upload android base code part3
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679
android/art/runtime/instrumentation.h
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679
android/art/runtime/instrumentation.h
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/*
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* Copyright (C) 2011 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_INSTRUMENTATION_H_
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#define ART_RUNTIME_INSTRUMENTATION_H_
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#include <stdint.h>
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#include <list>
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#include <unordered_set>
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#include "arch/instruction_set.h"
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#include "base/enums.h"
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#include "base/macros.h"
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#include "base/mutex.h"
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#include "gc_root.h"
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#include "safe_map.h"
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namespace art {
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namespace mirror {
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class Class;
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class Object;
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class Throwable;
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} // namespace mirror
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class ArtField;
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class ArtMethod;
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template <typename T> class Handle;
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union JValue;
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class Thread;
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namespace instrumentation {
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// Interpreter handler tables.
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enum InterpreterHandlerTable {
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kMainHandlerTable = 0, // Main handler table: no suspend check, no instrumentation.
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kAlternativeHandlerTable = 1, // Alternative handler table: suspend check and/or instrumentation
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// enabled.
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kNumHandlerTables
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};
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// Do we want to deoptimize for method entry and exit listeners or just try to intercept
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// invocations? Deoptimization forces all code to run in the interpreter and considerably hurts the
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// application's performance.
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static constexpr bool kDeoptimizeForAccurateMethodEntryExitListeners = true;
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// Instrumentation event listener API. Registered listeners will get the appropriate call back for
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// the events they are listening for. The call backs supply the thread, method and dex_pc the event
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// occurred upon. The thread may or may not be Thread::Current().
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struct InstrumentationListener {
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InstrumentationListener() {}
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virtual ~InstrumentationListener() {}
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// Call-back for when a method is entered.
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virtual void MethodEntered(Thread* thread,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t dex_pc) REQUIRES_SHARED(Locks::mutator_lock_) = 0;
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virtual void MethodExited(Thread* thread,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t dex_pc,
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Handle<mirror::Object> return_value)
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REQUIRES_SHARED(Locks::mutator_lock_);
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// Call-back for when a method is exited. The implementor should either handler-ize the return
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// value (if appropriate) or use the alternate MethodExited callback instead if they need to
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// go through a suspend point.
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virtual void MethodExited(Thread* thread,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t dex_pc,
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const JValue& return_value)
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REQUIRES_SHARED(Locks::mutator_lock_) = 0;
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// Call-back for when a method is popped due to an exception throw. A method will either cause a
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// MethodExited call-back or a MethodUnwind call-back when its activation is removed.
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virtual void MethodUnwind(Thread* thread,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t dex_pc)
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REQUIRES_SHARED(Locks::mutator_lock_) = 0;
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// Call-back for when the dex pc moves in a method.
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virtual void DexPcMoved(Thread* thread,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t new_dex_pc)
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REQUIRES_SHARED(Locks::mutator_lock_) = 0;
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// Call-back for when we read from a field.
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virtual void FieldRead(Thread* thread,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t dex_pc,
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ArtField* field) = 0;
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virtual void FieldWritten(Thread* thread,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t dex_pc,
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ArtField* field,
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Handle<mirror::Object> field_value)
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REQUIRES_SHARED(Locks::mutator_lock_);
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// Call-back for when we write into a field.
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virtual void FieldWritten(Thread* thread,
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Handle<mirror::Object> this_object,
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ArtMethod* method,
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uint32_t dex_pc,
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ArtField* field,
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const JValue& field_value)
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REQUIRES_SHARED(Locks::mutator_lock_) = 0;
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// Call-back when an exception is caught.
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virtual void ExceptionCaught(Thread* thread,
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Handle<mirror::Throwable> exception_object)
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REQUIRES_SHARED(Locks::mutator_lock_) = 0;
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// Call-back for when we execute a branch.
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virtual void Branch(Thread* thread,
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ArtMethod* method,
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uint32_t dex_pc,
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int32_t dex_pc_offset)
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REQUIRES_SHARED(Locks::mutator_lock_) = 0;
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// Call-back for when we get an invokevirtual or an invokeinterface.
