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binutils-gdb/gdb/mi/mi-cmd-stack.c

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/* MI Command Set - stack commands.
Copyright 2000, 2002 Free Software Foundation, Inc.
Contributed by Cygnus Solutions (a Red Hat company).
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "target.h"
#include "frame.h"
#include "value.h"
#include "mi-cmds.h"
#include "ui-out.h"
#include "symtab.h"
/* FIXME: these should go in some .h file but stack.c doesn't have a
corresponding .h file. These wrappers will be obsolete anyway, once
we pull the plug on the sanitization. */
extern void select_frame_command_wrapper (char *, int);
static void list_args_or_locals (int locals, int values, struct frame_info *fi);
/* Print a list of the stack frames. Args can be none, in which case
we want to print the whole backtrace, or a pair of numbers
specifying the frame numbers at which to start and stop the
display. If the two numbers are equal, a single frame will be
displayed. */
enum mi_cmd_result
mi_cmd_stack_list_frames (char *command, char **argv, int argc)
{
int frame_low;
int frame_high;
int i;
struct frame_info *fi;
if (!target_has_stack)
error ("mi_cmd_stack_list_frames: No stack.");
if (argc > 2 || argc == 1)
error ("mi_cmd_stack_list_frames: Usage: [FRAME_LOW FRAME_HIGH]");
if (argc == 2)
{
frame_low = atoi (argv[0]);
frame_high = atoi (argv[1]);
}
else
{
/* Called with no arguments, it means we want the whole
backtrace. */
frame_low = -1;
frame_high = -1;
}
/* Let's position fi on the frame at which to start the
display. Could be the innermost frame if the whole stack needs
displaying, or if frame_low is 0. */
for (i = 0, fi = get_current_frame ();
fi && i < frame_low;
i++, fi = get_prev_frame (fi));
if (fi == NULL)
error ("mi_cmd_stack_list_frames: Not enough frames in stack.");
ui_out_list_begin (uiout, "stack");
/* Now let;s print the frames up to frame_high, or until there are
frames in the stack. */
for (;
fi && (i <= frame_high || frame_high == -1);
i++, fi = get_prev_frame (fi))
{
QUIT;
/* level == i: always print the level 'i'
source == LOC_AND_ADDRESS: print the location and the address
always, even for level 0.
args == 0: don't print the arguments. */
print_frame_info (fi /* frame info */ ,
i /* level */ ,
LOC_AND_ADDRESS /* source */ ,
0 /* args */ );
}
ui_out_list_end (uiout);
if (i < frame_high)
error ("mi_cmd_stack_list_frames: Not enough frames in stack.");
return MI_CMD_DONE;
}
enum mi_cmd_result
mi_cmd_stack_info_depth (char *command, char **argv, int argc)
{
int frame_high;
int i;
struct frame_info *fi;
if (!target_has_stack)
error ("mi_cmd_stack_info_depth: No stack.");
if (argc > 1)
error ("mi_cmd_stack_info_depth: Usage: [MAX_DEPTH]");
if (argc == 1)
frame_high = atoi (argv[0]);
else
/* Called with no arguments, it means we want the real depth of
the stack. */
frame_high = -1;
for (i = 0, fi = get_current_frame ();
fi && (i < frame_high || frame_high == -1);
i++, fi = get_prev_frame (fi))
QUIT;
ui_out_field_int (uiout, "depth", i);
return MI_CMD_DONE;
}
/* Print a list of the locals for the current frame. With argument of
0, print only the names, with argument of 1 print also the
values. */
enum mi_cmd_result
mi_cmd_stack_list_locals (char *command, char **argv, int argc)
{
if (argc != 1)
error ("mi_cmd_stack_list_locals: Usage: PRINT_VALUES");
list_args_or_locals (1, atoi (argv[0]), selected_frame);
return MI_CMD_DONE;
}
/* Print a list of the arguments for the current frame. With argument
of 0, print only the names, with argument of 1 print also the
values. */
enum mi_cmd_result
