//
// nosplit because it's called on the syscall path when stack movement is forbidden.
//
//go:nosplit
func (tl traceLocker) ok() bool {
	return tl.gen != 0
}

// traceRelease indicates that this M is done writing trace events.
//
// nosplit because it's called on the syscall path when stack movement is forbidden.
//
//go:nosplit
func traceRelease(tl traceLocker) {

// preparePanic sets up the stack to look like a call to sigpanic.
func (c *sigctxt) preparePanic(sig uint32, gp *g) {
	// We arrange link, and pc to pretend the panicking
	// function calls sigpanic directly.
	// Always save LINK to stack so that panics in leaf
	// functions are correctly handled. This smashes
	// the stack frame but we're not going back there
	// anyway.
	sp := c.sp() - goarch.PtrSize

		_ = v
	}
}

type R struct{ *T }

type Q interface {
	Foo([]interface{})
}

func main() {
	var count = 10000
	if runtime.Compiler == "gccgo" {
		// On targets without split-stack libgo allocates
		// a large stack for each goroutine. On 32-bit
		// systems this test can run out of memory.
		const intSize = 32 << (^uint(0) >> 63) // 32 or 64
		if intSize < 64 {
			count = 100
		}
	}

	var q Q = &R{&T{}}

	_PAGE_READWRITE = 0x0004
	_PAGE_NOACCESS  = 0x0001

	_ERROR_NOT_ENOUGH_MEMORY = 8
	_ERROR_COMMITMENT_LIMIT  = 1455
)

// Don't split the stack as this function may be invoked without a valid G,
// which prevents us from allocating more stack.
//
//go:nosplit
func sysAllocOS(n uintptr) unsafe.Pointer {
	return unsafe.Pointer(stdcall4(_VirtualAlloc, 0, n, _MEM_COMMIT|_MEM_RESERVE, _PAGE_READWRITE))
}

				"\"stack\":\".*\"}",
			json:       true,
			caller:     true,
			stackLevel: DebugLevel,
		},
		{
			f: func() { Info("Hello") },
			pat: "{\"level\":\"info\",\"time\":\"" + timePattern + "\",\"caller\":\"log/default_test.go:.*\",\"msg\":\"Hello\"," +
				"\"stack\":\".*\"}",
			json:       true,
			caller:     true,
			stackLevel: DebugLevel,

			},
		},

		{
			name:           "service single stack ipv4. want ipv4",
			requestFamily:  v1.IPv4Protocol,
			expectedResult: "10.0.0.10",
			service: v1.Service{
				Spec: v1.ServiceSpec{
					ClusterIPs: []string{"10.0.0.10"},
					IPFamilies: []v1.IPFamily{v1.IPv4Protocol},
				},
			},
		},

		{
			name:           "service single stack ipv4. want ipv6",
			requestFamily:  v1.IPv6Protocol,

			options:      makeOptionsWithCIDRs("", "10.0.0.0/16"),
		},
		{
			name:         "primary and secondary are provided but not dual stack v4-v4",
			expectErrors: true,
			options:      makeOptionsWithCIDRs("10.0.0.0/16", "11.0.0.0/16"),
		},
		{
			name:         "primary and secondary are provided but not dual stack v6-v6",
			expectErrors: true,
			options:      makeOptionsWithCIDRs("2000::/108", "3000::/108"),
		},
		{

	// Duff-adjusted address will be spilled and loaded

	*x = T{} // DUFFZERO
	runtime.GC()
	(*x)[0] = 1
	g()      // call a function with large frame, trigger a stack move
	*x = T{} // DUFFZERO again
}

//go:noinline
// a function with large frame
func g() {
	var x [1000]int
	_ = x
}

func main() {

	testenv.MustHaveGoBuild(t)

	// This test does a build of a specific canned package to
	// check whether merging of stack slots is taking place.
	// The idea is to do the compile with a trace option turned
	// on and then pick up on the frame offsets of specific
	// variables.
	//
	// Stack slot merging is a greedy algorithm, and there can
	// be many possible ways to overlap a given set of candidate

	// freed.
	HeapObjects uint64

	// Stack memory statistics.
	//
	// Stacks are not considered part of the heap, but the runtime
	// can reuse a span of heap memory for stack memory, and
	// vice-versa.

	// StackInuse is bytes in stack spans.
	//
	// In-use stack spans have at least one stack in them. These
	// spans can only be used for other stacks of the same size.
	//