runtime/well_known_classes.cc

   1 /*
   2  * Copyright (C) 2012 The Android Open Source Project
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include "well_known_classes.h"
  18
  19 #include <stdlib.h>
  20
  21 #include <sstream>
  22
  23 #include "android-base/stringprintf.h"
  24
  25 #include "base/logging.h"
  26 #include "entrypoints/quick/quick_entrypoints_enum.h"
  27 #include "jni_internal.h"
  28 #include "mirror/class.h"
  29 #include "mirror/throwable.h"
  30 #include "obj_ptr-inl.h"
  31 #include "ScopedLocalRef.h"
  32 #include "scoped_thread_state_change-inl.h"
  33 #include "thread-inl.h"
  34
  35 namespace art {
  36
  37 jclass WellKnownClasses::dalvik_annotation_optimization_CriticalNative;
  38 jclass WellKnownClasses::dalvik_annotation_optimization_FastNative;
  39 jclass WellKnownClasses::dalvik_system_BaseDexClassLoader;
  40 jclass WellKnownClasses::dalvik_system_DexClassLoader;
  41 jclass WellKnownClasses::dalvik_system_DexFile;
  42 jclass WellKnownClasses::dalvik_system_DexPathList;
  43 jclass WellKnownClasses::dalvik_system_DexPathList__Element;
  44 jclass WellKnownClasses::dalvik_system_EmulatedStackFrame;
  45 jclass WellKnownClasses::dalvik_system_PathClassLoader;
  46 jclass WellKnownClasses::dalvik_system_VMRuntime;
  47 jclass WellKnownClasses::java_lang_annotation_Annotation__array;
  48 jclass WellKnownClasses::java_lang_BootClassLoader;
  49 jclass WellKnownClasses::java_lang_ClassLoader;
  50 jclass WellKnownClasses::java_lang_ClassNotFoundException;
  51 jclass WellKnownClasses::java_lang_Daemons;
  52 jclass WellKnownClasses::java_lang_Error;
  53 jclass WellKnownClasses::java_lang_invoke_MethodHandle;
  54 jclass WellKnownClasses::java_lang_IllegalAccessError;
  55 jclass WellKnownClasses::java_lang_NoClassDefFoundError;
  56 jclass WellKnownClasses::java_lang_Object;
  57 jclass WellKnownClasses::java_lang_OutOfMemoryError;
  58 jclass WellKnownClasses::java_lang_reflect_Constructor;
  59 jclass WellKnownClasses::java_lang_reflect_Executable;
  60 jclass WellKnownClasses::java_lang_reflect_Field;
  61 jclass WellKnownClasses::java_lang_reflect_Method;
  62 jclass WellKnownClasses::java_lang_reflect_Parameter;
  63 jclass WellKnownClasses::java_lang_reflect_Parameter__array;
  64 jclass WellKnownClasses::java_lang_reflect_Proxy;
  65 jclass WellKnownClasses::java_lang_RuntimeException;
  66 jclass WellKnownClasses::java_lang_StackOverflowError;
  67 jclass WellKnownClasses::java_lang_String;
  68 jclass WellKnownClasses::java_lang_StringFactory;
  69 jclass WellKnownClasses::java_lang_System;
  70 jclass WellKnownClasses::java_lang_Thread;
  71 jclass WellKnownClasses::java_lang_ThreadGroup;
  72 jclass WellKnownClasses::java_lang_Throwable;
  73 jclass WellKnownClasses::java_nio_DirectByteBuffer;
  74 jclass WellKnownClasses::java_util_ArrayList;
  75 jclass WellKnownClasses::java_util_Collections;
  76 jclass WellKnownClasses::libcore_reflect_AnnotationFactory;
  77 jclass WellKnownClasses::libcore_reflect_AnnotationMember;
  78 jclass WellKnownClasses::libcore_util_EmptyArray;
  79 jclass WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk;
  80 jclass WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer;
  81
  82 jmethodID WellKnownClasses::dalvik_system_VMRuntime_runFinalization;
  83 jmethodID WellKnownClasses::java_lang_Boolean_valueOf;
  84 jmethodID WellKnownClasses::java_lang_Byte_valueOf;
  85 jmethodID WellKnownClasses::java_lang_Character_valueOf;
  86 jmethodID WellKnownClasses::java_lang_ClassLoader_loadClass;
