* Ensure that mca_common_sm_mmap_seg_alloc() always returns a word-aligned

pointer.  Otherwise, we can end up segfaulting when the memory area is
  used by the caller.  Fixes a bug reported by Alex Spiegel.

This commit was SVN r9692.

NEWS

@@ -53,6 +53,8 @@ version 1.0.
 1.0.3
 -----
 
+- Fixed segmentation fault with 64 bit applications on Solaris when
+  using the shared memory transports.
 - Fixed MPI_COMM_SELF attributes to free properly at the beginning of
   MPI_FINALIZE.  Thanks to Martin Audet for bringing this to our
   attention.

ompi/mca/common/sm/common_sm_mmap.c

@@ -288,9 +288,18 @@ void* mca_common_sm_mmap_seg_alloc(
     if(seg->seg_offset + *size > map->map_size) {
         addr = NULL;
     } else {
+        size_t fixup;
+
         /* add base address to segment offset */
         addr = map->data_addr + seg->seg_offset;
         seg->seg_offset += *size;
+
+        /* fix up seg_offset so next allocation is aligned on a
+           sizeof(long) boundry.  Do it here so that we don't have to
+           check before checking remaining size in buffer */
+        if ((fixup = (seg->seg_offset & (sizeof(long) - 1))) > 0) {
+            seg->seg_offset += sizeof(long) - fixup;
+        }
     }
     if (NULL != registration) {
         *registration = NULL;