bghelpers.Wait()

	xexit(2)
}

var atexits []func()

// xexit exits the process with return code n.
func xexit(n int) {
	for i := len(atexits) - 1; i >= 0; i-- {
		atexits[i]()
	}
	os.Exit(n)
}

// xatexit schedules the exit-handler f to be run when the program exits.
func xatexit(f func()) {
	atexits = append(atexits, f)
}

	obj := pathf("%s/pkg/obj", goroot)
	if !isdir(obj) {
		xmkdir(obj)
	}
	xatexit(func() { xremove(obj) })

	// Create build cache directory.
	objGobuild := pathf("%s/pkg/obj/go-build", goroot)
	if rebuildall {
		xremoveall(objGobuild)
	}
	xmkdirall(objGobuild)
	xatexit(func() { xremoveall(objGobuild) })

	// Create directory for bootstrap versions of standard library .a files.

	// We could use a temporary directory outside $GOROOT instead,
	// but it is easier to debug on failure if the files are in a known location.
	workspace := pathf("%s/pkg/bootstrap", goroot)
	xremoveall(workspace)
	xatexit(func() { xremoveall(workspace) })
	base := pathf("%s/src/bootstrap", workspace)
	xmkdirall(base)

	// Copy source code into $GOROOT/pkg/bootstrap and rewrite import paths.

	if strings.HasPrefix(os.Getenv("GO_BUILDER_NAME"), "linux-") {
		if os.Getuid() == 0 {
			// Don't bother making GOROOT unwritable:
			// we're running as root, so permissions would have no effect.
		} else {
			xatexit(t.makeGOROOTUnwritable())
		}
	}

	if !t.json {
		if err := t.maybeLogMetadata(); err != nil {
			t.failed = true
			if t.keepGoing {
				log.Printf("Failed logging metadata: %v", err)
			} else {

go tool covdata percent -i=data/goodexit
stdout  'coverage:.*[1-9][0-9.]+%'

# Program makes a direct call to os.Exit(1).
env GOCOVERDIR=data/badexit
! exec ./example.exe badexit
! stderr '^warning: GOCOVERDIR not set, no coverage data emitted'
go tool covdata percent -i=data/badexit
stdout  'coverage:.*[1-9][0-9.]+%'

# Program invokes panic.
env GOCOVERDIR=data/panic
! exec ./example.exe panic

var memprofilerateflag = flag.Int("memprofilerate", 0, "Set memprofile sampling rate to value")

var matchpkg func(name string) bool

var atExitFuncs []func()

func atExit(f func()) {
	atExitFuncs = append(atExitFuncs, f)
}

func Exit(code int) {
	for i := len(atExitFuncs) - 1; i >= 0; i-- {
		f := atExitFuncs[i]
		atExitFuncs = atExitFuncs[:i]
		f()
	}
	os.Exit(code)
}

package ld

import (
	"cmd/link/internal/loader"
	"encoding/binary"
	"fmt"
	"os"
)

var atExitFuncs []func()

func AtExit(f func()) {
	atExitFuncs = append(atExitFuncs, f)
}

// runAtExitFuncs runs the queued set of AtExit functions.
func runAtExitFuncs() {
	for i := len(atExitFuncs) - 1; i >= 0; i-- {
		atExitFuncs[i]()
	}
	atExitFuncs = nil
}

		{
			f:        func() { Fatal("Hello") },
			pat:      timePattern + "\tfatal\tHello",
			wantExit: true,
		},
		{
			f:        func() { Fatalf("Hello") },
			pat:      timePattern + "\tfatal\tHello",
			wantExit: true,
		},
		{
			f:        func() { Fatalf("%s", "Hello") },
			pat:      timePattern + "\tfatal\tHello",
			wantExit: true,
		},

		{
			f:      func() { Debug("Hello") },

	if logHeapTweaks {
		sample := append([]metrics.Sample(nil), sample...) // avoid races with GC callback
		AtExit(func() {
			metrics.Read(sample)
			goal := sample[GOAL].Value.Uint64()
			count := sample[COUNT].Value.Uint64()
			oldGogc := debug.SetGCPercent(100)
			if oldGogc == 100 {
				fmt.Fprintf(os.Stderr, "GCAdjust: AtExit goal %d gogc %d count %d maxprocs %d gcConcurrency %d\n",
					goal, oldGogc, count, mp, gcConcurrency)

			pat:      timePattern + "\tfatal\ttestScope\tHello",
			wantExit: true,
		},
		{
			f:        func() { s.Fatalf("Hello") },
			pat:      timePattern + "\tfatal\ttestScope\tHello",
			wantExit: true,
		},
		{
			f:        func() { s.Fatalf("%s", "Hello") },
			pat:      timePattern + "\tfatal\ttestScope\tHello",
			wantExit: true,
		},

		{
			f:      func() { s.Debug("Hello") },