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package integrationtests
import "testing"
// posixTimerTraceArgs restricts tracing to the POSIX timer-family syscalls so
// the test output is dominated by the lifecycle calls the workload issues.
// Note: timerfd_create is intentionally NOT in this list — it belongs to the
// IPC/eventfd family and returns an fd, whereas timer_create returns a timer_t
// through an output pointer (a null_event in the tracer).
var posixTimerTraceArgs = []string{
"-trace-syscalls",
"timer_create,timer_settime,timer_gettime,timer_getoverrun,timer_delete,timerfd_create",
}
// TestPosixTimerLifecycle verifies the POSIX per-process timer family is traced
// end-to-end. The workload runs timer_create -> timer_settime -> timer_gettime
// -> timer_getoverrun -> timer_delete; each must appear as an enter event.
func TestPosixTimerLifecycle(t *testing.T) {
h := newTestHarness(t)
result, pid, err := h.RunWithIorArgs("posix-timer-lifecycle", defaultDuration, posixTimerTraceArgs)
if err != nil {
t.Fatalf("run scenario posix-timer-lifecycle: %v", err)
}
AssertNoUnexpectedPID(t, result, pid)
AssertNoUnexpectedComm(t, result, "ioworkload")
AssertEventsPresent(t, result, []ExpectedEvent{
{Tracepoint: "enter_timer_create", Comm: "ioworkload", MinCount: 1},
{Tracepoint: "enter_timer_settime", Comm: "ioworkload", MinCount: 1},
{Tracepoint: "enter_timer_gettime", Comm: "ioworkload", MinCount: 1},
{Tracepoint: "enter_timer_getoverrun", Comm: "ioworkload", MinCount: 1},
{Tracepoint: "enter_timer_delete", Comm: "ioworkload", MinCount: 1},
})
// timer_create is a null_event: it must NOT capture an fd-style path the way
// the fd-returning siblings do. In particular it must not be confused with
// timerfd_create, whose records carry a "timerfd:" descriptor path. Guard
// against that regression: no timer_create record should have a timerfd path.
if got := totalTracepointPathCount(result, "enter_timer_create", "timerfd:"); got != 0 {
t.Fatalf("enter_timer_create records with a timerfd: descriptor path = %d, want 0; "+
"timer_create returns a timer_t, not an fd, and must not be classified like timerfd_create", got)
}
}
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