| /* |
| * 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 "class_linker.h" |
| |
| #include <fcntl.h> |
| #include <sys/file.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| |
| #include <deque> |
| #include <string> |
| #include <utility> |
| #include <vector> |
| |
| #include "casts.h" |
| #include "class_loader.h" |
| #include "debugger.h" |
| #include "dex_cache.h" |
| #include "dex_file.h" |
| #include "dex_verifier.h" |
| #include "heap.h" |
| #include "intern_table.h" |
| #include "leb128.h" |
| #include "logging.h" |
| #include "oat_file.h" |
| #include "object.h" |
| #include "object_utils.h" |
| #include "os.h" |
| #include "runtime.h" |
| #include "runtime_support.h" |
| #include "ScopedLocalRef.h" |
| #include "space.h" |
| #include "stack_indirect_reference_table.h" |
| #include "stl_util.h" |
| #include "thread.h" |
| #include "UniquePtr.h" |
| #include "utils.h" |
| |
| namespace art { |
| |
| static void ThrowNoClassDefFoundError(const char* fmt, ...) __attribute__((__format__(__printf__, 1, 2))); |
| static void ThrowNoClassDefFoundError(const char* fmt, ...) { |
| va_list args; |
| va_start(args, fmt); |
| Thread::Current()->ThrowNewExceptionV("Ljava/lang/NoClassDefFoundError;", fmt, args); |
| va_end(args); |
| } |
| |
| static void ThrowClassFormatError(const char* fmt, ...) __attribute__((__format__(__printf__, 1, 2))); |
| static void ThrowClassFormatError(const char* fmt, ...) { |
| va_list args; |
| va_start(args, fmt); |
| Thread::Current()->ThrowNewExceptionV("Ljava/lang/ClassFormatError;", fmt, args); |
| va_end(args); |
| } |
| |
| static void ThrowLinkageError(const char* fmt, ...) __attribute__((__format__(__printf__, 1, 2))); |
| static void ThrowLinkageError(const char* fmt, ...) { |
| va_list args; |
| va_start(args, fmt); |
| Thread::Current()->ThrowNewExceptionV("Ljava/lang/LinkageError;", fmt, args); |
| va_end(args); |
| } |
| |
| static void ThrowNoSuchMethodError(bool is_direct, Class* c, const StringPiece& name, |
| const StringPiece& signature) { |
| ClassHelper kh(c); |
| std::ostringstream msg; |
| msg << "no " << (is_direct ? "direct" : "virtual") << " method " << name << signature |
| << " in class " << kh.GetDescriptor() << " or its superclasses"; |
| std::string location(kh.GetLocation()); |
| if (!location.empty()) { |
| msg << " (defined in " << location << ")"; |
| } |
| Thread::Current()->ThrowNewException("Ljava/lang/NoSuchMethodError;", msg.str().c_str()); |
| } |
| |
| static void ThrowNoSuchFieldError(const StringPiece& scope, Class* c, const StringPiece& type, |
| const StringPiece& name) { |
| ClassHelper kh(c); |
| std::ostringstream msg; |
| msg << "no " << scope << "field " << name << " of type " << type |
| << " in class " << kh.GetDescriptor() << " or its superclasses"; |
| std::string location(kh.GetLocation()); |
| if (!location.empty()) { |
| msg << " (defined in " << location << ")"; |
| } |
| Thread::Current()->ThrowNewException("Ljava/lang/NoSuchFieldError;", msg.str().c_str()); |
| } |
| |
| static void ThrowNullPointerException(const char* fmt, ...) __attribute__((__format__(__printf__, 1, 2))); |
| static void ThrowNullPointerException(const char* fmt, ...) { |
| va_list args; |
| va_start(args, fmt); |
| Thread::Current()->ThrowNewExceptionV("Ljava/lang/NullPointerException;", fmt, args); |
| va_end(args); |
| } |
| |
| static void ThrowEarlierClassFailure(Class* c) { |
| /* |
| * The class failed to initialize on a previous attempt, so we want to throw |
| * a NoClassDefFoundError (v2 2.17.5). The exception to this rule is if we |
| * failed in verification, in which case v2 5.4.1 says we need to re-throw |
| * the previous error. |
| */ |
| LOG(INFO) << "Rejecting re-init on previously-failed class " << PrettyClass(c); |
| |
| CHECK(c->IsErroneous()) << PrettyClass(c); |
| if (c->GetVerifyErrorClass() != NULL) { |
| // TODO: change the verifier to store an _instance_, with a useful detail message? |
| ClassHelper ve_ch(c->GetVerifyErrorClass()); |
| std::string error_descriptor(ve_ch.GetDescriptor()); |
| Thread::Current()->ThrowNewException(error_descriptor.c_str(), PrettyDescriptor(c).c_str()); |
| } else { |
| ThrowNoClassDefFoundError("%s", PrettyDescriptor(c).c_str()); |
| } |
| } |
| |
| static void WrapExceptionInInitializer() { |
| JNIEnv* env = Thread::Current()->GetJniEnv(); |
| |
| ScopedLocalRef<jthrowable> cause(env, env->ExceptionOccurred()); |
| CHECK(cause.get() != NULL); |
| |
| env->ExceptionClear(); |
| |
| // TODO: add java.lang.Error to JniConstants? |
| ScopedLocalRef<jclass> error_class(env, env->FindClass("java/lang/Error")); |
| CHECK(error_class.get() != NULL); |
| if (env->IsInstanceOf(cause.get(), error_class.get())) { |
| // We only wrap non-Error exceptions; an Error can just be used as-is. |
| env->Throw(cause.get()); |
| return; |
| } |
| |
| // TODO: add java.lang.ExceptionInInitializerError to JniConstants? |
| ScopedLocalRef<jclass> eiie_class(env, env->FindClass("java/lang/ExceptionInInitializerError")); |
| CHECK(eiie_class.get() != NULL); |
| |
| jmethodID mid = env->GetMethodID(eiie_class.get(), "<init>" , "(Ljava/lang/Throwable;)V"); |
| CHECK(mid != NULL); |
| |
| ScopedLocalRef<jthrowable> eiie(env, |
| reinterpret_cast<jthrowable>(env->NewObject(eiie_class.get(), mid, cause.get()))); |
| env->Throw(eiie.get()); |
| } |
| |
| static size_t Hash(const char* s) { |
| // This is the java.lang.String hashcode for convenience, not interoperability. |
| size_t hash = 0; |
| for (; *s != '\0'; ++s) { |
| hash = hash * 31 + *s; |
| } |
| return hash; |
| } |
| |
| const char* ClassLinker::class_roots_descriptors_[] = { |
| "Ljava/lang/Class;", |
| "Ljava/lang/Object;", |
| "[Ljava/lang/Class;", |
| "[Ljava/lang/Object;", |
| "Ljava/lang/String;", |
| "Ljava/lang/ref/Reference;", |
| "Ljava/lang/reflect/Constructor;", |
| "Ljava/lang/reflect/Field;", |
| "Ljava/lang/reflect/Method;", |
| "Ljava/lang/reflect/Proxy;", |
| "Ljava/lang/ClassLoader;", |
| "Ldalvik/system/BaseDexClassLoader;", |
| "Ldalvik/system/PathClassLoader;", |
| "Ljava/lang/Throwable;", |
| "Ljava/lang/ClassNotFoundException;", |
| "Ljava/lang/StackTraceElement;", |
| "Z", |
| "B", |
| "C", |
| "D", |
| "F", |
| "I", |
| "J", |
| "S", |
| "V", |
| "[Z", |
| "[B", |
| "[C", |
| "[D", |
| "[F", |
| "[I", |
| "[J", |
| "[S", |
| "[Ljava/lang/StackTraceElement;", |
| }; |
| |
| ClassLinker* ClassLinker::CreateFromCompiler(const std::vector<const DexFile*>& boot_class_path, |
| InternTable* intern_table) { |
| CHECK_NE(boot_class_path.size(), 0U); |
| UniquePtr<ClassLinker> class_linker(new ClassLinker(intern_table)); |
| class_linker->InitFromCompiler(boot_class_path); |
| return class_linker.release(); |
| } |
| |
| ClassLinker* ClassLinker::CreateFromImage(InternTable* intern_table) { |
| UniquePtr<ClassLinker> class_linker(new ClassLinker(intern_table)); |
| class_linker->InitFromImage(); |
| return class_linker.release(); |
| } |
| |
| ClassLinker::ClassLinker(InternTable* intern_table) |
| : dex_lock_("ClassLinker dex lock"), |
| classes_lock_("ClassLinker classes lock"), |
| class_roots_(NULL), |
| array_iftable_(NULL), |
| init_done_(false), |
| intern_table_(intern_table) { |
| CHECK_EQ(arraysize(class_roots_descriptors_), size_t(kClassRootsMax)); |
| } |
| |
| void ClassLinker::InitFromCompiler(const std::vector<const DexFile*>& boot_class_path) { |
| VLOG(startup) << "ClassLinker::Init"; |
| CHECK(Runtime::Current()->IsCompiler()); |
| |
| CHECK(!init_done_); |
| |
| // java_lang_Class comes first, it's needed for AllocClass |
| Heap* heap = Runtime::Current()->GetHeap(); |
| SirtRef<Class> java_lang_Class(down_cast<Class*>(heap->AllocObject(NULL, sizeof(ClassClass)))); |
| CHECK(java_lang_Class.get() != NULL); |
| java_lang_Class->SetClass(java_lang_Class.get()); |
| java_lang_Class->SetClassSize(sizeof(ClassClass)); |
| // AllocClass(Class*) can now be used |
| |
| // Class[] is used for reflection support. |
| SirtRef<Class> class_array_class(AllocClass(java_lang_Class.get(), sizeof(Class))); |
| class_array_class->SetComponentType(java_lang_Class.get()); |
| |
| // java_lang_Object comes next so that object_array_class can be created |
| SirtRef<Class> java_lang_Object(AllocClass(java_lang_Class.get(), sizeof(Class))); |
| CHECK(java_lang_Object.get() != NULL); |
| // backfill Object as the super class of Class |
| java_lang_Class->SetSuperClass(java_lang_Object.get()); |
| java_lang_Object->SetStatus(Class::kStatusLoaded); |
| |
| // Object[] next to hold class roots |
| SirtRef<Class> object_array_class(AllocClass(java_lang_Class.get(), sizeof(Class))); |
| object_array_class->SetComponentType(java_lang_Object.get()); |
| |
| // Setup the char class to be used for char[] |
| SirtRef<Class> char_class(AllocClass(java_lang_Class.get(), sizeof(Class))); |
| |
| // Setup the char[] class to be used for String |
| SirtRef<Class> char_array_class(AllocClass(java_lang_Class.get(), sizeof(Class))); |
| char_array_class->SetComponentType(char_class.get()); |
| CharArray::SetArrayClass(char_array_class.get()); |
| |
| // Setup String |
| SirtRef<Class> java_lang_String(AllocClass(java_lang_Class.get(), sizeof(StringClass))); |
| String::SetClass(java_lang_String.get()); |
| java_lang_String->SetObjectSize(sizeof(String)); |
| java_lang_String->SetStatus(Class::kStatusResolved); |
| |
| // Create storage for root classes, save away our work so far (requires |
| // descriptors) |
| class_roots_ = ObjectArray<Class>::Alloc(object_array_class.get(), kClassRootsMax); |
| CHECK(class_roots_ != NULL); |
| SetClassRoot(kJavaLangClass, java_lang_Class.get()); |
| SetClassRoot(kJavaLangObject, java_lang_Object.get()); |
| SetClassRoot(kClassArrayClass, class_array_class.get()); |
| SetClassRoot(kObjectArrayClass, object_array_class.get()); |
| SetClassRoot(kCharArrayClass, char_array_class.get()); |
| SetClassRoot(kJavaLangString, java_lang_String.get()); |
| |
| // Setup the primitive type classes. |
| SetClassRoot(kPrimitiveBoolean, CreatePrimitiveClass("Z", Primitive::kPrimBoolean)); |
| SetClassRoot(kPrimitiveByte, CreatePrimitiveClass("B", Primitive::kPrimByte)); |
| SetClassRoot(kPrimitiveShort, CreatePrimitiveClass("S", Primitive::kPrimShort)); |
| SetClassRoot(kPrimitiveInt, CreatePrimitiveClass("I", Primitive::kPrimInt)); |
| SetClassRoot(kPrimitiveLong, CreatePrimitiveClass("J", Primitive::kPrimLong)); |
| SetClassRoot(kPrimitiveFloat, CreatePrimitiveClass("F", Primitive::kPrimFloat)); |
| SetClassRoot(kPrimitiveDouble, CreatePrimitiveClass("D", Primitive::kPrimDouble)); |
| SetClassRoot(kPrimitiveVoid, CreatePrimitiveClass("V", Primitive::kPrimVoid)); |
| |
| // Create array interface entries to populate once we can load system classes |
| array_iftable_ = AllocObjectArray<InterfaceEntry>(2); |
| |
| // Create int array type for AllocDexCache (done in AppendToBootClassPath) |
| SirtRef<Class> int_array_class(AllocClass(java_lang_Class.get(), sizeof(Class))); |
| int_array_class->SetComponentType(GetClassRoot(kPrimitiveInt)); |
| IntArray::SetArrayClass(int_array_class.get()); |
| SetClassRoot(kIntArrayClass, int_array_class.get()); |
| |
| // now that these are registered, we can use AllocClass() and AllocObjectArray |
| |
| // setup boot_class_path_ and register class_path now that we can |
| // use AllocObjectArray to create DexCache instances |
| CHECK_NE(0U, boot_class_path.size()); |
| for (size_t i = 0; i != boot_class_path.size(); ++i) { |
| const DexFile* dex_file = boot_class_path[i]; |
| CHECK(dex_file != NULL); |
| AppendToBootClassPath(*dex_file); |
| } |
| |
| // Constructor, Field, and Method are necessary so that FindClass can link members |
| SirtRef<Class> java_lang_reflect_Constructor(AllocClass(java_lang_Class.get(), sizeof(MethodClass))); |
| CHECK(java_lang_reflect_Constructor.get() != NULL); |
| java_lang_reflect_Constructor->SetObjectSize(sizeof(Method)); |
| SetClassRoot(kJavaLangReflectConstructor, java_lang_reflect_Constructor.get()); |
| java_lang_reflect_Constructor->SetStatus(Class::kStatusResolved); |
| |
| SirtRef<Class> java_lang_reflect_Field(AllocClass(java_lang_Class.get(), sizeof(FieldClass))); |
| CHECK(java_lang_reflect_Field.get() != NULL); |
| java_lang_reflect_Field->SetObjectSize(sizeof(Field)); |
| SetClassRoot(kJavaLangReflectField, java_lang_reflect_Field.get()); |
| java_lang_reflect_Field->SetStatus(Class::kStatusResolved); |
| Field::SetClass(java_lang_reflect_Field.get()); |
| |
| SirtRef<Class> java_lang_reflect_Method(AllocClass(java_lang_Class.get(), sizeof(MethodClass))); |
| CHECK(java_lang_reflect_Method.get() != NULL); |
| java_lang_reflect_Method->SetObjectSize(sizeof(Method)); |
| SetClassRoot(kJavaLangReflectMethod, java_lang_reflect_Method.get()); |
| java_lang_reflect_Method->SetStatus(Class::kStatusResolved); |
| Method::SetClasses(java_lang_reflect_Constructor.get(), java_lang_reflect_Method.get()); |
| |
| // now we can use FindSystemClass |
| |
| // run char class through InitializePrimitiveClass to finish init |
| InitializePrimitiveClass(char_class.get(), "C", Primitive::kPrimChar); |
| SetClassRoot(kPrimitiveChar, char_class.get()); // needs descriptor |
| |
| // Object and String need to be rerun through FindSystemClass to finish init |
| java_lang_Object->SetStatus(Class::kStatusNotReady); |
| Class* Object_class = FindSystemClass("Ljava/lang/Object;"); |
| CHECK_EQ(java_lang_Object.get(), Object_class); |
| CHECK_EQ(java_lang_Object->GetObjectSize(), sizeof(Object)); |
| java_lang_String->SetStatus(Class::kStatusNotReady); |
| Class* String_class = FindSystemClass("Ljava/lang/String;"); |
| CHECK_EQ(java_lang_String.get(), String_class); |
| CHECK_EQ(java_lang_String->GetObjectSize(), sizeof(String)); |
| |
| // Setup the primitive array type classes - can't be done until Object has a vtable |
| SetClassRoot(kBooleanArrayClass, FindSystemClass("[Z")); |
| BooleanArray::SetArrayClass(GetClassRoot(kBooleanArrayClass)); |
| |
| SetClassRoot(kByteArrayClass, FindSystemClass("[B")); |
| ByteArray::SetArrayClass(GetClassRoot(kByteArrayClass)); |
| |
| Class* found_char_array_class = FindSystemClass("[C"); |
| CHECK_EQ(char_array_class.get(), found_char_array_class); |
| |
| SetClassRoot(kShortArrayClass, FindSystemClass("[S")); |
| ShortArray::SetArrayClass(GetClassRoot(kShortArrayClass)); |
| |
| Class* found_int_array_class = FindSystemClass("[I"); |
| CHECK_EQ(int_array_class.get(), found_int_array_class); |
| |
| SetClassRoot(kLongArrayClass, FindSystemClass("[J")); |
| LongArray::SetArrayClass(GetClassRoot(kLongArrayClass)); |
| |
| SetClassRoot(kFloatArrayClass, FindSystemClass("[F")); |
| FloatArray::SetArrayClass(GetClassRoot(kFloatArrayClass)); |
| |
| SetClassRoot(kDoubleArrayClass, FindSystemClass("[D")); |
| DoubleArray::SetArrayClass(GetClassRoot(kDoubleArrayClass)); |
| |
| Class* found_class_array_class = FindSystemClass("[Ljava/lang/Class;"); |
| CHECK_EQ(class_array_class.get(), found_class_array_class); |
| |
| Class* found_object_array_class = FindSystemClass("[Ljava/lang/Object;"); |
| CHECK_EQ(object_array_class.get(), found_object_array_class); |
| |
| // Setup the single, global copies of "interfaces" and "iftable" |
| Class* java_lang_Cloneable = FindSystemClass("Ljava/lang/Cloneable;"); |
| CHECK(java_lang_Cloneable != NULL); |
| Class* java_io_Serializable = FindSystemClass("Ljava/io/Serializable;"); |
| CHECK(java_io_Serializable != NULL); |
| // We assume that Cloneable/Serializable don't have superinterfaces -- |
| // normally we'd have to crawl up and explicitly list all of the |
| // supers as well. |
| array_iftable_->Set(0, AllocInterfaceEntry(java_lang_Cloneable)); |
| array_iftable_->Set(1, AllocInterfaceEntry(java_io_Serializable)); |
| |
| // Sanity check Class[] and Object[]'s interfaces |
| ClassHelper kh(class_array_class.get(), this); |
| CHECK_EQ(java_lang_Cloneable, kh.GetInterface(0)); |
| CHECK_EQ(java_io_Serializable, kh.GetInterface(1)); |
| kh.ChangeClass(object_array_class.get()); |
| CHECK_EQ(java_lang_Cloneable, kh.GetInterface(0)); |
| CHECK_EQ(java_io_Serializable, kh.GetInterface(1)); |
| // run Class, Constructor, Field, and Method through FindSystemClass. |
| // this initializes their dex_cache_ fields and register them in classes_. |
| Class* Class_class = FindSystemClass("Ljava/lang/Class;"); |
| CHECK_EQ(java_lang_Class.get(), Class_class); |
| |
| java_lang_reflect_Constructor->SetStatus(Class::kStatusNotReady); |
| Class* Constructor_class = FindSystemClass("Ljava/lang/reflect/Constructor;"); |
| CHECK_EQ(java_lang_reflect_Constructor.get(), Constructor_class); |
| |
| java_lang_reflect_Field->SetStatus(Class::kStatusNotReady); |
| Class* Field_class = FindSystemClass("Ljava/lang/reflect/Field;"); |
| CHECK_EQ(java_lang_reflect_Field.get(), Field_class); |
| |
| java_lang_reflect_Method->SetStatus(Class::kStatusNotReady); |
| Class* Method_class = FindSystemClass("Ljava/lang/reflect/Method;"); |
| CHECK_EQ(java_lang_reflect_Method.get(), Method_class); |
| |
| // End of special init trickery, subsequent classes may be loaded via FindSystemClass |
| |
| // Create java.lang.reflect.Proxy root |
| Class* java_lang_reflect_Proxy = FindSystemClass("Ljava/lang/reflect/Proxy;"); |
| SetClassRoot(kJavaLangReflectProxy, java_lang_reflect_Proxy); |
| |
| // java.lang.ref classes need to be specially flagged, but otherwise are normal classes |
