1 /* 2 * Copyright (C) 2008 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 "dex_file.h" 18 #include "mirror/dex_cache.h" 19 #include "mirror/object-inl.h" 20 #include "scoped_thread_state_change.h" 21 #include "well_known_classes.h" 22 23 namespace art { 24 25 static jobject DexCache_getDexNative(JNIEnv* env, jobject javaDexCache) { 26 ScopedObjectAccess soa(env); 27 mirror::DexCache* dex_cache = soa.Decode<mirror::DexCache*>(javaDexCache); 28 // Should only be called while holding the lock on the dex cache. 29 DCHECK_EQ(dex_cache->GetThinLockId(), soa.Self()->GetThinLockId()); 30 const DexFile* dex_file = dex_cache->GetDexFile(); 31 if (dex_file == NULL) { 32 return NULL; 33 } 34 void* address = const_cast<void*>(reinterpret_cast<const void*>(dex_file->Begin())); 35 jobject byte_buffer = env->NewDirectByteBuffer(address, dex_file->Size()); 36 if (byte_buffer == NULL) { 37 DCHECK(soa.Self()->IsExceptionPending()); 38 return NULL; 39 } 40 41 jvalue args[1]; 42 args[0].l = byte_buffer; 43 return env->CallStaticObjectMethodA(WellKnownClasses::com_android_dex_Dex, 44 WellKnownClasses::com_android_dex_Dex_create, 45 args); 46 } 47 48 static JNINativeMethod gMethods[] = { 49 NATIVE_METHOD(DexCache, getDexNative, "()Lcom/android/dex/Dex;"), 50 }; 51 52 void register_java_lang_DexCache(JNIEnv* env) { 53 REGISTER_NATIVE_METHODS("java/lang/DexCache"); 54 } 55 56 } // namespace art 57
