| /* Print and select stack frames for GDB, the GNU debugger. |
| Copyright 1986, 87, 89, 91, 92, 93, 94, 95, 96, 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 <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 "breakpoint.h" |
| #include "demangle.h" |
| #include "inferior.h" |
| #include "annotate.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| |
| /* Prototypes for exported functions. */ |
| |
| void args_info PARAMS ((char *, int)); |
| |
| void locals_info PARAMS ((char *, int)); |
| |
| void (*selected_frame_level_changed_hook) PARAMS ((int)); |
| |
| void _initialize_stack PARAMS ((void)); |
| |
| /* Prototypes for local functions. */ |
| |
| static void return_command PARAMS ((char *, int)); |
| |
| static void down_command PARAMS ((char *, int)); |
| |
| static void down_silently_base PARAMS ((char *)); |
| |
| static void down_silently_command PARAMS ((char *, int)); |
| |
| static void up_command PARAMS ((char *, int)); |
| |
| static void up_silently_base PARAMS ((char *)); |
| |
| static void up_silently_command PARAMS ((char *, int)); |
| |
| void frame_command PARAMS ((char *, int)); |
| |
| static void current_frame_command PARAMS ((char *, int)); |
| |
| static void select_frame_command PARAMS ((char *, int)); |
| |
| static void print_frame_arg_vars PARAMS ((struct frame_info *, GDB_FILE *)); |
| |
| static void catch_info PARAMS ((char *, int)); |
| |
| static void args_plus_locals_info PARAMS ((char *, int)); |
| |
| static void print_frame_label_vars PARAMS ((struct frame_info *, |
| int, |
| GDB_FILE *)); |
| |
| static void print_frame_local_vars PARAMS ((struct frame_info *, |
| int, |
| GDB_FILE *)); |
| |
| static int print_block_frame_labels PARAMS ((struct block *, int *, |
| GDB_FILE *)); |
| |
| static int print_block_frame_locals PARAMS ((struct block *, |
| struct frame_info *, |
| int, |
| GDB_FILE *)); |
| |
| static void print_frame_info_base PARAMS ((struct frame_info *, int, int, int)); |
| |
| static void print_stack_frame_base PARAMS ((struct frame_info *, int, int)); |
| |
| static void backtrace_command PARAMS ((char *, int)); |
| |
| struct frame_info *parse_frame_specification PARAMS ((char *)); |
| |
| static void frame_info PARAMS ((char *, int)); |
| |
| extern int addressprint; /* Print addresses, or stay symbolic only? */ |
| extern int info_verbose; /* Verbosity of symbol reading msgs */ |
| extern int lines_to_list; /* # of lines "list" command shows by default */ |
| |
| /* The "selected" stack frame is used by default for local and arg access. |
| May be zero, for no selected frame. */ |
| |
| struct frame_info *selected_frame; |
| |
| /* Level of the selected frame: |
| 0 for innermost, 1 for its caller, ... |
| or -1 for frame specified by address with no defined level. */ |
| |
| int selected_frame_level; |
| |
| /* 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; |
| }; |
| |
| static int print_stack_frame_base_stub PARAMS ((char *)); |
| |
| /* Show and print the frame arguments. |
| Pass the args the way catch_errors wants them. */ |
| static int show_and_print_stack_frame_stub PARAMS ((void *args)); |
| static int |
| show_and_print_stack_frame_stub (args) |
| void *args; |
| { |
| struct print_stack_frame_args *p = (struct print_stack_frame_args *) args; |
| |
| /* Reversed order of these so tuiDo() doesn't occur |
| * in the middle of "Breakpoint 1 ... [location]" printing = RT |
| */ |
| if (tui_version) |
| print_frame_info_base (p->fi, p->level, p->source, p->args); |
| print_frame_info (p->fi, p->level, p->source, p->args); |
| |
| return 0; |
| } |
| |
| /* Show or print the frame arguments. |
| Pass the args the way catch_errors wants them. */ |
| static int print_stack_frame_stub PARAMS ((void *args)); |
| static int |
| print_stack_frame_stub (args) |
| void *args; |
| { |
| struct print_stack_frame_args *p = (struct print_stack_frame_args *) args; |
| |
| if (tui_version) |
| print_frame_info (p->fi, p->level, p->source, p->args); |
| else |
