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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 "oat_file.h"
#include <dlfcn.h>
#include "base/stl_util.h"
#include "base/unix_file/fd_file.h"
#include "elf_file.h"
#include "oat.h"
#include "mirror/class.h"
#include "mirror/abstract_method.h"
#include "mirror/abstract_method-inl.h"
#include "mirror/object-inl.h"
#include "os.h"
#include "utils.h"
namespace art {
std::string OatFile::DexFilenameToOdexFilename(const std::string& location) {
CHECK(IsValidDexFilename(location) || IsValidZipFilename(location));
std::string odex_location(location);
odex_location.resize(odex_location.size() - 3); // 3=dex or zip or apk
CHECK_EQ('.', odex_location[odex_location.size()-1]);
odex_location += "odex";
return odex_location;
}
void OatFile::CheckLocation(const std::string& location) {
CHECK(!location.empty());
if (!IsValidOatFilename(location)) {
LOG(WARNING) << "Attempting to open oat file with unknown extension '" << location << "'";
}
}
OatFile* OatFile::OpenMemory(std::vector<uint8_t>& oat_contents,
const std::string& location) {
CHECK(!oat_contents.empty()) << location;
CheckLocation(location);
UniquePtr<OatFile> oat_file(new OatFile(location));
oat_file->begin_ = &oat_contents[0];
oat_file->end_ = &oat_contents[oat_contents.size()];
return oat_file->Setup() ? oat_file.release() : NULL;
}
OatFile* OatFile::Open(const std::string& filename,
const std::string& location,
byte* requested_base,
bool executable) {
CHECK(!filename.empty()) << location;
CheckLocation(filename);
// If we are trying to execute, we need to use dlopen.
if (executable) {
return OpenDlopen(filename, location, requested_base);
}
// If we aren't trying to execute, we just use our own ElfFile loader for a couple reasons:
//
// On target, dlopen may fail when compiling due to selinux restrictions on installd.
//
// On host, dlopen is expected to fail when cross compiling, so fall back to OpenElfFile.
// This won't work for portable runtime execution because it doesn't process relocations.
UniquePtr<File> file(OS::OpenFile(filename.c_str(), false, false));
if (file.get() == NULL) {
return NULL;
}
return OpenElfFile(file.get(), location, requested_base, false, executable);
}
OatFile* OatFile::OpenWritable(File* file, const std::string& location) {
CheckLocation(location);
return OpenElfFile(file, location, NULL, true, false);
}
OatFile* OatFile::OpenDlopen(const std::string& elf_filename,
const std::string& location,
byte* requested_base) {
UniquePtr<OatFile> oat_file(new OatFile(location));
bool success = oat_file->Dlopen(elf_filename, requested_base);
if (!success) {
return NULL;
}
return oat_file.release();
}
OatFile* OatFile::OpenElfFile(File* file,
const std::string& location,
byte* requested_base,
bool writable,
bool executable) {
UniquePtr<OatFile> oat_file(new OatFile(location));
bool success = oat_file->ElfFileOpen(file, requested_base, writable, executable);
if (!success) {
return NULL;
}
return oat_file.release();
}
OatFile::OatFile(const std::string& location)
: location_(location), begin_(NULL), end_(NULL), dlopen_handle_(NULL) {
CHECK(!location_.empty());
}
OatFile::~OatFile() {
STLDeleteValues(&oat_dex_files_);
if (dlopen_handle_ != NULL) {
dlclose(dlopen_handle_);
}
}
bool OatFile::Dlopen(const std::string& elf_filename, byte* requested_base) {
char* absolute_path = realpath(elf_filename.c_str(), NULL);
if (absolute_path == NULL) {
return false;
}
dlopen_handle_ = dlopen(absolute_path, RTLD_NOW);
free(absolute_path);
if (dlopen_handle_ == NULL) {
return false;
}
begin_ = reinterpret_cast<byte*>(dlsym(dlopen_handle_, "oatdata"));
if (begin_ == NULL) {
LOG(WARNING) << "Failed to find oatdata symbol in " << elf_filename << ": " << dlerror();
return false;
}
if (requested_base != NULL && begin_ != requested_base) {
std::string maps;
ReadFileToString("/proc/self/maps", &maps);
LOG(WARNING) << "Failed to find oatdata symbol at expected address: oatdata="
<< reinterpret_cast<const void*>(begin_) << " != expected="
<< reinterpret_cast<const void*>(requested_base)
<< " /proc/self/maps:\n" << maps;
return false;
}
end_ = reinterpret_cast<byte*>(dlsym(dlopen_handle_, "oatlastword"));
if (end_ == NULL) {
LOG(WARNING) << "Failed to find oatlastword symbol in " << elf_filename << ": " << dlerror();
return false;
}
// Readjust to be non-inclusive upper bound.
