frames for those levels are found. |
| If the top or bottom frame is reached, that frame is returned, |
| but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates |
| how much farther the original request asked to go. */ |
| |
| struct frame_info * |
| find_relative_frame (struct frame_info *frame, |
| int *level_offset_ptr) |
| { |
| struct frame_info *prev; |
| struct frame_info *frame1; |
| |
| /* Going up is simple: just do get_prev_frame enough times |
| or until initial frame is reached. */ |
| while (*level_offset_ptr > 0) |
| { |
| prev = get_prev_frame (frame); |
| if (prev == 0) |
| break; |
| (*level_offset_ptr)--; |
| frame = prev; |
| } |
| /* Going down is just as simple. */ |
| if (*level_offset_ptr < 0) |
| { |
| while (*level_offset_ptr < 0) |
| { |
| frame1 = get_next_frame (frame); |
| if (!frame1) |
| break; |
| frame = frame1; |
| (*level_offset_ptr)++; |
| } |
| } |
| return frame; |
| } |
| |
| /* The "select_frame" command. With no arg, NOP. |
| With arg LEVEL_EXP, select the frame at level LEVEL if it is a |
| valid level. Otherwise, treat level_exp as an address expression |
| and select it. See parse_frame_specification for more info on proper |
| frame expressions. */ |
| |
| void |
| select_frame_command (char *level_exp, int from_tty) |
| { |
| struct frame_info *frame; |
| int level = frame_relative_level (deprecated_selected_frame); |
| |
| if (!target_has_stack) |
| error ("No stack."); |
| |
| frame = parse_frame_specification (level_exp); |
| |
| select_frame (frame); |
| if (level != frame_relative_level (deprecated_selected_frame)) |
| selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame)); |
| } |
| |
| /* The "frame" command. With no arg, print selected frame briefly. |
| With arg, behaves like select_frame and then prints the selected |
| frame. */ |
| |
| void |
| frame_command (char *level_exp, int from_tty) |
| { |
| select_frame_command (level_exp, from_tty); |
| print_stack_frame (deprecated_selected_frame, |
| frame_relative_level (deprecated_selected_frame), 1); |
| } |
| |
| /* The XDB Compatibility command to print the current frame. */ |
| |
| static void |
| current_frame_command (char *level_exp, int from_tty) |
| { |
| if (target_has_stack == 0 || deprecated_selected_frame == 0) |
| error ("No stack."); |
| print_stack_frame (deprecated_selected_frame, |
| frame_relative_level (deprecated_selected_frame), 1); |
| } |
| |
| /* Select the frame up one or COUNT stack levels |
| from the previously selected frame, and print it briefly. */ |
| |
| static void |
| up_silently_base (char *count_exp) |
| { |
| struct frame_info *fi; |
| int count = 1, count1; |
| if (count_exp) |
| count = parse_and_eval_long (count_exp); |
| count1 = count; |
| |
| if (target_has_stack == 0 || deprecated_selected_frame == 0) |
| error ("No stack."); |
| |
| fi = find_relative_frame (deprecated_selected_frame, &count1); |
| if (count1 != 0 && count_exp == 0) |
| error ("Initial frame selected; you cannot go up."); |
| select_frame (fi); |
| selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame)); |
| } |
| |
| static void |
| up_silently_command (char *count_exp, int from_tty) |
| { |
| up_silently_base (count_exp); |
| } |
| |
| static void |
| up_command (char *count_exp, int from_tty) |
| { |
| up_silently_base (count_exp); |
| print_stack_frame (deprecated_selected_frame, |
| frame_relative_level (deprecated_selected_frame), 1); |
| } |
| |
| /* Select the frame down one or COUNT stack levels |
| from the previously selected frame, and print it briefly. */ |
| |
| static void |
| down_silently_base (char *count_exp) |
| { |
| struct frame_info *frame; |
| int count = -1, count1; |
| if (count_exp) |
| count = -parse_and_eval_long (count_exp); |
| count1 = count; |
| |
| if (target_has_stack == 0 || deprecated_selected_frame == 0) |
| error ("No stack."); |
| |
| frame = find_relative_frame (deprecated_selected_frame, &count1); |
| if (count1 != 0 && count_exp == 0) |
| { |
| |
| /* We only do this if count_exp is not specified. That way "down" |
| means to really go down (and let me know if that is |
| impossible), but "down 9999" can be used to mean go all the way |
