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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 "base/logging.h"
22 #include "mirror/class.h"
23 #include "ScopedLocalRef.h"
24 #include "thread.h"
25 
26 namespace art {
27 
28 jclass WellKnownClasses::com_android_dex_Dex;
29 jclass WellKnownClasses::dalvik_system_PathClassLoader;
30 jclass WellKnownClasses::java_lang_ClassLoader;
31 jclass WellKnownClasses::java_lang_ClassNotFoundException;
32 jclass WellKnownClasses::java_lang_Daemons;
33 jclass WellKnownClasses::java_lang_Error;
34 jclass WellKnownClasses::java_lang_Object;
35 jclass WellKnownClasses::java_lang_reflect_AbstractMethod;
36 jclass WellKnownClasses::java_lang_reflect_ArtMethod;
37 jclass WellKnownClasses::java_lang_reflect_Constructor;
38 jclass WellKnownClasses::java_lang_reflect_Field;
39 jclass WellKnownClasses::java_lang_reflect_Method;
40 jclass WellKnownClasses::java_lang_reflect_Proxy;
41 jclass WellKnownClasses::java_lang_RuntimeException;
42 jclass WellKnownClasses::java_lang_StackOverflowError;
43 jclass WellKnownClasses::java_lang_System;
44 jclass WellKnownClasses::java_lang_Thread;
45 jclass WellKnownClasses::java_lang_Thread$UncaughtExceptionHandler;
46 jclass WellKnownClasses::java_lang_ThreadGroup;
47 jclass WellKnownClasses::java_lang_Throwable;
48 jclass WellKnownClasses::java_nio_DirectByteBuffer;
49 jclass WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk;
50 jclass WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer;
51 
52 jmethodID WellKnownClasses::com_android_dex_Dex_create;
53 jmethodID WellKnownClasses::java_lang_Boolean_valueOf;
54 jmethodID WellKnownClasses::java_lang_Byte_valueOf;
55 jmethodID WellKnownClasses::java_lang_Character_valueOf;
56 jmethodID WellKnownClasses::java_lang_ClassLoader_loadClass;
57 jmethodID WellKnownClasses::java_lang_ClassNotFoundException_init;
58 jmethodID WellKnownClasses::java_lang_Daemons_requestGC;
59 jmethodID WellKnownClasses::java_lang_Daemons_requestHeapTrim;
60 jmethodID WellKnownClasses::java_lang_Daemons_start;
61 jmethodID WellKnownClasses::java_lang_Double_valueOf;
62 jmethodID WellKnownClasses::java_lang_Float_valueOf;
63 jmethodID WellKnownClasses::java_lang_Integer_valueOf;
64 jmethodID WellKnownClasses::java_lang_Long_valueOf;
65 jmethodID WellKnownClasses::java_lang_ref_FinalizerReference_add;
66 jmethodID WellKnownClasses::java_lang_ref_ReferenceQueue_add;
67 jmethodID WellKnownClasses::java_lang_reflect_Proxy_invoke;
68 jmethodID WellKnownClasses::java_lang_Runtime_nativeLoad;
69 jmethodID WellKnownClasses::java_lang_Short_valueOf;
70 jmethodID WellKnownClasses::java_lang_System_runFinalization = NULL;
71 jmethodID WellKnownClasses::java_lang_Thread_init;
72 jmethodID WellKnownClasses::java_lang_Thread_run;
73 jmethodID WellKnownClasses::java_lang_Thread$UncaughtExceptionHandler_uncaughtException;
74 jmethodID WellKnownClasses::java_lang_ThreadGroup_removeThread;
75 jmethodID WellKnownClasses::java_nio_DirectByteBuffer_init;
76 jmethodID WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer_broadcast;
77 jmethodID WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer_dispatch;
78 
79 jfieldID WellKnownClasses::java_lang_Thread_daemon;
80 jfieldID WellKnownClasses::java_lang_Thread_group;
81 jfieldID WellKnownClasses::java_lang_Thread_lock;
82 jfieldID WellKnownClasses::java_lang_Thread_name;
83 jfieldID WellKnownClasses::java_lang_Thread_priority;
84 jfieldID WellKnownClasses::java_lang_Thread_uncaughtHandler;
