| /* libunwind - a platform-independent unwind library |
| Copyright (C) 2014 The Android Open Source Project |
| |
| This file is part of libunwind. |
| |
| Permission is hereby granted, free of charge, to any person obtaining |
| a copy of this software and associated documentation files (the |
| "Software"), to deal in the Software without restriction, including |
| without limitation the rights to use, copy, modify, merge, publish, |
| distribute, sublicense, and/or sell copies of the Software, and to |
| permit persons to whom the Software is furnished to do so, subject to |
| the following conditions: |
| |
| The above copyright notice and this permission notice shall be |
| included in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ |
| |
| #include <libunwind.h> |
| #include "libunwind_i.h" |
| |
| HIDDEN int map_init_done = 0; |
| HIDDEN define_lock (map_init_lock); |
| HIDDEN struct mempool map_pool; |
| |
| PROTECTED void |
| unw_map_set (unw_addr_space_t as, unw_map_cursor_t *map_cursor) |
| { |
| if (map_cursor != NULL) |
| as->map_list = map_cursor->map_list; |
| else |
| as->map_list = NULL; |
| } |
| |
| PROTECTED int |
| unw_map_cursor_create (unw_map_cursor_t *map_cursor, pid_t pid) |
| { |
| map_cursor->map_list = map_create_list (UNW_MAP_CREATE_REMOTE, pid); |
| |
| return map_cursor->map_list == NULL; |
| } |
| |
| PROTECTED void |
| unw_map_cursor_destroy (unw_map_cursor_t *map_cursor) |
| { |
| map_destroy_list (map_cursor->map_list); |
| } |
| |
| PROTECTED void |
| unw_map_cursor_reset (unw_map_cursor_t *map_cursor) |
| { |
| map_cursor->cur_map = map_cursor->map_list; |
| } |
| |
| PROTECTED void |
| unw_map_cursor_clear (unw_map_cursor_t *cursor_map) |
| { |
| cursor_map->map_list = NULL; |
| cursor_map->cur_map = NULL; |
| } |
| |
| PROTECTED int |
| unw_map_cursor_get_next (unw_map_cursor_t *map_cursor, unw_map_t *unw_map) |
| { |
| struct map_info *map_info = map_cursor->cur_map; |
| |
| if (map_info == NULL) |
| return 0; |
| |
| unw_map->start = map_info->start; |
| unw_map->end = map_info->end; |
| unw_map->offset = map_info->offset; |
| unw_map->load_base = map_info->load_base; |
| unw_map->flags = map_info->flags; |
| unw_map->path = map_info->path; |
| |
| map_cursor->cur_map = map_info->next; |
| |
| return 1; |
| } |
| |
| HIDDEN struct map_info * |
| map_alloc_info (void) |
| { |
| if (!map_init_done) |
| { |
| intrmask_t saved_mask; |
| |
| lock_acquire (&map_init_lock, saved_mask); |
| /* Check again under the lock. */ |
| if (!map_init_done) |
| { |
| mempool_init (&map_pool, sizeof(struct map_info), 0); |
| map_init_done = 1; |
| } |
| lock_release (&map_init_lock, saved_mask); |
| } |
| return mempool_alloc (&map_pool); |
| } |
| |
| HIDDEN void |
| map_free_info (struct map_info *map) |
| { |
| mempool_free (&map_pool, map); |
| } |
| |
| HIDDEN void |
| map_destroy_list (struct map_info *map_info) |
| { |
| struct map_info *map; |
| while (map_info) |
| { |
| map = map_info; |
| map_info = map->next; |
| if (map->ei.mapped) |
| munmap (map->ei.u.mapped.image, map->ei.u.mapped.size); |
| if (map->path) |
| free (map->path); |
| if (map->ei.mini_debug_info_data) { |
| Debug(1, "Freed cached .gnu_debugdata"); |
| free (map->ei.mini_debug_info_data); |
| } |
| map_free_info (map); |
| } |
| } |
| |
| HIDDEN struct map_info * |
| map_find_from_addr (struct map_info *map_list, unw_word_t addr) |
| { |
| while (map_list) |
| { |
| if (addr >= map_list->start && addr < map_list->end) |
| return map_list; |
| map_list = map_list->next; |
| } |
| return NULL; |
| } |