From 70e5f9653d8e11cb4b5ccfde3b76220397318a15 Mon Sep 17 00:00:00 2001
From: Matthew Parkinson <mattpark@microsoft.com>
Date: Fri, 19 Feb 2021 11:50:05 +0000
Subject: [PATCH] Fix BSD usage of POSIX_COMMIT_CHECKS

---
 src/pal/pal_bsd.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/pal/pal_bsd.h b/src/pal/pal_bsd.h
index c408619..1c35776 100644
--- a/src/pal/pal_bsd.h
+++ b/src/pal/pal_bsd.h
@@ -34,7 +34,14 @@ namespace snmalloc
     static void notify_not_using(void* p, size_t size) noexcept
     {
       SNMALLOC_ASSERT(is_aligned_block<OS::page_size>(p, size));
+      // Call this Pal to simulate the Windows decommit in CI.
+#ifdef USE_POSIX_COMMIT_CHECKS
+      memset(p, 0x5a, size);
+#endif
       madvise(p, size, MADV_FREE);
+#ifdef USE_POSIX_COMMIT_CHECKS
+      mprotect(p, size, PROT_NONE);
+#endif
     }
   };
 } // namespace snmalloc