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//===-- TestObjectFileELF.cpp -----------------------------------*- C++ -*-===//
//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "Plugins/ObjectFile/ELF/ObjectFileELF.h"
#include "Plugins/SymbolVendor/ELF/SymbolVendorELF.h"
#include "TestingSupport/TestUtilities.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/Section.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "llvm/ADT/Optional.h"
#include "llvm/Support/Compression.h"
#include "llvm/Support/FileUtilities.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/raw_ostream.h"
#include "gtest/gtest.h"
using namespace lldb_private;
using namespace lldb;
class ObjectFileELFTest : public testing::Test {
public:
void SetUp() override {
FileSystem::Initialize();
HostInfo::Initialize();
ObjectFileELF::Initialize();
SymbolVendorELF::Initialize();
}
void TearDown() override {
SymbolVendorELF::Terminate();
ObjectFileELF::Terminate();
HostInfo::Terminate();
FileSystem::Terminate();
}
protected:
};
#define ASSERT_NO_ERROR(x) \
if (std::error_code ASSERT_NO_ERROR_ec = x) { \
llvm::SmallString<128> MessageStorage; \
llvm::raw_svector_ostream Message(MessageStorage); \
Message << #x ": did not return errc::success.\n" \
<< "error number: " << ASSERT_NO_ERROR_ec.value() << "\n" \
<< "error message: " << ASSERT_NO_ERROR_ec.message() << "\n"; \
GTEST_FATAL_FAILURE_(MessageStorage.c_str()); \
} else { \
}
TEST_F(ObjectFileELFTest, SectionsResolveConsistently) {
std::string yaml = GetInputFilePath("sections-resolve-consistently.yaml");
llvm::SmallString<128> obj;
ASSERT_NO_ERROR(llvm::sys::fs::createTemporaryFile(
"sections-resolve-consistently-%%%%%%", "obj", obj));
llvm::FileRemover remover(obj);
llvm::StringRef args[] = {YAML2OBJ, yaml};
llvm::StringRef obj_ref = obj;
const llvm::Optional<llvm::StringRef> redirects[] = {llvm::None, obj_ref,
llvm::None};
ASSERT_EQ(0,
llvm::sys::ExecuteAndWait(YAML2OBJ, args, llvm::None, redirects));
uint64_t size;
ASSERT_NO_ERROR(llvm::sys::fs::file_size(obj, size));
ASSERT_GT(size, 0u);
ModuleSpec spec{FileSpec(obj)};
spec.GetSymbolFileSpec().SetFile(obj, FileSpec::Style::native);
auto module_sp = std::make_shared<Module>(spec);
SectionList *list = module_sp->GetSectionList();
ASSERT_NE(nullptr, list);
auto bss_sp = list->FindSectionByName(ConstString(".bss"));
ASSERT_NE(nullptr, bss_sp);
auto data_sp = list->FindSectionByName(ConstString(".data"));
ASSERT_NE(nullptr, data_sp);
auto text_sp = list->FindSectionByName(ConstString(".text"));
ASSERT_NE(nullptr, text_sp);
const Symbol *X = module_sp->FindFirstSymbolWithNameAndType(ConstString("X"),
eSymbolTypeAny);
ASSERT_NE(nullptr, X);
EXPECT_EQ(bss_sp, X->GetAddress().GetSection());
const Symbol *Y = module_sp->FindFirstSymbolWithNameAndType(ConstString("Y"),
eSymbolTypeAny);
ASSERT_NE(nullptr, Y);
EXPECT_EQ(data_sp, Y->GetAddress().GetSection());
const Symbol *start = module_sp->FindFirstSymbolWithNameAndType(
ConstString("_start"), eSymbolTypeAny);
ASSERT_NE(nullptr, start);
EXPECT_EQ(text_sp, start->GetAddress().GetSection());
}
// Test that GetModuleSpecifications works on an "atypical" object file which
// has section headers right after the ELF header (instead of the more common
// layout where the section headers are at the very end of the object file).
