645 lines
17 KiB
C
645 lines
17 KiB
C
/* MI Command Set - stack commands.
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Copyright (C) 2000-2013 Free Software Foundation, Inc.
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Contributed by Cygnus Solutions (a Red Hat company).
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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 3 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, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "target.h"
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#include "frame.h"
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#include "value.h"
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#include "mi-cmds.h"
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#include "ui-out.h"
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#include "symtab.h"
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#include "block.h"
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#include "stack.h"
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#include "dictionary.h"
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#include "gdb_string.h"
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#include "language.h"
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#include "valprint.h"
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#include "exceptions.h"
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#include "utils.h"
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#include "mi-getopt.h"
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#include "python/python.h"
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#include <ctype.h>
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#include "mi-parse.h"
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enum what_to_list { locals, arguments, all };
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static void list_args_or_locals (enum what_to_list what,
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enum print_values values,
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struct frame_info *fi);
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/* True if we want to allow Python-based frame filters. */
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static int frame_filters = 0;
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void
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mi_cmd_enable_frame_filters (char *command, char **argv, int argc)
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{
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if (argc != 0)
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error (_("-enable-frame-filters: no arguments allowed"));
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frame_filters = 1;
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}
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/* Parse the --no-frame-filters option in commands where we cannot use
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mi_getopt. */
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static int
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parse_no_frames_option (const char *arg)
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{
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if (arg && (strcmp (arg, "--no-frame-filters") == 0))
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return 1;
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return 0;
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}
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/* Print a list of the stack frames. Args can be none, in which case
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we want to print the whole backtrace, or a pair of numbers
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specifying the frame numbers at which to start and stop the
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display. If the two numbers are equal, a single frame will be
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displayed. */
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void
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mi_cmd_stack_list_frames (char *command, char **argv, int argc)
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{
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int frame_low;
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int frame_high;
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int i;
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struct cleanup *cleanup_stack;
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struct frame_info *fi;
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enum py_bt_status result = PY_BT_ERROR;
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int raw_arg = 0;
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int oind = 0;
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enum opt
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{
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NO_FRAME_FILTERS
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};
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static const struct mi_opt opts[] =
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{
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{"-no-frame-filters", NO_FRAME_FILTERS, 0},
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{ 0, 0, 0 }
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};
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/* Parse arguments. In this instance we are just looking for
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--no-frame-filters. */
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while (1)
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{
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char *oarg;
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int opt = mi_getopt ("-stack-list-frames", argc, argv,
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opts, &oind, &oarg);
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if (opt < 0)
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break;
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switch ((enum opt) opt)
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{
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case NO_FRAME_FILTERS:
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raw_arg = oind;
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break;
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}
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}
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/* After the last option is parsed, there should either be low -
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high range, or no further arguments. */
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if ((argc - oind != 0) && (argc - oind != 2))
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error (_("-stack-list-frames: Usage: [--no-frame-filters] [FRAME_LOW FRAME_HIGH]"));
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/* If there is a range, set it. */
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if (argc - oind == 2)
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{
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frame_low = atoi (argv[0 + oind]);
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frame_high = atoi (argv[1 + oind]);
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}
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else
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{
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/* Called with no arguments, it means we want the whole
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backtrace. */
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frame_low = -1;
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frame_high = -1;
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}
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/* Let's position fi on the frame at which to start the
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display. Could be the innermost frame if the whole stack needs
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displaying, or if frame_low is 0. */
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for (i = 0, fi = get_current_frame ();
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fi && i < frame_low;
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i++, fi = get_prev_frame (fi));
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if (fi == NULL)
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error (_("-stack-list-frames: Not enough frames in stack."));
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cleanup_stack = make_cleanup_ui_out_list_begin_end (current_uiout, "stack");
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if (! raw_arg && frame_filters)
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{
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int flags = PRINT_LEVEL | PRINT_FRAME_INFO;
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int py_frame_low = frame_low;
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/* We cannot pass -1 to frame_low, as that would signify a
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relative backtrace from the tail of the stack. So, in the case
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of frame_low == -1, assign and increment it. */
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if (py_frame_low == -1)
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py_frame_low++;
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result = apply_frame_filter (get_current_frame (), flags,
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NO_VALUES, current_uiout,
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py_frame_low, frame_high);
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}
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/* Run the inbuilt backtrace if there are no filters registered, or
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if "--no-frame-filters" has been specified from the command. */
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if (! frame_filters || raw_arg || result == PY_BT_NO_FILTERS)
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{
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/* Now let's print the frames up to frame_high, or until there are
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frames in the stack. */
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for (;
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fi && (i <= frame_high || frame_high == -1);
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i++, fi = get_prev_frame (fi))
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{
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QUIT;
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/* Print the location and the address always, even for level 0.
