src/w32heap.c (realloc_before_dump): Improve commentary.

[gnu-emacs] / src / w32heap.c

diff --git a/src/w32heap.c b/src/w32heap.c
index cc08dc372196354d10aa4b06b30196af1e4ef1e5..523df909165d88126dbca8b4af4f7110be66dbca 100644 (file)
--- a/src/w32heap.c
+++ b/src/w32heap.c
@@ -417,6 +417,12 @@ realloc_before_dump (void *ptr, size_t size)
          malloc_before_dump() and free_before_dump() will take care of
          reallocation.  */
       p = malloc_before_dump (size);
+      /* If SIZE is below MaxBlockSize, malloc_before_dump will try to
+        allocate it in the fixed heap.  If that fails, we could have
+        kept the block in its original place, above bc_limit, instead
+        of failing the call as below.  But this doesn't seem to be
+        worth the added complexity, as loadup allocates only a very
+        small number of large blocks, and never reallocates them.  */
       if (p)
        {
          CopyMemory (p, ptr, size);