| /* |
| * 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 <limits.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <zlib.h> |
| |
| #include <memory> |
| #include <sstream> |
| #include <type_traits> |
| |
| #include "android-base/stringprintf.h" |
| |
| #include "base/enums.h" |
| #include "base/leb128.h" |
| #include "base/stl_util.h" |
| #include "descriptors_names.h" |
| #include "dex_file-inl.h" |
| #include "standard_dex_file.h" |
| #include "utf-inl.h" |
| |
| namespace art { |
| |
| using android::base::StringPrintf; |
| |
| static_assert(sizeof(dex::StringIndex) == sizeof(uint32_t), "StringIndex size is wrong"); |
| static_assert(std::is_trivially_copyable<dex::StringIndex>::value, "StringIndex not trivial"); |
| static_assert(sizeof(dex::TypeIndex) == sizeof(uint16_t), "TypeIndex size is wrong"); |
| static_assert(std::is_trivially_copyable<dex::TypeIndex>::value, "TypeIndex not trivial"); |
| |
| void DexFile::UnHideAccessFlags(uint8_t* data_ptr, |
| uint32_t new_access_flags, |
| bool is_method) { |
| // Go back 1 uleb to start. |
| data_ptr = ReverseSearchUnsignedLeb128(data_ptr); |
| if (is_method) { |
| // Methods have another uleb field before the access flags |
| data_ptr = ReverseSearchUnsignedLeb128(data_ptr); |
| } |
| DCHECK_EQ(HiddenApiAccessFlags::RemoveFromDex(DecodeUnsignedLeb128WithoutMovingCursor(data_ptr)), |
| new_access_flags); |
| UpdateUnsignedLeb128(data_ptr, new_access_flags); |
| } |
| |
| uint32_t DexFile::CalculateChecksum() const { |
| return CalculateChecksum(Begin(), Size()); |
| } |
| |
| uint32_t DexFile::CalculateChecksum(const uint8_t* begin, size_t size) { |
| const uint32_t non_sum_bytes = OFFSETOF_MEMBER(DexFile::Header, signature_); |
| return ChecksumMemoryRange(begin + non_sum_bytes, size - non_sum_bytes); |
| } |
| |
| uint32_t DexFile::ChecksumMemoryRange(const uint8_t* begin, size_t size) { |
| return adler32(adler32(0L, Z_NULL, 0), begin, size); |
| } |
| |
| int DexFile::GetPermissions() const { |
| CHECK(main_section_ != nullptr); |
| return main_section_->GetPermissions(); |
| } |
| |
| bool DexFile::IsReadOnly() const { |
| CHECK(main_section_ != nullptr); |
| return main_section_->IsReadOnly(); |
| } |
| |
| bool DexFile::EnableWrite() const { |
| CHECK(main_section_ != nullptr); |
| return main_section_->EnableWrite(); |
| } |
| |
| bool DexFile::DisableWrite() const { |
| CHECK(main_section_ != nullptr); |
| return main_section_->DisableWrite(); |
| } |
| |
| DexFile::DexFile(std::unique_ptr<DexFileContainer> main_section, |
| std::unique_ptr<DexFileContainer> data_section, |
| const std::string& location, |
| uint32_t location_checksum, |
| const OatDexFile* oat_dex_file, |
| bool is_compact_dex) |
| : main_section_(std::move(main_section)), |
| location_(location), |
| location_checksum_(location_checksum), |
| header_(reinterpret_cast<const Header*>(main_section_->Begin())), |
| string_ids_(reinterpret_cast<const StringId*>(main_section_->Begin() + |
| header_->string_ids_off_)), |
| type_ids_(reinterpret_cast<const TypeId*>(main_section_->Begin() + header_->type_ids_off_)), |
| field_ids_(reinterpret_cast<const FieldId*>(main_section_->Begin() + |
| header_->field_ids_off_)), |
| method_ids_(reinterpret_cast<const MethodId*>(main_section_->Begin() + |
| header_->method_ids_off_)), |
| proto_ids_(reinterpret_cast<const ProtoId*>(main_section_->Begin() + |
