if runtime.GOARCH != "amd64" {
		t.Skip("skipping amd64-only test")
	}
	want := []string{"runtime_test.sehCallers", "runtime_test.TestSehUnwindDoublePanic.func1.1", "runtime.gopanic",
		"runtime_test.TestSehUnwindDoublePanic.func1", "runtime.gopanic", "runtime_test.TestSehUnwindDoublePanic"}
	defer func() {
		defer func() {
			if recover() == nil {
				t.Fatal("did not panic")
			}
			pcs := sehCallers()

	// Make sure we don't have any extra frames on the stack (due to
	// open-coded defer processing)
	want := []string{"runtime.Callers", "runtime_test.TestCallersDoublePanic.func1.1",
		"runtime.gopanic", "runtime_test.TestCallersDoublePanic.func1", "runtime.gopanic", "runtime_test.TestCallersDoublePanic"}

	defer func() {
		defer func() {
			pcs := make([]uintptr, 20)
			pcs = pcs[:runtime.Callers(0, pcs)]
			if recover() == nil {

	"debugCallV2":        abi.FuncID_debugCallV2,
	"gcBgMarkWorker":     abi.FuncID_gcBgMarkWorker,
	"rt0_go":             abi.FuncID_rt0_go,
	"goexit":             abi.FuncID_goexit,
	"gogo":               abi.FuncID_gogo,
	"gopanic":            abi.FuncID_gopanic,
	"handleAsyncEvent":   abi.FuncID_handleAsyncEvent,
	"main":               abi.FuncID_runtime_main,
	"mcall":              abi.FuncID_mcall,
	"morestack":          abi.FuncID_morestack,

	{"complex", ir.OCOMPLEX},
	{"copy", ir.OCOPY},
	{"delete", ir.ODELETE},
	{"imag", ir.OIMAG},
	{"len", ir.OLEN},
	{"make", ir.OMAKE},
	{"max", ir.OMAX},
	{"min", ir.OMIN},
	{"new", ir.ONEW},
	{"panic", ir.OPANIC},
	{"print", ir.OPRINT},
	{"println", ir.OPRINTLN},
	{"real", ir.OREAL},
	{"recover", ir.ORECOVER},
}

var unsafeFuncs = [...]struct {
	name string
	op   ir.Op
}{
	{"Add", ir.OUNSAFEADD},

		ir.OAS2RECV,
		ir.OAS2FUNC,
		ir.OAS2MAPR,
		ir.OCLEAR,
		ir.OCLOSE,
		ir.OCOPY,
		ir.OCALLINTER,
		ir.OCALL,
		ir.OCALLFUNC,
		ir.ODELETE,
		ir.OSEND,
		ir.OPRINT,
		ir.OPRINTLN,
		ir.OPANIC,
		ir.ORECOVERFP,
		ir.OGETG:
		if n.Typecheck() == 0 {
			base.Fatalf("missing typecheck: %+v", n)
		}

		init := ir.TakeInit(n)
		n = walkExpr(n, &init)
		if n.Op() == ir.ONAME {

	{"runtime.mallocgc", 1},
	{"runtime.panicdivide", 1},
	{"runtime.panicshift", 1},
	{"runtime.panicmakeslicelen", 1},
	{"runtime.panicmakeslicecap", 1},
	{"runtime.throwinit", 1},
	{"runtime.panicwrap", 1},
	{"runtime.gopanic", 1},
	{"runtime.gorecover", 1},
	{"runtime.goschedguarded", 1},
	{"runtime.goPanicIndex", 1},
	{"runtime.goPanicIndexU", 1},
	{"runtime.goPanicSliceAlen", 1},
	{"runtime.goPanicSliceAlenU", 1},

	pcs, err := parseStackPCs(crash)
	if err != nil {
		t.Fatal(err)
	}

	// Unwind the stack using this executable's symbol table.
	got := formatStack(pcs)
	want := `redacted.go:0: runtime.gopanic
traceback_system_test.go:85: runtime_test.child7: 	panic("oops")
traceback_system_test.go:68: runtime_test.child6: 	child7() // appears in stack trace

// The compiler emits calls to this function.
//
// gopanic should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:
//   - go.undefinedlabs.com/scopeagent
//   - github.com/goplus/igop
//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname gopanic
func gopanic(e any) {
	if e == nil {

	OMIN:              "min",
	OMOD:              "%",
	OMUL:              "*",
	ONEW:              "new",
	ONE:               "!=",
	ONOT:              "!",
	OOROR:             "||",
	OOR:               "|",
	OPANIC:            "panic",
	OPLUS:             "+",
	OPRINTLN:          "println",
	OPRINT:            "print",
	ORANGE:            "range",
	OREAL:             "real",
	ORECV:             "<-",

func mallocgc(size uintptr, typ *byte, needszero bool) unsafe.Pointer
func panicdivide()
func panicshift()
func panicmakeslicelen()
func panicmakeslicecap()
func throwinit()
func panicwrap()

func gopanic(interface{})
func gorecover(*int32) interface{}
func goschedguarded()

// Note: these declarations are just for wasm port.
// Other ports call assembly stubs instead.
func goPanicIndex(x int, y int)