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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/crash/content/browser/crash_memory_metrics_collector_android.h"
#include <utility>
#include "base/atomicops.h"
#include "base/compiler_specific.h"
#include "base/metrics/histogram_macros.h"
#include "base/metrics/user_metrics.h"
#include "content/public/browser/render_process_host.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/blink/public/mojom/crash/crash_memory_metrics_reporter.mojom.h"
// Keys used to attach handler to the RenderProcessHost
const void* const CrashMemoryMetricsCollector::kCrashMemoryMetricsCollectorKey =
&CrashMemoryMetricsCollector::kCrashMemoryMetricsCollectorKey;
CrashMemoryMetricsCollector*
CrashMemoryMetricsCollector::GetFromRenderProcessHost(
content::RenderProcessHost* rph) {
return static_cast<CrashMemoryMetricsCollector*>(rph->GetUserData(
CrashMemoryMetricsCollector::kCrashMemoryMetricsCollectorKey));
}
CrashMemoryMetricsCollector::CrashMemoryMetricsCollector(
content::RenderProcessHost* rph) {
// Create shared memory and pass it to the CrashMemoryMetricsReporter.
base::UnsafeSharedMemoryRegion shared_metrics_buffer =
base::UnsafeSharedMemoryRegion::Create(
sizeof(blink::OomInterventionMetrics));
metrics_mapping_ = shared_metrics_buffer.Map();
UNSAFE_TODO(memset(metrics_mapping_.memory(), 0,
sizeof(blink::OomInterventionMetrics)));
mojo::Remote<blink::mojom::CrashMemoryMetricsReporter> reporter;
rph->BindReceiver(reporter.BindNewPipeAndPassReceiver());
reporter->SetSharedMemory(shared_metrics_buffer.Duplicate());
}
CrashMemoryMetricsCollector::~CrashMemoryMetricsCollector() = default;
blink::OomInterventionMetrics CrashMemoryMetricsCollector::MemoryMetrics() {
// This should be called after SetSharedMemory.
DCHECK(metrics_mapping_.IsValid());
blink::OomInterventionMetrics memory_metrics;
base::subtle::RelaxedAtomicWriteMemcpy(
base::byte_span_from_ref(memory_metrics),
metrics_mapping_.GetMemoryAsSpan<uint8_t>());
return memory_metrics;
}
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