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/*
* 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_CLASS_LINKER_H_
#define ART_RUNTIME_CLASS_LINKER_H_
#include <string>
#include <utility>
#include <vector>
#include "base/macros.h"
#include "base/mutex.h"
#include "dex_file.h"
#include "gtest/gtest.h"
#include "jni.h"
#include "oat_file.h"
#include "object_callbacks.h"
namespace art {
namespace gc {
namespace space {
class ImageSpace;
} // namespace space
} // namespace gc
namespace mirror {
class ClassLoader;
class DexCache;
class DexCacheTest_Open_Test;
class IfTable;
template<class T> class ObjectArray;
class StackTraceElement;
} // namespace mirror
class InternTable;
template<class T> class ObjectLock;
class ScopedObjectAccess;
template<class T> class SirtRef;
typedef bool (ClassVisitor)(mirror::Class* c, void* arg);
enum VisitRootFlags : uint8_t;
class ClassLinker {
public:
// Interface method table size. Increasing this value reduces the chance of two interface methods
// colliding in the interface method table but increases the size of classes that implement
// (non-marker) interfaces.
static constexpr size_t kImtSize = 64;
explicit ClassLinker(InternTable* intern_table);
~ClassLinker();
// Initialize class linker by bootstraping from dex files
void InitFromCompiler(const std::vector<const DexFile*>& boot_class_path)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Initialize class linker from one or more images.
void InitFromImage() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool IsInBootClassPath(const char* descriptor);
// Finds a class by its descriptor, loading it if necessary.
// If class_loader is null, searches boot_class_path_.
mirror::Class* FindClass(Thread* self, const char* descriptor,
const SirtRef<mirror::ClassLoader>& class_loader)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Finds a class by its descriptor using the "system" class loader, ie by searching the
// boot_class_path_.
mirror::Class* FindSystemClass(Thread* self, const char* descriptor)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Finds the array class given for the element class.
mirror::Class* FindArrayClass(Thread* self, mirror::Class* element_class)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Reutrns true if the class linker is initialized.
bool IsInitialized() const;
// Define a new a class based on a ClassDef from a DexFile
mirror::Class* DefineClass(const char* descriptor,
const SirtRef<mirror::ClassLoader>& class_loader,
const DexFile& dex_file, const DexFile::ClassDef& dex_class_def)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Finds a class by its descriptor, returning NULL if it isn't wasn't loaded
// by the given 'class_loader'.
mirror::Class* LookupClass(const char* descriptor, const mirror::ClassLoader* class_loader)
LOCKS_EXCLUDED(Locks::classlinker_classes_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Finds all the classes with the given descriptor, regardless of ClassLoader.
void LookupClasses(const char* descriptor, std::vector<mirror::Class*>& classes)
LOCKS_EXCLUDED(Locks::classlinker_classes_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::Class* FindPrimitiveClass(char type) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// General class unloading is not supported, this is used to prune
// unwanted classes during image writing.
bool RemoveClass(const char* descriptor, const mirror::ClassLoader* class_loader)
LOCKS_EXCLUDED(Locks::classlinker_classes_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void DumpAllClasses(int flags)
LOCKS_EXCLUDED(Locks::classlinker_classes_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void DumpForSigQuit(std::ostream& os)
LOCKS_EXCLUDED(Locks::classlinker_classes_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
size_t NumLoadedClasses()
LOCKS_EXCLUDED(Locks::classlinker_classes_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Resolve a String with the given index from the DexFile, storing the
// result in the DexCache. The referrer is used to identify the
// target DexCache and ClassLoader to use for resolution.
mirror::String* ResolveString(uint32_t string_idx, mirror::ArtMethod* referrer)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Resolve a String with the given index from the DexFile, storing the
// result in the DexCache.
mirror::String* ResolveString(const DexFile& dex_file, uint32_t string_idx,
const SirtRef<mirror::DexCache>& dex_cache)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Resolve a Type with the given index from the DexFile, storing the
// result in the DexCache. The referrer is used to identity the
// target DexCache and ClassLoader to use for resolution.
