| /* |
| * 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 "dex_file.h" |
| |
| #include <fcntl.h> |
| #include <limits.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/file.h> |
| #include <sys/stat.h> |
| |
| #include "base/logging.h" |
| #include "base/stringprintf.h" |
| #include "class_linker.h" |
| #include "dex_file_verifier.h" |
| #include "globals.h" |
| #include "leb128.h" |
| #include "mirror/abstract_method-inl.h" |
| #include "mirror/field.h" |
| #include "mirror/field-inl.h" |
| #include "mirror/string.h" |
| #include "os.h" |
| #include "safe_map.h" |
| #include "thread.h" |
| #include "UniquePtr.h" |
| #include "utf.h" |
| #include "utils.h" |
| #include "well_known_classes.h" |
| #include "zip_archive.h" |
| |
| namespace art { |
| |
| const byte DexFile::kDexMagic[] = { 'd', 'e', 'x', '\n' }; |
| const byte DexFile::kDexMagicVersion[] = { '0', '3', '5', '\0' }; |
| |
| DexFile::ClassPathEntry DexFile::FindInClassPath(const StringPiece& descriptor, |
| const ClassPath& class_path) { |
| for (size_t i = 0; i != class_path.size(); ++i) { |
| const DexFile* dex_file = class_path[i]; |
| const DexFile::ClassDef* dex_class_def = dex_file->FindClassDef(descriptor); |
| if (dex_class_def != NULL) { |
| return ClassPathEntry(dex_file, dex_class_def); |
| } |
| } |
| // TODO: remove reinterpret_cast when issue with -std=gnu++0x host issue resolved |
| return ClassPathEntry(reinterpret_cast<const DexFile*>(NULL), |
| reinterpret_cast<const DexFile::ClassDef*>(NULL)); |
| } |
| |
| bool DexFile::GetChecksum(const std::string& filename, uint32_t& checksum) { |
| if (IsValidZipFilename(filename)) { |
| UniquePtr<ZipArchive> zip_archive(ZipArchive::Open(filename)); |
| if (zip_archive.get() == NULL) { |
| return false; |
| } |
| UniquePtr<ZipEntry> zip_entry(zip_archive->Find(kClassesDex)); |
| if (zip_entry.get() == NULL) { |
| return false; |
| } |
| checksum = zip_entry->GetCrc32(); |
| return true; |
| } |
| if (IsValidDexFilename(filename)) { |
| UniquePtr<const DexFile> dex_file(DexFile::OpenFile(filename, filename, false)); |
| if (dex_file.get() == NULL) { |
| return false; |
| } |
| checksum = dex_file->GetHeader().checksum_; |
| return true; |
| } |
| return false; |
| } |
| |
| const DexFile* DexFile::Open(const std::string& filename, |
| const std::string& location) { |
| if (IsValidZipFilename(filename)) { |
| return DexFile::OpenZip(filename, location); |
| } |
| if (!IsValidDexFilename(filename)) { |
| LOG(WARNING) << "Attempting to open dex file with unknown extension '" << filename << "'"; |
| } |
| return DexFile::OpenFile(filename, location, true); |
| } |
| |
| int DexFile::GetPermissions() const { |
| if (mem_map_.get() == NULL) { |
| return 0; |
| } else { |
| return mem_map_->GetProtect(); |
| } |
| } |
| |
| const DexFile* DexFile::OpenFile(const std::string& filename, |
| const std::string& location, |
| bool verify) { |
| CHECK(!location.empty()) << filename; |
| int fd = open(filename.c_str(), O_RDONLY); // TODO: scoped_fd |
| if (fd == -1) { |
| PLOG(ERROR) << "open(\"" << filename << "\", O_RDONLY) failed"; |
| return NULL; |
| } |
| struct stat sbuf; |
| memset(&sbuf, 0, sizeof(sbuf)); |
| if (fstat(fd, &sbuf) == -1) { |
| PLOG(ERROR) << "fstat \"" << filename << "\" failed"; |
| close(fd); |
| return NULL; |
| } |
| if (S_ISDIR(sbuf.st_mode)) { |
| LOG(ERROR) << "attempt to mmap directory \"" << filename << "\""; |
| return NULL; |
| } |
| size_t length = sbuf.st_size; |
| UniquePtr<MemMap> map(MemMap::MapFile(length, PROT_READ, MAP_PRIVATE, fd, 0)); |
| if (map.get() == NULL) { |
| LOG(ERROR) << "mmap \"" << filename << "\" failed"; |
| close(fd); |
| return NULL; |
| } |
| close(fd); |
| |
| if (map->Size() < sizeof(DexFile::Header)) { |
| LOG(ERROR) << "Failed to open dex file '" << filename << "' that is too short to have a header"; |
| return NULL; |
| } |
| |
| const Header* dex_header = reinterpret_cast<const Header*>(map->Begin()); |
| |
| const DexFile* dex_file = OpenMemory(location, dex_header->checksum_, map.release()); |
| if (dex_file == NULL) { |
| LOG(ERROR) << "Failed to open dex file '" << filename << "' from memory"; |
| return NULL; |
| } |
| |
| if (verify && !DexFileVerifier::Verify(dex_file, dex_file->Begin(), dex_file->Size())) { |
| LOG(ERROR) << "Failed to verify dex file '" << filename << "'"; |
| return NULL; |
| } |
| |
| return dex_file; |
| } |
| |
