throw("remapping stack memory failed")
	}
}

//go:nosplit
func raise(sig uint32) {
	thrkill(getthrid(), int(sig))
}

func signalM(mp *m, sig int) {
	thrkill(int32(mp.procid), sig)
}

// sigPerThreadSyscall is only used on linux, so we assign a bogus signal
// number.
const sigPerThreadSyscall = 1 << 31

//go:nosplit

func kqueue() int32

//go:noescape
func kevent(kq int32, ch *keventt, nch int32, ev *keventt, nev int32, ts *timespec) int32

func raiseproc(sig uint32)

func getthrid() int32
func thrkill(tid int32, sig int)

// read calls the read system call.
// It returns a non-negative number of bytes written or a negative errno value.
func read(fd int32, p unsafe.Pointer, n int32) int32

func closefd(fd int32) int32

//go:nosplit
//go:cgo_unsafe_args
func raiseproc(sig uint32) {
	libcCall(unsafe.Pointer(abi.FuncPCABI0(raiseproc_trampoline)), unsafe.Pointer(&sig))
}
func raiseproc_trampoline()

//go:nosplit
//go:cgo_unsafe_args
func thrkill(tid int32, sig int) {
	libcCall(unsafe.Pointer(abi.FuncPCABI0(thrkill_trampoline)), unsafe.Pointer(&tid))
}
func thrkill_trampoline()

// mmap is used to do low-level memory allocation via mmap. Don't allow stack

	}
	done := make(chan error, 1)
	go func() {
		done <- cmd.Wait()
	}()

	select {
	case err := <-abort:
		log.Warnf("Aborting proxy")
		if errKill := cmd.Process.Kill(); errKill != nil {
			log.Warnf("killing proxy caused an error %v", errKill)
		}
		return err
	case err := <-done:
		return err
	}
}

func (e *envoy) Cleanup() {
	if e.ConfigCleanup {

func init() {
	register("TgkillSegvInCgo", TgkillSegvInCgo)
}

func TgkillSegvInCgo() {
	c := make(chan bool)
	go func() {
		close(c)
		for {
			C.nop()
		}
	}()

	<-c

	syscall.Tgkill(syscall.Getpid(), syscall.Gettid(), syscall.SIGSEGV)

	// Wait for the OS to deliver the signal.
	C.pause()

}

func TgkillSegv() {
	c := make(chan bool)
	go func() {
		close(c)
		for i := 0; ; i++ {
			// Sum defined in segv.go.
			Sum += i
		}
	}()

	<-c

	syscall.Tgkill(syscall.Getpid(), syscall.Gettid(), syscall.SIGSEGV)

	// Wait for the OS to deliver the signal.
	select {}

// arguments and return space) for fn, or nil. tkill must be a function that
// will send SIGTRAP to thread ID tid. gp must be locked to its OS thread and
// running.
//
// On success, InjectDebugCall returns the panic value of fn or nil.
// If fn did not panic, its results will be available in args.
func InjectDebugCall(gp *g, fn any, regArgs *abi.RegArgs, stackArgs any, tkill func(tid int) error, returnOnUnsafePoint bool) (any, error) {

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// TODO: This test could be implemented on all (most?) UNIXes if we
// added syscall.Tgkill more widely.

// We skip all of these tests under race mode because our test thread
// spends all of its time in the race runtime, which isn't a safe
// point.

//go:build (amd64 || arm64 || ppc64le) && linux && !race

	RET

TEXT runtime·thr_self(SB),NOSPLIT,$8-4
	// thr_self(&0(FP))
	LEAL	ret+0(FP), AX
	MOVL	AX, 4(SP)
	MOVL	$SYS_thr_self, AX
	INT	$0x80
	RET

TEXT runtime·thr_kill(SB),NOSPLIT,$-4
	// thr_kill(tid, sig)
	MOVL	$SYS_thr_kill, AX
	INT	$0x80
	RET

TEXT runtime·raiseproc(SB),NOSPLIT,$16
	// getpid
	MOVL	$SYS_getpid, AX
	INT	$0x80
	// kill(self, sig)
	MOVL	AX, 4(SP)
	MOVL	sig+0(FP), AX

	RET

// func thr_self() thread
TEXT runtime·thr_self(SB),NOSPLIT,$8-8
	MOV	$ptr-8(SP), A0	// arg 1 &8(SP)
	MOV	$SYS_thr_self, T0
	ECALL
	MOV	ptr-8(SP), A0
	MOV	A0, ret+0(FP)
	RET

// func thr_kill(t thread, sig int)
TEXT runtime·thr_kill(SB),NOSPLIT,$0-16
	MOV	tid+0(FP), A0	// arg 1 pid
	MOV	sig+8(FP), A1	// arg 2 sig
	MOV	$SYS_thr_kill, T0
	ECALL
	RET

// func raiseproc(sig uint32)