| print_frame_info_base (p->fi, p->level, p->source, p->args); |
| return 0; |
| } |
| |
| /* 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). */ |
| |
| /* Pass the args the way catch_errors wants them. */ |
| static int |
| print_stack_frame_base_stub (args) |
| char *args; |
| { |
| struct print_stack_frame_args *p = (struct print_stack_frame_args *) args; |
| |
| print_frame_info_base (p->fi, p->level, p->source, p->args); |
| return 0; |
| } |
| |
| /* print the frame arguments to the terminal. |
| Pass the args the way catch_errors wants them. */ |
| static int print_only_stack_frame_stub PARAMS ((void *)); |
| static int |
| print_only_stack_frame_stub (args) |
| void *args; |
| { |
| struct print_stack_frame_args *p = (struct print_stack_frame_args *) args; |
| |
| print_frame_info_base (p->fi, p->level, p->source, p->args); |
| return 0; |
| } |
| |
| /* 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. */ |
| |
| static void |
| print_stack_frame_base (fi, level, source) |
| 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, &args, "", RETURN_MASK_ALL); |
| } |
| |
| /* Show and 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 |
| show_and_print_stack_frame (fi, level, source) |
| 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 (show_and_print_stack_frame_stub, &args, "", RETURN_MASK_ALL); |
| } |
| |
| |
| /* 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 (fi, level, source) |
| 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); |
| } |
| |
| /* 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_only_stack_frame (fi, level, source) |
| 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_only_stack_frame_stub, &args, "", RETURN_MASK_ALL); |
| } |
| |
| struct print_args_args |
| { |
| struct symbol *func; |
| struct frame_info *fi; |
| GDB_FILE *stream; |
| }; |
| |
| static int print_args_stub PARAMS ((PTR)); |
| |
| /* Pass the args the way catch_errors wants them. */ |
| |
| static int |
| print_args_stub (args) |
| PTR args; |
| { |
| int numargs; |
| struct print_args_args *p = (struct print_args_args *) args; |
| |
| numargs = FRAME_NUM_ARGS (p->fi); |
| 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: |
| * -1: Print only source line |
| * 0: Print only location |
| * 1: Print location and source line |
| */ |
| |
| static void |
| print_frame_info_base (fi, level, source, args) |
| struct frame_info *fi; |
| int level; |
| int source; |
| int args; |
| { |
| struct symtab_and_line sal; |
| struct symbol *func; |
| register char *funname = 0; |
| enum language funlang = language_unknown; |
| |
| #if 0 |
| char buf[MAX_REGISTER_RAW_SIZE]; |
| CORE_ADDR sp; |
| |
| /* On the 68k, this spends too much time in m68k_find_saved_regs. */ |
| |
| /* Get the value of SP_REGNUM relative to the frame. */ |
| get_saved_register (buf, (int *) NULL, (CORE_ADDR *) NULL, |
| FRAME_INFO_ID (fi), SP_REGNUM, (enum lval_type *) NULL); |
| sp = extract_address (buf, REGISTER_RAW_SIZE (SP_REGNUM)); |
| |
| /* This is not a perfect test, because if a function alloca's some |
| memory, puts some code there, and then jumps into it, then the test |
| will succeed even though there is no call dummy. Probably best is |
| to check for a bp_call_dummy breakpoint. */ |
| if (PC_IN_CALL_DUMMY (fi->pc, sp, fi->frame)) |
| #else |
| if (frame_in_dummy (fi)) |
| #endif |
| { |
| annotate_frame_begin (level == -1 ? 0 : level, fi->pc); |
| |
| /* Do this regardless of SOURCE because we don't have any source |
| to list for this frame. */ |
| if (level >= 0) |
| printf_filtered ("#%-2d ", level); |
| annotate_function_call (); |
| printf_filtered ("<function called from gdb>\n"); |
| annotate_frame_end (); |
| return; |
| } |
| if (fi->signal_handler_caller) |
| { |
| annotate_frame_begin (level == -1 ? 0 : level, fi->pc); |
| |
| /* Do this regardless of SOURCE because we don't have any source |
| to list for this frame. */ |
| if (level >= 0) |
| printf_filtered ("#%-2d ", level); |
| annotate_signal_handler_caller (); |