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If args is 0, don't print the arguments. */
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print_frame_info (fi, 1, LOC_AND_ADDRESS, 0 /* args */ );
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}
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}
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do_cleanups (cleanup_stack);
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}
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void
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mi_cmd_stack_info_depth (char *command, char **argv, int argc)
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{
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int frame_high;
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int i;
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struct frame_info *fi;
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if (argc > 1)
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error (_("-stack-info-depth: Usage: [MAX_DEPTH]"));
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if (argc == 1)
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frame_high = atoi (argv[0]);
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else
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/* Called with no arguments, it means we want the real depth of
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the stack. */
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frame_high = -1;
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for (i = 0, fi = get_current_frame ();
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fi && (i < frame_high || frame_high == -1);
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i++, fi = get_prev_frame (fi))
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QUIT;
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ui_out_field_int (current_uiout, "depth", i);
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}
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/* Print a list of the locals for the current frame. With argument of
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0, print only the names, with argument of 1 print also the
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values. */
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void
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mi_cmd_stack_list_locals (char *command, char **argv, int argc)
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{
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struct frame_info *frame;
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int raw_arg = 0;
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enum py_bt_status result = PY_BT_ERROR;
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int print_value;
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int oind = 0;
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if (argc > 1)
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{
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int i;
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enum opt
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{
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NO_FRAME_FILTERS
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};
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static const struct mi_opt opts[] =
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{
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{"-no-frame-filters", NO_FRAME_FILTERS, 0},
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{ 0, 0, 0 }
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};
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while (1)
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{
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char *oarg;
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/* Don't parse 'print-values' as an option. */
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int opt = mi_getopt ("-stack-list-locals", argc - 1, argv,
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opts, &oind, &oarg);
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if (opt < 0)
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break;
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switch ((enum opt) opt)
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{
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case NO_FRAME_FILTERS:
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raw_arg = oind;
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break;
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}
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}
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}
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/* After the last option is parsed, there should be only
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'print-values'. */
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if (argc - oind != 1)
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error (_("-stack-list-locals: Usage: [--no-frame-filters] PRINT_VALUES"));
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frame = get_selected_frame (NULL);
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print_value = mi_parse_print_values (argv[oind]);
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if (! raw_arg && frame_filters)
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{
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int flags = PRINT_LEVEL | PRINT_LOCALS;
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result = apply_frame_filter (frame, flags, print_value,
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current_uiout, 0, 0);
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}
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/* Run the inbuilt backtrace if there are no filters registered, or
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if "--no-frame-filters" has been specified from the command. */
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if (! frame_filters || raw_arg || result == PY_BT_NO_FILTERS)
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{
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list_args_or_locals (locals, print_value, frame);
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}
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}
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/* Print a list of the arguments for the current frame. With argument
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of 0, print only the names, with argument of 1 print also the
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values. */
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void
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mi_cmd_stack_list_args (char *command, char **argv, int argc)
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{
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int frame_low;
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int frame_high;
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int i;
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struct frame_info *fi;
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struct cleanup *cleanup_stack_args;
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enum print_values print_values;
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struct ui_out *uiout = current_uiout;
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int raw_arg = 0;
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enum py_bt_status result = PY_BT_ERROR;
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if (argc > 0)
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raw_arg = parse_no_frames_option (argv[0]);
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if (argc < 1 || (argc > 3 && ! raw_arg) || (argc == 2 && ! raw_arg))
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error (_("-stack-list-arguments: Usage: " \
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"[--no-frame-filters] PRINT_VALUES [FRAME_LOW FRAME_HIGH]"));
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if (argc >= 3)
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{
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frame_low = atoi (argv[1 + raw_arg]);
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frame_high = atoi (argv[2 + raw_arg]);
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}
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else
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{
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/* Called with no arguments, it means we want args for the whole
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backtrace. */
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frame_low = -1;
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frame_high = -1;
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}
