TypePtr NewObjectExpression::inferTypes(AnalysisResultPtr ar, TypePtr type,
bool coerce) {
reset();
ConstructPtr self = shared_from_this();
if (!m_name.empty()) {
ClassScopePtr cls = ar->resolveClass(m_name);
if (cls) {
m_name = cls->getName();
}
if (!cls || cls->isRedeclaring()) {
if (cls) {
m_redeclared = true;
ar->getScope()->getVariables()->
setAttribute(VariableTable::NeedGlobalPointer);
}
if (!cls && ar->isFirstPass()) {
ar->getCodeError()->record(self, CodeError::UnknownClass, self);
}
if (m_params) m_params->inferAndCheck(ar, NEW_TYPE(Any), false);
return NEW_TYPE(Object);
}
if (cls->isVolatile()) {
ar->getScope()->getVariables()->
setAttribute(VariableTable::NeedGlobalPointer);
}
m_dynamic = cls->derivesFromRedeclaring();
m_validClass = true;
FunctionScopePtr func = cls->findConstructor(ar, true);
if (!func) {
if (m_params) {
if (!m_dynamic && m_params->getCount()) {
if (ar->isFirstPass()) {
ar->getCodeError()->record(self, CodeError::BadConstructorCall,
self);
}
m_params->setOutputCount(0);
}
m_params->inferAndCheck(ar, NEW_TYPE(Any), false);
}
} else {
m_extraArg = func->inferParamTypes(ar, self, m_params,
m_validClass);
m_variableArgument = func->isVariableArgument();
}
return Type::CreateObjectType(m_name);
} else {
ar->containsDynamicClass();
if (ar->isFirstPass()) {
ar->getCodeError()->record(self, CodeError::UseDynamicClass,
self);
}
if (m_params) {
m_params->markParams(false);
}
}
m_nameExp->inferAndCheck(ar, Type::String, false);
if (m_params) m_params->inferAndCheck(ar, NEW_TYPE(Any), false);
return Type::Variant;//NEW_TYPE(Object);
}
void ClassVariable::onParse(AnalysisResultPtr ar) {
ModifierExpressionPtr modifiers =
ar->getScope()->setModifiers(m_modifiers);
for (int i = 0; i < m_declaration->getCount(); i++) {
VariableTablePtr variables = ar->getScope()->getVariables();
ExpressionPtr exp = (*m_declaration)[i];
if (exp->is(Expression::KindOfAssignmentExpression)) {
AssignmentExpressionPtr assignment =
dynamic_pointer_cast<AssignmentExpression>(exp);
ExpressionPtr var = assignment->getVariable();
const std::string &name =
dynamic_pointer_cast<SimpleVariable>(var)->getName();
if (variables->isPresent(name)) {
ar->getCodeError()->record(CodeError::DeclaredVariableTwice, exp);
}
IParseHandlerPtr ph = dynamic_pointer_cast<IParseHandler>(exp);
ph->onParse(ar);
} else {
const std::string &name =
dynamic_pointer_cast<SimpleVariable>(exp)->getName();
if (variables->isPresent(name)) {
ar->getCodeError()->record(CodeError::DeclaredVariableTwice, exp);
}
variables->add(name, TypePtr(), false, ar, exp, m_modifiers);
}
}
ar->getScope()->setModifiers(modifiers);
}
void IncludeExpression::analyzeInclude(AnalysisResultPtr ar,
const std::string &include) {
ASSERT(ar->getPhase() == AnalysisResult::AnalyzeInclude);
ConstructPtr self = shared_from_this();
FileScopePtr file = ar->findFileScope(include, true);
if (!file) {
ar->getCodeError()->record(self, CodeError::PHPIncludeFileNotFound, self);
return;
}
if (include.find("compiler/") != 0 ||
include.find("/compiler/") == string::npos) {
ar->getCodeError()->record(self, CodeError::PHPIncludeFileNotInLib,
self, ConstructPtr(),
include.c_str());
}
if (!isFileLevel()) { // Not unsupported but potentially bad
ar->getCodeError()->record(self, CodeError::UseDynamicInclude, self);
}
ar->getDependencyGraph()->add
(DependencyGraph::KindOfProgramMaxInclude,
ar->getName(), file->getName(), StatementPtr());
ar->getDependencyGraph()->addParent
(DependencyGraph::KindOfProgramMinInclude,
ar->getName(), file->getName(), StatementPtr());
FunctionScopePtr func = ar->getFunctionScope();
ar->getFileScope()->addIncludeDependency(ar, m_include,
func && func->isInlined());
}
TypePtr DynamicFunctionCall::inferTypes(AnalysisResultPtr ar, TypePtr type,
bool coerce) {
reset();
ConstructPtr self = shared_from_this();
if (!m_className.empty()) {
ClassScopePtr cls = ar->resolveClass(m_className);
if (!cls || cls->isRedeclaring()) {
if (cls) {
m_redeclared = true;
ar->getScope()->getVariables()->
setAttribute(VariableTable::NeedGlobalPointer);
}
if (!cls && ar->isFirstPass()) {
ar->getCodeError()->record(self, CodeError::UnknownClass, self);
}
} else {
m_validClass = true;
}
}
ar->containsDynamicFunctionCall();
if (ar->isFirstPass()) {
ar->getCodeError()->record(self, CodeError::UseDynamicFunction, self);
}
m_nameExp->inferAndCheck(ar, Type::String, false);
if (m_params) {
for (int i = 0; i < m_params->getCount(); i++) {
(*m_params)[i]->inferAndCheck(ar, Type::Variant, true);
}
}
return Type::Variant;
}
void SwitchStatement::inferTypes(AnalysisResultPtr ar) {
// we optimize the most two common cases of switch statements
bool allInteger = true;
bool allString = true;
if (m_cases && m_cases->getCount()) {
for (int i = 0; i < m_cases->getCount(); i++) {
CaseStatementPtr stmt =
dynamic_pointer_cast<CaseStatement>((*m_cases)[i]);
if (!stmt->getCondition()) {
if (m_cases->getCount() == 1) allInteger = allString = false;
} else {
if (!stmt->isLiteralInteger()) allInteger = false;
if (!stmt->isLiteralString()) allString = false;
}
}
}
if (allInteger && allString) {
allInteger = allString = false;
}
TypePtr ret;
if (allInteger) {
ret = m_exp->inferAndCheck(ar, Type::Int64, false);
} else if (allString) {
// We're not able to do this, because switch($obj) may work on an object
// that didn't implement __toString(), throwing an exception, which isn't
// consistent with PHP.
