-
Jani Heikkinen authored
- Renamed LICENSE.LGPL to LICENSE.LGPLv21 - Added LICENSE.LGPLv3 & LICENSE.GPLv2 - Removed LICENSE.GPL Change-Id: I84a565e2e0caa3b76bf291a7d188a57a4b00e1b0 Reviewed-by:Jani Heikkinen <jani.heikkinen@digia.com>
e7ceacda
/******************************************************************************** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).** Contact: http://www.qt-project.org/legal**** This file is part of the QtQml module of the Qt Toolkit.**** $QT_BEGIN_LICENSE:LGPL21$** Commercial License Usage** Licensees holding valid commercial Qt licenses may use this file in** accordance with the commercial license agreement provided with the** Software or, alternatively, in accordance with the terms contained in** a written agreement between you and Digia. For licensing terms and** conditions see http://qt.digia.com/licensing. For further information** use the contact form at http://qt.digia.com/contact-us.**** GNU Lesser General Public License Usage** Alternatively, this file may be used under the terms of the GNU Lesser** General Public License version 2.1 or version 3 as published by the Free** Software Foundation and appearing in the file LICENSE.LGPLv21 and** LICENSE.LGPLv3 included in the packaging of this file. Please review the** following information to ensure the GNU Lesser General Public License** requirements will be met: https://www.gnu.org/licenses/lgpl.html and** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.**** In addition, as a special exception, Digia gives you certain additional** rights. These rights are described in the Digia Qt LGPL Exception** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.**** $QT_END_LICENSE$******************************************************************************/#include <QString>#include "qv4debugging_p.h"#include <qv4context_p.h>#include <qv4object_p.h>#include <qv4objectproto_p.h>#include "qv4mm_p.h"#include <qv4argumentsobject_p.h>#include "qv4function_p.h"#include "qv4errorobject_p.h"using namespace QV4;DEFINE_MANAGED_VTABLE(ExecutionContext);DEFINE_MANAGED_VTABLE(CallContext);DEFINE_MANAGED_VTABLE(WithContext);DEFINE_MANAGED_VTABLE(GlobalContext);HeapObject *ExecutionContext::newCallContext(FunctionObject *function, CallData *callData){ Q_ASSERT(function->function()); CallContext::Data *c = reinterpret_cast<CallContext::Data *>(d()->engine->memoryManager->allocManaged(requiredMemoryForExecutionContect(function, callData->argc))); new (c) CallContext::Data(d()->engine, Type_CallContext); c->function = function; c->realArgumentCount = callData->argc; c->strictMode = function->strictMode(); c->outer = function->scope(); c->activation = 0; c->compilationUnit = function->function()->compilationUnit; c->lookups = c->compilationUnit->runtimeLookups; c->locals = (Value *)((quintptr(c + 1) + 7) & ~7); const CompiledData::Function *compiledFunction = function->function()->compiledFunction;7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
int nLocals = compiledFunction->nLocals;
if (nLocals)
std::fill(c->locals, c->locals + nLocals, Primitive::undefinedValue());
c->callData = reinterpret_cast<CallData *>(c->locals + nLocals);
::memcpy(c->callData, callData, sizeof(CallData) + (callData->argc - 1) * sizeof(Value));
if (callData->argc < static_cast<int>(compiledFunction->nFormals))
std::fill(c->callData->args + c->callData->argc, c->callData->args + compiledFunction->nFormals, Primitive::undefinedValue());
c->callData->argc = qMax((uint)callData->argc, compiledFunction->nFormals);
return c;
}
WithContext *ExecutionContext::newWithContext(Object *with)
{
return d()->engine->memoryManager->alloc<WithContext>(d()->engine, with);
}
CatchContext *ExecutionContext::newCatchContext(String *exceptionVarName, const ValueRef exceptionValue)
{
return d()->engine->memoryManager->alloc<CatchContext>(d()->engine, exceptionVarName, exceptionValue);
}
CallContext *ExecutionContext::newQmlContext(FunctionObject *f, Object *qml)
