451 lines
13 KiB
C++
451 lines
13 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdint.h>
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#include <gtest/gtest.h>
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#include <unwindstack/Elf.h>
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#include <unwindstack/ElfInterface.h>
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#include <unwindstack/MapInfo.h>
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#include <unwindstack/Regs.h>
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#include "Machine.h"
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#include "MemoryFake.h"
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namespace unwindstack {
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class ElfFake : public Elf {
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public:
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ElfFake(Memory* memory) : Elf(memory) { valid_ = true; }
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virtual ~ElfFake() = default;
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void set_elf_interface(ElfInterface* interface) { interface_.reset(interface); }
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};
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class ElfInterfaceFake : public ElfInterface {
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public:
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ElfInterfaceFake(Memory* memory) : ElfInterface(memory) {}
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virtual ~ElfInterfaceFake() = default;
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void set_load_bias(uint64_t load_bias) { load_bias_ = load_bias; }
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bool Init() override { return false; }
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void InitHeaders() override {}
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bool GetSoname(std::string*) override { return false; }
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bool GetFunctionName(uint64_t, std::string*, uint64_t*) override { return false; }
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bool Step(uint64_t, Regs*, Memory*) override { return false; }
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};
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template <typename TypeParam>
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class RegsTestImpl : public RegsImpl<TypeParam> {
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public:
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RegsTestImpl(uint16_t total_regs, uint16_t regs_sp)
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: RegsImpl<TypeParam>(total_regs, regs_sp, Regs::Location(Regs::LOCATION_UNKNOWN, 0)) {}
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RegsTestImpl(uint16_t total_regs, uint16_t regs_sp, Regs::Location return_loc)
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: RegsImpl<TypeParam>(total_regs, regs_sp, return_loc) {}
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virtual ~RegsTestImpl() = default;
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uint64_t GetAdjustedPc(uint64_t, Elf*) override { return 0; }
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void SetFromRaw() override {}
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bool StepIfSignalHandler(Memory*) override { return false; }
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};
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class RegsTest : public ::testing::Test {
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protected:
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void SetUp() override {
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memory_ = new MemoryFake;
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elf_.reset(new ElfFake(memory_));
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elf_interface_ = new ElfInterfaceFake(elf_->memory());
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elf_->set_elf_interface(elf_interface_);
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}
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template <typename AddressType>
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void RegsReturnAddressRegister();
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void ArmStepIfSignalHandlerNonRt(uint32_t pc_data);
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void ArmStepIfSignalHandlerRt(uint32_t pc_data);
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ElfInterfaceFake* elf_interface_;
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MemoryFake* memory_;
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std::unique_ptr<ElfFake> elf_;
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};
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TEST_F(RegsTest, regs32) {
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RegsTestImpl<uint32_t> regs32(50, 10);
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ASSERT_EQ(50U, regs32.total_regs());
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ASSERT_EQ(10U, regs32.sp_reg());
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uint32_t* raw = reinterpret_cast<uint32_t*>(regs32.RawData());
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for (size_t i = 0; i < 50; i++) {
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raw[i] = 0xf0000000 + i;
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}
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regs32.set_pc(0xf0120340);
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regs32.set_sp(0xa0ab0cd0);
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for (size_t i = 0; i < 50; i++) {
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ASSERT_EQ(0xf0000000U + i, regs32[i]) << "Failed comparing register " << i;
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}
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ASSERT_EQ(0xf0120340U, regs32.pc());
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ASSERT_EQ(0xa0ab0cd0U, regs32.sp());
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regs32[32] = 10;
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ASSERT_EQ(10U, regs32[32]);
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}
