runtime/well_known_classes.cc - platform/art - Gitiles

 /*
  * Copyright (C) 2012 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 "well_known_classes.h"

 #include <stdlib.h>

 #include <sstream>

 #include "base/logging.h"
 #include "mirror/class.h"
 #include "ScopedLocalRef.h"
 #include "scoped_thread_state_change.h"
 #include "thread-inl.h"

 namespace art {

 jclass WellKnownClasses::com_android_dex_Dex;
 jclass WellKnownClasses::dalvik_system_DexFile;
 jclass WellKnownClasses::dalvik_system_DexPathList;
 jclass WellKnownClasses::dalvik_system_DexPathList__Element;
 jclass WellKnownClasses::dalvik_system_PathClassLoader;
 jclass WellKnownClasses::java_lang_BootClassLoader;
 jclass WellKnownClasses::java_lang_ClassLoader;
 jclass WellKnownClasses::java_lang_ClassNotFoundException;
 jclass WellKnownClasses::java_lang_Daemons;
 jclass WellKnownClasses::java_lang_Error;
 jclass WellKnownClasses::java_lang_Object;
 jclass WellKnownClasses::java_lang_reflect_AbstractMethod;
 jclass WellKnownClasses::java_lang_reflect_ArtMethod;
 jclass WellKnownClasses::java_lang_reflect_Constructor;
 jclass WellKnownClasses::java_lang_reflect_Field;
 jclass WellKnownClasses::java_lang_reflect_Method;
 jclass WellKnownClasses::java_lang_reflect_Proxy;
 jclass WellKnownClasses::java_lang_RuntimeException;
 jclass WellKnownClasses::java_lang_StackOverflowError;
 jclass WellKnownClasses::java_lang_String;
 jclass WellKnownClasses::java_lang_System;
 jclass WellKnownClasses::java_lang_Thread;
 jclass WellKnownClasses::java_lang_Thread__UncaughtExceptionHandler;
 jclass WellKnownClasses::java_lang_ThreadGroup;
 jclass WellKnownClasses::java_lang_Throwable;
 jclass WellKnownClasses::java_nio_DirectByteBuffer;
 jclass WellKnownClasses::java_util_ArrayList;
 jclass WellKnownClasses::java_util_Collections;
 jclass WellKnownClasses::libcore_util_EmptyArray;
 jclass WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk;
 jclass WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer;

 jmethodID WellKnownClasses::com_android_dex_Dex_create;
 jmethodID WellKnownClasses::java_lang_Boolean_valueOf;
 jmethodID WellKnownClasses::java_lang_Byte_valueOf;
 jmethodID WellKnownClasses::java_lang_Character_valueOf;
 jmethodID WellKnownClasses::java_lang_ClassLoader_loadClass;
 jmethodID WellKnownClasses::java_lang_ClassNotFoundException_init;
 jmethodID WellKnownClasses::java_lang_Daemons_requestHeapTrim;
 jmethodID WellKnownClasses::java_lang_Daemons_start;
 jmethodID WellKnownClasses::java_lang_Daemons_stop;
 jmethodID WellKnownClasses::java_lang_Double_valueOf;
 jmethodID WellKnownClasses::java_lang_Float_valueOf;
 jmethodID WellKnownClasses::java_lang_Integer_valueOf;
 jmethodID WellKnownClasses::java_lang_Long_valueOf;
 jmethodID WellKnownClasses::java_lang_ref_FinalizerReference_add;
 jmethodID WellKnownClasses::java_lang_ref_ReferenceQueue_add;
 jmethodID WellKnownClasses::java_lang_reflect_Proxy_invoke;
 jmethodID WellKnownClasses::java_lang_Runtime_nativeLoad;
 jmethodID WellKnownClasses::java_lang_Short_valueOf;
 jmethodID WellKnownClasses::java_lang_System_runFinalization = NULL;
 jmethodID WellKnownClasses::java_lang_Thread_init;
 jmethodID WellKnownClasses::java_lang_Thread_run;
 jmethodID WellKnownClasses::java_lang_Thread__UncaughtExceptionHandler_uncaughtException;
 jmethodID WellKnownClasses::java_lang_ThreadGroup_removeThread;
 jmethodID WellKnownClasses::java_nio_DirectByteBuffer_init;
 jmethodID WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer_broadcast;
 jmethodID WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer_dispatch;

