granicus.if.org Git - strace/blob - ipc_msg.c

   1 /*
   2  * Copyright (c) 1993 Ulrich Pegelow <pegelow@moorea.uni-muenster.de>
   3  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
   4  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
   5  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
   6  * Copyright (c) 2003-2006 Roland McGrath <roland@redhat.com>
   7  * Copyright (c) 2006-2015 Dmitry V. Levin <ldv@altlinux.org>
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. The name of the author may not be used to endorse or promote products
  19  *    derived from this software without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include "defs.h"
  34
  35 #include <sys/ipc.h>
  36 #include <sys/msg.h>
  37
  38 #include "xlat/ipc_msg_flags.h"
  39 #include "xlat/resource_flags.h"
  40
  41 extern void tprint_msgbuf(struct tcb *tcp, const long addr, const unsigned long count);
  42
  43 SYS_FUNC(msgget)
  44 {
  45         if (tcp->u_arg[0])
  46                 tprintf("%#lx, ", tcp->u_arg[0]);
  47         else
  48                 tprints("IPC_PRIVATE, ");
  49         if (printflags(resource_flags, tcp->u_arg[1] & ~0777, NULL) != 0)
  50                 tprints("|");
  51         tprintf("%#lo", tcp->u_arg[1] & 0777);
  52         return RVAL_DECODED;
  53 }
  54
  55 static void
  56 tprint_msgsnd(struct tcb *tcp, const long addr, const unsigned long count,
  57               const unsigned long flags)
  58 {
  59         tprint_msgbuf(tcp, addr, count);
  60         printflags(ipc_msg_flags, flags, "MSG_???");
  61 }
  62
  63 SYS_FUNC(msgsnd)
  64 {
  65         tprintf("%d, ", (int) tcp->u_arg[0]);
  66         if (indirect_ipccall(tcp)) {
  67                 tprint_msgsnd(tcp, tcp->u_arg[3], tcp->u_arg[1],
  68                               tcp->u_arg[2]);
  69         } else {
  70                 tprint_msgsnd(tcp, tcp->u_arg[1], tcp->u_arg[2],
  71                               tcp->u_arg[3]);
  72         }
  73         return RVAL_DECODED;
  74 }
  75
  76 static void
  77 tprint_msgrcv(struct tcb *tcp, const long addr, const unsigned long count,
  78               const long msgtyp)
  79 {
  80         tprint_msgbuf(tcp, addr, count);
  81         tprintf("%ld, ", msgtyp);
  82 }
  83
  84 SYS_FUNC(msgrcv)
  85 {
  86         if (entering(tcp)) {
  87                 tprintf("%d, ", (int) tcp->u_arg[0]);
  88         } else {
  89                 if (indirect_ipccall(tcp)) {
  90                         struct ipc_wrapper {
  91                                 struct msgbuf *msgp;
  92                                 long msgtyp;
  93                         } tmp;
  94
  95                         if (umove_or_printaddr(tcp, tcp->u_arg[3], &tmp))
  96                                 tprintf(", %lu, ", tcp->u_arg[1]);
  97                         else
  98                                 tprint_msgrcv(tcp, (long) tmp.msgp,
  99                                         tcp->u_arg[1], tmp.msgtyp);
 100                         printflags(ipc_msg_flags, tcp->u_arg[2], "MSG_???");
 101                 } else {
 102                         tprint_msgrcv(tcp, tcp->u_arg[1],
 103                                 tcp->u_arg[2], tcp->u_arg[3]);
 104                         printflags(ipc_msg_flags, tcp->u_arg[4], "MSG_???");
 105                 }
 106         }
 107         return 0;
 108 }