Remove static initializer from isolate

We don't have a default isolate anymore, so we can just create the
thread data and keys on demand

BUG=none
R=dcarney@chromium.org, svenpanne@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/337603010

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22105 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/isolate.cc

@@ -46,6 +46,7 @@ int ThreadId::AllocateThreadId() {
 
 
 int ThreadId::GetCurrentThreadId() {
+  Isolate::EnsureInitialized();
   int thread_id = base::Thread::GetThreadLocalInt(Isolate::thread_id_key_);
   if (thread_id == 0) {
     thread_id = AllocateThreadId();
@@ -104,24 +105,17 @@ base::Thread::LocalStorageKey Isolate::per_isolate_thread_data_key_;
 #ifdef DEBUG
 base::Thread::LocalStorageKey PerThreadAssertScopeBase::thread_local_key;
 #endif  // DEBUG
-base::Mutex Isolate::process_wide_mutex_;
-// TODO(dcarney): Remove with default isolate.
-enum DefaultIsolateStatus {
-  kDefaultIsolateUninitialized,
-  kDefaultIsolateInitialized,
-  kDefaultIsolateCrashIfInitialized
-};
-static DefaultIsolateStatus default_isolate_status_
-    = kDefaultIsolateUninitialized;
+base::LazyMutex Isolate::process_wide_mutex_ = LAZY_MUTEX_INITIALIZER;
 Isolate::ThreadDataTable* Isolate::thread_data_table_ = NULL;
 base::Atomic32 Isolate::isolate_counter_ = 0;
 
 Isolate::PerIsolateThreadData*
     Isolate::FindOrAllocatePerThreadDataForThisThread() {
+  EnsureInitialized();
   ThreadId thread_id = ThreadId::Current();
   PerIsolateThreadData* per_thread = NULL;
   {
-    base::LockGuard<base::Mutex> lock_guard(&process_wide_mutex_);
+    base::LockGuard<base::Mutex> lock_guard(process_wide_mutex_.Pointer());
     per_thread = thread_data_table_->Lookup(this, thread_id);
     if (per_thread == NULL) {
       per_thread = new PerIsolateThreadData(this, thread_id);
@@ -141,25 +135,18 @@ Isolate::PerIsolateThreadData* Isolate::FindPerThreadDataForThisThread() {
 
 Isolate::PerIsolateThreadData* Isolate::FindPerThreadDataForThread(
     ThreadId thread_id) {
+  EnsureInitialized();
   PerIsolateThreadData* per_thread = NULL;
   {
-    base::LockGuard<base::Mutex> lock_guard(&process_wide_mutex_);
+    base::LockGuard<base::Mutex> lock_guard(process_wide_mutex_.Pointer());
     per_thread = thread_data_table_->Lookup(this, thread_id);
   }
   return per_thread;
 }
 
 
-void Isolate::SetCrashIfDefaultIsolateInitialized() {
-  base::LockGuard<base::Mutex> lock_guard(&process_wide_mutex_);
-  CHECK(default_isolate_status_ != kDefaultIsolateInitialized);
-  default_isolate_status_ = kDefaultIsolateCrashIfInitialized;
-}
-
-
-void Isolate::EnsureDefaultIsolate() {
-  base::LockGuard<base::Mutex> lock_guard(&process_wide_mutex_);
-  CHECK(default_isolate_status_ != kDefaultIsolateCrashIfInitialized);
+void Isolate::EnsureInitialized() {
+  base::LockGuard<base::Mutex> lock_guard(process_wide_mutex_.Pointer());
   if (thread_data_table_ == NULL) {
     isolate_key_ = base::Thread::CreateThreadLocalKey();
     thread_id_key_ = base::Thread::CreateThreadLocalKey();
@@ -172,12 +159,6 @@ void Isolate::EnsureDefaultIsolate() {
   }
 }
 
-struct StaticInitializer {
-  StaticInitializer() {
-    Isolate::EnsureDefaultIsolate();
-  }
-} static_initializer;
-
 
 Address Isolate::get_address_from_id(Isolate::AddressId id) {
   return isolate_addresses_[id];
@@ -1527,7 +1508,7 @@ void Isolate::TearDown() {
 
   Deinit();
 
-  { base::LockGuard<base::Mutex> lock_guard(&process_wide_mutex_);
+  { base::LockGuard<base::Mutex> lock_guard(process_wide_mutex_.Pointer());
     thread_data_table_->RemoveAllThreads(this);
   }
 
@@ -1628,6 +1609,7 @@ void Isolate::PushToPartialSnapshotCache(Object* obj) {
 
 void Isolate::SetIsolateThreadLocals(Isolate* isolate,
                                      PerIsolateThreadData* data) {
+  EnsureInitialized();
   base::Thread::SetThreadLocal(isolate_key_, isolate);
   base::Thread::SetThreadLocal(per_isolate_thread_data_key_, data);
 }

src/isolate.h

@@ -486,13 +486,6 @@ class Isolate {
 
   static void GlobalTearDown();
 
-  static void SetCrashIfDefaultIsolateInitialized();
-  // Ensures that process-wide resources and the default isolate have been
-  // allocated. It is only necessary to call this method in rare cases, for
-  // example if you are using V8 from within the body of a static initializer.
-  // 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();
@@ -1090,6 +1083,8 @@ class Isolate {
   void CountUsage(v8::Isolate::UseCounterFeature feature);
 
  private:
+  static void EnsureInitialized();
+
   Isolate();
 
   friend struct GlobalState;
@@ -1149,7 +1144,7 @@ class Isolate {
   };
 
   // This mutex protects highest_thread_id_ and thread_data_table_.
-  static base::Mutex process_wide_mutex_;
+  static base::LazyMutex process_wide_mutex_;
 
   static base::Thread::LocalStorageKey per_isolate_thread_data_key_;
   static base::Thread::LocalStorageKey isolate_key_;

src/mksnapshot.cc

@@ -317,7 +317,6 @@ void DumpException(Handle<Message> message) {
 
 int main(int argc, char** argv) {
   V8::InitializeICU();
-  i::Isolate::SetCrashIfDefaultIsolateInitialized();
   i::CpuFeatures::Probe(true);
 
   // By default, log code create information in the snapshot.

test/cctest/cctest.cc

@@ -138,7 +138,6 @@ static void SuggestTestHarness(int tests) {
 
 int main(int argc, char* argv[]) {
   v8::V8::InitializeICU();
-  i::Isolate::SetCrashIfDefaultIsolateInitialized();
 
   v8::internal::FlagList::SetFlagsFromCommandLine(&argc, argv, true);
 

tools/check-static-initializers.sh

@@ -32,8 +32,7 @@
 # Allow:
 #  - _GLOBAL__I__ZN2v810LineEditor6first_E
 #  - _GLOBAL__I__ZN2v88internal32AtomicOps_Internalx86CPUFeaturesE
-#  - _GLOBAL__I__ZN2v88internal8ThreadId18highest_thread_id_E
-expected_static_init_count=3
+expected_static_init_count=2
 
 v8_root=$(readlink -f $(dirname $BASH_SOURCE)/../)