/* Print and select stack frames for GDB, the GNU debugger.
- Copyright (C) 1986, 1987 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1989, 1991, 1992, 1993 Free Software Foundation, Inc.
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
+This file is part of GDB.
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
+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.
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
+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.
-#include <stdio.h>
+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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "defs.h"
-#include "initialize.h"
-#include "param.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"
-START_FILE
+static void
+return_command PARAMS ((char *, int));
+
+static void
+down_command PARAMS ((char *, int));
+
+static void
+down_silently_command PARAMS ((char *, int));
+
+static void
+up_command PARAMS ((char *, int));
+
+static void
+up_silently_command PARAMS ((char *, int));
+
+static void
+frame_command PARAMS ((char *, int));
+
+static void
+select_frame_command PARAMS ((char *, int));
+
+static void
+args_info PARAMS ((char *, int));
+
+static void
+print_frame_arg_vars PARAMS ((FRAME, GDB_FILE *));
+
+static void
+catch_info PARAMS ((char *, int));
-/* Thie "selected" stack frame is used by default for local and arg access.
+static void
+locals_info PARAMS ((char *, int));
+
+static void
+print_frame_label_vars PARAMS ((FRAME, int, GDB_FILE *));
+
+static void
+print_frame_local_vars PARAMS ((FRAME, GDB_FILE *));
+
+static int
+print_block_frame_labels PARAMS ((struct block *, int *, GDB_FILE *));
+
+static int
+print_block_frame_locals PARAMS ((struct block *, FRAME, GDB_FILE *));
+
+static void
+backtrace_command PARAMS ((char *, int));
+
+static FRAME
+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. */
FRAME selected_frame;
int frame_file_full_name = 0;
-static void select_calling_frame ();
-
-void print_frame_info ();
\f
-/* Print a stack frame briefly. FRAME should be the frame address
+struct print_stack_frame_args {
+ struct frame_info *fi;
+ int level;
+ int source;
+ int args;
+};
+
+static int print_stack_frame_stub PARAMS ((char *));
+
+/* 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;
+ print_frame_info (p->fi, p->level, p->source, p->args);
+ return 0;
+}
+
+/* Print a stack frame briefly. FRAME should be the frame id
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 SOURCE is 1, print the source line as well.
If SOURCE is -1, print ONLY the source line. */
-static void
+void
print_stack_frame (frame, level, source)
FRAME frame;
int level;
int source;
{
- struct frame_info fi;
+ struct print_stack_frame_args args;
- fi = get_frame_info (frame);
+ args.fi = get_frame_info (frame);
+ args.level = level;
+ args.source = source;
+ args.args = 1;
- print_frame_info (&fi, level, source, 1);
+ catch_errors (print_stack_frame_stub, (char *)&args, "", RETURN_MASK_ERROR);
+}
+
+struct print_args_args {
+ struct symbol *func;
+ struct frame_info *fi;
+};
+
+static int print_args_stub PARAMS ((char *));
+
+/* Pass the args the way catch_errors wants them. */
+static int
+print_args_stub (args)
+ char *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;
}
void
int source;
int args;
{
- register FRAME frame = fi->frame;
struct symtab_and_line sal;
struct symbol *func;
register char *funname = 0;
- int numargs;
+ enum language funlang = language_unknown;
+ char buf[MAX_REGISTER_RAW_SIZE];
+ CORE_ADDR sp;
+
+#if 0
