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Index: gdb-7.10.90.20160211/gdb/testsuite/gdb.threads/simultaneous-step-resume-breakpoint.exp
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===================================================================
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--- /dev/null	1970-01-01 00:00:00.000000000 +0000
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+++ gdb-7.10.90.20160211/gdb/testsuite/gdb.threads/simultaneous-step-resume-breakpoint.exp	2016-02-15 23:38:23.366044101 +0100
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@@ -0,0 +1,65 @@
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+# Copyright (C) 2009 Free Software Foundation, Inc.
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+
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+# This program is free software; you can redistribute it and/or modify
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+# it under the terms of the GNU General Public License as published by
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+# the Free Software Foundation; either version 3 of the License, or
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+# (at your option) any later version.
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+#
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+# This program is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY; without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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+# GNU General Public License for more details.
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+#
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+# You should have received a copy of the GNU General Public License
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+# along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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+
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+# Test multiple threads stepping into a .debug_line-less function with
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+# a breakpoint placed on its return-to-caller point.
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+
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+set testfile simultaneous-step-resume-breakpoint
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+set srcfile ${testfile}.c
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+set binfile [standard_output_file ${testfile}]
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+
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+if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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+    return -1
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+}
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+
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+gdb_exit
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+gdb_start
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+gdb_reinitialize_dir $srcdir/$subdir
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+
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+# Ensure we have no debuginfo for the `sleep' call itself (=for libc).
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+gdb_test "set debug-file-directory /DoesNotExist"
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+
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+gdb_load ${binfile}
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+if ![runto_main] {
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+   return -1
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+}
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+
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+# Red Hat vendor patch does set it to "step" by default.
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+gdb_test "set scheduler-locking off"
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+
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+gdb_breakpoint [gdb_get_line_number "final-exit"]
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+
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+gdb_breakpoint [gdb_get_line_number "sleep-call"]
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+gdb_continue_to_breakpoint "sleep-call"
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+
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+gdb_test "step" "sleep-call.*" "step thread 1"
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+gdb_test "step" "sleep-call.*" "step thread 2"
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+gdb_test "step" "sleep-after.*" "step thread 3"
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+
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+set test "first continue"
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+gdb_test_multiple "continue" $test {
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+    -re "final-exit.*$gdb_prompt $" {
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+	# gdb-7.0.
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+	pass $test
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+	return
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+    }
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+    -re "sleep-after.*$gdb_prompt $" {
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+	# Fedora/RHEL branch.
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+	pass $test
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+    }
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+}
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+
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+gdb_test "continue" "sleep-after.*" "second continue"
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+gdb_test "continue" "final-exit.*" "third continue"
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Index: gdb-7.10.90.20160211/gdb/testsuite/gdb.threads/simultaneous-step-resume-breakpoint.c
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===================================================================
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--- /dev/null	1970-01-01 00:00:00.000000000 +0000
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+++ gdb-7.10.90.20160211/gdb/testsuite/gdb.threads/simultaneous-step-resume-breakpoint.c	2016-02-15 23:38:18.257007826 +0100
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@@ -0,0 +1,79 @@
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+/* Copyright 2009 Free Software Foundation, Inc.
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+
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+   Written by Fred Fish of Cygnus Support
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+   Contributed by Cygnus Support
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+
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+   This file is part of GDB.
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+
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+   This program is free software; you can redistribute it and/or modify
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+   it under the terms of the GNU General Public License as published by
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+   the Free Software Foundation; either version 3 of the License, or
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+   (at your option) any later version.
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+
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+   This program is distributed in the hope that it will be useful,
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+   but WITHOUT ANY WARRANTY; without even the implied warranty of
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+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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+   GNU General Public License for more details.
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+
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+   You should have received a copy of the GNU General Public License
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+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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+
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+/* Test multiple threads stepping into a .debug_line-less function with
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+   a breakpoint placed on its return-to-caller point.  */
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+
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+#include <pthread.h>
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+#include <assert.h>
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+#include <unistd.h>
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+#include <errno.h>
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+#include <stdio.h>
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+
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+#define THREADS 3
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+
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+static void *
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+func (void *unused)
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+{
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+  int i;
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+
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+  errno = 0;
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+  i = 0xdeadf00d;
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+  i = sleep (THREADS);	/* sleep-call */
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+  if (errno != 0)	/* sleep-after */
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+    perror ("sleep");
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+
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+  /* The GDB bug with forgotten step-resume breakpoint could leave stale
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+     breakpoint on the I assignment making it a nop.  */
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+  if (i == 0xdeadf00d)
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+    assert (0);
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+
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+  assert (i == 0);
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+
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+  pthread_exit (NULL);
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+}
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+
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+int
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+main (void)
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+{
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+  pthread_t threads[THREADS];
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+  int threadi;
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+
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+  for (threadi = 0; threadi < THREADS; threadi++)
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+    {
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+      int i;
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+
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+      i = pthread_create (&threads[threadi], NULL, func, NULL);
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+      assert (i == 0);
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+
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+      i = sleep (1);
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+      assert (i == 0);
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+    }
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+
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+  for (threadi = 0; threadi < THREADS; threadi++)
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+    {
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+      int i;
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+
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+      i = pthread_join (threads[threadi], NULL);
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+      assert (i == 0);
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+    }
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+
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+  return 0;	/* final-exit */
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+}