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 "java_lang_DexCache.h" 18 19 #include "dex_file.h" 20 #include "jni_internal.h" 21 #include "mirror/class-inl.h" 22 #include "mirror/dex_cache-inl.h" 23 #include "mirror/object-inl.h" 24 #include "scoped_fast_native_object_access.h" 25 #include "well_known_classes.h" 26 27 namespace art { 28 29 static jobject DexCache_getDexNative(JNIEnv* env, jobject javaDexCache) { 30 ScopedFastNativeObjectAccess soa(env); 31 mirror::DexCache* dex_cache = soa.Decode<mirror::DexCache*>(javaDexCache); 32 // Should only be called while holding the lock on the dex cache. 33 DCHECK_EQ(dex_cache->GetLockOwnerThreadId(), soa.Self()->GetThreadId()); 34 const DexFile* dex_file = dex_cache->GetDexFile(); 35 if (dex_file == nullptr) { 36 return nullptr; 37 } 38 void* address = const_cast<void*>(reinterpret_cast<const void*>(dex_file->Begin())); 39 jobject byte_buffer = env->NewDirectByteBuffer(address, dex_file->Size()); 40 if (byte_buffer == nullptr) { 41 DCHECK(soa.Self()->IsExceptionPending()); 42 return nullptr; 43 } 44 45 jvalue args[1]; 46 args[0].l = byte_buffer; 47 return env->CallStaticObjectMethodA(WellKnownClasses::com_android_dex_Dex, 48 WellKnownClasses::com_android_dex_Dex_create, 49 args); 50 } 51 52 static jobject DexCache_getResolvedType(JNIEnv* env, jobject javaDexCache, jint type_index) { 53 ScopedFastNativeObjectAccess soa(env); 54 mirror::DexCache* dex_cache = soa.Decode<mirror::DexCache*>(javaDexCache); 55 CHECK_LT(static_cast<size_t>(type_index), dex_cache->NumResolvedTypes()); 56 return soa.AddLocalReference<jobject>(dex_cache->GetResolvedType(type_index)); 57 } 58 59 static jobject DexCache_getResolvedString(JNIEnv* env, jobject javaDexCache, jint string_index) { 60 ScopedFastNativeObjectAccess soa(env); 61 mirror::DexCache* dex_cache = soa.Decode<mirror::DexCache*>(javaDexCache); 62 CHECK_LT(static_cast<size_t>(string_index), dex_cache->NumStrings()); 63 return soa.AddLocalReference<jobject>(dex_cache->GetResolvedString(string_index)); 64 } 65 66 static void DexCache_setResolvedType(JNIEnv* env, jobject javaDexCache, jint type_index, 67 jobject type) { 68 ScopedFastNativeObjectAccess soa(env); 69 mirror::DexCache* dex_cache = soa.Decode<mirror::DexCache*>(javaDexCache); 70 CHECK_LT(static_cast<size_t>(type_index), dex_cache->NumResolvedTypes()); 71 dex_cache->SetResolvedType(type_index, soa.Decode<mirror::Class*>(type)); 72 } 73 74 static void DexCache_setResolvedString(JNIEnv* env, jobject javaDexCache, jint string_index, 75 jobject string) { 76 ScopedFastNativeObjectAccess soa(env); 77 mirror::DexCache* dex_cache = soa.Decode<mirror::DexCache*>(javaDexCache); 78 CHECK_LT(static_cast<size_t>(string_index), dex_cache->NumStrings()); 79 dex_cache->SetResolvedString(string_index, soa.Decode<mirror::String*>(string)); 80 } 81 82 static JNINativeMethod gMethods[] = { 83 NATIVE_METHOD(DexCache, getDexNative, "!()Lcom/android/dex/Dex;"), 84 NATIVE_METHOD(DexCache, getResolvedType, "!(I)Ljava/lang/Class;"), 85 NATIVE_METHOD(DexCache, getResolvedString, "!(I)Ljava/lang/String;"), 86 NATIVE_METHOD(DexCache, setResolvedType, "!(ILjava/lang/Class;)V"), 87 NATIVE_METHOD(DexCache, setResolvedString, "!(ILjava/lang/String;)V"), 88 }; 89 90 void register_java_lang_DexCache(JNIEnv* env) { 91 REGISTER_NATIVE_METHODS("java/lang/DexCache"); 92 } 93 94 } // namespace art 95
