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render_process_impl.cc
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render_process_impl.cc
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// Copyright (c) 2012 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/renderer/render_process_impl.h"
#include "build/build_config.h"
#if defined(OS_WIN)
#include <windows.h>
#include <objidl.h>
#include <mlang.h>
#endif
#include <stddef.h>
#include <vector>
#include "base/bind.h"
#include "base/command_line.h"
#include "base/compiler_specific.h"
#include "base/debug/crash_logging.h"
#include "base/feature_list.h"
#include "base/sys_info.h"
#include "base/task_scheduler/initialization_util.h"
#include "base/task_scheduler/scheduler_worker_pool_params.h"
#include "base/task_scheduler/task_scheduler.h"
#include "base/task_scheduler/task_traits.h"
#include "base/threading/platform_thread.h"
#include "base/time/time.h"
#include "content/child/site_isolation_stats_gatherer.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "content/public/renderer/content_renderer_client.h"
#include "third_party/WebKit/public/web/WebFrame.h"
#include "v8/include/v8.h"
#if defined(OS_WIN)
#include "base/win/win_util.h"
#endif
namespace {
enum WorkerPoolType : size_t {
BACKGROUND = 0,
BACKGROUND_FILE_IO,
FOREGROUND,
FOREGROUND_FILE_IO,
WORKER_POOL_COUNT // Always last.
};
const base::Feature kV8_ES2015_TailCalls_Feature {
"V8_ES2015_TailCalls", base::FEATURE_DISABLED_BY_DEFAULT
};
const base::Feature kV8_ES2016_ExplicitTailCalls_Feature{
"V8_ES2016_ExplicitTailCalls", base::FEATURE_DISABLED_BY_DEFAULT};
const base::Feature kV8SerializeEagerFeature{"V8_Serialize_Eager",
base::FEATURE_DISABLED_BY_DEFAULT};
const base::Feature kV8SerializeAgeCodeFeature{
"V8_Serialize_Age_Code", base::FEATURE_DISABLED_BY_DEFAULT};
void SetV8FlagIfFeature(const base::Feature& feature, const char* v8_flag) {
if (base::FeatureList::IsEnabled(feature)) {
v8::V8::SetFlagsFromString(v8_flag, strlen(v8_flag));
}
}
void SetV8FlagIfHasSwitch(const char* switch_name, const char* v8_flag) {
if (base::CommandLine::ForCurrentProcess()->HasSwitch(switch_name)) {
v8::V8::SetFlagsFromString(v8_flag, strlen(v8_flag));
}
}
std::vector<base::SchedulerWorkerPoolParams>
GetDefaultSchedulerWorkerPoolParams() {
using StandbyThreadPolicy =
base::SchedulerWorkerPoolParams::StandbyThreadPolicy;
using ThreadPriority = base::ThreadPriority;
constexpr size_t kMaxNumThreadsInBackgroundPool = 1;
constexpr size_t kMaxNumThreadsInBackgroundFileIOPool = 1;
constexpr int kMaxNumThreadsInForegroundPoolLowerBound = 2;
constexpr int kMaxNumThreadsInForegroundPoolUpperBound = 4;
constexpr double kMaxNumThreadsInForegroundPoolCoresMultiplier = 1;
constexpr int kMaxNumThreadsInForegroundPoolOffset = 0;
constexpr size_t kMaxNumThreadsInForegroundFileIOPool = 1;
constexpr auto kSuggestedReclaimTime = base::TimeDelta::FromSeconds(30);
std::vector<base::SchedulerWorkerPoolParams> params_vector;
params_vector.emplace_back("RendererBackground", ThreadPriority::BACKGROUND,
StandbyThreadPolicy::LAZY,
kMaxNumThreadsInBackgroundPool,
kSuggestedReclaimTime);
params_vector.emplace_back(
"RendererBackgroundFileIO", ThreadPriority::BACKGROUND,
StandbyThreadPolicy::LAZY, kMaxNumThreadsInBackgroundFileIOPool,
kSuggestedReclaimTime);
params_vector.emplace_back("RendererForeground", ThreadPriority::NORMAL,
StandbyThreadPolicy::LAZY,
base::RecommendedMaxNumberOfThreadsInPool(
kMaxNumThreadsInForegroundPoolLowerBound,
kMaxNumThreadsInForegroundPoolUpperBound,
kMaxNumThreadsInForegroundPoolCoresMultiplier,
kMaxNumThreadsInForegroundPoolOffset),
kSuggestedReclaimTime);
params_vector.emplace_back("RendererForegroundFileIO", ThreadPriority::NORMAL,
StandbyThreadPolicy::LAZY,
kMaxNumThreadsInForegroundFileIOPool,
kSuggestedReclaimTime);
DCHECK_EQ(WORKER_POOL_COUNT, params_vector.size());
return params_vector;
}
// Returns the worker pool index for |traits| defaulting to FOREGROUND or
// FOREGROUND_FILE_IO on any other priorities based off of worker pools defined
// in GetDefaultSchedulerWorkerPoolParams().
size_t DefaultRendererWorkerPoolIndexForTraits(const base::TaskTraits& traits) {
const bool is_background =
traits.priority() == base::TaskPriority::BACKGROUND;
if (traits.with_file_io())
return is_background ? BACKGROUND_FILE_IO : FOREGROUND_FILE_IO;
return is_background ? BACKGROUND : FOREGROUND;
}
void InitializeTaskScheduler() {
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kSingleProcess)) {
// There should already be a TaskScheduler when the renderer runs inside the
// browser process.
