| /* |
| * 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 <string.h> |
| #include <unistd.h> |
| |
| #include <cstdlib> |
| #include <sstream> |
| |
| // dlopen_ext support from bionic. |
| #ifdef HAVE_ANDROID_OS |
| #include "android/dlext.h" |
| #endif |
| |
| #include "art_method-inl.h" |
| #include "base/bit_vector.h" |
| #include "base/stl_util.h" |
| #include "base/unix_file/fd_file.h" |
| #include "elf_file.h" |
| #include "elf_utils.h" |
| #include "oat.h" |
| #include "mirror/class.h" |
| #include "mirror/object-inl.h" |
| #include "os.h" |
| #include "runtime.h" |
| #include "utils.h" |
| #include "vmap_table.h" |
| |
| namespace art { |
| |
| // Whether OatFile::Open will try DlOpen() first. Fallback is our own ELF loader. |
| static constexpr bool kUseDlopen = false; |
| |
| // Whether OatFile::Open will try DlOpen() on the host. On the host we're not linking against |
| // bionic, so cannot take advantage of the support for changed semantics (loading the same soname |
| // multiple times). However, if/when we switch the above, we likely want to switch this, too, |
| // to get test coverage of the code paths. |
| static constexpr bool kUseDlopenOnHost = false; |
| |
| // For debugging, Open will print DlOpen error message if set to true. |
| static constexpr bool kPrintDlOpenErrorMessage = false; |
| |
| std::string OatFile::ResolveRelativeEncodedDexLocation( |
| const char* abs_dex_location, const std::string& rel_dex_location) { |
| if (abs_dex_location != nullptr && rel_dex_location[0] != '/') { |
| // Strip :classes<N>.dex used for secondary multidex files. |
| std::string base = DexFile::GetBaseLocation(rel_dex_location); |
| std::string multidex_suffix = DexFile::GetMultiDexSuffix(rel_dex_location); |
| |
| // Check if the base is a suffix of the provided abs_dex_location. |
| std::string target_suffix = "/" + base; |
| std::string abs_location(abs_dex_location); |
| if (abs_location.size() > target_suffix.size()) { |
| size_t pos = abs_location.size() - target_suffix.size(); |
| if (abs_location.compare(pos, std::string::npos, target_suffix) == 0) { |
| return abs_location + multidex_suffix; |
| } |
| } |
| } |
| return rel_dex_location; |
| } |
| |
| void OatFile::CheckLocation(const std::string& location) { |
| CHECK(!location.empty()); |
| } |
| |
| OatFile* OatFile::OpenWithElfFile(ElfFile* elf_file, |
| const std::string& location, |
| const char* abs_dex_location, |
| std::string* error_msg) { |
| std::unique_ptr<OatFile> oat_file(new OatFile(location, false)); |
| oat_file->elf_file_.reset(elf_file); |
| uint64_t offset, size; |
| bool has_section = elf_file->GetSectionOffsetAndSize(".rodata", &offset, &size); |
| CHECK(has_section); |
| oat_file->begin_ = elf_file->Begin() + offset; |
| oat_file->end_ = elf_file->Begin() + size + offset; |
| // Ignore the optional .bss section when opening non-executable. |
| return oat_file->Setup(abs_dex_location, error_msg) ? oat_file.release() : nullptr; |
| } |
| |
| OatFile* OatFile::Open(const std::string& filename, |
| const std::string& location, |
| uint8_t* requested_base, |
| uint8_t* oat_file_begin, |
| bool executable, |
| const char* abs_dex_location, |
| std::string* error_msg) { |
| CHECK(!filename.empty()) << location; |
| CheckLocation(location); |
| std::unique_ptr<OatFile> ret; |
| |
| // Use dlopen only when flagged to do so, and when it's OK to load things executable. |
| // TODO: Also try when not executable? The issue here could be re-mapping as writable (as |
| // !executable is a sign that we may want to patch), which may not be allowed for |
| // various reasons. |
