LCOV - code coverage report
Current view: top level - strace - ipc_shmctl.c (source / functions) Hit Total Coverage
Test: strace-4.18.0.129.97bbb Code Coverage Lines: 37 37 100.0 %
Date: 2017-07-31 03:46:08 Functions: 3 4 75.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 14 14 100.0 %

           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                 :            : 
      36                 :            : #include DEF_MPERS_TYPE(shmid_ds_t)
      37                 :            : 
      38                 :            : #include "ipc_defs.h"
      39                 :            : 
      40                 :            : #ifdef HAVE_SYS_SHM_H
      41                 :            : /* The C library generally exports the struct the current kernel expects. */
      42                 :            : # include <sys/shm.h>
      43                 :            : typedef struct shmid_ds shmid_ds_t;
      44                 :            : #elif defined HAVE_LINUX_SHM_H
      45                 :            : /* The linux header might provide the right struct. */
      46                 :            : # include <linux/shm.h>
      47                 :            : typedef struct shmid64_ds shmid_ds_t;
      48                 :            : #endif
      49                 :            : 
      50                 :            : #include MPERS_DEFS
      51                 :            : 
      52                 :            : #include "xlat/shmctl_flags.h"
      53                 :            : 
      54                 :            : static void
      55                 :         14 : print_shmid_ds(struct tcb *const tcp, const kernel_ulong_t addr, int cmd)
      56                 :            : {
      57                 :            :         /* TODO: We don't properly decode old compat ipc calls. */
      58         [ +  + ]:         14 :         if (cmd & IPC_64)
      59                 :          7 :                 cmd &= ~IPC_64;
      60                 :            :         shmid_ds_t shmid_ds;
      61         [ +  + ]:         14 :         switch (cmd) {
      62                 :            :         case IPC_SET:
      63                 :            :         case IPC_STAT:
      64         [ +  + ]:          6 :                 if (umove_or_printaddr(tcp, addr, &shmid_ds))
      65                 :          2 :                         return;
      66                 :            : 
      67                 :          4 :                 tprints("{shm_perm={");
      68                 :          4 :                 printuid("uid=", shmid_ds.shm_perm.uid);
      69                 :          4 :                 printuid(", gid=", shmid_ds.shm_perm.gid);
      70                 :          4 :                 tprints(", mode=");
      71                 :          4 :                 print_numeric_umode_t(shmid_ds.shm_perm.mode);
      72                 :            : 
      73         [ +  + ]:          4 :                 if (cmd != IPC_STAT) {
      74                 :          2 :                         tprints("}, ...}");
      75                 :          2 :                         break;
      76                 :            :                 }
      77                 :            : 
      78                 :          2 :                 tprintf(", key=%u", (unsigned) shmid_ds.shm_perm.__key);
      79                 :          2 :                 printuid(", cuid=", shmid_ds.shm_perm.cuid);
      80                 :          2 :                 printuid(", cgid=", shmid_ds.shm_perm.cgid);
      81                 :          2 :                 tprints("}");
      82                 :          2 :                 tprintf(", shm_segsz=%u", (unsigned) shmid_ds.shm_segsz);
      83                 :          2 :                 tprintf(", shm_cpid=%u", (unsigned) shmid_ds.shm_cpid);
      84                 :          2 :                 tprintf(", shm_lpid=%u", (unsigned) shmid_ds.shm_lpid);
      85                 :          2 :                 tprintf(", shm_nattch=%u", (unsigned) shmid_ds.shm_nattch);
      86                 :          2 :                 tprintf(", shm_atime=%u", (unsigned) shmid_ds.shm_atime);
      87                 :          2 :                 tprintf(", shm_dtime=%u", (unsigned) shmid_ds.shm_dtime);
      88                 :          2 :                 tprintf(", shm_ctime=%u", (unsigned) shmid_ds.shm_ctime);
      89                 :          2 :                 tprints("}");
      90                 :          2 :                 break;
      91                 :            : 
      92                 :            :         default:
      93                 :          8 :                 printaddr(addr);
      94                 :         12 :                 break;
      95                 :            :         }
      96                 :            : }
      97                 :            : 
      98                 :         28 : SYS_FUNC(shmctl)
      99                 :            : {
     100         [ +  + ]:         28 :         if (entering(tcp)) {
     101                 :         14 :                 tprintf("%d, ", (int) tcp->u_arg[0]);
     102         [ +  + ]:         14 :                 PRINTCTL(shmctl_flags, tcp->u_arg[1], "SHM_???");
     103                 :         14 :                 tprints(", ");
     104                 :            :         } else {
     105         [ +  + ]:         14 :                 const kernel_ulong_t addr = tcp->u_arg[indirect_ipccall(tcp) ? 3 : 2];
     106                 :         14 :                 print_shmid_ds(tcp, addr, tcp->u_arg[1]);
     107                 :            :         }
     108                 :         28 :         return 0;
     109                 :            : }

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