| header_->proto_ids_off_)), |
| class_defs_(reinterpret_cast<const ClassDef*>(main_section_->Begin() + |
| header_->class_defs_off_)), |
| method_handles_(nullptr), |
| num_method_handles_(0), |
| call_site_ids_(nullptr), |
| num_call_site_ids_(0), |
| oat_dex_file_(oat_dex_file), |
| is_compact_dex_(is_compact_dex), |
| is_platform_dex_(false) { |
| CHECK(main_section_->Begin() != nullptr) << GetLocation(); |
| CHECK_GT(main_section_->Size(), 0U) << GetLocation(); |
| // Check base (=header) alignment. |
| // Must be 4-byte aligned to avoid undefined behavior when accessing |
| // any of the sections via a pointer. |
| CHECK_ALIGNED(main_section_->Begin(), alignof(Header)); |
| |
| data_section_ = std::move(data_section); |
| |
| InitializeSectionsFromMapList(); |
| } |
| |
| DexFile::DexFile(std::unique_ptr<DexFileContainer> main_section, |
| const std::string& location, |
| uint32_t location_checksum, |
| const OatDexFile* oat_dex_file, |
| bool is_compact_dex) |
| : main_section_(std::move(main_section)), |
| location_(location), |
| location_checksum_(location_checksum), |
| header_(reinterpret_cast<const Header*>(main_section_->Begin())), |
| string_ids_(reinterpret_cast<const StringId*>(main_section_->Begin() + |
| header_->string_ids_off_)), |
| type_ids_(reinterpret_cast<const TypeId*>(main_section_->Begin() + header_->type_ids_off_)), |
| field_ids_(reinterpret_cast<const FieldId*>(main_section_->Begin() + |
| header_->field_ids_off_)), |
| method_ids_(reinterpret_cast<const MethodId*>(main_section_->Begin() + |
| header_->method_ids_off_)), |
| proto_ids_(reinterpret_cast<const ProtoId*>(main_section_->Begin() + |
| header_->proto_ids_off_)), |
| class_defs_(reinterpret_cast<const ClassDef*>(main_section_->Begin() + |
| header_->class_defs_off_)), |
| method_handles_(nullptr), |
| num_method_handles_(0), |
| call_site_ids_(nullptr), |
| num_call_site_ids_(0), |
| oat_dex_file_(oat_dex_file), |
| is_compact_dex_(is_compact_dex), |
| is_platform_dex_(false) { |
| CHECK(main_section_->Begin() != nullptr) << GetLocation(); |
| CHECK_GT(main_section_->Size(), 0U) << GetLocation(); |
| // Check base (=header) alignment. |
| // Must be 4-byte aligned to avoid undefined behavior when accessing |
| // any of the sections via a pointer. |
| CHECK_ALIGNED(main_section_->Begin(), alignof(Header)); |
| |
| data_section_ = std::make_unique<NonOwningDexFileContainer>(main_section_->Begin(), |
| main_section_->Size()); |
| |
| InitializeSectionsFromMapList(); |
| } |
| |
| 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! |
| } |
| |
| bool DexFile::Init(std::string* error_msg) { |
| if (!CheckMagicAndVersion(error_msg)) { |
| return false; |
| } |
| return true; |
| } |
| |
| bool DexFile::CheckMagicAndVersion(std::string* error_msg) const { |
| if (!IsMagicValid()) { |
| std::ostringstream oss; |
| oss << "Unrecognized magic number in " << GetLocation() << ":" |
| << " " << header_->magic_[0] |
| << " " << header_->magic_[1] |
| << " " << header_->magic_[2] |
| << " " << header_->magic_[3]; |
| *error_msg = oss.str(); |
| return false; |
| } |
| if (!IsVersionValid()) { |
| std::ostringstream oss; |
| oss << "Unrecognized version number in " << GetLocation() << ":" |
| << " " << header_->magic_[4] |
| << " " << header_->magic_[5] |
| << " " << header_->magic_[6] |
| << " " << header_->magic_[7]; |
| *error_msg = oss.str(); |
