blob: e201b91f5301e7c03ebd444463e05b40534a29a4 [file] [log] [blame]
/*
* Copyright (C) 1999-2002 Harri Porten (porten@kde.org)
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca)
* Copyright (C) 2007 Maks Orlovich
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "Arguments.h"
#include "JSActivation.h"
#include "JSFunction.h"
#include "JSGlobalObject.h"
using namespace std;
namespace JSC {
ASSERT_CLASS_FITS_IN_CELL(Arguments);
const ClassInfo Arguments::s_info = { "Arguments", &JSNonFinalObject::s_info, 0, 0 };
Arguments::~Arguments()
{
if (d->extraArguments != d->extraArgumentsFixedBuffer)
delete [] d->extraArguments;
}
void Arguments::markChildren(MarkStack& markStack)
{
JSObject::markChildren(markStack);
if (d->registerArray)
markStack.appendValues(d->registerArray.get(), d->numParameters);
if (d->extraArguments) {
unsigned numExtraArguments = d->numArguments - d->numParameters;
markStack.appendValues(d->extraArguments, numExtraArguments);
}
markStack.append(&d->callee);
if (d->activation)
markStack.append(&d->activation);
}
void Arguments::copyToRegisters(ExecState* exec, Register* buffer, uint32_t maxSize)
{
if (UNLIKELY(d->overrodeLength)) {
unsigned length = min(get(exec, exec->propertyNames().length).toUInt32(exec), maxSize);
for (unsigned i = 0; i < length; i++)
buffer[i] = get(exec, i);
return;
}
if (LIKELY(!d->deletedArguments)) {
unsigned parametersLength = min(min(d->numParameters, d->numArguments), maxSize);
unsigned i = 0;
for (; i < parametersLength; ++i)
buffer[i] = d->registers[d->firstParameterIndex + i].get();
for (; i < d->numArguments; ++i)
buffer[i] = d->extraArguments[i - d->numParameters].get();
return;
}
unsigned parametersLength = min(min(d->numParameters, d->numArguments), maxSize);
unsigned i = 0;
for (; i < parametersLength; ++i) {
if (!d->deletedArguments[i])
buffer[i] = d->registers[d->firstParameterIndex + i].get();
else
buffer[i] = get(exec, i);
}
for (; i < d->numArguments; ++i) {
if (!d->deletedArguments[i])
buffer[i] = d->extraArguments[i - d->numParameters].get();
else
buffer[i] = get(exec, i);
}
}
void Arguments::fillArgList(ExecState* exec, MarkedArgumentBuffer& args)
{
if (UNLIKELY(d->overrodeLength)) {
unsigned length = get(exec, exec->propertyNames().length).toUInt32(exec);
for (unsigned i = 0; i < length; i++)
args.append(get(exec, i));
return;
}
if (LIKELY(!d->deletedArguments)) {
if (LIKELY(!d->numParameters)) {
args.initialize(d->extraArguments, d->numArguments);
return;
}
if (d->numParameters == d->numArguments) {
args.initialize(&d->registers[d->firstParameterIndex], d->numArguments);
return;
}
unsigned parametersLength = min(d->numParameters, d->numArguments);
unsigned i = 0;
for (; i < parametersLength; ++i)
args.append(d->registers[d->firstParameterIndex + i].get());
for (; i < d->numArguments; ++i)
args.append(d->extraArguments[i - d->numParameters].get());
return;
}
unsigned parametersLength = min(d->numParameters, d->numArguments);
unsigned i = 0;
for (; i < parametersLength; ++i) {
if (!d->deletedArguments[i])
args.append(d->registers[d->firstParameterIndex + i].get());
else
args.append(get(exec, i));
}
for (; i < d->numArguments; ++i) {
if (!d->deletedArguments[i])
args.append(d->extraArguments[i - d->numParameters].get());
else
args.append(get(exec, i));
}
}
bool Arguments::getOwnPropertySlot(ExecState* exec, unsigned i, PropertySlot& slot)
{
if (i < d->numArguments && (!d->deletedArguments || !d->deletedArguments[i])) {
if (i < d->numParameters) {
slot.setValue(d->registers[d->firstParameterIndex + i].get());
} else
slot.setValue(d->extraArguments[i - d->numParameters].get());
return true;
}
return JSObject::getOwnPropertySlot(exec, Identifier(exec, UString::number(i)), slot);
}
void Arguments::createStrictModeCallerIfNecessary(ExecState* exec)
{
if (d->overrodeCaller)
return;
d->overrodeCaller = true;
PropertyDescriptor descriptor;
JSValue thrower = createTypeErrorFunction(exec, "Unable to access caller of strict mode function");
descriptor.setAccessorDescriptor(thrower, thrower, DontEnum | DontDelete | Getter | Setter);
defineOwnProperty(exec, exec->propertyNames().caller, descriptor, false);
}
void Arguments::createStrictModeCalleeIfNecessary(ExecState* exec)
{
if (d->overrodeCallee)
return;
d->overrodeCallee = true;
PropertyDescriptor descriptor;
JSValue thrower = createTypeErrorFunction(exec, "Unable to access callee of strict mode function");
descriptor.setAccessorDescriptor(thrower, thrower, DontEnum | DontDelete | Getter | Setter);
defineOwnProperty(exec, exec->propertyNames().callee, descriptor, false);
}
bool Arguments::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
{
bool isArrayIndex;
unsigned i = propertyName.toArrayIndex(isArrayIndex);
if (isArrayIndex && i < d->numArguments && (!d->deletedArguments || !d->deletedArguments[i])) {
if (i < d->numParameters) {
slot.setValue(d->registers[d->firstParameterIndex + i].get());
} else
slot.setValue(d->extraArguments[i - d->numParameters].get());
