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authorJan Kratochvil <jan.kratochvil@redhat.com>2013-02-03 16:27:57 +0000
committerJan Kratochvil <jan.kratochvil@redhat.com>2013-02-03 16:27:57 +0000
commit0f1b18abb46844c01accf8cd0a698ea419fb3ee6 (patch)
tree3a0b621b985818944bd3123a3b3bff732a0f3a20 /gdb/contrib
parent233d95b548ec948c4a6d01cd05c307385dd615fb (diff)
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* contrib/expect-read1.c: New file. * contrib/expect-read1.sh: New file.
Diffstat (limited to 'gdb/contrib')
-rw-r--r--gdb/contrib/expect-read1.c40
-rw-r--r--gdb/contrib/expect-read1.sh42
2 files changed, 82 insertions, 0 deletions
diff --git a/gdb/contrib/expect-read1.c b/gdb/contrib/expect-read1.c
new file mode 100644
index 0000000..963c1ff
--- /dev/null
+++ b/gdb/contrib/expect-read1.c
@@ -0,0 +1,40 @@
+/* Copyright (C) 2013 Free Software Foundation, Inc.
+
+ 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/>. */
+
+/* RTLD_NEXT requires _GNU_SOURCE. */
+#define _GNU_SOURCE 1
+#include <dlfcn.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+
+ssize_t
+read (int fd, void *buf, size_t count)
+{
+ static ssize_t (*read2) (int fd, void *buf, size_t count) = NULL;
+
+ if (read2 == NULL)
+ {
+ unsetenv ("LD_PRELOAD");
+ read2 = dlsym (RTLD_NEXT, "read");
+ }
+
+ if (count > 1 && isatty (fd) == 1)
+ count = 1;
+
+ return read2 (fd, buf, count);
+}
diff --git a/gdb/contrib/expect-read1.sh b/gdb/contrib/expect-read1.sh
new file mode 100644
index 0000000..ad32520
--- /dev/null
+++ b/gdb/contrib/expect-read1.sh
@@ -0,0 +1,42 @@
+#! /bin/sh
+# runtest wrapper to reliably reproduce racy incomplete reads in the testsuite.
+
+# Copyright (C) 2013 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/>.
+
+# This tool excercise any incomplete reads handling in the testsuite by
+# simulating read always returns just 1 character.
+# Testsuite incompatibilities are tracked as GDB PR testsuite/12649.
+
+# Example usage:
+#
+# bash$ cd $objdir/gdb/testsuite
+# bash$ EXPECT=$srcdir/gdb/contrib/expect-read1.sh runtest
+# or
+# bash$ EXPECT=../contrib/expect-read1.sh runtest
+
+C=`echo $0|sed 's/\.sh$/.c/'`
+if ! test -e $C; then
+ echo >&2 "$0: Cannot find 'srcdir/gdb/contrib/expect-read1.c' at '$C'."
+ exit 2
+fi
+SO=/tmp/expect-read1.$$.so
+rm -f $SO
+CMD="${CC_FOR_TARGET:-gcc} -o $SO -Wall -fPIC -shared $C"
+if ! $CMD; then
+ echo >&2 "$0: Failed: $CMD"
+ exit 2
+fi
+trap "rm -f $SO" EXIT
+LD_PRELOAD=$SO expect "$@"