| /* |
| * 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 <type_traits> |
| #include <unistd.h> |
| |
| #include <cstdlib> |
| #ifndef __APPLE__ |
| #include <link.h> // for dl_iterate_phdr. |
| #endif |
| #include <sstream> |
| |
| // dlopen_ext support from bionic. |
| #ifdef ART_TARGET_ANDROID |
| #include "android/dlext.h" |
| #endif |
| |
| #include "art_method-inl.h" |
| #include "base/bit_vector.h" |
| #include "base/stl_util.h" |
| #include "base/systrace.h" |
| #include "base/unix_file/fd_file.h" |
| #include "elf_file.h" |
| #include "elf_utils.h" |
| #include "oat.h" |
| #include "mem_map.h" |
| #include "mirror/class.h" |
| #include "mirror/object-inl.h" |
| #include "oat_file-inl.h" |
| #include "oat_file_manager.h" |
| #include "os.h" |
| #include "runtime.h" |
| #include "type_lookup_table.h" |
| #include "utils.h" |
| #include "utils/dex_cache_arrays_layout-inl.h" |
| |
| namespace art { |
| |
| // Whether OatFile::Open will try dlopen. Fallback is our own ELF loader. |
| static constexpr bool kUseDlopen = true; |
| |
| // 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 = true; |
| |
| // For debugging, Open will print DlOpen error message if set to true. |
| static constexpr bool kPrintDlOpenErrorMessage = false; |
| |
| // Note for OatFileBase and descendents: |
| // |
| // These are used in OatFile::Open to try all our loaders. |
| // |
| // The process is simple: |
| // |
| // 1) Allocate an instance through the standard constructor (location, executable) |
| // 2) Load() to try to open the file. |
| // 3) ComputeFields() to populate the OatFile fields like begin_, using FindDynamicSymbolAddress. |
| // 4) PreSetup() for any steps that should be done before the final setup. |
| // 5) Setup() to complete the procedure. |
| |
| class OatFileBase : public OatFile { |
| public: |
| virtual ~OatFileBase() {} |
| |
| template <typename kOatFileBaseSubType> |
| static OatFileBase* OpenOatFile(const std::string& elf_filename, |
| const std::string& location, |
| uint8_t* requested_base, |
| uint8_t* oat_file_begin, |
| bool writable, |
| bool executable, |
| bool low_4gb, |
| const char* abs_dex_location, |
| std::string* error_msg); |
| |
| protected: |
| OatFileBase(const std::string& filename, bool executable) : OatFile(filename, executable) {} |
| |
| virtual const uint8_t* FindDynamicSymbolAddress(const std::string& symbol_name, |
| std::string* error_msg) const = 0; |
| |
| virtual void PreLoad() = 0; |
| |
| virtual bool Load(const std::string& elf_filename, |
| uint8_t* oat_file_begin, |
| bool writable, |
| bool executable, |
| bool low_4gb, |
| std::string* error_msg) = 0; |
| |
| bool ComputeFields(uint8_t* requested_base, |
| const std::string& file_path, |
| std::string* error_msg); |
| |
| virtual void PreSetup(const std::string& elf_filename) = 0; |
| |
| bool Setup(const char* abs_dex_location, std::string* error_msg); |
| |
| // Setters exposed for ElfOatFile. |
| |
| void SetBegin(const uint8_t* begin) { |
| begin_ = begin; |
| } |
| |
| void SetEnd(const uint8_t* end) { |
| end_ = end; |
| } |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(OatFileBase); |
| }; |
| |
| template <typename kOatFileBaseSubType> |
| OatFileBase* OatFileBase::OpenOatFile(const std::string& elf_filename, |
| const std::string& location, |
| uint8_t* requested_base, |
| uint8_t* oat_file_begin, |
| bool writable, |
| bool executable, |
| bool low_4gb, |
| const char* abs_dex_location, |
| std::string* error_msg) { |
| std::unique_ptr<OatFileBase> ret(new kOatFileBaseSubType(location, executable)); |
| |
| ret->PreLoad(); |
| |
| if (!ret->Load(elf_filename, |
| oat_file_begin, |
| writable, |
| executable, |
| low_4gb, |
| error_msg)) { |
| return nullptr; |
| } |
| |
