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android_system_core/libunwindstack/tests/ElfInterfaceTest.cpp
Christopher Ferris e69f470933 Multiple bugfixes, small restructuring. 
- Move the load bias stored out of ElfInterface into Elf. For the compressed
  sections, the load bias was not the same as the data from the uncompressed
  section.
- Move the initialization of the compressed section into Init. It was too easy
  to forget to call the init of the compressed section.
- Do not automatically add in load bias to the pc before calling ElfInterface
  code. Do all of the pc manipulations in the Elf object.
- Change the interface GetFunctionName code to pass in the load_bias instead
  of modifying the pc inside the code.
- Modify the Step function to pass in the elf offset, not add it to the pc.
  It is necessary to have two different relative values when executing the
  Step: a pc that is relative to the beginning of the elf for the reading data
  the actual instructions when trying to determine if this is in a signal
  frame, and a pc that is relative to the map for finding the appropriate
  unwind information.
- Add a feature to Unwinder so that an unwind can be stopped if it ends up
  in map that has a specified suffix. This is so that the ART unwinding
  code doesn't require skipping the compressed section. Instead, stop at
  if trying to unwind through a known suffix code that means the code is
  in java code. This is important because the compressed section data is
  not only used by the jave compiled code, so that will continue to work.
- Fix tests for restructuring, add new tests for new functionality.

Test: Ran art test 137-cfi using new unwinder as default.
Test: Ran new unit tests.
Change-Id: I42e658c64c5e14f698ba34944a3043afac967884
2017-10-20 11:15:32 -07:00

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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.
*/
#include <elf.h>
#include <memory>
#include <gtest/gtest.h>
#include <unwindstack/ElfInterface.h>
#include "DwarfEncoding.h"
#include "ElfInterfaceArm.h"
#include "ElfFake.h"
#include "MemoryFake.h"
#if !defined(PT_ARM_EXIDX)
#define PT_ARM_EXIDX 0x70000001
#endif
#if !defined(EM_AARCH64)
#define EM_AARCH64 183
#endif
namespace unwindstack {
class ElfInterfaceTest : public ::testing::Test {
protected:
void SetUp() override {
memory_.Clear();
}
void SetStringMemory(uint64_t offset, const char* string) {
memory_.SetMemory(offset, string, strlen(string) + 1);
}
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void SinglePtLoad();
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void MultipleExecutablePtLoads();
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void MultipleExecutablePtLoadsIncrementsNotSizeOfPhdr();
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void NonExecutablePtLoads();
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void ManyPhdrs();
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void Soname();
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void SonameAfterDtNull();
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void SonameSize();
template <typename ElfType>
void InitHeadersEhFrameTest();
template <typename ElfType>
void InitHeadersDebugFrame();
template <typename ElfType>
void InitHeadersEhFrameFail();
template <typename ElfType>
void InitHeadersDebugFrameFail();
template <typename Ehdr, typename Shdr, typename ElfInterfaceType>
