stackSwitchCallback();

	// Next, verify that switching stacks doesn't break callbacks.

	char *stack1 = malloc(STACK_SIZE);
	if (stack1 == NULL) {
		perror("malloc");
		exit(1);
	}

	// Allocate the second stack before freeing the first to ensure we don't get
	// the same address from malloc.
	//
	// Will be freed in stackSwitchThread2.
	stack2 = malloc(STACK_SIZE);
	if (stack1 == NULL) {

// license that can be found in the LICENSE file.

package codegen

import "runtime"

// This file contains code generation tests related to the use of the
// stack.

// Check that stack stores are optimized away.

// 386:"TEXT\t.*, [$]0-"
// amd64:"TEXT\t.*, [$]0-"
// arm:"TEXT\t.*, [$]-4-"
// arm64:"TEXT\t.*, [$]0-"
// mips:"TEXT\t.*, [$]-4-"
// ppc64x:"TEXT\t.*, [$]0-"

import (
	"text/scanner"

	"cmd/internal/src"
)

// A Stack is a stack of TokenReaders. As the top TokenReader hits EOF,
// it resumes reading the next one down.
type Stack struct {
	tr []TokenReader
}

// Push adds tr to the top (end) of the input stack. (Popping happens automatically.)
func (s *Stack) Push(tr TokenReader) {
	s.tr = append(s.tr, tr)
}

func (s *Stack) Next() ScanToken {
	tos := s.tr[len(s.tr)-1]

	//
	// This value must be multiplied by the stack guard multiplier, so do not
	// use it directly. See runtime/stack.go:stackNosplit and
	// cmd/internal/objabi/stack.go:StackNosplit.
	StackNosplitBase = 800

	// We have three different sequences for stack bounds checks, depending on
	// whether the stack frame of a function is small, big, or huge.

	// After a stack split check the SP is allowed to be StackSmall bytes below

)

// PrintStack prints to standard error the stack trace returned by runtime.Stack.
func PrintStack() {
	os.Stderr.Write(Stack())
}

// Stack returns a formatted stack trace of the goroutine that calls it.
// It calls [runtime.Stack] with a large enough buffer to capture the entire trace.
func Stack() []byte {
	buf := make([]byte, 1024)
	for {
		n := runtime.Stack(buf, false)
		if n < len(buf) {
			return buf[:n]
		}

// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Test stack splitting code.
// Try to tickle stack splitting bugs by doing
// go, defer, and closure calls at different stack depths.

package main

type T [20]int

func g(c chan int, t T) {
	s := 0
	for i := 0; i < len(t); i++ {
		s += t[i]
	}
	c <- s
}

)

func StackNosplit(race bool) int {
	// This arithmetic must match that in runtime/stack.go:stackNosplit.
	return abi.StackNosplitBase * stackGuardMultiplier(race)
}

// stackGuardMultiplier returns a multiplier to apply to the default
// stack guard size. Larger multipliers are used for non-optimized
// builds that have larger stack frames or for specific targets.
func stackGuardMultiplier(race bool) int {

apiVersion: release-notes/v2
kind: bug-fix
area: traffic-management
issue:
- 45557
releaseNotes:
- |

	if node == nil {
		t.Fatalf("stack is empty")
	}
	if node.data != 43 {
		t.Fatalf("no lifo")
	}

	// Pop another.
	node = toMyNode(LFStackPop(stack))
	if node == nil {
		t.Fatalf("stack is empty")
	}
	if node.data != 42 {
		t.Fatalf("no lifo")
	}

	// Check the stack is empty again.
	if LFStackPop(stack) != nil {
		t.Fatalf("stack is not empty")
	}
	if *stack != 0 {

	m.pcs[pcs] = stack
	m.stacks[stack] = rec
	return rec
}

func (m *stackMap) profile() []traceviewer.ProfileRecord {
	prof := make([]traceviewer.ProfileRecord, 0, len(m.stacks))
	for stack, record := range m.stacks {
		rec := *record
		i := 0
		stack.Frames(func(frame trace.StackFrame) bool {
			rec.Stack = append(rec.Stack, &trace.Frame{
				PC:   frame.PC,
				Fn:   frame.Func,