fuquan/allwinner_a64
1
1
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
allwinner_a64/android/art/runtime/dex_file.h
August b9e30e05b1 upload android base code part3
2018-08-08 16:48:17 +08:00

1643 lines
57 KiB
C++
Raw Blame History

/*
* 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.
*/
#ifndef ART_RUNTIME_DEX_FILE_H_
#define ART_RUNTIME_DEX_FILE_H_
#include <memory>
#include <string>
#include <vector>
#include "base/logging.h"
#include "base/value_object.h"
#include "dex_file_types.h"
#include "globals.h"
#include "invoke_type.h"
#include "jni.h"
#include "modifiers.h"
namespace art {
class MemMap;
class OatDexFile;
class Signature;
class StringPiece;
class ZipArchive;
class DexFile {
public:
// First Dex format version supporting default methods.
static const uint32_t kDefaultMethodsVersion = 37;
// First Dex format version enforcing class definition ordering rules.
static const uint32_t kClassDefinitionOrderEnforcedVersion = 37;
static const uint8_t kDexMagic[];
static constexpr size_t kNumDexVersions = 3;
static constexpr size_t kDexVersionLen = 4;
static const uint8_t kDexMagicVersions[kNumDexVersions][kDexVersionLen];
static constexpr size_t kSha1DigestSize = 20;
static constexpr uint32_t kDexEndianConstant = 0x12345678;
// name of the DexFile entry within a zip archive
static const char* kClassesDex;
// The value of an invalid index.
static const uint32_t kDexNoIndex = 0xFFFFFFFF;
// The value of an invalid index.
static const uint16_t kDexNoIndex16 = 0xFFFF;
// The separator character in MultiDex locations.
static constexpr char kMultiDexSeparator = '!';
// A string version of the previous. This is a define so that we can merge string literals in the
// preprocessor.
#define kMultiDexSeparatorString "!"
// Raw header_item.
struct Header {
uint8_t magic_[8];
uint32_t checksum_; // See also location_checksum_
uint8_t signature_[kSha1DigestSize];
uint32_t file_size_; // size of entire file
uint32_t header_size_; // offset to start of next section
uint32_t endian_tag_;
uint32_t link_size_; // unused
uint32_t link_off_; // unused
uint32_t map_off_; // unused
uint32_t string_ids_size_; // number of StringIds
uint32_t string_ids_off_; // file offset of StringIds array
uint32_t type_ids_size_; // number of TypeIds, we don't support more than 65535
uint32_t type_ids_off_; // file offset of TypeIds array
uint32_t proto_ids_size_; // number of ProtoIds, we don't support more than 65535
uint32_t proto_ids_off_; // file offset of ProtoIds array
uint32_t field_ids_size_; // number of FieldIds
uint32_t field_ids_off_; // file offset of FieldIds array
uint32_t method_ids_size_; // number of MethodIds
uint32_t method_ids_off_; // file offset of MethodIds array
uint32_t class_defs_size_; // number of ClassDefs
uint32_t class_defs_off_; // file offset of ClassDef array
uint32_t data_size_; // size of data section
uint32_t data_off_; // file offset of data section
// Decode the dex magic version
uint32_t GetVersion() const;
private:
DISALLOW_COPY_AND_ASSIGN(Header);
};
// Map item type codes.
enum MapItemType : uint16_t { // private
kDexTypeHeaderItem = 0x0000,
kDexTypeStringIdItem = 0x0001,
kDexTypeTypeIdItem = 0x0002,
kDexTypeProtoIdItem = 0x0003,
kDexTypeFieldIdItem = 0x0004,
kDexTypeMethodIdItem = 0x0005,
kDexTypeClassDefItem = 0x0006,
kDexTypeCallSiteIdItem = 0x0007,
kDexTypeMethodHandleItem = 0x0008,
kDexTypeMapList = 0x1000,
kDexTypeTypeList = 0x1001,
kDexTypeAnnotationSetRefList = 0x1002,
kDexTypeAnnotationSetItem = 0x1003,
kDexTypeClassDataItem = 0x2000,
kDexTypeCodeItem = 0x2001,
kDexTypeStringDataItem = 0x2002,
kDexTypeDebugInfoItem = 0x2003,
kDexTypeAnnotationItem = 0x2004,
kDexTypeEncodedArrayItem = 0x2005,
kDexTypeAnnotationsDirectoryItem = 0x2006,
};
struct MapItem {
uint16_t type_;
uint16_t unused_;
uint32_t size_;
uint32_t offset_;
private:
DISALLOW_COPY_AND_ASSIGN(MapItem);
};
struct MapList {
uint32_t size_;
MapItem list_[1];
private:
DISALLOW_COPY_AND_ASSIGN(MapList);
};
// Raw string_id_item.
struct StringId {
uint32_t string_data_off_; // offset in bytes from the base address
private:
DISALLOW_COPY_AND_ASSIGN(StringId);
};
// Raw type_id_item.
struct TypeId {
dex::StringIndex descriptor_idx_; // index into string_ids
private:
DISALLOW_COPY_AND_ASSIGN(TypeId);
};
// Raw field_id_item.
struct FieldId {
dex::TypeIndex class_idx_; // index into type_ids_ array for defining class
dex::TypeIndex type_idx_; // index into type_ids_ array for field type
dex::StringIndex name_idx_; // index into string_ids_ array for field name
private:
DISALLOW_COPY_AND_ASSIGN(FieldId);
};
// Raw proto_id_item.
struct ProtoId {
dex::StringIndex shorty_idx_; // index into string_ids array for shorty descriptor
dex::TypeIndex return_type_idx_; // index into type_ids array for return type
uint16_t pad_; // padding = 0
uint32_t parameters_off_; // file offset to type_list for parameter types
private:
DISALLOW_COPY_AND_ASSIGN(ProtoId);
};
// Raw method_id_item.
struct MethodId {
dex::TypeIndex class_idx_; // index into type_ids_ array for defining class
uint16_t proto_idx_; // index into proto_ids_ array for method prototype
dex::StringIndex name_idx_; // index into string_ids_ array for method name
private:
DISALLOW_COPY_AND_ASSIGN(MethodId);
};
// Raw class_def_item.
struct ClassDef {
dex::TypeIndex class_idx_; // index into type_ids_ array for this class
uint16_t pad1_; // padding = 0
uint32_t access_flags_;
dex::TypeIndex superclass_idx_; // index into type_ids_ array for superclass
uint16_t pad2_; // padding = 0
uint32_t interfaces_off_; // file offset to TypeList
dex::StringIndex source_file_idx_; // index into string_ids_ for source file name
uint32_t annotations_off_; // file offset to annotations_directory_item
uint32_t class_data_off_; // file offset to class_data_item
uint32_t static_values_off_; // file offset to EncodedArray
// Returns the valid access flags, that is, Java modifier bits relevant to the ClassDef type
// (class or interface). These are all in the lower 16b and do not contain runtime flags.