85 jfieldID WellKnownClasses::java_lang_Thread_nativePeer;
86 jfieldID WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup;
87 jfieldID WellKnownClasses::java_lang_ThreadGroup_name;
88 jfieldID WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup;
89 jfieldID WellKnownClasses::java_lang_reflect_AbstractMethod_artMethod;
90 jfieldID WellKnownClasses::java_lang_reflect_Field_artField;
91 jfieldID WellKnownClasses::java_lang_reflect_Proxy_h;
92 jfieldID WellKnownClasses::java_nio_DirectByteBuffer_capacity;
93 jfieldID WellKnownClasses::java_nio_DirectByteBuffer_effectiveDirectAddress;
94 jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_data;
95 jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_length;
96 jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_offset;
97 jfieldID WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_type;
98 
CacheClass(JNIEnv * env,const char * jni_class_name)99 static jclass CacheClass(JNIEnv* env, const char* jni_class_name) {
100   ScopedLocalRef<jclass> c(env, env->FindClass(jni_class_name));
101   if (c.get() == NULL) {
102     LOG(FATAL) << "Couldn't find class: " << jni_class_name;
103   }
104   return reinterpret_cast<jclass>(env->NewGlobalRef(c.get()));
105 }
106 
CacheField(JNIEnv * env,jclass c,bool is_static,const char * name,const char * signature)107 static jfieldID CacheField(JNIEnv* env, jclass c, bool is_static, const char* name, const char* signature) {
108   jfieldID fid = is_static ? env->GetStaticFieldID(c, name, signature) : env->GetFieldID(c, name, signature);
109   if (fid == NULL) {
110     LOG(FATAL) << "Couldn't find field \"" << name << "\" with signature \"" << signature << "\"";
111   }
112   return fid;
113 }
114 
CacheMethod(JNIEnv * env,jclass c,bool is_static,const char * name,const char * signature)115 jmethodID CacheMethod(JNIEnv* env, jclass c, bool is_static, const char* name, const char* signature) {
116   jmethodID mid = is_static ? env->GetStaticMethodID(c, name, signature) : env->GetMethodID(c, name, signature);
117   if (mid == NULL) {
118     LOG(FATAL) << "Couldn't find method \"" << name << "\" with signature \"" << signature << "\"";
119   }
120   return mid;
121 }
122 
CachePrimitiveBoxingMethod(JNIEnv * env,char prim_name,const char * boxed_name)123 static jmethodID CachePrimitiveBoxingMethod(JNIEnv* env, char prim_name, const char* boxed_name) {
124   ScopedLocalRef<jclass> boxed_class(env, env->FindClass(boxed_name));
125   return CacheMethod(env, boxed_class.get(), true, "valueOf",
126                      StringPrintf("(%c)L%s;", prim_name, boxed_name).c_str());
127 }
128 
Init(JNIEnv * env)129 void WellKnownClasses::Init(JNIEnv* env) {
130   com_android_dex_Dex = CacheClass(env, "com/android/dex/Dex");
131   dalvik_system_PathClassLoader = CacheClass(env, "dalvik/system/PathClassLoader");
132   java_lang_ClassLoader = CacheClass(env, "java/lang/ClassLoader");
133   java_lang_ClassNotFoundException = CacheClass(env, "java/lang/ClassNotFoundException");
134   java_lang_Daemons = CacheClass(env, "java/lang/Daemons");
135   java_lang_Object = CacheClass(env, "java/lang/Object");
136   java_lang_Error = CacheClass(env, "java/lang/Error");
137   java_lang_reflect_AbstractMethod = CacheClass(env, "java/lang/reflect/AbstractMethod");
138   java_lang_reflect_ArtMethod = CacheClass(env, "java/lang/reflect/ArtMethod");
139   java_lang_reflect_Constructor = CacheClass(env, "java/lang/reflect/Constructor");