| down without getting an error. */ |
| |
| error ("Bottom (i.e., innermost) frame selected; you cannot go down."); |
| } |
| |
| select_frame (frame); |
| selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame)); |
| } |
| |
| static void |
| down_silently_command (char *count_exp, int from_tty) |
| { |
| down_silently_base (count_exp); |
| } |
| |
| static void |
| down_command (char *count_exp, int from_tty) |
| { |
| down_silently_base (count_exp); |
| print_stack_frame (deprecated_selected_frame, |
| frame_relative_level (deprecated_selected_frame), 1); |
| } |
| |
| void |
| return_command (char *retval_exp, int from_tty) |
| { |
| struct symbol *thisfun; |
| struct value *return_value = NULL; |
| const char *query_prefix = ""; |
| |
| /* FIXME: cagney/2003-10-20: Perform a minimal existance test on the |
| target. If that fails, error out. For the moment don't rely on |
| get_selected_frame as it's error message is the the singularly |
| obscure "No registers". */ |
| if (!target_has_registers) |
| error ("No selected frame."); |
| thisfun = get_frame_function (get_selected_frame ()); |
| |
| /* Compute the return value. If the computation triggers an error, |
| let it bail. If the return type can't be handled, set |
| RETURN_VALUE to NULL, and QUERY_PREFIX to an informational |
| message. */ |
| if (retval_exp) |
| { |
| struct type *return_type = NULL; |
| |
| /* Compute the return value. Should the computation fail, this |
| call throws an error. */ |
| return_value = parse_and_eval (retval_exp); |
| |
| /* Cast return value to the return type of the function. Should |
| the cast fail, this call throws an error. */ |
| if (thisfun != NULL) |
| return_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun)); |
| if (return_type == NULL) |
| return_type = builtin_type_int; |
| return_value = value_cast (return_type, return_value); |
| |
| /* Make sure the value is fully evaluated. It may live in the |
| stack frame we're about to pop. */ |
| if (VALUE_LAZY (return_value)) |
| value_fetch_lazy (return_value); |
| |
| if (TYPE_CODE (return_type) == TYPE_CODE_VOID) |
| /* If the return-type is "void", don't try to find the |
| return-value's location. However, do still evaluate the |
| return expression so that, even when the expression result |
| is discarded, side effects such as "return i++" still |
| occure. */ |
| return_value = NULL; |
| else if (!gdbarch_return_value_p (current_gdbarch) |
| && (TYPE_CODE (return_type) == TYPE_CODE_STRUCT |
| || TYPE_CODE (return_type) == TYPE_CODE_UNION)) |
| { |
| /* NOTE: cagney/2003-10-20: Compatibility hack for legacy |
| code. Old architectures don't expect STORE_RETURN_VALUE |
| to be called with with a small struct that needs to be |
| stored in registers. Don't start doing it now. */ |
| query_prefix = "\ |
| A structure or union return type is not supported by this architecture.\n\ |
| If you continue, the return value that you specified will be ignored.\n"; |
| return_value = NULL; |
| } |
| else if (using_struct_return (return_type, 0)) |
| { |
| query_prefix = "\ |
| The location at which to store the function's return value is unknown.\n\ |
| If you continue, the return value that you specified will be ignored.\n"; |
| return_value = NULL; |
| } |
| } |
| |
| /* Does an interactive user really want to do this? Include |
| information, such as how well GDB can handle the return value, in |
| the query message. */ |
| if (from_tty) |
| { |
| int confirmed; |
| if (thisfun == NULL) |
| confirmed = query ("%sMake selected stack frame return now? ", |
| query_prefix); |
| else |
| confirmed = query ("%sMake %s return now? ", query_prefix, |
| SYMBOL_PRINT_NAME (thisfun)); |
| if (!confirmed) |
| error ("Not confirmed"); |
| } |
| |
| /* NOTE: cagney/2003-01-18: Is this silly? Rather than pop each |
| frame in turn, should this code just go straight to the relevant |
| frame and pop that? */ |
| |
| /* First discard all frames inner-to the selected frame (making the |
| selected frame current). */ |
| { |
| struct frame_id selected_id = get_frame_id (get_selected_frame ()); |
| while (!frame_id_eq (selected_id, get_frame_id (get_current_frame ()))) |
| { |