| const char* DexFile::kClassesDex = "classes.dex"; |
| |
| const DexFile* DexFile::OpenZip(const std::string& filename, |
| const std::string& location) { |
| UniquePtr<ZipArchive> zip_archive(ZipArchive::Open(filename)); |
| if (zip_archive.get() == NULL) { |
| LOG(ERROR) << "Failed to open " << filename << " when looking for classes.dex"; |
| return NULL; |
| } |
| return DexFile::Open(*zip_archive.get(), location); |
| } |
| |
| const DexFile* DexFile::OpenMemory(const std::string& location, |
| uint32_t location_checksum, |
| MemMap* mem_map) { |
| return OpenMemory(mem_map->Begin(), |
| mem_map->Size(), |
| location, |
| location_checksum, |
| mem_map); |
| } |
| |
| const DexFile* DexFile::Open(const ZipArchive& zip_archive, const std::string& location) { |
| CHECK(!location.empty()); |
| UniquePtr<ZipEntry> zip_entry(zip_archive.Find(kClassesDex)); |
| if (zip_entry.get() == NULL) { |
| LOG(ERROR) << "Failed to find classes.dex within " << location; |
| return NULL; |
| } |
| |
| uint32_t length = zip_entry->GetUncompressedLength(); |
| std::string name("classes.dex extracted in memory from "); |
| name += location; |
| UniquePtr<MemMap> map(MemMap::MapAnonymous(name.c_str(), NULL, length, PROT_READ | PROT_WRITE)); |
| if (map.get() == NULL) { |
| LOG(ERROR) << "mmap classes.dex for \"" << location << "\" failed"; |
| return NULL; |
| } |
| |
| // Extract classes.dex |
| bool success = zip_entry->ExtractToMemory(*map.get()); |
| if (!success) { |
| LOG(ERROR) << "Failed to extract classes.dex from '" << location << "' to memory"; |
| return NULL; |
| } |
| |
| const DexFile* dex_file = OpenMemory(location, zip_entry->GetCrc32(), map.release()); |
| if (dex_file == NULL) { |
| LOG(ERROR) << "Failed to open dex file '" << location << "' from memory"; |
| return NULL; |
| } |
| |
| if (!DexFileVerifier::Verify(dex_file, dex_file->Begin(), dex_file->Size())) { |
| LOG(ERROR) << "Failed to verify dex file '" << location << "'"; |
| return NULL; |
| } |
| |
| return dex_file; |
| } |
| |
| const DexFile* DexFile::OpenMemory(const byte* base, |
| size_t size, |
| const std::string& location, |
| uint32_t location_checksum, |
| MemMap* mem_map) { |
| CHECK_ALIGNED(base, 4); // various dex file structures must be word aligned |
| UniquePtr<DexFile> dex_file(new DexFile(base, size, location, location_checksum, mem_map)); |
| if (!dex_file->Init()) { |
| return NULL; |
| } else { |
| return dex_file.release(); |
| } |
| } |
| |
| DexFile::~DexFile() { |
| // We don't call DeleteGlobalRef on dex_object_ because we're only called by DestroyJavaVM, and |
| // that's only called after DetachCurrentThread, which means there's no JNIEnv. We could |
| // re-attach, but cleaning up these global references is not obviously useful. It's not as if |
| // the global reference table is otherwise empty! |
| } |
| |
| class ScopedJniMonitorLock { |
| public: |
| ScopedJniMonitorLock(JNIEnv* env, jobject locked) : env_(env), locked_(locked){ |
| env->MonitorEnter(locked_); |
| } |
| ~ScopedJniMonitorLock() { |
| env_->MonitorExit(locked_); |
| } |
| private: |
| JNIEnv* const env_; |
| const jobject locked_; |
| }; |
| |
| jobject DexFile::GetDexObject(JNIEnv* env) const { |
| { |
| ScopedJniMonitorLock lock(env, WellKnownClasses::com_android_dex_Dex); |
| if (dex_object_ != NULL) { |
| return dex_object_; |
| } |
| } |
| void* address = const_cast<void*>(reinterpret_cast<const void*>(begin_)); |
| jobject byte_buffer = env->NewDirectByteBuffer(address, size_); |
| if (byte_buffer == NULL) { |
| return NULL; |
| } |
| |
| ScopedJniMonitorLock lock(env, WellKnownClasses::com_android_dex_Dex); |
| // Re-test to see if someone beat us to the creation when we had the lock released. |
| if (dex_object_ != NULL) { |
| return dex_object_; |
| } |
| jvalue args[1]; |
| args[0].l = byte_buffer; |
| jobject local = env->CallStaticObjectMethodA(WellKnownClasses::com_android_dex_Dex, |
| WellKnownClasses::com_android_dex_Dex_create, |
| args); |
| if (local == NULL) { |
| return NULL; |
| } |
| |
| dex_object_ = env->NewGlobalRef(local); |
| return dex_object_; |
| } |
| |
| bool DexFile::Init() { |
| InitMembers(); |
| if (!CheckMagicAndVersion()) { |
| return false; |
| } |
| InitIndex(); |
| return true; |
| } |
| |
| void DexFile::InitMembers() { |
| const byte* b = begin_; |
| header_ = reinterpret_cast<const Header*>(b); |
| const Header* h = header_; |
