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/*
* Copyright (c) 2004-2007 Ulrich Drepper <drepper@redhat.com>
* Copyright (c) 2004 Roland McGrath <roland@redhat.com>
* Copyright (c) 2005-2015 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2015-2018 The strace developers.
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 "defs.h"
#include <fcntl.h>
#include <sys/epoll.h>
SYS_FUNC(epoll_create)
{
tprintf("%d", (int) tcp->u_arg[0]);
return RVAL_DECODED | RVAL_FD;
}
#include "xlat/epollflags.h"
SYS_FUNC(epoll_create1)
{
printflags(epollflags, tcp->u_arg[0], "EPOLL_???");
return RVAL_DECODED | RVAL_FD;
}
#include "xlat/epollevents.h"
static bool
print_epoll_event(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
{
const struct epoll_event *ev = elem_buf;
tprints("{");
printflags(epollevents, ev->events, "EPOLL???");
/* We cannot know what format the program uses, so print u32 and u64
which will cover every value. */
tprintf(", {u32=%" PRIu32 ", u64=%" PRIu64 "}}",
ev->data.u32, ev->data.u64);
return true;
}
#include "xlat/epollctls.h"
SYS_FUNC(epoll_ctl)
{
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
const unsigned int op = tcp->u_arg[1];
printxval(epollctls, op, "EPOLL_CTL_???");
tprints(", ");
printfd(tcp, tcp->u_arg[2]);
tprints(", ");
struct epoll_event ev;
if (EPOLL_CTL_DEL == op)
printaddr(tcp->u_arg[3]);
else if (!umove_or_printaddr(tcp, tcp->u_arg[3], &ev))
print_epoll_event(tcp, &ev, sizeof(ev), 0);
return RVAL_DECODED;
}
static void
epoll_wait_common(struct tcb *tcp)
{
if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
} else {
struct epoll_event ev;
print_array(tcp, tcp->u_arg[1], tcp->u_rval, &ev, sizeof(ev),
tfetch_mem, print_epoll_event, 0);
tprintf(", %d, %d", (int) tcp->u_arg[2], (int) tcp->u_arg[3]);
}
}
SYS_FUNC(epoll_wait)
{
epoll_wait_common(tcp);
return 0;
}
SYS_FUNC(epoll_pwait)
{
epoll_wait_common(tcp);
if (exiting(tcp)) {
tprints(", ");
/* NB: kernel requires arg[5] == NSIG_BYTES */
print_sigset_addr_len(tcp, tcp->u_arg[4], tcp->u_arg[5]);
tprintf(", %" PRI_klu, tcp->u_arg[5]);
}
return 0;
}
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