 jfieldID WellKnownClasses::dalvik_system_DexFile_cookie;
 jfieldID WellKnownClasses::dalvik_system_PathClassLoader_pathList;
 jfieldID WellKnownClasses::dalvik_system_DexPathList_dexElements;
 jfieldID WellKnownClasses::dalvik_system_DexPathList__Element_dexFile;
 jfieldID WellKnownClasses::java_lang_Thread_daemon;
 jfieldID WellKnownClasses::java_lang_Thread_group;
 jfieldID WellKnownClasses::java_lang_Thread_lock;
 jfieldID WellKnownClasses::java_lang_Thread_name;
 jfieldID WellKnownClasses::java_lang_Thread_priority;
 jfieldID WellKnownClasses::java_lang_Thread_uncaughtHandler;
 jfieldID WellKnownClasses::java_lang_Thread_nativePeer;
 jfieldID WellKnownClasses::java_lang_ThreadGroup_groups;
 jfieldID WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup;
 jfieldID WellKnownClasses::java_lang_ThreadGroup_name;
 jfieldID WellKnownClasses::java_lang_ThreadGroup_parent;
 jfieldID WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup;
 jfieldID WellKnownClasses::java_lang_Throwable_cause;
 jfieldID WellKnownClasses::java_lang_Throwable_detailMessage;
 jfieldID WellKnownClasses::java_lang_Throwable_stackTrace;
 jfieldID WellKnownClasses::java_lang_Throwable_stackState;
 jfieldID WellKnownClasses::java_lang_Throwable_suppressedExceptions;
 jfieldID WellKnownClasses::java_lang_reflect_AbstractMethod_artMethod;
 jfieldID WellKnownClasses::java_lang_reflect_Field_artField;
 jfieldID WellKnownClasses::java_lang_reflect_Proxy_h;
 jfieldID WellKnownClasses::java_nio_DirectByteBuffer_capacity;
 jfieldID WellKnownClasses::java_nio_DirectByteBuffer_effectiveDirectAddress;
 jfieldID WellKnownClasses::java_util_ArrayList_array;
 jfieldID WellKnownClasses::java_util_ArrayList_size;
 jfieldID WellKnownClasses::java_util_Collections_EMPTY_LIST;
 jfieldID WellKnownClasses::libcore_util_EmptyArray_STACK_TRACE_ELEMENT;
 jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_data;
 jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_length;
 jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_offset;
 jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_type;

 static jclass CacheClass(JNIEnv* env, const char* jni_class_name) {
   ScopedLocalRef<jclass> c(env, env->FindClass(jni_class_name));
   if (c.get() == NULL) {
     LOG(FATAL) << "Couldn't find class: " << jni_class_name;
   }
   return reinterpret_cast<jclass>(env->NewGlobalRef(c.get()));
 }

 static jfieldID CacheField(JNIEnv* env, jclass c, bool is_static,
                            const char* name, const char* signature) {
   jfieldID fid = (is_static ?
                   env->GetStaticFieldID(c, name, signature) :
                   env->GetFieldID(c, name, signature));
   if (fid == NULL) {
     ScopedObjectAccess soa(env);
     std::ostringstream os;
     WellKnownClasses::ToClass(c)->DumpClass(os, mirror::Class::kDumpClassFullDetail);
     LOG(FATAL) << "Couldn't find field \"" << name << "\" with signature \"" << signature << "\": "
                << os.str();
   }
   return fid;
 }

 jmethodID CacheMethod(JNIEnv* env, jclass c, bool is_static,
                       const char* name, const char* signature) {
   jmethodID mid = (is_static ?
                    env->GetStaticMethodID(c, name, signature) :
                    env->GetMethodID(c, name, signature));
   if (mid == NULL) {
     ScopedObjectAccess soa(env);
     std::ostringstream os;
     WellKnownClasses::ToClass(c)->DumpClass(os, mirror::Class::kDumpClassFullDetail);
     LOG(FATAL) << "Couldn't find method \"" << name << "\" with signature \"" << signature << "\": "
                << os.str();
   }
   return mid;
 }

 static jmethodID CachePrimitiveBoxingMethod(JNIEnv* env, char prim_name, const char* boxed_name) {
   ScopedLocalRef<jclass> boxed_class(env, env->FindClass(boxed_name));
   return CacheMethod(env, boxed_class.get(), true, "valueOf",
                      StringPrintf("(%c)L%s;", prim_name, boxed_name).c_str());
 }

 void WellKnownClasses::Init(JNIEnv* env) {
   com_android_dex_Dex = CacheClass(env, "com/android/dex/Dex");
   dalvik_system_DexFile = CacheClass(env, "dalvik/system/DexFile");
   dalvik_system_DexPathList = CacheClass(env, "dalvik/system/DexPathList");
   dalvik_system_DexPathList__Element = CacheClass(env, "dalvik/system/DexPathList$Element");
   dalvik_system_PathClassLoader = CacheClass(env, "dalvik/system/PathClassLoader");
   java_lang_BootClassLoader = CacheClass(env, "java/lang/BootClassLoader");
   java_lang_ClassLoader = CacheClass(env, "java/lang/ClassLoader");
   java_lang_ClassNotFoundException = CacheClass(env, "java/lang/ClassNotFoundException");
   java_lang_Daemons = CacheClass(env, "java/lang/Daemons");
   java_lang_Object = CacheClass(env, "java/lang/Object");
   java_lang_Error = CacheClass(env, "java/lang/Error");
   java_lang_reflect_AbstractMethod = CacheClass(env, "java/lang/reflect/AbstractMethod");
   java_lang_reflect_ArtMethod = CacheClass(env, "java/lang/reflect/ArtMethod");
   java_lang_reflect_Constructor = CacheClass(env, "java/lang/reflect/Constructor");
   java_lang_reflect_Field = CacheClass(env, "java/lang/reflect/Field");
   java_lang_reflect_Method = CacheClass(env, "java/lang/reflect/Method");
   java_lang_reflect_Proxy = CacheClass(env, "java/lang/reflect/Proxy");
   java_lang_RuntimeException = CacheClass(env, "java/lang/RuntimeException");
   java_lang_StackOverflowError = CacheClass(env, "java/lang/StackOverflowError");
   java_lang_String = CacheClass(env, "java/lang/String");
   java_lang_System = CacheClass(env, "java/lang/System");
   java_lang_Thread = CacheClass(env, "java/lang/Thread");
   java_lang_Thread__UncaughtExceptionHandler = CacheClass(env,
       "java/lang/Thread$UncaughtExceptionHandler");
   java_lang_ThreadGroup = CacheClass(env, "java/lang/ThreadGroup");
   java_lang_Throwable = CacheClass(env, "java/lang/Throwable");
   java_nio_DirectByteBuffer = CacheClass(env, "java/nio/DirectByteBuffer");
   java_util_ArrayList = CacheClass(env, "java/util/ArrayList");
   java_util_Collections = CacheClass(env, "java/util/Collections");
   libcore_util_EmptyArray = CacheClass(env, "libcore/util/EmptyArray");
   org_apache_harmony_dalvik_ddmc_Chunk = CacheClass(env, "org/apache/harmony/dalvik/ddmc/Chunk");
   org_apache_harmony_dalvik_ddmc_DdmServer = CacheClass(env, "org/apache/harmony/dalvik/ddmc/DdmServer");

