v8/test/cctest/test-lockers.cc
adamk 6dd2bc20b4 Remove unnessary includes of parser.h
This makes for slightly faster rebuilds when touching parser-base.h
(which changes frequently!). Also takes care of an old TODO,
moving CompileTimeValue into its own file under ast/, where it
properly belongs.

BUG=v8:5294

Review-Url: https://codereview.chromium.org/2305883002
Cr-Commit-Position: refs/heads/master@{#39141}
2016-09-02 17:48:46 +00:00

742 lines
23 KiB
C++

// Copyright 2007-2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <limits.h>
#include <memory>
#include "src/v8.h"
#include "src/api.h"
#include "src/base/platform/platform.h"
#include "src/compilation-cache.h"
#include "src/execution.h"
#include "src/isolate.h"
#include "src/unicode-inl.h"
#include "src/utils.h"
#include "test/cctest/cctest.h"
using ::v8::Context;
using ::v8::Extension;
using ::v8::Function;
using ::v8::HandleScope;
using ::v8::Local;
using ::v8::Object;
using ::v8::ObjectTemplate;
using ::v8::Persistent;
using ::v8::Script;
using ::v8::String;
using ::v8::Value;
using ::v8::V8;
// Migrating an isolate
class KangarooThread : public v8::base::Thread {
public:
KangarooThread(v8::Isolate* isolate, v8::Local<v8::Context> context)
: Thread(Options("KangarooThread")),
isolate_(isolate),
context_(isolate, context) {}
void Run() {
{
v8::Locker locker(isolate_);
v8::Isolate::Scope isolate_scope(isolate_);
CHECK_EQ(isolate_, v8::Isolate::GetCurrent());
v8::HandleScope scope(isolate_);
v8::Local<v8::Context> context =
v8::Local<v8::Context>::New(isolate_, context_);
v8::Context::Scope context_scope(context);
Local<Value> v = CompileRun("getValue()");
CHECK(v->IsNumber());
CHECK_EQ(30, static_cast<int>(v->NumberValue(context).FromJust()));
}
{
v8::Locker locker(isolate_);
v8::Isolate::Scope isolate_scope(isolate_);
v8::HandleScope scope(isolate_);
v8::Local<v8::Context> context =
v8::Local<v8::Context>::New(isolate_, context_);
v8::Context::Scope context_scope(context);
Local<Value> v = CompileRun("getValue()");
CHECK(v->IsNumber());
CHECK_EQ(30, static_cast<int>(v->NumberValue(context).FromJust()));
}
isolate_->Dispose();
}
private:
v8::Isolate* isolate_;
Persistent<v8::Context> context_;
};
// Migrates an isolate from one thread to another
TEST(KangarooIsolates) {
v8::Isolate::CreateParams create_params;
create_params.array_buffer_allocator = CcTest::array_buffer_allocator();
v8::Isolate* isolate = v8::Isolate::New(create_params);
std::unique_ptr<KangarooThread> thread1;
{
v8::Locker locker(isolate);
v8::Isolate::Scope isolate_scope(isolate);
v8::HandleScope handle_scope(isolate);
v8::Local<v8::Context> context = v8::Context::New(isolate);
v8::Context::Scope context_scope(context);
CHECK_EQ(isolate, v8::Isolate::GetCurrent());
CompileRun("function getValue() { return 30; }");
thread1.reset(new KangarooThread(isolate, context));
}
thread1->Start();
thread1->Join();
}
static void CalcFibAndCheck(v8::Local<v8::Context> context) {
Local<Value> v = CompileRun("function fib(n) {"
" if (n <= 2) return 1;"
" return fib(n-1) + fib(n-2);"
"}"
"fib(10)");
CHECK(v->IsNumber());