| if (kUseDlopen && (kIsTargetBuild || kUseDlopenOnHost) && executable) { |
| // Try to use dlopen. This may fail for various reasons, outlined below. We try dlopen, as |
| // this will register the oat file with the linker and allows libunwind to find our info. |
| ret.reset(OpenDlopen(filename, location, requested_base, abs_dex_location, error_msg)); |
| if (ret.get() != nullptr) { |
| return ret.release(); |
| } |
| if (kPrintDlOpenErrorMessage) { |
| LOG(ERROR) << "Failed to dlopen: " << *error_msg; |
| } |
| } |
| |
| // 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. |
| // |
| // We use our own ELF loader for Quick to deal with legacy apps that |
| // open a generated dex file by name, remove the file, then open |
| // another generated dex file with the same name. http://b/10614658 |
| // |
| // On host, dlopen is expected to fail when cross compiling, so fall back to OpenElfFile. |
| // |
| // |
| // Another independent reason is the absolute placement of boot.oat. dlopen on the host usually |
| // does honor the virtual address encoded in the ELF file only for ET_EXEC files, not ET_DYN. |
| std::unique_ptr<File> file(OS::OpenFileForReading(filename.c_str())); |
| if (file == nullptr) { |
| *error_msg = StringPrintf("Failed to open oat filename for reading: %s", strerror(errno)); |
| return nullptr; |
| } |
| ret.reset(OpenElfFile(file.get(), location, requested_base, oat_file_begin, false, executable, |
| abs_dex_location, error_msg)); |
| |
| // It would be nice to unlink here. But we might have opened the file created by the |
| // ScopedLock, which we better not delete to avoid races. TODO: Investigate how to fix the API |
| // to allow removal when we know the ELF must be borked. |
| return ret.release(); |
| } |
| |
| OatFile* OatFile::OpenWritable(File* file, const std::string& location, |
| const char* abs_dex_location, |
| std::string* error_msg) { |
| CheckLocation(location); |
| return OpenElfFile(file, location, nullptr, nullptr, true, false, abs_dex_location, error_msg); |
| } |
| |
| OatFile* OatFile::OpenReadable(File* file, const std::string& location, |
| const char* abs_dex_location, |
| std::string* error_msg) { |
| CheckLocation(location); |
| return OpenElfFile(file, location, nullptr, nullptr, false, false, abs_dex_location, error_msg); |
| } |
| |
| OatFile* OatFile::OpenDlopen(const std::string& elf_filename, |
| const std::string& location, |
| uint8_t* requested_base, |
| const char* abs_dex_location, |
| std::string* error_msg) { |
| std::unique_ptr<OatFile> oat_file(new OatFile(location, true)); |
| bool success = oat_file->Dlopen(elf_filename, requested_base, abs_dex_location, error_msg); |
| if (!success) { |
| return nullptr; |
| } |
| return oat_file.release(); |
| } |
| |
| OatFile* OatFile::OpenElfFile(File* file, |
| const std::string& location, |
| uint8_t* requested_base, |
| uint8_t* oat_file_begin, |
| bool writable, |
| bool executable, |
| const char* abs_dex_location, |
| std::string* error_msg) { |
| std::unique_ptr<OatFile> oat_file(new OatFile(location, executable)); |
| bool success = oat_file->ElfFileOpen(file, requested_base, oat_file_begin, writable, executable, |
| abs_dex_location, error_msg); |
| if (!success) { |
| CHECK(!error_msg->empty()); |
| return nullptr; |
| } |
| return oat_file.release(); |
| } |
| |
| OatFile::OatFile(const std::string& location, bool is_executable) |
| : location_(location), begin_(nullptr), end_(nullptr), bss_begin_(nullptr), bss_end_(nullptr), |
| is_executable_(is_executable), dlopen_handle_(nullptr), |
| secondary_lookup_lock_("OatFile secondary lookup lock", kOatFileSecondaryLookupLock) { |
