void
print_timespec(struct tcb *tcp, long addr)
{
char buf[TIMESPEC_TEXT_BUFSIZE];
sprint_timespec(buf, tcp, addr);
tprints(buf);
}
int
sys_recvmmsg(struct tcb *tcp)
{
/* +5 chars are for "left " prefix */
static char str[5 + TIMESPEC_TEXT_BUFSIZE];
if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
if (verbose(tcp)) {
sprint_timespec(str, tcp, tcp->u_arg[4]);
/* Abusing tcp->auxstr as temp storage.
* Will be used and freed on syscall exit.
*/
tcp->auxstr = strdup(str);
} else {
tprintf("%#lx, %ld, ", tcp->u_arg[1], tcp->u_arg[2]);
printflags(msg_flags, tcp->u_arg[3], "MSG_???");
tprints(", ");
print_timespec(tcp, tcp->u_arg[4]);
}
return 0;
} else {
if (verbose(tcp)) {
decode_mmsg(tcp, 0);
/* timeout on entrance */
tprintf(", %s", tcp->auxstr ? tcp->auxstr : "{...}");
free((void *) tcp->auxstr);
tcp->auxstr = NULL;
}
if (syserror(tcp))
return 0;
if (tcp->u_rval == 0) {
tcp->auxstr = "Timeout";
return RVAL_STR;
}
if (!verbose(tcp))
return 0;
/* timeout on exit */
sprint_timespec(stpcpy(str, "left "), tcp, tcp->u_arg[4]);
tcp->auxstr = str;
return RVAL_STR;
}
}
static int
decode_poll_exiting(struct tcb *const tcp, const kernel_ulong_t pts)
{
struct pollfd fds;
const unsigned int nfds = tcp->u_arg[1];
const unsigned long size = sizeof(fds) * nfds;
const kernel_ulong_t start = tcp->u_arg[0];
const kernel_ulong_t end = start + size;
kernel_ulong_t cur;
const unsigned int max_printed =
abbrev(tcp) ? max_strlen : -1U;
unsigned int printed;
static char outstr[1024];
char *outptr;
#define end_outstr (outstr + sizeof(outstr))
if (syserror(tcp))
return 0;
if (tcp->u_rval == 0) {
tcp->auxstr = "Timeout";
return RVAL_STR;
}
if (!verbose(tcp) || !start || !nfds ||
size / sizeof(fds) != nfds || end < start)
return 0;
outptr = outstr;
for (printed = 0, cur = start; cur < end; cur += sizeof(fds)) {
if (umove(tcp, cur, &fds) < 0) {
if (outptr == outstr)
*outptr++ = '[';
else
outptr = stpcpy(outptr, ", ");
outptr += sprintf(outptr, "%#" PRI_klx, cur);
break;
}
if (!fds.revents)
continue;
if (outptr == outstr)
*outptr++ = '[';
else
outptr = stpcpy(outptr, ", ");
if (printed >= max_printed) {
outptr = stpcpy(outptr, "...");
break;
}
static const char fmt[] = "{fd=%d, revents=";
char fdstr[sizeof(fmt) + sizeof(int) * 3];
sprintf(fdstr, fmt, fds.fd);
const char *flagstr = sprintflags("", pollflags,
(unsigned short) fds.revents);
if (outptr + strlen(fdstr) + strlen(flagstr) + 1 >=
end_outstr - (2 + 2 * sizeof(long) + sizeof(", ], ..."))) {
outptr = stpcpy(outptr, "...");
break;
}
outptr = stpcpy(outptr, fdstr);
outptr = stpcpy(outptr, flagstr);
*outptr++ = '}';
++printed;
}
if (outptr != outstr)
*outptr++ = ']';
*outptr = '\0';
if (pts) {
const char *str = sprint_timespec(tcp, pts);
if (outptr + sizeof(", left ") + strlen(str) < end_outstr) {
outptr = stpcpy(outptr, outptr == outstr ? "left " : ", left ");
