2658 lines
76 KiB
C
2658 lines
76 KiB
C
/* Print and select stack frames for GDB, the GNU debugger.
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Copyright (C) 1986-2018 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 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 "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 "source.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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#include "ui-out.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 "reggroups.h"
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#include "regcache.h"
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#include "solib.h"
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#include "valprint.h"
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#include "gdbthread.h"
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#include "cp-support.h"
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#include "disasm.h"
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#include "inline-frame.h"
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#include "linespec.h"
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#include "cli/cli-utils.h"
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#include "objfiles.h"
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#include "safe-ctype.h"
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#include "symfile.h"
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#include "extension.h"
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#include "observer.h"
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#include "common/def-vector.h"
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/* The possible choices of "set print frame-arguments", and the value
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of this setting. */
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static const char *const print_frame_arguments_choices[] =
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{"all", "scalars", "none", NULL};
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static const char *print_frame_arguments = "scalars";
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/* If non-zero, don't invoke pretty-printers for frame arguments. */
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static int print_raw_frame_arguments;
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/* The possible choices of "set print entry-values", and the value
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of this setting. */
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const char print_entry_values_no[] = "no";
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const char print_entry_values_only[] = "only";
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const char print_entry_values_preferred[] = "preferred";
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const char print_entry_values_if_needed[] = "if-needed";
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const char print_entry_values_both[] = "both";
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const char print_entry_values_compact[] = "compact";
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const char print_entry_values_default[] = "default";
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static const char *const print_entry_values_choices[] =
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{
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print_entry_values_no,
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print_entry_values_only,
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print_entry_values_preferred,
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print_entry_values_if_needed,
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print_entry_values_both,
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print_entry_values_compact,
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print_entry_values_default,
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NULL
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};
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const char *print_entry_values = print_entry_values_default;
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/* Prototypes for local functions. */
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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 void print_frame (struct frame_info *frame, int print_level,
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enum print_what print_what, int print_args,
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struct symtab_and_line sal);
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static void set_last_displayed_sal (int valid,
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struct program_space *pspace,
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CORE_ADDR addr,
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struct symtab *symtab,
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int line);
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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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/* These variables hold the last symtab and line we displayed to the user.
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* This is where we insert a breakpoint or a skiplist entry by default. */
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static int last_displayed_sal_valid = 0;
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static struct program_space *last_displayed_pspace = 0;
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static CORE_ADDR last_displayed_addr = 0;
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static struct symtab *last_displayed_symtab = 0;
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static int last_displayed_line = 0;
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/* Return 1 if we should display the address in addition to the location,
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because we are in the middle of a statement. */
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static int
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frame_show_address (struct frame_info *frame,
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struct symtab_and_line sal)
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{
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/* If there is a line number, but no PC, then there is no location
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information associated with this sal. The only way that should
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happen is for the call sites of inlined functions (SAL comes from
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find_frame_sal). Otherwise, we would have some PC range if the
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SAL came from a line table. */
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if (sal.line != 0 && sal.pc == 0 && sal.end == 0)
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{
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if (get_next_frame (frame) == NULL)
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gdb_assert (inline_skipped_frames (inferior_ptid) > 0);
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else
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gdb_assert (get_frame_type (get_next_frame (frame)) == INLINE_FRAME);
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return 0;
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}
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return get_frame_pc (frame) != sal.pc;
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}
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/* See frame.h. */
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void
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print_stack_frame_to_uiout (struct ui_out *uiout, struct frame_info *frame,
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int print_level, enum print_what print_what,
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int set_current_sal)
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{
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scoped_restore save_uiout = make_scoped_restore (¤t_uiout, uiout);
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print_stack_frame (frame, print_level, print_what, set_current_sal);
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}
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/* Show or print a stack frame FRAME briefly. The output is formatted
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according to PRINT_LEVEL and PRINT_WHAT printing the frame's
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relative level, function name, argument list, and file name and
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line number. If the frame's PC is not at the beginning of the
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source line, the actual PC is printed at the beginning. */
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void
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print_stack_frame (struct frame_info *frame, int print_level,
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enum print_what print_what,
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int set_current_sal)
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{
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/* For mi, alway print location and address. */
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if (current_uiout->is_mi_like_p ())
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print_what = LOC_AND_ADDRESS;
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TRY
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{
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print_frame_info (frame, print_level, print_what, 1 /* print_args */,
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set_current_sal);
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if (set_current_sal)
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set_current_sal_from_frame (frame);
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}
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CATCH (e, RETURN_MASK_ERROR)
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{
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}
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END_CATCH
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}
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/* Print nameless arguments of frame FRAME on STREAM, where START is
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the offset of the first nameless argument, and NUM is the number of
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nameless arguments to print. FIRST is nonzero if this is the first
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argument (not just the first nameless argument). */
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static void
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print_frame_nameless_args (struct frame_info *frame, long start, int num,
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int first, struct ui_file *stream)
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{
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struct gdbarch *gdbarch = get_frame_arch (frame);
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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int i;
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CORE_ADDR argsaddr;
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long arg_value;
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for (i = 0; i < num; i++)
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{
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QUIT;
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argsaddr = get_frame_args_address (frame);
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if (!argsaddr)
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return;
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arg_value = read_memory_integer (argsaddr + start,
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sizeof (int), byte_order);
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if (!first)
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fprintf_filtered (stream, ", ");
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fprintf_filtered (stream, "%ld", arg_value);
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first = 0;
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start += sizeof (int);
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}
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}
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/* Print single argument of inferior function. ARG must be already
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read in.
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Errors are printed as if they would be the parameter value. Use zeroed ARG
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iff it should not be printed accoring to user settings. */
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static void
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print_frame_arg (const struct frame_arg *arg)
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{
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struct ui_out *uiout = current_uiout;
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const char *error_message = NULL;
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string_file stb;
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gdb_assert (!arg->val || !arg->error);
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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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|| (!uiout->is_mi_like_p ()
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&& arg->entry_kind == print_entry_values_compact));
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annotate_arg_emitter arg_emitter;
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ui_out_emit_tuple tuple_emitter (uiout, NULL);
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fprintf_symbol_filtered (&stb, SYMBOL_PRINT_NAME (arg->sym),
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SYMBOL_LANGUAGE (arg->sym), DMGL_PARAMS | DMGL_ANSI);
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if (arg->entry_kind == print_entry_values_compact)
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{
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/* It is OK to provide invalid MI-like stream as with
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PRINT_ENTRY_VALUE_COMPACT we never use MI. */
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stb.puts ("=");
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fprintf_symbol_filtered (&stb, SYMBOL_PRINT_NAME (arg->sym),
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SYMBOL_LANGUAGE (arg->sym),
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DMGL_PARAMS | DMGL_ANSI);
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}
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if (arg->entry_kind == print_entry_values_only
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|| arg->entry_kind == print_entry_values_compact)
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stb.puts ("@entry");
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uiout->field_stream ("name", stb);
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annotate_arg_name_end ();
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uiout->text ("=");
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if (!arg->val && !arg->error)
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uiout->text ("...");
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else
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{
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if (arg->error)
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error_message = arg->error;
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else
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{
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TRY
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{
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const struct language_defn *language;
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struct value_print_options opts;
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/* Avoid value_print because it will deref ref parameters. We
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just want to print their addresses. Print ??? for args whose
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address we do not know. We pass 2 as "recurse" to val_print
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because our standard indentation here is 4 spaces, and
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val_print indents 2 for each recurse. */
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annotate_arg_value (value_type (arg->val));
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/* Use the appropriate language to display our symbol, unless the
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user forced the language to a specific language. */
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if (language_mode == language_mode_auto)
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language = language_def (SYMBOL_LANGUAGE (arg->sym));
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else
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language = current_language;
