2086 lines
57 KiB
C
2086 lines
57 KiB
C
/* Print and select stack frames for GDB, the GNU debugger.
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Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
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1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <ctype.h>
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#include "defs.h"
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#include "gdb_string.h"
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#include "value.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "language.h"
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#include "frame.h"
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#include "gdbcmd.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "breakpoint.h"
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#include "demangle.h"
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#include "inferior.h"
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#include "annotate.h"
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#ifdef UI_OUT
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#include "ui-out.h"
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#endif
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/* Prototypes for exported functions. */
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void args_info (char *, int);
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void locals_info (char *, int);
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void (*selected_frame_level_changed_hook) (int);
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void _initialize_stack (void);
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/* Prototypes for local functions. */
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static void return_command (char *, int);
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static void down_command (char *, int);
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static void down_silently_base (char *);
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static void down_silently_command (char *, int);
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static void up_command (char *, int);
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static void up_silently_base (char *);
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static void up_silently_command (char *, int);
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void frame_command (char *, int);
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static void current_frame_command (char *, int);
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static void select_frame_command (char *, int);
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static void print_frame_arg_vars (struct frame_info *, struct ui_file *);
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static void catch_info (char *, int);
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static void args_plus_locals_info (char *, int);
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static void print_frame_label_vars (struct frame_info *, int,
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struct ui_file *);
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static void print_frame_local_vars (struct frame_info *, int,
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struct ui_file *);
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static int print_block_frame_labels (struct block *, int *,
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struct ui_file *);
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static int print_block_frame_locals (struct block *,
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struct frame_info *,
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int,
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struct ui_file *);
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static void print_frame (struct frame_info *fi,
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int level,
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int source,
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int args,
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struct symtab_and_line sal);
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static void print_frame_info_base (struct frame_info *, int, int, int);
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static void print_stack_frame_base (struct frame_info *, int, int);
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static void backtrace_command (char *, int);
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struct frame_info *parse_frame_specification (char *);
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static void frame_info (char *, int);
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extern int addressprint; /* Print addresses, or stay symbolic only? */
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extern int info_verbose; /* Verbosity of symbol reading msgs */
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extern int lines_to_list; /* # of lines "list" command shows by default */
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/* The "selected" stack frame is used by default for local and arg access.
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May be zero, for no selected frame. */
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struct frame_info *selected_frame;
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/* Level of the selected frame:
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0 for innermost, 1 for its caller, ...
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or -1 for frame specified by address with no defined level. */
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int selected_frame_level;
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/* Zero means do things normally; we are interacting directly with the
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user. One means print the full filename and linenumber when a
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frame is printed, and do so in a format emacs18/emacs19.22 can
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parse. Two means print similar annotations, but in many more
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cases and in a slightly different syntax. */
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int annotation_level = 0;
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struct print_stack_frame_args
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{
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struct frame_info *fi;
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int level;
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int source;
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int args;
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};
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static int print_stack_frame_base_stub (char *);
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/* Show and print the frame arguments.
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Pass the args the way catch_errors wants them. */
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static int show_and_print_stack_frame_stub (void *args);
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static int
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show_and_print_stack_frame_stub (void *args)
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{
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struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
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/* Reversed order of these so tuiDo() doesn't occur
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* in the middle of "Breakpoint 1 ... [location]" printing = RT
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*/
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if (tui_version)
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print_frame_info_base (p->fi, p->level, p->source, p->args);
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print_frame_info (p->fi, p->level, p->source, p->args);
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return 0;
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}
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/* Show or print the frame arguments.
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Pass the args the way catch_errors wants them. */
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static int print_stack_frame_stub (void *args);
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static int
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print_stack_frame_stub (void *args)
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{
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struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
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if (tui_version)
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print_frame_info (p->fi, p->level, p->source, p->args);
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else
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print_frame_info_base (p->fi, p->level, p->source, p->args);
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return 0;
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}
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/* Print a stack frame briefly. FRAME_INFI should be the frame info
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and LEVEL should be its level in the stack (or -1 for level not
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defined). */
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/* Pass the args the way catch_errors wants them. */
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static int
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print_stack_frame_base_stub (char *args)
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{
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struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
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print_frame_info_base (p->fi, p->level, p->source, p->args);
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return 0;
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}
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/* print the frame arguments to the terminal.
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Pass the args the way catch_errors wants them. */
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static int print_only_stack_frame_stub (void *);
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static int
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print_only_stack_frame_stub (void *args)
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{
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struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
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print_frame_info_base (p->fi, p->level, p->source, p->args);
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return 0;
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}
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/* Print a stack frame briefly. FRAME_INFI should be the frame info
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and LEVEL should be its level in the stack (or -1 for level not defined).
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This prints the level, the function executing, the arguments,
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and the file name and line number.
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If the pc is not at the beginning of the source line,
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the actual pc is printed at the beginning.
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If SOURCE is 1, print the source line as well.
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If SOURCE is -1, print ONLY the source line. */
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static void
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print_stack_frame_base (struct frame_info *fi, int level, int source)
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{
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struct print_stack_frame_args args;
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args.fi = fi;
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args.level = level;
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args.source = source;
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args.args = 1;
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catch_errors (print_stack_frame_stub, &args, "", RETURN_MASK_ALL);
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}
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/* Show and print a stack frame briefly. FRAME_INFI should be the frame info
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and LEVEL should be its level in the stack (or -1 for level not defined).