//ret = m_exp->inferAndCheck(ar, Type::String, false);
ret = m_exp->inferAndCheck(ar, NEW_TYPE(Some), false);
} else {
ret = m_exp->inferAndCheck(ar, NEW_TYPE(Some), false);
}
if (ret->is(Type::KindOfObject) && ret->isSpecificObject()) {
m_exp->setExpectedType(NEW_TYPE(Object));
}
ConstructPtr self = shared_from_this();
if (m_cases && m_cases->getCount()) {
bool checking = false;
vector<int> defaults;
int defaultCount = 0;
for (int i = 0; i < m_cases->getCount(); i++) {
CaseStatementPtr stmt =
dynamic_pointer_cast<CaseStatement>((*m_cases)[i]);
stmt->inferAndCheck(ar, NEW_TYPE(Some), false);
ExpressionPtr cond = stmt->getCondition();
if (!cond) {
checking = true;
defaultCount++;
} else if (checking && cond && ar->isFirstPass()) {
defaults.push_back(i);
ar->getCodeError()->record(self, CodeError::CaseAfterDefault, stmt);
}
}
if (defaultCount > 1 && ar->isFirstPass()) {
ar->getCodeError()->record(self, CodeError::MoreThanOneDefault, m_cases);
}
}
}
void SimpleFunctionCall::onParse(AnalysisResultPtr ar) {
if (m_class) return;
FileScopePtr fs = ar->getFileScope();
ConstructPtr self = shared_from_this();
if (m_className.empty()) {
CodeErrorPtr codeError = ar->getCodeError();
switch (m_type) {
case CreateFunction:
if (m_params->getCount() == 2 &&
(*m_params)[0]->isLiteralString() &&
(*m_params)[1]->isLiteralString()) {
FunctionScopePtr func = ar->getFunctionScope();
if (func) func->disableInline();
string params = (*m_params)[0]->getLiteralString();
string body = (*m_params)[1]->getLiteralString();
m_lambda = CodeGenerator::GetNewLambda();
string code = "function " + m_lambda + "(" + params + ") "
"{" + body + "}";
ar->appendExtraCode(code);
}
break;
case VariableArgumentFunction:
ar->getFileScope()->setAttribute(FileScope::VariableArgument);
break;
case ExtractFunction:
ar->getCodeError()->record(self, CodeError::UseExtract, self);
ar->getFileScope()->setAttribute(FileScope::ContainsLDynamicVariable);
ar->getFileScope()->setAttribute(FileScope::ContainsExtract);
break;
case CompactFunction:
ar->getFileScope()->setAttribute(FileScope::ContainsDynamicVariable);
ar->getFileScope()->setAttribute(FileScope::ContainsCompact);
break;
case ShellExecFunction:
ar->getCodeError()->record(self, CodeError::UseShellExec, self);
break;
case GetDefinedVarsFunction:
ar->getFileScope()->setAttribute(FileScope::ContainsGetDefinedVars);
ar->getFileScope()->setAttribute(FileScope::ContainsCompact);
break;
default:
CHECK_HOOK(onSimpleFunctionCallFuncType);
break;
}
}
string call = getText();
string name = m_name;
if (!m_className.empty()) {
name = m_className + "::" + name;
}
ar->getDependencyGraph()->add(DependencyGraph::KindOfFunctionCall, call,
shared_from_this(), name);
}
TypePtr ConstantTable::check(const std::string &name, TypePtr type,
bool coerce, AnalysisResultPtr ar,
ConstructPtr construct,
const std::vector<std::string> &bases,
BlockScope *&defScope) {
TypePtr actualType;
defScope = NULL;
if (name == "true" || name == "false") {
actualType = Type::Boolean;
} else {
Symbol *sym = getSymbol(name, true);
if (!sym->valueSet()) {
if (ar->getPhase() != AnalysisResult::AnalyzeInclude) {
actualType = checkBases(name, type, coerce, ar, construct,
bases, defScope);
if (defScope) return actualType;
ar->getCodeError()->record(CodeError::UseUndeclaredConstant,
construct);
if (m_blockScope.is(BlockScope::ClassScope)) {
actualType = Type::Variant;
} else {
actualType = Type::String;
}
setType(ar, sym, actualType, true);
}
} else {
if (sym->getCoerced()) {
defScope = &m_blockScope;
actualType = sym->getCoerced();
if (actualType->is(Type::KindOfSome) ||
actualType->is(Type::KindOfAny)) {
setType(ar, sym, type, true);
return type;
}
} else {
actualType = checkBases(name, type, coerce, ar, construct,
bases, defScope);
if (defScope) return actualType;
actualType = Type::Some;
setType(ar, sym, actualType, true);
sym->setDeclaration(construct);
}
}
}
if (Type::IsBadTypeConversion(ar, actualType, type, coerce)) {
ar->getCodeError()->record(construct, type->getKindOf(),
actualType->getKindOf());
}
return actualType;
}
TypePtr ConstantTable::check(const std::string &name, TypePtr type,
bool coerce, AnalysisResultPtr ar,
ConstructPtr construct, bool &present) {
TypePtr actualType;
present = true;
if (name == "true" || name == "false") {
actualType = Type::Boolean;
