From: Stephen Hemminger <stephen@networkplumber.org>
To: dev@dpdk.org
Cc: Stephen Hemminger <stephen@networkplumber.org>
Subject: [RFC] eal: add rte_counted_by attribute
Date: Tue, 12 Mar 2024 14:01:08 -0700 [thread overview]
Message-ID: <20240312210308.8788-1-stephen@networkplumber.org> (raw)
Both Gcc 14 and clang support this in latest versions.
Add to EAL first, then instrument flexible arrays.
[1] https://reviews.llvm.org/D148381
[2] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108896
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
lib/eal/include/rte_compat.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/lib/eal/include/rte_compat.h b/lib/eal/include/rte_compat.h
index 716bc0361640..6bf6b0baaccf 100644
--- a/lib/eal/include/rte_compat.h
+++ b/lib/eal/include/rte_compat.h
@@ -68,6 +68,16 @@ _Pragma("GCC diagnostic pop")
__attribute__((section(".text.internal")))
#endif
+/*
+ * Used to by ASAN bounds checker for flexible arrays
+ * Supported by Gcc >= 14 and clang >=18
+ */
+#if __has_attribute(__element_count__)
+# define __rte_counted_by(member) __attribute__((__element_count__(member)))
+#else
+# define __rte_counted_by(member)
+#endif
+
#endif
#ifdef __cplusplus
--
2.43.0
reply other threads:[~2024-03-12 21:03 UTC|newest]
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