+ /* 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
+ {
+ /* Do this regardless of SOURCE because we don't have any source
+ to list for this frame. */
+ if (level >= 0)
+ printf_filtered ("#%-2d ", level);
+ printf_filtered ("<function called from gdb>\n");
+ return;
+ }
+ if (fi->signal_handler_caller)
+ {
+ /* Do this regardless of SOURCE because we don't have any source
+ to list for this frame. */
+ if (level >= 0)
+ printf_filtered ("#%-2d ", level);
+ printf_filtered ("<signal handler called>\n");
+ return;
+ }
- sal = find_pc_line (fi->pc, fi->next_frame);
- func = get_frame_function (frame);
+ /* 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)
- funname = SYMBOL_NAME (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))))
+ {
+ /* In this case we have no way of knowing the source file
+ and line number, so don't print them. */
+ sal.symtab = 0;
+ /* 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
+ {
+ funname = SYMBOL_NAME (func);
+ funlang = SYMBOL_LANGUAGE (func);
+ }
+ }
else
{
- register int misc_index = find_pc_misc_function (fi->pc);
- if (misc_index >= 0)
- funname = misc_function_vector[misc_index].name;
+ register 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)
{
- /* This avoids a bug in cc on the sun. */
- struct frame_info tem;
- tem = *fi;
-
if (level >= 0)
- printf ("#%-2d ", level);
- if (fi->pc != sal.pc || !sal.symtab)
- printf ("0x%x in ", fi->pc);
- printf ("%s (", funname ? funname : "??");
+ printf_filtered ("#%-2d ", level);
+ if (addressprint)
+ if (fi->pc != sal.pc || !sal.symtab)
+ {
+ print_address_numeric (fi->pc, gdb_stdout);
+ printf_filtered (" in ");
+ }
+ fprintf_symbol_filtered (gdb_stdout, funname ? funname : "??", funlang,
+ DMGL_ANSI);
+ wrap_here (" ");
+ fputs_filtered (" (", gdb_stdout);
if (args)
{
- FRAME_NUM_ARGS (numargs, tem);
- print_frame_args (func, FRAME_ARGS_ADDRESS (tem), numargs, stdout);
+ struct print_args_args args;
+ args.fi = fi;
+ args.func = func;
+ catch_errors (print_args_stub, (char *)&args, "", RETURN_MASK_ERROR);
+ }
+ printf_filtered (")");
+ if (sal.symtab && sal.symtab->filename)
+ {
+ wrap_here (" ");
+ printf_filtered (" at %s:%d", sal.symtab->filename, sal.line);
}
- printf (")");
- if (sal.symtab)
- printf (" (%s line %d)", sal.symtab->filename, sal.line);
- printf ("\n");
+
+#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) {
+ wrap_here (" ");
+ printf_filtered (" from %s", PC_LOAD_SEGMENT (fi->pc));
+ }
+#endif
+ printf_filtered ("\n");
}
- if (source != 0 && sal.symtab)
+ if ((source != 0) && sal.symtab)
{
int done = 0;
int mid_statement = source < 0 && fi->pc != sal.pc;
if (frame_file_full_name)
- done = identify_source_line (sal.symtab, sal.line, mid_statement);
+ done = identify_source_line (sal.symtab, sal.line, mid_statement,
+ fi->pc);
if (!done)
{
- if (mid_statement)
- printf ("0x%x\t", fi->pc);
- print_source_lines (sal.symtab, sal.line, sal.line + 1, 1);
+ if (addressprint && mid_statement)
+ {
+ print_address_numeric (fi->pc, gdb_stdout);
+ printf_filtered ("\t");
+ }
+ print_source_lines (sal.symtab, sal.line, sal.line + 1, 0);
}
- current_source_line = max (sal.line - 5, 1);
+ current_source_line = max (sal.line - lines_to_list/2, 1);
}
if (source != 0)
set_default_breakpoint (1, fi->pc, sal.symtab, sal.line);
- fflush (stdout);
+ gdb_flush (gdb_stdout);
}
-/* Call here to print info on selected frame, after a trap. */
-
-void
-print_sel_frame (just_source)
- int just_source;
+/*
+ * 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).