| if (!ret->ComputeFields(requested_base, elf_filename, error_msg)) { |
| return nullptr; |
| } |
| |
| ret->PreSetup(elf_filename); |
| |
| if (!ret->Setup(abs_dex_location, error_msg)) { |
| return nullptr; |
| } |
| |
| return ret.release(); |
| } |
| |
| bool OatFileBase::ComputeFields(uint8_t* requested_base, |
| const std::string& file_path, |
| std::string* error_msg) { |
| std::string symbol_error_msg; |
| begin_ = FindDynamicSymbolAddress("oatdata", &symbol_error_msg); |
| if (begin_ == nullptr) { |
| *error_msg = StringPrintf("Failed to find oatdata symbol in '%s' %s", |
| file_path.c_str(), |
| symbol_error_msg.c_str()); |
| return false; |
| } |
| if (requested_base != nullptr && begin_ != requested_base) { |
| // Host can fail this check. Do not dump there to avoid polluting the output. |
| if (kIsTargetBuild && (kIsDebugBuild || VLOG_IS_ON(oat))) { |
| 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_ = FindDynamicSymbolAddress("oatlastword", &symbol_error_msg); |
| if (end_ == nullptr) { |
| *error_msg = StringPrintf("Failed to find oatlastword symbol in '%s' %s", |
| file_path.c_str(), |
| symbol_error_msg.c_str()); |
| return false; |
| } |
| // Readjust to be non-inclusive upper bound. |
| end_ += sizeof(uint32_t); |
| |
| bss_begin_ = const_cast<uint8_t*>(FindDynamicSymbolAddress("oatbss", &symbol_error_msg)); |
| if (bss_begin_ == nullptr) { |
| // No .bss section. |
| bss_end_ = nullptr; |
| } else { |
| bss_end_ = const_cast<uint8_t*>(FindDynamicSymbolAddress("oatbsslastword", &symbol_error_msg)); |
| if (bss_end_ == nullptr) { |
| *error_msg = StringPrintf("Failed to find oatbasslastword symbol in '%s'", file_path.c_str()); |
| return false; |
| } |
| // Readjust to be non-inclusive upper bound. |
| bss_end_ += sizeof(uint32_t); |
| } |
| |
| return true; |
| } |
| |
| // Read an unaligned entry from the OatDexFile data in OatFile and advance the read |
| // position by the number of bytes read, i.e. sizeof(T). |
| // Return true on success, false if the read would go beyond the end of the OatFile. |
| template <typename T> |
| inline static bool ReadOatDexFileData(const OatFile& oat_file, |
| /*inout*/const uint8_t** oat, |
| /*out*/T* value) { |
| DCHECK(oat != nullptr); |
| DCHECK(value != nullptr); |
| DCHECK_LE(*oat, oat_file.End()); |
| if (UNLIKELY(static_cast<size_t>(oat_file.End() - *oat) < sizeof(T))) { |
| return false; |
| } |
| static_assert(std::is_trivial<T>::value, "T must be a trivial type"); |
| typedef __attribute__((__aligned__(1))) T unaligned_type; |
| *value = *reinterpret_cast<const unaligned_type*>(*oat); |
| *oat += sizeof(T); |
| return true; |
| } |
| |
| bool OatFileBase::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 + %zu + %u <= %p", |
| GetLocation().c_str(), |
| Begin(), |
| sizeof(OatHeader), |
| GetOatHeader().GetKeyValueStoreSize(), |
| End()); |
| return false; |
| } |
| |
| size_t pointer_size = GetInstructionSetPointerSize(GetOatHeader().GetInstructionSet()); |
| uint8_t* dex_cache_arrays = bss_begin_; |
| 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; |
| if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &dex_file_location_size))) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu truncated after dex file " |
| "location size", |
| GetLocation().c_str(), |
| i); |
| return false; |
| } |
| if (UNLIKELY(dex_file_location_size == 0U)) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu with empty location name", |
| GetLocation().c_str(), |
| i); |
| return false; |
| } |
| if (UNLIKELY(static_cast<size_t>(End() - oat) < dex_file_location_size)) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu with truncated dex file " |
| "location", |
| GetLocation().c_str(), |
| i); |
| return false; |
| } |