} else if (!ar->isFirstPass() && m_values.find(name) == m_values.end()) {
ClassScopePtr parent = findParent(ar, name);
if (parent) {
return parent->checkConst(name, type, coerce, ar,
construct, present);
}
ar->getCodeError()->record(CodeError::UseUndeclaredConstant,
construct);
if (m_blockScope.is(BlockScope::ClassScope)) {
actualType = Type::Variant;
} else {
actualType = Type::String;
}
setType(ar, name, actualType, true);
present = false;
} else {
StringToTypePtrMap::const_iterator iter = m_coerced.find(name);
if (iter != m_coerced.end()) {
actualType = iter->second;
if (actualType->is(Type::KindOfSome) ||
actualType->is(Type::KindOfAny)) {
setType(ar, name, type, true);
return type;
}
} else {
ClassScopePtr parent = findParent(ar, name);
if (parent) {
return parent->checkConst(name, type, coerce, ar,
construct, present);
}
present = false;
actualType = NEW_TYPE(Some);
setType(ar, name, actualType, true);
m_declarations[name] = construct;
}
}
if (Type::IsBadTypeConversion(ar, actualType, type, coerce)) {
ar->getCodeError()->record(construct, type->getKindOf(),
actualType->getKindOf());
}
return actualType;
}
void ClassStatement::analyzeProgramImpl(AnalysisResultPtr ar) {
vector<string> bases;
if (!m_parent.empty()) bases.push_back(m_parent);
if (m_base) m_base->getStrings(bases);
for (unsigned int i = 0; i < bases.size(); i++) {
string className = bases[i];
addUserClass(ar, bases[i]);
}
ClassScopePtr classScope = m_classScope.lock();
if (hasHphpNote("Volatile")) {
classScope->setVolatile();
}
checkVolatile(ar);
if (m_stmt) {
ar->pushScope(classScope);
m_stmt->analyzeProgram(ar);
ar->popScope();
}
if (ar->getPhase() != AnalysisResult::AnalyzeAll) return;
DependencyGraphPtr dependencies = ar->getDependencyGraph();
for (unsigned int i = 0; i < bases.size(); i++) {
ClassScopePtr cls = ar->findClass(bases[i]);
if (cls) {
if ((!cls->isInterface() && (m_parent.empty() || i > 0 )) ||
(cls->isInterface() && (!m_parent.empty() && i == 0 ))) {
ar->getCodeError()->record(CodeError::InvalidDerivation,
shared_from_this(), ConstructPtr(),
cls->getOriginalName().c_str());
}
if (dependencies->checkCircle(DependencyGraph::KindOfClassDerivation,
m_originalName,
cls->getOriginalName())) {
ar->getCodeError()->record(CodeError::InvalidDerivation,
shared_from_this(), ConstructPtr(),
cls->getOriginalName().c_str());
m_parent = "";
m_base = ExpressionListPtr();
classScope->clearBases();
} else if (cls->isUserClass()) {
dependencies->add(DependencyGraph::KindOfClassDerivation,
ar->getName(),
m_originalName, shared_from_this(),
cls->getOriginalName(), cls->getStmt());
}
}
}
}
TypePtr ConstantTable::add(const std::string &name, TypePtr type,
ExpressionPtr exp, AnalysisResultPtr ar,
ConstructPtr construct) {
if (name == "true" || name == "false") {
return Type::Boolean;
}
StringToConstructPtrMap::const_iterator iter = m_values.find(name);
if (iter == m_values.end()) {
setType(ar, name, type, true);
m_declarations[name] = construct;
m_values[name] = exp;
return type;
}
if (ar->isFirstPass()) {
if (exp != iter->second) {
ar->getCodeError()->record(CodeError::DeclaredConstantTwice, construct,
m_declarations[name]);
m_dynamic.insert(name);
type = Type::Variant;
}
setType(ar, name, type, true);
}
return type;
}
TypePtr ParameterExpression::getTypeSpec(AnalysisResultPtr ar, bool error) {
TypePtr ret;
if (m_type.empty() || m_defaultValue) {
ret = Type::Some;
} else if (m_type == "array") {
ret = Type::Array;
} else {
ClassScopePtr cls = ar->findClass(m_type);
if (!cls || cls->isRedeclaring()) {
if (error && !cls && ar->isFirstPass()) {
ConstructPtr self = shared_from_this();
ar->getCodeError()->record(self, CodeError::UnknownClass, self);
}
ret = Type::Some;
} else {
ret = Type::CreateObjectType(m_type);
}
}
// we still want the above to run, so to record errors and infer defaults
if (m_ref) {
ret = Type::Variant;
}
return ret;
}
TypePtr ConstantTable::add(const std::string &name, TypePtr type,
ExpressionPtr exp, AnalysisResultPtr ar,
ConstructPtr construct) {
if (name == "true" || name == "false") {
return Type::Boolean;
}
Symbol *sym = getSymbol(name, true);
if (!sym->declarationSet()) {
setType(ar, sym, type, true);
sym->setDeclaration(construct);
sym->setValue(exp);
return type;
}
if (ar->isFirstPass()) {
if (exp != sym->getValue()) {
ar->getCodeError()->record(CodeError::DeclaredConstantTwice, construct,
