Parallel and concurrent sweeping.

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index 60e3379e15a4d848aad2fed45fdadd58c14d7354..5cbfc7be916d8450f45c04dba5f301311c0b60e5 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -1692,6 +1692,7 @@ Isolate::Isolate()
 #undef ISOLATE_INIT_ARRAY_EXECUTE
 }
 
+
 void Isolate::TearDown() {
   TRACE_ISOLATE(tear_down);
 
@@ -1727,6 +1728,17 @@ void Isolate::Deinit() {
   if (state_ == INITIALIZED) {
     TRACE_ISOLATE(deinit);
 
+    if (FLAG_concurrent_sweeping || FLAG_parallel_sweeping) {
+      for (int i = 0; i < FLAG_sweeper_threads; i++) {
+        sweeper_thread_[i]->Stop();
+      }
+
+      for (int i = 0; i < FLAG_sweeper_threads; i++) {
+        delete sweeper_thread_[i];
+      }
+      delete[] sweeper_thread_;
+    }
+
     if (FLAG_parallel_recompilation) optimizing_compiler_thread_.Stop();
 
     if (FLAG_hydrogen_stats) HStatistics::Instance()->Print();
@@ -2089,6 +2101,17 @@ bool Isolate::Init(Deserializer* des) {
   }
 
   if (FLAG_parallel_recompilation) optimizing_compiler_thread_.Start();
+
+  if (FLAG_parallel_sweeping || FLAG_concurrent_sweeping) {
+    if (FLAG_sweeper_threads < 1) {
+      FLAG_sweeper_threads = 1;
+    }
+    sweeper_thread_ = new SweeperThread*[FLAG_sweeper_threads];
+    for (int i = 0; i < FLAG_sweeper_threads; i++) {
+      sweeper_thread_[i] = new SweeperThread(this);
+      sweeper_thread_[i]->Start();
+    }
+  }
   return true;
 }