freebsd-dev/lib/libproc/tests/target_prog.c
Mark Johnston 1bdc41d252 Refine symtab sorting in libproc.
Add some rules to more closely match what illumos does when an address
resolves to multiple symbols:
- prefer non-local symbols
- prefer symbols with fewer leading underscores and no leading '$'

Add some regression tests to verify these rules.
2017-11-21 16:03:21 +00:00

83 lines
2.1 KiB
C

/*-
* Copyright (c) 2014 Mark Johnston <markj@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <err.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static volatile sig_atomic_t saw;
static void
usr1(int sig __unused)
{
saw = 1;
}
void foo(void);
void qux(void);
void
foo(void)
{
}
__weak_reference(foo, _foo);
static void
bar(void)
{
}
__strong_reference(bar, baz);
void
qux(void)
{
}
__strong_reference(qux, $qux);
int
main(int argc, char **argv)
{
bar(); /* force the symbol to be emitted */
if (argc == 1)
return (EXIT_SUCCESS);
if (argc == 2 && strcmp(argv[1], "-s") == 0) {
if (signal(SIGUSR1, usr1) == SIG_ERR)
err(1, "signal");
if (kill(getpid(), SIGUSR1) != 0)
err(1, "kill");
return (saw == 1 ? EXIT_SUCCESS : EXIT_FAILURE);
}
return (EXIT_FAILURE);
}