| const char* dex_file_location_data = reinterpret_cast<const char*>(oat); |
| oat += dex_file_location_size; |
| |
| std::string dex_file_location = ResolveRelativeEncodedDexLocation( |
| abs_dex_location, |
| std::string(dex_file_location_data, dex_file_location_size)); |
| |
| uint32_t dex_file_checksum; |
| if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &dex_file_checksum))) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' truncated after " |
| "dex file checksum", |
| GetLocation().c_str(), |
| i, |
| dex_file_location.c_str()); |
| return false; |
| } |
| |
| uint32_t dex_file_offset; |
| if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &dex_file_offset))) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' truncated " |
| "after dex file offsets", |
| GetLocation().c_str(), |
| i, |
| dex_file_location.c_str()); |
| return false; |
| } |
| if (UNLIKELY(dex_file_offset == 0U)) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu 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 #%zu for '%s' with dex file " |
| "offset %u > %zu", |
| GetLocation().c_str(), |
| i, |
| dex_file_location.c_str(), |
| dex_file_offset, |
| Size()); |
| return false; |
| } |
| if (UNLIKELY(Size() - dex_file_offset < sizeof(DexFile::Header))) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with dex file " |
| "offset %u of %zu but the size of dex file header is %zu", |
| GetLocation().c_str(), |
| i, |
| dex_file_location.c_str(), |
| dex_file_offset, |
| Size(), |
| sizeof(DexFile::Header)); |
| 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 #%zu 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 #%zu 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); |
| if (Size() - dex_file_offset < header->file_size_) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with dex file " |
| "offset %u and size %u truncated at %zu", |
| GetLocation().c_str(), |
| i, |
| dex_file_location.c_str(), |
| dex_file_offset, |
| header->file_size_, |
| Size()); |
| return false; |
| } |
| |
| uint32_t class_offsets_offset; |
| if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &class_offsets_offset))) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' truncated " |
| "after class offsets offset", |
| GetLocation().c_str(), |
| i, |
| dex_file_location.c_str()); |
| return false; |
| } |
| if (UNLIKELY(class_offsets_offset > Size()) || |
| UNLIKELY((Size() - class_offsets_offset) / sizeof(uint32_t) < header->class_defs_size_)) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with truncated " |
| "class offsets, offset %u of %zu, class defs %u", |
| GetLocation().c_str(), |
| i, |
| dex_file_location.c_str(), |
| class_offsets_offset, |
| Size(), |
| header->class_defs_size_); |
| return false; |
| } |
| if (UNLIKELY(!IsAligned<alignof(uint32_t)>(class_offsets_offset))) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with unaligned " |
| "class offsets, offset %u", |
| GetLocation().c_str(), |
| i, |
| dex_file_location.c_str(), |
| class_offsets_offset); |
| return false; |
| } |
| const uint32_t* class_offsets_pointer = |
| reinterpret_cast<const uint32_t*>(Begin() + class_offsets_offset); |
| |
| uint32_t lookup_table_offset; |
| if (UNLIKELY(!ReadOatDexFileData(*this, &oat, &lookup_table_offset))) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' truncated " |
| "after lookup table offset", |
| GetLocation().c_str(), |
| i, |
| dex_file_location.c_str()); |
| return false; |
| } |
| const uint8_t* lookup_table_data = lookup_table_offset != 0u |
| ? Begin() + lookup_table_offset |
| : nullptr; |
| if (lookup_table_offset != 0u && |
| (UNLIKELY(lookup_table_offset > Size()) || |
| UNLIKELY(Size() - lookup_table_offset < |
| TypeLookupTable::RawDataLength(header->class_defs_size_)))) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with truncated " |
