* to the user of V8 to ensure (perhaps with locking) that this
* constraint is not violated.
*
- * More then one thread and multiple V8 isolates can be used
- * without any locking if each isolate is created and accessed
- * by a single thread only. For example, one thread can use
- * multiple isolates or multiple threads can each create and run
- * their own isolate.
+ * v8::Locker is a scoped lock object. While it's
+ * active (i.e. between its construction and destruction) the current thread is
+ * allowed to use the locked isolate. V8 guarantees that an isolate can be locked
+ * by at most one thread at any time. In other words, the scope of a v8::Locker is
+ * a critical section.
*
- * If you wish to start using V8 isolate in more then one thread
- * you can do this by constructing a v8::Locker object to guard
- * access to the isolate. After the code using V8 has completed
- * for the current thread you can call the destructor. This can
- * be combined with C++ scope-based construction as follows
- * (assumes the default isolate that is used if not specified as
- * a parameter for the Locker):
- *
- * \code
+ * Sample usage:
+* \code
* ...
* {
- * v8::Locker locker;
+ * v8::Locker locker(isolate);
+ * v8::Isolate::Scope isolate_scope(isolate);
* ...
- * // Code using V8 goes here.
+ * // Code using V8 and isolate goes here.
* ...
* } // Destructor called here
* \endcode
*
* \code
* {
- * v8::Unlocker unlocker;
+ * isolate->Exit();
+ * v8::Unlocker unlocker(isolate);
* ...
* // Code not using V8 goes here while V8 can run in another thread.
* ...
* } // Destructor called here.
+ * isolate->Enter();
* \endcode
*
* The Unlocker object is intended for use in a long-running callback
* \code
* // V8 not locked.
* {
- * v8::Locker locker;
+ * v8::Locker locker(isolate);
+ * Isolate::Scope isolate_scope(isolate);
* // V8 locked.
* {
- * v8::Locker another_locker;
+ * v8::Locker another_locker(isolate);
* // V8 still locked (2 levels).
* {
- * v8::Unlocker unlocker;
+ * isolate->Exit();
+ * v8::Unlocker unlocker(isolate);
* // V8 not locked.
* }
+ * isolate->Enter();
* // V8 locked again (2 levels).
* }
* // V8 still locked (1 level).
* }
* // V8 Now no longer locked.
* \endcode
+ *
+ *
*/
class V8EXPORT Unlocker {
public:
- Unlocker();
+ /**
+ * Initialize Unlocker for a given Isolate. NULL means default isolate.
+ */
+ explicit Unlocker(Isolate* isolate = NULL);
~Unlocker();
+ private:
+ internal::Isolate* isolate_;
};
class V8EXPORT Locker {
public:
- Locker();
+ /**
+ * Initialize Locker for a given Isolate. NULL means default isolate.
+ */
+ explicit Locker(Isolate* isolate = NULL);
~Locker();
/**
static void StopPreemption();
/**
- * Returns whether or not the locker is locked by the current thread.
+ * Returns whether or not the locker for a given isolate, or default isolate if NULL is given,
+ * is locked by the current thread.
*/
- static bool IsLocked();
+ static bool IsLocked(Isolate* isolate = NULL);
/**
* Returns whether v8::Locker is being used by this V8 instance.
private:
bool has_lock_;
bool top_level_;
+ internal::Isolate* isolate_;
static bool active_;
#define LOG_API(isolate, expr) LOG(isolate, ApiEntryCall(expr))
-// TODO(isolates): avoid repeated TLS reads in function prologues.
#ifdef ENABLE_VMSTATE_TRACKING
#define ENTER_V8(isolate) \
ASSERT((isolate)->IsInitialized()); \
if (isolate != NULL) {
if (isolate->IsInitialized()) return true;
}
+ ASSERT(isolate == i::Isolate::Current());
return ApiCheck(InitializeHelper(), location, "Error initializing V8");
}
char* HandleScopeImplementer::ArchiveThread(char* storage) {
- Isolate* isolate = Isolate::Current();
v8::ImplementationUtilities::HandleScopeData* current =
- isolate->handle_scope_data();
+ isolate_->handle_scope_data();
handle_scope_data_ = *current;
memcpy(storage, this, sizeof(*this));
char* HandleScopeImplementer::RestoreThread(char* storage) {
memcpy(this, storage, sizeof(*this));
- *Isolate::Current()->handle_scope_data() = handle_scope_data_;
+ *isolate_->handle_scope_data() = handle_scope_data_;
return storage + ArchiveSpacePerThread();
}
void HandleScopeImplementer::Iterate(ObjectVisitor* v) {
v8::ImplementationUtilities::HandleScopeData* current =
- Isolate::Current()->handle_scope_data();
+ isolate_->handle_scope_data();
handle_scope_data_ = *current;
IterateThis(v);
}
ISOLATED_CLASS HandleScopeImplementer {
public:
- HandleScopeImplementer()
- : blocks_(0),
+ explicit HandleScopeImplementer(Isolate* isolate)
+ : isolate_(isolate),
+ blocks_(0),
entered_contexts_(0),
saved_contexts_(0),
spare_(NULL),
ASSERT(call_depth_ == 0);
}
+ Isolate* isolate_;
List<internal::Object**> blocks_;
// Used as a stack to keep track of entered contexts.