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get_no_prettyformat_print_options (&opts);
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opts.deref_ref = 1;
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opts.raw = print_raw_frame_arguments;
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/* True in "summary" mode, false otherwise. */
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opts.summary = !strcmp (print_frame_arguments, "scalars");
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common_val_print (arg->val, &stb, 2, &opts, language);
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}
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CATCH (except, RETURN_MASK_ERROR)
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{
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error_message = except.message;
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}
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END_CATCH
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}
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if (error_message != NULL)
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stb.printf (_("<error reading variable: %s>"), error_message);
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}
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uiout->field_stream ("value", stb);
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}
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/* Read in inferior function local SYM at FRAME into ARGP. Caller is
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responsible for xfree of ARGP->ERROR. This function never throws an
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exception. */
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void
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read_frame_local (struct symbol *sym, struct frame_info *frame,
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struct frame_arg *argp)
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{
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argp->sym = sym;
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argp->val = NULL;
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argp->error = NULL;
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TRY
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{
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argp->val = read_var_value (sym, NULL, frame);
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}
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CATCH (except, RETURN_MASK_ERROR)
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{
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argp->error = xstrdup (except.message);
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}
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END_CATCH
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}
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/* Read in inferior function parameter SYM at FRAME into ARGP. Caller is
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responsible for xfree of ARGP->ERROR. This function never throws an
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exception. */
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void
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read_frame_arg (struct symbol *sym, struct frame_info *frame,
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struct frame_arg *argp, struct frame_arg *entryargp)
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{
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struct value *val = NULL, *entryval = NULL;
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char *val_error = NULL, *entryval_error = NULL;
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int val_equal = 0;
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if (print_entry_values != print_entry_values_only
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&& print_entry_values != print_entry_values_preferred)
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{
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TRY
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{
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val = read_var_value (sym, NULL, frame);
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}
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CATCH (except, RETURN_MASK_ERROR)
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{
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val_error = (char *) alloca (strlen (except.message) + 1);
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strcpy (val_error, except.message);
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}
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END_CATCH
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}
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if (SYMBOL_COMPUTED_OPS (sym) != NULL
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&& SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry != NULL
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&& print_entry_values != print_entry_values_no
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&& (print_entry_values != print_entry_values_if_needed
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|| !val || value_optimized_out (val)))
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{
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TRY
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||
{
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const struct symbol_computed_ops *ops;
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ops = SYMBOL_COMPUTED_OPS (sym);
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entryval = ops->read_variable_at_entry (sym, frame);
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}
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CATCH (except, RETURN_MASK_ERROR)
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||
{
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||
if (except.error != NO_ENTRY_VALUE_ERROR)
|
||
{
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entryval_error = (char *) alloca (strlen (except.message) + 1);
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strcpy (entryval_error, except.message);
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}
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}
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||
END_CATCH
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||
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if (entryval != NULL && value_optimized_out (entryval))
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entryval = NULL;
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||
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if (print_entry_values == print_entry_values_compact
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||
|| print_entry_values == print_entry_values_default)
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{
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||
/* For MI do not try to use print_entry_values_compact for ARGP. */
|
||
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||
if (val && entryval && !current_uiout->is_mi_like_p ())
|
||
{
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||
struct type *type = value_type (val);
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||
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||
if (value_lazy (val))
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||
value_fetch_lazy (val);
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||
if (value_lazy (entryval))
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||
value_fetch_lazy (entryval);
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||
|
||
if (value_contents_eq (val, 0, entryval, 0, TYPE_LENGTH (type)))
|
||
{
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||
/* Initialize it just to avoid a GCC false warning. */
|
||
struct value *val_deref = NULL, *entryval_deref;
|
||
|
||
/* DW_AT_call_value does match with the current
|
||
value. If it is a reference still try to verify if
|
||
dereferenced DW_AT_call_data_value does not differ. */
|
||
|
||
TRY
|
||
{
|
||
struct type *type_deref;
|
||
|
||
val_deref = coerce_ref (val);
|
||
if (value_lazy (val_deref))
|
||
value_fetch_lazy (val_deref);
|
||
type_deref = value_type (val_deref);
|
||
|
||
entryval_deref = coerce_ref (entryval);
|
||
if (value_lazy (entryval_deref))
|
||
value_fetch_lazy (entryval_deref);
|
||
|
||
/* If the reference addresses match but dereferenced
|
||
content does not match print them. */
|
||
if (val != val_deref
|
||
&& value_contents_eq (val_deref, 0,
|
||
entryval_deref, 0,
|
||
TYPE_LENGTH (type_deref)))
|
||
val_equal = 1;
|
||
}
|
||
CATCH (except, RETURN_MASK_ERROR)
|
||
{
|
||
/* If the dereferenced content could not be
|
||
fetched do not display anything. */
|
||
if (except.error == NO_ENTRY_VALUE_ERROR)
|
||
val_equal = 1;
|
||
else if (except.message != NULL)
|
||
{
|
||
entryval_error = (char *) alloca (strlen (except.message) + 1);
|
||
strcpy (entryval_error, except.message);
|
||
}
|
||
}
|
||
END_CATCH
|
||
|
||
/* Value was not a reference; and its content matches. */
|
||
if (val == val_deref)
|
||
val_equal = 1;
|
||
|
||
if (val_equal)
|
||
entryval = NULL;
|
||
}
|
||
}
|
||
|
||
/* Try to remove possibly duplicate error message for ENTRYARGP even
|
||
in MI mode. */
|
||
|
||
if (val_error && entryval_error
|
||
&& strcmp (val_error, entryval_error) == 0)
|
||
{
|
||
entryval_error = NULL;
|
||
|
||
/* Do not se VAL_EQUAL as the same error message may be shown for
|
||
the entry value even if no entry values are present in the
|
||
inferior. */
|
||
}
|
||
}
|
||
}
|
||
|
||
if (entryval == NULL)
|
||
{
|
||
if (print_entry_values == print_entry_values_preferred)
|
||
{
|
||
gdb_assert (val == NULL);
|
||
|
||
TRY
|
||
{
|
||
val = read_var_value (sym, NULL, frame);
|
||
}
|
||
CATCH (except, RETURN_MASK_ERROR)
|
||
{
|
||
val_error = (char *) alloca (strlen (except.message) + 1);
|
||
strcpy (val_error, except.message);
|
||
}
|
||
END_CATCH
|
||
}
|
||
if (print_entry_values == print_entry_values_only
|
||
|| print_entry_values == print_entry_values_both
|
||
|| (print_entry_values == print_entry_values_preferred
|
||
&& (!val || value_optimized_out (val))))
|
||
{
|
||
entryval = allocate_optimized_out_value (SYMBOL_TYPE (sym));
|
||
entryval_error = NULL;
|
||
}
|
||
}
|
||
if ((print_entry_values == print_entry_values_compact
|
||
|| print_entry_values == print_entry_values_if_needed
|
||
|| print_entry_values == print_entry_values_preferred)
|
||
&& (!val || value_optimized_out (val)) && entryval != NULL)
|
||
{
|
||
val = NULL;
|
||
val_error = NULL;
|
||
}
|
||
|
||
argp->sym = sym;
|
||
argp->val = val;
|
||
argp->error = val_error ? xstrdup (val_error) : NULL;
|
||
if (!val && !val_error)
|
||
argp->entry_kind = print_entry_values_only;
|
||
else if ((print_entry_values == print_entry_values_compact
|
||
|| print_entry_values == print_entry_values_default) && val_equal)
|
||
{
|
||
argp->entry_kind = print_entry_values_compact;
|
||
gdb_assert (!current_uiout->is_mi_like_p ());
|
||
}
|
||
else
|
||
argp->entry_kind = print_entry_values_no;
|
||
|
||
entryargp->sym = sym;
|
||
entryargp->val = entryval;
|
||
entryargp->error = entryval_error ? xstrdup (entryval_error) : NULL;
|
||
if (!entryval && !entryval_error)
|
||
entryargp->entry_kind = print_entry_values_no;
|
||
else
|
||
entryargp->entry_kind = print_entry_values_only;
|
||
}
|
||
|
||
/* Print the arguments of frame FRAME on STREAM, given the function
|
||
FUNC running in that frame (as a symbol), where NUM is the number
|
||
of arguments according to the stack frame (or -1 if the number of
|
||
arguments is unknown). */
|
||
|
||
/* Note that currently the "number of arguments according to the
|
||
stack frame" is only known on VAX where i refers to the "number of
|
||
ints of arguments according to the stack frame". */
|
||
|
||
static void
|
||
print_frame_args (struct symbol *func, struct frame_info *frame,
|
||
int num, struct ui_file *stream)
|
||
{
|
||
struct ui_out *uiout = current_uiout;
|
||
int first = 1;
|
||
/* Offset of next stack argument beyond the one we have seen that is
|
||
at the highest offset, or -1 if we haven't come to a stack
|
||
argument yet. */
|
||
long highest_offset = -1;
|
||
/* Number of ints of arguments that we have printed so far. */
|
||
int args_printed = 0;
|
||
/* True if we should print arguments, false otherwise. */
|
||
int print_args = strcmp (print_frame_arguments, "none");
|
||
|
||
if (func)
|
||
{
|
||
const struct block *b = SYMBOL_BLOCK_VALUE (func);
|
||
struct block_iterator iter;
|
||
struct symbol *sym;
|
||
|
||
ALL_BLOCK_SYMBOLS (b, iter, sym)
|
||
{
|
||
struct frame_arg arg, entryarg;
|
||
|
||
QUIT;
|
||
|
||
/* Keep track of the highest stack argument offset seen, and
|
||
skip over any kinds of symbols we don't care about. */
|
||
|
||
if (!SYMBOL_IS_ARGUMENT (sym))
|
||
continue;
|
||
|
||
switch (SYMBOL_CLASS (sym))
|
||
{
|
||
case LOC_ARG:
|
||
case LOC_REF_ARG:
|
||
{
|
||
long current_offset = SYMBOL_VALUE (sym);
|
||
int arg_size = TYPE_LENGTH (SYMBOL_TYPE (sym));
|
||
|
||
/* Compute address of next argument by adding the size of
|
||
this argument and rounding to an int boundary. */
|
||
current_offset =
|
||
((current_offset + arg_size + sizeof (int) - 1)
|
||
& ~(sizeof (int) - 1));
|
||
|
||
/* If this is the highest offset seen yet, set
|
||
highest_offset. */
|
||
if (highest_offset == -1
|
||
|| (current_offset > highest_offset))
|
||
highest_offset = current_offset;
|
||
|
||
/* Add the number of ints we're about to print to
|
||
args_printed. */
|
||
args_printed += (arg_size + sizeof (int) - 1) / sizeof (int);
|
||
}
|
||
|
||
/* We care about types of symbols, but don't need to
|
||
keep track of stack offsets in them. */
|
||
case LOC_REGISTER:
|
||
case LOC_REGPARM_ADDR:
|
||
case LOC_COMPUTED:
|
||
case LOC_OPTIMIZED_OUT:
|
||
default:
|
||
break;
|
||
}
|
||
|
||
/* 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 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). */
|
||
/* But if the parameter name is null, don't try it. Null
|
||
parameter names occur on the RS/6000, for traceback
|
||
tables. FIXME, should we even print them? */
|
||
|
||
if (*SYMBOL_LINKAGE_NAME (sym))
|
||
{
|
||
struct symbol *nsym;
|
||
|
||
nsym = lookup_symbol_search_name (SYMBOL_SEARCH_NAME (sym),
|
||
b, VAR_DOMAIN).symbol;
|
||
gdb_assert (nsym != NULL);
|
||
if (SYMBOL_CLASS (nsym) == LOC_REGISTER
|
||
&& !SYMBOL_IS_ARGUMENT (nsym))
|
||
{
|
||
/* There is a LOC_ARG/LOC_REGISTER pair. This means
|
||
that it was passed on the stack and loaded into a
|
||
register, or passed in a register and stored in a
|
||
stack slot. GDB 3.x used the LOC_ARG; GDB
|
||
4.0-4.11 used the LOC_REGISTER.
|
||
|
||
Reasons for using the LOC_ARG:
|
||
|
||
(1) Because find_saved_registers may be slow for
|
||
remote debugging.
|
||
|
||
(2) Because registers are often re-used and stack
|
||
slots rarely (never?) are. Therefore using
|
||
the stack slot is much less likely to print
|
||
garbage.
|
||
|
||
Reasons why we might want to use the LOC_REGISTER:
|
||
|
||
(1) So that the backtrace prints the same value
|
||
as "print foo". I see no compelling reason
|
||
why this needs to be the case; having the
|
||
backtrace print the value which was passed
|
||
in, and "print foo" print the value as
|
||
modified within the called function, makes
|
||
perfect sense to me.
|
||
|
||
Additional note: It might be nice if "info args"
|
||
displayed both values.
|
||
|
||
One more note: There is a case with SPARC
|
||
structure passing where we need to use the
|
||
LOC_REGISTER, but this is dealt with by creating
|
||
a single LOC_REGPARM in symbol reading. */
|
||
|
||
/* Leave sym (the LOC_ARG) alone. */
|
||
;
|
||
}
|
||
else
|
||
sym = nsym;
|
||
}
|
||
|
||
/* Print the current arg. */
|
||
if (!first)
|
||
uiout->text (", ");
|
||
uiout->wrap_hint (" ");
|
||
|
||
if (!print_args)
|
||
{
|
||
memset (&arg, 0, sizeof (arg));
|
||
arg.sym = sym;
|
||
arg.entry_kind = print_entry_values_no;
|
||
memset (&entryarg, 0, sizeof (entryarg));
|
||
entryarg.sym = sym;
|
||
entryarg.entry_kind = print_entry_values_no;
|
||
}
|
||
else
|
||
read_frame_arg (sym, frame, &arg, &entryarg);
|
||
|
||
if (arg.entry_kind != print_entry_values_only)
|
||
print_frame_arg (&arg);
|
||
|
||
if (entryarg.entry_kind != print_entry_values_no)
|
||
{
|
||
if (arg.entry_kind != print_entry_values_only)
|
||
{
|
||
uiout->text (", ");
|
||
uiout->wrap_hint (" ");
|
||
}
|
||
|
||
print_frame_arg (&entryarg);
|
||
}
|
||
|
||
xfree (arg.error);
|
||
xfree (entryarg.error);
|
||
|
||
first = 0;
|
||
}
|
||
}
|
||
|
||
/* Don't print nameless args in situations where we don't know
|
||
enough about the stack to find them. */
|
||
if (num != -1)
|
||
{
|
||
long start;
|
||
|
||
if (highest_offset == -1)
|
||
start = gdbarch_frame_args_skip (get_frame_arch (frame));
|
||
else
|
||
start = highest_offset;
|
||
|
||
print_frame_nameless_args (frame, start, num - args_printed,
|
||
first, stream);
|
||
}
|
||
}
|
||
|
||
/* Set the current source and line to the location given by frame
|
||
FRAME, if possible. When CENTER is true, adjust so the relevant
|
||
line is in the center of the next 'list'. */
|
||
|
||
void
|
||
set_current_sal_from_frame (struct frame_info *frame)
|
||
{
|
||
symtab_and_line sal = find_frame_sal (frame);
|
||
if (sal.symtab != NULL)
|
||
set_current_source_symtab_and_line (sal);
|
||
}
|
||
|
||
/* If ON, GDB will display disassembly of the next source line when
|
||
execution of the program being debugged stops.
