libunwindstack/tests/ElfTest.cpp - LeafOS-Project/android_system_core - Gitiles

 /*
  * 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.
  */

 #include <elf.h>
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>

 #include <gmock/gmock.h>
 #include <gtest/gtest.h>

 #include <unwindstack/Elf.h>
 #include <unwindstack/MapInfo.h>
 #include <unwindstack/RegsArm.h>

 #include "ElfFake.h"
 #include "ElfTestUtils.h"
 #include "LogFake.h"
 #include "MemoryFake.h"

 #if !defined(PT_ARM_EXIDX)
 #define PT_ARM_EXIDX 0x70000001
 #endif

 namespace unwindstack {

 class ElfTest : public ::testing::Test {
  protected:
   void SetUp() override {
     memory_ = new MemoryFake;
   }

   void InitElf32(uint32_t machine_type) {
     Elf32_Ehdr ehdr;
     TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, machine_type);

     ehdr.e_phoff = 0x100;
     ehdr.e_ehsize = sizeof(ehdr);
     ehdr.e_phentsize = sizeof(Elf32_Phdr);
     ehdr.e_phnum = 1;
     ehdr.e_shentsize = sizeof(Elf32_Shdr);
     if (machine_type == EM_ARM) {
       ehdr.e_flags = 0x5000200;
       ehdr.e_phnum = 2;
     }
     memory_->SetMemory(0, &ehdr, sizeof(ehdr));

     Elf32_Phdr phdr;
     memset(&phdr, 0, sizeof(phdr));
     phdr.p_type = PT_LOAD;
     phdr.p_filesz = 0x10000;
     phdr.p_memsz = 0x10000;
     phdr.p_flags = PF_R | PF_X;
     phdr.p_align = 0x1000;
     memory_->SetMemory(0x100, &phdr, sizeof(phdr));

     if (machine_type == EM_ARM) {
       memset(&phdr, 0, sizeof(phdr));
       phdr.p_type = PT_ARM_EXIDX;
       phdr.p_offset = 0x30000;
       phdr.p_vaddr = 0x30000;
       phdr.p_paddr = 0x30000;
       phdr.p_filesz = 16;
       phdr.p_memsz = 16;
       phdr.p_flags = PF_R;
       phdr.p_align = 0x4;
       memory_->SetMemory(0x100 + sizeof(phdr), &phdr, sizeof(phdr));
     }
   }

   void InitElf64(uint32_t machine_type) {
     Elf64_Ehdr ehdr;
     TestInitEhdr<Elf64_Ehdr>(&ehdr, ELFCLASS64, machine_type);

     ehdr.e_phoff = 0x100;
     ehdr.e_flags = 0x5000200;
     ehdr.e_ehsize = sizeof(ehdr);
     ehdr.e_phentsize = sizeof(Elf64_Phdr);
     ehdr.e_phnum = 1;
     ehdr.e_shentsize = sizeof(Elf64_Shdr);
     memory_->SetMemory(0, &ehdr, sizeof(ehdr));

     Elf64_Phdr phdr;
     memset(&phdr, 0, sizeof(phdr));
     phdr.p_type = PT_LOAD;
     phdr.p_filesz = 0x10000;
     phdr.p_memsz = 0x10000;
     phdr.p_flags = PF_R | PF_X;
     phdr.p_align = 0x1000;
     memory_->SetMemory(0x100, &phdr, sizeof(phdr));
   }

   MemoryFake* memory_;
 };

 TEST_F(ElfTest, invalid_memory) {
   Elf elf(memory_);

   ASSERT_FALSE(elf.Init());
   ASSERT_FALSE(elf.valid());
 }

 TEST_F(ElfTest, elf_invalid) {
   Elf elf(memory_);

   InitElf32(EM_386);

   // Corrupt the ELF signature.
   memory_->SetData32(0, 0x7f000000);

   ASSERT_FALSE(elf.Init());
   ASSERT_FALSE(elf.valid());
   ASSERT_TRUE(elf.interface() == nullptr);

   ASSERT_EQ("", elf.GetSoname());

   std::string name;
   uint64_t func_offset;
   ASSERT_FALSE(elf.GetFunctionName(0, &name, &func_offset));

   ASSERT_FALSE(elf.StepIfSignalHandler(0, nullptr, nullptr));
   EXPECT_EQ(ERROR_INVALID_ELF, elf.GetLastErrorCode());

   bool finished;
   ASSERT_FALSE(elf.Step(0, nullptr, nullptr, &finished));
   EXPECT_EQ(ERROR_INVALID_ELF, elf.GetLastErrorCode());
 }

