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