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// Copyright 2023 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/performance_manager/public/resource_attribution/memory_measurement_delegate.h"
#include <utility>
#include "base/check.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/no_destructor.h"
#include "base/notreached.h"
#include "base/process/process_handle.h"
#include "components/performance_manager/graph/graph_impl.h"
#include "components/performance_manager/graph/process_node_impl.h"
#include "components/performance_manager/public/resource_attribution/process_context.h"
#include "components/performance_manager/resource_attribution/performance_manager_aliases.h"
#include "components/performance_manager/resource_attribution/query_scheduler.h"
#include "services/resource_coordinator/public/cpp/memory_instrumentation/global_memory_dump.h"
#include "services/resource_coordinator/public/cpp/memory_instrumentation/memory_instrumentation.h"
namespace resource_attribution {
namespace {
using GlobalMemoryDump = memory_instrumentation::GlobalMemoryDump;
// A production MemoryMeasurementDelegate that measures processes with
// memory_instrumentation::MemoryInstrumentation.
class MemoryMeasurementDelegateImpl final : public MemoryMeasurementDelegate {
public:
explicit MemoryMeasurementDelegateImpl(Graph* graph)
: graph_impl_(GraphImpl::FromGraph(graph)) {}
~MemoryMeasurementDelegateImpl() final = default;
MemoryMeasurementDelegateImpl(const MemoryMeasurementDelegateImpl&) = delete;
MemoryMeasurementDelegateImpl& operator=(
const MemoryMeasurementDelegateImpl&) = delete;
void RequestMemorySummary(
base::OnceCallback<void(MemorySummaryMap)> callback) final;
private:
void OnMemorySummary(base::OnceCallback<void(MemorySummaryMap)> callback,
bool success,
std::unique_ptr<GlobalMemoryDump> memory_dump);
raw_ptr<GraphImpl> graph_impl_;
base::WeakPtrFactory<MemoryMeasurementDelegateImpl> weak_factory_{this};
};
void MemoryMeasurementDelegateImpl::RequestMemorySummary(
base::OnceCallback<void(MemorySummaryMap)> callback) {
auto* mem_instrumentation =
memory_instrumentation::MemoryInstrumentation::GetInstance();
// The memory instrumentation service is not available in unit tests unless
// explicitly created.
if (!mem_instrumentation) {
std::move(callback).Run({});
return;
}
// TODO(crbug.com/40926264): Pass a set of processes to measure instead of
// all?
mem_instrumentation->RequestPrivateMemoryFootprint(
base::kNullProcessId,
base::BindOnce(&MemoryMeasurementDelegateImpl::OnMemorySummary,
weak_factory_.GetWeakPtr(), std::move(callback)));
}
void MemoryMeasurementDelegateImpl::OnMemorySummary(
base::OnceCallback<void(MemorySummaryMap)> callback,
bool success,
std::unique_ptr<GlobalMemoryDump> memory_dump) {
if (!success) {
std::move(callback).Run({});
return;
}
MemorySummaryMap results;
CHECK(memory_dump);
for (const auto& process_dump : memory_dump->process_dumps()) {
ProcessNodeImpl* process_node =
graph_impl_->GetProcessNodeByPid(process_dump.pid());
if (!process_node) {
// TODO(crbug.com/40926264): Save ProcessContext by PID when the request
// starts, so that ProcessNode's deleted before the result task runs can
// be measured?
continue;
}
results.emplace(
ProcessContext::FromProcessNode(process_node),
MemorySummaryMeasurement{
.resident_set_size_kb = process_dump.os_dump().resident_set_kb,
.private_footprint_kb = process_dump.os_dump().private_footprint_kb,
});
}
std::move(callback).Run(std::move(results));
}
// The default production factory for MemoryMeasurementDelegateImpl objects.
class MemoryMeasurementDelegateFactoryImpl final
: public MemoryMeasurementDelegate::Factory {
public:
MemoryMeasurementDelegateFactoryImpl() = default;
~MemoryMeasurementDelegateFactoryImpl() final = default;
std::unique_ptr<MemoryMeasurementDelegate> CreateDelegate(
Graph* graph) final {
return std::make_unique<MemoryMeasurementDelegateImpl>(graph);
}
};
} // namespace
// static
void MemoryMeasurementDelegate::SetDelegateFactoryForTesting(Graph* graph,
Factory* factory) {
auto* scheduler = internal::QueryScheduler::GetFromGraph(graph);
CHECK(scheduler);
scheduler
->GetMemoryProviderForTesting() // IN-TEST
.SetDelegateFactoryForTesting(factory ? factory // IN-TEST
: GetDefaultFactory());
}
// static
MemoryMeasurementDelegate::Factory*
MemoryMeasurementDelegate::GetDefaultFactory() {
static base::NoDestructor<MemoryMeasurementDelegateFactoryImpl>
default_factory;
return default_factory.get();
}
} // namespace resource_attribution
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