sym->getDeclaration());
sym->setDynamic();
m_hasDynamic = true;
type = Type::Variant;
}
setType(ar, sym, type, true);
}
return type;
}
void StatementList::analyzeProgramImpl(AnalysisResultPtr ar) {
m_included = true;
for (unsigned int i = 0; i < m_stmts.size(); i++) {
StatementPtr stmt = m_stmts[i];
// effect testing
if (ar->isFirstPass() && !stmt->hasEffect() &&
!stmt->is(Statement::KindOfStatementList)) {
ar->getCodeError()->record(shared_from_this(),
CodeError::StatementHasNoEffect, stmt);
}
// changing AUTOLOAD to includes
if (ar->getPhase() == AnalysisResult::AnalyzeInclude &&
stmt->is(Statement::KindOfExpStatement)) {
ExpStatementPtr expStmt = dynamic_pointer_cast<ExpStatement>(stmt);
if (stmt->isFileLevel()) {
expStmt->analyzeAutoload(ar);
}
expStmt->analyzeShortCircuit(ar);
}
bool scopeStmt = stmt->is(Statement::KindOfFunctionStatement) ||
stmt->is(Statement::KindOfClassStatement) ||
stmt->is(Statement::KindOfInterfaceStatement);
if (ar->getPhase() != AnalysisResult::AnalyzeTopLevel || !scopeStmt) {
/* Recurse when analyzing include/all OR when not a scope */
stmt->analyzeProgram(ar);
}
}
}
void UnaryOpExpression::onParse(AnalysisResultPtr ar) {
if (m_op == T_EVAL) {
ConstructPtr self = shared_from_this();
ar->getCodeError()->record(self, CodeError::UseEvaluation, self);
ar->getFileScope()->setAttribute(FileScope::ContainsLDynamicVariable);
}
}
TypePtr FunctionCall::checkParamsAndReturn(AnalysisResultPtr ar,
TypePtr type, bool coerce,
FunctionScopePtr func) {
ConstructPtr self = shared_from_this();
ar->getDependencyGraph()->add(DependencyGraph::KindOfFunctionCall,
ar->getName(), getText(),
self, func->getFullName(), func->getStmt());
TypePtr frt = func->getReturnType();
if (!frt) {
m_voidReturn = true;
setActualType(TypePtr());
if (!type->is(Type::KindOfAny)) {
if (!m_allowVoidReturn && ar->isSecondPass() && !func->isAbstract()) {
ar->getCodeError()->record(self, CodeError::UseVoidReturn, self);
}
m_voidWrapper = true;
}
} else {
m_voidReturn = false;
m_voidWrapper = false;
type = checkTypesImpl(ar, type, frt, coerce);
}
m_extraArg = func->inferParamTypes(ar, self, m_params, m_valid);
m_variableArgument = func->isVariableArgument();
if (m_valid) {
m_implementedType.reset();
} else {
m_implementedType = Type::Variant;
}
return type;
}
void CatchStatement::inferTypes(AnalysisResultPtr ar) {
ClassScopePtr cls = ar->findClass(m_className);
TypePtr type;
m_valid = cls;
if (!m_valid) {
if (ar->isFirstPass()) {
ConstructPtr self = shared_from_this();
ar->getCodeError()->record(self, CodeError::UnknownClass, self);
}
type = NEW_TYPE(Object);
} else if (cls->isRedeclaring()) {
type = NEW_TYPE(Object);
} else {
type = Type::CreateObjectType(m_className);
}
BlockScopePtr scope = ar->getScope();
VariableTablePtr variables = scope->getVariables();
variables->add(m_variable, type, false, ar, shared_from_this(),
ModifierExpressionPtr(), false);
if (ar->isFirstPass()) {
FunctionScopePtr func = dynamic_pointer_cast<FunctionScope>(scope);
if (func && variables->isParameter(m_variable)) {
variables->addLvalParam(m_variable);
}
}
if (m_stmt) m_stmt->inferTypes(ar);
}
void ForEachStatement::inferTypes(AnalysisResultPtr ar) {
if (ar->isFirstPass() &&
!m_array->is(Expression::KindOfSimpleVariable) &&
!m_array->is(Expression::KindOfArrayElementExpression) &&
!m_array->is(Expression::KindOfObjectPropertyExpression)) {
ConstructPtr self = shared_from_this();
ar->getCodeError()->record(self, CodeError::ComplexForEach, self);
}
m_array->inferAndCheck(ar, Type::Array, true);
if (m_name) {
m_name->inferAndCheck(ar, NEW_TYPE(Primitive), true);
}
m_value->inferAndCheck(ar, Type::Variant, true);
if (m_ref) {
TypePtr actualType = m_array->getActualType();
if (!actualType ||
actualType->is(Type::KindOfVariant) ||
actualType->is(Type::KindOfObject)) {
ar->forceClassVariants();
}
}
if (m_stmt) {
ar->getScope()->incLoopNestedLevel();
m_stmt->inferTypes(ar);
ar->getScope()->decLoopNestedLevel();
}
}
void IncludeExpression::onParse(AnalysisResultPtr ar) {
// See if we can get a string literal
preOptimize(ar);
m_include = ar->getDependencyGraph()->add
(DependencyGraph::KindOfPHPInclude, shared_from_this(), m_exp,
ar->getCodeError(), m_documentRoot);
}
TypePtr AssignmentExpression::
inferTypesImpl(AnalysisResultPtr ar, TypePtr type, bool coerce,
ExpressionPtr variable,