uint32_t GetJavaAccessFlags() const {
// Make sure that none of our runtime-only flags are set.
static_assert((kAccValidClassFlags & kAccJavaFlagsMask) == kAccValidClassFlags,
"Valid class flags not a subset of Java flags");
static_assert((kAccValidInterfaceFlags & kAccJavaFlagsMask) == kAccValidInterfaceFlags,
"Valid interface flags not a subset of Java flags");
if ((access_flags_ & kAccInterface) != 0) {
// Interface.
return access_flags_ & kAccValidInterfaceFlags;
} else {
// Class.
return access_flags_ & kAccValidClassFlags;
}
}
private:
DISALLOW_COPY_AND_ASSIGN(ClassDef);
};
// Raw type_item.
struct TypeItem {
dex::TypeIndex type_idx_; // index into type_ids section
private:
DISALLOW_COPY_AND_ASSIGN(TypeItem);
};
// Raw type_list.
class TypeList {
public:
uint32_t Size() const {
return size_;
}
const TypeItem& GetTypeItem(uint32_t idx) const {
DCHECK_LT(idx, this->size_);
return this->list_[idx];
}
// Size in bytes of the part of the list that is common.
static constexpr size_t GetHeaderSize() {
return 4U;
}
// Size in bytes of the whole type list including all the stored elements.
static constexpr size_t GetListSize(size_t count) {
return GetHeaderSize() + sizeof(TypeItem) * count;
}
private:
uint32_t size_; // size of the list, in entries
TypeItem list_[1]; // elements of the list
DISALLOW_COPY_AND_ASSIGN(TypeList);
};
// MethodHandle Types
enum class MethodHandleType : uint16_t { // private
kStaticPut = 0x0000, // a setter for a given static field.
kStaticGet = 0x0001, // a getter for a given static field.
kInstancePut = 0x0002, // a setter for a given instance field.
kInstanceGet = 0x0003, // a getter for a given instance field.
kInvokeStatic = 0x0004, // an invoker for a given static method.
kInvokeInstance = 0x0005, // invoke_instance : an invoker for a given instance method. This
// can be any non-static method on any class (or interface) except
// for “<init>”.
kInvokeConstructor = 0x0006, // an invoker for a given constructor.
kInvokeDirect = 0x0007, // an invoker for a direct (special) method.
kInvokeInterface = 0x0008, // an invoker for an interface method.
kLast = kInvokeInterface
};
// raw method_handle_item
struct MethodHandleItem {
uint16_t method_handle_type_;
uint16_t reserved1_; // Reserved for future use.
uint16_t field_or_method_idx_; // Field index for accessors, method index otherwise.
uint16_t reserved2_; // Reserved for future use.
private:
DISALLOW_COPY_AND_ASSIGN(MethodHandleItem);
};
// raw call_site_id_item
struct CallSiteIdItem {
uint32_t data_off_; // Offset into data section pointing to encoded array items.
private:
DISALLOW_COPY_AND_ASSIGN(CallSiteIdItem);
};
// Raw code_item.
struct CodeItem {
uint16_t registers_size_; // the number of registers used by this code
// (locals + parameters)
uint16_t ins_size_; // the number of words of incoming arguments to the method
// that this code is for
uint16_t outs_size_; // the number of words of outgoing argument space required
// by this code for method invocation
uint16_t tries_size_; // the number of try_items for this instance. If non-zero,
// then these appear as the tries array just after the
// insns in this instance.
uint32_t debug_info_off_; // file offset to debug info stream
uint32_t insns_size_in_code_units_; // size of the insns array, in 2 byte code units
uint16_t insns_[1]; // actual array of bytecode.
private:
DISALLOW_COPY_AND_ASSIGN(CodeItem);
};
// Raw try_item.
struct TryItem {
uint32_t start_addr_;
uint16_t insn_count_;
uint16_t handler_off_;
private:
DISALLOW_COPY_AND_ASSIGN(TryItem);
};
// Annotation constants.
enum {
kDexVisibilityBuild = 0x00, /* annotation visibility */
kDexVisibilityRuntime = 0x01,
kDexVisibilitySystem = 0x02,
kDexAnnotationByte = 0x00,
kDexAnnotationShort = 0x02,
kDexAnnotationChar = 0x03,
kDexAnnotationInt = 0x04,
kDexAnnotationLong = 0x06,
kDexAnnotationFloat = 0x10,
kDexAnnotationDouble = 0x11,
kDexAnnotationMethodType = 0x15,
kDexAnnotationMethodHandle = 0x16,
kDexAnnotationString = 0x17,
kDexAnnotationType = 0x18,
kDexAnnotationField = 0x19,
kDexAnnotationMethod = 0x1a,
kDexAnnotationEnum = 0x1b,
kDexAnnotationArray = 0x1c,
kDexAnnotationAnnotation = 0x1d,
kDexAnnotationNull = 0x1e,
kDexAnnotationBoolean = 0x1f,
kDexAnnotationValueTypeMask = 0x1f, /* low 5 bits */
kDexAnnotationValueArgShift = 5,
};
struct AnnotationsDirectoryItem {
uint32_t class_annotations_off_;
uint32_t fields_size_;
uint32_t methods_size_;
uint32_t parameters_size_;
private:
DISALLOW_COPY_AND_ASSIGN(AnnotationsDirectoryItem);
};
struct FieldAnnotationsItem {
uint32_t field_idx_;
uint32_t annotations_off_;
private:
DISALLOW_COPY_AND_ASSIGN(FieldAnnotationsItem);
};
struct MethodAnnotationsItem {
uint32_t method_idx_;
uint32_t annotations_off_;
private:
DISALLOW_COPY_AND_ASSIGN(MethodAnnotationsItem);
};
struct ParameterAnnotationsItem {
uint32_t method_idx_;
uint32_t annotations_off_;
private:
DISALLOW_COPY_AND_ASSIGN(ParameterAnnotationsItem);
};
struct AnnotationSetRefItem {
uint32_t annotations_off_;
private:
DISALLOW_COPY_AND_ASSIGN(AnnotationSetRefItem);
};
struct AnnotationSetRefList {
uint32_t size_;
AnnotationSetRefItem list_[1];
private:
DISALLOW_COPY_AND_ASSIGN(AnnotationSetRefList);
};
struct AnnotationSetItem {
uint32_t size_;
uint32_t entries_[1];
private:
DISALLOW_COPY_AND_ASSIGN(AnnotationSetItem);
};
struct AnnotationItem {
uint8_t visibility_;
uint8_t annotation_[1];
private:
DISALLOW_COPY_AND_ASSIGN(AnnotationItem);
};
enum AnnotationResultStyle { // private
kAllObjects,
kPrimitivesOrObjects,
kAllRaw
};
struct AnnotationValue;
// Returns the checksums of a file for comparison with GetLocationChecksum().
// For .dex files, this is the single header checksum.
