LCOV - code coverage report
Current view: top level - strace - epoll.c (source / functions) Hit Total Coverage
Test: strace-4.18.0.129.97bbb Code Coverage Lines: 41 41 100.0 %
Date: 2017-07-31 03:46:08 Functions: 7 7 100.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 8 8 100.0 %

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * Copyright (c) 2004-2007 Ulrich Drepper <drepper@redhat.com>
       3                 :            :  * Copyright (c) 2004 Roland McGrath <roland@redhat.com>
       4                 :            :  * Copyright (c) 2005-2015 Dmitry V. Levin <ldv@altlinux.org>
       5                 :            :  * Copyright (c) 2015-2017 The strace developers.
       6                 :            :  * All rights reserved.
       7                 :            :  *
       8                 :            :  * Redistribution and use in source and binary forms, with or without
       9                 :            :  * modification, are permitted provided that the following conditions
      10                 :            :  * are met:
      11                 :            :  * 1. Redistributions of source code must retain the above copyright
      12                 :            :  *    notice, this list of conditions and the following disclaimer.
      13                 :            :  * 2. Redistributions in binary form must reproduce the above copyright
      14                 :            :  *    notice, this list of conditions and the following disclaimer in the
      15                 :            :  *    documentation and/or other materials provided with the distribution.
      16                 :            :  * 3. The name of the author may not be used to endorse or promote products
      17                 :            :  *    derived from this software without specific prior written permission.
      18                 :            :  *
      19                 :            :  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
      20                 :            :  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
      21                 :            :  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
      22                 :            :  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
      23                 :            :  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
      24                 :            :  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      25                 :            :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      26                 :            :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      27                 :            :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
      28                 :            :  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      29                 :            :  */
      30                 :            : 
      31                 :            : #include "defs.h"
      32                 :            : #include <fcntl.h>
      33                 :            : #include <sys/epoll.h>
      34                 :            : 
      35                 :          2 : SYS_FUNC(epoll_create)
      36                 :            : {
      37                 :          2 :         tprintf("%d", (int) tcp->u_arg[0]);
      38                 :            : 
      39                 :          2 :         return RVAL_DECODED | RVAL_FD;
      40                 :            : }
      41                 :            : 
      42                 :            : #include "xlat/epollflags.h"
      43                 :            : 
      44                 :          4 : SYS_FUNC(epoll_create1)
      45                 :            : {
      46                 :          4 :         printflags(epollflags, tcp->u_arg[0], "EPOLL_???");
      47                 :            : 
      48                 :          4 :         return RVAL_DECODED | RVAL_FD;
      49                 :            : }
      50                 :            : 
      51                 :            : #include "xlat/epollevents.h"
      52                 :            : 
      53                 :            : static bool
      54                 :          2 : print_epoll_event(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
      55                 :            : {
      56                 :          2 :         const struct epoll_event *ev = elem_buf;
      57                 :            : 
      58                 :          2 :         tprints("{");
      59                 :          2 :         printflags(epollevents, ev->events, "EPOLL???");
      60                 :            :         /* We cannot know what format the program uses, so print u32 and u64
      61                 :            :            which will cover every value.  */
      62                 :          2 :         tprintf(", {u32=%" PRIu32 ", u64=%" PRIu64 "}}",
      63                 :            :                 ev->data.u32, ev->data.u64);
      64                 :            : 
      65                 :          2 :         return true;
      66                 :            : }
      67                 :            : 
      68                 :            : #include "xlat/epollctls.h"
      69                 :            : 
      70                 :          6 : SYS_FUNC(epoll_ctl)
      71                 :            : {
      72                 :          6 :         printfd(tcp, tcp->u_arg[0]);
      73                 :          6 :         tprints(", ");
      74                 :          6 :         const unsigned int op = tcp->u_arg[1];
      75                 :            :         printxval(epollctls, op, "EPOLL_CTL_???");
      76                 :          6 :         tprints(", ");
      77                 :          6 :         printfd(tcp, tcp->u_arg[2]);
      78                 :          6 :         tprints(", ");
      79                 :            :         struct epoll_event ev;
      80         [ +  + ]:          6 :         if (EPOLL_CTL_DEL == op)
      81                 :          2 :                 printaddr(tcp->u_arg[3]);
      82         [ +  + ]:          4 :         else if (!umove_or_printaddr(tcp, tcp->u_arg[3], &ev))
      83                 :          2 :                 print_epoll_event(tcp, &ev, sizeof(ev), 0);
      84                 :            : 
      85                 :          6 :         return RVAL_DECODED;
      86                 :            : }
      87                 :            : 
      88                 :            : static void
      89                 :          8 : epoll_wait_common(struct tcb *tcp)
      90                 :            : {
      91         [ +  + ]:          8 :         if (entering(tcp)) {
      92                 :          4 :                 printfd(tcp, tcp->u_arg[0]);
      93                 :          4 :                 tprints(", ");
      94                 :            :         } else {
      95                 :            :                 struct epoll_event ev;
      96                 :          4 :                 print_array(tcp, tcp->u_arg[1], tcp->u_rval, &ev, sizeof(ev),
      97                 :            :                             umoven_or_printaddr, print_epoll_event, 0);
      98                 :          4 :                 tprintf(", %d, %d", (int) tcp->u_arg[2], (int) tcp->u_arg[3]);
      99                 :            :         }
     100                 :          8 : }
     101                 :            : 
     102                 :          4 : SYS_FUNC(epoll_wait)
     103                 :            : {
     104                 :          4 :         epoll_wait_common(tcp);
     105                 :          4 :         return 0;
     106                 :            : }
     107                 :            : 
     108                 :          4 : SYS_FUNC(epoll_pwait)
     109                 :            : {
     110                 :          4 :         epoll_wait_common(tcp);
     111         [ +  + ]:          4 :         if (exiting(tcp)) {
     112                 :          2 :                 tprints(", ");
     113                 :            :                 /* NB: kernel requires arg[5] == NSIG_BYTES */
     114                 :          2 :                 print_sigset_addr_len(tcp, tcp->u_arg[4], tcp->u_arg[5]);
     115                 :          2 :                 tprintf(", %" PRI_klu, tcp->u_arg[5]);
     116                 :            :         }
     117                 :          4 :         return 0;
     118                 :            : }

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