void InitSectionHeadersMalformed();
template <typename Ehdr, typename Shdr, typename Sym, typename ElfInterfaceType>
void InitSectionHeaders(uint64_t entry_size);
template <typename Ehdr, typename Shdr, typename ElfInterfaceType>
void InitSectionHeadersOffsets();
template <typename Sym>
void InitSym(uint64_t offset, uint32_t value, uint32_t size, uint32_t name_offset,
uint64_t sym_offset, const char* name);
MemoryFake memory_;
};
template <typename Sym>
void ElfInterfaceTest::InitSym(uint64_t offset, uint32_t value, uint32_t size, uint32_t name_offset,
uint64_t sym_offset, const char* name) {
Sym sym;
memset(&sym, 0, sizeof(sym));
sym.st_info = STT_FUNC;
sym.st_value = value;
sym.st_size = size;
sym.st_name = name_offset;
sym.st_shndx = SHN_COMMON;
memory_.SetMemory(offset, &sym, sizeof(sym));
memory_.SetMemory(sym_offset + name_offset, name, strlen(name) + 1);
}
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void ElfInterfaceTest::SinglePtLoad() {
std::unique_ptr<ElfInterface> elf(new ElfInterfaceType(&memory_));
Ehdr ehdr;
memset(&ehdr, 0, sizeof(ehdr));
ehdr.e_phoff = 0x100;
ehdr.e_phnum = 1;
ehdr.e_phentsize = sizeof(Phdr);
memory_.SetMemory(0, &ehdr, sizeof(ehdr));
Phdr phdr;
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_LOAD;
phdr.p_vaddr = 0x2000;
phdr.p_memsz = 0x10000;
phdr.p_flags = PF_R | PF_X;
phdr.p_align = 0x1000;
memory_.SetMemory(0x100, &phdr, sizeof(phdr));
uint64_t load_bias = 0;
ASSERT_TRUE(elf->Init(&load_bias));
EXPECT_EQ(0x2000U, load_bias);
const std::unordered_map<uint64_t, LoadInfo>& pt_loads = elf->pt_loads();
ASSERT_EQ(1U, pt_loads.size());
LoadInfo load_data = pt_loads.at(0);
ASSERT_EQ(0U, load_data.offset);
ASSERT_EQ(0x2000U, load_data.table_offset);
ASSERT_EQ(0x10000U, load_data.table_size);
}
TEST_F(ElfInterfaceTest, elf32_single_pt_load) {
SinglePtLoad<Elf32_Ehdr, Elf32_Phdr, Elf32_Dyn, ElfInterface32>();
}
TEST_F(ElfInterfaceTest, elf64_single_pt_load) {
SinglePtLoad<Elf64_Ehdr, Elf64_Phdr, Elf64_Dyn, ElfInterface64>();
}
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void ElfInterfaceTest::MultipleExecutablePtLoads() {
std::unique_ptr<ElfInterface> elf(new ElfInterfaceType(&memory_));
Ehdr ehdr;
memset(&ehdr, 0, sizeof(ehdr));
ehdr.e_phoff = 0x100;
ehdr.e_phnum = 3;
ehdr.e_phentsize = sizeof(Phdr);
memory_.SetMemory(0, &ehdr, sizeof(ehdr));
Phdr phdr;
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_LOAD;
phdr.p_vaddr = 0x2000;
phdr.p_memsz = 0x10000;
phdr.p_flags = PF_R | PF_X;
phdr.p_align = 0x1000;
memory_.SetMemory(0x100, &phdr, sizeof(phdr));
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_LOAD;
phdr.p_offset = 0x1000;
phdr.p_vaddr = 0x2001;
phdr.p_memsz = 0x10001;
phdr.p_flags = PF_R | PF_X;
phdr.p_align = 0x1001;
memory_.SetMemory(0x100 + sizeof(phdr), &phdr, sizeof(phdr));
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_LOAD;
phdr.p_offset = 0x2000;
phdr.p_vaddr = 0x2002;
phdr.p_memsz = 0x10002;
phdr.p_flags = PF_R | PF_X;
phdr.p_align = 0x1002;
memory_.SetMemory(0x100 + 2 * sizeof(phdr), &phdr, sizeof(phdr));
uint64_t load_bias = 0;
ASSERT_TRUE(elf->Init(&load_bias));
EXPECT_EQ(0x2000U, load_bias);
const std::unordered_map<uint64_t, LoadInfo>& pt_loads = elf->pt_loads();
ASSERT_EQ(3U, pt_loads.size());
LoadInfo load_data = pt_loads.at(0);
ASSERT_EQ(0U, load_data.offset);
ASSERT_EQ(0x2000U, load_data.table_offset);
ASSERT_EQ(0x10000U, load_data.table_size);
load_data = pt_loads.at(0x1000);