   com_android_dex_Dex_create = CacheMethod(env, com_android_dex_Dex, true, "create", "(Ljava/nio/ByteBuffer;)Lcom/android/dex/Dex;");
   java_lang_ClassNotFoundException_init = CacheMethod(env, java_lang_ClassNotFoundException, false, "<init>", "(Ljava/lang/String;Ljava/lang/Throwable;)V");
   java_lang_ClassLoader_loadClass = CacheMethod(env, java_lang_ClassLoader, false, "loadClass", "(Ljava/lang/String;)Ljava/lang/Class;");

   java_lang_Daemons_requestHeapTrim = CacheMethod(env, java_lang_Daemons, true, "requestHeapTrim", "()V");
   java_lang_Daemons_start = CacheMethod(env, java_lang_Daemons, true, "start", "()V");
   java_lang_Daemons_stop = CacheMethod(env, java_lang_Daemons, true, "stop", "()V");

   ScopedLocalRef<jclass> java_lang_ref_FinalizerReference(env, env->FindClass("java/lang/ref/FinalizerReference"));
   java_lang_ref_FinalizerReference_add = CacheMethod(env, java_lang_ref_FinalizerReference.get(), true, "add", "(Ljava/lang/Object;)V");
   ScopedLocalRef<jclass> java_lang_ref_ReferenceQueue(env, env->FindClass("java/lang/ref/ReferenceQueue"));
   java_lang_ref_ReferenceQueue_add = CacheMethod(env, java_lang_ref_ReferenceQueue.get(), true, "add", "(Ljava/lang/ref/Reference;)V");

   java_lang_reflect_Proxy_invoke = CacheMethod(env, java_lang_reflect_Proxy, true, "invoke", "(Ljava/lang/reflect/Proxy;Ljava/lang/reflect/ArtMethod;[Ljava/lang/Object;)Ljava/lang/Object;");
   java_lang_Thread_init = CacheMethod(env, java_lang_Thread, false, "<init>", "(Ljava/lang/ThreadGroup;Ljava/lang/String;IZ)V");
   java_lang_Thread_run = CacheMethod(env, java_lang_Thread, false, "run", "()V");
   java_lang_Thread__UncaughtExceptionHandler_uncaughtException = CacheMethod(env, java_lang_Thread__UncaughtExceptionHandler, false, "uncaughtException", "(Ljava/lang/Thread;Ljava/lang/Throwable;)V");
   java_lang_ThreadGroup_removeThread = CacheMethod(env, java_lang_ThreadGroup, false, "removeThread", "(Ljava/lang/Thread;)V");
   java_nio_DirectByteBuffer_init = CacheMethod(env, java_nio_DirectByteBuffer, false, "<init>", "(JI)V");
   org_apache_harmony_dalvik_ddmc_DdmServer_broadcast = CacheMethod(env, org_apache_harmony_dalvik_ddmc_DdmServer, true, "broadcast", "(I)V");
   org_apache_harmony_dalvik_ddmc_DdmServer_dispatch = CacheMethod(env, org_apache_harmony_dalvik_ddmc_DdmServer, true, "dispatch", "(I[BII)Lorg/apache/harmony/dalvik/ddmc/Chunk;");

