Export clang-format16 via ydblib project

6e6be3a95868fde888d801b7590af4044049563f

1 files changed, 66 insertions, 0 deletions

diff --git a/contrib/libs/clang16/tools/extra/clang-tidy/bugprone/UndefinedMemoryManipulationCheck.cpp b/contrib/libs/clang16/tools/extra/clang-tidy/bugprone/UndefinedMemoryManipulationCheck.cpp
new file mode 100644
index 0000000000..c2631ce9b4
--- /dev/null
+++ b/contrib/libs/clang16/tools/extra/clang-tidy/bugprone/UndefinedMemoryManipulationCheck.cpp
@@ -0,0 +1,66 @@
+//===--- 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::tidy::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 clang::tidy::bugprone