webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 70 insertions, 29 deletions

diff --git a/Source/JavaScriptCore/dfg/DFGWorklist.h b/Source/JavaScriptCore/dfg/DFGWorklist.h
index d3419f0a9..eb8282cd4 100644
--- a/Source/JavaScriptCore/dfg/DFGWorklist.h
+++ b/Source/JavaScriptCore/dfg/DFGWorklist.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Apple Inc. All rights reserved.
+ * Copyright (C) 2013-2017 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -23,21 +23,24 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
-#ifndef DFGWorklist_h
-#define DFGWorklist_h
-
-#include <wtf/Platform.h>
-
-#if ENABLE(DFG_JIT)
+#pragma once
 
 #include "DFGPlan.h"
+#include "DFGThreadData.h"
+#include <wtf/AutomaticThread.h>
+#include <wtf/Condition.h>
 #include <wtf/Deque.h>
 #include <wtf/HashMap.h>
+#include <wtf/Lock.h>
 #include <wtf/Noncopyable.h>
-#include <wtf/PassOwnPtr.h>
-#include <wtf/ThreadingPrimitives.h>
 
-namespace JSC { namespace DFG {
+namespace JSC {
+
+class SlotVisitor;
+
+namespace DFG {
+
+#if ENABLE(DFG_JIT)
 
 class Worklist : public RefCounted<Worklist> {
 public:
@@ -45,15 +48,18 @@ public:
 
     ~Worklist();
     
-    static PassRefPtr<Worklist> create(unsigned numberOfThreads);
+    static Ref<Worklist> create(CString worklistName, unsigned numberOfThreads, int relativePriority = 0);
     
-    void enqueue(PassRefPtr<Plan>);
+    void enqueue(Ref<Plan>&&);
     
     // This is equivalent to:
     // worklist->waitUntilAllPlansForVMAreReady(vm);
     // worklist->completeAllReadyPlansForVM(vm);
     void completeAllPlansForVM(VM&);
-    
+
+    template<typename Func>
+    void iterateCodeBlocksForGC(VM&, const Func&);
+
     void waitUntilAllPlansForVMAreReady(VM&);
     State completeAllReadyPlansForVM(VM&, CompilationKey = CompilationKey());
     void removeAllReadyPlansForVM(VM&);
@@ -61,21 +67,38 @@ public:
     State compilationState(CompilationKey);
     
     size_t queueLength();
+    
+    void suspendAllThreads();
+    void resumeAllThreads();
+    
+    bool isActiveForVM(VM&) const;
+    
+    // Only called on the main thread after suspending all threads.
+    void visitWeakReferences(SlotVisitor&);
+    void removeDeadPlans(VM&);
+    
+    void removeNonCompilingPlansForVM(VM&);
+    
     void dump(PrintStream&) const;
     
 private:
-    Worklist();
-    void finishCreation(unsigned numberOfThreads);
+    Worklist(CString worklistName);
+    void finishCreation(unsigned numberOfThreads, int);
+    
+    class ThreadBody;
+    friend class ThreadBody;
     
-    void runThread();
+    void runThread(ThreadData*);
     static void threadFunction(void* argument);
     
     void removeAllReadyPlansForVM(VM&, Vector<RefPtr<Plan>, 8>&);
 
-    void dump(const MutexLocker&, PrintStream&) const;
-
+    void dump(const AbstractLocker&, PrintStream&) const;
+    
+    CString m_threadName;
+    
     // Used to inform the thread about what work there is left to do.
-    Deque<RefPtr<Plan>, 16> m_queue;
+    Deque<RefPtr<Plan>> m_queue;
     
     // Used to answer questions about the current state of a code block. This
     // is particularly great for the cti_optimize OSR slow path, which wants
@@ -87,22 +110,40 @@ private:
     // Used to quickly find which plans have been compiled and are ready to
     // be completed.
     Vector<RefPtr<Plan>, 16> m_readyPlans;
+
+    Lock m_suspensionLock;
+    
+    Box<Lock> m_lock;
+    RefPtr<AutomaticThreadCondition> m_planEnqueued;
+    Condition m_planCompiled;
     
-    mutable Mutex m_lock;
-    ThreadCondition m_planEnqueued;
-    ThreadCondition m_planCompiled;
-    Vector<ThreadIdentifier> m_threads;
+    Vector<std::unique_ptr<ThreadData>> m_threads;
     unsigned m_numberOfActiveThreads;
 };
 
-// For now we use a single global worklist. It's not clear that this
-// is the right thing to do, but it is what we do, for now. This function
-// will lazily create one when it's needed.
-Worklist* globalWorklist();
+// For DFGMode compilations.
+Worklist& ensureGlobalDFGWorklist();
+Worklist* existingGlobalDFGWorklistOrNull();
 
-} } // namespace JSC::DFG
+// For FTLMode and FTLForOSREntryMode compilations.
+Worklist& ensureGlobalFTLWorklist();
+Worklist* existingGlobalFTLWorklistOrNull();
+
+Worklist& ensureGlobalWorklistFor(CompilationMode);
+
+// Simplify doing things for all worklists.
+unsigned numberOfWorklists();
+Worklist& ensureWorklistForIndex(unsigned index);
+Worklist* existingWorklistForIndexOrNull(unsigned index);
+Worklist& existingWorklistForIndex(unsigned index);
 
 #endif // ENABLE(DFG_JIT)
 
-#endif // DFGWorklist_h
+void completeAllPlansForVM(VM&);
+void markCodeBlocks(VM&, SlotVisitor&);
+
+template<typename Func>
+void iterateCodeBlocksForGC(VM&, const Func&);
+
+} } // namespace JSC::DFG