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/*
* Copyright (C) 2014 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.
*/
#ifndef ART_RUNTIME_DEOPTIMIZE_STACK_VISITOR_H_
#define ART_RUNTIME_DEOPTIMIZE_STACK_VISITOR_H_
#include "base/mutex.h"
#include "stack.h"
#include "thread.h"
namespace art {
namespace mirror {
class ArtMethod;
} // namespace mirror
class QuickExceptionHandler;
class Thread;
// Prepares deoptimization.
class DeoptimizeStackVisitor FINAL : public StackVisitor {
public:
DeoptimizeStackVisitor(Thread* self, Context* context, QuickExceptionHandler* exception_handler)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
: StackVisitor(self, context), self_(self), exception_handler_(exception_handler),
prev_shadow_frame_(nullptr) {
CHECK(!self_->HasDeoptimizationShadowFrame());
}
bool VisitFrame() OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
private:
bool HandleDeoptimization(mirror::ArtMethod* m) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
Thread* const self_;
QuickExceptionHandler* const exception_handler_;
ShadowFrame* prev_shadow_frame_;
DISALLOW_COPY_AND_ASSIGN(DeoptimizeStackVisitor);
};
} // namespace art
#endif // ART_RUNTIME_DEOPTIMIZE_STACK_VISITOR_H_
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