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From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
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From: Jan Kratochvil <jan.kratochvil@redhat.com>
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Date: Fri, 27 Oct 2017 21:07:50 +0200
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Subject: gdb-6.6-bz237572-ppc-atomic-sequence-test.patch
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;; Support for stepping over PPC atomic instruction sequences (BZ 237572).
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;;=fedoratest
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2007-06-25 Jan Kratochvil <jan.kratochvil@redhat.com>
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* gdb.threads/atomic-seq-threaded.c,
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gdb.threads/atomic-seq-threaded.exp: New files.
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diff --git a/gdb/testsuite/gdb.threads/atomic-seq-threaded.c b/gdb/testsuite/gdb.threads/atomic-seq-threaded.c
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new file mode 100644
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--- /dev/null
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+++ b/gdb/testsuite/gdb.threads/atomic-seq-threaded.c
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@@ -0,0 +1,171 @@
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+/* This testcase is part of GDB, the GNU debugger.
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+
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+ Copyright 2007 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 2 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, write to the Free Software
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+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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+ MA 02110-1301, USA. */
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+
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+/* Test stepping over RISC atomic sequences.
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+ This variant testcases the code for stepping another thread while skipping
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+ over the atomic sequence in the former thread
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+ (STEPPING_PAST_SINGLESTEP_BREAKPOINT).
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+ Code comes from gcc/testsuite/gcc.dg/sync-2.c */
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+
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+/* { dg-options "-march=i486" { target { { i?86-*-* x86_64-*-* } && ilp32 } } } */
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+/* { dg-options "-mcpu=v9" { target sparc*-*-* } } */
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+
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+/* Test functionality of the intrinsics for 'short' and 'char'. */
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+
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+#include <stdlib.h>
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+#include <string.h>
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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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+
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+#define LOOPS 2
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+
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+static int unused;
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+
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+static char AI[18];
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+static char init_qi[18] = { 3,5,7,9,0,0,0,0,-1,0,0,0,0,0,-1,0,0,0 };
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+static char test_qi[18] = { 3,5,7,9,1,4,22,-12,7,8,9,7,1,-12,7,8,9,7 };
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+
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+static void
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+do_qi (void)
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+{
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+ if (__sync_fetch_and_add(AI+4, 1) != 0)
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+ abort ();
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+ if (__sync_fetch_and_add(AI+5, 4) != 0)
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+ abort ();
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+ if (__sync_fetch_and_add(AI+6, 22) != 0)
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+ abort ();
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+ if (__sync_fetch_and_sub(AI+7, 12) != 0)
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+ abort ();
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+ if (__sync_fetch_and_and(AI+8, 7) != (char)-1)
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+ abort ();
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+ if (__sync_fetch_and_or(AI+9, 8) != 0)
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+ abort ();
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+ if (__sync_fetch_and_xor(AI+10, 9) != 0)
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+ abort ();
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+ if (__sync_fetch_and_nand(AI+11, 7) != 0)
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+ abort ();
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+
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+ if (__sync_add_and_fetch(AI+12, 1) != 1)
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+ abort ();
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+ if (__sync_sub_and_fetch(AI+13, 12) != (char)-12)
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+ abort ();
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+ if (__sync_and_and_fetch(AI+14, 7) != 7)
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+ abort ();
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+ if (__sync_or_and_fetch(AI+15, 8) != 8)
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+ abort ();
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+ if (__sync_xor_and_fetch(AI+16, 9) != 9)
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+ abort ();
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+ if (__sync_nand_and_fetch(AI+17, 7) != 7)
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+ abort ();
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+}
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+
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+static short AL[18];
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+static short init_hi[18] = { 3,5,7,9,0,0,0,0,-1,0,0,0,0,0,-1,0,0,0 };
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+static short test_hi[18] = { 3,5,7,9,1,4,22,-12,7,8,9,7,1,-12,7,8,9,7 };
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+
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+static void
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+do_hi (void)
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+{
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+ if (__sync_fetch_and_add(AL+4, 1) != 0)
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+ abort ();
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+ if (__sync_fetch_and_add(AL+5, 4) != 0)
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+ abort ();
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+ if (__sync_fetch_and_add(AL+6, 22) != 0)
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+ abort ();
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+ if (__sync_fetch_and_sub(AL+7, 12) != 0)
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+ abort ();
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+ if (__sync_fetch_and_and(AL+8, 7) != -1)
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+ abort ();
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+ if (__sync_fetch_and_or(AL+9, 8) != 0)
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+ abort ();
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+ if (__sync_fetch_and_xor(AL+10, 9) != 0)
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+ abort ();
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+ if (__sync_fetch_and_nand(AL+11, 7) != 0)
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+ abort ();
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+
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+ if (__sync_add_and_fetch(AL+12, 1) != 1)
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+ abort ();
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+ if (__sync_sub_and_fetch(AL+13, 12) != -12)
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+ abort ();
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+ if (__sync_and_and_fetch(AL+14, 7) != 7)
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+ abort ();
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+ if (__sync_or_and_fetch(AL+15, 8) != 8)
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+ abort ();
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+ if (__sync_xor_and_fetch(AL+16, 9) != 9)
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+ abort ();
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+ if (__sync_nand_and_fetch(AL+17, 7) != 7)
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+ abort ();
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+}
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+
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+static void *
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+start1 (void *arg)
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+{
