Per-isolate v8::Locker and v8::Unlocker

test/cctest/test-lockers.cc

Index: test/cctest/test-lockers.cc
diff --git a/test/cctest/test-lockers.cc b/test/cctest/test-lockers.cc
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+// 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:
+  explicit 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);
+}