mirror::Class* ResolveType(const DexFile& dex_file, uint16_t type_idx, mirror::Class* referrer)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Resolve a Type with the given index from the DexFile, storing the
// result in the DexCache. The referrer is used to identify the
// target DexCache and ClassLoader to use for resolution.
mirror::Class* ResolveType(uint16_t type_idx, mirror::ArtMethod* referrer)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::Class* ResolveType(uint16_t type_idx, mirror::ArtField* referrer)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Resolve a type with the given ID from the DexFile, storing the
// result in DexCache. The ClassLoader is used to search for the
// type, since it may be referenced from but not contained within
// the given DexFile.
mirror::Class* ResolveType(const DexFile& dex_file, uint16_t type_idx,
const SirtRef<mirror::DexCache>& dex_cache,
const SirtRef<mirror::ClassLoader>& class_loader)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Resolve a method with a given ID from the DexFile, storing the
// result in DexCache. The ClassLinker and ClassLoader are used as
// in ResolveType. What is unique is the method type argument which
// is used to determine if this method is a direct, static, or
// virtual method.
mirror::ArtMethod* ResolveMethod(const DexFile& dex_file,
uint32_t method_idx,
const SirtRef<mirror::DexCache>& dex_cache,
const SirtRef<mirror::ClassLoader>& class_loader,
mirror::ArtMethod* referrer,
InvokeType type)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::ArtMethod* ResolveMethod(uint32_t method_idx, mirror::ArtMethod* referrer,
InvokeType type)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::ArtField* ResolveField(uint32_t field_idx, mirror::ArtMethod* referrer,
bool is_static)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Resolve a field with a given ID from the DexFile, storing the
// result in DexCache. The ClassLinker and ClassLoader are used as
// in ResolveType. What is unique is the is_static argument which is
// used to determine if we are resolving a static or non-static
// field.
mirror::ArtField* ResolveField(const DexFile& dex_file,
uint32_t field_idx,
const SirtRef<mirror::DexCache>& dex_cache,
const SirtRef<mirror::ClassLoader>& class_loader,
bool is_static)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Resolve a field with a given ID from the DexFile, storing the
// result in DexCache. The ClassLinker and ClassLoader are used as
// in ResolveType. No is_static argument is provided so that Java
// field resolution semantics are followed.
mirror::ArtField* ResolveFieldJLS(const DexFile& dex_file,
uint32_t field_idx,
const SirtRef<mirror::DexCache>& dex_cache,
const SirtRef<mirror::ClassLoader>& class_loader)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Get shorty from method index without resolution. Used to do handlerization.
const char* MethodShorty(uint32_t method_idx, mirror::ArtMethod* referrer, uint32_t* length)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Returns true on success, false if there's an exception pending.
// can_run_clinit=false allows the compiler to attempt to init a class,
// given the restriction that no <clinit> execution is possible.
bool EnsureInitialized(const SirtRef<mirror::Class>& c,
bool can_init_fields, bool can_init_parents)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Initializes classes that have instances in the image but that have
// <clinit> methods so they could not be initialized by the compiler.
void RunRootClinits() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void RegisterDexFile(const DexFile& dex_file)
LOCKS_EXCLUDED(dex_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void RegisterDexFile(const DexFile& dex_file, const SirtRef<mirror::DexCache>& dex_cache)
LOCKS_EXCLUDED(dex_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
const OatFile* RegisterOatFile(const OatFile* oat_file)
LOCKS_EXCLUDED(dex_lock_);
const std::vector<const DexFile*>& GetBootClassPath() {
return boot_class_path_;
}
void VisitClasses(ClassVisitor* visitor, void* arg)
LOCKS_EXCLUDED(dex_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Less efficient variant of VisitClasses that doesn't hold the classlinker_classes_lock_
// when calling the visitor.