| CHECK(!location_.empty()); |
| } |
| |
| OatFile::~OatFile() { |
| STLDeleteElements(&oat_dex_files_storage_); |
| if (dlopen_handle_ != nullptr) { |
| dlclose(dlopen_handle_); |
| } |
| } |
| |
| bool OatFile::Dlopen(const std::string& elf_filename, uint8_t* requested_base, |
| const char* abs_dex_location, std::string* error_msg) { |
| std::unique_ptr<char> absolute_path(realpath(elf_filename.c_str(), nullptr)); |
| if (absolute_path == nullptr) { |
| *error_msg = StringPrintf("Failed to find absolute path for '%s'", elf_filename.c_str()); |
| return false; |
| } |
| #ifdef HAVE_ANDROID_OS |
| android_dlextinfo extinfo; |
| extinfo.flags = ANDROID_DLEXT_FORCE_LOAD; |
| dlopen_handle_ = android_dlopen_ext(absolute_path.get(), RTLD_NOW, &extinfo); |
| #else |
| dlopen_handle_ = dlopen(absolute_path.get(), RTLD_NOW); |
| #endif |
| if (dlopen_handle_ == nullptr) { |
| *error_msg = StringPrintf("Failed to dlopen '%s': %s", elf_filename.c_str(), dlerror()); |
| return false; |
| } |
| begin_ = reinterpret_cast<uint8_t*>(dlsym(dlopen_handle_, "oatdata")); |
| if (begin_ == nullptr) { |
| *error_msg = StringPrintf("Failed to find oatdata symbol in '%s': %s", elf_filename.c_str(), |
| dlerror()); |
| return false; |
| } |
| if (requested_base != nullptr && begin_ != requested_base) { |
| PrintFileToLog("/proc/self/maps", LogSeverity::WARNING); |
| *error_msg = StringPrintf("Failed to find oatdata symbol at expected address: " |
| "oatdata=%p != expected=%p, %s. See process maps in the log.", |
| begin_, requested_base, elf_filename.c_str()); |
| return false; |
| } |
| end_ = reinterpret_cast<uint8_t*>(dlsym(dlopen_handle_, "oatlastword")); |
| if (end_ == nullptr) { |
| *error_msg = StringPrintf("Failed to find oatlastword symbol in '%s': %s", elf_filename.c_str(), |
| dlerror()); |
| return false; |
| } |
| // Readjust to be non-inclusive upper bound. |
| end_ += sizeof(uint32_t); |
| |
| bss_begin_ = reinterpret_cast<uint8_t*>(dlsym(dlopen_handle_, "oatbss")); |
| if (bss_begin_ == nullptr) { |
| // No .bss section. Clear dlerror(). |
| bss_end_ = nullptr; |
| dlerror(); |
| } else { |
| bss_end_ = reinterpret_cast<uint8_t*>(dlsym(dlopen_handle_, "oatbsslastword")); |
| if (bss_end_ == nullptr) { |
| *error_msg = StringPrintf("Failed to find oatbasslastword symbol in '%s'", |
| elf_filename.c_str()); |
| return false; |
| } |
| // Readjust to be non-inclusive upper bound. |
| bss_end_ += sizeof(uint32_t); |
| } |
| |
| return Setup(abs_dex_location, error_msg); |
| } |
| |
| bool OatFile::ElfFileOpen(File* file, uint8_t* requested_base, uint8_t* oat_file_begin, |
| bool writable, bool executable, |
| const char* abs_dex_location, |
| std::string* error_msg) { |
| // TODO: rename requested_base to oat_data_begin |
| elf_file_.reset(ElfFile::Open(file, writable, /*program_header_only*/true, error_msg, |
| oat_file_begin)); |
| if (elf_file_ == nullptr) { |
| DCHECK(!error_msg->empty()); |
| return false; |
| } |
| bool loaded = elf_file_->Load(executable, error_msg); |
| if (!loaded) { |
| DCHECK(!error_msg->empty()); |
| return false; |
| } |
| begin_ = elf_file_->FindDynamicSymbolAddress("oatdata"); |
| if (begin_ == nullptr) { |
| *error_msg = StringPrintf("Failed to find oatdata symbol in '%s'", file->GetPath().c_str()); |
| return false; |
| } |
| if (requested_base != nullptr && begin_ != requested_base) { |
| PrintFileToLog("/proc/self/maps", LogSeverity::WARNING); |
| *error_msg = StringPrintf("Failed to find oatdata symbol at expected address: " |
| "oatdata=%p != expected=%p. See process maps in the log.", |
| begin_, requested_base); |
| return false; |
| } |