| Class* java_lang_ref_Reference = FindSystemClass("Ljava/lang/ref/Reference;"); |
| SetClassRoot(kJavaLangRefReference, java_lang_ref_Reference); |
| Class* java_lang_ref_FinalizerReference = FindSystemClass("Ljava/lang/ref/FinalizerReference;"); |
| java_lang_ref_FinalizerReference->SetAccessFlags( |
| java_lang_ref_FinalizerReference->GetAccessFlags() | |
| kAccClassIsReference | kAccClassIsFinalizerReference); |
| Class* java_lang_ref_PhantomReference = FindSystemClass("Ljava/lang/ref/PhantomReference;"); |
| java_lang_ref_PhantomReference->SetAccessFlags( |
| java_lang_ref_PhantomReference->GetAccessFlags() | |
| kAccClassIsReference | kAccClassIsPhantomReference); |
| Class* java_lang_ref_SoftReference = FindSystemClass("Ljava/lang/ref/SoftReference;"); |
| java_lang_ref_SoftReference->SetAccessFlags( |
| java_lang_ref_SoftReference->GetAccessFlags() | kAccClassIsReference); |
| Class* java_lang_ref_WeakReference = FindSystemClass("Ljava/lang/ref/WeakReference;"); |
| java_lang_ref_WeakReference->SetAccessFlags( |
| java_lang_ref_WeakReference->GetAccessFlags() | |
| kAccClassIsReference | kAccClassIsWeakReference); |
| |
| // Setup the ClassLoaders, verifying the object_size_ |
| Class* java_lang_ClassLoader = FindSystemClass("Ljava/lang/ClassLoader;"); |
| CHECK_EQ(java_lang_ClassLoader->GetObjectSize(), sizeof(ClassLoader)); |
| SetClassRoot(kJavaLangClassLoader, java_lang_ClassLoader); |
| |
| Class* dalvik_system_BaseDexClassLoader = FindSystemClass("Ldalvik/system/BaseDexClassLoader;"); |
| CHECK_EQ(dalvik_system_BaseDexClassLoader->GetObjectSize(), sizeof(BaseDexClassLoader)); |
| SetClassRoot(kDalvikSystemBaseDexClassLoader, dalvik_system_BaseDexClassLoader); |
| |
| Class* dalvik_system_PathClassLoader = FindSystemClass("Ldalvik/system/PathClassLoader;"); |
| CHECK_EQ(dalvik_system_PathClassLoader->GetObjectSize(), sizeof(PathClassLoader)); |
| SetClassRoot(kDalvikSystemPathClassLoader, dalvik_system_PathClassLoader); |
| PathClassLoader::SetClass(dalvik_system_PathClassLoader); |
| |
| // Set up java.lang.Throwable, java.lang.ClassNotFoundException, and |
| // java.lang.StackTraceElement as a convenience |
| SetClassRoot(kJavaLangThrowable, FindSystemClass("Ljava/lang/Throwable;")); |
| Throwable::SetClass(GetClassRoot(kJavaLangThrowable)); |
| SetClassRoot(kJavaLangClassNotFoundException, FindSystemClass("Ljava/lang/ClassNotFoundException;")); |
| SetClassRoot(kJavaLangStackTraceElement, FindSystemClass("Ljava/lang/StackTraceElement;")); |
| SetClassRoot(kJavaLangStackTraceElementArrayClass, FindSystemClass("[Ljava/lang/StackTraceElement;")); |
| StackTraceElement::SetClass(GetClassRoot(kJavaLangStackTraceElement)); |
| |
| FinishInit(); |
| |
| VLOG(startup) << "ClassLinker::InitFromCompiler exiting"; |
| } |
| |
| void ClassLinker::FinishInit() { |
| VLOG(startup) << "ClassLinker::FinishInit entering"; |
| |
| // Let the heap know some key offsets into java.lang.ref instances |
| // Note: we hard code the field indexes here rather than using FindInstanceField |
| // as the types of the field can't be resolved prior to the runtime being |
| // fully initialized |
| Class* java_lang_ref_Reference = GetClassRoot(kJavaLangRefReference); |
| Class* java_lang_ref_ReferenceQueue = FindSystemClass("Ljava/lang/ref/ReferenceQueue;"); |
| Class* java_lang_ref_FinalizerReference = FindSystemClass("Ljava/lang/ref/FinalizerReference;"); |
| |
| Heap* heap = Runtime::Current()->GetHeap(); |
| heap->SetWellKnownClasses(java_lang_ref_FinalizerReference, java_lang_ref_ReferenceQueue); |
| |
| const DexFile& java_lang_dex = FindDexFile(java_lang_ref_Reference->GetDexCache()); |
| |
| Field* pendingNext = java_lang_ref_Reference->GetInstanceField(0); |
| FieldHelper fh(pendingNext, this); |
| CHECK_STREQ(fh.GetName(), "pendingNext"); |
| CHECK_EQ(java_lang_dex.GetFieldId(pendingNext->GetDexFieldIndex()).type_idx_, |
| java_lang_ref_Reference->GetDexTypeIndex()); |
| |
| Field* queue = java_lang_ref_Reference->GetInstanceField(1); |
| fh.ChangeField(queue); |
| CHECK_STREQ(fh.GetName(), "queue"); |
| CHECK_EQ(java_lang_dex.GetFieldId(queue->GetDexFieldIndex()).type_idx_, |
| java_lang_ref_ReferenceQueue->GetDexTypeIndex()); |
| |
| Field* queueNext = java_lang_ref_Reference->GetInstanceField(2); |
| fh.ChangeField(queueNext); |
| CHECK_STREQ(fh.GetName(), "queueNext"); |
| CHECK_EQ(java_lang_dex.GetFieldId(queueNext->GetDexFieldIndex()).type_idx_, |
| java_lang_ref_Reference->GetDexTypeIndex()); |
| |
| Field* referent = java_lang_ref_Reference->GetInstanceField(3); |
| fh.ChangeField(referent); |
| CHECK_STREQ(fh.GetName(), "referent"); |
| CHECK_EQ(java_lang_dex.GetFieldId(referent->GetDexFieldIndex()).type_idx_, |
| GetClassRoot(kJavaLangObject)->GetDexTypeIndex()); |
| |
| Field* zombie = java_lang_ref_FinalizerReference->GetInstanceField(2); |
| fh.ChangeField(zombie); |
| CHECK_STREQ(fh.GetName(), "zombie"); |
| CHECK_EQ(java_lang_dex.GetFieldId(zombie->GetDexFieldIndex()).type_idx_, |
| GetClassRoot(kJavaLangObject)->GetDexTypeIndex()); |
| |
| heap->SetReferenceOffsets(referent->GetOffset(), |
| queue->GetOffset(), |
| queueNext->GetOffset(), |
| pendingNext->GetOffset(), |
| zombie->GetOffset()); |
| |
| // ensure all class_roots_ are initialized |
| for (size_t i = 0; i < kClassRootsMax; i++) { |
| ClassRoot class_root = static_cast<ClassRoot>(i); |
| Class* klass = GetClassRoot(class_root); |
| CHECK(klass != NULL); |
| DCHECK(klass->IsArrayClass() || klass->IsPrimitive() || klass->GetDexCache() != NULL); |
| // note SetClassRoot does additional validation. |
| // if possible add new checks there to catch errors early |
| } |
| |
| CHECK(array_iftable_ != NULL); |
| |
| // disable the slow paths in FindClass and CreatePrimitiveClass now |
| // that Object, Class, and Object[] are setup |
| init_done_ = true; |
| |
| VLOG(startup) << "ClassLinker::FinishInit exiting"; |
| } |
| |
| void ClassLinker::RunRootClinits() { |
| Thread* self = Thread::Current(); |
| for (size_t i = 0; i < ClassLinker::kClassRootsMax; ++i) { |
| Class* c = GetClassRoot(ClassRoot(i)); |
| if (!c->IsArrayClass() && !c->IsPrimitive()) { |
| EnsureInitialized(GetClassRoot(ClassRoot(i)), true, true); |
| CHECK(!self->IsExceptionPending()) << PrettyTypeOf(self->GetException()); |
| } |
| } |
| } |
| |
| bool ClassLinker::GenerateOatFile(const std::string& dex_filename, |
| int oat_fd, |
| const std::string& oat_cache_filename) { |
| std::string dex2oat_string(GetAndroidRoot()); |
| dex2oat_string += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat"); |
| const char* dex2oat = dex2oat_string.c_str(); |
| |
| const char* class_path = Runtime::Current()->GetClassPathString().c_str(); |
| |
| Heap* heap = Runtime::Current()->GetHeap(); |
| std::string boot_image_option_string("--boot-image="); |
| boot_image_option_string += heap->GetImageSpace()->GetImageFilename(); |
| const char* boot_image_option = boot_image_option_string.c_str(); |
| |
| std::string dex_file_option_string("--dex-file="); |
| dex_file_option_string += dex_filename; |
| const char* dex_file_option = dex_file_option_string.c_str(); |
| |
| std::string oat_fd_option_string("--oat-fd="); |
| StringAppendF(&oat_fd_option_string, "%d", oat_fd); |
| const char* oat_fd_option = oat_fd_option_string.c_str(); |
| |
| std::string oat_location_option_string("--oat-location="); |
| oat_location_option_string += oat_cache_filename; |
| const char* oat_location_option = oat_location_option_string.c_str(); |
| |
| // fork and exec dex2oat |
| pid_t pid = fork(); |
| if (pid == 0) { |
| // no allocation allowed between fork and exec |
| |
| // change process groups, so we don't get reaped by ProcessManager |
| setpgid(0, 0); |
| |
| VLOG(class_linker) << dex2oat |
| << " --runtime-arg -Xms64m" |
| << " --runtime-arg -Xmx64m" |
| << " --runtime-arg -classpath" |
| << " --runtime-arg " << class_path |
| << " " << boot_image_option |
| << " " << dex_file_option |
| << " " << oat_fd_option |
| << " " << oat_location_option; |
| |
| execl(dex2oat, dex2oat, |
| "--runtime-arg", "-Xms64m", |
| "--runtime-arg", "-Xmx64m", |
| "--runtime-arg", "-classpath", |
| "--runtime-arg", class_path, |
| boot_image_option, |
| dex_file_option, |
| oat_fd_option, |
| oat_location_option, |
| NULL); |
| |
| PLOG(FATAL) << "execl(" << dex2oat << ") failed"; |
| return false; |
| } else { |
| // wait for dex2oat to finish |
| int status; |
| pid_t got_pid = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0)); |
| if (got_pid != pid) { |
| PLOG(ERROR) << "waitpid failed: wanted " << pid << ", got " << got_pid; |
| return false; |
| } |
| if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { |
| LOG(ERROR) << dex2oat << " failed with dex-file=" << dex_filename; |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| void ClassLinker::RegisterOatFile(const OatFile& oat_file) { |
| MutexLock mu(dex_lock_); |
| RegisterOatFileLocked(oat_file); |
| } |
| |
| void ClassLinker::RegisterOatFileLocked(const OatFile& oat_file) { |
| dex_lock_.AssertHeld(); |
| oat_files_.push_back(&oat_file); |
| } |
| |
| OatFile* ClassLinker::OpenOat(const ImageSpace* space) { |
| MutexLock mu(dex_lock_); |
| const Runtime* runtime = Runtime::Current(); |
| const ImageHeader& image_header = space->GetImageHeader(); |
| // Grab location but don't use Object::AsString as we haven't yet initialized the roots to |
| // check the down cast |
| String* oat_location = down_cast<String*>(image_header.GetImageRoot(ImageHeader::kOatLocation)); |
| std::string oat_filename; |
| oat_filename += runtime->GetHostPrefix(); |
| oat_filename += oat_location->ToModifiedUtf8(); |
| OatFile* oat_file = OatFile::Open(oat_filename, oat_filename, image_header.GetOatBegin()); |
| VLOG(startup) << "ClassLinker::OpenOat entering oat_filename=" << oat_filename; |
| if (oat_file == NULL) { |
| LOG(ERROR) << "Failed to open oat file " << oat_filename << " referenced from image."; |
| return NULL; |
| } |
| uint32_t oat_checksum = oat_file->GetOatHeader().GetChecksum(); |
| uint32_t image_oat_checksum = image_header.GetOatChecksum(); |
| if (oat_checksum != image_oat_checksum) { |
| LOG(ERROR) << "Failed to match oat file checksum " << std::hex << oat_checksum |
| << " to expected oat checksum " << std::hex << oat_checksum |
| << " in image"; |
| return NULL; |
| } |
| RegisterOatFileLocked(*oat_file); |
| VLOG(startup) << "ClassLinker::OpenOat exiting"; |
| return oat_file; |
| } |
| |
| const OatFile* ClassLinker::FindOpenedOatFileForDexFile(const DexFile& dex_file) { |
| return FindOpenedOatFileFromDexLocation(dex_file.GetLocation()); |
| } |
| |
| const OatFile* ClassLinker::FindOpenedOatFileFromDexLocation(const std::string& dex_location) { |
| for (size_t i = 0; i < oat_files_.size(); i++) { |
| const OatFile* oat_file = oat_files_[i]; |
| DCHECK(oat_file != NULL); |
| const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location, false); |
| if (oat_dex_file != NULL) { |
| return oat_file; |
| } |
| } |
| return NULL; |
| } |
| |
| class LockedFd { |
| public: |
| static LockedFd* CreateAndLock(std::string& name, mode_t mode) { |
| int fd = open(name.c_str(), O_CREAT | O_RDWR, mode); |
| if (fd == -1) { |
| PLOG(ERROR) << "Failed to open file '" << name << "'"; |
| return NULL; |
| } |
| fchmod(fd, mode); |
| |
| LOG(INFO) << "locking file " << name << " (fd=" << fd << ")"; |
| // try to lock non-blocking so we can log if we need may need to block |
| int result = flock(fd, LOCK_EX | LOCK_NB); |
| if (result == -1) { |
| LOG(WARNING) << "sleeping while locking file " << name; |
| // retry blocking |
| result = flock(fd, LOCK_EX); |
| } |
| if (result == -1) { |
| PLOG(ERROR) << "Failed to lock file '" << name << "'"; |
| close(fd); |
| return NULL; |
| } |
| return new LockedFd(fd); |
| } |
| |
| int GetFd() const { |
| return fd_; |
| } |
| |
| ~LockedFd() { |
| if (fd_ != -1) { |
| int result = flock(fd_, LOCK_UN); |
| if (result == -1) { |
| PLOG(WARNING) << "flock(" << fd_ << ", LOCK_UN) failed"; |
| } |
| close(fd_); |
| } |
| } |
| |
| private: |
| explicit LockedFd(int fd) : fd_(fd) {} |
| |
| int fd_; |
| }; |
| |
| static const DexFile* FindDexFileInOatLocation(const std::string& dex_location, |
| uint32_t dex_location_checksum, |
| const std::string& oat_location) { |
| UniquePtr<OatFile> oat_file(OatFile::Open(oat_location, oat_location, NULL)); |
| if (oat_file.get() == NULL) { |
| return NULL; |
| } |
| Runtime* runtime = Runtime::Current(); |
| const ImageHeader& image_header = runtime->GetHeap()->GetImageSpace()->GetImageHeader(); |
| if (oat_file->GetOatHeader().GetImageFileLocationChecksum() != image_header.GetOatChecksum()) { |
| return NULL; |
| } |
| const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location); |
| if (oat_dex_file == NULL) { |
| return NULL; |
| } |
| if (oat_dex_file->GetDexFileLocationChecksum() != dex_location_checksum) { |
| return NULL; |
| } |
| runtime->GetClassLinker()->RegisterOatFile(*oat_file.release()); |
| return oat_dex_file->OpenDexFile(); |
| } |
| |
| const DexFile* ClassLinker::FindOrCreateOatFileForDexLocation(const std::string& dex_location, |
| const std::string& oat_location) { |
| uint32_t dex_location_checksum; |
| if (!DexFile::GetChecksum(dex_location, dex_location_checksum)) { |
| LOG(ERROR) << "Failed to compute checksum '" << dex_location << "'"; |
| return NULL; |
| } |
| |
| // Check if we already have an up-to-date output file |
| const DexFile* dex_file = FindDexFileInOatLocation(dex_location, |
| dex_location_checksum, |
| oat_location); |
| if (dex_file != NULL) { |
| return dex_file; |
| } |
| |
| // Generate the output oat file for the dex file |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| UniquePtr<File> file(OS::OpenFile(oat_location.c_str(), true)); |
| if (file.get() == NULL) { |
| LOG(ERROR) << "Failed to create oat file: " << oat_location; |
| return NULL; |
| } |
| if (!class_linker->GenerateOatFile(dex_location, file->Fd(), oat_location)) { |
| LOG(ERROR) << "Failed to generate oat file: " << oat_location; |
| return NULL; |
| } |
| // Open the oat from file descriptor we passed to GenerateOatFile |
| if (lseek(file->Fd(), 0, SEEK_SET) != 0) { |
| LOG(ERROR) << "Failed to seek to start of generated oat file: " << oat_location; |
| return NULL; |
| } |
| const OatFile* oat_file = OatFile::Open(*file.get(), oat_location, NULL); |
| if (oat_file == NULL) { |
| LOG(ERROR) << "Failed to open generated oat file: " << oat_location; |
| return NULL; |
| } |
| class_linker->RegisterOatFile(*oat_file); |
| const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location); |
| if (oat_dex_file == NULL) { |
| LOG(ERROR) << "Failed to find dex file in generated oat file: " << oat_location; |
| return NULL; |
| } |
| return oat_dex_file->OpenDexFile(); |
| } |
| |
| const DexFile* ClassLinker::FindDexFileInOatFileFromDexLocation(const std::string& dex_location) { |
| MutexLock mu(dex_lock_); |
| |
| const OatFile* open_oat_file = FindOpenedOatFileFromDexLocation(dex_location); |
| if (open_oat_file != NULL) { |
| return open_oat_file->GetOatDexFile(dex_location)->OpenDexFile(); |
| } |
| |
| // Look for an existing file next to dex, assuming its up-to-date if found |
| std::string oat_filename(OatFile::DexFilenameToOatFilename(dex_location)); |
| const OatFile* oat_file = FindOatFileFromOatLocation(oat_filename); |
| if (oat_file != NULL) { |
| const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location); |
| CHECK(oat_dex_file != NULL) << oat_filename << " " << dex_location; |
| return oat_dex_file->OpenDexFile(); |
| } |
| // Look for an existing file in the art-cache, validating the result if found |
| // not found in /foo/bar/baz.oat? try /data/art-cache/foo@bar@baz.oat |
| std::string cache_location(GetArtCacheFilenameOrDie(oat_filename)); |
| oat_file = FindOatFileFromOatLocation(cache_location); |
| if (oat_file != NULL) { |
| uint32_t dex_location_checksum; |
| if (!DexFile::GetChecksum(dex_location, dex_location_checksum)) { |
| LOG(WARNING) << "Failed to compute checksum: " << dex_location; |
| return NULL; |
| } |
| |
| Runtime* runtime = Runtime::Current(); |
| const ImageHeader& image_header = runtime->GetHeap()->GetImageSpace()->GetImageHeader(); |
| uint32_t image_checksum = image_header.GetOatChecksum(); |
| bool image_check = (oat_file->GetOatHeader().GetImageFileLocationChecksum() == image_checksum); |
| |
| const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location); |
| CHECK(oat_dex_file != NULL) << oat_filename << " " << dex_location; |
| bool dex_check = (dex_location_checksum == oat_dex_file->GetDexFileLocationChecksum()); |
| |
| if (image_check && dex_check) { |
| return oat_file->GetOatDexFile(dex_location)->OpenDexFile(); |
| } |
| if (!image_check) { |
| std::string image_file(image_header.GetImageRoot( |
| ImageHeader::kOatLocation)->AsString()->ToModifiedUtf8()); |
| LOG(WARNING) << ".oat file " << oat_file->GetLocation() |
| << " checksum ( " << std::hex << oat_dex_file->GetDexFileLocationChecksum() |
| << ") mismatch with " << image_file |
| << " (" << std::hex << image_checksum << ")--- regenerating"; |
| } |
| if (!dex_check) { |
| LOG(WARNING) << ".oat file " << oat_file->GetLocation() |
| << " checksum ( " << std::hex << oat_dex_file->GetDexFileLocationChecksum() |
| << ") mismatch with " << dex_location |
| << " (" << std::hex << dex_location_checksum << ")--- regenerating"; |