|
||
If AUTO (which is the default), or there's no line info to determine
|
||
the source line of the next instruction, display disassembly of next
|
||
instruction instead. */
|
||
|
||
static enum auto_boolean disassemble_next_line;
|
||
|
||
static void
|
||
show_disassemble_next_line (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c,
|
||
const char *value)
|
||
{
|
||
fprintf_filtered (file,
|
||
_("Debugger's willingness to use "
|
||
"disassemble-next-line is %s.\n"),
|
||
value);
|
||
}
|
||
|
||
/* Use TRY_CATCH to catch the exception from the gdb_disassembly
|
||
because it will be broken by filter sometime. */
|
||
|
||
static void
|
||
do_gdb_disassembly (struct gdbarch *gdbarch,
|
||
int how_many, CORE_ADDR low, CORE_ADDR high)
|
||
{
|
||
|
||
TRY
|
||
{
|
||
gdb_disassembly (gdbarch, current_uiout,
|
||
DISASSEMBLY_RAW_INSN, how_many,
|
||
low, high);
|
||
}
|
||
CATCH (exception, RETURN_MASK_ERROR)
|
||
{
|
||
/* If an exception was thrown while doing the disassembly, print
|
||
the error message, to give the user a clue of what happened. */
|
||
exception_print (gdb_stderr, exception);
|
||
}
|
||
END_CATCH
|
||
}
|
||
|
||
/* Print information about frame FRAME. The output is format according
|
||
to PRINT_LEVEL and PRINT_WHAT and PRINT_ARGS. The meaning of
|
||
PRINT_WHAT is:
|
||
|
||
SRC_LINE: Print only source line.
|
||
LOCATION: Print only location.
|
||
LOC_AND_SRC: Print location and source line.
|
||
|
||
Used in "where" output, and to emit breakpoint or step
|
||
messages. */
|
||
|
||
void
|
||
print_frame_info (struct frame_info *frame, int print_level,
|
||
enum print_what print_what, int print_args,
|
||
int set_current_sal)
|
||
{
|
||
struct gdbarch *gdbarch = get_frame_arch (frame);
|
||
int source_print;
|
||
int location_print;
|
||
struct ui_out *uiout = current_uiout;
|
||
|
||
if (get_frame_type (frame) == DUMMY_FRAME
|
||
|| get_frame_type (frame) == SIGTRAMP_FRAME
|
||
|| get_frame_type (frame) == ARCH_FRAME)
|
||
{
|
||
ui_out_emit_tuple tuple_emitter (uiout, "frame");
|
||
|
||
annotate_frame_begin (print_level ? frame_relative_level (frame) : 0,
|
||
gdbarch, get_frame_pc (frame));
|
||
|
||
/* Do this regardless of SOURCE because we don't have any source
|
||
to list for this frame. */
|
||
if (print_level)
|
||
{
|
||
uiout->text ("#");
|
||
uiout->field_fmt_int (2, ui_left, "level",
|
||
frame_relative_level (frame));
|
||
}
|
||
if (uiout->is_mi_like_p ())
|
||
{
|
||
annotate_frame_address ();
|
||
uiout->field_core_addr ("addr",
|
||
gdbarch, get_frame_pc (frame));
|
||
annotate_frame_address_end ();
|
||
}
|
||
|
||
if (get_frame_type (frame) == DUMMY_FRAME)
|
||
{
|
||
annotate_function_call ();
|
||
uiout->field_string ("func", "<function called from gdb>");
|
||
}
|
||
else if (get_frame_type (frame) == SIGTRAMP_FRAME)
|
||
{
|
||
annotate_signal_handler_caller ();
|
||
uiout->field_string ("func", "<signal handler called>");
|
||
}
|
||
else if (get_frame_type (frame) == ARCH_FRAME)
|
||
{
|
||
uiout->field_string ("func", "<cross-architecture call>");
|
||
}
|
||
uiout->text ("\n");
|
||
annotate_frame_end ();
|
||
|
||
/* If disassemble-next-line is set to auto or on output the next
|
||
instruction. */
|
||
if (disassemble_next_line == AUTO_BOOLEAN_AUTO
|
||
|| disassemble_next_line == AUTO_BOOLEAN_TRUE)
|
||
do_gdb_disassembly (get_frame_arch (frame), 1,
|
||
get_frame_pc (frame), get_frame_pc (frame) + 1);
|
||
|
||
return;
|
||
}
|
||
|
||
/* If FRAME is not the innermost frame, that normally means that
|
||
FRAME->pc points to *after* the call instruction, and we want to
|
||
get the line containing the call, never the next line. But if
|
||
the next frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the
|
||
next frame was not entered as the result of a call, and we want
|
||
to get the line containing FRAME->pc. */
|
||
symtab_and_line sal = find_frame_sal (frame);
|
||
|
||
location_print = (print_what == LOCATION
|
||
|| print_what == LOC_AND_ADDRESS
|
||
|| print_what == SRC_AND_LOC);
|
||
|
||
if (location_print || !sal.symtab)
|
||
print_frame (frame, print_level, print_what, print_args, sal);
|
||
|
||
source_print = (print_what == SRC_LINE || print_what == SRC_AND_LOC);
|
||
|
||
/* If disassemble-next-line is set to auto or on and doesn't have
|
||
the line debug messages for $pc, output the next instruction. */
|
||
if ((disassemble_next_line == AUTO_BOOLEAN_AUTO
|
||
|| disassemble_next_line == AUTO_BOOLEAN_TRUE)
|
||
&& source_print && !sal.symtab)
|
||
do_gdb_disassembly (get_frame_arch (frame), 1,
|
||
get_frame_pc (frame), get_frame_pc (frame) + 1);
|
||
|
||
if (source_print && sal.symtab)
|
||
{
|
||
int done = 0;
|
||
int mid_statement = ((print_what == SRC_LINE)
|
||
&& frame_show_address (frame, sal));
|
||
|
||
if (annotation_level)
|
||
done = identify_source_line (sal.symtab, sal.line, mid_statement,
|
||
get_frame_pc (frame));
|
||
if (!done)
|
||
{
|
||
if (deprecated_print_frame_info_listing_hook)
|
||
deprecated_print_frame_info_listing_hook (sal.symtab,
|
||
sal.line,
|
||
sal.line + 1, 0);
|
||
else
|
||
{
|
||
struct value_print_options opts;
|
||
|
||
get_user_print_options (&opts);
|
||
/* We used to do this earlier, but that is clearly
|
||
wrong. This function is used by many different
|
||
parts of gdb, including normal_stop in infrun.c,
|
||
which uses this to print out the current PC
|
||
when we stepi/nexti into the middle of a source
|
||
line. Only the command line really wants this
|
||
behavior. Other UIs probably would like the
|
||
ability to decide for themselves if it is desired. */
|
||
if (opts.addressprint && mid_statement)
|
||
{
|
||
uiout->field_core_addr ("addr",
|
||
gdbarch, get_frame_pc (frame));
|
||
uiout->text ("\t");
|
||
}
|
||
|
||
print_source_lines (sal.symtab, sal.line, sal.line + 1, 0);
|
||
}
|
||
}
|
||
|
||
/* If disassemble-next-line is set to on and there is line debug
|
||
messages, output assembly codes for next line. */
|
||
if (disassemble_next_line == AUTO_BOOLEAN_TRUE)
|
||
do_gdb_disassembly (get_frame_arch (frame), -1, sal.pc, sal.end);
|
||
}
|
||
|
||
if (set_current_sal)
|
||
{
|
||
CORE_ADDR pc;
|
||
|
||
if (get_frame_pc_if_available (frame, &pc))
|
||
set_last_displayed_sal (1, sal.pspace, pc, sal.symtab, sal.line);
|
||
else
|
||
set_last_displayed_sal (0, 0, 0, 0, 0);
|
||
}
|
||
|
||
annotate_frame_end ();
|
||
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
|
||
/* Remember the last symtab and line we displayed, which we use e.g.