| string_ids_ = reinterpret_cast<const StringId*>(b + h->string_ids_off_); |
| type_ids_ = reinterpret_cast<const TypeId*>(b + h->type_ids_off_); |
| field_ids_ = reinterpret_cast<const FieldId*>(b + h->field_ids_off_); |
| method_ids_ = reinterpret_cast<const MethodId*>(b + h->method_ids_off_); |
| proto_ids_ = reinterpret_cast<const ProtoId*>(b + h->proto_ids_off_); |
| class_defs_ = reinterpret_cast<const ClassDef*>(b + h->class_defs_off_); |
| DCHECK_EQ(size_, header_->file_size_); |
| } |
| |
| bool DexFile::CheckMagicAndVersion() const { |
| CHECK(header_->magic_ != NULL) << GetLocation(); |
| if (!IsMagicValid(header_->magic_)) { |
| LOG(ERROR) << "Unrecognized magic number in " << GetLocation() << ":" |
| << " " << header_->magic_[0] |
| << " " << header_->magic_[1] |
| << " " << header_->magic_[2] |
| << " " << header_->magic_[3]; |
| return false; |
| } |
| if (!IsVersionValid(header_->magic_)) { |
| LOG(ERROR) << "Unrecognized version number in " << GetLocation() << ":" |
| << " " << header_->magic_[4] |
| << " " << header_->magic_[5] |
| << " " << header_->magic_[6] |
| << " " << header_->magic_[7]; |
| return false; |
| } |
| return true; |
| } |
| |
| bool DexFile::IsMagicValid(const byte* magic) { |
| return (memcmp(magic, kDexMagic, sizeof(kDexMagic)) == 0); |
| } |
| |
| bool DexFile::IsVersionValid(const byte* magic) { |
| const byte* version = &magic[sizeof(kDexMagic)]; |
| return (memcmp(version, kDexMagicVersion, sizeof(kDexMagicVersion)) == 0); |
| } |
| |
| uint32_t DexFile::GetVersion() const { |
| const char* version = reinterpret_cast<const char*>(&GetHeader().magic_[sizeof(kDexMagic)]); |
| return atoi(version); |
| } |
| |
| int32_t DexFile::GetStringLength(const StringId& string_id) const { |
| const byte* ptr = begin_ + string_id.string_data_off_; |
| return DecodeUnsignedLeb128(&ptr); |
| } |
| |
| // Returns a pointer to the UTF-8 string data referred to by the given string_id. |
| const char* DexFile::GetStringDataAndLength(const StringId& string_id, uint32_t* length) const { |
| DCHECK(length != NULL) << GetLocation(); |
| const byte* ptr = begin_ + string_id.string_data_off_; |
| *length = DecodeUnsignedLeb128(&ptr); |
| return reinterpret_cast<const char*>(ptr); |
| } |
| |
| void DexFile::InitIndex() { |
| CHECK_EQ(index_.size(), 0U) << GetLocation(); |
| for (size_t i = 0; i < NumClassDefs(); ++i) { |
| const ClassDef& class_def = GetClassDef(i); |
| const char* descriptor = GetClassDescriptor(class_def); |
| index_.Put(descriptor, i); |
| } |
| } |
| |
| bool DexFile::FindClassDefIndex(const StringPiece& descriptor, uint32_t& idx) const { |
| Index::const_iterator it = index_.find(descriptor); |
| if (it == index_.end()) { |
| return false; |
| } |
| idx = it->second; |
| return true; |
| } |
| |
| const DexFile::ClassDef* DexFile::FindClassDef(const StringPiece& descriptor) const { |
| uint32_t idx; |
| if (FindClassDefIndex(descriptor, idx)) { |
| return &GetClassDef(idx); |
| } |
| return NULL; |
| } |
| |
| const DexFile::FieldId* DexFile::FindFieldId(const DexFile::TypeId& declaring_klass, |
| const DexFile::StringId& name, |
| const DexFile::TypeId& type) const { |
| // Binary search MethodIds knowing that they are sorted by class_idx, name_idx then proto_idx |
| const uint16_t class_idx = GetIndexForTypeId(declaring_klass); |
| const uint32_t name_idx = GetIndexForStringId(name); |
| const uint16_t type_idx = GetIndexForTypeId(type); |
| uint32_t lo = 0; |
| uint32_t hi = NumFieldIds() - 1; |
| while (hi >= lo) { |
| uint32_t mid = (hi + lo) / 2; |
| const DexFile::FieldId& field = GetFieldId(mid); |
| if (class_idx > field.class_idx_) { |
| lo = mid + 1; |
| } else if (class_idx < field.class_idx_) { |
| hi = mid - 1; |
| } else { |
| if (name_idx > field.name_idx_) { |
| lo = mid + 1; |
| } else if (name_idx < field.name_idx_) { |
| hi = mid - 1; |
| } else { |
| if (type_idx > field.type_idx_) { |
| lo = mid + 1; |
| } else if (type_idx < field.type_idx_) { |
| hi = mid - 1; |
| } else { |
| return &field; |
| } |
| } |
| } |
| } |
| return NULL; |
| } |
| |
| const DexFile::MethodId* DexFile::FindMethodId(const DexFile::TypeId& declaring_klass, |
| const DexFile::StringId& name, |
| const DexFile::ProtoId& signature) const { |
| // Binary search MethodIds knowing that they are sorted by class_idx, name_idx then proto_idx |
| const uint16_t class_idx = GetIndexForTypeId(declaring_klass); |
| const uint32_t name_idx = GetIndexForStringId(name); |
