| 1 | //===--- StaticObjectExceptionCheck.cpp - clang-tidy-----------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "StaticObjectExceptionCheck.h" |
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| 10 | #include "clang/AST/ASTContext.h" |
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| 11 | #include "clang/ASTMatchers/ASTMatchFinder.h" |
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| 12 | |
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| 13 | using namespace clang::ast_matchers; |
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| 14 | |
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| 15 | namespace clang::tidy::cert { |
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| 16 | |
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| 17 | void StaticObjectExceptionCheck::registerMatchers(MatchFinder *Finder) { |
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| 18 | // Match any static or thread_local variable declaration that has an |
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| 19 | // initializer that can throw. |
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| 20 | Finder->addMatcher( |
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| 21 | NodeMatch: traverse( |
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| 22 | TK: TK_AsIs, |
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| 23 | InnerMatcher: varDecl( |
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| 24 | anyOf(hasThreadStorageDuration(), hasStaticStorageDuration()), |
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| 25 | unless(anyOf(isConstexpr(), hasType(InnerMatcher: cxxRecordDecl(isLambda())), |
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| 26 | hasAncestor(functionDecl()))), |
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| 27 | anyOf(hasDescendant(cxxConstructExpr(hasDeclaration( |
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| 28 | InnerMatcher: cxxConstructorDecl(unless(isNoThrow())).bind(ID: "func" )))), |
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| 29 | hasDescendant(cxxNewExpr(hasDeclaration( |
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| 30 | InnerMatcher: functionDecl(unless(isNoThrow())).bind(ID: "func" )))), |
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| 31 | hasDescendant(callExpr(hasDeclaration( |
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| 32 | InnerMatcher: functionDecl(unless(isNoThrow())).bind(ID: "func" )))))) |
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| 33 | .bind(ID: "var" )), |
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| 34 | Action: this); |
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| 35 | } |
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| 36 | |
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| 37 | void StaticObjectExceptionCheck::check(const MatchFinder::MatchResult &Result) { |
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| 38 | const auto *VD = Result.Nodes.getNodeAs<VarDecl>(ID: "var" ); |
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| 39 | const auto *Func = Result.Nodes.getNodeAs<FunctionDecl>(ID: "func" ); |
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| 40 | |
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| 41 | diag(VD->getLocation(), |
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| 42 | "initialization of %0 with %select{static|thread_local}1 storage " |
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| 43 | "duration may throw an exception that cannot be caught" ) |
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| 44 | << VD << (VD->getStorageDuration() == SD_Static ? 0 : 1); |
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| 45 | |
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| 46 | SourceLocation FuncLocation = Func->getLocation(); |
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| 47 | if (FuncLocation.isValid()) { |
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| 48 | diag(Loc: FuncLocation, |
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| 49 | Description: "possibly throwing %select{constructor|function}0 declared here" , |
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| 50 | Level: DiagnosticIDs::Note) |
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| 51 | << (isa<CXXConstructorDecl>(Val: Func) ? 0 : 1); |
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| 52 | } |
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| 53 | } |
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| 54 | |
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| 55 | } // namespace clang::tidy::cert |
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| 56 | |
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