|
||
* as the place to put a breakpoint when the `break' command is
|
||
* invoked with no arguments. */
|
||
|
||
static void
|
||
set_last_displayed_sal (int valid, struct program_space *pspace,
|
||
CORE_ADDR addr, struct symtab *symtab,
|
||
int line)
|
||
{
|
||
last_displayed_sal_valid = valid;
|
||
last_displayed_pspace = pspace;
|
||
last_displayed_addr = addr;
|
||
last_displayed_symtab = symtab;
|
||
last_displayed_line = line;
|
||
if (valid && pspace == NULL)
|
||
{
|
||
clear_last_displayed_sal ();
|
||
internal_error (__FILE__, __LINE__,
|
||
_("Trying to set NULL pspace."));
|
||
}
|
||
}
|
||
|
||
/* Forget the last sal we displayed. */
|
||
|
||
void
|
||
clear_last_displayed_sal (void)
|
||
{
|
||
last_displayed_sal_valid = 0;
|
||
last_displayed_pspace = 0;
|
||
last_displayed_addr = 0;
|
||
last_displayed_symtab = 0;
|
||
last_displayed_line = 0;
|
||
}
|
||
|
||
/* Is our record of the last sal we displayed valid? If not,
|
||
* the get_last_displayed_* functions will return NULL or 0, as
|
||
* appropriate. */
|
||
|
||
int
|
||
last_displayed_sal_is_valid (void)
|
||
{
|
||
return last_displayed_sal_valid;
|
||
}
|
||
|
||
/* Get the pspace of the last sal we displayed, if it's valid. */
|
||
|
||
struct program_space *
|
||
get_last_displayed_pspace (void)
|
||
{
|
||
if (last_displayed_sal_valid)
|
||
return last_displayed_pspace;
|
||
return 0;
|
||
}
|
||
|
||
/* Get the address of the last sal we displayed, if it's valid. */
|
||
|
||
CORE_ADDR
|
||
get_last_displayed_addr (void)
|
||
{
|
||
if (last_displayed_sal_valid)
|
||
return last_displayed_addr;
|
||
return 0;
|
||
}
|
||
|
||
/* Get the symtab of the last sal we displayed, if it's valid. */
|
||
|
||
struct symtab*
|
||
get_last_displayed_symtab (void)
|
||
{
|
||
if (last_displayed_sal_valid)
|
||
return last_displayed_symtab;
|
||
return 0;
|
||
}
|
||
|
||
/* Get the line of the last sal we displayed, if it's valid. */
|
||
|
||
int
|
||
get_last_displayed_line (void)
|
||
{
|
||
if (last_displayed_sal_valid)
|
||
return last_displayed_line;
|
||
return 0;
|
||
}
|
||
|
||
/* Get the last sal we displayed, if it's valid. */
|
||
|
||
symtab_and_line
|
||
get_last_displayed_sal ()
|
||
{
|
||
symtab_and_line sal;
|
||
|
||
if (last_displayed_sal_valid)
|
||
{
|
||
sal.pspace = last_displayed_pspace;
|
||
sal.pc = last_displayed_addr;
|
||
sal.symtab = last_displayed_symtab;
|
||
sal.line = last_displayed_line;
|
||
}
|
||
|
||
return sal;
|
||
}
|
||
|
||
|
||
/* Attempt to obtain the name, FUNLANG and optionally FUNCP of the function
|
||
corresponding to FRAME. */
|
||
|
||
gdb::unique_xmalloc_ptr<char>
|
||
find_frame_funname (struct frame_info *frame, enum language *funlang,
|
||
struct symbol **funcp)
|
||
{
|
||
struct symbol *func;
|
||
gdb::unique_xmalloc_ptr<char> funname;
|
||
|
||
*funlang = language_unknown;
|
||
if (funcp)
|
||
*funcp = NULL;
|
||
|
||
func = get_frame_function (frame);
|
||
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
|
||
with -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 bound_minimal_symbol msymbol;
|
||
|
||
/* Don't attempt to do this for inlined functions, which do not
|
||
have a corresponding minimal symbol. */
|
||
if (!block_inlined_p (SYMBOL_BLOCK_VALUE (func)))
|
||
msymbol
|
||
= lookup_minimal_symbol_by_pc (get_frame_address_in_block (frame));
|
||
else
|
||
memset (&msymbol, 0, sizeof (msymbol));
|
||
|
||
if (msymbol.minsym != NULL
|
||
&& (BMSYMBOL_VALUE_ADDRESS (msymbol)
|
||
> BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
|
||
{
|
||
/* We also don't know anything about the function besides
|
||
its address and name. */
|
||
func = 0;
|
||
funname.reset (xstrdup (MSYMBOL_PRINT_NAME (msymbol.minsym)));
|
||
*funlang = MSYMBOL_LANGUAGE (msymbol.minsym);
|
||
}
|
||
else
|
||
{
|
||
const char *print_name = SYMBOL_PRINT_NAME (func);
|
||
|
||
*funlang = SYMBOL_LANGUAGE (func);
|
||
if (funcp)
|
||
*funcp = func;
|
||
if (*funlang == language_cplus)
|
||
{
|
||
/* It seems appropriate to use SYMBOL_PRINT_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 remove the parameters. */
|
||
funname = cp_remove_params (print_name);
|
||
}
|
||
|
||
/* If we didn't hit the C++ case above, set *funname
|
||
here. */
|
||
if (funname == NULL)
|
||
funname.reset (xstrdup (print_name));
|
||
}
|
||
}
|
||
else
|
||
{
|
||
struct bound_minimal_symbol msymbol;
|
||
CORE_ADDR pc;
|
||
|
||
if (!get_frame_address_in_block_if_available (frame, &pc))
|
||
return funname;
|
||
|
||
msymbol = lookup_minimal_symbol_by_pc (pc);
|
||
if (msymbol.minsym != NULL)
|
||
{
|
||
funname.reset (xstrdup (MSYMBOL_PRINT_NAME (msymbol.minsym)));
|
||
*funlang = MSYMBOL_LANGUAGE (msymbol.minsym);
|
||
}
|
||
}
|
||
|
||
return funname;
|
||
}
|
||
|
||
static void
|
||
print_frame (struct frame_info *frame, int print_level,
|
||
enum print_what print_what, int print_args,
|
||
struct symtab_and_line sal)
|
||
{
|
||
struct gdbarch *gdbarch = get_frame_arch (frame);
|
||
struct ui_out *uiout = current_uiout;
|
||
enum language funlang = language_unknown;
|
||
struct value_print_options opts;
|
||
struct symbol *func;
|
||
CORE_ADDR pc = 0;
|
||
int pc_p;
|
||
|
||
pc_p = get_frame_pc_if_available (frame, &pc);
|
||
|
||
gdb::unique_xmalloc_ptr<char> funname
|
||
= find_frame_funname (frame, &funlang, &func);
|
||
|
||
annotate_frame_begin (print_level ? frame_relative_level (frame) : 0,
|
||
gdbarch, pc);
|
||
|
||
{
|
||
ui_out_emit_tuple tuple_emitter (uiout, "frame");
|
||
|
||
if (print_level)
|
||
{
|
||
uiout->text ("#");
|
||
uiout->field_fmt_int (2, ui_left, "level",
|
||
frame_relative_level (frame));
|
||
}
|
||
get_user_print_options (&opts);
|
||
if (opts.addressprint)
|
||
if (!sal.symtab
|
||
|| frame_show_address (frame, sal)
|
||
|| print_what == LOC_AND_ADDRESS)
|
||
{
|
||
annotate_frame_address ();
|
||
if (pc_p)
|
||
uiout->field_core_addr ("addr", gdbarch, pc);
|
||
else
|
||
uiout->field_string ("addr", "<unavailable>");
|
||
annotate_frame_address_end ();
|
||
uiout->text (" in ");
|
||
}
|
||
annotate_frame_function_name ();
|
||
|
||
string_file stb;
|
||
fprintf_symbol_filtered (&stb, funname ? funname.get () : "??",
|
||
funlang, DMGL_ANSI);
|
||
uiout->field_stream ("func", stb);
|
||
uiout->wrap_hint (" ");
|
||
annotate_frame_args ();
|
||
|
||
uiout->text (" (");
|
||
if (print_args)
|
||
{
|
||
struct gdbarch *gdbarch = get_frame_arch (frame);
|
||
int numargs;
|
||
|
||
if (gdbarch_frame_num_args_p (gdbarch))
|
||
{
|
||
numargs = gdbarch_frame_num_args (gdbarch, frame);
|
||
gdb_assert (numargs >= 0);
|
||
}
|
||
else
|
||
numargs = -1;
|
||
|
||
{
|
||
ui_out_emit_list list_emitter (uiout, "args");
|
||
TRY
|
||
{
|
||
print_frame_args (func, frame, numargs, gdb_stdout);
|
||
}
|
||
CATCH (e, RETURN_MASK_ERROR)
|
||
{
|
||
}
|
||
END_CATCH
|
||
|
||
/* FIXME: ARGS must be a list. If one argument is a string it
|
||
will have " that will not be properly escaped. */
|
||
}
|
||
QUIT;
|
||
}
|
||
uiout->text (")");
|
||
if (sal.symtab)
|
||
{
|
||
const char *filename_display;
|
||
|
||
filename_display = symtab_to_filename_for_display (sal.symtab);
|
||
annotate_frame_source_begin ();
|
||
uiout->wrap_hint (" ");
|
||
uiout->text (" at ");
|
||
annotate_frame_source_file ();
|
||
uiout->field_string ("file", filename_display);
|
||
if (uiout->is_mi_like_p ())
|
||
{
|
||
const char *fullname = symtab_to_fullname (sal.symtab);
|
||
|
||
uiout->field_string ("fullname", fullname);
|
||
}
|
||
annotate_frame_source_file_end ();
|
||
uiout->text (":");
|
||
annotate_frame_source_line ();
|
||
uiout->field_int ("line", sal.line);
|
||
annotate_frame_source_end ();
|
||
}
|
||
|
||
if (pc_p && (funname == NULL || sal.symtab == NULL))
|
||
{
|
||
char *lib = solib_name_from_address (get_frame_program_space (frame),
|
||
get_frame_pc (frame));
|
||
|
||
if (lib)
|
||
{
|
||
annotate_frame_where ();
|
||
uiout->wrap_hint (" ");
|
||
uiout->text (" from ");
|
||
uiout->field_string ("from", lib);
|
||
}
|
||
}
|
||
}
|
||
|
||
uiout->text ("\n");
|
||
}
|
||
|
||
|
||
/* Read a frame specification in whatever the appropriate format is from
|
||
FRAME_EXP. Call error() if the specification is in any way invalid (so
|
||
this function never returns NULL). When SELECTED_FRAME_P is non-NULL
|
||
set its target to indicate that the default selected frame was used. */
|
||
|
||
static struct frame_info *
|
||
parse_frame_specification (const char *frame_exp, int *selected_frame_p)
|
||
{
|
||
int numargs;
|
||
struct value *args[4];
|
||
CORE_ADDR addrs[ARRAY_SIZE (args)];
|
||
|
||
if (frame_exp == NULL)
|
||
numargs = 0;
|
||
else
|
||
{
|
||
numargs = 0;
|
||
while (1)
|
||
{
|
||
const char *p;
|
||
|
||
/* Skip leading white space, bail of EOL. */
|
||
frame_exp = skip_spaces (frame_exp);
|
||
if (!*frame_exp)
|
||
break;
|
||
|
||
/* Parse the argument, extract it, save it. */
|
||
for (p = frame_exp;
|
||
*p && !ISSPACE (*p);
|
||
p++);
|
||
std::string addr_string (frame_exp, p - frame_exp);
|
||
frame_exp = p;
|
||
|
||
/* NOTE: Parse and evaluate expression, but do not use
|
||
functions such as parse_and_eval_long or
|
||
parse_and_eval_address to also extract the value.
|
||
Instead value_as_long and value_as_address are used.
|
||
This avoids problems with expressions that contain
|
||
side-effects. */
|
||
if (numargs >= ARRAY_SIZE (args))
|
||
error (_("Too many args in frame specification"));
|
||
args[numargs++] = parse_and_eval (addr_string.c_str ());
|
||
}
|
||
}
|
||
|
||
/* If no args, default to the selected frame. */
|
||
if (numargs == 0)
|
||
{
|
||
if (selected_frame_p != NULL)
|
||
(*selected_frame_p) = 1;
|
||
return get_selected_frame (_("No stack."));
|
||
}
|
||
|
||
/* None of the remaining use the selected frame. */
|
||
if (selected_frame_p != NULL)
|
||
(*selected_frame_p) = 0;
|
||
|
||
/* Assume the single arg[0] is an integer, and try using that to
|
||
select a frame relative to current. */
|
||
if (numargs == 1)
|
||
{
|
||
struct frame_info *fid;
|
||
int level = value_as_long (args[0]);
|
||
|
||
fid = find_relative_frame (get_current_frame (), &level);
|
||
if (level == 0)
|
||
/* find_relative_frame was successful. */
|
||
return fid;
|
||
}
|
||
|
||
/* Convert each value into a corresponding address. */
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < numargs; i++)
|
||
addrs[i] = value_as_address (args[i]);
|
||
}
|
||
|
||
/* Assume that the single arg[0] is an address, use that to identify
|
||
a frame with a matching ID. Should this also accept stack/pc or
|
||
stack/pc/special. */
|
||
if (numargs == 1)
|
||
{
|
||
struct frame_id id = frame_id_build_wild (addrs[0]);
|
||
struct frame_info *fid;
|
||
|
||
/* If (s)he specifies the frame with an address, he deserves
|
||
what (s)he gets. Still, give the highest one that matches.
