runtime: rename gothrow to throw

Rename "gothrow" to "throw" now that the C version of "throw"
is no longer needed.

This change is purely mechanical except in panic.go where the
old version of "throw" has been deleted.

sed -i "" 's/[[:<:]]gothrow[[:>:]]/throw/g' runtime/*.go

Change-Id: Icf0752299c35958b92870a97111c67bcd9159dc3
Reviewed-on: https://go-review.googlesource.com/2150Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Dave Cheney <dave@cheney.net>

src/runtime/cgocall.go

@@ -90,11 +90,11 @@ func cgocall(fn, arg unsafe.Pointer) {
 //go:nosplit
 func cgocall_errno(fn, arg unsafe.Pointer) int32 {
 	if !iscgo && GOOS != "solaris" && GOOS != "windows" {
-		gothrow("cgocall unavailable")
+		throw("cgocall unavailable")
 	}
 
 	if fn == nil {
-		gothrow("cgocall nil")
+		throw("cgocall nil")
 	}
 
 	if raceenabled {
@@ -161,7 +161,7 @@ func cmalloc(n uintptr) unsafe.Pointer {
 	args.n = uint64(n)
 	cgocall(_cgo_malloc, unsafe.Pointer(&args))
 	if args.ret == nil {
-		gothrow("C malloc failed")
+		throw("C malloc failed")
 	}
 	return args.ret
 }
@@ -218,7 +218,7 @@ func cgocallbackg1() {
 	sp := gp.m.g0.sched.sp
 	switch GOARCH {
 	default:
-		gothrow("cgocallbackg is unimplemented on arch")
+		throw("cgocallbackg is unimplemented on arch")
 	case "arm":
 		// On arm, stack frame is two words and there's a saved LR between
 		// SP and the stack frame and between the stack frame and the arguments.
@@ -253,7 +253,7 @@ func unwindm(restore *bool) {
 	sched := &mp.g0.sched
 	switch GOARCH {
 	default:
-		gothrow("unwindm not implemented")
+		throw("unwindm not implemented")
 	case "386", "amd64":
 		sched.sp = *(*uintptr)(unsafe.Pointer(sched.sp))
 	case "arm":
@@ -264,12 +264,12 @@ func unwindm(restore *bool) {
 
 // called from assembly
 func badcgocallback() {
-	gothrow("misaligned stack in cgocallback")
+	throw("misaligned stack in cgocallback")
 }
 
 // called from (incomplete) assembly
 func cgounimpl() {
-	gothrow("cgo not implemented")
+	throw("cgo not implemented")
 }
 
 var racecgosync uint64 // represents possible synchronization in C code

src/runtime/chan.go

@@ -26,10 +26,10 @@ func makechan(t *chantype, size int64) *hchan {
 
 	// compiler checks this but be safe.
 	if elem.size >= 1<<16 {
-		gothrow("makechan: invalid channel element type")
+		throw("makechan: invalid channel element type")
 	}
 	if hchanSize%maxAlign != 0 || elem.align > maxAlign {
-		gothrow("makechan: bad alignment")
+		throw("makechan: bad alignment")
 	}
 	if size < 0 || int64(uintptr(size)) != size || (elem.size > 0 && uintptr(size) > (_MaxMem-hchanSize)/uintptr(elem.size)) {
 		panic("makechan: size out of range")
@@ -95,7 +95,7 @@ func chansend(t *chantype, c *hchan, ep unsafe.Pointer, block bool, callerpc uin
 			return false
 		}
 		gopark(nil, nil, "chan send (nil chan)")
-		gothrow("unreachable")
+		throw("unreachable")
 	}
 
 	if debugChan {
@@ -180,12 +180,12 @@ func chansend(t *chantype, c *hchan, ep unsafe.Pointer, block bool, callerpc uin
 
 		// someone woke us up.
 		if mysg != gp.waiting {
-			gothrow("G waiting list is corrupted!")
+			throw("G waiting list is corrupted!")
 		}
 		gp.waiting = nil
 		if gp.param == nil {
 			if c.closed == 0 {
-				gothrow("chansend: spurious wakeup")
+				throw("chansend: spurious wakeup")
 			}
 			panic("send on closed channel")
 		}
@@ -339,7 +339,7 @@ func chanrecv(t *chantype, c *hchan, ep unsafe.Pointer, block bool) (selected, r
 			return
 		}
 		gopark(nil, nil, "chan receive (nil chan)")
-		gothrow("unreachable")
+		throw("unreachable")
 	}
 
 	// Fast path: check for failed non-blocking operation without acquiring the lock.
@@ -416,7 +416,7 @@ func chanrecv(t *chantype, c *hchan, ep unsafe.Pointer, block bool) (selected, r
 
 		// someone woke us up
 		if mysg != gp.waiting {
-			gothrow("G waiting list is corrupted!")
+			throw("G waiting list is corrupted!")
 		}
 		gp.waiting = nil
 		if mysg.releasetime > 0 {
@@ -435,7 +435,7 @@ func chanrecv(t *chantype, c *hchan, ep unsafe.Pointer, block bool) (selected, r
 
 		lock(&c.lock)
 		if c.closed == 0 {
-			gothrow("chanrecv: spurious wakeup")
+			throw("chanrecv: spurious wakeup")
 		}
 		return recvclosed(c, ep)
 	}

src/runtime/env_posix.go

@@ -20,7 +20,7 @@ func getenv(s *byte) *byte {
 func gogetenv(key string) string {
 	env := environ()
 	if env == nil {
-		gothrow("getenv before env init")
+		throw("getenv before env init")
 	}
 	for _, s := range environ() {
 		if len(s) > len(key) && s[len(key)] == '=' && s[:len(key)] == key {

src/runtime/hashmap.go

@@ -158,7 +158,7 @@ func (b *bmap) setoverflow(t *maptype, ovf *bmap) {
 
 func makemap(t *maptype, hint int64) *hmap {
 	if sz := unsafe.Sizeof(hmap{}); sz > 48 || sz != uintptr(t.hmap.size) {
-		gothrow("bad hmap size")
+		throw("bad hmap size")
 	}
 
 	if hint < 0 || int64(int32(hint)) != hint {
@@ -167,41 +167,41 @@ func makemap(t *maptype, hint int64) *hmap {
 	}
 
 	if !ismapkey(t.key) {
-		gothrow("runtime.makemap: unsupported map key type")
+		throw("runtime.makemap: unsupported map key type")
 	}
 
 	// check compiler's and reflect's math
 	if t.key.size > maxKeySize && (!t.indirectkey || t.keysize != uint8(ptrSize)) ||
 		t.key.size <= maxKeySize && (t.indirectkey || t.keysize != uint8(t.key.size)) {
-		gothrow("key size wrong")
+		throw("key size wrong")
 	}
 	if t.elem.size > maxValueSize && (!t.indirectvalue || t.valuesize != uint8(ptrSize)) ||
 		t.elem.size <= maxValueSize && (t.indirectvalue || t.valuesize != uint8(t.elem.size)) {
-		gothrow("value size wrong")
+		throw("value size wrong")
 	}
 
 	// invariants we depend on.  We should probably check these at compile time
 	// somewhere, but for now we'll do it here.
 	if t.key.align > bucketCnt {
-		gothrow("key align too big")
+		throw("key align too big")
 	}
 	if t.elem.align > bucketCnt {
-		gothrow("value align too big")
+		throw("value align too big")
 	}
 	if uintptr(t.key.size)%uintptr(t.key.align) != 0 {
-		gothrow("key size not a multiple of key align")
+		throw("key size not a multiple of key align")
 	}
 	if uintptr(t.elem.size)%uintptr(t.elem.align) != 0 {
-		gothrow("value size not a multiple of value align")
+		throw("value size not a multiple of value align")
 	}
 	if bucketCnt < 8 {
-		gothrow("bucketsize too small for proper alignment")
+		throw("bucketsize too small for proper alignment")
 	}
 	if dataOffset%uintptr(t.key.align) != 0 {
-		gothrow("need padding in bucket (key)")
+		throw("need padding in bucket (key)")
 	}
 	if dataOffset%uintptr(t.elem.align) != 0 {
-		gothrow("need padding in bucket (value)")
+		throw("need padding in bucket (value)")
 	}
 
 	// find size parameter which will hold the requested # of elements
@@ -561,7 +561,7 @@ func mapiterinit(t *maptype, h *hmap, it *hiter) {
 	}
 
 	if unsafe.Sizeof(hiter{})/ptrSize != 10 {
-		gothrow("hash_iter size incorrect") // see ../../cmd/gc/reflect.c
+		throw("hash_iter size incorrect") // see ../../cmd/gc/reflect.c
 	}
 	it.t = t
 	it.h = h
@@ -735,7 +735,7 @@ next:
 
 func hashGrow(t *maptype, h *hmap) {
 	if h.oldbuckets != nil {
-		gothrow("evacuation not done in time")
+		throw("evacuation not done in time")
 	}
 	oldbuckets := h.buckets
 	if checkgc {
@@ -796,7 +796,7 @@ func evacuate(t *maptype, h *hmap, oldbucket uintptr) {
 					continue
 				}
 				if top < minTopHash {
-					gothrow("bad map state")
+					throw("bad map state")
 				}
 				k2 := k
 				if t.indirectkey {

src/runtime/heapdump.go

@@ -222,7 +222,7 @@ func dumpbv(cbv *bitvector, offset uintptr) {
 	for i := uintptr(0); i < uintptr(bv.n); i += bitsPerPointer {
 		switch bv.bytedata[i/8] >> (i % 8) & 3 {
 		default:
-			gothrow("unexpected pointer bits")
+			throw("unexpected pointer bits")
 		case _BitsDead:
 			// BitsDead has already been processed in makeheapobjbv.
 			// We should only see it in stack maps, in which case we should continue processing.
@@ -392,7 +392,7 @@ func dumpgs() {
 		switch status {
 		default:
 			print("runtime: unexpected G.status ", hex(status), "\n")
-			gothrow("dumpgs in STW - bad status")
+			throw("dumpgs in STW - bad status")
 		case _Gdead:
 			// ok
 		case _Grunnable,
@@ -462,7 +462,7 @@ func dumpobjs() {
 		size := s.elemsize
 		n := (s.npages << _PageShift) / size
 		if n > uintptr(len(freemark)) {
-			gothrow("freemark array doesn't have enough entries")
+			throw("freemark array doesn't have enough entries")
 		}
 		for l := s.freelist; l.ptr() != nil; l = l.ptr().next {
 			freemark[(uintptr(l)-p)/size] = true
@@ -708,7 +708,7 @@ func makeheapobjbv(p uintptr, size uintptr) bitvector {
 		n := nptr*_BitsPerPointer/8 + 1
 		p := sysAlloc(n, &memstats.other_sys)
 		if p == nil {
-			gothrow("heapdump: out of memory")
+			throw("heapdump: out of memory")
 		}
 		tmpbuf = (*[1 << 30]byte)(p)[:n]
 	}

src/runtime/iface.go

@@ -26,7 +26,7 @@ type fInterface interface {
 
 func getitab(inter *interfacetype, typ *_type, canfail bool) *itab {
 	if len(inter.mhdr) == 0 {
-		gothrow("internal error - misuse of itab")
+		throw("internal error - misuse of itab")
 	}
 
