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/*
* Copyright (C) 2011 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 <sys/mman.h> // For the PROT_NONE constant.
#include "base/file_utils.h"
#include "base/mem_map.h"
#include "base/unix_file/fd_file.h"
#include "base/utils.h"
#include "common_compiler_driver_test.h"
#include "elf/elf_builder.h"
#include "elf_file.h"
#include "elf_file_impl.h"
#include "elf_writer_quick.h"
#include "oat.h"
namespace art {
namespace linker {
class ElfWriterTest : public CommonCompilerDriverTest {
protected:
void SetUp() override {
ReserveImageSpace();
CommonCompilerTest::SetUp();
}
};
#define EXPECT_ELF_FILE_ADDRESS(ef, expected_value, symbol_name, build_map) \
do { \
void* addr = reinterpret_cast<void*>((ef)->FindSymbolAddress(SHT_DYNSYM, \
symbol_name, \
build_map)); \
EXPECT_NE(nullptr, addr); \
if ((expected_value) == nullptr) { \
(expected_value) = addr; \
} \
EXPECT_EQ(expected_value, addr); \
EXPECT_EQ(expected_value, (ef)->FindDynamicSymbolAddress(symbol_name)); \
} while (false)
TEST_F(ElfWriterTest, dlsym) {
std::string elf_location = GetCoreOatLocation();
std::string elf_filename = GetSystemImageFilename(elf_location.c_str(), kRuntimeISA);
LOG(INFO) << "elf_filename=" << elf_filename;
UnreserveImageSpace();
void* dl_oatdata = nullptr;
void* dl_oatexec = nullptr;
void* dl_oatlastword = nullptr;
std::unique_ptr<File> file(OS::OpenFileForReading(elf_filename.c_str()));
ASSERT_TRUE(file.get() != nullptr) << elf_filename;
{
std::string error_msg;
std::unique_ptr<ElfFile> ef(ElfFile::Open(file.get(),
/*writable=*/ false,
/*program_header_only=*/ false,
/*low_4gb=*/false,
&error_msg));
CHECK(ef.get() != nullptr) << error_msg;
EXPECT_ELF_FILE_ADDRESS(ef, dl_oatdata, "oatdata", false);
EXPECT_ELF_FILE_ADDRESS(ef, dl_oatexec, "oatexec", false);
EXPECT_ELF_FILE_ADDRESS(ef, dl_oatlastword, "oatlastword", false);
}
{
std::string error_msg;
std::unique_ptr<ElfFile> ef(ElfFile::Open(file.get(),
/*writable=*/ false,
/*program_header_only=*/ false,
/*low_4gb=*/ false,
&error_msg));
CHECK(ef.get() != nullptr) << error_msg;
EXPECT_ELF_FILE_ADDRESS(ef, dl_oatdata, "oatdata", true);
EXPECT_ELF_FILE_ADDRESS(ef, dl_oatexec, "oatexec", true);
EXPECT_ELF_FILE_ADDRESS(ef, dl_oatlastword, "oatlastword", true);
}
{
std::string error_msg;
std::unique_ptr<ElfFile> ef(ElfFile::Open(file.get(),
/*writable=*/ false,
/*program_header_only=*/ true,
/*low_4gb=*/ false,
&error_msg));
CHECK(ef.get() != nullptr) << error_msg;
size_t size;
bool success = ef->GetLoadedSize(&size, &error_msg);
CHECK(success) << error_msg;
MemMap reservation = MemMap::MapAnonymous("ElfWriterTest#dlsym reservation",
RoundUp(size, kPageSize),
PROT_NONE,
/*low_4gb=*/ true,
&error_msg);
CHECK(reservation.IsValid()) << error_msg;
uint8_t* base = reservation.Begin();
success =
ef->Load(file.get(), /*executable=*/ false, /*low_4gb=*/ false, &reservation, &error_msg);
CHECK(success) << error_msg;
CHECK(!reservation.IsValid());
EXPECT_EQ(reinterpret_cast<uintptr_t>(dl_oatdata) + reinterpret_cast<uintptr_t>(base),
reinterpret_cast<uintptr_t>(ef->FindDynamicSymbolAddress("oatdata")));
EXPECT_EQ(reinterpret_cast<uintptr_t>(dl_oatexec) + reinterpret_cast<uintptr_t>(base),
reinterpret_cast<uintptr_t>(ef->FindDynamicSymbolAddress("oatexec")));
EXPECT_EQ(reinterpret_cast<uintptr_t>(dl_oatlastword) + reinterpret_cast<uintptr_t>(base),
reinterpret_cast<uintptr_t>(ef->FindDynamicSymbolAddress("oatlastword")));
}
}
TEST_F(ElfWriterTest, CheckBuildIdPresent) {
std::string elf_location = GetCoreOatLocation();
std::string elf_filename = GetSystemImageFilename(elf_location.c_str(), kRuntimeISA);
LOG(INFO) << "elf_filename=" << elf_filename;
std::unique_ptr<File> file(OS::OpenFileForReading(elf_filename.c_str()));
ASSERT_TRUE(file.get() != nullptr);
{
std::string error_msg;
std::unique_ptr<ElfFile> ef(ElfFile::Open(file.get(),
/*writable=*/ false,
/*program_header_only=*/ false,
/*low_4gb=*/ false,
&error_msg));
CHECK(ef.get() != nullptr) << error_msg;
EXPECT_TRUE(ef->HasSection(".note.gnu.build-id"));
}
}
} // namespace linker
} // namespace art