List<Handle<Object> > entered_contexts_;
void StackGuard::InitThread(const ExecutionAccess& lock) {
if (thread_local_.Initialize()) isolate_->heap()->SetStackLimits();
- uintptr_t stored_limit =
- Isolate::CurrentPerIsolateThreadData()->stack_limit();
+ Isolate::PerIsolateThreadData* per_thread =
+ isolate_->FindOrAllocatePerThreadDataForThisThread();
+ uintptr_t stored_limit = per_thread->stack_limit();
// You should hold the ExecutionAccess lock when you call this.
if (stored_limit != 0) {
StackGuard::SetStackLimit(stored_limit);
}
+Isolate::PerIsolateThreadData* Isolate::FindPerThreadDataForThisThread() {
+ ThreadId thread_id = ThreadId::Current();
+ PerIsolateThreadData* per_thread = NULL;
+ {
+ ScopedLock lock(process_wide_mutex_);
+ per_thread = thread_data_table_->Lookup(this, thread_id);
+ }
+ return per_thread;
+}
+
+
void Isolate::EnsureDefaultIsolate() {
ScopedLock lock(process_wide_mutex_);
if (default_isolate_ == NULL) {
}
// Can't use SetIsolateThreadLocals(default_isolate_, NULL) here
// becase a non-null thread data may be already set.
- Thread::SetThreadLocal(isolate_key_, default_isolate_);
+ if (Thread::GetThreadLocal(isolate_key_) == NULL) {
+ Thread::SetThreadLocal(isolate_key_, default_isolate_);
+ }
CHECK(default_isolate_->PreInit());
}
zone_.isolate_ = this;
stack_guard_.isolate_ = this;
+ // ThreadManager is initialized early to support locking an isolate
+ // before it is entered.
+ thread_manager_ = new ThreadManager();
+ thread_manager_->isolate_ = this;
+
#if defined(V8_TARGET_ARCH_ARM) && !defined(__arm__) || \
defined(V8_TARGET_ARCH_MIPS) && !defined(__mips__)
simulator_initialized_ = false;
TRACE_ISOLATE(preinit);
ASSERT(Isolate::Current() == this);
-
#ifdef ENABLE_DEBUGGER_SUPPORT
debug_ = new Debug(this);
debugger_ = new Debugger();
string_tracker_ = new StringTracker();
string_tracker_->isolate_ = this;
- thread_manager_ = new ThreadManager();
- thread_manager_->isolate_ = this;
compilation_cache_ = new CompilationCache(this);
transcendental_cache_ = new TranscendentalCache();
keyed_lookup_cache_ = new KeyedLookupCache();
write_input_buffer_ = new StringInputBuffer();
global_handles_ = new GlobalHandles(this);
bootstrapper_ = new Bootstrapper();
- handle_scope_implementer_ = new HandleScopeImplementer();
+ handle_scope_implementer_ = new HandleScopeImplementer(this);
stub_cache_ = new StubCache(this);
ast_sentinels_ = new AstSentinels();
regexp_stack_ = new RegExpStack();
void Isolate::InitializeThreadLocal() {
+ thread_local_top_.isolate_ = this;
thread_local_top_.Initialize();
clear_pending_exception();
clear_pending_message();
ASSERT(try_catch_handler_address_ == NULL);
}
+ Isolate* isolate_;
// The context where the current execution method is created and for variable
// lookups.
Context* context_;
// Safe to call multiple times.
static void EnsureDefaultIsolate();
+ // Find the PerThread for this particular (isolate, thread) combination
+ // If one does not yet exist, return null.
+ PerIsolateThreadData* FindPerThreadDataForThisThread();
+
#ifdef ENABLE_DEBUGGER_SUPPORT
// Get the debugger from the default isolate. Preinitializes the
// default isolate if needed.
// If one does not yet exist, allocate a new one.