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This prints the level, the function executing, the arguments,
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and the file name and line number.
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If the pc is not at the beginning of the source line,
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the actual pc is printed at the beginning.
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If SOURCE is 1, print the source line as well.
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If SOURCE is -1, print ONLY the source line. */
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void
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show_and_print_stack_frame (struct frame_info *fi, int level, int source)
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{
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struct print_stack_frame_args args;
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args.fi = fi;
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args.level = level;
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args.source = source;
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args.args = 1;
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catch_errors (show_and_print_stack_frame_stub, &args, "", RETURN_MASK_ALL);
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}
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/* Show or print a stack frame briefly. FRAME_INFI should be the frame info
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and LEVEL should be its level in the stack (or -1 for level not defined).
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This prints the level, the function executing, the arguments,
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and the file name and line number.
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If the pc is not at the beginning of the source line,
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the actual pc is printed at the beginning.
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If SOURCE is 1, print the source line as well.
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If SOURCE is -1, print ONLY the source line. */
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void
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print_stack_frame (struct frame_info *fi, int level, int source)
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{
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struct print_stack_frame_args args;
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args.fi = fi;
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args.level = level;
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args.source = source;
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args.args = 1;
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catch_errors (print_stack_frame_stub, (char *) &args, "", RETURN_MASK_ALL);
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}
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/* Print a stack frame briefly. FRAME_INFI should be the frame info
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and LEVEL should be its level in the stack (or -1 for level not defined).
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This prints the level, the function executing, the arguments,
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and the file name and line number.
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If the pc is not at the beginning of the source line,
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the actual pc is printed at the beginning.
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If SOURCE is 1, print the source line as well.
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If SOURCE is -1, print ONLY the source line. */
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void
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print_only_stack_frame (struct frame_info *fi, int level, int source)
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{
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struct print_stack_frame_args args;
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args.fi = fi;
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args.level = level;
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args.source = source;
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args.args = 1;
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catch_errors (print_only_stack_frame_stub, &args, "", RETURN_MASK_ALL);
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}
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struct print_args_args
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{
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struct symbol *func;
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struct frame_info *fi;
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struct ui_file *stream;
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};
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static int print_args_stub (PTR);
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/* Pass the args the way catch_errors wants them. */
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static int
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print_args_stub (PTR args)
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{
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int numargs;
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struct print_args_args *p = (struct print_args_args *) args;
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numargs = FRAME_NUM_ARGS (p->fi);
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print_frame_args (p->func, p->fi, numargs, p->stream);
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return 0;
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}
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/* Print information about a frame for frame "fi" at level "level".
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Used in "where" output, also used to emit breakpoint or step
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messages.
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LEVEL is the level of the frame, or -1 if it is the
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innermost frame but we don't want to print the level.
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The meaning of the SOURCE argument is:
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SRC_LINE: Print only source line
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LOCATION: Print only location
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LOC_AND_SRC: Print location and source line. */
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static void
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print_frame_info_base (struct frame_info *fi, int level, int source, int args)
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{
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struct symtab_and_line sal;
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int source_print;
