diff options
Diffstat (limited to 'tools/perf/tests/fdarray.c')
| -rw-r--r-- | tools/perf/tests/fdarray.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tools/perf/tests/fdarray.c b/tools/perf/tests/fdarray.c index 40983c3574b1..23860edb8ef0 100644 --- a/tools/perf/tests/fdarray.c +++ b/tools/perf/tests/fdarray.c @@ -80,6 +80,38 @@ static int test__fdarray__filter(struct test_suite *test __maybe_unused, int sub goto out_delete; } + fdarray__init_revents(fda, POLLHUP); + fda->priv[2].flags = fdarray_flag__nonfilterable; + + pr_debug("\nfiltering all but fda->entries[2] (nonfilterable):"); + fdarray__fprintf_prefix(fda, "before", stderr); + + /* + * Note: fdarray__filter() in tools/lib/api/fd/array.c evaluates the + * fdarray_flag__nonfilterable flag at the very top of its loop via an + * early continue. Therefore, it completely skips all processing for this + * descriptor, guaranteeing its fd, events, and revents fields remain + * entirely untouched by the filter mask evaluation below it. + */ + nr_fds = fdarray__filter(fda, POLLHUP, NULL, NULL); + fdarray__fprintf_prefix(fda, " after", stderr); + + if (nr_fds != 0) { + pr_debug("\nfdarray__filter()=%d != 0, should be 0\n", + nr_fds); + goto out_delete; + } + if (fda->entries[2].fd == -1) { + pr_debug("\nfdarray__filter() illegally modified nonfilterable fd!"); + goto out_delete; + } + if (fda->entries[2].revents != POLLHUP) { + pr_debug("\nfdarray__filter() illegally modified nonfilterable revents!"); + goto out_delete; + } + + fda->priv[2].flags = 0; /* reset flags */ + pr_debug("\n"); err = 0; |