 	// easy case
@@ -114,7 +114,7 @@ search:
 	nextimethod:
 	}
 	if locked == 0 {
-		gothrow("invalid itab locking")
+		throw("invalid itab locking")
 	}
 	m.link = hash[h]
 	atomicstorep(unsafe.Pointer(&hash[h]), unsafe.Pointer(m))

src/runtime/lfstack.go

@@ -14,7 +14,7 @@ func lfstackpush(head *uint64, node *lfnode) {
 	new := lfstackPack(node, node.pushcnt)
 	if node1, _ := lfstackUnpack(new); node1 != node {
 		println("runtime: lfstackpush invalid packing: node=", node, " cnt=", hex(node.pushcnt), " packed=", hex(new), " -> node=", node1, "\n")
-		gothrow("lfstackpush")
+		throw("lfstackpush")
 	}
 	for {
 		old := atomicload64(head)

src/runtime/lock_futex.go

@@ -43,7 +43,7 @@ func lock(l *mutex) {
 	gp := getg()
 
 	if gp.m.locks < 0 {
-		gothrow("runtime·lock: lock count")
+		throw("runtime·lock: lock count")
 	}
 	gp.m.locks++
 
@@ -102,7 +102,7 @@ func lock(l *mutex) {
 func unlock(l *mutex) {
 	v := xchg(key32(&l.key), mutex_unlocked)
 	if v == mutex_unlocked {
-		gothrow("unlock of unlocked lock")
+		throw("unlock of unlocked lock")
 	}
 	if v == mutex_sleeping {
 		futexwakeup(key32(&l.key), 1)
@@ -111,7 +111,7 @@ func unlock(l *mutex) {
 	gp := getg()
 	gp.m.locks--
 	if gp.m.locks < 0 {
-		gothrow("runtime·unlock: lock count")
+		throw("runtime·unlock: lock count")
 	}
 	if gp.m.locks == 0 && gp.preempt { // restore the preemption request in case we've cleared it in newstack
 		gp.stackguard0 = stackPreempt
@@ -127,7 +127,7 @@ func notewakeup(n *note) {
 	old := xchg(key32(&n.key), 1)
 	if old != 0 {
 		print("notewakeup - double wakeup (", old, ")\n")
-		gothrow("notewakeup - double wakeup")
+		throw("notewakeup - double wakeup")
 	}
 	futexwakeup(key32(&n.key), 1)
 }
@@ -135,7 +135,7 @@ func notewakeup(n *note) {
 func notesleep(n *note) {
 	gp := getg()
 	if gp != gp.m.g0 {
-		gothrow("notesleep not on g0")
+		throw("notesleep not on g0")
 	}
 	for atomicload(key32(&n.key)) == 0 {
 		gp.m.blocked = true
@@ -181,7 +181,7 @@ func notetsleep_internal(n *note, ns int64) bool {
 func notetsleep(n *note, ns int64) bool {
 	gp := getg()
 	if gp != gp.m.g0 && gp.m.gcing == 0 {
-		gothrow("notetsleep not on g0")
+		throw("notetsleep not on g0")
 	}
 
 	return notetsleep_internal(n, ns)
@@ -192,7 +192,7 @@ func notetsleep(n *note, ns int64) bool {
 func notetsleepg(n *note, ns int64) bool {
 	gp := getg()
 	if gp == gp.m.g0 {
-		gothrow("notetsleepg on g0")
+		throw("notetsleepg on g0")
 	}
 
 	entersyscallblock(0)

src/runtime/lock_sema.go

@@ -34,7 +34,7 @@ const (
 func lock(l *mutex) {
 	gp := getg()
 	if gp.m.locks < 0 {
-		gothrow("runtime·lock: lock count")
+		throw("runtime·lock: lock count")
 	}
 	gp.m.locks++
 
@@ -112,7 +112,7 @@ func unlock(l *mutex) {
 	}
 	gp.m.locks--
 	if gp.m.locks < 0 {
-		gothrow("runtime·unlock: lock count")
+		throw("runtime·unlock: lock count")
 	}
 	if gp.m.locks == 0 && gp.preempt { // restore the preemption request in case we've cleared it in newstack
 		gp.stackguard0 = stackPreempt
@@ -140,7 +140,7 @@ func notewakeup(n *note) {
 		// Nothing was waiting. Done.
 	case v == locked:
 		// Two notewakeups!  Not allowed.
-		gothrow("notewakeup - double wakeup")
+		throw("notewakeup - double wakeup")
 	default:
 		// Must be the waiting m.  Wake it up.
 		semawakeup((*m)(unsafe.Pointer(v)))
@@ -150,7 +150,7 @@ func notewakeup(n *note) {
 func notesleep(n *note) {
 	gp := getg()
 	if gp != gp.m.g0 {
-		gothrow("notesleep not on g0")
+		throw("notesleep not on g0")
 	}
 	if gp.m.waitsema == 0 {
 		gp.m.waitsema = semacreate()
@@ -158,7 +158,7 @@ func notesleep(n *note) {
 	if !casuintptr(&n.key, 0, uintptr(unsafe.Pointer(gp.m))) {
 		// Must be locked (got wakeup).
 		if n.key != locked {
-			gothrow("notesleep - waitm out of sync")
+			throw("notesleep - waitm out of sync")
 		}
 		return
 	}
@@ -180,7 +180,7 @@ func notetsleep_internal(n *note, ns int64, gp *g, deadline int64) bool {
 	if !casuintptr(&n.key, 0, uintptr(unsafe.Pointer(gp.m))) {
 		// Must be locked (got wakeup).
 		if n.key != locked {
-			gothrow("notetsleep - waitm out of sync")
+			throw("notetsleep - waitm out of sync")
 		}
 		return true
 	}
@@ -228,12 +228,12 @@ func notetsleep_internal(n *note, ns int64, gp *g, deadline int64) bool {
 			// Grab it to avoid getting out of sync.
 			gp.m.blocked = true
 			if semasleep(-1) < 0 {
-				gothrow("runtime: unable to acquire - semaphore out of sync")
+				throw("runtime: unable to acquire - semaphore out of sync")
 			}
 			gp.m.blocked = false
 			return true
 		default:
-			gothrow("runtime: unexpected waitm - semaphore out of sync")
+			throw("runtime: unexpected waitm - semaphore out of sync")
 		}
 	}
 }
@@ -241,7 +241,7 @@ func notetsleep_internal(n *note, ns int64, gp *g, deadline int64) bool {
 func notetsleep(n *note, ns int64) bool {
 	gp := getg()
 	if gp != gp.m.g0 && gp.m.gcing == 0 {
-		gothrow("notetsleep not on g0")
+		throw("notetsleep not on g0")
 	}
 	if gp.m.waitsema == 0 {
 		gp.m.waitsema = semacreate()
@@ -254,7 +254,7 @@ func notetsleep(n *note, ns int64) bool {
 func notetsleepg(n *note, ns int64) bool {
 	gp := getg()
 	if gp == gp.m.g0 {
-		gothrow("notetsleepg on g0")
+		throw("notetsleepg on g0")
 	}
 	if gp.m.waitsema == 0 {
 		gp.m.waitsema = semacreate()

src/runtime/malloc.go

@@ -49,7 +49,7 @@ func mallocgc(size uintptr, typ *_type, flags uint32) unsafe.Pointer {
 	size0 := size
 
 	if flags&flagNoScan == 0 && typ == nil {
-		gothrow("malloc missing type")
+		throw("malloc missing type")
 	}
 
 	// This function must be atomic wrt GC, but for performance reasons
@@ -60,7 +60,7 @@ func mallocgc(size uintptr, typ *_type, flags uint32) unsafe.Pointer {
 	if debugMalloc {
 		mp := acquirem()
 		if mp.mallocing != 0 {
-			gothrow("malloc deadlock")
+			throw("malloc deadlock")
 		}
 		mp.mallocing = 1
 		if mp.curg != nil {
@@ -123,7 +123,7 @@ func mallocgc(size uintptr, typ *_type, flags uint32) unsafe.Pointer {
 					if debugMalloc {
 						mp := acquirem()
 						if mp.mallocing == 0 {
-							gothrow("bad malloc")
+							throw("bad malloc")
 						}
 						mp.mallocing = 0
 						if mp.curg != nil {
@@ -222,7 +222,7 @@ func mallocgc(size uintptr, typ *_type, flags uint32) unsafe.Pointer {
 		shift := (off % wordsPerBitmapByte) * gcBits
 		if debugMalloc && ((*xbits>>shift)&(bitMask|bitPtrMask)) != bitBoundary {
 			println("runtime: bits =", (*xbits>>shift)&(bitMask|bitPtrMask))
-			gothrow("bad bits in markallocated")
+			throw("bad bits in markallocated")
 		}
 
 		var ti, te uintptr
@@ -242,7 +242,7 @@ func mallocgc(size uintptr, typ *_type, flags uint32) unsafe.Pointer {
 			masksize++                                // unroll flag in the beginning
 			if masksize > maxGCMask && typ.gc[1] != 0 {
 				// write barriers have not been updated to deal with this case yet.
-				gothrow("maxGCMask too small for now")
+				throw("maxGCMask too small for now")
 				// If the mask is too large, unroll the program directly
 				// into the GC bitmap. It's 7 times slower than copying
 				// from the pre-unrolled mask, but saves 1/16 of type size
@@ -315,7 +315,7 @@ marked:
 	if debugMalloc {
 		mp := acquirem()
 		if mp.mallocing == 0 {
-			gothrow("bad malloc")
+			throw("bad malloc")
 		}
 		mp.mallocing = 0
 		if mp.curg != nil {
@@ -360,7 +360,7 @@ func loadPtrMask(typ *_type) []uint8 {
 		masksize++                                // unroll flag in the beginning
 		if masksize > maxGCMask && typ.gc[1] != 0 {
 			// write barriers have not been updated to deal with this case yet.
-			gothrow("maxGCMask too small for now")
+			throw("maxGCMask too small for now")
 		}
 		ptrmask = (*uint8)(unsafe.Pointer(uintptr(typ.gc[0])))
 		// Check whether the program is already unrolled
@@ -519,7 +519,7 @@ func gogc(force int32) {
 	}
 
 	if mp != acquirem() {
-		gothrow("gogc: rescheduled")
+		throw("gogc: rescheduled")
 	}
 
 	clearpools()
@@ -738,14 +738,14 @@ func SetFinalizer(obj interface{}, finalizer interface{}) {
 	e := (*eface)(unsafe.Pointer(&obj))
 	etyp := e._type
 	if etyp == nil {
-		gothrow("runtime.SetFinalizer: first argument is nil")
+		throw("runtime.SetFinalizer: first argument is nil")
 	}
 	if etyp.kind&kindMask != kindPtr {
-		gothrow("runtime.SetFinalizer: first argument is " + *etyp._string + ", not pointer")
+		throw("runtime.SetFinalizer: first argument is " + *etyp._string + ", not pointer")
 	}
 	ot := (*ptrtype)(unsafe.Pointer(etyp))
 	if ot.elem == nil {
-		gothrow("nil elem type!")
+		throw("nil elem type!")
 	}
 
