webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 59 insertions, 26 deletions

diff --git a/Source/JavaScriptCore/jit/GCAwareJITStubRoutine.cpp b/Source/JavaScriptCore/jit/GCAwareJITStubRoutine.cpp
index f681dd847..bab6de13b 100644
--- a/Source/JavaScriptCore/jit/GCAwareJITStubRoutine.cpp
+++ b/Source/JavaScriptCore/jit/GCAwareJITStubRoutine.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012 Apple Inc. All rights reserved.
+ * Copyright (C) 2012, 2016 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -28,24 +28,27 @@
 
 #if ENABLE(JIT)
 
+#include "CodeBlock.h"
+#include "DFGCommonData.h"
 #include "Heap.h"
 #include "VM.h"
-#include "Operations.h"
+#include "JITStubRoutineSet.h"
+#include "JSCInlines.h"
 #include "SlotVisitor.h"
 #include "Structure.h"
+#include <wtf/RefPtr.h>
 
 namespace JSC {
 
 GCAwareJITStubRoutine::GCAwareJITStubRoutine(
-    const MacroAssemblerCodeRef& code, VM& vm, bool isClosureCall)
+    const MacroAssemblerCodeRef& code, VM& vm)
     : JITStubRoutine(code)
     , m_mayBeExecuting(false)
     , m_isJettisoned(false)
-    , m_isClosureCall(isClosureCall)
 {
-    vm.heap.m_jitStubRoutines.add(this);
+    vm.heap.m_jitStubRoutines->add(this);
 }
-    
+
 GCAwareJITStubRoutine::~GCAwareJITStubRoutine() { }
 
 void GCAwareJITStubRoutine::observeZeroRefCount()
@@ -78,48 +81,78 @@ void GCAwareJITStubRoutine::markRequiredObjectsInternal(SlotVisitor&)
 {
 }
 
-MarkingGCAwareJITStubRoutineWithOneObject::MarkingGCAwareJITStubRoutineWithOneObject(
+MarkingGCAwareJITStubRoutine::MarkingGCAwareJITStubRoutine(
     const MacroAssemblerCodeRef& code, VM& vm, const JSCell* owner,
-    JSCell* object)
+    const Vector<JSCell*>& cells)
     : GCAwareJITStubRoutine(code, vm)
-    , m_object(vm, owner, object)
+    , m_cells(cells.size())
 {
+    for (unsigned i = cells.size(); i--;)
+        m_cells[i].set(vm, owner, cells[i]);
 }
 
-MarkingGCAwareJITStubRoutineWithOneObject::~MarkingGCAwareJITStubRoutineWithOneObject()
+MarkingGCAwareJITStubRoutine::~MarkingGCAwareJITStubRoutine()
 {
 }
 
-void MarkingGCAwareJITStubRoutineWithOneObject::markRequiredObjectsInternal(SlotVisitor& visitor)
+void MarkingGCAwareJITStubRoutine::markRequiredObjectsInternal(SlotVisitor& visitor)
 {
-    visitor.append(&m_object);
+    for (auto& entry : m_cells)
+        visitor.append(entry);
 }
 
-PassRefPtr<JITStubRoutine> createJITStubRoutine(
-    const MacroAssemblerCodeRef& code,
-    VM& vm,
-    const JSCell*,
-    bool makesCalls)
+
+GCAwareJITStubRoutineWithExceptionHandler::GCAwareJITStubRoutineWithExceptionHandler(
+    const MacroAssemblerCodeRef& code, VM& vm,  const JSCell* owner, const Vector<JSCell*>& cells,
+    CodeBlock* codeBlockForExceptionHandlers, CallSiteIndex exceptionHandlerCallSiteIndex)
+    : MarkingGCAwareJITStubRoutine(code, vm, owner, cells)
+    , m_codeBlockWithExceptionHandler(codeBlockForExceptionHandlers)
+    , m_exceptionHandlerCallSiteIndex(exceptionHandlerCallSiteIndex)
 {
-    if (!makesCalls)
-        return adoptRef(new JITStubRoutine(code));
+    RELEASE_ASSERT(m_codeBlockWithExceptionHandler);
+    ASSERT(!!m_codeBlockWithExceptionHandler->handlerForIndex(exceptionHandlerCallSiteIndex.bits()));
+}
 
-    return static_pointer_cast<JITStubRoutine>(
-        adoptRef(new GCAwareJITStubRoutine(code, vm)));
+void GCAwareJITStubRoutineWithExceptionHandler::aboutToDie()
+{
+    m_codeBlockWithExceptionHandler = nullptr;
 }
 
-PassRefPtr<JITStubRoutine> createJITStubRoutine(
+void GCAwareJITStubRoutineWithExceptionHandler::observeZeroRefCount()
+{
+#if ENABLE(DFG_JIT)
+    if (m_codeBlockWithExceptionHandler) {
+        m_codeBlockWithExceptionHandler->jitCode()->dfgCommon()->removeCallSiteIndex(m_exceptionHandlerCallSiteIndex);
+        m_codeBlockWithExceptionHandler->removeExceptionHandlerForCallSite(m_exceptionHandlerCallSiteIndex);
+        m_codeBlockWithExceptionHandler = nullptr;
+    }
+#endif
+
+    Base::observeZeroRefCount();
+}
+
+
+Ref<JITStubRoutine> createJITStubRoutine(
     const MacroAssemblerCodeRef& code,
     VM& vm,
     const JSCell* owner,
     bool makesCalls,
-    JSCell* object)
+    const Vector<JSCell*>& cells,
+    CodeBlock* codeBlockForExceptionHandlers,
+    CallSiteIndex exceptionHandlerCallSiteIndex)
 {
     if (!makesCalls)
-        return adoptRef(new JITStubRoutine(code));
+        return adoptRef(*new JITStubRoutine(code));
+    
+    if (codeBlockForExceptionHandlers) {
+        RELEASE_ASSERT(JITCode::isOptimizingJIT(codeBlockForExceptionHandlers->jitType()));
+        return adoptRef(*new GCAwareJITStubRoutineWithExceptionHandler(code, vm, owner, cells, codeBlockForExceptionHandlers, exceptionHandlerCallSiteIndex));
+    }
+
+    if (cells.isEmpty())
+        return adoptRef(*new GCAwareJITStubRoutine(code, vm));
     
-    return static_pointer_cast<JITStubRoutine>(
-        adoptRef(new MarkingGCAwareJITStubRoutineWithOneObject(code, vm, owner, object)));
+    return adoptRef(*new MarkingGCAwareJITStubRoutine(code, vm, owner, cells));
 }
 
 } // namespace JSC