-[JSC] Updated to latest version from WebKit's GIT

-[JSC] Made Objective-C bridge compatible with iOS 5 and 6
-[JSC] Changed some code to not use private frameworks, a bit slower but "legal"
-[JSC] Now builds armv7 and armv7s sliced binary.

Author: Dario Segura

JavaScriptCore/API/APICallbackFunction.h

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef APICallbackFunction_h
+#define APICallbackFunction_h
+
+#include "APICast.h"
+#include "APIShims.h"
+#include "Error.h"
+#include <wtf/Vector.h>
+
+namespace JSC {
+
+struct APICallbackFunction {
+
+template <typename T> static EncodedJSValue JSC_HOST_CALL call(ExecState*);
+
+};
+
+template <typename T>
+EncodedJSValue JSC_HOST_CALL APICallbackFunction::call(ExecState* exec)
+{
+    JSContextRef execRef = toRef(exec);
+    JSObjectRef functionRef = toRef(exec->callee());
+    JSObjectRef thisObjRef = toRef(jsCast<JSObject*>(exec->hostThisValue().toThis(exec, NotStrictMode)));
+
+    int argumentCount = static_cast<int>(exec->argumentCount());
+    Vector<JSValueRef, 16> arguments;
+    arguments.reserveInitialCapacity(argumentCount);
+    for (int i = 0; i < argumentCount; i++)
+        arguments.uncheckedAppend(toRef(exec, exec->argument(i)));
+
+    JSValueRef exception = 0;
+    JSValueRef result;
+    {
+        APICallbackShim callbackShim(exec);
+        result = jsCast<T*>(toJS(functionRef))->m_callback(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception);
+    }
+    if (exception)
+        exec->vm().throwException(exec, toJS(exec, exception));
+
+    // result must be a valid JSValue.
+    if (!result)
+        return JSValue::encode(jsUndefined());
+
+    return JSValue::encode(toJS(exec, result));
+}
+} // namespace JSC
+
+#endif // APICallbackFunction_h

JavaScriptCore/API/APICast.h

@@ -27,14 +27,13 @@
 #define APICast_h
 
 #include "JSAPIValueWrapper.h"
+#include "JSCJSValue.h"
 #include "JSGlobalObject.h"
-#include "JSValue.h"
-#include <wtf/UnusedParam.h>
 
 namespace JSC {
     class ExecState;
     class PropertyNameArray;
-    class JSGlobalData;
+    class VM;
     class JSObject;
     class JSValue;
 }
@@ -63,46 +62,63 @@ inline JSC::ExecState* toJS(JSGlobalContextRef c)
 inline JSC::JSValue toJS(JSC::ExecState* exec, JSValueRef v)
 {
     ASSERT_UNUSED(exec, exec);
-    ASSERT(v);
 #if USE(JSVALUE32_64)
     JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));
     if (!jsCell)
-        return JSC::JSValue();
+        return JSC::jsNull();
+    JSC::JSValue result;
     if (jsCell->isAPIValueWrapper())
-        return JSC::jsCast<JSC::JSAPIValueWrapper*>(jsCell)->value();
-    return jsCell;
+        result = JSC::jsCast<JSC::JSAPIValueWrapper*>(jsCell)->value();
+    else
+        result = jsCell;
 #else
-    return JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));
+    JSC::JSValue result = JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));
 #endif
+    if (!result)
+        return JSC::jsNull();
+    if (result.isCell())
+        RELEASE_ASSERT(result.asCell()->methodTable());
+    return result;
 }
 
 inline JSC::JSValue toJSForGC(JSC::ExecState* exec, JSValueRef v)
 {
     ASSERT_UNUSED(exec, exec);
-    ASSERT(v);
 #if USE(JSVALUE32_64)
     JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));
     if (!jsCell)
         return JSC::JSValue();
-    return jsCell;
+    JSC::JSValue result = jsCell;
 #else
-    return JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));
+    JSC::JSValue result = JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));
 #endif
+    if (result && result.isCell())
+        RELEASE_ASSERT(result.asCell()->methodTable());
+    return result;
 }
 
-inline JSC::JSObject* toJS(JSObjectRef o)
+// Used in JSObjectGetPrivate as that may be called during finalization
+inline JSC::JSObject* uncheckedToJS(JSObjectRef o)
 {
     return reinterpret_cast<JSC::JSObject*>(o);
 }
 
+inline JSC::JSObject* toJS(JSObjectRef o)
+{
+    JSC::JSObject* object = uncheckedToJS(o);
+    if (object)
+        RELEASE_ASSERT(object->methodTable());
+    return object;
+}
+
 inline JSC::PropertyNameArray* toJS(JSPropertyNameAccumulatorRef a)
 {
     return reinterpret_cast<JSC::PropertyNameArray*>(a);
 }
 
-inline JSC::JSGlobalData* toJS(JSContextGroupRef g)
+inline JSC::VM* toJS(JSContextGroupRef g)
 {
-    return reinterpret_cast<JSC::JSGlobalData*>(const_cast<OpaqueJSContextGroup*>(g));
+    return reinterpret_cast<JSC::VM*>(const_cast<OpaqueJSContextGroup*>(g));
 }
 
 inline JSValueRef toRef(JSC::ExecState* exec, JSC::JSValue v)
@@ -145,7 +161,7 @@ inline JSPropertyNameAccumulatorRef toRef(JSC::PropertyNameArray* l)
     return reinterpret_cast<JSPropertyNameAccumulatorRef>(l);
 }
 
-inline JSContextGroupRef toRef(JSC::JSGlobalData* g)
+inline JSContextGroupRef toRef(JSC::VM* g)
 {
     return reinterpret_cast<JSContextGroupRef>(g);
 }

