UncountedLocalVarsChecker and UncheckedLocalVarsChecker should recognize signletons. #119339
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…ize signletons. It's safe to have a raw pointer or a raw reference to a singleton object. Explicitly allow this in UncountedLocalVarsChecker and UncheckedLocalVarsChecker.
llvmbot
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clang
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@llvm/pr-subscribers-clang-static-analyzer-1 @llvm/pr-subscribers-clang Author: Ryosuke Niwa (rniwa) ChangesIt's safe to have a raw pointer or a raw reference to a singleton object. Explicitly allow this in UncountedLocalVarsChecker and UncheckedLocalVarsChecker. Full diff: https://github.com/llvm/llvm-project/pull/119339.diff 2 Files Affected:
diff --git a/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefLocalVarsChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefLocalVarsChecker.cpp
index e0433c5c2c1a09..bb580b06e2c53f 100644
--- a/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefLocalVarsChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefLocalVarsChecker.cpp
@@ -263,7 +263,7 @@ class RawPtrRefLocalVarsChecker
if (tryToFindPtrOrigin(
Value, /*StopAtFirstRefCountedObj=*/false,
[&](const clang::Expr *InitArgOrigin, bool IsSafe) {
- if (!InitArgOrigin)
+ if (!InitArgOrigin || IsSafe)
return true;
if (isa<CXXThisExpr>(InitArgOrigin))
diff --git a/clang/test/Analysis/Checkers/WebKit/uncounted-local-vars.cpp b/clang/test/Analysis/Checkers/WebKit/uncounted-local-vars.cpp
index d7fb689557a6fc..52854cd10f68c7 100644
--- a/clang/test/Analysis/Checkers/WebKit/uncounted-local-vars.cpp
+++ b/clang/test/Analysis/Checkers/WebKit/uncounted-local-vars.cpp
@@ -456,3 +456,12 @@ int TreeNode::recursiveWeight() {
}
} // namespace local_var_in_recursive_function
+
+namespace local_var_for_singleton {
+ RefCountable *singleton();
+ RefCountable *otherSingleton();
+ void foo() {
+ RefCountable* bar = singleton();
+ RefCountable* baz = otherSingleton();
+ }
+}
\ No newline at end of file
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t-rasmud
approved these changes
Dec 10, 2024
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LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/30/builds/12017 Here is the relevant piece of the build log for the reference |
rniwa
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Feb 3, 2025
…ize signletons. (llvm#119339) It's safe to have a raw pointer or a raw reference to a singleton object. Explicitly allow this in UncountedLocalVarsChecker and UncheckedLocalVarsChecker.
devincoughlin
pushed a commit
to swiftlang/llvm-project
that referenced
this pull request
Feb 25, 2025
…ize signletons. (llvm#119339) It's safe to have a raw pointer or a raw reference to a singleton object. Explicitly allow this in UncountedLocalVarsChecker and UncheckedLocalVarsChecker.
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It's safe to have a raw pointer or a raw reference to a singleton object. Explicitly allow this in UncountedLocalVarsChecker and UncheckedLocalVarsChecker.