{
CallContext *c = reinterpret_cast<CallContext*>(d()->engine->memoryManager->allocManaged(requiredMemoryForExecutionContect(f, 0)));
new (c->d()) CallContext::Data(d()->engine, qml, f);
return c;
}
void ExecutionContext::createMutableBinding(String *name, bool deletable)
{
Scope scope(this);
// find the right context to create the binding on
ScopedObject activation(scope, d()->engine->globalObject);
ExecutionContext *ctx = this;
while (ctx) {
if (ctx->d()->type >= Type_CallContext) {
CallContext *c = static_cast<CallContext *>(ctx);
if (!c->d()->activation)
c->d()->activation = d()->engine->newObject()->getPointer();
activation = c->d()->activation;
break;
}
ctx = ctx->d()->outer;
}
if (activation->hasProperty(name))
return;
Property desc(Primitive::undefinedValue());
PropertyAttributes attrs(Attr_Data);
attrs.setConfigurable(deletable);
activation->__defineOwnProperty__(this, name, desc, attrs);
}
GlobalContext::Data::Data(ExecutionEngine *eng)
: ExecutionContext::Data(eng, Type_GlobalContext)
{
global = eng->globalObject;
}
WithContext::Data::Data(ExecutionEngine *engine, Object *with)
: ExecutionContext::Data(engine, Type_WithContext)
{
callData = parent->d()->callData;
outer = parent;
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lookups = parent->d()->lookups;
compilationUnit = parent->d()->compilationUnit;
withObject = with;
}
CatchContext::Data::Data(ExecutionEngine *engine, String *exceptionVarName, const ValueRef exceptionValue)
: ExecutionContext::Data(engine, Type_CatchContext)
{
strictMode = parent->d()->strictMode;
callData = parent->d()->callData;
outer = parent;
lookups = parent->d()->lookups;
compilationUnit = parent->d()->compilationUnit;
this->exceptionVarName = exceptionVarName;
this->exceptionValue = exceptionValue;
}
CallContext::Data::Data(ExecutionEngine *engine, Object *qml, FunctionObject *function)
: ExecutionContext::Data(engine, Type_QmlContext)
{
this->function = function;
callData = reinterpret_cast<CallData *>(this + 1);
callData->tag = QV4::Value::_Integer_Type;
callData->argc = 0;
callData->thisObject = Primitive::undefinedValue();
strictMode = true;
outer = function->scope();
activation = qml;
if (function->function()) {
compilationUnit = function->function()->compilationUnit;
lookups = compilationUnit->runtimeLookups;
}
locals = (Value *)(this + 1);
if (function->varCount())
std::fill(locals, locals + function->varCount(), Primitive::undefinedValue());
}
String * const *CallContext::formals() const
{
return (d()->function && d()->function->function()) ? d()->function->function()->internalClass->nameMap.constData() : 0;
}
unsigned int CallContext::formalCount() const
{
return d()->function ? d()->function->formalParameterCount() : 0;
}
String * const *CallContext::variables() const
{
return (d()->function && d()->function->function()) ? d()->function->function()->internalClass->nameMap.constData() + d()->function->function()->compiledFunction->nFormals : 0;
}
unsigned int CallContext::variableCount() const
{
return d()->function ? d()->function->varCount() : 0;
}
bool ExecutionContext::deleteProperty(String *name)
{
Scope scope(this);
bool hasWith = false;
for (ExecutionContext *ctx = this; ctx; ctx = ctx->d()->outer) {
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if (ctx->d()->type == Type_WithContext) {
hasWith = true;
WithContext *w = static_cast<WithContext *>(ctx);
if (w->d()->withObject->hasProperty(name))
return w->d()->withObject->deleteProperty(name);
} else if (ctx->d()->type == Type_CatchContext) {
CatchContext *c = static_cast<CatchContext *>(ctx);
if (c->d()->exceptionVarName->isEqualTo(name))
return false;
} else if (ctx->d()->type >= Type_CallContext) {
CallContext *c = static_cast<CallContext *>(ctx);
FunctionObject *f = c->d()->function;
if (f->needsActivation() || hasWith) {
uint index = f->function()->internalClass->find(name);
if (index < UINT_MAX)
// ### throw in strict mode?
