From 1bf1084f2b10c3b47fd1a588d85d21ed0eb41d0c Mon Sep 17 00:00:00 2001
From: Lorry Tar Creator <lorry-tar-importer@lorry>
Date: Tue, 27 Jun 2017 06:07:23 +0000
Subject: webkitgtk-2.16.5

---
 Source/JavaScriptCore/dfg/DFGPlan.h | 76 ++++++++++++++++++++++++-------------
 1 file changed, 49 insertions(+), 27 deletions(-)

(limited to 'Source/JavaScriptCore/dfg/DFGPlan.h')

diff --git a/Source/JavaScriptCore/dfg/DFGPlan.h b/Source/JavaScriptCore/dfg/DFGPlan.h
index a60269798..4bff13c89 100644
--- a/Source/JavaScriptCore/dfg/DFGPlan.h
+++ b/Source/JavaScriptCore/dfg/DFGPlan.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
@@ -23,91 +23,113 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
-#ifndef DFGPlan_h
-#define DFGPlan_h
-
-#include <wtf/Platform.h>
+#pragma once
 
 #include "CompilationResult.h"
 #include "DFGCompilationKey.h"
 #include "DFGCompilationMode.h"
 #include "DFGDesiredIdentifiers.h"
-#include "DFGDesiredStructureChains.h"
 #include "DFGDesiredTransitions.h"
 #include "DFGDesiredWatchpoints.h"
 #include "DFGDesiredWeakReferences.h"
-#include "DFGDesiredWriteBarriers.h"
 #include "DFGFinalizer.h"
 #include "DeferredCompilationCallback.h"
 #include "Operands.h"
 #include "ProfilerCompilation.h"
+#include <wtf/HashMap.h>
 #include <wtf/ThreadSafeRefCounted.h>
+#include <wtf/text/CString.h>
 
 namespace JSC {
 
 class CodeBlock;
+class SlotVisitor;
 
 namespace DFG {
 
 class LongLivedState;
+class ThreadData;
 
 #if ENABLE(DFG_JIT)
 
 struct Plan : public ThreadSafeRefCounted<Plan> {
     Plan(
-        PassRefPtr<CodeBlock>, CompilationMode, unsigned osrEntryBytecodeIndex,
+        CodeBlock* codeBlockToCompile, CodeBlock* profiledDFGCodeBlock,
+        CompilationMode, unsigned osrEntryBytecodeIndex,
         const Operands<JSValue>& mustHandleValues);
     ~Plan();
-    
-    void compileInThread(LongLivedState&);
+
+    void compileInThread(LongLivedState&, ThreadData*);
     
     CompilationResult finalizeWithoutNotifyingCallback();
     void finalizeAndNotifyCallback();
     
+    void notifyCompiling();
     void notifyReady();
     
     CompilationKey key();
     
-    VM& vm;
-    RefPtr<CodeBlock> codeBlock;
+    void markCodeBlocks(SlotVisitor&);
+    template<typename Func>
+    void iterateCodeBlocksForGC(const Func&);
+    void checkLivenessAndVisitChildren(SlotVisitor&);
+    bool isKnownToBeLiveDuringGC();
+    void cancel();
+
+    bool canTierUpAndOSREnter() const { return !tierUpAndOSREnterBytecodes.isEmpty(); }
+    
+    void cleanMustHandleValuesIfNecessary();
+    
+    // Warning: pretty much all of the pointer fields in this object get nulled by cancel(). So, if
+    // you're writing code that is callable on the cancel path, be sure to null check everything!
+    
+    VM* vm;
+
+    // These can be raw pointers because we visit them during every GC in checkLivenessAndVisitChildren.
+    CodeBlock* codeBlock;
+    CodeBlock* profiledDFGCodeBlock;
+
     CompilationMode mode;
     const unsigned osrEntryBytecodeIndex;
     Operands<JSValue> mustHandleValues;
+    bool mustHandleValuesMayIncludeGarbage { true };
+    Lock mustHandleValueCleaningLock;
+    
+    ThreadData* threadData;
 
     RefPtr<Profiler::Compilation> compilation;
 
-    OwnPtr<Finalizer> finalizer;
+    std::unique_ptr<Finalizer> finalizer;
     
+    RefPtr<InlineCallFrameSet> inlineCallFrames;
     DesiredWatchpoints watchpoints;
     DesiredIdentifiers identifiers;
-    DesiredStructureChains chains;
     DesiredWeakReferences weakReferences;
-    DesiredWriteBarriers writeBarriers;
     DesiredTransitions transitions;
-
-    double beforeFTL;
     
-    bool isCompiled;
+    bool willTryToTierUp { false };
+
+    HashMap<unsigned, Vector<unsigned>> tierUpInLoopHierarchy;
+    Vector<unsigned> tierUpAndOSREnterBytecodes;
+
+    enum Stage { Preparing, Compiling, Ready, Cancelled };
+    Stage stage;
 
     RefPtr<DeferredCompilationCallback> callback;
 
 private:
-    enum CompilationPath { FailPath, DFGPath, FTLPath };
+    bool computeCompileTimes() const;
+    bool reportCompileTimes() const;
+    
+    enum CompilationPath { FailPath, DFGPath, FTLPath, CancelPath };
     CompilationPath compileInThreadImpl(LongLivedState&);
     
     bool isStillValid();
     void reallyAdd(CommonData*);
-};
-
-#else // ENABLE(DFG_JIT)
 
-class Plan : public RefCounted<Plan> {
-    // Dummy class to allow !ENABLE(DFG_JIT) to build.
+    double m_timeBeforeFTL;
 };
 
 #endif // ENABLE(DFG_JIT)
 
 } } // namespace JSC::DFG
-
-#endif // DFGPlan_h
-
-- 
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