+ */
+static FRAME
+parse_frame_specification (frame_exp)
+ char *frame_exp;
{
- print_stack_frame (selected_frame, -1, just_source ? -1 : 1);
-}
+ int numargs = 0;
+#define MAXARGS 4
+ CORE_ADDR args[MAXARGS];
+
+ if (frame_exp)
+ {
+ char *addr_string, *p;
+ struct cleanup *tmp_cleanup;
-/* Print info on the selected frame, including level number
- but not source. */
+ while (*frame_exp == ' ') frame_exp++;
-print_selected_frame ()
-{
- print_stack_frame (selected_frame, selected_frame_level, 0);
+ 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];
+ FRAME fid = find_relative_frame (get_current_frame (), &level);
+ FRAME tfid;
+
+ if (level == 0)
+ /* find_relative_frame was successful */
+ return fid;
+
+ /* 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 && FRAME_FP (fid) != args[0];
+ fid = get_prev_frame (fid))
+ ;
+
+ if (fid)
+ while ((tfid = get_prev_frame (fid)) &&
+ (FRAME_FP (tfid) == args[0]))
+ fid = tfid;
+
+ /* We couldn't identify the frame as an existing frame, but
+ perhaps we can create one with a single argument.
+ Fall through to default case; it's up to SETUP_ARBITRARY_FRAME
+ to complain if it doesn't like a single arg. */
+ }
+
+ 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)
+frame_info (addr_exp, from_tty)
char *addr_exp;
+ int from_tty;
{
- FRAME frame = addr_exp ? parse_and_eval_address (addr_exp) : selected_frame;
- struct frame_info fi;
+ FRAME frame;
+ struct frame_info *fi;
struct frame_saved_regs fsr;
struct symtab_and_line sal;
struct symbol *func;
+ struct symtab *s;
FRAME calling_frame;
int i, count;
char *funname = 0;
- int numargs;
+ enum language funlang = language_unknown;
+
+ if (!target_has_stack)
+ error ("No stack.");
+
+ frame = parse_frame_specification (addr_exp);
+ if (!frame)
+ error ("Invalid frame specified.");
fi = get_frame_info (frame);
- get_frame_saved_regs (&fi, &fsr);
- sal = find_pc_line (fi.pc, fi.next_frame);
+ sal = find_pc_line (fi->pc,
+ fi->next != NULL
+ && !fi->next->signal_handler_caller
+ && !frame_in_dummy (fi->next));
func = get_frame_function (frame);
+ s = find_pc_symtab(fi->pc);
if (func)
- funname = SYMBOL_NAME (func);
+ {
+ funname = SYMBOL_NAME (func);
+ funlang = SYMBOL_LANGUAGE (func);
+ }
else
{
- register int misc_index = find_pc_misc_function (fi.pc);
- if (misc_index >= 0)
- funname = misc_function_vector[misc_index].name;
+ 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 = get_prev_frame (frame);
if (!addr_exp && selected_frame_level >= 0)
- printf ("Stack level %d, frame at 0x%x:\n pc = 0x%x",
- selected_frame_level, frame, fi.pc);
+ {
+ printf_filtered ("Stack level %d, frame at ", selected_frame_level);
+ print_address_numeric (FRAME_FP(frame), gdb_stdout);
+ printf_filtered (":\n");
+ }
else
- printf ("Stack frame at 0x%x:\n pc = 0x%x",
- frame, fi.pc);
+ {
+ printf_filtered ("Stack frame at ");
+ print_address_numeric (FRAME_FP(frame), gdb_stdout);
+ printf_filtered (":\n");
+ }
+ printf_filtered (" %s = ",
+ reg_names[PC_REGNUM]);
+ print_address_numeric (fi->pc, gdb_stdout);
+ wrap_here (" ");
if (funname)
- printf (" in %s", funname);
+ {
+ printf_filtered (" in ");
+ fprintf_symbol_filtered (gdb_stdout, funname, funlang,
+ DMGL_ANSI | DMGL_PARAMS);
+ }
+ wrap_here (" ");
if (sal.symtab)
- printf (" (%s line %d)", sal.symtab->filename, sal.line);
- printf ("; saved pc 0x%x\n", FRAME_SAVED_PC (frame));
- if (calling_frame)
- printf (" called by frame at 0x%x", calling_frame);
- if (fi.next_frame && calling_frame)
- printf (",");
- if (fi.next_frame)
- printf (" caller of frame at 0x%x", fi.next_frame);
- if (fi.next_frame || calling_frame)
- printf ("\n");
- printf (" Arglist at 0x%x,", FRAME_ARGS_ADDRESS (fi));