| const uint16_t proto_idx = GetIndexForProtoId(signature); |
| uint32_t lo = 0; |
| uint32_t hi = NumMethodIds() - 1; |
| while (hi >= lo) { |
| uint32_t mid = (hi + lo) / 2; |
| const DexFile::MethodId& method = GetMethodId(mid); |
| if (class_idx > method.class_idx_) { |
| lo = mid + 1; |
| } else if (class_idx < method.class_idx_) { |
| hi = mid - 1; |
| } else { |
| if (name_idx > method.name_idx_) { |
| lo = mid + 1; |
| } else if (name_idx < method.name_idx_) { |
| hi = mid - 1; |
| } else { |
| if (proto_idx > method.proto_idx_) { |
| lo = mid + 1; |
| } else if (proto_idx < method.proto_idx_) { |
| hi = mid - 1; |
| } else { |
| return &method; |
| } |
| } |
| } |
| } |
| return NULL; |
| } |
| |
| const DexFile::StringId* DexFile::FindStringId(const std::string& string) const { |
| uint32_t lo = 0; |
| uint32_t hi = NumStringIds() - 1; |
| while (hi >= lo) { |
| uint32_t mid = (hi + lo) / 2; |
| uint32_t length; |
| const DexFile::StringId& str_id = GetStringId(mid); |
| const char* str = GetStringDataAndLength(str_id, &length); |
| int compare = CompareModifiedUtf8ToModifiedUtf8AsUtf16CodePointValues(string.c_str(), str); |
| if (compare > 0) { |
| lo = mid + 1; |
| } else if (compare < 0) { |
| hi = mid - 1; |
| } else { |
| return &str_id; |
| } |
| } |
| return NULL; |
| } |
| |
| const DexFile::TypeId* DexFile::FindTypeId(uint32_t string_idx) const { |
| uint32_t lo = 0; |
| uint32_t hi = NumTypeIds() - 1; |
| while (hi >= lo) { |
| uint32_t mid = (hi + lo) / 2; |
| const TypeId& type_id = GetTypeId(mid); |
| if (string_idx > type_id.descriptor_idx_) { |
| lo = mid + 1; |
| } else if (string_idx < type_id.descriptor_idx_) { |
| hi = mid - 1; |
| } else { |
| return &type_id; |
| } |
| } |
| return NULL; |
| } |
| |
| const DexFile::ProtoId* DexFile::FindProtoId(uint16_t return_type_idx, |
| const std::vector<uint16_t>& signature_type_idxs) const { |
| uint32_t lo = 0; |
| uint32_t hi = NumProtoIds() - 1; |
| while (hi >= lo) { |
| uint32_t mid = (hi + lo) / 2; |
| const DexFile::ProtoId& proto = GetProtoId(mid); |
| int compare = return_type_idx - proto.return_type_idx_; |
| if (compare == 0) { |
| DexFileParameterIterator it(*this, proto); |
| size_t i = 0; |
| while (it.HasNext() && i < signature_type_idxs.size() && compare == 0) { |
| compare = signature_type_idxs[i] - it.GetTypeIdx(); |
| it.Next(); |
| i++; |
| } |
| if (compare == 0) { |
| if (it.HasNext()) { |
| compare = -1; |
| } else if (i < signature_type_idxs.size()) { |
| compare = 1; |
| } |
| } |
| } |
| if (compare > 0) { |
| lo = mid + 1; |
| } else if (compare < 0) { |
| hi = mid - 1; |
| } else { |
| return &proto; |
| } |
| } |
| return NULL; |
| } |
| |
| // Given a signature place the type ids into the given vector |
| bool DexFile::CreateTypeList(uint16_t* return_type_idx, std::vector<uint16_t>* param_type_idxs, |
| const std::string& signature) const { |
| if (signature[0] != '(') { |
| return false; |
| } |
| size_t offset = 1; |
| size_t end = signature.size(); |
| bool process_return = false; |
| while (offset < end) { |
| char c = signature[offset]; |
| offset++; |
| if (c == ')') { |
| process_return = true; |
| continue; |
| } |
| std::string descriptor; |
| descriptor += c; |
| while (c == '[') { // process array prefix |
| if (offset >= end) { // expect some descriptor following [ |
| return false; |
| } |
| c = signature[offset]; |
| offset++; |
| descriptor += c; |
| } |
| if (c == 'L') { // process type descriptors |
| do { |
| if (offset >= end) { // unexpected early termination of descriptor |
| return false; |
| } |
| c = signature[offset]; |
| offset++; |
| descriptor += c; |
| } while (c != ';'); |
| } |
| const DexFile::StringId* string_id = FindStringId(descriptor); |
| if (string_id == NULL) { |
| return false; |
| } |
| const DexFile::TypeId* type_id = FindTypeId(GetIndexForStringId(*string_id)); |
| if (type_id == NULL) { |
| return false; |
| } |
| uint16_t type_idx = GetIndexForTypeId(*type_id); |
| if (!process_return) { |
| param_type_idxs->push_back(type_idx); |
| } else { |
| *return_type_idx = type_idx; |
| return offset == end; // return true if the signature had reached a sensible end |
| } |
| } |
| return false; // failed to correctly parse return type |
| } |
| |
| // Materializes the method descriptor for a method prototype. Method |
| // descriptors are not stored directly in the dex file. Instead, one |
