[clang] nonblocking/nonallocating attributes: 2nd pass caller/callee analysis (PR #99656)
Erich Keane via cfe-commits
cfe-commits at lists.llvm.org
Thu Sep 26 06:34:13 PDT 2024
================
@@ -0,0 +1,1571 @@
+//=== SemaFunctionEffects.cpp - Sema handling of function effects ---------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements Sema handling of function effects.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/AST/Decl.h"
+#include "clang/AST/DeclCXX.h"
+#include "clang/AST/RecursiveASTVisitor.h"
+#include "clang/AST/Stmt.h"
+#include "clang/AST/Type.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Sema/SemaInternal.h"
+
+#define DEBUG_TYPE "effectanalysis"
+
+using namespace clang;
+
+namespace {
+
+enum class ViolationID : uint8_t {
+ None = 0, // Sentinel for an empty Violation.
+ // These first few map to a %select{} in a diagnostic.
+ BaseDiagnosticIndex,
+ AllocatesMemory = BaseDiagnosticIndex,
+ ThrowsOrCatchesExceptions,
+ HasStaticLocalVariable,
+ AccessesThreadLocalVariable,
+ AccessesObjCMethodOrProperty,
+
+ // These only apply to callees, where the analysis stops at the Decl.
+ DeclDisallowsInference,
+
+ // These both apply to indirect calls. The difference is that sometimes
+ // we have an actual Decl (generally a variable) which is the function
+ // pointer being called, and sometimes, typically due to a cast, we only
+ // have an expression.
+ CallsDeclWithoutEffect,
+ CallsExprWithoutEffect,
+};
+
+// Information about the AST context in which a violation was found, so
+// that diagnostics can point to the correct source.
+class ViolationSite {
+public:
+ enum class Kind : uint8_t {
+ Default = 0, // Function body.
----------------
erichkeane wrote:
Same question here with the values set, we typically don't set these to the default values unless it matches some sort of 'meaning' (that is, it acts as documentation).
https://github.com/llvm/llvm-project/pull/99656
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