/*
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* Copyright (c) 2004-2007 Ulrich Drepper <drepper@redhat.com>
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* Copyright (c) 2004 Roland McGrath <roland@redhat.com>
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* Copyright (c) 2005-2015 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2015-2018 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "defs.h"
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#include <fcntl.h>
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#include <sys/epoll.h>
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SYS_FUNC(epoll_create)
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{
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tprintf("%d", (int) tcp->u_arg[0]);
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return RVAL_DECODED | RVAL_FD;
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}
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#include "xlat/epollflags.h"
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SYS_FUNC(epoll_create1)
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{
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printflags(epollflags, tcp->u_arg[0], "EPOLL_???");
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return RVAL_DECODED | RVAL_FD;
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}
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#include "xlat/epollevents.h"
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static bool
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print_epoll_event(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
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{
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const struct epoll_event *ev = elem_buf;
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tprints("{");
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printflags(epollevents, ev->events, "EPOLL???");
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/* We cannot know what format the program uses, so print u32 and u64
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which will cover every value. */
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tprintf(", {u32=%" PRIu32 ", u64=%" PRIu64 "}}",
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ev->data.u32, ev->data.u64);
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return true;
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}
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#include "xlat/epollctls.h"
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SYS_FUNC(epoll_ctl)
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{
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printfd(tcp, tcp->u_arg[0]);
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tprints(", ");
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const unsigned int op = tcp->u_arg[1];
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printxval(epollctls, op, "EPOLL_CTL_???");
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tprints(", ");
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printfd(tcp, tcp->u_arg[2]);
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tprints(", ");
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struct epoll_event ev;
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if (EPOLL_CTL_DEL == op)
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printaddr(tcp->u_arg[3]);
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else if (!umove_or_printaddr(tcp, tcp->u_arg[3], &ev))
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print_epoll_event(tcp, &ev, sizeof(ev), 0);
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return RVAL_DECODED;
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}
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static void
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epoll_wait_common(struct tcb *tcp)
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{
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if (entering(tcp)) {
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printfd(tcp, tcp->u_arg[0]);
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tprints(", ");
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} else {
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struct epoll_event ev;
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print_array(tcp, tcp->u_arg[1], tcp->u_rval, &ev, sizeof(ev),
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tfetch_mem, print_epoll_event, 0);
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tprintf(", %d, %d", (int) tcp->u_arg[2], (int) tcp->u_arg[3]);
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}
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}
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SYS_FUNC(epoll_wait)
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{
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epoll_wait_common(tcp);
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return 0;
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}
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SYS_FUNC(epoll_pwait)
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{
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epoll_wait_common(tcp);
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if (exiting(tcp)) {
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tprints(", ");
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/* NB: kernel requires arg[5] == NSIG_BYTES */
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print_sigset_addr_len(tcp, tcp->u_arg[4], tcp->u_arg[5]);
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tprintf(", %" PRI_klu, tcp->u_arg[5]);
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}
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return 0;
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}
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