blob: fcf07b02fcd526b520b119ced7d5bcebd69cb790 [file] [log] [blame]
/*
* 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 <sys/mman.h>
#include "file.h"
#include "os.h"
#include "stl_util.h"
namespace art {
std::string OatFile::DexFilenameToOatFilename(const std::string& location) {
CHECK(IsValidDexFilename(location) || IsValidZipFilename(location));
std::string oat_location(location);
oat_location += ".oat";
return oat_location;
}
OatFile* OatFile::Open(const std::string& filename,
const std::string& location,
byte* requested_base,
bool writable) {
CHECK(!location.empty()) << filename;
UniquePtr<File> file(OS::OpenFile(filename.c_str(), writable, false));
if (file.get() == NULL) {
return NULL;
}
return Open(*file.get(), location, requested_base, writable);
}
OatFile* OatFile::Open(File& file,
const std::string& location,
byte* requested_base,
bool writable) {
UniquePtr<OatFile> oat_file(new OatFile(location));
bool success = oat_file->Map(file, requested_base, writable);
if (!success) {
return NULL;
}
return oat_file.release();
}
OatFile::OatFile(const std::string& location) : location_(location) {
CHECK(!location_.empty());
}
OatFile::~OatFile() {
STLDeleteValues(&oat_dex_files_);
}
bool OatFile::Map(File& file, byte* requested_base, bool writable) {
OatHeader oat_header;
bool success = file.ReadFully(&oat_header, sizeof(oat_header));
if (!success || !oat_header.IsValid()) {
LOG(WARNING) << "Invalid oat header " << GetLocation();
return false;
}
int flags = 0;
int prot = 0;
if (writable) {
flags |= MAP_SHARED; // So changes will write through to file
prot |= (PROT_READ | PROT_WRITE);
} else {
flags |= MAP_PRIVATE;
prot |= PROT_READ;
}
if (requested_base != NULL) {
flags |= MAP_FIXED;
}
UniquePtr<MemMap> map(MemMap::MapFileAtAddress(requested_base,
file.Length(),
prot,
flags,
file.Fd(),
0));
if (map.get() == NULL) {
LOG(WARNING) << "Failed to map oat file " << GetLocation();
return false;
}
CHECK(requested_base == 0 || requested_base == map->Begin())
<< GetLocation() << " " << reinterpret_cast<void*>(map->Begin());
DCHECK_EQ(0, memcmp(&oat_header, map->Begin(), sizeof(OatHeader))) << GetLocation();
off_t code_offset = oat_header.GetExecutableOffset();
if (code_offset < file.Length()) {
byte* code_address = map->Begin() + code_offset;
size_t code_length = file.Length() - code_offset;
if (mprotect(code_address, code_length, prot | PROT_EXEC) != 0) {
PLOG(ERROR) << "Failed to make oat code executable in " << GetLocation();
return false;
}
} else {
// its possible to have no code if all the methods were abstract, native, etc
DCHECK_EQ(code_offset, RoundUp(file.Length(), kPageSize)) << GetLocation();
}
const byte* oat = map->Begin();
oat += sizeof(OatHeader);
oat += oat_header.GetImageFileLocationSize();
CHECK_LE(oat, map->End())
<< reinterpret_cast<void*>(map->Begin())
<< "+" << sizeof(OatHeader)
<< "+" << oat_header.GetImageFileLocationSize()
<< "<=" << reinterpret_cast<void*>(map->End())
<< " " << GetLocation();
for (size_t i = 0; i < oat_header.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, map->End()) << GetLocation();
const char* dex_file_location_data = reinterpret_cast<const char*>(oat);
oat += dex_file_location_size;
CHECK_LT(oat, map->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, map->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, static_cast<uint32_t>(file.Length())) << GetLocation();
oat += sizeof(dex_file_offset);
CHECK_LT(oat, map->End()) << GetLocation();
uint8_t* dex_file_pointer = map->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, map->End()) << GetLocation();
oat_dex_files_[dex_file_location] = new OatDexFile(this,
dex_file_location,
dex_file_checksum,
dex_file_pointer,
methods_offsets_pointer);
}
mem_map_.reset(map.release());
return true;
}
const OatHeader& OatFile::GetOatHeader() const {
return *reinterpret_cast<const OatHeader*>(Begin());
}
const byte* OatFile::Begin() const {
CHECK(mem_map_->Begin() != NULL);
return mem_map_->Begin();
}
const byte* OatFile::End() const {
CHECK(mem_map_->End() != NULL);
return mem_map_->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,
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() {}
const DexFile* OatFile::OatDexFile::OpenDexFile() const {
size_t length = reinterpret_cast<const DexFile::Header*>(dex_file_pointer_)->file_size_;
return DexFile::Open(dex_file_pointer_, length, 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());
Class::Status status = *reinterpret_cast<const 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,
Class::Status status,
const OatMethodOffsets* methods_pointer)
: oat_file_(oat_file), status_(status), methods_pointer_(methods_pointer) {}
OatFile::OatClass::~OatClass() {}
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_,
oat_method_offsets.invoke_stub_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,
const uint32_t invoke_stub_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),
gc_map_offset_(gc_map_offset),
invoke_stub_offset_(invoke_stub_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() {}
void OatFile::OatMethod::LinkMethodPointers(Method* method) const {
CHECK(method != NULL);
method->SetCode(GetCode());
method->SetFrameSizeInBytes(frame_size_in_bytes_);
method->SetCoreSpillMask(core_spill_mask_);
method->SetFpSpillMask(fp_spill_mask_);
method->SetMappingTable(GetMappingTable());
method->SetVmapTable(GetVmapTable());
method->SetGcMap(GetGcMap()); // Note, used by native methods in work around JNI mode.
method->SetInvokeStub(GetInvokeStub());
}
void OatFile::OatMethod::LinkMethodOffsets(Method* method) const {
CHECK(method != NULL);
method->SetOatCodeOffset(GetCodeOffset());
method->SetFrameSizeInBytes(GetFrameSizeInBytes());
method->SetCoreSpillMask(GetCoreSpillMask());
method->SetFpSpillMask(GetFpSpillMask());
method->SetOatMappingTableOffset(GetMappingTableOffset());
method->SetOatVmapTableOffset(GetVmapTableOffset());
method->SetOatGcMapOffset(GetGcMapOffset());
method->SetOatInvokeStubOffset(GetInvokeStubOffset());
}
} // namespace art