ASSERT_EQ(0x1000U, load_data.offset);
ASSERT_EQ(0x2001U, load_data.table_offset);
ASSERT_EQ(0x10001U, load_data.table_size);
load_data = pt_loads.at(0x2000);
ASSERT_EQ(0x2000U, load_data.offset);
ASSERT_EQ(0x2002U, load_data.table_offset);
ASSERT_EQ(0x10002U, load_data.table_size);
}
TEST_F(ElfInterfaceTest, elf32_multiple_executable_pt_loads) {
MultipleExecutablePtLoads<Elf32_Ehdr, Elf32_Phdr, Elf32_Dyn, ElfInterface32>();
}
TEST_F(ElfInterfaceTest, elf64_multiple_executable_pt_loads) {
MultipleExecutablePtLoads<Elf64_Ehdr, Elf64_Phdr, Elf64_Dyn, ElfInterface64>();
}
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void ElfInterfaceTest::MultipleExecutablePtLoadsIncrementsNotSizeOfPhdr() {
std::unique_ptr<ElfInterface> elf(new ElfInterfaceType(&memory_));
Ehdr ehdr;
memset(&ehdr, 0, sizeof(ehdr));
ehdr.e_phoff = 0x100;
ehdr.e_phnum = 3;
ehdr.e_phentsize = sizeof(Phdr) + 100;
memory_.SetMemory(0, &ehdr, sizeof(ehdr));
Phdr phdr;
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_LOAD;
phdr.p_vaddr = 0x2000;
phdr.p_memsz = 0x10000;
phdr.p_flags = PF_R | PF_X;
phdr.p_align = 0x1000;
memory_.SetMemory(0x100, &phdr, sizeof(phdr));
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_LOAD;
phdr.p_offset = 0x1000;
phdr.p_vaddr = 0x2001;
phdr.p_memsz = 0x10001;
phdr.p_flags = PF_R | PF_X;
phdr.p_align = 0x1001;
memory_.SetMemory(0x100 + sizeof(phdr) + 100, &phdr, sizeof(phdr));
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_LOAD;
phdr.p_offset = 0x2000;
phdr.p_vaddr = 0x2002;
phdr.p_memsz = 0x10002;
phdr.p_flags = PF_R | PF_X;
phdr.p_align = 0x1002;
memory_.SetMemory(0x100 + 2 * (sizeof(phdr) + 100), &phdr, sizeof(phdr));
uint64_t load_bias = 0;
ASSERT_TRUE(elf->Init(&load_bias));
EXPECT_EQ(0x2000U, load_bias);
const std::unordered_map<uint64_t, LoadInfo>& pt_loads = elf->pt_loads();
ASSERT_EQ(3U, pt_loads.size());
LoadInfo load_data = pt_loads.at(0);
ASSERT_EQ(0U, load_data.offset);
ASSERT_EQ(0x2000U, load_data.table_offset);
ASSERT_EQ(0x10000U, load_data.table_size);
load_data = pt_loads.at(0x1000);
ASSERT_EQ(0x1000U, load_data.offset);
ASSERT_EQ(0x2001U, load_data.table_offset);
ASSERT_EQ(0x10001U, load_data.table_size);
load_data = pt_loads.at(0x2000);
ASSERT_EQ(0x2000U, load_data.offset);
ASSERT_EQ(0x2002U, load_data.table_offset);
ASSERT_EQ(0x10002U, load_data.table_size);
}
TEST_F(ElfInterfaceTest, elf32_multiple_executable_pt_loads_increments_not_size_of_phdr) {
MultipleExecutablePtLoadsIncrementsNotSizeOfPhdr<Elf32_Ehdr, Elf32_Phdr, Elf32_Dyn,
ElfInterface32>();
}
TEST_F(ElfInterfaceTest, elf64_multiple_executable_pt_loads_increments_not_size_of_phdr) {
MultipleExecutablePtLoadsIncrementsNotSizeOfPhdr<Elf64_Ehdr, Elf64_Phdr, Elf64_Dyn,
ElfInterface64>();
}
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void ElfInterfaceTest::NonExecutablePtLoads() {
std::unique_ptr<ElfInterface> elf(new ElfInterfaceType(&memory_));
Ehdr ehdr;
memset(&ehdr, 0, sizeof(ehdr));
ehdr.e_phoff = 0x100;
ehdr.e_phnum = 3;
ehdr.e_phentsize = sizeof(Phdr);
memory_.SetMemory(0, &ehdr, sizeof(ehdr));
Phdr phdr;
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_LOAD;
phdr.p_vaddr = 0x2000;
phdr.p_memsz = 0x10000;
phdr.p_flags = PF_R;
phdr.p_align = 0x1000;
memory_.SetMemory(0x100, &phdr, sizeof(phdr));
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_LOAD;
phdr.p_offset = 0x1000;
phdr.p_vaddr = 0x2001;
phdr.p_memsz = 0x10001;
phdr.p_flags = PF_R | PF_X;
phdr.p_align = 0x1001;