140   java_lang_reflect_Field = CacheClass(env, "java/lang/reflect/Field");
141   java_lang_reflect_Method = CacheClass(env, "java/lang/reflect/Method");
142   java_lang_reflect_Proxy = CacheClass(env, "java/lang/reflect/Proxy");
143   java_lang_RuntimeException = CacheClass(env, "java/lang/RuntimeException");
144   java_lang_StackOverflowError = CacheClass(env, "java/lang/StackOverflowError");
145   java_lang_System = CacheClass(env, "java/lang/System");
146   java_lang_Thread = CacheClass(env, "java/lang/Thread");
147   java_lang_Thread$UncaughtExceptionHandler = CacheClass(env, "java/lang/Thread$UncaughtExceptionHandler");
148   java_lang_ThreadGroup = CacheClass(env, "java/lang/ThreadGroup");
149   java_lang_Throwable = CacheClass(env, "java/lang/Throwable");
150   java_nio_DirectByteBuffer = CacheClass(env, "java/nio/DirectByteBuffer");
151   org_apache_harmony_dalvik_ddmc_Chunk = CacheClass(env, "org/apache/harmony/dalvik/ddmc/Chunk");
152   org_apache_harmony_dalvik_ddmc_DdmServer = CacheClass(env, "org/apache/harmony/dalvik/ddmc/DdmServer");
153 
154   com_android_dex_Dex_create = CacheMethod(env, com_android_dex_Dex, true, "create", "(Ljava/nio/ByteBuffer;)Lcom/android/dex/Dex;");
155   java_lang_ClassNotFoundException_init = CacheMethod(env, java_lang_ClassNotFoundException, false, "<init>", "(Ljava/lang/String;Ljava/lang/Throwable;)V");
156   java_lang_ClassLoader_loadClass = CacheMethod(env, java_lang_ClassLoader, false, "loadClass", "(Ljava/lang/String;)Ljava/lang/Class;");
157 
158   java_lang_Daemons_requestGC = CacheMethod(env, java_lang_Daemons, true, "requestGC", "()V");
159   java_lang_Daemons_requestHeapTrim = CacheMethod(env, java_lang_Daemons, true, "requestHeapTrim", "()V");
160   java_lang_Daemons_start = CacheMethod(env, java_lang_Daemons, true, "start", "()V");
161 
162   ScopedLocalRef<jclass> java_lang_ref_FinalizerReference(env, env->FindClass("java/lang/ref/FinalizerReference"));
163   java_lang_ref_FinalizerReference_add = CacheMethod(env, java_lang_ref_FinalizerReference.get(), true, "add", "(Ljava/lang/Object;)V");
164   ScopedLocalRef<jclass> java_lang_ref_ReferenceQueue(env, env->FindClass("java/lang/ref/ReferenceQueue"));
165   java_lang_ref_ReferenceQueue_add = CacheMethod(env, java_lang_ref_ReferenceQueue.get(), true, "add", "(Ljava/lang/ref/Reference;)V");
166 
167   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;");
168   java_lang_Thread_init = CacheMethod(env, java_lang_Thread, false, "<init>", "(Ljava/lang/ThreadGroup;Ljava/lang/String;IZ)V");
169   java_lang_Thread_run = CacheMethod(env, java_lang_Thread, false, "run", "()V");
170   java_lang_Thread$UncaughtExceptionHandler_uncaughtException = CacheMethod(env, java_lang_Thread$UncaughtExceptionHandler, false, "uncaughtException", "(Ljava/lang/Thread;Ljava/lang/Throwable;)V");
171   java_lang_ThreadGroup_removeThread = CacheMethod(env, java_lang_ThreadGroup, false, "removeThread", "(Ljava/lang/Thread;)V");
172   java_nio_DirectByteBuffer_init = CacheMethod(env, java_nio_DirectByteBuffer, false, "<init>", "(JI)V");
173   org_apache_harmony_dalvik_ddmc_DdmServer_broadcast = CacheMethod(env, org_apache_harmony_dalvik_ddmc_DdmServer, true, "broadcast", "(I)V");
174   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;");
175 
176   java_lang_Thread_daemon = CacheField(env, java_lang_Thread, false, "daemon", "Z");
177   java_lang_Thread_group = CacheField(env, java_lang_Thread, false, "group", "Ljava/lang/ThreadGroup;");