| printf_filtered ("<signal handler called>\n"); |
| annotate_frame_end (); |
| 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 signal_handler_caller 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. */ |
| sal = |
| find_pc_line (fi->pc, |
| fi->next != NULL |
| && !fi->next->signal_handler_caller |
| && !frame_in_dummy (fi->next)); |
| |
| func = find_pc_function (fi->pc); |
| 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 (fi->pc); |
| 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 = SYMBOL_NAME (msymbol); |
| funlang = SYMBOL_LANGUAGE (msymbol); |
| } |
| else |
| { |
| /* I'd like to use SYMBOL_SOURCE_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 = 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_SOURCE_NAME (func); |
| } |
| } |
| } |
| else |
| { |
| struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc); |
| if (msymbol != NULL) |
| { |
| funname = SYMBOL_NAME (msymbol); |
| funlang = SYMBOL_LANGUAGE (msymbol); |
| } |
| } |
| |
| if (source >= 0 || !sal.symtab) |
| { |
| annotate_frame_begin (level == -1 ? 0 : level, fi->pc); |
| |
| if (level >= 0) |
| printf_filtered ("#%-2d ", level); |
| if (addressprint) |
| if (fi->pc != sal.pc || !sal.symtab) |
| { |
| annotate_frame_address (); |
| print_address_numeric (fi->pc, 1, gdb_stdout); |
| annotate_frame_address_end (); |
| printf_filtered (" in "); |
| } |
| annotate_frame_function_name (); |
| fprintf_symbol_filtered (gdb_stdout, funname ? funname : "??", funlang, |
| DMGL_ANSI); |
| wrap_here (" "); |
| annotate_frame_args (); |
| fputs_filtered (" (", gdb_stdout); |
| if (args) |
| { |
| struct print_args_args args; |
| args.fi = fi; |
| args.func = func; |
| args.stream = gdb_stdout; |
| catch_errors (print_args_stub, &args, "", RETURN_MASK_ALL); |
| QUIT; |
| } |
| printf_filtered (")"); |
| if (sal.symtab && sal.symtab->filename) |
| { |
| annotate_frame_source_begin (); |
| wrap_here (" "); |
| printf_filtered (" at "); |
| annotate_frame_source_file (); |
| printf_filtered ("%s", sal.symtab->filename); |
| annotate_frame_source_file_end (); |
| printf_filtered (":"); |
| annotate_frame_source_line (); |
| printf_filtered ("%d", sal.line); |
| annotate_frame_source_end (); |
| } |
| |
| #ifdef PC_LOAD_SEGMENT |
| /* If we couldn't print out function name but if can figure out what |
| load segment this pc value is from, at least print out some info |
| about its load segment. */ |
| if (!funname) |
| { |
| annotate_frame_where (); |
| wrap_here (" "); |
| printf_filtered (" from %s", PC_LOAD_SEGMENT (fi->pc)); |
| } |
| #endif |
| #ifdef PC_SOLIB |
| if (!funname || (!sal.symtab || !sal.symtab->filename)) |
| { |
| char *lib = PC_SOLIB (fi->pc); |
| if (lib) |
| { |
| annotate_frame_where (); |
| wrap_here (" "); |
| printf_filtered (" from %s", lib); |
| } |
| } |
| #endif |
| printf_filtered ("\n"); |
| } |
| |
| if ((source != 0) && sal.symtab) |
| { |
| int done = 0; |
| int mid_statement = source < 0 && fi->pc != sal.pc; |
| if (annotation_level) |
| done = identify_source_line (sal.symtab, sal.line, mid_statement, |
| fi->pc); |
| if (!done) |
| { |
| if (addressprint && mid_statement && !tui_version) |
| { |
| print_address_numeric (fi->pc, 1, gdb_stdout); |
| printf_filtered ("\t"); |
| } |
| if (print_frame_info_listing_hook) |
| print_frame_info_listing_hook (sal.symtab, sal.line, sal.line + 1, 0); |
| else if (!tui_version) |
| print_source_lines (sal.symtab, sal.line, sal.line + 1, 0); |
| } |
| current_source_line = max (sal.line - lines_to_list / 2, 1); |
| } |
| if (source != 0) |
| set_default_breakpoint (1, fi->pc, sal.symtab, sal.line); |
| |
| annotate_frame_end (); |
| |
| gdb_flush (gdb_stdout); |
| } |
| |
| |
| #if 0 |
| void |
| stack_publish_stopped_with_no_frame () |
| { |
| TUIDO (((TuiOpaqueFuncPtr) tuiUpdateOnEnd)); |
| |
| return; |
| } |
| #endif |
| |
| /* Show or print the frame info. If this is the tui, it will be shown in |
| the source display */ |
| void |
| print_frame_info (fi, level, source, args) |
| struct frame_info *fi; |