  87 jmethodID WellKnownClasses::java_lang_ClassNotFoundException_init;
  88 jmethodID WellKnownClasses::java_lang_Daemons_requestHeapTrim;
  89 jmethodID WellKnownClasses::java_lang_Daemons_start;
  90 jmethodID WellKnownClasses::java_lang_Daemons_stop;
  91 jmethodID WellKnownClasses::java_lang_Double_valueOf;
  92 jmethodID WellKnownClasses::java_lang_Float_valueOf;
  93 jmethodID WellKnownClasses::java_lang_Integer_valueOf;
  94 jmethodID WellKnownClasses::java_lang_invoke_MethodHandle_invoke;
  95 jmethodID WellKnownClasses::java_lang_invoke_MethodHandle_invokeExact;
  96 jmethodID WellKnownClasses::java_lang_Long_valueOf;
  97 jmethodID WellKnownClasses::java_lang_ref_FinalizerReference_add;
  98 jmethodID WellKnownClasses::java_lang_ref_ReferenceQueue_add;
  99 jmethodID WellKnownClasses::java_lang_reflect_Parameter_init;
 100 jmethodID WellKnownClasses::java_lang_reflect_Proxy_invoke;
 101 jmethodID WellKnownClasses::java_lang_Runtime_nativeLoad;
 102 jmethodID WellKnownClasses::java_lang_Short_valueOf;
 103 jmethodID WellKnownClasses::java_lang_String_charAt;
 104 jmethodID WellKnownClasses::java_lang_System_runFinalization = nullptr;
 105 jmethodID WellKnownClasses::java_lang_Thread_dispatchUncaughtException;
 106 jmethodID WellKnownClasses::java_lang_Thread_init;
 107 jmethodID WellKnownClasses::java_lang_Thread_run;
 108 jmethodID WellKnownClasses::java_lang_ThreadGroup_removeThread;
 109 jmethodID WellKnownClasses::java_nio_DirectByteBuffer_init;
 110 jmethodID WellKnownClasses::libcore_reflect_AnnotationFactory_createAnnotation;
 111 jmethodID WellKnownClasses::libcore_reflect_AnnotationMember_init;
 112 jmethodID WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer_broadcast;
 113 jmethodID WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer_dispatch;
 114
 115 jfieldID WellKnownClasses::dalvik_system_DexFile_cookie;
 116 jfieldID WellKnownClasses::dalvik_system_DexFile_fileName;
 117 jfieldID WellKnownClasses::dalvik_system_BaseDexClassLoader_pathList;
 118 jfieldID WellKnownClasses::dalvik_system_DexPathList_dexElements;
 119 jfieldID WellKnownClasses::dalvik_system_DexPathList__Element_dexFile;
 120 jfieldID WellKnownClasses::java_lang_Thread_daemon;
 121 jfieldID WellKnownClasses::java_lang_Thread_group;
 122 jfieldID WellKnownClasses::java_lang_Thread_lock;
 123 jfieldID WellKnownClasses::java_lang_Thread_name;
 124 jfieldID WellKnownClasses::java_lang_Thread_priority;
 125 jfieldID WellKnownClasses::java_lang_Thread_nativePeer;
 126 jfieldID WellKnownClasses::java_lang_ThreadGroup_groups;
 127 jfieldID WellKnownClasses::java_lang_ThreadGroup_ngroups;
 128 jfieldID WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup;
 129 jfieldID WellKnownClasses::java_lang_ThreadGroup_name;
 130 jfieldID WellKnownClasses::java_lang_ThreadGroup_parent;
 131 jfieldID WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup;
 132 jfieldID WellKnownClasses::java_lang_Throwable_cause;
 133 jfieldID WellKnownClasses::java_lang_Throwable_detailMessage;
 134 jfieldID WellKnownClasses::java_lang_Throwable_stackTrace;
 135 jfieldID WellKnownClasses::java_lang_Throwable_stackState;
 136 jfieldID WellKnownClasses::java_lang_Throwable_suppressedExceptions;
 137 jfieldID WellKnownClasses::java_lang_reflect_Executable_artMethod;
 138 jfieldID WellKnownClasses::java_lang_reflect_Proxy_h;
 139 jfieldID WellKnownClasses::java_nio_DirectByteBuffer_capacity;
 140 jfieldID WellKnownClasses::java_nio_DirectByteBuffer_effectiveDirectAddress;
 141 jfieldID WellKnownClasses::java_util_ArrayList_array;
