java_lang_DexCache.cc revision 3d21bdf8894e780d349c481e5c9e29fe1556051c 
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
27namespace art {
28
29static 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
52static 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
58static 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
64static 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
71static 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
78static 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
86void register_java_lang_DexCache(JNIEnv* env) {
87  REGISTER_NATIVE_METHODS("java/lang/DexCache");
88}
89
90}  // namespace art
91