| return false; |
| } |
| return true; |
| } |
| |
| void DexFile::InitializeSectionsFromMapList() { |
| const MapList* map_list = reinterpret_cast<const MapList*>(DataBegin() + header_->map_off_); |
| if (header_->map_off_ == 0 || header_->map_off_ > DataSize()) { |
| // Bad offset. The dex file verifier runs after this method and will reject the file. |
| return; |
| } |
| const size_t count = map_list->size_; |
| |
| size_t map_limit = header_->map_off_ + count * sizeof(MapItem); |
| if (header_->map_off_ >= map_limit || map_limit > DataSize()) { |
| // Overflow or out out of bounds. The dex file verifier runs after |
| // this method and will reject the file as it is malformed. |
| return; |
| } |
| |
| for (size_t i = 0; i < count; ++i) { |
| const MapItem& map_item = map_list->list_[i]; |
| if (map_item.type_ == kDexTypeMethodHandleItem) { |
| method_handles_ = reinterpret_cast<const MethodHandleItem*>(Begin() + map_item.offset_); |
| num_method_handles_ = map_item.size_; |
| } else if (map_item.type_ == kDexTypeCallSiteIdItem) { |
| call_site_ids_ = reinterpret_cast<const CallSiteIdItem*>(Begin() + map_item.offset_); |
| num_call_site_ids_ = map_item.size_; |
| } |
| } |
| } |
| |
| uint32_t DexFile::Header::GetVersion() const { |
| const char* version = reinterpret_cast<const char*>(&magic_[kDexMagicSize]); |
| return atoi(version); |
| } |
| |
| const DexFile::ClassDef* DexFile::FindClassDef(dex::TypeIndex type_idx) const { |
| size_t num_class_defs = NumClassDefs(); |
| // Fast path for rare no class defs case. |
| if (num_class_defs == 0) { |
| return nullptr; |
| } |
| for (size_t i = 0; i < num_class_defs; ++i) { |
| const ClassDef& class_def = GetClassDef(i); |
| if (class_def.class_idx_ == type_idx) { |
| return &class_def; |
| } |
| } |
| return nullptr; |
| } |
| |
| uint32_t DexFile::FindCodeItemOffset(const DexFile::ClassDef& class_def, |
| uint32_t method_idx) const { |
| const uint8_t* class_data = GetClassData(class_def); |
| CHECK(class_data != nullptr); |
| ClassDataItemIterator it(*this, class_data); |
| it.SkipAllFields(); |
| while (it.HasNextDirectMethod()) { |
| if (it.GetMemberIndex() == method_idx) { |
| return it.GetMethodCodeItemOffset(); |
| } |
| it.Next(); |
| } |
| while (it.HasNextVirtualMethod()) { |
| if (it.GetMemberIndex() == method_idx) { |
| return it.GetMethodCodeItemOffset(); |
| } |
| it.Next(); |
| } |
| LOG(FATAL) << "Unable to find method " << method_idx; |
| UNREACHABLE(); |
| } |
| |
| 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 dex::TypeIndex class_idx = GetIndexForTypeId(declaring_klass); |
| const dex::StringIndex name_idx = GetIndexForStringId(name); |
| const dex::TypeIndex type_idx = GetIndexForTypeId(type); |
| int32_t lo = 0; |
| int32_t hi = NumFieldIds() - 1; |
| while (hi >= lo) { |
| int32_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 nullptr; |
| } |
| |
| 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 dex::TypeIndex class_idx = GetIndexForTypeId(declaring_klass); |
| const dex::StringIndex name_idx = GetIndexForStringId(name); |
| const dex::ProtoIndex proto_idx = GetIndexForProtoId(signature); |
| int32_t lo = 0; |
| int32_t hi = NumMethodIds() - 1; |
| while (hi >= lo) { |
| int32_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 nullptr; |
| } |
| |
| const DexFile::StringId* DexFile::FindStringId(const char* string) const { |