| end_ = elf_file_->FindDynamicSymbolAddress("oatlastword"); |
| if (end_ == nullptr) { |
| *error_msg = StringPrintf("Failed to find oatlastword symbol in '%s'", file->GetPath().c_str()); |
| return false; |
| } |
| // Readjust to be non-inclusive upper bound. |
| end_ += sizeof(uint32_t); |
| |
| bss_begin_ = elf_file_->FindDynamicSymbolAddress("oatbss"); |
| if (bss_begin_ == nullptr) { |
| // No .bss section. Clear dlerror(). |
| bss_end_ = nullptr; |
| dlerror(); |
| } else { |
| bss_end_ = elf_file_->FindDynamicSymbolAddress("oatbsslastword"); |
| if (bss_end_ == nullptr) { |
| *error_msg = StringPrintf("Failed to find oatbasslastword symbol in '%s'", |
| file->GetPath().c_str()); |
| return false; |
| } |
| // Readjust to be non-inclusive upper bound. |
| bss_end_ += sizeof(uint32_t); |
| } |
| |
| return Setup(abs_dex_location, error_msg); |
| } |
| |
| bool OatFile::Setup(const char* abs_dex_location, std::string* error_msg) { |
| if (!GetOatHeader().IsValid()) { |
| std::string cause = GetOatHeader().GetValidationErrorMessage(); |
| *error_msg = StringPrintf("Invalid oat header for '%s': %s", GetLocation().c_str(), |
| cause.c_str()); |
| return false; |
| } |
| const uint8_t* oat = Begin(); |
| oat += sizeof(OatHeader); |
| if (oat > End()) { |
| *error_msg = StringPrintf("In oat file '%s' found truncated OatHeader", GetLocation().c_str()); |
| return false; |
| } |
| |
| oat += GetOatHeader().GetKeyValueStoreSize(); |
| if (oat > End()) { |
| *error_msg = StringPrintf("In oat file '%s' found truncated variable-size data: " |
| "%p + %zd + %ud <= %p", GetLocation().c_str(), |
| Begin(), sizeof(OatHeader), GetOatHeader().GetKeyValueStoreSize(), |
| End()); |
| return false; |
| } |
| |
| uint32_t dex_file_count = GetOatHeader().GetDexFileCount(); |
| oat_dex_files_storage_.reserve(dex_file_count); |
| for (size_t i = 0; i < dex_file_count; i++) { |
| uint32_t dex_file_location_size = *reinterpret_cast<const uint32_t*>(oat); |
| if (UNLIKELY(dex_file_location_size == 0U)) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd with empty location name", |
| GetLocation().c_str(), i); |
| return false; |
| } |
| oat += sizeof(dex_file_location_size); |
| if (UNLIKELY(oat > End())) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd truncated after dex file " |
| "location size", GetLocation().c_str(), i); |
| return false; |
| } |
| |
| const char* dex_file_location_data = reinterpret_cast<const char*>(oat); |
| oat += dex_file_location_size; |
| if (UNLIKELY(oat > End())) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd with truncated dex file " |
| "location", GetLocation().c_str(), i); |
| return false; |
| } |
| |
| std::string dex_file_location = ResolveRelativeEncodedDexLocation( |
| abs_dex_location, |
| std::string(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 (UNLIKELY(oat > End())) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' truncated after " |
| "dex file checksum", GetLocation().c_str(), i, |
| dex_file_location.c_str()); |
| return false; |
| } |
| |
| uint32_t dex_file_offset = *reinterpret_cast<const uint32_t*>(oat); |
| if (UNLIKELY(dex_file_offset == 0U)) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with zero dex " |
| "file offset", GetLocation().c_str(), i, dex_file_location.c_str()); |
| return false; |
| } |
| if (UNLIKELY(dex_file_offset > Size())) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with dex file " |
| "offset %ud > %zd", GetLocation().c_str(), i, |
| dex_file_location.c_str(), dex_file_offset, Size()); |
| return false; |
| } |
| oat += sizeof(dex_file_offset); |