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int location_print;
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#if 0
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char buf[MAX_REGISTER_RAW_SIZE];
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CORE_ADDR sp;
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/* On the 68k, this spends too much time in m68k_find_saved_regs. */
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/* Get the value of SP_REGNUM relative to the frame. */
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get_saved_register (buf, (int *) NULL, (CORE_ADDR *) NULL,
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FRAME_INFO_ID (fi), SP_REGNUM, (enum lval_type *) NULL);
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sp = extract_address (buf, REGISTER_RAW_SIZE (SP_REGNUM));
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/* This is not a perfect test, because if a function alloca's some
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memory, puts some code there, and then jumps into it, then the test
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will succeed even though there is no call dummy. Probably best is
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to check for a bp_call_dummy breakpoint. */
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if (PC_IN_CALL_DUMMY (fi->pc, sp, fi->frame))
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#else
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if (frame_in_dummy (fi))
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#endif
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{
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annotate_frame_begin (level == -1 ? 0 : level, fi->pc);
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/* Do this regardless of SOURCE because we don't have any source
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to list for this frame. */
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if (level >= 0)
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printf_filtered ("#%-2d ", level);
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annotate_function_call ();
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printf_filtered ("<function called from gdb>\n");
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annotate_frame_end ();
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return;
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}
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if (fi->signal_handler_caller)
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{
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annotate_frame_begin (level == -1 ? 0 : level, fi->pc);
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/* Do this regardless of SOURCE because we don't have any source
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to list for this frame. */
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if (level >= 0)
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printf_filtered ("#%-2d ", level);
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annotate_signal_handler_caller ();
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printf_filtered ("<signal handler called>\n");
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annotate_frame_end ();
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return;
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}
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/* If fi is not the innermost frame, that normally means that fi->pc
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points to *after* the call instruction, and we want to get the line
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containing the call, never the next line. But if the next frame is
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a signal_handler_caller or a dummy frame, then the next frame was
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not entered as the result of a call, and we want to get the line
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containing fi->pc. */
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sal =
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find_pc_line (fi->pc,
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fi->next != NULL
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&& !fi->next->signal_handler_caller
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&& !frame_in_dummy (fi->next));
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location_print = (source == LOCATION
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|| source == LOC_AND_ADDRESS
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|| source == SRC_AND_LOC);
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if (location_print || !sal.symtab)
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print_frame (fi, level, source, args, sal);
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source_print = (source == SRC_LINE || source == SRC_AND_LOC);
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if (source_print && sal.symtab)
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{
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int done = 0;
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int mid_statement = (source == SRC_LINE) && (fi->pc != sal.pc);
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if (annotation_level)
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done = identify_source_line (sal.symtab, sal.line, mid_statement,
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fi->pc);
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if (!done)
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{
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if (addressprint && mid_statement && !tui_version)
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{
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#ifdef UI_OUT
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ui_out_field_core_addr (uiout, "addr", fi->pc);
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ui_out_text (uiout, "\t");
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#else
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print_address_numeric (fi->pc, 1, gdb_stdout);
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printf_filtered ("\t");
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#endif
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}
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if (print_frame_info_listing_hook)
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print_frame_info_listing_hook (sal.symtab, sal.line, sal.line + 1, 0);
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else if (!tui_version)
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print_source_lines (sal.symtab, sal.line, sal.line + 1, 0);
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}
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current_source_line = max (sal.line - lines_to_list / 2, 1);
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||
}
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||
|
||
if (source != 0)
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||
