blob: 2970727371cea716114fe36b9d38f169a707fb83 [file] [log] [blame]
// 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/base_switches.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/compiler_specific.h"
#include "base/debug/crash_logging.h"
#include "base/debug/stack_trace.h"
#include "base/feature_list.h"
#include "base/memory/ptr_util.h"
#include "base/sys_info.h"
#include "base/task/task_scheduler/initialization_util.h"
#include "base/time/time.h"
#include "content/common/task_scheduler.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 "services/service_manager/embedder/switches.h"
#include "third_party/blink/public/web/web_frame.h"
#include "v8/include/v8.h"
#if defined(OS_WIN)
#include "base/win/win_util.h"
#endif
namespace {
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() {
constexpr int kMaxNumThreadsInBackgroundPool = 1;
constexpr int kMaxNumThreadsInBackgroundBlockingPool = 1;
constexpr int kMaxNumThreadsInForegroundPoolLowerBound = 2;
constexpr int kMaxNumThreadsInForegroundBlockingPool = 1;
constexpr auto kSuggestedReclaimTime = base::TimeDelta::FromSeconds(30);
return std::make_unique<base::TaskScheduler::InitParams>(
base::SchedulerWorkerPoolParams(kMaxNumThreadsInBackgroundPool,
kSuggestedReclaimTime),
base::SchedulerWorkerPoolParams(kMaxNumThreadsInBackgroundBlockingPool,
kSuggestedReclaimTime),
base::SchedulerWorkerPoolParams(
std::max(
kMaxNumThreadsInForegroundPoolLowerBound,
content::GetMinThreadsInRendererTaskSchedulerForegroundPool()),
kSuggestedReclaimTime),
base::SchedulerWorkerPoolParams(kMaxNumThreadsInForegroundBlockingPool,
kSuggestedReclaimTime));
}
#if DCHECK_IS_CONFIGURABLE
void V8DcheckCallbackHandler(const char* file, int line, const char* message) {
// TODO(siggi): Set a crash key or a breadcrumb so the fact that we hit a
// V8 DCHECK gets out in the crash report.
::logging::LogMessage(file, line, logging::LOG_DCHECK).stream() << message;
}
#endif // DCHECK_IS_CONFIGURABLE
} // 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 DCHECK_IS_CONFIGURABLE
// Some official builds ship with DCHECKs compiled in. Failing DCHECKs then
// are either fatal or simply log the error, based on a feature flag.
// Make sure V8 follows suit by setting a Dcheck handler that forwards to
// the Chrome base logging implementation.
v8::V8::SetDcheckErrorHandler(&V8DcheckCallbackHandler);
if (!base::FeatureList::IsEnabled(base::kDCheckIsFatalFeature)) {
// These V8 flags default on in this build configuration. This triggers
// additional verification and code generation, which both slows down V8,
// and can lead to fatal CHECKs. Turn these flags down to get something
// closer to V8s normal performance and behavior.
constexpr char kDisabledFlags[] =
"--noturbo_verify "
"--noturbo_verify_allocation "
"--nodebug_code";
v8::V8::SetFlagsFromString(kDisabledFlags, sizeof(kDisabledFlags));
}
#endif // DCHECK_IS_CONFIGURABLE
if (base::SysInfo::IsLowEndDevice()) {
std::string optimize_flag("--optimize-for-size");
v8::V8::SetFlagsFromString(optimize_flag.c_str(),
static_cast<int>(optimize_flag.size()));
}
SetV8FlagIfHasSwitch(switches::kDisableJavaScriptHarmonyShipping,
"--noharmony-shipping");
SetV8FlagIfHasSwitch(switches::kJavaScriptHarmony, "--harmony");
SetV8FlagIfFeature(features::kModuleScriptsDynamicImport,
"--harmony-dynamic-import");
SetV8FlagIfFeature(features::kModuleScriptsImportMetaUrl,
"--harmony-import-meta");
SetV8FlagIfFeature(features::kAsmJsToWebAssembly, "--validate-asm");
SetV8FlagIfNotFeature(features::kAsmJsToWebAssembly, "--no-validate-asm");
SetV8FlagIfFeature(features::kV8Orinoco, "--no-single-threaded-gc");
SetV8FlagIfNotFeature(features::kV8Orinoco, "--single-threaded-gc");
SetV8FlagIfFeature(features::kV8VmFuture, "--future");
SetV8FlagIfNotFeature(features::kV8VmFuture, "--no-future");
SetV8FlagIfFeature(features::kWebAssemblyBaseline,
"--liftoff --wasm-tier-up");
SetV8FlagIfNotFeature(features::kWebAssemblyBaseline,
"--no-liftoff --no-wasm-tier-up");
if (base::FeatureList::IsEnabled(features::kWebAssemblyThreads)) {
constexpr char kFlags[] =
"--harmony-sharedarraybuffer "
"--no-wasm-disable-structured-cloning "
"--experimental-wasm-threads";
v8::V8::SetFlagsFromString(kFlags, sizeof(kFlags));
} else {
SetV8FlagIfNotFeature(features::kWebAssembly,
"--wasm-disable-structured-cloning");
SetV8FlagIfFeature(features::kSharedArrayBuffer,
"--harmony-sharedarraybuffer");
SetV8FlagIfNotFeature(features::kSharedArrayBuffer,
"--no-harmony-sharedarraybuffer");
}
SetV8FlagIfNotFeature(features::kWebAssemblyTrapHandler,
"--no-wasm-trap-handler");
#if defined(OS_LINUX) && defined(ARCH_CPU_X86_64)
if (base::FeatureList::IsEnabled(features::kWebAssemblyTrapHandler)) {
bool use_v8_signal_handler = false;
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
if (!command_line->HasSwitch(
service_manager::switches::kDisableInProcessStackTraces)) {
base::debug::SetStackDumpFirstChanceCallback(v8::V8::TryHandleSignal);
} else if (!command_line->HasSwitch(switches::kEnableCrashReporter) &&
!command_line->HasSwitch(
switches::kEnableCrashReporterForTesting)) {
// If we are using WebAssembly trap handling but both Breakpad and
// in-process stack traces are disabled then there will be no signal
// handler. In this case, we fall back on V8's default handler
// (https://crbug.com/798150).
use_v8_signal_handler = true;
}
// TODO(eholk): report UMA stat for how often this succeeds
v8::V8::EnableWebAssemblyTrapHandler(use_v8_signal_handler);
}
#endif
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
if (command_line.HasSwitch(switches::kNoV8UntrustedCodeMitigations)) {
const char* disable_mitigations = "--no-untrusted-code-mitigations";
v8::V8::SetFlagsFromString(disable_mitigations,
strlen(disable_mitigations));
}
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()));
}
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_;
}
void RenderProcessImpl::AddRefProcess() {
NOTREACHED();
}
void RenderProcessImpl::ReleaseProcess() {
NOTREACHED();
}
} // namespace content