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         if (entering(tcp)) {
  21                 long int cmd = tcp->u_arg[1] & 127;
  22                 tprintf("%p, ", (void *) tcp->u_arg[0]);
  23                 printxval(futexops, tcp->u_arg[1], "FUTEX_???");
  24                 tprintf(", %ld", tcp->u_arg[2]);
  25                 if (cmd == FUTEX_WAKE_BITSET)
  26                         tprintf(", %lx", tcp->u_arg[5]);
  27                 else if (cmd == FUTEX_WAIT) {
  28                         tprints(", ");
  29                         printtv(tcp, tcp->u_arg[3]);
  30                 } else if (cmd == FUTEX_WAIT_BITSET) {
  31                         tprints(", ");
  32                         printtv(tcp, tcp->u_arg[3]);
  33                         tprintf(", %lx", tcp->u_arg[5]);
  34                 } else if (cmd == FUTEX_REQUEUE)
  35                         tprintf(", %ld, %p", tcp->u_arg[3], (void *) tcp->u_arg[4]);
  36                 else if (cmd == FUTEX_CMP_REQUEUE || cmd == FUTEX_CMP_REQUEUE_PI)
  37                         tprintf(", %ld, %p, %ld", tcp->u_arg[3], (void *) tcp->u_arg[4], tcp->u_arg[5]);
  38                 else if (cmd == FUTEX_WAKE_OP) {
  39                         tprintf(", %ld, %p, {", tcp->u_arg[3], (void *) tcp->u_arg[4]);
  40                         if ((tcp->u_arg[5] >> 28) & 8)
  41                                 tprints("FUTEX_OP_OPARG_SHIFT|");
  42                         printxval(futexwakeops, (tcp->u_arg[5] >> 28) & 0x7, "FUTEX_OP_???");
  43                         tprintf(", %ld, ", (tcp->u_arg[5] >> 12) & 0xfff);
  44                         if ((tcp->u_arg[5] >> 24) & 8)
  45                                 tprints("FUTEX_OP_OPARG_SHIFT|");
  46                         printxval(futexwakecmps, (tcp->u_arg[5] >> 24) & 0x7, "FUTEX_OP_CMP_???");
  47                         tprintf(", %ld}", tcp->u_arg[5] & 0xfff);
  48                 } else if (cmd == FUTEX_WAIT_REQUEUE_PI) {
  49                         tprints(", ");
  50                         printtv(tcp, tcp->u_arg[3]);
  51                         tprintf(", %p", (void *) tcp->u_arg[4]);
  52                 }
  53         }
  54         return 0;
  55 }