| "type lookup table, offset %u of %zu, class defs %u", |
| GetLocation().c_str(), |
| i, |
| dex_file_location.c_str(), |
| lookup_table_offset, |
| Size(), |
| header->class_defs_size_); |
| return false; |
| } |
| |
| uint8_t* current_dex_cache_arrays = nullptr; |
| if (dex_cache_arrays != nullptr) { |
| DexCacheArraysLayout layout(pointer_size, *header); |
| if (layout.Size() != 0u) { |
| if (static_cast<size_t>(bss_end_ - dex_cache_arrays) < layout.Size()) { |
| *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zu for '%s' with " |
| "truncated dex cache arrays, %zu < %zu.", |
| GetLocation().c_str(), |
| i, |
| dex_file_location.c_str(), |
| static_cast<size_t>(bss_end_ - dex_cache_arrays), |
| layout.Size()); |
| return false; |
| } |
| current_dex_cache_arrays = dex_cache_arrays; |
| dex_cache_arrays += layout.Size(); |
| } |
| } |
| |
| 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, |
| lookup_table_data, |
| class_offsets_pointer, |
| current_dex_cache_arrays); |
| 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); |
| } |
| } |
| |
| if (dex_cache_arrays != bss_end_) { |
| // We expect the bss section to be either empty (dex_cache_arrays and bss_end_ |
| // both null) or contain just the dex cache arrays and nothing else. |
| *error_msg = StringPrintf("In oat file '%s' found unexpected bss size bigger by %zu bytes.", |
| GetLocation().c_str(), |
| static_cast<size_t>(bss_end_ - dex_cache_arrays)); |
| return false; |
| } |
| return true; |
| } |
| |
| //////////////////////// |
| // OatFile via dlopen // |
| //////////////////////// |
| |
| static bool RegisterOatFileLocation(const std::string& location) { |
| if (!kIsTargetBuild) { |
| Runtime* const runtime = Runtime::Current(); |
| if (runtime != nullptr && !runtime->IsAotCompiler()) { |
| return runtime->GetOatFileManager().RegisterOatFileLocation(location); |
| } |
| return false; |
| } |
| return true; |
| } |
| |
| static void UnregisterOatFileLocation(const std::string& location) { |
| if (!kIsTargetBuild) { |
| Runtime* const runtime = Runtime::Current(); |
| if (runtime != nullptr && !runtime->IsAotCompiler()) { |
| runtime->GetOatFileManager().UnRegisterOatFileLocation(location); |
| } |
| } |
| } |
| |
| class DlOpenOatFile FINAL : public OatFileBase { |
| public: |
| DlOpenOatFile(const std::string& filename, bool executable) |
| : OatFileBase(filename, executable), |
| dlopen_handle_(nullptr), |
| shared_objects_before_(0), |
| first_oat_(RegisterOatFileLocation(filename)) { |
| } |
| |
| ~DlOpenOatFile() { |
| if (dlopen_handle_ != nullptr) { |
| dlclose(dlopen_handle_); |
| } |
| UnregisterOatFileLocation(GetLocation()); |
| } |
| |
| protected: |
| const uint8_t* FindDynamicSymbolAddress(const std::string& symbol_name, |
| std::string* error_msg) const OVERRIDE { |
| const uint8_t* ptr = |
| reinterpret_cast<const uint8_t*>(dlsym(dlopen_handle_, symbol_name.c_str())); |
| if (ptr == nullptr) { |
| *error_msg = dlerror(); |
| } |
| return ptr; |
| } |
| |
| void PreLoad() OVERRIDE; |
| |
| bool Load(const std::string& elf_filename, |
| uint8_t* oat_file_begin, |
| bool writable, |
| bool executable, |
| bool low_4gb, |
| std::string* error_msg) OVERRIDE; |
| |
| // Ask the linker where it mmaped the file and notify our mmap wrapper of the regions. |
| void PreSetup(const std::string& elf_filename) OVERRIDE; |
| |
| private: |
| bool Dlopen(const std::string& elf_filename, |
| uint8_t* oat_file_begin, |
| std::string* error_msg); |
| |
| // dlopen handle during runtime. |
| void* dlopen_handle_; // TODO: Unique_ptr with custom deleter. |
| |
| // Dummy memory map objects corresponding to the regions mapped by dlopen. |
| std::vector<std::unique_ptr<MemMap>> dlopen_mmaps_; |
