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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <stdint.h>
#include <unwindstack/Elf.h>
#include <unwindstack/Memory.h>
#include <unwindstack/Regs.h>
#include "Check.h"
namespace unwindstack {
class RegsFake : public Regs {
public:
RegsFake(uint16_t total_regs) : Regs(total_regs, Regs::Location(Regs::LOCATION_UNKNOWN, 0)) {}
virtual ~RegsFake() = default;
ArchEnum Arch() override { return fake_arch_; }
void* RawData() override { return nullptr; }
uint64_t pc() override { return fake_pc_; }
uint64_t sp() override { return fake_sp_; }
void set_pc(uint64_t pc) override { fake_pc_ = pc; }
void set_sp(uint64_t sp) override { fake_sp_ = sp; }
bool SetPcFromReturnAddress(Memory*) override {
if (!fake_return_address_valid_) {
return false;
}
fake_pc_ = fake_return_address_;
return true;
}
void IterateRegisters(std::function<void(const char*, uint64_t)>) override {}
bool Is32Bit() {
CHECK(fake_arch_ != ARCH_UNKNOWN);
return fake_arch_ == ARCH_ARM || fake_arch_ == ARCH_X86 || fake_arch_ == ARCH_MIPS;
}
bool StepIfSignalHandler(uint64_t, Elf*, Memory*) override { return false; }
void FakeSetArch(ArchEnum arch) { fake_arch_ = arch; }
void FakeSetDexPc(uint64_t dex_pc) { dex_pc_ = dex_pc; }
void FakeSetReturnAddress(uint64_t return_address) { fake_return_address_ = return_address; }
void FakeSetReturnAddressValid(bool valid) { fake_return_address_valid_ = valid; }
Regs* Clone() override { return nullptr; }
private:
ArchEnum fake_arch_ = ARCH_UNKNOWN;
uint64_t fake_pc_ = 0;
uint64_t fake_sp_ = 0;
bool fake_return_address_valid_ = false;
uint64_t fake_return_address_ = 0;
};
template <typename TypeParam>
class RegsImplFake : public RegsImpl<TypeParam> {
public:
RegsImplFake(uint16_t total_regs)
: RegsImpl<TypeParam>(total_regs, Regs::Location(Regs::LOCATION_UNKNOWN, 0)) {}
virtual ~RegsImplFake() = default;
ArchEnum Arch() override { return ARCH_UNKNOWN; }
uint64_t pc() override { return fake_pc_; }
uint64_t sp() override { return fake_sp_; }
void set_pc(uint64_t pc) override { fake_pc_ = pc; }
void set_sp(uint64_t sp) override { fake_sp_ = sp; }
void set_pseudo_reg(uint64_t reg) { fake_pseudo_reg_ = reg; }
bool SetPcFromReturnAddress(Memory*) override { return false; }
bool StepIfSignalHandler(uint64_t, Elf*, Memory*) override { return false; }
bool SetPseudoRegister(uint16_t reg, uint64_t value) override {
if (fake_pseudo_reg_ != reg) {
return false;
}
fake_pseudo_reg_value_ = value;
return true;
}
bool GetPseudoRegister(uint16_t reg, uint64_t* value) override {
if (fake_pseudo_reg_ != reg) {
return false;
}
*value = fake_pseudo_reg_value_;
return true;
}
Regs* Clone() override { return nullptr; }
private:
uint64_t fake_pc_ = 0;
uint64_t fake_sp_ = 0;
uint16_t fake_pseudo_reg_ = 0;
uint64_t fake_pseudo_reg_value_ = 0;
};
} // namespace unwindstack
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