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+ unsigned loop;
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+ sleep(1);
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+
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+ for (loop = 0; loop < LOOPS; loop++)
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+ {
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+ memcpy(AI, init_qi, sizeof(init_qi));
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+
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+ do_qi ();
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+
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+ if (memcmp (AI, test_qi, sizeof(test_qi)))
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+ abort ();
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+ }
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+
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+ return arg; /* _delete1_ */
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+}
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+
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+static void *
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+start2 (void *arg)
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+{
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+ unsigned loop;
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+
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+ for (loop = 0; loop < LOOPS; loop++)
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+ {
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+ memcpy(AL, init_hi, sizeof(init_hi));
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+
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+ do_hi ();
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+
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+ if (memcmp (AL, test_hi, sizeof(test_hi)))
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+ abort ();
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+ }
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+
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+ return arg; /* _delete2_ */
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+}
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+
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+int
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+main (int argc, char **argv)
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+{
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+ pthread_t thread;
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+ int i;
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+
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+ i = pthread_create (&thread, NULL, start1, NULL); /* _create_ */
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+ assert (i == 0); /* _create_after_ */
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+
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+ sleep (1);
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+
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+ start2 (NULL);
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+
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+ i = pthread_join (thread, NULL); /* _delete_ */
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+ assert (i == 0);
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+
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+ return 0; /* _exit_ */
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+}
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diff --git a/gdb/testsuite/gdb.threads/atomic-seq-threaded.exp b/gdb/testsuite/gdb.threads/atomic-seq-threaded.exp
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new file mode 100644
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--- /dev/null
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+++ b/gdb/testsuite/gdb.threads/atomic-seq-threaded.exp
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@@ -0,0 +1,84 @@
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+# atomic-seq-threaded.exp -- Test case for stepping over RISC atomic code seqs.
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+# This variant testcases the code for stepping another thread while skipping
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+# over the atomic sequence in the former thread
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+# (STEPPING_PAST_SINGLESTEP_BREAKPOINT).
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+# Copyright (C) 2007 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 2 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, write to the Free Software
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+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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+
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+# Please email any bugs, comments, and/or additions to this file to:
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+# bug-gdb@prep.ai.mit.edu
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+
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+set testfile atomic-seq-threaded
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+set srcfile ${testfile}.c
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+set binfile [standard_output_file ${testfile}]
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+
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+foreach opts {{} {compiler=gcc4} {FAIL}} {
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+ if {$opts eq "FAIL"} {
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+ return -1
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+ }
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+ if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug $opts]] eq "" } {
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+ break
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+ }
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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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+gdb_load ${binfile}
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+if ![runto_main] then {
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+ fail "Can't run to main"
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+ return 0
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+}
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+
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+# pthread_create () will not pass even on x86_64 with software watchpoint.
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+# Pass after pthread_create () without any watchpoint active.
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+set line [gdb_get_line_number "_create_after_"]
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+gdb_test "tbreak $line" \
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+ "reakpoint (\[0-9\]+) at .*$srcfile, line $line\..*" \
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+ "set breakpoint after pthread_create ()"
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+gdb_test "c" \
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+ ".*/\\* _create_after_ \\*/.*" \
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+ "run till after pthread_create ()"
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+
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+# Without a watchpoint being software no single-stepping would be used.
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+set test "Start (software) watchpoint"
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+gdb_test_multiple "watch unused" $test {
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+ -re "Watchpoint \[0-9\]+: unused.*$gdb_prompt $" {
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+ pass $test
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+ }
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+ -re "Hardware watchpoint \[0-9\]+: unused.*$gdb_prompt $" {
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+ # We do not test the goal but still the whole testcase should pass.
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+ unsupported $test
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+ }
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+}
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+
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+# More thorough testing of the scheduling logic.
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+gdb_test "set scheduler-locking step" ""
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+
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+# Critical code path is stepped through at this point.
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+set line [gdb_get_line_number "_exit_"]
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+gdb_test "tbreak $line" \
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+ "reakpoint \[0-9\]+ at .*$srcfile, line $line\..*" \
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+ "set breakpoint at _exit_"
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+gdb_test "c" \
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+ ".*/\\* _exit_ \\*/.*" \
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+ "run till _exit_"
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+
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+# Just a nonproblematic program exit.
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+gdb_test "c" \
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+ ".*Program exited normally\\..*" \
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+ "run till program exit"
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