diff options
Diffstat (limited to 'internal/generate/classify_test.go')
| -rw-r--r-- | internal/generate/classify_test.go | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/internal/generate/classify_test.go b/internal/generate/classify_test.go index 7dddab7..d150bdf 100644 --- a/internal/generate/classify_test.go +++ b/internal/generate/classify_test.go @@ -40,6 +40,35 @@ func TestClassifyFdWrite(t *testing.T) { } } +// TestClassifyFdLseek pins lseek(2) as a single-fd KindFd event. lseek's +// tracepoint exposes a generic "fd" field of an fd-like type at args[0], so it +// classifies via classifyByField exactly like read/write — the fd is captured +// from args[0], while the off_t offset and whence args are ignored. The return +// value (resulting file offset) is asserted UNCLASSIFIED separately in +// retclassify_test.go (TestClassifyRetUnclassified) and end-to-end in +// TestClassifyRetExitLseek below. +func TestClassifyFdLseek(t *testing.T) { + r := classifyFromData(t, FormatLseek) + if r.Kind != KindFd { + t.Errorf("lseek: got kind %d, want KindFd", r.Kind) + } +} + +// TestClassifyRetExitLseek locks in that sys_exit_lseek is a plain ret_event +// (KindRet) and that ClassifyRet keeps it UNCLASSIFIED. lseek returns the new +// file OFFSET (bytes-from-start), not a transferred byte count, so it must +// never be classified as READ/WRITE/TRANSFER — doing so would inflate I/O byte +// accounting. +func TestClassifyRetExitLseek(t *testing.T) { + r := classifyFromData(t, FormatExitLseek) + if r.Kind != KindRet { + t.Errorf("lseek exit: got kind %d, want KindRet", r.Kind) + } + if got := ClassifyRet("sys_exit_lseek"); got != Unclassified { + t.Errorf("lseek exit: ClassifyRet = %q, want UNCLASSIFIED", got) + } +} + func TestClassifyFdPidfdGetfd(t *testing.T) { r := classifyFromData(t, FormatPidfdGetfd) if r.Kind != KindFd { @@ -2072,6 +2101,7 @@ func TestClassifySyscallPairAccepted(t *testing.T) { enterKind TracepointKind }{ {"read", FormatRead, FormatExitRead, KindFd}, + {"lseek", FormatLseek, FormatExitLseek, KindFd}, {"openat", FormatOpenat, FormatExitOpenat, KindOpen}, {"rename", FormatRename, FormatExitRename, KindName}, {"close", FormatClose, FormatExitClose, KindFd}, |