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print_values = mi_parse_print_values (argv[raw_arg]);
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/* Let's position fi on the frame at which to start the
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display. Could be the innermost frame if the whole stack needs
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displaying, or if frame_low is 0. */
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for (i = 0, fi = get_current_frame ();
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fi && i < frame_low;
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i++, fi = get_prev_frame (fi));
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if (fi == NULL)
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error (_("-stack-list-arguments: Not enough frames in stack."));
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cleanup_stack_args
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= make_cleanup_ui_out_list_begin_end (uiout, "stack-args");
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if (! raw_arg && frame_filters)
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{
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int flags = PRINT_LEVEL | PRINT_ARGS;
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int py_frame_low = frame_low;
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/* We cannot pass -1 to frame_low, as that would signify a
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relative backtrace from the tail of the stack. So, in the case
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of frame_low == -1, assign and increment it. */
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if (py_frame_low == -1)
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py_frame_low++;
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result = apply_frame_filter (get_current_frame (), flags,
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print_values, current_uiout,
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py_frame_low, frame_high);
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}
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/* Run the inbuilt backtrace if there are no filters registered, or
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if "--no-frame-filters" has been specified from the command. */
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if (! frame_filters || raw_arg || result == PY_BT_NO_FILTERS)
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{
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/* Now let's print the frames up to frame_high, or until there are
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frames in the stack. */
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for (;
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fi && (i <= frame_high || frame_high == -1);
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i++, fi = get_prev_frame (fi))
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{
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struct cleanup *cleanup_frame;
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QUIT;
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cleanup_frame = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
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ui_out_field_int (uiout, "level", i);
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list_args_or_locals (arguments, print_values, fi);
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do_cleanups (cleanup_frame);
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}
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}
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do_cleanups (cleanup_stack_args);
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}
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/* Print a list of the local variables (including arguments) for the
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current frame. ARGC must be 1 and ARGV[0] specify if only the names,
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or both names and values of the variables must be printed. See
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parse_print_value for possible values. */
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void
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mi_cmd_stack_list_variables (char *command, char **argv, int argc)
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{
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struct frame_info *frame;
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int raw_arg = 0;
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enum py_bt_status result = PY_BT_ERROR;
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int print_value;
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int oind = 0;
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if (argc > 1)
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{
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int i;
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enum opt
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{
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NO_FRAME_FILTERS
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};
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static const struct mi_opt opts[] =
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{
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{"-no-frame-filters", NO_FRAME_FILTERS, 0},
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{ 0, 0, 0 }
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};
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while (1)
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{
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char *oarg;
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/* Don't parse 'print-values' as an option. */
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int opt = mi_getopt ("-stack-list-variables", argc - 1,
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argv, opts, &oind, &oarg);
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if (opt < 0)
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break;
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switch ((enum opt) opt)
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{
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case NO_FRAME_FILTERS:
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raw_arg = oind;
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break;
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}
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}
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}
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/* After the last option is parsed, there should be only
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'print-values'. */
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if (argc - oind != 1)
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error (_("-stack-list-variables: Usage: " \
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"[--no-frame-filters] PRINT_VALUES"));
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frame = get_selected_frame (NULL);
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print_value = mi_parse_print_values (argv[oind]);
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if (! raw_arg && frame_filters)
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{
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int flags = PRINT_LEVEL | PRINT_ARGS | PRINT_LOCALS;
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result = apply_frame_filter (frame, flags, print_value,
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current_uiout, 0, 0);
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}
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/* Run the inbuilt backtrace if there are no filters registered, or
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if "--no-frame-filters" has been specified from the command. */
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if (! frame_filters || raw_arg || result == PY_BT_NO_FILTERS)
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{
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list_args_or_locals (all, print_value, frame);
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}
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}
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/* Print single local or argument. ARG must be already read in. For
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WHAT and VALUES see list_args_or_locals.
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Errors are printed as if they would be the parameter value. Use
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zeroed ARG iff it should not be printed according to VALUES. */
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static void
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list_arg_or_local (const struct frame_arg *arg, enum what_to_list what,
