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

   1 #include "defs.h"
   2
   3 #ifdef HAVE_LINUX_FUTEX_H
   4 # include <linux/futex.h>
   5 #endif
   6
   7 #ifndef FUTEX_PRIVATE_FLAG
   8 # define FUTEX_PRIVATE_FLAG 128
   9 #endif
  10 #ifndef FUTEX_CLOCK_REALTIME
  11 # define FUTEX_CLOCK_REALTIME 256
  12 #endif
  13
  14 #include "xlat/futexops.h"
  15 #include "xlat/futexwakeops.h"
  16 #include "xlat/futexwakecmps.h"
  17
  18 SYS_FUNC(futex)
  19 {
  20         const long uaddr = tcp->u_arg[0];
  21         const int op = tcp->u_arg[1];
  22         const int cmd = op & 127;
  23         const long timeout = tcp->u_arg[3];
  24         const long uaddr2 = tcp->u_arg[4];
  25         const unsigned int val = tcp->u_arg[2];
  26         const unsigned int val2 = tcp->u_arg[3];
  27         const unsigned int val3 = tcp->u_arg[5];
  28
  29         printaddr(uaddr);
  30         tprints(", ");
  31         printxval(futexops, op, "FUTEX_???");
  32         tprintf(", %u", val);
  33         switch (cmd) {
  34         case FUTEX_WAIT:
  35         case FUTEX_LOCK_PI:
  36                 tprints(", ");
  37                 print_timespec(tcp, timeout);
  38                 break;
  39         case FUTEX_WAIT_BITSET:
  40                 tprints(", ");
  41                 print_timespec(tcp, timeout);
  42                 tprintf(", %x", val3);
  43                 break;
  44         case FUTEX_WAKE_BITSET:
  45                 tprintf(", %x", val3);
  46                 break;
  47         case FUTEX_REQUEUE:
  48                 tprintf(", %u, ", val2);
  49                 printaddr(uaddr2);
  50                 break;
  51         case FUTEX_CMP_REQUEUE:
  52         case FUTEX_CMP_REQUEUE_PI:
  53                 tprintf(", %u, ", val2);
  54                 printaddr(uaddr2);
  55                 tprintf(", %u", val3);
  56                 break;
  57         case FUTEX_WAKE_OP:
  58                 tprintf(", %u, ", val2);
  59                 printaddr(uaddr2);
  60                 tprints(", {");
  61                 if ((val3 >> 28) & 8)
  62                         tprints("FUTEX_OP_OPARG_SHIFT|");
  63                 printxval(futexwakeops, (val3 >> 28) & 0x7, "FUTEX_OP_???");
  64                 tprintf(", %u, ", (val3 >> 12) & 0xfff);
  65                 if ((val3 >> 24) & 8)
  66                         tprints("FUTEX_OP_OPARG_SHIFT|");
  67                 printxval(futexwakecmps, (val3 >> 24) & 0x7, "FUTEX_OP_CMP_???");
  68                 tprintf(", %u}", val3 & 0xfff);
  69                 break;
  70         case FUTEX_WAIT_REQUEUE_PI:
  71                 tprints(", ");
  72                 print_timespec(tcp, timeout);
  73                 tprints(", ");
  74                 printaddr(uaddr2);
  75                 break;
  76         case FUTEX_WAKE:
  77         case FUTEX_UNLOCK_PI:
  78         case FUTEX_TRYLOCK_PI:
  79                 break;
  80         default:
  81                 tprintf(", %lx, %lx, %x", timeout, uaddr2, val3);
  82                 break;
  83         }
  84
  85         return RVAL_DECODED;
  86 }