 142 jfieldID WellKnownClasses::java_util_ArrayList_size;
 143 jfieldID WellKnownClasses::java_util_Collections_EMPTY_LIST;
 144 jfieldID WellKnownClasses::libcore_util_EmptyArray_STACK_TRACE_ELEMENT;
 145 jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_data;
 146 jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_length;
 147 jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_offset;
 148 jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_type;
 149
 150 static jclass CacheClass(JNIEnv* env, const char* jni_class_name) {
 151   ScopedLocalRef<jclass> c(env, env->FindClass(jni_class_name));
 152   if (c.get() == nullptr) {
 153     LOG(FATAL) << "Couldn't find class: " << jni_class_name;
 154   }
 155   return reinterpret_cast<jclass>(env->NewGlobalRef(c.get()));
 156 }
 157
 158 static jfieldID CacheField(JNIEnv* env, jclass c, bool is_static,
 159                            const char* name, const char* signature) {
 160   jfieldID fid = is_static ? env->GetStaticFieldID(c, name, signature) :
 161       env->GetFieldID(c, name, signature);
 162   if (fid == nullptr) {
 163     ScopedObjectAccess soa(env);
 164     if (soa.Self()->IsExceptionPending()) {
 165       LOG(FATAL_WITHOUT_ABORT) << soa.Self()->GetException()->Dump();
 166     }
 167     std::ostringstream os;
 168     WellKnownClasses::ToClass(c)->DumpClass(os, mirror::Class::kDumpClassFullDetail);
 169     LOG(FATAL) << "Couldn't find field \"" << name << "\" with signature \"" << signature << "\": "
 170                << os.str();
 171   }
 172   return fid;
 173 }
 174
 175 jmethodID CacheMethod(JNIEnv* env, jclass c, bool is_static,
 176                       const char* name, const char* signature) {
 177   jmethodID mid = is_static ? env->GetStaticMethodID(c, name, signature) :
 178       env->GetMethodID(c, name, signature);
 179   if (mid == nullptr) {
 180     ScopedObjectAccess soa(env);
 181     if (soa.Self()->IsExceptionPending()) {
 182       LOG(FATAL_WITHOUT_ABORT) << soa.Self()->GetException()->Dump();
 183     }
 184     std::ostringstream os;
 185     WellKnownClasses::ToClass(c)->DumpClass(os, mirror::Class::kDumpClassFullDetail);
 186     LOG(FATAL) << "Couldn't find method \"" << name << "\" with signature \"" << signature << "\": "
 187                << os.str();
 188   }
 189   return mid;
 190 }
 191
 192 static jmethodID CachePrimitiveBoxingMethod(JNIEnv* env, char prim_name, const char* boxed_name) {
 193   ScopedLocalRef<jclass> boxed_class(env, env->FindClass(boxed_name));
 194   return CacheMethod(env, boxed_class.get(), true, "valueOf",
 195                      android::base::StringPrintf("(%c)L%s;", prim_name, boxed_name).c_str());
 196 }
 197
 198 #define STRING_INIT_LIST(V) \
 199   V(java_lang_String_init, "()V", newEmptyString, "newEmptyString", "()Ljava/lang/String;", NewEmptyString) \
 200   V(java_lang_String_init_B, "([B)V", newStringFromBytes_B, "newStringFromBytes", "([B)Ljava/lang/String;", NewStringFromBytes_B) \
 201   V(java_lang_String_init_BI, "([BI)V", newStringFromBytes_BI, "newStringFromBytes", "([BI)Ljava/lang/String;", NewStringFromBytes_BI) \
 202   V(java_lang_String_init_BII, "([BII)V", newStringFromBytes_BII, "newStringFromBytes", "([BII)Ljava/lang/String;", NewStringFromBytes_BII) \
 203   V(java_lang_String_init_BIII, "([BIII)V", newStringFromBytes_BIII, "newStringFromBytes", "([BIII)Ljava/lang/String;", NewStringFromBytes_BIII) \
 204   V(java_lang_String_init_BIIString, "([BIILjava/lang/String;)V", newStringFromBytes_BIIString, "newStringFromBytes", "([BIILjava/lang/String;)Ljava/lang/String;", NewStringFromBytes_BIIString) \