|
||
(NOTE: cagney/2004-10-29: Why highest, or outer-most, I don't
|
||
know). */
|
||
for (fid = get_current_frame ();
|
||
fid != NULL;
|
||
fid = get_prev_frame (fid))
|
||
{
|
||
if (frame_id_eq (id, get_frame_id (fid)))
|
||
{
|
||
struct frame_info *prev_frame;
|
||
|
||
while (1)
|
||
{
|
||
prev_frame = get_prev_frame (fid);
|
||
if (!prev_frame
|
||
|| !frame_id_eq (id, get_frame_id (prev_frame)))
|
||
break;
|
||
fid = prev_frame;
|
||
}
|
||
return fid;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* We couldn't identify the frame as an existing frame, but
|
||
perhaps we can create one with a single argument. */
|
||
if (numargs == 1)
|
||
return create_new_frame (addrs[0], 0);
|
||
else if (numargs == 2)
|
||
return create_new_frame (addrs[0], addrs[1]);
|
||
else
|
||
error (_("Too many args in frame specification"));
|
||
}
|
||
|
||
/* Print verbosely the selected frame or the frame at address
|
||
ADDR_EXP. Absolutely all information in the frame is printed. */
|
||
|
||
static void
|
||
info_frame_command (const char *addr_exp, int from_tty)
|
||
{
|
||
struct frame_info *fi;
|
||
struct symbol *func;
|
||
struct symtab *s;
|
||
struct frame_info *calling_frame_info;
|
||
int numregs;
|
||
const char *funname = 0;
|
||
enum language funlang = language_unknown;
|
||
const char *pc_regname;
|
||
int selected_frame_p;
|
||
struct gdbarch *gdbarch;
|
||
CORE_ADDR frame_pc;
|
||
int frame_pc_p;
|
||
/* Initialize it to avoid "may be used uninitialized" warning. */
|
||
CORE_ADDR caller_pc = 0;
|
||
int caller_pc_p = 0;
|
||
|
||
fi = parse_frame_specification (addr_exp, &selected_frame_p);
|
||
gdbarch = get_frame_arch (fi);
|
||
|
||
/* Name of the value returned by get_frame_pc(). Per comments, "pc"
|
||
is not a good name. */
|
||
if (gdbarch_pc_regnum (gdbarch) >= 0)
|
||
/* OK, this is weird. The gdbarch_pc_regnum hardware register's value can
|
||
easily not match that of the internal value returned by
|
||
get_frame_pc(). */
|
||
pc_regname = gdbarch_register_name (gdbarch, gdbarch_pc_regnum (gdbarch));
|
||
else
|
||
/* But then, this is weird to. Even without gdbarch_pc_regnum, an
|
||
architectures will often have a hardware register called "pc",
|
||
and that register's value, again, can easily not match
|
||
get_frame_pc(). */
|
||
pc_regname = "pc";
|
||
|
||
frame_pc_p = get_frame_pc_if_available (fi, &frame_pc);
|
||
func = get_frame_function (fi);
|
||
symtab_and_line sal = find_frame_sal (fi);
|
||
s = sal.symtab;
|
||
gdb::unique_xmalloc_ptr<char> func_only;
|
||
if (func)
|
||
{
|
||
funname = SYMBOL_PRINT_NAME (func);
|
||
funlang = SYMBOL_LANGUAGE (func);
|
||
if (funlang == language_cplus)
|
||
{
|
||
/* It seems appropriate to use SYMBOL_PRINT_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 remove the parameters. */
|
||
func_only = cp_remove_params (funname);
|
||
|
||
if (func_only)
|
||
funname = func_only.get ();
|
||
}
|
||
}
|
||
else if (frame_pc_p)
|
||
{
|
||
struct bound_minimal_symbol msymbol;
|
||
|
||
msymbol = lookup_minimal_symbol_by_pc (frame_pc);
|
||
if (msymbol.minsym != NULL)
|
||
{
|
||
funname = MSYMBOL_PRINT_NAME (msymbol.minsym);
|
||
funlang = MSYMBOL_LANGUAGE (msymbol.minsym);
|
||
}
|
||
}
|
||
calling_frame_info = get_prev_frame (fi);
|
||
|
||
if (selected_frame_p && frame_relative_level (fi) >= 0)
|
||
{
|
||
printf_filtered (_("Stack level %d, frame at "),
|
||
frame_relative_level (fi));
|
||
}
|
||
else
|
||
{
|
||
printf_filtered (_("Stack frame at "));
|
||
}
|
||
fputs_filtered (paddress (gdbarch, get_frame_base (fi)), gdb_stdout);
|
||
printf_filtered (":\n");
|
||
printf_filtered (" %s = ", pc_regname);
|
||
if (frame_pc_p)
|
||
fputs_filtered (paddress (gdbarch, get_frame_pc (fi)), gdb_stdout);
|
||
else
|
||
fputs_filtered ("<unavailable>", 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)", symtab_to_filename_for_display (sal.symtab),
|
||
sal.line);
|
||
puts_filtered ("; ");
|
||
wrap_here (" ");
|
||
printf_filtered ("saved %s = ", pc_regname);
|
||
|
||
if (!frame_id_p (frame_unwind_caller_id (fi)))
|
||
val_print_not_saved (gdb_stdout);
|
||
else
|
||
{
|
||
TRY
|
||
{
|
||
caller_pc = frame_unwind_caller_pc (fi);
|
||
caller_pc_p = 1;
|
||
}
|
||
CATCH (ex, RETURN_MASK_ERROR)
|
||
{
|
||
switch (ex.error)
|
||
{
|
||
case NOT_AVAILABLE_ERROR:
|
||
val_print_unavailable (gdb_stdout);
|
||
break;
|
||
case OPTIMIZED_OUT_ERROR:
|
||
val_print_not_saved (gdb_stdout);
|
||
break;
|
||
default:
|
||
fprintf_filtered (gdb_stdout, _("<error: %s>"), ex.message);
|
||
break;
|
||
}
|
||
}
|
||
END_CATCH
|
||
}
|
||
|
||
if (caller_pc_p)
|
||
fputs_filtered (paddress (gdbarch, caller_pc), gdb_stdout);
|
||
printf_filtered ("\n");
|
||
|
||
if (calling_frame_info == NULL)
|
||
{
|
||
enum unwind_stop_reason reason;
|
||
|
||
reason = get_frame_unwind_stop_reason (fi);
|
||
if (reason != UNWIND_NO_REASON)
|
||
printf_filtered (_(" Outermost frame: %s\n"),
|
||
frame_stop_reason_string (fi));
|
||
}
|
||
else if (get_frame_type (fi) == TAILCALL_FRAME)
|
||
puts_filtered (" tail call frame");
|
||
else if (get_frame_type (fi) == INLINE_FRAME)
|
||
printf_filtered (" inlined into frame %d",
|
||
frame_relative_level (get_prev_frame (fi)));
|
||
else
|
||
{
|
||
printf_filtered (" called by frame at ");
|
||
fputs_filtered (paddress (gdbarch, get_frame_base (calling_frame_info)),
|
||
gdb_stdout);
|
||
}
|
||
if (get_next_frame (fi) && calling_frame_info)
|
||
puts_filtered (",");
|
||
wrap_here (" ");
|
||
if (get_next_frame (fi))
|
||
{
|
||
printf_filtered (" caller of frame at ");
|
||
fputs_filtered (paddress (gdbarch, get_frame_base (get_next_frame (fi))),
|
||
gdb_stdout);
|
||
}
|
||
if (get_next_frame (fi) || calling_frame_info)
|
||
puts_filtered ("\n");
|
||
|
||
if (s)
|
||
printf_filtered (" source language %s.\n",
|
||
language_str (s->language));
|
||
|
||
{
|
||
/* Address of the argument list for this frame, or 0. */
|
||
CORE_ADDR arg_list = get_frame_args_address (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 ");
|
||
fputs_filtered (paddress (gdbarch, arg_list), gdb_stdout);
|
||
printf_filtered (",");
|
||
|
||
if (!gdbarch_frame_num_args_p (gdbarch))
|
||
{
|
||
numargs = -1;
|
||
puts_filtered (" args: ");
|
||
}
|
||
else
|
||
{
|
||
numargs = gdbarch_frame_num_args (gdbarch, fi);
|
||
gdb_assert (numargs >= 0);
|
||
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 = get_frame_locals_address (fi);
|
||
|
||
if (arg_list == 0)
|
||
printf_filtered (" Locals at unknown address,");
|
||
else
|
||
{
|
||
printf_filtered (" Locals at ");
|
||
fputs_filtered (paddress (gdbarch, arg_list), gdb_stdout);
|
||
printf_filtered (",");
|
||
}
|
||
}
|
||
|
||
/* Print as much information as possible on the location of all the
|
||
registers. */
|
||
{
|
||
int count;
|
||
int i;
|
||
int need_nl = 1;
|
||
int sp_regnum = gdbarch_sp_regnum (gdbarch);
|
||
|
||
/* The sp is special; what's displayed isn't the save address, but
|
||
the value of the previous frame's sp. This is a legacy thing,
|
||
at one stage the frame cached the previous frame's SP instead
|
||
of its address, hence it was easiest to just display the cached
|
||
value. */
|
||
if (sp_regnum >= 0)
|
||
{
|
||
struct value *value = frame_unwind_register_value (fi, sp_regnum);
|
||
gdb_assert (value != NULL);
|
||
|
||
if (!value_optimized_out (value) && value_entirely_available (value))
|
||
{
|
||
if (VALUE_LVAL (value) == not_lval)
|
||
{
|
||
CORE_ADDR sp;
|
||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||
int sp_size = register_size (gdbarch, sp_regnum);
|
||
|
||
sp = extract_unsigned_integer (value_contents_all (value),
|
||
sp_size, byte_order);
|
||
|
||
printf_filtered (" Previous frame's sp is ");
|
||
fputs_filtered (paddress (gdbarch, sp), gdb_stdout);
|
||
printf_filtered ("\n");
|
||
}
|
||
else if (VALUE_LVAL (value) == lval_memory)
|
||
{
|
||
printf_filtered (" Previous frame's sp at ");
|
||
fputs_filtered (paddress (gdbarch, value_address (value)),
|
||
gdb_stdout);
|
||
printf_filtered ("\n");
|
||
}
|
||
else if (VALUE_LVAL (value) == lval_register)
|
||
{
|
||
printf_filtered (" Previous frame's sp in %s\n",
|
||
gdbarch_register_name (gdbarch,
|
||
VALUE_REGNUM (value)));
|
||
}
|
||
|
||
release_value (value);
|
||
value_free (value);
|
||
need_nl = 0;
|
||
}
|
||
/* else keep quiet. */
|
||
}
|
||
|
||
count = 0;
|
||
numregs = gdbarch_num_regs (gdbarch)
|
||
+ gdbarch_num_pseudo_regs (gdbarch);
|
||
for (i = 0; i < numregs; i++)
|
||
if (i != sp_regnum
|
||
&& gdbarch_register_reggroup_p (gdbarch, i, all_reggroup))
|
||
{
|
||
enum lval_type lval;
|
||
int optimized;
|
||
int unavailable;
|
||
CORE_ADDR addr;
|
||
int realnum;
|
||
|
||
/* Find out the location of the saved register without
|
||
fetching the corresponding value. */
|
||
frame_register_unwind (fi, i, &optimized, &unavailable,
|
||
&lval, &addr, &realnum, NULL);
|