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TEST_F(RegsTest, regs64) {
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RegsTestImpl<uint64_t> regs64(30, 12);
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ASSERT_EQ(30U, regs64.total_regs());
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ASSERT_EQ(12U, regs64.sp_reg());
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uint64_t* raw = reinterpret_cast<uint64_t*>(regs64.RawData());
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for (size_t i = 0; i < 30; i++) {
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raw[i] = 0xf123456780000000UL + i;
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}
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regs64.set_pc(0xf123456780102030UL);
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regs64.set_sp(0xa123456780a0b0c0UL);
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for (size_t i = 0; i < 30; i++) {
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ASSERT_EQ(0xf123456780000000U + i, regs64[i]) << "Failed reading register " << i;
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}
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ASSERT_EQ(0xf123456780102030UL, regs64.pc());
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ASSERT_EQ(0xa123456780a0b0c0UL, regs64.sp());
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regs64[8] = 10;
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ASSERT_EQ(10U, regs64[8]);
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}
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template <typename AddressType>
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void RegsTest::RegsReturnAddressRegister() {
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RegsTestImpl<AddressType> regs(20, 10, Regs::Location(Regs::LOCATION_REGISTER, 5));
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regs[5] = 0x12345;
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uint64_t value;
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ASSERT_TRUE(regs.GetReturnAddressFromDefault(memory_, &value));
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ASSERT_EQ(0x12345U, value);
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}
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TEST_F(RegsTest, regs32_return_address_register) {
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RegsReturnAddressRegister<uint32_t>();
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}
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TEST_F(RegsTest, regs64_return_address_register) {
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RegsReturnAddressRegister<uint64_t>();
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}
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TEST_F(RegsTest, regs32_return_address_sp_offset) {
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RegsTestImpl<uint32_t> regs(20, 10, Regs::Location(Regs::LOCATION_SP_OFFSET, -2));
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regs.set_sp(0x2002);
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memory_->SetData32(0x2000, 0x12345678);
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uint64_t value;
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ASSERT_TRUE(regs.GetReturnAddressFromDefault(memory_, &value));
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ASSERT_EQ(0x12345678U, value);
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}
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TEST_F(RegsTest, regs64_return_address_sp_offset) {
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RegsTestImpl<uint64_t> regs(20, 10, Regs::Location(Regs::LOCATION_SP_OFFSET, -8));
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regs.set_sp(0x2008);
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memory_->SetData64(0x2000, 0x12345678aabbccddULL);
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uint64_t value;
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ASSERT_TRUE(regs.GetReturnAddressFromDefault(memory_, &value));
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ASSERT_EQ(0x12345678aabbccddULL, value);
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}
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TEST_F(RegsTest, rel_pc) {
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RegsArm64 arm64;
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ASSERT_EQ(0xcU, arm64.GetAdjustedPc(0x10, elf_.get()));
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ASSERT_EQ(0x0U, arm64.GetAdjustedPc(0x4, elf_.get()));
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ASSERT_EQ(0x3U, arm64.GetAdjustedPc(0x3, elf_.get()));
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ASSERT_EQ(0x2U, arm64.GetAdjustedPc(0x2, elf_.get()));
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ASSERT_EQ(0x1U, arm64.GetAdjustedPc(0x1, elf_.get()));
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ASSERT_EQ(0x0U, arm64.GetAdjustedPc(0x0, elf_.get()));
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RegsX86 x86;
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ASSERT_EQ(0xffU, x86.GetAdjustedPc(0x100, elf_.get()));
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ASSERT_EQ(0x1U, x86.GetAdjustedPc(0x2, elf_.get()));
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ASSERT_EQ(0x0U, x86.GetAdjustedPc(0x1, elf_.get()));
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ASSERT_EQ(0x0U, x86.GetAdjustedPc(0x0, elf_.get()));
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RegsX86_64 x86_64;
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ASSERT_EQ(0xffU, x86_64.GetAdjustedPc(0x100, elf_.get()));
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ASSERT_EQ(0x1U, x86_64.GetAdjustedPc(0x2, elf_.get()));
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ASSERT_EQ(0x0U, x86_64.GetAdjustedPc(0x1, elf_.get()));
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ASSERT_EQ(0x0U, x86_64.GetAdjustedPc(0x0, elf_.get()));
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}
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TEST_F(RegsTest, rel_pc_arm) {
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RegsArm arm;
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// Check fence posts.