- FRAME_NUM_ARGS (i, fi);
- if (i < 0)
- printf (" args: ");
- else if (i == 0)
- printf (" no args.");
- else if (i == 1)
- printf (" 1 arg: ");
- else
- printf (" %d args: ", i);
+ printf_filtered (" (%s:%d)", sal.symtab->filename, sal.line);
+ puts_filtered ("; ");
+ wrap_here (" ");
+ printf_filtered ("saved %s ", reg_names[PC_REGNUM]);
+ print_address_numeric (FRAME_SAVED_PC (frame), gdb_stdout);
+ printf_filtered ("\n");
+
+ {
+ int frameless = 0;
+#ifdef FRAMELESS_FUNCTION_INVOCATION
+ FRAMELESS_FUNCTION_INVOCATION (fi, frameless);
+#endif
+ if (frameless)
+ printf_filtered (" (FRAMELESS),");
+ }
- FRAME_NUM_ARGS (numargs, fi);
- print_frame_args (func, FRAME_ARGS_ADDRESS (fi), numargs, stdout);
- printf ("\n");
+ if (calling_frame)
+ {
+ printf_filtered (" called by frame at ");
+ print_address_numeric (FRAME_FP (calling_frame), gdb_stdout);
+ }
+ if (fi->next && calling_frame)
+ puts_filtered (",");
+ wrap_here (" ");
+ if (fi->next)
+ {
+ printf_filtered (" caller of frame at ");
+ print_address_numeric (fi->next->frame, gdb_stdout);
+ }
+ if (fi->next || calling_frame)
+ 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, 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, gdb_stdout);
+ printf_filtered (",");
+ }
+ }
+
+#if defined (FRAME_FIND_SAVED_REGS)
+ get_frame_saved_regs (fi, &fsr);
+ /* 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 (fsr.regs[SP_REGNUM], gdb_stdout);
+ printf_filtered ("\n");
count = 0;
for (i = 0; i < NUM_REGS; i++)
- if (fsr.regs[i])
+ if (fsr.regs[i] && i != SP_REGNUM)
{
- if (count % 4 != 0)
- printf (", ");
+ if (count == 0)
+ puts_filtered (" Saved registers:\n ");
else
- {
- if (count == 0)
- printf (" Saved registers:");
- printf ("\n ");
- }
- printf ("%s at 0x%x", reg_names[i], fsr.regs[i]);
+ puts_filtered (",");
+ wrap_here (" ");
+ printf_filtered (" %s at ", reg_names[i]);
+ print_address_numeric (fsr.regs[i], gdb_stdout);
count++;
}
if (count)
- printf ("\n");
+ puts_filtered ("\n");
+#else /* Have FRAME_FIND_SAVED_REGS. */
+ puts_filtered ("\n");
+#endif /* Have FRAME_FIND_SAVED_REGS. */
+}
+
+#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 (count_exp)
+backtrace_command (count_exp, from_tty)
char *count_exp;
+ int from_tty;
{
- struct frame_info fi;
+ struct frame_info *fi;
register int count;
register FRAME frame;
register int i;
-
+ register FRAME 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);
+ {
+ count = parse_and_eval_address (count_exp);
+ if (count < 0)
+ {
+ FRAME 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;
- for (i = 0, frame = get_current_frame (), fi = get_frame_info (frame);
+ 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 (frame = trailing;
+ frame != NULL && i--;
+ frame = get_prev_frame (frame))
+ {
+ QUIT;
+ fi = get_frame_info (frame);
+ ps = find_pc_psymtab (fi->pc);
+ if (ps)
+ PSYMTAB_TO_SYMTAB (ps); /* Force syms to come in */
+ }
+ }
+
+ for (i = 0, frame = trailing;
frame && count--;
- i++, fi = get_prev_frame_info (fi.frame), frame = fi.frame)
+ i++, frame = get_prev_frame (frame))
{
QUIT;
- print_frame_info (&fi, i, 0, 1);
+ fi = get_frame_info (frame);
+
+ /* Don't use print_stack_frame; if an error() occurs it probably
+ means further attempts to backtrace would fail (on the other
+ hand, perhaps the code does or could be fixed to make sure
+ the frame->prev field gets set to NULL in that case). */
+ print_frame_info (fi, trailing_level + i, 0, 1);
}
+
+ /* If we've stopped before the end, mention that. */
+ if (frame && from_tty)
+ printf_filtered ("(More stack frames follow...)\n");
}
\f
-/* Print the local variables of a block B active in FRAME. */
+/* Print the local variables of a block B active in FRAME.
