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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_CATCH_FINDER_H_
#define ART_RUNTIME_CATCH_FINDER_H_
#include "mirror/art_method-inl.h"
#include "thread.h"
namespace art {
static constexpr bool kDebugExceptionDelivery = false;
static constexpr size_t kInvalidFrameId = 0xffffffff;
// Manages exception delivery for Quick backend. Not used by Portable backend.
class CatchFinder {
public:
CatchFinder(Thread* self, const ThrowLocation& throw_location, mirror::Throwable* exception,
bool is_deoptimization)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
~CatchFinder() {
LOG(FATAL) << "UNREACHABLE"; // Expected to take long jump.
}
void FindCatch() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void UpdateInstrumentationStack() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void DoLongJump() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void SetHandlerQuickFrame(mirror::ArtMethod** handler_quick_frame) {
handler_quick_frame_ = handler_quick_frame;
}
void SetHandlerQuickFramePc(uintptr_t handler_quick_frame_pc) {
handler_quick_frame_pc_ = handler_quick_frame_pc;
}
void SetHandlerDexPc(uint32_t dex_pc) {
handler_dex_pc_ = dex_pc;
}
void SetClearException(bool clear_exception) {
clear_exception_ = clear_exception;
}
void SetTopShadowFrame(ShadowFrame* top_shadow_frame) {
top_shadow_frame_ = top_shadow_frame;
}
void SetHandlerFrameId(size_t frame_id) {
handler_frame_id_ = frame_id;
}
private:
Thread* const self_;
Context* const context_;
mirror::Throwable* const exception_;
const bool is_deoptimization_;
// Location of the throw.
const ThrowLocation& throw_location_;
// Is method tracing active?
const bool method_tracing_active_;
// Support for nesting no thread suspension checks.
const char* last_no_assert_suspension_cause_;
// Quick frame with found handler or last frame if no handler found.
mirror::ArtMethod** handler_quick_frame_;
// PC to branch to for the handler.
uintptr_t handler_quick_frame_pc_;
// Associated dex PC.
uint32_t handler_dex_pc_;
// Should the exception be cleared as the catch block has no move-exception?
bool clear_exception_;
// Deoptimization top shadow frame.
ShadowFrame* top_shadow_frame_;
// Frame id of the catch handler or the upcall.
size_t handler_frame_id_;
DISALLOW_COPY_AND_ASSIGN(CatchFinder);
};
} // namespace art
#endif // ART_RUNTIME_CATCH_FINDER_H_
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