| int32_t lo = 0; |
| int32_t hi = NumStringIds() - 1; |
| while (hi >= lo) { |
| int32_t mid = (hi + lo) / 2; |
| const DexFile::StringId& str_id = GetStringId(dex::StringIndex(mid)); |
| const char* str = GetStringData(str_id); |
| int compare = CompareModifiedUtf8ToModifiedUtf8AsUtf16CodePointValues(string, str); |
| if (compare > 0) { |
| lo = mid + 1; |
| } else if (compare < 0) { |
| hi = mid - 1; |
| } else { |
| return &str_id; |
| } |
| } |
| return nullptr; |
| } |
| |
| const DexFile::TypeId* DexFile::FindTypeId(const char* string) const { |
| int32_t lo = 0; |
| int32_t hi = NumTypeIds() - 1; |
| while (hi >= lo) { |
| int32_t mid = (hi + lo) / 2; |
| const TypeId& type_id = GetTypeId(dex::TypeIndex(mid)); |
| const DexFile::StringId& str_id = GetStringId(type_id.descriptor_idx_); |
| const char* str = GetStringData(str_id); |
| int compare = CompareModifiedUtf8ToModifiedUtf8AsUtf16CodePointValues(string, str); |
| if (compare > 0) { |
| lo = mid + 1; |
| } else if (compare < 0) { |
| hi = mid - 1; |
| } else { |
| return &type_id; |
| } |
| } |
| return nullptr; |
| } |
| |
| const DexFile::TypeId* DexFile::FindTypeId(dex::StringIndex string_idx) const { |
| int32_t lo = 0; |
| int32_t hi = NumTypeIds() - 1; |
| while (hi >= lo) { |
| int32_t mid = (hi + lo) / 2; |
| const TypeId& type_id = GetTypeId(dex::TypeIndex(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 nullptr; |
| } |
| |
| const DexFile::ProtoId* DexFile::FindProtoId(dex::TypeIndex return_type_idx, |
| const dex::TypeIndex* signature_type_idxs, |
| uint32_t signature_length) const { |
| int32_t lo = 0; |
| int32_t hi = NumProtoIds() - 1; |
| while (hi >= lo) { |
| int32_t mid = (hi + lo) / 2; |
| const dex::ProtoIndex proto_idx = static_cast<dex::ProtoIndex>(mid); |
| const DexFile::ProtoId& proto = GetProtoId(proto_idx); |
| int compare = return_type_idx.index_ - proto.return_type_idx_.index_; |
| if (compare == 0) { |
| DexFileParameterIterator it(*this, proto); |
| size_t i = 0; |
| while (it.HasNext() && i < signature_length && compare == 0) { |
| compare = signature_type_idxs[i].index_ - it.GetTypeIdx().index_; |
| it.Next(); |
| i++; |
| } |
| if (compare == 0) { |
| if (it.HasNext()) { |
| compare = -1; |
| } else if (i < signature_length) { |
| compare = 1; |
| } |
| } |
| } |
| if (compare > 0) { |
| lo = mid + 1; |
| } else if (compare < 0) { |
| hi = mid - 1; |
| } else { |
| return &proto; |
| } |
| } |
| return nullptr; |
| } |
| |
| // Given a signature place the type ids into the given vector |
| bool DexFile::CreateTypeList(const StringPiece& signature, |
| dex::TypeIndex* return_type_idx, |
| std::vector<dex::TypeIndex>* param_type_idxs) const { |
| if (signature[0] != '(') { |
| return false; |
| } |
| size_t offset = 1; |
| size_t end = signature.size(); |
| bool process_return = false; |
| while (offset < end) { |
| size_t start_offset = offset; |
| char c = signature[offset]; |
| offset++; |
| if (c == ')') { |
| process_return = true; |
| continue; |
| } |
| while (c == '[') { // process array prefix |
| if (offset >= end) { // expect some descriptor following [ |
| return false; |
| } |
| c = signature[offset]; |
| offset++; |
| } |
| if (c == 'L') { // process type descriptors |
| do { |
| if (offset >= end) { // unexpected early termination of descriptor |
| return false; |
| } |
| c = signature[offset]; |
| offset++; |
