https://github.com/rniwa created
https://github.com/llvm/llvm-project/pull/135688
This PR makes the checker ignore a function call to lambda via a local variable.
>From 41992e5ffb43f7db7704b93c7ad5fe2135e86e26 Mon Sep 17 00:00:00 2001
From: Ryosuke Niwa <rn...@webkit.org>
Date: Mon, 14 Apr 2025 15:12:10 -0700
Subject: [PATCH] [webkit.UncountedLambdaCapturesChecker] Treat a call to
lambda function via a variable as safe.
This PR makes the checker ignore a function call to lambda via a local variable.
---
.../Checkers/WebKit/RawPtrRefLambdaCapturesChecker.cpp | 2 --
.../Checkers/WebKit/uncounted-lambda-captures.cpp | 8 ++++++++
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git
a/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefLambdaCapturesChecker.cpp
b/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefLambdaCapturesChecker.cpp
index da403d591a2e2..0a658b59ad8c5 100644
---
a/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefLambdaCapturesChecker.cpp
+++
b/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefLambdaCapturesChecker.cpp
@@ -263,8 +263,6 @@ class RawPtrRefLambdaCapturesChecker
return;
DeclRefExprsToIgnore.insert(ArgRef);
LambdasToIgnore.insert(L);
- Checker->visitLambdaExpr(L, shouldCheckThis() && !hasProtectedThis(L),
- ClsType, /* ignoreParamVarDecl */ true);
}
bool hasProtectedThis(LambdaExpr *L) {
diff --git a/clang/test/Analysis/Checkers/WebKit/uncounted-lambda-captures.cpp
b/clang/test/Analysis/Checkers/WebKit/uncounted-lambda-captures.cpp
index 36135973e78c0..cc3d27bbc1375 100644
--- a/clang/test/Analysis/Checkers/WebKit/uncounted-lambda-captures.cpp
+++ b/clang/test/Analysis/Checkers/WebKit/uncounted-lambda-captures.cpp
@@ -372,6 +372,14 @@ void trivial_lambda() {
trivial_lambda();
}
+bool call_lambda_var_decl() {
+ RefCountable* ref_countable = make_obj();
+ auto lambda = [&]() -> bool {
+ return ref_countable->next();
+ };
+ return lambda();
+}
+
void lambda_with_args(RefCountable* obj) {
auto trivial_lambda = [&](int v) {
obj->method();
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