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 #ifndef _DEBUGGERD_TEST_BACKTRACE_MOCK_H 18 #define _DEBUGGERD_TEST_BACKTRACE_MOCK_H 19 20 #include <stdint.h> 21 #include <stdlib.h> 22 #include <string.h> 23 #include <sys/ucontext.h> 24 25 #include <string> 26 #include <vector> 27 28 #include <backtrace/Backtrace.h> 29 #include <backtrace/BacktraceMap.h> 30 31 class BacktraceMapMock : public BacktraceMap { 32 public: 33 BacktraceMapMock() : BacktraceMap(0) {} 34 virtual ~BacktraceMapMock() {} 35 36 void AddMap(backtrace_map_t& map) { 37 maps_.push_back(map); 38 } 39 }; 40 41 42 class BacktraceMock : public Backtrace { 43 public: 44 BacktraceMock(BacktraceMapMock* map) : Backtrace(0, 0, map) { 45 if (map_ == nullptr) { 46 abort(); 47 } 48 } 49 virtual ~BacktraceMock() {} 50 51 virtual bool Unwind(size_t, ucontext_t*) { return false; } 52 virtual bool ReadWord(uintptr_t, word_t*) { return false;} 53 54 virtual std::string GetFunctionNameRaw(uintptr_t, uintptr_t*) { return ""; } 55 56 virtual size_t Read(uintptr_t addr, uint8_t* buffer, size_t bytes) { 57 size_t offset = 0; 58 if (last_read_addr_ > 0) { 59 offset = addr - last_read_addr_; 60 } 61 size_t bytes_available = buffer_.size() - offset; 62 63 if (do_partial_read_) { 64 // Do a partial read. 65 if (bytes > bytes_partial_read_) { 66 bytes = bytes_partial_read_; 67 } 68 bytes_partial_read_ -= bytes; 69 // Only support a single partial read. 70 do_partial_read_ = false; 71 } else if (bytes > bytes_available) { 72 bytes = bytes_available; 73 } 74 75 if (bytes > 0) { 76 memcpy(buffer, buffer_.data() + offset, bytes); 77 } 78 79 last_read_addr_ = addr; 80 return bytes; 81 } 82 83 void SetReadData(uint8_t* buffer, size_t bytes) { 84 buffer_.resize(bytes); 85 memcpy(buffer_.data(), buffer, bytes); 86 bytes_partial_read_ = 0; 87 do_partial_read_ = false; 88 last_read_addr_ = 0; 89 } 90 91 void SetPartialReadAmount(size_t bytes) { 92 if (bytes > buffer_.size()) { 93 abort(); 94 } 95 bytes_partial_read_ = bytes; 96 do_partial_read_ = true; 97 } 98 99 private: 100 std::vector<uint8_t> buffer_; 101 size_t bytes_partial_read_ = 0; 102 uintptr_t last_read_addr_ = 0; 103 bool do_partial_read_ = false; 104 }; 105 106 #endif // _DEBUGGERD_TEST_BACKTRACE_MOCK_H 107
