From FEDORA_PATCHES Mon Sep 17 00:00:00 2001

From: Jan Kratochvil <jan.kratochvil@redhat.com>

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

Subject: gdb-6.6-bz237572-ppc-atomic-sequence-test.patch

;; Support for stepping over PPC atomic instruction sequences (BZ 237572).

;;=fedoratest

2007-06-25  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* gdb.threads/atomic-seq-threaded.c,

	gdb.threads/atomic-seq-threaded.exp: New files.

diff --git a/gdb/testsuite/gdb.threads/atomic-seq-threaded.c b/gdb/testsuite/gdb.threads/atomic-seq-threaded.c

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.threads/atomic-seq-threaded.c

@@ -0,0 +1,171 @@

+/* This testcase is part of GDB, the GNU debugger.

+

+   Copyright 2007 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 2 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, write to the Free Software

+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

+   MA 02110-1301, USA.  */

+

+/* Test stepping over RISC atomic sequences.

+   This variant testcases the code for stepping another thread while skipping

+   over the atomic sequence in the former thread

+   (STEPPING_PAST_SINGLESTEP_BREAKPOINT).

+   Code comes from gcc/testsuite/gcc.dg/sync-2.c  */

+

+/* { dg-options "-march=i486" { target { { i?86-*-* x86_64-*-* } && ilp32 } } } */

+/* { dg-options "-mcpu=v9" { target sparc*-*-* } } */

+

+/* Test functionality of the intrinsics for 'short' and 'char'.  */

+

+#include <stdlib.h>

+#include <string.h>

+#include <pthread.h>

+#include <assert.h>

+#include <unistd.h>

+

+#define LOOPS 2

+

+static int unused;

+

+static char AI[18];

+static char init_qi[18] = { 3,5,7,9,0,0,0,0,-1,0,0,0,0,0,-1,0,0,0 };

+static char test_qi[18] = { 3,5,7,9,1,4,22,-12,7,8,9,7,1,-12,7,8,9,7 };

+

+static void

+do_qi (void)

+{

+  if (__sync_fetch_and_add(AI+4, 1) != 0)

+    abort ();

+  if (__sync_fetch_and_add(AI+5, 4) != 0)

+    abort ();

+  if (__sync_fetch_and_add(AI+6, 22) != 0)

+    abort ();

+  if (__sync_fetch_and_sub(AI+7, 12) != 0)

+    abort ();

+  if (__sync_fetch_and_and(AI+8, 7) != (char)-1)

+    abort ();

+  if (__sync_fetch_and_or(AI+9, 8) != 0)

+    abort ();

+  if (__sync_fetch_and_xor(AI+10, 9) != 0)

+    abort ();

+  if (__sync_fetch_and_nand(AI+11, 7) != 0)

+    abort ();

+

+  if (__sync_add_and_fetch(AI+12, 1) != 1)

+    abort ();

+  if (__sync_sub_and_fetch(AI+13, 12) != (char)-12)

+    abort ();

+  if (__sync_and_and_fetch(AI+14, 7) != 7)

+    abort ();

+  if (__sync_or_and_fetch(AI+15, 8) != 8)

+    abort ();

+  if (__sync_xor_and_fetch(AI+16, 9) != 9)

+    abort ();

+  if (__sync_nand_and_fetch(AI+17, 7) != 7)

+    abort ();

+}

+

+static short AL[18];

+static short init_hi[18] = { 3,5,7,9,0,0,0,0,-1,0,0,0,0,0,-1,0,0,0 };

+static short test_hi[18] = { 3,5,7,9,1,4,22,-12,7,8,9,7,1,-12,7,8,9,7 };

+

+static void

+do_hi (void)

+{

+  if (__sync_fetch_and_add(AL+4, 1) != 0)

+    abort ();

+  if (__sync_fetch_and_add(AL+5, 4) != 0)

+    abort ();

+  if (__sync_fetch_and_add(AL+6, 22) != 0)

+    abort ();

+  if (__sync_fetch_and_sub(AL+7, 12) != 0)

+    abort ();

+  if (__sync_fetch_and_and(AL+8, 7) != -1)

+    abort ();

+  if (__sync_fetch_and_or(AL+9, 8) != 0)

+    abort ();

+  if (__sync_fetch_and_xor(AL+10, 9) != 0)

+    abort ();

+  if (__sync_fetch_and_nand(AL+11, 7) != 0)

+    abort ();

+

+  if (__sync_add_and_fetch(AL+12, 1) != 1)

+    abort ();

+  if (__sync_sub_and_fetch(AL+13, 12) != -12)

