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// Copyright 2017 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 "services/resource_coordinator/public/cpp/memory_instrumentation/client_process_impl.h"
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/containers/flat_map.h"
#include "base/strings/string_piece.h"
#include "base/synchronization/lock.h"
#include "base/task/single_thread_task_runner.h"
#include "base/trace_event/memory_dump_request_args.h"
#include "build/build_config.h"
#include "services/resource_coordinator/public/cpp/memory_instrumentation/memory_instrumentation.h"
#include "services/resource_coordinator/public/cpp/memory_instrumentation/os_metrics.h"
#include "services/resource_coordinator/public/cpp/memory_instrumentation/tracing_observer.h"
#include "services/resource_coordinator/public/mojom/memory_instrumentation/memory_instrumentation.mojom.h"
namespace memory_instrumentation {
// static
void ClientProcessImpl::CreateInstance(
mojo::PendingReceiver<mojom::ClientProcess> receiver,
mojo::PendingRemote<mojom::Coordinator> coordinator,
bool is_browser_process) {
// Intentionally disallow non-browser processes from ever holding a
// Coordinator.
if (!is_browser_process)
coordinator.reset();
static ClientProcessImpl* instance = nullptr;
if (!instance) {
instance = new ClientProcessImpl(
std::move(receiver), std::move(coordinator), is_browser_process,
/*initialize_memory_instrumentation=*/true);
} else {
NOTREACHED();
}
}
ClientProcessImpl::ClientProcessImpl(
mojo::PendingReceiver<mojom::ClientProcess> receiver,
mojo::PendingRemote<mojom::Coordinator> coordinator,
bool is_browser_process,
bool initialize_memory_instrumentation)
: receiver_(this, std::move(receiver)),
is_browser_process_(is_browser_process) {
if (initialize_memory_instrumentation) {
// Initialize the public-facing MemoryInstrumentation helper.
MemoryInstrumentation::CreateInstance(std::move(coordinator),
is_browser_process);
} else {
coordinator_.Bind(std::move(coordinator));
}
task_runner_ = base::ThreadTaskRunnerHandle::Get();
// TODO(primiano): this is a temporary workaround to tell the
// base::MemoryDumpManager that it is special and should coordinate periodic
// dumps for tracing. Remove this once the periodic dump scheduler is moved
// from base to the service. MDM should not care about being the coordinator.
base::trace_event::MemoryDumpManager::GetInstance()->Initialize(
base::BindRepeating(
&ClientProcessImpl::RequestGlobalMemoryDump_NoCallback,
base::Unretained(this)),
is_browser_process);
tracing_observer_ = std::make_unique<TracingObserver>(
base::trace_event::TraceLog::GetInstance(),
base::trace_event::MemoryDumpManager::GetInstance());
}
ClientProcessImpl::~ClientProcessImpl() = default;
void ClientProcessImpl::RequestChromeMemoryDump(
const base::trace_event::MemoryDumpRequestArgs& args,
RequestChromeMemoryDumpCallback callback) {
DCHECK(!callback.is_null());
most_recent_chrome_memory_dump_guid_ = args.dump_guid;
auto it_and_inserted =
pending_chrome_callbacks_.emplace(args.dump_guid, std::move(callback));
DCHECK(it_and_inserted.second) << "Duplicated request id " << args.dump_guid;
base::trace_event::MemoryDumpManager::GetInstance()->CreateProcessDump(
args, base::BindOnce(&ClientProcessImpl::OnChromeMemoryDumpDone,
base::Unretained(this)));
}
void ClientProcessImpl::OnChromeMemoryDumpDone(
bool success,
uint64_t dump_guid,
std::unique_ptr<base::trace_event::ProcessMemoryDump> process_memory_dump) {