| register int level; |
| int source; |
| int args; |
| { |
| if (!tui_version) |
| print_frame_info_base (fi, level, source, args); |
| else |
| { |
| if (fi && (frame_in_dummy (fi) || fi->signal_handler_caller)) |
| print_frame_info_base (fi, level, source, args); |
| else |
| { |
| TUIDO (((TuiOpaqueFuncPtr) tui_vShowFrameInfo, fi)); |
| } |
| } |
| } |
| |
| /* 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 (fi) |
| struct frame_info *fi; |
| { |
| TUIDO (((TuiOpaqueFuncPtr) tui_vShowFrameInfo, 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 (frame_exp) |
| char *frame_exp; |
| { |
| int numargs = 0; |
| #define MAXARGS 4 |
| CORE_ADDR args[MAXARGS]; |
| |
| 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); |
| |
| { |
| tmp_cleanup = make_cleanup (free, addr_string); |
| args[numargs++] = parse_and_eval_address (addr_string); |
| do_cleanups (tmp_cleanup); |
| } |
| |
| /* Skip spaces, move to possible next arg. */ |
| while (*p == ' ') |
| p++; |
| frame_exp = p; |
| } |
| } |
| |
| switch (numargs) |
| { |
| case 0: |
| if (selected_frame == NULL) |
| error ("No selected frame."); |
| return selected_frame; |
| /* NOTREACHED */ |
| case 1: |
| { |
| int level = args[0]; |
| 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 %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 && fid->frame != args[0]; |
| fid = get_prev_frame (fid)) |
| ; |
| |
| if (fid) |
| while ((tfid = get_prev_frame (fid)) && |
| (tfid->frame == 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 */ |
| } |
| |
| /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except |
| that if it is unsure about the answer, it returns 0 |
| instead of guessing (this happens on the VAX and i960, for example). |
| |
| On most machines, we never have to guess about the args address, |
| so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */ |
| #if !defined (FRAME_ARGS_ADDRESS_CORRECT) |
| #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS |
| #endif |
| |
| /* 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 (addr_exp, from_tty) |
| 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; |
| |
| if (!target_has_stack) |
| error ("No stack."); |
| |
| fi = parse_frame_specification (addr_exp); |
| if (fi == NULL) |
| error ("Invalid frame specified."); |
| |
| sal = find_pc_line (fi->pc, |
| fi->next != NULL |
| && !fi->next->signal_handler_caller |
| && !frame_in_dummy (fi->next)); |
| func = get_frame_function (fi); |
| s = find_pc_symtab (fi->pc); |
| if (func) |
| { |
| /* I'd like to use SYMBOL_SOURCE_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 = 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_SOURCE_NAME (func); |
| } |
| } |
| else |
| { |
| register struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc); |
| if (msymbol != NULL) |
| { |
| funname = SYMBOL_NAME (msymbol); |
| funlang = SYMBOL_LANGUAGE (msymbol); |
| } |
| } |
| calling_frame_info = get_prev_frame (fi); |
| |
| if (!addr_exp && selected_frame_level >= 0) |
| { |
| printf_filtered ("Stack level %d, frame at ", selected_frame_level); |
| print_address_numeric (fi->frame, 1, gdb_stdout); |
| printf_filtered (":\n"); |
| } |
| else |
| { |
| printf_filtered ("Stack frame at "); |
| print_address_numeric (fi->frame, 1, gdb_stdout); |
| printf_filtered (":\n"); |
| } |
| printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM)); |
| print_address_numeric (fi->pc, 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 ", REGISTER_NAME (PC_REGNUM)); |
| print_address_numeric (FRAME_SAVED_PC (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 (calling_frame_info->frame, 1, gdb_stdout); |
| } |
| if (fi->next && calling_frame_info) |
| puts_filtered (","); |
| wrap_here (" "); |
| if (fi->next) |
| { |
| printf_filtered (" caller of frame at "); |
| print_address_numeric (fi->next->frame, 1, gdb_stdout); |
| } |
| if (fi->next || calling_frame_info) |
| puts_filtered ("\n"); |
| if (s) |
| printf_filtered (" source language %s.\n", language_str (s->language)); |
