forked from OSchip/llvm-project
68 lines
2.4 KiB
C++
68 lines
2.4 KiB
C++
//===--- DynamicStaticInitializersCheck.cpp - clang-tidy ------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "DynamicStaticInitializersCheck.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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using namespace clang::ast_matchers;
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namespace clang {
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namespace tidy {
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namespace bugprone {
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AST_MATCHER(clang::VarDecl, hasConstantDeclaration) {
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const Expr *Init = Node.getInit();
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if (Init && !Init->isValueDependent()) {
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if (Node.isConstexpr())
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return true;
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return Node.evaluateValue();
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}
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return false;
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}
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DynamicStaticInitializersCheck::DynamicStaticInitializersCheck(StringRef Name,
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ClangTidyContext *Context)
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: ClangTidyCheck(Name, Context),
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RawStringHeaderFileExtensions(Options.getLocalOrGlobal(
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"HeaderFileExtensions", utils::defaultHeaderFileExtensions())) {
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if (!utils::parseFileExtensions(RawStringHeaderFileExtensions,
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HeaderFileExtensions,
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utils::defaultFileExtensionDelimiters())) {
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this->configurationDiag("Invalid header file extension: '%0'")
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<< RawStringHeaderFileExtensions;
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}
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}
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void DynamicStaticInitializersCheck::storeOptions(
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ClangTidyOptions::OptionMap &Opts) {
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Options.store(Opts, "HeaderFileExtensions", RawStringHeaderFileExtensions);
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}
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void DynamicStaticInitializersCheck::registerMatchers(MatchFinder *Finder) {
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Finder->addMatcher(
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varDecl(hasGlobalStorage(), unless(hasConstantDeclaration())).bind("var"),
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this);
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}
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void DynamicStaticInitializersCheck::check(const MatchFinder::MatchResult &Result) {
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const auto *Var = Result.Nodes.getNodeAs<VarDecl>("var");
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SourceLocation Loc = Var->getLocation();
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if (!Loc.isValid() || !utils::isPresumedLocInHeaderFile(Loc, *Result.SourceManager,
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HeaderFileExtensions))
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return;
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// If the initializer is a constant expression, then the compiler
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// doesn't have to dynamically initialize it.
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diag(Loc, "static variable %0 may be dynamically initialized in this header file")
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<< Var;
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}
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} // namespace bugprone
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} // namespace tidy
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} // namespace clang
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