memory_.SetMemory(0x100 + sizeof(phdr), &phdr, sizeof(phdr));
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_LOAD;
phdr.p_offset = 0x2000;
phdr.p_vaddr = 0x2002;
phdr.p_memsz = 0x10002;
phdr.p_flags = PF_R;
phdr.p_align = 0x1002;
memory_.SetMemory(0x100 + 2 * sizeof(phdr), &phdr, sizeof(phdr));
uint64_t load_bias = 0;
ASSERT_TRUE(elf->Init(&load_bias));
EXPECT_EQ(0U, load_bias);
const std::unordered_map<uint64_t, LoadInfo>& pt_loads = elf->pt_loads();
ASSERT_EQ(1U, pt_loads.size());
LoadInfo load_data = pt_loads.at(0x1000);
ASSERT_EQ(0x1000U, load_data.offset);
ASSERT_EQ(0x2001U, load_data.table_offset);
ASSERT_EQ(0x10001U, load_data.table_size);
}
TEST_F(ElfInterfaceTest, elf32_non_executable_pt_loads) {
NonExecutablePtLoads<Elf32_Ehdr, Elf32_Phdr, Elf32_Dyn, ElfInterface32>();
}
TEST_F(ElfInterfaceTest, elf64_non_executable_pt_loads) {
NonExecutablePtLoads<Elf64_Ehdr, Elf64_Phdr, Elf64_Dyn, ElfInterface64>();
}
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void ElfInterfaceTest::ManyPhdrs() {
std::unique_ptr<ElfInterface> elf(new ElfInterfaceType(&memory_));
Ehdr ehdr;
memset(&ehdr, 0, sizeof(ehdr));
ehdr.e_phoff = 0x100;
ehdr.e_phnum = 7;
ehdr.e_phentsize = sizeof(Phdr);
memory_.SetMemory(0, &ehdr, sizeof(ehdr));
Phdr phdr;
uint64_t phdr_offset = 0x100;
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_LOAD;
phdr.p_vaddr = 0x2000;
phdr.p_memsz = 0x10000;
phdr.p_flags = PF_R | PF_X;
phdr.p_align = 0x1000;
memory_.SetMemory(phdr_offset, &phdr, sizeof(phdr));
phdr_offset += sizeof(phdr);
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_GNU_EH_FRAME;
memory_.SetMemory(phdr_offset, &phdr, sizeof(phdr));
phdr_offset += sizeof(phdr);
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_DYNAMIC;
memory_.SetMemory(phdr_offset, &phdr, sizeof(phdr));
phdr_offset += sizeof(phdr);
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_INTERP;
memory_.SetMemory(phdr_offset, &phdr, sizeof(phdr));
phdr_offset += sizeof(phdr);
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_NOTE;
memory_.SetMemory(phdr_offset, &phdr, sizeof(phdr));
phdr_offset += sizeof(phdr);
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_SHLIB;
memory_.SetMemory(phdr_offset, &phdr, sizeof(phdr));
phdr_offset += sizeof(phdr);
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_GNU_EH_FRAME;
memory_.SetMemory(phdr_offset, &phdr, sizeof(phdr));
phdr_offset += sizeof(phdr);
uint64_t load_bias = 0;
ASSERT_TRUE(elf->Init(&load_bias));
EXPECT_EQ(0x2000U, load_bias);
const std::unordered_map<uint64_t, LoadInfo>& pt_loads = elf->pt_loads();
ASSERT_EQ(1U, pt_loads.size());
LoadInfo load_data = pt_loads.at(0);
ASSERT_EQ(0U, load_data.offset);
ASSERT_EQ(0x2000U, load_data.table_offset);
ASSERT_EQ(0x10000U, load_data.table_size);
}
TEST_F(ElfInterfaceTest, elf32_many_phdrs) {
ElfInterfaceTest::ManyPhdrs<Elf32_Ehdr, Elf32_Phdr, Elf32_Dyn, ElfInterface32>();
}
TEST_F(ElfInterfaceTest, elf64_many_phdrs) {
ElfInterfaceTest::ManyPhdrs<Elf64_Ehdr, Elf64_Phdr, Elf64_Dyn, ElfInterface64>();
}
TEST_F(ElfInterfaceTest, elf32_arm) {
ElfInterfaceArm elf_arm(&memory_);
Elf32_Ehdr ehdr;
memset(&ehdr, 0, sizeof(ehdr));
ehdr.e_phoff = 0x100;
ehdr.e_phnum = 1;
ehdr.e_phentsize = sizeof(Elf32_Phdr);
memory_.SetMemory(0, &ehdr, sizeof(ehdr));
Elf32_Phdr phdr;
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_ARM_EXIDX;
phdr.p_vaddr = 0x2000;
phdr.p_memsz = 16;
memory_.SetMemory(0x100, &phdr, sizeof(phdr));
// Add arm exidx entries.