set_default_breakpoint (1, fi->pc, sal.symtab, sal.line);
|
||
|
||
annotate_frame_end ();
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||
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
|
||
static void
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||
print_frame (struct frame_info *fi,
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||
int level,
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||
int source,
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||
int args,
|
||
struct symtab_and_line sal)
|
||
{
|
||
struct symbol *func;
|
||
register char *funname = 0;
|
||
enum language funlang = language_unknown;
|
||
#ifdef UI_OUT
|
||
struct ui_stream *stb;
|
||
struct cleanup *old_chain;
|
||
struct cleanup *list_chain;
|
||
|
||
stb = ui_out_stream_new (uiout);
|
||
old_chain = make_cleanup_ui_out_stream_delete (stb);
|
||
#endif /* UI_OUT */
|
||
|
||
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. (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);
|
||
}
|
||
}
|
||
|
||
annotate_frame_begin (level == -1 ? 0 : level, fi->pc);
|
||
|
||
#ifdef UI_OUT
|
||
list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
|
||
#endif
|
||
|
||
if (level >= 0)
|
||
{
|
||
#ifdef UI_OUT
|
||
ui_out_text (uiout, "#");
|
||
ui_out_field_fmt (uiout, "level", "%-2d", level);
|
||
ui_out_spaces (uiout, 1);
|
||
#else
|
||
printf_filtered ("#%-2d ", level);
|
||
#endif
|
||
}
|
||
if (addressprint)
|
||
if (fi->pc != sal.pc || !sal.symtab || source == LOC_AND_ADDRESS)
|
||
{
|
||
annotate_frame_address ();
|
||
#ifdef UI_OUT
|
||
ui_out_field_core_addr (uiout, "addr", fi->pc);
|
||
annotate_frame_address_end ();
|
||
ui_out_text (uiout, " in ");
|
||
#else
|
||
print_address_numeric (fi->pc, 1, gdb_stdout);
|
||
annotate_frame_address_end ();
|
||
printf_filtered (" in ");
|
||
#endif
|
||
}
|
||
annotate_frame_function_name ();
|
||
#ifdef UI_OUT
|
||
fprintf_symbol_filtered (stb->stream, funname ? funname : "??", funlang,
|
||
DMGL_ANSI);
|
||
ui_out_field_stream (uiout, "func", stb);
|
||
ui_out_wrap_hint (uiout, " ");
|
||
#else
|
||
fprintf_symbol_filtered (gdb_stdout, funname ? funname : "??", funlang,
|
||
DMGL_ANSI);
|
||
wrap_here (" ");
|
||
#endif
|
||
annotate_frame_args ();
|
||
|
||
#ifdef UI_OUT
|
||
ui_out_text (uiout, " (");
|
||
#else
|
||
fputs_filtered (" (", gdb_stdout);
|
||
#endif
|
||
if (args)
|
||
{
|
||
struct print_args_args args;
|
||
#ifdef UI_OUT
|
||
struct cleanup *args_list_chain;
|
||
#endif
|
||
args.fi = fi;
|
||
args.func = func;
|
||
args.stream = gdb_stdout;
|
||
#ifdef UI_OUT
|
||
args_list_chain = make_cleanup_ui_out_list_begin_end (uiout, "args");
|
||
catch_errors (print_args_stub, &args, "", RETURN_MASK_ALL);
|
||
/* FIXME: args must be a list. If one argument is a string it will
|
||
have " that will not be properly escaped. */
|
||
/* Invoke ui_out_tuple_end. */
|
||
do_cleanups (args_list_chain);
|
||
#else
|
||
catch_errors (print_args_stub, &args, "", RETURN_MASK_ALL);
|
||
#endif
|
||
QUIT;
|
||
}
|
||
#ifdef UI_OUT
|
||
ui_out_text (uiout, ")");
|
||
#else
|
||
printf_filtered (")");
|
||
#endif
|
||
if (sal.symtab && sal.symtab->filename)
|
||
{
|
||
annotate_frame_source_begin ();
|
||
#ifdef UI_OUT
|
||
ui_out_wrap_hint (uiout, " ");
|
||
ui_out_text (uiout, " at ");
|
||
annotate_frame_source_file ();
|
||
ui_out_field_string (uiout, "file", sal.symtab->filename);
|
||
annotate_frame_source_file_end ();
|
||
ui_out_text (uiout, ":");
|
||
annotate_frame_source_line ();
|
||
ui_out_field_int (uiout, "line", sal.line);
|
||
#else
|
||
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);
|
||
#endif
|
||
annotate_frame_source_end ();
|
||
}
|
||
|
||
#ifdef PC_SOLIB
|
||
if (!funname || (!sal.symtab || !sal.symtab->filename))
|
||
{
|
||
char *lib = PC_SOLIB (fi->pc);
|
||
if (lib)
|
||
{
|
||
annotate_frame_where ();
|
||
#ifdef UI_OUT
|
||
ui_out_wrap_hint (uiout, " ");
|
||
ui_out_text (uiout, " from ");
|
||
ui_out_field_string (uiout, "from", lib);
|
||
#else
|
||
wrap_here (" ");
|
||
printf_filtered (" from %s", lib);
|
||
#endif
|
||
}
|
||
}
|
||
#endif /* PC_SOLIB */
|
||
|
||
#ifdef UI_OUT
|
||
/* do_cleanups will call ui_out_tuple_end() for us. */
|
||
do_cleanups (list_chain);
|
||
ui_out_text (uiout, "\n");
|
||
do_cleanups (old_chain);
|
||
#else
|
||
printf_filtered ("\n");
|
||
#endif
|
||
}
|
||
|
||
|
||
#if 0
|
||
void
|
||
stack_publish_stopped_with_no_frame (void)
|
||
{
|
||
TUIDO (((TuiOpaqueFuncPtr) tuiUpdateOnEnd));
|
||
|
||
return;
|
||
}
|
||
#endif
|
||
|
||
/* Show or print the frame info. If this is the tui, it will be shown in
|
||
the source display */
|
||
void
|
||
print_frame_info (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 (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 (char *frame_exp)
|
||
{
|
||
int numargs = 0;
|
||
#define MAXARGS 4
|
||
CORE_ADDR args[MAXARGS];
|
||
int level;
|
||
|
||
if (frame_exp)
|
||
{
|
||
char *addr_string, *p;
|
||
struct cleanup *tmp_cleanup;
|
||
|
||
while (*frame_exp == ' ')
|
||
frame_exp++;
|
||
|
||
while (*frame_exp)
|
||
{
|
||
if (numargs > MAXARGS)
|
||
error ("Too many args in frame specification");
|
||
/* Parse an argument. */
|
||
for (p = frame_exp; *p && *p != ' '; p++)
|
||
;
|
||
addr_string = savestring (frame_exp, p - frame_exp);
|
||
|
||
{
|
||
value_ptr vp;
|
||
|
||
tmp_cleanup = make_cleanup (xfree, addr_string);
|
||
|
||
/* NOTE: we call parse_and_eval and then both
|
||
value_as_long and value_as_pointer rather than calling
|
||
parse_and_eval_long and parse_and_eval_address because
|
||
of the issue of potential side effects from evaluating
|
||
the expression. */
|
||
vp = parse_and_eval (addr_string);
|
||
if (numargs == 0)
|
||
level = value_as_long (vp);
|
||
|
||
args[numargs++] = value_as_pointer (vp);
|
||
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:
|
||
{
|
||
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 (char *addr_exp, int from_tty)
|
||
{
|
||
struct frame_info *fi;
|
||
struct symtab_and_line sal;
|
||
struct symbol *func;
|
||
struct symtab *s;
|
||
struct frame_info *calling_frame_info;
|
||
int i, count, numregs;
|
||
char *funname = 0;
|
||
enum language funlang = language_unknown;
|
||
|
||
if (!target_has_stack)
|
||
error ("No stack.");
|
||
|
||
fi = parse_frame_specification (addr_exp);
|
||
if (fi == NULL)
|
||
error ("Invalid frame specified.");
|
||
|
||
sal = find_pc_line (fi->pc,
|
||
fi->next != NULL
|
||
&& !fi->next->signal_handler_caller
|
||
&& !frame_in_dummy (fi->next));
|
||
func = get_frame_function (fi);
|
||
s = find_pc_symtab (fi->pc);
|
||
if (func)
|
||
{
|
||
/* I'd like to use SYMBOL_SOURCE_NAME() here, to display
|
||
* the demangled name that we already have stored in
|
||
* the symbol table, but we stored a version with
|
||
* DMGL_PARAMS turned on, and here we don't want
|
||
* to display parameters. So call the demangler again,
|
||
* with DMGL_ANSI only. RT
|
||
* (Yes, I know that printf_symbol_filtered() will
|
||
* again try to demangle the name on the fly, but
|
||
* the issue is that if cplus_demangle() fails here,
|
||
* it'll fail there too. So we want to catch the failure
|
||
* ("demangled==NULL" case below) here, while we still
|
||
* have our hands on the function symbol.)