| if (UNLIKELY(oat > End())) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' truncated " |
| "after dex file offsets", GetLocation().c_str(), i, |
| dex_file_location.c_str()); |
| return false; |
| } |
| |
| const uint8_t* dex_file_pointer = Begin() + dex_file_offset; |
| if (UNLIKELY(!DexFile::IsMagicValid(dex_file_pointer))) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with invalid " |
| "dex file magic '%s'", GetLocation().c_str(), i, |
| dex_file_location.c_str(), dex_file_pointer); |
| return false; |
| } |
| if (UNLIKELY(!DexFile::IsVersionValid(dex_file_pointer))) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with invalid " |
| "dex file version '%s'", GetLocation().c_str(), i, |
| dex_file_location.c_str(), 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 (UNLIKELY(oat > End())) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with truncated " |
| "method offsets", GetLocation().c_str(), i, |
| dex_file_location.c_str()); |
| return false; |
| } |
| |
| std::string canonical_location = DexFile::GetDexCanonicalLocation(dex_file_location.c_str()); |
| |
| // Create the OatDexFile and add it to the owning container. |
| OatDexFile* oat_dex_file = new OatDexFile(this, |
| dex_file_location, |
| canonical_location, |
| dex_file_checksum, |
| dex_file_pointer, |
| methods_offsets_pointer); |
| oat_dex_files_storage_.push_back(oat_dex_file); |
| |
| // Add the location and canonical location (if different) to the oat_dex_files_ table. |
| StringPiece key(oat_dex_file->GetDexFileLocation()); |
| oat_dex_files_.Put(key, oat_dex_file); |
| if (canonical_location != dex_file_location) { |
| StringPiece canonical_key(oat_dex_file->GetCanonicalDexFileLocation()); |
| oat_dex_files_.Put(canonical_key, oat_dex_file); |
| } |
| } |
| return true; |
| } |
| |
| const OatHeader& OatFile::GetOatHeader() const { |
| return *reinterpret_cast<const OatHeader*>(Begin()); |
| } |
| |
| const uint8_t* OatFile::Begin() const { |
| CHECK(begin_ != nullptr); |
| return begin_; |
| } |
| |
| const uint8_t* OatFile::End() const { |
| CHECK(end_ != nullptr); |
| return end_; |
| } |
| |
| const uint8_t* OatFile::BssBegin() const { |
| return bss_begin_; |
| } |
| |
| const uint8_t* OatFile::BssEnd() const { |
| return bss_end_; |
| } |
| |
| const OatFile::OatDexFile* OatFile::GetOatDexFile(const char* dex_location, |
| const uint32_t* dex_location_checksum, |
| bool warn_if_not_found) const { |
| // NOTE: We assume here that the canonical location for a given dex_location never |
| // changes. If it does (i.e. some symlink used by the filename changes) we may return |
| // an incorrect OatDexFile. As long as we have a checksum to check, we shall return |
| // an identical file or fail; otherwise we may see some unpredictable failures. |
| |
| // TODO: Additional analysis of usage patterns to see if this can be simplified |
| // without any performance loss, for example by not doing the first lock-free lookup. |
| |
| const OatFile::OatDexFile* oat_dex_file = nullptr; |
| StringPiece key(dex_location); |
| // Try to find the key cheaply in the oat_dex_files_ map which holds dex locations |
| // directly mentioned in the oat file and doesn't require locking. |
| auto primary_it = oat_dex_files_.find(key); |
| if (primary_it != oat_dex_files_.end()) { |
| oat_dex_file = primary_it->second; |
| DCHECK(oat_dex_file != nullptr); |
| } else { |
| // This dex_location is not one of the dex locations directly mentioned in the |
| // oat file. The correct lookup is via the canonical location but first see in |
| // the secondary_oat_dex_files_ whether we've looked up this location before. |