| |
| // The number of shared objects the linker told us about before loading. Used to |
| // (optimistically) optimize the PreSetup stage (see comment there). |
| size_t shared_objects_before_; |
| |
| // Track the registration status (= was this the first oat file) for the location. |
| const bool first_oat_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DlOpenOatFile); |
| }; |
| |
| void DlOpenOatFile::PreLoad() { |
| #ifdef __APPLE__ |
| UNUSED(shared_objects_before_); |
| LOG(FATAL) << "Should not reach here."; |
| UNREACHABLE(); |
| #else |
| // Count the entries in dl_iterate_phdr we get at this point in time. |
| struct dl_iterate_context { |
| static int callback(struct dl_phdr_info *info ATTRIBUTE_UNUSED, |
| size_t size ATTRIBUTE_UNUSED, |
| void *data) { |
| reinterpret_cast<dl_iterate_context*>(data)->count++; |
| return 0; // Continue iteration. |
| } |
| size_t count = 0; |
| } context; |
| |
| dl_iterate_phdr(dl_iterate_context::callback, &context); |
| shared_objects_before_ = context.count; |
| #endif |
| } |
| |
| bool DlOpenOatFile::Load(const std::string& elf_filename, |
| uint8_t* oat_file_begin, |
| bool writable, |
| bool executable, |
| bool low_4gb, |
| std::string* error_msg) { |
| // 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) { |
| *error_msg = "DlOpen is disabled."; |
| return false; |
| } |
| if (low_4gb) { |
| *error_msg = "DlOpen does not support low 4gb loading."; |
| return false; |
| } |
| if (writable) { |
| *error_msg = "DlOpen does not support writable loading."; |
| return false; |
| } |
| if (!executable) { |
| *error_msg = "DlOpen does not support non-executable loading."; |
| return false; |
| } |
| |
| // dlopen always returns the same library if it is already opened on the host. For this reason |
| // we only use dlopen if we are the target or we do not already have the dex file opened. Having |
| // the same library loaded multiple times at different addresses is required for class unloading |
| // and for having dex caches arrays in the .bss section. |
| if (!kIsTargetBuild) { |
| if (!kUseDlopenOnHost) { |
| *error_msg = "DlOpen disabled for host."; |
| return false; |
| } |
| // For RAII, tracking multiple loads is done in the constructor and destructor. The result is |
| // stored in the first_oat_ flag. |
| if (!first_oat_) { |
| *error_msg = "Loading oat files multiple times with dlopen not supported on host."; |
| return false; |
| } |
| } |
| |
| bool success = Dlopen(elf_filename, oat_file_begin, error_msg); |
| DCHECK(dlopen_handle_ != nullptr || !success); |
| |
| return success; |
| } |
| |
| bool DlOpenOatFile::Dlopen(const std::string& elf_filename, |
| uint8_t* oat_file_begin, |
| std::string* error_msg) { |
| #ifdef __APPLE__ |
| // The dl_iterate_phdr syscall is missing. There is similar API on OSX, |
| // but let's fallback to the custom loading code for the time being. |
| UNUSED(elf_filename, oat_file_begin); |
| *error_msg = "Dlopen unsupported on Mac."; |
| return false; |
| #else |
| { |
| UniqueCPtr<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 ART_TARGET_ANDROID |
| android_dlextinfo extinfo; |
| extinfo.flags = ANDROID_DLEXT_FORCE_LOAD | // Force-load, don't reuse handle |
| // (open oat files multiple |
| // times). |
| ANDROID_DLEXT_FORCE_FIXED_VADDR; // Take a non-zero vaddr as absolute |
| // (non-pic boot image). |
| if (oat_file_begin != nullptr) { // |
| extinfo.flags |= ANDROID_DLEXT_LOAD_AT_FIXED_ADDRESS; // Use the requested addr if |
| extinfo.reserved_addr = oat_file_begin; // vaddr = 0. |
| } // (pic boot image). |
| dlopen_handle_ = android_dlopen_ext(absolute_path.get(), RTLD_NOW, &extinfo); |
| #else |
| dlopen_handle_ = dlopen(absolute_path.get(), RTLD_NOW); |
| UNUSED(oat_file_begin); |
