1 /*
2 * Copyright (C) 2015 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 "art_method-inl.h"
18 #include "jni.h"
19 #include "scoped_thread_state_change.h"
20 #include "stack.h"
21 #include "thread.h"
22
23 namespace art {
24
25 namespace {
26
Java_Main_cloneResolvedMethods(JNIEnv * env,jclass,jclass cls)27 extern "C" JNIEXPORT jobject JNICALL Java_Main_cloneResolvedMethods(JNIEnv* env,
28 jclass,
29 jclass cls) {
30 ScopedObjectAccess soa(Thread::Current());
31 mirror::DexCache* dex_cache = soa.Decode<mirror::Class*>(cls)->GetDexCache();
32 size_t num_methods = dex_cache->NumResolvedMethods();
33 ArtMethod** methods = dex_cache->GetResolvedMethods();
34 CHECK_EQ(num_methods != 0u, methods != nullptr);
35 if (num_methods == 0u) {
36 return nullptr;
37 }
38 jarray array;
39 if (sizeof(void*) == 4) {
40 array = env->NewIntArray(num_methods);
41 } else {
42 array = env->NewLongArray(num_methods);
43 }
44 CHECK(array != nullptr);
45 mirror::PointerArray* pointer_array = soa.Decode<mirror::PointerArray*>(array);
46 for (size_t i = 0; i != num_methods; ++i) {
47 ArtMethod* method = mirror::DexCache::GetElementPtrSize(methods, i, sizeof(void*));
48 pointer_array->SetElementPtrSize(i, method, sizeof(void*));
49 }
50 return array;
51 }
52
Java_Main_restoreResolvedMethods(JNIEnv *,jclass,jclass cls,jobject old_cache)53 extern "C" JNIEXPORT void JNICALL Java_Main_restoreResolvedMethods(
54 JNIEnv*, jclass, jclass cls, jobject old_cache) {
55 ScopedObjectAccess soa(Thread::Current());
56 mirror::DexCache* dex_cache = soa.Decode<mirror::Class*>(cls)->GetDexCache();
57 size_t num_methods = dex_cache->NumResolvedMethods();
58 ArtMethod** methods = soa.Decode<mirror::Class*>(cls)->GetDexCache()->GetResolvedMethods();
59 CHECK_EQ(num_methods != 0u, methods != nullptr);
60 mirror::PointerArray* old = soa.Decode<mirror::PointerArray*>(old_cache);
61 CHECK_EQ(methods != nullptr, old != nullptr);
62 CHECK_EQ(num_methods, static_cast<size_t>(old->GetLength()));
63 for (size_t i = 0; i != num_methods; ++i) {
64 ArtMethod* method = old->GetElementPtrSize<ArtMethod*>(i, sizeof(void*));
65 mirror::DexCache::SetElementPtrSize(methods, i, method, sizeof(void*));
66 }
67 }
68
69 } // namespace
70
71 } // namespace art
72