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

   1 /*
   2  * Copyright (c) 2003, 2004 Ulrich Drepper <drepper@redhat.com>
   3  * Copyright (c) 2005-2015 Dmitry V. Levin <ldv@altlinux.org>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include "defs.h"
  30
  31 #include <signal.h>
  32
  33 #include "xlat/sigev_value.h"
  34
  35 #if SUPPORTED_PERSONALITIES > 1
  36 static void
  37 printsigevent32(struct tcb *tcp, long arg)
  38 {
  39         struct {
  40                 int     sigev_value;
  41                 int     sigev_signo;
  42                 int     sigev_notify;
  43
  44                 union {
  45                         int     tid;
  46                         struct {
  47                                 int     function, attribute;
  48                         } thread;
  49                 } un;
  50         } sev;
  51
  52         if (!umove_or_printaddr(tcp, arg, &sev)) {
  53                 tprintf("{%#x, ", sev.sigev_value);
  54                 if (sev.sigev_notify == SIGEV_SIGNAL)
  55                         tprintf("%s, ", signame(sev.sigev_signo));
  56                 else
  57                         tprintf("%u, ", sev.sigev_signo);
  58                 printxval(sigev_value, sev.sigev_notify, "SIGEV_???");
  59                 tprints(", ");
  60                 if (sev.sigev_notify == SIGEV_THREAD_ID)
  61                         tprintf("{%d}", sev.un.tid);
  62                 else if (sev.sigev_notify == SIGEV_THREAD)
  63                         tprintf("{%#x, %#x}",
  64                                 sev.un.thread.function,
  65                                 sev.un.thread.attribute);
  66                 else
  67                         tprints("{...}");
  68                 tprints("}");
  69         }
  70 }
  71 #endif
  72
  73 void
  74 printsigevent(struct tcb *tcp, long arg)
  75 {
  76         struct sigevent sev;
  77
  78 #if SUPPORTED_PERSONALITIES > 1
  79         if (current_wordsize == 4) {
  80                 printsigevent32(tcp, arg);
  81                 return;
  82         }
  83 #endif
  84         if (!umove_or_printaddr(tcp, arg, &sev)) {
  85                 tprintf("{%p, ", sev.sigev_value.sival_ptr);
  86                 if (sev.sigev_notify == SIGEV_SIGNAL)
  87                         tprintf("%s, ", signame(sev.sigev_signo));
  88                 else
  89                         tprintf("%u, ", sev.sigev_signo);
  90                 printxval(sigev_value, sev.sigev_notify, "SIGEV_???");
  91                 tprints(", ");
  92                 if (sev.sigev_notify == SIGEV_THREAD_ID)
  93 #if defined(HAVE_STRUCT_SIGEVENT__SIGEV_UN__PAD)
  94                         /* _pad[0] is the _tid field which might not be
  95                            present in the userlevel definition of the
  96                            struct.  */
  97                         tprintf("{%d}", sev._sigev_un._pad[0]);
  98 #elif defined(HAVE_STRUCT_SIGEVENT___PAD)
  99                         tprintf("{%d}", sev.__pad[0]);
 100 #else
 101 # warning unfamiliar struct sigevent => incomplete SIGEV_THREAD_ID decoding
 102                         tprints("{...}");
 103 #endif
 104                 else if (sev.sigev_notify == SIGEV_THREAD)
 105                         tprintf("{%p, %p}", sev.sigev_notify_function,
 106                                 sev.sigev_notify_attributes);
 107                 else
 108                         tprints("{...}");
 109                 tprints("}");
 110         }
 111 }