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virtual void InvokeVirtualOrInterface(Thread* thread,
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Handle<mirror::Object> this_object,
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ArtMethod* caller,
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uint32_t dex_pc,
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ArtMethod* callee)
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REQUIRES_SHARED(Locks::mutator_lock_) = 0;
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};
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// Instrumentation is a catch-all for when extra information is required from the runtime. The
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// typical use for instrumentation is for profiling and debugging. Instrumentation may add stubs
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// to method entry and exit, it may also force execution to be switched to the interpreter and
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// trigger deoptimization.
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class Instrumentation {
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public:
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enum InstrumentationEvent {
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kMethodEntered = 0x1,
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kMethodExited = 0x2,
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kMethodUnwind = 0x4,
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kDexPcMoved = 0x8,
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kFieldRead = 0x10,
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kFieldWritten = 0x20,
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kExceptionCaught = 0x40,
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kBranch = 0x80,
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kInvokeVirtualOrInterface = 0x100,
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};
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enum class InstrumentationLevel {
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kInstrumentNothing, // execute without instrumentation
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kInstrumentWithInstrumentationStubs, // execute with instrumentation entry/exit stubs
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kInstrumentWithInterpreter // execute with interpreter
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};
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Instrumentation();
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// Add a listener to be notified of the masked together sent of instrumentation events. This
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// suspend the runtime to install stubs. You are expected to hold the mutator lock as a proxy
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// for saying you should have suspended all threads (installing stubs while threads are running
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// will break).
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void AddListener(InstrumentationListener* listener, uint32_t events)
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REQUIRES(Locks::mutator_lock_, !Locks::thread_list_lock_, !Locks::classlinker_classes_lock_);
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// Removes a listener possibly removing instrumentation stubs.
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void RemoveListener(InstrumentationListener* listener, uint32_t events)
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REQUIRES(Locks::mutator_lock_, !Locks::thread_list_lock_, !Locks::classlinker_classes_lock_);
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// Deoptimization.
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void EnableDeoptimization()
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REQUIRES(Locks::mutator_lock_)
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REQUIRES(!deoptimized_methods_lock_);
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// Calls UndeoptimizeEverything which may visit class linker classes through ConfigureStubs.
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void DisableDeoptimization(const char* key)
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REQUIRES(Locks::mutator_lock_, Roles::uninterruptible_)
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REQUIRES(!deoptimized_methods_lock_);
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bool AreAllMethodsDeoptimized() const {
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return interpreter_stubs_installed_;
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}
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bool ShouldNotifyMethodEnterExitEvents() const REQUIRES_SHARED(Locks::mutator_lock_);
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// Executes everything with interpreter.
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void DeoptimizeEverything(const char* key)
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REQUIRES(Locks::mutator_lock_, Roles::uninterruptible_)
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REQUIRES(!Locks::thread_list_lock_,
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!Locks::classlinker_classes_lock_,
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!deoptimized_methods_lock_);
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// Executes everything with compiled code (or interpreter if there is no code). May visit class
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// linker classes through ConfigureStubs.
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void UndeoptimizeEverything(const char* key)
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REQUIRES(Locks::mutator_lock_, Roles::uninterruptible_)
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REQUIRES(!Locks::thread_list_lock_,
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!Locks::classlinker_classes_lock_,
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!deoptimized_methods_lock_);
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// Deoptimize a method by forcing its execution with the interpreter. Nevertheless, a static
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// method (except a class initializer) set to the resolution trampoline will be deoptimized only
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// once its declaring class is initialized.
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void Deoptimize(ArtMethod* method)
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REQUIRES(Locks::mutator_lock_, !Locks::thread_list_lock_, !deoptimized_methods_lock_);
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// Undeoptimze the method by restoring its entrypoints. Nevertheless, a static method
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// (except a class initializer) set to the resolution trampoline will be updated only once its
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// declaring class is initialized.