   dalvik_system_DexFile_cookie = CacheField(env, dalvik_system_DexFile, false, "mCookie", "J");
   dalvik_system_PathClassLoader_pathList = CacheField(env, dalvik_system_PathClassLoader, false, "pathList", "Ldalvik/system/DexPathList;");
   dalvik_system_DexPathList_dexElements = CacheField(env, dalvik_system_DexPathList, false, "dexElements", "[Ldalvik/system/DexPathList$Element;");
   dalvik_system_DexPathList__Element_dexFile = CacheField(env, dalvik_system_DexPathList__Element, false, "dexFile", "Ldalvik/system/DexFile;");
   java_lang_Thread_daemon = CacheField(env, java_lang_Thread, false, "daemon", "Z");
   java_lang_Thread_group = CacheField(env, java_lang_Thread, false, "group", "Ljava/lang/ThreadGroup;");
   java_lang_Thread_lock = CacheField(env, java_lang_Thread, false, "lock", "Ljava/lang/Object;");
   java_lang_Thread_name = CacheField(env, java_lang_Thread, false, "name", "Ljava/lang/String;");
   java_lang_Thread_priority = CacheField(env, java_lang_Thread, false, "priority", "I");
   java_lang_Thread_uncaughtHandler = CacheField(env, java_lang_Thread, false, "uncaughtHandler", "Ljava/lang/Thread$UncaughtExceptionHandler;");
   java_lang_Thread_nativePeer = CacheField(env, java_lang_Thread, false, "nativePeer", "J");
   java_lang_ThreadGroup_groups = CacheField(env, java_lang_ThreadGroup, false, "groups", "Ljava/util/List;");
   java_lang_ThreadGroup_mainThreadGroup = CacheField(env, java_lang_ThreadGroup, true, "mainThreadGroup", "Ljava/lang/ThreadGroup;");
   java_lang_ThreadGroup_name = CacheField(env, java_lang_ThreadGroup, false, "name", "Ljava/lang/String;");
   java_lang_ThreadGroup_parent = CacheField(env, java_lang_ThreadGroup, false, "parent", "Ljava/lang/ThreadGroup;");
   java_lang_ThreadGroup_systemThreadGroup = CacheField(env, java_lang_ThreadGroup, true, "systemThreadGroup", "Ljava/lang/ThreadGroup;");
   java_lang_Throwable_cause = CacheField(env, java_lang_Throwable, false, "cause", "Ljava/lang/Throwable;");
   java_lang_Throwable_detailMessage = CacheField(env, java_lang_Throwable, false, "detailMessage", "Ljava/lang/String;");
   java_lang_Throwable_stackTrace = CacheField(env, java_lang_Throwable, false, "stackTrace", "[Ljava/lang/StackTraceElement;");
   java_lang_Throwable_stackState = CacheField(env, java_lang_Throwable, false, "stackState", "Ljava/lang/Object;");
   java_lang_Throwable_suppressedExceptions = CacheField(env, java_lang_Throwable, false, "suppressedExceptions", "Ljava/util/List;");
   java_lang_reflect_AbstractMethod_artMethod = CacheField(env, java_lang_reflect_AbstractMethod, false, "artMethod", "Ljava/lang/reflect/ArtMethod;");
   java_lang_reflect_Field_artField = CacheField(env, java_lang_reflect_Field, false, "artField", "Ljava/lang/reflect/ArtField;");
   java_lang_reflect_Proxy_h = CacheField(env, java_lang_reflect_Proxy, false, "h", "Ljava/lang/reflect/InvocationHandler;");
   java_nio_DirectByteBuffer_capacity = CacheField(env, java_nio_DirectByteBuffer, false, "capacity", "I");
   java_nio_DirectByteBuffer_effectiveDirectAddress = CacheField(env, java_nio_DirectByteBuffer, false, "effectiveDirectAddress", "J");
   java_util_ArrayList_array = CacheField(env, java_util_ArrayList, false, "array", "[Ljava/lang/Object;");
   java_util_ArrayList_size = CacheField(env, java_util_ArrayList, false, "size", "I");
   java_util_Collections_EMPTY_LIST = CacheField(env, java_util_Collections, true, "EMPTY_LIST", "Ljava/util/List;");
   libcore_util_EmptyArray_STACK_TRACE_ELEMENT = CacheField(env, libcore_util_EmptyArray, true, "STACK_TRACE_ELEMENT", "[Ljava/lang/StackTraceElement;");
   org_apache_harmony_dalvik_ddmc_Chunk_data = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "data", "[B");
   org_apache_harmony_dalvik_ddmc_Chunk_length = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "length", "I");
   org_apache_harmony_dalvik_ddmc_Chunk_offset = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "offset", "I");
   org_apache_harmony_dalvik_ddmc_Chunk_type = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "type", "I");

   java_lang_Boolean_valueOf = CachePrimitiveBoxingMethod(env, 'Z', "java/lang/Boolean");
   java_lang_Byte_valueOf = CachePrimitiveBoxingMethod(env, 'B', "java/lang/Byte");
   java_lang_Character_valueOf = CachePrimitiveBoxingMethod(env, 'C', "java/lang/Character");
   java_lang_Double_valueOf = CachePrimitiveBoxingMethod(env, 'D', "java/lang/Double");
   java_lang_Float_valueOf = CachePrimitiveBoxingMethod(env, 'F', "java/lang/Float");
   java_lang_Integer_valueOf = CachePrimitiveBoxingMethod(env, 'I', "java/lang/Integer");
   java_lang_Long_valueOf = CachePrimitiveBoxingMethod(env, 'J', "java/lang/Long");
   java_lang_Short_valueOf = CachePrimitiveBoxingMethod(env, 'S', "java/lang/Short");
 }

 void WellKnownClasses::LateInit(JNIEnv* env) {
   ScopedLocalRef<jclass> java_lang_Runtime(env, env->FindClass("java/lang/Runtime"));
   java_lang_Runtime_nativeLoad = CacheMethod(env, java_lang_Runtime.get(), true, "nativeLoad", "(Ljava/lang/String;Ljava/lang/ClassLoader;Ljava/lang/String;)Ljava/lang/String;");
 }

 mirror::Class* WellKnownClasses::ToClass(jclass global_jclass) {
   return reinterpret_cast<mirror::Class*>(Thread::Current()->DecodeJObject(global_jclass));
 }

