gdb/testuite/

	* gdb.trace/unavailable.cc (a, b, c): New globals.
	(main): Set and clear them.
	* gdb.trace/unavailable.exp (gdb_collect_globals_test): Collect
	`a' and `c', and check that `b' isn't collected, although `a' and
	`c' are.

	gdb/
	* tracepoint.c (memrange_sortmerge): Don't merge ranges that are
	almost but not quite adjacent.

1 files changed, 5 insertions, 6 deletions

diff --git a/gdb/tracepoint.c b/gdb/tracepoint.c
index 498f47c12d8..3eae9376bd0 100644
--- a/gdb/tracepoint.c
+++ b/gdb/tracepoint.c
@@ -841,13 +841,12 @@ memrange_sortmerge (struct collection_list *memranges)
     {
       for (a = 0, b = 1; b < memranges->next_memrange; b++)
 	{
-	  if (memranges->list[a].type == memranges->list[b].type &&
-	      memranges->list[b].start - memranges->list[a].end <=
-	      MAX_REGISTER_SIZE)
+	  /* If memrange b overlaps or is adjacent to memrange a,
+	     merge them.  */
+	  if (memranges->list[a].type == memranges->list[b].type
+	      && memranges->list[b].start <= memranges->list[a].end)
 	    {
-	      /* memrange b starts before memrange a ends; merge them.  */
-	      if (memranges->list[b].end > memranges->list[a].end)
-		memranges->list[a].end = memranges->list[b].end;
+	      memranges->list[a].end = memranges->list[b].end;
 	      continue;		/* next b, same a */
 	    }
 	  a++;			/* next a */