JavaScriptCore/API/APIShims.h

@@ -28,97 +28,75 @@
 
 #include "CallFrame.h"
 #include "GCActivityCallback.h"
+#include "IncrementalSweeper.h"
 #include "JSLock.h"
 #include <wtf/WTFThreadData.h>
 
 namespace JSC {
 
 class APIEntryShimWithoutLock {
-public:
-    enum RefGlobalDataTag { DontRefGlobalData = 0, RefGlobalData };
-
 protected:
-    APIEntryShimWithoutLock(JSGlobalData* globalData, bool registerThread, RefGlobalDataTag shouldRefGlobalData)
-        : m_shouldRefGlobalData(shouldRefGlobalData)
-        , m_globalData(globalData)
-        , m_entryIdentifierTable(wtfThreadData().setCurrentIdentifierTable(globalData->identifierTable))
+    APIEntryShimWithoutLock(VM* vm, bool registerThread)
+        : m_vm(vm)
+        , m_entryIdentifierTable(wtfThreadData().setCurrentIdentifierTable(vm->identifierTable))
     {
-        if (shouldRefGlobalData)
-            m_globalData->ref();
-        UNUSED_PARAM(registerThread);
         if (registerThread)
-            globalData->heap.machineThreads().addCurrentThread();
-        m_globalData->heap.activityCallback()->synchronize();
+            vm->heap.machineThreads().addCurrentThread();
     }
 
     ~APIEntryShimWithoutLock()
     {
         wtfThreadData().setCurrentIdentifierTable(m_entryIdentifierTable);
-        if (m_shouldRefGlobalData)
-            m_globalData->deref();
     }
 
 protected:
-    RefGlobalDataTag m_shouldRefGlobalData;
-    JSGlobalData* m_globalData;
+    RefPtr<VM> m_vm;
     IdentifierTable* m_entryIdentifierTable;
 };
 
 class APIEntryShim : public APIEntryShimWithoutLock {
 public:
     // Normal API entry
     APIEntryShim(ExecState* exec, bool registerThread = true)
-        : APIEntryShimWithoutLock(&exec->globalData(), registerThread, RefGlobalData)
+        : APIEntryShimWithoutLock(&exec->vm(), registerThread)
+        , m_lockHolder(exec->vm().exclusiveThread ? 0 : exec)
     {
-        init();
     }
 
-    // This constructor is necessary for HeapTimer to prevent it from accidentally resurrecting 
-    // the ref count of a "dead" JSGlobalData.
-    APIEntryShim(JSGlobalData* globalData, RefGlobalDataTag refGlobalData, bool registerThread = true)
-        : APIEntryShimWithoutLock(globalData, registerThread, refGlobalData)
+    // JSPropertyNameAccumulator only has a vm.
+    APIEntryShim(VM* vm, bool registerThread = true)
+        : APIEntryShimWithoutLock(vm, registerThread)
+        , m_lockHolder(vm->exclusiveThread ? 0 : vm)
     {
-        init();
-    }
-
-    // JSPropertyNameAccumulator only has a globalData.
-    APIEntryShim(JSGlobalData* globalData, bool registerThread = true)
-        : APIEntryShimWithoutLock(globalData, registerThread, RefGlobalData)
-    {
-        init();
     }
 
     ~APIEntryShim()
     {
-        m_globalData->timeoutChecker.stop();
-        m_globalData->apiLock().unlock();
+        // Destroying our JSLockHolder should also destroy the VM.
+        m_vm.clear();
     }
 
 private:
-    void init()
-    {
-        m_globalData->apiLock().lock();
-        m_globalData->timeoutChecker.start();
-    }
+    JSLockHolder m_lockHolder;
 };
 
 class APICallbackShim {
 public:
     APICallbackShim(ExecState* exec)
-        : m_dropAllLocks(exec)
-        , m_globalData(&exec->globalData())
+        : m_dropAllLocks(exec->vm().exclusiveThread ? 0 : exec)
+        , m_vm(&exec->vm())
     {
         wtfThreadData().resetCurrentIdentifierTable();
     }
 
     ~APICallbackShim()
     {
-        wtfThreadData().setCurrentIdentifierTable(m_globalData->identifierTable);
+        wtfThreadData().setCurrentIdentifierTable(m_vm->identifierTable);
     }
 
 private:
     JSLock::DropAllLocks m_dropAllLocks;
-    JSGlobalData* m_globalData;
+    VM* m_vm;
 };
 
 }

JavaScriptCore/API/JSAPIWrapperObject.h

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef JSAPIWrapperObject_h
+#define JSAPIWrapperObject_h
+
+#include "JSBase.h"
+#include "JSDestructibleObject.h"
+#include "WeakReferenceHarvester.h"
+
+#if JSC_OBJC_API_ENABLED
+
+namespace JSC {
+    
+class JSAPIWrapperObject : public JSDestructibleObject {
+public:
+    typedef JSDestructibleObject Base;
+    
+    void finishCreation(VM&);
+    static void visitChildren(JSCell*, JSC::SlotVisitor&);
+    
+    void* wrappedObject() { return m_wrappedObject; }
+    void setWrappedObject(void*);
+
+protected:
+    static const unsigned StructureFlags = OverridesVisitChildren | Base::StructureFlags;
+    
+    JSAPIWrapperObject(VM&, Structure*);
+
+private:
+    void* m_wrappedObject;
+};
+
+} // namespace JSC
+
+#endif // JSC_OBJC_API_ENABLED
+
+#endif // JSAPIWrapperObject_h