/*
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* Copyright (C) 2018 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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#include "gc/scoped_gc_critical_section.h"
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#include "instrumentation.h"
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#include "runtime.h"
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#include "runtime_callbacks.h"
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#include "scoped_thread_state_change-inl.h"
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#include "thread-inl.h"
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#include "thread_list.h"
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namespace tracefast {
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#if ((!defined(TRACEFAST_INTERPRETER) && !defined(TRACEFAST_TRAMPOLINE)) || \
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(defined(TRACEFAST_INTERPRETER) && defined(TRACEFAST_TRAMPOLINE)))
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#error Must set one of TRACEFAST_TRAMPOLINE or TRACEFAST_INTERPRETER during build
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#endif
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#ifdef TRACEFAST_INTERPRETER
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static constexpr const char* kTracerInstrumentationKey = "tracefast_INTERPRETER";
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static constexpr bool kNeedsInterpreter = true;
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#else // defined(TRACEFAST_TRAMPOLINE)
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static constexpr const char* kTracerInstrumentationKey = "tracefast_TRAMPOLINE";
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static constexpr bool kNeedsInterpreter = false;
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#endif // TRACEFAST_INITERPRETER
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class Tracer final : public art::instrumentation::InstrumentationListener {
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public:
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Tracer() {}
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void MethodEntered(art::Thread* thread ATTRIBUTE_UNUSED,
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art::Handle<art::mirror::Object> this_object ATTRIBUTE_UNUSED,
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art::ArtMethod* method ATTRIBUTE_UNUSED,
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uint32_t dex_pc ATTRIBUTE_UNUSED)
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override REQUIRES_SHARED(art::Locks::mutator_lock_) { }
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void MethodExited(art::Thread* thread ATTRIBUTE_UNUSED,
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art::Handle<art::mirror::Object> this_object ATTRIBUTE_UNUSED,
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art::ArtMethod* method ATTRIBUTE_UNUSED,
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uint32_t dex_pc ATTRIBUTE_UNUSED,
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art::Handle<art::mirror::Object> return_value ATTRIBUTE_UNUSED)
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override REQUIRES_SHARED(art::Locks::mutator_lock_) { }
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void MethodExited(art::Thread* thread ATTRIBUTE_UNUSED,
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art::Handle<art::mirror::Object> this_object ATTRIBUTE_UNUSED,
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art::ArtMethod* method ATTRIBUTE_UNUSED,
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uint32_t dex_pc ATTRIBUTE_UNUSED,
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const art::JValue& return_value ATTRIBUTE_UNUSED)
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override REQUIRES_SHARED(art::Locks::mutator_lock_) { }
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void MethodUnwind(art::Thread* thread ATTRIBUTE_UNUSED,
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art::Handle<art::mirror::Object> this_object ATTRIBUTE_UNUSED,
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art::ArtMethod* method ATTRIBUTE_UNUSED,
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uint32_t dex_pc ATTRIBUTE_UNUSED)
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override REQUIRES_SHARED(art::Locks::mutator_lock_) { }
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void DexPcMoved(art::Thread* thread ATTRIBUTE_UNUSED,
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art::Handle<art::mirror::Object> this_object ATTRIBUTE_UNUSED,
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art::ArtMethod* method ATTRIBUTE_UNUSED,
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uint32_t new_dex_pc ATTRIBUTE_UNUSED)
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override REQUIRES_SHARED(art::Locks::mutator_lock_) { }
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void FieldRead(art::Thread* thread ATTRIBUTE_UNUSED,
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art::Handle<art::mirror::Object> this_object ATTRIBUTE_UNUSED,
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art::ArtMethod* method ATTRIBUTE_UNUSED,
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uint32_t dex_pc ATTRIBUTE_UNUSED,
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art::ArtField* field ATTRIBUTE_UNUSED)
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override REQUIRES_SHARED(art::Locks::mutator_lock_) { }
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void FieldWritten(art::Thread* thread ATTRIBUTE_UNUSED,
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art::Handle<art::mirror::Object> this_object ATTRIBUTE_UNUSED,
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art::ArtMethod* method ATTRIBUTE_UNUSED,
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uint32_t dex_pc ATTRIBUTE_UNUSED,
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art::ArtField* field ATTRIBUTE_UNUSED,
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art::Handle<art::mirror::Object> field_value ATTRIBUTE_UNUSED)
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override REQUIRES_SHARED(art::Locks::mutator_lock_) { }
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void FieldWritten(art::Thread* thread ATTRIBUTE_UNUSED,