memory_.SetData32(0x2000, 0x1000);
memory_.SetData32(0x2008, 0x1000);
uint64_t load_bias = 0;
ASSERT_TRUE(elf_arm.Init(&load_bias));
EXPECT_EQ(0U, load_bias);
std::vector<uint32_t> entries;
for (auto addr : elf_arm) {
entries.push_back(addr);
}
ASSERT_EQ(2U, entries.size());
ASSERT_EQ(0x3000U, entries[0]);
ASSERT_EQ(0x3008U, entries[1]);
ASSERT_EQ(0x2000U, elf_arm.start_offset());
ASSERT_EQ(2U, elf_arm.total_entries());
}
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void ElfInterfaceTest::Soname() {
std::unique_ptr<ElfInterface> elf(new ElfInterfaceType(&memory_));
Ehdr ehdr;
memset(&ehdr, 0, sizeof(ehdr));
ehdr.e_phoff = 0x100;
ehdr.e_phnum = 1;
ehdr.e_phentsize = sizeof(Phdr);
memory_.SetMemory(0, &ehdr, sizeof(ehdr));
Phdr phdr;
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_DYNAMIC;
phdr.p_offset = 0x2000;
phdr.p_memsz = sizeof(Dyn) * 3;
memory_.SetMemory(0x100, &phdr, sizeof(phdr));
uint64_t offset = 0x2000;
Dyn dyn;
dyn.d_tag = DT_STRTAB;
dyn.d_un.d_ptr = 0x10000;
memory_.SetMemory(offset, &dyn, sizeof(dyn));
offset += sizeof(dyn);
dyn.d_tag = DT_STRSZ;
dyn.d_un.d_val = 0x1000;
memory_.SetMemory(offset, &dyn, sizeof(dyn));
offset += sizeof(dyn);
dyn.d_tag = DT_SONAME;
dyn.d_un.d_val = 0x10;
memory_.SetMemory(offset, &dyn, sizeof(dyn));
offset += sizeof(dyn);
dyn.d_tag = DT_NULL;
memory_.SetMemory(offset, &dyn, sizeof(dyn));
SetStringMemory(0x10010, "fake_soname.so");
uint64_t load_bias = 0;
ASSERT_TRUE(elf->Init(&load_bias));
EXPECT_EQ(0U, load_bias);
std::string name;
ASSERT_TRUE(elf->GetSoname(&name));
ASSERT_STREQ("fake_soname.so", name.c_str());
}
TEST_F(ElfInterfaceTest, elf32_soname) {
Soname<Elf32_Ehdr, Elf32_Phdr, Elf32_Dyn, ElfInterface32>();
}
TEST_F(ElfInterfaceTest, elf64_soname) {
Soname<Elf64_Ehdr, Elf64_Phdr, Elf64_Dyn, ElfInterface64>();
}
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void ElfInterfaceTest::SonameAfterDtNull() {
std::unique_ptr<ElfInterface> elf(new ElfInterfaceType(&memory_));
Ehdr ehdr;
memset(&ehdr, 0, sizeof(ehdr));
ehdr.e_phoff = 0x100;
ehdr.e_phnum = 1;
ehdr.e_phentsize = sizeof(Phdr);
memory_.SetMemory(0, &ehdr, sizeof(ehdr));
Phdr phdr;
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_DYNAMIC;
phdr.p_offset = 0x2000;
phdr.p_memsz = sizeof(Dyn) * 3;
memory_.SetMemory(0x100, &phdr, sizeof(phdr));
Dyn dyn;
uint64_t offset = 0x2000;
dyn.d_tag = DT_STRTAB;
dyn.d_un.d_ptr = 0x10000;
memory_.SetMemory(offset, &dyn, sizeof(dyn));
offset += sizeof(dyn);
dyn.d_tag = DT_STRSZ;
dyn.d_un.d_val = 0x1000;
memory_.SetMemory(offset, &dyn, sizeof(dyn));
offset += sizeof(dyn);
dyn.d_tag = DT_NULL;
memory_.SetMemory(offset, &dyn, sizeof(dyn));
offset += sizeof(dyn);
dyn.d_tag = DT_SONAME;
dyn.d_un.d_val = 0x10;
memory_.SetMemory(offset, &dyn, sizeof(dyn));
offset += sizeof(dyn);
SetStringMemory(0x10010, "fake_soname.so");
uint64_t load_bias = 0;
ASSERT_TRUE(elf->Init(&load_bias));
EXPECT_EQ(0U, load_bias);
std::string name;
ASSERT_FALSE(elf->GetSoname(&name));
}
TEST_F(ElfInterfaceTest, elf32_soname_after_dt_null) {
SonameAfterDtNull<Elf32_Ehdr, Elf32_Phdr, Elf32_Dyn, ElfInterface32>();
}
TEST_F(ElfInterfaceTest, elf64_soname_after_dt_null) {
SonameAfterDtNull<Elf64_Ehdr, Elf64_Phdr, Elf64_Dyn, ElfInterface64>();
}
template <typename Ehdr, typename Phdr, typename Dyn, typename ElfInterfaceType>
