Always map new memory for buffers after dumping.

 src/buffer.c (init_buffer) [USE_MMAP_FOR_BUFFERS]: Always map new
 memory for every buffer that was dumped.

2 files changed, 16 insertions, 10 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index f82a6a298ae..a89d14bbe23 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2014-05-17  Fabrice Popineau  <fabrice.popineau@gmail.com>
+
+	* buffer.c (init_buffer) [USE_MMAP_FOR_BUFFERS]: Always map new
+	memory for every buffer that was dumped.
+
 2014-05-15  Dmitry Antipov  <dmantipov@yandex.ru>
 
 	* fns.c (Freverse): Allow vectors, bool vectors and strings.
diff --git a/src/buffer.c b/src/buffer.c
index a1142479d04..1f0bd3f0970 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -5336,16 +5336,17 @@ init_buffer (void)
   ptrdiff_t len;
 
 #ifdef USE_MMAP_FOR_BUFFERS
- {
-   /* When using the ralloc implementation based on mmap(2), buffer
-      text pointers will have been set to null in the dumped Emacs.
-      Map new memory.  */
-   struct buffer *b;
-
-   FOR_EACH_BUFFER (b)
-     if (b->text->beg == NULL)
-       enlarge_buffer_text (b, 0);
- }
+  {
+    struct buffer *b;
+
+    /* We cannot dump buffers with meaningful addresses that can be
+       used by the dumped Emacs.  We map new memory for them here.  */
+    FOR_EACH_BUFFER (b)
+      {
+	b->text->beg = NULL;
+	enlarge_buffer_text (b, 0);
+      }
+  }
 #endif /* USE_MMAP_FOR_BUFFERS */
 
   Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));