 	// find the containing object
@@ -771,14 +771,14 @@ func SetFinalizer(obj interface{}, finalizer interface{}) {
 			uintptr(unsafe.Pointer(&noptrbss)) <= uintptr(e.data) && uintptr(e.data) < uintptr(unsafe.Pointer(&enoptrbss)) {
 			return
 		}
-		gothrow("runtime.SetFinalizer: pointer not in allocated block")
+		throw("runtime.SetFinalizer: pointer not in allocated block")
 	}
 
 	if e.data != base {
 		// As an implementation detail we allow to set finalizers for an inner byte
 		// of an object if it could come from tiny alloc (see mallocgc for details).
 		if ot.elem == nil || ot.elem.kind&kindNoPointers == 0 || ot.elem.size >= maxTinySize {
-			gothrow("runtime.SetFinalizer: pointer not at beginning of allocated block")
+			throw("runtime.SetFinalizer: pointer not at beginning of allocated block")
 		}
 	}
 
@@ -793,12 +793,12 @@ func SetFinalizer(obj interface{}, finalizer interface{}) {
 	}
 
 	if ftyp.kind&kindMask != kindFunc {
-		gothrow("runtime.SetFinalizer: second argument is " + *ftyp._string + ", not a function")
+		throw("runtime.SetFinalizer: second argument is " + *ftyp._string + ", not a function")
 	}
 	ft := (*functype)(unsafe.Pointer(ftyp))
 	ins := *(*[]*_type)(unsafe.Pointer(&ft.in))
 	if ft.dotdotdot || len(ins) != 1 {
-		gothrow("runtime.SetFinalizer: cannot pass " + *etyp._string + " to finalizer " + *ftyp._string)
+		throw("runtime.SetFinalizer: cannot pass " + *etyp._string + " to finalizer " + *ftyp._string)
 	}
 	fint := ins[0]
 	switch {
@@ -821,7 +821,7 @@ func SetFinalizer(obj interface{}, finalizer interface{}) {
 			goto okarg
 		}
 	}
-	gothrow("runtime.SetFinalizer: cannot pass " + *etyp._string + " to finalizer " + *ftyp._string)
+	throw("runtime.SetFinalizer: cannot pass " + *etyp._string + " to finalizer " + *ftyp._string)
 okarg:
 	// compute size needed for return parameters
 	nret := uintptr(0)
@@ -835,7 +835,7 @@ okarg:
 
 	systemstack(func() {
 		if !addfinalizer(e.data, (*funcval)(f.data), nret, fint, ot) {
-			gothrow("runtime.SetFinalizer: finalizer already set")
+			throw("runtime.SetFinalizer: finalizer already set")
 		}
 	})
 }
@@ -933,7 +933,7 @@ func runfinq() {
 				}
 
 				if f.fint == nil {
-					gothrow("missing type in runfinq")
+					throw("missing type in runfinq")
 				}
 				switch f.fint.kind & kindMask {
 				case kindPtr:
@@ -950,7 +950,7 @@ func runfinq() {
 						*(*fInterface)(frame) = assertE2I(ityp, *(*interface{})(frame))
 					}
 				default:
-					gothrow("bad kind in runfinq")
+					throw("bad kind in runfinq")
 				}
 				reflectcall(unsafe.Pointer(f.fn), frame, uint32(framesz), uint32(framesz))
 
@@ -988,10 +988,10 @@ func persistentalloc(size, align uintptr, stat *uint64) unsafe.Pointer {
 
 	if align != 0 {
 		if align&(align-1) != 0 {
-			gothrow("persistentalloc: align is not a power of 2")
+			throw("persistentalloc: align is not a power of 2")
 		}
 		if align > _PageSize {
-			gothrow("persistentalloc: align is too large")
+			throw("persistentalloc: align is too large")
 		}
 	} else {
 		align = 8
@@ -1007,7 +1007,7 @@ func persistentalloc(size, align uintptr, stat *uint64) unsafe.Pointer {
 		persistent.pos = sysAlloc(chunk, &memstats.other_sys)
 		if persistent.pos == nil {
 			unlock(&persistent.lock)
-			gothrow("runtime: cannot allocate memory")
+			throw("runtime: cannot allocate memory")
 		}
 		persistent.end = add(persistent.pos, chunk)
 	}

src/runtime/malloc1.go

@@ -89,7 +89,7 @@ func mallocinit() {
 	initSizes()
 
 	if class_to_size[_TinySizeClass] != _TinySize {
-		gothrow("bad TinySizeClass")
+		throw("bad TinySizeClass")
 	}
 
 	var p, bitmapSize, spansSize, pSize, limit uintptr
@@ -196,7 +196,7 @@ func mallocinit() {
 			}
 		}
 		if p == 0 {
-			gothrow("runtime: cannot reserve arena virtual address space")
+			throw("runtime: cannot reserve arena virtual address space")
 		}
 	}
 
@@ -214,7 +214,7 @@ func mallocinit() {
 
 	if mheap_.arena_start&(_PageSize-1) != 0 {
 		println("bad pagesize", hex(p), hex(p1), hex(spansSize), hex(bitmapSize), hex(_PageSize), "start", hex(mheap_.arena_start))
-		gothrow("misrounded allocation in mallocinit")
+		throw("misrounded allocation in mallocinit")
 	}
 
 	// Initialize the rest of the allocator.
@@ -262,7 +262,7 @@ func mHeap_SysAlloc(h *mheap, n uintptr) unsafe.Pointer {
 		}
 
 		if uintptr(p)&(_PageSize-1) != 0 {
-			gothrow("misrounded allocation in MHeap_SysAlloc")
+			throw("misrounded allocation in MHeap_SysAlloc")
 		}
 		return (unsafe.Pointer)(p)
 	}
@@ -302,7 +302,7 @@ func mHeap_SysAlloc(h *mheap, n uintptr) unsafe.Pointer {
 	}
 
 	if uintptr(p)&(_PageSize-1) != 0 {
-		gothrow("misrounded allocation in MHeap_SysAlloc")
+		throw("misrounded allocation in MHeap_SysAlloc")
 	}
 	return (unsafe.Pointer)(p)
 }
@@ -313,7 +313,7 @@ func largeAlloc(size uintptr, flag uint32) *mspan {
 	// print("largeAlloc size=", size, "\n")
 
 	if size+_PageSize < size {
-		gothrow("out of memory")
+		throw("out of memory")
 	}
 	npages := size >> _PageShift
 	if size&_PageMask != 0 {
@@ -321,7 +321,7 @@ func largeAlloc(size uintptr, flag uint32) *mspan {
 	}
 	s := mHeap_Alloc(&mheap_, npages, 0, true, flag&_FlagNoZero == 0)
 	if s == nil {
-		gothrow("out of memory")
+		throw("out of memory")
 	}
 	s.limit = uintptr(s.start)<<_PageShift + size
 	v := unsafe.Pointer(uintptr(s.start) << _PageShift)

src/runtime/mcache.go

@@ -60,7 +60,7 @@ func mCache_Refill(c *mcache, sizeclass int32) *mspan {
 	// Return the current cached span to the central lists.
 	s := c.alloc[sizeclass]
 	if s.freelist.ptr() != nil {
-		gothrow("refill on a nonempty span")
+		throw("refill on a nonempty span")
 	}
 	if s != &emptymspan {
 		s.incache = false
@@ -69,11 +69,11 @@ func mCache_Refill(c *mcache, sizeclass int32) *mspan {
 	// Get a new cached span from the central lists.
 	s = mCentral_CacheSpan(&mheap_.central[sizeclass].mcentral)
 	if s == nil {
-		gothrow("out of memory")
+		throw("out of memory")
 	}
 	if s.freelist.ptr() == nil {
 		println(s.ref, (s.npages<<_PageShift)/s.elemsize)
-		gothrow("empty span")
+		throw("empty span")
 	}
 	c.alloc[sizeclass] = s
 	_g_.m.locks--

src/runtime/mcentral.go

@@ -88,10 +88,10 @@ havespan:
 	cap := int32((s.npages << _PageShift) / s.elemsize)
 	n := cap - int32(s.ref)
 	if n == 0 {
-		gothrow("empty span")
+		throw("empty span")
 	}
 	if s.freelist.ptr() == nil {
-		gothrow("freelist empty")
+		throw("freelist empty")
 	}
 	s.incache = true
 	return s
@@ -104,7 +104,7 @@ func mCentral_UncacheSpan(c *mcentral, s *mspan) {
 	s.incache = false
 
 	if s.ref == 0 {
-		gothrow("uncaching full span")
+		throw("uncaching full span")
 	}
 
 	cap := int32((s.npages << _PageShift) / s.elemsize)
@@ -124,7 +124,7 @@ func mCentral_UncacheSpan(c *mcentral, s *mspan) {
 // caller takes care of it.
 func mCentral_FreeSpan(c *mcentral, s *mspan, n int32, start gclinkptr, end gclinkptr, preserve bool) bool {
 	if s.incache {
-		gothrow("freespan into cached span")
+		throw("freespan into cached span")
 	}
 