||
/* For moment, only display registers that were saved on the
|
||
stack. */
|
||
if (!optimized && !unavailable && lval == lval_memory)
|
||
{
|
||
if (count == 0)
|
||
puts_filtered (" Saved registers:\n ");
|
||
else
|
||
puts_filtered (",");
|
||
wrap_here (" ");
|
||
printf_filtered (" %s at ",
|
||
gdbarch_register_name (gdbarch, i));
|
||
fputs_filtered (paddress (gdbarch, addr), gdb_stdout);
|
||
count++;
|
||
}
|
||
}
|
||
if (count || need_nl)
|
||
puts_filtered ("\n");
|
||
}
|
||
}
|
||
|
||
/* Print briefly all stack frames or just the innermost COUNT_EXP
|
||
frames. */
|
||
|
||
static void
|
||
backtrace_command_1 (const char *count_exp, int show_locals, int no_filters,
|
||
int from_tty)
|
||
{
|
||
struct frame_info *fi;
|
||
int count;
|
||
int i;
|
||
struct frame_info *trailing;
|
||
int trailing_level, py_start = 0, py_end = 0;
|
||
enum ext_lang_bt_status result = EXT_LANG_BT_ERROR;
|
||
|
||
if (!target_has_stack)
|
||
error (_("No stack."));
|
||
|
||
/* The following code must do two things. First, it must set the
|
||
variable TRAILING to the frame from which we should start
|
||
printing. Second, it must set the variable count to the number
|
||
of frames which we should print, or -1 if all of them. */
|
||
trailing = get_current_frame ();
|
||
|
||
trailing_level = 0;
|
||
if (count_exp)
|
||
{
|
||
count = parse_and_eval_long (count_exp);
|
||
if (count < 0)
|
||
{
|
||
struct frame_info *current;
|
||
|
||
py_start = count;
|
||
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
|
||
{
|
||
py_start = 0;
|
||
py_end = count;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
py_end = -1;
|
||
count = -1;
|
||
}
|
||
|
||
if (info_verbose)
|
||
{
|
||
/* 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))
|
||
{
|
||
CORE_ADDR pc;
|
||
|
||
QUIT;
|
||
pc = get_frame_address_in_block (fi);
|
||
expand_symtab_containing_pc (pc, find_pc_mapped_section (pc));
|
||
}
|
||
}
|
||
|
||
if (! no_filters)
|
||
{
|
||
int flags = PRINT_LEVEL | PRINT_FRAME_INFO | PRINT_ARGS;
|
||
enum ext_lang_frame_args arg_type;
|
||
|
||
if (show_locals)
|
||
flags |= PRINT_LOCALS;
|
||
|
||
if (!strcmp (print_frame_arguments, "scalars"))
|
||
arg_type = CLI_SCALAR_VALUES;
|
||
else if (!strcmp (print_frame_arguments, "all"))
|
||
arg_type = CLI_ALL_VALUES;
|
||
else
|
||
arg_type = NO_VALUES;
|
||
|
||
result = apply_ext_lang_frame_filter (get_current_frame (), flags,
|
||
arg_type, current_uiout,
|
||
py_start, py_end);
|
||
}
|
||
|
||
/* Run the inbuilt backtrace if there are no filters registered, or
|
||
"no-filters" has been specified from the command. */
|
||
if (no_filters || result == EXT_LANG_BT_NO_FILTERS)
|
||
{
|
||
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 (fi, 1, LOCATION, 1, 0);
|
||
if (show_locals)
|
||
{
|
||
struct frame_id frame_id = get_frame_id (fi);
|
||
|
||
print_frame_local_vars (fi, 1, gdb_stdout);
|
||
|
||
/* print_frame_local_vars invalidates FI. */
|
||
fi = frame_find_by_id (frame_id);
|
||
if (fi == NULL)
|
||
{
|
||
trailing = NULL;
|
||
warning (_("Unable to restore previously selected frame."));
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Save the last frame to check for error conditions. */
|
||
trailing = fi;
|
||
}
|
||
|
||
/* If we've stopped before the end, mention that. */
|
||
if (fi && from_tty)
|
||
printf_filtered (_("(More stack frames follow...)\n"));
|
||
|
||
/* If we've run out of frames, and the reason appears to be an error
|
||
condition, print it. */
|
||
if (fi == NULL && trailing != NULL)
|
||
{
|
||
enum unwind_stop_reason reason;
|
||
|
||
reason = get_frame_unwind_stop_reason (trailing);
|
||
if (reason >= UNWIND_FIRST_ERROR)
|
||
printf_filtered (_("Backtrace stopped: %s\n"),
|
||
frame_stop_reason_string (trailing));
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
backtrace_command (const char *arg, int from_tty)
|
||
{
|
||
int fulltrace_arg = -1, arglen = 0, argc = 0, no_filters = -1;
|
||
int user_arg = 0;
|
||
|
||
std::string reconstructed_arg;
|
||
if (arg)
|
||
{
|
||
char **argv;
|
||
int i;
|
||
|
||
gdb_argv built_argv (arg);
|
||
argv = built_argv.get ();
|
||
argc = 0;
|
||
for (i = 0; argv[i]; i++)
|
||
{
|
||
unsigned int j;
|
||
|
||
for (j = 0; j < strlen (argv[i]); j++)
|
||
argv[i][j] = TOLOWER (argv[i][j]);
|
||
|
||
if (no_filters < 0 && subset_compare (argv[i], "no-filters"))
|
||
no_filters = argc;
|
||
else
|
||
{
|
||
if (fulltrace_arg < 0 && subset_compare (argv[i], "full"))
|
||
fulltrace_arg = argc;
|
||
else
|
||
{
|
||
user_arg++;
|
||
arglen += strlen (argv[i]);
|
||
}
|
||
}
|
||
argc++;
|
||
}
|
||
arglen += user_arg;
|
||
if (fulltrace_arg >= 0 || no_filters >= 0)
|
||
{
|
||
if (arglen > 0)
|
||
{
|
||
for (i = 0; i < argc; i++)
|
||
{
|
||
if (i != fulltrace_arg && i != no_filters)
|
||
{
|
||
reconstructed_arg += argv[i];
|
||
reconstructed_arg += " ";
|
||
}
|
||
}
|
||
arg = reconstructed_arg.c_str ();
|
||
}
|
||
else
|
||
arg = NULL;
|
||
}
|
||
}
|
||
|
||
backtrace_command_1 (arg, fulltrace_arg >= 0 /* show_locals */,
|
||
no_filters >= 0 /* no frame-filters */, from_tty);
|
||
}
|
||
|
||
/* Iterate over the local variables of a block B, calling CB with
|
||
CB_DATA. */
|
||
|
||
static void
|
||
iterate_over_block_locals (const struct block *b,
|
||
iterate_over_block_arg_local_vars_cb cb,
|
||
void *cb_data)
|
||
{
|
||
struct block_iterator iter;
|
||
struct symbol *sym;
|
||
|
||
ALL_BLOCK_SYMBOLS (b, iter, sym)
|
||
{
|
||
switch (SYMBOL_CLASS (sym))
|
||
{
|
||
case LOC_LOCAL:
|
||
case LOC_REGISTER:
|
||
case LOC_STATIC:
|
||
case LOC_COMPUTED:
|
||
case LOC_OPTIMIZED_OUT:
|
||
if (SYMBOL_IS_ARGUMENT (sym))
|
||
break;
|
||
if (SYMBOL_DOMAIN (sym) == COMMON_BLOCK_DOMAIN)
|
||
break;
|
||
(*cb) (SYMBOL_PRINT_NAME (sym), sym, cb_data);
|
||
break;
|
||
|
||
default:
|
||
/* Ignore symbols which are not locals. */
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/* Same, but print labels. */
|
||
|
||
#if 0
|
||
/* Commented out, as the code using this function has also been
|
||
commented out. FIXME:brobecker/2009-01-13: Find out why the code
|
||
was commented out in the first place. The discussion introducing
|
||
this change (2007-12-04: Support lexical blocks and function bodies
|
||
that occupy non-contiguous address ranges) did not explain why
|
||
this change was made. */
|
||
static int
|
||
print_block_frame_labels (struct gdbarch *gdbarch, struct block *b,
|
||
int *have_default, struct ui_file *stream)
|
||
{
|
||
struct block_iterator iter;
|
||
struct symbol *sym;
|
||
int values_printed = 0;
|
||
|
||
ALL_BLOCK_SYMBOLS (b, iter, sym)
|
||
{
|
||
if (strcmp (SYMBOL_LINKAGE_NAME (sym), "default") == 0)
|
||
{
|
||
if (*have_default)
|
||
continue;
|
||
*have_default = 1;
|
||
}
|
||
if (SYMBOL_CLASS (sym) == LOC_LABEL)
|
||
{
|
||
struct symtab_and_line sal;
|
||
struct value_print_options opts;
|
||
|
||
sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0);
|
||
values_printed = 1;
|
||
fputs_filtered (SYMBOL_PRINT_NAME (sym), stream);
|
||
get_user_print_options (&opts);
|
||
if (opts.addressprint)
|
||
{
|
||
fprintf_filtered (stream, " ");
|
||
fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (sym)),
|
||
stream);
|
||
}
|
||
fprintf_filtered (stream, " in file %s, line %d\n",
|
||
sal.symtab->filename, sal.line);
|
||
}
|
||
}
|
||
|
||
return values_printed;
|
||
}
|
||
#endif
|
||
|
||
/* Iterate over all the local variables in block B, including all its
|
||
superblocks, stopping when the top-level block is reached. */
|
||
|
||
void
|
||
iterate_over_block_local_vars (const struct block *block,
|
||
iterate_over_block_arg_local_vars_cb cb,
|
||
void *cb_data)
|
||
{
|
||
while (block)
|
||
{
|
||
iterate_over_block_locals (block, cb, cb_data);
|
||
/* 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);
|
||
}
|
||
}
|
||
|
||
/* Data to be passed around in the calls to the locals and args
|
||
iterators. */
|
||
|
||
struct print_variable_and_value_data
|
||
{
|
||
struct frame_id frame_id;
|
||
int num_tabs;
|
||
struct ui_file *stream;
|
||
int values_printed;
|
||
};
|
||
|
||
/* The callback for the locals and args iterators. */
|
||
|
||
static void
|
||
do_print_variable_and_value (const char *print_name,
|
||
struct symbol *sym,
|
||
void *cb_data)
|
||
{
|
||
struct print_variable_and_value_data *p
|
||
= (struct print_variable_and_value_data *) cb_data;
|
||
struct frame_info *frame;
|
||
|
||
frame = frame_find_by_id (p->frame_id);
|
||
if (frame == NULL)
|
||
{
|
||
warning (_("Unable to restore previously selected frame."));
|
||
return;
|
||
}
|
||
|
||
print_variable_and_value (print_name, sym, frame, p->stream, p->num_tabs);
|
||
|
||
/* print_variable_and_value invalidates FRAME. */
|
||
frame = NULL;
|
||
|
||
p->values_printed = 1;
|
||
}
|
||
|
||
/* Print all variables from the innermost up to the function block of FRAME.
