From a1473f69bafdc576be8bef7367ff474eade8ce5b Mon Sep 17 00:00:00 2001
From: Kris Katterjohn <katterjohn@gmail.com>
Date: Fri, 4 Oct 2019 20:50:41 -0500
Subject: [PATCH] mmapped heaps: fix for systems with W^X policies
Using read/write/exec causes an error (or possibly abort) on systems
with W^X policies (like OpenBSD and NetBSD have by default).
Since the heap does not need to be executable, just use read/write.
---
gc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gc.c b/gc.c
index 0d938bdd..c3c83dfc 100644
--- a/gc.c
+++ b/gc.c
@@ -500,7 +500,7 @@ sexp_heap sexp_make_heap (size_t size, size_t max_size, size_t chunk_size) {
sexp_free_list free, next;
sexp_heap h;
#if SEXP_USE_MMAP_GC
- h = mmap(NULL, sexp_heap_pad_size(size), PROT_READ|PROT_WRITE|PROT_EXEC,
+ h = mmap(NULL, sexp_heap_pad_size(size), PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, 0);
if (h == MAP_FAILED) return NULL;
#else