ExpressionPtr value /* = ExpressionPtr() */) {
TypePtr ret = type;
if (value) {
if (coerce) {
ret = value->inferAndCheck(ar, type, coerce);
} else {
ret = value->inferAndCheck(ar, NEW_TYPE(Some), coerce);
}
}
BlockScopePtr scope = ar->getScope();
if (variable->is(Expression::KindOfConstantExpression)) {
// ...as in ClassConstant statement
ConstantExpressionPtr exp =
dynamic_pointer_cast<ConstantExpression>(variable);
bool p;
scope->getConstants()->check(exp->getName(), ret, true, ar, variable, p);
} else if (variable->is(Expression::KindOfDynamicVariable)) {
// simptodo: not too sure about this
ar->getFileScope()->setAttribute(FileScope::ContainsLDynamicVariable);
} else if (variable->is(Expression::KindOfSimpleVariable)) {
SimpleVariablePtr var = dynamic_pointer_cast<SimpleVariable>(variable);
if (var->getName() == "this" && ar->getClassScope()) {
if (ar->isFirstPass()) {
ar->getCodeError()->record(variable, CodeError::ReassignThis,
variable);
}
}
if (ar->getPhase() == AnalysisResult::LastInference && value) {
if (!value->getExpectedType()) {
value->setExpectedType(variable->getActualType());
}
}
}
// if the value may involve object, consider the variable as "referenced"
// so that objects are not destructed prematurely.
bool referenced = true;
if (value && value->isScalar()) referenced = false;
if (ret && ret->isNoObjectInvolved()) referenced = false;
if (referenced && variable->is(Expression::KindOfSimpleVariable)) {
SimpleVariablePtr var =
dynamic_pointer_cast<SimpleVariable>(variable);
const std::string &name = var->getName();
VariableTablePtr variables = ar->getScope()->getVariables();
variables->addReferenced(name);
}
TypePtr vt = variable->inferAndCheck(ar, ret, true);
if (!coerce && type->is(Type::KindOfAny)) {
ret = vt;
}
return ret;
}
TypePtr DynamicVariable::inferTypes(AnalysisResultPtr ar, TypePtr type,
bool coerce) {
ConstructPtr self = shared_from_this();
if (m_context & (LValue | RefValue)) {
if (ar->isFirstPass()) {
ar->getCodeError()->record(self, CodeError::UseLDynamicVariable, self);
}
ar->getScope()->getVariables()->forceVariants(ar);
ar->getScope()->
getVariables()->setAttribute(VariableTable::ContainsLDynamicVariable);
} else {
if (ar->isFirstPass()) {
ar->getCodeError()->record(self, CodeError::UseRDynamicVariable, self);
}
}
m_exp->inferAndCheck(ar, Type::String, false);
return m_implementedType = Type::Variant;
}
void InterfaceStatement::analyzeProgramImpl(AnalysisResultPtr ar) {
ClassScopePtr classScope = m_classScope.lock();
if (hasHphpNote("Volatile")) classScope->setVolatile();
if (m_stmt) {
classScope->setIncludeLevel(ar->getIncludeLevel());
ar->pushScope(classScope);
m_stmt->analyzeProgram(ar);
ar->popScope();
}
ar->recordClassSource(m_name, ar->getFileScope()->getName());
checkVolatile(ar);
if (ar->getPhase() != AnalysisResult::AnalyzeAll) return;
vector<string> bases;
if (m_base) m_base->getStrings(bases);
DependencyGraphPtr dependencies = ar->getDependencyGraph();
for (unsigned int i = 0; i < bases.size(); i++) {
ClassScopePtr cls = ar->findClass(bases[i]);
if (cls) {
if (!cls->isInterface()) {
ar->getCodeError()->record(CodeError::InvalidDerivation,
shared_from_this(), ConstructPtr(),
cls->getOriginalName());
}
if (dependencies->checkCircle(DependencyGraph::KindOfClassDerivation,
m_originalName,
cls->getOriginalName())) {
ClassScopePtr classScope = m_classScope.lock();
ar->getCodeError()->record(CodeError::InvalidDerivation,
shared_from_this(), ConstructPtr(),
cls->getOriginalName());
m_base = ExpressionListPtr();
classScope->clearBases();
} else if (cls->isUserClass()) {
dependencies->add(DependencyGraph::KindOfClassDerivation,
ar->getName(),
m_originalName, shared_from_this(),
cls->getOriginalName(), cls->getStmt());
}
}
}
}
void GlobalStatement::inferTypes(AnalysisResultPtr ar) {
BlockScopePtr scope = ar->getScope();
scope->getVariables()->setAttribute(VariableTable::InsideGlobalStatement);
for (int i = 0; i < m_exp->getCount(); i++) {
ExpressionPtr exp = (*m_exp)[i];
if (exp->is(Expression::KindOfSimpleVariable)) {
SimpleVariablePtr var = dynamic_pointer_cast<SimpleVariable>(exp);
VariableTablePtr variables = scope->getVariables();
const std::string &name = var->getName();
/* If we have already seen this variable in the current scope and
it is not a global variable, record this variable as "redeclared"
which will force Variant type.