 TEST_F(ElfTest, elf32_invalid_machine) {
   Elf elf(memory_);

   InitElf32(EM_PPC);

   ResetLogs();
   ASSERT_FALSE(elf.Init());

   ASSERT_EQ("", GetFakeLogBuf());
   ASSERT_EQ("4 unwind 32 bit elf that is neither arm nor x86 nor mips: e_machine = 20\n\n",
             GetFakeLogPrint());
 }

 TEST_F(ElfTest, elf64_invalid_machine) {
   Elf elf(memory_);

   InitElf64(EM_PPC64);

   ResetLogs();
   ASSERT_FALSE(elf.Init());

   ASSERT_EQ("", GetFakeLogBuf());
   ASSERT_EQ("4 unwind 64 bit elf that is neither aarch64 nor x86_64 nor mips64: e_machine = 21\n\n",
             GetFakeLogPrint());
 }

 TEST_F(ElfTest, elf_arm) {
   Elf elf(memory_);

   InitElf32(EM_ARM);

   ASSERT_TRUE(elf.Init());
   ASSERT_TRUE(elf.valid());
   ASSERT_EQ(static_cast<uint32_t>(EM_ARM), elf.machine_type());
   ASSERT_EQ(ELFCLASS32, elf.class_type());
   ASSERT_TRUE(elf.interface() != nullptr);
 }

 TEST_F(ElfTest, elf_mips) {
   Elf elf(memory_);

   InitElf32(EM_MIPS);

   ASSERT_TRUE(elf.Init());
   ASSERT_TRUE(elf.valid());
   ASSERT_EQ(static_cast<uint32_t>(EM_MIPS), elf.machine_type());
   ASSERT_EQ(ELFCLASS32, elf.class_type());
   ASSERT_TRUE(elf.interface() != nullptr);
 }

 TEST_F(ElfTest, elf_x86) {
   Elf elf(memory_);

   InitElf32(EM_386);

   ASSERT_TRUE(elf.Init());
   ASSERT_TRUE(elf.valid());
   ASSERT_EQ(static_cast<uint32_t>(EM_386), elf.machine_type());
   ASSERT_EQ(ELFCLASS32, elf.class_type());
   ASSERT_TRUE(elf.interface() != nullptr);
 }

 TEST_F(ElfTest, elf_arm64) {
   Elf elf(memory_);

   InitElf64(EM_AARCH64);

   ASSERT_TRUE(elf.Init());
   ASSERT_TRUE(elf.valid());
   ASSERT_EQ(static_cast<uint32_t>(EM_AARCH64), elf.machine_type());
   ASSERT_EQ(ELFCLASS64, elf.class_type());
   ASSERT_TRUE(elf.interface() != nullptr);
 }

 TEST_F(ElfTest, elf_x86_64) {
   Elf elf(memory_);

   InitElf64(EM_X86_64);

   ASSERT_TRUE(elf.Init());
   ASSERT_TRUE(elf.valid());
   ASSERT_EQ(static_cast<uint32_t>(EM_X86_64), elf.machine_type());
   ASSERT_EQ(ELFCLASS64, elf.class_type());
   ASSERT_TRUE(elf.interface() != nullptr);
 }

 TEST_F(ElfTest, elf_mips64) {
   Elf elf(memory_);

   InitElf64(EM_MIPS);

   ASSERT_TRUE(elf.Init());
   ASSERT_TRUE(elf.valid());
   ASSERT_EQ(static_cast<uint32_t>(EM_MIPS), elf.machine_type());
   ASSERT_EQ(ELFCLASS64, elf.class_type());
   ASSERT_TRUE(elf.interface() != nullptr);
 }

 TEST_F(ElfTest, gnu_debugdata_init32) {
   TestInitGnuDebugdata<Elf32_Ehdr, Elf32_Shdr>(ELFCLASS32, EM_ARM, true,
                                                [&](uint64_t offset, const void* ptr, size_t size) {
                                                  memory_->SetMemory(offset, ptr, size);
                                                });

   Elf elf(memory_);
   ASSERT_TRUE(elf.Init());
   ASSERT_TRUE(elf.interface() != nullptr);
   ASSERT_TRUE(elf.gnu_debugdata_interface() != nullptr);
   EXPECT_EQ(0x1acU, elf.interface()->gnu_debugdata_offset());
   EXPECT_EQ(0x8cU, elf.interface()->gnu_debugdata_size());
 }

