gdb/frame-base.c - gdb

Global variables defined

Data types defined

Functions defined

Source code

  1. /* Definitions for frame address handler, for GDB, the GNU debugger.

  3.    Copyright (C) 2003-2015 Free Software Foundation, Inc.

  5.    This file is part of GDB.

  7.    This program is free software; you can redistribute it and/or modify
  8.    it under the terms of the GNU General Public License as published by
  9.    the Free Software Foundation; either version 3 of the License, or
  10.    (at your option) any later version.

  12.    This program is distributed in the hope that it will be useful,
  13.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15.    GNU General Public License for more details.

  17.    You should have received a copy of the GNU General Public License
  18.    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

  20. #include "defs.h"
  21. #include "frame-base.h"
  22. #include "frame.h"
  23. #include "gdb_obstack.h"

  25. /* A default frame base implementations.  If it wasn't for the old
  26.    DEPRECATED_FRAME_LOCALS_ADDRESS and DEPRECATED_FRAME_ARGS_ADDRESS,
  27.    these could be combined into a single function.  All architectures
  28.    really need to override this.  */

  30. static CORE_ADDR
  31. ‌default_frame_base_address (struct frame_info *this_frame, void **this_cache)
  32. {
  33.   return get_frame_base (this_frame); /* sigh! */
  34. }

  36. static CORE_ADDR
  37. ‌default_frame_locals_address (struct frame_info *this_frame, void **this_cache)
  38. {
  39.   return default_frame_base_address (this_frame, this_cache);
  40. }

  42. static CORE_ADDR
  43. ‌default_frame_args_address (struct frame_info *this_frame, void **this_cache)
  44. {
  45.   return default_frame_base_address (this_frame, this_cache);
  46. }

  48. ‌const struct frame_base default_frame_base = {
  49.   NULL, /* No parent.  */
  50.   default_frame_base_address,
  51.   default_frame_locals_address,
  52.   default_frame_args_address
  53. };

  55. ‌static struct gdbarch_data *frame_base_data;

  57. ‌struct frame_base_table_entry
  58. {
  59.   frame_base_sniffer_ftype *sniffer;
  60.   struct frame_base_table_entry *next;
  61. };

  63. ‌struct frame_base_table
  64. {
  65.   struct frame_base_table_entry *head;
  66.   struct frame_base_table_entry **tail;
  67.   const struct frame_base *default_base;
  68. };

  70. static void *
  71. ‌frame_base_init (struct obstack *obstack)
  72. {
  73.   struct frame_base_table *table
  74.     = OBSTACK_ZALLOC (obstack, struct frame_base_table);

  76.   table->tail = &table->head;
  77.   table->default_base = &default_frame_base;
  78.   return table;
  79. }

  81. void
  82. ‌frame_base_append_sniffer (struct gdbarch *gdbarch,
  83.                            frame_base_sniffer_ftype *sniffer)
  84. {
  85.   struct frame_base_table *table = gdbarch_data (gdbarch, frame_base_data);

  87.   (*table->tail)
  88.     = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_base_table_entry);
  89.   (*table->tail)->sniffer = sniffer;
  90.   table->tail = &(*table->tail)->next;
  91. }

  93. void
  94. ‌frame_base_set_default (struct gdbarch *gdbarch,
  95.                         const struct frame_base *default_base)
  96. {
  97.   struct frame_base_table *table = gdbarch_data (gdbarch, frame_base_data);

  99.   table->default_base = default_base;
  100. }

  102. const struct frame_base *
  103. ‌frame_base_find_by_frame (struct frame_info *this_frame)
  104. {
  105.   struct gdbarch *gdbarch = get_frame_arch (this_frame);
  106.   struct frame_base_table *table = gdbarch_data (gdbarch, frame_base_data);
  107.   struct frame_base_table_entry *entry;

  109.   for (entry = table->head; entry != NULL; entry = entry->next)
  110.     {
  111.       const struct frame_base *desc = NULL;

  113.       desc = entry->sniffer (this_frame);
  114.       if (desc != NULL)
  115.         return desc;
  116.     }
  117.   return table->default_base;
  118. }

  120. extern initialize_file_ftype _initialize_frame_base; /* -Wmissing-prototypes */

  122. void
  123. ‌_initialize_frame_base (void)
  124. {
  125.   frame_base_data = gdbarch_data_register_pre_init (frame_base_init);
  126. }