end_ += sizeof(uint32_t);
return Setup();
}
bool OatFile::ElfFileOpen(File* file, byte* requested_base, bool writable, bool executable) {
elf_file_.reset(ElfFile::Open(file, writable, true));
if (elf_file_.get() == NULL) {
PLOG(WARNING) << "Failed to create ELF file for " << file->GetPath();
return false;
}
bool loaded = elf_file_->Load(executable);
if (!loaded) {
LOG(WARNING) << "Failed to load ELF file " << file->GetPath();
return false;
}
begin_ = elf_file_->FindDynamicSymbolAddress("oatdata");
if (begin_ == NULL) {
LOG(WARNING) << "Failed to find oatdata symbol in " << file->GetPath();
return false;
}
if (requested_base != NULL && begin_ != requested_base) {
std::string maps;
ReadFileToString("/proc/self/maps", &maps);
LOG(WARNING) << "Failed to find oatdata symbol at expected address: oatdata="
<< reinterpret_cast<const void*>(begin_) << " != expected="
<< reinterpret_cast<const void*>(requested_base)
<< " /proc/self/maps:\n" << maps;
return false;
}
end_ = elf_file_->FindDynamicSymbolAddress("oatlastword");
if (end_ == NULL) {
LOG(WARNING) << "Failed to find oatlastword symbol in " << file->GetPath();
return false;
}
// Readjust to be non-inclusive upper bound.
end_ += sizeof(uint32_t);
return Setup();
}
bool OatFile::Setup() {
if (!GetOatHeader().IsValid()) {
LOG(WARNING) << "Invalid oat magic for " << GetLocation();
return false;
}
const byte* oat = Begin();
oat += sizeof(OatHeader);
oat += GetOatHeader().GetImageFileLocationSize();
CHECK_LE(oat, End())
<< reinterpret_cast<const void*>(Begin())
<< "+" << sizeof(OatHeader)
<< "+" << GetOatHeader().GetImageFileLocationSize()
<< "<=" << reinterpret_cast<const void*>(End())
<< " " << GetLocation();
for (size_t i = 0; i < GetOatHeader().GetDexFileCount(); i++) {
size_t dex_file_location_size = *reinterpret_cast<const uint32_t*>(oat);
CHECK_GT(dex_file_location_size, 0U) << GetLocation();
oat += sizeof(dex_file_location_size);
CHECK_LT(oat, End()) << GetLocation();
const char* dex_file_location_data = reinterpret_cast<const char*>(oat);
oat += dex_file_location_size;
CHECK_LT(oat, End()) << GetLocation();
std::string dex_file_location(dex_file_location_data, dex_file_location_size);
uint32_t dex_file_checksum = *reinterpret_cast<const uint32_t*>(oat);
oat += sizeof(dex_file_checksum);
CHECK_LT(oat, End()) << GetLocation();
uint32_t dex_file_offset = *reinterpret_cast<const uint32_t*>(oat);
CHECK_GT(dex_file_offset, 0U) << GetLocation();
CHECK_LT(dex_file_offset, Size()) << GetLocation();
oat += sizeof(dex_file_offset);
CHECK_LT(oat, End()) << GetLocation();
const uint8_t* dex_file_pointer = Begin() + dex_file_offset;
CHECK(DexFile::IsMagicValid(dex_file_pointer))
<< GetLocation() << " " << dex_file_pointer;
CHECK(DexFile::IsVersionValid(dex_file_pointer))
<< GetLocation() << " " << dex_file_pointer;
const DexFile::Header* header = reinterpret_cast<const DexFile::Header*>(dex_file_pointer);
const uint32_t* methods_offsets_pointer = reinterpret_cast<const uint32_t*>(oat);
oat += (sizeof(*methods_offsets_pointer) * header->class_defs_size_);
CHECK_LE(oat, End()) << GetLocation();
oat_dex_files_.Put(dex_file_location, new OatDexFile(this,
dex_file_location,
dex_file_checksum,
dex_file_pointer,
methods_offsets_pointer));
}
return true;
}
const OatHeader& OatFile::GetOatHeader() const {
return *reinterpret_cast<const OatHeader*>(Begin());
}
const byte* OatFile::Begin() const {
CHECK(begin_ != NULL);
return begin_;
}
const byte* OatFile::End() const {
CHECK(end_ != NULL);
return end_;
}
const OatFile::OatDexFile* OatFile::GetOatDexFile(const std::string& dex_file_location,
bool warn_if_not_found) const {
Table::const_iterator it = oat_dex_files_.find(dex_file_location);
if (it == oat_dex_files_.end()) {
if (warn_if_not_found) {
LOG(WARNING) << "Failed to find OatDexFile for DexFile " << dex_file_location;
}
return NULL;
}
return it->second;
}
std::vector<const OatFile::OatDexFile*> OatFile::GetOatDexFiles() const {
std::vector<const OatFile::OatDexFile*> result;
for (Table::const_iterator it = oat_dex_files_.begin(); it != oat_dex_files_.end(); ++it) {
result.push_back(it->second);
}
return result;
}
OatFile::OatDexFile::OatDexFile(const OatFile* oat_file,
const std::string& dex_file_location,
