| /* |
| * 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); |
| if (oat > End()) { |
| LOG(ERROR) << "In oat file " << GetLocation() << " found truncated OatHeader"; |
| return false; |
| } |
| |
| oat += GetOatHeader().GetImageFileLocationSize(); |
| if (oat > End()) { |
| LOG(ERROR) << "In oat file " << GetLocation() << " found truncated image file location: " |
| << reinterpret_cast<const void*>(Begin()) |
| << "+" << sizeof(OatHeader) |
| << "+" << GetOatHeader().GetImageFileLocationSize() |
| << "<=" << reinterpret_cast<const void*>(End()); |
| return false; |
| } |
| |
| for (size_t i = 0; i < GetOatHeader().GetDexFileCount(); i++) { |
| size_t dex_file_location_size = *reinterpret_cast<const uint32_t*>(oat); |
| if (dex_file_location_size == 0U) { |
| LOG(ERROR) << "In oat file " << GetLocation() << " found OatDexFile # " << i |
| << " with empty location name"; |
| return false; |
| } |
| oat += sizeof(dex_file_location_size); |
| if (oat > End()) { |
| LOG(ERROR) << "In oat file " << GetLocation() << " found OatDexFile # " << i |
| << " truncated after dex file location size"; |
| return false; |
| } |
| |
| const char* dex_file_location_data = reinterpret_cast<const char*>(oat); |
| oat += dex_file_location_size; |
| if (oat > End()) { |
| LOG(ERROR) << "In oat file " << GetLocation() << " found OatDexFile # " << i |
| << " with truncated dex file location"; |
| return false; |
| } |
| |
| 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); |
| if (oat > End()) { |
| LOG(ERROR) << "In oat file " << GetLocation() << " found OatDexFile # " << i |
| << " for "<< dex_file_location |
| << " truncated after dex file checksum"; |
| return false; |
| } |
| |
| uint32_t dex_file_offset = *reinterpret_cast<const uint32_t*>(oat); |
| if (dex_file_offset == 0U) { |
| LOG(ERROR) << "In oat file " << GetLocation() << " found OatDexFile # " << i |
| << " for "<< dex_file_location |
| << " with zero dex file offset"; |
| return false; |
| } |
| if (dex_file_offset > Size()) { |
| LOG(ERROR) << "In oat file " << GetLocation() << " found OatDexFile # " << i |
| << " for "<< dex_file_location |
| << " with dex file offset" << dex_file_offset << " > " << Size(); |
| return false; |
| } |
| oat += sizeof(dex_file_offset); |
| if (oat > End()) { |
| LOG(ERROR) << "In oat file " << GetLocation() << " found OatDexFile # " << i |
| << " for "<< dex_file_location |
| << " truncated after dex file offset"; |
| return false; |
| } |
| |
| const uint8_t* dex_file_pointer = Begin() + dex_file_offset; |
| if (!DexFile::IsMagicValid(dex_file_pointer)) { |
| LOG(ERROR) << "In oat file " << GetLocation() << " found OatDexFile # " << i |
| << " for "<< dex_file_location |
| << " with invalid dex file magic: " << dex_file_pointer; |
| return false; |
| } |
| if (!DexFile::IsVersionValid(dex_file_pointer)) { |
| LOG(ERROR) << "In oat file " << GetLocation() << " found OatDexFile # " << i |
| << " for "<< dex_file_location |
| << " with invalid dex file version: " << dex_file_pointer; |
| return false; |
| } |
| 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_); |
| if (oat > End()) { |
| LOG(ERROR) << "In oat file " << GetLocation() << " found OatDexFile # " << i |
| << " for "<< dex_file_location |
| << " with truncated method offsets"; |
| return false; |
| } |
| |
| 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()); // Used by native methods in work around JNI mode. |
| } |
| |
| } // namespace art |