139 lines
4.6 KiB
C++
139 lines
4.6 KiB
C++
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_RUNTIME_QUICK_EXCEPTION_HANDLER_H_
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#define ART_RUNTIME_QUICK_EXCEPTION_HANDLER_H_
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#include "base/logging.h"
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#include "base/macros.h"
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#include "base/mutex.h"
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#include "stack.h" // StackReference
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namespace art {
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namespace mirror {
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class Throwable;
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} // namespace mirror
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class ArtMethod;
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class Context;
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class Thread;
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class ShadowFrame;
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// Manages exception delivery for Quick backend.
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class QuickExceptionHandler {
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public:
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QuickExceptionHandler(Thread* self, bool is_deoptimization)
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SHARED_REQUIRES(Locks::mutator_lock_);
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NO_RETURN ~QuickExceptionHandler() {
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LOG(FATAL) << "UNREACHABLE"; // Expected to take long jump.
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UNREACHABLE();
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}
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// Find the catch handler for the given exception.
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void FindCatch(mirror::Throwable* exception) SHARED_REQUIRES(Locks::mutator_lock_);
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// Deoptimize the stack to the upcall. For every compiled frame, we create a "copy"
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// shadow frame that will be executed with the interpreter.
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void DeoptimizeStack() SHARED_REQUIRES(Locks::mutator_lock_);
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void DeoptimizeSingleFrame() SHARED_REQUIRES(Locks::mutator_lock_);
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void DeoptimizeSingleFrameArchDependentFixup() SHARED_REQUIRES(Locks::mutator_lock_);
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// Update the instrumentation stack by removing all methods that will be unwound
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// by the exception being thrown.
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void UpdateInstrumentationStack() SHARED_REQUIRES(Locks::mutator_lock_);
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// Set up environment before delivering an exception to optimized code.
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void SetCatchEnvironmentForOptimizedHandler(StackVisitor* stack_visitor)
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SHARED_REQUIRES(Locks::mutator_lock_);
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// Long jump either to a catch handler or to the upcall.
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NO_RETURN void DoLongJump(bool smash_caller_saves = true) SHARED_REQUIRES(Locks::mutator_lock_);
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void SetHandlerQuickFrame(ArtMethod** handler_quick_frame) {
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handler_quick_frame_ = handler_quick_frame;
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}
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void SetHandlerQuickFramePc(uintptr_t handler_quick_frame_pc) {
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handler_quick_frame_pc_ = handler_quick_frame_pc;
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}
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void SetHandlerMethodHeader(const OatQuickMethodHeader* handler_method_header) {
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handler_method_header_ = handler_method_header;
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}
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void SetHandlerQuickArg0(uintptr_t handler_quick_arg0) {
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handler_quick_arg0_ = handler_quick_arg0;
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}
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ArtMethod* GetHandlerMethod() const {
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return handler_method_;
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}
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void SetHandlerMethod(ArtMethod* handler_quick_method) {
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handler_method_ = handler_quick_method;
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}
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uint32_t GetHandlerDexPc() const {
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return handler_dex_pc_;
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}
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void SetHandlerDexPc(uint32_t dex_pc) {
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handler_dex_pc_ = dex_pc;
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}
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void SetClearException(bool clear_exception) {
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clear_exception_ = clear_exception;
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}
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void SetHandlerFrameDepth(size_t frame_depth) {
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handler_frame_depth_ = frame_depth;
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}
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// Walk the stack frames of the given thread, printing out non-runtime methods with their types
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// of frames. Helps to verify that single-frame deopt really only deopted one frame.
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static void DumpFramesWithType(Thread* self, bool details = false)
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SHARED_REQUIRES(Locks::mutator_lock_);
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private:
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Thread* const self_;
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Context* const context_;
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// Should we deoptimize the stack?
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const bool is_deoptimization_;
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// Is method tracing active?
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const bool method_tracing_active_;
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// Quick frame with found handler or last frame if no handler found.
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ArtMethod** handler_quick_frame_;
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// PC to branch to for the handler.
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uintptr_t handler_quick_frame_pc_;
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// Quick code of the handler.
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const OatQuickMethodHeader* handler_method_header_;
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// The value for argument 0.
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uintptr_t handler_quick_arg0_;
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// The handler method to report to the debugger.
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ArtMethod* handler_method_;
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// The handler's dex PC, zero implies an uncaught exception.
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uint32_t handler_dex_pc_;
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// Should the exception be cleared as the catch block has no move-exception?
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bool clear_exception_;
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// Frame depth of the catch handler or the upcall.
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size_t handler_frame_depth_;
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DISALLOW_COPY_AND_ASSIGN(QuickExceptionHandler);
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};
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} // namespace art
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#endif // ART_RUNTIME_QUICK_EXCEPTION_HANDLER_H_
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