void ElfInterfaceTest::SonameSize() {
std::unique_ptr<ElfInterface> elf(new ElfInterfaceType(&memory_));
Ehdr ehdr;
memset(&ehdr, 0, sizeof(ehdr));
ehdr.e_phoff = 0x100;
ehdr.e_phnum = 1;
ehdr.e_phentsize = sizeof(Phdr);
memory_.SetMemory(0, &ehdr, sizeof(ehdr));
Phdr phdr;
memset(&phdr, 0, sizeof(phdr));
phdr.p_type = PT_DYNAMIC;
phdr.p_offset = 0x2000;
phdr.p_memsz = sizeof(Dyn);
memory_.SetMemory(0x100, &phdr, sizeof(phdr));
Dyn dyn;
uint64_t offset = 0x2000;
dyn.d_tag = DT_STRTAB;
dyn.d_un.d_ptr = 0x10000;
memory_.SetMemory(offset, &dyn, sizeof(dyn));
offset += sizeof(dyn);
dyn.d_tag = DT_STRSZ;
dyn.d_un.d_val = 0x10;
memory_.SetMemory(offset, &dyn, sizeof(dyn));
offset += sizeof(dyn);
dyn.d_tag = DT_SONAME;
dyn.d_un.d_val = 0x10;
memory_.SetMemory(offset, &dyn, sizeof(dyn));
offset += sizeof(dyn);
dyn.d_tag = DT_NULL;
memory_.SetMemory(offset, &dyn, sizeof(dyn));
SetStringMemory(0x10010, "fake_soname.so");
uint64_t load_bias = 0;
ASSERT_TRUE(elf->Init(&load_bias));
EXPECT_EQ(0U, load_bias);
std::string name;
ASSERT_FALSE(elf->GetSoname(&name));
}
TEST_F(ElfInterfaceTest, elf32_soname_size) {
SonameSize<Elf32_Ehdr, Elf32_Phdr, Elf32_Dyn, ElfInterface32>();
}
TEST_F(ElfInterfaceTest, elf64_soname_size) {
SonameSize<Elf64_Ehdr, Elf64_Phdr, Elf64_Dyn, ElfInterface64>();
}
template <typename ElfType>
void ElfInterfaceTest::InitHeadersEhFrameTest() {
ElfType elf(&memory_);
elf.FakeSetEhFrameOffset(0x10000);
elf.FakeSetEhFrameSize(0);
elf.FakeSetDebugFrameOffset(0);
elf.FakeSetDebugFrameSize(0);
memory_.SetMemory(0x10000,
std::vector<uint8_t>{0x1, DW_EH_PE_udata2, DW_EH_PE_udata2, DW_EH_PE_udata2});
memory_.SetData32(0x10004, 0x500);
memory_.SetData32(0x10008, 250);
elf.InitHeaders();
EXPECT_FALSE(elf.eh_frame() == nullptr);
EXPECT_TRUE(elf.debug_frame() == nullptr);
}
TEST_F(ElfInterfaceTest, init_headers_eh_frame32) {
InitHeadersEhFrameTest<ElfInterface32Fake>();
}
TEST_F(ElfInterfaceTest, init_headers_eh_frame64) {
InitHeadersEhFrameTest<ElfInterface64Fake>();
}
template <typename ElfType>
void ElfInterfaceTest::InitHeadersDebugFrame() {
ElfType elf(&memory_);
elf.FakeSetEhFrameOffset(0);
elf.FakeSetEhFrameSize(0);
elf.FakeSetDebugFrameOffset(0x5000);
elf.FakeSetDebugFrameSize(0x200);
memory_.SetData32(0x5000, 0xfc);
memory_.SetData32(0x5004, 0xffffffff);
memory_.SetData8(0x5008, 1);
memory_.SetData8(0x5009, '\0');
memory_.SetData32(0x5100, 0xfc);
memory_.SetData32(0x5104, 0);
memory_.SetData32(0x5108, 0x1500);
memory_.SetData32(0x510c, 0x200);
elf.InitHeaders();
EXPECT_TRUE(elf.eh_frame() == nullptr);
EXPECT_FALSE(elf.debug_frame() == nullptr);
}
TEST_F(ElfInterfaceTest, init_headers_debug_frame32) {
InitHeadersDebugFrame<ElfInterface32Fake>();
}
TEST_F(ElfInterfaceTest, init_headers_debug_frame64) {
InitHeadersDebugFrame<ElfInterface64Fake>();
}
template <typename ElfType>
void ElfInterfaceTest::InitHeadersEhFrameFail() {
ElfType elf(&memory_);
elf.FakeSetEhFrameOffset(0x1000);
elf.FakeSetEhFrameSize(0x100);
elf.FakeSetDebugFrameOffset(0);
elf.FakeSetDebugFrameSize(0);
elf.InitHeaders();
EXPECT_TRUE(elf.eh_frame() == nullptr);
EXPECT_EQ(0U, elf.eh_frame_offset());
EXPECT_EQ(static_cast<uint64_t>(-1), elf.eh_frame_size());
EXPECT_TRUE(elf.debug_frame() == nullptr);
}
TEST_F(ElfInterfaceTest, init_headers_eh_frame32_fail) {
InitHeadersEhFrameFail<ElfInterface32Fake>();