178   java_lang_Thread_lock = CacheField(env, java_lang_Thread, false, "lock", "Ljava/lang/Object;");
179   java_lang_Thread_name = CacheField(env, java_lang_Thread, false, "name", "Ljava/lang/String;");
180   java_lang_Thread_priority = CacheField(env, java_lang_Thread, false, "priority", "I");
181   java_lang_Thread_uncaughtHandler = CacheField(env, java_lang_Thread, false, "uncaughtHandler", "Ljava/lang/Thread$UncaughtExceptionHandler;");
182   java_lang_Thread_nativePeer = CacheField(env, java_lang_Thread, false, "nativePeer", "I");
183   java_lang_ThreadGroup_mainThreadGroup = CacheField(env, java_lang_ThreadGroup, true, "mainThreadGroup", "Ljava/lang/ThreadGroup;");
184   java_lang_ThreadGroup_name = CacheField(env, java_lang_ThreadGroup, false, "name", "Ljava/lang/String;");
185   java_lang_ThreadGroup_systemThreadGroup = CacheField(env, java_lang_ThreadGroup, true, "systemThreadGroup", "Ljava/lang/ThreadGroup;");
186   java_lang_reflect_AbstractMethod_artMethod = CacheField(env, java_lang_reflect_AbstractMethod, false, "artMethod", "Ljava/lang/reflect/ArtMethod;");
187   java_lang_reflect_Field_artField = CacheField(env, java_lang_reflect_Field, false, "artField", "Ljava/lang/reflect/ArtField;");
188   java_lang_reflect_Proxy_h = CacheField(env, java_lang_reflect_Proxy, false, "h", "Ljava/lang/reflect/InvocationHandler;");
189   java_nio_DirectByteBuffer_capacity = CacheField(env, java_nio_DirectByteBuffer, false, "capacity", "I");
190   java_nio_DirectByteBuffer_effectiveDirectAddress = CacheField(env, java_nio_DirectByteBuffer, false, "effectiveDirectAddress", "J");
191   org_apache_harmony_dalvik_ddmc_Chunk_data = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "data", "[B");
192   org_apache_harmony_dalvik_ddmc_Chunk_length = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "length", "I");
193   org_apache_harmony_dalvik_ddmc_Chunk_offset = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "offset", "I");
194   org_apache_harmony_dalvik_ddmc_Chunk_type = CacheField(env, org_apache_harmony_dalvik_ddmc_Chunk, false, "type", "I");
195 
196   java_lang_Boolean_valueOf = CachePrimitiveBoxingMethod(env, 'Z', "java/lang/Boolean");
197   java_lang_Byte_valueOf = CachePrimitiveBoxingMethod(env, 'B', "java/lang/Byte");
198   java_lang_Character_valueOf = CachePrimitiveBoxingMethod(env, 'C', "java/lang/Character");
199   java_lang_Double_valueOf = CachePrimitiveBoxingMethod(env, 'D', "java/lang/Double");
200   java_lang_Float_valueOf = CachePrimitiveBoxingMethod(env, 'F', "java/lang/Float");
201   java_lang_Integer_valueOf = CachePrimitiveBoxingMethod(env, 'I', "java/lang/Integer");
202   java_lang_Long_valueOf = CachePrimitiveBoxingMethod(env, 'J', "java/lang/Long");
203   java_lang_Short_valueOf = CachePrimitiveBoxingMethod(env, 'S', "java/lang/Short");
204 }
205 
LateInit(JNIEnv * env)206 void WellKnownClasses::LateInit(JNIEnv* env) {
207   ScopedLocalRef<jclass> java_lang_Runtime(env, env->FindClass("java/lang/Runtime"));
208   java_lang_Runtime_nativeLoad = CacheMethod(env, java_lang_Runtime.get(), true, "nativeLoad", "(Ljava/lang/String;Ljava/lang/ClassLoader;Ljava/lang/String;)Ljava/lang/String;");
209 }
210 
ToClass(jclass global_jclass)211 mirror::Class* WellKnownClasses::ToClass(jclass global_jclass) {
212   return reinterpret_cast<mirror::Class*>(Thread::Current()->DecodeJObject(global_jclass));
213 }
214 
215 }  // namespace art
216