| |
| #ifdef PRINT_EXTRA_FRAME_INFO |
| PRINT_EXTRA_FRAME_INFO (fi); |
| #endif |
| |
| { |
| /* Address of the argument list for this frame, or 0. */ |
| CORE_ADDR arg_list = FRAME_ARGS_ADDRESS_CORRECT (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 (","); |
| |
| numargs = FRAME_NUM_ARGS (fi); |
| if (numargs < 0) |
| puts_filtered (" args: "); |
| else 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 = 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 (","); |
| } |
| } |
| |
| FRAME_INIT_SAVED_REGS (fi); |
| if (fi->saved_regs != NULL) |
| { |
| /* The sp is special; what's returned isn't the save address, but |
| actually the value of the previous frame's sp. */ |
| printf_filtered (" Previous frame's sp is "); |
| print_address_numeric (fi->saved_regs[SP_REGNUM], 1, gdb_stdout); |
| printf_filtered ("\n"); |
| count = 0; |
| numregs = ARCH_NUM_REGS; |
| for (i = 0; i < numregs; i++) |
| if (fi->saved_regs[i] && i != SP_REGNUM) |
| { |
| if (count == 0) |
| puts_filtered (" Saved registers:\n "); |
| else |
| puts_filtered (","); |
| wrap_here (" "); |
| printf_filtered (" %s at ", REGISTER_NAME (i)); |
| print_address_numeric (fi->saved_regs[i], 1, gdb_stdout); |
| count++; |
| } |
| if (count) |
| puts_filtered ("\n"); |
| } |
| else |
| { |
| /* We could get some information about saved registers by |
| calling get_saved_register on each register. Which info goes |
| with which frame is necessarily lost, however, and I suspect |
| that the users don't care whether they get the info. */ |
| 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 (count_exp, from_tty) |
| char *count_exp; |
| int from_tty; |
| { |
| int count = parse_and_eval_address (count_exp); |
| |
| if (count < 0) |
| error ("Negative argument not meaningful as backtrace limit."); |
| |
| backtrace_limit = count; |
| } |
| |
| static void |
| backtrace_limit_info (arg, from_tty) |
| 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 PARAMS ((char *count_exp, int show_locals, int from_tty)); |
| static void |
| backtrace_command_1 (count_exp, show_locals, from_tty) |
| char *count_exp; |
| int show_locals; |
| int from_tty; |
| { |
| struct frame_info *fi; |
| register int count; |
| register int i; |
| register struct frame_info *trailing; |
| register 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 (); |
| trailing_level = 0; |
| if (count_exp) |
| { |
| count = parse_and_eval_address (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 (fi->pc); |
| 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_base (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 (arg, from_tty) |
| 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++) |
| { |
| 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) |
| free (argPtr); |
| |
| if (old_chain) |
| do_cleanups (old_chain); |
| } |
| |
| static void backtrace_full_command PARAMS ((char *arg, int from_tty)); |
| static void |
| backtrace_full_command (arg, from_tty) |
| 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 (b, fi, num_tabs, stream) |
| struct block *b; |
| register struct frame_info *fi; |
| int num_tabs; |
| register GDB_FILE *stream; |
| { |
| int nsyms; |
| register int i, j; |
| register struct symbol *sym; |
| register int values_printed = 0; |
| |
| nsyms = BLOCK_NSYMS (b); |
| |
| for (i = 0; i < nsyms; i++) |
| { |
| sym = BLOCK_SYM (b, i); |
| switch (SYMBOL_CLASS (sym)) |
| { |
| case LOC_LOCAL: |
| case LOC_REGISTER: |
| case LOC_STATIC: |
| case LOC_BASEREG: |
| values_printed = 1; |
| for (j = 0; j < num_tabs; j++) |
| fputs_filtered ("\t", stream); |
| fputs_filtered (SYMBOL_SOURCE_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 (b, have_default, stream) |
| struct block *b; |
| int *have_default; |
| register GDB_FILE *stream; |
| { |
| int nsyms; |
| register int i; |
| register struct symbol *sym; |
| register int values_printed = 0; |
| |
| 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 symtab_and_line sal; |
| sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); |