 TEST_F(ElfTest, gnu_debugdata_init64) {
   TestInitGnuDebugdata<Elf64_Ehdr, Elf64_Shdr>(ELFCLASS64, EM_AARCH64, true,
                                                [&](uint64_t offset, const void* ptr, size_t size) {
                                                  memory_->SetMemory(offset, ptr, size);
                                                });

   Elf elf(memory_);
   ASSERT_TRUE(elf.Init());
   ASSERT_TRUE(elf.interface() != nullptr);
   ASSERT_TRUE(elf.gnu_debugdata_interface() != nullptr);
   EXPECT_EQ(0x200U, elf.interface()->gnu_debugdata_offset());
   EXPECT_EQ(0x90U, elf.interface()->gnu_debugdata_size());
 }

 TEST_F(ElfTest, rel_pc) {
   ElfFake elf(memory_);

   ElfInterfaceFake* interface = new ElfInterfaceFake(memory_);
   elf.FakeSetInterface(interface);

   elf.FakeSetValid(true);
   MapInfo map_info(nullptr, 0x1000, 0x2000, 0, 0, "");

   ASSERT_EQ(0x101U, elf.GetRelPc(0x1101, &map_info));

   elf.FakeSetValid(false);
   ASSERT_EQ(0x101U, elf.GetRelPc(0x1101, &map_info));
 }

 TEST_F(ElfTest, step_in_signal_map) {
   ElfFake elf(memory_);

   RegsArm regs;
   regs[13] = 0x50000;
   regs[15] = 0x8000;

   ElfInterfaceFake* interface = new ElfInterfaceFake(memory_);
   elf.FakeSetInterface(interface);

   memory_->SetData32(0x3000, 0xdf0027ad);
   MemoryFake process_memory;
   process_memory.SetData32(0x50000, 0);
   for (size_t i = 0; i < 16; i++) {
     process_memory.SetData32(0x500a0 + i * sizeof(uint32_t), i);
   }

   elf.FakeSetValid(true);
   ASSERT_TRUE(elf.StepIfSignalHandler(0x3000, &regs, &process_memory));
   EXPECT_EQ(ERROR_NONE, elf.GetLastErrorCode());
   EXPECT_EQ(15U, regs.pc());
   EXPECT_EQ(13U, regs.sp());
 }

 class ElfInterfaceMock : public ElfInterface {
  public:
   ElfInterfaceMock(Memory* memory) : ElfInterface(memory) {}
   virtual ~ElfInterfaceMock() = default;

   bool Init(uint64_t*) override { return false; }
   void InitHeaders(uint64_t) override {}
   std::string GetSoname() override { return ""; }
   bool GetFunctionName(uint64_t, std::string*, uint64_t*) override { return false; }
   std::string GetBuildID() override { return ""; }

   MOCK_METHOD4(Step, bool(uint64_t, Regs*, Memory*, bool*));
   MOCK_METHOD2(GetGlobalVariable, bool(const std::string&, uint64_t*));
   MOCK_METHOD1(IsValidPc, bool(uint64_t));

   void MockSetDynamicOffset(uint64_t offset) { dynamic_offset_ = offset; }
   void MockSetDynamicVaddr(uint64_t vaddr) { dynamic_vaddr_ = vaddr; }
   void MockSetDynamicSize(uint64_t size) { dynamic_size_ = size; }
 };

 TEST_F(ElfTest, step_in_interface) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);

   RegsArm regs;

   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
   MemoryFake process_memory;

   bool finished;
   EXPECT_CALL(*interface, Step(0x1000, &regs, &process_memory, &finished))
       .WillOnce(::testing::Return(true));

   ASSERT_TRUE(elf.Step(0x1000, &regs, &process_memory, &finished));
 }

 TEST_F(ElfTest, get_global_invalid_elf) {
   ElfFake elf(memory_);
   elf.FakeSetValid(false);

   std::string global("something");
   uint64_t offset;
   ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
 }

 TEST_F(ElfTest, get_global_valid_not_in_interface) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);

   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);

   uint64_t offset;
   std::string global("something");
   EXPECT_CALL(*interface, GetGlobalVariable(global, &offset)).WillOnce(::testing::Return(false));

   ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
 }

 TEST_F(ElfTest, get_global_valid_below_load_bias) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
   elf.FakeSetLoadBias(0x1000);

   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);

   uint64_t offset;
   std::string global("something");
   EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
       .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));

   ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
 }

 TEST_F(ElfTest, get_global_valid_dynamic_zero_non_zero_load_bias) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
   elf.FakeSetLoadBias(0x100);

   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);

   uint64_t offset;
   std::string global("something");
   EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
       .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));

   ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
   EXPECT_EQ(0x200U, offset);
 }