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enum print_values values)
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{
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struct cleanup *old_chain;
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struct ui_out *uiout = current_uiout;
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struct ui_file *stb;
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stb = mem_fileopen ();
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old_chain = make_cleanup_ui_file_delete (stb);
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gdb_assert (!arg->val || !arg->error);
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gdb_assert ((values == PRINT_NO_VALUES && arg->val == NULL
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&& arg->error == NULL)
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|| values == PRINT_SIMPLE_VALUES
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|| (values == PRINT_ALL_VALUES
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&& (arg->val != NULL || arg->error != NULL)));
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gdb_assert (arg->entry_kind == print_entry_values_no
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|| (arg->entry_kind == print_entry_values_only
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&& (arg->val || arg->error)));
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if (values != PRINT_NO_VALUES || what == all)
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make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
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fputs_filtered (SYMBOL_PRINT_NAME (arg->sym), stb);
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if (arg->entry_kind == print_entry_values_only)
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fputs_filtered ("@entry", stb);
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ui_out_field_stream (uiout, "name", stb);
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if (what == all && SYMBOL_IS_ARGUMENT (arg->sym))
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ui_out_field_int (uiout, "arg", 1);
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if (values == PRINT_SIMPLE_VALUES)
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{
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check_typedef (arg->sym->type);
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type_print (arg->sym->type, "", stb, -1);
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ui_out_field_stream (uiout, "type", stb);
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}
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if (arg->val || arg->error)
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{
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volatile struct gdb_exception except;
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if (arg->error)
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except.message = arg->error;
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else
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{
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/* TRY_CATCH has two statements, wrap it in a block. */
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TRY_CATCH (except, RETURN_MASK_ERROR)
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{
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struct value_print_options opts;
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get_no_prettyformat_print_options (&opts);
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opts.deref_ref = 1;
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common_val_print (arg->val, stb, 0, &opts,
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language_def (SYMBOL_LANGUAGE (arg->sym)));
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}
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}
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if (except.message)
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fprintf_filtered (stb, _("<error reading variable: %s>"),
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except.message);
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ui_out_field_stream (uiout, "value", stb);
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}
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do_cleanups (old_chain);
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}
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/* Print a list of the locals or the arguments for the currently
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selected frame. If the argument passed is 0, printonly the names
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of the variables, if an argument of 1 is passed, print the values
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as well. */
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static void
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list_args_or_locals (enum what_to_list what, enum print_values values,
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struct frame_info *fi)
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{
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struct block *block;
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struct symbol *sym;
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struct block_iterator iter;
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struct cleanup *cleanup_list;
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struct type *type;
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char *name_of_result;
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struct ui_out *uiout = current_uiout;
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block = get_frame_block (fi, 0);
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switch (what)
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{
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case locals:
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name_of_result = "locals";
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break;
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case arguments:
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name_of_result = "args";
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break;
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case all:
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name_of_result = "variables";
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|
break;
|
|
default:
|
|
internal_error (__FILE__, __LINE__,
|
|
"unexpected what_to_list: %d", (int) what);
|
|
}
|
|
|
|
cleanup_list = make_cleanup_ui_out_list_begin_end (uiout, name_of_result);
|
|
|
|
while (block != 0)
|
|
{
|
|
ALL_BLOCK_SYMBOLS (block, iter, 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_ADDR: /* indirect register arg */
|
|
case LOC_LOCAL: /* stack local */
|
|
case LOC_STATIC: /* static */
|
|
case LOC_REGISTER: /* register */
|
|
case LOC_COMPUTED: /* computed location */
|
|
if (what == all)
|
|
print_me = 1;
|
|
else if (what == locals)
|
|
print_me = !SYMBOL_IS_ARGUMENT (sym);
|
|
else
|
|
print_me = SYMBOL_IS_ARGUMENT (sym);
|
|
break;
|
|
}
|
|
if (print_me)
|
|
{
|
|
struct symbol *sym2;
|
|
struct frame_arg arg, entryarg;
|
|
|
|
if (SYMBOL_IS_ARGUMENT (sym))
|
|
sym2 = lookup_symbol (SYMBOL_LINKAGE_NAME (sym),
|
|
block, VAR_DOMAIN,
|
|
NULL);
|
|
else
|
|
sym2 = sym;
|
|
gdb_assert (sym2 != NULL);
|
|
|
|
memset (&arg, 0, sizeof (arg));
|
|
arg.sym = sym2;
|
|
arg.entry_kind = print_entry_values_no;
|
|
memset (&entryarg, 0, sizeof (entryarg));
|
|
entryarg.sym = sym2;
|
|
entryarg.entry_kind = print_entry_values_no;
|
|
|
|
switch (values)
|
|
{
|
|
case PRINT_SIMPLE_VALUES:
|
|
type = check_typedef (sym2->type);
|
|
if (TYPE_CODE (type) != TYPE_CODE_ARRAY
|
|
&& TYPE_CODE (type) != TYPE_CODE_STRUCT
|
|
&& TYPE_CODE (type) != TYPE_CODE_UNION)
|
|
{
|
|
case PRINT_ALL_VALUES:
|
|
read_frame_arg (sym2, fi, &arg, &entryarg);
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (arg.entry_kind != print_entry_values_only)
|
|
list_arg_or_local (&arg, what, values);
|
|
if (entryarg.entry_kind != print_entry_values_no)
|
|
list_arg_or_local (&entryarg, what, values);
|
|
xfree (arg.error);
|
|
xfree (entryarg.error);
|
|
}
|
|
}
|
|
|
|
if (BLOCK_FUNCTION (block))
|
|
break;
|
|
else
|
|
block = BLOCK_SUPERBLOCK (block);
|
|
}
|
|
do_cleanups (cleanup_list);
|
|
}
|
|
|
|
void
|
|
mi_cmd_stack_select_frame (char *command, char **argv, int argc)
|
|
{
|
|
if (argc == 0 || argc > 1)
|
|
error (_("-stack-select-frame: Usage: FRAME_SPEC"));
|
|
|
|
select_frame_command (argv[0], 1 /* not used */ );
|
|
}
|
|
|
|
void
|
|
mi_cmd_stack_info_frame (char *command, char **argv, int argc)
|
|
{
|
|
if (argc > 0)
|
|
error (_("-stack-info-frame: No arguments allowed"));
|
|
|
|
print_frame_info (get_selected_frame (NULL), 1, LOC_AND_ADDRESS, 0);
|
|
}
|