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/* Copyright (C) 2021-2024 Free Software Foundation, Inc.
Contributed by Oracle.
This file is part of GNU Binutils.
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, 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, 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <errno.h>
#include <string.h>
#include "stopwatch.h"
#define DYNSOROUTINE "so_cputime"
#define DYNSONAME "./so_syn.so"
/* callso -- dynamically link a shared object, and call a routine in it */
#ifndef NONSHARED
static void *so_object = NULL;
static void closeso (void);
int
callso (int k)
{
int i;
char buf[1024];
char *p;
char *q = DYNSONAME;
int errnum;
hrtime_t start = gethrtime ();
hrtime_t vstart = gethrvtime ();
/* Log the event */
wlog ("start of callso", NULL);
/* see if already linked */
if (so_object != NULL)
{
fprintf (stderr, "Execution error -- callso: so_object already linked\n");
return 0;
}
/* open the dynamic shared object */
so_object = NULL;
while (so_object == NULL)
{
so_object = dlopen (DYNSONAME, RTLD_NOW);
if (so_object != NULL)
break;
p = dlerror ();
if (q == NULL)
q = "DYNSONAME";
if (p == NULL)
p = "dlerror() returns NULL";
errnum = errno;
if (errnum == EINTR)
continue; /* retry */
else
{
fprintf (stderr, "Execution error -- callso: dlopen of %s failed--%s, errno=%d (%s)\n",
q, p, errnum, strerror (errnum));
return (0);
}
}
/* look up the routine name in it */
int (*so_routine)() = (int (*)())dlsym (so_object, DYNSOROUTINE);
if (so_routine == NULL)
{
fprintf (stderr, "Execution error -- callso: dlsym %s not found\n",
DYNSOROUTINE);
return (0);
}
/* invoke the routine */
long long count = 0;
do
{
i = (*so_routine)();
count++;
}
while (start + testtime * 1e9 > gethrtime ());
closeso ();
sprintf (buf, "end of callso, %s returned %d", DYNSOROUTINE, i);
wlog (buf, NULL);
fprintf (stderr, " Performed %lld while-loop iterations\n", count);
whrvlog ((gethrtime () - start), (gethrvtime () - vstart), "callso", NULL);
return 0;
}
/* closeso -- close a DSO */
void
closeso (void)
{
/* Log the event */
wlog ("start of closeso", NULL);
/* ensure already linked */
if (so_object == NULL)
{
fprintf (stderr, "Execution error -- closeso: so_object not linked\n");
return;
}
/* close the dynamic shared object */
int rc = dlclose (so_object);
if (rc != 0)
{
fprintf (stderr, "Execution error -- closeso: dlclose() failed--%s\n",
dlerror ());
return;
}
/* clear the pointer */
so_object = NULL;
wlog ("end of closeso", NULL);
return;
}
#else /* NONSHARED */
int
callso (int i)
{
return 0;
}
void
closeso (void)
{
return;
}
#endif /* NONSHARED */
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