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