+ Return 1 if any variables were printed; 0 otherwise. */
-static void
+static int
print_block_frame_locals (b, frame, stream)
struct block *b;
register FRAME frame;
- register FILE *stream;
+ 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 (SYMBOL_CLASS (sym) == LOC_LOCAL
- || SYMBOL_CLASS (sym) == LOC_REGISTER
- || SYMBOL_CLASS (sym) == LOC_STATIC)
+ switch (SYMBOL_CLASS (sym))
{
- fprintf (stream, "%s = ", SYMBOL_NAME (sym));
+ case LOC_LOCAL:
+ case LOC_REGISTER:
+ case LOC_STATIC:
+ case LOC_BASEREG:
+ values_printed = 1;
+ fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream);
+ fputs_filtered (" = ", stream);
print_variable_value (sym, frame, stream);
- fprintf (stream, "\n");
- fflush (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), 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,
or 0 if nothing was printed because we have no info
on the function running in FRAME. */
-static int
+static void
print_frame_local_vars (frame, stream)
register FRAME frame;
- register FILE *stream;
+ register GDB_FILE *stream;
{
register struct block *block = get_frame_block (frame);
+ register int values_printed = 0;
+
if (block == 0)
- return 0;
+ {
+ fprintf_filtered (stream, "No symbol table info available.\n");
+ return;
+ }
+
+ while (block != 0)
+ {
+ if (print_block_frame_locals (block, frame, 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 (frame, this_level_only, stream)
+ register FRAME frame;
+ int this_level_only;
+ register GDB_FILE *stream;
+{
+ register struct blockvector *bl;
+ register struct block *block = get_frame_block (frame);
+ register int values_printed = 0;
+ int index, have_default = 0;
+ char *blocks_printed;
+ struct frame_info *fi = get_frame_info (frame);
+ 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)
{
- print_block_frame_locals (block, frame, stream);
+ 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. */
break;
block = BLOCK_SUPERBLOCK (block);
}
- return 1;
+
+ if (!values_printed && !this_level_only)
+ {
+ fprintf_filtered (stream, "No catches.\n");
+ }
}
+/* ARGSUSED */
static void
-locals_info ()
+locals_info (args, from_tty)
+ char *args;
+ int from_tty;
{
- print_frame_local_vars (selected_frame, stdout);
+ if (!selected_frame)
+ error ("No frame selected.");
+ print_frame_local_vars (selected_frame, gdb_stdout);
}
-static int
+static void
+catch_info (ignore, from_tty)
+ char *ignore;
+ int from_tty;
+{
+ if (!selected_frame)
+ error ("No frame selected.");
+ print_frame_label_vars (selected_frame, 0, gdb_stdout);
+}
+
+static void
print_frame_arg_vars (frame, stream)
register FRAME frame;
- register FILE *stream;
+ register GDB_FILE *stream;
{
struct symbol *func = get_frame_function (frame);
register struct block *b;
int nsyms;
register int i;
- register struct symbol *sym;
+ register struct symbol *sym, *sym2;
+ register int values_printed = 0;
if (func == 0)
- return 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);
- if (SYMBOL_CLASS (sym) == LOC_ARG)
+ switch (SYMBOL_CLASS (sym))
{
- fprintf (stream, "%s = ", SYMBOL_NAME (sym));
- print_variable_value (sym, frame, stream);
- fprintf (stream, "\n");
- fflush (stream);
+ 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, frame, stream);
+ fprintf_filtered (stream, "\n");
+ break;
+
+ default:
+ /* Don't worry about things which aren't arguments. */
+ break;
}
}
- return 1;
+ if (!values_printed)
+ {
+ fprintf_filtered (stream, "No arguments.\n");
+ }
}
static void
-args_info ()
+args_info (ignore, from_tty)
+ char *ignore;
+ int from_tty;
{
- print_frame_arg_vars (selected_frame, stdout);
+ if (!selected_frame)
+ error ("No frame selected.");
+ print_frame_arg_vars (selected_frame, gdb_stdout);
}
\f
/* Select frame FRAME, and note that its stack level is LEVEL.