| } while (c != ';'); |
| } |
| // TODO: avoid creating a std::string just to get a 0-terminated char array |
| std::string descriptor(signature.data() + start_offset, offset - start_offset); |
| const DexFile::TypeId* type_id = FindTypeId(descriptor.c_str()); |
| if (type_id == nullptr) { |
| return false; |
| } |
| dex::TypeIndex 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 |
| } |
| |
| const Signature DexFile::CreateSignature(const StringPiece& signature) const { |
| dex::TypeIndex return_type_idx; |
| std::vector<dex::TypeIndex> param_type_indices; |
| bool success = CreateTypeList(signature, &return_type_idx, ¶m_type_indices); |
| if (!success) { |
| return Signature::NoSignature(); |
| } |
| const ProtoId* proto_id = FindProtoId(return_type_idx, param_type_indices); |
| if (proto_id == nullptr) { |
| return Signature::NoSignature(); |
| } |
| return Signature(this, *proto_id); |
| } |
| |
| int32_t DexFile::FindTryItem(const TryItem* try_items, uint32_t tries_size, uint32_t address) { |
| uint32_t min = 0; |
| uint32_t max = tries_size; |
| while (min < max) { |
| const uint32_t mid = (min + max) / 2; |
| |
| const art::DexFile::TryItem& ti = try_items[mid]; |
| const uint32_t start = ti.start_addr_; |
| const uint32_t end = start + ti.insn_count_; |
| |
| if (address < start) { |
| max = mid; |
| } else if (address >= end) { |
| min = mid + 1; |
| } else { // We have a winner! |
| return mid; |
| } |
| } |
| // No match. |
| return -1; |
| } |
| |
| bool DexFile::LineNumForPcCb(void* raw_context, const PositionInfo& entry) { |
| 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 (entry.address_ > context->address_) { |
| // The line number from the previous positions callback |
| // wil be the final result. |
| return true; |
| } else { |
| context->line_num_ = entry.line_; |
| return entry.address_ == context->address_; |
| } |
| } |
| |
| // Read a signed integer. "zwidth" is the zero-based byte count. |
| int32_t DexFile::ReadSignedInt(const uint8_t* 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. |
| uint32_t DexFile::ReadUnsignedInt(const uint8_t* ptr, int zwidth, bool fill_on_right) { |
| uint32_t val = 0; |
| for (int i = zwidth; i >= 0; --i) { |
| val = (val >> 8) | (((uint32_t)*ptr++) << 24); |
| } |
| if (!fill_on_right) { |
| val >>= (3 - zwidth) * 8; |
| } |
| return val; |
| } |
| |
| // Read a signed long. "zwidth" is the zero-based byte count. |
| int64_t DexFile::ReadSignedLong(const uint8_t* 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. |
| uint64_t DexFile::ReadUnsignedLong(const uint8_t* ptr, int zwidth, bool fill_on_right) { |
| uint64_t val = 0; |
| for (int i = zwidth; i >= 0; --i) { |
| val = (val >> 8) | (((uint64_t)*ptr++) << 56); |
| } |
| if (!fill_on_right) { |
| val >>= (7 - zwidth) * 8; |
| } |
| return val; |
| } |
| |
| std::string DexFile::PrettyMethod(uint32_t method_idx, bool with_signature) const { |
| if (method_idx >= NumMethodIds()) { |
| return StringPrintf("<<invalid-method-idx-%d>>", method_idx); |
| } |
| const DexFile::MethodId& method_id = GetMethodId(method_idx); |
| std::string result; |
| const DexFile::ProtoId* proto_id = with_signature ? &GetProtoId(method_id.proto_idx_) : nullptr; |
| if (with_signature) { |
| AppendPrettyDescriptor(StringByTypeIdx(proto_id->return_type_idx_), &result); |
| result += ' '; |
| } |
