package integrationtests

import "testing"

// miscTraceArgs restricts tracing to the syscalls the misc-basic workload
// issues, so the captured output is dominated by those calls.
// Note: the tracer names the uname tracepoint after the underlying kernel
// syscall sys_newuname, i.e. "newuname" (not "uname"). vmsplice and alarm are
// issued too, but the must-haves below are the three pure-read calls whose
// tracepoints are guaranteed to fire deterministically. Neither vmsplice nor
// alarm is a Misc-family syscall: vmsplice is FamilyNetwork — the iovec<->pipe
// variant of splice(2), sibling to splice/tee whose transfer coverage lives in
// retbytes_test.go — and alarm is FamilyTime (it shares setitimer's ITIMER_REAL
// timer). The misc-basic scenario still issues both as harmless side-effect-free
// calls, and the -trace-syscalls filter is by syscall name, so they are captured
// regardless of family.
var miscTraceArgs = []string{
	"-trace-syscalls",
	"getcpu,newuname,sysinfo,vmsplice,alarm",
}

// TestMiscBasic verifies the Misc syscall family is traced end-to-end. The
// misc-basic workload issues getcpu, uname (sys_newuname), and sysinfo (the
// three Misc-family must-haves asserted below), plus vmsplice (FamilyNetwork,
// into a self-drained pipe) and alarm(0) (FamilyTime) — all unprivileged,
// non-blocking, and free of global side effects. Each required syscall must
// appear as an enter event attributed to the ioworkload process.
func TestMiscBasic(t *testing.T) {
	h := newTestHarness(t)
	result, pid, err := h.RunWithIorArgs("misc-basic", defaultDuration, miscTraceArgs)
	if err != nil {
		t.Fatalf("run scenario misc-basic: %v", err)
	}

	AssertNoUnexpectedPID(t, result, pid)
	AssertNoUnexpectedComm(t, result, "ioworkload")
	AssertEventsPresent(t, result, []ExpectedEvent{
		{Tracepoint: "enter_getcpu", Comm: "ioworkload", MinCount: 1},
		{Tracepoint: "enter_newuname", Comm: "ioworkload", MinCount: 1},
		{Tracepoint: "enter_sysinfo", Comm: "ioworkload", MinCount: 1},
		// alarm(0) is issued unconditionally by misc-basic; the enter
		// tracepoint always fires (syscall entry is unconditional, alarm never
		// fails), so this assertion is deterministic. Covers the alarm enter
		// path end-to-end even though alarm is now FamilyTime, not Misc.
		{Tracepoint: "enter_alarm", Comm: "ioworkload", MinCount: 1},
	})
}