1 files changed, 169 insertions, 0 deletions
diff --git a/chromium/base/android/trace_event_binding.cc b/chromium/base/android/trace_event_binding.cc
new file mode 100644
index 00000000000..e261411f08b
--- /dev/null
+++ b/chromium/base/android/trace_event_binding.cc
@@ -0,0 +1,169 @@
+// 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/debug/trace_event.h"
+#include "base/debug/trace_event_impl.h"
+#include "base/lazy_instance.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_(env->GetStringUTFChars(jname, NULL)),
+        arg_(jarg ? env->GetStringUTFChars(jarg, NULL) : NULL) {
+  }
+  ~TraceEventDataConverter() {
+    env_->ReleaseStringUTFChars(jname_, name_);
+    if (jarg_)
+      env_->ReleaseStringUTFChars(jarg_, arg_);
+  }
+
+  // Return saves values to pass to TRACE_EVENT macros.
+  const char* name() { return name_; }
+  const char* arg_name() { return arg_ ? "arg" : NULL; }
+  const char* arg() { return arg_; }
+
+ private:
+  JNIEnv* env_;
+  jstring jname_;
+  jstring jarg_;
+  const char* name_;
+  const char* arg_;
+
+  DISALLOW_COPY_AND_ASSIGN(TraceEventDataConverter);
+};
+
+class TraceEnabledObserver : public debug::TraceLog::EnabledStateObserver {
+  public:
+    virtual void OnTraceLogEnabled() OVERRIDE {
+      JNIEnv* env = base::android::AttachCurrentThread();
+      base::android::Java_TraceEvent_setEnabled(env, true);
+    }
+    virtual 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, jclass clazz) {
+  bool enabled = debug::TraceLog::GetInstance()->IsEnabled();
+  base::android::Java_TraceEvent_setEnabled(env, enabled);
+  debug::TraceLog::GetInstance()->AddEnabledStateObserver(
+      g_trace_enabled_state_observer_.Pointer());
+}
+
+static void StartATrace(JNIEnv* env, jclass clazz) {
+  base::debug::TraceLog::GetInstance()->StartATrace();
+}
+
+static void StopATrace(JNIEnv* env, jclass clazz) {
+  base::debug::TraceLog::GetInstance()->StopATrace();
+}
+
+static void Instant(JNIEnv* env, jclass clazz,
+                    jstring jname, 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, jclass clazz,
+                  jstring jname, 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, jclass clazz,
+                jstring jname, 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, jclass clazz) {
+  TRACE_EVENT_BEGIN0(kToplevelCategory, kLooperDispatchMessage);
+}
+
+static void EndToplevel(JNIEnv* env, jclass clazz) {
+  TRACE_EVENT_END0(kToplevelCategory, kLooperDispatchMessage);
+}
+
+static void StartAsync(JNIEnv* env, jclass clazz,
+                       jstring jname, jlong jid, jstring jarg) {
+  TraceEventDataConverter converter(env, jname, jarg);
+  if (converter.arg()) {
+    TRACE_EVENT_COPY_ASYNC_BEGIN1(kJavaCategory,
+                                  converter.name(),
+                                  jid,
+                                  converter.arg_name(),
+                                  converter.arg());
+  } else {
+    TRACE_EVENT_COPY_ASYNC_BEGIN0(kJavaCategory,
+                                  converter.name(),
+                                  jid);
+  }
+}
+
+static void FinishAsync(JNIEnv* env, jclass clazz,
+                        jstring jname, jlong jid, jstring jarg) {
+  TraceEventDataConverter converter(env, jname, jarg);
+  if (converter.arg()) {
+    TRACE_EVENT_COPY_ASYNC_END1(kJavaCategory,
+                                converter.name(),
+                                jid,
+                                converter.arg_name(),
+                                converter.arg());
+  } else {
+    TRACE_EVENT_COPY_ASYNC_END0(kJavaCategory,
+                                converter.name(),
+                                jid);
+  }
+}
+
+bool RegisterTraceEvent(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace android
+}  // namespace base