|
||
*/
|
||
char *demangled;
|
||
funname = SYMBOL_NAME (func);
|
||
funlang = SYMBOL_LANGUAGE (func);
|
||
if (funlang == language_cplus)
|
||
{
|
||
demangled = cplus_demangle (funname, DMGL_ANSI);
|
||
/* If the demangler fails, try the demangled name
|
||
* from the symbol table. This'll have parameters,
|
||
* but that's preferable to diplaying a mangled name.
|
||
*/
|
||
if (demangled == NULL)
|
||
funname = SYMBOL_SOURCE_NAME (func);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
register struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc);
|
||
if (msymbol != NULL)
|
||
{
|
||
funname = SYMBOL_NAME (msymbol);
|
||
funlang = SYMBOL_LANGUAGE (msymbol);
|
||
}
|
||
}
|
||
calling_frame_info = get_prev_frame (fi);
|
||
|
||
if (!addr_exp && selected_frame_level >= 0)
|
||
{
|
||
printf_filtered ("Stack level %d, frame at ", selected_frame_level);
|
||
print_address_numeric (fi->frame, 1, gdb_stdout);
|
||
printf_filtered (":\n");
|
||
}
|
||
else
|
||
{
|
||
printf_filtered ("Stack frame at ");
|
||
print_address_numeric (fi->frame, 1, gdb_stdout);
|
||
printf_filtered (":\n");
|
||
}
|
||
printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM));
|
||
print_address_numeric (fi->pc, 1, gdb_stdout);
|
||
|
||
wrap_here (" ");
|
||
if (funname)
|
||
{
|
||
printf_filtered (" in ");
|
||
fprintf_symbol_filtered (gdb_stdout, funname, funlang,
|
||
DMGL_ANSI | DMGL_PARAMS);
|
||
}
|
||
wrap_here (" ");
|
||
if (sal.symtab)
|
||
printf_filtered (" (%s:%d)", sal.symtab->filename, sal.line);
|
||
puts_filtered ("; ");
|
||
wrap_here (" ");
|
||
printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM));
|
||
print_address_numeric (FRAME_SAVED_PC (fi), 1, gdb_stdout);
|
||
printf_filtered ("\n");
|
||
|
||
{
|
||
int frameless;
|
||
frameless = FRAMELESS_FUNCTION_INVOCATION (fi);
|
||
if (frameless)
|
||
printf_filtered (" (FRAMELESS),");
|
||
}
|
||
|
||
if (calling_frame_info)
|
||
{
|
||
printf_filtered (" called by frame at ");
|
||
print_address_numeric (calling_frame_info->frame, 1, gdb_stdout);
|
||
}
|
||
if (fi->next && calling_frame_info)
|
||
puts_filtered (",");
|
||
wrap_here (" ");
|
||
if (fi->next)
|
||
{
|
||
printf_filtered (" caller of frame at ");
|
||
print_address_numeric (fi->next->frame, 1, gdb_stdout);
|
||
}
|
||
if (fi->next || calling_frame_info)
|
||
puts_filtered ("\n");
|
||
if (s)
|
||
printf_filtered (" source language %s.\n", language_str (s->language));
|
||
|
||
#ifdef PRINT_EXTRA_FRAME_INFO
|
||
PRINT_EXTRA_FRAME_INFO (fi);
|
||
#endif
|
||
|
||
{
|
||
/* Address of the argument list for this frame, or 0. */
|
||
CORE_ADDR arg_list = FRAME_ARGS_ADDRESS_CORRECT (fi);
|
||
/* Number of args for this frame, or -1 if unknown. */
|
||
int numargs;
|
||
|
||
if (arg_list == 0)
|
||
printf_filtered (" Arglist at unknown address.\n");
|
||
else
|
||
{
|
||
printf_filtered (" Arglist at ");
|
||
print_address_numeric (arg_list, 1, gdb_stdout);
|
||
printf_filtered (",");
|
||
|
||
numargs = FRAME_NUM_ARGS (fi);
|
||
if (numargs < 0)
|
||
puts_filtered (" args: ");
|
||
else if (numargs == 0)
|
||
puts_filtered (" no args.");
|
||
else if (numargs == 1)
|
||
puts_filtered (" 1 arg: ");
|
||
else
|
||
printf_filtered (" %d args: ", numargs);
|
||
print_frame_args (func, fi, numargs, gdb_stdout);
|
||
puts_filtered ("\n");
|
||
}
|
||
}
|
||
{
|
||
/* Address of the local variables for this frame, or 0. */
|
||
CORE_ADDR arg_list = FRAME_LOCALS_ADDRESS (fi);
|
||
|
||
if (arg_list == 0)
|
||
printf_filtered (" Locals at unknown address,");
|
||
else
|
||
{
|
||
printf_filtered (" Locals at ");
|
||
print_address_numeric (arg_list, 1, gdb_stdout);
|
||
printf_filtered (",");
|
||
}
|
||
}
|
||
|
||
FRAME_INIT_SAVED_REGS (fi);
|
||
if (fi->saved_regs != NULL)
|
||
{
|
||
/* The sp is special; what's returned isn't the save address, but
|
||
actually the value of the previous frame's sp. */
|
||
printf_filtered (" Previous frame's sp is ");
|
||
print_address_numeric (fi->saved_regs[SP_REGNUM], 1, gdb_stdout);
|
||
