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
DexCache_getDexNative(JNIEnv * env,jobject javaDexCache)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
DexCache_getResolvedType(JNIEnv * env,jobject javaDexCache,jint type_index)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 return soa.AddLocalReference<jobject>(dex_cache->GetResolvedType(type_index));
56 }
57
DexCache_getResolvedString(JNIEnv * env,jobject javaDexCache,jint string_index)58 static jobject DexCache_getResolvedString(JNIEnv* env, jobject javaDexCache, jint string_index) {
59 ScopedFastNativeObjectAccess soa(env);
60 mirror::DexCache* dex_cache = soa.Decode<mirror::DexCache*>(javaDexCache);
61 return soa.AddLocalReference<jobject>(dex_cache->GetResolvedString(string_index));
62 }
63
DexCache_setResolvedType(JNIEnv * env,jobject javaDexCache,jint type_index,jobject type)64 static void DexCache_setResolvedType(JNIEnv* env, jobject javaDexCache, jint type_index,
65 jobject type) {
66 ScopedFastNativeObjectAccess soa(env);
67 mirror::DexCache* dex_cache = soa.Decode<mirror::DexCache*>(javaDexCache);
68 dex_cache->SetResolvedType(type_index, soa.Decode<mirror::Class*>(type));
69 }
70
DexCache_setResolvedString(JNIEnv * env,jobject javaDexCache,jint string_index,jobject string)71 static void DexCache_setResolvedString(JNIEnv* env, jobject javaDexCache, jint string_index,
72 jobject string) {
73 ScopedFastNativeObjectAccess soa(env);
74 mirror::DexCache* dex_cache = soa.Decode<mirror::DexCache*>(javaDexCache);
75 dex_cache->SetResolvedString(string_index, soa.Decode<mirror::String*>(string));
76 }
77
78 static JNINativeMethod gMethods[] = {
79 NATIVE_METHOD(DexCache, getDexNative, "!()Lcom/android/dex/Dex;"),
80 NATIVE_METHOD(DexCache, getResolvedType, "!(I)Ljava/lang/Class;"),
81 NATIVE_METHOD(DexCache, getResolvedString, "!(I)Ljava/lang/String;"),
82 NATIVE_METHOD(DexCache, setResolvedType, "!(ILjava/lang/Class;)V"),
83 NATIVE_METHOD(DexCache, setResolvedString, "!(ILjava/lang/String;)V"),
84 };
85
register_java_lang_DexCache(JNIEnv * env)86 void register_java_lang_DexCache(JNIEnv* env) {
87 REGISTER_NATIVE_METHODS("java/lang/DexCache");
88 }
89
90 } // namespace art
91