| } |
| if (TEMP_FAILURE_RETRY(unlink(oat_file->GetLocation().c_str())) != 0) { |
| PLOG(FATAL) << "Failed to remove obsolete .oat file " << oat_file->GetLocation(); |
| } |
| } |
| LOG(INFO) << "Failed to open oat file from " << oat_filename << " or " << cache_location << "."; |
| |
| // Try to generate oat file if it wasn't found or was obsolete. |
| std::string oat_cache_filename(GetArtCacheFilenameOrDie(oat_filename)); |
| return FindOrCreateOatFileForDexLocation(dex_location, oat_cache_filename); |
| } |
| |
| const OatFile* ClassLinker::FindOpenedOatFileFromOatLocation(const std::string& oat_location) { |
| for (size_t i = 0; i < oat_files_.size(); i++) { |
| const OatFile* oat_file = oat_files_[i]; |
| DCHECK(oat_file != NULL); |
| if (oat_file->GetLocation() == oat_location) { |
| return oat_file; |
| } |
| } |
| return NULL; |
| } |
| |
| const OatFile* ClassLinker::FindOatFileFromOatLocation(const std::string& oat_location) { |
| MutexLock mu(dex_lock_); |
| const OatFile* oat_file = FindOpenedOatFileFromOatLocation(oat_location); |
| if (oat_file != NULL) { |
| return oat_file; |
| } |
| |
| oat_file = OatFile::Open(oat_location, oat_location, NULL); |
| if (oat_file == NULL) { |
| return NULL; |
| } |
| CHECK(oat_file != NULL) << oat_location; |
| RegisterOatFileLocked(*oat_file); |
| return oat_file; |
| } |
| |
| void ClassLinker::InitFromImage() { |
| VLOG(startup) << "ClassLinker::InitFromImage entering"; |
| CHECK(!init_done_); |
| |
| Heap* heap = Runtime::Current()->GetHeap(); |
| ImageSpace* space = heap->GetImageSpace(); |
| OatFile* oat_file = OpenOat(space); |
| CHECK(oat_file != NULL) << "Failed to open oat file for image"; |
| CHECK_EQ(oat_file->GetOatHeader().GetImageFileLocationChecksum(), 0U); |
| CHECK(oat_file->GetOatHeader().GetImageFileLocation() == ""); |
| Object* dex_caches_object = space->GetImageHeader().GetImageRoot(ImageHeader::kDexCaches); |
| ObjectArray<DexCache>* dex_caches = dex_caches_object->AsObjectArray<DexCache>(); |
| |
| // Special case of setting up the String class early so that we can test arbitrary objects |
| // as being Strings or not |
| Class* java_lang_String = space->GetImageHeader().GetImageRoot(ImageHeader::kClassRoots) |
| ->AsObjectArray<Class>()->Get(kJavaLangString); |
| String::SetClass(java_lang_String); |
| |
| CHECK_EQ(oat_file->GetOatHeader().GetDexFileCount(), |
| static_cast<uint32_t>(dex_caches->GetLength())); |
| for (int i = 0; i < dex_caches->GetLength(); i++) { |
| SirtRef<DexCache> dex_cache(dex_caches->Get(i)); |
| const std::string& dex_file_location(dex_cache->GetLocation()->ToModifiedUtf8()); |
| const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_file_location); |
| const DexFile* dex_file = oat_dex_file->OpenDexFile(); |
| if (dex_file == NULL) { |
| LOG(FATAL) << "Failed to open dex file " << dex_file_location |
| << " from within oat file " << oat_file->GetLocation(); |
| } |
| |
| CHECK_EQ(dex_file->GetLocationChecksum(), oat_dex_file->GetDexFileLocationChecksum()); |
| |
| AppendToBootClassPath(*dex_file, dex_cache); |
| } |
| |
| HeapBitmap* heap_bitmap = heap->GetLiveBits(); |
| DCHECK(heap_bitmap != NULL); |
| |
| // reinit clases_ table |
| heap_bitmap->Walk(InitFromImageCallback, this); |
| |
| // reinit class_roots_ |
| Object* class_roots_object = |
| heap->GetImageSpace()->GetImageHeader().GetImageRoot(ImageHeader::kClassRoots); |
| class_roots_ = class_roots_object->AsObjectArray<Class>(); |
| |
| // reinit array_iftable_ from any array class instance, they should be == |
| array_iftable_ = GetClassRoot(kObjectArrayClass)->GetIfTable(); |
| DCHECK(array_iftable_ == GetClassRoot(kBooleanArrayClass)->GetIfTable()); |
| // String class root was set above |
| Field::SetClass(GetClassRoot(kJavaLangReflectField)); |
| Method::SetClasses(GetClassRoot(kJavaLangReflectConstructor), GetClassRoot(kJavaLangReflectMethod)); |
| BooleanArray::SetArrayClass(GetClassRoot(kBooleanArrayClass)); |
| ByteArray::SetArrayClass(GetClassRoot(kByteArrayClass)); |
| CharArray::SetArrayClass(GetClassRoot(kCharArrayClass)); |
| DoubleArray::SetArrayClass(GetClassRoot(kDoubleArrayClass)); |
| FloatArray::SetArrayClass(GetClassRoot(kFloatArrayClass)); |
| IntArray::SetArrayClass(GetClassRoot(kIntArrayClass)); |
| LongArray::SetArrayClass(GetClassRoot(kLongArrayClass)); |
| ShortArray::SetArrayClass(GetClassRoot(kShortArrayClass)); |
| PathClassLoader::SetClass(GetClassRoot(kDalvikSystemPathClassLoader)); |
| Throwable::SetClass(GetClassRoot(kJavaLangThrowable)); |
| StackTraceElement::SetClass(GetClassRoot(kJavaLangStackTraceElement)); |
| |
| FinishInit(); |
| |
| VLOG(startup) << "ClassLinker::InitFromImage exiting"; |
| } |
| |
| void ClassLinker::InitFromImageCallback(Object* obj, void* arg) { |
| DCHECK(obj != NULL); |
| DCHECK(arg != NULL); |
| ClassLinker* class_linker = reinterpret_cast<ClassLinker*>(arg); |
| |
| if (obj->GetClass()->IsStringClass()) { |
| class_linker->intern_table_->RegisterStrong(obj->AsString()); |
| return; |
| } |
| if (obj->IsClass()) { |
| // restore class to ClassLinker::classes_ table |
| Class* klass = obj->AsClass(); |
| ClassHelper kh(klass, class_linker); |
| Class* existing = class_linker->InsertClass(kh.GetDescriptor(), klass, true); |
| DCHECK(existing == NULL) << kh.GetDescriptor(); |
| return; |
| } |
| } |
| |
| // Keep in sync with InitCallback. Anything we visit, we need to |
| // reinit references to when reinitializing a ClassLinker from a |
| // mapped image. |
| void ClassLinker::VisitRoots(Heap::RootVisitor* visitor, void* arg) const { |
| visitor(class_roots_, arg); |
| |
| for (size_t i = 0; i < dex_caches_.size(); i++) { |
| visitor(dex_caches_[i], arg); |
| } |
| |
| { |
| MutexLock mu(classes_lock_); |
| typedef Table::const_iterator It; // TODO: C++0x auto |
| for (It it = classes_.begin(), end = classes_.end(); it != end; ++it) { |
| visitor(it->second, arg); |
| } |
| // Note. we deliberately ignore the class roots in the image (held in image_classes_) |
| } |
| |
| visitor(array_iftable_, arg); |
| } |
| |
| void ClassLinker::VisitClasses(ClassVisitor* visitor, void* arg) const { |
| MutexLock mu(classes_lock_); |
| typedef Table::const_iterator It; // TODO: C++0x auto |
| for (It it = classes_.begin(), end = classes_.end(); it != end; ++it) { |
| if (!visitor(it->second, arg)) { |
| return; |
| } |
| } |
| for (It it = image_classes_.begin(), end = image_classes_.end(); it != end; ++it) { |
| if (!visitor(it->second, arg)) { |
| return; |
| } |
| } |
| } |
| |
| ClassLinker::~ClassLinker() { |
| String::ResetClass(); |
| Field::ResetClass(); |
| Method::ResetClasses(); |
| BooleanArray::ResetArrayClass(); |
| ByteArray::ResetArrayClass(); |
| CharArray::ResetArrayClass(); |
| DoubleArray::ResetArrayClass(); |
| FloatArray::ResetArrayClass(); |
| IntArray::ResetArrayClass(); |
| LongArray::ResetArrayClass(); |
| ShortArray::ResetArrayClass(); |
| PathClassLoader::ResetClass(); |
| Throwable::ResetClass(); |
| StackTraceElement::ResetClass(); |
| STLDeleteElements(&boot_class_path_); |
| STLDeleteElements(&oat_files_); |
| } |
| |
| DexCache* ClassLinker::AllocDexCache(const DexFile& dex_file) { |
| SirtRef<DexCache> dex_cache(down_cast<DexCache*>(AllocObjectArray<Object>(DexCache::LengthAsArray()))); |
| if (dex_cache.get() == NULL) { |
| return NULL; |
| } |
| SirtRef<String> location(intern_table_->InternStrong(dex_file.GetLocation().c_str())); |
| if (location.get() == NULL) { |
| return NULL; |
| } |
| SirtRef<ObjectArray<String> > strings(AllocObjectArray<String>(dex_file.NumStringIds())); |
| if (strings.get() == NULL) { |
| return NULL; |
| } |
| SirtRef<ObjectArray<Class> > types(AllocClassArray(dex_file.NumTypeIds())); |
| if (types.get() == NULL) { |
| return NULL; |
| } |
| SirtRef<ObjectArray<Method> > methods(AllocObjectArray<Method>(dex_file.NumMethodIds())); |
| if (methods.get() == NULL) { |
| return NULL; |
| } |
| SirtRef<ObjectArray<Field> > fields(AllocObjectArray<Field>(dex_file.NumFieldIds())); |
| if (fields.get() == NULL) { |
| return NULL; |
| } |
| SirtRef<ObjectArray<StaticStorageBase> > initialized_static_storage(AllocObjectArray<StaticStorageBase>(dex_file.NumTypeIds())); |
| if (initialized_static_storage.get() == NULL) { |
| return NULL; |
| } |
| |
| dex_cache->Init(location.get(), |
| strings.get(), |
| types.get(), |
| methods.get(), |
| fields.get(), |
| initialized_static_storage.get()); |
| return dex_cache.get(); |
| } |
| |
| InterfaceEntry* ClassLinker::AllocInterfaceEntry(Class* interface) { |
| DCHECK(interface->IsInterface()); |
| SirtRef<ObjectArray<Object> > array(AllocObjectArray<Object>(InterfaceEntry::LengthAsArray())); |
| SirtRef<InterfaceEntry> interface_entry(down_cast<InterfaceEntry*>(array.get())); |
| interface_entry->SetInterface(interface); |
| return interface_entry.get(); |
| } |
| |
| Class* ClassLinker::AllocClass(Class* java_lang_Class, size_t class_size) { |
| DCHECK_GE(class_size, sizeof(Class)); |
| Heap* heap = Runtime::Current()->GetHeap(); |
| SirtRef<Class> klass(heap->AllocObject(java_lang_Class, class_size)->AsClass()); |
| klass->SetPrimitiveType(Primitive::kPrimNot); // default to not being primitive |
| klass->SetClassSize(class_size); |
| return klass.get(); |
| } |
| |
| Class* ClassLinker::AllocClass(size_t class_size) { |
| return AllocClass(GetClassRoot(kJavaLangClass), class_size); |
| } |
| |
| Field* ClassLinker::AllocField() { |
| return down_cast<Field*>(GetClassRoot(kJavaLangReflectField)->AllocObject()); |
| } |
| |
| Method* ClassLinker::AllocMethod() { |
| return down_cast<Method*>(GetClassRoot(kJavaLangReflectMethod)->AllocObject()); |
| } |
| |
| ObjectArray<StackTraceElement>* ClassLinker::AllocStackTraceElementArray(size_t length) { |
| return ObjectArray<StackTraceElement>::Alloc( |
| GetClassRoot(kJavaLangStackTraceElementArrayClass), |
| length); |
| } |
| |
| Class* EnsureResolved(Class* klass) { |
| DCHECK(klass != NULL); |
| // Wait for the class if it has not already been linked. |
| Thread* self = Thread::Current(); |
| if (!klass->IsResolved() && !klass->IsErroneous()) { |
| ObjectLock lock(klass); |
| // Check for circular dependencies between classes. |
| if (!klass->IsResolved() && klass->GetClinitThreadId() == self->GetTid()) { |
| self->ThrowNewException("Ljava/lang/ClassCircularityError;", |
| PrettyDescriptor(klass).c_str()); |
| klass->SetStatus(Class::kStatusError); |
| return NULL; |
| } |
| // Wait for the pending initialization to complete. |
| while (!klass->IsResolved() && !klass->IsErroneous()) { |
| lock.Wait(); |
| } |
| } |
| if (klass->IsErroneous()) { |
| ThrowEarlierClassFailure(klass); |
| return NULL; |
| } |
| // Return the loaded class. No exceptions should be pending. |
| CHECK(klass->IsResolved()) << PrettyClass(klass); |
| CHECK(!self->IsExceptionPending()) |
| << PrettyClass(klass) << " " << PrettyTypeOf(self->GetException()); |
| return klass; |
| } |
| |
| Class* ClassLinker::FindSystemClass(const char* descriptor) { |
| return FindClass(descriptor, NULL); |
| } |
| |
| Class* ClassLinker::FindClass(const char* descriptor, const ClassLoader* class_loader) { |
| DCHECK_NE(*descriptor, '\0') << "descriptor is empty string"; |
| Thread* self = Thread::Current(); |
| DCHECK(self != NULL); |
| CHECK(!self->IsExceptionPending()) << PrettyTypeOf(self->GetException()); |
| if (descriptor[1] == '\0') { |
| // only the descriptors of primitive types should be 1 character long, also avoid class lookup |
| // for primitive classes that aren't backed by dex files. |
| return FindPrimitiveClass(descriptor[0]); |
| } |
| // Find the class in the loaded classes table. |
| Class* klass = LookupClass(descriptor, class_loader); |
| if (klass != NULL) { |
| return EnsureResolved(klass); |
| } |
| // Class is not yet loaded. |
| if (descriptor[0] == '[') { |
| return CreateArrayClass(descriptor, class_loader); |
| |
| } else if (class_loader == NULL) { |
| DexFile::ClassPathEntry pair = DexFile::FindInClassPath(descriptor, boot_class_path_); |
| if (pair.second != NULL) { |
| return DefineClass(descriptor, NULL, *pair.first, *pair.second); |
| } |
| |
| } else if (Runtime::Current()->UseCompileTimeClassPath()) { |
| // first try the boot class path |
| Class* system_class = FindSystemClass(descriptor); |
| if (system_class != NULL) { |
| return system_class; |
| } |
| CHECK(self->IsExceptionPending()); |
| self->ClearException(); |
| |
| // next try the compile time class path |
| const std::vector<const DexFile*>& class_path |
| = Runtime::Current()->GetCompileTimeClassPath(class_loader); |
| DexFile::ClassPathEntry pair = DexFile::FindInClassPath(descriptor, class_path); |
| if (pair.second != NULL) { |
| return DefineClass(descriptor, class_loader, *pair.first, *pair.second); |
| } |
| |
| } else { |
| std::string class_name_string(DescriptorToDot(descriptor)); |
| ScopedThreadStateChange tsc(self, Thread::kNative); |
| JNIEnv* env = self->GetJniEnv(); |
| ScopedLocalRef<jclass> c(env, AddLocalReference<jclass>(env, GetClassRoot(kJavaLangClassLoader))); |
| CHECK(c.get() != NULL); |
| // TODO: cache method? |
| jmethodID mid = env->GetMethodID(c.get(), "loadClass", "(Ljava/lang/String;)Ljava/lang/Class;"); |
| CHECK(mid != NULL); |
| ScopedLocalRef<jobject> class_name_object(env, env->NewStringUTF(class_name_string.c_str())); |
| if (class_name_object.get() == NULL) { |
| return NULL; |
| } |
| ScopedLocalRef<jobject> class_loader_object(env, AddLocalReference<jobject>(env, class_loader)); |
| CHECK(class_loader_object.get() != NULL); |
| ScopedLocalRef<jobject> result(env, env->CallObjectMethod(class_loader_object.get(), mid, |
| class_name_object.get())); |
| if (env->ExceptionCheck()) { |
| // If the ClassLoader threw, pass that exception up. |
| return NULL; |
| } else if (result.get() == NULL) { |
| // broken loader - throw NPE to be compatible with Dalvik |
| ThrowNullPointerException("ClassLoader.loadClass returned null for %s", |
| class_name_string.c_str()); |
| return NULL; |
| } else { |
| // success, return Class* |
| return Decode<Class*>(env, result.get()); |
| } |
| } |
| |
| ThrowNoClassDefFoundError("Class %s not found", PrintableString(StringPiece(descriptor)).c_str()); |
| return NULL; |
| } |
| |
| Class* ClassLinker::DefineClass(const StringPiece& descriptor, |
| const ClassLoader* class_loader, |
| const DexFile& dex_file, |
| const DexFile::ClassDef& dex_class_def) { |
| SirtRef<Class> klass(NULL); |
| // Load the class from the dex file. |
| if (!init_done_) { |
| // finish up init of hand crafted class_roots_ |
| if (descriptor == "Ljava/lang/Object;") { |
| klass.reset(GetClassRoot(kJavaLangObject)); |
| } else if (descriptor == "Ljava/lang/Class;") { |
| klass.reset(GetClassRoot(kJavaLangClass)); |
| } else if (descriptor == "Ljava/lang/String;") { |
| klass.reset(GetClassRoot(kJavaLangString)); |
| } else if (descriptor == "Ljava/lang/reflect/Constructor;") { |
| klass.reset(GetClassRoot(kJavaLangReflectConstructor)); |
| } else if (descriptor == "Ljava/lang/reflect/Field;") { |
| klass.reset(GetClassRoot(kJavaLangReflectField)); |
| } else if (descriptor == "Ljava/lang/reflect/Method;") { |
| klass.reset(GetClassRoot(kJavaLangReflectMethod)); |
| } else { |
| klass.reset(AllocClass(SizeOfClass(dex_file, dex_class_def))); |
| } |
| } else { |
| klass.reset(AllocClass(SizeOfClass(dex_file, dex_class_def))); |
| } |
| klass->SetDexCache(FindDexCache(dex_file)); |
| LoadClass(dex_file, dex_class_def, klass, class_loader); |
| // Check for a pending exception during load |
| Thread* self = Thread::Current(); |
| if (self->IsExceptionPending()) { |
| klass->SetStatus(Class::kStatusError); |
| return NULL; |
| } |
| ObjectLock lock(klass.get()); |
| klass->SetClinitThreadId(self->GetTid()); |
| // Add the newly loaded class to the loaded classes table. |
| SirtRef<Class> existing(InsertClass(descriptor, klass.get(), false)); |
| if (existing.get() != NULL) { |
| // We failed to insert because we raced with another thread. |
| return EnsureResolved(existing.get()); |
| } |
| // Finish loading (if necessary) by finding parents |
| CHECK(!klass->IsLoaded()); |
| if (!LoadSuperAndInterfaces(klass, dex_file)) { |
| // Loading failed. |
| klass->SetStatus(Class::kStatusError); |
| lock.NotifyAll(); |
| return NULL; |
| } |
| CHECK(klass->IsLoaded()); |
| // Link the class (if necessary) |
| CHECK(!klass->IsResolved()); |
| if (!LinkClass(klass, NULL)) { |
| // Linking failed. |
| klass->SetStatus(Class::kStatusError); |
| lock.NotifyAll(); |
| return NULL; |
| } |
| CHECK(klass->IsResolved()); |
| |
| /* |
| * We send CLASS_PREPARE events to the debugger from here. The |
| * definition of "preparation" is creating the static fields for a |
| * class and initializing them to the standard default values, but not |
| * executing any code (that comes later, during "initialization"). |
| * |
| * We did the static preparation in LinkClass. |
| * |
| * The class has been prepared and resolved but possibly not yet verified |
| * at this point. |
| */ |
| Dbg::PostClassPrepare(klass.get()); |
| |
| return klass.get(); |
| } |
| |
| // Precomputes size that will be needed for Class, matching LinkStaticFields |
| size_t ClassLinker::SizeOfClass(const DexFile& dex_file, |
| const DexFile::ClassDef& dex_class_def) { |
| const byte* class_data = dex_file.GetClassData(dex_class_def); |
| size_t num_ref = 0; |