+    abort ();

+  if (__sync_and_and_fetch(AL+14, 7) != 7)

+    abort ();

+  if (__sync_or_and_fetch(AL+15, 8) != 8)

+    abort ();

+  if (__sync_xor_and_fetch(AL+16, 9) != 9)

+    abort ();

+  if (__sync_nand_and_fetch(AL+17, 7) != 7)

+    abort ();

+}

+

+static void *

+start1 (void *arg)

+{

+  unsigned loop;

+  sleep(1);

+

+  for (loop = 0; loop < LOOPS; loop++)

+    {

+      memcpy(AI, init_qi, sizeof(init_qi));

+

+      do_qi ();

+

+      if (memcmp (AI, test_qi, sizeof(test_qi)))

+	abort ();

+    }

+

+  return arg;						/* _delete1_ */

+}

+

+static void *

+start2 (void *arg)

+{

+  unsigned loop;

+

+  for (loop = 0; loop < LOOPS; loop++)

+    {

+      memcpy(AL, init_hi, sizeof(init_hi));

+

+      do_hi ();

+

+      if (memcmp (AL, test_hi, sizeof(test_hi)))

+	abort ();

+    }

+

+  return arg;						/* _delete2_ */

+}

+

+int

+main (int argc, char **argv)

+{

+  pthread_t thread;

+  int i;

+

+  i = pthread_create (&thread, NULL, start1, NULL);	/* _create_ */

+  assert (i == 0);					/* _create_after_ */

+

+  sleep (1);

+

+  start2 (NULL);

+

+  i = pthread_join (thread, NULL);			/* _delete_ */

+  assert (i == 0);

+

+  return 0;						/* _exit_ */

+}

diff --git a/gdb/testsuite/gdb.threads/atomic-seq-threaded.exp b/gdb/testsuite/gdb.threads/atomic-seq-threaded.exp

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.threads/atomic-seq-threaded.exp

@@ -0,0 +1,84 @@

+# atomic-seq-threaded.exp -- Test case for stepping over RISC atomic code seqs.

+# This variant testcases the code for stepping another thread while skipping

+# over the atomic sequence in the former thread

+# (STEPPING_PAST_SINGLESTEP_BREAKPOINT).

+# Copyright (C) 2007 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 2 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, write to the Free Software

+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

+

+# Please email any bugs, comments, and/or additions to this file to:

+# bug-gdb@prep.ai.mit.edu

+

+set testfile atomic-seq-threaded

+set srcfile ${testfile}.c

+set binfile [standard_output_file ${testfile}]

+

+foreach opts {{} {compiler=gcc4} {FAIL}} {

+    if {$opts eq "FAIL"} {

+	return -1

+    }

+    if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug $opts]] eq "" } {

+	break

+    }

+}

+

+gdb_exit

+gdb_start

+gdb_reinitialize_dir $srcdir/$subdir

+

+gdb_load ${binfile}

+if ![runto_main] then {

+   fail "Can't run to main"

+   return 0

+}

+

+# pthread_create () will not pass even on x86_64 with software watchpoint.

+# Pass after pthread_create () without any watchpoint active.

+set line [gdb_get_line_number "_create_after_"]

+gdb_test "tbreak $line" \

+	 "reakpoint (\[0-9\]+) at .*$srcfile, line $line\..*" \

+	 "set breakpoint after pthread_create ()"

+gdb_test "c" \

+	 ".*/\\* _create_after_ \\*/.*" \

+	 "run till after pthread_create ()"

+

+# Without a watchpoint being software no single-stepping would be used.

+set test "Start (software) watchpoint"

+gdb_test_multiple "watch unused" $test {

+    -re "Watchpoint \[0-9\]+: unused.*$gdb_prompt $" {

+	pass $test

+    }

+    -re "Hardware watchpoint \[0-9\]+: unused.*$gdb_prompt $" {

+	# We do not test the goal but still the whole testcase should pass.

+	unsupported $test

+    }

+}

+

+# More thorough testing of the scheduling logic.

+gdb_test "set scheduler-locking step" ""

+

+# Critical code path is stepped through at this point.

+set line [gdb_get_line_number "_exit_"]

+gdb_test "tbreak $line" \

+	 "reakpoint \[0-9\]+ at .*$srcfile, line $line\..*" \

+	 "set breakpoint at _exit_"

+gdb_test "c" \

+	 ".*/\\* _exit_ \\*/.*" \

+	 "run till _exit_"

+

+# Just a nonproblematic program exit.

+gdb_test "c" \

+	 ".*Program exited normally\\..*" \

+	 "run till program exit"