printf_filtered ("\n");
|
||
count = 0;
|
||
numregs = NUM_REGS + NUM_PSEUDO_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 (char *count_exp, int from_tty)
|
||
{
|
||
int count = parse_and_eval_long (count_exp);
|
||
|
||
if (count < 0)
|
||
error ("Negative argument not meaningful as backtrace limit.");
|
||
|
||
backtrace_limit = count;
|
||
}
|
||
|
||
static void
|
||
backtrace_limit_info (char *arg, int from_tty)
|
||
{
|
||
if (arg)
|
||
error ("\"Info backtrace-limit\" takes no arguments.");
|
||
|
||
printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit);
|
||
}
|
||
#endif
|
||
|
||
/* Print briefly all stack frames or just the innermost COUNT frames. */
|
||
|
||
static void backtrace_command_1 (char *count_exp, int show_locals,
|
||
int from_tty);
|
||
static void
|
||
backtrace_command_1 (char *count_exp, int show_locals, int from_tty)
|
||
{
|
||
struct frame_info *fi;
|
||
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 ();
|
||
|
||
/* The target can be in a state where there is no valid frames
|
||
(e.g., just connected). */
|
||
if (trailing == NULL)
|
||
error ("No stack.");
|
||
|
||
trailing_level = 0;
|
||
if (count_exp)
|
||
{
|
||
count = parse_and_eval_long (count_exp);
|
||
if (count < 0)
|
||
{
|
||
struct frame_info *current;
|
||
|
||
count = -count;
|
||
|
||
current = trailing;
|
||
while (current && count--)
|
||
{
|
||
QUIT;
|
||
current = get_prev_frame (current);
|
||
}
|
||
|
||
/* Will stop when CURRENT reaches the top of the stack. TRAILING
|
||
will be COUNT below it. */
|
||
while (current)
|
||
{
|
||
QUIT;
|
||
trailing = get_prev_frame (trailing);
|
||
current = get_prev_frame (current);
|
||
trailing_level++;
|
||
}
|
||
|
||
count = -1;
|
||
}
|
||
}
|
||
else
|
||
count = -1;
|
||
|
||
if (info_verbose)
|
||
{
|
||
struct partial_symtab *ps;
|
||
|
||
/* Read in symbols for all of the frames. Need to do this in
|
||
a separate pass so that "Reading in symbols for xxx" messages
|
||
don't screw up the appearance of the backtrace. Also
|
||
if people have strong opinions against reading symbols for
|
||
backtrace this may have to be an option. */
|
||
i = count;
|
||
for (fi = trailing;
|
||
fi != NULL && i--;
|
||
fi = get_prev_frame (fi))
|
||
{
|
||
QUIT;
|
||
ps = find_pc_psymtab (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 (char *arg, int from_tty)
|
||
{
|
||
struct cleanup *old_chain = (struct cleanup *) NULL;
|
||
char **argv = (char **) NULL;
|
||
int argIndicatingFullTrace = (-1), totArgLen = 0, argc = 0;
|
||
char *argPtr = arg;
|
||
|
||
if (arg != (char *) NULL)
|
||
{
|
||
int i;
|
||
|
||
argv = buildargv (arg);
|
||
old_chain = make_cleanup_freeargv (argv);
|
||
argc = 0;
|
||
for (i = 0; (argv[i] != (char *) NULL); i++)
|
||
{
|
||
unsigned int j;
|
||
|
||
for (j = 0; (j < strlen (argv[i])); j++)
|
||
argv[i][j] = tolower (argv[i][j]);
|
||
|
||
if (argIndicatingFullTrace < 0 && subset_compare (argv[i], "full"))
|
||
argIndicatingFullTrace = argc;
|
||
else
|
||
{
|
||
argc++;
|
||
totArgLen += strlen (argv[i]);
|
||
}
|
||
}
|
||
totArgLen += argc;
|
||
if (argIndicatingFullTrace >= 0)
|
||
{
|
||
if (totArgLen > 0)
|
||
{
|
||
argPtr = (char *) xmalloc (totArgLen + 1);
|
||
if (!argPtr)
|
||
nomem (0);
|
||
else
|
||
{
|
||
memset (argPtr, 0, totArgLen + 1);
|
||
for (i = 0; (i < (argc + 1)); i++)
|
||
{
|
||
if (i != argIndicatingFullTrace)
|
||
{
|
||
strcat (argPtr, argv[i]);
|
||
strcat (argPtr, " ");
|
||
}
|
||
}
|
||
}
|
||
}
|
||
else
|
||
argPtr = (char *) NULL;
|
||
}
|
||
}
|
||
|
||
backtrace_command_1 (argPtr, (argIndicatingFullTrace >= 0), from_tty);
|
||
|
||
if (argIndicatingFullTrace >= 0 && totArgLen > 0)
|
||
xfree (argPtr);
|
||
|
||
if (old_chain)
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
static void backtrace_full_command (char *arg, int from_tty);
|
||
static void
|
||
backtrace_full_command (char *arg, int from_tty)
|
||
{
|
||
backtrace_command_1 (arg, 1, from_tty);
|
||
}
|
||
|
||
|
||
/* Print the local variables of a block B active in FRAME.