| size_t num_32 = 0; |
| size_t num_64 = 0; |
| if (class_data != NULL) { |
| for (ClassDataItemIterator it(dex_file, class_data); it.HasNextStaticField(); it.Next()) { |
| const DexFile::FieldId& field_id = dex_file.GetFieldId(it.GetMemberIndex()); |
| const char* descriptor = dex_file.GetFieldTypeDescriptor(field_id); |
| char c = descriptor[0]; |
| if (c == 'L' || c == '[') { |
| num_ref++; |
| } else if (c == 'J' || c == 'D') { |
| num_64++; |
| } else { |
| num_32++; |
| } |
| } |
| } |
| // start with generic class data |
| size_t size = sizeof(Class); |
| // follow with reference fields which must be contiguous at start |
| size += (num_ref * sizeof(uint32_t)); |
| // if there are 64-bit fields to add, make sure they are aligned |
| if (num_64 != 0 && size != RoundUp(size, 8)) { // for 64-bit alignment |
| if (num_32 != 0) { |
| // use an available 32-bit field for padding |
| num_32--; |
| } |
| size += sizeof(uint32_t); // either way, we are adding a word |
| DCHECK_EQ(size, RoundUp(size, 8)); |
| } |
| // tack on any 64-bit fields now that alignment is assured |
| size += (num_64 * sizeof(uint64_t)); |
| // tack on any remaining 32-bit fields |
| size += (num_32 * sizeof(uint32_t)); |
| return size; |
| } |
| |
| const OatFile::OatClass* ClassLinker::GetOatClass(const DexFile& dex_file, const char* descriptor) { |
| DCHECK(descriptor != NULL); |
| const OatFile* oat_file = FindOpenedOatFileForDexFile(dex_file); |
| CHECK(oat_file != NULL) << dex_file.GetLocation() << " " << descriptor; |
| const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_file.GetLocation()); |
| CHECK(oat_dex_file != NULL) << dex_file.GetLocation() << " " << descriptor; |
| uint32_t class_def_index; |
| bool found = dex_file.FindClassDefIndex(descriptor, class_def_index); |
| CHECK(found) << dex_file.GetLocation() << " " << descriptor; |
| const OatFile::OatClass* oat_class = oat_dex_file->GetOatClass(class_def_index); |
| CHECK(oat_class != NULL) << dex_file.GetLocation() << " " << descriptor; |
| return oat_class; |
| } |
| |
| // Special case to get oat code without overwriting a trampoline. |
| const void* ClassLinker::GetOatCodeFor(const Method* method) { |
| CHECK(Runtime::Current()->IsCompiler() || method->GetDeclaringClass()->IsInitializing()); |
| // Although we overwrite the trampoline of non-static methods, we may get here via the resolution |
| // method for direct methods (or virtual methods made direct). |
| Class* declaring_class = method->GetDeclaringClass(); |
| size_t oat_method_index; |
| if (method->IsStatic() || method->IsDirect()) { |
| // Simple case where the oat method index was stashed at load time. |
| oat_method_index = method->GetMethodIndex(); |
| } else { |
| // We're invoking a virtual method directly (thanks to sharpening), compute the oat_method_index |
| // by search for its position in the declared virtual methods. |
| oat_method_index = declaring_class->NumDirectMethods(); |
| size_t end = declaring_class->NumVirtualMethods(); |
| bool found = false; |
| for (size_t i = 0; i < end; i++) { |
| if (declaring_class->GetVirtualMethod(i) == method) { |
| found = true; |
| break; |
| } |
| oat_method_index++; |
| } |
| CHECK(found) << "Didn't find oat method index for virtual method: " << PrettyMethod(method); |
| } |
| ClassHelper kh(declaring_class); |
| UniquePtr<const OatFile::OatClass> oat_class(GetOatClass(kh.GetDexFile(), kh.GetDescriptor())); |
| CHECK(oat_class.get() != NULL); |
| return oat_class->GetOatMethod(oat_method_index).GetCode(); |
| } |
| |
| void ClassLinker::FixupStaticTrampolines(Class* klass) { |
| ClassHelper kh(klass); |
| const DexFile::ClassDef* dex_class_def = kh.GetClassDef(); |
| CHECK(dex_class_def != NULL); |
| const DexFile& dex_file = kh.GetDexFile(); |
| const byte* class_data = dex_file.GetClassData(*dex_class_def); |
| if (class_data == NULL) { |
| return; // no fields or methods - for example a marker interface |
| } |
| if (!Runtime::Current()->IsStarted() || Runtime::Current()->UseCompileTimeClassPath()) { |
| // OAT file unavailable |
| return; |
| } |
| UniquePtr<const OatFile::OatClass> oat_class(GetOatClass(dex_file, kh.GetDescriptor())); |
| CHECK(oat_class.get() != NULL); |
| ClassDataItemIterator it(dex_file, class_data); |
| // Skip fields |
| while (it.HasNextStaticField()) { |
| it.Next(); |
| } |
| while (it.HasNextInstanceField()) { |
| it.Next(); |
| } |
| size_t method_index = 0; |
| // Link the code of methods skipped by LinkCode |
| const void* trampoline = Runtime::Current()->GetResolutionStubArray(Runtime::kStaticMethod)->GetData(); |
| for (size_t i = 0; it.HasNextDirectMethod(); i++, it.Next()) { |
| Method* method = klass->GetDirectMethod(i); |
| if (Runtime::Current()->IsMethodTracingActive()) { |
| Trace* tracer = Runtime::Current()->GetTracer(); |
| if (tracer->GetSavedCodeFromMap(method) == trampoline) { |
| const void* code = oat_class->GetOatMethod(method_index).GetCode(); |
| tracer->ResetSavedCode(method); |
| method->SetCode(code); |
| tracer->SaveAndUpdateCode(method); |
| } |
| } else if (method->GetCode() == trampoline) { |
| const void* code = oat_class->GetOatMethod(method_index).GetCode(); |
| CHECK(code != NULL); |
| method->SetCode(code); |
| } |
| method_index++; |
| } |
| } |
| |
| void LinkCode(SirtRef<Method>& method, const OatFile::OatClass* oat_class, uint32_t method_index) { |
| // Every kind of method should at least get an invoke stub from the oat_method. |
| // non-abstract methods also get their code pointers. |
| const OatFile::OatMethod oat_method = oat_class->GetOatMethod(method_index); |
| oat_method.LinkMethodPointers(method.get()); |
| |
| Runtime* runtime = Runtime::Current(); |
| if (method->IsAbstract()) { |
| method->SetCode(runtime->GetAbstractMethodErrorStubArray()->GetData()); |
| return; |
| } |
| |
| if (method->IsStatic() && !method->IsConstructor()) { |
| // For static methods excluding the class initializer, install the trampoline |
| method->SetCode(runtime->GetResolutionStubArray(Runtime::kStaticMethod)->GetData()); |
| } |
| if (method->IsNative()) { |
| // unregistering restores the dlsym lookup stub |
| method->UnregisterNative(Thread::Current()); |
| } |
| |
| if (Runtime::Current()->IsMethodTracingActive()) { |
| Trace* tracer = Runtime::Current()->GetTracer(); |
| tracer->SaveAndUpdateCode(method.get()); |
| } |
| } |
| |
| void ClassLinker::LoadClass(const DexFile& dex_file, |
| const DexFile::ClassDef& dex_class_def, |
| SirtRef<Class>& klass, |
| const ClassLoader* class_loader) { |
| CHECK(klass.get() != NULL); |
| CHECK(klass->GetDexCache() != NULL); |
| CHECK_EQ(Class::kStatusNotReady, klass->GetStatus()); |
| const char* descriptor = dex_file.GetClassDescriptor(dex_class_def); |
| CHECK(descriptor != NULL); |
| |
| klass->SetClass(GetClassRoot(kJavaLangClass)); |
| uint32_t access_flags = dex_class_def.access_flags_; |
| // Make sure that none of our runtime-only flags are set. |
| CHECK_EQ(access_flags & ~kAccJavaFlagsMask, 0U); |
| klass->SetAccessFlags(access_flags); |
| klass->SetClassLoader(class_loader); |
| DCHECK_EQ(klass->GetPrimitiveType(), Primitive::kPrimNot); |
| klass->SetStatus(Class::kStatusIdx); |
| |
| klass->SetDexTypeIndex(dex_class_def.class_idx_); |
| |
| // Load fields fields. |
| const byte* class_data = dex_file.GetClassData(dex_class_def); |
| if (class_data == NULL) { |
| return; // no fields or methods - for example a marker interface |
| } |
| ClassDataItemIterator it(dex_file, class_data); |
| if (it.NumStaticFields() != 0) { |
| klass->SetSFields(AllocObjectArray<Field>(it.NumStaticFields())); |
| } |
| if (it.NumInstanceFields() != 0) { |
| klass->SetIFields(AllocObjectArray<Field>(it.NumInstanceFields())); |
| } |
| for (size_t i = 0; it.HasNextStaticField(); i++, it.Next()) { |
| SirtRef<Field> sfield(AllocField()); |
| klass->SetStaticField(i, sfield.get()); |
| LoadField(dex_file, it, klass, sfield); |
| } |
| for (size_t i = 0; it.HasNextInstanceField(); i++, it.Next()) { |
| SirtRef<Field> ifield(AllocField()); |
| klass->SetInstanceField(i, ifield.get()); |
| LoadField(dex_file, it, klass, ifield); |
| } |
| |
| UniquePtr<const OatFile::OatClass> oat_class; |
| if (Runtime::Current()->IsStarted() && !Runtime::Current()->UseCompileTimeClassPath()) { |
| oat_class.reset(GetOatClass(dex_file, descriptor)); |
| } |
| |
| // Load methods. |
| if (it.NumDirectMethods() != 0) { |
| // TODO: append direct methods to class object |
| klass->SetDirectMethods(AllocObjectArray<Method>(it.NumDirectMethods())); |
| } |
| if (it.NumVirtualMethods() != 0) { |
| // TODO: append direct methods to class object |
| klass->SetVirtualMethods(AllocObjectArray<Method>(it.NumVirtualMethods())); |
| } |
| size_t class_def_method_index = 0; |
| for (size_t i = 0; it.HasNextDirectMethod(); i++, it.Next()) { |
| SirtRef<Method> method(AllocMethod()); |
| klass->SetDirectMethod(i, method.get()); |
| LoadMethod(dex_file, it, klass, method); |
| if (oat_class.get() != NULL) { |
| LinkCode(method, oat_class.get(), class_def_method_index); |
| } |
| method->SetMethodIndex(class_def_method_index); |
| class_def_method_index++; |
| } |
| for (size_t i = 0; it.HasNextVirtualMethod(); i++, it.Next()) { |
| SirtRef<Method> method(AllocMethod()); |
| klass->SetVirtualMethod(i, method.get()); |
| LoadMethod(dex_file, it, klass, method); |
| DCHECK_EQ(class_def_method_index, it.NumDirectMethods() + i); |
| if (oat_class.get() != NULL) { |
| LinkCode(method, oat_class.get(), class_def_method_index); |
| } |
| class_def_method_index++; |
| } |
| DCHECK(!it.HasNext()); |
| } |
| |
| void ClassLinker::LoadField(const DexFile& /*dex_file*/, const ClassDataItemIterator& it, |
| SirtRef<Class>& klass, SirtRef<Field>& dst) { |
| uint32_t field_idx = it.GetMemberIndex(); |
| dst->SetDexFieldIndex(field_idx); |
| dst->SetDeclaringClass(klass.get()); |
| dst->SetAccessFlags(it.GetMemberAccessFlags()); |
| } |
| |
| void ClassLinker::LoadMethod(const DexFile& dex_file, const ClassDataItemIterator& it, |
| SirtRef<Class>& klass, SirtRef<Method>& dst) { |
| uint32_t dex_method_idx = it.GetMemberIndex(); |
| dst->SetDexMethodIndex(dex_method_idx); |
| const DexFile::MethodId& method_id = dex_file.GetMethodId(dex_method_idx); |
| dst->SetDeclaringClass(klass.get()); |
| |
| |
| StringPiece method_name(dex_file.GetMethodName(method_id)); |
| if (method_name == "<init>") { |
| dst->SetClass(GetClassRoot(kJavaLangReflectConstructor)); |
| } |
| |
| if (method_name == "finalize") { |
| // Create the prototype for a signature of "()V" |
| const DexFile::StringId* void_string_id = dex_file.FindStringId("V"); |
| if (void_string_id != NULL) { |
| const DexFile::TypeId* void_type_id = |
| dex_file.FindTypeId(dex_file.GetIndexForStringId(*void_string_id)); |
| if (void_type_id != NULL) { |
| std::vector<uint16_t> no_args; |
| const DexFile::ProtoId* finalizer_proto = |
| dex_file.FindProtoId(dex_file.GetIndexForTypeId(*void_type_id), no_args); |
| if (finalizer_proto != NULL) { |
| // We have the prototype in the dex file |
| if (klass->GetClassLoader() != NULL) { // All non-boot finalizer methods are flagged |
| klass->SetFinalizable(); |
| } else { |
| StringPiece klass_descriptor(dex_file.StringByTypeIdx(klass->GetDexTypeIndex())); |
| // The Enum class declares a "final" finalize() method to prevent subclasses from |
| // introducing a finalizer. We don't want to set the finalizable flag for Enum or its |
| // subclasses, so we exclude it here. |
| // We also want to avoid setting the flag on Object, where we know that finalize() is |
| // empty. |
| if (klass_descriptor != "Ljava/lang/Object;" && |
| klass_descriptor != "Ljava/lang/Enum;") { |
| klass->SetFinalizable(); |
| } |
| } |
| } |
| } |
| } |
| } |
| dst->SetCodeItemOffset(it.GetMethodCodeItemOffset()); |
| dst->SetAccessFlags(it.GetMemberAccessFlags()); |
| |
| dst->SetDexCacheStrings(klass->GetDexCache()->GetStrings()); |
| dst->SetDexCacheResolvedMethods(klass->GetDexCache()->GetResolvedMethods()); |
| dst->SetDexCacheResolvedTypes(klass->GetDexCache()->GetResolvedTypes()); |
| dst->SetDexCacheInitializedStaticStorage(klass->GetDexCache()->GetInitializedStaticStorage()); |
| } |
| |
| void ClassLinker::AppendToBootClassPath(const DexFile& dex_file) { |
| SirtRef<DexCache> dex_cache(AllocDexCache(dex_file)); |
| AppendToBootClassPath(dex_file, dex_cache); |
| } |
| |
| void ClassLinker::AppendToBootClassPath(const DexFile& dex_file, SirtRef<DexCache>& dex_cache) { |
| CHECK(dex_cache.get() != NULL) << dex_file.GetLocation(); |
| boot_class_path_.push_back(&dex_file); |
| RegisterDexFile(dex_file, dex_cache); |
| } |
| |
| bool ClassLinker::IsDexFileRegisteredLocked(const DexFile& dex_file) const { |
| dex_lock_.AssertHeld(); |
| for (size_t i = 0; i != dex_files_.size(); ++i) { |
| if (dex_files_[i] == &dex_file) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| bool ClassLinker::IsDexFileRegistered(const DexFile& dex_file) const { |
| MutexLock mu(dex_lock_); |
| return IsDexFileRegisteredLocked(dex_file); |
| } |
| |
| void ClassLinker::RegisterDexFileLocked(const DexFile& dex_file, SirtRef<DexCache>& dex_cache) { |
| dex_lock_.AssertHeld(); |
| CHECK(dex_cache.get() != NULL) << dex_file.GetLocation(); |
| CHECK(dex_cache->GetLocation()->Equals(dex_file.GetLocation())); |
| dex_files_.push_back(&dex_file); |
| dex_caches_.push_back(dex_cache.get()); |
| } |
| |
| void ClassLinker::RegisterDexFile(const DexFile& dex_file) { |
| { |
| MutexLock mu(dex_lock_); |
| if (IsDexFileRegisteredLocked(dex_file)) { |
| return; |
| } |
| } |
| // Don't alloc while holding the lock, since allocation may need to |
| // suspend all threads and another thread may need the dex_lock_ to |
| // get to a suspend point. |
| SirtRef<DexCache> dex_cache(AllocDexCache(dex_file)); |
| { |
| MutexLock mu(dex_lock_); |
| if (IsDexFileRegisteredLocked(dex_file)) { |
| return; |
| } |
| RegisterDexFileLocked(dex_file, dex_cache); |
| } |
| } |
| |
| void ClassLinker::RegisterDexFile(const DexFile& dex_file, SirtRef<DexCache>& dex_cache) { |
| MutexLock mu(dex_lock_); |
| RegisterDexFileLocked(dex_file, dex_cache); |
| } |
| |
| const DexFile& ClassLinker::FindDexFile(const DexCache* dex_cache) const { |
| CHECK(dex_cache != NULL); |
| MutexLock mu(dex_lock_); |
| for (size_t i = 0; i != dex_caches_.size(); ++i) { |
| if (dex_caches_[i] == dex_cache) { |
| return *dex_files_[i]; |
| } |
| } |
| CHECK(false) << "Failed to find DexFile for DexCache " << dex_cache->GetLocation()->ToModifiedUtf8(); |
| return *dex_files_[-1]; |
| } |
| |
| DexCache* ClassLinker::FindDexCache(const DexFile& dex_file) const { |
| MutexLock mu(dex_lock_); |
| for (size_t i = 0; i != dex_files_.size(); ++i) { |
| if (dex_files_[i] == &dex_file) { |
| return dex_caches_[i]; |
| } |
| } |
| CHECK(false) << "Failed to find DexCache for DexFile " << dex_file.GetLocation(); |
| return NULL; |
| } |
| |
| void ClassLinker::FixupDexCaches(Method* resolution_method) const { |
| MutexLock mu(dex_lock_); |
| for (size_t i = 0; i != dex_caches_.size(); ++i) { |
| dex_caches_[i]->Fixup(resolution_method); |
| } |
| } |
| |
| Class* ClassLinker::InitializePrimitiveClass(Class* primitive_class, |
| const char* descriptor, |
| Primitive::Type type) { |
| // TODO: deduce one argument from the other |
| CHECK(primitive_class != NULL); |
| primitive_class->SetAccessFlags(kAccPublic | kAccFinal | kAccAbstract); |
| primitive_class->SetPrimitiveType(type); |
| primitive_class->SetStatus(Class::kStatusInitialized); |
| Class* existing = InsertClass(descriptor, primitive_class, false); |
| CHECK(existing == NULL) << "InitPrimitiveClass(" << descriptor << ") failed"; |
| return primitive_class; |
| } |
| |
| // Create an array class (i.e. the class object for the array, not the |
| // array itself). "descriptor" looks like "[C" or "[[[[B" or |
| // "[Ljava/lang/String;". |
| // |
| // If "descriptor" refers to an array of primitives, look up the |
| // primitive type's internally-generated class object. |
| // |
| // "class_loader" is the class loader of the class that's referring to |
| // us. It's used to ensure that we're looking for the element type in |
| // the right context. It does NOT become the class loader for the |
| // array class; that always comes from the base element class. |
| // |
| // Returns NULL with an exception raised on failure. |
| Class* ClassLinker::CreateArrayClass(const std::string& descriptor, const ClassLoader* class_loader) { |
| CHECK_EQ('[', descriptor[0]); |
| |
| // Identify the underlying component type |
| Class* component_type = FindClass(descriptor.substr(1).c_str(), class_loader); |
| if (component_type == NULL) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return NULL; |
| } |
| |
| // See if the component type is already loaded. Array classes are |
| // always associated with the class loader of their underlying |
| // element type -- an array of Strings goes with the loader for |
| // java/lang/String -- so we need to look for it there. (The |
| // caller should have checked for the existence of the class |
| // before calling here, but they did so with *their* class loader, |
| // not the component type's loader.) |
| // |
| // If we find it, the caller adds "loader" to the class' initiating |
| // loader list, which should prevent us from going through this again. |
| // |
| // This call is unnecessary if "loader" and "component_type->GetClassLoader()" |
