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);
}
Example #2
0
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);
}
Example #7
0
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;
}
Example #8
0
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());
      }
    }
  }
}
Example #10
0
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;
}
Example #12
0
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;
}
Example #13
0
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);
    }
  }
}
Example #14
0
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);
    }
}
Example #15
0
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;
}
Example #16
0
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();
  }
}
Example #18
0
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;
}
Example #20
0
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());
      }
    }
  }
}
Example #22
0
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();
}
Example #25
0
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());
      }
    }
  }
}
Example #26
0
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);
    }
}
Example #27
0
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;
}