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elf_interface_->set_load_bias(0);
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ASSERT_EQ(3U, arm.GetAdjustedPc(0x5, elf_.get()));
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ASSERT_EQ(4U, arm.GetAdjustedPc(0x4, elf_.get()));
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ASSERT_EQ(3U, arm.GetAdjustedPc(0x3, elf_.get()));
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ASSERT_EQ(2U, arm.GetAdjustedPc(0x2, elf_.get()));
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ASSERT_EQ(1U, arm.GetAdjustedPc(0x1, elf_.get()));
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ASSERT_EQ(0U, arm.GetAdjustedPc(0x0, elf_.get()));
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elf_interface_->set_load_bias(0x100);
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ASSERT_EQ(0xffU, arm.GetAdjustedPc(0xff, elf_.get()));
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ASSERT_EQ(0x103U, arm.GetAdjustedPc(0x105, elf_.get()));
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ASSERT_EQ(0x104U, arm.GetAdjustedPc(0x104, elf_.get()));
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ASSERT_EQ(0x103U, arm.GetAdjustedPc(0x103, elf_.get()));
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ASSERT_EQ(0x102U, arm.GetAdjustedPc(0x102, elf_.get()));
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ASSERT_EQ(0x101U, arm.GetAdjustedPc(0x101, elf_.get()));
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ASSERT_EQ(0x100U, arm.GetAdjustedPc(0x100, elf_.get()));
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// Check thumb instructions handling.
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elf_interface_->set_load_bias(0);
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memory_->SetData32(0x2000, 0);
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ASSERT_EQ(0x2003U, arm.GetAdjustedPc(0x2005, elf_.get()));
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memory_->SetData32(0x2000, 0xe000f000);
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ASSERT_EQ(0x2001U, arm.GetAdjustedPc(0x2005, elf_.get()));
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elf_interface_->set_load_bias(0x400);
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memory_->SetData32(0x2100, 0);
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ASSERT_EQ(0x2503U, arm.GetAdjustedPc(0x2505, elf_.get()));
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memory_->SetData32(0x2100, 0xf111f111);
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ASSERT_EQ(0x2501U, arm.GetAdjustedPc(0x2505, elf_.get()));
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}
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TEST_F(RegsTest, elf_invalid) {
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Elf invalid_elf(new MemoryFake);
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RegsArm regs_arm;
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RegsArm64 regs_arm64;
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RegsX86 regs_x86;
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RegsX86_64 regs_x86_64;
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MapInfo map_info{.start = 0x1000, .end = 0x2000};
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regs_arm.set_pc(0x1500);
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ASSERT_EQ(0x500U, invalid_elf.GetRelPc(regs_arm.pc(), &map_info));
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ASSERT_EQ(0x500U, regs_arm.GetAdjustedPc(0x500U, &invalid_elf));
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regs_arm64.set_pc(0x1600);
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ASSERT_EQ(0x600U, invalid_elf.GetRelPc(regs_arm64.pc(), &map_info));
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ASSERT_EQ(0x600U, regs_arm64.GetAdjustedPc(0x600U, &invalid_elf));
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regs_x86.set_pc(0x1700);
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ASSERT_EQ(0x700U, invalid_elf.GetRelPc(regs_x86.pc(), &map_info));
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ASSERT_EQ(0x700U, regs_x86.GetAdjustedPc(0x700U, &invalid_elf));
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regs_x86_64.set_pc(0x1800);
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ASSERT_EQ(0x800U, invalid_elf.GetRelPc(regs_x86_64.pc(), &map_info));
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ASSERT_EQ(0x800U, regs_x86_64.GetAdjustedPc(0x800U, &invalid_elf));
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}
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TEST_F(RegsTest, arm_set_from_raw) {
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RegsArm arm;
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uint32_t* regs = reinterpret_cast<uint32_t*>(arm.RawData());
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regs[13] = 0x100;
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regs[15] = 0x200;
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arm.SetFromRaw();
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EXPECT_EQ(0x100U, arm.sp());
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EXPECT_EQ(0x200U, arm.pc());
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}
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TEST_F(RegsTest, arm64_set_from_raw) {
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RegsArm64 arm64;
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uint64_t* regs = reinterpret_cast<uint64_t*>(arm64.RawData());
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regs[31] = 0xb100000000ULL;
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regs[32] = 0xc200000000ULL;
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arm64.SetFromRaw();
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EXPECT_EQ(0xb100000000U, arm64.sp());
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EXPECT_EQ(0xc200000000U, arm64.pc());
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}
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TEST_F(RegsTest, x86_set_from_raw) {
