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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
// Qt-Security score:significant
#include "qv4script_p.h"
#include <private/qqmlengine_p.h>
#include <private/qqmljsast_p.h>
#include <private/qqmljsengine_p.h>
#include <private/qqmljslexer_p.h>
#include <private/qqmljsparser_p.h>
#include <private/qqmlsourcecoordinate_p.h>
#include <private/qv4context_p.h>
#include <private/qv4function_p.h>
#include <private/qv4mm_p.h>
#include <private/qv4profiling_p.h>
#include <private/qv4runtimecodegen_p.h>
#include <private/qv4scopedvalue_p.h>
#include <QtCore/qdebug.h>
#include <QtCore/qscopedvaluerollback.h>
#include <QtCore/qstring.h>
QT_BEGIN_NAMESPACE
using namespace QV4;
using namespace QQmlJS;
Script::Script(
ExecutionEngine *v4, QmlContext *qml,
const QQmlRefPointer<ExecutableCompilationUnit> &compilationUnit)
: m_compilationUnit(compilationUnit)
, m_context(v4->rootContext())
, m_parseAsBinding(true)
, m_inheritContext(true)
, m_parsed(true)
{
if (qml)
m_qmlContext.set(v4, *qml);
m_vmFunction.set(v4, compilationUnit ? compilationUnit->rootFunction() : nullptr);
}
Script::~Script()
{
}
void Script::parse()
{
if (m_parsed)
return;
m_parsed = true;
ExecutionEngine *v4 = m_context->engine();
Scope valueScope(v4);
QV4::Compiler::Module module(m_sourceFile, m_sourceFile, v4->debugger() != nullptr);
if (m_sourceCode.startsWith(QLatin1String("function("))) {
static const int snippetLength = 70;
v4->throwSyntaxError(
QLatin1String(
"Using function expressions as statements in scripts is not compliant "
"with the ECMAScript specification:"
"\n%1...\n"
"If you want a function expression, surround it by parentheses.")
.arg(QStringView{m_sourceCode}.left(snippetLength)));
return;
}
Engine ee, *engine = ⅇ
Lexer lexer(engine);
lexer.setCode(m_sourceCode, m_line, m_parseAsBinding);
Parser parser(engine);
const bool parsed = parser.parseProgram();
const auto diagnosticMessages = parser.diagnosticMessages();
for (const DiagnosticMessage &m : diagnosticMessages) {
if (m.isError()) {
valueScope.engine->throwSyntaxError(
m.message, m_sourceFile, m.loc.startLine, m.loc.startColumn);
return;
} else {
qWarning() << m_sourceFile << ':' << m.loc.startLine << ':' << m.loc.startColumn
<< ": warning: " << m.message;
}
}
if (parsed) {
using namespace AST;
Program *program = AST::cast<Program *>(parser.rootNode());
if (!program) {
// if parsing was successful, and we have no program, then
// we're done...:
return;
}
QV4::Compiler::JSUnitGenerator jsGenerator(&module);
RuntimeCodegen cg(v4, &jsGenerator, m_strictMode);
if (m_inheritContext)
cg.setUseFastLookups(false);
cg.generateFromProgram(m_sourceCode, program, &module, m_contextType);
if (v4->hasException)
return;
m_compilationUnit = v4->insertCompilationUnit(cg.generateCompilationUnit());
m_vmFunction.set(v4, m_compilationUnit->rootFunction());
}
if (!m_vmFunction) {
// ### FIX file/line number
ScopedObject error(valueScope, v4->newSyntaxErrorObject(QStringLiteral("Syntax error")));
v4->throwError(error);
}
}
ReturnedValue Script::run(const QV4::Value *thisObject)
{
if (!m_parsed)
parse();
if (!m_vmFunction)
return Encode::undefined();
QV4::ExecutionEngine *engine = m_context->engine();
QV4::Scope valueScope(engine);
if (m_qmlContext.isUndefined()) {
QScopedValueRollback<Function*> savedGlobalCode(engine->globalCode, m_vmFunction);
return m_vmFunction->call(thisObject ? thisObject : engine->globalObject, nullptr, 0,
m_context);
} else {
Scoped<QmlContext> qml(valueScope, m_qmlContext.value());
return m_vmFunction->call(thisObject, nullptr, 0, qml);
}
}
Function *Script::function()
{
if (!m_parsed)
parse();
return m_vmFunction;
}
QQmlRefPointer<QV4::CompiledData::CompilationUnit> Script::precompile(
QV4::Compiler::Module *module, QQmlJS::Engine *jsEngine,
Compiler::JSUnitGenerator *unitGenerator, const QString &fileName,
const QString &source, QList<QQmlError> *reportedErrors,
QV4::Compiler::ContextType contextType, InheritContext inheritContext)
{
using namespace QV4::Compiler;
using namespace QQmlJS::AST;
Lexer lexer(jsEngine);
lexer.setCode(source, /*line*/1, /*qml mode*/false);
Parser parser(jsEngine);
parser.parseProgram();
QList<QQmlError> errors
= QQmlEnginePrivate::qmlErrorFromDiagnostics(fileName, parser.diagnosticMessages());
if (!errors.isEmpty()) {
if (reportedErrors)
*reportedErrors << errors;
return nullptr;
}
Program *program = AST::cast<Program *>(parser.rootNode());
if (!program) {
// if parsing was successful, and we have no program, then
// we're done...:
return nullptr;
}
Codegen cg(unitGenerator, /*strict mode*/false);
if (inheritContext == InheritContext::Yes)
cg.setUseFastLookups(false);
cg.generateFromProgram(source, program, module, contextType);
if (cg.hasError()) {
if (reportedErrors) {
const auto v4Error = cg.error();
QQmlError error;
error.setUrl(cg.url());
error.setLine(qmlConvertSourceCoordinate<quint32, int>(v4Error.loc.startLine));
error.setColumn(qmlConvertSourceCoordinate<quint32, int>(v4Error.loc.startColumn));
error.setDescription(v4Error.message);
reportedErrors->append(error);
}
return nullptr;
}
return cg.generateCompilationUnit(/*generate unit data*/false);
}
QT_END_NAMESPACE