void VisitClassesWithoutClassesLock(ClassVisitor* visitor, void* arg)
LOCKS_EXCLUDED(dex_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void VisitRoots(RootCallback* callback, void* arg, VisitRootFlags flags)
LOCKS_EXCLUDED(Locks::classlinker_classes_lock_, dex_lock_);
mirror::DexCache* FindDexCache(const DexFile& dex_file) const
LOCKS_EXCLUDED(dex_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool IsDexFileRegistered(const DexFile& dex_file) const
LOCKS_EXCLUDED(dex_lock_) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void FixupDexCaches(mirror::ArtMethod* resolution_method) const
LOCKS_EXCLUDED(dex_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Generate an oat file from a dex file
bool GenerateOatFile(const char* dex_filename,
int oat_fd,
const char* oat_cache_filename,
std::string* error_msg)
LOCKS_EXCLUDED(Locks::mutator_lock_);
const OatFile* FindOatFileFromOatLocation(const std::string& location,
std::string* error_msg)
LOCKS_EXCLUDED(dex_lock_);
// Finds the oat file for a dex location, generating the oat file if
// it is missing or out of date. Returns the DexFile from within the
// created oat file.
const DexFile* FindOrCreateOatFileForDexLocation(const char* dex_location,
uint32_t dex_location_checksum,
const char* oat_location,
std::vector<std::string>* error_msgs)
LOCKS_EXCLUDED(dex_lock_, Locks::mutator_lock_);
// Find a DexFile within an OatFile given a DexFile location. Note
// that this returns null if the location checksum of the DexFile
// does not match the OatFile.
const DexFile* FindDexFileInOatFileFromDexLocation(const char* location,
const uint32_t* const location_checksum,
std::vector<std::string>* error_msgs)
LOCKS_EXCLUDED(dex_lock_, Locks::mutator_lock_);
// Returns true if oat file contains the dex file with the given location and checksum.
static bool VerifyOatFileChecksums(const OatFile* oat_file,
const char* dex_location,
uint32_t dex_location_checksum,
const InstructionSet instruction_set,
std::string* error_msg);
// TODO: replace this with multiple methods that allocate the correct managed type.
template <class T>
mirror::ObjectArray<T>* AllocObjectArray(Thread* self, size_t length)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::ObjectArray<mirror::Class>* AllocClassArray(Thread* self, size_t length)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::ObjectArray<mirror::String>* AllocStringArray(Thread* self, size_t length)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::ObjectArray<mirror::ArtMethod>* AllocArtMethodArray(Thread* self, size_t length)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::IfTable* AllocIfTable(Thread* self, size_t ifcount)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::ObjectArray<mirror::ArtField>* AllocArtFieldArray(Thread* self, size_t length)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::ObjectArray<mirror::StackTraceElement>* AllocStackTraceElementArray(Thread* self,
size_t length)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void VerifyClass(const SirtRef<mirror::Class>& klass) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool VerifyClassUsingOatFile(const DexFile& dex_file, mirror::Class* klass,
mirror::Class::Status& oat_file_class_status)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void ResolveClassExceptionHandlerTypes(const DexFile& dex_file,
const SirtRef<mirror::Class>& klass)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void ResolveMethodExceptionHandlerTypes(const DexFile& dex_file, mirror::ArtMethod* klass)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::Class* CreateProxyClass(ScopedObjectAccess& soa, jstring name, jobjectArray interfaces,
jobject loader, jobjectArray methods, jobjectArray throws)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
std::string GetDescriptorForProxy(mirror::Class* proxy_class)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::ArtMethod* FindMethodForProxy(mirror::Class* proxy_class,
mirror::ArtMethod* proxy_method)
LOCKS_EXCLUDED(dex_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Get the oat code for a method when its class isn't yet initialized
const void* GetQuickOatCodeFor(mirror::ArtMethod* method)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
const void* GetPortableOatCodeFor(mirror::ArtMethod* method, bool* have_portable_code)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Get the oat code for a method from a method index.
const void* GetQuickOatCodeFor(const DexFile& dex_file, uint16_t class_def_idx, uint32_t method_idx)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
const void* GetPortableOatCodeFor(const DexFile& dex_file, uint16_t class_def_idx, uint32_t method_idx)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
pid_t GetClassesLockOwner(); // For SignalCatcher.