return true;
}
if (propertyName == exec->propertyNames().length && LIKELY(!d->overrodeLength)) {
slot.setValue(jsNumber(d->numArguments));
return true;
}
if (propertyName == exec->propertyNames().callee && LIKELY(!d->overrodeCallee)) {
if (!d->isStrictMode) {
slot.setValue(d->callee.get());
return true;
}
createStrictModeCalleeIfNecessary(exec);
}
if (propertyName == exec->propertyNames().caller && d->isStrictMode)
createStrictModeCallerIfNecessary(exec);
return JSObject::getOwnPropertySlot(exec, propertyName, slot);
}
bool Arguments::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
{
bool isArrayIndex;
unsigned i = propertyName.toArrayIndex(isArrayIndex);
if (isArrayIndex && i < d->numArguments && (!d->deletedArguments || !d->deletedArguments[i])) {
if (i < d->numParameters) {
descriptor.setDescriptor(d->registers[d->firstParameterIndex + i].get(), DontEnum);
} else
descriptor.setDescriptor(d->extraArguments[i - d->numParameters].get(), DontEnum);
return true;
}
if (propertyName == exec->propertyNames().length && LIKELY(!d->overrodeLength)) {
descriptor.setDescriptor(jsNumber(d->numArguments), DontEnum);
return true;
}
if (propertyName == exec->propertyNames().callee && LIKELY(!d->overrodeCallee)) {
if (!d->isStrictMode) {
descriptor.setDescriptor(d->callee.get(), DontEnum);
return true;
}
createStrictModeCalleeIfNecessary(exec);
}
if (propertyName == exec->propertyNames().caller && d->isStrictMode)
createStrictModeCallerIfNecessary(exec);
return JSObject::getOwnPropertyDescriptor(exec, propertyName, descriptor);
}
void Arguments::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
if (mode == IncludeDontEnumProperties) {
for (unsigned i = 0; i < d->numArguments; ++i) {
if (!d->deletedArguments || !d->deletedArguments[i])
propertyNames.add(Identifier(exec, UString::number(i)));
}
propertyNames.add(exec->propertyNames().callee);
propertyNames.add(exec->propertyNames().length);
}
JSObject::getOwnPropertyNames(exec, propertyNames, mode);
}
void Arguments::put(ExecState* exec, unsigned i, JSValue value)
{
if (i < d->numArguments && (!d->deletedArguments || !d->deletedArguments[i])) {
if (i < d->numParameters)
d->registers[d->firstParameterIndex + i].set(exec->globalData(), d->activation ? static_cast<JSCell*>(d->activation.get()) : static_cast<JSCell*>(this), value);
else
d->extraArguments[i - d->numParameters].set(exec->globalData(), this, value);
return;
}
PutPropertySlot slot;
JSObject::put(exec, Identifier(exec, UString::number(i)), value, slot);
}
void Arguments::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
{
bool isArrayIndex;
unsigned i = propertyName.toArrayIndex(isArrayIndex);
if (isArrayIndex && i < d->numArguments && (!d->deletedArguments || !d->deletedArguments[i])) {
if (i < d->numParameters)
d->registers[d->firstParameterIndex + i].set(exec->globalData(), d->activation ? static_cast<JSCell*>(d->activation.get()) : static_cast<JSCell*>(this), value);
else
d->extraArguments[i - d->numParameters].set(exec->globalData(), this, value);
return;
}
if (propertyName == exec->propertyNames().length && !d->overrodeLength) {
d->overrodeLength = true;
putDirect(exec->globalData(), propertyName, value, DontEnum);
return;
}
if (propertyName == exec->propertyNames().callee && !d->overrodeCallee) {
if (!d->isStrictMode) {
d->overrodeCallee = true;
putDirect(exec->globalData(), propertyName, value, DontEnum);
return;
}
createStrictModeCalleeIfNecessary(exec);
}
if (propertyName == exec->propertyNames().caller && d->isStrictMode)
createStrictModeCallerIfNecessary(exec);
JSObject::put(exec, propertyName, value, slot);
}
bool Arguments::deleteProperty(ExecState* exec, unsigned i)
{
if (i < d->numArguments) {
if (!d->deletedArguments) {
d->deletedArguments = adoptArrayPtr(new bool[d->numArguments]);
memset(d->deletedArguments.get(), 0, sizeof(bool) * d->numArguments);
}
if (!d->deletedArguments[i]) {
d->deletedArguments[i] = true;
return true;
}
}
return JSObject::deleteProperty(exec, Identifier(exec, UString::number(i)));
}
bool Arguments::deleteProperty(ExecState* exec, const Identifier& propertyName)
{
bool isArrayIndex;
unsigned i = propertyName.toArrayIndex(isArrayIndex);
if (isArrayIndex && i < d->numArguments) {
if (!d->deletedArguments) {
d->deletedArguments = adoptArrayPtr(new bool[d->numArguments]);
memset(d->deletedArguments.get(), 0, sizeof(bool) * d->numArguments);
}
if (!d->deletedArguments[i]) {
d->deletedArguments[i] = true;
return true;
}
}
if (propertyName == exec->propertyNames().length && !d->overrodeLength) {
d->overrodeLength = true;
return true;
}
if (propertyName == exec->propertyNames().callee && !d->overrodeCallee) {
if (!d->isStrictMode) {
d->overrodeCallee = true;
return true;
}
createStrictModeCalleeIfNecessary(exec);
}
if (propertyName == exec->propertyNames().caller && !d->isStrictMode)
createStrictModeCallerIfNecessary(exec);
return JSObject::deleteProperty(exec, propertyName);
}
} // namespace JSC