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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/task_manager/providers/spare_render_process_host_task_provider.h"
#include "base/functional/bind.h"
#include "base/process/process.h"
#include "chrome/browser/task_manager/providers/child_process_task.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/child_process_data.h"
#include "content/public/browser/spare_render_process_host_manager.h"
#include "content/public/common/process_type.h"
using content::BrowserThread;
using content::ChildProcessData;
using content::RenderProcessHost;
namespace task_manager {
SpareRenderProcessHostTaskProvider::SpareRenderProcessHostTaskProvider() =
default;
SpareRenderProcessHostTaskProvider::~SpareRenderProcessHostTaskProvider() =
default;
Task* SpareRenderProcessHostTaskProvider::GetTaskOfUrlRequest(int child_id,
int route_id) {
// It's called the "spare" host because it isn't yet handling requests.
return nullptr;
}
void SpareRenderProcessHostTaskProvider::StartUpdating() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK(tasks_by_rph_id_.empty());
auto& spare_manager = content::SpareRenderProcessHostManager::Get();
for (RenderProcessHost* spare_rph : spare_manager.GetSpares()) {
if (spare_rph->IsReady()) {
OnSpareRenderProcessHostReady(spare_rph);
}
}
scoped_observation_.Observe(&spare_manager);
}
void SpareRenderProcessHostTaskProvider::StopUpdating() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
scoped_observation_.Reset();
// Destroy all tasks.
tasks_by_rph_id_.clear();
}
void SpareRenderProcessHostTaskProvider::OnSpareRenderProcessHostReady(
RenderProcessHost* host) {
ChildProcessData data(content::PROCESS_TYPE_RENDERER, host->GetID());
data.SetProcess(host->GetProcess().Duplicate());
auto task = std::make_unique<ChildProcessTask>(
data, ChildProcessTask::ProcessSubtype::kSpareRenderProcess);
auto [it, inserted] =
tasks_by_rph_id_.emplace(host->GetDeprecatedID(), std::move(task));
CHECK(inserted);
NotifyObserverTaskAdded(it->second.get());
}
void SpareRenderProcessHostTaskProvider::OnSpareRenderProcessHostRemoved(
RenderProcessHost* host) {
auto it = tasks_by_rph_id_.find(host->GetDeprecatedID());
if (it == tasks_by_rph_id_.end()) {
// This can happen when a spare RenderProcessHost was created but never
// reached the "ready" state.
return;
}
NotifyObserverTaskRemoved(it->second.get());
tasks_by_rph_id_.erase(it);
}
} // namespace task_manager
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