//
// Test file generated with yaml2obj (@svn rev 324254) from the following input:
/*
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_EXEC
Machine: EM_X86_64
Entry: 0x00000000004003D0
Sections:
- Name: .note.gnu.build-id
Type: SHT_NOTE
Flags: [ SHF_ALLOC ]
Address: 0x0000000000400274
AddressAlign: 0x0000000000000004
Content: 040000001400000003000000474E55001B8A73AC238390E32A7FF4AC8EBE4D6A41ECF5C9
- Name: .text
Type: SHT_PROGBITS
Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
Address: 0x00000000004003D0
AddressAlign: 0x0000000000000010
Content: DEADBEEFBAADF00D
...
*/
TEST_F(ObjectFileELFTest, GetModuleSpecifications_EarlySectionHeaders) {
std::string SO = GetInputFilePath("early-section-headers.so");
ModuleSpecList Specs;
ASSERT_EQ(1u, ObjectFile::GetModuleSpecifications(FileSpec(SO), 0, 0, Specs));
ModuleSpec Spec;
ASSERT_TRUE(Specs.GetModuleSpecAtIndex(0, Spec)) ;
UUID Uuid;
Uuid.SetFromStringRef("1b8a73ac238390e32a7ff4ac8ebe4d6a41ecf5c9", 20);
EXPECT_EQ(Spec.GetUUID(), Uuid);
}
static void CHECK_ABS32(uint8_t *bytes, uint32_t offset, uint32_t addend) {
uint32_t res;
memcpy(&res, reinterpret_cast<uint32_t *>(bytes + offset), sizeof(uint32_t));
ASSERT_EQ(addend, res);
}
static void CHECK_ABS64(uint8_t *bytes, uint64_t offset, uint64_t addend) {
uint64_t res;
memcpy(&res, reinterpret_cast<uint64_t *>(bytes + offset), sizeof(uint64_t));
ASSERT_EQ(addend, res);
}
TEST_F(ObjectFileELFTest, TestAARCH64Relocations) {
std::string yaml = GetInputFilePath("debug-info-relocations.pcm.yaml");
llvm::SmallString<128> obj;
ASSERT_NO_ERROR(llvm::sys::fs::createTemporaryFile(
"debug-info-relocations-%%%%%%", "obj", obj));
llvm::FileRemover remover(obj);
llvm::StringRef args[] = {YAML2OBJ, yaml};
llvm::StringRef obj_ref = obj;
const llvm::Optional<llvm::StringRef> redirects[] = {llvm::None, obj_ref,
llvm::None};
ASSERT_EQ(0,
llvm::sys::ExecuteAndWait(YAML2OBJ, args, llvm::None, redirects));
uint64_t size;
ASSERT_NO_ERROR(llvm::sys::fs::file_size(obj, size));
ASSERT_GT(size, 0u);
ModuleSpec spec{FileSpec(obj)};
spec.GetSymbolFileSpec().SetFile(obj, FileSpec::Style::native);
auto module_sp = std::make_shared<Module>(spec);
auto objfile = static_cast<ObjectFileELF *>(module_sp->GetObjectFile());
SectionList *section_list = objfile->GetSectionList();
ASSERT_NE(nullptr, section_list);
auto debug_info_sp =
section_list->FindSectionByName(ConstString(".debug_info"));
ASSERT_NE(nullptr, debug_info_sp);
objfile->RelocateSection(debug_info_sp.get());
DataExtractor data;
// length of 0x10 is not needed but length 0x0 crashes
objfile->GetData(0x00, 0x10, data);
DataBufferSP &data_buffer_sp = data.GetSharedDataBuffer();
uint8_t *bytes = data_buffer_sp->GetBytes();
addr_t debug_info_offset = debug_info_sp->GetFileOffset();
bytes += debug_info_offset;
// Sanity check - The first byte from the yaml file is 0x47
ASSERT_EQ(0x47, *bytes);
// .rela.debug_info contains 9 relocations:
// 7 R_AARCH64_ABS32 - 2 R_AARCH64_ABS64
// None have a value. Four have addends.
CHECK_ABS32(bytes, 0x6, 0);
CHECK_ABS32(bytes, 0xC, 0);
CHECK_ABS32(bytes, 0x12, 45);
CHECK_ABS32(bytes, 0x16, 0);
CHECK_ABS32(bytes, 0x1A, 55);
CHECK_ABS64(bytes, 0x1E, 0);
CHECK_ABS64(bytes, 0x2B, 0);
CHECK_ABS32(bytes, 0x39, 73);
CHECK_ABS32(bytes, 0x44, 75);
}
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