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
27 static std::deque<std::vector<uintptr_t>> g_fake_backtrace;
28
backtrace_fake_clear_all()29 void backtrace_fake_clear_all() {
30 g_fake_backtrace.clear();
31 }
32
backtrace_fake_add(const std::vector<uintptr_t> & ips)33 void backtrace_fake_add(const std::vector<uintptr_t>& ips) {
34 g_fake_backtrace.push_back(ips);
35 }
36
backtrace_startup()37 void backtrace_startup() {
38 }
39
backtrace_shutdown()40 void backtrace_shutdown() {
41 }
42
backtrace_get(uintptr_t * frames,size_t frame_num)43 size_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
backtrace_log(const uintptr_t * frames,size_t frame_count)55 void 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