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art::Handle<art::mirror::Object> this_object ATTRIBUTE_UNUSED,
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art::ArtMethod* method ATTRIBUTE_UNUSED,
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uint32_t dex_pc ATTRIBUTE_UNUSED,
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art::ArtField* field ATTRIBUTE_UNUSED,
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const art::JValue& field_value ATTRIBUTE_UNUSED)
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override REQUIRES_SHARED(art::Locks::mutator_lock_) { }
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void ExceptionThrown(art::Thread* thread ATTRIBUTE_UNUSED,
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art::Handle<art::mirror::Throwable> exception_object ATTRIBUTE_UNUSED)
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override REQUIRES_SHARED(art::Locks::mutator_lock_) { }
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void ExceptionHandled(art::Thread* self ATTRIBUTE_UNUSED,
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art::Handle<art::mirror::Throwable> throwable ATTRIBUTE_UNUSED)
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override REQUIRES_SHARED(art::Locks::mutator_lock_) { }
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void Branch(art::Thread* thread ATTRIBUTE_UNUSED,
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art::ArtMethod* method ATTRIBUTE_UNUSED,
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uint32_t dex_pc ATTRIBUTE_UNUSED,
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int32_t dex_pc_offset ATTRIBUTE_UNUSED)
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override REQUIRES_SHARED(art::Locks::mutator_lock_) { }
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void WatchedFramePop(art::Thread* thread ATTRIBUTE_UNUSED,
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const art::ShadowFrame& frame ATTRIBUTE_UNUSED)
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override REQUIRES_SHARED(art::Locks::mutator_lock_) { }
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private:
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DISALLOW_COPY_AND_ASSIGN(Tracer);
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};
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Tracer gEmptyTracer;
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static void StartTracing() REQUIRES(!art::Locks::mutator_lock_,
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!art::Locks::thread_list_lock_,
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!art::Locks::thread_suspend_count_lock_) {
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art::Thread* self = art::Thread::Current();
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art::Runtime* runtime = art::Runtime::Current();
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art::gc::ScopedGCCriticalSection gcs(self,
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art::gc::kGcCauseInstrumentation,
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art::gc::kCollectorTypeInstrumentation);
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art::ScopedSuspendAll ssa("starting fast tracing");
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runtime->GetInstrumentation()->AddListener(&gEmptyTracer,
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art::instrumentation::Instrumentation::kMethodEntered |
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art::instrumentation::Instrumentation::kMethodExited |
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art::instrumentation::Instrumentation::kMethodUnwind);
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runtime->GetInstrumentation()->EnableMethodTracing(kTracerInstrumentationKey, kNeedsInterpreter);
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}
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class TraceFastPhaseCB : public art::RuntimePhaseCallback {
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public:
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TraceFastPhaseCB() {}
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void NextRuntimePhase(art::RuntimePhaseCallback::RuntimePhase phase)
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override REQUIRES_SHARED(art::Locks::mutator_lock_) {
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if (phase == art::RuntimePhaseCallback::RuntimePhase::kInit) {
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art::ScopedThreadSuspension sts(art::Thread::Current(),
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art::ThreadState::kWaitingForMethodTracingStart);
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StartTracing();
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}
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}
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};
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TraceFastPhaseCB gPhaseCallback;
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// The plugin initialization function.
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extern "C" bool ArtPlugin_Initialize() REQUIRES_SHARED(art::Locks::mutator_lock_) {
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art::Runtime* runtime = art::Runtime::Current();
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art::ScopedThreadSuspension stsc(art::Thread::Current(),
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art::ThreadState::kWaitingForMethodTracingStart);
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art::ScopedSuspendAll ssa("Add phase callback");
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runtime->GetRuntimeCallbacks()->AddRuntimePhaseCallback(&gPhaseCallback);
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return true;
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}
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extern "C" bool ArtPlugin_Deinitialize() {
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// Don't need to bother doing anything.
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return true;
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}
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} // namespace tracefast
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