 }  // namespace art
	/*
	* Copyright (C) 2012 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 "well_known_classes.h"

	#include <stdlib.h>

	#include <sstream>

	#include "base/logging.h"
	#include "mirror/class.h"
	#include "ScopedLocalRef.h"
	#include "scoped_thread_state_change.h"
	#include "thread-inl.h"

	namespace art {

	jclass WellKnownClasses::com_android_dex_Dex;
	jclass WellKnownClasses::dalvik_system_DexFile;
	jclass WellKnownClasses::dalvik_system_DexPathList;
	jclass WellKnownClasses::dalvik_system_DexPathList__Element;
	jclass WellKnownClasses::dalvik_system_PathClassLoader;
	jclass WellKnownClasses::java_lang_BootClassLoader;
	jclass WellKnownClasses::java_lang_ClassLoader;
	jclass WellKnownClasses::java_lang_ClassNotFoundException;
	jclass WellKnownClasses::java_lang_Daemons;
	jclass WellKnownClasses::java_lang_Error;
	jclass WellKnownClasses::java_lang_Object;
	jclass WellKnownClasses::java_lang_reflect_AbstractMethod;
	jclass WellKnownClasses::java_lang_reflect_ArtMethod;
	jclass WellKnownClasses::java_lang_reflect_Constructor;
	jclass WellKnownClasses::java_lang_reflect_Field;
	jclass WellKnownClasses::java_lang_reflect_Method;
	jclass WellKnownClasses::java_lang_reflect_Proxy;
	jclass WellKnownClasses::java_lang_RuntimeException;
	jclass WellKnownClasses::java_lang_StackOverflowError;
	jclass WellKnownClasses::java_lang_String;
	jclass WellKnownClasses::java_lang_System;
	jclass WellKnownClasses::java_lang_Thread;
	jclass WellKnownClasses::java_lang_Thread__UncaughtExceptionHandler;
	jclass WellKnownClasses::java_lang_ThreadGroup;
	jclass WellKnownClasses::java_lang_Throwable;
	jclass WellKnownClasses::java_nio_DirectByteBuffer;
	jclass WellKnownClasses::java_util_ArrayList;
	jclass WellKnownClasses::java_util_Collections;
	jclass WellKnownClasses::libcore_util_EmptyArray;
	jclass WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk;
	jclass WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer;

	jmethodID WellKnownClasses::com_android_dex_Dex_create;
	jmethodID WellKnownClasses::java_lang_Boolean_valueOf;
	jmethodID WellKnownClasses::java_lang_Byte_valueOf;
	jmethodID WellKnownClasses::java_lang_Character_valueOf;
	jmethodID WellKnownClasses::java_lang_ClassLoader_loadClass;
	jmethodID WellKnownClasses::java_lang_ClassNotFoundException_init;
	jmethodID WellKnownClasses::java_lang_Daemons_requestHeapTrim;
	jmethodID WellKnownClasses::java_lang_Daemons_start;
	jmethodID WellKnownClasses::java_lang_Daemons_stop;
	jmethodID WellKnownClasses::java_lang_Double_valueOf;
	jmethodID WellKnownClasses::java_lang_Float_valueOf;
	jmethodID WellKnownClasses::java_lang_Integer_valueOf;
	jmethodID WellKnownClasses::java_lang_Long_valueOf;
	jmethodID WellKnownClasses::java_lang_ref_FinalizerReference_add;
	jmethodID WellKnownClasses::java_lang_ref_ReferenceQueue_add;
	jmethodID WellKnownClasses::java_lang_reflect_Proxy_invoke;
	jmethodID WellKnownClasses::java_lang_Runtime_nativeLoad;
	jmethodID WellKnownClasses::java_lang_Short_valueOf;
	jmethodID WellKnownClasses::java_lang_System_runFinalization = NULL;
	jmethodID WellKnownClasses::java_lang_Thread_init;
	jmethodID WellKnownClasses::java_lang_Thread_run;
	jmethodID WellKnownClasses::java_lang_Thread__UncaughtExceptionHandler_uncaughtException;
	jmethodID WellKnownClasses::java_lang_ThreadGroup_removeThread;
	jmethodID WellKnownClasses::java_nio_DirectByteBuffer_init;
	jmethodID WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer_broadcast;
	jmethodID WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer_dispatch;

