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platform_system_core/libunwindstack/tests/RegsTest.cpp
Josh Gao 0953ecd03a libunwindstack: make machine type a property of Regs. 
There are no actual users of the machine type output parameter to
Regs::RemoteGet. The concrete implementations of Regs know what machine
type they represent anyway, so provide an accessor to query.

Test: treehugger
Test: libunwindstack tests on 32/64-bit host, hikey960
Change-Id: Ia25910531d36c41b2b6919f154cfa914aae63117
2017-08-25 14:48:09 -07:00

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/*
* Copyright (C) 2017 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.
*/
#include <stdint.h>
#include <gtest/gtest.h>
#include <unwindstack/Elf.h>
#include <unwindstack/ElfInterface.h>
#include <unwindstack/MapInfo.h>
#include <unwindstack/Regs.h>
#include "MemoryFake.h"
namespace unwindstack {
class ElfFake : public Elf {
public:
ElfFake(Memory* memory) : Elf(memory) { valid_ = true; }
virtual ~ElfFake() = default;
void set_elf_interface(ElfInterface* interface) { interface_.reset(interface); }
};
class ElfInterfaceFake : public ElfInterface {
public:
ElfInterfaceFake(Memory* memory) : ElfInterface(memory) {}
virtual ~ElfInterfaceFake() = default;
void set_load_bias(uint64_t load_bias) { load_bias_ = load_bias; }
bool Init() override { return false; }
void InitHeaders() override {}
bool GetSoname(std::string*) override { return false; }
bool GetFunctionName(uint64_t, std::string*, uint64_t*) override { return false; }
bool Step(uint64_t, Regs*, Memory*) override { return false; }
};
template <typename TypeParam>
class RegsTestImpl : public RegsImpl<TypeParam> {
public:
RegsTestImpl(uint16_t total_regs, uint16_t regs_sp)
: RegsImpl<TypeParam>(total_regs, regs_sp, Regs::Location(Regs::LOCATION_UNKNOWN, 0)) {}
RegsTestImpl(uint16_t total_regs, uint16_t regs_sp, Regs::Location return_loc)
: RegsImpl<TypeParam>(total_regs, regs_sp, return_loc) {}
virtual ~RegsTestImpl() = default;
uint32_t MachineType() override { return 0; }
uint64_t GetAdjustedPc(uint64_t, Elf*) override { return 0; }
void SetFromRaw() override {}
bool StepIfSignalHandler(uint64_t, Elf*, Memory*) override { return false; }
};
class RegsTest : public ::testing::Test {
protected:
void SetUp() override {
memory_ = new MemoryFake;
elf_.reset(new ElfFake(memory_));
elf_interface_ = new ElfInterfaceFake(elf_->memory());
elf_->set_elf_interface(elf_interface_);
}
template <typename AddressType>
void RegsReturnAddressRegister();
ElfInterfaceFake* elf_interface_;
MemoryFake* memory_;
std::unique_ptr<ElfFake> elf_;
};
TEST_F(RegsTest, regs32) {
RegsTestImpl<uint32_t> regs32(50, 10);
ASSERT_EQ(50U, regs32.total_regs());
ASSERT_EQ(10U, regs32.sp_reg());
uint32_t* raw = reinterpret_cast<uint32_t*>(regs32.RawData());
for (size_t i = 0; i < 50; i++) {
raw[i] = 0xf0000000 + i;
}
regs32.set_pc(0xf0120340);
regs32.set_sp(0xa0ab0cd0);
for (size_t i = 0; i < 50; i++) {
ASSERT_EQ(0xf0000000U + i, regs32[i]) << "Failed comparing register " << i;
}
ASSERT_EQ(0xf0120340U, regs32.pc());
ASSERT_EQ(0xa0ab0cd0U, regs32.sp());
regs32[32] = 10;
ASSERT_EQ(10U, regs32[32]);
}
TEST_F(RegsTest, regs64) {
RegsTestImpl<uint64_t> regs64(30, 12);
ASSERT_EQ(30U, regs64.total_regs());
ASSERT_EQ(12U, regs64.sp_reg());
