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// Copyright 2014 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 "content/browser/service_worker/service_worker_process_manager.h"
#include <stddef.h>
#include <algorithm>
#include <utility>
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/service_worker/service_worker_context_wrapper.h"
#include "content/browser/site_instance_impl.h"
#include "content/browser/storage_partition_impl.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/site_instance.h"
#include "content/public/common/browser_side_navigation_policy.h"
#include "content/public/common/child_process_host.h"
#include "url/gurl.h"
namespace content {
ServiceWorkerProcessManager::ServiceWorkerProcessManager(
BrowserContext* browser_context)
: browser_context_(browser_context),
storage_partition_(nullptr),
process_id_for_test_(ChildProcessHost::kInvalidUniqueID),
new_process_id_for_test_(ChildProcessHost::kInvalidUniqueID),
weak_this_factory_(this) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
weak_this_ = weak_this_factory_.GetWeakPtr();
}
ServiceWorkerProcessManager::~ServiceWorkerProcessManager() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK(IsShutdown())
<< "Call Shutdown() before destroying |this|, so that racing method "
<< "invocations don't use a destroyed BrowserContext.";
// TODO(horo): Remove after collecting crash data.
// Temporary checks to verify that ServiceWorkerProcessManager doesn't prevent
// render process hosts from shutting down: crbug.com/639193
CHECK(worker_process_map_.empty());
}
BrowserContext* ServiceWorkerProcessManager::browser_context() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// This is safe because reading |browser_context_| on the UI thread doesn't
// need locking (while modifying does).
return browser_context_;
}
void ServiceWorkerProcessManager::Shutdown() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
{
base::AutoLock lock(browser_context_lock_);
browser_context_ = nullptr;
}
// In single-process mode, Shutdown() is called when deleting the default
// browser context, which is itself destroyed after the RenderProcessHost.
// The refcount decrement can be skipped anyway since there's only one
// process.
if (!RenderProcessHost::run_renderer_in_process()) {
for (const auto& it : worker_process_map_) {
if (it.second->HasProcess()) {
RenderProcessHost* process = it.second->GetProcess();
if (!process->IsKeepAliveRefCountDisabled())
process->DecrementKeepAliveRefCount();
}
}
}
worker_process_map_.clear();
}
bool ServiceWorkerProcessManager::IsShutdown() {
base::AutoLock lock(browser_context_lock_);
return !browser_context_;
}
ServiceWorkerStatusCode ServiceWorkerProcessManager::AllocateWorkerProcess(
int embedded_worker_id,
const GURL& pattern,
const GURL& script_url,
bool can_use_existing_process,
AllocatedProcessInfo* out_info) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
out_info->process_id = ChildProcessHost::kInvalidUniqueID;
out_info->start_situation = ServiceWorkerMetrics::StartSituation::UNKNOWN;
if (process_id_for_test_ != ChildProcessHost::kInvalidUniqueID) {
// Let tests specify the returned process ID.
int result = can_use_existing_process ? process_id_for_test_
: new_process_id_for_test_;
out_info->process_id = result;
out_info->start_situation =
ServiceWorkerMetrics::StartSituation::EXISTING_READY_PROCESS;
return SERVICE_WORKER_OK;
}
if (IsShutdown()) {
return SERVICE_WORKER_ERROR_ABORT;
}
DCHECK(!base::ContainsKey(worker_process_map_, embedded_worker_id))
<< embedded_worker_id << " already has a process allocated";
// Create a SiteInstance to get the renderer process from. Use the site URL
// from the StoragePartition in case this StoragePartition is for guests
// (e.g., <webview>).
bool use_url_from_storage_partition =
storage_partition_ &&
!storage_partition_->site_for_service_worker().is_empty();
scoped_refptr<SiteInstanceImpl> site_instance =
SiteInstanceImpl::CreateForURL(
browser_context_, use_url_from_storage_partition
? storage_partition_->site_for_service_worker()
: script_url);
site_instance->set_is_for_service_worker();
// Attempt to reuse a renderer process if possible. Note that in the
// <webview> case, process reuse isn't currently supported and a new
// process will always be created (https://crbug.com/752667).
DCHECK(site_instance->process_reuse_policy() ==
SiteInstanceImpl::ProcessReusePolicy::DEFAULT ||
site_instance->process_reuse_policy() ==
SiteInstanceImpl::ProcessReusePolicy::PROCESS_PER_SITE);
if (can_use_existing_process) {
site_instance->set_process_reuse_policy(
SiteInstanceImpl::ProcessReusePolicy::REUSE_PENDING_OR_COMMITTED_SITE);
}
// Get the process from the SiteInstance.
RenderProcessHost* rph = site_instance->GetProcess();
DCHECK(!storage_partition_ ||
rph->InSameStoragePartition(storage_partition_));
ServiceWorkerMetrics::StartSituation start_situation;
if (!rph->HasConnection()) {
// HasConnection() is false means that Init() has not been called or the
// process has been killed.
start_situation = ServiceWorkerMetrics::StartSituation::NEW_PROCESS;
} else if (!rph->IsReady()) {
start_situation =
ServiceWorkerMetrics::StartSituation::EXISTING_UNREADY_PROCESS;
} else {
start_situation =
ServiceWorkerMetrics::StartSituation::EXISTING_READY_PROCESS;
}
if (!rph->Init()) {
LOG(ERROR) << "Couldn't start a new process!";
return SERVICE_WORKER_ERROR_PROCESS_NOT_FOUND;
}
worker_process_map_.emplace(embedded_worker_id, std::move(site_instance));
if (!rph->IsKeepAliveRefCountDisabled())
rph->IncrementKeepAliveRefCount();
out_info->process_id = rph->GetID();
out_info->start_situation = start_situation;
return SERVICE_WORKER_OK;
}
void ServiceWorkerProcessManager::ReleaseWorkerProcess(int embedded_worker_id) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (process_id_for_test_ != ChildProcessHost::kInvalidUniqueID) {
// Unittests don't increment or decrement the worker refcount of a
// RenderProcessHost.
return;
}
if (IsShutdown()) {
// Shutdown already released all instances.
DCHECK(worker_process_map_.empty());
return;
}
auto it = worker_process_map_.find(embedded_worker_id);
// ReleaseWorkerProcess could be called for a nonexistent worker id, for
// example, when request to start a worker is aborted on the IO thread during
// process allocation that is failed on the UI thread.
if (it == worker_process_map_.end())
return;
if (it->second->HasProcess()) {
RenderProcessHost* process = it->second->GetProcess();
if (!process->IsKeepAliveRefCountDisabled())
process->DecrementKeepAliveRefCount();
}
worker_process_map_.erase(it);
}
} // namespace content
namespace std {
// Destroying ServiceWorkerProcessManagers only on the UI thread allows the
// member WeakPtr to safely guard the object's lifetime when used on that
// thread.
void default_delete<content::ServiceWorkerProcessManager>::operator()(
content::ServiceWorkerProcessManager* ptr) const {
content::BrowserThread::DeleteSoon(
content::BrowserThread::UI, FROM_HERE, ptr);
}
} // namespace std
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