|
||
Print them with values to STREAM indented by NUM_TABS.
|
||
|
||
This function will invalidate FRAME. */
|
||
|
||
static void
|
||
print_frame_local_vars (struct frame_info *frame, int num_tabs,
|
||
struct ui_file *stream)
|
||
{
|
||
struct print_variable_and_value_data cb_data;
|
||
const struct block *block;
|
||
CORE_ADDR pc;
|
||
struct gdb_exception except = exception_none;
|
||
|
||
if (!get_frame_pc_if_available (frame, &pc))
|
||
{
|
||
fprintf_filtered (stream,
|
||
_("PC unavailable, cannot determine locals.\n"));
|
||
return;
|
||
}
|
||
|
||
block = get_frame_block (frame, 0);
|
||
if (block == 0)
|
||
{
|
||
fprintf_filtered (stream, "No symbol table info available.\n");
|
||
return;
|
||
}
|
||
|
||
cb_data.frame_id = get_frame_id (frame);
|
||
cb_data.num_tabs = 4 * num_tabs;
|
||
cb_data.stream = stream;
|
||
cb_data.values_printed = 0;
|
||
|
||
/* Temporarily change the selected frame to the given FRAME.
|
||
This allows routines that rely on the selected frame instead
|
||
of being given a frame as parameter to use the correct frame. */
|
||
select_frame (frame);
|
||
|
||
TRY
|
||
{
|
||
iterate_over_block_local_vars (block,
|
||
do_print_variable_and_value,
|
||
&cb_data);
|
||
}
|
||
CATCH (ex, RETURN_MASK_ALL)
|
||
{
|
||
except = ex;
|
||
}
|
||
END_CATCH
|
||
|
||
/* Restore the selected frame, and then rethrow if there was a problem. */
|
||
select_frame (frame_find_by_id (cb_data.frame_id));
|
||
if (except.reason < 0)
|
||
throw_exception (except);
|
||
|
||
/* do_print_variable_and_value invalidates FRAME. */
|
||
frame = NULL;
|
||
|
||
if (!cb_data.values_printed)
|
||
fprintf_filtered (stream, _("No locals.\n"));
|
||
}
|
||
|
||
void
|
||
info_locals_command (const char *args, int from_tty)
|
||
{
|
||
print_frame_local_vars (get_selected_frame (_("No frame selected.")),
|
||
0, gdb_stdout);
|
||
}
|
||
|
||
/* Iterate over all the argument variables in block B.
|
||
|
||
Returns 1 if any argument was walked; 0 otherwise. */
|
||
|
||
void
|
||
iterate_over_block_arg_vars (const struct block *b,
|
||
iterate_over_block_arg_local_vars_cb cb,
|
||
void *cb_data)
|
||
{
|
||
struct block_iterator iter;
|
||
struct symbol *sym, *sym2;
|
||
|
||
ALL_BLOCK_SYMBOLS (b, iter, sym)
|
||
{
|
||
/* Don't worry about things which aren't arguments. */
|
||
if (SYMBOL_IS_ARGUMENT (sym))
|
||
{
|
||
/* 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_search_name (SYMBOL_SEARCH_NAME (sym),
|
||
b, VAR_DOMAIN).symbol;
|
||
(*cb) (SYMBOL_PRINT_NAME (sym), sym2, cb_data);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Print all argument variables of the function of FRAME.
|
||
Print them with values to STREAM.
|
||
|
||
This function will invalidate FRAME. */
|
||
|
||
static void
|
||
print_frame_arg_vars (struct frame_info *frame, struct ui_file *stream)
|
||
{
|
||
struct print_variable_and_value_data cb_data;
|
||
struct symbol *func;
|
||
CORE_ADDR pc;
|
||
|
||
if (!get_frame_pc_if_available (frame, &pc))
|
||
{
|
||
fprintf_filtered (stream, _("PC unavailable, cannot determine args.\n"));
|
||
return;
|
||
}
|
||
|
||
func = get_frame_function (frame);
|
||
if (func == NULL)
|
||
{
|
||
fprintf_filtered (stream, _("No symbol table info available.\n"));
|
||
return;
|
||
}
|
||
|
||
cb_data.frame_id = get_frame_id (frame);
|
||
cb_data.num_tabs = 0;
|
||
cb_data.stream = gdb_stdout;
|
||
cb_data.values_printed = 0;
|
||
|
||
iterate_over_block_arg_vars (SYMBOL_BLOCK_VALUE (func),
|
||
do_print_variable_and_value, &cb_data);
|
||
|
||
/* do_print_variable_and_value invalidates FRAME. */
|
||
frame = NULL;
|
||
|
||
if (!cb_data.values_printed)
|
||
fprintf_filtered (stream, _("No arguments.\n"));
|
||
}
|
||
|
||
void
|
||
info_args_command (const char *ignore, int from_tty)
|
||
{
|
||
print_frame_arg_vars (get_selected_frame (_("No frame selected.")),
|
||
gdb_stdout);
|
||
}
|
||
|
||
/* Select frame FRAME. Also print the stack frame and show the source
|
||
if this is the tui version. */
|
||
static void
|
||
select_and_print_frame (struct frame_info *frame)
|
||
{
|
||
select_frame (frame);
|
||
if (frame)
|
||
print_stack_frame (frame, 1, SRC_AND_LOC, 1);
|
||
}
|
||
|
||
/* Return the symbol-block in which the selected frame is executing.
|
||
Can return zero under various legitimate circumstances.
|
||
|
||
If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
|
||
code address within the block returned. We use this to decide
|
||
which macros are in scope. */
|
||
|
||
const struct block *
|
||
get_selected_block (CORE_ADDR *addr_in_block)
|
||
{
|
||
if (!has_stack_frames ())
|
||
return 0;
|
||
|
||
return get_frame_block (get_selected_frame (NULL), addr_in_block);
|
||
}
|
||
|
||
/* 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 (struct frame_info *frame, int *level_offset_ptr)
|
||
{
|
||
/* Going up is simple: just call get_prev_frame enough times or
|
||
until the initial frame is reached. */
|
||
while (*level_offset_ptr > 0)
|
||
{
|
||
struct frame_info *prev = get_prev_frame (frame);
|
||
|
||
if (!prev)
|
||
break;
|
||
(*level_offset_ptr)--;
|
||
frame = prev;
|
||
}
|
||
|
||
/* Going down is just as simple. */
|
||
while (*level_offset_ptr < 0)
|
||
{
|
||
struct frame_info *next = get_next_frame (frame);
|
||
|
||
if (!next)
|
||
break;
|
||
(*level_offset_ptr)++;
|
||
frame = next;
|
||
}
|
||
|
||
return frame;
|
||
}
|
||
|
||
/* The "select_frame" command. With no argument this is a NOP.