| if (frame_id_inner (selected_id, get_frame_id (get_current_frame ()))) |
| /* Caught in the safety net, oops! We've gone way past the |
| selected frame. */ |
| error ("Problem while popping stack frames (corrupt stack?)"); |
| frame_pop (get_current_frame ()); |
| } |
| } |
| |
| /* Second discard the selected frame (which is now also the current |
| frame). */ |
| frame_pop (get_current_frame ()); |
| |
| /* Store RETURN_VAUE in the just-returned register set. */ |
| if (return_value != NULL) |
| { |
| struct type *return_type = VALUE_TYPE (return_value); |
| if (!gdbarch_return_value_p (current_gdbarch)) |
| { |
| STORE_RETURN_VALUE (return_type, current_regcache, |
| VALUE_CONTENTS (return_value)); |
| } |
| else |
| { |
| gdb_assert (gdbarch_return_value (current_gdbarch, return_type, |
| NULL, NULL, NULL) |
| == RETURN_VALUE_REGISTER_CONVENTION); |
| gdbarch_return_value (current_gdbarch, return_type, |
| current_regcache, NULL /*read*/, |
| VALUE_CONTENTS (return_value) /*write*/); |
| } |
| } |
| |
| /* If we are at the end of a call dummy now, pop the dummy frame |
| too. */ |
| /* NOTE: cagney/2003-01-18: Is this silly? Instead of popping all |
| the frames in sequence, should this code just pop the dummy frame |
| directly? */ |
| #ifdef DEPRECATED_CALL_DUMMY_HAS_COMPLETED |
| /* Since all up-to-date architectures return direct to the dummy |
| breakpoint address, a dummy frame has, by definition, always |
| completed. Hence this method is no longer needed. */ |
| if (DEPRECATED_CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (), |
| get_frame_base (get_current_frame ()))) |
| frame_pop (get_current_frame ()); |
| #else |
| if (get_frame_type (get_current_frame ()) == DUMMY_FRAME) |
| frame_pop (get_current_frame ()); |
| #endif |
| |
| /* If interactive, print the frame that is now current. */ |
| if (from_tty) |
| frame_command ("0", 1); |
| else |
| select_frame_command ("0", 0); |
| } |
| |
| /* Sets the scope to input function name, provided that the |
| function is within the current stack frame */ |
| |
| struct function_bounds |
| { |
| CORE_ADDR low, high; |
| }; |
| |
| static void func_command (char *arg, int from_tty); |
| static void |
| func_command (char *arg, int from_tty) |
| { |
| struct frame_info *fp; |
| int found = 0; |
| struct symtabs_and_lines sals; |
| int i; |
| int level = 1; |
| struct function_bounds *func_bounds = (struct function_bounds *) NULL; |
| |
| if (arg != (char *) NULL) |
| return; |
| |
| fp = parse_frame_specification ("0"); |
| sals = decode_line_spec (arg, 1); |
| func_bounds = (struct function_bounds *) xmalloc ( |
| sizeof (struct function_bounds) * sals.nelts); |
| for (i = 0; (i < sals.nelts && !found); i++) |
| { |
| if (sals.sals[i].pc == (CORE_ADDR) 0 || |
| find_pc_partial_function (sals.sals[i].pc, |
| (char **) NULL, |
| &func_bounds[i].low, |
| &func_bounds[i].high) == 0) |
| { |
| func_bounds[i].low = |
| func_bounds[i].high = (CORE_ADDR) NULL; |
| } |
| } |
| |
| do |
| { |
| for (i = 0; (i < sals.nelts && !found); i++) |
| found = (get_frame_pc (fp) >= func_bounds[i].low && |
| get_frame_pc (fp) < func_bounds[i].high); |
| if (!found) |
| { |
| level = 1; |
| fp = find_relative_frame (fp, &level); |
| } |
| } |
| while (!found && level == 0); |
| |
| if (func_bounds) |
| xfree (func_bounds); |
| |
| if (!found) |
| printf_filtered ("'%s' not within current stack frame.\n", arg); |
| else if (fp != deprecated_selected_frame) |
| select_and_print_frame (fp); |
| } |
| |
| /* Gets the language of the current frame. */ |
| |
| enum language |
| get_frame_language (void) |
| { |
| struct symtab *s; |
| enum language flang; /* The language of the current frame */ |
| |
| if (deprecated_selected_frame) |
| { |
| /* We determine the current frame language by looking up its |
| associated symtab. To retrieve this symtab, we use the frame PC. |
| However we cannot use the frame pc as is, because it usually points |
| to the instruction following the "call", which is sometimes the first |
| instruction of another function. So we rely on |
| get_frame_address_in_block(), it provides us with a PC which is |
| guaranteed to be inside the frame's code block. */ |