}
TEST_F(ElfInterfaceTest, init_headers_eh_frame64_fail) {
InitHeadersEhFrameFail<ElfInterface64Fake>();
}
template <typename ElfType>
void ElfInterfaceTest::InitHeadersDebugFrameFail() {
ElfType elf(&memory_);
elf.FakeSetEhFrameOffset(0);
elf.FakeSetEhFrameSize(0);
elf.FakeSetDebugFrameOffset(0x1000);
elf.FakeSetDebugFrameSize(0x100);
elf.InitHeaders();
EXPECT_TRUE(elf.eh_frame() == nullptr);
EXPECT_TRUE(elf.debug_frame() == nullptr);
EXPECT_EQ(0U, elf.debug_frame_offset());
EXPECT_EQ(static_cast<uint64_t>(-1), elf.debug_frame_size());
}
TEST_F(ElfInterfaceTest, init_headers_debug_frame32_fail) {
InitHeadersDebugFrameFail<ElfInterface32Fake>();
}
TEST_F(ElfInterfaceTest, init_headers_debug_frame64_fail) {
InitHeadersDebugFrameFail<ElfInterface64Fake>();
}
template <typename Ehdr, typename Shdr, typename ElfInterfaceType>
void ElfInterfaceTest::InitSectionHeadersMalformed() {
std::unique_ptr<ElfInterfaceType> elf(new ElfInterfaceType(&memory_));
Ehdr ehdr;
memset(&ehdr, 0, sizeof(ehdr));
ehdr.e_shoff = 0x1000;
ehdr.e_shnum = 10;
ehdr.e_shentsize = sizeof(Shdr);
memory_.SetMemory(0, &ehdr, sizeof(ehdr));
uint64_t load_bias = 0;
ASSERT_TRUE(elf->Init(&load_bias));
EXPECT_EQ(0U, load_bias);
}
TEST_F(ElfInterfaceTest, init_section_headers_malformed32) {
InitSectionHeadersMalformed<Elf32_Ehdr, Elf32_Shdr, ElfInterface32>();
}
TEST_F(ElfInterfaceTest, init_section_headers_malformed64) {
InitSectionHeadersMalformed<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>();
}
template <typename Ehdr, typename Shdr, typename Sym, typename ElfInterfaceType>
void ElfInterfaceTest::InitSectionHeaders(uint64_t entry_size) {
std::unique_ptr<ElfInterfaceType> elf(new ElfInterfaceType(&memory_));
uint64_t offset = 0x1000;
Ehdr ehdr;
memset(&ehdr, 0, sizeof(ehdr));
ehdr.e_shoff = offset;
ehdr.e_shnum = 10;
ehdr.e_shentsize = entry_size;
memory_.SetMemory(0, &ehdr, sizeof(ehdr));
offset += ehdr.e_shentsize;
Shdr shdr;
memset(&shdr, 0, sizeof(shdr));
shdr.sh_type = SHT_SYMTAB;
shdr.sh_link = 4;
shdr.sh_addr = 0x5000;
shdr.sh_offset = 0x5000;
shdr.sh_entsize = sizeof(Sym);
shdr.sh_size = shdr.sh_entsize * 10;
memory_.SetMemory(offset, &shdr, sizeof(shdr));
offset += ehdr.e_shentsize;
memset(&shdr, 0, sizeof(shdr));
shdr.sh_type = SHT_DYNSYM;
shdr.sh_link = 4;
shdr.sh_addr = 0x6000;
shdr.sh_offset = 0x6000;
shdr.sh_entsize = sizeof(Sym);
shdr.sh_size = shdr.sh_entsize * 10;
memory_.SetMemory(offset, &shdr, sizeof(shdr));
offset += ehdr.e_shentsize;
memset(&shdr, 0, sizeof(shdr));
shdr.sh_type = SHT_PROGBITS;
shdr.sh_name = 0xa000;
memory_.SetMemory(offset, &shdr, sizeof(shdr));
offset += ehdr.e_shentsize;
// The string data for the entries.
memset(&shdr, 0, sizeof(shdr));
shdr.sh_type = SHT_STRTAB;
shdr.sh_name = 0x20000;
shdr.sh_offset = 0xf000;
shdr.sh_size = 0x1000;
memory_.SetMemory(offset, &shdr, sizeof(shdr));
offset += ehdr.e_shentsize;
InitSym<Sym>(0x5000, 0x90000, 0x1000, 0x100, 0xf000, "function_one");
InitSym<Sym>(0x6000, 0xd0000, 0x1000, 0x300, 0xf000, "function_two");
uint64_t load_bias = 0;
ASSERT_TRUE(elf->Init(&load_bias));
EXPECT_EQ(0U, load_bias);
EXPECT_EQ(0U, elf->debug_frame_offset());
EXPECT_EQ(0U, elf->debug_frame_size());
EXPECT_EQ(0U, elf->gnu_debugdata_offset());
EXPECT_EQ(0U, elf->gnu_debugdata_size());
// Look in the first symbol table.