 	// Add the objects back to s's free list.
@@ -137,7 +137,7 @@ func mCentral_FreeSpan(c *mcentral, s *mspan, n int32, start gclinkptr, end gcli
 		// preserve is set only when called from MCentral_CacheSpan above,
 		// the span must be in the empty list.
 		if s.next == nil {
-			gothrow("can't preserve unlinked span")
+			throw("can't preserve unlinked span")
 		}
 		atomicstore(&s.sweepgen, mheap_.sweepgen)
 		return false
@@ -194,7 +194,7 @@ func mCentral_Grow(c *mcentral) *mspan {
 		tail = gclinkptr(p)
 	}
 	if s.freelist.ptr() != nil {
-		gothrow("freelist not empty")
+		throw("freelist not empty")
 	}
 	tail.ptr().next = 0
 	s.freelist = head

src/runtime/mem.go

@@ -69,7 +69,7 @@ func init() {
 	var memStats MemStats
 	if sizeof_C_MStats != unsafe.Sizeof(memStats) {
 		println(sizeof_C_MStats, unsafe.Sizeof(memStats))
-		gothrow("MStats vs MemStatsType size mismatch")
+		throw("MStats vs MemStatsType size mismatch")
 	}
 }
 

src/runtime/mem_bsd.go

@@ -69,20 +69,20 @@ func sysMap(v unsafe.Pointer, n uintptr, reserved bool, stat *uint64) {
 		}
 		p := mmap(v, n, _PROT_READ|_PROT_WRITE, flags, -1, 0)
 		if uintptr(p) == _ENOMEM {
-			gothrow("runtime: out of memory")
+			throw("runtime: out of memory")
 		}
 		if p != v {
 			print("runtime: address space conflict: map(", v, ") = ", p, "\n")
-			gothrow("runtime: address space conflict")
+			throw("runtime: address space conflict")
 		}
 		return
 	}
 
 	p := mmap(v, n, _PROT_READ|_PROT_WRITE, _MAP_ANON|_MAP_FIXED|_MAP_PRIVATE, -1, 0)
 	if uintptr(p) == _ENOMEM {
-		gothrow("runtime: out of memory")
+		throw("runtime: out of memory")
 	}
 	if p != v {
-		gothrow("runtime: cannot map pages in arena address space")
+		throw("runtime: cannot map pages in arena address space")
 	}
 }

src/runtime/mem_darwin.go

@@ -50,9 +50,9 @@ func sysMap(v unsafe.Pointer, n uintptr, reserved bool, stat *uint64) {
 	xadd64(stat, int64(n))
 	p := (unsafe.Pointer)(mmap(v, n, _PROT_READ|_PROT_WRITE, _MAP_ANON|_MAP_FIXED|_MAP_PRIVATE, -1, 0))
 	if uintptr(p) == _ENOMEM {
-		gothrow("runtime: out of memory")
+		throw("runtime: out of memory")
 	}
 	if p != v {
-		gothrow("runtime: cannot map pages in arena address space")
+		throw("runtime: cannot map pages in arena address space")
 	}
 }

src/runtime/mem_linux.go

@@ -116,20 +116,20 @@ func sysMap(v unsafe.Pointer, n uintptr, reserved bool, stat *uint64) {
 	if !reserved {
 		p := mmap_fixed(v, n, _PROT_READ|_PROT_WRITE, _MAP_ANON|_MAP_PRIVATE, -1, 0)
 		if uintptr(p) == _ENOMEM {
-			gothrow("runtime: out of memory")
+			throw("runtime: out of memory")
 		}
 		if p != v {
 			print("runtime: address space conflict: map(", v, ") = ", p, "\n")
-			gothrow("runtime: address space conflict")
+			throw("runtime: address space conflict")
 		}
 		return
 	}
 
 	p := mmap(v, n, _PROT_READ|_PROT_WRITE, _MAP_ANON|_MAP_FIXED|_MAP_PRIVATE, -1, 0)
 	if uintptr(p) == _ENOMEM {
-		gothrow("runtime: out of memory")
+		throw("runtime: out of memory")
 	}
 	if p != v {
-		gothrow("runtime: cannot map pages in arena address space")
+		throw("runtime: cannot map pages in arena address space")
 	}
 }

src/runtime/mem_windows.go

@@ -56,7 +56,7 @@ func sysUnused(v unsafe.Pointer, n uintptr) {
 			small &^= 4096 - 1
 		}
 		if small < 4096 {
-			gothrow("runtime: failed to decommit pages")
+			throw("runtime: failed to decommit pages")
 		}
 		v = add(v, small)
 		n -= small
@@ -66,7 +66,7 @@ func sysUnused(v unsafe.Pointer, n uintptr) {
 func sysUsed(v unsafe.Pointer, n uintptr) {
 	r := stdcall4(_VirtualAlloc, uintptr(v), n, _MEM_COMMIT, _PAGE_READWRITE)
 	if r != uintptr(v) {
-		gothrow("runtime: failed to commit pages")
+		throw("runtime: failed to commit pages")
 	}
 
 	// Commit failed. See SysUnused.
@@ -77,7 +77,7 @@ func sysUsed(v unsafe.Pointer, n uintptr) {
 			small &^= 4096 - 1
 		}
 		if small < 4096 {
-			gothrow("runtime: failed to decommit pages")
+			throw("runtime: failed to decommit pages")
 		}
 		v = add(v, small)
 		n -= small
@@ -88,7 +88,7 @@ func sysFree(v unsafe.Pointer, n uintptr, stat *uint64) {
 	xadd64(stat, -int64(n))
 	r := stdcall3(_VirtualFree, uintptr(v), 0, _MEM_RELEASE)
 	if r == 0 {
-		gothrow("runtime: failed to release pages")
+		throw("runtime: failed to release pages")
 	}
 }
 
@@ -114,6 +114,6 @@ func sysMap(v unsafe.Pointer, n uintptr, reserved bool, stat *uint64) {
 	xadd64(stat, int64(n))
 	p := stdcall4(_VirtualAlloc, uintptr(v), n, _MEM_COMMIT, _PAGE_READWRITE)
 	if p != uintptr(v) {
-		gothrow("runtime: cannot map pages in arena address space")
+		throw("runtime: cannot map pages in arena address space")
 	}
 }

src/runtime/mfixalloc.go

@@ -26,7 +26,7 @@ func fixAlloc_Init(f *fixalloc, size uintptr, first func(unsafe.Pointer, unsafe.
 func fixAlloc_Alloc(f *fixalloc) unsafe.Pointer {
 	if f.size == 0 {
 		print("runtime: use of FixAlloc_Alloc before FixAlloc_Init\n")
-		gothrow("runtime: internal error")
+		throw("runtime: internal error")
 	}
 
 	if f.list != nil {

src/runtime/mgc0.go

@@ -127,7 +127,7 @@ func writebarrierptr_nostore(dst *uintptr, src uintptr) {
 	}
 
 	if src != 0 && (src < _PageSize || src == _PoisonGC || src == _PoisonStack) {
-		systemstack(func() { gothrow("bad pointer in write barrier") })
+		systemstack(func() { throw("bad pointer in write barrier") })
 	}
 
 	mp := acquirem()

src/runtime/mheap.go

@@ -31,7 +31,7 @@ func recordspan(vh unsafe.Pointer, p unsafe.Pointer) {
 		sp := (*slice)(unsafe.Pointer(&new))
 		sp.array = (*byte)(sysAlloc(uintptr(n)*ptrSize, &memstats.other_sys))
 		if sp.array == nil {
-			gothrow("runtime: cannot allocate memory")
+			throw("runtime: cannot allocate memory")
 		}
 		sp.len = uint(len(h_allspans))
 		sp.cap = uint(n)
@@ -174,7 +174,7 @@ func mHeap_Reclaim(h *mheap, npage uintptr) {
 func mHeap_Alloc_m(h *mheap, npage uintptr, sizeclass int32, large bool) *mspan {
 	_g_ := getg()
 	if _g_ != _g_.m.g0 {
-		gothrow("_mheap_alloc not on g0 stack")
+		throw("_mheap_alloc not on g0 stack")
 	}
 	lock(&h.lock)
 
@@ -242,7 +242,7 @@ func mHeap_Alloc(h *mheap, npage uintptr, sizeclass int32, large bool, needzero
 func mHeap_AllocStack(h *mheap, npage uintptr) *mspan {
 	_g_ := getg()
 	if _g_ != _g_.m.g0 {
-		gothrow("mheap_allocstack not on g0 stack")
+		throw("mheap_allocstack not on g0 stack")
 	}
 	lock(&h.lock)
 	s := mHeap_AllocSpanLocked(h, npage)
@@ -285,14 +285,14 @@ func mHeap_AllocSpanLocked(h *mheap, npage uintptr) *mspan {
 HaveSpan:
 	// Mark span in use.
 	if s.state != _MSpanFree {
-		gothrow("MHeap_AllocLocked - MSpan not free")
+		throw("MHeap_AllocLocked - MSpan not free")
 	}
 	if s.npages < npage {
-		gothrow("MHeap_AllocLocked - bad npages")
+		throw("MHeap_AllocLocked - bad npages")
 	}
 	mSpanList_Remove(s)
 	if s.next != nil || s.prev != nil {
-		gothrow("still in list")
+		throw("still in list")
 	}
 	if s.npreleased > 0 {
 		sysUsed((unsafe.Pointer)(s.start<<_PageShift), s.npages<<_PageShift)
@@ -332,7 +332,7 @@ HaveSpan:
 
