1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdint.h>
18
19#include <deque>
20#include <vector>
21#include <utility>
22
23#include "backtrace.h"
24#include "backtrace_fake.h"
25#include "debug_log.h"
26
27static std::deque<std::vector<uintptr_t>> g_fake_backtrace;
28
29void backtrace_fake_clear_all() {
30  g_fake_backtrace.clear();
31}
32
33void backtrace_fake_add(const std::vector<uintptr_t>& ips) {
34  g_fake_backtrace.push_back(ips);
35}
36
37void backtrace_startup() {
38}
39
40void backtrace_shutdown() {
41}
42
43size_t backtrace_get(uintptr_t* frames, size_t frame_num) {
44  if (frame_num == 0 || g_fake_backtrace.size() == 0) {
45    return 0;
46  }
47
48  size_t ips_size = g_fake_backtrace[0].size();
49  size_t total_frames = (frame_num < ips_size) ? frame_num : ips_size;
50  memcpy(frames, g_fake_backtrace[0].data(), sizeof(uintptr_t) * total_frames);
51  g_fake_backtrace.pop_front();
52  return total_frames;
53}
54
55void backtrace_log(const uintptr_t* frames, size_t frame_count) {
56  for (size_t i = 0; i < frame_count; i++) {
57    error_log("  #%02zd pc %p", i, reinterpret_cast<void*>(frames[i]));
58  }
59}
60