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void Undeoptimize(ArtMethod* method)
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REQUIRES(Locks::mutator_lock_, !Locks::thread_list_lock_, !deoptimized_methods_lock_);
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// Indicates whether the method has been deoptimized so it is executed with the interpreter.
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bool IsDeoptimized(ArtMethod* method)
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REQUIRES(!deoptimized_methods_lock_) REQUIRES_SHARED(Locks::mutator_lock_);
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// Enable method tracing by installing instrumentation entry/exit stubs or interpreter.
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void EnableMethodTracing(const char* key,
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bool needs_interpreter = kDeoptimizeForAccurateMethodEntryExitListeners)
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REQUIRES(Locks::mutator_lock_, Roles::uninterruptible_)
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REQUIRES(!Locks::thread_list_lock_,
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!Locks::classlinker_classes_lock_,
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!deoptimized_methods_lock_);
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// Disable method tracing by uninstalling instrumentation entry/exit stubs or interpreter.
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void DisableMethodTracing(const char* key)
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REQUIRES(Locks::mutator_lock_, Roles::uninterruptible_)
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REQUIRES(!Locks::thread_list_lock_,
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!Locks::classlinker_classes_lock_,
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!deoptimized_methods_lock_);
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InterpreterHandlerTable GetInterpreterHandlerTable() const
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REQUIRES_SHARED(Locks::mutator_lock_) {
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return interpreter_handler_table_;
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}
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void InstrumentQuickAllocEntryPoints() REQUIRES(!Locks::instrument_entrypoints_lock_);
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void UninstrumentQuickAllocEntryPoints() REQUIRES(!Locks::instrument_entrypoints_lock_);
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void InstrumentQuickAllocEntryPointsLocked()
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REQUIRES(Locks::instrument_entrypoints_lock_, !Locks::thread_list_lock_,
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!Locks::runtime_shutdown_lock_);
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void UninstrumentQuickAllocEntryPointsLocked()
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REQUIRES(Locks::instrument_entrypoints_lock_, !Locks::thread_list_lock_,
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!Locks::runtime_shutdown_lock_);
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void ResetQuickAllocEntryPoints() REQUIRES(Locks::runtime_shutdown_lock_);
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// Update the code of a method respecting any installed stubs.
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void UpdateMethodsCode(ArtMethod* method, const void* quick_code)
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REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!deoptimized_methods_lock_);
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// Update the code of a method respecting any installed stubs from debugger.
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void UpdateMethodsCodeForJavaDebuggable(ArtMethod* method, const void* quick_code)
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REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!deoptimized_methods_lock_);
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// Get the quick code for the given method. More efficient than asking the class linker as it
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// will short-cut to GetCode if instrumentation and static method resolution stubs aren't
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// installed.
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const void* GetQuickCodeFor(ArtMethod* method, PointerSize pointer_size) const
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REQUIRES_SHARED(Locks::mutator_lock_);
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void ForceInterpretOnly() {
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interpret_only_ = true;
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forced_interpret_only_ = true;
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}
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// Called by ArtMethod::Invoke to determine dispatch mechanism.
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bool InterpretOnly() const {
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return interpret_only_;
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}
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bool IsForcedInterpretOnly() const {
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return forced_interpret_only_;
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}
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// Code is in boot image oat file which isn't compiled as debuggable.
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// Need debug version (interpreter or jitted) if that's the case.