 	//println("spanalloc", hex(s.start<<_PageShift))
 	if s.next != nil || s.prev != nil {
-		gothrow("still in list")
+		throw("still in list")
 	}
 	return s
 }
@@ -447,7 +447,7 @@ func mHeap_Free(h *mheap, s *mspan, acct int32) {
 func mHeap_FreeStack(h *mheap, s *mspan) {
 	_g_ := getg()
 	if _g_ != _g_.m.g0 {
-		gothrow("mheap_freestack not on g0 stack")
+		throw("mheap_freestack not on g0 stack")
 	}
 	s.needzero = 1
 	lock(&h.lock)
@@ -460,15 +460,15 @@ func mHeap_FreeSpanLocked(h *mheap, s *mspan, acctinuse, acctidle bool) {
 	switch s.state {
 	case _MSpanStack:
 		if s.ref != 0 {
-			gothrow("MHeap_FreeSpanLocked - invalid stack free")
+			throw("MHeap_FreeSpanLocked - invalid stack free")
 		}
 	case _MSpanInUse:
 		if s.ref != 0 || s.sweepgen != h.sweepgen {
 			print("MHeap_FreeSpanLocked - span ", s, " ptr ", hex(s.start<<_PageShift), " ref ", s.ref, " sweepgen ", s.sweepgen, "/", h.sweepgen, "\n")
-			gothrow("MHeap_FreeSpanLocked - invalid free")
+			throw("MHeap_FreeSpanLocked - invalid free")
 		}
 	default:
-		gothrow("MHeap_FreeSpanLocked - invalid span state")
+		throw("MHeap_FreeSpanLocked - invalid span state")
 	}
 
 	if acctinuse {
@@ -608,7 +608,7 @@ func mSpanList_IsEmpty(list *mspan) bool {
 func mSpanList_Insert(list *mspan, span *mspan) {
 	if span.next != nil || span.prev != nil {
 		println("failed MSpanList_Insert", span, span.next, span.prev)
-		gothrow("MSpanList_Insert")
+		throw("MSpanList_Insert")
 	}
 	span.next = list.next
 	span.prev = list
@@ -619,7 +619,7 @@ func mSpanList_Insert(list *mspan, span *mspan) {
 func mSpanList_InsertBack(list *mspan, span *mspan) {
 	if span.next != nil || span.prev != nil {
 		println("failed MSpanList_InsertBack", span, span.next, span.prev)
-		gothrow("MSpanList_InsertBack")
+		throw("MSpanList_InsertBack")
 	}
 	span.next = list
 	span.prev = list.prev
@@ -636,7 +636,7 @@ func mSpanList_InsertBack(list *mspan, span *mspan) {
 func addspecial(p unsafe.Pointer, s *special) bool {
 	span := mHeap_LookupMaybe(&mheap_, p)
 	if span == nil {
-		gothrow("addspecial on invalid pointer")
+		throw("addspecial on invalid pointer")
 	}
 
 	// Ensure that the span is swept.
@@ -683,7 +683,7 @@ func addspecial(p unsafe.Pointer, s *special) bool {
 func removespecial(p unsafe.Pointer, kind uint8) *special {
 	span := mHeap_LookupMaybe(&mheap_, p)
 	if span == nil {
-		gothrow("removespecial on invalid pointer")
+		throw("removespecial on invalid pointer")
 	}
 
 	// Ensure that the span is swept.
@@ -755,7 +755,7 @@ func setprofilebucket(p unsafe.Pointer, b *bucket) {
 	s.special.kind = _KindSpecialProfile
 	s.b = b
 	if !addspecial(p, &s.special) {
-		gothrow("setprofilebucket: profile already set")
+		throw("setprofilebucket: profile already set")
 	}
 }
 
@@ -779,7 +779,7 @@ func freespecial(s *special, p unsafe.Pointer, size uintptr, freed bool) bool {
 		unlock(&mheap_.speciallock)
 		return true
 	default:
-		gothrow("bad special kind")
+		throw("bad special kind")
 		panic("not reached")
 	}
 }

src/runtime/mprof.go

@@ -100,7 +100,7 @@ func newBucket(typ bucketType, nstk int) *bucket {
 	size := unsafe.Sizeof(bucket{}) + uintptr(nstk)*unsafe.Sizeof(uintptr(0))
 	switch typ {
 	default:
-		gothrow("invalid profile bucket type")
+		throw("invalid profile bucket type")
 	case memProfile:
 		size += unsafe.Sizeof(memRecord{})
 	case blockProfile:
@@ -123,7 +123,7 @@ func (b *bucket) stk() []uintptr {
 // mp returns the memRecord associated with the memProfile bucket b.
 func (b *bucket) mp() *memRecord {
 	if b.typ != memProfile {
-		gothrow("bad use of bucket.mp")
+		throw("bad use of bucket.mp")
 	}
 	data := add(unsafe.Pointer(b), unsafe.Sizeof(*b)+b.nstk*unsafe.Sizeof(uintptr(0)))
 	return (*memRecord)(data)
@@ -132,7 +132,7 @@ func (b *bucket) mp() *memRecord {
 // bp returns the blockRecord associated with the blockProfile bucket b.
 func (b *bucket) bp() *blockRecord {
 	if b.typ != blockProfile {
-		gothrow("bad use of bucket.bp")
+		throw("bad use of bucket.bp")
 	}
 	data := add(unsafe.Pointer(b), unsafe.Sizeof(*b)+b.nstk*unsafe.Sizeof(uintptr(0)))
 	return (*blockRecord)(data)
@@ -143,7 +143,7 @@ func stkbucket(typ bucketType, size uintptr, stk []uintptr, alloc bool) *bucket
 	if buckhash == nil {
 		buckhash = (*[buckHashSize]*bucket)(sysAlloc(unsafe.Sizeof(*buckhash), &memstats.buckhash_sys))
 		if buckhash == nil {
-			gothrow("runtime: cannot allocate memory")
+			throw("runtime: cannot allocate memory")
 		}
 	}
 

src/runtime/msize.go

@@ -43,7 +43,7 @@ package runtime
 
 func sizeToClass(size int32) int32 {
 	if size > _MaxSmallSize {
-		gothrow("SizeToClass - invalid size")
+		throw("SizeToClass - invalid size")
 	}
 	if size > 1024-8 {
 		return int32(size_to_class128[(size-1024+127)>>7])
@@ -67,7 +67,7 @@ func initSizes() {
 			}
 		}
 		if align&(align-1) != 0 {
-			gothrow("InitSizes - bug")
+			throw("InitSizes - bug")
 		}
 
 		// Make the allocnpages big enough that
@@ -95,7 +95,7 @@ func initSizes() {
 	}
 	if sizeclass != _NumSizeClasses {
 		print("sizeclass=", sizeclass, " NumSizeClasses=", _NumSizeClasses, "\n")
-		gothrow("InitSizes - bad NumSizeClasses")
+		throw("InitSizes - bad NumSizeClasses")
 	}
 
 	// Initialize the size_to_class tables.
@@ -155,7 +155,7 @@ dump:
 		}
 		print("\n")
 	}
-	gothrow("InitSizes failed")
+	throw("InitSizes failed")
 }
 
 // Returns size of the memory block that mallocgc will allocate if you ask for the size.

src/runtime/netpoll.go

@@ -81,10 +81,10 @@ func net_runtime_pollOpen(fd uintptr) (*pollDesc, int) {
 	pd := pollcache.alloc()
 	lock(&pd.lock)
 	if pd.wg != 0 && pd.wg != pdReady {
-		gothrow("netpollOpen: blocked write on free descriptor")
+		throw("netpollOpen: blocked write on free descriptor")
 	}
 	if pd.rg != 0 && pd.rg != pdReady {
-		gothrow("netpollOpen: blocked read on free descriptor")
+		throw("netpollOpen: blocked read on free descriptor")
 	}
 	pd.fd = fd
 	pd.closing = false
@@ -103,13 +103,13 @@ func net_runtime_pollOpen(fd uintptr) (*pollDesc, int) {
 //go:linkname net_runtime_pollClose net.runtime_pollClose
 func net_runtime_pollClose(pd *pollDesc) {
 	if !pd.closing {
-		gothrow("netpollClose: close w/o unblock")
+		throw("netpollClose: close w/o unblock")
 	}
 	if pd.wg != 0 && pd.wg != pdReady {
-		gothrow("netpollClose: blocked write on closing descriptor")
+		throw("netpollClose: blocked write on closing descriptor")
 	}
 	if pd.rg != 0 && pd.rg != pdReady {
-		gothrow("netpollClose: blocked read on closing descriptor")
+		throw("netpollClose: blocked read on closing descriptor")
 	}
 	netpollclose(uintptr(pd.fd))
 	pollcache.free(pd)
@@ -240,7 +240,7 @@ func net_runtime_pollSetDeadline(pd *pollDesc, d int64, mode int) {
 func net_runtime_pollUnblock(pd *pollDesc) {
 	lock(&pd.lock)
 	if pd.closing {
-		gothrow("netpollUnblock: already closing")
+		throw("netpollUnblock: already closing")
 	}
 	pd.closing = true
 	pd.seq++
@@ -314,7 +314,7 @@ func netpollblock(pd *pollDesc, mode int32, waitio bool) bool {
 			return true
 		}
 		if old != 0 {
-			gothrow("netpollblock: double wait")
+			throw("netpollblock: double wait")
 		}
 		if casuintptr(gpp, 0, pdWait) {
 			break
@@ -330,7 +330,7 @@ func netpollblock(pd *pollDesc, mode int32, waitio bool) bool {
 	// be careful to not lose concurrent READY notification
 	old := xchguintptr(gpp, 0)
 	if old > pdWait {
-		gothrow("netpollblock: corrupted state")
+		throw("netpollblock: corrupted state")
 	}
 	return old == pdReady
 }
@@ -376,7 +376,7 @@ func netpolldeadlineimpl(pd *pollDesc, seq uintptr, read, write bool) {
 	var rg *g
 	if read {
 		if pd.rd <= 0 || pd.rt.f == nil {
-			gothrow("netpolldeadlineimpl: inconsistent read deadline")
+			throw("netpolldeadlineimpl: inconsistent read deadline")
 		}
 		pd.rd = -1
 		atomicstorep(unsafe.Pointer(&pd.rt.f), nil) // full memory barrier between store to rd and load of rg in netpollunblock
@@ -385,7 +385,7 @@ func netpolldeadlineimpl(pd *pollDesc, seq uintptr, read, write bool) {
 	var wg *g
 	if write {
 		if pd.wd <= 0 || pd.wt.f == nil && !read {
-			gothrow("netpolldeadlineimpl: inconsistent write deadline")
+			throw("netpolldeadlineimpl: inconsistent write deadline")
 		}
 		pd.wd = -1
 		atomicstorep(unsafe.Pointer(&pd.wt.f), nil) // full memory barrier between store to wd and load of wg in netpollunblock

src/runtime/netpoll_epoll.go

@@ -34,7 +34,7 @@ func netpollinit() {
 		return
 	}
 	println("netpollinit: failed to create epoll descriptor", -epfd)
-	gothrow("netpollinit: failed to create descriptor")
+	throw("netpollinit: failed to create descriptor")
 }
 
 func netpollopen(fd uintptr, pd *pollDesc) int32 {
@@ -50,7 +50,7 @@ func netpollclose(fd uintptr) int32 {
 }
 
 func netpollarm(pd *pollDesc, mode int) {
-	gothrow("unused")
+	throw("unused")
 }
 