| #endif // ART_TARGET_ANDROID |
| } |
| if (dlopen_handle_ == nullptr) { |
| *error_msg = StringPrintf("Failed to dlopen '%s': %s", elf_filename.c_str(), dlerror()); |
| return false; |
| } |
| return true; |
| #endif |
| } |
| |
| void DlOpenOatFile::PreSetup(const std::string& elf_filename) { |
| #ifdef __APPLE__ |
| UNUSED(elf_filename); |
| LOG(FATAL) << "Should not reach here."; |
| UNREACHABLE(); |
| #else |
| struct dl_iterate_context { |
| static int callback(struct dl_phdr_info *info, size_t /* size */, void *data) { |
| auto* context = reinterpret_cast<dl_iterate_context*>(data); |
| context->shared_objects_seen++; |
| if (context->shared_objects_seen < context->shared_objects_before) { |
| // We haven't been called yet for anything we haven't seen before. Just continue. |
| // Note: this is aggressively optimistic. If another thread was unloading a library, |
| // we may miss out here. However, this does not happen often in practice. |
| return 0; |
| } |
| |
| // See whether this callback corresponds to the file which we have just loaded. |
| bool contains_begin = false; |
| for (int i = 0; i < info->dlpi_phnum; i++) { |
| if (info->dlpi_phdr[i].p_type == PT_LOAD) { |
| uint8_t* vaddr = reinterpret_cast<uint8_t*>(info->dlpi_addr + |
| info->dlpi_phdr[i].p_vaddr); |
| size_t memsz = info->dlpi_phdr[i].p_memsz; |
| if (vaddr <= context->begin_ && context->begin_ < vaddr + memsz) { |
| contains_begin = true; |
| break; |
| } |
| } |
| } |
| // Add dummy mmaps for this file. |
| if (contains_begin) { |
| for (int i = 0; i < info->dlpi_phnum; i++) { |
| if (info->dlpi_phdr[i].p_type == PT_LOAD) { |
| uint8_t* vaddr = reinterpret_cast<uint8_t*>(info->dlpi_addr + |
| info->dlpi_phdr[i].p_vaddr); |
| size_t memsz = info->dlpi_phdr[i].p_memsz; |
| MemMap* mmap = MemMap::MapDummy(info->dlpi_name, vaddr, memsz); |
| context->dlopen_mmaps_->push_back(std::unique_ptr<MemMap>(mmap)); |
| } |
| } |
| return 1; // Stop iteration and return 1 from dl_iterate_phdr. |
| } |
| return 0; // Continue iteration and return 0 from dl_iterate_phdr when finished. |
| } |
| const uint8_t* const begin_; |
| std::vector<std::unique_ptr<MemMap>>* const dlopen_mmaps_; |
| const size_t shared_objects_before; |
| size_t shared_objects_seen; |
| }; |
| dl_iterate_context context = { Begin(), &dlopen_mmaps_, shared_objects_before_, 0}; |
| |
| if (dl_iterate_phdr(dl_iterate_context::callback, &context) == 0) { |
| // Hm. Maybe our optimization went wrong. Try another time with shared_objects_before == 0 |
| // before giving up. This should be unusual. |
| VLOG(oat) << "Need a second run in PreSetup, didn't find with shared_objects_before=" |
| << shared_objects_before_; |
| dl_iterate_context context0 = { Begin(), &dlopen_mmaps_, 0, 0}; |
| if (dl_iterate_phdr(dl_iterate_context::callback, &context0) == 0) { |
| // OK, give up and print an error. |
| PrintFileToLog("/proc/self/maps", LogSeverity::WARNING); |
| LOG(ERROR) << "File " << elf_filename << " loaded with dlopen but cannot find its mmaps."; |
| } |
| } |
| #endif |
| } |
| |
| //////////////////////////////////////////////// |
| // OatFile via our own ElfFile implementation // |
| //////////////////////////////////////////////// |
| |
| class ElfOatFile FINAL : public OatFileBase { |
| public: |
| ElfOatFile(const std::string& filename, bool executable) : OatFileBase(filename, executable) {} |
| |
| static ElfOatFile* OpenElfFile(File* file, |
| const std::string& location, |
| uint8_t* requested_base, |
| uint8_t* oat_file_begin, // Override base if not null |
| bool writable, |
| bool executable, |
| bool low_4gb, |
| const char* abs_dex_location, |
| std::string* error_msg); |
| |
| bool InitializeFromElfFile(ElfFile* elf_file, |
| const char* abs_dex_location, |
