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/*
* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2015-2017 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 "print_fields.h"
#include "xlat/kcmp_types.h"
struct strace_kcmp_epoll_slot {
uint32_t efd;
uint32_t tfd;
uint32_t toff;
};
static void
printpidfd(struct tcb *tcp, pid_t pid, int fd)
{
/*
* XXX We want to use printfd here, but we should figure out which
* process in strace's PID NS is referred to first.
*/
tprintf("%d", fd);
}
#define PRINT_FIELD_PIDFD(prefix_, where_, field_, tcp_, pid_) \
do { \
STRACE_PRINTF("%s%s=", (prefix_), #field_); \
printpidfd((tcp_), (pid_), (where_).field_); \
} while (0)
SYS_FUNC(kcmp)
{
pid_t pid1 = tcp->u_arg[0];
pid_t pid2 = tcp->u_arg[1];
int type = tcp->u_arg[2];
kernel_ulong_t idx1 = tcp->u_arg[3];
kernel_ulong_t idx2 = tcp->u_arg[4];
tprintf("%d, %d, ", pid1, pid2);
printxval(kcmp_types, type, "KCMP_???");
switch (type) {
case KCMP_FILE:
tprints(", ");
printpidfd(tcp, pid1, idx1);
tprints(", ");
printpidfd(tcp, pid1, idx2);
break;
case KCMP_EPOLL_TFD: {
struct strace_kcmp_epoll_slot slot;
tprints(", ");
printpidfd(tcp, pid1, idx1);
tprints(", ");
if (umove_or_printaddr(tcp, idx2, &slot))
break;
PRINT_FIELD_PIDFD("{", slot, efd, tcp, pid2);
PRINT_FIELD_PIDFD(", ", slot, tfd, tcp, pid2);
PRINT_FIELD_U(", ", slot, toff);
tprints("}");
break;
}
case KCMP_FILES:
case KCMP_FS:
case KCMP_IO:
case KCMP_SIGHAND:
case KCMP_SYSVSEM:
case KCMP_VM:
break;
default:
tprintf(", %#" PRI_klx ", %#" PRI_klx, idx1, idx2);
}
return RVAL_DECODED;
}
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