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.h"
18 #include "base/enums.h"
19 #include "jni.h"
20 #include "mirror/array-inl.h"
21 #include "mirror/class-inl.h"
22 #include "mirror/dex_cache-inl.h"
23 #include "scoped_thread_state_change-inl.h"
24 #include "stack.h"
25 #include "thread.h"
26
27 namespace art {
28
29 namespace {
30
Java_Main_cloneResolvedMethods(JNIEnv * env,jclass,jclass cls)31 extern "C" JNIEXPORT jobject JNICALL Java_Main_cloneResolvedMethods(JNIEnv* env,
32 jclass,
33 jclass cls) {
34 ScopedObjectAccess soa(Thread::Current());
35 mirror::DexCache* dex_cache = soa.Decode<mirror::Class>(cls)->GetDexCache();
36 size_t num_methods = dex_cache->NumResolvedMethods();
37 ArtMethod** methods = dex_cache->GetResolvedMethods();
38 CHECK_EQ(num_methods != 0u, methods != nullptr);
39 if (num_methods == 0u) {
40 return nullptr;
41 }
42 jarray array;
43 if (sizeof(void*) == 4) {
44 array = env->NewIntArray(num_methods);
45 } else {
46 array = env->NewLongArray(num_methods);
47 }
48 CHECK(array != nullptr);
49 mirror::PointerArray* pointer_array = soa.Decode<mirror::PointerArray>(array).Ptr();
50 for (size_t i = 0; i != num_methods; ++i) {
51 ArtMethod* method = mirror::DexCache::GetElementPtrSize(methods, i, kRuntimePointerSize);
52 pointer_array->SetElementPtrSize(i, method, kRuntimePointerSize);
53 }
54 return array;
55 }
56
Java_Main_restoreResolvedMethods(JNIEnv *,jclass,jclass cls,jobject old_cache)57 extern "C" JNIEXPORT void JNICALL Java_Main_restoreResolvedMethods(
58 JNIEnv*, jclass, jclass cls, jobject old_cache) {
59 ScopedObjectAccess soa(Thread::Current());
60 mirror::DexCache* dex_cache = soa.Decode<mirror::Class>(cls)->GetDexCache();
61 size_t num_methods = dex_cache->NumResolvedMethods();
62 ArtMethod** methods = soa.Decode<mirror::Class>(cls)->GetDexCache()->GetResolvedMethods();
63 CHECK_EQ(num_methods != 0u, methods != nullptr);
64 ObjPtr<mirror::PointerArray> old = soa.Decode<mirror::PointerArray>(old_cache);
65 CHECK_EQ(methods != nullptr, old != nullptr);
66 CHECK_EQ(num_methods, static_cast<size_t>(old->GetLength()));
67 for (size_t i = 0; i != num_methods; ++i) {
68 ArtMethod* method = old->GetElementPtrSize<ArtMethod*>(i, kRuntimePointerSize);
69 mirror::DexCache::SetElementPtrSize(methods, i, method, kRuntimePointerSize);
70 }
71 }
72
73 } // namespace
74
75 } // namespace art
76