|
||
Select the frame at level LEVEL_EXP 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. */
|
||
|
||
void
|
||
select_frame_command (const char *level_exp, int from_tty)
|
||
{
|
||
struct frame_info *prev_frame = get_selected_frame_if_set ();
|
||
|
||
select_frame (parse_frame_specification (level_exp, NULL));
|
||
if (get_selected_frame_if_set () != prev_frame)
|
||
observer_notify_user_selected_context_changed (USER_SELECTED_FRAME);
|
||
}
|
||
|
||
/* The "frame" command. With no argument, print the selected frame
|
||
briefly. With an argument, behave like select_frame and then print
|
||
the selected frame. */
|
||
|
||
static void
|
||
frame_command (const char *level_exp, int from_tty)
|
||
{
|
||
struct frame_info *prev_frame = get_selected_frame_if_set ();
|
||
|
||
select_frame (parse_frame_specification (level_exp, NULL));
|
||
if (get_selected_frame_if_set () != prev_frame)
|
||
observer_notify_user_selected_context_changed (USER_SELECTED_FRAME);
|
||
else
|
||
print_selected_thread_frame (current_uiout, USER_SELECTED_FRAME);
|
||
}
|
||
|
||
/* Select the frame up one or COUNT_EXP stack levels from the
|
||
previously selected frame, and print it briefly. */
|
||
|
||
static void
|
||
up_silently_base (const char *count_exp)
|
||
{
|
||
struct frame_info *frame;
|
||
int count = 1;
|
||
|
||
if (count_exp)
|
||
count = parse_and_eval_long (count_exp);
|
||
|
||
frame = find_relative_frame (get_selected_frame ("No stack."), &count);
|
||
if (count != 0 && count_exp == NULL)
|
||
error (_("Initial frame selected; you cannot go up."));
|
||
select_frame (frame);
|
||
}
|
||
|
||
static void
|
||
up_silently_command (const char *count_exp, int from_tty)
|
||
{
|
||
up_silently_base (count_exp);
|
||
}
|
||
|
||
static void
|
||
up_command (const char *count_exp, int from_tty)
|
||
{
|
||
up_silently_base (count_exp);
|
||
observer_notify_user_selected_context_changed (USER_SELECTED_FRAME);
|
||
}
|
||
|
||
/* Select the frame down one or COUNT_EXP stack levels from the previously
|
||
selected frame, and print it briefly. */
|
||
|
||
static void
|
||
down_silently_base (const char *count_exp)
|
||
{
|
||
struct frame_info *frame;
|
||
int count = -1;
|
||
|
||
if (count_exp)
|
||
count = -parse_and_eval_long (count_exp);
|
||
|
||
frame = find_relative_frame (get_selected_frame ("No stack."), &count);
|
||
if (count != 0 && count_exp == NULL)
|
||
{
|
||
/* 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 (innermost) frame selected; you cannot go down."));
|
||
}
|
||
|
||
select_frame (frame);
|
||
}
|
||
|
||
static void
|
||
down_silently_command (const char *count_exp, int from_tty)
|
||
{
|
||
down_silently_base (count_exp);
|
||
}
|
||
|
||
static void
|
||
down_command (const char *count_exp, int from_tty)
|
||
{
|
||
down_silently_base (count_exp);
|
||
observer_notify_user_selected_context_changed (USER_SELECTED_FRAME);
|
||
}
|
||
|
||
void
|
||
return_command (const char *retval_exp, int from_tty)
|
||
{
|
||
/* Initialize it just to avoid a GCC false warning. */
|
||
enum return_value_convention rv_conv = RETURN_VALUE_STRUCT_CONVENTION;
|
||
struct frame_info *thisframe;
|
||
struct gdbarch *gdbarch;
|
||
struct symbol *thisfun;
|
||
struct value *return_value = NULL;
|
||
struct value *function = NULL;
|
||
const char *query_prefix = "";
|
||
|
||
thisframe = get_selected_frame ("No selected frame.");
|
||
thisfun = get_frame_function (thisframe);
|
||
gdbarch = get_frame_arch (thisframe);
|
||
|
||
if (get_frame_type (get_current_frame ()) == INLINE_FRAME)
|
||
error (_("Can not force return from an inlined function."));
|
||
|
||
/* Compute the return value. If the computation triggers an error,
|
||
let it bail. If the return type can't be handled, set
|
||
RETURN_VALUE to NULL, and QUERY_PREFIX to an informational
|
||
message. */
|
||
if (retval_exp)
|
||
{
|
||
expression_up retval_expr = parse_expression (retval_exp);
|
||
struct type *return_type = NULL;
|
||
|
||
/* Compute the return value. Should the computation fail, this
|
||
call throws an error. */
|
||
return_value = evaluate_expression (retval_expr.get ());
|
||
|
||
/* Cast return value to the return type of the function. Should
|
||
the cast fail, this call throws an error. */
|
||
if (thisfun != NULL)
|
||
return_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun));
|
||
if (return_type == NULL)
|
||
{
|
||
if (retval_expr->elts[0].opcode != UNOP_CAST
|
||
&& retval_expr->elts[0].opcode != UNOP_CAST_TYPE)
|
||
error (_("Return value type not available for selected "
|
||
"stack frame.\n"
|
||
"Please use an explicit cast of the value to return."));
|
||
return_type = value_type (return_value);
|
||
}
|
||
return_type = check_typedef (return_type);
|
||
return_value = value_cast (return_type, return_value);
|
||
|
||
/* Make sure the value is fully evaluated. It may live in the
|
||
stack frame we're about to pop. */
|
||
if (value_lazy (return_value))
|
||
value_fetch_lazy (return_value);
|
||
|
||
if (thisfun != NULL)
|
||
function = read_var_value (thisfun, NULL, thisframe);
|
||
|
||
rv_conv = RETURN_VALUE_REGISTER_CONVENTION;
|
||
if (TYPE_CODE (return_type) == TYPE_CODE_VOID)
|
||
/* If the return-type is "void", don't try to find the
|
||
return-value's location. However, do still evaluate the
|
||
return expression so that, even when the expression result
|
||
is discarded, side effects such as "return i++" still
|
||
occur. */
|
||
return_value = NULL;
|
||
else if (thisfun != NULL)
|
||
{
|
||
rv_conv = struct_return_convention (gdbarch, function, return_type);
|
||
if (rv_conv == RETURN_VALUE_STRUCT_CONVENTION
|
||
|| rv_conv == RETURN_VALUE_ABI_RETURNS_ADDRESS)
|
||
{
|
||
query_prefix = "The location at which to store the "
|
||
"function's return value is unknown.\n"
|
||
"If you continue, the return value "
|
||
"that you specified will be ignored.\n";
|
||
return_value = NULL;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Does an interactive user really want to do this? Include
|
||
information, such as how well GDB can handle the return value, in
|
||
the query message. */
|
||
if (from_tty)
|
||
{
|
||
int confirmed;
|
||
|
||
if (thisfun == NULL)
|
||
confirmed = query (_("%sMake selected stack frame return now? "),
|
||
query_prefix);
|
||
else
|
||
{
|
||
if (TYPE_NO_RETURN (thisfun->type))
|
||
warning (_("Function does not return normally to caller."));
|
||
confirmed = query (_("%sMake %s return now? "), query_prefix,
|
||
SYMBOL_PRINT_NAME (thisfun));
|
||
}
|
||
if (!confirmed)
|
||
error (_("Not confirmed"));
|
||
}
|
||
|
||
/* Discard the selected frame and all frames inner-to it. */
|
||
frame_pop (get_selected_frame (NULL));
|
||
|
||
/* Store RETURN_VALUE in the just-returned register set. */
|
||
if (return_value != NULL)
|
||
{
|
||
struct type *return_type = value_type (return_value);
|
||
struct gdbarch *gdbarch = get_current_regcache ()->arch ();
|
||
|
||
gdb_assert (rv_conv != RETURN_VALUE_STRUCT_CONVENTION
|
||
&& rv_conv != RETURN_VALUE_ABI_RETURNS_ADDRESS);
|
||
gdbarch_return_value (gdbarch, function, return_type,
|
||
get_current_regcache (), NULL /*read*/,
|
||
value_contents (return_value) /*write*/);
|
||
}
|
||
|
||
/* If we are at the end of a call dummy now, pop the dummy frame
|
||
too. */
|
||
if (get_frame_type (get_current_frame ()) == DUMMY_FRAME)
|
||
frame_pop (get_current_frame ());
|
||
|
||
select_frame (get_current_frame ());
|
||
/* If interactive, print the frame that is now current. */
|
||
if (from_tty)
|
||
print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
|
||
}
|
||
|
||
/* 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 (const char *arg, int from_tty)
|
||
{
|
||
struct frame_info *frame;
|
||
int found = 0;
|
||
int level = 1;
|
||
|
||
if (arg == NULL)
|
||
return;
|
||
|
||
frame = get_current_frame ();
|
||
std::vector<symtab_and_line> sals
|
||
= decode_line_with_current_source (arg, DECODE_LINE_FUNFIRSTLINE);
|
||
gdb::def_vector<function_bounds> func_bounds (sals.size ());
|
||
for (size_t i = 0; (i < sals.size () && !found); i++)
|
||
{
|
||
if (sals[i].pspace != current_program_space)
|
||
func_bounds[i].low = func_bounds[i].high = 0;
|
||
else if (sals[i].pc == 0
|
||
|| find_pc_partial_function (sals[i].pc, NULL,
|
||
&func_bounds[i].low,
|
||
&func_bounds[i].high) == 0)
|
||
{
|
||
func_bounds[i].low = func_bounds[i].high = 0;
|
||
}
|
||
}
|
||
|
||
do
|
||
{
|
||
for (size_t i = 0; (i < sals.size () && !found); i++)
|
||
found = (get_frame_pc (frame) >= func_bounds[i].low
|
||
&& get_frame_pc (frame) < func_bounds[i].high);
|
||
if (!found)
|
||
{
|
||
level = 1;
|
||
frame = find_relative_frame (frame, &level);
|
||
}
|
||
}
|
||
while (!found && level == 0);
|
||
|
||
if (!found)
|
||
printf_filtered (_("'%s' not within current stack frame.\n"), arg);
|
||
else if (frame != get_selected_frame (NULL))
|
||
select_and_print_frame (frame);
|
||
}
|
||
|
||
void
|
||
_initialize_stack (void)
|
||
{
|
||
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.\nWith 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"));
|
||
|
||
add_com_alias ("f", "frame", class_stack, 1);
|
||
|
||
add_com_suppress_notification ("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"),
|
||
&cli_suppress_notification.user_selected_context);
|
||
|
||
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.\nUse of the \
|
||
'full' qualifier also prints the values of the local variables.\n\
|
||
Use of the 'no-filters' qualifier prohibits frame filters from executing\n\
|
||
on this backtrace.\n"));
|
||
add_com_alias ("bt", "backtrace", class_stack, 0);
|
||
|
||
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", info_frame_command,
|
||
_("All about selected stack frame, or frame at ADDR."));
|
||
add_info_alias ("f", "frame", 1);
|
||
add_info ("locals", info_locals_command,
|
||
_("Local variables of current stack frame."));
|
||
add_info ("args", info_args_command,
|
||
_("Argument variables of current stack frame."));
|
||
|
||
if (dbx_commands)
|
||
add_com ("func", class_stack, func_command, _("\
|
||
Select the stack frame that contains <func>.\n\
|
||
Usage: func <name>\n"));
|
||
|
||
add_setshow_enum_cmd ("frame-arguments", class_stack,
|
||
print_frame_arguments_choices, &print_frame_arguments,
|
||
_("Set printing of non-scalar frame arguments"),
|
||
_("Show printing of non-scalar frame arguments"),
|
||
NULL, NULL, NULL, &setprintlist, &showprintlist);
|
||
|
||
add_setshow_boolean_cmd ("frame-arguments", no_class,
|
||
&print_raw_frame_arguments, _("\
|
||
Set whether to print frame arguments in raw form."), _("\
|
||
Show whether to print frame arguments in raw form."), _("\
|
||
If set, frame arguments are printed in raw form, bypassing any\n\
|
||
pretty-printers for that value."),
|
||
NULL, NULL,
|
||
&setprintrawlist, &showprintrawlist);
|
||
|
||
add_setshow_auto_boolean_cmd ("disassemble-next-line", class_stack,
|
||
&disassemble_next_line, _("\
|
||
Set whether to disassemble next source line or insn when execution stops."),
|
||
_("\
|
||
Show whether to disassemble next source line or insn when execution stops."),
|
||
_("\
|
||
If ON, GDB will display disassembly of the next source line, in addition\n\
|
||
to displaying the source line itself. If the next source line cannot\n\
|
||
be displayed (e.g., source is unavailable or there's no line info), GDB\n\
|
||
will display disassembly of next instruction instead of showing the\n\
|
||
source line.\n\
|
||
If AUTO, display disassembly of next instruction only if the source line\n\
|
||
cannot be displayed.\n\
|
||
If OFF (which is the default), never display the disassembly of the next\n\
|
||
source line."),
|
||
NULL,
|
||
show_disassemble_next_line,
|
||
&setlist, &showlist);
|
||
disassemble_next_line = AUTO_BOOLEAN_FALSE;
|
||
|
||
add_setshow_enum_cmd ("entry-values", class_stack,
|
||
print_entry_values_choices, &print_entry_values,
|
||
_("Set printing of function arguments at function "
|
||
"entry"),
|
||
_("Show printing of function arguments at function "
|
||
"entry"),
|
||
_("\
|
||
GDB can sometimes determine the values of function arguments at entry,\n\
|
||
in addition to their current values. This option tells GDB whether\n\
|
||
to print the current value, the value at entry (marked as val@entry),\n\
|
||
or both. Note that one or both of these values may be <optimized out>."),
|
||
NULL, NULL, &setprintlist, &showprintlist);
|
||
}
|