| values_printed = 1; |
| fputs_filtered (SYMBOL_SOURCE_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 (fi, num_tabs, stream) |
| register struct frame_info *fi; |
| register int num_tabs; |
| register GDB_FILE *stream; |
| { |
| register struct block *block = get_frame_block (fi); |
| register 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 (fi, this_level_only, stream) |
| register struct frame_info *fi; |
| int this_level_only; |
| register GDB_FILE *stream; |
| { |
| register struct blockvector *bl; |
| register struct block *block = get_frame_block (fi); |
| register int values_printed = 0; |
| int index, have_default = 0; |
| char *blocks_printed; |
| CORE_ADDR pc = fi->pc; |
| |
| 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"); |
| } |
| } |
| |
| /* ARGSUSED */ |
| void |
| locals_info (args, from_tty) |
| char *args; |
| int from_tty; |
| { |
| if (!selected_frame) |
| error ("No frame selected."); |
| print_frame_local_vars (selected_frame, 0, gdb_stdout); |
| } |
| |
| static void |
| catch_info (ignore, from_tty) |
| 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 (!selected_frame) |
| error ("No frame selected."); |
| #endif |
| } |
| else |
| { |
| /* Assume g++ compiled code -- old v 4.16 behaviour */ |
| if (!selected_frame) |
| error ("No frame selected."); |
| |
| print_frame_label_vars (selected_frame, 0, gdb_stdout); |
| } |
| } |
| |
| static void |
| print_frame_arg_vars (fi, stream) |
| register struct frame_info *fi; |
| register GDB_FILE *stream; |
| { |
| struct symbol *func = get_frame_function (fi); |
| register struct block *b; |
| int nsyms; |
| register int i; |
| register struct symbol *sym, *sym2; |
| register int values_printed = 0; |
| |
| if (func == 0) |
| { |
| fprintf_filtered (stream, "No symbol table info available.\n"); |
| return; |
| } |
| |
| b = SYMBOL_BLOCK_VALUE (func); |
| nsyms = BLOCK_NSYMS (b); |
| |
| for (i = 0; i < nsyms; i++) |
| { |
| sym = BLOCK_SYM (b, i); |
| 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: |
| values_printed = 1; |
| fputs_filtered (SYMBOL_SOURCE_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 (SYMBOL_NAME (sym), |
| b, VAR_NAMESPACE, (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 (ignore, from_tty) |
| char *ignore; |
| int from_tty; |
| { |
| if (!selected_frame) |
| error ("No frame selected."); |
| print_frame_arg_vars (selected_frame, gdb_stdout); |
| } |
| |
| |
| static void |
| args_plus_locals_info (ignore, from_tty) |
| char *ignore; |
| int from_tty; |
| { |
| args_info (ignore, from_tty); |
| locals_info (ignore, from_tty); |
| } |
| |
| |
| /* Select frame FI, and note that its stack level is LEVEL. |
| LEVEL may be -1 if an actual level number is not known. */ |
| |
| void |
| select_frame (fi, level) |
| struct frame_info *fi; |
| int level; |
| { |
| register struct symtab *s; |
| |
| selected_frame = fi; |
| selected_frame_level = level; |
| if (selected_frame_level_changed_hook) |
| selected_frame_level_changed_hook (level); |
| |
| /* Ensure that symbols for this frame are read in. Also, determine the |
| source language of this frame, and switch to it if desired. */ |
| if (fi) |
| { |
| s = find_pc_symtab (fi->pc); |
| if (s |
| && s->language != current_language->la_language |
| && s->language != language_unknown |
| && language_mode == language_mode_auto) |
| { |
| set_language (s->language); |
| } |
| /* elz: this if here fixes the problem with the pc not being displayed |
| in the tui asm layout, with no debug symbols. The value of s |
| would be 0 here, and select_source_symtab would abort the |
| command by calling the 'error' function */ |
| if (s) |
| { |
| TUIDO (((TuiOpaqueFuncPtr) tui_vSelectSourceSymtab, s)); |
| } |
| } |
| } |
| |
| |
| /* Select frame FI, noting that its stack level is LEVEL. Also print |
| the stack frame and show the source if this is the tui version. */ |
| void |
| select_and_print_frame (fi, level) |
| struct frame_info *fi; |
| int level; |
| { |