| AppendPrettyDescriptor(GetMethodDeclaringClassDescriptor(method_id), &result); |
| result += '.'; |
| result += GetMethodName(method_id); |
| if (with_signature) { |
| result += '('; |
| const DexFile::TypeList* params = GetProtoParameters(*proto_id); |
| if (params != nullptr) { |
| const char* separator = ""; |
| for (uint32_t i = 0u, size = params->Size(); i != size; ++i) { |
| result += separator; |
| separator = ", "; |
| AppendPrettyDescriptor(StringByTypeIdx(params->GetTypeItem(i).type_idx_), &result); |
| } |
| } |
| result += ')'; |
| } |
| return result; |
| } |
| |
| std::string DexFile::PrettyField(uint32_t field_idx, bool with_type) const { |
| if (field_idx >= NumFieldIds()) { |
| return StringPrintf("<<invalid-field-idx-%d>>", field_idx); |
| } |
| const DexFile::FieldId& field_id = GetFieldId(field_idx); |
| std::string result; |
| if (with_type) { |
| result += GetFieldTypeDescriptor(field_id); |
| result += ' '; |
| } |
| AppendPrettyDescriptor(GetFieldDeclaringClassDescriptor(field_id), &result); |
| result += '.'; |
| result += GetFieldName(field_id); |
| return result; |
| } |
| |
| std::string DexFile::PrettyType(dex::TypeIndex type_idx) const { |
| if (type_idx.index_ >= NumTypeIds()) { |
| return StringPrintf("<<invalid-type-idx-%d>>", type_idx.index_); |
| } |
| const DexFile::TypeId& type_id = GetTypeId(type_idx); |
| return PrettyDescriptor(GetTypeDescriptor(type_id)); |
| } |
| |
| dex::ProtoIndex DexFile::GetProtoIndexForCallSite(uint32_t call_site_idx) const { |
| const DexFile::CallSiteIdItem& csi = GetCallSiteId(call_site_idx); |
| CallSiteArrayValueIterator it(*this, csi); |
| it.Next(); |
| it.Next(); |
| DCHECK_EQ(EncodedArrayValueIterator::ValueType::kMethodType, it.GetValueType()); |
| return dex::ProtoIndex(it.GetJavaValue().i); |
| } |
| |
| // Checks that visibility is as expected. Includes special behavior for M and |
| // before to allow runtime and build visibility when expecting runtime. |
| std::ostream& operator<<(std::ostream& os, const DexFile& dex_file) { |
| os << StringPrintf("[DexFile: %s dex-checksum=%08x location-checksum=%08x %p-%p]", |
| dex_file.GetLocation().c_str(), |
| dex_file.GetHeader().checksum_, dex_file.GetLocationChecksum(), |
| dex_file.Begin(), dex_file.Begin() + dex_file.Size()); |
| return os; |
| } |
| |
| std::string Signature::ToString() const { |
| if (dex_file_ == nullptr) { |
| CHECK(proto_id_ == nullptr); |
| return "<no signature>"; |
| } |
| const DexFile::TypeList* params = dex_file_->GetProtoParameters(*proto_id_); |
| std::string result; |
| if (params == nullptr) { |
| result += "()"; |
| } else { |
| result += "("; |
| for (uint32_t i = 0; i < params->Size(); ++i) { |
| result += dex_file_->StringByTypeIdx(params->GetTypeItem(i).type_idx_); |
| } |
| result += ")"; |
| } |
| result += dex_file_->StringByTypeIdx(proto_id_->return_type_idx_); |
| return result; |
| } |
| |
| uint32_t Signature::GetNumberOfParameters() const { |
| const DexFile::TypeList* params = dex_file_->GetProtoParameters(*proto_id_); |
| return (params != nullptr) ? params->Size() : 0; |
| } |
| |
| bool Signature::IsVoid() const { |
| const char* return_type = dex_file_->GetReturnTypeDescriptor(*proto_id_); |
| return strcmp(return_type, "V") == 0; |
| } |
| |
| bool Signature::operator==(const StringPiece& rhs) const { |
| if (dex_file_ == nullptr) { |
| return false; |
| } |
| StringPiece tail(rhs); |
