diff options
Diffstat (limited to 'gdb/stack.c')
| -rw-r--r-- | gdb/stack.c | 2019 |
1 files changed, 2019 insertions, 0 deletions
diff --git a/gdb/stack.c b/gdb/stack.c new file mode 100644 index 0000000..e36316e --- /dev/null +++ b/gdb/stack.c @@ -0,0 +1,2019 @@ +/* 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 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 (args) + char *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 (args) + char *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 (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 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, (char *)&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, (char *)&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, + (char *)&args, "", RETURN_MASK_ALL); +} + +struct print_args_args { + struct symbol *func; + struct frame_info *fi; +}; + +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; + + FRAME_NUM_ARGS (numargs, (p->fi)); + print_frame_args (p->func, p->fi, numargs, gdb_stdout); + 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; + 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); +} + + +void +stack_publish_stopped_with_no_frame() +{ + TUIDO(((TuiOpaqueFuncPtr)tuiUpdateOnEnd)); + + return; +} + +/* 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 = 0; +#ifdef FRAMELESS_FUNCTION_INVOCATION + FRAMELESS_FUNCTION_INVOCATION (fi, frameless); +#endif + 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 (","); + + FRAME_NUM_ARGS (numargs, 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 (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 ((make_cleanup_func) freeargv, (char *)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 && subsetCompare(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 (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 */ +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); +} + + +/* 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. */ + +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 (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 +} |