| MutexLock mu(Thread::Current(), secondary_lookup_lock_); |
| auto secondary_lb = secondary_oat_dex_files_.lower_bound(key); |
| if (secondary_lb != secondary_oat_dex_files_.end() && key == secondary_lb->first) { |
| oat_dex_file = secondary_lb->second; // May be null. |
| } else { |
| // We haven't seen this dex_location before, we must check the canonical location. |
| std::string dex_canonical_location = DexFile::GetDexCanonicalLocation(dex_location); |
| if (dex_canonical_location != dex_location) { |
| StringPiece canonical_key(dex_canonical_location); |
| auto canonical_it = oat_dex_files_.find(canonical_key); |
| if (canonical_it != oat_dex_files_.end()) { |
| oat_dex_file = canonical_it->second; |
| } // else keep null. |
| } // else keep null. |
| |
| // Copy the key to the string_cache_ and store the result in secondary map. |
| string_cache_.emplace_back(key.data(), key.length()); |
| StringPiece key_copy(string_cache_.back()); |
| secondary_oat_dex_files_.PutBefore(secondary_lb, key_copy, oat_dex_file); |
| } |
| } |
| if (oat_dex_file != nullptr && |
| (dex_location_checksum == nullptr || |
| oat_dex_file->GetDexFileLocationChecksum() == *dex_location_checksum)) { |
| return oat_dex_file; |
| } |
| |
| if (warn_if_not_found) { |
| std::string dex_canonical_location = DexFile::GetDexCanonicalLocation(dex_location); |
| std::string checksum("<unspecified>"); |
| if (dex_location_checksum != nullptr) { |
| checksum = StringPrintf("0x%08x", *dex_location_checksum); |
| } |
| LOG(WARNING) << "Failed to find OatDexFile for DexFile " << dex_location |
| << " ( canonical path " << dex_canonical_location << ")" |
| << " with checksum " << checksum << " in OatFile " << GetLocation(); |
| if (kIsDebugBuild) { |
| for (const OatDexFile* odf : oat_dex_files_storage_) { |
| LOG(WARNING) << "OatFile " << GetLocation() |
| << " contains OatDexFile " << odf->GetDexFileLocation() |
| << " (canonical path " << odf->GetCanonicalDexFileLocation() << ")" |
| << " with checksum 0x" << std::hex << odf->GetDexFileLocationChecksum(); |
| } |
| } |
| } |
| |
| return nullptr; |
| } |
| |
| OatFile::OatDexFile::OatDexFile(const OatFile* oat_file, |
| const std::string& dex_file_location, |
| const std::string& canonical_dex_file_location, |
| uint32_t dex_file_location_checksum, |
| const uint8_t* dex_file_pointer, |
| const uint32_t* oat_class_offsets_pointer) |
| : oat_file_(oat_file), |
| dex_file_location_(dex_file_location), |
| canonical_dex_file_location_(canonical_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_; |
| } |
| |
| std::unique_ptr<const DexFile> OatFile::OatDexFile::OpenDexFile(std::string* error_msg) const { |
| return DexFile::Open(dex_file_pointer_, FileSize(), dex_file_location_, |
| dex_file_location_checksum_, this, error_msg); |
| } |
| |
| uint32_t OatFile::OatDexFile::GetOatClassOffset(uint16_t class_def_index) const { |
| return oat_class_offsets_pointer_[class_def_index]; |
| } |
| |
| OatFile::OatClass OatFile::OatDexFile::GetOatClass(uint16_t class_def_index) const { |
| uint32_t oat_class_offset = GetOatClassOffset(class_def_index); |
| |
| const uint8_t* oat_class_pointer = oat_file_->Begin() + oat_class_offset; |
| CHECK_LT(oat_class_pointer, oat_file_->End()) << oat_file_->GetLocation(); |
| |
| const uint8_t* status_pointer = oat_class_pointer; |
| CHECK_LT(status_pointer, oat_file_->End()) << oat_file_->GetLocation(); |
| mirror::Class::Status status = |
| static_cast<mirror::Class::Status>(*reinterpret_cast<const int16_t*>(status_pointer)); |
| CHECK_LT(status, mirror::Class::kStatusMax); |
| |
| const uint8_t* type_pointer = status_pointer + sizeof(uint16_t); |