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RegsX86 x86;
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uint32_t* regs = reinterpret_cast<uint32_t*>(x86.RawData());
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regs[4] = 0x23450000;
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regs[8] = 0xabcd0000;
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x86.SetFromRaw();
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EXPECT_EQ(0x23450000U, x86.sp());
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EXPECT_EQ(0xabcd0000U, x86.pc());
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}
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TEST_F(RegsTest, x86_64_set_from_raw) {
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RegsX86_64 x86_64;
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uint64_t* regs = reinterpret_cast<uint64_t*>(x86_64.RawData());
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regs[7] = 0x1200000000ULL;
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regs[16] = 0x4900000000ULL;
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x86_64.SetFromRaw();
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EXPECT_EQ(0x1200000000U, x86_64.sp());
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EXPECT_EQ(0x4900000000U, x86_64.pc());
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}
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void RegsTest::ArmStepIfSignalHandlerNonRt(uint32_t pc_data) {
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uint64_t addr = 0x1000;
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RegsArm regs;
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regs[ARM_REG_PC] = 0x5000;
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regs[ARM_REG_SP] = addr;
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regs.SetFromRaw();
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memory_->SetData32(0x5000, pc_data);
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for (uint64_t index = 0; index <= 30; index++) {
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memory_->SetData32(addr + index * 4, index * 0x10);
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}
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ASSERT_TRUE(regs.StepIfSignalHandler(memory_));
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EXPECT_EQ(0x100U, regs[ARM_REG_SP]);
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EXPECT_EQ(0x120U, regs[ARM_REG_PC]);
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EXPECT_EQ(0x100U, regs.sp());
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EXPECT_EQ(0x120U, regs.pc());
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}
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TEST_F(RegsTest, arm_step_if_signal_handler_non_rt) {
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// Form 1
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ArmStepIfSignalHandlerNonRt(0xe3a07077);
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// Form 2
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ArmStepIfSignalHandlerNonRt(0xef900077);
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// Form 3
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ArmStepIfSignalHandlerNonRt(0xdf002777);
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}
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void RegsTest::ArmStepIfSignalHandlerRt(uint32_t pc_data) {
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uint64_t addr = 0x1000;
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RegsArm regs;
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regs[ARM_REG_PC] = 0x5000;
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regs[ARM_REG_SP] = addr;
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regs.SetFromRaw();
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memory_->SetData32(0x5000, pc_data);
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for (uint64_t index = 0; index <= 100; index++) {
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memory_->SetData32(addr + index * 4, index * 0x10);
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}
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ASSERT_TRUE(regs.StepIfSignalHandler(memory_));
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EXPECT_EQ(0x350U, regs[ARM_REG_SP]);
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EXPECT_EQ(0x370U, regs[ARM_REG_PC]);
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EXPECT_EQ(0x350U, regs.sp());
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EXPECT_EQ(0x370U, regs.pc());
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}
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TEST_F(RegsTest, arm_step_if_signal_handler_rt) {
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// Form 1
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ArmStepIfSignalHandlerRt(0xe3a070ad);
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// Form 2
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ArmStepIfSignalHandlerRt(0xef9000ad);
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// Form 3
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ArmStepIfSignalHandlerRt(0xdf0027ad);
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}
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TEST_F(RegsTest, arm64_step_if_signal_handler) {
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uint64_t addr = 0x1000;
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RegsArm64 regs;
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regs[ARM64_REG_PC] = 0x8000;
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regs[ARM64_REG_SP] = addr;
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regs.SetFromRaw();
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memory_->SetData64(0x8000, 0xd4000001d2801168ULL);
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for (uint64_t index = 0; index <= 100; index++) {
