From: "Ondřej Surý via lttng-dev" <lttng-dev@lists.lttng.org>
To: lttng-dev@lists.lttng.org
Subject: [lttng-dev] [PATCH 3/7] Use __atomic_signal_fence() for cmm_barrier()
Date: Tue, 21 Mar 2023 14:30:58 +0100 [thread overview]
Message-ID: <20230321133102.1054238-4-ondrej@sury.org> (raw)
In-Reply-To: <20230321133102.1054238-1-ondrej@sury.org>
Use __atomic_signal_fence(__ATOMIC_SEQ_CST) for cmm_barrier(), so
ThreadSanitizer can understand the memory synchronization.
Signed-off-by: Ondřej Surý <ondrej@sury.org>
---
include/urcu/compiler.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/urcu/compiler.h b/include/urcu/compiler.h
index 2f32b38..5763378 100644
--- a/include/urcu/compiler.h
+++ b/include/urcu/compiler.h
@@ -28,7 +28,7 @@
#define caa_likely(x) __builtin_expect(!!(x), 1)
#define caa_unlikely(x) __builtin_expect(!!(x), 0)
-#define cmm_barrier() __asm__ __volatile__ ("" : : : "memory")
+#define cmm_barrier() __atomic_signal_fence(__ATOMIC_SEQ_CST)
/*
* Instruct the compiler to perform only a single access to a variable
--
2.39.2
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next prev parent reply other threads:[~2023-03-21 13:31 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-21 13:30 [lttng-dev] (no subject) Ondřej Surý via lttng-dev
2023-03-21 13:30 ` [lttng-dev] [PATCH 1/7] Require __atomic builtins to build Ondřej Surý via lttng-dev
2023-03-21 19:26 ` Mathieu Desnoyers via lttng-dev
2023-03-21 13:30 ` [lttng-dev] [PATCH 2/7] Use gcc __atomic builtis for <urcu/uatomic.h> implementation Ondřej Surý via lttng-dev
2023-03-21 20:03 ` Mathieu Desnoyers via lttng-dev
2023-03-21 13:30 ` Ondřej Surý via lttng-dev [this message]
2023-03-21 13:30 ` [lttng-dev] [PATCH 4/7] Replace the internal pointer manipulation with __atomic builtins Ondřej Surý via lttng-dev
2023-03-21 13:31 ` [lttng-dev] [PATCH 5/7] Replace the arch-specific memory barriers " Ondřej Surý via lttng-dev
2023-03-21 20:19 ` Mathieu Desnoyers via lttng-dev
2023-03-21 13:31 ` [lttng-dev] [PATCH 6/7] Use __atomic builtins to implement CMM_{LOAD, STORE}_SHARED Ondřej Surý via lttng-dev
2023-03-21 13:31 ` [lttng-dev] [PATCH 7/7] Fix: uatomic_or() need retyping to uintptr_t in rculfhash.c Ondřej Surý via lttng-dev
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