DCHECK(base::TaskScheduler::GetInstance());
return;
}
DCHECK(!base::TaskScheduler::GetInstance());
std::vector<base::SchedulerWorkerPoolParams> params_vector;
base::TaskScheduler::WorkerPoolIndexForTraitsCallback
index_to_traits_callback;
content::GetContentClient()->renderer()->GetTaskSchedulerInitializationParams(
¶ms_vector, &index_to_traits_callback);
if (params_vector.empty()) {
params_vector = GetDefaultSchedulerWorkerPoolParams();
index_to_traits_callback =
base::Bind(&DefaultRendererWorkerPoolIndexForTraits);
}
DCHECK(index_to_traits_callback);
base::TaskScheduler::CreateAndSetDefaultTaskScheduler(
params_vector, index_to_traits_callback);
}
} // namespace
namespace content {
RenderProcessImpl::RenderProcessImpl()
: enabled_bindings_(0) {
#if defined(OS_WIN)
// Record whether the machine is domain joined in a crash key. This will be
// used to better identify whether crashes are from enterprise users.
// Note that this is done very early on so that crashes have the highest
// chance of getting tagged.
base::debug::SetCrashKeyValue("enrolled-to-domain",
base::win::IsEnrolledToDomain() ? "yes" : "no");
// HACK: See http://b/issue?id=1024307 for rationale.
if (GetModuleHandle(L"LPK.DLL") == NULL) {
// Makes sure lpk.dll is loaded by gdi32 to make sure ExtTextOut() works
// when buffering into a EMF buffer for printing.
typedef BOOL (__stdcall *GdiInitializeLanguagePack)(int LoadedShapingDLLs);
GdiInitializeLanguagePack gdi_init_lpk =
reinterpret_cast<GdiInitializeLanguagePack>(GetProcAddress(
GetModuleHandle(L"GDI32.DLL"),
"GdiInitializeLanguagePack"));
DCHECK(gdi_init_lpk);
if (gdi_init_lpk) {
gdi_init_lpk(0);
}
}
#endif
if (base::SysInfo::IsLowEndDevice()) {
std::string optimize_flag("--optimize-for-size");
v8::V8::SetFlagsFromString(optimize_flag.c_str(),
static_cast<int>(optimize_flag.size()));
}
SetV8FlagIfFeature(kV8_ES2015_TailCalls_Feature, "--harmony-tailcalls");
SetV8FlagIfFeature(kV8_ES2016_ExplicitTailCalls_Feature,
"--harmony-explicit-tailcalls");
SetV8FlagIfFeature(kV8SerializeEagerFeature, "--serialize_eager");
SetV8FlagIfFeature(kV8SerializeAgeCodeFeature, "--serialize_age_code");
SetV8FlagIfHasSwitch(switches::kDisableJavaScriptHarmonyShipping,
"--noharmony-shipping");
SetV8FlagIfHasSwitch(switches::kJavaScriptHarmony, "--harmony");
SetV8FlagIfFeature(features::kAsmJsToWebAssembly, "--validate-asm");
SetV8FlagIfFeature(features::kWebAssembly, "--expose-wasm");
SetV8FlagIfFeature(features::kSharedArrayBuffer,
"--harmony-sharedarraybuffer");
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
if (command_line.HasSwitch(switches::kJavaScriptFlags)) {
std::string flags(
command_line.GetSwitchValueASCII(switches::kJavaScriptFlags));
v8::V8::SetFlagsFromString(flags.c_str(), static_cast<int>(flags.size()));
}
SiteIsolationStatsGatherer::SetEnabled(
GetContentClient()->renderer()->ShouldGatherSiteIsolationStats());
InitializeTaskScheduler();
}
RenderProcessImpl::~RenderProcessImpl() {
#ifndef NDEBUG
int count = blink::WebFrame::instanceCount();
if (count)
DLOG(ERROR) << "WebFrame LEAKED " << count << " TIMES";
#endif
if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kSingleProcess)) {
DCHECK(base::TaskScheduler::GetInstance());
base::TaskScheduler::GetInstance()->Shutdown();
}
GetShutDownEvent()->Signal();
}
void RenderProcessImpl::AddBindings(int bindings) {
enabled_bindings_ |= bindings;
}
int RenderProcessImpl::GetEnabledBindings() const {
return enabled_bindings_;
}
} // namespace content