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memory_->SetData64(addr + index * 8, index * 0x10);
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}
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ASSERT_TRUE(regs.StepIfSignalHandler(memory_));
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EXPECT_EQ(0x460U, regs[ARM64_REG_SP]);
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EXPECT_EQ(0x470U, regs[ARM64_REG_PC]);
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EXPECT_EQ(0x460U, regs.sp());
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EXPECT_EQ(0x470U, regs.pc());
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}
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TEST_F(RegsTest, x86_step_if_signal_handler_no_siginfo) {
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uint64_t addr = 0xa00;
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RegsX86 regs;
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regs[X86_REG_EIP] = 0x4100;
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regs[X86_REG_ESP] = addr;
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regs.SetFromRaw();
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memory_->SetData64(0x4100, 0x80cd00000077b858ULL);
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for (uint64_t index = 0; index <= 25; index++) {
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memory_->SetData32(addr + index * 4, index * 0x10);
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}
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ASSERT_TRUE(regs.StepIfSignalHandler(memory_));
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EXPECT_EQ(0x70U, regs[X86_REG_EBP]);
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EXPECT_EQ(0x80U, regs[X86_REG_ESP]);
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EXPECT_EQ(0x90U, regs[X86_REG_EBX]);
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EXPECT_EQ(0xa0U, regs[X86_REG_EDX]);
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EXPECT_EQ(0xb0U, regs[X86_REG_ECX]);
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EXPECT_EQ(0xc0U, regs[X86_REG_EAX]);
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EXPECT_EQ(0xf0U, regs[X86_REG_EIP]);
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EXPECT_EQ(0x80U, regs.sp());
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EXPECT_EQ(0xf0U, regs.pc());
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}
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TEST_F(RegsTest, x86_step_if_signal_handler_siginfo) {
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uint64_t addr = 0xa00;
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RegsX86 regs;
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regs[X86_REG_EIP] = 0x4100;
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regs[X86_REG_ESP] = addr;
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regs.SetFromRaw();
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memory_->SetData64(0x4100, 0x0080cd000000adb8ULL);
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addr += 8;
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// Pointer to ucontext data.
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memory_->SetData32(addr, 0x8100);
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addr = 0x8100;
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for (uint64_t index = 0; index <= 30; index++) {
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memory_->SetData32(addr + index * 4, index * 0x10);
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}
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ASSERT_TRUE(regs.StepIfSignalHandler(memory_));
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EXPECT_EQ(0xb0U, regs[X86_REG_EBP]);
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EXPECT_EQ(0xc0U, regs[X86_REG_ESP]);
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EXPECT_EQ(0xd0U, regs[X86_REG_EBX]);
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EXPECT_EQ(0xe0U, regs[X86_REG_EDX]);
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EXPECT_EQ(0xf0U, regs[X86_REG_ECX]);
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EXPECT_EQ(0x100U, regs[X86_REG_EAX]);
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EXPECT_EQ(0x130U, regs[X86_REG_EIP]);
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EXPECT_EQ(0xc0U, regs.sp());
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EXPECT_EQ(0x130U, regs.pc());
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}
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TEST_F(RegsTest, x86_64_step_if_signal_handler) {
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uint64_t addr = 0x500;
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RegsX86_64 regs;
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regs[X86_64_REG_RIP] = 0x7000;
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regs[X86_64_REG_RSP] = addr;
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regs.SetFromRaw();
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memory_->SetData64(0x7000, 0x0f0000000fc0c748);
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memory_->SetData16(0x7008, 0x0f05);
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for (uint64_t index = 0; index <= 30; index++) {
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memory_->SetData64(addr + index * 8, index * 0x10);
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}
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ASSERT_TRUE(regs.StepIfSignalHandler(memory_));
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EXPECT_EQ(0x140U, regs[X86_64_REG_RSP]);
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EXPECT_EQ(0x150U, regs[X86_64_REG_RIP]);
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EXPECT_EQ(0x140U, regs.sp());
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EXPECT_EQ(0x150U, regs.pc());
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}
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} // namespace unwindstack
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