 // polls for ready network connections

src/runtime/netpoll_kqueue.go

@@ -25,7 +25,7 @@ func netpollinit() {
 	kq = kqueue()
 	if kq < 0 {
 		println("netpollinit: kqueue failed with", -kq)
-		gothrow("netpollinit: kqueue failed")
+		throw("netpollinit: kqueue failed")
 	}
 	closeonexec(kq)
 }
@@ -57,7 +57,7 @@ func netpollclose(fd uintptr) int32 {
 }
 
 func netpollarm(pd *pollDesc, mode int) {
-	gothrow("unused")
+	throw("unused")
 }
 
 // Polls for ready network connections.

src/runtime/netpoll_solaris.go

@@ -118,7 +118,7 @@ func netpollinit() {
 	}
 
 	print("netpollinit: failed to create port (", errno(), ")\n")
-	gothrow("netpollinit: failed to create port")
+	throw("netpollinit: failed to create port")
 }
 
 func netpollopen(fd uintptr, pd *pollDesc) int32 {
@@ -155,7 +155,7 @@ func netpollupdate(pd *pollDesc, set, clear uint32) {
 
 	if events != 0 && port_associate(portfd, _PORT_SOURCE_FD, pd.fd, events, uintptr(unsafe.Pointer(pd))) != 0 {
 		print("netpollupdate: failed to associate (", errno(), ")\n")
-		gothrow("netpollupdate: failed to associate")
+		throw("netpollupdate: failed to associate")
 	}
 	pd.user = events
 }
@@ -169,7 +169,7 @@ func netpollarm(pd *pollDesc, mode int) {
 	case 'w':
 		netpollupdate(pd, _POLLOUT, 0)
 	default:
-		gothrow("netpollarm: bad mode")
+		throw("netpollarm: bad mode")
 	}
 	unlock(&pd.lock)
 }

src/runtime/netpoll_windows.go

@@ -46,7 +46,7 @@ func netpollinit() {
 	iocphandle = uintptr(stdcall4(_CreateIoCompletionPort, _INVALID_HANDLE_VALUE, 0, 0, _DWORD_MAX))
 	if iocphandle == 0 {
 		println("netpoll: failed to create iocp handle (errno=", getlasterror(), ")")
-		gothrow("netpoll: failed to create iocp handle")
+		throw("netpoll: failed to create iocp handle")
 	}
 }
 
@@ -63,7 +63,7 @@ func netpollclose(fd uintptr) int32 {
 }
 
 func netpollarm(pd *pollDesc, mode int) {
-	gothrow("unused")
+	throw("unused")
 }
 
 // Polls for completed network IO.
@@ -101,7 +101,7 @@ retry:
 				return nil
 			}
 			println("netpoll: GetQueuedCompletionStatusEx failed (errno=", errno, ")")
-			gothrow("netpoll: GetQueuedCompletionStatusEx failed")
+			throw("netpoll: GetQueuedCompletionStatusEx failed")
 		}
 		mp.blocked = false
 		for i = 0; i < n; i++ {
@@ -128,7 +128,7 @@ retry:
 			}
 			if op == nil {
 				println("netpoll: GetQueuedCompletionStatus failed (errno=", errno, ")")
-				gothrow("netpoll: GetQueuedCompletionStatus failed")
+				throw("netpoll: GetQueuedCompletionStatus failed")
 			}
 			// dequeued failed IO packet, so report that
 		}
@@ -143,12 +143,12 @@ retry:
 
 func handlecompletion(gpp **g, op *net_op, errno int32, qty uint32) {
 	if op == nil {
-		gothrow("netpoll: GetQueuedCompletionStatus returned op == nil")
+		throw("netpoll: GetQueuedCompletionStatus returned op == nil")
 	}
 	mode := op.mode
 	if mode != 'r' && mode != 'w' {
 		println("netpoll: GetQueuedCompletionStatus returned invalid mode=", mode)
-		gothrow("netpoll: GetQueuedCompletionStatus returned invalid mode")
+		throw("netpoll: GetQueuedCompletionStatus returned invalid mode")
 	}
 	op.errno = errno
 	op.qty = qty

src/runtime/os1_darwin.go

@@ -64,9 +64,9 @@ func goenvs() {
 	if !iscgo {
 		if bsdthread_register() != 0 {
 			if gogetenv("DYLD_INSERT_LIBRARIES") != "" {
-				gothrow("runtime: bsdthread_register error (unset DYLD_INSERT_LIBRARIES)")
+				throw("runtime: bsdthread_register error (unset DYLD_INSERT_LIBRARIES)")
 			}
-			gothrow("runtime: bsdthread_register error")
+			throw("runtime: bsdthread_register error")
 		}
 	}
 }
@@ -84,7 +84,7 @@ func newosproc(mp *m, stk unsafe.Pointer) {
 
 	if errno < 0 {
 		print("runtime: failed to create new OS thread (have ", mcount(), " already; errno=", -errno, ")\n")
-		gothrow("runtime.newosproc")
+		throw("runtime.newosproc")
 	}
 }
 
@@ -114,7 +114,7 @@ func unminit() {
 
 func macherror(r int32, fn string) {
 	print("mach error ", fn, ": ", r, "\n")
-	gothrow("mach error")
+	throw("mach error")
 }
 
 const _DebugMach = false
@@ -395,7 +395,7 @@ func setsig(i int32, fn uintptr, restart bool) {
 }
 
 func setsigstack(i int32) {
-	gothrow("setsigstack")
+	throw("setsigstack")
 }
 
 func getsig(i int32) uintptr {

src/runtime/os1_dragonfly.go

@@ -190,7 +190,7 @@ func setsig(i int32, fn uintptr, restart bool) {
 }
 
 func setsigstack(i int32) {
-	gothrow("setsigstack")
+	throw("setsigstack")
 }
 
 func getsig(i int32) uintptr {

src/runtime/os1_freebsd.go

@@ -192,7 +192,7 @@ func setsig(i int32, fn uintptr, restart bool) {
 }
 
 func setsigstack(i int32) {
-	gothrow("setsigstack")
+	throw("setsigstack")
 }
 
 func getsig(i int32) uintptr {

src/runtime/os1_linux.go

@@ -137,7 +137,7 @@ func newosproc(mp *m, stk unsafe.Pointer) {
 
 	if ret < 0 {
 		print("runtime: failed to create new OS thread (have ", mcount(), " already; errno=", -ret, ")\n")
-		gothrow("newosproc")
+		throw("newosproc")
 	}
 }
 
@@ -242,21 +242,21 @@ func setsig(i int32, fn uintptr, restart bool) {
 	}
 	sa.sa_handler = fn
 	if rt_sigaction(uintptr(i), &sa, nil, unsafe.Sizeof(sa.sa_mask)) != 0 {
-		gothrow("rt_sigaction failure")
+		throw("rt_sigaction failure")
 	}
 }
 
 func setsigstack(i int32) {
 	var sa sigactiont
 	if rt_sigaction(uintptr(i), nil, &sa, unsafe.Sizeof(sa.sa_mask)) != 0 {
-		gothrow("rt_sigaction failure")
+		throw("rt_sigaction failure")
 	}
 	if sa.sa_handler == 0 || sa.sa_handler == _SIG_DFL || sa.sa_handler == _SIG_IGN || sa.sa_flags&_SA_ONSTACK != 0 {
 		return
 	}
 	sa.sa_flags |= _SA_ONSTACK
 	if rt_sigaction(uintptr(i), &sa, nil, unsafe.Sizeof(sa.sa_mask)) != 0 {
-		gothrow("rt_sigaction failure")
+		throw("rt_sigaction failure")
 	}
 }
 
@@ -265,7 +265,7 @@ func getsig(i int32) uintptr {
 
 	memclr(unsafe.Pointer(&sa), unsafe.Sizeof(sa))
 	if rt_sigaction(uintptr(i), nil, &sa, unsafe.Sizeof(sa.sa_mask)) != 0 {
-		gothrow("rt_sigaction read failure")
+		throw("rt_sigaction read failure")
 	}
 	if sa.sa_handler == funcPC(sigtramp) {
 		return funcPC(sighandler)

src/runtime/os1_nacl.go

@@ -77,7 +77,7 @@ func newosproc(mp *m, stk unsafe.Pointer) {
 	ret := nacl_thread_create(funcPC(mstart_nacl), stk, unsafe.Pointer(&tls[2]), nil)
 	if ret < 0 {
 		print("nacl_thread_create: error ", -ret, "\n")
-		gothrow("newosproc")
+		throw("newosproc")
 	}
 }
 
@@ -88,12 +88,12 @@ func semacreate() uintptr {
 		mu := nacl_mutex_create(0)
 		if mu < 0 {
 			print("nacl_mutex_create: error ", -mu, "\n")
-			gothrow("semacreate")
+			throw("semacreate")
 		}
 		c := nacl_cond_create(0)
 		if c < 0 {
 			print("nacl_cond_create: error ", -cond, "\n")
-			gothrow("semacreate")
+			throw("semacreate")
 		}
 		cond = uintptr(c)
 		_g_ := getg()
@@ -109,13 +109,13 @@ func semasleep(ns int64) int32 {
 	systemstack(func() {
 		_g_ := getg()
 		if nacl_mutex_lock(int32(_g_.m.waitsemalock)) < 0 {
-			gothrow("semasleep")
+			throw("semasleep")
 		}
 
 		for _g_.m.waitsemacount == 0 {
 			if ns < 0 {
 				if nacl_cond_wait(int32(_g_.m.waitsema), int32(_g_.m.waitsemalock)) < 0 {
-					gothrow("semasleep")
+					throw("semasleep")
 				}
 			} else {
 				var ts timespec
@@ -129,7 +129,7 @@ func semasleep(ns int64) int32 {
 					return
 				}
 				if r < 0 {
-					gothrow("semasleep")
+					throw("semasleep")
 				}
 			}
 		}
@@ -145,10 +145,10 @@ func semasleep(ns int64) int32 {
 func semawakeup(mp *m) {
 	systemstack(func() {
 		if nacl_mutex_lock(int32(mp.waitsemalock)) < 0 {
-			gothrow("semawakeup")
+			throw("semawakeup")
 		}
 		if mp.waitsemacount != 0 {
-			gothrow("semawakeup")
+			throw("semawakeup")
 		}
 		mp.waitsemacount = 1
 		nacl_cond_signal(int32(mp.waitsema))

src/runtime/os1_netbsd.go

@@ -162,7 +162,7 @@ func newosproc(mp *m, stk unsafe.Pointer) {
 	ret := lwp_create(unsafe.Pointer(&uc), 0, unsafe.Pointer(&mp.procid))
 	if ret < 0 {
 		print("runtime: failed to create new OS thread (have ", mcount()-1, " already; errno=", -ret, ")\n")
-		gothrow("runtime.newosproc")
+		throw("runtime.newosproc")
 	}
 }
 