 TEST_F(ElfTest, get_global_valid_dynamic_zero) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);

   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);

   ElfInterfaceMock* gnu_interface = new ElfInterfaceMock(memory_);
   elf.FakeSetGnuDebugdataInterface(gnu_interface);

   uint64_t offset;
   std::string global("something");
   EXPECT_CALL(*interface, GetGlobalVariable(global, &offset)).WillOnce(::testing::Return(false));

   EXPECT_CALL(*gnu_interface, GetGlobalVariable(global, &offset))
       .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x500), ::testing::Return(true)));

   ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
   EXPECT_EQ(0x500U, offset);
 }

 TEST_F(ElfTest, get_global_valid_in_gnu_debugdata_dynamic_zero) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);

   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);

   uint64_t offset;
   std::string global("something");
   EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
       .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));

   ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
   EXPECT_EQ(0x300U, offset);
 }

 TEST_F(ElfTest, get_global_valid_dynamic_adjust_negative) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);

   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   interface->MockSetDynamicOffset(0x400);
   interface->MockSetDynamicVaddr(0x800);
   interface->MockSetDynamicSize(0x100);
   elf.FakeSetInterface(interface);

   uint64_t offset;
   std::string global("something");
   EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
       .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x850), ::testing::Return(true)));

   ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
   EXPECT_EQ(0x450U, offset);
 }

 TEST_F(ElfTest, get_global_valid_dynamic_adjust_positive) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);

   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   interface->MockSetDynamicOffset(0x1000);
   interface->MockSetDynamicVaddr(0x800);
   interface->MockSetDynamicSize(0x100);
   elf.FakeSetInterface(interface);

   uint64_t offset;
   std::string global("something");
   EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
       .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x850), ::testing::Return(true)));

   ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
   EXPECT_EQ(0x1050U, offset);
 }

 TEST_F(ElfTest, is_valid_pc_elf_invalid) {
   ElfFake elf(memory_);
   elf.FakeSetValid(false);

   EXPECT_FALSE(elf.IsValidPc(0x100));
   EXPECT_FALSE(elf.IsValidPc(0x200));
 }

 TEST_F(ElfTest, is_valid_pc_interface) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);

   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);

   EXPECT_CALL(*interface, IsValidPc(0x1500)).WillOnce(::testing::Return(true));

   EXPECT_TRUE(elf.IsValidPc(0x1500));
 }

 TEST_F(ElfTest, is_valid_pc_from_gnu_debugdata) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);

   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
   ElfInterfaceMock* gnu_interface = new ElfInterfaceMock(memory_);
   elf.FakeSetGnuDebugdataInterface(gnu_interface);

   EXPECT_CALL(*interface, IsValidPc(0x1500)).WillOnce(::testing::Return(false));
   EXPECT_CALL(*gnu_interface, IsValidPc(0x1500)).WillOnce(::testing::Return(true));

   EXPECT_TRUE(elf.IsValidPc(0x1500));
 }

 TEST_F(ElfTest, error_code_not_valid) {
   ElfFake elf(memory_);
   elf.FakeSetValid(false);

   ErrorData error{ERROR_MEMORY_INVALID, 0x100};
   elf.GetLastError(&error);
   EXPECT_EQ(ERROR_MEMORY_INVALID, error.code);
   EXPECT_EQ(0x100U, error.address);
 }

 TEST_F(ElfTest, error_code_valid) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
   ElfInterfaceFake* interface = new ElfInterfaceFake(memory_);
   elf.FakeSetInterface(interface);
   interface->FakeSetErrorCode(ERROR_MEMORY_INVALID);
   interface->FakeSetErrorAddress(0x1000);

   ErrorData error{ERROR_NONE, 0};
   elf.GetLastError(&error);
   EXPECT_EQ(ERROR_MEMORY_INVALID, error.code);
   EXPECT_EQ(0x1000U, error.address);
   EXPECT_EQ(ERROR_MEMORY_INVALID, elf.GetLastErrorCode());
   EXPECT_EQ(0x1000U, elf.GetLastErrorAddress());
 }

 }  // namespace unwindstack
	/*
	* 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.
	*/

	#include <elf.h>
	#include <fcntl.h>
	#include <sys/stat.h>
	#include <sys/types.h>
	#include <unistd.h>

	#include <gmock/gmock.h>
	#include <gtest/gtest.h>

	#include <unwindstack/Elf.h>
	#include <unwindstack/MapInfo.h>
	#include <unwindstack/RegsArm.h>

	#include "ElfFake.h"
	#include "ElfTestUtils.h"
	#include "LogFake.h"
	#include "MemoryFake.h"