| // are the same, because our caller (FindClass) just did the |
| // lookup. (Even if we get this wrong we still have correct behavior, |
| // because we effectively do this lookup again when we add the new |
| // class to the hash table --- necessary because of possible races with |
| // other threads.) |
| if (class_loader != component_type->GetClassLoader()) { |
| Class* new_class = LookupClass(descriptor.c_str(), component_type->GetClassLoader()); |
| if (new_class != NULL) { |
| return new_class; |
| } |
| } |
| |
| // Fill out the fields in the Class. |
| // |
| // It is possible to execute some methods against arrays, because |
| // all arrays are subclasses of java_lang_Object_, so we need to set |
| // up a vtable. We can just point at the one in java_lang_Object_. |
| // |
| // Array classes are simple enough that we don't need to do a full |
| // link step. |
| |
| SirtRef<Class> new_class(NULL); |
| if (!init_done_) { |
| // Classes that were hand created, ie not by FindSystemClass |
| if (descriptor == "[Ljava/lang/Class;") { |
| new_class.reset(GetClassRoot(kClassArrayClass)); |
| } else if (descriptor == "[Ljava/lang/Object;") { |
| new_class.reset(GetClassRoot(kObjectArrayClass)); |
| } else if (descriptor == "[C") { |
| new_class.reset(GetClassRoot(kCharArrayClass)); |
| } else if (descriptor == "[I") { |
| new_class.reset(GetClassRoot(kIntArrayClass)); |
| } |
| } |
| if (new_class.get() == NULL) { |
| new_class.reset(AllocClass(sizeof(Class))); |
| if (new_class.get() == NULL) { |
| return NULL; |
| } |
| new_class->SetComponentType(component_type); |
| } |
| DCHECK(new_class->GetComponentType() != NULL); |
| Class* java_lang_Object = GetClassRoot(kJavaLangObject); |
| new_class->SetSuperClass(java_lang_Object); |
| new_class->SetVTable(java_lang_Object->GetVTable()); |
| new_class->SetPrimitiveType(Primitive::kPrimNot); |
| new_class->SetClassLoader(component_type->GetClassLoader()); |
| new_class->SetStatus(Class::kStatusInitialized); |
| // don't need to set new_class->SetObjectSize(..) |
| // because Object::SizeOf delegates to Array::SizeOf |
| |
| |
| // All arrays have java/lang/Cloneable and java/io/Serializable as |
| // interfaces. We need to set that up here, so that stuff like |
| // "instanceof" works right. |
| // |
| // Note: The GC could run during the call to FindSystemClass, |
| // so we need to make sure the class object is GC-valid while we're in |
| // there. Do this by clearing the interface list so the GC will just |
| // think that the entries are null. |
| |
| |
| // Use the single, global copies of "interfaces" and "iftable" |
| // (remember not to free them for arrays). |
| CHECK(array_iftable_ != NULL); |
| new_class->SetIfTable(array_iftable_); |
| |
| // Inherit access flags from the component type. Arrays can't be |
| // used as a superclass or interface, so we want to add "final" |
| // and remove "interface". |
| // |
| // Don't inherit any non-standard flags (e.g., kAccFinal) |
| // from component_type. We assume that the array class does not |
| // override finalize(). |
| new_class->SetAccessFlags(((new_class->GetComponentType()->GetAccessFlags() & |
| ~kAccInterface) | kAccFinal) & kAccJavaFlagsMask); |
| |
| Class* existing = InsertClass(descriptor, new_class.get(), false); |
| if (existing == NULL) { |
| return new_class.get(); |
| } |
| // Another thread must have loaded the class after we |
| // started but before we finished. Abandon what we've |
| // done. |
| // |
| // (Yes, this happens.) |
| |
| return existing; |
| } |
| |
| Class* ClassLinker::FindPrimitiveClass(char type) { |
| switch (Primitive::GetType(type)) { |
| case Primitive::kPrimByte: |
| return GetClassRoot(kPrimitiveByte); |
| case Primitive::kPrimChar: |
| return GetClassRoot(kPrimitiveChar); |
| case Primitive::kPrimDouble: |
| return GetClassRoot(kPrimitiveDouble); |
| case Primitive::kPrimFloat: |
| return GetClassRoot(kPrimitiveFloat); |
| case Primitive::kPrimInt: |
| return GetClassRoot(kPrimitiveInt); |
| case Primitive::kPrimLong: |
| return GetClassRoot(kPrimitiveLong); |
| case Primitive::kPrimShort: |
| return GetClassRoot(kPrimitiveShort); |
| case Primitive::kPrimBoolean: |
| return GetClassRoot(kPrimitiveBoolean); |
| case Primitive::kPrimVoid: |
| return GetClassRoot(kPrimitiveVoid); |
| case Primitive::kPrimNot: |
| break; |
| } |
| std::string printable_type(PrintableChar(type)); |
| ThrowNoClassDefFoundError("Not a primitive type: %s", printable_type.c_str()); |
| return NULL; |
| } |
| |
| Class* ClassLinker::InsertClass(const StringPiece& descriptor, Class* klass, bool image_class) { |
| if (VLOG_IS_ON(class_linker)) { |
| DexCache* dex_cache = klass->GetDexCache(); |
| std::string source; |
| if (dex_cache != NULL) { |
| source += " from "; |
| source += dex_cache->GetLocation()->ToModifiedUtf8(); |
| } |
| LOG(INFO) << "Loaded class " << descriptor << source; |
| } |
| size_t hash = StringPieceHash()(descriptor); |
| MutexLock mu(classes_lock_); |
| Table& classes = image_class ? image_classes_ : classes_; |
| Class* existing = LookupClass(descriptor.data(), klass->GetClassLoader(), hash, classes); |
| #ifndef NDEBUG |
| // Check we don't have the class in the other table in error |
| Table& other_classes = image_class ? classes_ : image_classes_; |
| CHECK(LookupClass(descriptor.data(), klass->GetClassLoader(), hash, other_classes) == NULL); |
| #endif |
| if (existing != NULL) { |
| return existing; |
| } |
| classes.insert(std::make_pair(hash, klass)); |
| return NULL; |
| } |
| |
| bool ClassLinker::RemoveClass(const char* descriptor, const ClassLoader* class_loader) { |
| size_t hash = Hash(descriptor); |
| MutexLock mu(classes_lock_); |
| typedef Table::iterator It; // TODO: C++0x auto |
| // TODO: determine if its better to search classes_ or image_classes_ first |
| ClassHelper kh; |
| for (It it = classes_.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) { |
| Class* klass = it->second; |
| kh.ChangeClass(klass); |
| if (strcmp(kh.GetDescriptor(), descriptor) == 0 && klass->GetClassLoader() == class_loader) { |
| classes_.erase(it); |
| return true; |
| } |
| } |
| for (It it = image_classes_.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) { |
| Class* klass = it->second; |
| kh.ChangeClass(klass); |
| if (strcmp(kh.GetDescriptor(), descriptor) == 0 && klass->GetClassLoader() == class_loader) { |
| image_classes_.erase(it); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| Class* ClassLinker::LookupClass(const char* descriptor, const ClassLoader* class_loader) { |
| size_t hash = Hash(descriptor); |
| MutexLock mu(classes_lock_); |
| // TODO: determine if its better to search classes_ or image_classes_ first |
| Class* klass = LookupClass(descriptor, class_loader, hash, classes_); |
| if (klass != NULL) { |
| return klass; |
| } |
| return LookupClass(descriptor, class_loader, hash, image_classes_); |
| } |
| |
| Class* ClassLinker::LookupClass(const char* descriptor, const ClassLoader* class_loader, |
| size_t hash, const Table& classes) { |
| ClassHelper kh(NULL, this); |
| typedef Table::const_iterator It; // TODO: C++0x auto |
| for (It it = classes.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) { |
| Class* klass = it->second; |
| kh.ChangeClass(klass); |
| if (strcmp(descriptor, kh.GetDescriptor()) == 0 && klass->GetClassLoader() == class_loader) { |
| #ifndef NDEBUG |
| for (++it; it != end && it->first == hash; ++it) { |
| Class* klass2 = it->second; |
| kh.ChangeClass(klass2); |
| CHECK(!(strcmp(descriptor, kh.GetDescriptor()) == 0 && klass2->GetClassLoader() == class_loader)) |
| << PrettyClass(klass) << " " << klass << " " << klass->GetClassLoader() << " " |
| << PrettyClass(klass2) << " " << klass2 << " " << klass2->GetClassLoader(); |
| } |
| #endif |
| return klass; |
| } |
| } |
| return NULL; |
| } |
| |
| void ClassLinker::LookupClasses(const char* descriptor, std::vector<Class*>& classes) { |
| classes.clear(); |
| size_t hash = Hash(descriptor); |
| MutexLock mu(classes_lock_); |
| typedef Table::const_iterator It; // TODO: C++0x auto |
| // TODO: determine if its better to search classes_ or image_classes_ first |
| ClassHelper kh(NULL, this); |
| for (It it = classes_.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) { |
| Class* klass = it->second; |
| kh.ChangeClass(klass); |
| if (strcmp(descriptor, kh.GetDescriptor()) == 0) { |
| classes.push_back(klass); |
| } |
| } |
| for (It it = image_classes_.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) { |
| Class* klass = it->second; |
| kh.ChangeClass(klass); |
| if (strcmp(descriptor, kh.GetDescriptor()) == 0) { |
| classes.push_back(klass); |
| } |
| } |
| } |
| |
| #if !defined(NDEBUG) && !defined(ART_USE_LLVM_COMPILER) |
| static void CheckMethodsHaveGcMaps(Class* klass) { |
| if (!Runtime::Current()->IsStarted()) { |
| return; |
| } |
| for (size_t i = 0; i < klass->NumDirectMethods(); i++) { |
| Method* method = klass->GetDirectMethod(i); |
| if (!method->IsNative() && !method->IsAbstract()) { |
| CHECK(method->GetGcMap() != NULL) << PrettyMethod(method); |
| } |
| } |
| for (size_t i = 0; i < klass->NumVirtualMethods(); i++) { |
| Method* method = klass->GetVirtualMethod(i); |
| if (!method->IsNative() && !method->IsAbstract()) { |
| CHECK(method->GetGcMap() != NULL) << PrettyMethod(method); |
| } |
| } |
| } |
| #else |
| static void CheckMethodsHaveGcMaps(Class*) { |
| } |
| #endif |
| |
| void ClassLinker::VerifyClass(Class* klass) { |
| // TODO: assert that the monitor on the Class is held |
| ObjectLock lock(klass); |
| |
| if (klass->IsVerified()) { |
| return; |
| } |
| |
| // The class might already be erroneous if we attempted to verify a subclass |
| if (klass->IsErroneous()) { |
| ThrowEarlierClassFailure(klass); |
| return; |
| } |
| |
| CHECK_EQ(klass->GetStatus(), Class::kStatusResolved) << PrettyClass(klass); |
| klass->SetStatus(Class::kStatusVerifying); |
| |
| // Verify super class |
| Class* super = klass->GetSuperClass(); |
| std::string error_msg; |
| if (super != NULL) { |
| // Acquire lock to prevent races on verifying the super class |
| ObjectLock lock(super); |
| |
| if (!super->IsVerified() && !super->IsErroneous()) { |
| Runtime::Current()->GetClassLinker()->VerifyClass(super); |
| } |
| if (!super->IsVerified()) { |
| error_msg = "Rejecting class "; |
| error_msg += PrettyDescriptor(klass); |
| error_msg += " that attempts to sub-class erroneous class "; |
| error_msg += PrettyDescriptor(super); |
| LOG(ERROR) << error_msg << " in " << klass->GetDexCache()->GetLocation()->ToModifiedUtf8(); |
| Thread* self = Thread::Current(); |
| SirtRef<Throwable> cause(self->GetException()); |
| if (cause.get() != NULL) { |
| self->ClearException(); |
| } |
| self->ThrowNewException("Ljava/lang/VerifyError;", error_msg.c_str()); |
| if (cause.get() != NULL) { |
| self->GetException()->SetCause(cause.get()); |
| } |
| CHECK_EQ(klass->GetStatus(), Class::kStatusVerifying) << PrettyDescriptor(klass); |
| klass->SetStatus(Class::kStatusError); |
| return; |
| } |
| } |
| |
| // Try to use verification information from the oat file, otherwise do runtime verification. |
| const DexFile& dex_file = FindDexFile(klass->GetDexCache()); |
| Class::Status oat_file_class_status(Class::kStatusNotReady); |
| bool preverified = VerifyClassUsingOatFile(dex_file, klass, oat_file_class_status); |
| bool verified = preverified || verifier::DexVerifier::VerifyClass(klass, error_msg); |
| if (verified) { |
| if (!preverified && oat_file_class_status == Class::kStatusError) { |
| LOG(FATAL) << "Verification failed hard on class " << PrettyDescriptor(klass) |
| << " at compile time, but succeeded at runtime! The verifier must be broken."; |
| } |
| DCHECK(!Thread::Current()->IsExceptionPending()); |
| // Make sure all classes referenced by catch blocks are resolved |
| ResolveClassExceptionHandlerTypes(dex_file, klass); |
| klass->SetStatus(Class::kStatusVerified); |
| // Sanity check that a verified class has GC maps on all methods |
| CheckMethodsHaveGcMaps(klass); |
| } else { |
| LOG(ERROR) << "Verification failed on class " << PrettyDescriptor(klass) |
| << " in " << klass->GetDexCache()->GetLocation()->ToModifiedUtf8() |
| << " because: " << error_msg; |
| Thread* self = Thread::Current(); |
| CHECK(!self->IsExceptionPending()); |
| self->ThrowNewException("Ljava/lang/VerifyError;", error_msg.c_str()); |
| CHECK_EQ(klass->GetStatus(), Class::kStatusVerifying) << PrettyDescriptor(klass); |
| klass->SetStatus(Class::kStatusError); |
| } |
| } |
| |
| bool ClassLinker::VerifyClassUsingOatFile(const DexFile& dex_file, Class* klass, |
| Class::Status& oat_file_class_status) { |
| if (!Runtime::Current()->IsStarted()) { |
| return false; |
| } |
| if (Runtime::Current()->UseCompileTimeClassPath()) { |
| return false; |
| } |
| const OatFile* oat_file = FindOpenedOatFileForDexFile(dex_file); |
| CHECK(oat_file != NULL) << dex_file.GetLocation() << " " << PrettyClass(klass); |
| const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_file.GetLocation()); |
| CHECK(oat_dex_file != NULL) << dex_file.GetLocation() << " " << PrettyClass(klass); |
| const char* descriptor = ClassHelper(klass).GetDescriptor(); |
| uint32_t class_def_index; |
| bool found = dex_file.FindClassDefIndex(descriptor, class_def_index); |
| CHECK(found) << dex_file.GetLocation() << " " << PrettyClass(klass) << " " << descriptor; |
| UniquePtr<const OatFile::OatClass> oat_class(oat_dex_file->GetOatClass(class_def_index)); |
| CHECK(oat_class.get() != NULL) |
| << dex_file.GetLocation() << " " << PrettyClass(klass) << " " << descriptor; |
| oat_file_class_status = oat_class->GetStatus(); |
| if (oat_file_class_status == Class::kStatusVerified || oat_file_class_status == Class::kStatusInitialized) { |
| return true; |
| } |
| if (oat_file_class_status == Class::kStatusResolved) { |
| // Compile time verification failed with a soft error. Compile time verification can fail |
| // because we have incomplete type information. Consider the following: |
| // class ... { |
| // Foo x; |
| // .... () { |
| // if (...) { |
| // v1 gets assigned a type of resolved class Foo |
| // } else { |
| // v1 gets assigned a type of unresolved class Bar |
| // } |
| // iput x = v1 |
| // } } |
| // when we merge v1 following the if-the-else it results in Conflict |
| // (see verifier::RegType::Merge) as we can't know the type of Bar and we could possibly be |
| // allowing an unsafe assignment to the field x in the iput (javac may have compiled this as |
| // it knew Bar was a sub-class of Foo, but for us this may have been moved into a separate apk |
| // at compile time). |
| return false; |
| } |
| if (oat_file_class_status == Class::kStatusError) { |
| // Compile time verification failed with a hard error. This is caused by invalid instructions |
| // in the class. These errors are unrecoverable. |
| return false; |
| } |
| if (oat_file_class_status == Class::kStatusNotReady) { |
| // Status is uninitialized if we couldn't determine the status at compile time, for example, |
| // not loading the class. |
| // TODO: when the verifier doesn't rely on Class-es failing to resolve/load the type hierarchy |
| // isn't a problem and this case shouldn't occur |
| return false; |
| } |
| LOG(FATAL) << "Unexpected class status: " << oat_file_class_status |
| << " " << dex_file.GetLocation() << " " << PrettyClass(klass) << " " << descriptor; |
| |
| return false; |
| } |
| |
| void ClassLinker::ResolveClassExceptionHandlerTypes(const DexFile& dex_file, Class* klass) { |
| for (size_t i = 0; i < klass->NumDirectMethods(); i++) { |
| ResolveMethodExceptionHandlerTypes(dex_file, klass->GetDirectMethod(i)); |
| } |
| for (size_t i = 0; i < klass->NumVirtualMethods(); i++) { |
| ResolveMethodExceptionHandlerTypes(dex_file, klass->GetVirtualMethod(i)); |
| } |
| } |
| |
| void ClassLinker::ResolveMethodExceptionHandlerTypes(const DexFile& dex_file, Method* method) { |
| // similar to DexVerifier::ScanTryCatchBlocks and dex2oat's ResolveExceptionsForMethod. |
| const DexFile::CodeItem* code_item = dex_file.GetCodeItem(method->GetCodeItemOffset()); |
| if (code_item == NULL) { |
| return; // native or abstract method |
| } |
| if (code_item->tries_size_ == 0) { |
| return; // nothing to process |
| } |
| const byte* handlers_ptr = DexFile::GetCatchHandlerData(*code_item, 0); |
| uint32_t handlers_size = DecodeUnsignedLeb128(&handlers_ptr); |
| ClassLinker* linker = Runtime::Current()->GetClassLinker(); |
| for (uint32_t idx = 0; idx < handlers_size; idx++) { |
| CatchHandlerIterator iterator(handlers_ptr); |
| for (; iterator.HasNext(); iterator.Next()) { |
| // Ensure exception types are resolved so that they don't need resolution to be delivered, |
| // unresolved exception types will be ignored by exception delivery |
| if (iterator.GetHandlerTypeIndex() != DexFile::kDexNoIndex16) { |
| Class* exception_type = linker->ResolveType(iterator.GetHandlerTypeIndex(), method); |
| if (exception_type == NULL) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| Thread::Current()->ClearException(); |
| } |
| } |
| } |
| handlers_ptr = iterator.EndDataPointer(); |
| } |
| } |
| |
| static void CheckProxyConstructor(Method* constructor); |
| static void CheckProxyMethod(Method* method, SirtRef<Method>& prototype); |
| |
