https://github.com/rniwa created
https://github.com/llvm/llvm-project/pull/127309
Add a missing nullptr check to declProtectsThis.
>From 715da2e5ec5cd64416a5dab9017a9c43a6ca8e78 Mon Sep 17 00:00:00 2001
From: Ryosuke Niwa <rn...@webkit.org>
Date: Sat, 15 Feb 2025 01:33:47 -0800
Subject: [PATCH] [webkit.UncountedLambdaCapturesChecker] Fix a crash in
declProtectsThis
Add a missing nullptr check to declProtectsThis.
---
.../WebKit/UncountedLambdaCapturesChecker.cpp | 2 +
...mbda-captures-decl-protects-this-crash.cpp | 38 +++++++++++++++++++
2 files changed, 40 insertions(+)
create mode 100644
clang/test/Analysis/Checkers/WebKit/uncounted-lambda-captures-decl-protects-this-crash.cpp
diff --git
a/clang/lib/StaticAnalyzer/Checkers/WebKit/UncountedLambdaCapturesChecker.cpp
b/clang/lib/StaticAnalyzer/Checkers/WebKit/UncountedLambdaCapturesChecker.cpp
index 4ffdac5ca4873..aee43bdd983a0 100644
---
a/clang/lib/StaticAnalyzer/Checkers/WebKit/UncountedLambdaCapturesChecker.cpp
+++
b/clang/lib/StaticAnalyzer/Checkers/WebKit/UncountedLambdaCapturesChecker.cpp
@@ -267,6 +267,8 @@ class UncountedLambdaCapturesChecker
auto OpCode = OpCE->getOperator();
if (OpCode == OO_Star || OpCode == OO_Amp) {
auto *Callee = OpCE->getDirectCallee();
+ if (!Callee)
+ return false;
auto clsName = safeGetName(Callee->getParent());
if (!isRefType(clsName) || !OpCE->getNumArgs())
return false;
diff --git
a/clang/test/Analysis/Checkers/WebKit/uncounted-lambda-captures-decl-protects-this-crash.cpp
b/clang/test/Analysis/Checkers/WebKit/uncounted-lambda-captures-decl-protects-this-crash.cpp
new file mode 100644
index 0000000000000..0d25c599ffb3e
--- /dev/null
+++
b/clang/test/Analysis/Checkers/WebKit/uncounted-lambda-captures-decl-protects-this-crash.cpp
@@ -0,0 +1,38 @@
+// RUN: %clang_analyze_cc1
-analyzer-checker=webkit.UncountedLambdaCapturesChecker -verify %s
+
+struct Foo {
+ int x;
+ int y;
+ Foo(int x, int y) : x(x) , y(y) { }
+};
+
+template <typename T>
+struct Baz {
+ void ref() const;
+ void deref() const;
+ Foo operator*();
+};
+
+inline Foo operator*(const Foo& a, const Foo& b);
+
+Baz<Foo> someFunction();
+template <typename CallbackType> void bar(CallbackType callback) {
+ auto baz = someFunction();
+ callback(baz);
+}
+
+struct Obj {
+ void ref() const;
+ void deref() const;
+
+ void foo(Foo foo) {
+ bar([this](auto baz) {
+ // expected-warning@-1{{Captured raw-pointer 'this' to ref-counted type
or CheckedPtr-capable type is unsafe [webkit.UncountedLambdaCapturesChecker]}}
+ bar([this, foo = *baz](auto&&) {
+ // expected-warning@-1{{Captured raw-pointer 'this' to ref-counted
type or CheckedPtr-capable type is unsafe
[webkit.UncountedLambdaCapturesChecker]}}
+ someFunction();
+ });
+ });
+ }
+};
+
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