uint32_t dex_file_location_checksum,
const byte* dex_file_pointer,
const uint32_t* oat_class_offsets_pointer)
: oat_file_(oat_file),
dex_file_location_(dex_file_location),
dex_file_location_checksum_(dex_file_location_checksum),
dex_file_pointer_(dex_file_pointer),
oat_class_offsets_pointer_(oat_class_offsets_pointer) {}
OatFile::OatDexFile::~OatDexFile() {}
size_t OatFile::OatDexFile::FileSize() const {
return reinterpret_cast<const DexFile::Header*>(dex_file_pointer_)->file_size_;
}
const DexFile* OatFile::OatDexFile::OpenDexFile() const {
return DexFile::Open(dex_file_pointer_, FileSize(), dex_file_location_,
dex_file_location_checksum_);
}
const OatFile::OatClass* OatFile::OatDexFile::GetOatClass(uint32_t class_def_index) const {
uint32_t oat_class_offset = oat_class_offsets_pointer_[class_def_index];
const byte* oat_class_pointer = oat_file_->Begin() + oat_class_offset;
CHECK_LT(oat_class_pointer, oat_file_->End());
mirror::Class::Status status = *reinterpret_cast<const mirror::Class::Status*>(oat_class_pointer);
const byte* methods_pointer = oat_class_pointer + sizeof(status);
CHECK_LT(methods_pointer, oat_file_->End());
return new OatClass(oat_file_,
status,
reinterpret_cast<const OatMethodOffsets*>(methods_pointer));
}
OatFile::OatClass::OatClass(const OatFile* oat_file,
mirror::Class::Status status,
const OatMethodOffsets* methods_pointer)
: oat_file_(oat_file), status_(status), methods_pointer_(methods_pointer) {}
OatFile::OatClass::~OatClass() {}
mirror::Class::Status OatFile::OatClass::GetStatus() const {
return status_;
}
const OatFile::OatMethod OatFile::OatClass::GetOatMethod(uint32_t method_index) const {
const OatMethodOffsets& oat_method_offsets = methods_pointer_[method_index];
return OatMethod(
oat_file_->Begin(),
oat_method_offsets.code_offset_,
oat_method_offsets.frame_size_in_bytes_,
oat_method_offsets.core_spill_mask_,
oat_method_offsets.fp_spill_mask_,
oat_method_offsets.mapping_table_offset_,
oat_method_offsets.vmap_table_offset_,
oat_method_offsets.gc_map_offset_);
}
OatFile::OatMethod::OatMethod(const byte* base,
const uint32_t code_offset,
const size_t frame_size_in_bytes,
const uint32_t core_spill_mask,
const uint32_t fp_spill_mask,
const uint32_t mapping_table_offset,
const uint32_t vmap_table_offset,
const uint32_t gc_map_offset)
: begin_(base),
code_offset_(code_offset),
frame_size_in_bytes_(frame_size_in_bytes),
core_spill_mask_(core_spill_mask),
fp_spill_mask_(fp_spill_mask),
mapping_table_offset_(mapping_table_offset),
vmap_table_offset_(vmap_table_offset),
native_gc_map_offset_(gc_map_offset) {
#ifndef NDEBUG
if (mapping_table_offset_ != 0) { // implies non-native, non-stub code
if (vmap_table_offset_ == 0) {
DCHECK_EQ(0U, static_cast<uint32_t>(__builtin_popcount(core_spill_mask_) + __builtin_popcount(fp_spill_mask_)));
} else {
const uint16_t* vmap_table_ = reinterpret_cast<const uint16_t*>(begin_ + vmap_table_offset_);
DCHECK_EQ(vmap_table_[0], static_cast<uint32_t>(__builtin_popcount(core_spill_mask_) + __builtin_popcount(fp_spill_mask_)));
}
} else {
DCHECK_EQ(vmap_table_offset_, 0U);
}
#endif
}
OatFile::OatMethod::~OatMethod() {}
const void* OatFile::OatMethod::GetCode() const {
return GetOatPointer<const void*>(code_offset_);
}
uint32_t OatFile::OatMethod::GetCodeSize() const {
#if defined(ART_USE_PORTABLE_COMPILER)
// TODO: With Quick, we store the size before the code. With
// Portable, the code is in a .o file we don't manage ourselves. ELF
// symbols do have a concept of size, so we could capture that and
// store it somewhere, such as the OatMethod.
return 0;
#else
uintptr_t code = reinterpret_cast<uint32_t>(GetCode());
if (code == 0) {
return 0;
}
// TODO: make this Thumb2 specific
code &= ~0x1;
return reinterpret_cast<uint32_t*>(code)[-1];
#endif
}
void OatFile::OatMethod::LinkMethod(mirror::AbstractMethod* method) const {
CHECK(method != NULL);
method->SetEntryPointFromCompiledCode(GetCode());
method->SetFrameSizeInBytes(frame_size_in_bytes_);
method->SetCoreSpillMask(core_spill_mask_);
method->SetFpSpillMask(fp_spill_mask_);
method->SetMappingTable(GetMappingTable());
method->SetVmapTable(GetVmapTable());
method->SetNativeGcMap(GetNativeGcMap()); // Note, used by native methods in work around JNI mode.
}
} // namespace art