|
||
Return 1 if any variables were printed; 0 otherwise. */
|
||
|
||
static int
|
||
print_block_frame_locals (struct block *b, register struct frame_info *fi,
|
||
int num_tabs, register struct ui_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 (struct block *b, int *have_default,
|
||
register struct ui_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 (register struct frame_info *fi, register int num_tabs,
|
||
register struct ui_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 (register struct frame_info *fi, int this_level_only,
|
||
register struct ui_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 (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 (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 (register struct frame_info *fi,
|
||
register struct ui_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 (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 (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 (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 (struct frame_info *fi, int level)
|
||
{
|
||
select_frame (fi, level);
|
||
if (fi)
|
||
{
|
||
print_stack_frame (fi, level, 1);
|
||
TUIDO (((TuiOpaqueFuncPtr) tui_vCheckDataValues, fi));
|
||
}
|
||
}
|
||
|
||
|
||
/* Select frame FI, noting that its stack level is LEVEL. Be silent if
|
||
not the TUI */
|
||
#if 0
|
||
void
|
||
select_and_maybe_print_frame (struct frame_info *fi, int level)
|
||
{
|
||
if (!tui_version)
|
||
select_frame (fi, level);
|
||
else
|
||
select_and_print_frame (fi, level);
|
||
}
|
||
#endif
|
||
|
||
|
||
/* Store the selected frame and its level into *FRAMEP and *LEVELP.
|
||
If there is no selected frame, *FRAMEP is set to NULL. */
|
||
|
||
void
|
||
record_selected_frame (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 (void)
|
||
{
|
||
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 (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 */
|
||
#ifdef UI_OUT
|
||
void
|
||
select_frame_command_wrapper (char *level_exp, int from_tty)
|
||
{
|
||
select_frame_command (level_exp, from_tty);
|
||
}
|
||
#endif
|
||
static void
|
||
select_frame_command (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 (char *level_exp, int from_tty)
|
||
{
|
||
select_frame_command (level_exp, from_tty);
|
||
show_and_print_stack_frame (selected_frame, selected_frame_level, 1);
|
||
}
|
||
|
||
/* The XDB Compatibility command to print the current frame. */
|
||
|
||
static void
|
||
current_frame_command (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 (char *count_exp)
|
||
{
|
||
register struct frame_info *fi;
|
||
int count = 1, count1;
|
||
if (count_exp)
|
||
count = parse_and_eval_long (count_exp);
|
||
count1 = count;
|
||
|
||
if (target_has_stack == 0 || 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 (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 (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 (char *count_exp)
|
||
{
|
||
register struct frame_info *frame;
|
||
int count = -1, count1;
|
||
if (count_exp)
|
||
count = -parse_and_eval_long (count_exp);
|
||
count1 = count;
|
||
|
||
if (target_has_stack == 0 || 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 (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 (char *count_exp, int from_tty)
|
||
{
|
||
down_silently_base (count_exp);
|
||
show_and_print_stack_frame (selected_frame, selected_frame_level, 1);
|
||
}
|
||
|
||
#ifdef UI_OUT
|
||
void
|
||
return_command_wrapper (char *retval_exp, int from_tty)
|
||
{
|
||
return_command (retval_exp, from_tty);
|
||
}
|
||
#endif
|
||
static void
|
||
return_command (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 we are at the end of a call dummy now, pop the dummy frame too. */
|
||
|
||
if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
|
||
FRAME_FP (get_current_frame ())))
|
||
POP_FRAME;
|
||
|
||
/* If interactive, print the frame that is now current. */
|
||
|
||
if (from_tty)
|
||
frame_command ("0", 1);
|
||
else
|
||
select_frame_command ("0", 0);
|
||
}
|
||
|
||
/* Sets the scope to input function name, provided that the
|
||
function is within the current stack frame */
|
||
|
||
struct function_bounds
|
||
{
|
||
CORE_ADDR low, high;
|
||
};
|
||
|
||
static void func_command (char *arg, int from_tty);
|
||
static void
|
||
func_command (char *arg, int from_tty)
|
||
{
|
||
struct frame_info *fp;
|
||
int found = 0;
|
||
struct symtabs_and_lines sals;
|
||
int i;
|
||
int level = 1;
|
||
struct function_bounds *func_bounds = (struct function_bounds *) NULL;
|
||
|
||
if (arg != (char *) NULL)
|
||
return;
|
||
|
||
fp = parse_frame_specification ("0");
|
||
sals = decode_line_spec (arg, 1);
|
||