 205   V(java_lang_String_init_BString, "([BLjava/lang/String;)V", newStringFromBytes_BString, "newStringFromBytes", "([BLjava/lang/String;)Ljava/lang/String;", NewStringFromBytes_BString) \
 206   V(java_lang_String_init_BIICharset, "([BIILjava/nio/charset/Charset;)V", newStringFromBytes_BIICharset, "newStringFromBytes", "([BIILjava/nio/charset/Charset;)Ljava/lang/String;", NewStringFromBytes_BIICharset) \
 207   V(java_lang_String_init_BCharset, "([BLjava/nio/charset/Charset;)V", newStringFromBytes_BCharset, "newStringFromBytes", "([BLjava/nio/charset/Charset;)Ljava/lang/String;", NewStringFromBytes_BCharset) \
 208   V(java_lang_String_init_C, "([C)V", newStringFromChars_C, "newStringFromChars", "([C)Ljava/lang/String;", NewStringFromChars_C) \
 209   V(java_lang_String_init_CII, "([CII)V", newStringFromChars_CII, "newStringFromChars", "([CII)Ljava/lang/String;", NewStringFromChars_CII) \
 210   V(java_lang_String_init_IIC, "(II[C)V", newStringFromChars_IIC, "newStringFromChars", "(II[C)Ljava/lang/String;", NewStringFromChars_IIC) \
 211   V(java_lang_String_init_String, "(Ljava/lang/String;)V", newStringFromString, "newStringFromString", "(Ljava/lang/String;)Ljava/lang/String;", NewStringFromString) \
 212   V(java_lang_String_init_StringBuffer, "(Ljava/lang/StringBuffer;)V", newStringFromStringBuffer, "newStringFromStringBuffer", "(Ljava/lang/StringBuffer;)Ljava/lang/String;", NewStringFromStringBuffer) \
 213   V(java_lang_String_init_III, "([III)V", newStringFromCodePoints, "newStringFromCodePoints", "([III)Ljava/lang/String;", NewStringFromCodePoints) \
 214   V(java_lang_String_init_StringBuilder, "(Ljava/lang/StringBuilder;)V", newStringFromStringBuilder, "newStringFromStringBuilder", "(Ljava/lang/StringBuilder;)Ljava/lang/String;", NewStringFromStringBuilder) \
 215
 216 #define STATIC_STRING_INIT(init_runtime_name, init_signature, new_runtime_name, ...) \
 217     static ArtMethod* init_runtime_name; \
 218     static ArtMethod* new_runtime_name;
 219     STRING_INIT_LIST(STATIC_STRING_INIT)
 220 #undef STATIC_STRING_INIT
 221
 222 void WellKnownClasses::InitStringInit(JNIEnv* env) {
 223   ScopedObjectAccess soa(Thread::Current());
 224   #define LOAD_STRING_INIT(init_runtime_name, init_signature, new_runtime_name,             \
 225                            new_java_name, new_signature, ...)                               \
 226       init_runtime_name = jni::DecodeArtMethod(                                             \
 227           CacheMethod(env, java_lang_String, false, "<init>", init_signature));             \
 228       new_runtime_name = jni::DecodeArtMethod(                                              \
 229           CacheMethod(env, java_lang_StringFactory, true, new_java_name, new_signature));
 230       STRING_INIT_LIST(LOAD_STRING_INIT)
 231   #undef LOAD_STRING_INIT
 232 }
 233
 234 void Thread::InitStringEntryPoints() {
 235   QuickEntryPoints* qpoints = &tlsPtr_.quick_entrypoints;
 236   #define SET_ENTRY_POINT(init_runtime_name, init_signature, new_runtime_name,              \
 237                           new_java_name, new_signature, entry_point_name)                   \
 238       qpoints->p ## entry_point_name = reinterpret_cast<void(*)()>(new_runtime_name);
 239       STRING_INIT_LIST(SET_ENTRY_POINT)
 240   #undef SET_ENTRY_POINT
 241 }
 242
 243 ArtMethod* WellKnownClasses::StringInitToStringFactory(ArtMethod* string_init) {
 244   #define TO_STRING_FACTORY(init_runtime_name, init_signature, new_runtime_name,            \