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bool NeedDebugVersionFor(ArtMethod* method) const
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REQUIRES_SHARED(Locks::mutator_lock_);
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bool AreExitStubsInstalled() const {
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return instrumentation_stubs_installed_;
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}
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bool HasMethodEntryListeners() const REQUIRES_SHARED(Locks::mutator_lock_) {
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return have_method_entry_listeners_;
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}
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bool HasMethodExitListeners() const REQUIRES_SHARED(Locks::mutator_lock_) {
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return have_method_exit_listeners_;
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}
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bool HasMethodUnwindListeners() const REQUIRES_SHARED(Locks::mutator_lock_) {
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return have_method_unwind_listeners_;
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}
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bool HasDexPcListeners() const REQUIRES_SHARED(Locks::mutator_lock_) {
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return have_dex_pc_listeners_;
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}
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bool HasFieldReadListeners() const REQUIRES_SHARED(Locks::mutator_lock_) {
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return have_field_read_listeners_;
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}
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bool HasFieldWriteListeners() const REQUIRES_SHARED(Locks::mutator_lock_) {
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return have_field_write_listeners_;
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}
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bool HasExceptionCaughtListeners() const REQUIRES_SHARED(Locks::mutator_lock_) {
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return have_exception_caught_listeners_;
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}
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bool HasBranchListeners() const REQUIRES_SHARED(Locks::mutator_lock_) {
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return have_branch_listeners_;
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}
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bool HasInvokeVirtualOrInterfaceListeners() const REQUIRES_SHARED(Locks::mutator_lock_) {
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return have_invoke_virtual_or_interface_listeners_;
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}
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bool IsActive() const REQUIRES_SHARED(Locks::mutator_lock_) {
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return have_dex_pc_listeners_ || have_method_entry_listeners_ || have_method_exit_listeners_ ||
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have_field_read_listeners_ || have_field_write_listeners_ ||
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have_exception_caught_listeners_ || have_method_unwind_listeners_ ||
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have_branch_listeners_ || have_invoke_virtual_or_interface_listeners_;
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}
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// Any instrumentation *other* than what is needed for Jit profiling active?
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bool NonJitProfilingActive() const REQUIRES_SHARED(Locks::mutator_lock_) {
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return have_dex_pc_listeners_ || have_method_exit_listeners_ ||
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have_field_read_listeners_ || have_field_write_listeners_ ||
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have_exception_caught_listeners_ || have_method_unwind_listeners_ ||
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have_branch_listeners_;
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}
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// Inform listeners that a method has been entered. A dex PC is provided as we may install
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// listeners into executing code and get method enter events for methods already on the stack.
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void MethodEnterEvent(Thread* thread, mirror::Object* this_object,
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ArtMethod* method, uint32_t dex_pc) const
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REQUIRES_SHARED(Locks::mutator_lock_) {
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if (UNLIKELY(HasMethodEntryListeners())) {
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MethodEnterEventImpl(thread, this_object, method, dex_pc);
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}
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}
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// Inform listeners that a method has been exited.
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void MethodExitEvent(Thread* thread,
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mirror::Object* this_object,
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ArtMethod* method,
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uint32_t dex_pc,
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const JValue& return_value) const
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REQUIRES_SHARED(Locks::mutator_lock_) {
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if (UNLIKELY(HasMethodExitListeners())) {
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MethodExitEventImpl(thread, this_object, method, dex_pc, return_value);
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}
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}
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// Inform listeners that a method has been exited due to an exception.
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void MethodUnwindEvent(Thread* thread, mirror::Object* this_object,
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ArtMethod* method, uint32_t dex_pc) const
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REQUIRES_SHARED(Locks::mutator_lock_);
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// Inform listeners that the dex pc has moved (only supported by the interpreter).
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void DexPcMovedEvent(Thread* thread, mirror::Object* this_object,
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ArtMethod* method, uint32_t dex_pc) const
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REQUIRES_SHARED(Locks::mutator_lock_) {
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if (UNLIKELY(HasDexPcListeners())) {
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DexPcMovedEventImpl(thread, this_object, method, dex_pc);
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}
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}
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// Inform listeners that a branch has been taken (only supported by the interpreter).
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void Branch(Thread* thread, ArtMethod* method, uint32_t dex_pc, int32_t offset) const
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REQUIRES_SHARED(Locks::mutator_lock_) {
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if (UNLIKELY(HasBranchListeners())) {
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BranchImpl(thread, method, dex_pc, offset);
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}
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}
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// Inform listeners that we read a field (only supported by the interpreter).
