| /* |
| * Copyright (C) 2013 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 <algorithm> |
| #include <utility> |
| #include "thread.h" |
| #include "thread-inl.h" |
| #include "base/mutex.h" |
| #include "base/mutex-inl.h" |
| #include "base/logging.h" |
| #include "driver/compiler_driver.h" |
| |
| #include "dex_file_to_method_inliner_map.h" |
| |
| namespace art { |
| |
| DexFileToMethodInlinerMap::DexFileToMethodInlinerMap() |
| : lock_("DexFileToMethodInlinerMap lock", kDexFileToMethodInlinerMapLock) { |
| } |
| |
| DexFileToMethodInlinerMap::~DexFileToMethodInlinerMap() { |
| for (auto& entry : inliners_) { |
| delete entry.second; |
| } |
| } |
| |
| DexFileMethodInliner* DexFileToMethodInlinerMap::GetMethodInliner(const DexFile* dex_file) { |
| Thread* self = Thread::Current(); |
| { |
| ReaderMutexLock mu(self, lock_); |
| auto it = inliners_.find(dex_file); |
| if (it != inliners_.end()) { |
| return it->second; |
| } |
| } |
| |
| // We need to acquire our lock_ to modify inliners_ but we want to release it |
| // before we initialize the new inliner. However, we need to acquire the |
| // new inliner's lock_ before we release our lock_ to prevent another thread |
| // from using the uninitialized inliner. This requires explicit calls to |
| // ExclusiveLock()/ExclusiveUnlock() on one of the locks, the other one |
| // can use WriterMutexLock. |
| DexFileMethodInliner* locked_inliner; |
| { |
| WriterMutexLock mu(self, lock_); |
| DexFileMethodInliner** inliner = &inliners_[dex_file]; // inserts new entry if not found |
| if (*inliner) { |
| return *inliner; |
| } |
| *inliner = new DexFileMethodInliner; |
| DCHECK(*inliner != nullptr); |
| locked_inliner = *inliner; |
| locked_inliner->lock_.ExclusiveLock(self); // Acquire inliner's lock_ before releasing lock_. |
| } |
| locked_inliner->FindIntrinsics(dex_file); |
| locked_inliner->lock_.ExclusiveUnlock(self); |
| return locked_inliner; |
| } |
| |
| } // namespace art |