From dec414188f5a04db0ac23ba29515de0a1f3ed4b8 Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Sat, 12 Jul 1997 07:04:43 +0000
Subject: [PATCH] (r_alloc_reinit): New function.

---
 src/ralloc.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/ralloc.c b/src/ralloc.c
index 5373212a483..d1ce3be24fc 100644
--- a/src/ralloc.c
+++ b/src/ralloc.c
@@ -1150,6 +1150,24 @@ r_alloc_init ()
   virtual_break_value = break_value = first_heap->bloc_start = first_heap->end;
   use_relocatable_buffers = 1;
 }
+
+#if defined (emacs) && defined (DOUG_LEA_MALLOC)
+
+/* Reinitialize the morecore hook variables after restarting a dumped
+   Emacs.  This is needed when using Doug Lea's malloc from GNU libc.  */
+void
+r_alloc_reinit ()
+{
+  /* Only do this if the hook has been reset, so that we don't get an
+     infinite loop, in case Emacs was linked statically.  */
+  if (__morecore != r_alloc_sbrk)
+    {
+      real_morecore = __morecore;
+      __morecore = r_alloc_sbrk;
+    }
+}
+#endif
+
 #ifdef DEBUG
 #include <assert.h>
 
-- 
2.39.5