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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/android/trace_event_binding.h"
#include <jni.h>
#include <set>
#include "base/android/jni_string.h"
#include "base/lazy_instance.h"
#include "base/macros.h"
#include "base/trace_event/trace_event.h"
#include "base/trace_event/trace_event_impl.h"
#include "jni/TraceEvent_jni.h"
namespace base {
namespace android {
namespace {
const char kJavaCategory[] = "Java";
const char kToplevelCategory[] = "toplevel";
const char kLooperDispatchMessage[] = "Looper.dispatchMessage";
// Boilerplate for safely converting Java data to TRACE_EVENT data.
class TraceEventDataConverter {
public:
TraceEventDataConverter(JNIEnv* env, jstring jname, jstring jarg)
: env_(env),
jname_(jname),
jarg_(jarg),
name_(ConvertJavaStringToUTF8(env, jname)),
has_arg_(jarg != nullptr),
arg_(jarg ? ConvertJavaStringToUTF8(env, jarg) : "") {}
~TraceEventDataConverter() {
}
// Return saves values to pass to TRACE_EVENT macros.
const char* name() { return name_.c_str(); }
const char* arg_name() { return has_arg_ ? "arg" : nullptr; }
const char* arg() { return has_arg_ ? arg_.c_str() : nullptr; }
private:
JNIEnv* env_;
jstring jname_;
jstring jarg_;
std::string name_;
bool has_arg_;
std::string arg_;
DISALLOW_COPY_AND_ASSIGN(TraceEventDataConverter);
};
class TraceEnabledObserver
: public trace_event::TraceLog::EnabledStateObserver {
public:
void OnTraceLogEnabled() override {
JNIEnv* env = base::android::AttachCurrentThread();
base::android::Java_TraceEvent_setEnabled(env, true);
}
void OnTraceLogDisabled() override {
JNIEnv* env = base::android::AttachCurrentThread();
base::android::Java_TraceEvent_setEnabled(env, false);
}
};
base::LazyInstance<TraceEnabledObserver>::Leaky g_trace_enabled_state_observer_;
} // namespace
static void RegisterEnabledObserver(JNIEnv* env,
const JavaParamRef<jclass>& clazz) {
bool enabled = trace_event::TraceLog::GetInstance()->IsEnabled();
base::android::Java_TraceEvent_setEnabled(env, enabled);
trace_event::TraceLog::GetInstance()->AddEnabledStateObserver(
g_trace_enabled_state_observer_.Pointer());
}
static void StartATrace(JNIEnv* env, const JavaParamRef<jclass>& clazz) {
base::trace_event::TraceLog::GetInstance()->StartATrace();
}
static void StopATrace(JNIEnv* env, const JavaParamRef<jclass>& clazz) {
base::trace_event::TraceLog::GetInstance()->StopATrace();
}
static void Instant(JNIEnv* env,
const JavaParamRef<jclass>& clazz,
const JavaParamRef<jstring>& jname,
const JavaParamRef<jstring>& jarg) {
TraceEventDataConverter converter(env, jname, jarg);
if (converter.arg()) {
TRACE_EVENT_COPY_INSTANT1(kJavaCategory, converter.name(),
TRACE_EVENT_SCOPE_THREAD,
converter.arg_name(), converter.arg());
} else {
TRACE_EVENT_COPY_INSTANT0(kJavaCategory, converter.name(),
TRACE_EVENT_SCOPE_THREAD);
}
}
static void Begin(JNIEnv* env,
const JavaParamRef<jclass>& clazz,
const JavaParamRef<jstring>& jname,
const JavaParamRef<jstring>& jarg) {
TraceEventDataConverter converter(env, jname, jarg);
if (converter.arg()) {
TRACE_EVENT_COPY_BEGIN1(kJavaCategory, converter.name(),
converter.arg_name(), converter.arg());
} else {
TRACE_EVENT_COPY_BEGIN0(kJavaCategory, converter.name());
}
}
static void End(JNIEnv* env,
const JavaParamRef<jclass>& clazz,
const JavaParamRef<jstring>& jname,
const JavaParamRef<jstring>& jarg) {
TraceEventDataConverter converter(env, jname, jarg);
if (converter.arg()) {
TRACE_EVENT_COPY_END1(kJavaCategory, converter.name(),
converter.arg_name(), converter.arg());
} else {
TRACE_EVENT_COPY_END0(kJavaCategory, converter.name());
}
}
static void BeginToplevel(JNIEnv* env, const JavaParamRef<jclass>& clazz) {
TRACE_EVENT_BEGIN0(kToplevelCategory, kLooperDispatchMessage);
}
static void EndToplevel(JNIEnv* env, const JavaParamRef<jclass>& clazz) {
TRACE_EVENT_END0(kToplevelCategory, kLooperDispatchMessage);
}
static void StartAsync(JNIEnv* env,
const JavaParamRef<jclass>& clazz,
const JavaParamRef<jstring>& jname,
jlong jid) {
TraceEventDataConverter converter(env, jname, nullptr);
TRACE_EVENT_COPY_ASYNC_BEGIN0(kJavaCategory, converter.name(), jid);
}
static void FinishAsync(JNIEnv* env,
const JavaParamRef<jclass>& clazz,
const JavaParamRef<jstring>& jname,
jlong jid) {
TraceEventDataConverter converter(env, jname, nullptr);
TRACE_EVENT_COPY_ASYNC_END0(kJavaCategory, converter.name(), jid);
}
bool RegisterTraceEvent(JNIEnv* env) {
return RegisterNativesImpl(env);
}
} // namespace android
} // namespace base
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