JSValue JSScope::resolve(ExecState* exec, JSScope* scope, const Identifier& ident)
{
ScopeChainIterator end = scope->end();
ScopeChainIterator it = scope->begin();
while (1) {
JSObject* object = it.get();
if (++it == end) // Global scope.
return object;
if (object->hasProperty(exec, ident))
return object;
}
}
EncodedJSValue DFG_OPERATION operationResolve(ExecState* exec, Identifier* propertyName)
{
ScopeChainNode* scopeChain = exec->scopeChain();
ScopeChainIterator iter = scopeChain->begin();
ScopeChainIterator end = scopeChain->end();
ASSERT(iter != end);
do {
JSObject* record = iter->get();
PropertySlot slot(record);
if (record->getPropertySlot(exec, *propertyName, slot))
return JSValue::encode(slot.getValue(exec, *propertyName));
} while (++iter != end);
return throwVMError(exec, createUndefinedVariableError(exec, *propertyName));
}
void ScopeChainNode::print()
{
ScopeChainIterator scopeEnd = end();
for (ScopeChainIterator scopeIter = begin(); scopeIter != scopeEnd; ++scopeIter) {
JSObject* o = scopeIter->get();
PropertyNameArray propertyNames(globalObject->globalExec());
o->methodTable()->getPropertyNames(o, globalObject->globalExec(), propertyNames, ExcludeDontEnumProperties);
PropertyNameArray::const_iterator propEnd = propertyNames.end();
dataLog("----- [scope %p] -----\n", o);
for (PropertyNameArray::const_iterator propIter = propertyNames.begin(); propIter != propEnd; propIter++) {
Identifier name = *propIter;
dataLog("%s, ", name.ustring().utf8().data());
}
dataLog("\n");
}
}
void ScopeChainNode::print()
{
ScopeChainIterator scopeEnd = end();
for (ScopeChainIterator scopeIter = begin(); scopeIter != scopeEnd; ++scopeIter) {
JSObject* o = scopeIter->get();
PropertyNameArray propertyNames(globalObject->globalExec());
o->getPropertyNames(globalObject->globalExec(), propertyNames);
PropertyNameArray::const_iterator propEnd = propertyNames.end();
fprintf(stderr, "----- [scope %p] -----\n", o);
for (PropertyNameArray::const_iterator propIter = propertyNames.begin(); propIter != propEnd; propIter++) {
Identifier name = *propIter;
fprintf(stderr, "%s, ", name.ustring().utf8().data());
}
fprintf(stderr, "\n");
}
}
JSObject* JSScope::resolve(ExecState* exec, JSScope* scope, const Identifier& ident)
{
ScopeChainIterator end = scope->end();
ScopeChainIterator it = scope->begin();
while (1) {
JSScope* scope = it.scope();
JSObject* object = it.get();
if (++it == end) // Global scope.
return object;
if (object->hasProperty(exec, ident)) {
if (!isUnscopable(exec, scope, object, ident))
return object;
ASSERT_WITH_MESSAGE(!exec->hadException(), "When an exception occurs, the result of isUnscopable becomes false");
}
}
}
JSValue JSJavaScriptCallFrame::scopeChain(ExecState* exec) const
{
if (!impl()->scopeChain())
return jsNull();
ScopeChainNode* scopeChain = impl()->scopeChain();
ScopeChainIterator iter = scopeChain->begin();
ScopeChainIterator end = scopeChain->end();
// we must always have something in the scope chain
ASSERT(iter != end);
MarkedArgumentBuffer list;
do {
list.append(iter->get());
++iter;
} while (iter != end);
return constructArray(exec, globalObject(), list);
}
JSValue JSJavaScriptCallFrame::scopeType(ExecState* exec)
{
if (!impl().scopeChain())
return jsUndefined();
if (!exec->argument(0).isInt32())
return jsUndefined();
int index = exec->argument(0).asInt32();
JSScope* scopeChain = impl().scopeChain();
ScopeChainIterator end = scopeChain->end();
// FIXME: We should be identifying and returning CATCH_SCOPE appropriately.
bool foundLocalScope = false;
for (ScopeChainIterator iter = scopeChain->begin(); iter != end; ++iter) {
JSObject* scope = iter.get();
if (scope->isActivationObject()) {
if (!foundLocalScope) {
// First activation object is local scope, each successive activation object is closure.
if (!index)
return jsNumber(JSJavaScriptCallFrame::LOCAL_SCOPE);
foundLocalScope = true;
} else if (!index)
return jsNumber(JSJavaScriptCallFrame::CLOSURE_SCOPE);
}
if (!index) {
// Last in the chain is global scope.
if (++iter == end)
return jsNumber(JSJavaScriptCallFrame::GLOBAL_SCOPE);
return jsNumber(JSJavaScriptCallFrame::WITH_SCOPE);
}
--index;
}
ASSERT_NOT_REACHED();
return jsUndefined();
}
JSObject* JSScope::resolve(ExecState* exec, JSScope* scope, const Identifier& ident)
{
VM& vm = exec->vm();
auto throwScope = DECLARE_THROW_SCOPE(vm);
ScopeChainIterator end = scope->end();
ScopeChainIterator it = scope->begin();
while (1) {
JSScope* scope = it.scope();
JSObject* object = it.get();
// Global scope.
if (++it == end) {
JSScope* globalScopeExtension = scope->globalObject(vm)->globalScopeExtension();
if (UNLIKELY(globalScopeExtension)) {
bool hasProperty = object->hasProperty(exec, ident);
RETURN_IF_EXCEPTION(throwScope, nullptr);
if (hasProperty)
return object;
JSObject* extensionScopeObject = JSScope::objectAtScope(globalScopeExtension);
hasProperty = extensionScopeObject->hasProperty(exec, ident);
RETURN_IF_EXCEPTION(throwScope, nullptr);
if (hasProperty)
return extensionScopeObject;
}
return object;
}
bool hasProperty = object->hasProperty(exec, ident);
RETURN_IF_EXCEPTION(throwScope, nullptr);
if (hasProperty) {
bool unscopable = isUnscopable(exec, scope, object, ident);
ASSERT(!throwScope.exception() || !unscopable);
if (!unscopable)
return object;
}
}
}
JSValue JSJavaScriptCallFrame::scopeType(ExecState* exec)
{
if (!impl()->scopeChain())
return jsUndefined();
if (!exec->argument(0).isInt32())
return jsUndefined();
int index = exec->argument(0).asInt32();
ScopeChainNode* scopeChain = impl()->scopeChain();
ScopeChainIterator end = scopeChain->end();
bool foundLocalScope = false;
for (ScopeChainIterator iter = scopeChain->begin(); iter != end; ++iter) {
JSObject* scope = iter->get();
if (scope->isActivationObject()) {
if (!foundLocalScope) {
// First activation object is local scope, each successive activation object is closure.
if (!index)
return jsJavaScriptCallFrameLOCAL_SCOPE(exec, JSValue(), Identifier());
foundLocalScope = true;
} else if (!index)
return jsJavaScriptCallFrameCLOSURE_SCOPE(exec, JSValue(), Identifier());
}
if (!index) {
// Last in the chain is global scope.
if (++iter == end)
return jsJavaScriptCallFrameGLOBAL_SCOPE(exec, JSValue(), Identifier());
return jsJavaScriptCallFrameWITH_SCOPE(exec, JSValue(), Identifier());
}
--index;
}
return jsUndefined();
}