func_bounds = (struct function_bounds *) xmalloc (
|
||
sizeof (struct function_bounds) * sals.nelts);
|
||
for (i = 0; (i < sals.nelts && !found); i++)
|
||
{
|
||
if (sals.sals[i].pc == (CORE_ADDR) 0 ||
|
||
find_pc_partial_function (sals.sals[i].pc,
|
||
(char **) NULL,
|
||
&func_bounds[i].low,
|
||
&func_bounds[i].high) == 0)
|
||
{
|
||
func_bounds[i].low =
|
||
func_bounds[i].high = (CORE_ADDR) NULL;
|
||
}
|
||
}
|
||
|
||
do
|
||
{
|
||
for (i = 0; (i < sals.nelts && !found); i++)
|
||
found = (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)
|
||
xfree (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 (void)
|
||
{
|
||
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 (void)
|
||
{
|
||
#if 0
|
||
backtrace_limit = 30;
|
||
#endif
|
||
|
||
add_com ("return", class_stack, return_command,
|
||
"Make selected stack frame return to its caller.\n\
|
||
Control remains in the debugger, but when you continue\n\
|
||
execution will resume in the frame above the one now selected.\n\
|
||
If an argument is given, it is an expression for the value to return.");
|
||
|
||
add_com ("up", class_stack, up_command,
|
||
"Select and print stack frame that called this one.\n\
|
||
An argument says how many frames up to go.");
|
||
add_com ("up-silently", class_support, up_silently_command,
|
||
"Same as the `up' command, but does not print anything.\n\
|
||
This is useful in command scripts.");
|
||
|
||
add_com ("down", class_stack, down_command,
|
||
"Select and print stack frame called by this one.\n\
|
||
An argument says how many frames down to go.");
|
||
add_com_alias ("do", "down", class_stack, 1);
|
||
add_com_alias ("dow", "down", class_stack, 1);
|
||
add_com ("down-silently", class_support, down_silently_command,
|
||
"Same as the `down' command, but does not print anything.\n\
|
||
This is useful in command scripts.");
|
||
|
||
add_com ("frame", class_stack, frame_command,
|
||
"Select and print a stack frame.\n\
|
||
With no argument, print the selected stack frame. (See also \"info frame\").\n\
|
||
An argument specifies the frame to select.\n\
|
||
It can be a stack frame number or the address of the frame.\n\
|
||
With argument, nothing is printed if input is coming from\n\
|
||
a command file or a user-defined command.");
|
||
|
||
add_com_alias ("f", "frame", class_stack, 1);
|
||
|
||
if (xdb_commands)
|
||
{
|
||
add_com ("L", class_stack, current_frame_command,
|
||
"Print the current stack frame.\n");
|
||
add_com_alias ("V", "frame", class_stack, 1);
|
||
}
|
||
add_com ("select-frame", class_stack, select_frame_command,
|
||
"Select a stack frame without printing anything.\n\
|
||
An argument specifies the frame to select.\n\
|
||
It can be a stack frame number or the address of the frame.\n");
|
||
|
||
add_com ("backtrace", class_stack, backtrace_command,
|
||
"Print backtrace of all stack frames, or innermost COUNT frames.\n\
|
||
With a negative argument, print outermost -COUNT frames.\n\
|
||
Use of the 'full' qualifier also prints the values of the local variables.\n");
|
||
add_com_alias ("bt", "backtrace", class_stack, 0);
|
||
if (xdb_commands)
|
||
{
|
||
add_com_alias ("t", "backtrace", class_stack, 0);
|
||
add_com ("T", class_stack, backtrace_full_command,
|
||
"Print backtrace of all stack frames, or innermost COUNT frames \n\
|
||
and the values of the local variables.\n\
|
||
With a negative argument, print outermost -COUNT frames.\n\
|
||
Usage: T <count>\n");
|
||
}
|
||
|
||
add_com_alias ("where", "backtrace", class_alias, 0);
|
||
add_info ("stack", backtrace_command,
|
||
"Backtrace of the stack, or innermost COUNT frames.");
|
||
add_info_alias ("s", "stack", 1);
|
||
add_info ("frame", frame_info,
|
||
"All about selected stack frame, or frame at ADDR.");
|
||
add_info_alias ("f", "frame", 1);
|
||
add_info ("locals", locals_info,
|
||
"Local variables of current stack frame.");
|
||
add_info ("args", args_info,
|
||
"Argument variables of current stack frame.");
|
||
if (xdb_commands)
|
||
add_com ("l", class_info, args_plus_locals_info,
|
||
"Argument and local variables of current stack frame.");
|
||
|
||
if (dbx_commands)
|
||
add_com ("func", class_stack, func_command,
|
||
"Select the stack frame that contains <func>.\nUsage: func <name>\n");
|
||
|
||
add_info ("catch", catch_info,
|
||
"Exceptions that can be caught in the current stack frame.");
|
||
|
||
#if 0
|
||
add_cmd ("backtrace-limit", class_stack, set_backtrace_limit_command,
|
||
"Specify maximum number of frames for \"backtrace\" to print by default.",
|
||
&setlist);
|
||
add_info ("backtrace-limit", backtrace_limit_info,
|
||
"The maximum number of frames for \"backtrace\" to print by default.");
|
||
#endif
|
||
}
|