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// Copyright 2013 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/sys_utils.h"
#include <memory>
#include "base/android/build_info.h"
#include "base/process/process_metrics.h"
#include "base/sys_info.h"
#include "base/trace_event/trace_event.h"
#include "jni/SysUtils_jni.h"
namespace base {
namespace android {
bool SysUtils::IsLowEndDeviceFromJni() {
JNIEnv* env = AttachCurrentThread();
return Java_SysUtils_isLowEndDevice(env);
}
bool SysUtils::IsCurrentlyLowMemory() {
JNIEnv* env = AttachCurrentThread();
return Java_SysUtils_isCurrentlyLowMemory(env);
}
// Logs the number of minor / major page faults to tracing (and also the time to
// collect) the metrics. Does nothing if tracing is not enabled.
static void JNI_SysUtils_LogPageFaultCountToTracing(
JNIEnv* env,
const base::android::JavaParamRef<jclass>& jcaller) {
// This is racy, but we are OK losing data, and collecting it is potentially
// expensive (reading and parsing a file).
bool enabled;
TRACE_EVENT_CATEGORY_GROUP_ENABLED("startup", &enabled);
if (!enabled)
return;
TRACE_EVENT_BEGIN2("memory", "CollectPageFaultCount", "minor", 0, "major", 0);
std::unique_ptr<base::ProcessMetrics> process_metrics(
base::ProcessMetrics::CreateProcessMetrics(
base::GetCurrentProcessHandle()));
base::PageFaultCounts counts;
process_metrics->GetPageFaultCounts(&counts);
TRACE_EVENT_END2("memory", "CollectPageFaults", "minor", counts.minor,
"major", counts.major);
}
} // namespace android
} // namespace base
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