120 lines
3.5 KiB
C++
120 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#pragma once
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#include <clang/AST/RecursiveASTVisitor.h>
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#include <unordered_set>
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#include "plugin.hxx"
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/**
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* Common code for checking if the address of a function was taken.
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*/
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namespace loplugin {
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template<typename Base>
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class FunctionAddress : public Base
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{
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public:
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explicit FunctionAddress( const InstantiationData& data ) : Base(data) {}
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bool TraverseCallExpr(CallExpr * expr) {
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auto const saved = callee_;
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callee_ = expr->getCallee();
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auto const ret = Base::TraverseCallExpr(expr);
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callee_ = saved;
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return ret;
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}
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bool TraverseCXXOperatorCallExpr(CXXOperatorCallExpr * expr) {
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auto const saved = callee_;
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callee_ = expr->getCallee();
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auto const ret = Base::TraverseCXXOperatorCallExpr(expr);
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callee_ = saved;
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return ret;
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}
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bool TraverseCXXMemberCallExpr(CXXMemberCallExpr * expr) {
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auto const saved = callee_;
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callee_ = expr->getCallee();
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auto const ret = Base::TraverseCXXMemberCallExpr(expr);
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callee_ = saved;
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return ret;
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}
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bool TraverseCUDAKernelCallExpr(CUDAKernelCallExpr * expr) {
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auto const saved = callee_;
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callee_ = expr->getCallee();
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auto const ret = Base::TraverseCUDAKernelCallExpr(expr);
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callee_ = saved;
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return ret;
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}
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bool TraverseUserDefinedLiteral(UserDefinedLiteral * expr) {
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auto const saved = callee_;
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callee_ = expr->getCallee();
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auto const ret = Base::TraverseUserDefinedLiteral(expr);
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callee_ = saved;
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return ret;
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}
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bool VisitImplicitCastExpr(ImplicitCastExpr const * expr) {
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if (expr == callee_) {
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return true;
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}
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if (this->ignoreLocation(expr)) {
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return true;
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}
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if (expr->getCastKind() != CK_FunctionToPointerDecay) {
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return true;
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}
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auto const dre = dyn_cast<DeclRefExpr>(
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expr->getSubExpr()->IgnoreParens());
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if (dre == nullptr) {
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return true;
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}
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auto const fd = dyn_cast<FunctionDecl>(dre->getDecl());
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if (fd == nullptr) {
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return true;
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}
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ignoredFunctions_.insert(fd->getCanonicalDecl());
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return true;
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}
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bool VisitUnaryOperator(UnaryOperator * expr) {
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if (expr->getOpcode() != UO_AddrOf) {
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return Base::VisitUnaryOperator(expr);
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}
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if (this->ignoreLocation(expr)) {
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return true;
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}
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auto const dre = dyn_cast<DeclRefExpr>(
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expr->getSubExpr()->IgnoreParenImpCasts());
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if (dre == nullptr) {
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return true;
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}
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auto const fd = dyn_cast<FunctionDecl>(dre->getDecl());
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if (fd == nullptr) {
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return true;
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}
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ignoredFunctions_.insert(fd->getCanonicalDecl());
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return true;
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}
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protected:
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std::unordered_set<FunctionDecl const *> const & getFunctionsWithAddressTaken() { return ignoredFunctions_; }
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private:
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std::unordered_set<FunctionDecl const *> ignoredFunctions_;
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Expr const * callee_ = nullptr;
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};
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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