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[binutils-gdb] [gdb/testsuite] Fix target_supports_scheduler_locking raciness


https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=58bbcd02dee8ba018b97706c068ed8ed7afac15d

commit 58bbcd02dee8ba018b97706c068ed8ed7afac15d
Author: Tom de Vries <tdevries@suse.de>
Date:   Thu Oct 4 14:10:39 2018 +0200

    [gdb/testsuite] Fix target_supports_scheduler_locking raciness
    
    When calling gdb_start_cmd, it's the caller's responsibility to wait for gdb
    to return to the prompt.  In target_supports_scheduler_locking, that's not the
    case, and consequently, target_supports_scheduler_locking fails spuriously.
    
    Fix by using runto_main instead.
    
    Build and reg-tested on x86_64-linux.
    
    2018-10-09  Tom de Vries  <tdevries@suse.de>
    
    	* lib/gdb.exp (target_supports_scheduler_locking): Replace gdb_start_cmd
    	with runto_main.

Diff:
---
 gdb/testsuite/ChangeLog   | 5 +++++
 gdb/testsuite/lib/gdb.exp | 4 +++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index d35abb5..c627578 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-10-09  Tom de Vries  <tdevries@suse.de>
+
+	* lib/gdb.exp (target_supports_scheduler_locking): Replace gdb_start_cmd
+	with runto_main.
+
 2018-10-08  Weimin Pan  <weimin.pan@oracle.com>
 
 	PR c++/16841
diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index e91a3c8..2d197d9 100644
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -5971,7 +5971,9 @@ gdb_caching_proc target_supports_scheduler_locking {
     }
 
     clean_restart $obj
-    gdb_start_cmd
+    if ![runto_main] {
+        return 0
+    }
 
     set supports_schedule_locking -1
     set current_schedule_locking_mode ""


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