@@ -234,7 +234,7 @@ func setsig(i int32, fn uintptr, restart bool) {
 }
 
 func setsigstack(i int32) {
-	gothrow("setsigstack")
+	throw("setsigstack")
 }
 
 func getsig(i int32) uintptr {

src/runtime/os1_openbsd.go

@@ -130,7 +130,7 @@ func newosproc(mp *m, stk unsafe.Pointer) {
 		if ret == -ENOTSUP {
 			print("runtime: is kern.rthreads disabled?\n")
 		}
-		gothrow("runtime.newosproc")
+		throw("runtime.newosproc")
 	}
 }
 
@@ -204,7 +204,7 @@ func setsig(i int32, fn uintptr, restart bool) {
 }
 
 func setsigstack(i int32) {
-	gothrow("setsigstack")
+	throw("setsigstack")
 }
 
 func getsig(i int32) uintptr {

src/runtime/os1_plan9.go

@@ -194,7 +194,7 @@ func newosproc(mp *m, stk unsafe.Pointer) {
 	}
 	pid := rfork(_RFPROC | _RFMEM | _RFNOWAIT)
 	if pid < 0 {
-		gothrow("newosproc: rfork failed")
+		throw("newosproc: rfork failed")
 	}
 	if pid == 0 {
 		tstart_plan9(mp)

src/runtime/os1_windows.go

@@ -246,7 +246,7 @@ func newosproc(mp *m, stk unsafe.Pointer) {
 		_STACK_SIZE_PARAM_IS_A_RESERVATION, 0)
 	if thandle == 0 {
 		println("runtime: failed to create new OS thread (have ", mcount(), " already; errno=", getlasterror(), ")")
-		gothrow("runtime.newosproc")
+		throw("runtime.newosproc")
 	}
 }
 
@@ -300,7 +300,7 @@ func systime(addr uintptr) int64 {
 		}
 	}
 	systemstack(func() {
-		gothrow("interrupt/system time is changing too fast")
+		throw("interrupt/system time is changing too fast")
 	})
 	return 0
 }

src/runtime/os3_solaris.go

@@ -141,17 +141,17 @@ func newosproc(mp *m, _ unsafe.Pointer) {
 	)
 
 	if pthread_attr_init(&attr) != 0 {
-		gothrow("pthread_attr_init")
+		throw("pthread_attr_init")
 	}
 	if pthread_attr_setstack(&attr, 0, 0x200000) != 0 {
-		gothrow("pthread_attr_setstack")
+		throw("pthread_attr_setstack")
 	}
 	if pthread_attr_getstack(&attr, unsafe.Pointer(&mp.g0.stack.hi), &size) != 0 {
-		gothrow("pthread_attr_getstack")
+		throw("pthread_attr_getstack")
 	}
 	mp.g0.stack.lo = mp.g0.stack.hi - uintptr(size)
 	if pthread_attr_setdetachstate(&attr, _PTHREAD_CREATE_DETACHED) != 0 {
-		gothrow("pthread_attr_setdetachstate")
+		throw("pthread_attr_setdetachstate")
 	}
 
 	// Disable signals during create, so that the new thread starts
@@ -161,7 +161,7 @@ func newosproc(mp *m, _ unsafe.Pointer) {
 	sigprocmask(_SIG_SETMASK, &oset, nil)
 	if ret != 0 {
 		print("runtime: failed to create new OS thread (have ", mcount(), " already; errno=", ret, ")\n")
-		gothrow("newosproc")
+		throw("newosproc")
 	}
 }
 
@@ -253,7 +253,7 @@ func setsig(i int32, fn uintptr, restart bool) {
 }
 
 func setsigstack(i int32) {
-	gothrow("setsigstack")
+	throw("setsigstack")
 }
 
 func getsig(i int32) uintptr {
@@ -296,7 +296,7 @@ func semacreate() uintptr {
 	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&_g_.m.libcall))
 	sem = (*semt)(unsafe.Pointer(_g_.m.libcall.r1))
 	if sem_init(sem, 0, 0) != 0 {
-		gothrow("sem_init")
+		throw("sem_init")
 	}
 	return uintptr(unsafe.Pointer(sem))
 }
@@ -319,7 +319,7 @@ func semasleep(ns int64) int32 {
 			if *_m_.perrno == _ETIMEDOUT || *_m_.perrno == _EAGAIN || *_m_.perrno == _EINTR {
 				return -1
 			}
-			gothrow("sem_reltimedwait_np")
+			throw("sem_reltimedwait_np")
 		}
 		return 0
 	}
@@ -336,7 +336,7 @@ func semasleep(ns int64) int32 {
 		if *_m_.perrno == _EINTR {
 			continue
 		}
-		gothrow("sem_wait")
+		throw("sem_wait")
 	}
 	return 0
 }
@@ -344,7 +344,7 @@ func semasleep(ns int64) int32 {
 //go:nosplit
 func semawakeup(mp *m) {
 	if sem_post((*semt)(unsafe.Pointer(mp.waitsema))) != 0 {
-		gothrow("sem_post")
+		throw("sem_post")
 	}
 }
 

src/runtime/os_nacl.go

@@ -36,13 +36,13 @@ func write(fd uintptr, p unsafe.Pointer, n int32) int32
 
 //go:linkname os_sigpipe os.sigpipe
 func os_sigpipe() {
-	gothrow("too many writes on closed pipe")
+	throw("too many writes on closed pipe")
 }
 
 func sigpanic() {
 	g := getg()
 	if !canpanic(g) {
-		gothrow("unexpected signal during runtime execution")
+		throw("unexpected signal during runtime execution")
 	}
 
 	// Native Client only invokes the exception handler for memory faults.

src/runtime/os_plan9.go

@@ -55,13 +55,13 @@ type _Plink uintptr
 
 //go:linkname os_sigpipe os.sigpipe
 func os_sigpipe() {
-	gothrow("too many writes on closed pipe")
+	throw("too many writes on closed pipe")
 }
 
 func sigpanic() {
 	g := getg()
 	if !canpanic(g) {
-		gothrow("unexpected signal during runtime execution")
+		throw("unexpected signal during runtime execution")
 	}
 
 	note := gostringnocopy((*byte)(unsafe.Pointer(g.m.notesig)))
@@ -73,12 +73,12 @@ func sigpanic() {
 			panicmem()
 		}
 		print("unexpected fault address ", hex(g.sigcode1), "\n")
-		gothrow("fault")
+		throw("fault")
 	case _SIGTRAP:
 		if g.paniconfault {
 			panicmem()
 		}
-		gothrow(note)
+		throw(note)
 	case _SIGINTDIV:
 		panicdivide()
 	case _SIGFLOAT:

src/runtime/os_windows.go

@@ -10,13 +10,13 @@ type stdFunction *byte
 
 //go:linkname os_sigpipe os.sigpipe
 func os_sigpipe() {
-	gothrow("too many writes on closed pipe")
+	throw("too many writes on closed pipe")
 }
 
 func sigpanic() {
 	g := getg()
 	if !canpanic(g) {
-		gothrow("unexpected signal during runtime execution")
+		throw("unexpected signal during runtime execution")
 	}
 
 	switch uint32(g.sig) {
@@ -25,7 +25,7 @@ func sigpanic() {
 			panicmem()
 		}
 		print("unexpected fault address ", hex(g.sigcode1), "\n")
-		gothrow("fault")
+		throw("fault")
 	case _EXCEPTION_INT_DIVIDE_BY_ZERO:
 		panicdivide()
 	case _EXCEPTION_INT_OVERFLOW:
@@ -37,5 +37,5 @@ func sigpanic() {
 		_EXCEPTION_FLT_UNDERFLOW:
 		panicfloat()
 	}
-	gothrow("fault")
+	throw("fault")
 }

src/runtime/panic.go

@@ -43,11 +43,11 @@ func panicmem() {
 }
 
 func throwreturn() {
-	gothrow("no return at end of a typed function - compiler is broken")
+	throw("no return at end of a typed function - compiler is broken")
 }
 
 func throwinit() {
-	gothrow("recursive call during initialization - linker skew")
+	throw("recursive call during initialization - linker skew")
 }
 
 // Create a new deferred function fn with siz bytes of arguments.
@@ -56,7 +56,7 @@ func throwinit() {
 func deferproc(siz int32, fn *funcval) { // arguments of fn follow fn
 	if getg().m.curg != getg() {
 		// go code on the system stack can't defer
-		gothrow("defer on system stack")
+		throw("defer on system stack")
 	}
 
 	// the arguments of fn are in a perilous state.  The stack map
@@ -71,7 +71,7 @@ func deferproc(siz int32, fn *funcval) { // arguments of fn follow fn
 	systemstack(func() {
 		d := newdefer(siz)
 		if d._panic != nil {
-			gothrow("deferproc: d.panic != nil after newdefer")
+			throw("deferproc: d.panic != nil after newdefer")
 		}
 		d.fn = fn
 		d.pc = callerpc
@@ -137,7 +137,7 @@ func testdefersizes() {
 		}
 		if m[defersc] != int32(siz) {
 			print("bad defer size class: i=", i, " siz=", siz, " defersc=", defersc, "\n")
-			gothrow("bad defer size class")
+			throw("bad defer size class")
 		}
 	}
 }
@@ -209,12 +209,12 @@ func freedefer(d *_defer) {
 // Windows otherwise runs out of stack space.
 func freedeferpanic() {
 	// _panic must be cleared before d is unlinked from gp.
-	gothrow("freedefer with d._panic != nil")
+	throw("freedefer with d._panic != nil")
 }
 
 func freedeferfn() {
 	// fn must be cleared before d is unlinked from gp.
-	gothrow("freedefer with d.fn != nil")
+	throw("freedefer with d.fn != nil")
 }
 