	#if !defined(PT_ARM_EXIDX)
	#define PT_ARM_EXIDX 0x70000001
	#endif

	namespace unwindstack {

	class ElfTest : public ::testing::Test {
	protected:
	void SetUp() override {
	memory_ = new MemoryFake;
	}

	void InitElf32(uint32_t machine_type) {
	Elf32_Ehdr ehdr;
	TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, machine_type);

	ehdr.e_phoff = 0x100;
	ehdr.e_ehsize = sizeof(ehdr);
	ehdr.e_phentsize = sizeof(Elf32_Phdr);
	ehdr.e_phnum = 1;
	ehdr.e_shentsize = sizeof(Elf32_Shdr);
	if (machine_type == EM_ARM) {
	ehdr.e_flags = 0x5000200;
	ehdr.e_phnum = 2;
	}
	memory_->SetMemory(0, &ehdr, sizeof(ehdr));

	Elf32_Phdr phdr;
	memset(&phdr, 0, sizeof(phdr));
	phdr.p_type = PT_LOAD;
	phdr.p_filesz = 0x10000;
	phdr.p_memsz = 0x10000;
	phdr.p_flags = PF_R \| PF_X;
	phdr.p_align = 0x1000;
	memory_->SetMemory(0x100, &phdr, sizeof(phdr));

	if (machine_type == EM_ARM) {
	memset(&phdr, 0, sizeof(phdr));
	phdr.p_type = PT_ARM_EXIDX;
	phdr.p_offset = 0x30000;
	phdr.p_vaddr = 0x30000;
	phdr.p_paddr = 0x30000;
	phdr.p_filesz = 16;
	phdr.p_memsz = 16;
	phdr.p_flags = PF_R;
	phdr.p_align = 0x4;
	memory_->SetMemory(0x100 + sizeof(phdr), &phdr, sizeof(phdr));
	}
	}

	void InitElf64(uint32_t machine_type) {
	Elf64_Ehdr ehdr;
	TestInitEhdr<Elf64_Ehdr>(&ehdr, ELFCLASS64, machine_type);

	ehdr.e_phoff = 0x100;
	ehdr.e_flags = 0x5000200;
	ehdr.e_ehsize = sizeof(ehdr);
	ehdr.e_phentsize = sizeof(Elf64_Phdr);
	ehdr.e_phnum = 1;
	ehdr.e_shentsize = sizeof(Elf64_Shdr);
	memory_->SetMemory(0, &ehdr, sizeof(ehdr));

	Elf64_Phdr phdr;
	memset(&phdr, 0, sizeof(phdr));
	phdr.p_type = PT_LOAD;
	phdr.p_filesz = 0x10000;
	phdr.p_memsz = 0x10000;
	phdr.p_flags = PF_R \| PF_X;
	phdr.p_align = 0x1000;
	memory_->SetMemory(0x100, &phdr, sizeof(phdr));
	}

	MemoryFake* memory_;
	};

	TEST_F(ElfTest, invalid_memory) {
	Elf elf(memory_);

	ASSERT_FALSE(elf.Init());
	ASSERT_FALSE(elf.valid());
	}

	TEST_F(ElfTest, elf_invalid) {
	Elf elf(memory_);

	InitElf32(EM_386);

	// Corrupt the ELF signature.
	memory_->SetData32(0, 0x7f000000);

	ASSERT_FALSE(elf.Init());
	ASSERT_FALSE(elf.valid());
	ASSERT_TRUE(elf.interface() == nullptr);

	ASSERT_EQ("", elf.GetSoname());

	std::string name;
	uint64_t func_offset;
	ASSERT_FALSE(elf.GetFunctionName(0, &name, &func_offset));

	ASSERT_FALSE(elf.StepIfSignalHandler(0, nullptr, nullptr));
	EXPECT_EQ(ERROR_INVALID_ELF, elf.GetLastErrorCode());

	bool finished;
	ASSERT_FALSE(elf.Step(0, nullptr, nullptr, &finished));
	EXPECT_EQ(ERROR_INVALID_ELF, elf.GetLastErrorCode());
	}

	TEST_F(ElfTest, elf32_invalid_machine) {
	Elf elf(memory_);

	InitElf32(EM_PPC);

	ResetLogs();
	ASSERT_FALSE(elf.Init());

	ASSERT_EQ("", GetFakeLogBuf());
	ASSERT_EQ("4 unwind 32 bit elf that is neither arm nor x86 nor mips: e_machine = 20\n\n",
	GetFakeLogPrint());
	}

	TEST_F(ElfTest, elf64_invalid_machine) {
	Elf elf(memory_);

