[binutils-gdb] btrace: add missing NO_HISTORY

[Markus Metzger <mmetzger at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=cf8f8f0c4244b4980ce538680f81de3738ba08d6

commit cf8f8f0c4244b4980ce538680f81de3738ba08d6
Author: Markus Metzger <markus.t.metzger@intel.com>
Date:   Fri Sep 4 10:33:05 2015 +0200

    btrace: add missing NO_HISTORY
    
    If a single-step ended right at the end of the execution history, we forgot
    to announce that.  Fix it.
    
    gdb/
    	* record-btrace.c (record_btrace_single_step_forward): Return
    	NO_HISTORY if a step brings us to the end of the execution history.

Diff:
---
 gdb/ChangeLog       | 5 +++++
 gdb/record-btrace.c | 5 ++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index e50557f..3fafdef 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
 2015-09-18  Markus Metzger  <markus.t.metzger@intel.com>
 
+	* record-btrace.c (record_btrace_single_step_forward): Return
+	NO_HISTORY if a step brings us to the end of the execution history.
+
+2015-09-18  Markus Metzger  <markus.t.metzger@intel.com>
+
 	* record-btrace.c (record_btrace_step_thread): Move breakpoint check
 	to ...
 	(record_btrace_single_step_forward): ... here and
diff --git a/gdb/record-btrace.c b/gdb/record-btrace.c
index 5e8c1d4..fcd4351 100644
--- a/gdb/record-btrace.c
+++ b/gdb/record-btrace.c
@@ -2061,7 +2061,10 @@ record_btrace_single_step_forward (struct thread_info *tp)
 
   /* We stop replaying if we reached the end of the trace.  */
   if (btrace_insn_cmp (replay, &end) == 0)
-    record_btrace_stop_replaying (tp);
+    {
+      record_btrace_stop_replaying (tp);
+      return btrace_step_no_history ();
+    }
 
   return btrace_step_spurious ();
 }