PerIsolateThreadData* FindOrAllocatePerThreadDataForThisThread();
- // PreInits and returns a default isolate. Needed when a new thread tries
+// PreInits and returns a default isolate. Needed when a new thread tries
// to create a Locker for the first time (the lock itself is in the isolate).
static Isolate* GetDefaultIsolateForLocking();
friend class ExecutionAccess;
friend class IsolateInitializer;
+ friend class ThreadManager;
+ friend class StackGuard;
friend class ThreadId;
friend class v8::Isolate;
friend class v8::Locker;
+ friend class v8::Unlocker;
DISALLOW_COPY_AND_ASSIGN(Isolate);
};
// Archive statics that are thread local.
-char* Relocatable::ArchiveState(char* to) {
- Isolate* isolate = Isolate::Current();
+char* Relocatable::ArchiveState(Isolate* isolate, char* to) {
*reinterpret_cast<Relocatable**>(to) = isolate->relocatable_top();
isolate->set_relocatable_top(NULL);
return to + ArchiveSpacePerThread();
// Restore statics that are thread local.
-char* Relocatable::RestoreState(char* from) {
- Isolate* isolate = Isolate::Current();
+char* Relocatable::RestoreState(Isolate* isolate, char* from) {
isolate->set_relocatable_top(*reinterpret_cast<Relocatable**>(from));
return from + ArchiveSpacePerThread();
}
static void PostGarbageCollectionProcessing();
static int ArchiveSpacePerThread();
- static char* ArchiveState(char* to);
- static char* RestoreState(char* from);
+ static char* ArchiveState(Isolate* isolate, char* to);
+ static char* RestoreState(Isolate* isolate, char* from);
static void Iterate(ObjectVisitor* v);
static void Iterate(ObjectVisitor* v, Relocatable* top);
static char* Iterate(ObjectVisitor* v, char* t);
InitializeInternal();
#ifdef USE_SIMULATOR
#ifdef V8_TARGET_ARCH_ARM
- simulator_ = Simulator::current(Isolate::Current());
+ simulator_ = Simulator::current(isolate_);
#elif V8_TARGET_ARCH_MIPS
- simulator_ = Simulator::current(Isolate::Current());
+ simulator_ = Simulator::current(isolate_);
#endif
#endif
thread_id_ = ThreadId::Current();
// Constructor for the Locker object. Once the Locker is constructed the
-// current thread will be guaranteed to have the big V8 lock.
-Locker::Locker() : has_lock_(false), top_level_(true) {
- // TODO(isolates): When Locker has Isolate parameter and it is provided, grab
- // that one instead of using the current one.
- // We pull default isolate for Locker constructor w/o p[arameter.
- // A thread should not enter an isolate before acquiring a lock,
- // in cases which mandate using Lockers.
- // So getting a lock is the first thing threads do in a scenario where
- // multple threads share an isolate. Hence, we need to access
- // 'locking isolate' before we can actually enter into default isolate.
- internal::Isolate* isolate = internal::Isolate::GetDefaultIsolateForLocking();
- ASSERT(isolate != NULL);
-
+// current thread will be guaranteed to have the lock for a given isolate.
+Locker::Locker(v8::Isolate* isolate)
+ : has_lock_(false),
+ top_level_(false),
+ isolate_(reinterpret_cast<i::Isolate*>(isolate)) {
+ if (isolate_ == NULL) {
+ isolate_ = i::Isolate::GetDefaultIsolateForLocking();
+ }
// Record that the Locker has been used at least once.
active_ = true;
// Get the big lock if necessary.
- if (!isolate->thread_manager()->IsLockedByCurrentThread()) {
- isolate->thread_manager()->Lock();
+ if (!isolate_->thread_manager()->IsLockedByCurrentThread()) {
+ isolate_->thread_manager()->Lock();
has_lock_ = true;
- if (isolate->IsDefaultIsolate()) {
- // This only enters if not yet entered.
- internal::Isolate::EnterDefaultIsolate();
- }
-
- ASSERT(internal::Thread::HasThreadLocal(
- internal::Isolate::thread_id_key()));
-
// Make sure that V8 is initialized. Archiving of threads interferes
// with deserialization by adding additional root pointers, so we must
// initialize here, before anyone can call ~Locker() or Unlocker().
- if (!isolate->IsInitialized()) {
+ if (isolate_->IsDefaultIsolate()) {
+ // This only enters if not yet entered.
+ internal::Isolate::EnterDefaultIsolate();
+ } else if (!isolate_->IsInitialized()) {
+ isolate_->Enter();
V8::Initialize();
+ isolate_->Exit();
}
+
// This may be a locker within an unlocker in which case we have to
// get the saved state for this thread and restore it.
