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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <jni.h>
#include "base/android/jni_android.h"
#include "base/process/process_metrics.h"
#include "base/sys_utils_jni/SysUtils_jni.h"
#include "base/trace_event/trace_event.h"
namespace base {
namespace android {
// 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) {
// 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);
}
int GetCachedLowMemoryDeviceThresholdMb() {
JNIEnv* env = AttachCurrentThread();
return static_cast<int>(Java_SysUtils_getLowMemoryDeviceThresholdMb(env));
}
} // namespace android
} // namespace base
DEFINE_JNI(SysUtils)
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