*/
variables->checkRedeclared(name, KindOfGlobalStatement);
/* If this is not a top-level global statement, the variable also
needs to be Variant type. This should not be a common use case in
php code.
*/
if (!isTopLevel()) {
variables->addNestedGlobal(name);
}
var->setContext(Expression::Declaration);
var->inferAndCheck(ar, NEW_TYPE(Any), true);
if (variables->needLocalCopy(name)) {
variables->forceVariant(ar, name);
variables->setAttribute(VariableTable::NeedGlobalPointer);
}
ConstructPtr decl =
ar->getVariables()->getDeclaration(var->getName());
if (decl) {
ar->getDependencyGraph()->add(DependencyGraph::KindOfGlobalVariable,
ar->getName(),
var->getName(), var,
var->getName(), decl);
}
} else {
if (ar->isFirstPass()) {
ar->getCodeError()->record(shared_from_this(), CodeError::UseDynamicGlobal, exp);
}
m_dynamicGlobal = true;
}
}
FunctionScopePtr func = ar->getFunctionScope();
scope->getVariables()->clearAttribute(VariableTable::InsideGlobalStatement);
}
void StaticStatement::analyzeProgramImpl(AnalysisResultPtr ar) {
m_exp->analyzeProgram(ar);
BlockScopePtr scope = ar->getScope();
for (int i = 0; i < m_exp->getCount(); i++) {
ExpressionPtr exp = (*m_exp)[i];
ExpressionPtr variable;
ExpressionPtr value;
if (ar->getPhase() == AnalysisResult::AnalyzeInclude) {
// turn static $a; into static $a = null;
if (exp->is(Expression::KindOfSimpleVariable)) {
variable = dynamic_pointer_cast<SimpleVariable>(exp);
exp = AssignmentExpressionPtr
(new AssignmentExpression(exp->getLocation(),
Expression::KindOfAssignmentExpression,
variable,
CONSTANT("null"),
false));
(*m_exp)[i] = exp;
}
}
if (exp->is(Expression::KindOfAssignmentExpression)) {
AssignmentExpressionPtr assignment_exp =
dynamic_pointer_cast<AssignmentExpression>(exp);
variable = assignment_exp->getVariable();
value = assignment_exp->getValue();
} else {
ASSERT(false);
}
SimpleVariablePtr var = dynamic_pointer_cast<SimpleVariable>(variable);
if (ar->getPhase() == AnalysisResult::AnalyzeInclude) {
if (scope->getVariables()->setStaticInitVal(var->getName(), value)) {
ar->getCodeError()->record(CodeError::DeclaredStaticVariableTwice,
exp);
}
} else if (ar->getPhase() == AnalysisResult::AnalyzeAll) {
// update initial value
const string &name = var->getName();
ExpressionPtr initValue =
(dynamic_pointer_cast<Expression>
(scope->getVariables()->getStaticInitVal(name)))->clone();
exp = AssignmentExpressionPtr
(new AssignmentExpression(exp->getLocation(),
Expression::KindOfAssignmentExpression,
variable, initValue, false));
(*m_exp)[i] = exp;
}
}
}
ExpressionPtr IncludeExpression::preOptimize(AnalysisResultPtr ar) {
if (ExpressionPtr rep = UnaryOpExpression::preOptimize(ar)) {
return rep;
}
if (ar->getPhase() >= AnalysisResult::FirstPreOptimize) {
if (m_include.empty()) {
m_include = ar->getDependencyGraph()->add
(DependencyGraph::KindOfPHPInclude, shared_from_this(), m_exp,
ar->getCodeError(), m_documentRoot);
m_depsSet = false;
}
if (!m_depsSet && !m_include.empty()) {
analyzeInclude(ar, m_include);
m_depsSet = true;
}
}
return ExpressionPtr();
}
void ClassStatement::analyzeProgram(AnalysisResultPtr ar) {
vector<string> bases;
if (!m_parent.empty()) bases.push_back(m_parent);
if (m_base) m_base->getStrings(bases);
for (unsigned int i = 0; i < bases.size(); i++) {
string className = bases[i];
addUserClass(ar, bases[i]);
}
ClassScopePtr classScope = m_classScope.lock();
if (hasHphpNote("Volatile")) classScope->setVolatile();
FunctionScopePtr func = ar->getFunctionScope();
// redeclared classes are automatically volatile
if (classScope->isVolatile()) {