| // must assemble the descriptor from references in the prototype. |
| std::string DexFile::CreateMethodSignature(uint32_t proto_idx, int32_t* unicode_length) const { |
| const ProtoId& proto_id = GetProtoId(proto_idx); |
| std::string descriptor; |
| descriptor.push_back('('); |
| const TypeList* type_list = GetProtoParameters(proto_id); |
| size_t parameter_length = 0; |
| if (type_list != NULL) { |
| // A non-zero number of arguments. Append the type names. |
| for (size_t i = 0; i < type_list->Size(); ++i) { |
| const TypeItem& type_item = type_list->GetTypeItem(i); |
| uint32_t type_idx = type_item.type_idx_; |
| uint32_t type_length; |
| const char* name = StringByTypeIdx(type_idx, &type_length); |
| parameter_length += type_length; |
| descriptor.append(name); |
| } |
| } |
| descriptor.push_back(')'); |
| uint32_t return_type_idx = proto_id.return_type_idx_; |
| uint32_t return_type_length; |
| const char* name = StringByTypeIdx(return_type_idx, &return_type_length); |
| descriptor.append(name); |
| if (unicode_length != NULL) { |
| *unicode_length = parameter_length + return_type_length + 2; // 2 for ( and ) |
| } |
| return descriptor; |
| } |
| |
| int32_t DexFile::GetLineNumFromPC(const mirror::AbstractMethod* method, uint32_t rel_pc) const { |
| // For native method, lineno should be -2 to indicate it is native. Note that |
| // "line number == -2" is how libcore tells from StackTraceElement. |
| if (method->GetCodeItemOffset() == 0) { |
| return -2; |
| } |
| |
| const CodeItem* code_item = GetCodeItem(method->GetCodeItemOffset()); |
| DCHECK(code_item != NULL) << PrettyMethod(method) << " " << GetLocation(); |
| |
| // A method with no line number info should return -1 |
| LineNumFromPcContext context(rel_pc, -1); |
| DecodeDebugInfo(code_item, method->IsStatic(), method->GetDexMethodIndex(), LineNumForPcCb, |
| NULL, &context); |
| return context.line_num_; |
| } |
| |
| const DexFile::TryItem* DexFile::GetTryItems(const CodeItem& code_item, uint32_t offset) { |
| const uint16_t* insns_end_ = &code_item.insns_[code_item.insns_size_in_code_units_]; |
| return reinterpret_cast<const TryItem*> |
| (RoundUp(reinterpret_cast<uint32_t>(insns_end_), 4)) + offset; |
| } |
| |
| int32_t DexFile::FindCatchHandlerOffset(const CodeItem &code_item, int32_t tries_size, |
| uint32_t address) { |
| // Note: Signed type is important for max and min. |
| int32_t min = 0; |
| int32_t max = tries_size - 1; |
| |
| while (max >= min) { |
| int32_t mid = (min + max) / 2; |
| const TryItem* try_item = DexFile::GetTryItems(code_item, mid); |
| uint32_t start = try_item->start_addr_; |
| if (address < start) { |
| max = mid - 1; |
| } else { |
| uint32_t end = start + try_item->insn_count_; |
| if (address >= end) { |
| min = mid + 1; |
| } else { // We have a winner! |
| return (int32_t) try_item->handler_off_; |
| } |
| } |
| } |
| // No match. |
| return -1; |
| } |
| |
| void DexFile::DecodeDebugInfo0(const CodeItem* code_item, bool is_static, uint32_t method_idx, |
| DexDebugNewPositionCb position_cb, DexDebugNewLocalCb local_cb, |
| void* context, const byte* stream, LocalInfo* local_in_reg) const { |
| uint32_t line = DecodeUnsignedLeb128(&stream); |
| uint32_t parameters_size = DecodeUnsignedLeb128(&stream); |
| uint16_t arg_reg = code_item->registers_size_ - code_item->ins_size_; |
| uint32_t address = 0; |
| bool need_locals = (local_cb != NULL); |
| |
| if (!is_static) { |
| if (need_locals) { |
| const char* descriptor = GetMethodDeclaringClassDescriptor(GetMethodId(method_idx)); |
| local_in_reg[arg_reg].name_ = "this"; |
| local_in_reg[arg_reg].descriptor_ = descriptor; |
| local_in_reg[arg_reg].signature_ = NULL; |
| local_in_reg[arg_reg].start_address_ = 0; |
| local_in_reg[arg_reg].is_live_ = true; |
| } |
| arg_reg++; |
| } |
| |
| DexFileParameterIterator it(*this, GetMethodPrototype(GetMethodId(method_idx))); |
| for (uint32_t i = 0; i < parameters_size && it.HasNext(); ++i, it.Next()) { |
| if (arg_reg >= code_item->registers_size_) { |
| LOG(ERROR) << "invalid stream - arg reg >= reg size (" << arg_reg |
| << " >= " << code_item->registers_size_ << ") in " << GetLocation(); |
| return; |
| } |
| uint32_t id = DecodeUnsignedLeb128P1(&stream); |
| const char* descriptor = it.GetDescriptor(); |
| if (need_locals && id != kDexNoIndex) { |
| const char* name = StringDataByIdx(id); |
| local_in_reg[arg_reg].name_ = name; |