| CHECK_LT(type_pointer, oat_file_->End()) << oat_file_->GetLocation(); |
| OatClassType type = static_cast<OatClassType>(*reinterpret_cast<const uint16_t*>(type_pointer)); |
| CHECK_LT(type, kOatClassMax); |
| |
| const uint8_t* after_type_pointer = type_pointer + sizeof(int16_t); |
| CHECK_LE(after_type_pointer, oat_file_->End()) << oat_file_->GetLocation(); |
| |
| uint32_t bitmap_size = 0; |
| const uint8_t* bitmap_pointer = nullptr; |
| const uint8_t* methods_pointer = nullptr; |
| if (type != kOatClassNoneCompiled) { |
| if (type == kOatClassSomeCompiled) { |
| bitmap_size = static_cast<uint32_t>(*reinterpret_cast<const uint32_t*>(after_type_pointer)); |
| bitmap_pointer = after_type_pointer + sizeof(bitmap_size); |
| CHECK_LE(bitmap_pointer, oat_file_->End()) << oat_file_->GetLocation(); |
| methods_pointer = bitmap_pointer + bitmap_size; |
| } else { |
| methods_pointer = after_type_pointer; |
| } |
| CHECK_LE(methods_pointer, oat_file_->End()) << oat_file_->GetLocation(); |
| } |
| |
| return OatFile::OatClass(oat_file_, |
| status, |
| type, |
| bitmap_size, |
| reinterpret_cast<const uint32_t*>(bitmap_pointer), |
| reinterpret_cast<const OatMethodOffsets*>(methods_pointer)); |
| } |
| |
| OatFile::OatClass::OatClass(const OatFile* oat_file, |
| mirror::Class::Status status, |
| OatClassType type, |
| uint32_t bitmap_size, |
| const uint32_t* bitmap_pointer, |
| const OatMethodOffsets* methods_pointer) |
| : oat_file_(oat_file), status_(status), type_(type), |
| bitmap_(bitmap_pointer), methods_pointer_(methods_pointer) { |
| switch (type_) { |
| case kOatClassAllCompiled: { |
| CHECK_EQ(0U, bitmap_size); |
| CHECK(bitmap_pointer == nullptr); |
| CHECK(methods_pointer != nullptr); |
| break; |
| } |
| case kOatClassSomeCompiled: { |
| CHECK_NE(0U, bitmap_size); |
| CHECK(bitmap_pointer != nullptr); |
| CHECK(methods_pointer != nullptr); |
| break; |
| } |
| case kOatClassNoneCompiled: { |
| CHECK_EQ(0U, bitmap_size); |
| CHECK(bitmap_pointer == nullptr); |
| CHECK(methods_pointer_ == nullptr); |
| break; |
| } |
| case kOatClassMax: { |
| LOG(FATAL) << "Invalid OatClassType " << type_; |
| break; |
| } |
| } |
| } |
| |
| uint32_t OatFile::OatClass::GetOatMethodOffsetsOffset(uint32_t method_index) const { |
| const OatMethodOffsets* oat_method_offsets = GetOatMethodOffsets(method_index); |
| if (oat_method_offsets == nullptr) { |
| return 0u; |
| } |
| return reinterpret_cast<const uint8_t*>(oat_method_offsets) - oat_file_->Begin(); |
| } |
| |
| const OatMethodOffsets* OatFile::OatClass::GetOatMethodOffsets(uint32_t method_index) const { |
| // NOTE: We don't keep the number of methods and cannot do a bounds check for method_index. |
| if (methods_pointer_ == nullptr) { |
| CHECK_EQ(kOatClassNoneCompiled, type_); |
| return nullptr; |
| } |
| size_t methods_pointer_index; |
| if (bitmap_ == nullptr) { |
| CHECK_EQ(kOatClassAllCompiled, type_); |
| methods_pointer_index = method_index; |
| } else { |
| CHECK_EQ(kOatClassSomeCompiled, type_); |
| if (!BitVector::IsBitSet(bitmap_, method_index)) { |
| return nullptr; |
| } |
| size_t num_set_bits = BitVector::NumSetBits(bitmap_, method_index); |
| methods_pointer_index = num_set_bits; |
| } |
| const OatMethodOffsets& oat_method_offsets = methods_pointer_[methods_pointer_index]; |
| return &oat_method_offsets; |
| } |
| |
| const OatFile::OatMethod OatFile::OatClass::GetOatMethod(uint32_t method_index) const { |
| const OatMethodOffsets* oat_method_offsets = GetOatMethodOffsets(method_index); |
| if (oat_method_offsets == nullptr) { |
| return OatMethod(nullptr, 0); |
| } |
| if (oat_file_->IsExecutable() || |