| Class* ClassLinker::CreateProxyClass(String* name, ObjectArray<Class>* interfaces, |
| ClassLoader* loader, ObjectArray<Method>* methods, |
| ObjectArray<ObjectArray<Class> >* throws) { |
| SirtRef<Class> klass(AllocClass(GetClassRoot(kJavaLangClass), sizeof(SynthesizedProxyClass))); |
| CHECK(klass.get() != NULL); |
| DCHECK(klass->GetClass() != NULL); |
| klass->SetObjectSize(sizeof(Proxy)); |
| klass->SetAccessFlags(kAccClassIsProxy | kAccPublic | kAccFinal); |
| klass->SetClassLoader(loader); |
| DCHECK_EQ(klass->GetPrimitiveType(), Primitive::kPrimNot); |
| klass->SetName(name); |
| Class* proxy_class = GetClassRoot(kJavaLangReflectProxy); |
| klass->SetDexCache(proxy_class->GetDexCache()); |
| |
| klass->SetStatus(Class::kStatusIdx); |
| |
| klass->SetDexTypeIndex(DexFile::kDexNoIndex16); |
| |
| // Instance fields are inherited, but we add a couple of static fields... |
| klass->SetSFields(AllocObjectArray<Field>(2)); |
| // 1. Create a static field 'interfaces' that holds the _declared_ interfaces implemented by |
| // our proxy, so Class.getInterfaces doesn't return the flattened set. |
| SirtRef<Field> interfaces_sfield(AllocField()); |
| klass->SetStaticField(0, interfaces_sfield.get()); |
| interfaces_sfield->SetDexFieldIndex(0); |
| interfaces_sfield->SetDeclaringClass(klass.get()); |
| interfaces_sfield->SetAccessFlags(kAccStatic | kAccPublic | kAccFinal); |
| // 2. Create a static field 'throws' that holds exceptions thrown by our methods. |
| SirtRef<Field> throws_sfield(AllocField()); |
| klass->SetStaticField(1, throws_sfield.get()); |
| throws_sfield->SetDexFieldIndex(1); |
| throws_sfield->SetDeclaringClass(klass.get()); |
| throws_sfield->SetAccessFlags(kAccStatic | kAccPublic | kAccFinal); |
| |
| // Proxies have 1 direct method, the constructor |
| klass->SetDirectMethods(AllocObjectArray<Method>(1)); |
| klass->SetDirectMethod(0, CreateProxyConstructor(klass, proxy_class)); |
| |
| // Create virtual method using specified prototypes |
| size_t num_virtual_methods = methods->GetLength(); |
| klass->SetVirtualMethods(AllocObjectArray<Method>(num_virtual_methods)); |
| for (size_t i = 0; i < num_virtual_methods; ++i) { |
| SirtRef<Method> prototype(methods->Get(i)); |
| klass->SetVirtualMethod(i, CreateProxyMethod(klass, prototype)); |
| } |
| |
| klass->SetSuperClass(proxy_class); // The super class is java.lang.reflect.Proxy |
| klass->SetStatus(Class::kStatusLoaded); // Class is now effectively in the loaded state |
| DCHECK(!Thread::Current()->IsExceptionPending()); |
| |
| // Link the fields and virtual methods, creating vtable and iftables |
| if (!LinkClass(klass, interfaces)) { |
| klass->SetStatus(Class::kStatusError); |
| return NULL; |
| } |
| interfaces_sfield->SetObject(NULL, interfaces); |
| throws_sfield->SetObject(NULL, throws); |
| klass->SetStatus(Class::kStatusInitialized); |
| |
| // sanity checks |
| if (kIsDebugBuild) { |
| CHECK(klass->GetIFields() == NULL); |
| CheckProxyConstructor(klass->GetDirectMethod(0)); |
| for (size_t i = 0; i < num_virtual_methods; ++i) { |
| SirtRef<Method> prototype(methods->Get(i)); |
| CheckProxyMethod(klass->GetVirtualMethod(i), prototype); |
| } |
| |
| std::string interfaces_field_name(StringPrintf("java.lang.Class[] %s.interfaces", |
| name->ToModifiedUtf8().c_str())); |
| CHECK_EQ(PrettyField(klass->GetStaticField(0)), interfaces_field_name); |
| |
| std::string throws_field_name(StringPrintf("java.lang.Class[][] %s.throws", |
| name->ToModifiedUtf8().c_str())); |
| CHECK_EQ(PrettyField(klass->GetStaticField(1)), throws_field_name); |
| |
| SynthesizedProxyClass* synth_proxy_class = down_cast<SynthesizedProxyClass*>(klass.get()); |
| CHECK_EQ(synth_proxy_class->GetInterfaces(), interfaces); |
| CHECK_EQ(synth_proxy_class->GetThrows(), throws); |
| } |
| return klass.get(); |
| } |
| |
| std::string ClassLinker::GetDescriptorForProxy(const Class* proxy_class) { |
| DCHECK(proxy_class->IsProxyClass()); |
| String* name = proxy_class->GetName(); |
| DCHECK(name != NULL); |
| return DotToDescriptor(name->ToModifiedUtf8().c_str()); |
| } |
| |
| Method* ClassLinker::FindMethodForProxy(const Class* proxy_class, const Method* proxy_method) { |
| DCHECK(proxy_class->IsProxyClass()); |
| DCHECK(proxy_method->IsProxyMethod()); |
| // Locate the dex cache of the original interface/Object |
| DexCache* dex_cache = NULL; |
| { |
| ObjectArray<Class>* resolved_types = proxy_method->GetDexCacheResolvedTypes(); |
| MutexLock mu(dex_lock_); |
| for (size_t i = 0; i != dex_caches_.size(); ++i) { |
| if (dex_caches_[i]->GetResolvedTypes() == resolved_types) { |
| dex_cache = dex_caches_[i]; |
| break; |
| } |
| } |
| } |
| CHECK(dex_cache != NULL); |
| uint32_t method_idx = proxy_method->GetDexMethodIndex(); |
| Method* resolved_method = dex_cache->GetResolvedMethod(method_idx); |
| CHECK(resolved_method != NULL); |
| return resolved_method; |
| } |
| |
| |
| Method* ClassLinker::CreateProxyConstructor(SirtRef<Class>& klass, Class* proxy_class) { |
| // Create constructor for Proxy that must initialize h |
| ObjectArray<Method>* proxy_direct_methods = proxy_class->GetDirectMethods(); |
| CHECK_EQ(proxy_direct_methods->GetLength(), 15); |
| Method* proxy_constructor = proxy_direct_methods->Get(2); |
| // Clone the existing constructor of Proxy (our constructor would just invoke it so steal its |
| // code_ too) |
| Method* constructor = down_cast<Method*>(proxy_constructor->Clone()); |
| // Make this constructor public and fix the class to be our Proxy version |
| constructor->SetAccessFlags((constructor->GetAccessFlags() & ~kAccProtected) | kAccPublic); |
| constructor->SetDeclaringClass(klass.get()); |
| return constructor; |
| } |
| |
| static void CheckProxyConstructor(Method* constructor) { |
| CHECK(constructor->IsConstructor()); |
| MethodHelper mh(constructor); |
| CHECK_STREQ(mh.GetName(), "<init>"); |
| CHECK_EQ(mh.GetSignature(), std::string("(Ljava/lang/reflect/InvocationHandler;)V")); |
| DCHECK(constructor->IsPublic()); |
| } |
| |
| Method* ClassLinker::CreateProxyMethod(SirtRef<Class>& klass, SirtRef<Method>& prototype) { |
| // Ensure prototype is in dex cache so that we can use the dex cache to look up the overridden |
| // prototype method |
| prototype->GetDeclaringClass()->GetDexCache()->SetResolvedMethod(prototype->GetDexMethodIndex(), |
| prototype.get()); |
| // We steal everything from the prototype (such as DexCache, invoke stub, etc.) then specialize |
| // as necessary |
| Method* method = down_cast<Method*>(prototype->Clone()); |
| |
| // Set class to be the concrete proxy class and clear the abstract flag, modify exceptions to |
| // the intersection of throw exceptions as defined in Proxy |
| method->SetDeclaringClass(klass.get()); |
| method->SetAccessFlags((method->GetAccessFlags() & ~kAccAbstract) | kAccFinal); |
| |
| // At runtime the method looks like a reference and argument saving method, clone the code |
| // related parameters from this method. |
| Method* refs_and_args = Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs); |
| method->SetCoreSpillMask(refs_and_args->GetCoreSpillMask()); |
| method->SetFpSpillMask(refs_and_args->GetFpSpillMask()); |
| method->SetFrameSizeInBytes(refs_and_args->GetFrameSizeInBytes()); |
| method->SetCode(reinterpret_cast<void*>(art_proxy_invoke_handler)); |
| |
| return method; |
| } |
| |
| static void CheckProxyMethod(Method* method, SirtRef<Method>& prototype) { |
| // Basic sanity |
| CHECK(!prototype->IsFinal()); |
| CHECK(method->IsFinal()); |
| CHECK(!method->IsAbstract()); |
| |
| // The proxy method doesn't have its own dex cache or dex file and so it steals those of its |
| // interface prototype. The exception to this are Constructors and the Class of the Proxy itself. |
| CHECK_EQ(prototype->GetDexCacheStrings(), method->GetDexCacheStrings()); |
| CHECK_EQ(prototype->GetDexCacheResolvedMethods(), method->GetDexCacheResolvedMethods()); |
| CHECK_EQ(prototype->GetDexCacheResolvedTypes(), method->GetDexCacheResolvedTypes()); |
| CHECK_EQ(prototype->GetDexCacheInitializedStaticStorage(), |
| method->GetDexCacheInitializedStaticStorage()); |
| CHECK_EQ(prototype->GetDexMethodIndex(), method->GetDexMethodIndex()); |
| |
| MethodHelper mh(method); |
| MethodHelper mh2(prototype.get()); |
| CHECK_STREQ(mh.GetName(), mh2.GetName()); |
| CHECK_STREQ(mh.GetShorty(), mh2.GetShorty()); |
| // More complex sanity - via dex cache |
| CHECK_EQ(mh.GetReturnType(), mh2.GetReturnType()); |
| } |
| |
| bool ClassLinker::InitializeClass(Class* klass, bool can_run_clinit, bool can_init_statics) { |
| CHECK(klass->IsResolved() || klass->IsErroneous()) |
| << PrettyClass(klass) << " is " << klass->GetStatus(); |
| |
| Thread* self = Thread::Current(); |
| |
| Method* clinit = NULL; |
| { |
| // see JLS 3rd edition, 12.4.2 "Detailed Initialization Procedure" for the locking protocol |
| ObjectLock lock(klass); |
| |
| if (klass->GetStatus() == Class::kStatusInitialized) { |
| return true; |
| } |
| |
| if (klass->IsErroneous()) { |
| ThrowEarlierClassFailure(klass); |
| return false; |
| } |
| |
| if (klass->GetStatus() == Class::kStatusResolved) { |
| VerifyClass(klass); |
| if (klass->GetStatus() != Class::kStatusVerified) { |
| CHECK(self->IsExceptionPending()); |
| return false; |
| } |
| } |
| |
| clinit = klass->FindDeclaredDirectMethod("<clinit>", "()V"); |
| if (clinit != NULL && !can_run_clinit) { |
| // if the class has a <clinit> but we can't run it during compilation, |
| // don't bother going to kStatusInitializing. We return false so that |
| // sub-classes don't believe this class is initialized. |
| // Opportunistically link non-static methods, TODO: don't initialize and dirty pages |
| // in second pass. |
| return false; |
| } |
| |
| // If the class is kStatusInitializing, either this thread is |
| // initializing higher up the stack or another thread has beat us |
| // to initializing and we need to wait. Either way, this |
| // invocation of InitializeClass will not be responsible for |
| // running <clinit> and will return. |
| if (klass->GetStatus() == Class::kStatusInitializing) { |
| // We caught somebody else in the act; was it us? |
| if (klass->GetClinitThreadId() == self->GetTid()) { |
| // Yes. That's fine. Return so we can continue initializing. |
| return true; |
| } |
| // No. That's fine. Wait for another thread to finish initializing. |
| return WaitForInitializeClass(klass, self, lock); |
| } |
| |
| if (!ValidateSuperClassDescriptors(klass)) { |
| klass->SetStatus(Class::kStatusError); |
| return false; |
| } |
| |
| DCHECK_EQ(klass->GetStatus(), Class::kStatusVerified) << PrettyClass(klass); |
| |
| klass->SetClinitThreadId(self->GetTid()); |
| klass->SetStatus(Class::kStatusInitializing); |
| } |
| |
| uint64_t t0 = NanoTime(); |
| |
| if (!InitializeSuperClass(klass, can_run_clinit, can_init_statics)) { |
| // Super class initialization failed, this can be because we can't run |
| // super-class class initializers in which case we'll be verified. |
| // Otherwise this class is erroneous. |
| if (!can_run_clinit) { |
| CHECK(klass->IsVerified()); |
| } else { |
| CHECK(klass->IsErroneous()); |
| } |
| return false; |
| } |
| |
| bool has_static_field_initializers = InitializeStaticFields(klass); |
| |
| if (clinit != NULL) { |
| clinit->Invoke(self, NULL, NULL, NULL); |
| } |
| |
| FixupStaticTrampolines(klass); |
| |
| uint64_t t1 = NanoTime(); |
| |
| bool success = true; |
| { |
| ObjectLock lock(klass); |
| |
| if (self->IsExceptionPending()) { |
| WrapExceptionInInitializer(); |
| klass->SetStatus(Class::kStatusError); |
| success = false; |
| } else { |
| RuntimeStats* global_stats = Runtime::Current()->GetStats(); |
| RuntimeStats* thread_stats = self->GetStats(); |
| ++global_stats->class_init_count; |
| ++thread_stats->class_init_count; |
| global_stats->class_init_time_ns += (t1 - t0); |
| thread_stats->class_init_time_ns += (t1 - t0); |
| // Set the class as initialized except if we can't initialize static fields and static field |
| // initialization is necessary. |
| if (!can_init_statics && has_static_field_initializers) { |
| klass->SetStatus(Class::kStatusVerified); // Don't leave class in initializing state. |
| success = false; |
| } else { |
| klass->SetStatus(Class::kStatusInitialized); |
| } |
| if (VLOG_IS_ON(class_linker)) { |
| ClassHelper kh(klass); |
| LOG(INFO) << "Initialized class " << kh.GetDescriptor() << " from " << kh.GetLocation(); |
| } |
| } |
| lock.NotifyAll(); |
| } |
| return success; |
| } |
| |
| bool ClassLinker::WaitForInitializeClass(Class* klass, Thread* self, ObjectLock& lock) { |
| while (true) { |
| CHECK(!self->IsExceptionPending()) << PrettyTypeOf(self->GetException()); |
| lock.Wait(); |
| |
| // When we wake up, repeat the test for init-in-progress. If |
| // there's an exception pending (only possible if |
| // "interruptShouldThrow" was set), bail out. |
| if (self->IsExceptionPending()) { |
| WrapExceptionInInitializer(); |
| klass->SetStatus(Class::kStatusError); |
| return false; |
| } |
| // Spurious wakeup? Go back to waiting. |
| if (klass->GetStatus() == Class::kStatusInitializing) { |
| continue; |
| } |
| if (klass->IsErroneous()) { |
| // The caller wants an exception, but it was thrown in a |
| // different thread. Synthesize one here. |
| ThrowNoClassDefFoundError("<clinit> failed for class %s; see exception in other thread", |
| PrettyDescriptor(klass).c_str()); |
| return false; |
| } |
| if (klass->IsInitialized()) { |
| return true; |
| } |
| LOG(FATAL) << "Unexpected class status. " << PrettyClass(klass) << " is " << klass->GetStatus(); |
| } |
| LOG(FATAL) << "Not Reached" << PrettyClass(klass); |
| } |
| |
| bool ClassLinker::ValidateSuperClassDescriptors(const Class* klass) { |
| if (klass->IsInterface()) { |
| return true; |
| } |
| // begin with the methods local to the superclass |
| if (klass->HasSuperClass() && |
| klass->GetClassLoader() != klass->GetSuperClass()->GetClassLoader()) { |
| const Class* super = klass->GetSuperClass(); |
| for (int i = super->GetVTable()->GetLength() - 1; i >= 0; --i) { |
| const Method* method = klass->GetVTable()->Get(i); |
| if (method != super->GetVTable()->Get(i) && |
| !IsSameMethodSignatureInDifferentClassContexts(method, super, klass)) { |
| ThrowLinkageError("Class %s method %s resolves differently in superclass %s", |
| PrettyDescriptor(klass).c_str(), PrettyMethod(method).c_str(), |
| PrettyDescriptor(super).c_str()); |
| return false; |
| } |
| } |
| } |
| for (int32_t i = 0; i < klass->GetIfTableCount(); ++i) { |
| InterfaceEntry* interface_entry = klass->GetIfTable()->Get(i); |
| Class* interface = interface_entry->GetInterface(); |
| if (klass->GetClassLoader() != interface->GetClassLoader()) { |
| for (size_t j = 0; j < interface->NumVirtualMethods(); ++j) { |
| const Method* method = interface_entry->GetMethodArray()->Get(j); |
| if (!IsSameMethodSignatureInDifferentClassContexts(method, interface, |
| method->GetDeclaringClass())) { |
| ThrowLinkageError("Class %s method %s resolves differently in interface %s", |
| PrettyDescriptor(method->GetDeclaringClass()).c_str(), |
| PrettyMethod(method).c_str(), |
| PrettyDescriptor(interface).c_str()); |
| return false; |
| } |
| } |
| } |
| } |
| return true; |
| } |
| |
| // Returns true if classes referenced by the signature of the method are the |
| // same classes in klass1 as they are in klass2. |
| bool ClassLinker::IsSameMethodSignatureInDifferentClassContexts(const Method* method, |
| const Class* klass1, |
| const Class* klass2) { |
| if (klass1 == klass2) { |
| return true; |
| } |
| const DexFile& dex_file = FindDexFile(method->GetDeclaringClass()->GetDexCache()); |
| const DexFile::ProtoId& proto_id = |
| dex_file.GetMethodPrototype(dex_file.GetMethodId(method->GetDexMethodIndex())); |
| for (DexFileParameterIterator it(dex_file, proto_id); it.HasNext(); it.Next()) { |
| const char* descriptor = it.GetDescriptor(); |
| if (descriptor == NULL) { |
| break; |
| } |
| if (descriptor[0] == 'L' || descriptor[0] == '[') { |
| // Found a non-primitive type. |
| if (!IsSameDescriptorInDifferentClassContexts(descriptor, klass1, klass2)) { |
| return false; |
| } |
| } |
| } |
| // Check the return type |
| const char* descriptor = dex_file.GetReturnTypeDescriptor(proto_id); |
| if (descriptor[0] == 'L' || descriptor[0] == '[') { |
| if (!IsSameDescriptorInDifferentClassContexts(descriptor, klass1, klass2)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| // Returns true if the descriptor resolves to the same class in the context of klass1 and klass2. |
| bool ClassLinker::IsSameDescriptorInDifferentClassContexts(const char* descriptor, |
| const Class* klass1, |
| const Class* klass2) { |
| CHECK(descriptor != NULL); |
| CHECK(klass1 != NULL); |
| CHECK(klass2 != NULL); |
| if (klass1 == klass2) { |
| return true; |
| } |
| Class* found1 = FindClass(descriptor, klass1->GetClassLoader()); |
| if (found1 == NULL) { |
| Thread::Current()->ClearException(); |
| } |
| Class* found2 = FindClass(descriptor, klass2->GetClassLoader()); |
| if (found2 == NULL) { |
| Thread::Current()->ClearException(); |
| } |
| return found1 == found2; |
| } |
| |
| bool ClassLinker::InitializeSuperClass(Class* klass, bool can_run_clinit, bool can_init_fields) { |
| CHECK(klass != NULL); |
| if (!klass->IsInterface() && klass->HasSuperClass()) { |
| Class* super_class = klass->GetSuperClass(); |