| std::string* error_msg); |
| |
| protected: |
| const uint8_t* FindDynamicSymbolAddress(const std::string& symbol_name, |
| std::string* error_msg) const OVERRIDE { |
| const uint8_t* ptr = elf_file_->FindDynamicSymbolAddress(symbol_name); |
| if (ptr == nullptr) { |
| *error_msg = "(Internal implementation could not find symbol)"; |
| } |
| return ptr; |
| } |
| |
| void PreLoad() OVERRIDE { |
| } |
| |
| bool Load(const std::string& elf_filename, |
| uint8_t* oat_file_begin, // Override where the file is loaded to if not null |
| bool writable, |
| bool executable, |
| bool low_4gb, |
| std::string* error_msg) OVERRIDE; |
| |
| void PreSetup(const std::string& elf_filename ATTRIBUTE_UNUSED) OVERRIDE { |
| } |
| |
| private: |
| bool ElfFileOpen(File* file, |
| uint8_t* oat_file_begin, // Override where the file is loaded to if not null |
| bool writable, |
| bool executable, |
| bool low_4gb, |
| std::string* error_msg); |
| |
| private: |
| // Backing memory map for oat file during cross compilation. |
| std::unique_ptr<ElfFile> elf_file_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ElfOatFile); |
| }; |
| |
| ElfOatFile* ElfOatFile::OpenElfFile(File* file, |
| const std::string& location, |
| uint8_t* requested_base, |
| uint8_t* oat_file_begin, // Override base if not null |
| bool writable, |
| bool executable, |
| bool low_4gb, |
| const char* abs_dex_location, |
| std::string* error_msg) { |
| ScopedTrace trace("Open elf file " + location); |
| std::unique_ptr<ElfOatFile> oat_file(new ElfOatFile(location, executable)); |
| bool success = oat_file->ElfFileOpen(file, |
| oat_file_begin, |
| writable, |
| low_4gb, |
| executable, |
| error_msg); |
| if (!success) { |
| CHECK(!error_msg->empty()); |
| return nullptr; |
| } |
| |
| // Complete the setup. |
| if (!oat_file->ComputeFields(requested_base, file->GetPath(), error_msg)) { |
| return nullptr; |
| } |
| |
| if (!oat_file->Setup(abs_dex_location, error_msg)) { |
| return nullptr; |
| } |
| |
| return oat_file.release(); |
| } |
| |
| bool ElfOatFile::InitializeFromElfFile(ElfFile* elf_file, |
| const char* abs_dex_location, |
| std::string* error_msg) { |
| ScopedTrace trace(__PRETTY_FUNCTION__); |
| if (IsExecutable()) { |
| *error_msg = "Cannot initialize from elf file in executable mode."; |
| return false; |
| } |
| elf_file_.reset(elf_file); |
| uint64_t offset, size; |
| bool has_section = elf_file->GetSectionOffsetAndSize(".rodata", &offset, &size); |
| CHECK(has_section); |
| SetBegin(elf_file->Begin() + offset); |
| SetEnd(elf_file->Begin() + size + offset); |
| // Ignore the optional .bss section when opening non-executable. |
| return Setup(abs_dex_location, error_msg); |
| } |
| |
| bool ElfOatFile::Load(const std::string& elf_filename, |
| uint8_t* oat_file_begin, // Override where the file is loaded to if not null |
| bool writable, |
| bool executable, |
| bool low_4gb, |
| std::string* error_msg) { |
| ScopedTrace trace(__PRETTY_FUNCTION__); |
| std::unique_ptr<File> file(OS::OpenFileForReading(elf_filename.c_str())); |
| if (file == nullptr) { |
| *error_msg = StringPrintf("Failed to open oat filename for reading: %s", strerror(errno)); |
| return false; |
| } |
| return ElfOatFile::ElfFileOpen(file.get(), |
| oat_file_begin, |
| writable, |
| executable, |
| low_4gb, |
| error_msg); |
| } |
| |
| bool ElfOatFile::ElfFileOpen(File* file, |
| uint8_t* oat_file_begin, |
| bool writable, |
| bool executable, |
| bool low_4gb, |
| std::string* error_msg) { |
| ScopedTrace trace(__PRETTY_FUNCTION__); |
| // TODO: rename requested_base to oat_data_begin |
| elf_file_.reset(ElfFile::Open(file, |
| writable, |
| /*program_header_only*/true, |
| low_4gb, |
| error_msg, |
| oat_file_begin)); |
| if (elf_file_ == nullptr) { |