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void FieldReadEvent(Thread* thread, mirror::Object* this_object,
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ArtMethod* method, uint32_t dex_pc,
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ArtField* field) const
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REQUIRES_SHARED(Locks::mutator_lock_) {
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if (UNLIKELY(HasFieldReadListeners())) {
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FieldReadEventImpl(thread, this_object, method, dex_pc, field);
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}
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}
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// Inform listeners that we write a field (only supported by the interpreter).
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void FieldWriteEvent(Thread* thread, mirror::Object* this_object,
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ArtMethod* method, uint32_t dex_pc,
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ArtField* field, const JValue& field_value) const
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REQUIRES_SHARED(Locks::mutator_lock_) {
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if (UNLIKELY(HasFieldWriteListeners())) {
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FieldWriteEventImpl(thread, this_object, method, dex_pc, field, field_value);
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}
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}
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void InvokeVirtualOrInterface(Thread* thread,
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mirror::Object* this_object,
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ArtMethod* caller,
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uint32_t dex_pc,
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ArtMethod* callee) const
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REQUIRES_SHARED(Locks::mutator_lock_) {
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if (UNLIKELY(HasInvokeVirtualOrInterfaceListeners())) {
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InvokeVirtualOrInterfaceImpl(thread, this_object, caller, dex_pc, callee);
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}
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}
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// Inform listeners that an exception was caught.
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void ExceptionCaughtEvent(Thread* thread, mirror::Throwable* exception_object) const
|
||||
REQUIRES_SHARED(Locks::mutator_lock_);
|
||||
|
||||
// Called when an instrumented method is entered. The intended link register (lr) is saved so
|
||||
// that returning causes a branch to the method exit stub. Generates method enter events.
|
||||
void PushInstrumentationStackFrame(Thread* self, mirror::Object* this_object,
|
||||
ArtMethod* method, uintptr_t lr,
|
||||
bool interpreter_entry)
|
||||
REQUIRES_SHARED(Locks::mutator_lock_);
|
||||
|
||||
// Called when an instrumented method is exited. Removes the pushed instrumentation frame
|
||||
// returning the intended link register. Generates method exit events. The gpr_result and
|
||||
// fpr_result pointers are pointers to the locations where the integer/pointer and floating point
|
||||
// result values of the function are stored. Both pointers must always be valid but the values
|
||||
// held there will only be meaningful if interpreted as the appropriate type given the function
|
||||
// being returned from.
|
||||
TwoWordReturn PopInstrumentationStackFrame(Thread* self, uintptr_t* return_pc,
|
||||
uint64_t* gpr_result, uint64_t* fpr_result)
|
||||
REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!deoptimized_methods_lock_);
|
||||
|
||||
// Pops an instrumentation frame from the current thread and generate an unwind event.
|
||||
// Returns the return pc for the instrumentation frame that's popped.
|
||||
uintptr_t PopMethodForUnwind(Thread* self, bool is_deoptimization) const
|
||||
REQUIRES_SHARED(Locks::mutator_lock_);
|
||||
|
||||
// Call back for configure stubs.
|
||||
void InstallStubsForClass(mirror::Class* klass) REQUIRES_SHARED(Locks::mutator_lock_)
|
||||
REQUIRES(!deoptimized_methods_lock_);
|
||||
|
||||
void InstallStubsForMethod(ArtMethod* method)
|
||||
REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!deoptimized_methods_lock_);
|
||||
|
||||
// Install instrumentation exit stub on every method of the stack of the given thread.
|
||||
// This is used by the debugger to cause a deoptimization of the thread's stack after updating
|
||||
// local variable(s).
|
||||
void InstrumentThreadStack(Thread* thread)
|
||||
REQUIRES_SHARED(Locks::mutator_lock_)
|
||||
REQUIRES(!Locks::thread_list_lock_);
|
||||
|
||||
static size_t ComputeFrameId(Thread* self,
|
||||
size_t frame_depth,
|
||||
size_t inlined_frames_before_frame)
|
||||
REQUIRES_SHARED(Locks::mutator_lock_);
|
||||
|
||||
// Does not hold lock, used to check if someone changed from not instrumented to instrumented
|
||||
// during a GC suspend point.