 245                             new_java_name, new_signature, entry_point_name)                 \
 246       if (string_init == (init_runtime_name)) {                                             \
 247         return (new_runtime_name);                                                          \
 248       }
 249       STRING_INIT_LIST(TO_STRING_FACTORY)
 250   #undef TO_STRING_FACTORY
 251   LOG(FATAL) << "Could not find StringFactory method for String.<init>";
 252   return nullptr;
 253 }
 254
 255 uint32_t WellKnownClasses::StringInitToEntryPoint(ArtMethod* string_init) {
 256   #define TO_ENTRY_POINT(init_runtime_name, init_signature, new_runtime_name,               \
 257                          new_java_name, new_signature, entry_point_name)                    \
 258       if (string_init == (init_runtime_name)) {                                             \
 259         return kQuick ## entry_point_name;                                                  \
 260       }
 261       STRING_INIT_LIST(TO_ENTRY_POINT)
 262   #undef TO_STRING_FACTORY
 263   LOG(FATAL) << "Could not find StringFactory method for String.<init>";
 264   return 0;
 265 }
 266 #undef STRING_INIT_LIST
 267
 268 void WellKnownClasses::Init(JNIEnv* env) {
 269   dalvik_annotation_optimization_CriticalNative =
 270       CacheClass(env, "dalvik/annotation/optimization/CriticalNative");
 271   dalvik_annotation_optimization_FastNative = CacheClass(env, "dalvik/annotation/optimization/FastNative");
 272   dalvik_system_BaseDexClassLoader = CacheClass(env, "dalvik/system/BaseDexClassLoader");
 273   dalvik_system_DexClassLoader = CacheClass(env, "dalvik/system/DexClassLoader");
 274   dalvik_system_DexFile = CacheClass(env, "dalvik/system/DexFile");
 275   dalvik_system_DexPathList = CacheClass(env, "dalvik/system/DexPathList");
 276   dalvik_system_DexPathList__Element = CacheClass(env, "dalvik/system/DexPathList$Element");
 277   dalvik_system_EmulatedStackFrame = CacheClass(env, "dalvik/system/EmulatedStackFrame");
 278   dalvik_system_PathClassLoader = CacheClass(env, "dalvik/system/PathClassLoader");
 279   dalvik_system_VMRuntime = CacheClass(env, "dalvik/system/VMRuntime");
 280
 281   java_lang_annotation_Annotation__array = CacheClass(env, "[Ljava/lang/annotation/Annotation;");
 282   java_lang_BootClassLoader = CacheClass(env, "java/lang/BootClassLoader");
 283   java_lang_ClassLoader = CacheClass(env, "java/lang/ClassLoader");
 284   java_lang_ClassNotFoundException = CacheClass(env, "java/lang/ClassNotFoundException");
 285   java_lang_Daemons = CacheClass(env, "java/lang/Daemons");
 286   java_lang_Object = CacheClass(env, "java/lang/Object");
 287   java_lang_OutOfMemoryError = CacheClass(env, "java/lang/OutOfMemoryError");
 288   java_lang_Error = CacheClass(env, "java/lang/Error");
 289   java_lang_IllegalAccessError = CacheClass(env, "java/lang/IllegalAccessError");
 290   java_lang_invoke_MethodHandle = CacheClass(env, "java/lang/invoke/MethodHandle");
 291   java_lang_NoClassDefFoundError = CacheClass(env, "java/lang/NoClassDefFoundError");
 292   java_lang_reflect_Constructor = CacheClass(env, "java/lang/reflect/Constructor");
 293   java_lang_reflect_Executable = CacheClass(env, "java/lang/reflect/Executable");
 294   java_lang_reflect_Field = CacheClass(env, "java/lang/reflect/Field");
 295   java_lang_reflect_Method = CacheClass(env, "java/lang/reflect/Method");
 296   java_lang_reflect_Parameter = CacheClass(env, "java/lang/reflect/Parameter");
 297   java_lang_reflect_Parameter__array = CacheClass(env, "[Ljava/lang/reflect/Parameter;");