std::string name;
uint64_t name_offset;
ASSERT_TRUE(elf->GetFunctionName(0x90010, 0, &name, &name_offset));
EXPECT_EQ("function_one", name);
EXPECT_EQ(16U, name_offset);
ASSERT_TRUE(elf->GetFunctionName(0xd0020, 0, &name, &name_offset));
EXPECT_EQ("function_two", name);
EXPECT_EQ(32U, name_offset);
}
TEST_F(ElfInterfaceTest, init_section_headers32) {
InitSectionHeaders<Elf32_Ehdr, Elf32_Shdr, Elf32_Sym, ElfInterface32>(sizeof(Elf32_Shdr));
}
TEST_F(ElfInterfaceTest, init_section_headers64) {
InitSectionHeaders<Elf64_Ehdr, Elf64_Shdr, Elf64_Sym, ElfInterface64>(sizeof(Elf64_Shdr));
}
TEST_F(ElfInterfaceTest, init_section_headers_non_std_entry_size32) {
InitSectionHeaders<Elf32_Ehdr, Elf32_Shdr, Elf32_Sym, ElfInterface32>(0x100);
}
TEST_F(ElfInterfaceTest, init_section_headers_non_std_entry_size64) {
InitSectionHeaders<Elf64_Ehdr, Elf64_Shdr, Elf64_Sym, ElfInterface64>(0x100);
}
template <typename Ehdr, typename Shdr, typename ElfInterfaceType>
void ElfInterfaceTest::InitSectionHeadersOffsets() {
std::unique_ptr<ElfInterfaceType> elf(new ElfInterfaceType(&memory_));
uint64_t offset = 0x2000;
Ehdr ehdr;
memset(&ehdr, 0, sizeof(ehdr));
ehdr.e_shoff = offset;
ehdr.e_shnum = 10;
ehdr.e_shentsize = sizeof(Shdr);
ehdr.e_shstrndx = 2;
memory_.SetMemory(0, &ehdr, sizeof(ehdr));
offset += ehdr.e_shentsize;
Shdr shdr;
memset(&shdr, 0, sizeof(shdr));
shdr.sh_type = SHT_PROGBITS;
shdr.sh_link = 2;
shdr.sh_name = 0x200;
shdr.sh_addr = 0x5000;
shdr.sh_offset = 0x5000;
shdr.sh_entsize = 0x100;
shdr.sh_size = 0x800;
memory_.SetMemory(offset, &shdr, sizeof(shdr));
offset += ehdr.e_shentsize;
// The string data for section header names.
memset(&shdr, 0, sizeof(shdr));
shdr.sh_type = SHT_STRTAB;
shdr.sh_name = 0x20000;
shdr.sh_offset = 0xf000;
shdr.sh_size = 0x1000;
memory_.SetMemory(offset, &shdr, sizeof(shdr));
offset += ehdr.e_shentsize;
memset(&shdr, 0, sizeof(shdr));
shdr.sh_type = SHT_PROGBITS;
shdr.sh_link = 2;
shdr.sh_name = 0x100;
shdr.sh_addr = 0x6000;
shdr.sh_offset = 0x6000;
shdr.sh_entsize = 0x100;
shdr.sh_size = 0x500;
memory_.SetMemory(offset, &shdr, sizeof(shdr));
offset += ehdr.e_shentsize;
memory_.SetMemory(0xf100, ".debug_frame", sizeof(".debug_frame"));
memory_.SetMemory(0xf200, ".gnu_debugdata", sizeof(".gnu_debugdata"));
uint64_t load_bias = 0;
ASSERT_TRUE(elf->Init(&load_bias));
EXPECT_EQ(0U, load_bias);
EXPECT_EQ(0x6000U, elf->debug_frame_offset());
EXPECT_EQ(0x500U, elf->debug_frame_size());
EXPECT_EQ(0x5000U, elf->gnu_debugdata_offset());
EXPECT_EQ(0x800U, elf->gnu_debugdata_size());
}
TEST_F(ElfInterfaceTest, init_section_headers_offsets32) {
InitSectionHeadersOffsets<Elf32_Ehdr, Elf32_Shdr, ElfInterface32>();
}
TEST_F(ElfInterfaceTest, init_section_headers_offsets64) {
InitSectionHeadersOffsets<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>();
}
} // namespace unwindstack
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