| s = find_pc_symtab (get_frame_address_in_block (deprecated_selected_frame)); |
| if (s) |
| flang = s->language; |
| else |
| flang = language_unknown; |
| } |
| else |
| flang = language_unknown; |
| |
| return flang; |
| } |
| |
| void |
| _initialize_stack (void) |
| { |
| #if 0 |
| backtrace_limit = 30; |
| #endif |
| |
| add_com ("return", class_stack, return_command, |
| "Make selected stack frame return to its caller.\n\ |
| Control remains in the debugger, but when you continue\n\ |
| execution will resume in the frame above the one now selected.\n\ |
| If an argument is given, it is an expression for the value to return."); |
| |
| add_com ("up", class_stack, up_command, |
| "Select and print stack frame that called this one.\n\ |
| An argument says how many frames up to go."); |
| add_com ("up-silently", class_support, up_silently_command, |
| "Same as the `up' command, but does not print anything.\n\ |
| This is useful in command scripts."); |
| |
| add_com ("down", class_stack, down_command, |
| "Select and print stack frame called by this one.\n\ |
| An argument says how many frames down to go."); |
| add_com_alias ("do", "down", class_stack, 1); |
| add_com_alias ("dow", "down", class_stack, 1); |
| add_com ("down-silently", class_support, down_silently_command, |
| "Same as the `down' command, but does not print anything.\n\ |
| This is useful in command scripts."); |
| |
| add_com ("frame", class_stack, frame_command, |
| "Select and print a stack frame.\n\ |
| With no argument, print the selected stack frame. (See also \"info frame\").\n\ |
| An argument specifies the frame to select.\n\ |
| It can be a stack frame number or the address of the frame.\n\ |
| With argument, nothing is printed if input is coming from\n\ |
| a command file or a user-defined command."); |
| |
| add_com_alias ("f", "frame", class_stack, 1); |
| |
| if (xdb_commands) |
| { |
| add_com ("L", class_stack, current_frame_command, |
| "Print the current stack frame.\n"); |
| add_com_alias ("V", "frame", class_stack, 1); |
| } |
| add_com ("select-frame", class_stack, select_frame_command, |
| "Select a stack frame without printing anything.\n\ |
| An argument specifies the frame to select.\n\ |
| It can be a stack frame number or the address of the frame.\n"); |
| |
| add_com ("backtrace", class_stack, backtrace_command, |
| "Print backtrace of all stack frames, or innermost COUNT frames.\n\ |
| With a negative argument, print outermost -COUNT frames.\n\ |
| Use of the 'full' qualifier also prints the values of the local variables.\n"); |
| add_com_alias ("bt", "backtrace", class_stack, 0); |
| if (xdb_commands) |
| { |
| add_com_alias ("t", "backtrace", class_stack, 0); |
| add_com ("T", class_stack, backtrace_full_command, |
| "Print backtrace of all stack frames, or innermost COUNT frames \n\ |
| and the values of the local variables.\n\ |
| With a negative argument, print outermost -COUNT frames.\n\ |
| Usage: T <count>\n"); |
| } |
| |
| add_com_alias ("where", "backtrace", class_alias, 0); |
| add_info ("stack", backtrace_command, |
| "Backtrace of the stack, or innermost COUNT frames."); |
| add_info_alias ("s", "stack", 1); |
| add_info ("frame", frame_info, |
| "All about selected stack frame, or frame at ADDR."); |
| add_info_alias ("f", "frame", 1); |
| add_info ("locals", locals_info, |
| "Local variables of current stack frame."); |
| add_info ("args", args_info, |
| "Argument variables of current stack frame."); |
| if (xdb_commands) |
| add_com ("l", class_info, args_plus_locals_info, |
| "Argument and local variables of current stack frame."); |
| |
| if (dbx_commands) |
| add_com ("func", class_stack, func_command, |
| "Select the stack frame that contains <func>.\nUsage: func <name>\n"); |
| |
| add_info ("catch", catch_info, |
| "Exceptions that can be caught in the current stack frame."); |
| |
| #if 0 |
| add_cmd ("backtrace-limit", class_stack, set_backtrace_limit_command, |
| "Specify maximum number of frames for \"backtrace\" to print by default.", |
| &setlist); |
| add_info ("backtrace-limit", backtrace_limit_info, |
| "The maximum number of frames for \"backtrace\" to print by default."); |
| #endif |
| } |