return false;
}
if (c->d()->activation && c->d()->activation->hasProperty(name))
return c->d()->activation->deleteProperty(name);
} else if (ctx->d()->type == Type_GlobalContext) {
GlobalContext *g = static_cast<GlobalContext *>(ctx);
if (g->d()->global->hasProperty(name))
return g->d()->global->deleteProperty(name);
}
}
if (d()->strictMode)
throwSyntaxError(QStringLiteral("Can't delete property %1").arg(name->toQString()));
return true;
}
bool CallContext::needsOwnArguments() const
{
return d()->function->needsActivation() || d()->callData->argc < static_cast<int>(d()->function->formalParameterCount());
}
void ExecutionContext::markObjects(Managed *m, ExecutionEngine *engine)
{
ExecutionContext *ctx = static_cast<ExecutionContext *>(m);
if (ctx->d()->outer)
ctx->d()->outer->mark(engine);
// ### shouldn't need these 3 lines
ctx->d()->callData->thisObject.mark(engine);
for (int arg = 0; arg < ctx->d()->callData->argc; ++arg)
ctx->d()->callData->args[arg].mark(engine);
if (ctx->d()->type >= Type_CallContext) {
QV4::CallContext *c = static_cast<CallContext *>(ctx);
for (unsigned local = 0, lastLocal = c->d()->function->varCount(); local < lastLocal; ++local)
c->d()->locals[local].mark(engine);
if (c->d()->activation)
c->d()->activation->mark(engine);
c->d()->function->mark(engine);
} else if (ctx->d()->type == Type_WithContext) {
WithContext *w = static_cast<WithContext *>(ctx);
w->d()->withObject->mark(engine);
} else if (ctx->d()->type == Type_CatchContext) {
CatchContext *c = static_cast<CatchContext *>(ctx);
c->d()->exceptionVarName->mark(engine);
c->d()->exceptionValue.mark(engine);
} else if (ctx->d()->type == Type_GlobalContext) {
GlobalContext *g = static_cast<GlobalContext *>(ctx);
g->d()->global->mark(engine);
}
}
void ExecutionContext::setProperty(String *name, const ValueRef value)
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{
Scope scope(this);
for (ExecutionContext *ctx = this; ctx; ctx = ctx->d()->outer) {
if (ctx->d()->type == Type_WithContext) {
ScopedObject w(scope, static_cast<WithContext *>(ctx)->d()->withObject);
if (w->hasProperty(name)) {
w->put(name, value);
return;
}
} else if (ctx->d()->type == Type_CatchContext && static_cast<CatchContext *>(ctx)->d()->exceptionVarName->isEqualTo(name)) {
static_cast<CatchContext *>(ctx)->d()->exceptionValue = *value;
return;
} else {
ScopedObject activation(scope, (Object *)0);
if (ctx->d()->type >= Type_CallContext) {
CallContext *c = static_cast<CallContext *>(ctx);
if (c->d()->function->function()) {
uint index = c->d()->function->function()->internalClass->find(name);
if (index < UINT_MAX) {
if (index < c->d()->function->formalParameterCount()) {
c->d()->callData->args[c->d()->function->formalParameterCount() - index - 1] = *value;
} else {
index -= c->d()->function->formalParameterCount();
c->d()->locals[index] = *value;
}
return;
}
}
activation = c->d()->activation;
} else if (ctx->d()->type == Type_GlobalContext) {
activation = static_cast<GlobalContext *>(ctx)->d()->global;
}
if (activation) {
if (ctx->d()->type == Type_QmlContext) {
activation->put(name, value);
return;
} else {
uint member = activation->internalClass()->find(name);
if (member < UINT_MAX) {
activation->putValue(activation->propertyAt(member), activation->internalClass()->propertyData[member], value);
return;
}
}
}
}
}
if (d()->strictMode || name->equals(d()->engine->id_this.getPointer())) {
ScopedValue n(scope, name->asReturnedValue());
throwReferenceError(n);
return;
}
d()->engine->globalObject->put(name, value);