 298   java_lang_reflect_Proxy = CacheClass(env, "java/lang/reflect/Proxy");
 299   java_lang_RuntimeException = CacheClass(env, "java/lang/RuntimeException");
 300   java_lang_StackOverflowError = CacheClass(env, "java/lang/StackOverflowError");
 301   java_lang_String = CacheClass(env, "java/lang/String");
 302   java_lang_StringFactory = CacheClass(env, "java/lang/StringFactory");
 303   java_lang_System = CacheClass(env, "java/lang/System");
 304   java_lang_Thread = CacheClass(env, "java/lang/Thread");
 305   java_lang_ThreadGroup = CacheClass(env, "java/lang/ThreadGroup");
 306   java_lang_Throwable = CacheClass(env, "java/lang/Throwable");
 307   java_nio_DirectByteBuffer = CacheClass(env, "java/nio/DirectByteBuffer");
 308   java_util_ArrayList = CacheClass(env, "java/util/ArrayList");
 309   java_util_Collections = CacheClass(env, "java/util/Collections");
 310   libcore_reflect_AnnotationFactory = CacheClass(env, "libcore/reflect/AnnotationFactory");
 311   libcore_reflect_AnnotationMember = CacheClass(env, "libcore/reflect/AnnotationMember");
 312   libcore_util_EmptyArray = CacheClass(env, "libcore/util/EmptyArray");
 313   org_apache_harmony_dalvik_ddmc_Chunk = CacheClass(env, "org/apache/harmony/dalvik/ddmc/Chunk");
 314   org_apache_harmony_dalvik_ddmc_DdmServer = CacheClass(env, "org/apache/harmony/dalvik/ddmc/DdmServer");
 315
 316   dalvik_system_VMRuntime_runFinalization = CacheMethod(env, dalvik_system_VMRuntime, true, "runFinalization", "(J)V");
 317   java_lang_ClassNotFoundException_init = CacheMethod(env, java_lang_ClassNotFoundException, false, "<init>", "(Ljava/lang/String;Ljava/lang/Throwable;)V");
 318   java_lang_ClassLoader_loadClass = CacheMethod(env, java_lang_ClassLoader, false, "loadClass", "(Ljava/lang/String;)Ljava/lang/Class;");
 319
 320   java_lang_Daemons_requestHeapTrim = CacheMethod(env, java_lang_Daemons, true, "requestHeapTrim", "()V");
 321   java_lang_Daemons_start = CacheMethod(env, java_lang_Daemons, true, "start", "()V");
 322   java_lang_Daemons_stop = CacheMethod(env, java_lang_Daemons, true, "stop", "()V");
 323   java_lang_invoke_MethodHandle_invoke =
 324       CacheMethod(env, java_lang_invoke_MethodHandle, false,
 325                   "invoke", "([Ljava/lang/Object;)Ljava/lang/Object;");
 326   java_lang_invoke_MethodHandle_invokeExact =
 327       CacheMethod(env, java_lang_invoke_MethodHandle, false,
 328                   "invokeExact", "([Ljava/lang/Object;)Ljava/lang/Object;");
 329   ScopedLocalRef<jclass> java_lang_ref_FinalizerReference(env, env->FindClass("java/lang/ref/FinalizerReference"));
 330   java_lang_ref_FinalizerReference_add = CacheMethod(env, java_lang_ref_FinalizerReference.get(), true, "add", "(Ljava/lang/Object;)V");
 331   ScopedLocalRef<jclass> java_lang_ref_ReferenceQueue(env, env->FindClass("java/lang/ref/ReferenceQueue"));
 332   java_lang_ref_ReferenceQueue_add = CacheMethod(env, java_lang_ref_ReferenceQueue.get(), true, "add", "(Ljava/lang/ref/Reference;)V");
 333
 334   java_lang_reflect_Parameter_init = CacheMethod(env, java_lang_reflect_Parameter, false, "<init>", "(Ljava/lang/String;ILjava/lang/reflect/Executable;I)V");
 335   java_lang_String_charAt = CacheMethod(env, java_lang_String, false, "charAt", "(I)C");
 336   java_lang_Thread_dispatchUncaughtException = CacheMethod(env, java_lang_Thread, false, "dispatchUncaughtException", "(Ljava/lang/Throwable;)V");
 337   java_lang_Thread_init = CacheMethod(env, java_lang_Thread, false, "<init>", "(Ljava/lang/ThreadGroup;Ljava/lang/String;IZ)V");