- if (isolate->thread_manager()->RestoreThread()) {
+ if (isolate_->thread_manager()->RestoreThread()) {
top_level_ = false;
} else {
- internal::ExecutionAccess access(isolate);
- isolate->stack_guard()->ClearThread(access);
- isolate->stack_guard()->InitThread(access);
+ internal::ExecutionAccess access(isolate_);
+ isolate_->stack_guard()->ClearThread(access);
+ isolate_->stack_guard()->InitThread(access);
}
}
- ASSERT(isolate->thread_manager()->IsLockedByCurrentThread());
+ ASSERT(isolate_->thread_manager()->IsLockedByCurrentThread());
}
-bool Locker::IsLocked() {
- return internal::Isolate::Current()->thread_manager()->
- IsLockedByCurrentThread();
+bool Locker::IsLocked(v8::Isolate* isolate) {
+ i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(isolate);
+ if (internal_isolate == NULL) {
+ internal_isolate = i::Isolate::GetDefaultIsolateForLocking();
+ }
+ return internal_isolate->thread_manager()->IsLockedByCurrentThread();
}
Locker::~Locker() {
- // TODO(isolate): this should use a field storing the isolate it
- // locked instead.
- internal::Isolate* isolate = internal::Isolate::Current();
- ASSERT(isolate->thread_manager()->IsLockedByCurrentThread());
+ ASSERT(isolate_->thread_manager()->IsLockedByCurrentThread());
if (has_lock_) {
if (top_level_) {
- isolate->thread_manager()->FreeThreadResources();
+ isolate_->thread_manager()->FreeThreadResources();
} else {
- isolate->thread_manager()->ArchiveThread();
+ isolate_->thread_manager()->ArchiveThread();
}
- isolate->thread_manager()->Unlock();
+ isolate_->thread_manager()->Unlock();
}
}
-Unlocker::Unlocker() {
- internal::Isolate* isolate = internal::Isolate::Current();
- ASSERT(isolate->thread_manager()->IsLockedByCurrentThread());
- isolate->thread_manager()->ArchiveThread();
- isolate->thread_manager()->Unlock();
+Unlocker::Unlocker(v8::Isolate* isolate)
+ : isolate_(reinterpret_cast<i::Isolate*>(isolate)) {
+ if (isolate_ == NULL) {
+ isolate_ = i::Isolate::GetDefaultIsolateForLocking();
+ }
+
+ ASSERT(isolate_->thread_manager()->IsLockedByCurrentThread());
+ isolate_->thread_manager()->ArchiveThread();
+ isolate_->thread_manager()->Unlock();
}
Unlocker::~Unlocker() {
- // TODO(isolates): check it's the isolate we unlocked.
- internal::Isolate* isolate = internal::Isolate::Current();
- ASSERT(!isolate->thread_manager()->IsLockedByCurrentThread());
- isolate->thread_manager()->Lock();
- isolate->thread_manager()->RestoreThread();
+ ASSERT(!isolate_->thread_manager()->IsLockedByCurrentThread());
+ isolate_->thread_manager()->Lock();
+ isolate_->thread_manager()->RestoreThread();
}
bool ThreadManager::RestoreThread() {
+ ASSERT(IsLockedByCurrentThread());
// First check whether the current thread has been 'lazily archived', ie
// not archived at all. If that is the case we put the state storage we
// had prepared back in the free list, since we didn't need it after all.
if (lazily_archived_thread_.Equals(ThreadId::Current())) {
lazily_archived_thread_ = ThreadId::Invalid();
- ASSERT(Isolate::CurrentPerIsolateThreadData()->thread_state() ==
- lazily_archived_thread_state_);
+ Isolate::PerIsolateThreadData* per_thread =
+ isolate_->FindPerThreadDataForThisThread();
+ ASSERT(per_thread != NULL);
+ ASSERT(per_thread->thread_state() == lazily_archived_thread_state_);
lazily_archived_thread_state_->set_id(ThreadId::Invalid());
lazily_archived_thread_state_->LinkInto(ThreadState::FREE_LIST);
lazily_archived_thread_state_ = NULL;
- Isolate::CurrentPerIsolateThreadData()->set_thread_state(NULL);
+ per_thread->set_thread_state(NULL);
return true;
}
EagerlyArchiveThread();
}
Isolate::PerIsolateThreadData* per_thread =
- Isolate::CurrentPerIsolateThreadData();
+ isolate_->FindPerThreadDataForThisThread();
if (per_thread == NULL || per_thread->thread_state() == NULL) {
// This is a new thread.