| local_in_reg[arg_reg].descriptor_ = descriptor; |
| local_in_reg[arg_reg].signature_ = NULL; |
| local_in_reg[arg_reg].start_address_ = address; |
| local_in_reg[arg_reg].is_live_ = true; |
| } |
| switch (*descriptor) { |
| case 'D': |
| case 'J': |
| arg_reg += 2; |
| break; |
| default: |
| arg_reg += 1; |
| break; |
| } |
| } |
| |
| if (it.HasNext()) { |
| LOG(ERROR) << "invalid stream - problem with parameter iterator in " << GetLocation(); |
| return; |
| } |
| |
| for (;;) { |
| uint8_t opcode = *stream++; |
| uint16_t reg; |
| uint16_t name_idx; |
| uint16_t descriptor_idx; |
| uint16_t signature_idx = 0; |
| |
| switch (opcode) { |
| case DBG_END_SEQUENCE: |
| return; |
| |
| case DBG_ADVANCE_PC: |
| address += DecodeUnsignedLeb128(&stream); |
| break; |
| |
| case DBG_ADVANCE_LINE: |
| line += DecodeSignedLeb128(&stream); |
| break; |
| |
| case DBG_START_LOCAL: |
| case DBG_START_LOCAL_EXTENDED: |
| reg = DecodeUnsignedLeb128(&stream); |
| if (reg > code_item->registers_size_) { |
| LOG(ERROR) << "invalid stream - reg > reg size (" << reg << " > " |
| << code_item->registers_size_ << ") in " << GetLocation(); |
| return; |
| } |
| |
| name_idx = DecodeUnsignedLeb128P1(&stream); |
| descriptor_idx = DecodeUnsignedLeb128P1(&stream); |
| if (opcode == DBG_START_LOCAL_EXTENDED) { |
| signature_idx = DecodeUnsignedLeb128P1(&stream); |
| } |
| |
| // Emit what was previously there, if anything |
| if (need_locals) { |
| InvokeLocalCbIfLive(context, reg, address, local_in_reg, local_cb); |
| |
| local_in_reg[reg].name_ = StringDataByIdx(name_idx); |
| local_in_reg[reg].descriptor_ = StringByTypeIdx(descriptor_idx); |
| if (opcode == DBG_START_LOCAL_EXTENDED) { |
| local_in_reg[reg].signature_ = StringDataByIdx(signature_idx); |
| } |
| local_in_reg[reg].start_address_ = address; |
| local_in_reg[reg].is_live_ = true; |
| } |
| break; |
| |
| case DBG_END_LOCAL: |
| reg = DecodeUnsignedLeb128(&stream); |
| if (reg > code_item->registers_size_) { |
| LOG(ERROR) << "invalid stream - reg > reg size (" << reg << " > " |
| << code_item->registers_size_ << ") in " << GetLocation(); |
| return; |
| } |
| |
| if (need_locals) { |
| InvokeLocalCbIfLive(context, reg, address, local_in_reg, local_cb); |
| local_in_reg[reg].is_live_ = false; |
| } |
| break; |
| |
| case DBG_RESTART_LOCAL: |
| reg = DecodeUnsignedLeb128(&stream); |
| if (reg > code_item->registers_size_) { |
| LOG(ERROR) << "invalid stream - reg > reg size (" << reg << " > " |
| << code_item->registers_size_ << ") in " << GetLocation(); |
| return; |
| } |
| |
| if (need_locals) { |
| if (local_in_reg[reg].name_ == NULL || local_in_reg[reg].descriptor_ == NULL) { |
| LOG(ERROR) << "invalid stream - no name or descriptor in " << GetLocation(); |
| return; |
| } |
| |
| // If the register is live, the "restart" is superfluous, |
| // and we don't want to mess with the existing start address. |
| if (!local_in_reg[reg].is_live_) { |
| local_in_reg[reg].start_address_ = address; |
| local_in_reg[reg].is_live_ = true; |
| } |
| } |
| break; |
| |
| case DBG_SET_PROLOGUE_END: |
| case DBG_SET_EPILOGUE_BEGIN: |
| case DBG_SET_FILE: |
| break; |
| |
| default: { |
| int adjopcode = opcode - DBG_FIRST_SPECIAL; |
| |
| address += adjopcode / DBG_LINE_RANGE; |
| line += DBG_LINE_BASE + (adjopcode % DBG_LINE_RANGE); |
| |
| if (position_cb != NULL) { |
| if (position_cb(context, address, line)) { |
| // early exit |
| return; |
| } |
| } |
| break; |
| } |
| } |
| } |
| } |
| |
| void DexFile::DecodeDebugInfo(const CodeItem* code_item, bool is_static, uint32_t method_idx, |
| DexDebugNewPositionCb position_cb, DexDebugNewLocalCb local_cb, |
| void* context) const { |
| const byte* stream = GetDebugInfoStream(code_item); |
| UniquePtr<LocalInfo[]> local_in_reg(local_cb != NULL ? new LocalInfo[code_item->registers_size_] : NULL); |
| if (stream != NULL) { |
| DecodeDebugInfo0(code_item, is_static, method_idx, position_cb, local_cb, context, stream, &local_in_reg[0]); |
| } |
| for (int reg = 0; reg < code_item->registers_size_; reg++) { |
| InvokeLocalCbIfLive(context, reg, code_item->insns_size_in_code_units_, &local_in_reg[0], local_cb); |
| } |
| } |
| |
| bool DexFile::LineNumForPcCb(void* raw_context, uint32_t address, uint32_t line_num) { |
| LineNumFromPcContext* context = reinterpret_cast<LineNumFromPcContext*>(raw_context); |
| |
| // We know that this callback will be called in |