 338   java_lang_Thread_run = CacheMethod(env, java_lang_Thread, false, "run", "()V");
 339   java_lang_ThreadGroup_removeThread = CacheMethod(env, java_lang_ThreadGroup, false, "threadTerminated", "(Ljava/lang/Thread;)V");
 340   java_nio_DirectByteBuffer_init = CacheMethod(env, java_nio_DirectByteBuffer, false, "<init>", "(JI)V");
 341   libcore_reflect_AnnotationFactory_createAnnotation = CacheMethod(env, libcore_reflect_AnnotationFactory, true, "createAnnotation", "(Ljava/lang/Class;[Llibcore/reflect/AnnotationMember;)Ljava/lang/annotation/Annotation;");
 342   libcore_reflect_AnnotationMember_init = CacheMethod(env, libcore_reflect_AnnotationMember, false, "<init>", "(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Class;Ljava/lang/reflect/Method;)V");
 343   org_apache_harmony_dalvik_ddmc_DdmServer_broadcast = CacheMethod(env, org_apache_harmony_dalvik_ddmc_DdmServer, true, "broadcast", "(I)V");
 344   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;");
 345
 346   dalvik_system_BaseDexClassLoader_pathList = CacheField(env, dalvik_system_BaseDexClassLoader, false, "pathList", "Ldalvik/system/DexPathList;");
 347   dalvik_system_DexFile_cookie = CacheField(env, dalvik_system_DexFile, false, "mCookie", "Ljava/lang/Object;");
 348   dalvik_system_DexFile_fileName = CacheField(env, dalvik_system_DexFile, false, "mFileName", "Ljava/lang/String;");
 349   dalvik_system_DexPathList_dexElements = CacheField(env, dalvik_system_DexPathList, false, "dexElements", "[Ldalvik/system/DexPathList$Element;");
 350   dalvik_system_DexPathList__Element_dexFile = CacheField(env, dalvik_system_DexPathList__Element, false, "dexFile", "Ldalvik/system/DexFile;");
 351   java_lang_Thread_daemon = CacheField(env, java_lang_Thread, false, "daemon", "Z");
 352   java_lang_Thread_group = CacheField(env, java_lang_Thread, false, "group", "Ljava/lang/ThreadGroup;");
 353   java_lang_Thread_lock = CacheField(env, java_lang_Thread, false, "lock", "Ljava/lang/Object;");
 354   java_lang_Thread_name = CacheField(env, java_lang_Thread, false, "name", "Ljava/lang/String;");
 355   java_lang_Thread_priority = CacheField(env, java_lang_Thread, false, "priority", "I");
 356   java_lang_Thread_nativePeer = CacheField(env, java_lang_Thread, false, "nativePeer", "J");
 357   java_lang_ThreadGroup_groups = CacheField(env, java_lang_ThreadGroup, false, "groups", "[Ljava/lang/ThreadGroup;");
 358   java_lang_ThreadGroup_ngroups = CacheField(env, java_lang_ThreadGroup, false, "ngroups", "I");
 359   java_lang_ThreadGroup_mainThreadGroup = CacheField(env, java_lang_ThreadGroup, true, "mainThreadGroup", "Ljava/lang/ThreadGroup;");
 360   java_lang_ThreadGroup_name = CacheField(env, java_lang_ThreadGroup, false, "name", "Ljava/lang/String;");
 361   java_lang_ThreadGroup_parent = CacheField(env, java_lang_ThreadGroup, false, "parent", "Ljava/lang/ThreadGroup;");
 362   java_lang_ThreadGroup_systemThreadGroup = CacheField(env, java_lang_ThreadGroup, true, "systemThreadGroup", "Ljava/lang/ThreadGroup;");
 363   java_lang_Throwable_cause = CacheField(env, java_lang_Throwable, false, "cause", "Ljava/lang/Throwable;");
 364   java_lang_Throwable_detailMessage = CacheField(env, java_lang_Throwable, false, "detailMessage", "Ljava/lang/String;");
 365   java_lang_Throwable_stackTrace = CacheField(env, java_lang_Throwable, false, "stackTrace", "[Ljava/lang/StackTraceElement;");
 366   java_lang_Throwable_stackState = CacheField(env, java_lang_Throwable, false, "backtrace", "Ljava/lang/Object;");