uint64_t* raw = reinterpret_cast<uint64_t*>(regs64.RawData());
for (size_t i = 0; i < 30; i++) {
raw[i] = 0xf123456780000000UL + i;
}
regs64.set_pc(0xf123456780102030UL);
regs64.set_sp(0xa123456780a0b0c0UL);
for (size_t i = 0; i < 30; i++) {
ASSERT_EQ(0xf123456780000000U + i, regs64[i]) << "Failed reading register " << i;
}
ASSERT_EQ(0xf123456780102030UL, regs64.pc());
ASSERT_EQ(0xa123456780a0b0c0UL, regs64.sp());
regs64[8] = 10;
ASSERT_EQ(10U, regs64[8]);
}
template <typename AddressType>
void RegsTest::RegsReturnAddressRegister() {
RegsTestImpl<AddressType> regs(20, 10, Regs::Location(Regs::LOCATION_REGISTER, 5));
regs[5] = 0x12345;
uint64_t value;
ASSERT_TRUE(regs.GetReturnAddressFromDefault(memory_, &value));
ASSERT_EQ(0x12345U, value);
}
TEST_F(RegsTest, regs32_return_address_register) {
RegsReturnAddressRegister<uint32_t>();
}
TEST_F(RegsTest, regs64_return_address_register) {
RegsReturnAddressRegister<uint64_t>();
}
TEST_F(RegsTest, regs32_return_address_sp_offset) {
RegsTestImpl<uint32_t> regs(20, 10, Regs::Location(Regs::LOCATION_SP_OFFSET, -2));
regs.set_sp(0x2002);
memory_->SetData32(0x2000, 0x12345678);
uint64_t value;
ASSERT_TRUE(regs.GetReturnAddressFromDefault(memory_, &value));
ASSERT_EQ(0x12345678U, value);
}
TEST_F(RegsTest, regs64_return_address_sp_offset) {
RegsTestImpl<uint64_t> regs(20, 10, Regs::Location(Regs::LOCATION_SP_OFFSET, -8));
regs.set_sp(0x2008);
memory_->SetData64(0x2000, 0x12345678aabbccddULL);
uint64_t value;
ASSERT_TRUE(regs.GetReturnAddressFromDefault(memory_, &value));
ASSERT_EQ(0x12345678aabbccddULL, value);
}
TEST_F(RegsTest, rel_pc) {
RegsArm64 arm64;
ASSERT_EQ(0xcU, arm64.GetAdjustedPc(0x10, elf_.get()));
ASSERT_EQ(0x0U, arm64.GetAdjustedPc(0x4, elf_.get()));
ASSERT_EQ(0x3U, arm64.GetAdjustedPc(0x3, elf_.get()));
ASSERT_EQ(0x2U, arm64.GetAdjustedPc(0x2, elf_.get()));
ASSERT_EQ(0x1U, arm64.GetAdjustedPc(0x1, elf_.get()));
ASSERT_EQ(0x0U, arm64.GetAdjustedPc(0x0, elf_.get()));
RegsX86 x86;
ASSERT_EQ(0xffU, x86.GetAdjustedPc(0x100, elf_.get()));
ASSERT_EQ(0x1U, x86.GetAdjustedPc(0x2, elf_.get()));
ASSERT_EQ(0x0U, x86.GetAdjustedPc(0x1, elf_.get()));
ASSERT_EQ(0x0U, x86.GetAdjustedPc(0x0, elf_.get()));
RegsX86_64 x86_64;
ASSERT_EQ(0xffU, x86_64.GetAdjustedPc(0x100, elf_.get()));
ASSERT_EQ(0x1U, x86_64.GetAdjustedPc(0x2, elf_.get()));
ASSERT_EQ(0x0U, x86_64.GetAdjustedPc(0x1, elf_.get()));
ASSERT_EQ(0x0U, x86_64.GetAdjustedPc(0x0, elf_.get()));
}
TEST_F(RegsTest, rel_pc_arm) {
RegsArm arm;
// Check fence posts.
elf_interface_->set_load_bias(0);
ASSERT_EQ(3U, arm.GetAdjustedPc(0x5, elf_.get()));
ASSERT_EQ(4U, arm.GetAdjustedPc(0x4, elf_.get()));
ASSERT_EQ(3U, arm.GetAdjustedPc(0x3, elf_.get()));
ASSERT_EQ(2U, arm.GetAdjustedPc(0x2, elf_.get()));
ASSERT_EQ(1U, arm.GetAdjustedPc(0x1, elf_.get()));
ASSERT_EQ(0U, arm.GetAdjustedPc(0x0, elf_.get()));
elf_interface_->set_load_bias(0x100);
ASSERT_EQ(0xffU, arm.GetAdjustedPc(0xff, elf_.get()));
ASSERT_EQ(0x103U, arm.GetAdjustedPc(0x105, elf_.get()));
ASSERT_EQ(0x104U, arm.GetAdjustedPc(0x104, elf_.get()));
ASSERT_EQ(0x103U, arm.GetAdjustedPc(0x103, elf_.get()));
ASSERT_EQ(0x102U, arm.GetAdjustedPc(0x102, elf_.get()));
ASSERT_EQ(0x101U, arm.GetAdjustedPc(0x101, elf_.get()));
ASSERT_EQ(0x100U, arm.GetAdjustedPc(0x100, elf_.get()));
// Check thumb instructions handling.
