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* contrib/expect-read1.c: New file.
	* contrib/expect-read1.sh: New file.
This commit is contained in:
Jan Kratochvil
2013-02-03 16:27:57 +00:00
parent 233d95b548
commit 0f1b18abb4
3 changed files with 87 additions and 0 deletions
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gdb/ChangeLog
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2013-02-03 Jan Kratochvil <jan.kratochvil@redhat.com>
* contrib/expect-read1.c: New file.
* contrib/expect-read1.sh: New file.
2013-02-03 Jan Kratochvil <jan.kratochvil@redhat.com>
* dwarf2read.c (file_file_name): New function with code from

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gdb/contrib/expect-read1.c Normal file
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/* 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);
}

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gdb/contrib/expect-read1.sh Normal file
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#! /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 "$@"