73 lines
2.7 KiB
C++
73 lines
2.7 KiB
C++
//===--- NoSuspendWithLockCheck.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 "NoSuspendWithLockCheck.h"
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#include "../utils/ExprSequence.h"
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#include "../utils/Matchers.h"
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#include "../utils/OptionsUtils.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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#include "clang/Analysis/CFG.h"
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using namespace clang::ast_matchers;
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namespace clang::tidy::cppcoreguidelines {
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void NoSuspendWithLockCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
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Options.store(Opts, "LockGuards", LockGuards);
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}
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void NoSuspendWithLockCheck::registerMatchers(MatchFinder *Finder) {
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auto LockType = elaboratedType(namesType(templateSpecializationType(
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hasDeclaration(namedDecl(matchers::matchesAnyListedName(
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utils::options::parseStringList(LockGuards)))))));
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StatementMatcher Lock =
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declStmt(has(varDecl(hasType(LockType)).bind("lock-decl")))
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.bind("lock-decl-stmt");
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Finder->addMatcher(
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expr(anyOf(coawaitExpr(), coyieldExpr(), dependentCoawaitExpr()),
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forCallable(functionDecl().bind("function")),
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unless(isInTemplateInstantiation()),
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hasAncestor(
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compoundStmt(has(Lock), forCallable(equalsBoundNode("function")))
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.bind("block")))
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.bind("suspend"),
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this);
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}
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void NoSuspendWithLockCheck::check(const MatchFinder::MatchResult &Result) {
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const auto *Block = Result.Nodes.getNodeAs<CompoundStmt>("block");
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const auto *Suspend = Result.Nodes.getNodeAs<Expr>("suspend");
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const auto *LockDecl = Result.Nodes.getNodeAs<VarDecl>("lock-decl");
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const auto *LockStmt = Result.Nodes.getNodeAs<Stmt>("lock-decl-stmt");
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if (!Block || !Suspend || !LockDecl || !LockStmt)
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return;
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ASTContext &Context = *Result.Context;
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CFG::BuildOptions Options;
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Options.AddImplicitDtors = true;
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Options.AddTemporaryDtors = true;
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std::unique_ptr<CFG> TheCFG = CFG::buildCFG(
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nullptr, const_cast<clang::CompoundStmt *>(Block), &Context, Options);
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if (!TheCFG)
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return;
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utils::ExprSequence Sequence(TheCFG.get(), Block, &Context);
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const Stmt *LastBlockStmt = Block->body_back();
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if (Sequence.inSequence(LockStmt, Suspend) &&
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(Suspend == LastBlockStmt ||
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Sequence.inSequence(Suspend, LastBlockStmt))) {
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diag(Suspend->getBeginLoc(), "coroutine suspended with lock %0 held")
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<< LockDecl;
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}
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}
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} // namespace clang::tidy::cppcoreguidelines
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