LCOV - code coverage report
Current view: top level - strace - ipc_msg.c (source / functions) Hit Total Coverage
Test: strace-4.18.0.129.97bbb Code Coverage Lines: 43 46 93.5 %
Date: 2017-07-31 03:46:08 Functions: 6 6 100.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 15 20 75.0 %

           Branch data     Line data    Source code
       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                 :            :  * Copyright (c) 2015-2017 The strace developers.
       9                 :            :  * All rights reserved.
      10                 :            :  *
      11                 :            :  * Redistribution and use in source and binary forms, with or without
      12                 :            :  * modification, are permitted provided that the following conditions
      13                 :            :  * are met:
      14                 :            :  * 1. Redistributions of source code must retain the above copyright
      15                 :            :  *    notice, this list of conditions and the following disclaimer.
      16                 :            :  * 2. Redistributions in binary form must reproduce the above copyright
      17                 :            :  *    notice, this list of conditions and the following disclaimer in the
      18                 :            :  *    documentation and/or other materials provided with the distribution.
      19                 :            :  * 3. The name of the author may not be used to endorse or promote products
      20                 :            :  *    derived from this software without specific prior written permission.
      21                 :            :  *
      22                 :            :  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
      23                 :            :  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
      24                 :            :  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
      25                 :            :  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
      26                 :            :  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
      27                 :            :  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      28                 :            :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      29                 :            :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      30                 :            :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
      31                 :            :  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      32                 :            :  */
      33                 :            : 
      34                 :            : #include "defs.h"
      35                 :            : #include "ipc_defs.h"
      36                 :            : 
      37                 :            : #ifdef HAVE_SYS_MSG_H
      38                 :            : # include <sys/msg.h>
      39                 :            : #elif defined HAVE_LINUX_MSG_H
      40                 :            : # include <linux/msg.h>
      41                 :            : #endif
      42                 :            : 
      43                 :            : #include "xlat/ipc_msg_flags.h"
      44                 :            : #include "xlat/resource_flags.h"
      45                 :            : 
      46                 :          6 : SYS_FUNC(msgget)
      47                 :            : {
      48                 :          6 :         const int key = (int) tcp->u_arg[0];
      49         [ +  + ]:          6 :         if (key)
      50                 :          2 :                 tprintf("%#x", key);
      51                 :            :         else
      52                 :          4 :                 tprints("IPC_PRIVATE");
      53                 :          6 :         tprints(", ");
      54         [ +  + ]:          6 :         if (printflags(resource_flags, tcp->u_arg[1] & ~0777, NULL) != 0)
      55                 :          4 :                 tprints("|");
      56                 :          6 :         print_numeric_umode_t(tcp->u_arg[1] & 0777);
      57                 :          6 :         return RVAL_DECODED;
      58                 :            : }
      59                 :            : 
      60                 :            : static void
      61                 :          2 : tprint_msgsnd(struct tcb *const tcp, const kernel_ulong_t addr,
      62                 :            :               const kernel_ulong_t count, const unsigned int flags)
      63                 :            : {
      64                 :          2 :         tprint_msgbuf(tcp, addr, count);
      65                 :            :         printflags(ipc_msg_flags, flags, "MSG_???");
      66                 :          2 : }
      67                 :            : 
      68                 :          2 : SYS_FUNC(msgsnd)
      69                 :            : {
      70                 :          2 :         tprintf("%d, ", (int) tcp->u_arg[0]);
      71         [ +  + ]:          2 :         if (indirect_ipccall(tcp)) {
      72                 :          1 :                 tprint_msgsnd(tcp, tcp->u_arg[3], tcp->u_arg[1],
      73                 :          1 :                               tcp->u_arg[2]);
      74                 :            :         } else {
      75                 :          1 :                 tprint_msgsnd(tcp, tcp->u_arg[1], tcp->u_arg[2],
      76                 :          1 :                               tcp->u_arg[3]);
      77                 :            :         }
      78                 :          2 :         return RVAL_DECODED;
      79                 :            : }
      80                 :            : 
      81                 :            : static void
      82                 :          3 : tprint_msgrcv(struct tcb *const tcp, const kernel_ulong_t addr,
      83                 :            :               const kernel_ulong_t count, const kernel_ulong_t msgtyp)
      84                 :            : {
      85                 :          3 :         tprint_msgbuf(tcp, addr, count);
      86                 :          3 :         tprintf("%" PRI_kld ", ", msgtyp);
      87                 :          3 : }
      88                 :            : 
      89                 :            : static int
      90                 :          1 : fetch_msgrcv_args(struct tcb *const tcp, const kernel_ulong_t addr,
      91                 :            :                   kernel_ulong_t *const pair)
      92                 :            : {
      93         [ -  + ]:          1 :         if (current_wordsize == sizeof(*pair)) {
      94         [ #  # ]:          0 :                 if (umoven_or_printaddr(tcp, addr, 2 * sizeof(*pair), pair))
      95                 :            :                         return -1;
      96                 :            :         } else {
      97                 :            :                 unsigned int tmp[2];
      98                 :            : 
      99         [ -  + ]:          1 :                 if (umove_or_printaddr(tcp, addr, &tmp))
     100                 :          0 :                         return -1;
     101                 :          1 :                 pair[0] = tmp[0];
     102                 :          1 :                 pair[1] = tmp[1];
     103                 :            :         }
     104                 :            :         return 0;
     105                 :            : }
     106                 :            : 
     107                 :          6 : SYS_FUNC(msgrcv)
     108                 :            : {
     109         [ +  + ]:          6 :         if (entering(tcp)) {
     110                 :          3 :                 tprintf("%d, ", (int) tcp->u_arg[0]);
     111                 :            :         } else {
     112         [ +  + ]:          3 :                 if (indirect_ipccall(tcp)) {
     113                 :          2 :                         const bool direct =
     114                 :            : #ifdef SPARC64
     115                 :            :                                 current_wordsize == 8 ||
     116                 :            : #endif
     117                 :            :                                 get_tcb_priv_ulong(tcp) != 0;
     118         [ +  + ]:          2 :                         if (direct) {
     119                 :          1 :                                 tprint_msgrcv(tcp, tcp->u_arg[3],
     120                 :            :                                               tcp->u_arg[1], tcp->u_arg[4]);
     121                 :            :                         } else {
     122                 :            :                                 kernel_ulong_t pair[2];
     123                 :            : 
     124         [ -  + ]:          1 :                                 if (fetch_msgrcv_args(tcp, tcp->u_arg[3], pair))
     125                 :          0 :                                         tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
     126                 :            :                                 else
     127                 :          1 :                                         tprint_msgrcv(tcp, pair[0],
     128                 :            :                                                       tcp->u_arg[1], pair[1]);
     129                 :            :                         }
     130                 :          2 :                         printflags(ipc_msg_flags, tcp->u_arg[2], "MSG_???");
     131                 :            :                 } else {
     132                 :          1 :                         tprint_msgrcv(tcp, tcp->u_arg[1],
     133                 :            :                                 tcp->u_arg[2], tcp->u_arg[3]);
     134                 :          1 :                         printflags(ipc_msg_flags, tcp->u_arg[4], "MSG_???");
     135                 :            :                 }
     136                 :            :         }
     137                 :          6 :         return 0;
     138                 :            : }

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