Added: trunk/Source/_javascript_Core/runtime/JSScope.cpp (0 => 126897)
--- trunk/Source/_javascript_Core/runtime/JSScope.cpp (rev 0)
+++ trunk/Source/_javascript_Core/runtime/JSScope.cpp 2012-08-28 18:05:25 UTC (rev 126897)
@@ -0,0 +1,227 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+#include "config.h"
+#include "JSScope.h"
+
+#include "JSActivation.h"
+#include "JSGlobalObject.h"
+#include "JSNameScope.h"
+
+namespace JSC {
+
+ASSERT_CLASS_FITS_IN_CELL(JSScope);
+
+bool JSScope::isDynamicScope(bool& requiresDynamicChecks) const
+{
+ switch (structure()->typeInfo().type()) {
+ case GlobalObjectType:
+ return static_cast<const JSGlobalObject*>(this)->isDynamicScope(requiresDynamicChecks);
+ case ActivationObjectType:
+ return static_cast<const JSActivation*>(this)->isDynamicScope(requiresDynamicChecks);
+ case NameScopeObjectType:
+ return static_cast<const JSNameScope*>(this)->isDynamicScope(requiresDynamicChecks);
+ default:
+ ASSERT_NOT_REACHED();
+ break;
+ }
+
+ return false;
+}
+
+JSValue JSScope::resolve(CallFrame* callFrame, const Identifier& identifier)
+{
+ ScopeChainNode* scopeChain = callFrame->scopeChain();
+ ASSERT(scopeChain);
+
+ do {
+ JSObject* scope = scopeChain->object.get();
+ PropertySlot slot(scope);
+ if (scope->getPropertySlot(callFrame, identifier, slot))
+ return slot.getValue(callFrame, identifier);
+ } while ((scopeChain = scopeChain->next.get()));
+
+ return throwError(callFrame, createUndefinedVariableError(callFrame, identifier));
+}
+
+JSValue JSScope::resolveSkip(CallFrame* callFrame, const Identifier& identifier, int skip)
+{
+ ScopeChainNode* scopeChain = callFrame->scopeChain();
+ ASSERT(scopeChain);
+
+ CodeBlock* codeBlock = callFrame->codeBlock();
+
+ bool checkTopLevel = codeBlock->codeType() == FunctionCode && codeBlock->needsFullScopeChain();
+ ASSERT(skip || !checkTopLevel);
+ if (checkTopLevel && skip--) {
+ if (callFrame->uncheckedR(codeBlock->activationRegister()).jsValue())
+ scopeChain = scopeChain->next.get();
+ }
+ while (skip--) {
+ scopeChain = scopeChain->next.get();
+ ASSERT(scopeChain);
+ }
+
+ do {
+ JSObject* scope = scopeChain->object.get();
+ PropertySlot slot(scope);
+ if (scope->getPropertySlot(callFrame, identifier, slot))
+ return slot.getValue(callFrame, identifier);
+ } while ((scopeChain = scopeChain->next.get()));
+
+ return throwError(callFrame, createUndefinedVariableError(callFrame, identifier));
+}
+
+JSValue JSScope::resolveGlobal(
+ CallFrame* callFrame,
+ const Identifier& identifier,
+ JSGlobalObject* globalObject,
+ WriteBarrierBase<Structure>* cachedStructure,
+ PropertyOffset* cachedOffset
+)
+{
+ if (globalObject->structure() == cachedStructure->get())
+ return globalObject->getDirectOffset(*cachedOffset);
+
+ PropertySlot slot(globalObject);
+ if (!globalObject->getPropertySlot(callFrame, identifier, slot))
+ return throwError(callFrame, createUndefinedVariableError(callFrame, identifier));
+
+ JSValue result = slot.getValue(callFrame, identifier);
+ if (callFrame->globalData().exception)
+ return JSValue();
+
+ if (slot.isCacheableValue() && !globalObject->structure()->isUncacheableDictionary() && slot.slotBase() == globalObject) {
+ cachedStructure->set(callFrame->globalData(), callFrame->codeBlock()->ownerExecutable(), globalObject->structure());
+ *cachedOffset = slot.cachedOffset();
+ }
+ return result;
+}
+
+JSValue JSScope::resolveGlobalDynamic(
+ CallFrame* callFrame,
+ const Identifier& identifier,
+ int skip,
+ WriteBarrierBase<Structure>* cachedStructure,
+ PropertyOffset* cachedOffset
+)
+{
+ ScopeChainNode* scopeChain = callFrame->scopeChain();
+ ASSERT(scopeChain);
+
+ CodeBlock* codeBlock = callFrame->codeBlock();
+
+ bool checkTopLevel = codeBlock->codeType() == FunctionCode && codeBlock->needsFullScopeChain();
+ ASSERT(skip || !checkTopLevel);
+ if (checkTopLevel && skip--) {
+ if (callFrame->uncheckedR(codeBlock->activationRegister()).jsValue())
+ scopeChain = scopeChain->next.get();
