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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/controller/oom_intervention_impl.h"
#include <algorithm>
#include <memory>
#include <utility>
#include "base/debug/crash_logging.h"
#include "base/functional/bind.h"
#include "base/metrics/histogram_functions.h"
#include "base/metrics/histogram_macros.h"
#include "base/task/single_thread_task_runner.h"
#include "mojo/public/cpp/bindings/self_owned_receiver.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_gc_for_context_dispose.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/loader/frame_load_request.h"
#include "third_party/blink/renderer/core/page/page.h"
#include "third_party/blink/renderer/platform/scheduler/public/main_thread.h"
#include "third_party/blink/renderer/platform/scheduler/public/main_thread_scheduler.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
namespace blink {
namespace {
base::debug::CrashKeyString* GetStateCrashKey() {
static auto* crash_key = base::debug::AllocateCrashKeyString(
"oom_intervention_state", base::debug::CrashKeySize::Size32);
return crash_key;
}
void NavigateLocalAdsFrames(LocalFrame* frame) {
// This navigates all the frames detected as an advertisement to about:blank.
DCHECK(frame);
for (Frame* child = frame->Tree().FirstChild(); child;
child = child->Tree().TraverseNext(frame)) {
if (auto* child_local_frame = DynamicTo<LocalFrame>(child)) {
if (child_local_frame->IsAdFrame()) {
FrameLoadRequest request(frame->DomWindow(),
ResourceRequest(BlankURL()));
child_local_frame->Navigate(request, WebFrameLoadType::kStandard);
}
}
// TODO(yuzus): Once AdsTracker for remote frames is implemented and OOPIF
// is enabled on low-end devices, navigate remote ads as well.
}
}
} // namespace
// static
void OomInterventionImpl::BindReceiver(
scoped_refptr<base::SingleThreadTaskRunner> task_runner,
mojo::PendingReceiver<mojom::blink::OomIntervention> receiver) {
mojo::MakeSelfOwnedReceiver(
std::make_unique<OomInterventionImpl>(
base::PassKey<OomInterventionImpl>(), task_runner),
std::move(receiver), task_runner);
}
OomInterventionImpl::OomInterventionImpl(
base::PassKey<OomInterventionImpl> pass_key,
scoped_refptr<base::SingleThreadTaskRunner> task_runner)
: OomInterventionImpl(std::move(task_runner)) {}
OomInterventionImpl::OomInterventionImpl(
scoped_refptr<base::SingleThreadTaskRunner> task_runner)
: task_runner_(std::move(task_runner)) {
static bool initial_crash_key_set = false;
if (!initial_crash_key_set) {
initial_crash_key_set = true;
base::debug::SetCrashKeyString(GetStateCrashKey(), "before");
}
}
OomInterventionImpl::~OomInterventionImpl() {
MemoryUsageMonitorInstance().RemoveObserver(this);
}
void OomInterventionImpl::StartDetection(
mojo::PendingRemote<mojom::blink::OomInterventionHost> host,
mojom::blink::DetectionArgsPtr detection_args,
bool renderer_pause_enabled,
bool navigate_ads_enabled,
bool purge_v8_memory_enabled) {
host_.Bind(std::move(host));
detection_args_ = std::move(detection_args);
renderer_pause_enabled_ = renderer_pause_enabled;
navigate_ads_enabled_ = navigate_ads_enabled;
purge_v8_memory_enabled_ = purge_v8_memory_enabled;
MemoryUsageMonitorInstance().AddObserver(this);
}
MemoryUsageMonitor& OomInterventionImpl::MemoryUsageMonitorInstance() {
return MemoryUsageMonitor::Instance();
}
void OomInterventionImpl::OnMemoryPing(MemoryUsage usage) {
// Ignore pings without process memory usage information.
if (std::isnan(usage.private_footprint_bytes) ||
std::isnan(usage.swap_bytes) || std::isnan(usage.vm_size_bytes))
return;
Check(usage);
}
void OomInterventionImpl::Check(MemoryUsage usage) {
DCHECK(host_);
bool oom_detected = false;
oom_detected |= detection_args_->private_footprint_threshold > 0 &&
usage.private_footprint_bytes >
detection_args_->private_footprint_threshold;
if (oom_detected) {
base::debug::SetCrashKeyString(GetStateCrashKey(), "during");
if (navigate_ads_enabled_ || purge_v8_memory_enabled_) {
for (const auto& page : Page::OrdinaryPages()) {
for (Frame* frame = page->MainFrame(); frame;
frame = frame->Tree().TraverseNext()) {
auto* local_frame = DynamicTo<LocalFrame>(frame);
if (!local_frame)
continue;
if (navigate_ads_enabled_)
NavigateLocalAdsFrames(local_frame);
if (purge_v8_memory_enabled_)
local_frame->ForciblyPurgeV8Memory();
}
}
}
if (renderer_pause_enabled_) {
// The ScopedPagePauser is destroyed when the intervention is declined and
// mojo strong binding is disconnected.
pauser_ = std::make_unique<ScopedPagePauser>();
}
host_->OnHighMemoryUsage();
MemoryUsageMonitorInstance().RemoveObserver(this);
// Send memory pressure notification to trigger GC.
task_runner_->PostTask(FROM_HERE, WTF::BindOnce(&TriggerGC));
// Notify V8GCForContextDispose that page navigation gc is needed when
// intervention runs, as it indicates that memory usage is high.
V8GCForContextDispose::Instance().SetForcePageNavigationGC();
}
}
void OomInterventionImpl::TriggerGC() {
Thread::MainThread()
->Scheduler()
->ToMainThreadScheduler()
->ForEachMainThreadIsolate(WTF::BindRepeating([](v8::Isolate* isolate) {
isolate->MemoryPressureNotification(v8::MemoryPressureLevel::kCritical);
}));
}
} // namespace blink
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