|
||||
bool AllocEntrypointsInstrumented() const REQUIRES_SHARED(Locks::mutator_lock_) {
|
||||
return alloc_entrypoints_instrumented_;
|
||||
}
|
||||
|
||||
InstrumentationLevel GetCurrentInstrumentationLevel() const;
|
||||
|
||||
private:
|
||||
// Returns true if moving to the given instrumentation level requires the installation of stubs.
|
||||
// False otherwise.
|
||||
bool RequiresInstrumentationInstallation(InstrumentationLevel new_level) const;
|
||||
|
||||
// Does the job of installing or removing instrumentation code within methods.
|
||||
// In order to support multiple clients using instrumentation at the same time,
|
||||
// the caller must pass a unique key (a string) identifying it so we remind which
|
||||
// instrumentation level it needs. Therefore the current instrumentation level
|
||||
// becomes the highest instrumentation level required by a client.
|
||||
void ConfigureStubs(const char* key, InstrumentationLevel desired_instrumentation_level)
|
||||
REQUIRES(Locks::mutator_lock_, Roles::uninterruptible_)
|
||||
REQUIRES(!deoptimized_methods_lock_,
|
||||
!Locks::thread_list_lock_,
|
||||
!Locks::classlinker_classes_lock_);
|
||||
|
||||
void UpdateInterpreterHandlerTable() REQUIRES(Locks::mutator_lock_) {
|
||||
/*
|
||||
* TUNING: Dalvik's mterp stashes the actual current handler table base in a
|
||||
* tls field. For Arm, this enables all suspend, debug & tracing checks to be
|
||||
* collapsed into a single conditionally-executed ldw instruction.
|
||||
* Move to Dalvik-style handler-table management for both the goto interpreter and
|
||||
* mterp.
|
||||
*/
|
||||
interpreter_handler_table_ = IsActive() ? kAlternativeHandlerTable : kMainHandlerTable;
|
||||
}
|
||||
|
||||
// No thread safety analysis to get around SetQuickAllocEntryPointsInstrumented requiring
|
||||
// exclusive access to mutator lock which you can't get if the runtime isn't started.
|
||||
void SetEntrypointsInstrumented(bool instrumented) NO_THREAD_SAFETY_ANALYSIS;
|
||||
|
||||
void MethodEnterEventImpl(Thread* thread,
|
||||
ObjPtr<mirror::Object> this_object,
|
||||
ArtMethod* method,
|
||||
uint32_t dex_pc) const
|
||||
REQUIRES_SHARED(Locks::mutator_lock_);
|
||||
void MethodExitEventImpl(Thread* thread,
|
||||
ObjPtr<mirror::Object> this_object,
|
||||
ArtMethod* method,
|
||||
uint32_t dex_pc,
|
||||
const JValue& return_value) const
|
||||
REQUIRES_SHARED(Locks::mutator_lock_);
|
||||
void DexPcMovedEventImpl(Thread* thread,
|
||||
ObjPtr<mirror::Object> this_object,
|
||||
ArtMethod* method,
|
||||
uint32_t dex_pc) const
|
||||
REQUIRES_SHARED(Locks::mutator_lock_);
|
||||
void BranchImpl(Thread* thread, ArtMethod* method, uint32_t dex_pc, int32_t offset) const
|
||||
REQUIRES_SHARED(Locks::mutator_lock_);
|
||||
void InvokeVirtualOrInterfaceImpl(Thread* thread,
|
||||
ObjPtr<mirror::Object> this_object,
|
||||
ArtMethod* caller,
|
||||
uint32_t dex_pc,
|
||||
ArtMethod* callee) const
|
||||
REQUIRES_SHARED(Locks::mutator_lock_);
|
||||
void FieldReadEventImpl(Thread* thread,
|
||||
ObjPtr<mirror::Object> this_object,
|
||||
ArtMethod* method,
|
||||
uint32_t dex_pc,
|
||||
ArtField* field) const
|
||||
REQUIRES_SHARED(Locks::mutator_lock_);
|
||||
void FieldWriteEventImpl(Thread* thread,
|
||||
ObjPtr<mirror::Object> this_object,
|
||||
ArtMethod* method,
|
||||
uint32_t dex_pc,
|
||||
ArtField* field,
|
||||
const JValue& field_value) const
|
||||
REQUIRES_SHARED(Locks::mutator_lock_);
|
||||
|
||||
// Read barrier-aware utility functions for accessing deoptimized_methods_
|
||||
bool AddDeoptimizedMethod(ArtMethod* method)
|
||||
REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(deoptimized_methods_lock_);
|
||||
bool IsDeoptimizedMethod(ArtMethod* method)
|
||||
REQUIRES_SHARED(Locks::mutator_lock_, deoptimized_methods_lock_);
|
||||
bool RemoveDeoptimizedMethod(ArtMethod* method)
|
||||
REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(deoptimized_methods_lock_);
|
||||
ArtMethod* BeginDeoptimizedMethod()
|
||||
REQUIRES_SHARED(Locks::mutator_lock_, deoptimized_methods_lock_);
|
||||
bool IsDeoptimizedMethodsEmpty() const
|
||||
REQUIRES_SHARED(Locks::mutator_lock_, deoptimized_methods_lock_);
|
||||
void UpdateMethodsCodeImpl(ArtMethod* method, const void* quick_code)
|
||||
REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!deoptimized_methods_lock_);
|
||||
|
||||
|
||||
// Have we hijacked ArtMethod::code_ so that it calls instrumentation/interpreter code?
|
||||
bool instrumentation_stubs_installed_;
|
||||
|
||||
// Have we hijacked ArtMethod::code_ to reference the enter/exit stubs?
|
||||
bool entry_exit_stubs_installed_;
|
||||
|
||||
// Have we hijacked ArtMethod::code_ to reference the enter interpreter stub?
|
||||
bool interpreter_stubs_installed_;
|
||||
|
||||
// Do we need the fidelity of events that we only get from running within the interpreter?
|
||||
bool interpret_only_;
|
||||
|
||||
// Did the runtime request we only run in the interpreter? ie -Xint mode.
|
||||
bool forced_interpret_only_;
|
||||
|
||||
// Do we have any listeners for method entry events? Short-cut to avoid taking the
|
||||
// instrumentation_lock_.
|
||||
bool have_method_entry_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
|
||||
// Do we have any listeners for method exit events? Short-cut to avoid taking the
|
||||
// instrumentation_lock_.
|
||||
bool have_method_exit_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
|
||||
// Do we have any listeners for method unwind events? Short-cut to avoid taking the
|
||||
// instrumentation_lock_.
|
||||
bool have_method_unwind_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
|
||||
// Do we have any listeners for dex move events? Short-cut to avoid taking the
|
||||
// instrumentation_lock_.
|
||||
bool have_dex_pc_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
|
||||
// Do we have any listeners for field read events? Short-cut to avoid taking the
|
||||
// instrumentation_lock_.
|
||||
bool have_field_read_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
|
||||
// Do we have any listeners for field write events? Short-cut to avoid taking the
|
||||
// instrumentation_lock_.
|
||||
bool have_field_write_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
|
||||
// Do we have any exception caught listeners? Short-cut to avoid taking the instrumentation_lock_.
|
||||
bool have_exception_caught_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
|
||||
// Do we have any branch listeners? Short-cut to avoid taking the instrumentation_lock_.
|
||||
bool have_branch_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
|
||||
// Do we have any invoke listeners? Short-cut to avoid taking the instrumentation_lock_.
|
||||
bool have_invoke_virtual_or_interface_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
|
||||
// Contains the instrumentation level required by each client of the instrumentation identified
|
||||
// by a string key.
|
||||
typedef SafeMap<const char*, InstrumentationLevel> InstrumentationLevelTable;
|
||||
InstrumentationLevelTable requested_instrumentation_levels_ GUARDED_BY(Locks::mutator_lock_);
|
||||
|
||||
// The event listeners, written to with the mutator_lock_ exclusively held.