// For zip files, this is the zip entry CRC32 checksum for classes.dex and
// each additional multidex entry classes2.dex, classes3.dex, etc.
// Return true if the checksums could be found, false otherwise.
static bool GetMultiDexChecksums(const char* filename,
std::vector<uint32_t>* checksums,
std::string* error_msg);
// Check whether a location denotes a multidex dex file. This is a very simple check: returns
// whether the string contains the separator character.
static bool IsMultiDexLocation(const char* location);
// Opens .dex file, backed by existing memory
static std::unique_ptr<const DexFile> Open(const uint8_t* base,
size_t size,
const std::string& location,
uint32_t location_checksum,
const OatDexFile* oat_dex_file,
bool verify,
bool verify_checksum,
std::string* error_msg);
// Opens .dex file that has been memory-mapped by the caller.
static std::unique_ptr<const DexFile> Open(const std::string& location,
uint32_t location_checkum,
std::unique_ptr<MemMap> mem_map,
bool verify,
bool verify_checksum,
std::string* error_msg);
// Opens all .dex files found in the file, guessing the container format based on file extension.
static bool Open(const char* filename,
const std::string& location,
bool verify_checksum,
std::string* error_msg,
std::vector<std::unique_ptr<const DexFile>>* dex_files);
// Open a single dex file from an fd.
static std::unique_ptr<const DexFile> OpenDex(int fd,
const std::string& location,
bool verify_checksum,
std::string* error_msg);
// Opens dex files from within a .jar, .zip, or .apk file
static bool OpenZip(int fd,
const std::string& location,
bool verify_checksum,
std::string* error_msg,
std::vector<std::unique_ptr<const DexFile>>* dex_files);
// Closes a .dex file.
virtual ~DexFile();
const std::string& GetLocation() const {
return location_;
}
// For normal dex files, location and base location coincide. If a dex file is part of a multidex
// archive, the base location is the name of the originating jar/apk, stripped of any internal
// classes*.dex path.
static std::string GetBaseLocation(const char* location) {
const char* pos = strrchr(location, kMultiDexSeparator);
if (pos == nullptr) {
return location;
} else {
return std::string(location, pos - location);
}
}
static std::string GetBaseLocation(const std::string& location) {
return GetBaseLocation(location.c_str());
}
// Returns the '!classes*.dex' part of the dex location. Returns an empty
// string if there is no multidex suffix for the given location.
// The kMultiDexSeparator is included in the returned suffix.
static std::string GetMultiDexSuffix(const std::string& location) {
size_t pos = location.rfind(kMultiDexSeparator);
if (pos == std::string::npos) {
return "";
} else {
return location.substr(pos);
}
}
std::string GetBaseLocation() const {
return GetBaseLocation(location_);
}
// For DexFiles directly from .dex files, this is the checksum from the DexFile::Header.
// For DexFiles opened from a zip files, this will be the ZipEntry CRC32 of classes.dex.
uint32_t GetLocationChecksum() const {
return location_checksum_;
}
const Header& GetHeader() const {
DCHECK(header_ != nullptr) << GetLocation();
return *header_;
}
// Decode the dex magic version
uint32_t GetVersion() const {
return GetHeader().GetVersion();
}
// Returns true if the byte string points to the magic value.
static bool IsMagicValid(const uint8_t* magic);
// Returns true if the byte string after the magic is the correct value.
static bool IsVersionValid(const uint8_t* magic);
// Returns the number of string identifiers in the .dex file.
size_t NumStringIds() const {
DCHECK(header_ != nullptr) << GetLocation();
return header_->string_ids_size_;
}
// Returns the StringId at the specified index.
const StringId& GetStringId(dex::StringIndex idx) const {
DCHECK_LT(idx.index_, NumStringIds()) << GetLocation();
return string_ids_[idx.index_];
}
dex::StringIndex GetIndexForStringId(const StringId& string_id) const {
CHECK_GE(&string_id, string_ids_) << GetLocation();
CHECK_LT(&string_id, string_ids_ + header_->string_ids_size_) << GetLocation();
return dex::StringIndex(&string_id - string_ids_);
}
int32_t GetStringLength(const StringId& string_id) const;
// Returns a pointer to the UTF-8 string data referred to by the given string_id as well as the
// length of the string when decoded as a UTF-16 string. Note the UTF-16 length is not the same
// as the string length of the string data.
const char* GetStringDataAndUtf16Length(const StringId& string_id, uint32_t* utf16_length) const;
const char* GetStringData(const StringId& string_id) const;
// Index version of GetStringDataAndUtf16Length.
const char* StringDataAndUtf16LengthByIdx(dex::StringIndex idx, uint32_t* utf16_length) const;
const char* StringDataByIdx(dex::StringIndex idx) const;
// Looks up a string id for a given modified utf8 string.
const StringId* FindStringId(const char* string) const;
const TypeId* FindTypeId(const char* string) const;
// Looks up a string id for a given utf16 string.
const StringId* FindStringId(const uint16_t* string, size_t length) const;
// Returns the number of type identifiers in the .dex file.
uint32_t NumTypeIds() const {
DCHECK(header_ != nullptr) << GetLocation();
return header_->type_ids_size_;
}
bool IsTypeIndexValid(dex::TypeIndex idx) const {
return idx.IsValid() && idx.index_ < NumTypeIds();
}
// Returns the TypeId at the specified index.
const TypeId& GetTypeId(dex::TypeIndex idx) const {
DCHECK_LT(idx.index_, NumTypeIds()) << GetLocation();
return type_ids_[idx.index_];
}
dex::TypeIndex GetIndexForTypeId(const TypeId& type_id) const {
CHECK_GE(&type_id, type_ids_) << GetLocation();
CHECK_LT(&type_id, type_ids_ + header_->type_ids_size_) << GetLocation();
size_t result = &type_id - type_ids_;
DCHECK_LT(result, 65536U) << GetLocation();
return dex::TypeIndex(static_cast<uint16_t>(result));
}
// Get the descriptor string associated with a given type index.
const char* StringByTypeIdx(dex::TypeIndex idx, uint32_t* unicode_length) const;
const char* StringByTypeIdx(dex::TypeIndex idx) const;
// Returns the type descriptor string of a type id.
const char* GetTypeDescriptor(const TypeId& type_id) const;
// Looks up a type for the given string index
const TypeId* FindTypeId(dex::StringIndex string_idx) const;
// Returns the number of field identifiers in the .dex file.
size_t NumFieldIds() const {
DCHECK(header_ != nullptr) << GetLocation();
return header_->field_ids_size_;
}
// Returns the FieldId at the specified index.
