diff options
Diffstat (limited to 'internal/eventloop_test.go')
| -rw-r--r-- | internal/eventloop_test.go | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/internal/eventloop_test.go b/internal/eventloop_test.go index 98d7696..3d256be 100644 --- a/internal/eventloop_test.go +++ b/internal/eventloop_test.go @@ -66,6 +66,7 @@ func TestEventloop(t *testing.T) { // NullEvent tests "SyncEventTest": makeSyncEventTestData(t), "GetcwdEventTest": makeGetcwdEventTestData(t), + "GetcwdFailureEventTest": makeGetcwdFailureEventTestData(t), "IoUringSetupEventTest": makeIoUringSetupEventTestData(t), "IoUringSetupFailureTest": makeIoUringSetupFailureTestData(t), "IoUringEnterEventTest": makeIoUringEnterEventTestData(t), @@ -1589,6 +1590,9 @@ func makeGetcwdEventTestData(t *testing.T) (td testData) { if !exitEv.Equals(ep.ExitEv) { t.Errorf("Expected '%v' but got '%v'", exitEv, ep.ExitEv) } + // getcwd args[0] (buf) is an OUTPUT buffer that is only valid at exit, + // so the path is never read at enter. Instead it is resolved at exit + // from /proc/<tid>/cwd, which must equal the process cwd here. if ep.File == nil { t.Fatalf("Expected getcwd to attach a pathname") } @@ -1600,6 +1604,33 @@ func makeGetcwdEventTestData(t *testing.T) (td testData) { return td } +// makeGetcwdFailureEventTestData locks in that a failed getcwd (negative +// errno return) does NOT resolve or attach a cwd path. The exit handler only +// reads /proc/<tid>/cwd when ret > 0 (success returns the path length); on +// error there is nothing to attach. +func makeGetcwdFailureEventTestData(t *testing.T) (td testData) { + enterEv, enterEvBytes := makeEnterNullEvent(t, defaulTime, defaultPid, defaultTid, types.SYS_ENTER_GETCWD) + td.rawTracepoints = append(td.rawTracepoints, enterEvBytes) + + // ERANGE: buffer too small. Raw syscall reports it as a negative errno. + exitEv, exitEvBytes := makeExitRetEvent(t, defaulTime+100, defaultPid, defaultTid, types.SYS_EXIT_GETCWD, -int64(syscall.ERANGE)) + td.rawTracepoints = append(td.rawTracepoints, exitEvBytes) + + td.validates = append(td.validates, func(t *testing.T, _ *eventLoop, ep *event.Pair) { + if !enterEv.Equals(ep.EnterEv) { + t.Errorf("Expected '%v' but got '%v'", enterEv, ep.EnterEv) + } + if !exitEv.Equals(ep.ExitEv) { + t.Errorf("Expected '%v' but got '%v'", exitEv, ep.ExitEv) + } + if ep.File != nil { + t.Errorf("Expected no cwd attached on getcwd failure, got '%v'", ep.File.Name()) + } + }) + + return td +} + func makeIoUringSetupEventTestData(t *testing.T) (td testData) { enterEv, enterEvBytes := makeEnterNullEvent(t, defaulTime, defaultPid, defaultTid, types.SYS_ENTER_IO_URING_SETUP) td.rawTracepoints = append(td.rawTracepoints, enterEvBytes) |