1 /* 2 * Copyright (C) 2017 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 <string> 21 22 #include <unwindstack/Elf.h> 23 #include <unwindstack/ElfInterface.h> 24 #include <unwindstack/Memory.h> 25 #include <unwindstack/Regs.h> 26 27 #include "ElfFake.h" 28 #include "RegsFake.h" 29 30 namespace unwindstack { 31 32 std::deque<FunctionData> ElfInterfaceFake::functions_; 33 std::deque<StepData> ElfInterfaceFake::steps_; 34 35 bool ElfInterfaceFake::GetFunctionName(uint64_t, uint64_t, std::string* name, uint64_t* offset) { 36 if (functions_.empty()) { 37 return false; 38 } 39 auto entry = functions_.front(); 40 functions_.pop_front(); 41 *name = entry.name; 42 *offset = entry.offset; 43 return true; 44 } 45 46 bool ElfInterfaceFake::GetGlobalVariable(const std::string& global, uint64_t* offset) { 47 auto entry = globals_.find(global); 48 if (entry == globals_.end()) { 49 return false; 50 } 51 *offset = entry->second; 52 return true; 53 } 54 55 bool ElfInterfaceFake::Step(uint64_t, uint64_t, Regs* regs, Memory*, bool* finished) { 56 if (steps_.empty()) { 57 return false; 58 } 59 auto entry = steps_.front(); 60 steps_.pop_front(); 61 62 if (entry.pc == 0 && entry.sp == 0 && !entry.finished) { 63 // Pretend as though there is no frame. 64 return false; 65 } 66 67 RegsFake* fake_regs = reinterpret_cast<RegsFake*>(regs); 68 fake_regs->set_pc(entry.pc); 69 fake_regs->set_sp(entry.sp); 70 *finished = entry.finished; 71 return true; 72 } 73 74 } // namespace unwindstack 75