| select_frame (fi, level); |
| if (fi) |
| { |
| print_stack_frame (fi, level, 1); |
| TUIDO (((TuiOpaqueFuncPtr) tui_vCheckDataValues, fi)); |
| } |
| } |
| |
| |
| /* Select frame FI, noting that its stack level is LEVEL. Be silent if |
| not the TUI */ |
| #if 0 |
| void |
| select_and_maybe_print_frame (fi, level) |
| struct frame_info *fi; |
| int level; |
| { |
| if (!tui_version) |
| select_frame (fi, level); |
| else |
| select_and_print_frame (fi, level); |
| } |
| #endif |
| |
| |
| /* Store the selected frame and its level into *FRAMEP and *LEVELP. |
| If there is no selected frame, *FRAMEP is set to NULL. */ |
| |
| void |
| record_selected_frame (frameaddrp, levelp) |
| CORE_ADDR *frameaddrp; |
| int *levelp; |
| { |
| *frameaddrp = selected_frame ? selected_frame->frame : 0; |
| *levelp = selected_frame_level; |
| } |
| |
| /* Return the symbol-block in which the selected frame is executing. |
| Can return zero under various legitimate circumstances. */ |
| |
| struct block * |
| get_selected_block () |
| { |
| if (!target_has_stack) |
| return 0; |
| |
| if (!selected_frame) |
| return get_current_block (); |
| return get_frame_block (selected_frame); |
| } |
| |
| /* 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 (frame, level_offset_ptr) |
| register struct frame_info *frame; |
| register int *level_offset_ptr; |
| { |
| register struct frame_info *prev; |
| register 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. */ |
| |
| /* ARGSUSED */ |
| static void |
| select_frame_command (level_exp, from_tty) |
| char *level_exp; |
| int from_tty; |
| { |
| register struct frame_info *frame, *frame1; |
| unsigned int level = 0; |
| |
| if (!target_has_stack) |
| error ("No stack."); |
| |
| frame = parse_frame_specification (level_exp); |
| |
| /* Try to figure out what level this frame is. But if there is |
| no current stack, don't error out -- let the user set one. */ |
| frame1 = 0; |
| if (get_current_frame ()) |
| { |
| for (frame1 = get_prev_frame (0); |
| frame1 && frame1 != frame; |
| frame1 = get_prev_frame (frame1)) |
| level++; |
| } |
| |
| if (!frame1) |
| level = 0; |
| |
| select_frame (frame, level); |
| } |
| |
| /* 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 (level_exp, from_tty) |
| char *level_exp; |
| int from_tty; |
| { |
| select_frame_command (level_exp, from_tty); |
| show_and_print_stack_frame (selected_frame, selected_frame_level, 1); |
| } |
| |
| /* The XDB Compatibility command to print the current frame. */ |
| |
| static void |
| current_frame_command (level_exp, from_tty) |
| char *level_exp; |
| int from_tty; |
| { |
| if (target_has_stack == 0 || selected_frame == 0) |
| error ("No stack."); |
| print_only_stack_frame (selected_frame, selected_frame_level, 1); |
| } |
| |
| /* Select the frame up one or COUNT stack levels |
| from the previously selected frame, and print it briefly. */ |
| |
| /* ARGSUSED */ |
| static void |
| up_silently_base (count_exp) |
| char *count_exp; |
| { |
| register struct frame_info *fi; |
| int count = 1, count1; |
| if (count_exp) |
| count = parse_and_eval_address (count_exp); |
| count1 = count; |
| |
| if (target_has_stack == 0 || selected_frame == 0) |
| error ("No stack."); |
| |
| fi = find_relative_frame (selected_frame, &count1); |
| if (count1 != 0 && count_exp == 0) |
| error ("Initial frame selected; you cannot go up."); |
| select_frame (fi, selected_frame_level + count - count1); |
| } |
| |
| static void |
| up_silently_command (count_exp, from_tty) |
| char *count_exp; |
| int from_tty; |
| { |
| up_silently_base (count_exp); |
| if (tui_version) |
| print_stack_frame (selected_frame, selected_frame_level, 1); |
| } |
| |
| static void |
| up_command (count_exp, from_tty) |
| char *count_exp; |
| int from_tty; |
| { |
| up_silently_base (count_exp); |
| show_and_print_stack_frame (selected_frame, selected_frame_level, 1); |
| } |
| |
| /* Select the frame down one or COUNT stack levels |
| from the previously selected frame, and print it briefly. */ |