	jfieldID WellKnownClasses::dalvik_system_DexFile_cookie;
	jfieldID WellKnownClasses::dalvik_system_PathClassLoader_pathList;
	jfieldID WellKnownClasses::dalvik_system_DexPathList_dexElements;
	jfieldID WellKnownClasses::dalvik_system_DexPathList__Element_dexFile;
	jfieldID WellKnownClasses::java_lang_Thread_daemon;
	jfieldID WellKnownClasses::java_lang_Thread_group;
	jfieldID WellKnownClasses::java_lang_Thread_lock;
	jfieldID WellKnownClasses::java_lang_Thread_name;
	jfieldID WellKnownClasses::java_lang_Thread_priority;
	jfieldID WellKnownClasses::java_lang_Thread_uncaughtHandler;
	jfieldID WellKnownClasses::java_lang_Thread_nativePeer;
	jfieldID WellKnownClasses::java_lang_ThreadGroup_groups;
	jfieldID WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup;
	jfieldID WellKnownClasses::java_lang_ThreadGroup_name;
	jfieldID WellKnownClasses::java_lang_ThreadGroup_parent;
	jfieldID WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup;
	jfieldID WellKnownClasses::java_lang_Throwable_cause;
	jfieldID WellKnownClasses::java_lang_Throwable_detailMessage;
	jfieldID WellKnownClasses::java_lang_Throwable_stackTrace;
	jfieldID WellKnownClasses::java_lang_Throwable_stackState;
	jfieldID WellKnownClasses::java_lang_Throwable_suppressedExceptions;
	jfieldID WellKnownClasses::java_lang_reflect_AbstractMethod_artMethod;
	jfieldID WellKnownClasses::java_lang_reflect_Field_artField;
	jfieldID WellKnownClasses::java_lang_reflect_Proxy_h;
	jfieldID WellKnownClasses::java_nio_DirectByteBuffer_capacity;
	jfieldID WellKnownClasses::java_nio_DirectByteBuffer_effectiveDirectAddress;
	jfieldID WellKnownClasses::java_util_ArrayList_array;
	jfieldID WellKnownClasses::java_util_ArrayList_size;
	jfieldID WellKnownClasses::java_util_Collections_EMPTY_LIST;
	jfieldID WellKnownClasses::libcore_util_EmptyArray_STACK_TRACE_ELEMENT;
	jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_data;
	jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_length;
	jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_offset;
	jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_type;

	static jclass CacheClass(JNIEnv* env, const char* jni_class_name) {
	ScopedLocalRef<jclass> c(env, env->FindClass(jni_class_name));
	if (c.get() == NULL) {
	LOG(FATAL) << "Couldn't find class: " << jni_class_name;
	}
	return reinterpret_cast<jclass>(env->NewGlobalRef(c.get()));
	}

	static jfieldID CacheField(JNIEnv* env, jclass c, bool is_static,
	const char* name, const char* signature) {
	jfieldID fid = (is_static ?
	env->GetStaticFieldID(c, name, signature) :
	env->GetFieldID(c, name, signature));
	if (fid == NULL) {
	ScopedObjectAccess soa(env);
	std::ostringstream os;
	WellKnownClasses::ToClass(c)->DumpClass(os, mirror::Class::kDumpClassFullDetail);
	LOG(FATAL) << "Couldn't find field \"" << name << "\" with signature \"" << signature << "\": "
	<< os.str();
	}
	return fid;
	}

	jmethodID CacheMethod(JNIEnv* env, jclass c, bool is_static,
	const char* name, const char* signature) {
	jmethodID mid = (is_static ?
	env->GetStaticMethodID(c, name, signature) :
	env->GetMethodID(c, name, signature));
	if (mid == NULL) {
	ScopedObjectAccess soa(env);
	std::ostringstream os;
	WellKnownClasses::ToClass(c)->DumpClass(os, mirror::Class::kDumpClassFullDetail);
	LOG(FATAL) << "Couldn't find method \"" << name << "\" with signature \"" << signature << "\": "
	<< os.str();
	}
	return mid;
	}

	static jmethodID CachePrimitiveBoxingMethod(JNIEnv* env, char prim_name, const char* boxed_name) {
	ScopedLocalRef<jclass> boxed_class(env, env->FindClass(boxed_name));
	return CacheMethod(env, boxed_class.get(), true, "valueOf",
	StringPrintf("(%c)L%s;", prim_name, boxed_name).c_str());
	}

	void WellKnownClasses::Init(JNIEnv* env) {
	com_android_dex_Dex = CacheClass(env, "com/android/dex/Dex");
	dalvik_system_DexFile = CacheClass(env, "dalvik/system/DexFile");
	dalvik_system_DexPathList = CacheClass(env, "dalvik/system/DexPathList");
	dalvik_system_DexPathList__Element = CacheClass(env, "dalvik/system/DexPathList$Element");
	dalvik_system_PathClassLoader = CacheClass(env, "dalvik/system/PathClassLoader");
	java_lang_BootClassLoader = CacheClass(env, "java/lang/BootClassLoader");
	java_lang_ClassLoader = CacheClass(env, "java/lang/ClassLoader");
	java_lang_ClassNotFoundException = CacheClass(env, "java/lang/ClassNotFoundException");
	java_lang_Daemons = CacheClass(env, "java/lang/Daemons");
	java_lang_Object = CacheClass(env, "java/lang/Object");
	java_lang_Error = CacheClass(env, "java/lang/Error");
	java_lang_reflect_AbstractMethod = CacheClass(env, "java/lang/reflect/AbstractMethod");
	java_lang_reflect_ArtMethod = CacheClass(env, "java/lang/reflect/ArtMethod");
	java_lang_reflect_Constructor = CacheClass(env, "java/lang/reflect/Constructor");
	java_lang_reflect_Field = CacheClass(env, "java/lang/reflect/Field");
	java_lang_reflect_Method = CacheClass(env, "java/lang/reflect/Method");
	java_lang_reflect_Proxy = CacheClass(env, "java/lang/reflect/Proxy");
	java_lang_RuntimeException = CacheClass(env, "java/lang/RuntimeException");
	java_lang_StackOverflowError = CacheClass(env, "java/lang/StackOverflowError");
	java_lang_String = CacheClass(env, "java/lang/String");
	java_lang_System = CacheClass(env, "java/lang/System");
	java_lang_Thread = CacheClass(env, "java/lang/Thread");
	java_lang_Thread__UncaughtExceptionHandler = CacheClass(env,
	"java/lang/Thread$UncaughtExceptionHandler");
	java_lang_ThreadGroup = CacheClass(env, "java/lang/ThreadGroup");
	java_lang_Throwable = CacheClass(env, "java/lang/Throwable");
	java_nio_DirectByteBuffer = CacheClass(env, "java/nio/DirectByteBuffer");
	java_util_ArrayList = CacheClass(env, "java/util/ArrayList");
	java_util_Collections = CacheClass(env, "java/util/Collections");
	libcore_util_EmptyArray = CacheClass(env, "libcore/util/EmptyArray");
	org_apache_harmony_dalvik_ddmc_Chunk = CacheClass(env, "org/apache/harmony/dalvik/ddmc/Chunk");
	org_apache_harmony_dalvik_ddmc_DdmServer = CacheClass(env, "org/apache/harmony/dalvik/ddmc/DdmServer");

