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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 <algorithm>
#include <utility>
#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/memory/ptr_util.h"
#include "base/sys_info.h"
#include "base/task_scheduler/initialization_util.h"
#include "base/time/time.h"
#include "content/child/site_isolation_stats_gatherer.h"
#include "content/public/common/bindings_policy.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 {
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 SetV8FlagIfNotFeature(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::unique_ptr<base::TaskScheduler::InitParams>
GetDefaultTaskSchedulerInitParams() {
using StandbyThreadPolicy =
base::SchedulerWorkerPoolParams::StandbyThreadPolicy;
constexpr int kMaxNumThreadsInBackgroundPool = 1;
constexpr int kMaxNumThreadsInBackgroundBlockingPool = 1;
constexpr int kMaxNumThreadsInForegroundPoolLowerBound = 2;
constexpr int kMaxNumThreadsInForegroundBlockingPool = 1;
constexpr auto kSuggestedReclaimTime = base::TimeDelta::FromSeconds(30);
return base::MakeUnique<base::TaskScheduler::InitParams>(
base::SchedulerWorkerPoolParams(StandbyThreadPolicy::LAZY,
kMaxNumThreadsInBackgroundPool,
kSuggestedReclaimTime),
base::SchedulerWorkerPoolParams(StandbyThreadPolicy::LAZY,
kMaxNumThreadsInBackgroundBlockingPool,
kSuggestedReclaimTime),
base::SchedulerWorkerPoolParams(
StandbyThreadPolicy::LAZY,
std::max(kMaxNumThreadsInForegroundPoolLowerBound,
base::SysInfo::NumberOfProcessors()),
kSuggestedReclaimTime),
base::SchedulerWorkerPoolParams(StandbyThreadPolicy::LAZY,
kMaxNumThreadsInForegroundBlockingPool,
kSuggestedReclaimTime));
}
} // namespace
namespace content {
RenderProcessImpl::RenderProcessImpl(
std::unique_ptr<base::TaskScheduler::InitParams> task_scheduler_init_params)
: RenderProcess("Renderer", std::move(task_scheduler_init_params)),
enabled_bindings_(0) {
#if defined(OS_WIN)
// 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");
SetV8FlagIfNotFeature(features::kWebAssembly,
"--wasm-disable-structured-cloning");
SetV8FlagIfFeature(features::kWebAssemblyTrapHandler, "--wasm-trap-handler");
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());
if (command_line.HasSwitch(switches::kDomAutomationController))
enabled_bindings_ |= BINDINGS_POLICY_DOM_AUTOMATION;
if (command_line.HasSwitch(switches::kStatsCollectionController))
enabled_bindings_ |= BINDINGS_POLICY_STATS_COLLECTION;
}
RenderProcessImpl::~RenderProcessImpl() {
#ifndef NDEBUG
int count = blink::WebFrame::InstanceCount();
if (count)
DLOG(ERROR) << "WebFrame LEAKED " << count << " TIMES";
#endif
GetShutDownEvent()->Signal();
}
std::unique_ptr<RenderProcess> RenderProcessImpl::Create() {
auto task_scheduler_init_params =
content::GetContentClient()->renderer()->GetTaskSchedulerInitParams();
if (!task_scheduler_init_params)
task_scheduler_init_params = GetDefaultTaskSchedulerInitParams();
return base::WrapUnique(
new RenderProcessImpl(std::move(task_scheduler_init_params)));
}
void RenderProcessImpl::AddBindings(int bindings) {
enabled_bindings_ |= bindings;
}
int RenderProcessImpl::GetEnabledBindings() const {
return enabled_bindings_;
}
} // namespace content
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