const FieldId& GetFieldId(uint32_t idx) const {
DCHECK_LT(idx, NumFieldIds()) << GetLocation();
return field_ids_[idx];
}
uint32_t GetIndexForFieldId(const FieldId& field_id) const {
CHECK_GE(&field_id, field_ids_) << GetLocation();
CHECK_LT(&field_id, field_ids_ + header_->field_ids_size_) << GetLocation();
return &field_id - field_ids_;
}
// Looks up a field by its declaring class, name and type
const FieldId* FindFieldId(const DexFile::TypeId& declaring_klass,
const DexFile::StringId& name,
const DexFile::TypeId& type) const;
uint32_t FindCodeItemOffset(const DexFile::ClassDef& class_def,
uint32_t dex_method_idx) const;
static uint32_t GetCodeItemSize(const DexFile::CodeItem& disk_code_item);
// Returns the declaring class descriptor string of a field id.
const char* GetFieldDeclaringClassDescriptor(const FieldId& field_id) const {
const DexFile::TypeId& type_id = GetTypeId(field_id.class_idx_);
return GetTypeDescriptor(type_id);
}
// Returns the class descriptor string of a field id.
const char* GetFieldTypeDescriptor(const FieldId& field_id) const;
// Returns the name of a field id.
const char* GetFieldName(const FieldId& field_id) const;
// Returns the number of method identifiers in the .dex file.
size_t NumMethodIds() const {
DCHECK(header_ != nullptr) << GetLocation();
return header_->method_ids_size_;
}
// Returns the MethodId at the specified index.
const MethodId& GetMethodId(uint32_t idx) const {
DCHECK_LT(idx, NumMethodIds()) << GetLocation();
return method_ids_[idx];
}
uint32_t GetIndexForMethodId(const MethodId& method_id) const {
CHECK_GE(&method_id, method_ids_) << GetLocation();
CHECK_LT(&method_id, method_ids_ + header_->method_ids_size_) << GetLocation();
return &method_id - method_ids_;
}
// Looks up a method by its declaring class, name and proto_id
const MethodId* FindMethodId(const DexFile::TypeId& declaring_klass,
const DexFile::StringId& name,
const DexFile::ProtoId& signature) const;
// Returns the declaring class descriptor string of a method id.
const char* GetMethodDeclaringClassDescriptor(const MethodId& method_id) const;
// Returns the prototype of a method id.
const ProtoId& GetMethodPrototype(const MethodId& method_id) const {
return GetProtoId(method_id.proto_idx_);
}
// Returns a representation of the signature of a method id.
const Signature GetMethodSignature(const MethodId& method_id) const;
// Returns a representation of the signature of a proto id.
const Signature GetProtoSignature(const ProtoId& proto_id) const;
// Returns the name of a method id.
const char* GetMethodName(const MethodId& method_id) const;
// Returns the shorty of a method by its index.
const char* GetMethodShorty(uint32_t idx) const;
// Returns the shorty of a method id.
const char* GetMethodShorty(const MethodId& method_id) const;
const char* GetMethodShorty(const MethodId& method_id, uint32_t* length) const;
// Returns the number of class definitions in the .dex file.
uint32_t NumClassDefs() const {
DCHECK(header_ != nullptr) << GetLocation();
return header_->class_defs_size_;
}
// Returns the ClassDef at the specified index.
const ClassDef& GetClassDef(uint16_t idx) const {
DCHECK_LT(idx, NumClassDefs()) << GetLocation();
return class_defs_[idx];
}
uint16_t GetIndexForClassDef(const ClassDef& class_def) const {
CHECK_GE(&class_def, class_defs_) << GetLocation();
CHECK_LT(&class_def, class_defs_ + header_->class_defs_size_) << GetLocation();
return &class_def - class_defs_;
}
// Returns the class descriptor string of a class definition.
const char* GetClassDescriptor(const ClassDef& class_def) const;
// Looks up a class definition by its type index.
const ClassDef* FindClassDef(dex::TypeIndex type_idx) const;
const TypeList* GetInterfacesList(const ClassDef& class_def) const {
if (class_def.interfaces_off_ == 0) {
return nullptr;
} else {
const uint8_t* addr = begin_ + class_def.interfaces_off_;
return reinterpret_cast<const TypeList*>(addr);
}
}
uint32_t NumMethodHandles() const {
return num_method_handles_;
}
const MethodHandleItem& GetMethodHandle(uint32_t idx) const {
CHECK_LT(idx, NumMethodHandles());
return method_handles_[idx];
}
uint32_t NumCallSiteIds() const {
return num_call_site_ids_;
}
const CallSiteIdItem& GetCallSiteId(uint32_t idx) const {
CHECK_LT(idx, NumCallSiteIds());
return call_site_ids_[idx];
}
// Returns a pointer to the raw memory mapped class_data_item
const uint8_t* GetClassData(const ClassDef& class_def) const {
if (class_def.class_data_off_ == 0) {
return nullptr;
} else {
return begin_ + class_def.class_data_off_;
}
}
//
const CodeItem* GetCodeItem(const uint32_t code_off) const {
DCHECK_LT(code_off, size_) << "Code item offset larger then maximum allowed offset";
if (code_off == 0) {
return nullptr; // native or abstract method
} else {
const uint8_t* addr = begin_ + code_off;
return reinterpret_cast<const CodeItem*>(addr);
}
}
const char* GetReturnTypeDescriptor(const ProtoId& proto_id) const;
// Returns the number of prototype identifiers in the .dex file.
size_t NumProtoIds() const {
DCHECK(header_ != nullptr) << GetLocation();
return header_->proto_ids_size_;
}
// Returns the ProtoId at the specified index.
const ProtoId& GetProtoId(uint16_t idx) const {
DCHECK_LT(idx, NumProtoIds()) << GetLocation();
return proto_ids_[idx];
}
uint16_t GetIndexForProtoId(const ProtoId& proto_id) const {
CHECK_GE(&proto_id, proto_ids_) << GetLocation();
CHECK_LT(&proto_id, proto_ids_ + header_->proto_ids_size_) << GetLocation();
return &proto_id - proto_ids_;
}
// Looks up a proto id for a given return type and signature type list
const ProtoId* FindProtoId(dex::TypeIndex return_type_idx,
const dex::TypeIndex* signature_type_idxs,
uint32_t signature_length) const;
const ProtoId* FindProtoId(dex::TypeIndex return_type_idx,
const std::vector<dex::TypeIndex>& signature_type_idxs) const {
return FindProtoId(return_type_idx, &signature_type_idxs[0], signature_type_idxs.size());
}
// Given a signature place the type ids into the given vector, returns true on success
bool CreateTypeList(const StringPiece& signature,
dex::TypeIndex* return_type_idx,
std::vector<dex::TypeIndex>* param_type_idxs) const;
// Create a Signature from the given string signature or return Signature::NoSignature if not
// possible.
const Signature CreateSignature(const StringPiece& signature) const;
// Returns the short form method descriptor for the given prototype.
