From FEDORA_PATCHES Mon Sep 17 00:00:00 2001

From: Fedora GDB patches <invalid@email.com>

Date: Fri, 27 Oct 2017 21:07:50 +0200

Subject: gdb-simultaneous-step-resume-breakpoint-test.patch

;; New test for step-resume breakpoint placed in multiple threads at once.

;;=fedoratest

diff --git a/gdb/testsuite/gdb.threads/simultaneous-step-resume-breakpoint.c b/gdb/testsuite/gdb.threads/simultaneous-step-resume-breakpoint.c

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.threads/simultaneous-step-resume-breakpoint.c

@@ -0,0 +1,79 @@

+/* Copyright 2009 Free Software Foundation, Inc.

+

+   Written by Fred Fish of Cygnus Support

+   Contributed by Cygnus Support

+

+   This file is part of GDB.

+

+   This program is free software; you can redistribute it and/or modify

+   it under the terms of the GNU General Public License as published by

+   the Free Software Foundation; either version 3 of the License, or

+   (at your option) any later version.

+

+   This program is distributed in the hope that it will be useful,

+   but WITHOUT ANY WARRANTY; without even the implied warranty of

+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

+   GNU General Public License for more details.

+

+   You should have received a copy of the GNU General Public License

+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

+

+/* Test multiple threads stepping into a .debug_line-less function with

+   a breakpoint placed on its return-to-caller point.  */

+

+#include <pthread.h>

+#include <assert.h>

+#include <unistd.h>

+#include <errno.h>

+#include <stdio.h>

+

+#define THREADS 3

+

+static void *

+func (void *unused)

+{

+  int i;

+

+  errno = 0;

+  i = 0xdeadf00d;

+  i = sleep (THREADS);	/* sleep-call */

+  if (errno != 0)	/* sleep-after */

+    perror ("sleep");

+

+  /* The GDB bug with forgotten step-resume breakpoint could leave stale

+     breakpoint on the I assignment making it a nop.  */

+  if (i == 0xdeadf00d)

+    assert (0);

+

+  assert (i == 0);

+

+  pthread_exit (NULL);

+}

+

+int

+main (void)

+{

+  pthread_t threads[THREADS];

+  int threadi;

+

+  for (threadi = 0; threadi < THREADS; threadi++)

+    {

+      int i;

+

+      i = pthread_create (&threads[threadi], NULL, func, NULL);

+      assert (i == 0);

+

+      i = sleep (1);

+      assert (i == 0);

+    }

+

+  for (threadi = 0; threadi < THREADS; threadi++)

+    {

+      int i;

+

+      i = pthread_join (threads[threadi], NULL);

+      assert (i == 0);

+    }

+

+  return 0;	/* final-exit */

+}

diff --git a/gdb/testsuite/gdb.threads/simultaneous-step-resume-breakpoint.exp b/gdb/testsuite/gdb.threads/simultaneous-step-resume-breakpoint.exp

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.threads/simultaneous-step-resume-breakpoint.exp

@@ -0,0 +1,65 @@

+# Copyright (C) 2009 Free Software Foundation, Inc.

+

+# This program is free software; you can redistribute it and/or modify

+# it under the terms of the GNU General Public License as published by

+# the Free Software Foundation; either version 3 of the License, or

+# (at your option) any later version.

+#

+# This program is distributed in the hope that it will be useful,

+# but WITHOUT ANY WARRANTY; without even the implied warranty of

+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

+# GNU General Public License for more details.

+#

+# You should have received a copy of the GNU General Public License

+# along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

+

+# Test multiple threads stepping into a .debug_line-less function with

+# a breakpoint placed on its return-to-caller point.

+

+set testfile simultaneous-step-resume-breakpoint

+set srcfile ${testfile}.c

+set binfile [standard_output_file ${testfile}]

+

+if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {

+    return -1

+}

+

+gdb_exit

+gdb_start

+gdb_reinitialize_dir $srcdir/$subdir

+

+# Ensure we have no debuginfo for the `sleep' call itself (=for libc).

+gdb_test "set debug-file-directory /DoesNotExist"

+

+gdb_load ${binfile}

+if ![runto_main] {

+   return -1

+}

+

+# Red Hat vendor patch does set it to "step" by default.

+gdb_test "set scheduler-locking off"

+

+gdb_breakpoint [gdb_get_line_number "final-exit"]

+

+gdb_breakpoint [gdb_get_line_number "sleep-call"]

+gdb_continue_to_breakpoint "sleep-call"

+

+gdb_test "step" "sleep-call.*" "step thread 1"

+gdb_test "step" "sleep-call.*" "step thread 2"

+gdb_test "step" "sleep-after.*" "step thread 3"

+

+set test "first continue"

+gdb_test_multiple "continue" $test {

+    -re "final-exit.*$gdb_prompt $" {

+	# gdb-7.0.

+	pass $test

+	return

+    }

+    -re "sleep-after.*$gdb_prompt $" {

+	# Fedora/RHEL branch.

+	pass $test

+    }

+}

+

+gdb_test "continue" "sleep-after.*" "second continue"

+gdb_test "continue" "final-exit.*" "third continue"