+ }
+ while (skip--) {
+ JSObject* scope = scopeChain->object.get();
+ if (!scope->hasCustomProperties())
+ continue;
+
+ PropertySlot slot(scope);
+ if (!scope->getPropertySlot(callFrame, identifier, slot))
+ continue;
+
+ JSValue result = slot.getValue(callFrame, identifier);
+ if (callFrame->globalData().exception)
+ return JSValue();
+ return result;
+ }
+
+ return resolveGlobal(callFrame, identifier, callFrame->lexicalGlobalObject(), cachedStructure, cachedOffset);
+}
+
+JSValue JSScope::resolveBase(CallFrame* callFrame, const Identifier& identifier, bool isStrict)
+{
+ ScopeChainNode* scopeChain = callFrame->scopeChain();
+ ASSERT(scopeChain);
+
+ do {
+ JSObject* scope = scopeChain->object.get();
+
+ PropertySlot slot(scope);
+ if (!scope->getPropertySlot(callFrame, identifier, slot))
+ continue;
+
+ return JSValue(scope);
+ } while ((scopeChain = scopeChain->next.get()));
+
+ if (!isStrict)
+ return callFrame->lexicalGlobalObject();
+
+ return throwError(callFrame, createErrorForInvalidGlobalAssignment(callFrame, identifier.ustring()));
+}
+
+JSValue JSScope::resolveWithBase(CallFrame* callFrame, const Identifier& identifier, Register* base)
+{
+ ScopeChainNode* scopeChain = callFrame->scopeChain();
+ ASSERT(scopeChain);
+
+ do {
+ JSObject* scope = scopeChain->object.get();
+
+ PropertySlot slot(scope);
+ if (!scope->getPropertySlot(callFrame, identifier, slot))
+ continue;
+
+ JSValue value = slot.getValue(callFrame, identifier);
+ if (callFrame->globalData().exception)
+ return JSValue();
+
+ *base = JSValue(scope);
+ return value;
+ } while ((scopeChain = scopeChain->next.get()));
+
+ return throwError(callFrame, createUndefinedVariableError(callFrame, identifier));
+}
+
+JSValue JSScope::resolveWithThis(CallFrame* callFrame, const Identifier& identifier, Register* base)
+{
+ ScopeChainNode* scopeChain = callFrame->scopeChain();
+ ASSERT(scopeChain);
+
+ do {
+ JSObject* scope = scopeChain->object.get();
+
+ PropertySlot slot(scope);
+ if (!scope->getPropertySlot(callFrame, identifier, slot))
+ continue;
+
+ JSValue value = slot.getValue(callFrame, identifier);
+ if (callFrame->globalData().exception)
+ return JSValue();
+
+ *base = scope->structure()->typeInfo().isEnvironmentRecord() ? jsUndefined() : JSValue(scope);
+ return value;
+ } while ((scopeChain = scopeChain->next.get()));
+
+ return throwError(callFrame, createUndefinedVariableError(callFrame, identifier));
+}
+
+} // namespace JSC
Added: trunk/Source/_javascript_Core/runtime/JSScope.h (0 => 126897)
--- trunk/Source/_javascript_Core/runtime/JSScope.h (rev 0)
+++ trunk/Source/_javascript_Core/runtime/JSScope.h 2012-08-28 18:05:25 UTC (rev 126897)
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2012 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 JSScope_h
+#define JSScope_h
+
+#include "JSObject.h"
+
+namespace JSC {
+
+class JSScope : public JSNonFinalObject {
+public:
+ typedef JSNonFinalObject Base;
+
+ static JSValue resolve(CallFrame*, const Identifier&);
+ static JSValue resolveSkip(CallFrame*, const Identifier&, int skip);
+ static JSValue resolveGlobal(
+ CallFrame*,
+ const Identifier&,
+ JSGlobalObject* globalObject,
+ WriteBarrierBase<Structure>* cachedStructure,
+ PropertyOffset* cachedOffset
+ );
+ static JSValue resolveGlobalDynamic(
+ CallFrame*,
+ const Identifier&,
+ int skip,
+ WriteBarrierBase<Structure>* cachedStructure,
+ PropertyOffset* cachedOffset
+ );
+ static JSValue resolveBase(CallFrame*, const Identifier&, bool isStrict);
+ static JSValue resolveWithBase(CallFrame*, const Identifier&, Register* base);
+ static JSValue resolveWithThis(CallFrame*, const Identifier&, Register* base);
+
+ bool isDynamicScope(bool& requiresDynamicChecks) const;
+
+protected:
+ JSScope(JSGlobalData&, Structure*);
+};
+
+inline JSScope::JSScope(JSGlobalData& globalData, Structure* structure)
+ : Base(globalData, structure)
+{
+}
+
+} // namespace JSC
+
+#endif // JSScope_h