const char* GetShorty(uint32_t proto_idx) const;
const TypeList* GetProtoParameters(const ProtoId& proto_id) const {
if (proto_id.parameters_off_ == 0) {
return nullptr;
} else {
const uint8_t* addr = begin_ + proto_id.parameters_off_;
return reinterpret_cast<const TypeList*>(addr);
}
}
const uint8_t* GetEncodedStaticFieldValuesArray(const ClassDef& class_def) const {
if (class_def.static_values_off_ == 0) {
return 0;
} else {
return begin_ + class_def.static_values_off_;
}
}
const uint8_t* GetCallSiteEncodedValuesArray(const CallSiteIdItem& call_site_id) const {
return begin_ + call_site_id.data_off_;
}
static const TryItem* GetTryItems(const CodeItem& code_item, uint32_t offset);
// Get the base of the encoded data for the given DexCode.
static const uint8_t* GetCatchHandlerData(const CodeItem& code_item, uint32_t offset) {
const uint8_t* handler_data =
reinterpret_cast<const uint8_t*>(GetTryItems(code_item, code_item.tries_size_));
return handler_data + offset;
}
// Find which try region is associated with the given address (ie dex pc). Returns -1 if none.
static int32_t FindTryItem(const CodeItem &code_item, uint32_t address);
// Find the handler offset associated with the given address (ie dex pc). Returns -1 if none.
static int32_t FindCatchHandlerOffset(const CodeItem &code_item, uint32_t address);
// Get the pointer to the start of the debugging data
const uint8_t* GetDebugInfoStream(const CodeItem* code_item) const {
// Check that the offset is in bounds.
// Note that although the specification says that 0 should be used if there
// is no debug information, some applications incorrectly use 0xFFFFFFFF.
if (code_item->debug_info_off_ == 0 || code_item->debug_info_off_ >= size_) {
return nullptr;
} else {
return begin_ + code_item->debug_info_off_;
}
}
struct PositionInfo {
PositionInfo()
: address_(0),
line_(0),
source_file_(nullptr),
prologue_end_(false),
epilogue_begin_(false) {
}
uint32_t address_; // In 16-bit code units.
uint32_t line_; // Source code line number starting at 1.
const char* source_file_; // nullptr if the file from ClassDef still applies.
bool prologue_end_;
bool epilogue_begin_;
};
// Callback for "new position table entry".
// Returning true causes the decoder to stop early.
typedef bool (*DexDebugNewPositionCb)(void* context, const PositionInfo& entry);
struct LocalInfo {
LocalInfo()
: name_(nullptr),
descriptor_(nullptr),
signature_(nullptr),
start_address_(0),
end_address_(0),
reg_(0),
is_live_(false) {
}
const char* name_; // E.g., list. It can be nullptr if unknown.
const char* descriptor_; // E.g., Ljava/util/LinkedList;
const char* signature_; // E.g., java.util.LinkedList<java.lang.Integer>
uint32_t start_address_; // PC location where the local is first defined.
uint32_t end_address_; // PC location where the local is no longer defined.
uint16_t reg_; // Dex register which stores the values.
bool is_live_; // Is the local defined and live.
};
// Callback for "new locals table entry".
typedef void (*DexDebugNewLocalCb)(void* context, const LocalInfo& entry);
static bool LineNumForPcCb(void* context, const PositionInfo& entry);
const AnnotationsDirectoryItem* GetAnnotationsDirectory(const ClassDef& class_def) const {
if (class_def.annotations_off_ == 0) {
return nullptr;
} else {
return reinterpret_cast<const AnnotationsDirectoryItem*>(begin_ + class_def.annotations_off_);
}
}
const AnnotationSetItem* GetClassAnnotationSet(const AnnotationsDirectoryItem* anno_dir) const {
if (anno_dir->class_annotations_off_ == 0) {
return nullptr;
} else {
return reinterpret_cast<const AnnotationSetItem*>(begin_ + anno_dir->class_annotations_off_);
}
}
const FieldAnnotationsItem* GetFieldAnnotations(const AnnotationsDirectoryItem* anno_dir) const {
if (anno_dir->fields_size_ == 0) {
return nullptr;
} else {
return reinterpret_cast<const FieldAnnotationsItem*>(&anno_dir[1]);
}
}
const MethodAnnotationsItem* GetMethodAnnotations(const AnnotationsDirectoryItem* anno_dir)
const {
if (anno_dir->methods_size_ == 0) {
return nullptr;
} else {
// Skip past the header and field annotations.
const uint8_t* addr = reinterpret_cast<const uint8_t*>(&anno_dir[1]);
addr += anno_dir->fields_size_ * sizeof(FieldAnnotationsItem);
return reinterpret_cast<const MethodAnnotationsItem*>(addr);
}
}
const ParameterAnnotationsItem* GetParameterAnnotations(const AnnotationsDirectoryItem* anno_dir)
const {
if (anno_dir->parameters_size_ == 0) {
return nullptr;
} else {
// Skip past the header, field annotations, and method annotations.
const uint8_t* addr = reinterpret_cast<const uint8_t*>(&anno_dir[1]);
addr += anno_dir->fields_size_ * sizeof(FieldAnnotationsItem);
addr += anno_dir->methods_size_ * sizeof(MethodAnnotationsItem);
return reinterpret_cast<const ParameterAnnotationsItem*>(addr);
}
}
const AnnotationSetItem* GetFieldAnnotationSetItem(const FieldAnnotationsItem& anno_item) const {
uint32_t offset = anno_item.annotations_off_;
if (offset == 0) {
return nullptr;
} else {
return reinterpret_cast<const AnnotationSetItem*>(begin_ + offset);
}
}
const AnnotationSetItem* GetMethodAnnotationSetItem(const MethodAnnotationsItem& anno_item)
const {
uint32_t offset = anno_item.annotations_off_;
if (offset == 0) {
return nullptr;
} else {
return reinterpret_cast<const AnnotationSetItem*>(begin_ + offset);
}
}
const AnnotationSetRefList* GetParameterAnnotationSetRefList(
const ParameterAnnotationsItem* anno_item) const {
uint32_t offset = anno_item->annotations_off_;
if (offset == 0) {
return nullptr;
}
return reinterpret_cast<const AnnotationSetRefList*>(begin_ + offset);
}
const AnnotationItem* GetAnnotationItem(const AnnotationSetItem* set_item, uint32_t index) const {
DCHECK_LE(index, set_item->size_);
uint32_t offset = set_item->entries_[index];
if (offset == 0) {
return nullptr;
} else {
return reinterpret_cast<const AnnotationItem*>(begin_ + offset);
}
}
const AnnotationSetItem* GetSetRefItemItem(const AnnotationSetRefItem* anno_item) const {
uint32_t offset = anno_item->annotations_off_;
if (offset == 0) {
return nullptr;
}
return reinterpret_cast<const AnnotationSetItem*>(begin_ + offset);
}
// Debug info opcodes and constants
enum {
DBG_END_SEQUENCE = 0x00,
DBG_ADVANCE_PC = 0x01,
DBG_ADVANCE_LINE = 0x02,
DBG_START_LOCAL = 0x03,
DBG_START_LOCAL_EXTENDED = 0x04,
DBG_END_LOCAL = 0x05,
DBG_RESTART_LOCAL = 0x06,
DBG_SET_PROLOGUE_END = 0x07,
DBG_SET_EPILOGUE_BEGIN = 0x08,
DBG_SET_FILE = 0x09,
DBG_FIRST_SPECIAL = 0x0a,
DBG_LINE_BASE = -4,
DBG_LINE_RANGE = 15,
};
struct LineNumFromPcContext {
LineNumFromPcContext(uint32_t address, uint32_t line_num)
: address_(address), line_num_(line_num) {}
uint32_t address_;
uint32_t line_num_;
private:
DISALLOW_COPY_AND_ASSIGN(LineNumFromPcContext);
};
// Returns false if there is no debugging information or if it cannot be decoded.