| DCHECK(!error_msg->empty()); |
| return false; |
| } |
| bool loaded = elf_file_->Load(executable, low_4gb, error_msg); |
| DCHECK(loaded || !error_msg->empty()); |
| return loaded; |
| } |
| |
| ////////////////////////// |
| // General OatFile code // |
| ////////////////////////// |
| |
| 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; |
| } |
| |
| static void 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<ElfOatFile> oat_file(new ElfOatFile(location, false /* executable */)); |
| return oat_file->InitializeFromElfFile(elf_file, 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, |
| bool low_4gb, |
| const char* abs_dex_location, |
| std::string* error_msg) { |
| ScopedTrace trace("Open oat file " + location); |
| CHECK(!filename.empty()) << location; |
| CheckLocation(location); |
| |
| // Check that the file even exists, fast-fail. |
| if (!OS::FileExists(filename.c_str())) { |
| *error_msg = StringPrintf("File %s does not exist.", filename.c_str()); |
| return nullptr; |
| } |
| |
| // Try dlopen first, as it is required for native debuggability. This will fail fast if dlopen is |
| // disabled. |
| OatFile* with_dlopen = OatFileBase::OpenOatFile<DlOpenOatFile>(filename, |
| location, |
| requested_base, |
| oat_file_begin, |
| false, |
| executable, |
| low_4gb, |
| abs_dex_location, |
| error_msg); |
| if (with_dlopen != nullptr) { |
| return with_dlopen; |
| } |
| if (kPrintDlOpenErrorMessage) { |
| LOG(ERROR) << "Failed to dlopen: " << filename << " with error " << *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. |
| OatFile* with_internal = OatFileBase::OpenOatFile<ElfOatFile>(filename, |
| location, |
| requested_base, |
| oat_file_begin, |
| false, |
| executable, |
| low_4gb, |
| abs_dex_location, |
| error_msg); |
| return with_internal; |
| } |
| |
| OatFile* OatFile::OpenWritable(File* file, |
| const std::string& location, |
| const char* abs_dex_location, |
| std::string* error_msg) { |
| CheckLocation(location); |
| return ElfOatFile::OpenElfFile(file, |
| location, |
| nullptr, |
| nullptr, |
| true, |
| false, |
| /*low_4gb*/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 ElfOatFile::OpenElfFile(file, |
| location, |
| nullptr, |
| nullptr, |
| false, |
| false, |
| /*low_4gb*/false, |
| abs_dex_location, |
| error_msg); |
| } |
| |
| 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), |
| secondary_lookup_lock_("OatFile secondary lookup lock", kOatFileSecondaryLookupLock) { |
| CHECK(!location_.empty()); |
| } |
| |
| OatFile::~OatFile() { |
| STLDeleteElements(&oat_dex_files_storage_); |
| } |
| |
| 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 uint8_t* lookup_table_data, |
| const uint32_t* oat_class_offsets_pointer, |
| uint8_t* dex_cache_arrays) |
| : 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), |
| lookup_table_data_(lookup_table_data), |
| oat_class_offsets_pointer_(oat_class_offsets_pointer), |
| dex_cache_arrays_(dex_cache_arrays) {} |
| |
| 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 { |
| ScopedTrace trace(__PRETTY_FUNCTION__); |
| return DexFile::Open(dex_file_pointer_, |
| FileSize(), |
| dex_file_location_, |
| dex_file_location_checksum_, |
| this, |
| false /* verify */, |
| 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::HasPatchInfo() const { |
| return GetOatHeader().HasPatchInfo(); |
| } |
| |
| bool OatFile::IsPic() const { |
| return GetOatHeader().IsPic(); |
| // TODO: Check against oat_patches. b/18144996 |
| } |
| |
| bool OatFile::IsDebuggable() const { |
| return GetOatHeader().IsDebuggable(); |
| } |
| |
| CompilerFilter::Filter OatFile::GetCompilerFilter() const { |
| return GetOatHeader().GetCompilerFilter(); |
| } |
| |
| 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 |
