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Change VOLATILE_MEMORY_BARRIER for x64 Unix #131807

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Merged
janvorli merged 1 commit into from
Aug 4, 2026
+2 −2
Merged

Change VOLATILE_MEMORY_BARRIER for x64 Unix #131807

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2 changes: 1 addition & 1 deletion src/coreclr/gc/env/volatile.h
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Expand Up @@ -90,7 +90,7 @@
// Please do not use this macro outside of this file. It is subject to change or removal without
// notice.
//
#define VOLATILE_MEMORY_BARRIER() asm volatile ("" : : : "memory")
#define VOLATILE_MEMORY_BARRIER() __atomic_signal_fence(__ATOMIC_SEQ_CST)
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#endif // HOST_ARM || HOST_ARM64
#elif (defined(HOST_ARM) || defined(HOST_ARM64)) && _ISO_VOLATILE
// ARM & ARM64 have a very weak memory model and very few tools to control that model. We're forced to perform a full
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2 changes: 1 addition & 1 deletion src/coreclr/inc/volatile.h
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Expand Up @@ -100,7 +100,7 @@
// Please do not use this macro outside of this file. It is subject to change or removal without
// notice.
//
#define VOLATILE_MEMORY_BARRIER() asm volatile ("" : : : "memory")
#define VOLATILE_MEMORY_BARRIER() __atomic_signal_fence(__ATOMIC_SEQ_CST)
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#endif // HOST_ARM || HOST_ARM64

#elif (defined(HOST_ARM) || defined(HOST_ARM64)) && _ISO_VOLATILE
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