//
// This is a convenience function for easily adding correct
// stacks to traces.
func (g *Generation) Stack(stk []trace.StackFrame) uint64 {
	if len(stk) == 0 {
		return 0
	}
	if len(stk) > 32 {
		panic("stack too big for test")
	}
	var stkc stack
	copy(stkc.stk[:], stk)
	stkc.len = len(stk)
	if id, ok := g.stacks[stkc]; ok {
		return id
	}
	id := uint64(len(g.stacks) + 1)
	g.stacks[stkc] = id

	e := &m.free[0]
	m.free = m.free[1:]
	e.nextHash = m.hash[h]
	e.tag = tag

	if len(m.freeStk) < len(stk) {
		m.freeStk = make([]uintptr, 1024)
	}
	// Limit cap to prevent append from clobbering freeStk.
	e.stk = m.freeStk[:len(stk):len(stk)]
	m.freeStk = m.freeStk[len(stk):]

	for j := range stk {
		e.stk[j] = uintptr(stk[j])
	}
	if m.hash == nil {
		m.hash = make(map[uintptr]*profMapEntry)
	}
	m.hash[h] = e

	allocateTransient2MInline()
	allocatePersistent1K()
	allocateReflect()
	memSink = nil

	runtime.GC() // materialize stats

	memoryProfilerRun++

	tests := []struct {
		stk    []string
		legacy string
	}{{
		stk: []string{"runtime/pprof.allocatePersistent1K", "runtime/pprof.TestMemoryProfiler"},
		legacy: fmt.Sprintf(`%v: %v \[%v: %v\] @ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+

					stk = stk[i:]
					break
				}
			}
			locs = b.appendLocsForStack(locs[:0], stk)
			if len(locs) > 0 {
				break
			}
			hideRuntime = false // try again, and show all frames next time.
		}

		values[0], values[1] = scaleHeapSample(r.AllocObjects, r.AllocBytes, rate)
		values[2], values[3] = scaleHeapSample(r.InUseObjects(), r.InUseBytes(), rate)
		var blockSize int64

	return string(sbuf), true
}

var callbackok bool

//export CallbackNumGoroutine
func CallbackNumGoroutine() {
	stk, ok := checkNumGoroutine("second", 2+baseGoroutines)
	if !ok {
		return
	}
	if !strings.Contains(stk, "CallbackNumGoroutine") {
		fmt.Printf("missing CallbackNumGoroutine from stack:\n%s\n", stk)
		return
	}

	callbackok = true

func tfork(param *tforkt, psize uintptr, mm *m, gg *g, fn uintptr) int32

// May run with m.p==nil, so write barriers are not allowed.
//
//go:nowritebarrier
func newosproc(mp *m) {
	stk := unsafe.Pointer(mp.g0.stack.hi)
	if false {
		print("newosproc stk=", stk, " m=", mp, " g=", mp.g0, " id=", mp.id, " ostk=", &mp, "\n")
	}

	// Stack pointer must point inside stack area (as marked with MAP_STACK),
	// rather than at the top of it.

	return w.a[i]
}

func main() {
	defer func() {
		e := recover()
		if e == nil {
			panic("bounds check didn't fail")
		}
		stk := string(debug.Stack())
		if !strings.Contains(stk, "issue22083.go:40") {
			panic("wrong stack trace: " + stk)
		}
	}()
	foo := Wrapper{a: []int{0, 1, 2}}
	_ = foo.Get(0)
	_ = foo.Get(1)
	_ = foo.Get(2)
	_ = foo.Get(3) // stack trace should mention this line

package runtime

import (
	"internal/abi"
	"unsafe"
)

func lwp_mcontext_init(mc *mcontextt, stk unsafe.Pointer, mp *m, gp *g, fn uintptr) {
	// Machine dependent mcontext initialisation for LWP.
	mc.__gregs[_REG_EIP] = uint32(abi.FuncPCABI0(lwp_tramp))
	mc.__gregs[_REG_UESP] = uint32(uintptr(stk))
	mc.__gregs[_REG_EBX] = uint32(uintptr(unsafe.Pointer(mp)))
	mc.__gregs[_REG_EDX] = uint32(uintptr(unsafe.Pointer(gp)))

package runtime

import (
	"internal/abi"
	"unsafe"
)

func lwp_mcontext_init(mc *mcontextt, stk unsafe.Pointer, mp *m, gp *g, fn uintptr) {
	// Machine dependent mcontext initialisation for LWP.
	mc.__gregs[_REG_RIP] = uint64(abi.FuncPCABI0(lwp_tramp))
	mc.__gregs[_REG_RSP] = uint64(uintptr(stk))
	mc.__gregs[_REG_R8] = uint64(uintptr(unsafe.Pointer(mp)))
	mc.__gregs[_REG_R9] = uint64(uintptr(unsafe.Pointer(gp)))

			for atomic.LoadUint32(&stop) == 0 {
				syscall.Close(-1)
			}
			wg.Done()
		}()
	}

	max := 10000
	if testing.Short() {
		max = 100
	}
	stk := make([]runtime.StackRecord, 128)
	for n := 0; n < max; n++ {
		_, ok := runtime.GoroutineProfile(stk)
		if !ok {
			t.Fatalf("GoroutineProfile failed")
		}
	}

	// If the program didn't crash, we passed.
	atomic.StoreUint32(&stop, 1)
	wg.Wait()