	com_android_dex_Dex_create = CacheMethod(env, com_android_dex_Dex, true, "create", "(Ljava/nio/ByteBuffer;)Lcom/android/dex/Dex;");
	java_lang_ClassNotFoundException_init = CacheMethod(env, java_lang_ClassNotFoundException, false, "<init>", "(Ljava/lang/String;Ljava/lang/Throwable;)V");
	java_lang_ClassLoader_loadClass = CacheMethod(env, java_lang_ClassLoader, false, "loadClass", "(Ljava/lang/String;)Ljava/lang/Class;");

	java_lang_Daemons_requestHeapTrim = CacheMethod(env, java_lang_Daemons, true, "requestHeapTrim", "()V");
	java_lang_Daemons_start = CacheMethod(env, java_lang_Daemons, true, "start", "()V");
	java_lang_Daemons_stop = CacheMethod(env, java_lang_Daemons, true, "stop", "()V");

	ScopedLocalRef<jclass> java_lang_ref_FinalizerReference(env, env->FindClass("java/lang/ref/FinalizerReference"));
	java_lang_ref_FinalizerReference_add = CacheMethod(env, java_lang_ref_FinalizerReference.get(), true, "add", "(Ljava/lang/Object;)V");
	ScopedLocalRef<jclass> java_lang_ref_ReferenceQueue(env, env->FindClass("java/lang/ref/ReferenceQueue"));
	java_lang_ref_ReferenceQueue_add = CacheMethod(env, java_lang_ref_ReferenceQueue.get(), true, "add", "(Ljava/lang/ref/Reference;)V");

	java_lang_reflect_Proxy_invoke = CacheMethod(env, java_lang_reflect_Proxy, true, "invoke", "(Ljava/lang/reflect/Proxy;Ljava/lang/reflect/ArtMethod;[Ljava/lang/Object;)Ljava/lang/Object;");
	java_lang_Thread_init = CacheMethod(env, java_lang_Thread, false, "<init>", "(Ljava/lang/ThreadGroup;Ljava/lang/String;IZ)V");
	java_lang_Thread_run = CacheMethod(env, java_lang_Thread, false, "run", "()V");
	java_lang_Thread__UncaughtExceptionHandler_uncaughtException = CacheMethod(env, java_lang_Thread__UncaughtExceptionHandler, false, "uncaughtException", "(Ljava/lang/Thread;Ljava/lang/Throwable;)V");
	java_lang_ThreadGroup_removeThread = CacheMethod(env, java_lang_ThreadGroup, false, "removeThread", "(Ljava/lang/Thread;)V");
	java_nio_DirectByteBuffer_init = CacheMethod(env, java_nio_DirectByteBuffer, false, "<init>", "(JI)V");
	org_apache_harmony_dalvik_ddmc_DdmServer_broadcast = CacheMethod(env, org_apache_harmony_dalvik_ddmc_DdmServer, true, "broadcast", "(I)V");
	org_apache_harmony_dalvik_ddmc_DdmServer_dispatch = CacheMethod(env, org_apache_harmony_dalvik_ddmc_DdmServer, true, "dispatch", "(I[BII)Lorg/apache/harmony/dalvik/ddmc/Chunk;");