outptr = stpcpy(outptr, str);
} else {
outptr = stpcpy(outptr, ", ...");
}
}
if (outptr == outstr)
return 0;
tcp->auxstr = outstr;
return RVAL_STR;
#undef end_outstr
}
static int
decode_poll(struct tcb *tcp, long pts)
{
struct pollfd fds;
unsigned nfds;
unsigned long size, start, cur, end, abbrev_end;
int failed = 0;
if (entering(tcp)) {
nfds = tcp->u_arg[1];
size = sizeof(fds) * nfds;
start = tcp->u_arg[0];
end = start + size;
if (nfds == 0 || size / sizeof(fds) != nfds || end < start) {
tprintf("%#lx, %d, ",
tcp->u_arg[0], nfds);
return 0;
}
if (abbrev(tcp)) {
abbrev_end = start + max_strlen * sizeof(fds);
if (abbrev_end < start)
abbrev_end = end;
} else {
abbrev_end = end;
}
tprints("[");
for (cur = start; cur < end; cur += sizeof(fds)) {
if (cur > start)
tprints(", ");
if (cur >= abbrev_end) {
tprints("...");
break;
}
if (umoven(tcp, cur, sizeof fds, (char *) &fds) < 0) {
tprints("?");
failed = 1;
break;
}
if (fds.fd < 0) {
tprintf("{fd=%d}", fds.fd);
continue;
}
tprints("{fd=");
printfd(tcp, fds.fd);
tprints(", events=");
printflags(pollflags, fds.events, "POLL???");
tprints("}");
}
tprints("]");
if (failed)
tprintf(" %#lx", start);
tprintf(", %d, ", nfds);
return 0;
} else {
static char outstr[1024];
char *outptr;
#define end_outstr (outstr + sizeof(outstr))
const char *flagstr;
if (syserror(tcp))
return 0;
if (tcp->u_rval == 0) {
tcp->auxstr = "Timeout";
return RVAL_STR;
}
nfds = tcp->u_arg[1];
size = sizeof(fds) * nfds;
start = tcp->u_arg[0];
end = start + size;
if (nfds == 0 || size / sizeof(fds) != nfds || end < start)
return 0;
if (abbrev(tcp)) {
abbrev_end = start + max_strlen * sizeof(fds);
if (abbrev_end < start)
abbrev_end = end;
} else {
abbrev_end = end;
}
outptr = outstr;
for (cur = start; cur < end; cur += sizeof(fds)) {
if (umoven(tcp, cur, sizeof fds, (char *) &fds) < 0) {
if (outptr < end_outstr - 2)
*outptr++ = '?';
failed = 1;
break;
}
if (!fds.revents)
continue;
if (outptr == outstr) {
*outptr++ = '[';
} else {
if (outptr < end_outstr - 3)
outptr = stpcpy(outptr, ", ");
}
if (cur >= abbrev_end) {
if (outptr < end_outstr - 4)
outptr = stpcpy(outptr, "...");
break;
}
if (outptr < end_outstr - (sizeof("{fd=%d, revents=") + sizeof(int)*3) + 1)
outptr += sprintf(outptr, "{fd=%d, revents=", fds.fd);
flagstr = sprintflags("", pollflags, fds.revents);
if (outptr < end_outstr - (strlen(flagstr) + 2)) {
outptr = stpcpy(outptr, flagstr);
*outptr++ = '}';
}
}
if (failed)
return 0;
if (outptr != outstr /* && outptr < end_outstr - 1 (always true)*/)
*outptr++ = ']';
*outptr = '\0';
if (pts) {
if (outptr < end_outstr - (10 + TIMESPEC_TEXT_BUFSIZE)) {
outptr = stpcpy(outptr, outptr == outstr ? "left " : ", left ");
sprint_timespec(outptr, tcp, pts);
}
}
if (outptr == outstr)
return 0;
tcp->auxstr = outstr;
return RVAL_STR;
#undef end_outstr
}
}