DCHECK(success || !process_memory_dump);
auto callback_it = pending_chrome_callbacks_.find(dump_guid);
DCHECK(callback_it != pending_chrome_callbacks_.end());
auto callback = std::move(callback_it->second);
pending_chrome_callbacks_.erase(callback_it);
auto it = delayed_os_memory_dump_callbacks_.find(dump_guid);
if (it != delayed_os_memory_dump_callbacks_.end()) {
for (auto& args : it->second) {
PerformOSMemoryDump(std::move(args));
}
delayed_os_memory_dump_callbacks_.erase(it);
}
if (!process_memory_dump) {
DLOG(ERROR) << "Chrome dump request failed";
std::move(callback).Run(false, dump_guid, nullptr);
return;
}
std::move(callback).Run(success, dump_guid, std::move(process_memory_dump));
}
void ClientProcessImpl::RequestGlobalMemoryDump_NoCallback(
base::trace_event::MemoryDumpType dump_type,
base::trace_event::MemoryDumpLevelOfDetail level_of_detail) {
CHECK(is_browser_process_);
if (!task_runner_->RunsTasksInCurrentSequence()) {
task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&ClientProcessImpl::RequestGlobalMemoryDump_NoCallback,
base::Unretained(this), dump_type, level_of_detail));
return;
}
// NOTE: If this ClientProcessImpl was responsible for initializing the
// global MemoryInstrumentation object, its Coordinator pipe was passed along
// to that object, and |coordinator_| is unbound.
mojom::Coordinator* coordinator = nullptr;
if (coordinator_)
coordinator = coordinator_.get();
else
coordinator = MemoryInstrumentation::GetInstance()->GetCoordinator();
coordinator->RequestGlobalMemoryDumpAndAppendToTrace(
dump_type, level_of_detail,
base::trace_event::MemoryDumpDeterminism::NONE,
mojom::Coordinator::RequestGlobalMemoryDumpAndAppendToTraceCallback());
}
void ClientProcessImpl::RequestOSMemoryDump(
mojom::MemoryMapOption mmap_option,
const std::vector<base::ProcessId>& pids,
RequestOSMemoryDumpCallback callback) {
OSMemoryDumpArgs args;
args.mmap_option = mmap_option;
args.pids = pids;
args.callback = std::move(callback);
#if defined(OS_MAC)
// If the most recent chrome memory dump hasn't finished, wait for that to
// finish.
if (most_recent_chrome_memory_dump_guid_.has_value()) {
uint64_t guid = most_recent_chrome_memory_dump_guid_.value();
auto it = pending_chrome_callbacks_.find(guid);
if (it != pending_chrome_callbacks_.end()) {
delayed_os_memory_dump_callbacks_[guid].push_back(std::move(args));
return;
}
}
#endif
PerformOSMemoryDump(std::move(args));
}
void ClientProcessImpl::PerformOSMemoryDump(OSMemoryDumpArgs args) {
bool global_success = true;
base::flat_map<base::ProcessId, mojom::RawOSMemDumpPtr> results;
for (const base::ProcessId& pid : args.pids) {
mojom::RawOSMemDumpPtr result = mojom::RawOSMemDump::New();
result->platform_private_footprint = mojom::PlatformPrivateFootprint::New();
bool success = OSMetrics::FillOSMemoryDump(pid, result.get());
if (args.mmap_option != mojom::MemoryMapOption::NONE) {
success = success && OSMetrics::FillProcessMemoryMaps(
pid, args.mmap_option, result.get());
}
if (success) {
results[pid] = std::move(result);
} else {
DLOG(ERROR) << "OS memory dump failed for pid " << pid;
}
global_success = global_success && success;
}
std::move(args.callback).Run(global_success, std::move(results));
}
ClientProcessImpl::OSMemoryDumpArgs::OSMemoryDumpArgs() = default;
ClientProcessImpl::OSMemoryDumpArgs::OSMemoryDumpArgs(OSMemoryDumpArgs&&) =
default;
ClientProcessImpl::OSMemoryDumpArgs::~OSMemoryDumpArgs() = default;
} // namespace memory_instrumentation
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