pid_t GetDexLockOwner(); // For SignalCatcher.
const void* GetPortableResolutionTrampoline() const {
return portable_resolution_trampoline_;
}
const void* GetQuickGenericJniTrampoline() const {
return quick_generic_jni_trampoline_;
}
const void* GetQuickResolutionTrampoline() const {
return quick_resolution_trampoline_;
}
const void* GetPortableImtConflictTrampoline() const {
return portable_imt_conflict_trampoline_;
}
const void* GetQuickImtConflictTrampoline() const {
return quick_imt_conflict_trampoline_;
}
const void* GetQuickToInterpreterBridgeTrampoline() const {
return quick_to_interpreter_bridge_trampoline_;
}
InternTable* GetInternTable() const {
return intern_table_;
}
// Attempts to insert a class into a class table. Returns NULL if
// the class was inserted, otherwise returns an existing class with
// the same descriptor and ClassLoader.
mirror::Class* InsertClass(const char* descriptor, mirror::Class* klass, size_t hash)
LOCKS_EXCLUDED(Locks::classlinker_classes_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Special code to allocate an art method, use this instead of class->AllocObject.
mirror::ArtMethod* AllocArtMethod(Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
private:
const OatFile::OatMethod GetOatMethodFor(mirror::ArtMethod* method)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
OatFile& GetImageOatFile(gc::space::ImageSpace* space)
LOCKS_EXCLUDED(dex_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void FinishInit(Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// For early bootstrapping by Init
mirror::Class* AllocClass(Thread* self, mirror::Class* java_lang_Class, uint32_t class_size)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Alloc* convenience functions to avoid needing to pass in mirror::Class*
// values that are known to the ClassLinker such as
// kObjectArrayClass and kJavaLangString etc.
mirror::Class* AllocClass(Thread* self, uint32_t class_size)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::DexCache* AllocDexCache(Thread* self, const DexFile& dex_file)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::ArtField* AllocArtField(Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::Class* CreatePrimitiveClass(Thread* self, Primitive::Type type)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::Class* InitializePrimitiveClass(mirror::Class* primitive_class, Primitive::Type type)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::Class* CreateArrayClass(Thread* self, const char* descriptor,
const SirtRef<mirror::ClassLoader>& class_loader)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void AppendToBootClassPath(const DexFile& dex_file)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void AppendToBootClassPath(const DexFile& dex_file, const SirtRef<mirror::DexCache>& dex_cache)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void ConstructFieldMap(const DexFile& dex_file, const DexFile::ClassDef& dex_class_def,
mirror::Class* c, SafeMap<uint32_t, mirror::ArtField*>& field_map)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
uint32_t SizeOfClass(const DexFile& dex_file,
const DexFile::ClassDef& dex_class_def);
void LoadClass(const DexFile& dex_file,
const DexFile::ClassDef& dex_class_def,
const SirtRef<mirror::Class>& klass,
mirror::ClassLoader* class_loader)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void LoadClassMembers(const DexFile& dex_file,
const byte* class_data,
const SirtRef<mirror::Class>& klass,
mirror::ClassLoader* class_loader,
const OatFile::OatClass* oat_class)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void LoadField(const DexFile& dex_file, const ClassDataItemIterator& it,
const SirtRef<mirror::Class>& klass, const SirtRef<mirror::ArtField>& dst)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::ArtMethod* LoadMethod(Thread* self, const DexFile& dex_file,
const ClassDataItemIterator& dex_method,
const SirtRef<mirror::Class>& klass)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void FixupStaticTrampolines(mirror::Class* klass) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Finds the associated oat class for a dex_file and descriptor
OatFile::OatClass GetOatClass(const DexFile& dex_file, uint16_t class_def_idx)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void RegisterDexFileLocked(const DexFile& dex_file, const SirtRef<mirror::DexCache>& dex_cache)
EXCLUSIVE_LOCKS_REQUIRED(dex_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool IsDexFileRegisteredLocked(const DexFile& dex_file) const
SHARED_LOCKS_REQUIRED(dex_lock_, Locks::mutator_lock_);