CHECK_EQ(55, static_cast<int>(v->NumberValue(context).FromJust()));
}
class JoinableThread {
public:
explicit JoinableThread(const char* name)
: name_(name),
semaphore_(0),
thread_(this) {
}
virtual ~JoinableThread() {}
void Start() {
thread_.Start();
}
void Join() {
semaphore_.Wait();
thread_.Join();
}
virtual void Run() = 0;
private:
class ThreadWithSemaphore : public v8::base::Thread {
public:
explicit ThreadWithSemaphore(JoinableThread* joinable_thread)
: Thread(Options(joinable_thread->name_)),
joinable_thread_(joinable_thread) {}
virtual void Run() {
joinable_thread_->Run();
joinable_thread_->semaphore_.Signal();
}
private:
JoinableThread* joinable_thread_;
};
const char* name_;
v8::base::Semaphore semaphore_;
ThreadWithSemaphore thread_;
friend class ThreadWithSemaphore;
DISALLOW_COPY_AND_ASSIGN(JoinableThread);
};
class IsolateLockingThreadWithLocalContext : public JoinableThread {
public:
explicit IsolateLockingThreadWithLocalContext(v8::Isolate* isolate)
: JoinableThread("IsolateLockingThread"),
isolate_(isolate) {
}
virtual void Run() {
v8::Locker locker(isolate_);
v8::Isolate::Scope isolate_scope(isolate_);
v8::HandleScope handle_scope(isolate_);
LocalContext local_context(isolate_);
CHECK_EQ(isolate_, v8::Isolate::GetCurrent());
CalcFibAndCheck(local_context.local());
}
private:
v8::Isolate* isolate_;
};
static void StartJoinAndDeleteThreads(const i::List<JoinableThread*>& threads) {
for (int i = 0; i < threads.length(); i++) {
threads[i]->Start();
}
for (int i = 0; i < threads.length(); i++) {
threads[i]->Join();
}
for (int i = 0; i < threads.length(); i++) {
delete threads[i];
}
}
// Run many threads all locking on the same isolate
TEST(IsolateLockingStress) {
i::FLAG_always_opt = false;
#if V8_TARGET_ARCH_MIPS
const int kNThreads = 50;
#else
const int kNThreads = 100;
#endif
i::List<JoinableThread*> threads(kNThreads);
v8::Isolate::CreateParams create_params;
create_params.array_buffer_allocator = CcTest::array_buffer_allocator();
v8::Isolate* isolate = v8::Isolate::New(create_params);
for (int i = 0; i < kNThreads; i++) {
threads.Add(new IsolateLockingThreadWithLocalContext(isolate));
}
StartJoinAndDeleteThreads(threads);
isolate->Dispose();
}
class IsolateNestedLockingThread : public JoinableThread {
public:
explicit IsolateNestedLockingThread(v8::Isolate* isolate)
: JoinableThread("IsolateNestedLocking"), isolate_(isolate) {
}
virtual void Run() {
v8::Locker lock(isolate_);
v8::Isolate::Scope isolate_scope(isolate_);
v8::HandleScope handle_scope(isolate_);
LocalContext local_context(isolate_);
{
v8::Locker another_lock(isolate_);
CalcFibAndCheck(local_context.local());
}
{
v8::Locker another_lock(isolate_);
CalcFibAndCheck(local_context.local());
}
}
private:
v8::Isolate* isolate_;
};
// Run many threads with nested locks
TEST(IsolateNestedLocking) {
i::FLAG_always_opt = false;
#if V8_TARGET_ARCH_MIPS
const int kNThreads = 50;
#else
const int kNThreads = 100;
#endif
v8::Isolate::CreateParams create_params;
create_params.array_buffer_allocator = CcTest::array_buffer_allocator();
v8::Isolate* isolate = v8::Isolate::New(create_params);
i::List<JoinableThread*> threads(kNThreads);