elf_interface_->set_load_bias(0);
memory_->SetData32(0x2000, 0);
ASSERT_EQ(0x2003U, arm.GetAdjustedPc(0x2005, elf_.get()));
memory_->SetData32(0x2000, 0xe000f000);
ASSERT_EQ(0x2001U, arm.GetAdjustedPc(0x2005, elf_.get()));
elf_interface_->set_load_bias(0x400);
memory_->SetData32(0x2100, 0);
ASSERT_EQ(0x2503U, arm.GetAdjustedPc(0x2505, elf_.get()));
memory_->SetData32(0x2100, 0xf111f111);
ASSERT_EQ(0x2501U, arm.GetAdjustedPc(0x2505, elf_.get()));
}
TEST_F(RegsTest, elf_invalid) {
Elf invalid_elf(new MemoryFake);
RegsArm regs_arm;
RegsArm64 regs_arm64;
RegsX86 regs_x86;
RegsX86_64 regs_x86_64;
MapInfo map_info{.start = 0x1000, .end = 0x2000};
regs_arm.set_pc(0x1500);
ASSERT_EQ(0x500U, invalid_elf.GetRelPc(regs_arm.pc(), &map_info));
ASSERT_EQ(0x500U, regs_arm.GetAdjustedPc(0x500U, &invalid_elf));
regs_arm64.set_pc(0x1600);
ASSERT_EQ(0x600U, invalid_elf.GetRelPc(regs_arm64.pc(), &map_info));
ASSERT_EQ(0x600U, regs_arm64.GetAdjustedPc(0x600U, &invalid_elf));
regs_x86.set_pc(0x1700);
ASSERT_EQ(0x700U, invalid_elf.GetRelPc(regs_x86.pc(), &map_info));
ASSERT_EQ(0x700U, regs_x86.GetAdjustedPc(0x700U, &invalid_elf));
regs_x86_64.set_pc(0x1800);
ASSERT_EQ(0x800U, invalid_elf.GetRelPc(regs_x86_64.pc(), &map_info));
ASSERT_EQ(0x800U, regs_x86_64.GetAdjustedPc(0x800U, &invalid_elf));
}
TEST_F(RegsTest, arm_set_from_raw) {
RegsArm arm;
uint32_t* regs = reinterpret_cast<uint32_t*>(arm.RawData());
regs[13] = 0x100;
regs[15] = 0x200;
arm.SetFromRaw();
EXPECT_EQ(0x100U, arm.sp());
EXPECT_EQ(0x200U, arm.pc());
}
TEST_F(RegsTest, arm64_set_from_raw) {
RegsArm64 arm64;
uint64_t* regs = reinterpret_cast<uint64_t*>(arm64.RawData());
regs[31] = 0xb100000000ULL;
regs[32] = 0xc200000000ULL;
arm64.SetFromRaw();
EXPECT_EQ(0xb100000000U, arm64.sp());
EXPECT_EQ(0xc200000000U, arm64.pc());
}
TEST_F(RegsTest, x86_set_from_raw) {
RegsX86 x86;
uint32_t* regs = reinterpret_cast<uint32_t*>(x86.RawData());
regs[4] = 0x23450000;
regs[8] = 0xabcd0000;
x86.SetFromRaw();
EXPECT_EQ(0x23450000U, x86.sp());
EXPECT_EQ(0xabcd0000U, x86.pc());
}
TEST_F(RegsTest, x86_64_set_from_raw) {
RegsX86_64 x86_64;
uint64_t* regs = reinterpret_cast<uint64_t*>(x86_64.RawData());
regs[7] = 0x1200000000ULL;
regs[16] = 0x4900000000ULL;
x86_64.SetFromRaw();
EXPECT_EQ(0x1200000000U, x86_64.sp());
EXPECT_EQ(0x4900000000U, x86_64.pc());
}
} // namespace unwindstack
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