bool InitializeClass(const SirtRef<mirror::Class>& klass, bool can_run_clinit,
bool can_init_parents)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool WaitForInitializeClass(const SirtRef<mirror::Class>& klass, Thread* self,
ObjectLock<mirror::Class>& lock);
bool ValidateSuperClassDescriptors(const SirtRef<mirror::Class>& klass)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool IsSameDescriptorInDifferentClassContexts(Thread* self, const char* descriptor,
SirtRef<mirror::ClassLoader>& class_loader1,
SirtRef<mirror::ClassLoader>& class_loader2)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool IsSameMethodSignatureInDifferentClassContexts(Thread* self, mirror::ArtMethod* method,
mirror::Class* klass1,
mirror::Class* klass2)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool LinkClass(Thread* self, const SirtRef<mirror::Class>& klass,
const SirtRef<mirror::ObjectArray<mirror::Class> >& interfaces)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool LinkSuperClass(const SirtRef<mirror::Class>& klass)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool LoadSuperAndInterfaces(const SirtRef<mirror::Class>& klass, const DexFile& dex_file)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool LinkMethods(const SirtRef<mirror::Class>& klass,
const SirtRef<mirror::ObjectArray<mirror::Class> >& interfaces)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool LinkVirtualMethods(const SirtRef<mirror::Class>& klass)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool LinkInterfaceMethods(const SirtRef<mirror::Class>& klass,
const SirtRef<mirror::ObjectArray<mirror::Class> >& interfaces)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool LinkStaticFields(const SirtRef<mirror::Class>& klass)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool LinkInstanceFields(const SirtRef<mirror::Class>& klass)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool LinkFields(const SirtRef<mirror::Class>& klass, bool is_static)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void CreateReferenceInstanceOffsets(const SirtRef<mirror::Class>& klass)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void CreateReferenceStaticOffsets(const SirtRef<mirror::Class>& klass)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void CreateReferenceOffsets(const SirtRef<mirror::Class>& klass, bool is_static,
uint32_t reference_offsets)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// For use by ImageWriter to find DexCaches for its roots
const std::vector<mirror::DexCache*>& GetDexCaches() {
return dex_caches_;
}
const OatFile* FindOpenedOatFileForDexFile(const DexFile& dex_file)
LOCKS_EXCLUDED(dex_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
const OatFile* FindOpenedOatFileFromDexLocation(const char* dex_location,
const uint32_t* const dex_location_checksum)
LOCKS_EXCLUDED(dex_lock_);
const OatFile* FindOpenedOatFileFromOatLocation(const std::string& oat_location)
LOCKS_EXCLUDED(dex_lock_);
const DexFile* FindDexFileInOatLocation(const char* dex_location,
uint32_t dex_location_checksum,
const char* oat_location,
std::string* error_msg)
LOCKS_EXCLUDED(dex_lock_);
const DexFile* VerifyAndOpenDexFileFromOatFile(const std::string& oat_file_location,
const char* dex_location,
std::string* error_msg,
bool* open_failed)
LOCKS_EXCLUDED(dex_lock_);
mirror::ArtMethod* CreateProxyConstructor(Thread* self, const SirtRef<mirror::Class>& klass,
mirror::Class* proxy_class)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::ArtMethod* CreateProxyMethod(Thread* self, const SirtRef<mirror::Class>& klass,
const SirtRef<mirror::ArtMethod>& prototype)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
std::vector<const DexFile*> boot_class_path_;
mutable ReaderWriterMutex dex_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
std::vector<size_t> new_dex_cache_roots_ GUARDED_BY(dex_lock_);;
std::vector<mirror::DexCache*> dex_caches_ GUARDED_BY(dex_lock_);
std::vector<const OatFile*> oat_files_ GUARDED_BY(dex_lock_);
// multimap from a string hash code of a class descriptor to
// mirror::Class* instances. Results should be compared for a matching
// Class::descriptor_ and Class::class_loader_.
typedef std::multimap<size_t, mirror::Class*> Table;
Table class_table_ GUARDED_BY(Locks::classlinker_classes_lock_);
std::vector<std::pair<size_t, mirror::Class*> > new_class_roots_;
// Do we need to search dex caches to find image classes?
bool dex_cache_image_class_lookup_required_;
// Number of times we've searched dex caches for a class. After a certain number of misses we move
// the classes into the class_table_ to avoid dex cache based searches.
