strace/futex.c

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1.9 KiB
C
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#include "defs.h"
#ifdef HAVE_LINUX_FUTEX_H
# include <linux/futex.h>
#endif
#ifndef FUTEX_PRIVATE_FLAG
# define FUTEX_PRIVATE_FLAG 128
#endif
#ifndef FUTEX_CLOCK_REALTIME
# define FUTEX_CLOCK_REALTIME 256
#endif
#include "xlat/futexops.h"
#include "xlat/futexwakeops.h"
#include "xlat/futexwakecmps.h"
SYS_FUNC(futex)
{
const long uaddr = tcp->u_arg[0];
const int op = tcp->u_arg[1];
const int cmd = op & 127;
const long timeout = tcp->u_arg[3];
const long uaddr2 = tcp->u_arg[4];
const unsigned int val = tcp->u_arg[2];
const unsigned int val2 = tcp->u_arg[3];
const unsigned int val3 = tcp->u_arg[5];
printaddr(uaddr);
tprints(", ");
printxval(futexops, op, "FUTEX_???");
tprintf(", %u", val);
switch (cmd) {
case FUTEX_WAIT:
case FUTEX_LOCK_PI:
tprints(", ");
printtv(tcp, timeout);
break;
case FUTEX_WAIT_BITSET:
tprints(", ");
printtv(tcp, timeout);
tprintf(", %x", val3);
break;
case FUTEX_WAKE_BITSET:
tprintf(", %x", val3);
break;
case FUTEX_REQUEUE:
tprintf(", %u, ", val2);
printaddr(uaddr2);
break;
case FUTEX_CMP_REQUEUE:
case FUTEX_CMP_REQUEUE_PI:
tprintf(", %u, ", val2);
printaddr(uaddr2);
tprintf(", %u", val3);
break;
case FUTEX_WAKE_OP:
tprintf(", %u, ", val2);
printaddr(uaddr2);
tprints(", {");
if ((val3 >> 28) & 8)
tprints("FUTEX_OP_OPARG_SHIFT|");
printxval(futexwakeops, (val3 >> 28) & 0x7, "FUTEX_OP_???");
tprintf(", %u, ", (val3 >> 12) & 0xfff);
if ((val3 >> 24) & 8)
tprints("FUTEX_OP_OPARG_SHIFT|");
printxval(futexwakecmps, (val3 >> 24) & 0x7, "FUTEX_OP_CMP_???");
tprintf(", %u}", val3 & 0xfff);
break;
case FUTEX_WAIT_REQUEUE_PI:
tprints(", ");
printtv(tcp, timeout);
tprints(", ");
printaddr(uaddr2);
break;
case FUTEX_WAKE:
case FUTEX_UNLOCK_PI:
case FUTEX_TRYLOCK_PI:
break;
default:
tprintf(", %lx, %lx, %x", timeout, uaddr2, val3);
break;
}
return RVAL_DECODED;
}