clang-tools 20.0.0git
openmp/ExceptionEscapeCheck.cpp
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1//===--- ExceptionEscapeCheck.cpp - clang-tidy ----------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
10#include "clang/AST/ASTContext.h"
11#include "clang/AST/OpenMPClause.h"
12#include "clang/AST/Stmt.h"
13#include "clang/AST/StmtOpenMP.h"
14#include "clang/ASTMatchers/ASTMatchFinder.h"
15#include "clang/ASTMatchers/ASTMatchers.h"
16#include "clang/ASTMatchers/ASTMatchersMacros.h"
17
18using namespace clang::ast_matchers;
19
21
23 ClangTidyContext *Context)
24 : ClangTidyCheck(Name, Context),
25 RawIgnoredExceptions(Options.get("IgnoredExceptions", "")) {
26 llvm::SmallVector<StringRef, 8> FunctionsThatShouldNotThrowVec,
27 IgnoredExceptionsVec;
28
29 llvm::StringSet<> IgnoredExceptions;
30 StringRef(RawIgnoredExceptions).split(IgnoredExceptionsVec, ",", -1, false);
31 llvm::transform(IgnoredExceptionsVec, IgnoredExceptionsVec.begin(),
32 [](StringRef S) { return S.trim(); });
33 IgnoredExceptions.insert(IgnoredExceptionsVec.begin(),
34 IgnoredExceptionsVec.end());
35 Tracer.ignoreExceptions(std::move(IgnoredExceptions));
36 Tracer.ignoreBadAlloc(true);
37}
38
40 Options.store(Opts, "IgnoredExceptions", RawIgnoredExceptions);
41}
42
43void ExceptionEscapeCheck::registerMatchers(MatchFinder *Finder) {
44 Finder->addMatcher(ompExecutableDirective(
45 unless(isStandaloneDirective()),
46 hasStructuredBlock(stmt().bind("structured-block")))
47 .bind("directive"),
48 this);
49}
50
51void ExceptionEscapeCheck::check(const MatchFinder::MatchResult &Result) {
52 const auto *Directive =
53 Result.Nodes.getNodeAs<OMPExecutableDirective>("directive");
54 assert(Directive && "Expected to match some OpenMP Executable directive.");
55 const auto *StructuredBlock =
56 Result.Nodes.getNodeAs<Stmt>("structured-block");
57 assert(StructuredBlock && "Expected to get some OpenMP Structured Block.");
58
59 if (Tracer.analyze(StructuredBlock).getBehaviour() !=
61 return; // No exceptions have been proven to escape out of the struc. block.
62
63 // FIXME: We should provide more information about the exact location where
64 // the exception is thrown, maybe the full path the exception escapes.
65
66 diag(StructuredBlock->getBeginLoc(),
67 "an exception thrown inside of the OpenMP '%0' region is not caught in "
68 "that same region")
69 << getOpenMPDirectiveName(Directive->getDirectiveKind());
70}
71
72} // namespace clang::tidy::openmp
llvm::SmallString< 256U > Name
const MacroDirective * Directive
void store(ClangTidyOptions::OptionMap &Options, StringRef LocalName, StringRef Value) const
Stores an option with the check-local name LocalName with string value Value to Options.
Base class for all clang-tidy checks.
DiagnosticBuilder diag(SourceLocation Loc, StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning)
Add a diagnostic with the check's name.
Every ClangTidyCheck reports errors through a DiagnosticsEngine provided by this context.
void storeOptions(ClangTidyOptions::OptionMap &Opts) override
Should store all options supported by this check with their current values or default values for opti...
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.
ExceptionEscapeCheck(StringRef Name, ClangTidyContext *Context)
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.
void ignoreExceptions(llvm::StringSet<> ExceptionNames)
@ Throwing
The function can definitely throw given an AST.
ExceptionInfo analyze(const FunctionDecl *Func)
llvm::StringMap< ClangTidyValue > OptionMap