AtomicInteger failed_dex_cache_class_lookups_;
mirror::Class* LookupClassFromTableLocked(const char* descriptor,
const mirror::ClassLoader* class_loader,
size_t hash)
SHARED_LOCKS_REQUIRED(Locks::classlinker_classes_lock_, Locks::mutator_lock_);
void MoveImageClassesToClassTable() LOCKS_EXCLUDED(Locks::classlinker_classes_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::Class* LookupClassFromImage(const char* descriptor)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// indexes into class_roots_.
// needs to be kept in sync with class_roots_descriptors_.
enum ClassRoot {
kJavaLangClass,
kJavaLangObject,
kClassArrayClass,
kObjectArrayClass,
kJavaLangString,
kJavaLangDexCache,
kJavaLangRefReference,
kJavaLangReflectArtField,
kJavaLangReflectArtMethod,
kJavaLangReflectProxy,
kJavaLangStringArrayClass,
kJavaLangReflectArtFieldArrayClass,
kJavaLangReflectArtMethodArrayClass,
kJavaLangClassLoader,
kJavaLangThrowable,
kJavaLangClassNotFoundException,
kJavaLangStackTraceElement,
kPrimitiveBoolean,
kPrimitiveByte,
kPrimitiveChar,
kPrimitiveDouble,
kPrimitiveFloat,
kPrimitiveInt,
kPrimitiveLong,
kPrimitiveShort,
kPrimitiveVoid,
kBooleanArrayClass,
kByteArrayClass,
kCharArrayClass,
kDoubleArrayClass,
kFloatArrayClass,
kIntArrayClass,
kLongArrayClass,
kShortArrayClass,
kJavaLangStackTraceElementArrayClass,
kClassRootsMax,
};
mirror::ObjectArray<mirror::Class>* class_roots_;
mirror::Class* GetClassRoot(ClassRoot class_root) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void SetClassRoot(ClassRoot class_root, mirror::Class* klass)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
mirror::ObjectArray<mirror::Class>* GetClassRoots() {
DCHECK(class_roots_ != NULL);
return class_roots_;
}
static const char* class_roots_descriptors_[];
const char* GetClassRootDescriptor(ClassRoot class_root) {
const char* descriptor = class_roots_descriptors_[class_root];
CHECK(descriptor != NULL);
return descriptor;
}
// The interface table used by all arrays.
mirror::IfTable* array_iftable_;
// A cache of the last FindArrayClass results. The cache serves to avoid creating array class
// descriptors for the sake of performing FindClass.
static constexpr size_t kFindArrayCacheSize = 16;
mirror::Class* find_array_class_cache_[kFindArrayCacheSize];
size_t find_array_class_cache_next_victim_;
bool init_done_;
bool log_new_dex_caches_roots_ GUARDED_BY(dex_lock_);
bool log_new_class_table_roots_ GUARDED_BY(Locks::classlinker_classes_lock_);
InternTable* intern_table_;
const void* portable_resolution_trampoline_;
const void* quick_resolution_trampoline_;
const void* portable_imt_conflict_trampoline_;
const void* quick_imt_conflict_trampoline_;
const void* quick_generic_jni_trampoline_;
const void* quick_to_interpreter_bridge_trampoline_;
friend class ImageWriter; // for GetClassRoots
FRIEND_TEST(ClassLinkerTest, ClassRootDescriptors);
FRIEND_TEST(mirror::DexCacheTest, Open);
FRIEND_TEST(ExceptionTest, FindExceptionHandler);
FRIEND_TEST(ObjectTest, AllocObjectArray);
DISALLOW_COPY_AND_ASSIGN(ClassLinker);
};
} // namespace art
#endif // ART_RUNTIME_CLASS_LINKER_H_