| if (super_class->GetStatus() != Class::kStatusInitialized) { |
| CHECK(!super_class->IsInterface()); |
| Thread* self = Thread::Current(); |
| klass->MonitorEnter(self); |
| bool super_initialized = InitializeClass(super_class, can_run_clinit, can_init_fields); |
| klass->MonitorExit(self); |
| // TODO: check for a pending exception |
| if (!super_initialized) { |
| if (!can_run_clinit) { |
| // Don't set status to error when we can't run <clinit>. |
| CHECK_EQ(klass->GetStatus(), Class::kStatusInitializing) << PrettyClass(klass); |
| klass->SetStatus(Class::kStatusVerified); |
| return false; |
| } |
| klass->SetStatus(Class::kStatusError); |
| klass->NotifyAll(); |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| bool ClassLinker::EnsureInitialized(Class* c, bool can_run_clinit, bool can_init_fields) { |
| CHECK(c != NULL); |
| if (c->IsInitialized()) { |
| return true; |
| } |
| |
| Thread* self = Thread::Current(); |
| ScopedThreadStateChange tsc(self, Thread::kRunnable); |
| bool success = InitializeClass(c, can_run_clinit, can_init_fields); |
| if (!success) { |
| CHECK(self->IsExceptionPending() || !can_run_clinit) << PrettyClass(c); |
| } |
| return success; |
| } |
| |
| void ClassLinker::ConstructFieldMap(const DexFile& dex_file, const DexFile::ClassDef& dex_class_def, |
| Class* c, std::map<uint32_t, Field*>& field_map) { |
| const ClassLoader* cl = c->GetClassLoader(); |
| const byte* class_data = dex_file.GetClassData(dex_class_def); |
| ClassDataItemIterator it(dex_file, class_data); |
| for (size_t i = 0; it.HasNextStaticField(); i++, it.Next()) { |
| field_map[i] = ResolveField(dex_file, it.GetMemberIndex(), c->GetDexCache(), cl, true); |
| } |
| } |
| |
| bool ClassLinker::InitializeStaticFields(Class* klass) { |
| size_t num_static_fields = klass->NumStaticFields(); |
| if (num_static_fields == 0) { |
| return false; |
| } |
| DexCache* dex_cache = klass->GetDexCache(); |
| // TODO: this seems like the wrong check. do we really want !IsPrimitive && !IsArray? |
| if (dex_cache == NULL) { |
| return false; |
| } |
| ClassHelper kh(klass); |
| const DexFile::ClassDef* dex_class_def = kh.GetClassDef(); |
| CHECK(dex_class_def != NULL); |
| const DexFile& dex_file = kh.GetDexFile(); |
| EncodedStaticFieldValueIterator it(dex_file, dex_cache, this, *dex_class_def); |
| |
| if (it.HasNext()) { |
| // We reordered the fields, so we need to be able to map the field indexes to the right fields. |
| std::map<uint32_t, Field*> field_map; |
| ConstructFieldMap(dex_file, *dex_class_def, klass, field_map); |
| for (size_t i = 0; it.HasNext(); i++, it.Next()) { |
| it.ReadValueToField(field_map[i]); |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| bool ClassLinker::LinkClass(SirtRef<Class>& klass, ObjectArray<Class>* interfaces) { |
| CHECK_EQ(Class::kStatusLoaded, klass->GetStatus()); |
| if (!LinkSuperClass(klass)) { |
| return false; |
| } |
| if (!LinkMethods(klass, interfaces)) { |
| return false; |
| } |
| if (!LinkInstanceFields(klass)) { |
| return false; |
| } |
| if (!LinkStaticFields(klass)) { |
| return false; |
| } |
| CreateReferenceInstanceOffsets(klass); |
| CreateReferenceStaticOffsets(klass); |
| CHECK_EQ(Class::kStatusLoaded, klass->GetStatus()); |
| klass->SetStatus(Class::kStatusResolved); |
| return true; |
| } |
| |
| bool ClassLinker::LoadSuperAndInterfaces(SirtRef<Class>& klass, const DexFile& dex_file) { |
| CHECK_EQ(Class::kStatusIdx, klass->GetStatus()); |
| StringPiece descriptor(dex_file.StringByTypeIdx(klass->GetDexTypeIndex())); |
| const DexFile::ClassDef* class_def = dex_file.FindClassDef(descriptor); |
| CHECK(class_def != NULL); |
| uint16_t super_class_idx = class_def->superclass_idx_; |
| if (super_class_idx != DexFile::kDexNoIndex16) { |
| Class* super_class = ResolveType(dex_file, super_class_idx, klass.get()); |
| if (super_class == NULL) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return false; |
| } |
| // Verify |
| if (!klass->CanAccess(super_class)) { |
| Thread::Current()->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;", |
| "Class %s extended by class %s is inaccessible", |
| PrettyDescriptor(super_class).c_str(), |
| PrettyDescriptor(klass.get()).c_str()); |
| return false; |
| } |
| klass->SetSuperClass(super_class); |
| } |
| const DexFile::TypeList* interfaces = dex_file.GetInterfacesList(*class_def); |
| if (interfaces != NULL) { |
| for (size_t i = 0; i < interfaces->Size(); i++) { |
| uint16_t idx = interfaces->GetTypeItem(i).type_idx_; |
| Class* interface = ResolveType(dex_file, idx, klass.get()); |
| if (interface == NULL) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return false; |
| } |
| // Verify |
| if (!klass->CanAccess(interface)) { |
| // TODO: the RI seemed to ignore this in my testing. |
| Thread::Current()->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;", |
| "Interface %s implemented by class %s is inaccessible", |
| PrettyDescriptor(interface).c_str(), |
| PrettyDescriptor(klass.get()).c_str()); |
| return false; |
| } |
| } |
| } |
| // Mark the class as loaded. |
| klass->SetStatus(Class::kStatusLoaded); |
| return true; |
| } |
| |
| bool ClassLinker::LinkSuperClass(SirtRef<Class>& klass) { |
| CHECK(!klass->IsPrimitive()); |
| Class* super = klass->GetSuperClass(); |
| if (klass.get() == GetClassRoot(kJavaLangObject)) { |
| if (super != NULL) { |
| Thread::Current()->ThrowNewExceptionF("Ljava/lang/ClassFormatError;", |
| "java.lang.Object must not have a superclass"); |
| return false; |
| } |
| return true; |
| } |
| if (super == NULL) { |
| ThrowLinkageError("No superclass defined for class %s", PrettyDescriptor(klass.get()).c_str()); |
| return false; |
| } |
| // Verify |
| if (super->IsFinal() || super->IsInterface()) { |
| Thread* self = Thread::Current(); |
| self->ThrowNewExceptionF("Ljava/lang/IncompatibleClassChangeError;", |
| "Superclass %s of %s is %s", |
| PrettyDescriptor(super).c_str(), |
| PrettyDescriptor(klass.get()).c_str(), |
| super->IsFinal() ? "declared final" : "an interface"); |
| return false; |
| } |
| if (!klass->CanAccess(super)) { |
| Thread::Current()->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;", |
| "Superclass %s is inaccessible by %s", |
| PrettyDescriptor(super).c_str(), |
| PrettyDescriptor(klass.get()).c_str()); |
| return false; |
| } |
| |
| // Inherit kAccClassIsFinalizable from the superclass in case this class doesn't override finalize. |
| if (super->IsFinalizable()) { |
| klass->SetFinalizable(); |
| } |
| |
| // Inherit reference flags (if any) from the superclass. |
| int reference_flags = (super->GetAccessFlags() & kAccReferenceFlagsMask); |
| if (reference_flags != 0) { |
| klass->SetAccessFlags(klass->GetAccessFlags() | reference_flags); |
| } |
| // Disallow custom direct subclasses of java.lang.ref.Reference. |
| if (init_done_ && super == GetClassRoot(kJavaLangRefReference)) { |
| ThrowLinkageError("Class %s attempts to subclass java.lang.ref.Reference, which is not allowed", |
| PrettyDescriptor(klass.get()).c_str()); |
| return false; |
| } |
| |
| #ifndef NDEBUG |
| // Ensure super classes are fully resolved prior to resolving fields.. |
| while (super != NULL) { |
| CHECK(super->IsResolved()); |
| super = super->GetSuperClass(); |
| } |
| #endif |
| return true; |
| } |
| |
| // Populate the class vtable and itable. Compute return type indices. |
| bool ClassLinker::LinkMethods(SirtRef<Class>& klass, ObjectArray<Class>* interfaces) { |
| if (klass->IsInterface()) { |
| // No vtable. |
| size_t count = klass->NumVirtualMethods(); |
| if (!IsUint(16, count)) { |
| ThrowClassFormatError("Too many methods on interface: %zd", count); |
| return false; |
| } |
| for (size_t i = 0; i < count; ++i) { |
| klass->GetVirtualMethodDuringLinking(i)->SetMethodIndex(i); |
| } |
| // Link interface method tables |
| return LinkInterfaceMethods(klass, interfaces); |
| } else { |
| // Link virtual and interface method tables |
| return LinkVirtualMethods(klass) && LinkInterfaceMethods(klass, interfaces); |
| } |
| return true; |
| } |
| |
| bool ClassLinker::LinkVirtualMethods(SirtRef<Class>& klass) { |
| if (klass->HasSuperClass()) { |
| uint32_t max_count = klass->NumVirtualMethods() + klass->GetSuperClass()->GetVTable()->GetLength(); |
| size_t actual_count = klass->GetSuperClass()->GetVTable()->GetLength(); |
| CHECK_LE(actual_count, max_count); |
| // TODO: do not assign to the vtable field until it is fully constructed. |
| SirtRef<ObjectArray<Method> > vtable(klass->GetSuperClass()->GetVTable()->CopyOf(max_count)); |
| // See if any of our virtual methods override the superclass. |
| MethodHelper local_mh(NULL, this); |
| MethodHelper super_mh(NULL, this); |
| for (size_t i = 0; i < klass->NumVirtualMethods(); ++i) { |
| Method* local_method = klass->GetVirtualMethodDuringLinking(i); |
| local_mh.ChangeMethod(local_method); |
| size_t j = 0; |
| for (; j < actual_count; ++j) { |
| Method* super_method = vtable->Get(j); |
| super_mh.ChangeMethod(super_method); |
| if (local_mh.HasSameNameAndSignature(&super_mh)) { |
| // Verify |
| if (super_method->IsFinal()) { |
| MethodHelper mh(local_method); |
| ThrowLinkageError("Method %s.%s overrides final method in class %s", |
| PrettyDescriptor(klass.get()).c_str(), |
| mh.GetName(), mh.GetDeclaringClassDescriptor()); |
| return false; |
| } |
| vtable->Set(j, local_method); |
| local_method->SetMethodIndex(j); |
| break; |
| } |
| } |
| if (j == actual_count) { |
| // Not overriding, append. |
| vtable->Set(actual_count, local_method); |
| local_method->SetMethodIndex(actual_count); |
| actual_count += 1; |
| } |
| } |
| if (!IsUint(16, actual_count)) { |
| ThrowClassFormatError("Too many methods defined on class: %zd", actual_count); |
| return false; |
| } |
| // Shrink vtable if possible |
| CHECK_LE(actual_count, max_count); |
| if (actual_count < max_count) { |
| vtable.reset(vtable->CopyOf(actual_count)); |
| } |
| klass->SetVTable(vtable.get()); |
| } else { |
| CHECK(klass.get() == GetClassRoot(kJavaLangObject)); |
| uint32_t num_virtual_methods = klass->NumVirtualMethods(); |
| if (!IsUint(16, num_virtual_methods)) { |
| ThrowClassFormatError("Too many methods: %d", num_virtual_methods); |
| return false; |
| } |
| SirtRef<ObjectArray<Method> > vtable(AllocObjectArray<Method>(num_virtual_methods)); |
| for (size_t i = 0; i < num_virtual_methods; ++i) { |
| Method* virtual_method = klass->GetVirtualMethodDuringLinking(i); |
| vtable->Set(i, virtual_method); |
| virtual_method->SetMethodIndex(i & 0xFFFF); |
| } |
| klass->SetVTable(vtable.get()); |
| } |
| return true; |
| } |
| |
| bool ClassLinker::LinkInterfaceMethods(SirtRef<Class>& klass, ObjectArray<Class>* interfaces) { |
| size_t super_ifcount; |
| if (klass->HasSuperClass()) { |
| super_ifcount = klass->GetSuperClass()->GetIfTableCount(); |
| } else { |
| super_ifcount = 0; |
| } |
| size_t ifcount = super_ifcount; |
| ClassHelper kh(klass.get(), this); |
| uint32_t num_interfaces = interfaces == NULL ? kh.NumInterfaces() : interfaces->GetLength(); |
| ifcount += num_interfaces; |
| for (size_t i = 0; i < num_interfaces; i++) { |
| Class* interface = interfaces == NULL ? kh.GetInterface(i) : interfaces->Get(i); |
| ifcount += interface->GetIfTableCount(); |
| } |
| if (ifcount == 0) { |
| // TODO: enable these asserts with klass status validation |
| // DCHECK_EQ(klass->GetIfTableCount(), 0); |
| // DCHECK(klass->GetIfTable() == NULL); |
| return true; |
| } |
| SirtRef<ObjectArray<InterfaceEntry> > iftable(AllocObjectArray<InterfaceEntry>(ifcount)); |
| if (super_ifcount != 0) { |
| ObjectArray<InterfaceEntry>* super_iftable = klass->GetSuperClass()->GetIfTable(); |
| for (size_t i = 0; i < super_ifcount; i++) { |
| Class* super_interface = super_iftable->Get(i)->GetInterface(); |
| iftable->Set(i, AllocInterfaceEntry(super_interface)); |
| } |
| } |
| // Flatten the interface inheritance hierarchy. |
| size_t idx = super_ifcount; |
| for (size_t i = 0; i < num_interfaces; i++) { |
| Class* interface = interfaces == NULL ? kh.GetInterface(i) : interfaces->Get(i); |
| DCHECK(interface != NULL); |
| if (!interface->IsInterface()) { |
| ClassHelper ih(interface); |
| Thread* self = Thread::Current(); |
| self->ThrowNewExceptionF("Ljava/lang/IncompatibleClassChangeError;", |
| "Class %s implements non-interface class %s", |
| PrettyDescriptor(klass.get()).c_str(), |
| PrettyDescriptor(ih.GetDescriptor()).c_str()); |
| return false; |
| } |
| // Check if interface is already in iftable |
| bool duplicate = false; |
| for (size_t j = 0; j < idx; j++) { |
| Class* existing_interface = iftable->Get(j)->GetInterface(); |
| if (existing_interface == interface) { |
| duplicate = true; |
| break; |
| } |
| } |
| if (!duplicate) { |
| // Add this non-duplicate interface. |
| iftable->Set(idx++, AllocInterfaceEntry(interface)); |
| // Add this interface's non-duplicate super-interfaces. |
| for (int32_t j = 0; j < interface->GetIfTableCount(); j++) { |
| Class* super_interface = interface->GetIfTable()->Get(j)->GetInterface(); |
| bool super_duplicate = false; |
| for (size_t k = 0; k < idx; k++) { |
| Class* existing_interface = iftable->Get(k)->GetInterface(); |
| if (existing_interface == super_interface) { |
| super_duplicate = true; |
| break; |
| } |
| } |
| if (!super_duplicate) { |
| iftable->Set(idx++, AllocInterfaceEntry(super_interface)); |
| } |
| } |
| } |
| } |
| // Shrink iftable in case duplicates were found |
| if (idx < ifcount) { |
| iftable.reset(iftable->CopyOf(idx)); |
| ifcount = idx; |
| } else { |
| CHECK_EQ(idx, ifcount); |
| } |
| klass->SetIfTable(iftable.get()); |
| |
| // If we're an interface, we don't need the vtable pointers, so we're done. |
| if (klass->IsInterface() /*|| super_ifcount == ifcount*/) { |
| return true; |
| } |
| std::vector<Method*> miranda_list; |
| MethodHelper vtable_mh(NULL, this); |
| MethodHelper interface_mh(NULL, this); |
| for (size_t i = 0; i < ifcount; ++i) { |
| InterfaceEntry* interface_entry = iftable->Get(i); |
| Class* interface = interface_entry->GetInterface(); |
| ObjectArray<Method>* method_array = AllocObjectArray<Method>(interface->NumVirtualMethods()); |
| interface_entry->SetMethodArray(method_array); |
| ObjectArray<Method>* vtable = klass->GetVTableDuringLinking(); |
| for (size_t j = 0; j < interface->NumVirtualMethods(); ++j) { |
| Method* interface_method = interface->GetVirtualMethod(j); |
| interface_mh.ChangeMethod(interface_method); |
| int32_t k; |
| // For each method listed in the interface's method list, find the |
| // matching method in our class's method list. We want to favor the |
| // subclass over the superclass, which just requires walking |
| // back from the end of the vtable. (This only matters if the |
| // superclass defines a private method and this class redefines |
| // it -- otherwise it would use the same vtable slot. In .dex files |
| // those don't end up in the virtual method table, so it shouldn't |
| // matter which direction we go. We walk it backward anyway.) |
| for (k = vtable->GetLength() - 1; k >= 0; --k) { |
| Method* vtable_method = vtable->Get(k); |
| vtable_mh.ChangeMethod(vtable_method); |
| if (interface_mh.HasSameNameAndSignature(&vtable_mh)) { |
| if (!vtable_method->IsPublic()) { |
| Thread::Current()->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;", |
| "Implementation not public: %s", PrettyMethod(vtable_method).c_str()); |
| return false; |
| } |
| method_array->Set(j, vtable_method); |
| break; |
| } |
| } |
| if (k < 0) { |
| SirtRef<Method> miranda_method(NULL); |
| for (size_t mir = 0; mir < miranda_list.size(); mir++) { |
| Method* mir_method = miranda_list[mir]; |
| vtable_mh.ChangeMethod(mir_method); |
| if (interface_mh.HasSameNameAndSignature(&vtable_mh)) { |
| miranda_method.reset(miranda_list[mir]); |
| break; |
| } |
| } |
| if (miranda_method.get() == NULL) { |
| // point the interface table at a phantom slot |
| miranda_method.reset(AllocMethod()); |
| memcpy(miranda_method.get(), interface_method, sizeof(Method)); |
| miranda_list.push_back(miranda_method.get()); |
| } |
| method_array->Set(j, miranda_method.get()); |
| } |
| } |
| } |
| if (!miranda_list.empty()) { |
| int old_method_count = klass->NumVirtualMethods(); |
| int new_method_count = old_method_count + miranda_list.size(); |
| klass->SetVirtualMethods((old_method_count == 0) |
| ? AllocObjectArray<Method>(new_method_count) |
| : klass->GetVirtualMethods()->CopyOf(new_method_count)); |
| |
| SirtRef<ObjectArray<Method> > vtable(klass->GetVTableDuringLinking()); |
| CHECK(vtable.get() != NULL); |
| int old_vtable_count = vtable->GetLength(); |
| int new_vtable_count = old_vtable_count + miranda_list.size(); |
| vtable.reset(vtable->CopyOf(new_vtable_count)); |
| for (size_t i = 0; i < miranda_list.size(); ++i) { |
| Method* method = miranda_list[i]; |
| // Leave the declaring class alone as type indices are relative to it |
| method->SetAccessFlags(method->GetAccessFlags() | kAccMiranda); |
| method->SetMethodIndex(0xFFFF & (old_vtable_count + i)); |
| klass->SetVirtualMethod(old_method_count + i, method); |
| vtable->Set(old_vtable_count + i, method); |
| } |
| // TODO: do not assign to the vtable field until it is fully constructed. |
| klass->SetVTable(vtable.get()); |
| } |
| |
| ObjectArray<Method>* vtable = klass->GetVTableDuringLinking(); |
