https://github.com/nuudlman updated
https://github.com/llvm/llvm-project/pull/153498
>From 9b7fd4839440ade71e1b9561b158dd37969b7def Mon Sep 17 00:00:00 2001
From: Isaac Nudelman <62861466+nuudl...@users.noreply.github.com>
Date: Wed, 13 Aug 2025 23:02:11 +0200
Subject: [PATCH 1/2] Support non-default address spaces in the cstring checker
---
.../StaticAnalyzer/Checkers/CStringChecker.cpp | 6 +++---
.../Analysis/element-region-address-space.c | 17 ++++++++++++++++-
2 files changed, 19 insertions(+), 4 deletions(-)
diff --git a/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
b/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
index 0e5fc0a074938..b16118e86c0c1 100644
--- a/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
@@ -1129,9 +1129,9 @@ bool CStringChecker::isFirstBufInBound(CheckerContext &C,
ProgramStateRef State,
if (!ER)
return true; // cf top comment.
- // FIXME: Does this crash when a non-standard definition
- // of a library function is encountered?
- assert(ER->getValueType() == C.getASTContext().CharTy &&
+ // Support library functions defined with non-default address spaces
+ assert(ER->getValueType().getCanonicalType().getUnqualifiedType() ==
+ C.getASTContext().CharTy &&
"isFirstBufInBound should only be called with char* ElementRegions");
// Get the size of the array.
diff --git a/clang/test/Analysis/element-region-address-space.c
b/clang/test/Analysis/element-region-address-space.c
index dd7066240fef6..6d657eeedca30 100644
--- a/clang/test/Analysis/element-region-address-space.c
+++ b/clang/test/Analysis/element-region-address-space.c
@@ -1,11 +1,26 @@
// RUN: %clang_analyze_cc1 -triple amdgcn-unknown-unknown \
-// RUN: -analyzer-checker=core -verify %s
+// RUN: -analyzer-checker=core,unix -verify %s
// expected-no-diagnostics
//
// By default, pointers are 64-bits.
+#define ADDRESS_SPACE_64BITS __attribute__((address_space(0)))
#define ADDRESS_SPACE_32BITS __attribute__((address_space(3)))
int test(ADDRESS_SPACE_32BITS int *p, ADDRESS_SPACE_32BITS void *q) {
return p == q; // no-crash
}
+
+// Make sure that the cstring checker handles non-default address spaces
+ADDRESS_SPACE_64BITS void *
+memcpy(ADDRESS_SPACE_64BITS void *,
+ ADDRESS_SPACE_32BITS const void *,
+ long unsigned int);
+
+typedef struct {
+ char m[1];
+} k;
+
+void l(ADDRESS_SPACE_32BITS char *p, ADDRESS_SPACE_64BITS k *n) {
+ memcpy(&n->m[0], p, 4);
+}
\ No newline at end of file
>From 22e3c626504dbbbcacfd452371f5593faf82b60f Mon Sep 17 00:00:00 2001
From: Isaac Nudelman <isaac.nudel...@utexas.edu>
Date: Thu, 14 Aug 2025 19:05:02 -0500
Subject: [PATCH 2/2] Clean up test based on feedback
---
clang/test/Analysis/element-region-address-space.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/clang/test/Analysis/element-region-address-space.c
b/clang/test/Analysis/element-region-address-space.c
index 6d657eeedca30..737bacc2ea5a8 100644
--- a/clang/test/Analysis/element-region-address-space.c
+++ b/clang/test/Analysis/element-region-address-space.c
@@ -1,5 +1,6 @@
// RUN: %clang_analyze_cc1 -triple amdgcn-unknown-unknown \
-// RUN: -analyzer-checker=core,unix -verify %s
+// RUN: -Wno-incompatible-library-redeclaration \
+// RUN: -analyzer-checker=core,unix.cstring.BadSizeArg -verify %s
// expected-no-diagnostics
//
@@ -17,10 +18,10 @@ memcpy(ADDRESS_SPACE_64BITS void *,
ADDRESS_SPACE_32BITS const void *,
long unsigned int);
-typedef struct {
- char m[1];
-} k;
+ADDRESS_SPACE_64BITS struct {
+ char m[16];
+} n;
-void l(ADDRESS_SPACE_32BITS char *p, ADDRESS_SPACE_64BITS k *n) {
- memcpy(&n->m[0], p, 4);
+void avoid_cstring_checker_crash(ADDRESS_SPACE_32BITS char *p) {
+ memcpy(&n.m[0], p, 4); // no-crash
}
\ No newline at end of file
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