bool DecodeDebugLocalInfo(const CodeItem* code_item, bool is_static, uint32_t method_idx,
DexDebugNewLocalCb local_cb, void* context) const;
// Returns false if there is no debugging information or if it cannot be decoded.
bool DecodeDebugPositionInfo(const CodeItem* code_item, DexDebugNewPositionCb position_cb,
void* context) const;
const char* GetSourceFile(const ClassDef& class_def) const {
if (!class_def.source_file_idx_.IsValid()) {
return nullptr;
} else {
return StringDataByIdx(class_def.source_file_idx_);
}
}
int GetPermissions() const;
bool IsReadOnly() const;
bool EnableWrite() const;
bool DisableWrite() const;
const uint8_t* Begin() const {
return begin_;
}
size_t Size() const {
return size_;
}
// Return the name of the index-th classes.dex in a multidex zip file. This is classes.dex for
// index == 0, and classes{index + 1}.dex else.
static std::string GetMultiDexClassesDexName(size_t index);
// Return the (possibly synthetic) dex location for a multidex entry. This is dex_location for
// index == 0, and dex_location + multi-dex-separator + GetMultiDexClassesDexName(index) else.
static std::string GetMultiDexLocation(size_t index, const char* dex_location);
// Returns the canonical form of the given dex location.
//
// There are different flavors of "dex locations" as follows:
// the file name of a dex file:
// The actual file path that the dex file has on disk.
// dex_location:
// This acts as a key for the class linker to know which dex file to load.
// It may correspond to either an old odex file or a particular dex file
// inside an oat file. In the first case it will also match the file name
// of the dex file. In the second case (oat) it will include the file name
// and possibly some multidex annotation to uniquely identify it.
// canonical_dex_location:
// the dex_location where it's file name part has been made canonical.
static std::string GetDexCanonicalLocation(const char* dex_location);
const OatDexFile* GetOatDexFile() const {
return oat_dex_file_;
}
// Used by oat writer.
void SetOatDexFile(OatDexFile* oat_dex_file) const {
oat_dex_file_ = oat_dex_file;
}
// Utility methods for reading integral values from a buffer.
static int32_t ReadSignedInt(const uint8_t* ptr, int zwidth);
static uint32_t ReadUnsignedInt(const uint8_t* ptr, int zwidth, bool fill_on_right);
static int64_t ReadSignedLong(const uint8_t* ptr, int zwidth);
static uint64_t ReadUnsignedLong(const uint8_t* ptr, int zwidth, bool fill_on_right);
// Recalculates the checksum of the dex file. Does not use the current value in the header.
uint32_t CalculateChecksum() const;
// Returns a human-readable form of the method at an index.
std::string PrettyMethod(uint32_t method_idx, bool with_signature = true) const;
// Returns a human-readable form of the field at an index.
std::string PrettyField(uint32_t field_idx, bool with_type = true) const;
// Returns a human-readable form of the type at an index.
std::string PrettyType(dex::TypeIndex type_idx) const;
private:
static std::unique_ptr<const DexFile> OpenFile(int fd,
const std::string& location,
bool verify,
bool verify_checksum,
std::string* error_msg);
enum class ZipOpenErrorCode { // private
kNoError,
kEntryNotFound,
kExtractToMemoryError,
kDexFileError,
kMakeReadOnlyError,
kVerifyError
};
// Open all classesXXX.dex files from a zip archive.
static bool OpenAllDexFilesFromZip(const ZipArchive& zip_archive,
const std::string& location,
bool verify_checksum,
std::string* error_msg,
std::vector<std::unique_ptr<const DexFile>>* dex_files);
// Opens .dex file from the entry_name in a zip archive. error_code is undefined when non-null
// return.
static std::unique_ptr<const DexFile> OpenOneDexFileFromZip(const ZipArchive& zip_archive,
const char* entry_name,
const std::string& location,
bool verify_checksum,
std::string* error_msg,
ZipOpenErrorCode* error_code);
enum class VerifyResult { // private
kVerifyNotAttempted,
kVerifySucceeded,
kVerifyFailed
};
static std::unique_ptr<DexFile> OpenCommon(const uint8_t* base,
size_t size,
const std::string& location,
uint32_t location_checksum,
const OatDexFile* oat_dex_file,
bool verify,
bool verify_checksum,
std::string* error_msg,
VerifyResult* verify_result = nullptr);
// Opens a .dex file at the given address, optionally backed by a MemMap
static std::unique_ptr<const DexFile> OpenMemory(const uint8_t* dex_file,
size_t size,
const std::string& location,
uint32_t location_checksum,
std::unique_ptr<MemMap> mem_map,
const OatDexFile* oat_dex_file,
std::string* error_msg);
DexFile(const uint8_t* base,
size_t size,
const std::string& location,
uint32_t location_checksum,
const OatDexFile* oat_dex_file);
// Top-level initializer that calls other Init methods.
bool Init(std::string* error_msg);
// Returns true if the header magic and version numbers are of the expected values.
bool CheckMagicAndVersion(std::string* error_msg) const;
// Initialize section info for sections only found in map. Returns true on success.
void InitializeSectionsFromMapList();
// The base address of the memory mapping.
const uint8_t* const begin_;
// The size of the underlying memory allocation in bytes.
const size_t size_;
// Typically the dex file name when available, alternatively some identifying string.