| |
| /* ARGSUSED */ |
| static void |
| down_silently_base (count_exp) |
| char *count_exp; |
| { |
| register struct frame_info *frame; |
| int count = -1, count1; |
| if (count_exp) |
| count = -parse_and_eval_address (count_exp); |
| count1 = count; |
| |
| if (target_has_stack == 0 || selected_frame == 0) |
| error ("No stack."); |
| |
| frame = find_relative_frame (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 + count - count1); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| down_silently_command (count_exp, from_tty) |
| char *count_exp; |
| int from_tty; |
| { |
| down_silently_base (count_exp); |
| if (tui_version) |
| print_stack_frame (selected_frame, selected_frame_level, 1); |
| } |
| |
| static void |
| down_command (count_exp, from_tty) |
| char *count_exp; |
| int from_tty; |
| { |
| down_silently_base (count_exp); |
| show_and_print_stack_frame (selected_frame, selected_frame_level, 1); |
| } |
| |
| static void |
| return_command (retval_exp, from_tty) |
| char *retval_exp; |
| int from_tty; |
| { |
| struct symbol *thisfun; |
| CORE_ADDR selected_frame_addr; |
| CORE_ADDR selected_frame_pc; |
| struct frame_info *frame; |
| value_ptr return_value = NULL; |
| |
| if (selected_frame == NULL) |
| error ("No selected frame."); |
| thisfun = get_frame_function (selected_frame); |
| selected_frame_addr = FRAME_FP (selected_frame); |
| selected_frame_pc = selected_frame->pc; |
| |
| /* Compute the return value (if any -- possibly getting errors here). */ |
| |
| if (retval_exp) |
| { |
| struct type *return_type = NULL; |
| |
| return_value = parse_and_eval (retval_exp); |
| |
| /* Cast return value to the return type of the function. */ |
| 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 we have fully evaluated it, since |
| it might live in the stack frame we're about to pop. */ |
| if (VALUE_LAZY (return_value)) |
| value_fetch_lazy (return_value); |
| } |
| |
| /* If interactive, require confirmation. */ |
| |
| if (from_tty) |
| { |
| if (thisfun != 0) |
| { |
| if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun))) |
| { |
| error ("Not confirmed."); |
| /* NOTREACHED */ |
| } |
| } |
| else if (!query ("Make selected stack frame return now? ")) |
| error ("Not confirmed."); |
| } |
| |
| /* Do the real work. Pop until the specified frame is current. We |
| use this method because the selected_frame is not valid after |
| a POP_FRAME. The pc comparison makes this work even if the |
| selected frame shares its fp with another frame. */ |
| |
| while (selected_frame_addr != (frame = get_current_frame ())->frame |
| || selected_frame_pc != frame->pc) |
| POP_FRAME; |
| |
| /* Then pop that frame. */ |
| |
| POP_FRAME; |
| |
| /* Compute the return value (if any) and store in the place |
| for return values. */ |
| |
| if (retval_exp) |
| set_return_value (return_value); |
| |
| /* 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 PARAMS ((char *arg, int from_tty)); |
| static void |
| func_command (arg, from_tty) |
| 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 = (fp->pc >= func_bounds[i].low && |
| fp->pc < func_bounds[i].high); |
| if (!found) |
| { |
| level = 1; |
| fp = find_relative_frame (fp, &level); |
| } |
| } |
| while (!found && level == 0); |
| |
| if (func_bounds) |
| free (func_bounds); |
| |
| if (!found) |
| printf_filtered ("'%s' not within current stack frame.\n", arg); |
| else if (fp != selected_frame) |
| select_and_print_frame (fp, level); |
| } |
| |
| /* Gets the language of the current frame. */ |
| |
| enum language |
| get_frame_language () |
| { |
| register struct symtab *s; |
| enum language flang; /* The language of the current frame */ |
| |
| if (selected_frame) |
| { |
| s = find_pc_symtab (selected_frame->pc); |
| if (s) |
| flang = s->language; |
| else |
| flang = language_unknown; |
| } |
| else |
| flang = language_unknown; |
| |
| return flang; |
| } |
| |
| void |
| _initialize_stack () |
| { |
| #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 |
| } |