for (int i = 0; i < kNThreads; i++) {
threads.Add(new IsolateNestedLockingThread(isolate));
}
StartJoinAndDeleteThreads(threads);
isolate->Dispose();
}
class SeparateIsolatesLocksNonexclusiveThread : public JoinableThread {
public:
SeparateIsolatesLocksNonexclusiveThread(v8::Isolate* isolate1,
v8::Isolate* isolate2)
: JoinableThread("SeparateIsolatesLocksNonexclusiveThread"),
isolate1_(isolate1), isolate2_(isolate2) {
}
virtual void Run() {
v8::Locker lock(isolate1_);
v8::Isolate::Scope isolate_scope(isolate1_);
v8::HandleScope handle_scope(isolate1_);
LocalContext local_context(isolate1_);
IsolateLockingThreadWithLocalContext threadB(isolate2_);
threadB.Start();
CalcFibAndCheck(local_context.local());
threadB.Join();
}
private:
v8::Isolate* isolate1_;
v8::Isolate* isolate2_;
};
// Run parallel threads that lock and access different isolates in parallel
TEST(SeparateIsolatesLocksNonexclusive) {
i::FLAG_always_opt = false;
#if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_S390
const int kNThreads = 50;
#else
const int kNThreads = 100;
#endif
v8::Isolate::CreateParams create_params;
create_params.array_buffer_allocator = CcTest::array_buffer_allocator();
v8::Isolate* isolate1 = v8::Isolate::New(create_params);
v8::Isolate* isolate2 = v8::Isolate::New(create_params);
i::List<JoinableThread*> threads(kNThreads);
for (int i = 0; i < kNThreads; i++) {
threads.Add(new SeparateIsolatesLocksNonexclusiveThread(isolate1,
isolate2));
}
StartJoinAndDeleteThreads(threads);
isolate2->Dispose();
isolate1->Dispose();
}
class LockIsolateAndCalculateFibSharedContextThread : public JoinableThread {
public:
explicit LockIsolateAndCalculateFibSharedContextThread(
v8::Isolate* isolate, v8::Local<v8::Context> context)
: JoinableThread("LockIsolateAndCalculateFibThread"),
isolate_(isolate),
context_(isolate, context) {}
virtual void Run() {
v8::Locker lock(isolate_);
v8::Isolate::Scope isolate_scope(isolate_);
HandleScope handle_scope(isolate_);
v8::Local<v8::Context> context =
v8::Local<v8::Context>::New(isolate_, context_);
v8::Context::Scope context_scope(context);
CalcFibAndCheck(context);
}
private:
v8::Isolate* isolate_;
Persistent<v8::Context> context_;
};
class LockerUnlockerThread : public JoinableThread {
public:
explicit LockerUnlockerThread(v8::Isolate* isolate)
: JoinableThread("LockerUnlockerThread"),
isolate_(isolate) {
}
virtual void Run() {
isolate_->DiscardThreadSpecificMetadata(); // No-op
{
v8::Locker lock(isolate_);
v8::Isolate::Scope isolate_scope(isolate_);
v8::HandleScope handle_scope(isolate_);
v8::Local<v8::Context> context = v8::Context::New(isolate_);
{
v8::Context::Scope context_scope(context);
CalcFibAndCheck(context);
}
{
LockIsolateAndCalculateFibSharedContextThread thread(isolate_, context);
isolate_->Exit();
v8::Unlocker unlocker(isolate_);
thread.Start();
thread.Join();
}
isolate_->Enter();
{
v8::Context::Scope context_scope(context);
CalcFibAndCheck(context);
}
}
isolate_->DiscardThreadSpecificMetadata();
isolate_->DiscardThreadSpecificMetadata(); // No-op
}
private:
v8::Isolate* isolate_;
};
// Use unlocker inside of a Locker, multiple threads.
