1 /* 2 * Copyright (C) 2016 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 #pragma once 18 19 #include <stdint.h> 20 21 #include <unwindstack/Elf.h> 22 #include <unwindstack/Memory.h> 23 #include <unwindstack/Regs.h> 24 25 #include "Check.h" 26 27 namespace unwindstack { 28 29 class RegsFake : public Regs { 30 public: RegsFake(uint16_t total_regs)31 RegsFake(uint16_t total_regs) : Regs(total_regs, Regs::Location(Regs::LOCATION_UNKNOWN, 0)) {} 32 virtual ~RegsFake() = default; 33 Arch()34 ArchEnum Arch() override { return fake_arch_; } RawData()35 void* RawData() override { return nullptr; } pc()36 uint64_t pc() override { return fake_pc_; } sp()37 uint64_t sp() override { return fake_sp_; } set_pc(uint64_t pc)38 void set_pc(uint64_t pc) override { fake_pc_ = pc; } set_sp(uint64_t sp)39 void set_sp(uint64_t sp) override { fake_sp_ = sp; } 40 SetPcFromReturnAddress(Memory *)41 bool SetPcFromReturnAddress(Memory*) override { 42 if (!fake_return_address_valid_) { 43 return false; 44 } 45 fake_pc_ = fake_return_address_; 46 return true; 47 } 48 IterateRegisters(std::function<void (const char *,uint64_t)>)49 void IterateRegisters(std::function<void(const char*, uint64_t)>) override {} 50 Is32Bit()51 bool Is32Bit() { 52 CHECK(fake_arch_ != ARCH_UNKNOWN); 53 return fake_arch_ == ARCH_ARM || fake_arch_ == ARCH_X86; 54 } 55 StepIfSignalHandler(uint64_t,Elf *,Memory *)56 bool StepIfSignalHandler(uint64_t, Elf*, Memory*) override { return false; } 57 FakeSetArch(ArchEnum arch)58 void FakeSetArch(ArchEnum arch) { fake_arch_ = arch; } FakeSetDexPc(uint64_t dex_pc)59 void FakeSetDexPc(uint64_t dex_pc) { dex_pc_ = dex_pc; } FakeSetReturnAddress(uint64_t return_address)60 void FakeSetReturnAddress(uint64_t return_address) { fake_return_address_ = return_address; } FakeSetReturnAddressValid(bool valid)61 void FakeSetReturnAddressValid(bool valid) { fake_return_address_valid_ = valid; } 62 Clone()63 Regs* Clone() override { return nullptr; } 64 65 private: 66 ArchEnum fake_arch_ = ARCH_UNKNOWN; 67 uint64_t fake_pc_ = 0; 68 uint64_t fake_sp_ = 0; 69 bool fake_return_address_valid_ = false; 70 uint64_t fake_return_address_ = 0; 71 }; 72 73 template <typename TypeParam> 74 class RegsImplFake : public RegsImpl<TypeParam> { 75 public: RegsImplFake(uint16_t total_regs)76 RegsImplFake(uint16_t total_regs) 77 : RegsImpl<TypeParam>(total_regs, Regs::Location(Regs::LOCATION_UNKNOWN, 0)) {} 78 virtual ~RegsImplFake() = default; 79 Arch()80 ArchEnum Arch() override { return ARCH_UNKNOWN; } pc()81 uint64_t pc() override { return fake_pc_; } sp()82 uint64_t sp() override { return fake_sp_; } set_pc(uint64_t pc)83 void set_pc(uint64_t pc) override { fake_pc_ = pc; } set_sp(uint64_t sp)84 void set_sp(uint64_t sp) override { fake_sp_ = sp; } set_pseudo_reg(uint64_t reg)85 void set_pseudo_reg(uint64_t reg) { fake_pseudo_reg_ = reg; } 86 SetPcFromReturnAddress(Memory *)87 bool SetPcFromReturnAddress(Memory*) override { return false; } StepIfSignalHandler(uint64_t,Elf *,Memory *)88 bool StepIfSignalHandler(uint64_t, Elf*, Memory*) override { return false; } 89 SetPseudoRegister(uint16_t reg,uint64_t value)90 bool SetPseudoRegister(uint16_t reg, uint64_t value) override { 91 if (fake_pseudo_reg_ != reg) { 92 return false; 93 } 94 fake_pseudo_reg_value_ = value; 95 return true; 96 } GetPseudoRegister(uint16_t reg,uint64_t * value)97 bool GetPseudoRegister(uint16_t reg, uint64_t* value) override { 98 if (fake_pseudo_reg_ != reg) { 99 return false; 100 } 101 *value = fake_pseudo_reg_value_; 102 return true; 103 } 104 Clone()105 Regs* Clone() override { return nullptr; } 106 107 private: 108 uint64_t fake_pc_ = 0; 109 uint64_t fake_sp_ = 0; 110 uint16_t fake_pseudo_reg_ = 0; 111 uint64_t fake_pseudo_reg_value_ = 0; 112 }; 113 114 } // namespace unwindstack 115