 367   java_lang_Throwable_suppressedExceptions = CacheField(env, java_lang_Throwable, false, "suppressedExceptions", "Ljava/util/List;");
 368   java_lang_reflect_Executable_artMethod = CacheField(env, java_lang_reflect_Executable, false, "artMethod", "J");
 369   java_nio_DirectByteBuffer_capacity = CacheField(env, java_nio_DirectByteBuffer, false, "capacity", "I");
 370   java_nio_DirectByteBuffer_effectiveDirectAddress = CacheField(env, java_nio_DirectByteBuffer, false, "address", "J");
 371   java_util_ArrayList_array = CacheField(env, java_util_ArrayList, false, "elementData", "[Ljava/lang/Object;");
 372   java_util_ArrayList_size = CacheField(env, java_util_ArrayList, false, "size", "I");
 373   java_util_Collections_EMPTY_LIST = CacheField(env, java_util_Collections, true, "EMPTY_LIST", "Ljava/util/List;");
 374   libcore_util_EmptyArray_STACK_TRACE_ELEMENT = CacheField(env, libcore_util_EmptyArray, true, "STACK_TRACE_ELEMENT", "[Ljava/lang/StackTraceElement;");
 375   org_apache_harmony_dalvik_ddmc_Chunk_data = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "data", "[B");
 376   org_apache_harmony_dalvik_ddmc_Chunk_length = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "length", "I");
 377   org_apache_harmony_dalvik_ddmc_Chunk_offset = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "offset", "I");
 378   org_apache_harmony_dalvik_ddmc_Chunk_type = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "type", "I");
 379
 380   java_lang_Boolean_valueOf = CachePrimitiveBoxingMethod(env, 'Z', "java/lang/Boolean");
 381   java_lang_Byte_valueOf = CachePrimitiveBoxingMethod(env, 'B', "java/lang/Byte");
 382   java_lang_Character_valueOf = CachePrimitiveBoxingMethod(env, 'C', "java/lang/Character");
 383   java_lang_Double_valueOf = CachePrimitiveBoxingMethod(env, 'D', "java/lang/Double");
 384   java_lang_Float_valueOf = CachePrimitiveBoxingMethod(env, 'F', "java/lang/Float");
 385   java_lang_Integer_valueOf = CachePrimitiveBoxingMethod(env, 'I', "java/lang/Integer");
 386   java_lang_Long_valueOf = CachePrimitiveBoxingMethod(env, 'J', "java/lang/Long");
 387   java_lang_Short_valueOf = CachePrimitiveBoxingMethod(env, 'S', "java/lang/Short");
 388
 389   InitStringInit(env);
 390   Thread::Current()->InitStringEntryPoints();
 391 }
 392
 393 void WellKnownClasses::LateInit(JNIEnv* env) {
 394   ScopedLocalRef<jclass> java_lang_Runtime(env, env->FindClass("java/lang/Runtime"));
 395   // CacheField and CacheMethod will initialize their classes. Classes below
 396   // have clinit sections that call JNI methods. Late init is required
 397   // to make sure these JNI methods are available.
 398   java_lang_Runtime_nativeLoad =
 399       CacheMethod(env, java_lang_Runtime.get(), true, "nativeLoad",
 400                   "(Ljava/lang/String;Ljava/lang/ClassLoader;Ljava/lang/String;)"
 401                       "Ljava/lang/String;");
 402   java_lang_reflect_Proxy_invoke =
 403     CacheMethod(env, java_lang_reflect_Proxy, true, "invoke",
 404                 "(Ljava/lang/reflect/Proxy;Ljava/lang/reflect/Method;"
 405                     "[Ljava/lang/Object;)Ljava/lang/Object;");
 406   java_lang_reflect_Proxy_h =
 407     CacheField(env, java_lang_reflect_Proxy, false, "h",
 408                "Ljava/lang/reflect/InvocationHandler;");
 409 }
 410
 411 ObjPtr<mirror::Class> WellKnownClasses::ToClass(jclass global_jclass) {
 412   auto ret = ObjPtr<mirror::Class>::DownCast(Thread::Current()->DecodeJObject(global_jclass));
 413   DCHECK(!ret.IsNull());
 414   return ret;
 415 }
 416
 417 }  // namespace art