//
// The ClassLinker will use this to match DexFiles the boot class
// path to DexCache::GetLocation when loading from an image.
const std::string location_;
const uint32_t location_checksum_;
// Manages the underlying memory allocation.
std::unique_ptr<MemMap> mem_map_;
// Points to the header section.
const Header* const header_;
// Points to the base of the string identifier list.
const StringId* const string_ids_;
// Points to the base of the type identifier list.
const TypeId* const type_ids_;
// Points to the base of the field identifier list.
const FieldId* const field_ids_;
// Points to the base of the method identifier list.
const MethodId* const method_ids_;
// Points to the base of the prototype identifier list.
const ProtoId* const proto_ids_;
// Points to the base of the class definition list.
const ClassDef* const class_defs_;
// Points to the base of the method handles list.
const MethodHandleItem* method_handles_;
// Number of elements in the method handles list.
size_t num_method_handles_;
// Points to the base of the call sites id list.
const CallSiteIdItem* call_site_ids_;
// Number of elements in the call sites list.
size_t num_call_site_ids_;
// If this dex file was loaded from an oat file, oat_dex_file_ contains a
// pointer to the OatDexFile it was loaded from. Otherwise oat_dex_file_ is
// null.
mutable const OatDexFile* oat_dex_file_;
friend class DexFileVerifierTest;
friend class OatWriter;
ART_FRIEND_TEST(ClassLinkerTest, RegisterDexFileName); // for constructor
};
struct DexFileReference {
DexFileReference(const DexFile* file, uint32_t idx) : dex_file(file), index(idx) { }
const DexFile* dex_file;
uint32_t index;
};
std::ostream& operator<<(std::ostream& os, const DexFile& dex_file);
// Iterate over a dex file's ProtoId's paramters
class DexFileParameterIterator {
public:
DexFileParameterIterator(const DexFile& dex_file, const DexFile::ProtoId& proto_id)
: dex_file_(dex_file), size_(0), pos_(0) {
type_list_ = dex_file_.GetProtoParameters(proto_id);
if (type_list_ != nullptr) {
size_ = type_list_->Size();
}
}
bool HasNext() const { return pos_ < size_; }
size_t Size() const { return size_; }
void Next() { ++pos_; }
dex::TypeIndex GetTypeIdx() {
return type_list_->GetTypeItem(pos_).type_idx_;
}
const char* GetDescriptor() {
return dex_file_.StringByTypeIdx(dex::TypeIndex(GetTypeIdx()));
}
private:
const DexFile& dex_file_;
const DexFile::TypeList* type_list_;
uint32_t size_;
uint32_t pos_;
DISALLOW_IMPLICIT_CONSTRUCTORS(DexFileParameterIterator);
};
// Abstract the signature of a method.
class Signature : public ValueObject {
public:
std::string ToString() const;
static Signature NoSignature() {
return Signature();
}
bool IsVoid() const;
uint32_t GetNumberOfParameters() const;
bool operator==(const Signature& rhs) const;
bool operator!=(const Signature& rhs) const {
return !(*this == rhs);
}
bool operator==(const StringPiece& rhs) const;
private:
Signature(const DexFile* dex, const DexFile::ProtoId& proto) : dex_file_(dex), proto_id_(&proto) {
}
Signature() : dex_file_(nullptr), proto_id_(nullptr) {
}
friend class DexFile;
const DexFile* const dex_file_;
const DexFile::ProtoId* const proto_id_;
};
std::ostream& operator<<(std::ostream& os, const Signature& sig);
// Iterate and decode class_data_item
class ClassDataItemIterator {
public:
ClassDataItemIterator(const DexFile& dex_file, const uint8_t* raw_class_data_item)
: dex_file_(dex_file), pos_(0), ptr_pos_(raw_class_data_item), last_idx_(0) {
ReadClassDataHeader();
if (EndOfInstanceFieldsPos() > 0) {
ReadClassDataField();
} else if (EndOfVirtualMethodsPos() > 0) {
ReadClassDataMethod();
}
}
uint32_t NumStaticFields() const {
return header_.static_fields_size_;
}
uint32_t NumInstanceFields() const {
return header_.instance_fields_size_;
}
uint32_t NumDirectMethods() const {
return header_.direct_methods_size_;
}
uint32_t NumVirtualMethods() const {
return header_.virtual_methods_size_;
}
bool IsAtMethod() const {
return pos_ >= EndOfInstanceFieldsPos();
}
bool HasNextStaticField() const {
return pos_ < EndOfStaticFieldsPos();
}
bool HasNextInstanceField() const {
return pos_ >= EndOfStaticFieldsPos() && pos_ < EndOfInstanceFieldsPos();
}
bool HasNextDirectMethod() const {
return pos_ >= EndOfInstanceFieldsPos() && pos_ < EndOfDirectMethodsPos();
}
bool HasNextVirtualMethod() const {
return pos_ >= EndOfDirectMethodsPos() && pos_ < EndOfVirtualMethodsPos();
}
void SkipStaticFields() {
while (HasNextStaticField()) {
Next();
}
}
void SkipInstanceFields() {
while (HasNextInstanceField()) {
Next();
}
}
void SkipAllFields() {
SkipStaticFields();
SkipInstanceFields();
}
void SkipDirectMethods() {
while (HasNextDirectMethod()) {
Next();
}
}
void SkipVirtualMethods() {
while (HasNextVirtualMethod()) {
Next();
}
}
bool HasNext() const {
return pos_ < EndOfVirtualMethodsPos();
}
inline void Next() {
pos_++;
if (pos_ < EndOfStaticFieldsPos()) {
last_idx_ = GetMemberIndex();
ReadClassDataField();
} else if (pos_ == EndOfStaticFieldsPos() && NumInstanceFields() > 0) {
last_idx_ = 0; // transition to next array, reset last index
ReadClassDataField();
} else if (pos_ < EndOfInstanceFieldsPos()) {
last_idx_ = GetMemberIndex();
ReadClassDataField();
} else if (pos_ == EndOfInstanceFieldsPos() && NumDirectMethods() > 0) {
last_idx_ = 0; // transition to next array, reset last index
ReadClassDataMethod();
} else if (pos_ < EndOfDirectMethodsPos()) {
last_idx_ = GetMemberIndex();
ReadClassDataMethod();
} else if (pos_ == EndOfDirectMethodsPos() && NumVirtualMethods() > 0) {
last_idx_ = 0; // transition to next array, reset last index
ReadClassDataMethod();
} else if (pos_ < EndOfVirtualMethodsPos()) {
last_idx_ = GetMemberIndex();
ReadClassDataMethod();
} else {
DCHECK(!HasNext());
}
}
uint32_t GetMemberIndex() const {
if (pos_ < EndOfInstanceFieldsPos()) {
return last_idx_ + field_.field_idx_delta_;
} else {
DCHECK_LT(pos_, EndOfVirtualMethodsPos());
return last_idx_ + method_.method_idx_delta_;
}
}
uint32_t GetRawMemberAccessFlags() const {
if (pos_ < EndOfInstanceFieldsPos()) {
return field_.access_flags_;
} else {
DCHECK_LT(pos_, EndOfVirtualMethodsPos());
return method_.access_flags_;
}
}
uint32_t GetFieldAccessFlags() const {
return GetRawMemberAccessFlags() & kAccValidFieldFlags;
}
uint32_t GetMethodAccessFlags() const {
return GetRawMemberAccessFlags() & kAccValidMethodFlags;
}
bool MemberIsNative() const {
