LCOV - code coverage report
Current view: top level - strace_git - ipc_msg.c (source / functions) Hit Total Coverage
Test: strace-4.16.0.69.f1ea-dirty Code Coverage Lines: 46 50 92.0 %
Date: 2017-03-18 00:38:52 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                 :            :  * 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                 :            : #include "ipc_defs.h"
      35                 :            : 
      36                 :            : #ifdef HAVE_SYS_MSG_H
      37                 :            : # include <sys/msg.h>
      38                 :            : #elif defined HAVE_LINUX_MSG_H
      39                 :            : # include <linux/msg.h>
      40                 :            : #endif
      41                 :            : 
      42                 :            : #include "xlat/ipc_msg_flags.h"
      43                 :            : #include "xlat/resource_flags.h"
      44                 :            : 
      45                 :         18 : SYS_FUNC(msgget)
      46                 :            : {
      47                 :         18 :         const int key = (int) tcp->u_arg[0];
      48         [ +  + ]:         18 :         if (key)
      49                 :          6 :                 tprintf("%#x", key);
      50                 :            :         else
      51                 :         12 :                 tprints("IPC_PRIVATE");
      52                 :         18 :         tprints(", ");
      53         [ +  + ]:         18 :         if (printflags(resource_flags, tcp->u_arg[1] & ~0777, NULL) != 0)
      54                 :         12 :                 tprints("|");
      55                 :         18 :         print_numeric_umode_t(tcp->u_arg[1] & 0777);
      56                 :         18 :         return RVAL_DECODED;
      57                 :            : }
      58                 :            : 
      59                 :            : static void
      60                 :          6 : tprint_msgsnd(struct tcb *const tcp, const kernel_ulong_t addr,
      61                 :            :               const kernel_ulong_t count, const unsigned int flags)
      62                 :            : {
      63                 :          6 :         tprint_msgbuf(tcp, addr, count);
      64                 :          6 :         printflags(ipc_msg_flags, flags, "MSG_???");
      65                 :          6 : }
      66                 :            : 
      67                 :          6 : SYS_FUNC(msgsnd)
      68                 :            : {
      69                 :          6 :         tprintf("%d, ", (int) tcp->u_arg[0]);
      70         [ +  + ]:          6 :         if (indirect_ipccall(tcp)) {
      71                 :          1 :                 tprint_msgsnd(tcp, tcp->u_arg[3], tcp->u_arg[1],
      72                 :          1 :                               tcp->u_arg[2]);
      73                 :            :         } else {
      74                 :          5 :                 tprint_msgsnd(tcp, tcp->u_arg[1], tcp->u_arg[2],
      75                 :          5 :                               tcp->u_arg[3]);
      76                 :            :         }
      77                 :          6 :         return RVAL_DECODED;
      78                 :            : }
      79                 :            : 
      80                 :            : static void
      81                 :          7 : tprint_msgrcv(struct tcb *const tcp, const kernel_ulong_t addr,
      82                 :            :               const kernel_ulong_t count, const kernel_ulong_t msgtyp)
      83                 :            : {
      84                 :          7 :         tprint_msgbuf(tcp, addr, count);
      85                 :          7 :         tprintf("%" PRI_kld ", ", msgtyp);
      86                 :          7 : }
      87                 :            : 
      88                 :            : static int
      89                 :          1 : fetch_msgrcv_args(struct tcb *const tcp, const kernel_ulong_t addr,
      90                 :            :                   kernel_ulong_t *const pair)
      91                 :            : {
      92         [ -  + ]:          1 :         if (current_wordsize == sizeof(*pair)) {
      93         [ #  # ]:          0 :                 if (umoven_or_printaddr(tcp, addr, 2 * sizeof(*pair), pair))
      94                 :          0 :                         return -1;
      95                 :            :         } else {
      96                 :            :                 unsigned int tmp[2];
      97                 :            : 
      98         [ -  + ]:          1 :                 if (umove_or_printaddr(tcp, addr, &tmp))
      99                 :          0 :                         return -1;
     100                 :          1 :                 pair[0] = tmp[0];
     101                 :          1 :                 pair[1] = tmp[1];
     102                 :            :         }
     103                 :          1 :         return 0;
     104                 :            : }
     105                 :            : 
     106                 :         14 : SYS_FUNC(msgrcv)
     107                 :            : {
     108         [ +  + ]:         14 :         if (entering(tcp)) {
     109                 :          7 :                 tprintf("%d, ", (int) tcp->u_arg[0]);
     110                 :            :         } else {
     111         [ +  + ]:          7 :                 if (indirect_ipccall(tcp)) {
     112                 :          2 :                         const bool direct =
     113                 :            : #ifdef SPARC64
     114                 :            :                                 current_wordsize == 8 ||
     115                 :            : #endif
     116                 :          2 :                                 get_tcb_priv_ulong(tcp) != 0;
     117         [ +  + ]:          2 :                         if (direct) {
     118                 :          1 :                                 tprint_msgrcv(tcp, tcp->u_arg[3],
     119                 :            :                                               tcp->u_arg[1], tcp->u_arg[4]);
     120                 :            :                         } else {
     121                 :            :                                 kernel_ulong_t pair[2];
     122                 :            : 
     123         [ -  + ]:          1 :                                 if (fetch_msgrcv_args(tcp, tcp->u_arg[3], pair))
     124                 :          0 :                                         tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
     125                 :            :                                 else
     126                 :          1 :                                         tprint_msgrcv(tcp, pair[0],
     127                 :            :                                                       tcp->u_arg[1], pair[1]);
     128                 :            :                         }
     129                 :          2 :                         printflags(ipc_msg_flags, tcp->u_arg[2], "MSG_???");
     130                 :            :                 } else {
     131                 :          5 :                         tprint_msgrcv(tcp, tcp->u_arg[1],
     132                 :            :                                 tcp->u_arg[2], tcp->u_arg[3]);
     133                 :          5 :                         printflags(ipc_msg_flags, tcp->u_arg[4], "MSG_???");
     134                 :            :                 }
     135                 :            :         }
     136                 :         14 :         return 0;
     137                 :            : }

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