t.Skip("Skipping in short mode") // takes up to 64 seconds
	}
	got := runTestProg(t, "testprogcgo", "CgoSignalDeadlock")
	want := "OK\n"
	if got != want {
		t.Fatalf("expected %q, but got:\n%s", want, got)
	}
}

func TestCgoTraceback(t *testing.T) {
	t.Parallel()
	got := runTestProg(t, "testprogcgo", "CgoTraceback")
	want := "OK\n"
	if got != want {

func TestVDSO(t *testing.T) {
	t.Parallel()
	output := runTestProg(t, "testprog", "SignalInVDSO")
	want := "success\n"
	if output != want {
		t.Fatalf("output:\n%s\n\nwanted:\n%s", output, want)
	}
}

func testCrashHandler(t *testing.T, cgo bool) {
	type crashTest struct {
		Cgo bool
	}
	var output string
	if cgo {
		output = runTestProg(t, "testprogcgo", "Crash")
	} else {

		"CoroLockOSThreadLockIterYieldNewG",
		"CoroLockOSThreadLockAfterPull",
		"CoroLockOSThreadStopLocked",
		"CoroLockOSThreadStopLockedIterNested",
	} {
		t.Run(test, func(t *testing.T) {
			checkCoroTestProgOutput(t, runTestProg(t, "testprog", test))
		})
	}
}

func TestCoroCgoCallback(t *testing.T) {
	testenv.MustHaveCGO(t)
	if runtime.GOOS == "windows" {
		t.Skip("coro cgo callback tests not supported on Windows")
	}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package runtime_test

import "testing"

func TestFreeBSDNumCPU(t *testing.T) {
	got := runTestProg(t, "testprog", "FreeBSDNumCPU")
	want := "OK\n"
	if got != want {
		t.Fatalf("expected %q, but got:\n%s", want, got)
	}

	log.SetFlags(0)
	ctx, err := newContext()
	if err != nil {
		log.Fatal(err)
	}
	if err := ctx.runGenerators(); err != nil {
		log.Fatal(err)
	}
	if err := ctx.runTestProg("./testprog/annotations.go"); err != nil {
		log.Fatal(err)
	}
	if err := ctx.runTestProg("./testprog/annotations-stress.go"); err != nil {
		log.Fatal(err)
	}
}

type context struct {
	testNames map[string]struct{}
	filter    *regexp.Regexp
}

		{"panicCustomUint64", `panic: main.MyUint64(93)`},
		{"panicCustomUintptr", `panic: main.MyUintptr(93)`},
	}

	for _, tt := range tests {
		t := t
		t.Run(tt.name, func(t *testing.T) {
			output := runTestProg(t, "testprog", tt.name)
			if !strings.HasPrefix(output, tt.wantPanicPrefix) {
				t.Fatalf("%q\nis not present in\n%s", tt.wantPanicPrefix, output)
			}
		})
	}

	if !runtime.PreemptMSupported {
		t.Skip("asynchronous preemption not supported on this platform")
	}
	output := runTestProg(t, "testprog", "AsyncPreempt")
	want := "OK\n"
	if output != want {
		t.Fatalf("want %s, got %s\n", want, output)
	}
}

func TestGCFairness(t *testing.T) {
	output := runTestProg(t, "testprog", "GCFairness")
	want := "OK\n"
	if output != want {
		t.Fatalf("want %s, got %s\n", want, output)

		t.Errorf("got %v; expected SIGTERM", ee)
	}
}

func TestSignalIgnoreSIGTRAP(t *testing.T) {
	if runtime.GOOS == "openbsd" {
		testenv.SkipFlaky(t, 49725)
	}

	output := runTestProg(t, "testprognet", "SignalIgnoreSIGTRAP")
	want := "OK\n"
	if output != want {
		t.Fatalf("want %s, got %s\n", want, output)
	}
}

func TestSignalDuringExec(t *testing.T) {
	switch runtime.GOOS {

	"time"
	"unsafe"
)

func TestGcSys(t *testing.T) {
	t.Skip("skipping known-flaky test; golang.org/issue/37331")
	if os.Getenv("GOGC") == "off" {
		t.Skip("skipping test; GOGC=off in environment")
	}
	got := runTestProg(t, "testprog", "GCSys")
	want := "OK\n"
	if got != want {
		t.Fatalf("expected %q, but got %q", want, got)
	}
}

func TestGcDeepNesting(t *testing.T) {
	type T [2][2][2][2][2][2][2][2][2][2]*int
	a := new(T)

	}
}

func TestTracebackAncestors(t *testing.T) {
	goroutineRegex := regexp.MustCompile(`goroutine [0-9]+ \[`)
	for _, tracebackDepth := range []int{0, 1, 5, 50} {
		output := runTestProg(t, "testprog", "TracebackAncestors", fmt.Sprintf("GODEBUG=tracebackancestors=%d", tracebackDepth))

		numGoroutines := 3
		numFrames := 2
		ancestorsExpected := numGoroutines
		if numGoroutines > tracebackDepth {