}
ReturnedValue ExecutionContext::getProperty(String *name)
{
Scope scope(this);
ScopedValue v(scope);
name->makeIdentifier();
if (name->equals(d()->engine->id_this.getPointer()))
return d()->callData->thisObject.asReturnedValue();
bool hasWith = false;
bool hasCatchScope = false;
for (ExecutionContext *ctx = this; ctx; ctx = ctx->d()->outer) {
if (ctx->d()->type == Type_WithContext) {
ScopedObject w(scope, static_cast<WithContext *>(ctx)->d()->withObject);
hasWith = true;
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bool hasProperty = false;
v = w->get(name, &hasProperty);
if (hasProperty) {
return v.asReturnedValue();
}
continue;
}
else if (ctx->d()->type == Type_CatchContext) {
hasCatchScope = true;
CatchContext *c = static_cast<CatchContext *>(ctx);
if (c->d()->exceptionVarName->isEqualTo(name))
return c->d()->exceptionValue.asReturnedValue();
}
else if (ctx->d()->type >= Type_CallContext) {
QV4::CallContext *c = static_cast<CallContext *>(ctx);
ScopedFunctionObject f(scope, c->d()->function);
if (f->function() && (f->needsActivation() || hasWith || hasCatchScope)) {
uint index = f->function()->internalClass->find(name);
if (index < UINT_MAX) {
if (index < c->d()->function->formalParameterCount())
return c->d()->callData->args[c->d()->function->formalParameterCount() - index - 1].asReturnedValue();
return c->d()->locals[index - c->d()->function->formalParameterCount()].asReturnedValue();
}
}
if (c->d()->activation) {
bool hasProperty = false;
v = c->d()->activation->get(name, &hasProperty);
if (hasProperty)
return v.asReturnedValue();
}
if (f->function() && f->function()->isNamedExpression()
&& name->equals(f->function()->name()))
return f.asReturnedValue();
}
else if (ctx->d()->type == Type_GlobalContext) {
GlobalContext *g = static_cast<GlobalContext *>(ctx);
bool hasProperty = false;
v = g->d()->global->get(name, &hasProperty);
if (hasProperty)
return v.asReturnedValue();
}
}
ScopedValue n(scope, name);
return throwReferenceError(n);
}
ReturnedValue ExecutionContext::getPropertyAndBase(String *name, Object *&base)
{
Scope scope(this);
ScopedValue v(scope);
base = (Object *)0;
name->makeIdentifier();
if (name->equals(d()->engine->id_this.getPointer()))
return d()->callData->thisObject.asReturnedValue();
bool hasWith = false;
bool hasCatchScope = false;
for (ExecutionContext *ctx = this; ctx; ctx = ctx->d()->outer) {
if (ctx->d()->type == Type_WithContext) {
Object *w = static_cast<WithContext *>(ctx)->d()->withObject;
hasWith = true;
bool hasProperty = false;
v = w->get(name, &hasProperty);
if (hasProperty) {
base = w;
return v.asReturnedValue();
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}
continue;
}
else if (ctx->d()->type == Type_CatchContext) {
hasCatchScope = true;
CatchContext *c = static_cast<CatchContext *>(ctx);
if (c->d()->exceptionVarName->isEqualTo(name))
return c->d()->exceptionValue.asReturnedValue();
}
else if (ctx->d()->type >= Type_CallContext) {
QV4::CallContext *c = static_cast<CallContext *>(ctx);
FunctionObject *f = c->d()->function;
if (f->function() && (f->needsActivation() || hasWith || hasCatchScope)) {
uint index = f->function()->internalClass->find(name);
if (index < UINT_MAX) {
if (index < c->d()->function->formalParameterCount())
return c->d()->callData->args[c->d()->function->formalParameterCount() - index - 1].asReturnedValue();
return c->d()->locals[index - c->d()->function->formalParameterCount()].asReturnedValue();
}
}
if (c->d()->activation) {