FRAME frame;
int level;
{
+ register struct symtab *s;
+
selected_frame = frame;
selected_frame_level = 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 (frame)
+ {
+ s = find_pc_symtab (get_frame_info (frame)->pc);
+ if (s
+ && s->language != current_language->la_language
+ && s->language != language_unknown
+ && language_mode == language_mode_auto) {
+ set_language(s->language);
+ }
+ }
}
-/* Store the selected frame and its level into *FRAMEP and *LEVELP. */
+/* 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 (framep, levelp)
- FRAME *framep;
+record_selected_frame (frameaddrp, levelp)
+ FRAME_ADDR *frameaddrp;
int *levelp;
{
- *framep = selected_frame;
+ *frameaddrp = selected_frame ? FRAME_FP (selected_frame) : 0;
*levelp = selected_frame_level;
}
struct block *
get_selected_block ()
{
- if (!have_inferior_p () && !have_core_file_p ())
+ if (!target_has_stack)
return 0;
if (!selected_frame)
register int* level_offset_ptr;
{
register FRAME prev;
- struct frame_info fi;
- register FRAME frame1, frame2;
+ register FRAME frame1;
/* Going up is simple: just do get_prev_frame enough times
or until initial frame is reached. */
(*level_offset_ptr)--;
frame = prev;
}
- /* Going down could be done by iterating get_frame_info to
- find the next frame, but that would be quadratic
- since get_frame_info must scan all the way from the current frame.
- The following algotithm is linear. */
+ /* Going down is just as simple. */
if (*level_offset_ptr < 0)
{
- /* First put frame1 at innermost frame
- and frame2 N levels up from there. */
- frame1 = get_current_frame ();
- frame2 = frame1;
- while (*level_offset_ptr < 0 && frame2 != frame)
- {
- frame2 = get_prev_frame (frame2);
- (*level_offset_ptr) ++;
- }
- /* Then slide frame1 and frame2 up in synchrony
- and when frame2 reaches our starting point
- frame1 must be N levels down from there. */
- while (frame2 != frame)
- {
- frame1 = get_prev_frame (frame1);
- frame2 = get_prev_frame (frame2);
- }
- return frame1;
+ while (*level_offset_ptr < 0) {
+ frame1 = get_next_frame (frame);
+ if (!frame1)
+ break;
+ frame = frame1;
+ (*level_offset_ptr)++;
+ }
}
return frame;
}
-/* The "frame" command. With no arg, print selected frame briefly.
- With arg LEVEL, select the frame at level LEVEL and print it.
- With arg larger than 100000, use it as address of frame to select.