TEST(LockerUnlocker) {
i::FLAG_always_opt = false;
#if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_S390
const int kNThreads = 50;
#else
const int kNThreads = 100;
#endif
i::List<JoinableThread*> threads(kNThreads);
v8::Isolate::CreateParams create_params;
create_params.array_buffer_allocator = CcTest::array_buffer_allocator();
v8::Isolate* isolate = v8::Isolate::New(create_params);
for (int i = 0; i < kNThreads; i++) {
threads.Add(new LockerUnlockerThread(isolate));
}
StartJoinAndDeleteThreads(threads);
isolate->Dispose();
}
class LockTwiceAndUnlockThread : public JoinableThread {
public:
explicit LockTwiceAndUnlockThread(v8::Isolate* isolate)
: JoinableThread("LockTwiceAndUnlockThread"),
isolate_(isolate) {
}
virtual void Run() {
v8::Locker lock(isolate_);
v8::Isolate::Scope isolate_scope(isolate_);
v8::HandleScope handle_scope(isolate_);
v8::Local<v8::Context> context = v8::Context::New(isolate_);
{
v8::Context::Scope context_scope(context);
CalcFibAndCheck(context);
}
{
v8::Locker second_lock(isolate_);
{
LockIsolateAndCalculateFibSharedContextThread thread(isolate_, context);
isolate_->Exit();
v8::Unlocker unlocker(isolate_);
thread.Start();
thread.Join();
}
}
isolate_->Enter();
{
v8::Context::Scope context_scope(context);
CalcFibAndCheck(context);
}
}
private:
v8::Isolate* isolate_;
};
// Use Unlocker inside two Lockers.
TEST(LockTwiceAndUnlock) {
i::FLAG_always_opt = false;
#if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_S390
const int kNThreads = 50;
#else
const int kNThreads = 100;
#endif
i::List<JoinableThread*> threads(kNThreads);
v8::Isolate::CreateParams create_params;
create_params.array_buffer_allocator = CcTest::array_buffer_allocator();
v8::Isolate* isolate = v8::Isolate::New(create_params);
for (int i = 0; i < kNThreads; i++) {
threads.Add(new LockTwiceAndUnlockThread(isolate));
}
StartJoinAndDeleteThreads(threads);
isolate->Dispose();
}
class LockAndUnlockDifferentIsolatesThread : public JoinableThread {
public:
LockAndUnlockDifferentIsolatesThread(v8::Isolate* isolate1,
v8::Isolate* isolate2)
: JoinableThread("LockAndUnlockDifferentIsolatesThread"),
isolate1_(isolate1),
isolate2_(isolate2) {
}
virtual void Run() {
std::unique_ptr<LockIsolateAndCalculateFibSharedContextThread> thread;
v8::Locker lock1(isolate1_);
CHECK(v8::Locker::IsLocked(isolate1_));
CHECK(!v8::Locker::IsLocked(isolate2_));
{
v8::Isolate::Scope isolate_scope(isolate1_);
v8::HandleScope handle_scope(isolate1_);
v8::Local<v8::Context> context1 = v8::Context::New(isolate1_);
{
v8::Context::Scope context_scope(context1);
CalcFibAndCheck(context1);
}
thread.reset(new LockIsolateAndCalculateFibSharedContextThread(isolate1_,
context1));
}
v8::Locker lock2(isolate2_);
CHECK(v8::Locker::IsLocked(isolate1_));
CHECK(v8::Locker::IsLocked(isolate2_));
{
v8::Isolate::Scope isolate_scope(isolate2_);
v8::HandleScope handle_scope(isolate2_);
v8::Local<v8::Context> context2 = v8::Context::New(isolate2_);
{
v8::Context::Scope context_scope(context2);
CalcFibAndCheck(context2);
}
v8::Unlocker unlock1(isolate1_);
CHECK(!v8::Locker::IsLocked(isolate1_));
CHECK(v8::Locker::IsLocked(isolate2_));
v8::Context::Scope context_scope(context2);
thread->Start();
CalcFibAndCheck(context2);
thread->Join();
}
}
private:
v8::Isolate* isolate1_;
v8::Isolate* isolate2_;
};
// Lock two isolates and unlock one of them.