| for (int i = 0; i < vtable->GetLength(); ++i) { |
| CHECK(vtable->Get(i) != NULL); |
| } |
| |
| // klass->DumpClass(std::cerr, Class::kDumpClassFullDetail); |
| |
| return true; |
| } |
| |
| bool ClassLinker::LinkInstanceFields(SirtRef<Class>& klass) { |
| CHECK(klass.get() != NULL); |
| return LinkFields(klass, false); |
| } |
| |
| bool ClassLinker::LinkStaticFields(SirtRef<Class>& klass) { |
| CHECK(klass.get() != NULL); |
| size_t allocated_class_size = klass->GetClassSize(); |
| bool success = LinkFields(klass, true); |
| CHECK_EQ(allocated_class_size, klass->GetClassSize()); |
| return success; |
| } |
| |
| struct LinkFieldsComparator { |
| explicit LinkFieldsComparator(FieldHelper* fh) : fh_(fh) {} |
| bool operator()(const Field* field1, const Field* field2) { |
| // First come reference fields, then 64-bit, and finally 32-bit |
| fh_->ChangeField(field1); |
| Primitive::Type type1 = fh_->GetTypeAsPrimitiveType(); |
| fh_->ChangeField(field2); |
| Primitive::Type type2 = fh_->GetTypeAsPrimitiveType(); |
| bool isPrimitive1 = type1 != Primitive::kPrimNot; |
| bool isPrimitive2 = type2 != Primitive::kPrimNot; |
| bool is64bit1 = isPrimitive1 && (type1 == Primitive::kPrimLong || type1 == Primitive::kPrimDouble); |
| bool is64bit2 = isPrimitive2 && (type2 == Primitive::kPrimLong || type2 == Primitive::kPrimDouble); |
| int order1 = (!isPrimitive1 ? 0 : (is64bit1 ? 1 : 2)); |
| int order2 = (!isPrimitive2 ? 0 : (is64bit2 ? 1 : 2)); |
| if (order1 != order2) { |
| return order1 < order2; |
| } |
| |
| // same basic group? then sort by string. |
| fh_->ChangeField(field1); |
| StringPiece name1(fh_->GetName()); |
| fh_->ChangeField(field2); |
| StringPiece name2(fh_->GetName()); |
| return name1 < name2; |
| } |
| |
| FieldHelper* fh_; |
| }; |
| |
| bool ClassLinker::LinkFields(SirtRef<Class>& klass, bool is_static) { |
| size_t num_fields = |
| is_static ? klass->NumStaticFields() : klass->NumInstanceFields(); |
| |
| ObjectArray<Field>* fields = |
| is_static ? klass->GetSFields() : klass->GetIFields(); |
| |
| // Initialize size and field_offset |
| size_t size; |
| MemberOffset field_offset(0); |
| if (is_static) { |
| size = klass->GetClassSize(); |
| field_offset = Class::FieldsOffset(); |
| } else { |
| Class* super_class = klass->GetSuperClass(); |
| if (super_class != NULL) { |
| CHECK(super_class->IsResolved()); |
| field_offset = MemberOffset(super_class->GetObjectSize()); |
| } |
| size = field_offset.Uint32Value(); |
| } |
| |
| CHECK_EQ(num_fields == 0, fields == NULL); |
| |
| // we want a relatively stable order so that adding new fields |
| // minimizes disruption of C++ version such as Class and Method. |
| std::deque<Field*> grouped_and_sorted_fields; |
| for (size_t i = 0; i < num_fields; i++) { |
| grouped_and_sorted_fields.push_back(fields->Get(i)); |
| } |
| FieldHelper fh(NULL, this); |
| std::sort(grouped_and_sorted_fields.begin(), |
| grouped_and_sorted_fields.end(), |
| LinkFieldsComparator(&fh)); |
| |
| // References should be at the front. |
| size_t current_field = 0; |
| size_t num_reference_fields = 0; |
| for (; current_field < num_fields; current_field++) { |
| Field* field = grouped_and_sorted_fields.front(); |
| fh.ChangeField(field); |
| Primitive::Type type = fh.GetTypeAsPrimitiveType(); |
| bool isPrimitive = type != Primitive::kPrimNot; |
| if (isPrimitive) { |
| break; // past last reference, move on to the next phase |
| } |
| grouped_and_sorted_fields.pop_front(); |
| num_reference_fields++; |
| fields->Set(current_field, field); |
| field->SetOffset(field_offset); |
| field_offset = MemberOffset(field_offset.Uint32Value() + sizeof(uint32_t)); |
| } |
| |
| // Now we want to pack all of the double-wide fields together. If |
| // we're not aligned, though, we want to shuffle one 32-bit field |
| // into place. If we can't find one, we'll have to pad it. |
| if (current_field != num_fields && !IsAligned<8>(field_offset.Uint32Value())) { |
| for (size_t i = 0; i < grouped_and_sorted_fields.size(); i++) { |
| Field* field = grouped_and_sorted_fields[i]; |
| fh.ChangeField(field); |
| Primitive::Type type = fh.GetTypeAsPrimitiveType(); |
| CHECK(type != Primitive::kPrimNot); // should only be working on primitive types |
| if (type == Primitive::kPrimLong || type == Primitive::kPrimDouble) { |
| continue; |
| } |
| fields->Set(current_field++, field); |
| field->SetOffset(field_offset); |
| // drop the consumed field |
| grouped_and_sorted_fields.erase(grouped_and_sorted_fields.begin() + i); |
| break; |
| } |
| // whether we found a 32-bit field for padding or not, we advance |
| field_offset = MemberOffset(field_offset.Uint32Value() + sizeof(uint32_t)); |
| } |
| |
| // Alignment is good, shuffle any double-wide fields forward, and |
| // finish assigning field offsets to all fields. |
| DCHECK(current_field == num_fields || IsAligned<8>(field_offset.Uint32Value())); |
| while (!grouped_and_sorted_fields.empty()) { |
| Field* field = grouped_and_sorted_fields.front(); |
| grouped_and_sorted_fields.pop_front(); |
| fh.ChangeField(field); |
| Primitive::Type type = fh.GetTypeAsPrimitiveType(); |
| CHECK(type != Primitive::kPrimNot); // should only be working on primitive types |
| fields->Set(current_field, field); |
| field->SetOffset(field_offset); |
| field_offset = MemberOffset(field_offset.Uint32Value() + |
| ((type == Primitive::kPrimLong || type == Primitive::kPrimDouble) |
| ? sizeof(uint64_t) |
| : sizeof(uint32_t))); |
| current_field++; |
| } |
| |
| // We lie to the GC about the java.lang.ref.Reference.referent field, so it doesn't scan it. |
| std::string descriptor(ClassHelper(klass.get(), this).GetDescriptor()); |
| if (!is_static && descriptor == "Ljava/lang/ref/Reference;") { |
| // We know there are no non-reference fields in the Reference classes, and we know |
| // that 'referent' is alphabetically last, so this is easy... |
| CHECK_EQ(num_reference_fields, num_fields); |
| fh.ChangeField(fields->Get(num_fields - 1)); |
| CHECK_STREQ(fh.GetName(), "referent"); |
| --num_reference_fields; |
| } |
| |
| #ifndef NDEBUG |
| // Make sure that all reference fields appear before |
| // non-reference fields, and all double-wide fields are aligned. |
| bool seen_non_ref = false; |
| for (size_t i = 0; i < num_fields; i++) { |
| Field* field = fields->Get(i); |
| if (false) { // enable to debug field layout |
| LOG(INFO) << "LinkFields: " << (is_static ? "static" : "instance") |
| << " class=" << PrettyClass(klass.get()) |
| << " field=" << PrettyField(field) |
| << " offset=" << field->GetField32(MemberOffset(Field::OffsetOffset()), false); |
| } |
| fh.ChangeField(field); |
| Primitive::Type type = fh.GetTypeAsPrimitiveType(); |
| bool is_primitive = type != Primitive::kPrimNot; |
| if (descriptor == "Ljava/lang/ref/Reference;" && StringPiece(fh.GetName()) == "referent") { |
| is_primitive = true; // We lied above, so we have to expect a lie here. |
| } |
| if (is_primitive) { |
| if (!seen_non_ref) { |
| seen_non_ref = true; |
| DCHECK_EQ(num_reference_fields, i); |
| } |
| } else { |
| DCHECK(!seen_non_ref); |
| } |
| } |
| if (!seen_non_ref) { |
| DCHECK_EQ(num_fields, num_reference_fields); |
| } |
| #endif |
| size = field_offset.Uint32Value(); |
| // Update klass |
| if (is_static) { |
| klass->SetNumReferenceStaticFields(num_reference_fields); |
| klass->SetClassSize(size); |
| } else { |
| klass->SetNumReferenceInstanceFields(num_reference_fields); |
| if (!klass->IsVariableSize()) { |
| klass->SetObjectSize(size); |
| } |
| } |
| return true; |
| } |
| |
| // Set the bitmap of reference offsets, refOffsets, from the ifields |
| // list. |
| void ClassLinker::CreateReferenceInstanceOffsets(SirtRef<Class>& klass) { |
| uint32_t reference_offsets = 0; |
| Class* super_class = klass->GetSuperClass(); |
| if (super_class != NULL) { |
| reference_offsets = super_class->GetReferenceInstanceOffsets(); |
| // If our superclass overflowed, we don't stand a chance. |
| if (reference_offsets == CLASS_WALK_SUPER) { |
| klass->SetReferenceInstanceOffsets(reference_offsets); |
| return; |
| } |
| } |
| CreateReferenceOffsets(klass, false, reference_offsets); |
| } |
| |
| void ClassLinker::CreateReferenceStaticOffsets(SirtRef<Class>& klass) { |
| CreateReferenceOffsets(klass, true, 0); |
| } |
| |
| void ClassLinker::CreateReferenceOffsets(SirtRef<Class>& klass, bool is_static, |
| uint32_t reference_offsets) { |
| size_t num_reference_fields = |
| is_static ? klass->NumReferenceStaticFieldsDuringLinking() |
| : klass->NumReferenceInstanceFieldsDuringLinking(); |
| const ObjectArray<Field>* fields = |
| is_static ? klass->GetSFields() : klass->GetIFields(); |
| // All of the fields that contain object references are guaranteed |
| // to be at the beginning of the fields list. |
| for (size_t i = 0; i < num_reference_fields; ++i) { |
| // Note that byte_offset is the offset from the beginning of |
| // object, not the offset into instance data |
| const Field* field = fields->Get(i); |
| MemberOffset byte_offset = field->GetOffsetDuringLinking(); |
| CHECK_EQ(byte_offset.Uint32Value() & (CLASS_OFFSET_ALIGNMENT - 1), 0U); |
| if (CLASS_CAN_ENCODE_OFFSET(byte_offset.Uint32Value())) { |
| uint32_t new_bit = CLASS_BIT_FROM_OFFSET(byte_offset.Uint32Value()); |
| CHECK_NE(new_bit, 0U); |
| reference_offsets |= new_bit; |
| } else { |
| reference_offsets = CLASS_WALK_SUPER; |
| break; |
| } |
| } |
| // Update fields in klass |
| if (is_static) { |
| klass->SetReferenceStaticOffsets(reference_offsets); |
| } else { |
| klass->SetReferenceInstanceOffsets(reference_offsets); |
| } |
| } |
| |
| String* ClassLinker::ResolveString(const DexFile& dex_file, |
| uint32_t string_idx, DexCache* dex_cache) { |
| DCHECK(dex_cache != NULL); |
| String* resolved = dex_cache->GetResolvedString(string_idx); |
| if (resolved != NULL) { |
| return resolved; |
| } |
| const DexFile::StringId& string_id = dex_file.GetStringId(string_idx); |
| int32_t utf16_length = dex_file.GetStringLength(string_id); |
| const char* utf8_data = dex_file.GetStringData(string_id); |
| String* string = intern_table_->InternStrong(utf16_length, utf8_data); |
| dex_cache->SetResolvedString(string_idx, string); |
| return string; |
| } |
| |
| Class* ClassLinker::ResolveType(const DexFile& dex_file, |
| uint16_t type_idx, |
| DexCache* dex_cache, |
| const ClassLoader* class_loader) { |
| DCHECK(dex_cache != NULL); |
| Class* resolved = dex_cache->GetResolvedType(type_idx); |
| if (resolved == NULL) { |
| const char* descriptor = dex_file.StringByTypeIdx(type_idx); |
| resolved = FindClass(descriptor, class_loader); |
| if (resolved != NULL) { |
| // TODO: we used to throw here if resolved's class loader was not the |
| // boot class loader. This was to permit different classes with the |
| // same name to be loaded simultaneously by different loaders |
| dex_cache->SetResolvedType(type_idx, resolved); |
| } else { |
| CHECK(Thread::Current()->IsExceptionPending()) |
| << "Expected pending exception for failed resolution of: " << descriptor; |
| // Convert a ClassNotFoundException to a NoClassDefFoundError |
| if (Thread::Current()->GetException()->InstanceOf(GetClassRoot(kJavaLangClassNotFoundException))) { |
| Thread::Current()->ClearException(); |
| ThrowNoClassDefFoundError("Failed resolution of: %s", descriptor); |
| } |
| } |
| } |
| return resolved; |
| } |
| |
| Method* ClassLinker::ResolveMethod(const DexFile& dex_file, |
| uint32_t method_idx, |
| DexCache* dex_cache, |
| const ClassLoader* class_loader, |
| bool is_direct) { |
| DCHECK(dex_cache != NULL); |
| Method* resolved = dex_cache->GetResolvedMethod(method_idx); |
| if (resolved != NULL) { |
| return resolved; |
| } |
| const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx); |
| Class* klass = ResolveType(dex_file, method_id.class_idx_, dex_cache, class_loader); |
| if (klass == NULL) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return NULL; |
| } |
| |
| if (is_direct) { |
| resolved = klass->FindDirectMethod(dex_cache, method_idx); |
| } else if (klass->IsInterface()) { |
| resolved = klass->FindInterfaceMethod(dex_cache, method_idx); |
| } else { |
| resolved = klass->FindVirtualMethod(dex_cache, method_idx); |
| } |
| |
| if (resolved == NULL) { |
| const char* name = dex_file.StringDataByIdx(method_id.name_idx_); |
| std::string signature(dex_file.CreateMethodSignature(method_id.proto_idx_, NULL)); |
| if (is_direct) { |
| resolved = klass->FindDirectMethod(name, signature); |
| } else if (klass->IsInterface()) { |
| resolved = klass->FindInterfaceMethod(name, signature); |
| } else { |
| resolved = klass->FindVirtualMethod(name, signature); |
| // If a virtual method isn't found, search the direct methods. This can |
| // happen when trying to access private methods directly, and allows the |
| // proper exception to be thrown in the caller. |
| if (resolved == NULL) { |
| resolved = klass->FindDirectMethod(name, signature); |
| } |
| } |
| if (resolved == NULL) { |
| ThrowNoSuchMethodError(is_direct, klass, name, signature); |
| return NULL; |
| } |
| } |
| dex_cache->SetResolvedMethod(method_idx, resolved); |
| return resolved; |
| } |
| |
| Field* ClassLinker::ResolveField(const DexFile& dex_file, |
| uint32_t field_idx, |
| DexCache* dex_cache, |
| const ClassLoader* class_loader, |
| bool is_static) { |
| DCHECK(dex_cache != NULL); |
| Field* resolved = dex_cache->GetResolvedField(field_idx); |
| if (resolved != NULL) { |
| return resolved; |
| } |
| const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx); |
| Class* klass = ResolveType(dex_file, field_id.class_idx_, dex_cache, class_loader); |
| if (klass == NULL) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return NULL; |
| } |
| |
| if (is_static) { |
| resolved = klass->FindStaticField(dex_cache, field_idx); |
| } else { |
| resolved = klass->FindInstanceField(dex_cache, field_idx); |
| } |
| |
| if (resolved == NULL) { |
| const char* name = dex_file.GetFieldName(field_id); |
| const char* type = dex_file.GetFieldTypeDescriptor(field_id); |
| if (is_static) { |
| resolved = klass->FindStaticField(name, type); |
| } else { |
| resolved = klass->FindInstanceField(name, type); |
| } |
| if (resolved == NULL) { |
| ThrowNoSuchFieldError(is_static ? "static " : "instance ", klass, type, name); |
| return NULL; |
| } |
| } |
| dex_cache->SetResolvedField(field_idx, resolved); |
| return resolved; |
| } |
| |
| Field* ClassLinker::ResolveFieldJLS(const DexFile& dex_file, |
| uint32_t field_idx, |
| DexCache* dex_cache, |
| const ClassLoader* class_loader) { |
| DCHECK(dex_cache != NULL); |
| Field* resolved = dex_cache->GetResolvedField(field_idx); |
| if (resolved != NULL) { |
| return resolved; |
| } |
| const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx); |
| Class* klass = ResolveType(dex_file, field_id.class_idx_, dex_cache, class_loader); |
| if (klass == NULL) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return NULL; |
| } |
| |
| const char* name = dex_file.GetFieldName(field_id); |
| const char* type = dex_file.GetFieldTypeDescriptor(field_id); |
| resolved = klass->FindField(name, type); |
| if (resolved != NULL) { |
| dex_cache->SetResolvedField(field_idx, resolved); |
| } else { |
| ThrowNoSuchFieldError("", klass, type, name); |
| } |
| return resolved; |
| } |
| |
| const char* ClassLinker::MethodShorty(uint32_t method_idx, Method* referrer, uint32_t* length) { |
| Class* declaring_class = referrer->GetDeclaringClass(); |
| DexCache* dex_cache = declaring_class->GetDexCache(); |
| const DexFile& dex_file = FindDexFile(dex_cache); |
| const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx); |
| return dex_file.GetMethodShorty(method_id, length); |
| } |
| |
| void ClassLinker::DumpAllClasses(int flags) const { |
| // TODO: at the time this was written, it wasn't safe to call PrettyField with the ClassLinker |
| // lock held, because it might need to resolve a field's type, which would try to take the lock. |
| std::vector<Class*> all_classes; |
| { |
| MutexLock mu(classes_lock_); |
| typedef Table::const_iterator It; // TODO: C++0x auto |
| for (It it = classes_.begin(), end = classes_.end(); it != end; ++it) { |
| all_classes.push_back(it->second); |
| } |
| for (It it = image_classes_.begin(), end = image_classes_.end(); it != end; ++it) { |
| all_classes.push_back(it->second); |
| } |
| } |
| |
| for (size_t i = 0; i < all_classes.size(); ++i) { |
| all_classes[i]->DumpClass(std::cerr, flags); |
| } |
| } |
| |
| void ClassLinker::DumpForSigQuit(std::ostream& os) const { |
| MutexLock mu(classes_lock_); |
| os << "Loaded classes: " << image_classes_.size() << " image classes; " |
| << classes_.size() << " allocated classes\n"; |
| } |
| |
| size_t ClassLinker::NumLoadedClasses() const { |
| MutexLock mu(classes_lock_); |
| return classes_.size() + image_classes_.size(); |
| } |
| |
| pid_t ClassLinker::GetClassesLockOwner() { |
| return classes_lock_.GetOwner(); |
| } |
| |
| pid_t ClassLinker::GetDexLockOwner() { |
| return dex_lock_.GetOwner(); |
| } |
| |
| void ClassLinker::SetClassRoot(ClassRoot class_root, Class* klass) { |
| DCHECK(!init_done_); |
| |
| DCHECK(klass != NULL); |
| DCHECK(klass->GetClassLoader() == NULL); |
| |
| DCHECK(class_roots_ != NULL); |
| DCHECK(class_roots_->Get(class_root) == NULL); |
| class_roots_->Set(class_root, klass); |
| } |
| |
| } // namespace art |