	InitElf64(EM_PPC64);

	ResetLogs();
	ASSERT_FALSE(elf.Init());

	ASSERT_EQ("", GetFakeLogBuf());
	ASSERT_EQ("4 unwind 64 bit elf that is neither aarch64 nor x86_64 nor mips64: e_machine = 21\n\n",
	GetFakeLogPrint());
	}

	TEST_F(ElfTest, elf_arm) {
	Elf elf(memory_);

	InitElf32(EM_ARM);

	ASSERT_TRUE(elf.Init());
	ASSERT_TRUE(elf.valid());
	ASSERT_EQ(static_cast<uint32_t>(EM_ARM), elf.machine_type());
	ASSERT_EQ(ELFCLASS32, elf.class_type());
	ASSERT_TRUE(elf.interface() != nullptr);
	}

	TEST_F(ElfTest, elf_mips) {
	Elf elf(memory_);

	InitElf32(EM_MIPS);

	ASSERT_TRUE(elf.Init());
	ASSERT_TRUE(elf.valid());
	ASSERT_EQ(static_cast<uint32_t>(EM_MIPS), elf.machine_type());
	ASSERT_EQ(ELFCLASS32, elf.class_type());
	ASSERT_TRUE(elf.interface() != nullptr);
	}

	TEST_F(ElfTest, elf_x86) {
	Elf elf(memory_);

	InitElf32(EM_386);

	ASSERT_TRUE(elf.Init());
	ASSERT_TRUE(elf.valid());
	ASSERT_EQ(static_cast<uint32_t>(EM_386), elf.machine_type());
	ASSERT_EQ(ELFCLASS32, elf.class_type());
	ASSERT_TRUE(elf.interface() != nullptr);
	}

	TEST_F(ElfTest, elf_arm64) {
	Elf elf(memory_);

	InitElf64(EM_AARCH64);

	ASSERT_TRUE(elf.Init());
	ASSERT_TRUE(elf.valid());
	ASSERT_EQ(static_cast<uint32_t>(EM_AARCH64), elf.machine_type());
	ASSERT_EQ(ELFCLASS64, elf.class_type());
	ASSERT_TRUE(elf.interface() != nullptr);
	}

	TEST_F(ElfTest, elf_x86_64) {
	Elf elf(memory_);

	InitElf64(EM_X86_64);

	ASSERT_TRUE(elf.Init());
	ASSERT_TRUE(elf.valid());
	ASSERT_EQ(static_cast<uint32_t>(EM_X86_64), elf.machine_type());
	ASSERT_EQ(ELFCLASS64, elf.class_type());
	ASSERT_TRUE(elf.interface() != nullptr);
	}

	TEST_F(ElfTest, elf_mips64) {
	Elf elf(memory_);

	InitElf64(EM_MIPS);

	ASSERT_TRUE(elf.Init());
	ASSERT_TRUE(elf.valid());
	ASSERT_EQ(static_cast<uint32_t>(EM_MIPS), elf.machine_type());
	ASSERT_EQ(ELFCLASS64, elf.class_type());
	ASSERT_TRUE(elf.interface() != nullptr);
	}

	TEST_F(ElfTest, gnu_debugdata_init32) {
	TestInitGnuDebugdata<Elf32_Ehdr, Elf32_Shdr>(ELFCLASS32, EM_ARM, true,
	[&](uint64_t offset, const void* ptr, size_t size) {
	memory_->SetMemory(offset, ptr, size);
	});

	Elf elf(memory_);
	ASSERT_TRUE(elf.Init());
	ASSERT_TRUE(elf.interface() != nullptr);
	ASSERT_TRUE(elf.gnu_debugdata_interface() != nullptr);
	EXPECT_EQ(0x1acU, elf.interface()->gnu_debugdata_offset());
	EXPECT_EQ(0x8cU, elf.interface()->gnu_debugdata_size());
	}

	TEST_F(ElfTest, gnu_debugdata_init64) {
	TestInitGnuDebugdata<Elf64_Ehdr, Elf64_Shdr>(ELFCLASS64, EM_AARCH64, true,
	[&](uint64_t offset, const void* ptr, size_t size) {
	memory_->SetMemory(offset, ptr, size);
	});

	Elf elf(memory_);
	ASSERT_TRUE(elf.Init());
	ASSERT_TRUE(elf.interface() != nullptr);
	ASSERT_TRUE(elf.gnu_debugdata_interface() != nullptr);
	EXPECT_EQ(0x200U, elf.interface()->gnu_debugdata_offset());
	EXPECT_EQ(0x90U, elf.interface()->gnu_debugdata_size());
	}