TEST(LockAndUnlockDifferentIsolates) {
v8::Isolate::CreateParams create_params;
create_params.array_buffer_allocator = CcTest::array_buffer_allocator();
v8::Isolate* isolate1 = v8::Isolate::New(create_params);
v8::Isolate* isolate2 = v8::Isolate::New(create_params);
LockAndUnlockDifferentIsolatesThread thread(isolate1, isolate2);
thread.Start();
thread.Join();
isolate2->Dispose();
isolate1->Dispose();
}
class LockUnlockLockThread : public JoinableThread {
public:
LockUnlockLockThread(v8::Isolate* isolate, v8::Local<v8::Context> context)
: JoinableThread("LockUnlockLockThread"),
isolate_(isolate),
context_(isolate, context) {}
virtual void Run() {
v8::Locker lock1(isolate_);
CHECK(v8::Locker::IsLocked(isolate_));
CHECK(!v8::Locker::IsLocked(CcTest::isolate()));
{
v8::Isolate::Scope isolate_scope(isolate_);
v8::HandleScope handle_scope(isolate_);
v8::Local<v8::Context> context =
v8::Local<v8::Context>::New(isolate_, context_);
v8::Context::Scope context_scope(context);
CalcFibAndCheck(context);
}
{
v8::Unlocker unlock1(isolate_);
CHECK(!v8::Locker::IsLocked(isolate_));
CHECK(!v8::Locker::IsLocked(CcTest::isolate()));
{
v8::Locker lock2(isolate_);
v8::Isolate::Scope isolate_scope(isolate_);
v8::HandleScope handle_scope(isolate_);
CHECK(v8::Locker::IsLocked(isolate_));
CHECK(!v8::Locker::IsLocked(CcTest::isolate()));
v8::Local<v8::Context> context =
v8::Local<v8::Context>::New(isolate_, context_);
v8::Context::Scope context_scope(context);
CalcFibAndCheck(context);
}
}
}
private:
v8::Isolate* isolate_;
v8::Persistent<v8::Context> context_;
};
// Locker inside an Unlocker inside a Locker.
TEST(LockUnlockLockMultithreaded) {
#if V8_TARGET_ARCH_MIPS
const int kNThreads = 50;
#else
const int kNThreads = 100;
#endif
v8::Isolate::CreateParams create_params;
create_params.array_buffer_allocator = CcTest::array_buffer_allocator();
v8::Isolate* isolate = v8::Isolate::New(create_params);
i::List<JoinableThread*> threads(kNThreads);
{
v8::Locker locker_(isolate);
v8::Isolate::Scope isolate_scope(isolate);
v8::HandleScope handle_scope(isolate);
v8::Local<v8::Context> context = v8::Context::New(isolate);
for (int i = 0; i < kNThreads; i++) {
threads.Add(new LockUnlockLockThread(
isolate, context));
}
}
StartJoinAndDeleteThreads(threads);
isolate->Dispose();
}
class LockUnlockLockDefaultIsolateThread : public JoinableThread {
public:
explicit LockUnlockLockDefaultIsolateThread(v8::Local<v8::Context> context)
: JoinableThread("LockUnlockLockDefaultIsolateThread"),
context_(CcTest::isolate(), context) {}
virtual void Run() {
v8::Locker lock1(CcTest::isolate());
{
v8::Isolate::Scope isolate_scope(CcTest::isolate());
v8::HandleScope handle_scope(CcTest::isolate());
v8::Local<v8::Context> context =
v8::Local<v8::Context>::New(CcTest::isolate(), context_);
v8::Context::Scope context_scope(context);
CalcFibAndCheck(context);
}
{
v8::Unlocker unlock1(CcTest::isolate());
{
v8::Locker lock2(CcTest::isolate());
v8::Isolate::Scope isolate_scope(CcTest::isolate());
v8::HandleScope handle_scope(CcTest::isolate());
v8::Local<v8::Context> context =
v8::Local<v8::Context>::New(CcTest::isolate(), context_);
v8::Context::Scope context_scope(context);
CalcFibAndCheck(context);
}
}
}
private:
v8::Persistent<v8::Context> context_;
};
// Locker inside an Unlocker inside a Locker for default isolate.