| // ascending address order, so keep going until we find |
| // a match or we've just gone past it. |
| if (address > context->address_) { |
| // The line number from the previous positions callback |
| // wil be the final result. |
| return true; |
| } else { |
| context->line_num_ = line_num; |
| return address == context->address_; |
| } |
| } |
| |
| // Decodes the header section from the class data bytes. |
| void ClassDataItemIterator::ReadClassDataHeader() { |
| CHECK(ptr_pos_ != NULL); |
| header_.static_fields_size_ = DecodeUnsignedLeb128(&ptr_pos_); |
| header_.instance_fields_size_ = DecodeUnsignedLeb128(&ptr_pos_); |
| header_.direct_methods_size_ = DecodeUnsignedLeb128(&ptr_pos_); |
| header_.virtual_methods_size_ = DecodeUnsignedLeb128(&ptr_pos_); |
| } |
| |
| void ClassDataItemIterator::ReadClassDataField() { |
| field_.field_idx_delta_ = DecodeUnsignedLeb128(&ptr_pos_); |
| field_.access_flags_ = DecodeUnsignedLeb128(&ptr_pos_); |
| if (last_idx_ != 0 && field_.field_idx_delta_ == 0) { |
| LOG(WARNING) << "Duplicate field " << PrettyField(GetMemberIndex(), dex_file_) |
| << " in " << dex_file_.GetLocation(); |
| } |
| } |
| |
| void ClassDataItemIterator::ReadClassDataMethod() { |
| method_.method_idx_delta_ = DecodeUnsignedLeb128(&ptr_pos_); |
| method_.access_flags_ = DecodeUnsignedLeb128(&ptr_pos_); |
| method_.code_off_ = DecodeUnsignedLeb128(&ptr_pos_); |
| if (last_idx_ != 0 && method_.method_idx_delta_ == 0) { |
| LOG(WARNING) << "Duplicate method " << PrettyMethod(GetMemberIndex(), dex_file_) |
| << " in " << dex_file_.GetLocation(); |
| } |
| } |
| |
| // Read a signed integer. "zwidth" is the zero-based byte count. |
| static int32_t ReadSignedInt(const byte* ptr, int zwidth) { |
| int32_t val = 0; |
| for (int i = zwidth; i >= 0; --i) { |
| val = ((uint32_t)val >> 8) | (((int32_t)*ptr++) << 24); |
| } |
| val >>= (3 - zwidth) * 8; |
| return val; |
| } |
| |
| // Read an unsigned integer. "zwidth" is the zero-based byte count, |
| // "fill_on_right" indicates which side we want to zero-fill from. |
| static uint32_t ReadUnsignedInt(const byte* ptr, int zwidth, bool fill_on_right) { |
| uint32_t val = 0; |
| if (!fill_on_right) { |
| for (int i = zwidth; i >= 0; --i) { |
| val = (val >> 8) | (((uint32_t)*ptr++) << 24); |
| } |
| val >>= (3 - zwidth) * 8; |
| } else { |
| for (int i = zwidth; i >= 0; --i) { |
| val = (val >> 8) | (((uint32_t)*ptr++) << 24); |
| } |
| } |
| return val; |
| } |
| |
| // Read a signed long. "zwidth" is the zero-based byte count. |
| static int64_t ReadSignedLong(const byte* ptr, int zwidth) { |
| int64_t val = 0; |
| for (int i = zwidth; i >= 0; --i) { |
| val = ((uint64_t)val >> 8) | (((int64_t)*ptr++) << 56); |
| } |
| val >>= (7 - zwidth) * 8; |
| return val; |
| } |
| |
| // Read an unsigned long. "zwidth" is the zero-based byte count, |
| // "fill_on_right" indicates which side we want to zero-fill from. |
| static uint64_t ReadUnsignedLong(const byte* ptr, int zwidth, bool fill_on_right) { |
| uint64_t val = 0; |
| if (!fill_on_right) { |
| for (int i = zwidth; i >= 0; --i) { |
| val = (val >> 8) | (((uint64_t)*ptr++) << 56); |
| } |
| val >>= (7 - zwidth) * 8; |
| } else { |
| for (int i = zwidth; i >= 0; --i) { |
| val = (val >> 8) | (((uint64_t)*ptr++) << 56); |
| } |
| } |
| return val; |
| } |
| |
| EncodedStaticFieldValueIterator::EncodedStaticFieldValueIterator(const DexFile& dex_file, |
| mirror::DexCache* dex_cache, |
| mirror::ClassLoader* class_loader, |
| ClassLinker* linker, |
| const DexFile::ClassDef& class_def) |
| : dex_file_(dex_file), dex_cache_(dex_cache), class_loader_(class_loader), linker_(linker), |
| array_size_(), pos_(-1), type_(kByte) { |
| ptr_ = dex_file.GetEncodedStaticFieldValuesArray(class_def); |
| if (ptr_ == NULL) { |
| array_size_ = 0; |
| } else { |
| array_size_ = DecodeUnsignedLeb128(&ptr_); |
| } |
| if (array_size_ > 0) { |
| Next(); |
| } |
| } |
| |
| void EncodedStaticFieldValueIterator::Next() { |
| pos_++; |
| if (pos_ >= array_size_) { |
| return; |
| } |
| byte value_type = *ptr_++; |
| byte value_arg = value_type >> kEncodedValueArgShift; |
| size_t width = value_arg + 1; // assume and correct later |
| type_ = static_cast<ValueType>(value_type & kEncodedValueTypeMask); |
| switch (type_) { |
| case kBoolean: |
| jval_.i = (value_arg != 0) ? 1 : 0; |
| width = 0; |
| break; |
| case kByte: |
| jval_.i = ReadSignedInt(ptr_, value_arg); |
| CHECK(IsInt(8, jval_.i)); |
