blob: 6c6a08f0dc8e9c58da1f539bb0c18b558fabe999 [file] [log] [blame]
/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "art_method.h"
#include "base/enums.h"
#include "jni.h"
#include "mirror/array-inl.h"
#include "mirror/class-inl.h"
#include "mirror/dex_cache-inl.h"
#include "scoped_thread_state_change-inl.h"
#include "stack.h"
#include "thread.h"
namespace art {
namespace {
extern "C" JNIEXPORT jobject JNICALL Java_Main_cloneResolvedMethods(JNIEnv* env,
jclass,
jclass cls) {
ScopedObjectAccess soa(Thread::Current());
ObjPtr<mirror::DexCache> dex_cache = soa.Decode<mirror::Class>(cls)->GetDexCache();
size_t num_methods = dex_cache->NumResolvedMethods();
mirror::MethodDexCacheType* methods = dex_cache->GetResolvedMethods();
CHECK_EQ(num_methods != 0u, methods != nullptr);
if (num_methods == 0u) {
return nullptr;
}
jarray array;
if (sizeof(void*) == 4) {
array = env->NewIntArray(2u * num_methods);
} else {
array = env->NewLongArray(2u * num_methods);
}
CHECK(array != nullptr);
ObjPtr<mirror::Array> decoded_array = soa.Decode<mirror::Array>(array);
for (size_t i = 0; i != num_methods; ++i) {
auto pair = mirror::DexCache::GetNativePairPtrSize(methods, i, kRuntimePointerSize);
uint32_t index = pair.index;
ArtMethod* method = pair.object;
if (sizeof(void*) == 4) {
ObjPtr<mirror::IntArray> int_array = ObjPtr<mirror::IntArray>::DownCast(decoded_array);
int_array->Set(2u * i, index);
int_array->Set(2u * i + 1u, reinterpret_cast32<jint>(method));
} else {
ObjPtr<mirror::LongArray> long_array = ObjPtr<mirror::LongArray>::DownCast(decoded_array);
long_array->Set(2u * i, index);
long_array->Set(2u * i + 1u, reinterpret_cast64<jlong>(method));
}
}
return array;
}
extern "C" JNIEXPORT void JNICALL Java_Main_restoreResolvedMethods(
JNIEnv*, jclass, jclass cls, jobject old_cache) {
ScopedObjectAccess soa(Thread::Current());
ObjPtr<mirror::DexCache> dex_cache = soa.Decode<mirror::Class>(cls)->GetDexCache();
size_t num_methods = dex_cache->NumResolvedMethods();
mirror::MethodDexCacheType* methods = dex_cache->GetResolvedMethods();
CHECK_EQ(num_methods != 0u, methods != nullptr);
ObjPtr<mirror::Array> old = soa.Decode<mirror::Array>(old_cache);
CHECK_EQ(methods != nullptr, old != nullptr);
CHECK_EQ(num_methods, static_cast<size_t>(old->GetLength()));
for (size_t i = 0; i != num_methods; ++i) {
uint32_t index;
ArtMethod* method;
if (sizeof(void*) == 4) {
ObjPtr<mirror::IntArray> int_array = ObjPtr<mirror::IntArray>::DownCast(old);
index = static_cast<uint32_t>(int_array->Get(2u * i));
method = reinterpret_cast32<ArtMethod*>(int_array->Get(2u * i + 1u));
} else {
ObjPtr<mirror::LongArray> long_array = ObjPtr<mirror::LongArray>::DownCast(old);
index = dchecked_integral_cast<uint32_t>(long_array->Get(2u * i));
method = reinterpret_cast64<ArtMethod*>(long_array->Get(2u * i + 1u));
}
mirror::MethodDexCachePair pair(method, index);
mirror::DexCache::SetNativePairPtrSize(methods, i, pair, kRuntimePointerSize);
}
}
} // namespace
} // namespace art