unix: identify unexpected events that fired in TestPoll
Currently if TestPoll fails because an unexpected event fired, we just
print that it happened, not which one fired. #49380 has been difficult
to reproduce, so printing more information for this case would be
helpful.
Updates #49380.
Change-Id: I820c4b634536565487ee1474f8afe092a8a4443b
Reviewed-on: https://go-review.googlesource.com/c/sys/+/363714
Trust: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Michael Anthony Knyszek authored 2 years ago
Michael Knyszek committed 2 years ago
| 519 | 519 | } |
| 520 | 520 | if n != 0 { |
| 521 | 521 | t.Errorf("Poll: wrong number of events: got %v, expected %v", n, 0) |
| 522 | ||
| 523 | // Identify which event(s) caused Poll to return. | |
| 524 | for _, ev := range []struct { | |
| 525 | name string | |
| 526 | bits int16 | |
| 527 | }{ | |
| 528 | {"POLLIN", unix.POLLIN}, | |
| 529 | {"POLLPRI", unix.POLLPRI}, | |
| 530 | {"POLLOUT", unix.POLLOUT}, | |
| 531 | {"POLLERR", unix.POLLERR}, | |
| 532 | {"POLLHUP", unix.POLLHUP}, | |
| 533 | {"POLLNVAL", unix.POLLNVAL}, | |
| 534 | } { | |
| 535 | if fds[0].Revents&ev.bits != 0 { | |
| 536 | t.Logf("Poll: found event %s", ev.name) | |
| 537 | } | |
| 538 | } | |
| 522 | 539 | } |
| 523 | 540 | break |
| 524 | 541 | } |