isolate_->stack_guard()->InitThread(access);
char* from = state->data();
from = isolate_->handle_scope_implementer()->RestoreThread(from);
from = isolate_->RestoreThread(from);
- from = Relocatable::RestoreState(from);
+ from = Relocatable::RestoreState(isolate_, from);
#ifdef ENABLE_DEBUGGER_SUPPORT
from = isolate_->debug()->RestoreDebug(from);
#endif
void ThreadManager::ArchiveThread() {
ASSERT(lazily_archived_thread_.Equals(ThreadId::Invalid()));
ASSERT(!IsArchived());
+ ASSERT(IsLockedByCurrentThread());
ThreadState* state = GetFreeThreadState();
state->Unlink();
- Isolate::CurrentPerIsolateThreadData()->set_thread_state(state);
+ Isolate::PerIsolateThreadData* per_thread =
+ isolate_->FindOrAllocatePerThreadDataForThisThread();
+ per_thread->set_thread_state(state);
lazily_archived_thread_ = ThreadId::Current();
lazily_archived_thread_state_ = state;
ASSERT(state->id().Equals(ThreadId::Invalid()));
void ThreadManager::EagerlyArchiveThread() {
+ ASSERT(IsLockedByCurrentThread());
ThreadState* state = lazily_archived_thread_state_;
state->LinkInto(ThreadState::IN_USE_LIST);
char* to = state->data();
// in ThreadManager::Iterate(ObjectVisitor*).
to = isolate_->handle_scope_implementer()->ArchiveThread(to);
to = isolate_->ArchiveThread(to);
- to = Relocatable::ArchiveState(to);
+ to = Relocatable::ArchiveState(isolate_, to);
#ifdef ENABLE_DEBUGGER_SUPPORT
to = isolate_->debug()->ArchiveDebug(to);
#endif
bool ThreadManager::IsArchived() {
- Isolate::PerIsolateThreadData* data = Isolate::CurrentPerIsolateThreadData();
+ Isolate::PerIsolateThreadData* data =
+ isolate_->FindPerThreadDataForThisThread();
return data != NULL && data->thread_state() != NULL;
}
-
void ThreadManager::Iterate(ObjectVisitor* v) {
// Expecting no threads during serialization/deserialization
for (ThreadState* state = FirstThreadStateInUse();
'test-list.cc',
'test-liveedit.cc',
'test-lock.cc',
+ 'test-lockers.cc',
'test-log-utils.cc',
'test-log.cc',
'test-mark-compact.cc',
'test-list.cc',
'test-liveedit.cc',
'test-lock.cc',
+ 'test-lockers.cc',
'test-log.cc',
'test-log-utils.cc',
'test-mark-compact.cc',
#include "v8.h"
#include "api.h"
+#include "isolate.h"
#include "compilation-cache.h"
#include "execution.h"
#include "snapshot.h"
isolate2->Dispose();
}
+TEST(IsolateDifferentContexts) {
+ v8::Isolate* isolate = v8::Isolate::New();
+ Persistent<v8::Context> context;
+ {
+ v8::Isolate::Scope isolate_scope(isolate);
+ v8::HandleScope handle_scope;
+ context = v8::Context::New();
+ v8::Context::Scope context_scope(context);
+ Local<Value> v = CompileRun("2");
+ CHECK(v->IsNumber());
+ CHECK_EQ(2, static_cast<int>(v->NumberValue()));
+ }
+ {
+ v8::Isolate::Scope isolate_scope(isolate);
+ v8::HandleScope handle_scope;
+ context = v8::Context::New();
+ v8::Context::Scope context_scope(context);
+ Local<Value> v = CompileRun("22");
+ CHECK(v->IsNumber());
+ CHECK_EQ(22, static_cast<int>(v->NumberValue()));
+ }
+}
class InitDefaultIsolateThread : public v8::internal::Thread {
public:
--- /dev/null
+// 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 "v8.h"
+
+#include "api.h"
+#include "isolate.h"
+#include "compilation-cache.h"
+#include "execution.h"
+#include "snapshot.h"
+#include "platform.h"
+#include "utils.h"
+#include "cctest.h"
+#include "parser.h"
+#include "unicode-inl.h"
+
+using ::v8::AccessorInfo;
+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;
+
+namespace i = ::i;
+
+
+
+
+// Migrating an isolate
+class KangarooThread : public v8::internal::Thread {
+ public:
+ KangarooThread(v8::Isolate* isolate,
+ v8::Handle<v8::Context> context, int value)
+ : Thread(NULL, "KangarooThread"),
+ isolate_(isolate), context_(context), value_(value) {
+ }
+
+ void Run() {
+ {
+ v8::Locker locker(isolate_);
+ v8::Isolate::Scope isolate_scope(isolate_);
+ CHECK_EQ(isolate_, v8::internal::Isolate::Current());