| if (!tail.starts_with("(")) { |
| return false; // Invalid signature |
| } |
| tail.remove_prefix(1); // "("; |
| const DexFile::TypeList* params = dex_file_->GetProtoParameters(*proto_id_); |
| if (params != nullptr) { |
| for (uint32_t i = 0; i < params->Size(); ++i) { |
| StringPiece param(dex_file_->StringByTypeIdx(params->GetTypeItem(i).type_idx_)); |
| if (!tail.starts_with(param)) { |
| return false; |
| } |
| tail.remove_prefix(param.length()); |
| } |
| } |
| if (!tail.starts_with(")")) { |
| return false; |
| } |
| tail.remove_prefix(1); // ")"; |
| return tail == dex_file_->StringByTypeIdx(proto_id_->return_type_idx_); |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const Signature& sig) { |
| return os << sig.ToString(); |
| } |
| |
| // Decodes the header section from the class data bytes. |
| void ClassDataItemIterator::ReadClassDataHeader() { |
| CHECK(ptr_pos_ != nullptr); |
| 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_); |
| // The user of the iterator is responsible for checking if there |
| // are unordered or duplicate indexes. |
| } |
| |
| 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 in " << dex_file_.GetLocation(); |
| } |
| } |
| |
| EncodedArrayValueIterator::EncodedArrayValueIterator(const DexFile& dex_file, |
| const uint8_t* array_data) |
| : dex_file_(dex_file), |
| array_size_(), |
| pos_(-1), |
| ptr_(array_data), |
| type_(kByte) { |
| array_size_ = (ptr_ != nullptr) ? DecodeUnsignedLeb128(&ptr_) : 0; |
| if (array_size_ > 0) { |
| Next(); |
| } |
| } |
| |
| void EncodedArrayValueIterator::Next() { |
| pos_++; |
| if (pos_ >= array_size_) { |
| return; |
| } |
| uint8_t value_type = *ptr_++; |
| uint8_t 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 = DexFile::ReadSignedInt(ptr_, value_arg); |
| CHECK(IsInt<8>(jval_.i)); |
| break; |
| case kShort: |
| jval_.i = DexFile::ReadSignedInt(ptr_, value_arg); |
| CHECK(IsInt<16>(jval_.i)); |
| break; |
| case kChar: |
| jval_.i = DexFile::ReadUnsignedInt(ptr_, value_arg, false); |
| CHECK(IsUint<16>(jval_.i)); |
| break; |
| case kInt: |
| jval_.i = DexFile::ReadSignedInt(ptr_, value_arg); |
| break; |
| case kLong: |
| jval_.j = DexFile::ReadSignedLong(ptr_, value_arg); |
| break; |
| case kFloat: |
| jval_.i = DexFile::ReadUnsignedInt(ptr_, value_arg, true); |
| break; |
| case kDouble: |
| jval_.j = DexFile::ReadUnsignedLong(ptr_, value_arg, true); |
| break; |
| case kString: |
| case kType: |
| case kMethodType: |
| case kMethodHandle: |
| jval_.i = DexFile::ReadUnsignedInt(ptr_, value_arg, false); |
| break; |
| case kField: |
| case kMethod: |
| case kEnum: |
| case kArray: |
| case kAnnotation: |
| UNIMPLEMENTED(FATAL) << ": type " << type_; |
| UNREACHABLE(); |
| case kNull: |
| jval_.l = nullptr; |
| width = 0; |
| break; |
| default: |
| LOG(FATAL) << "Unreached"; |
| UNREACHABLE(); |
| } |
| ptr_ += width; |
| } |
| |
| namespace dex { |
| |
| std::ostream& operator<<(std::ostream& os, const ProtoIndex& index) { |
| os << "ProtoIndex[" << index.index_ << "]"; |
| return os; |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const StringIndex& index) { |
| os << "StringIndex[" << index.index_ << "]"; |
| return os; |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const TypeIndex& index) { |
| os << "TypeIndex[" << index.index_ << "]"; |
| return os; |
| } |
| |
| } // namespace dex |
| |
| } // namespace art |