Jordan Delong
363d1bb20f
This change is mostly for FB internal organizational reasons. Building is not effected beyond the fact that the target now lands in hphp/hhvm/hhvm rather than src/hhvm/hhvm.
304 linhas
9.9 KiB
C++
304 linhas
9.9 KiB
C++
/*
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+----------------------------------------------------------------------+
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| HipHop for PHP |
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+----------------------------------------------------------------------+
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| Copyright (c) 2010- Facebook, Inc. (http://www.facebook.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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*/
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#include <compiler/expression/class_constant_expression.h>
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#include <compiler/analysis/class_scope.h>
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#include <compiler/analysis/file_scope.h>
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#include <compiler/analysis/constant_table.h>
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#include <compiler/analysis/code_error.h>
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#include <util/hash.h>
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#include <util/util.h>
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#include <compiler/option.h>
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#include <compiler/analysis/variable_table.h>
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#include <compiler/expression/scalar_expression.h>
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#include <compiler/expression/constant_expression.h>
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using namespace HPHP;
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///////////////////////////////////////////////////////////////////////////////
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// constructors/destructors
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ClassConstantExpression::ClassConstantExpression
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(EXPRESSION_CONSTRUCTOR_PARAMETERS,
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ExpressionPtr classExp, const std::string &varName)
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: Expression(
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EXPRESSION_CONSTRUCTOR_PARAMETER_VALUES(ClassConstantExpression)),
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StaticClassName(classExp), m_varName(varName), m_defScope(NULL),
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m_valid(false), m_depsSet(false) {
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}
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ExpressionPtr ClassConstantExpression::clone() {
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ClassConstantExpressionPtr exp(new ClassConstantExpression(*this));
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Expression::deepCopy(exp);
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exp->m_class = Clone(m_class);
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exp->m_depsSet = false;
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return exp;
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}
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///////////////////////////////////////////////////////////////////////////////
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// parser functions
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///////////////////////////////////////////////////////////////////////////////
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// static analysis functions
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bool ClassConstantExpression::containsDynamicConstant(AnalysisResultPtr ar)
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const {
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if (m_class) return true;
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ClassScopePtr cls = ar->findClass(m_className);
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return !cls || cls->isVolatile() ||
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!cls->getConstants()->isRecursivelyDeclared(ar, m_varName);
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}
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void ClassConstantExpression::analyzeProgram(AnalysisResultPtr ar) {
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if (m_class) {
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m_class->analyzeProgram(ar);
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} else if (ar->getPhase() >= AnalysisResult::AnalyzeAll) {
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if (ClassScopePtr cls = resolveClass()) {
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ConstructPtr decl = cls->getConstants()->
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getValueRecur(ar, m_varName, cls);
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cls->addUse(getScope(), BlockScope::UseKindConstRef);
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m_depsSet = true;
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if (ar->getPhase() == AnalysisResult::AnalyzeFinal) {
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if (!isPresent()) {
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getScope()->getVariables()->
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setAttribute(VariableTable::NeedGlobalPointer);
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}
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}
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}
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addUserClass(ar, m_className);
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}
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}
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string ClassConstantExpression::getActualClassName() const {
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if (m_defScope) {
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return static_cast<ClassScope*>(m_defScope)->getId();
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}
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return m_className;
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}
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ConstructPtr ClassConstantExpression::getNthKid(int n) const {
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switch (n) {
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case 0:
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return m_class;
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default:
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assert(false);
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break;
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}
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return ConstructPtr();
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}
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int ClassConstantExpression::getKidCount() const {
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return 1;
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}
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void ClassConstantExpression::setNthKid(int n, ConstructPtr cp) {
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switch (n) {
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case 0:
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m_class = boost::dynamic_pointer_cast<Expression>(cp);
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break;
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default:
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assert(false);
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break;
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}
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}
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ExpressionPtr ClassConstantExpression::preOptimize(AnalysisResultConstPtr ar) {
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if (ar->getPhase() < AnalysisResult::FirstPreOptimize) {
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return ExpressionPtr();
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}
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if (m_class) {
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updateClassName();
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if (m_class) {
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return ExpressionPtr();
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}
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}
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ClassScopePtr cls = resolveClass();
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if (!cls || (cls->isVolatile() && !isPresent())) {
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if (cls && !m_depsSet) {
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cls->addUse(getScope(), BlockScope::UseKindConstRef);
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m_depsSet = true;
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}
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return ExpressionPtr();
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}
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ConstantTablePtr constants = cls->getConstants();
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ClassScopePtr defClass = cls;
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ConstructPtr decl = constants->getValueRecur(ar, m_varName, defClass);
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if (decl) {
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BlockScope::s_constMutex.lock();
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ExpressionPtr value = dynamic_pointer_cast<Expression>(decl);
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BlockScope::s_constMutex.unlock();
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ExpressionPtr rep = Clone(value, getScope());
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bool annotate = Option::FlAnnotate;
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Option::FlAnnotate = false; // avoid nested comments on getText
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rep->setComment(getText());
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Option::FlAnnotate = annotate;
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rep->setLocation(getLocation());
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return replaceValue(rep);
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}
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return ExpressionPtr();
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}