+ v8::HandleScope scope;
+ v8::Context::Scope context_scope(context_);
+ Local<Value> v = CompileRun("getValue()");
+ CHECK(v->IsNumber());
+ CHECK_EQ(30, static_cast<int>(v->NumberValue()));
+ }
+ {
+ v8::Locker locker(isolate_);
+ v8::Isolate::Scope isolate_scope(isolate_);
+ v8::Context::Scope context_scope(context_);
+ v8::HandleScope scope;
+ Local<Value> v = CompileRun("getValue()");
+ CHECK(v->IsNumber());
+ CHECK_EQ(30, static_cast<int>(v->NumberValue()));
+ }
+ isolate_->Dispose();
+ }
+
+ private:
+ v8::Isolate* isolate_;
+ Persistent<v8::Context> context_;
+ int value_;
+};
+
+// Migrates an isolate from one thread to another
+TEST(KangarooIsolates) {
+ v8::Isolate* isolate = v8::Isolate::New();
+ Persistent<v8::Context> context;
+ {
+ v8::Locker locker(isolate);
+ v8::Isolate::Scope isolate_scope(isolate);
+ v8::HandleScope handle_scope;
+ context = v8::Context::New();
+ v8::Context::Scope context_scope(context);
+ CHECK_EQ(isolate, v8::internal::Isolate::Current());
+ CompileRun("function getValue() { return 30; }");
+ }
+ KangarooThread thread1(isolate, context, 1);
+ thread1.Start();
+ thread1.Join();
+}
+
+static void CalcFibAndCheck() {
+ 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()));
+}
+
+class JoinableThread {
+ public:
+ explicit JoinableThread(const char* name)
+ : name_(name),
+ semaphore_(i::OS::CreateSemaphore(0)),
+ thread_(this) {
+ }
+
+ virtual ~JoinableThread() {
+ delete semaphore_;
+ }
+
+ void Start() {
+ thread_.Start();
+ }
+
+ void Join() {
+ semaphore_->Wait();
+ }
+
+ virtual void Run() = 0;
+ private:
+ class ThreadWithSemaphore : public i::Thread {
+ public:
+ explicit ThreadWithSemaphore(JoinableThread* joinable_thread)
+ : Thread(NULL, joinable_thread->name_),
+ joinable_thread_(joinable_thread) {
+ }
+
+ virtual void Run() {
+ joinable_thread_->Run();
+ joinable_thread_->semaphore_->Signal();
+ }
+
+ private:
+ JoinableThread* joinable_thread_;
+ };
+
+ const char* name_;
+ i::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;
+ LocalContext local_context;
+ CHECK_EQ(isolate_, v8::internal::Isolate::Current());
+ CalcFibAndCheck();
+ }
+ 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) {
+ const int kNThreads = 100;
+ i::List<JoinableThread*> threads(kNThreads);
+ v8::Isolate* isolate = v8::Isolate::New();
+ for (int i = 0; i < kNThreads; i++) {
+ threads.Add(new IsolateLockingThreadWithLocalContext(isolate));
+ }
+ StartJoinAndDeleteThreads(threads);
+ isolate->Dispose();
+}
+
+class IsolateNonlockingThread : public JoinableThread {
+ public:
+ explicit IsolateNonlockingThread()
+ : JoinableThread("IsolateNonlockingThread") {
+ }
+
+ virtual void Run() {
+ v8::Isolate* isolate = v8::Isolate::New();
+ {
+ v8::Isolate::Scope isolate_scope(isolate);
+ v8::HandleScope handle_scope;
+ v8::Handle<v8::Context> context = v8::Context::New();
+ v8::Context::Scope context_scope(context);
+ CHECK_EQ(isolate, v8::internal::Isolate::Current());
+ CalcFibAndCheck();
+ }
+ isolate->Dispose();
+ }
+ private:
+};
+
+// Run many threads each accessing its own isolate without locking
+TEST(MultithreadedParallelIsolates) {
+ const int kNThreads = 50;
+ i::List<JoinableThread*> threads(kNThreads);
+ for (int i = 0; i < kNThreads; i++) {
+ threads.Add(new IsolateNonlockingThread());
+ }
+ StartJoinAndDeleteThreads(threads);
+}
+
+
+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;
+ LocalContext local_context;
+ {
+ v8::Locker another_lock(isolate_);
+ CalcFibAndCheck();
+ }
+ {
+ v8::Locker another_lock(isolate_);
+ CalcFibAndCheck();
+ }
+ }
+ private:
+ v8::Isolate* isolate_;
+};
+
+// Run many threads with nested locks
+TEST(IsolateNestedLocking) {
+ const int kNThreads = 100;
+ v8::Isolate* isolate = v8::Isolate::New();
+ i::List<JoinableThread*> threads(kNThreads);
+ for (int i = 0; i < kNThreads; i++) {