func->getVariables()->setAttribute(VariableTable::NeedGlobalPointer);
}
if (m_stmt) {
ar->pushScope(classScope);
m_stmt->analyzeProgram(ar);
ar->popScope();
}
DependencyGraphPtr dependencies = ar->getDependencyGraph();
for (unsigned int i = 0; i < bases.size(); i++) {
ClassScopePtr cls = ar->findClass(bases[i]);
if (cls) {
if (dependencies->checkCircle(DependencyGraph::KindOfClassDerivation,
m_originalName,
cls->getOriginalName())) {
ClassScopePtr classScope = m_classScope.lock();
ar->getCodeError()->record(CodeError::InvalidDerivation,
shared_from_this(), ConstructPtr(),
cls->getOriginalName());
m_parent = "";
m_base = ExpressionListPtr();
classScope->clearBases();
} else if (cls->isUserClass()) {
dependencies->add(DependencyGraph::KindOfClassDerivation,
ar->getName(),
m_originalName, shared_from_this(),
cls->getOriginalName(), cls->getStmt());
}
}
}
}
void UnaryOpExpression::analyzeProgram(AnalysisResultPtr ar) {
if (ar->getPhase() == AnalysisResult::AnalyzeFinal && m_op == '@') {
StatementPtr stmt = ar->getStatementForSilencer();
ASSERT(stmt);
m_silencer = stmt->requireSilencers(1);
}
if (ar->isFirstPass()) {
ConstructPtr self = shared_from_this();
if (m_op == T_INCLUDE || m_op == T_REQUIRE) {
ar->getCodeError()->record(self, CodeError::UseInclude, self);
}
}
if (m_exp) m_exp->analyzeProgram(ar);
if (ar->getPhase() == AnalysisResult::AnalyzeFinal && m_op == '@') {
StatementPtr stmt = ar->getStatementForSilencer();
ASSERT(stmt);
stmt->endRequireSilencers(m_silencer);
}
}
void IncludeExpression::analyzeProgram(AnalysisResultPtr ar) {
if (ar->isFirstPass()) {
ConstructPtr self = shared_from_this();
if (m_op == T_INCLUDE || m_op == T_REQUIRE) {
ar->getCodeError()->record(self, CodeError::UseInclude, self);
}
}
string include = getCurrentInclude(ar);
if (!include.empty()) {
if (ar->getPhase() == AnalysisResult::AnalyzeInclude) {
analyzeInclude(ar, include);
}
}
if (!ar->getScope()->inPseudoMain()) {
VariableTablePtr var = ar->getScope()->getVariables();
var->setAttribute(VariableTable::ContainsLDynamicVariable);
var->forceVariants(ar);
}
UnaryOpExpression::analyzeProgram(ar);
}
TypePtr ClassConstantExpression::inferTypes(AnalysisResultPtr ar,
TypePtr type, bool coerce) {
m_valid = false;
ConstructPtr self = shared_from_this();
ClassScopePtr cls = ar->resolveClass(m_className);
if (!cls || cls->isRedeclaring()) {
if (cls) {
m_redeclared = true;
ar->getScope()->getVariables()->
setAttribute(VariableTable::NeedGlobalPointer);
}
if (!cls && ar->isFirstPass()) {
ar->getCodeError()->record(self, CodeError::UnknownClass, self);
}
return type;
}
if (cls->getConstants()->isDynamic(m_varName)) {
ar->getScope()->getVariables()->
setAttribute(VariableTable::NeedGlobalPointer);
}
if (cls->getConstants()->isExplicitlyDeclared(m_varName)) {
string name = m_className + "::" + m_varName;
ConstructPtr decl = cls->getConstants()->getDeclaration(m_varName);
if (decl) { // No decl means an extension class.
ar->getDependencyGraph()->add(DependencyGraph::KindOfConstant,
ar->getName(),
name, shared_from_this(), name, decl);
}
m_valid = true;
}
bool present;
TypePtr t = cls->checkConst(m_varName, type, coerce, ar,
shared_from_this(), present);
if (present) {
m_valid = true;
}
return t;
}
/**
* ArrayElementExpression comes from:
*
* reference_variable[|expr]
* ->object_dim_list[|expr]
* encaps T_VARIABLE[expr]
* encaps ${T_STRING[expr]}
*/
TypePtr ArrayElementExpression::inferTypes(AnalysisResultPtr ar,
TypePtr type, bool coerce) {
ConstructPtr self = shared_from_this();
// handling $GLOBALS[...]
