die("sigaction");
	}
}

// Test raising SIGIO on a C thread with an alternate signal stack
// when there is a Go signal handler for SIGIO.
static void* thread1(void* arg __attribute__ ((unused))) {
	stack_t ss;
	int i;
	stack_t nss;
	struct timespec ts;

	// Set up an alternate signal stack for this thread.
	memset(&ss, 0, sizeof ss);
	ss.ss_sp = malloc(CSIGSTKSZ);
	if (ss.ss_sp == NULL) {

	h.once.Do(func() {
		for _, fn := range h.notify {
			fn()
		}
	})
}

// Signal is called when an os.Signal is received, and guarantees that all notifications
// are executed, then the final handler is executed. This function should only be called once
// per Handler instance.
func (h *Handler) Signal(s os.Signal) {
	h.once.Do(func() {
		for _, fn := range h.notify {
			fn()
		}
		if h.final == nil {

[short] skip
env GOCACHE=$WORK/cache

# FuzzNonCrash sends itself a signal that does not appear to be a crash.
# We should not save a crasher.
! go test -fuzz=FuzzNonCrash
! exists testdata
! stdout unreachable
! stderr unreachable
stdout 'fuzzing process terminated by unexpected signal; no crash will be recorded: signal: terminated'

# FuzzKill sends itself a signal that cannot be caught by the worker process

	SIGPROF   = Signal(0x1b)
	SIGPWR    = Signal(0x20)
	SIGQUIT   = Signal(0x3)
	SIGSEGV   = Signal(0xb)
	SIGSTOP   = Signal(0x11)
	SIGSYS    = Signal(0xc)
	SIGTERM   = Signal(0xf)
	SIGTRAP   = Signal(0x5)
	SIGTSTP   = Signal(0x12)
	SIGTTIN   = Signal(0x15)
	SIGTTOU   = Signal(0x16)
	SIGURG    = Signal(0x10)
	SIGUSR1   = Signal(0x1e)
	SIGUSR2   = Signal(0x1f)
	SIGVTALRM = Signal(0x1a)

package main

import (
	"context"
	"os"
	"os/signal"
	"syscall"

	"istio.io/istio/cni/pkg/cmd"
	"istio.io/istio/pkg/log"
)

func main() {
	// Create context that cancels on termination signal
	ctx, cancel := context.WithCancel(context.Background())
	sigChan := make(chan os.Signal, 1)
	signal.Notify(sigChan, os.Interrupt, syscall.SIGTERM)
	go func(sigChan chan os.Signal, cancel context.CancelFunc) {
		sig := <-sigChan

//go:build unix

package signal_test

import (
	"context"
	"fmt"
	"log"
	"os"
	"os/signal"
)

var neverReady = make(chan struct{}) // never closed

// This example passes a context with a signal to tell a blocking function that
// it should abandon its work after a signal is received.
func ExampleNotifyContext() {
	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
	defer stop()

	SIGJVM1    = Signal(0x27)
	SIGJVM2    = Signal(0x28)
	SIGKILL    = Signal(0x9)
	SIGLOST    = Signal(0x25)
	SIGLWP     = Signal(0x21)
	SIGPIPE    = Signal(0xd)
	SIGPOLL    = Signal(0x16)
	SIGPROF    = Signal(0x1d)
	SIGPWR     = Signal(0x13)
	SIGQUIT    = Signal(0x3)
	SIGSEGV    = Signal(0xb)
	SIGSTOP    = Signal(0x17)
	SIGSYS     = Signal(0xc)
	SIGTERM    = Signal(0xf)

	SIGFPE      = syscall.Signal(0x8)
	SIGGRANT    = syscall.Signal(0x3c)
	SIGHUP      = syscall.Signal(0x1)
	SIGILL      = syscall.Signal(0x4)
	SIGINT      = syscall.Signal(0x2)
	SIGIO       = syscall.Signal(0x17)
	SIGIOINT    = syscall.Signal(0x10)
	SIGIOT      = syscall.Signal(0x6)
	SIGKAP      = syscall.Signal(0x3c)
	SIGKILL     = syscall.Signal(0x9)
	SIGLOST     = syscall.Signal(0x6)

				{
					Signal: evictionapi.SignalNodeFsAvailable,
				},
				{
					Signal: evictionapi.SignalPIDAvailable,
				},
				{
					Signal: evictionapi.SignalMemoryAvailable,
				},
			},
			expected: []evictionapi.Threshold{
				{
					Signal: evictionapi.SignalMemoryAvailable,
				},
				{
					Signal: evictionapi.SignalNodeFsAvailable,
				},
				{

                }
            }
        }

        then:
        poll {
            assert signal.waiting
        }

        when:
        signal.trigger()

        then:
        poll {
            assert signalCount.get() == 1
            assert signal.waiting
        }

        when:
        signal.trigger()

        then:
        poll {
            assert signalCount.get() == 2
        }