	TEST_F(ElfTest, rel_pc) {
	ElfFake elf(memory_);

	ElfInterfaceFake* interface = new ElfInterfaceFake(memory_);
	elf.FakeSetInterface(interface);

	elf.FakeSetValid(true);
	MapInfo map_info(nullptr, 0x1000, 0x2000, 0, 0, "");

	ASSERT_EQ(0x101U, elf.GetRelPc(0x1101, &map_info));

	elf.FakeSetValid(false);
	ASSERT_EQ(0x101U, elf.GetRelPc(0x1101, &map_info));
	}

	TEST_F(ElfTest, step_in_signal_map) {
	ElfFake elf(memory_);

	RegsArm regs;
	regs[13] = 0x50000;
	regs[15] = 0x8000;

	ElfInterfaceFake* interface = new ElfInterfaceFake(memory_);
	elf.FakeSetInterface(interface);

	memory_->SetData32(0x3000, 0xdf0027ad);
	MemoryFake process_memory;
	process_memory.SetData32(0x50000, 0);
	for (size_t i = 0; i < 16; i++) {
	process_memory.SetData32(0x500a0 + i * sizeof(uint32_t), i);
	}

	elf.FakeSetValid(true);
	ASSERT_TRUE(elf.StepIfSignalHandler(0x3000, &regs, &process_memory));
	EXPECT_EQ(ERROR_NONE, elf.GetLastErrorCode());
	EXPECT_EQ(15U, regs.pc());
	EXPECT_EQ(13U, regs.sp());
	}

	class ElfInterfaceMock : public ElfInterface {
	public:
	ElfInterfaceMock(Memory* memory) : ElfInterface(memory) {}
	virtual ~ElfInterfaceMock() = default;

	bool Init(uint64_t*) override { return false; }
	void InitHeaders(uint64_t) override {}
	std::string GetSoname() override { return ""; }
	bool GetFunctionName(uint64_t, std::string, uint64_t) override { return false; }
	std::string GetBuildID() override { return ""; }

	MOCK_METHOD4(Step, bool(uint64_t, Regs, Memory, bool*));
	MOCK_METHOD2(GetGlobalVariable, bool(const std::string&, uint64_t*));
	MOCK_METHOD1(IsValidPc, bool(uint64_t));

	void MockSetDynamicOffset(uint64_t offset) { dynamic_offset_ = offset; }
	void MockSetDynamicVaddr(uint64_t vaddr) { dynamic_vaddr_ = vaddr; }
	void MockSetDynamicSize(uint64_t size) { dynamic_size_ = size; }
	};

	TEST_F(ElfTest, step_in_interface) {
	ElfFake elf(memory_);
	elf.FakeSetValid(true);

	RegsArm regs;

	ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
	elf.FakeSetInterface(interface);
	MemoryFake process_memory;

	bool finished;
	EXPECT_CALL(*interface, Step(0x1000, &regs, &process_memory, &finished))
	.WillOnce(::testing::Return(true));

	ASSERT_TRUE(elf.Step(0x1000, &regs, &process_memory, &finished));
	}

	TEST_F(ElfTest, get_global_invalid_elf) {
	ElfFake elf(memory_);
	elf.FakeSetValid(false);

	std::string global("something");
	uint64_t offset;
	ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
	}

	TEST_F(ElfTest, get_global_valid_not_in_interface) {
	ElfFake elf(memory_);
	elf.FakeSetValid(true);

	ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
	elf.FakeSetInterface(interface);

	uint64_t offset;
	std::string global("something");
	EXPECT_CALL(*interface, GetGlobalVariable(global, &offset)).WillOnce(::testing::Return(false));

	ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
	}

	TEST_F(ElfTest, get_global_valid_below_load_bias) {
	ElfFake elf(memory_);
	elf.FakeSetValid(true);
	elf.FakeSetLoadBias(0x1000);

	ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
	elf.FakeSetInterface(interface);

	uint64_t offset;
	std::string global("something");
	EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
	.WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));

	ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
	}

	TEST_F(ElfTest, get_global_valid_dynamic_zero_non_zero_load_bias) {
	ElfFake elf(memory_);
	elf.FakeSetValid(true);
	elf.FakeSetLoadBias(0x100);

	ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
	elf.FakeSetInterface(interface);

	uint64_t offset;
	std::string global("something");
	EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
	.WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));

	ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
	EXPECT_EQ(0x200U, offset);
	}

	TEST_F(ElfTest, get_global_valid_dynamic_zero) {
	ElfFake elf(memory_);
	elf.FakeSetValid(true);

	ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
	elf.FakeSetInterface(interface);

	ElfInterfaceMock* gnu_interface = new ElfInterfaceMock(memory_);
	elf.FakeSetGnuDebugdataInterface(gnu_interface);

	uint64_t offset;
	std::string global("something");
	EXPECT_CALL(*interface, GetGlobalVariable(global, &offset)).WillOnce(::testing::Return(false));

	EXPECT_CALL(*gnu_interface, GetGlobalVariable(global, &offset))
	.WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x500), ::testing::Return(true)));

	ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
	EXPECT_EQ(0x500U, offset);
	}

	TEST_F(ElfTest, get_global_valid_in_gnu_debugdata_dynamic_zero) {
	ElfFake elf(memory_);
	elf.FakeSetValid(true);

	ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
	elf.FakeSetInterface(interface);

	uint64_t offset;
	std::string global("something");
	EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
	.WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));

	ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
	EXPECT_EQ(0x300U, offset);
	}

	TEST_F(ElfTest, get_global_valid_dynamic_adjust_negative) {
	ElfFake elf(memory_);
	elf.FakeSetValid(true);

	ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
	interface->MockSetDynamicOffset(0x400);
	interface->MockSetDynamicVaddr(0x800);
	interface->MockSetDynamicSize(0x100);
	elf.FakeSetInterface(interface);

	uint64_t offset;
	std::string global("something");
	EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
	.WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x850), ::testing::Return(true)));

	ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
	EXPECT_EQ(0x450U, offset);
	}

	TEST_F(ElfTest, get_global_valid_dynamic_adjust_positive) {
	ElfFake elf(memory_);
	elf.FakeSetValid(true);

	ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
	interface->MockSetDynamicOffset(0x1000);
	interface->MockSetDynamicVaddr(0x800);
	interface->MockSetDynamicSize(0x100);
	elf.FakeSetInterface(interface);

	uint64_t offset;
	std::string global("something");
	EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
	.WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x850), ::testing::Return(true)));

	ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
	EXPECT_EQ(0x1050U, offset);
	}

	TEST_F(ElfTest, is_valid_pc_elf_invalid) {
	ElfFake elf(memory_);
	elf.FakeSetValid(false);

	EXPECT_FALSE(elf.IsValidPc(0x100));
	EXPECT_FALSE(elf.IsValidPc(0x200));
	}

	TEST_F(ElfTest, is_valid_pc_interface) {
	ElfFake elf(memory_);
	elf.FakeSetValid(true);

	ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
	elf.FakeSetInterface(interface);

	EXPECT_CALL(*interface, IsValidPc(0x1500)).WillOnce(::testing::Return(true));

	EXPECT_TRUE(elf.IsValidPc(0x1500));
	}

	TEST_F(ElfTest, is_valid_pc_from_gnu_debugdata) {
	ElfFake elf(memory_);
	elf.FakeSetValid(true);

	ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
	elf.FakeSetInterface(interface);
	ElfInterfaceMock* gnu_interface = new ElfInterfaceMock(memory_);
	elf.FakeSetGnuDebugdataInterface(gnu_interface);

	EXPECT_CALL(*interface, IsValidPc(0x1500)).WillOnce(::testing::Return(false));
	EXPECT_CALL(*gnu_interface, IsValidPc(0x1500)).WillOnce(::testing::Return(true));

	EXPECT_TRUE(elf.IsValidPc(0x1500));
	}

	TEST_F(ElfTest, error_code_not_valid) {
	ElfFake elf(memory_);
	elf.FakeSetValid(false);

	ErrorData error{ERROR_MEMORY_INVALID, 0x100};
	elf.GetLastError(&error);
	EXPECT_EQ(ERROR_MEMORY_INVALID, error.code);
	EXPECT_EQ(0x100U, error.address);
	}

	TEST_F(ElfTest, error_code_valid) {
	ElfFake elf(memory_);
	elf.FakeSetValid(true);
	ElfInterfaceFake* interface = new ElfInterfaceFake(memory_);
	elf.FakeSetInterface(interface);
	interface->FakeSetErrorCode(ERROR_MEMORY_INVALID);
	interface->FakeSetErrorAddress(0x1000);

	ErrorData error{ERROR_NONE, 0};
	elf.GetLastError(&error);
	EXPECT_EQ(ERROR_MEMORY_INVALID, error.code);
	EXPECT_EQ(0x1000U, error.address);
	EXPECT_EQ(ERROR_MEMORY_INVALID, elf.GetLastErrorCode());
	EXPECT_EQ(0x1000U, elf.GetLastErrorAddress());
	}

	} // namespace unwindstack