forked from OSchip/llvm-project
62 lines
2.1 KiB
C++
62 lines
2.1 KiB
C++
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//===--- UndefinedMemoryManipulationCheck.cpp - clang-tidy-----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "UndefinedMemoryManipulationCheck.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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namespace {
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AST_MATCHER(CXXRecordDecl, isNotTriviallyCopyable) {
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return !Node.isTriviallyCopyable();
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}
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} // namespace
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void UndefinedMemoryManipulationCheck::registerMatchers(MatchFinder *Finder) {
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const auto NotTriviallyCopyableObject =
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hasType(pointsTo(cxxRecordDecl(isNotTriviallyCopyable())));
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// Check whether destination object is not TriviallyCopyable.
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// Applicable to all three memory manipulation functions.
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Finder->addMatcher(callExpr(callee(functionDecl(hasAnyName(
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"::memset", "::memcpy", "::memmove"))),
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hasArgument(0, NotTriviallyCopyableObject))
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.bind("dest"),
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this);
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// Check whether source object is not TriviallyCopyable.
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// Only applicable to memcpy() and memmove().
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Finder->addMatcher(
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callExpr(callee(functionDecl(hasAnyName("::memcpy", "::memmove"))),
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hasArgument(1, NotTriviallyCopyableObject))
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.bind("src"),
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this);
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}
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void UndefinedMemoryManipulationCheck::check(
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const MatchFinder::MatchResult &Result) {
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if (const auto *Destination = Result.Nodes.getNodeAs<CallExpr>("dest")) {
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diag(Destination->getLocStart(), "undefined behavior, destination "
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"object is not TriviallyCopyable");
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}
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if (const auto *Source = Result.Nodes.getNodeAs<CallExpr>("src")) {
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diag(Source->getLocStart(), "undefined behavior, source object is not "
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"TriviallyCopyable");
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}
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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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