- If from command file or user-defined command, don't print anything
- if we have an argument. */
+/* 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
-frame_command (level_exp, from_tty)
+select_frame_command (level_exp, from_tty)
char *level_exp;
int from_tty;
{
- register int i;
- register FRAME frame;
- unsigned int level, level1;
+ register FRAME frame, frame1;
+ unsigned int level = 0;
- if (level_exp)
- {
- level1 = level = parse_and_eval_address (level_exp);
- if (level > 100000)
- {
- select_frame (level, -1);
- frame_info (0);
- return;
- }
+ if (!target_has_stack)
+ error ("No stack.");
- frame = find_relative_frame (get_current_frame (), &level1);
- if (level1 != 0)
- error ("Stack level %d is out of range.", level);
- select_frame (frame, level);
- if (! from_tty)
- return;
- }
+ 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. */
+
+static void
+frame_command (level_exp, from_tty)
+ char *level_exp;
+ int from_tty;
+{
+ select_frame_command (level_exp, from_tty);
print_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_command (count_exp)
+up_silently_command (count_exp, from_tty)
char *count_exp;
+ int from_tty;
{
register FRAME frame;
int count = 1, count1;
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)
error ("Initial frame selected; you cannot go up.");
select_frame (frame, selected_frame_level + count - count1);
+}
+static void
+up_command (count_exp, from_tty)
+ char *count_exp;
+ int from_tty;
+{
+ up_silently_command (count_exp, from_tty);
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_command (count_exp)
+down_silently_command (count_exp, from_tty)
char *count_exp;
+ int from_tty;
{
register FRAME frame;
int count = -1, count1;
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)
- error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
+ {
+
+ /* 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);
+}
+
+static void
+down_command (count_exp, from_tty)
+ char *count_exp;
+ int from_tty;
+{
+ down_silently_command (count_exp, from_tty);
print_stack_frame (selected_frame, selected_frame_level, 1);
}
\f
char *retval_exp;
int from_tty;
{
- struct symbol *thisfun = get_frame_function (selected_frame);
+ struct symbol *thisfun;
+ FRAME_ADDR selected_frame_addr;
+ CORE_ADDR selected_frame_pc;
+ FRAME frame;
+ value 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 = (get_frame_info (selected_frame))->pc;
+
+ /* Compute the return value (if any -- possibly getting errors here). */
+
+ if (retval_exp)
+ {
+ return_value = parse_and_eval (retval_exp);
+
+ /* 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 (thisfun != 0)
{
- if (!query ("Make %s return now? ", SYMBOL_NAME (thisfun)))
- error ("Not confirmed.");
+ 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. */
+ /* 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 != get_current_frame ())
+ while ( selected_frame_addr != FRAME_FP (frame = get_current_frame())
+ || selected_frame_pc != (get_frame_info (frame))->pc )
POP_FRAME;
/* Then pop that frame. */
for return values. */
if (retval_exp)
- set_return_value (parse_and_eval (retval_exp));
+ set_return_value (return_value);
/* If interactive, print the frame that is now current. */
if (from_tty)
frame_command ("0", 1);
}
+
+/* Gets the language of the current frame. */
+enum language
+get_frame_language()
+{
+ register struct symtab *s;
+ FRAME fr;
+ enum language flang; /* The language of the current frame */
+
+ fr = get_frame_info(selected_frame);
+ if(fr)
+ {
+ s = find_pc_symtab(fr->pc);
+ if(s)
+ flang = s->language;
+ else
+ flang = language_unknown;
+ }
+ else
+ flang = language_unknown;
+
+ return flang;
+}
\f
-static
-initialize ()
+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\
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\
add_com_alias ("f", "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.");
+ "Print backtrace of all stack frames, or innermost COUNT frames.\n\
+With a negative argument, print outermost -COUNT frames.");
add_com_alias ("bt", "backtrace", class_stack, 0);
add_com_alias ("where", "backtrace", class_alias, 0);
add_info ("stack", backtrace_command,
"Local variables of current stack frame.");
add_info ("args", args_info,
"Argument variables of current stack frame.");
+ 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
}
-
-END_FILE
projects / binutils.git / blobdiff