[clang] [clang][ssaf] Add cpp-bounded-buffers source transformation (PR #210457)

[Balázs Benics via cfe-commits]

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@@ -0,0 +1,482 @@
+//===- CppBoundedBuffers.cpp ----------------------------------------------===//
+//
+// 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 "clang/ScalableStaticAnalysis/SourceTransformation/Transformations/CppBoundedBuffers.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/DeclBase.h"
+#include "clang/AST/DeclCXX.h"
+#include "clang/AST/DynamicRecursiveASTVisitor.h"
+#include "clang/AST/Type.h"
+#include "clang/AST/TypeLoc.h"
+#include "clang/Basic/SourceLocation.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Lex/Lexer.h"
+#include "clang/ScalableStaticAnalysis/Analyses/EntityPointerLevel/EntityPointerLevel.h"
+#include "clang/ScalableStaticAnalysis/Analyses/UnsafeBufferUsage/UnsafeBufferUsageAnalysis.h"
+#include "clang/ScalableStaticAnalysis/Core/ASTEntityMapping.h"
+#include "clang/ScalableStaticAnalysis/Core/Model/EntityId.h"
+#include "clang/ScalableStaticAnalysis/Core/Model/EntityIdTable.h"
+#include "clang/ScalableStaticAnalysis/Core/Model/EntityName.h"
+#include "clang/ScalableStaticAnalysis/SourceTransformation/TransformationRegistry.h"
+#include "clang/Tooling/Core/Replacement.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallVector.h"
+#include <cassert>
+#include <map>
+#include <string>
+
+using namespace clang;
+using namespace clang::ssaf;
+
+static constexpr llvm::StringLiteral SkippedRuleId =
+    "cpp-bounded-buffers-skipped";
+
+namespace {
+
+/// A declarator whose type can carry pointer levels.
+bool isCandidateType(QualType T) {
+  QualType U = T.getNonReferenceType();
+  return U->isPointerType() || U->isArrayType();
+}
+
+std::string spell(QualType T, const ASTContext &Ctx) {
+  return T.getAsString(Ctx.getPrintingPolicy());
+}
+
+/// Whether \p T can be re-emitted as written. Anonymous records and lambdas
+/// have no usable spelling.
+bool isReproducible(QualType T) {
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steakhal wrote:

I don't like this name. It's way too ambiguous. How about something more direct: `isAnonymousRecordOrLambda` or something similar?

https://github.com/llvm/llvm-project/pull/210457