|
||||
// Mutators must be able to iterate over these lists concurrently, that is, with listeners being
|
||||
// added or removed while iterating. The modifying thread holds exclusive lock,
|
||||
// so other threads cannot iterate (i.e. read the data of the list) at the same time but they
|
||||
// do keep iterators that need to remain valid. This is the reason these listeners are std::list
|
||||
// and not for example std::vector: the existing storage for a std::list does not move.
|
||||
// Note that mutators cannot make a copy of these lists before iterating, as the instrumentation
|
||||
// listeners can also be deleted concurrently.
|
||||
// As a result, these lists are never trimmed. That's acceptable given the low number of
|
||||
// listeners we have.
|
||||
std::list<InstrumentationListener*> method_entry_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
std::list<InstrumentationListener*> method_exit_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
std::list<InstrumentationListener*> method_unwind_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
std::list<InstrumentationListener*> branch_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
std::list<InstrumentationListener*> invoke_virtual_or_interface_listeners_
|
||||
GUARDED_BY(Locks::mutator_lock_);
|
||||
std::list<InstrumentationListener*> dex_pc_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
std::list<InstrumentationListener*> field_read_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
std::list<InstrumentationListener*> field_write_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
std::list<InstrumentationListener*> exception_caught_listeners_ GUARDED_BY(Locks::mutator_lock_);
|
||||
|
||||
// The set of methods being deoptimized (by the debugger) which must be executed with interpreter
|
||||
// only.
|
||||
mutable ReaderWriterMutex deoptimized_methods_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
|
||||
std::unordered_set<ArtMethod*> deoptimized_methods_ GUARDED_BY(deoptimized_methods_lock_);
|
||||
bool deoptimization_enabled_;
|
||||
|
||||
// Current interpreter handler table. This is updated each time the thread state flags are
|
||||
// modified.
|
||||
InterpreterHandlerTable interpreter_handler_table_ GUARDED_BY(Locks::mutator_lock_);
|
||||
|
||||
// Greater than 0 if quick alloc entry points instrumented.
|
||||
size_t quick_alloc_entry_points_instrumentation_counter_;
|
||||
|
||||
// alloc_entrypoints_instrumented_ is only updated with all the threads suspended, this is done
|
||||
// to prevent races with the GC where the GC relies on thread suspension only see
|
||||
// alloc_entrypoints_instrumented_ change during suspend points.
|
||||
bool alloc_entrypoints_instrumented_;
|
||||
|
||||
friend class InstrumentationTest; // For GetCurrentInstrumentationLevel and ConfigureStubs.
|
||||
|
||||
DISALLOW_COPY_AND_ASSIGN(Instrumentation);
|
||||
};
|
||||
std::ostream& operator<<(std::ostream& os, const Instrumentation::InstrumentationEvent& rhs);
|
||||
std::ostream& operator<<(std::ostream& os, const Instrumentation::InstrumentationLevel& rhs);
|
||||
|
||||
// An element in the instrumentation side stack maintained in art::Thread.
|
||||
struct InstrumentationStackFrame {
|
||||
InstrumentationStackFrame(mirror::Object* this_object, ArtMethod* method,
|
||||
uintptr_t return_pc, size_t frame_id, bool interpreter_entry)
|
||||
: this_object_(this_object), method_(method), return_pc_(return_pc), frame_id_(frame_id),
|
||||
interpreter_entry_(interpreter_entry) {
|
||||
}
|
||||
|
||||
std::string Dump() const REQUIRES_SHARED(Locks::mutator_lock_);
|
||||
|
||||
mirror::Object* this_object_;
|
||||
ArtMethod* method_;
|
||||
uintptr_t return_pc_;
|
||||
size_t frame_id_;
|
||||
bool interpreter_entry_;
|
||||
};
|
||||
|
||||
} // namespace instrumentation
|
||||
} // namespace art
|
||||
|
||||
#endif // ART_RUNTIME_INSTRUMENTATION_H_
|
||||
Loading…
Add table
Add a link
Reference in a new issue