| Runtime::Current() == nullptr || // This case applies for oatdump. |
| Runtime::Current()->IsAotCompiler()) { |
| return OatMethod(oat_file_->Begin(), oat_method_offsets->code_offset_); |
| } |
| // We aren't allowed to use the compiled code. We just force it down the interpreted / jit |
| // version. |
| return OatMethod(oat_file_->Begin(), 0); |
| } |
| |
| void OatFile::OatMethod::LinkMethod(ArtMethod* method) const { |
| CHECK(method != nullptr); |
| method->SetEntryPointFromQuickCompiledCode(GetQuickCode()); |
| } |
| |
| bool OatFile::IsPic() const { |
| return GetOatHeader().IsPic(); |
| // TODO: Check against oat_patches. b/18144996 |
| } |
| |
| bool OatFile::IsDebuggable() const { |
| return GetOatHeader().IsDebuggable(); |
| } |
| |
| static constexpr char kDexClassPathEncodingSeparator = '*'; |
| |
| std::string OatFile::EncodeDexFileDependencies(const std::vector<const DexFile*>& dex_files) { |
| std::ostringstream out; |
| |
| for (const DexFile* dex_file : dex_files) { |
| out << dex_file->GetLocation().c_str(); |
| out << kDexClassPathEncodingSeparator; |
| out << dex_file->GetLocationChecksum(); |
| out << kDexClassPathEncodingSeparator; |
| } |
| |
| return out.str(); |
| } |
| |
| bool OatFile::CheckStaticDexFileDependencies(const char* dex_dependencies, std::string* msg) { |
| if (dex_dependencies == nullptr || dex_dependencies[0] == 0) { |
| // No dependencies. |
| return true; |
| } |
| |
| // Assumption: this is not performance-critical. So it's OK to do this with a std::string and |
| // Split() instead of manual parsing of the combined char*. |
| std::vector<std::string> split; |
| Split(dex_dependencies, kDexClassPathEncodingSeparator, &split); |
| if (split.size() % 2 != 0) { |
| // Expected pairs of location and checksum. |
| *msg = StringPrintf("Odd number of elements in dependency list %s", dex_dependencies); |
| return false; |
| } |
| |
| for (auto it = split.begin(), end = split.end(); it != end; it += 2) { |
| std::string& location = *it; |
| std::string& checksum = *(it + 1); |
| int64_t converted = strtoll(checksum.c_str(), nullptr, 10); |
| if (converted == 0) { |
| // Conversion error. |
| *msg = StringPrintf("Conversion error for %s", checksum.c_str()); |
| return false; |
| } |
| |
| uint32_t dex_checksum; |
| std::string error_msg; |
| if (DexFile::GetChecksum(DexFile::GetDexCanonicalLocation(location.c_str()).c_str(), |
| &dex_checksum, |
| &error_msg)) { |
| if (converted != dex_checksum) { |
| *msg = StringPrintf("Checksums don't match for %s: %" PRId64 " vs %u", |
| location.c_str(), converted, dex_checksum); |
| return false; |
| } |
| } else { |
| // Problem retrieving checksum. |
| // TODO: odex files? |
| *msg = StringPrintf("Could not retrieve checksum for %s: %s", location.c_str(), |
| error_msg.c_str()); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| bool OatFile::GetDexLocationsFromDependencies(const char* dex_dependencies, |
| std::vector<std::string>* locations) { |
| DCHECK(locations != nullptr); |
| if (dex_dependencies == nullptr || dex_dependencies[0] == 0) { |
| return true; |
| } |
| |
| // Assumption: this is not performance-critical. So it's OK to do this with a std::string and |
| // Split() instead of manual parsing of the combined char*. |
| std::vector<std::string> split; |
| Split(dex_dependencies, kDexClassPathEncodingSeparator, &split); |
| if (split.size() % 2 != 0) { |
| // Expected pairs of location and checksum. |
| return false; |
| } |
| |
| for (auto it = split.begin(), end = split.end(); it != end; it += 2) { |
| locations->push_back(*it); |
| } |
| |
| return true; |
| } |
| |
| } // namespace art |