mi_cmd_stack_list_args (char *command, char **argv, int argc)
{
int frame_low;
int frame_high;
int i;
struct frame_info *fi;
if (argc < 1 || argc > 3 || argc == 2)
error ("mi_cmd_stack_list_args: Usage: PRINT_VALUES [FRAME_LOW FRAME_HIGH]");
if (argc == 3)
{
frame_low = atoi (argv[1]);
frame_high = atoi (argv[2]);
}
else
{
/* Called with no arguments, it means we want args for the whole
backtrace. */
frame_low = -1;
frame_high = -1;
}
/* Let's position fi on the frame at which to start the
display. Could be the innermost frame if the whole stack needs
displaying, or if frame_low is 0. */
for (i = 0, fi = get_current_frame ();
fi && i < frame_low;
i++, fi = get_prev_frame (fi));
if (fi == NULL)
error ("mi_cmd_stack_list_args: Not enough frames in stack.");
ui_out_list_begin (uiout, "stack-args");
/* Now let's print the frames up to frame_high, or until there are
frames in the stack. */
for (;
fi && (i <= frame_high || frame_high == -1);
i++, fi = get_prev_frame (fi))
{
QUIT;
ui_out_tuple_begin (uiout, "frame");
ui_out_field_int (uiout, "level", i);
list_args_or_locals (0, atoi (argv[0]), fi);
ui_out_tuple_end (uiout);
}
ui_out_list_end (uiout);
if (i < frame_high)
error ("mi_cmd_stack_list_args: Not enough frames in stack.");
return MI_CMD_DONE;
}
/* Print a list of the locals or the arguments for the currently
selected frame. If the argument passed is 0, printonly the names
of the variables, if an argument of 1 is passed, print the values
as well. */
static void
list_args_or_locals (int locals, int values, struct frame_info *fi)
{
struct block *block;
struct symbol *sym;
int i, nsyms;
static struct ui_stream *stb = NULL;
stb = ui_out_stream_new (uiout);
block = get_frame_block (fi);
ui_out_list_begin (uiout, locals ? "locals" : "args");
while (block != 0)
{
ALL_BLOCK_SYMBOLS (block, i, sym)
{
int print_me = 0;
switch (SYMBOL_CLASS (sym))
{
default:
case LOC_UNDEF: /* catches errors */
case LOC_CONST: /* constant */
case LOC_TYPEDEF: /* local typedef */
case LOC_LABEL: /* local label */
case LOC_BLOCK: /* local function */
case LOC_CONST_BYTES: /* loc. byte seq. */
case LOC_UNRESOLVED: /* unresolved static */
case LOC_OPTIMIZED_OUT: /* optimized out */
print_me = 0;
break;
case LOC_ARG: /* argument */
case LOC_REF_ARG: /* reference arg */
case LOC_REGPARM: /* register arg */
case LOC_REGPARM_ADDR: /* indirect register arg */
case LOC_LOCAL_ARG: /* stack arg */
case LOC_BASEREG_ARG: /* basereg arg */
if (!locals)
print_me = 1;
break;
case LOC_LOCAL: /* stack local */
case LOC_BASEREG: /* basereg local */
case LOC_STATIC: /* static */
case LOC_REGISTER: /* register */
if (locals)
print_me = 1;
break;
}
if (print_me)
{
if (values)
ui_out_tuple_begin (uiout, NULL);
ui_out_field_string (uiout, "name", SYMBOL_NAME (sym));
if (values)
{
struct symbol *sym2;
if (!locals)
sym2 = lookup_symbol (SYMBOL_NAME (sym),
block, VAR_NAMESPACE,
(int *) NULL,
(struct symtab **) NULL);
else
sym2 = sym;
print_variable_value (sym2, fi, stb->stream);
ui_out_field_stream (uiout, "value", stb);
ui_out_tuple_end (uiout);
}
}
}
if (BLOCK_FUNCTION (block))
break;
else
block = BLOCK_SUPERBLOCK (block);
}
ui_out_list_end (uiout);
ui_out_stream_delete (stb);
}
enum mi_cmd_result
mi_cmd_stack_select_frame (char *command, char **argv, int argc)
{
if (!target_has_stack)
error ("mi_cmd_stack_select_frame: No stack.");
if (argc > 1)
error ("mi_cmd_stack_select_frame: Usage: [FRAME_SPEC]");
/* with no args, don't change frame */
if (argc == 0)
select_frame_command_wrapper (0, 1 /* not used */ );
else
select_frame_command_wrapper (argv[0], 1 /* not used */ );
return MI_CMD_DONE;
}
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