Expand the decoding of kevent structures.
- Print the ident value as decimal instead of hexadecimal for filter types that use "small" values such as file descriptors and PIDs. - Decode NOTE_* flags in the fflags field of kevents for several system filter types.
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c915ff0349
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=286914
@ -397,6 +397,30 @@ static struct xlat kevent_flags[] = {
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X(EV_DROP) X(EV_FLAG1) X(EV_ERROR) X(EV_EOF) XEND
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};
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static struct xlat kevent_user_ffctrl[] = {
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X(NOTE_FFNOP) X(NOTE_FFAND) X(NOTE_FFOR) X(NOTE_FFCOPY)
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XEND
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};
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static struct xlat kevent_rdwr_fflags[] = {
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X(NOTE_LOWAT) X(NOTE_FILE_POLL) XEND
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};
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static struct xlat kevent_vnode_fflags[] = {
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X(NOTE_DELETE) X(NOTE_WRITE) X(NOTE_EXTEND) X(NOTE_ATTRIB)
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X(NOTE_LINK) X(NOTE_RENAME) X(NOTE_REVOKE) XEND
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};
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static struct xlat kevent_proc_fflags[] = {
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X(NOTE_EXIT) X(NOTE_FORK) X(NOTE_EXEC) X(NOTE_TRACK) X(NOTE_TRACKERR)
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X(NOTE_CHILD) XEND
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};
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static struct xlat kevent_timer_fflags[] = {
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X(NOTE_SECONDS) X(NOTE_MSECONDS) X(NOTE_USECONDS) X(NOTE_NSECONDS)
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XEND
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};
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static struct xlat poll_flags[] = {
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X(POLLSTANDARD) X(POLLIN) X(POLLPRI) X(POLLOUT) X(POLLERR)
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X(POLLHUP) X(POLLNVAL) X(POLLRDNORM) X(POLLRDBAND)
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@ -742,6 +766,64 @@ strsig2(int sig)
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return (ret);
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}
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static void
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print_kevent(FILE *fp, struct kevent *ke, int input)
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{
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switch (ke->filter) {
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case EVFILT_READ:
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case EVFILT_WRITE:
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case EVFILT_VNODE:
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case EVFILT_PROC:
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case EVFILT_TIMER:
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case EVFILT_PROCDESC:
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fprintf(fp, "%ju", (uintmax_t)ke->ident);
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break;
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case EVFILT_SIGNAL:
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fputs(strsig2(ke->ident), fp);
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break;
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default:
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fprintf(fp, "%p", (void *)ke->ident);
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}
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fprintf(fp, ",%s,%s,", xlookup(kevent_filters, ke->filter),
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xlookup_bits(kevent_flags, ke->flags));
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switch (ke->filter) {
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case EVFILT_READ:
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case EVFILT_WRITE:
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fputs(xlookup_bits(kevent_rdwr_fflags, ke->fflags), fp);
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break;
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case EVFILT_VNODE:
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fputs(xlookup_bits(kevent_vnode_fflags, ke->fflags), fp);
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break;
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case EVFILT_PROC:
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case EVFILT_PROCDESC:
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fputs(xlookup_bits(kevent_proc_fflags, ke->fflags), fp);
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break;
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case EVFILT_TIMER:
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fputs(xlookup_bits(kevent_timer_fflags, ke->fflags), fp);
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break;
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case EVFILT_USER: {
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int ctrl, data;
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ctrl = ke->fflags & NOTE_FFCTRLMASK;
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data = ke->fflags & NOTE_FFLAGSMASK;
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if (input) {
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fputs(xlookup(kevent_user_ffctrl, ctrl), fp);
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if (ke->fflags & NOTE_TRIGGER)
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fputs("|NOTE_TRIGGER", fp);
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if (data != 0)
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fprintf(fp, "|%#x", data);
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} else {
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fprintf(fp, "%#x", data);
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}
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break;
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}
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default:
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fprintf(fp, "%#x", ke->fflags);
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}
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fprintf(fp, ",%p,%p", (void *)ke->data, (void *)ke->udata);
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}
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/*
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* print_arg
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* Converts a syscall argument into a string. Said string is
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@ -1281,14 +1363,10 @@ print_arg(struct syscall_args *sc, unsigned long *args, long retval,
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if (numevents >= 0 && get_struct(pid, (void *)args[sc->offset],
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ke, bytes) != -1) {
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fputc('{', fp);
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for (i = 0; i < numevents; i++)
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fprintf(fp, " %p,%s,%s,%d,%p,%p",
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(void *)ke[i].ident,
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xlookup(kevent_filters, ke[i].filter),
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xlookup_bits(kevent_flags, ke[i].flags),
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ke[i].fflags,
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(void *)ke[i].data,
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(void *)ke[i].udata);
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for (i = 0; i < numevents; i++) {
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fputc(' ', fp);
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print_kevent(fp, &ke[i], sc->offset == 1);
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}
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fputs(" }", fp);
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} else {
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fprintf(fp, "0x%lx", args[sc->offset]);
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