mirror of
https://github.com/capstone-engine/llvm-capstone.git
synced 2024-12-26 01:39:11 +00:00
2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
71 lines
2.6 KiB
C++
71 lines
2.6 KiB
C++
//===--- UndefinedMemoryManipulationCheck.cpp - clang-tidy-----------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "UndefinedMemoryManipulationCheck.h"
|
|
#include "clang/AST/ASTContext.h"
|
|
#include "clang/ASTMatchers/ASTMatchFinder.h"
|
|
|
|
using namespace clang::ast_matchers;
|
|
|
|
namespace clang {
|
|
namespace tidy {
|
|
namespace bugprone {
|
|
|
|
namespace {
|
|
AST_MATCHER(CXXRecordDecl, isNotTriviallyCopyable) {
|
|
// For incomplete types, assume they are TriviallyCopyable.
|
|
return Node.hasDefinition() ? !Node.isTriviallyCopyable() : false;
|
|
}
|
|
} // namespace
|
|
|
|
void UndefinedMemoryManipulationCheck::registerMatchers(MatchFinder *Finder) {
|
|
const auto NotTriviallyCopyableObject =
|
|
hasType(ast_matchers::hasCanonicalType(
|
|
pointsTo(cxxRecordDecl(isNotTriviallyCopyable()))));
|
|
|
|
// Check whether destination object is not TriviallyCopyable.
|
|
// Applicable to all three memory manipulation functions.
|
|
Finder->addMatcher(callExpr(callee(functionDecl(hasAnyName(
|
|
"::memset", "::memcpy", "::memmove"))),
|
|
hasArgument(0, NotTriviallyCopyableObject))
|
|
.bind("dest"),
|
|
this);
|
|
|
|
// Check whether source object is not TriviallyCopyable.
|
|
// Only applicable to memcpy() and memmove().
|
|
Finder->addMatcher(
|
|
callExpr(callee(functionDecl(hasAnyName("::memcpy", "::memmove"))),
|
|
hasArgument(1, NotTriviallyCopyableObject))
|
|
.bind("src"),
|
|
this);
|
|
}
|
|
|
|
void UndefinedMemoryManipulationCheck::check(
|
|
const MatchFinder::MatchResult &Result) {
|
|
if (const auto *Call = Result.Nodes.getNodeAs<CallExpr>("dest")) {
|
|
QualType DestType = Call->getArg(0)->IgnoreImplicit()->getType();
|
|
if (!DestType->getPointeeType().isNull())
|
|
DestType = DestType->getPointeeType();
|
|
diag(Call->getBeginLoc(), "undefined behavior, destination object type %0 "
|
|
"is not TriviallyCopyable")
|
|
<< DestType;
|
|
}
|
|
if (const auto *Call = Result.Nodes.getNodeAs<CallExpr>("src")) {
|
|
QualType SourceType = Call->getArg(1)->IgnoreImplicit()->getType();
|
|
if (!SourceType->getPointeeType().isNull())
|
|
SourceType = SourceType->getPointeeType();
|
|
diag(Call->getBeginLoc(),
|
|
"undefined behavior, source object type %0 is not TriviallyCopyable")
|
|
<< SourceType;
|
|
}
|
|
}
|
|
|
|
} // namespace bugprone
|
|
} // namespace tidy
|
|
} // namespace clang
|