if (m_variable->is(Expression::KindOfSimpleVariable)) {
SimpleVariablePtr var =
dynamic_pointer_cast<SimpleVariable>(m_variable);
if (var->getName() == "GLOBALS") {
clearEffect(AccessorEffect);
m_global = true;
m_dynamicGlobal = true;
ar->getScope()->getVariables()->
setAttribute(VariableTable::NeedGlobalPointer);
VariableTablePtr vars = ar->getVariables();
if (m_offset && m_offset->is(Expression::KindOfScalarExpression)) {
ScalarExpressionPtr offset =
dynamic_pointer_cast<ScalarExpression>(m_offset);
if (offset->isLiteralString()) {
m_globalName = offset->getIdentifier();
if (!m_globalName.empty()) {
m_dynamicGlobal = false;
ar->getScope()->getVariables()->
setAttribute(VariableTable::NeedGlobalPointer);
TypePtr ret;
ConstructPtr decl = vars->getDeclaration(m_globalName);
if (decl) {
ar->getDependencyGraph()->
add(DependencyGraph::KindOfGlobalVariable,
ar->getName(),
m_globalName, self, m_globalName, decl);
}
if (coerce) {
ret = vars->add(m_globalName, type, true, ar, self,
ModifierExpressionPtr());
} else {
int p;
ret =
vars->checkVariable(m_globalName, type, coerce, ar, self, p);
}
ar->getScope()->getVariables()->addSuperGlobal(m_globalName);
return ret;
}
}
} else {
vars->setAttribute(VariableTable::ContainsDynamicVariable);
}
if (hasContext(LValue) || hasContext(RefValue)) {
if (ar->isFirstPass()) {
ar->getCodeError()->record(self, CodeError::UseLDynamicVariable,
self);
}
ar->getVariables()->forceVariants(ar);
ar->getVariables()->
setAttribute(VariableTable::ContainsLDynamicVariable);
} else {
if (ar->isFirstPass()) {
ar->getCodeError()->record(self, CodeError::UseRDynamicVariable,
self);
}
}
if (m_offset) {
m_offset->inferAndCheck(ar, NEW_TYPE(Primitive), false);
}
return m_implementedType = Type::Variant; // so not to lose values
}
}
if ((hasContext(LValue) || hasContext(RefValue)) &&
!hasContext(UnsetContext)) {
m_variable->setContext(LValue);
}
TypePtr varType;
if (m_offset) {
varType = m_variable->inferAndCheck(ar, NEW_TYPE(Sequence), false);
m_offset->inferAndCheck(ar, NEW_TYPE(Some), false);
} else {
if (hasContext(ExistContext) || hasContext(UnsetContext)) {
if (ar->isFirstPass()) {
ar->getCodeError()->record(self, CodeError::InvalidArrayElement,
self);
}
}
m_variable->inferAndCheck(ar, Type::Array, true);
}
if (varType && Type::SameType(varType, Type::String)) {
clearEffect(AccessorEffect);
m_implementedType.reset();
return Type::String;
}
if (varType && Type::SameType(varType, Type::Array)) {
clearEffect(AccessorEffect);
}
if (hasContext(LValue) || hasContext(RefValue)) setEffect(CreateEffect);
TypePtr ret = propagateTypes(ar, Type::Variant);
m_implementedType = Type::Variant;
return ret; // so not to lose values
}
TypePtr ObjectPropertyExpression::inferTypes(AnalysisResultPtr ar,
TypePtr type, bool coerce) {
m_valid = false;
ConstructPtr self = shared_from_this();
TypePtr objectType = m_object->inferAndCheck(ar, NEW_TYPE(Object), false);
if (!m_property->is(Expression::KindOfScalarExpression)) {
// if dynamic property or method, we have nothing to find out
if (ar->isFirstPass()) {
ar->getCodeError()->record(self, CodeError::UseDynamicProperty, self);
}
m_property->inferAndCheck(ar, Type::String, false);
// we also lost track of which class variable an expression is about, hence
// any type inference could be wrong. Instead, we just force variants on
// all class variables.
if (m_context & (LValue | RefValue)) {
ar->forceClassVariants();
}
return Type::Variant; // we have to use a variant to hold dynamic value
}
ScalarExpressionPtr exp = dynamic_pointer_cast<ScalarExpression>(m_property);
string name = exp->getString();
ASSERT(!name.empty());
m_property->inferAndCheck(ar, Type::String, false);
ClassScopePtr cls;
if (objectType && !objectType->getName().empty()) {
// what object-> has told us
cls = ar->findExactClass(objectType->getName());
} else {
// what ->property has told us
cls = ar->findClass(name, AnalysisResult::PropertyName);
if (cls) {
objectType =
m_object->inferAndCheck(ar, Type::CreateObjectType(cls->getName()),
false);
}
if ((m_context & LValue) &&
objectType && !objectType->is(Type::KindOfObject) &&
!objectType->is(Type::KindOfVariant) &&
!objectType->is(Type::KindOfSome) &&
!objectType->is(Type::KindOfAny)) {
m_object->inferAndCheck(ar, NEW_TYPE(Object), true);
}
}
if (!cls) {
if (m_context & (LValue | RefValue)) {
ar->forceClassVariants(name);
}
return Type::Variant;
}
const char *accessorName = hasContext(DeepAssignmentLHS) ? "__set" :
hasContext(ExistContext) ? "__isset" :
hasContext(UnsetContext) ? "__unset" : "__get";
if (!cls->implementsAccessor(ar, accessorName)) clearEffect(AccessorEffect);
// resolved to this class
int present = 0;
if (m_context & RefValue) {
type = Type::Variant;
coerce = true;
}
// use $this inside a static function
if (m_object->isThis()) {
FunctionScopePtr func = ar->getFunctionScope();
if (func->isStatic()) {
if (ar->isFirstPass()) {
ar->getCodeError()->record(self, CodeError::MissingObjectContext,
self);
}
m_actualType = Type::Variant;
return m_actualType;
}
}
TypePtr ret;
if (!cls->derivesFromRedeclaring()) { // Have to use dynamic.
ret = cls->checkProperty(name, type, coerce, ar, self, present);
// Private only valid if in the defining class
if (present && (getOriginalScope(ar) == cls ||
!(present & VariableTable::VariablePrivate))) {
m_valid = true;
m_static = present & VariableTable::VariableStatic;
if (m_static) {
ar->getScope()->getVariables()->
setAttribute(VariableTable::NeedGlobalPointer);
}
m_class = cls;
}
}
// get() will return Variant
if (!m_valid || !m_object->getType()->isSpecificObject()) {
m_actualType = Type::Variant;
return m_actualType;
}
clearEffect(AccessorEffect);
if (ar->getPhase() == AnalysisResult::LastInference) {
if (!(m_context & ObjectContext)) {
m_object->clearContext(Expression::LValue);
}
setContext(Expression::NoLValueWrapper);
}
return ret;
}