bool hasProperty = false;
v = c->d()->activation->get(name, &hasProperty);
if (hasProperty) {
if (ctx->d()->type == Type_QmlContext)
base = c->d()->activation;
return v.asReturnedValue();
}
}
if (f->function() && f->function()->isNamedExpression()
&& name->equals(f->function()->name()))
return c->d()->function->asReturnedValue();
}
else if (ctx->d()->type == Type_GlobalContext) {
GlobalContext *g = static_cast<GlobalContext *>(ctx);
bool hasProperty = false;
v = g->d()->global->get(name, &hasProperty);
if (hasProperty)
return v.asReturnedValue();
}
}
ScopedValue n(scope, name);
return throwReferenceError(n);
}
ReturnedValue ExecutionContext::throwError(const ValueRef value)
{
return d()->engine->throwException(value);
}
ReturnedValue ExecutionContext::throwError(const QString &message)
{
Scope scope(this);
ScopedValue v(scope, d()->engine->newString(message));
v = d()->engine->newErrorObject(v);
return throwError(v);
}
ReturnedValue ExecutionContext::throwSyntaxError(const QString &message, const QString &fileName, int line, int column)
{
Scope scope(this);
Scoped<Object> error(scope, d()->engine->newSyntaxErrorObject(message, fileName, line, column));
return throwError(error);
}
ReturnedValue ExecutionContext::throwSyntaxError(const QString &message)
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{
Scope scope(this);
Scoped<Object> error(scope, d()->engine->newSyntaxErrorObject(message));
return throwError(error);
}
ReturnedValue ExecutionContext::throwTypeError()
{
Scope scope(this);
Scoped<Object> error(scope, d()->engine->newTypeErrorObject(QStringLiteral("Type error")));
return throwError(error);
}
ReturnedValue ExecutionContext::throwTypeError(const QString &message)
{
Scope scope(this);
Scoped<Object> error(scope, d()->engine->newTypeErrorObject(message));
return throwError(error);
}
ReturnedValue ExecutionContext::throwUnimplemented(const QString &message)
{
Scope scope(this);
ScopedValue v(scope, d()->engine->newString(QStringLiteral("Unimplemented ") + message));
v = d()->engine->newErrorObject(v);
return throwError(v);
}
ReturnedValue ExecutionContext::catchException(StackTrace *trace)
{
return d()->engine->catchException(this, trace);
}
ReturnedValue ExecutionContext::throwReferenceError(const ValueRef value)
{
Scope scope(this);
Scoped<String> s(scope, value->toString(this));
QString msg = s->toQString() + QStringLiteral(" is not defined");
Scoped<Object> error(scope, d()->engine->newReferenceErrorObject(msg));
return throwError(error);
}
ReturnedValue ExecutionContext::throwReferenceError(const QString &message, const QString &fileName, int line, int column)
{
Scope scope(this);
QString msg = message;
Scoped<Object> error(scope, d()->engine->newReferenceErrorObject(msg, fileName, line, column));
return throwError(error);
}
ReturnedValue ExecutionContext::throwRangeError(const ValueRef value)
{
Scope scope(this);
ScopedString s(scope, value->toString(this));
QString msg = s->toQString() + QStringLiteral(" out of range");
ScopedObject error(scope, d()->engine->newRangeErrorObject(msg));
return throwError(error);
}
ReturnedValue ExecutionContext::throwRangeError(const QString &message)
{
Scope scope(this);
ScopedObject error(scope, d()->engine->newRangeErrorObject(message));
return throwError(error);
}
ReturnedValue ExecutionContext::throwURIError(const ValueRef msg)
{
Scope scope(this);
ScopedObject error(scope, d()->engine->newURIErrorObject(msg));
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return throwError(error);
}