TEST(LockUnlockLockDefaultIsolateMultithreaded) {
#if V8_TARGET_ARCH_MIPS
const int kNThreads = 50;
#else
const int kNThreads = 100;
#endif
Local<v8::Context> context;
i::List<JoinableThread*> threads(kNThreads);
{
v8::Locker locker_(CcTest::isolate());
v8::Isolate::Scope isolate_scope(CcTest::isolate());
v8::HandleScope handle_scope(CcTest::isolate());
context = v8::Context::New(CcTest::isolate());
for (int i = 0; i < kNThreads; i++) {
threads.Add(new LockUnlockLockDefaultIsolateThread(context));
}
}
StartJoinAndDeleteThreads(threads);
}
TEST(Regress1433) {
for (int i = 0; i < 10; i++) {
v8::Isolate::CreateParams create_params;
create_params.array_buffer_allocator = CcTest::array_buffer_allocator();
v8::Isolate* isolate = v8::Isolate::New(create_params);
{
v8::Locker lock(isolate);
v8::Isolate::Scope isolate_scope(isolate);
v8::HandleScope handle_scope(isolate);
v8::Local<Context> context = v8::Context::New(isolate);
v8::Context::Scope context_scope(context);
v8::Local<String> source = v8_str("1+1");
v8::Local<Script> script =
v8::Script::Compile(context, source).ToLocalChecked();
v8::Local<Value> result = script->Run(context).ToLocalChecked();
v8::String::Utf8Value utf8(result);
}
isolate->Dispose();
}
}
static const char* kSimpleExtensionSource =
"(function Foo() {"
" return 4;"
"})() ";
class IsolateGenesisThread : public JoinableThread {
public:
IsolateGenesisThread(int count, const char* extension_names[])
: JoinableThread("IsolateGenesisThread"),
count_(count),
extension_names_(extension_names)
{}
virtual void Run() {
v8::Isolate::CreateParams create_params;
create_params.array_buffer_allocator = CcTest::array_buffer_allocator();
v8::Isolate* isolate = v8::Isolate::New(create_params);
{
v8::Isolate::Scope isolate_scope(isolate);
CHECK(
!reinterpret_cast<i::Isolate*>(isolate)->has_installed_extensions());
v8::ExtensionConfiguration extensions(count_, extension_names_);
v8::HandleScope handle_scope(isolate);
v8::Context::New(isolate, &extensions);
CHECK(reinterpret_cast<i::Isolate*>(isolate)->has_installed_extensions());
}
isolate->Dispose();
}
private:
int count_;
const char** extension_names_;
};
// Test installing extensions in separate isolates concurrently.
// http://code.google.com/p/v8/issues/detail?id=1821
TEST(ExtensionsRegistration) {
#if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_MIPS
const int kNThreads = 10;
#elif V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_32_BIT
const int kNThreads = 4;
#elif V8_TARGET_ARCH_S390 && V8_TARGET_ARCH_32_BIT
const int kNThreads = 10;
#else
const int kNThreads = 40;
#endif
v8::RegisterExtension(new v8::Extension("test0",
kSimpleExtensionSource));
v8::RegisterExtension(new v8::Extension("test1",
kSimpleExtensionSource));
v8::RegisterExtension(new v8::Extension("test2",
kSimpleExtensionSource));
v8::RegisterExtension(new v8::Extension("test3",
kSimpleExtensionSource));
v8::RegisterExtension(new v8::Extension("test4",
kSimpleExtensionSource));
v8::RegisterExtension(new v8::Extension("test5",
kSimpleExtensionSource));
v8::RegisterExtension(new v8::Extension("test6",
kSimpleExtensionSource));
v8::RegisterExtension(new v8::Extension("test7",
kSimpleExtensionSource));
const char* extension_names[] = { "test0", "test1",
"test2", "test3", "test4",
"test5", "test6", "test7" };
i::List<JoinableThread*> threads(kNThreads);
for (int i = 0; i < kNThreads; i++) {
threads.Add(new IsolateGenesisThread(8, extension_names));
}
StartJoinAndDeleteThreads(threads);
}