| break; |
| case kShort: |
| jval_.i = ReadSignedInt(ptr_, value_arg); |
| CHECK(IsInt(16, jval_.i)); |
| break; |
| case kChar: |
| jval_.i = ReadUnsignedInt(ptr_, value_arg, false); |
| CHECK(IsUint(16, jval_.i)); |
| break; |
| case kInt: |
| jval_.i = ReadSignedInt(ptr_, value_arg); |
| break; |
| case kLong: |
| jval_.j = ReadSignedLong(ptr_, value_arg); |
| break; |
| case kFloat: |
| jval_.i = ReadUnsignedInt(ptr_, value_arg, true); |
| break; |
| case kDouble: |
| jval_.j = ReadUnsignedLong(ptr_, value_arg, true); |
| break; |
| case kString: |
| case kType: |
| jval_.i = ReadUnsignedInt(ptr_, value_arg, false); |
| break; |
| case kField: |
| case kMethod: |
| case kEnum: |
| case kArray: |
| case kAnnotation: |
| UNIMPLEMENTED(FATAL) << ": type " << type_; |
| break; |
| case kNull: |
| jval_.l = NULL; |
| width = 0; |
| break; |
| default: |
| LOG(FATAL) << "Unreached"; |
| } |
| ptr_ += width; |
| } |
| |
| void EncodedStaticFieldValueIterator::ReadValueToField(mirror::Field* field) const { |
| switch (type_) { |
| case kBoolean: field->SetBoolean(field->GetDeclaringClass(), jval_.z); break; |
| case kByte: field->SetByte(field->GetDeclaringClass(), jval_.b); break; |
| case kShort: field->SetShort(field->GetDeclaringClass(), jval_.s); break; |
| case kChar: field->SetChar(field->GetDeclaringClass(), jval_.c); break; |
| case kInt: field->SetInt(field->GetDeclaringClass(), jval_.i); break; |
| case kLong: field->SetLong(field->GetDeclaringClass(), jval_.j); break; |
| case kFloat: field->SetFloat(field->GetDeclaringClass(), jval_.f); break; |
| case kDouble: field->SetDouble(field->GetDeclaringClass(), jval_.d); break; |
| case kNull: field->SetObject(field->GetDeclaringClass(), NULL); break; |
| case kString: { |
| mirror::String* resolved = linker_->ResolveString(dex_file_, jval_.i, dex_cache_); |
| field->SetObject(field->GetDeclaringClass(), resolved); |
| break; |
| } |
| case kType: { |
| mirror::Class* resolved = linker_->ResolveType(dex_file_, jval_.i, dex_cache_, class_loader_); |
| field->SetObject(field->GetDeclaringClass(), resolved); |
| break; |
| } |
| default: UNIMPLEMENTED(FATAL) << ": type " << type_; |
| } |
| } |
| |
| CatchHandlerIterator::CatchHandlerIterator(const DexFile::CodeItem& code_item, uint32_t address) { |
| handler_.address_ = -1; |
| int32_t offset = -1; |
| |
| // Short-circuit the overwhelmingly common cases. |
| switch (code_item.tries_size_) { |
| case 0: |
| break; |
| case 1: { |
| const DexFile::TryItem* tries = DexFile::GetTryItems(code_item, 0); |
| uint32_t start = tries->start_addr_; |
| if (address >= start) { |
| uint32_t end = start + tries->insn_count_; |
| if (address < end) { |
| offset = tries->handler_off_; |
| } |
| } |
| break; |
| } |
| default: |
| offset = DexFile::FindCatchHandlerOffset(code_item, code_item.tries_size_, address); |
| } |
| Init(code_item, offset); |
| } |
| |
| CatchHandlerIterator::CatchHandlerIterator(const DexFile::CodeItem& code_item, |
| const DexFile::TryItem& try_item) { |
| handler_.address_ = -1; |
| Init(code_item, try_item.handler_off_); |
| } |
| |
| void CatchHandlerIterator::Init(const DexFile::CodeItem& code_item, |
| int32_t offset) { |
| if (offset >= 0) { |
| Init(DexFile::GetCatchHandlerData(code_item, offset)); |
| } else { |
| // Not found, initialize as empty |
| current_data_ = NULL; |
| remaining_count_ = -1; |
| catch_all_ = false; |
| DCHECK(!HasNext()); |
| } |
| } |
| |
| void CatchHandlerIterator::Init(const byte* handler_data) { |
| current_data_ = handler_data; |
| remaining_count_ = DecodeSignedLeb128(¤t_data_); |
| |
| // If remaining_count_ is non-positive, then it is the negative of |
| // the number of catch types, and the catches are followed by a |
| // catch-all handler. |
| if (remaining_count_ <= 0) { |
| catch_all_ = true; |
| remaining_count_ = -remaining_count_; |
| } else { |
| catch_all_ = false; |
| } |
| Next(); |
| } |
| |
| void CatchHandlerIterator::Next() { |
| if (remaining_count_ > 0) { |
| handler_.type_idx_ = DecodeUnsignedLeb128(¤t_data_); |
| handler_.address_ = DecodeUnsignedLeb128(¤t_data_); |
| remaining_count_--; |
| return; |
| } |
| |
| if (catch_all_) { |
| handler_.type_idx_ = DexFile::kDexNoIndex16; |
| handler_.address_ = DecodeUnsignedLeb128(¤t_data_); |
| catch_all_ = false; |
| return; |
| } |
| |
| // no more handler |
| remaining_count_ = -1; |
| } |
| |
| } // namespace art |
