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 29 void backtrace_fake_clear_all() { 30 g_fake_backtrace.clear(); 31 } 32 33 void backtrace_fake_add(const std::vector<uintptr_t>& ips) { 34 g_fake_backtrace.push_back(ips); 35 } 36 37 void backtrace_startup() { 38 } 39 40 void backtrace_shutdown() { 41 } 42 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 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
