https://github.com/gamesh411 updated
https://github.com/llvm/llvm-project/pull/90030
From af05be993f4789705cde374dbf7efefd9a18f1c4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Endre=20F=C3=BCl=C3=B6p?= <endre.fu...@sigmatechnology.com>
Date: Tue, 9 Apr 2024 10:44:43 +0200
Subject: [PATCH] [clang][analyzer] Fix alpha.unix.BlockInCriticalSection
When analyzing C code with function pointers the checker crashes because
of how the implementation extracts IdentifierInfo. Without the fix, this
test crashes.
Add crashing test
---
.../Checkers/BlockInCriticalSectionChecker.cpp | 8 +++++---
clang/test/Analysis/block-in-critical-section.c | 6 ++++++
2 files changed, 11 insertions(+), 3 deletions(-)
create mode 100644 clang/test/Analysis/block-in-critical-section.c
diff --git
a/clang/lib/StaticAnalyzer/Checkers/BlockInCriticalSectionChecker.cpp
b/clang/lib/StaticAnalyzer/Checkers/BlockInCriticalSectionChecker.cpp
index e138debd1361c..d381a30f7e24c 100644
--- a/clang/lib/StaticAnalyzer/Checkers/BlockInCriticalSectionChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/BlockInCriticalSectionChecker.cpp
@@ -14,6 +14,7 @@
//
//===----------------------------------------------------------------------===//
+#include "clang/Analysis/AnalysisDeclContext.h"
#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
#include "clang/StaticAnalyzer/Core/Checker.h"
@@ -103,9 +104,10 @@ class RAIIMutexDescriptor {
// this function is called instead of early returning it. To avoid this,
a
// bool variable (IdentifierInfoInitialized) is used and the function
will
// be run only once.
- Guard = &Call.getCalleeAnalysisDeclContext()->getASTContext().Idents.get(
- GuardName);
- IdentifierInfoInitialized = true;
+ if (AnalysisDeclContext *CalleCtx = Call.getCalleeAnalysisDeclContext())
{
+ Guard = &CalleCtx->getASTContext().Idents.get(GuardName);
+ IdentifierInfoInitialized = true;
+ }
}
}
diff --git a/clang/test/Analysis/block-in-critical-section.c
b/clang/test/Analysis/block-in-critical-section.c
new file mode 100644
index 0000000000000..1e174af541b18
--- /dev/null
+++ b/clang/test/Analysis/block-in-critical-section.c
@@ -0,0 +1,6 @@
+// RUN: %clang_analyze_cc1
-analyzer-checker=core,alpha.unix.BlockInCriticalSection -verify %s
+// expected-no-diagnostics
+
+// This should not crash
+int (*a)(void);
+void b(void) { a(); }
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