+ threads.Add(new IsolateNestedLockingThread(isolate));
+ }
+ StartJoinAndDeleteThreads(threads);
+}
+
+
+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;
+ LocalContext local_context;
+
+ IsolateLockingThreadWithLocalContext threadB(isolate2_);
+ threadB.Start();
+ CalcFibAndCheck();
+ threadB.Join();
+ }
+ private:
+ v8::Isolate* isolate1_;
+ v8::Isolate* isolate2_;
+};
+
+// Run parallel threads that lock and access different isolates in parallel
+TEST(SeparateIsolatesLocksNonexclusive) {
+ const int kNThreads = 100;
+ v8::Isolate* isolate1 = v8::Isolate::New();
+ v8::Isolate* isolate2 = v8::Isolate::New();
+ 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::Handle<v8::Context> context)
+ : JoinableThread("LockIsolateAndCalculateFibThread"),
+ isolate_(isolate),
+ context_(context) {
+ }
+
+ virtual void Run() {
+ v8::Locker lock(isolate_);
+ v8::Isolate::Scope isolate_scope(isolate_);
+ HandleScope handle_scope;
+ v8::Context::Scope context_scope(context_);
+ CalcFibAndCheck();
+ }
+ 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() {
+ v8::Locker lock(isolate_);
+ v8::Isolate::Scope isolate_scope(isolate_);
+ v8::HandleScope handle_scope;
+ v8::Handle<v8::Context> context = v8::Context::New();
+ {
+ v8::Context::Scope context_scope(context);
+ CalcFibAndCheck();
+ }
+ {
+ isolate_->Exit();
+ v8::Unlocker unlocker(isolate_);
+ LockIsolateAndCalculateFibSharedContextThread thread(isolate_, context);
+ thread.Start();
+ thread.Join();
+ }
+ isolate_->Enter();
+ {
+ v8::Context::Scope context_scope(context);
+ CalcFibAndCheck();
+ }
+ }
+ private:
+ v8::Isolate* isolate_;
+};
+
+// Use unlocker inside of a Locker, multiple threads.
+TEST(LockerUnlocker) {
+ const int kNThreads = 100;
+ i::List<JoinableThread*> threads(kNThreads);
+ v8::Isolate* isolate = v8::Isolate::New();
+ 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;
+ v8::Handle<v8::Context> context = v8::Context::New();
+ {
+ v8::Context::Scope context_scope(context);
+ CalcFibAndCheck();
+ }
+ {
+ v8::Locker second_lock(isolate_);
+ {
+ isolate_->Exit();
+ v8::Unlocker unlocker(isolate_);
+ LockIsolateAndCalculateFibSharedContextThread thread(isolate_, context);
+ thread.Start();
+ thread.Join();
+ }
+ }
+ isolate_->Enter();
+ {
+ v8::Context::Scope context_scope(context);
+ CalcFibAndCheck();
+ }
+ }
+ private:
+ v8::Isolate* isolate_;
+};
+
+// Use Unlocker inside two Lockers.
+TEST(LockTwiceAndUnlock) {
+ const int kNThreads = 100;
+ i::List<JoinableThread*> threads(kNThreads);
+ v8::Isolate* isolate = v8::Isolate::New();
+ 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() {
+ Persistent<v8::Context> context1;
+ Persistent<v8::Context> context2;
+ v8::Locker lock1(isolate1_);
+ CHECK(v8::Locker::IsLocked(isolate1_));
+ CHECK(!v8::Locker::IsLocked(isolate2_));
+ {
+ v8::Isolate::Scope isolate_scope(isolate1_);
+ v8::HandleScope handle_scope;
+ context1 = v8::Context::New();
+ {
+ v8::Context::Scope context_scope(context1);
+ CalcFibAndCheck();
+ }
+ }
+ v8::Locker lock2(isolate2_);
+ CHECK(v8::Locker::IsLocked(isolate1_));
+ CHECK(v8::Locker::IsLocked(isolate2_));
+ {
+ v8::Isolate::Scope isolate_scope(isolate2_);
+ v8::HandleScope handle_scope;
+ context2 = v8::Context::New();
+ {
+ v8::Context::Scope context_scope(context2);
+ CalcFibAndCheck();
+ }
+ }
+ {
+ v8::Unlocker unlock1(isolate1_);
+ CHECK(!v8::Locker::IsLocked(isolate1_));
+ CHECK(v8::Locker::IsLocked(isolate2_));
+ v8::Isolate::Scope isolate_scope(isolate2_);
+ v8::HandleScope handle_scope;
+ v8::Context::Scope context_scope(context2);
+ LockIsolateAndCalculateFibSharedContextThread thread(isolate1_, context1);
+ thread.Start();
+ CalcFibAndCheck();
+ thread.Join();
+ }
+ }
+ private:
+ v8::Isolate* isolate1_;
+ v8::Isolate* isolate2_;
+};
+
+// Lock two isolates and unlock one of them.