return GetRawMemberAccessFlags() & kAccNative;
}
bool MemberIsFinal() const {
return GetRawMemberAccessFlags() & kAccFinal;
}
InvokeType GetMethodInvokeType(const DexFile::ClassDef& class_def) const {
if (HasNextDirectMethod()) {
if ((GetRawMemberAccessFlags() & kAccStatic) != 0) {
return kStatic;
} else {
return kDirect;
}
} else {
DCHECK_EQ(GetRawMemberAccessFlags() & kAccStatic, 0U);
if ((class_def.access_flags_ & kAccInterface) != 0) {
return kInterface;
} else if ((GetRawMemberAccessFlags() & kAccConstructor) != 0) {
return kSuper;
} else {
return kVirtual;
}
}
}
const DexFile::CodeItem* GetMethodCodeItem() const {
return dex_file_.GetCodeItem(method_.code_off_);
}
uint32_t GetMethodCodeItemOffset() const {
return method_.code_off_;
}
const uint8_t* DataPointer() const {
return ptr_pos_;
}
const uint8_t* EndDataPointer() const {
CHECK(!HasNext());
return ptr_pos_;
}
private:
// A dex file's class_data_item is leb128 encoded, this structure holds a decoded form of the
// header for a class_data_item
struct ClassDataHeader {
uint32_t static_fields_size_; // the number of static fields
uint32_t instance_fields_size_; // the number of instance fields
uint32_t direct_methods_size_; // the number of direct methods
uint32_t virtual_methods_size_; // the number of virtual methods
} header_;
// Read and decode header from a class_data_item stream into header
void ReadClassDataHeader();
uint32_t EndOfStaticFieldsPos() const {
return header_.static_fields_size_;
}
uint32_t EndOfInstanceFieldsPos() const {
return EndOfStaticFieldsPos() + header_.instance_fields_size_;
}
uint32_t EndOfDirectMethodsPos() const {
return EndOfInstanceFieldsPos() + header_.direct_methods_size_;
}
uint32_t EndOfVirtualMethodsPos() const {
return EndOfDirectMethodsPos() + header_.virtual_methods_size_;
}
// A decoded version of the field of a class_data_item
struct ClassDataField {
uint32_t field_idx_delta_; // delta of index into the field_ids array for FieldId
uint32_t access_flags_; // access flags for the field
ClassDataField() : field_idx_delta_(0), access_flags_(0) {}
private:
DISALLOW_COPY_AND_ASSIGN(ClassDataField);
};
ClassDataField field_;
// Read and decode a field from a class_data_item stream into field
void ReadClassDataField();
// A decoded version of the method of a class_data_item
struct ClassDataMethod {
uint32_t method_idx_delta_; // delta of index into the method_ids array for MethodId
uint32_t access_flags_;
uint32_t code_off_;
ClassDataMethod() : method_idx_delta_(0), access_flags_(0), code_off_(0) {}
private:
DISALLOW_COPY_AND_ASSIGN(ClassDataMethod);
};
ClassDataMethod method_;
// Read and decode a method from a class_data_item stream into method
void ReadClassDataMethod();
const DexFile& dex_file_;
size_t pos_; // integral number of items passed
const uint8_t* ptr_pos_; // pointer into stream of class_data_item
uint32_t last_idx_; // last read field or method index to apply delta to
DISALLOW_IMPLICIT_CONSTRUCTORS(ClassDataItemIterator);
};
class EncodedArrayValueIterator {
public:
EncodedArrayValueIterator(const DexFile& dex_file, const uint8_t* array_data);
bool HasNext() const { return pos_ < array_size_; }
void Next();
enum ValueType {
kByte = 0x00,
kShort = 0x02,
kChar = 0x03,
kInt = 0x04,
kLong = 0x06,
kFloat = 0x10,
kDouble = 0x11,
kMethodType = 0x15,
kMethodHandle = 0x16,
kString = 0x17,
kType = 0x18,
kField = 0x19,
kMethod = 0x1a,
kEnum = 0x1b,
kArray = 0x1c,
kAnnotation = 0x1d,
kNull = 0x1e,
kBoolean = 0x1f,
};
ValueType GetValueType() const { return type_; }
const jvalue& GetJavaValue() const { return jval_; }
protected:
static constexpr uint8_t kEncodedValueTypeMask = 0x1f; // 0b11111
static constexpr uint8_t kEncodedValueArgShift = 5;
const DexFile& dex_file_;
size_t array_size_; // Size of array.
size_t pos_; // Current position.
const uint8_t* ptr_; // Pointer into encoded data array.
ValueType type_; // Type of current encoded value.
jvalue jval_; // Value of current encoded value.
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(EncodedArrayValueIterator);
};
std::ostream& operator<<(std::ostream& os, const EncodedArrayValueIterator::ValueType& code);
class EncodedStaticFieldValueIterator : public EncodedArrayValueIterator {
public:
EncodedStaticFieldValueIterator(const DexFile& dex_file,
const DexFile::ClassDef& class_def)
: EncodedArrayValueIterator(dex_file,
dex_file.GetEncodedStaticFieldValuesArray(class_def))
{}
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(EncodedStaticFieldValueIterator);
};
std::ostream& operator<<(std::ostream& os, const EncodedStaticFieldValueIterator::ValueType& code);
class CallSiteArrayValueIterator : public EncodedArrayValueIterator {
public:
CallSiteArrayValueIterator(const DexFile& dex_file,
const DexFile::CallSiteIdItem& call_site_id)
: EncodedArrayValueIterator(dex_file,
dex_file.GetCallSiteEncodedValuesArray(call_site_id))
{}
uint32_t Size() const { return array_size_; }
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(CallSiteArrayValueIterator);
};
std::ostream& operator<<(std::ostream& os, const CallSiteArrayValueIterator::ValueType& code);
class CatchHandlerIterator {
public:
CatchHandlerIterator(const DexFile::CodeItem& code_item, uint32_t address);
CatchHandlerIterator(const DexFile::CodeItem& code_item,
const DexFile::TryItem& try_item);
explicit CatchHandlerIterator(const uint8_t* handler_data) {
Init(handler_data);
}
dex::TypeIndex GetHandlerTypeIndex() const {
return handler_.type_idx_;
}
uint32_t GetHandlerAddress() const {
return handler_.address_;
}
void Next();
bool HasNext() const {
return remaining_count_ != -1 || catch_all_;
}
// End of this set of catch blocks, convenience method to locate next set of catch blocks
const uint8_t* EndDataPointer() const {
CHECK(!HasNext());
return current_data_;
}
private:
void Init(const DexFile::CodeItem& code_item, int32_t offset);
void Init(const uint8_t* handler_data);
struct CatchHandlerItem {
dex::TypeIndex type_idx_; // type index of the caught exception type
uint32_t address_; // handler address
} handler_;
const uint8_t* current_data_; // the current handler in dex file.
int32_t remaining_count_; // number of handlers not read.
bool catch_all_; // is there a handler that will catch all exceptions in case
// that all typed handler does not match.
};
} // namespace art
#endif // ART_RUNTIME_DEX_FILE_H_
Reference in a new issue View git blame Copy permalink