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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},
})
}
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