+TEST(LockAndUnlockDifferentIsolates) {
+ v8::Isolate* isolate1 = v8::Isolate::New();
+ v8::Isolate* isolate2 = v8::Isolate::New();
+ LockAndUnlockDifferentIsolatesThread thread(isolate1, isolate2);
+ thread.Start();
+ thread.Join();
+ isolate2->Dispose();
+ isolate1->Dispose();
+}
+
+class LockUnlockLockThread : public JoinableThread {
+ public:
+ LockUnlockLockThread(v8::Isolate* isolate, v8::Handle<v8::Context> context)
+ : JoinableThread("LockUnlockLockThread"),
+ isolate_(isolate),
+ context_(context) {
+ }
+
+ virtual void Run() {
+ v8::Locker lock1(isolate_);
+ CHECK(v8::Locker::IsLocked(isolate_));
+ CHECK(!v8::Locker::IsLocked());
+ {
+ v8::Isolate::Scope isolate_scope(isolate_);
+ v8::HandleScope handle_scope;
+ v8::Context::Scope context_scope(context_);
+ CalcFibAndCheck();
+ }
+ {
+ v8::Unlocker unlock1(isolate_);
+ CHECK(!v8::Locker::IsLocked(isolate_));
+ CHECK(!v8::Locker::IsLocked());
+ {
+ v8::Locker lock2(isolate_);
+ v8::Isolate::Scope isolate_scope(isolate_);
+ v8::HandleScope handle_scope;
+ CHECK(v8::Locker::IsLocked(isolate_));
+ CHECK(!v8::Locker::IsLocked());
+ v8::Context::Scope context_scope(context_);
+ CalcFibAndCheck();
+ }
+ }
+ }
+
+ private:
+ v8::Isolate* isolate_;
+ v8::Persistent<v8::Context> context_;
+};
+
+// Locker inside an Unlocker inside a Locker.
+TEST(LockUnlockLockMultithreaded) {
+ const int kNThreads = 100;
+ v8::Isolate* isolate = v8::Isolate::New();
+ Persistent<v8::Context> context;
+ {
+ v8::Locker locker_(isolate);
+ v8::Isolate::Scope isolate_scope(isolate);
+ v8::HandleScope handle_scope;
+ context = v8::Context::New();
+ }
+ i::List<JoinableThread*> threads(kNThreads);
+ for (int i = 0; i < kNThreads; i++) {
+ threads.Add(new LockUnlockLockThread(isolate, context));
+ }
+ StartJoinAndDeleteThreads(threads);
+}
+
+class LockUnlockLockDefaultIsolateThread : public JoinableThread {
+ public:
+ LockUnlockLockDefaultIsolateThread(v8::Handle<v8::Context> context)
+ : JoinableThread("LockUnlockLockDefaultIsolateThread"),
+ context_(context) {
+ }
+
+ virtual void Run() {
+ v8::Locker lock1;
+ {
+ v8::HandleScope handle_scope;
+ v8::Context::Scope context_scope(context_);
+ CalcFibAndCheck();
+ }
+ {
+ v8::Unlocker unlock1;
+ {
+ v8::Locker lock2;
+ v8::HandleScope handle_scope;
+ v8::Context::Scope context_scope(context_);
+ CalcFibAndCheck();
+ }
+ }
+ }
+
+ private:
+ v8::Persistent<v8::Context> context_;
+};
+
+// Locker inside an Unlocker inside a Locker for default isolate.
+TEST(LockUnlockLockDefaultIsolateMultithreaded) {
+ const int kNThreads = 100;
+ Persistent<v8::Context> context;
+ {
+ v8::Locker locker_;
+ v8::HandleScope handle_scope;
+ context = v8::Context::New();
+ }
+ i::List<JoinableThread*> threads(kNThreads);
+ for (int i = 0; i < kNThreads; i++) {
+ threads.Add(new LockUnlockLockDefaultIsolateThread(context));
+ }
+ StartJoinAndDeleteThreads(threads);
+}
projects / platform / upstream / v8.git / commitdiff