	dalvik_system_DexFile_cookie = CacheField(env, dalvik_system_DexFile, false, "mCookie", "J");
	dalvik_system_PathClassLoader_pathList = CacheField(env, dalvik_system_PathClassLoader, false, "pathList", "Ldalvik/system/DexPathList;");
	dalvik_system_DexPathList_dexElements = CacheField(env, dalvik_system_DexPathList, false, "dexElements", "[Ldalvik/system/DexPathList$Element;");
	dalvik_system_DexPathList__Element_dexFile = CacheField(env, dalvik_system_DexPathList__Element, false, "dexFile", "Ldalvik/system/DexFile;");
	java_lang_Thread_daemon = CacheField(env, java_lang_Thread, false, "daemon", "Z");
	java_lang_Thread_group = CacheField(env, java_lang_Thread, false, "group", "Ljava/lang/ThreadGroup;");
	java_lang_Thread_lock = CacheField(env, java_lang_Thread, false, "lock", "Ljava/lang/Object;");
	java_lang_Thread_name = CacheField(env, java_lang_Thread, false, "name", "Ljava/lang/String;");
	java_lang_Thread_priority = CacheField(env, java_lang_Thread, false, "priority", "I");
	java_lang_Thread_uncaughtHandler = CacheField(env, java_lang_Thread, false, "uncaughtHandler", "Ljava/lang/Thread$UncaughtExceptionHandler;");
	java_lang_Thread_nativePeer = CacheField(env, java_lang_Thread, false, "nativePeer", "J");
	java_lang_ThreadGroup_groups = CacheField(env, java_lang_ThreadGroup, false, "groups", "Ljava/util/List;");
	java_lang_ThreadGroup_mainThreadGroup = CacheField(env, java_lang_ThreadGroup, true, "mainThreadGroup", "Ljava/lang/ThreadGroup;");
	java_lang_ThreadGroup_name = CacheField(env, java_lang_ThreadGroup, false, "name", "Ljava/lang/String;");
	java_lang_ThreadGroup_parent = CacheField(env, java_lang_ThreadGroup, false, "parent", "Ljava/lang/ThreadGroup;");
	java_lang_ThreadGroup_systemThreadGroup = CacheField(env, java_lang_ThreadGroup, true, "systemThreadGroup", "Ljava/lang/ThreadGroup;");
	java_lang_Throwable_cause = CacheField(env, java_lang_Throwable, false, "cause", "Ljava/lang/Throwable;");
	java_lang_Throwable_detailMessage = CacheField(env, java_lang_Throwable, false, "detailMessage", "Ljava/lang/String;");
	java_lang_Throwable_stackTrace = CacheField(env, java_lang_Throwable, false, "stackTrace", "[Ljava/lang/StackTraceElement;");
	java_lang_Throwable_stackState = CacheField(env, java_lang_Throwable, false, "stackState", "Ljava/lang/Object;");
	java_lang_Throwable_suppressedExceptions = CacheField(env, java_lang_Throwable, false, "suppressedExceptions", "Ljava/util/List;");
	java_lang_reflect_AbstractMethod_artMethod = CacheField(env, java_lang_reflect_AbstractMethod, false, "artMethod", "Ljava/lang/reflect/ArtMethod;");
	java_lang_reflect_Field_artField = CacheField(env, java_lang_reflect_Field, false, "artField", "Ljava/lang/reflect/ArtField;");
	java_lang_reflect_Proxy_h = CacheField(env, java_lang_reflect_Proxy, false, "h", "Ljava/lang/reflect/InvocationHandler;");
	java_nio_DirectByteBuffer_capacity = CacheField(env, java_nio_DirectByteBuffer, false, "capacity", "I");
	java_nio_DirectByteBuffer_effectiveDirectAddress = CacheField(env, java_nio_DirectByteBuffer, false, "effectiveDirectAddress", "J");
	java_util_ArrayList_array = CacheField(env, java_util_ArrayList, false, "array", "[Ljava/lang/Object;");
	java_util_ArrayList_size = CacheField(env, java_util_ArrayList, false, "size", "I");
	java_util_Collections_EMPTY_LIST = CacheField(env, java_util_Collections, true, "EMPTY_LIST", "Ljava/util/List;");
	libcore_util_EmptyArray_STACK_TRACE_ELEMENT = CacheField(env, libcore_util_EmptyArray, true, "STACK_TRACE_ELEMENT", "[Ljava/lang/StackTraceElement;");
	org_apache_harmony_dalvik_ddmc_Chunk_data = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "data", "[B");
	org_apache_harmony_dalvik_ddmc_Chunk_length = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "length", "I");
	org_apache_harmony_dalvik_ddmc_Chunk_offset = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "offset", "I");
	org_apache_harmony_dalvik_ddmc_Chunk_type = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "type", "I");

	java_lang_Boolean_valueOf = CachePrimitiveBoxingMethod(env, 'Z', "java/lang/Boolean");
	java_lang_Byte_valueOf = CachePrimitiveBoxingMethod(env, 'B', "java/lang/Byte");
	java_lang_Character_valueOf = CachePrimitiveBoxingMethod(env, 'C', "java/lang/Character");
	java_lang_Double_valueOf = CachePrimitiveBoxingMethod(env, 'D', "java/lang/Double");
	java_lang_Float_valueOf = CachePrimitiveBoxingMethod(env, 'F', "java/lang/Float");
	java_lang_Integer_valueOf = CachePrimitiveBoxingMethod(env, 'I', "java/lang/Integer");
	java_lang_Long_valueOf = CachePrimitiveBoxingMethod(env, 'J', "java/lang/Long");
	java_lang_Short_valueOf = CachePrimitiveBoxingMethod(env, 'S', "java/lang/Short");
	}

	void WellKnownClasses::LateInit(JNIEnv* env) {
	ScopedLocalRef<jclass> java_lang_Runtime(env, env->FindClass("java/lang/Runtime"));
	java_lang_Runtime_nativeLoad = CacheMethod(env, java_lang_Runtime.get(), true, "nativeLoad", "(Ljava/lang/String;Ljava/lang/ClassLoader;Ljava/lang/String;)Ljava/lang/String;");
	}

	mirror::Class* WellKnownClasses::ToClass(jclass global_jclass) {
	return reinterpret_cast<mirror::Class*>(Thread::Current()->DecodeJObject(global_jclass));
	}

	} // namespace art