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TypePtr ClassConstantExpression::inferTypes(AnalysisResultPtr ar,
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TypePtr type, bool coerce) {
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m_valid = false;
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ConstructPtr self = shared_from_this();
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if (m_class) {
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m_class->inferAndCheck(ar, Type::Any, false);
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return Type::Variant;
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}
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ClassScopePtr cls = resolveClassWithChecks();
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if (!cls) {
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return Type::Variant;
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}
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ClassScopePtr defClass = cls;
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ConstructPtr decl =
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cls->getConstants()->getDeclarationRecur(ar, m_varName, defClass);
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if (decl) { // No decl means an extension class or derived from redeclaring
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cls = defClass;
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m_valid = true;
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if (cls->isUserClass()) {
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cls->addUse(getScope(), BlockScope::UseKindConstRef);
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}
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}
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BlockScope *defScope;
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// checkConst grabs locks for us
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TypePtr t = cls->checkConst(getScope(), m_varName, type,
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coerce, ar,
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shared_from_this(),
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cls->getBases(), defScope);
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if (defScope) {
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m_valid = true;
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m_defScope = defScope;
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} else if (cls->derivesFromRedeclaring()) {
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m_defScope = cls.get();
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}
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return t;
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}
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unsigned ClassConstantExpression::getCanonHash() const {
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int64 val =
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hash_string(Util::toLower(m_varName).c_str(), m_varName.size()) -
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hash_string(Util::toLower(m_className).c_str(), m_className.size());
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return ~unsigned(val) ^ unsigned(val >> 32);
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}
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bool ClassConstantExpression::canonCompare(ExpressionPtr e) const {
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return Expression::canonCompare(e) &&
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m_varName == static_cast<ClassConstantExpression*>(e.get())->m_varName &&
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m_className == static_cast<ClassConstantExpression*>(e.get())->m_className;
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}
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///////////////////////////////////////////////////////////////////////////////
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// code generation functions
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void ClassConstantExpression::outputPHP(CodeGenerator &cg,
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AnalysisResultPtr ar) {
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StaticClassName::outputPHP(cg, ar);
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cg_printf("::%s", m_varName.c_str());
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}
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bool ClassConstantExpression::isDynamic() const {
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if (!m_valid) return true;
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return m_defScope->getConstants()->isDynamic(m_varName);
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}
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void ClassConstantExpression::outputCPPImpl(CodeGenerator &cg,
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AnalysisResultPtr ar) {
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if (m_class) {
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cg_printf("get_class_constant(");
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if (m_class->is(KindOfScalarExpression)) {
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assert(strcasecmp(dynamic_pointer_cast<ScalarExpression>(m_class)->
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getString().c_str(), "static") == 0);
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cg_printf("FrameInjection::GetStaticClassName(fi.getThreadInfo())");
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} else {
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cg_printf("get_static_class_name(");
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m_class->outputCPP(cg, ar);
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cg_printf(")");
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}
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cg_printf(", \"%s\")", m_varName.c_str());
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return;
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}
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bool outsideClass = !isPresent();
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if (m_valid) {
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string trueClassName;
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assert(m_defScope);
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ClassScope *cls = dynamic_cast<ClassScope*>(m_defScope);
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trueClassName = cls->getName();
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assert(!trueClassName.empty());
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if (outsideClass) {
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cls->outputVolatileCheckBegin(cg, ar, getScope(), m_origClassName);
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}
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if (cls->getConstants()->isDynamic(m_varName)) {
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cg_printf("%s%s->lazy_initializer(%s)->",
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Option::ClassStaticsCallbackPrefix, cls->getId().c_str(),
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cg.getGlobals(ar));
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if (cg.isFileOrClassHeader()) {
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if (getClassScope()) {
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getClassScope()->addUsedClassFullHeader(ClassScopeRawPtr(cls));
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} else {
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getFileScope()->addUsedClassFullHeader(ClassScopeRawPtr(cls));
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}
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}
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} else if (cg.isFileOrClassHeader()) {
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if (getClassScope()) {
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getClassScope()->addUsedClassConstHeader(ClassScopeRawPtr(cls),
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m_varName);
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} else {
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getFileScope()->addUsedClassConstHeader(ClassScopeRawPtr(cls),
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m_varName);
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}
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}
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cg_printf("%s%s%s%s",
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Option::ClassConstantPrefix, cls->getId().c_str(),
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Option::IdPrefix.c_str(), m_varName.c_str());
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if (outsideClass) {
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cls->outputVolatileCheckEnd(cg);
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}
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} else if (isRedeclared()) {
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if (outsideClass) {
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ClassScope::OutputVolatileCheckBegin(cg, ar, getScope(), m_origClassName);
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}
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const string &clsName = CodeGenerator::FormatLabel(m_className);
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cg_printf("%s->%s%s->os_constant(\"%s\")", cg.getGlobals(ar),
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Option::ClassStaticsCallbackPrefix,
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clsName.c_str(), m_varName.c_str());
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if (outsideClass) {
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ClassScope::OutputVolatileCheckEnd(cg);
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}
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} else if (m_defScope) { // !m_valid && m_defScope -> derives from redeclaring
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cg_printf("%s%s->os_constant(\"%s\")",
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Option::ClassStaticsCallbackPrefix, m_defScope->getId().c_str(),
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m_varName.c_str());
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} else {
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cg_printf("throw_fatal(\"unknown class constant %s::%s\")",
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CodeGenerator::EscapeLabel(m_className).c_str(),
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m_varName.c_str());
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}
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}
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