 // Run a deferred function if there is one.
@@ -287,7 +287,7 @@ func Goexit() {
 		d.started = true
 		reflectcall(unsafe.Pointer(d.fn), deferArgs(d), uint32(d.siz), uint32(d.siz))
 		if gp._defer != d {
-			gothrow("bad defer entry in Goexit")
+			throw("bad defer entry in Goexit")
 		}
 		d._panic = nil
 		d.fn = nil
@@ -319,7 +319,7 @@ func gopanic(e interface{}) {
 		print("panic: ")
 		printany(e)
 		print("\n")
-		gothrow("panic on system stack")
+		throw("panic on system stack")
 	}
 
 	// m.softfloat is set during software floating point.
@@ -329,25 +329,25 @@ func gopanic(e interface{}) {
 	if gp.m.softfloat != 0 {
 		gp.m.locks--
 		gp.m.softfloat = 0
-		gothrow("panic during softfloat")
+		throw("panic during softfloat")
 	}
 	if gp.m.mallocing != 0 {
 		print("panic: ")
 		printany(e)
 		print("\n")
-		gothrow("panic during malloc")
+		throw("panic during malloc")
 	}
 	if gp.m.gcing != 0 {
 		print("panic: ")
 		printany(e)
 		print("\n")
-		gothrow("panic during gc")
+		throw("panic during gc")
 	}
 	if gp.m.locks != 0 {
 		print("panic: ")
 		printany(e)
 		print("\n")
-		gothrow("panic holding locks")
+		throw("panic holding locks")
 	}
 
 	var p _panic
@@ -390,7 +390,7 @@ func gopanic(e interface{}) {
 
 		// reflectcall did not panic. Remove d.
 		if gp._defer != d {
-			gothrow("bad defer entry in panic")
+			throw("bad defer entry in panic")
 		}
 		d._panic = nil
 		d.fn = nil
@@ -416,7 +416,7 @@ func gopanic(e interface{}) {
 			gp.sigcode0 = uintptr(sp)
 			gp.sigcode1 = pc
 			mcall(recovery)
-			gothrow("recovery failed") // mcall should not return
+			throw("recovery failed") // mcall should not return
 		}
 	}
 
@@ -482,19 +482,7 @@ func dopanic(unused int) {
 }
 
 //go:nosplit
-func throw(s *byte) {
-	gp := getg()
-	if gp.m.throwing == 0 {
-		gp.m.throwing = 1
-	}
-	startpanic()
-	print("fatal error: ", gostringnocopy(s), "\n")
-	dopanic(0)
-	*(*int)(nil) = 0 // not reached
-}
-
-//go:nosplit
-func gothrow(s string) {
+func throw(s string) {
 	print("fatal error: ", s, "\n")
 	gp := getg()
 	if gp.m.throwing == 0 {

src/runtime/panic1.go

@@ -23,7 +23,7 @@ func recovery(gp *g) {
 	// d's arguments need to be in the stack.
 	if sp != 0 && (sp < gp.stack.lo || gp.stack.hi < sp) {
 		print("recover: ", hex(sp), " not in [", hex(gp.stack.lo), ", ", hex(gp.stack.hi), "]\n")
-		gothrow("bad recovery")
+		throw("bad recovery")
 	}
 
 	// Make the deferproc for this d return again,

src/runtime/parfor.go

@@ -27,7 +27,7 @@ func desc_thr_index(desc *parfor, i uint32) *parforthread {
 func parforsetup(desc *parfor, nthr, n uint32, ctx unsafe.Pointer, wait bool, body func(*parfor, uint32)) {
 	if desc == nil || nthr == 0 || nthr > desc.nthrmax || body == nil {
 		print("desc=", desc, " nthr=", nthr, " count=", n, " body=", body, "\n")
-		gothrow("parfor: invalid args")
+		throw("parfor: invalid args")
 	}
 
 	desc.body = *(*unsafe.Pointer)(unsafe.Pointer(&body))
@@ -48,7 +48,7 @@ func parforsetup(desc *parfor, nthr, n uint32, ctx unsafe.Pointer, wait bool, bo
 		end := uint32(uint64(n) * uint64(i+1) / uint64(nthr))
 		pos := &desc_thr_index(desc, i).pos
 		if uintptr(unsafe.Pointer(pos))&7 != 0 {
-			gothrow("parforsetup: pos is not aligned")
+			throw("parforsetup: pos is not aligned")
 		}
 		*pos = uint64(begin) | uint64(end)<<32
 	}
@@ -59,7 +59,7 @@ func parfordo(desc *parfor) {
 	tid := xadd(&desc.thrseq, 1) - 1
 	if tid >= desc.nthr {
 		print("tid=", tid, " nthr=", desc.nthr, "\n")
-		gothrow("parfor: invalid tid")
+		throw("parfor: invalid tid")
 	}
 
 	// If single-threaded, just execute the for serially.
@@ -141,7 +141,7 @@ func parfordo(desc *parfor) {
 			if begin < end {
 				// Has successfully stolen some work.
 				if idle {
-					gothrow("parfor: should not be idle")
+					throw("parfor: should not be idle")
 				}
 				atomicstore64(mypos, uint64(begin)|uint64(end)<<32)
 				me.nsteal++

src/runtime/proc.go

@@ -43,7 +43,7 @@ func main() {
 	lockOSThread()
 
 	if g.m != &m0 {
-		gothrow("runtime.main not on m0")
+		throw("runtime.main not on m0")
 	}
 
 	runtime_init() // must be before defer
@@ -60,20 +60,20 @@ func main() {
 
 	if iscgo {
 		if _cgo_thread_start == nil {
-			gothrow("_cgo_thread_start missing")
+			throw("_cgo_thread_start missing")
 		}
 		if _cgo_malloc == nil {
-			gothrow("_cgo_malloc missing")
+			throw("_cgo_malloc missing")
 		}
 		if _cgo_free == nil {
-			gothrow("_cgo_free missing")
+			throw("_cgo_free missing")
 		}
 		if GOOS != "windows" {
 			if _cgo_setenv == nil {
-				gothrow("_cgo_setenv missing")
+				throw("_cgo_setenv missing")
 			}
 			if _cgo_unsetenv == nil {
-				gothrow("_cgo_unsetenv missing")
+				throw("_cgo_unsetenv missing")
 			}
 		}
 	}
@@ -114,7 +114,7 @@ func forcegchelper() {
 	for {
 		lock(&forcegc.lock)
 		if forcegc.idle != 0 {
-			gothrow("forcegc: phase error")
+			throw("forcegc: phase error")
 		}
 		atomicstore(&forcegc.idle, 1)
 		goparkunlock(&forcegc.lock, "force gc (idle)")
@@ -141,7 +141,7 @@ func gopark(unlockf func(*g, unsafe.Pointer) bool, lock unsafe.Pointer, reason s
 	gp := mp.curg
 	status := readgstatus(gp)
 	if status != _Grunning && status != _Gscanrunning {
-		gothrow("gopark: bad g status")
+		throw("gopark: bad g status")
 	}
 	mp.waitlock = lock
 	mp.waitunlockf = *(*unsafe.Pointer)(unsafe.Pointer(&unlockf))
@@ -169,7 +169,7 @@ func acquireSudog() *sudog {
 	s := c.sudogcache
 	if s != nil {
 		if s.elem != nil {
-			gothrow("acquireSudog: found s.elem != nil in cache")
+			throw("acquireSudog: found s.elem != nil in cache")
 		}
 		c.sudogcache = s.next
 		s.next = nil
@@ -187,7 +187,7 @@ func acquireSudog() *sudog {
 	mp := acquirem()
 	p := new(sudog)
 	if p.elem != nil {
-		gothrow("acquireSudog: found p.elem != nil after new")
+		throw("acquireSudog: found p.elem != nil after new")
 	}
 	releasem(mp)
 	return p
@@ -196,23 +196,23 @@ func acquireSudog() *sudog {
 //go:nosplit
 func releaseSudog(s *sudog) {
 	if s.elem != nil {
-		gothrow("runtime: sudog with non-nil elem")
+		throw("runtime: sudog with non-nil elem")
 	}
 	if s.selectdone != nil {
-		gothrow("runtime: sudog with non-nil selectdone")
+		throw("runtime: sudog with non-nil selectdone")
 	}
 	if s.next != nil {
-		gothrow("runtime: sudog with non-nil next")
+		throw("runtime: sudog with non-nil next")
 	}
 	if s.prev != nil {
-		gothrow("runtime: sudog with non-nil prev")
+		throw("runtime: sudog with non-nil prev")
 	}
 	if s.waitlink != nil {
-		gothrow("runtime: sudog with non-nil waitlink")
+		throw("runtime: sudog with non-nil waitlink")
 	}
 	gp := getg()
 	if gp.param != nil {
-		gothrow("runtime: releaseSudog with non-nil gp.param")
+		throw("runtime: releaseSudog with non-nil gp.param")
 	}
 	c := gomcache()
 	s.next = c.sudogcache
@@ -228,11 +228,11 @@ func funcPC(f interface{}) uintptr {
 
 // called from assembly
 func badmcall(fn func(*g)) {
-	gothrow("runtime: mcall called on m->g0 stack")
+	throw("runtime: mcall called on m->g0 stack")
 }
 
 func badmcall2(fn func(*g)) {
-	gothrow("runtime: mcall function returned")
+	throw("runtime: mcall function returned")
 }
 
 func badreflectcall() {
@@ -263,7 +263,7 @@ var (
 
 func allgadd(gp *g) {
 	if readgstatus(gp) == _Gidle {
-		gothrow("allgadd: bad status Gidle")
+		throw("allgadd: bad status Gidle")
 	}
 
 	lock(&allglock)

src/runtime/race0.go

@@ -16,22 +16,22 @@ const raceenabled = false
 
 // Because raceenabled is false, none of these functions should be called.
 
-func raceReadObjectPC(t *_type, addr unsafe.Pointer, callerpc, pc uintptr)  { gothrow("race") }
-func raceWriteObjectPC(t *_type, addr unsafe.Pointer, callerpc, pc uintptr) { gothrow("race") }
-func raceinit() uintptr                                                     { gothrow("race"); return 0 }
-func racefini()                                                             { gothrow("race") }
-func racemapshadow(addr unsafe.Pointer, size uintptr)                       { gothrow("race") }
-func racewritepc(addr unsafe.Pointer, callerpc, pc uintptr)                 { gothrow("race") }
-func racereadpc(addr unsafe.Pointer, callerpc, pc uintptr)                  { gothrow("race") }
-func racereadrangepc(addr unsafe.Pointer, sz, callerpc, pc uintptr)         { gothrow("race") }
-func racewriterangepc(addr unsafe.Pointer, sz, callerpc, pc uintptr)        { gothrow("race") }
-func raceacquire(addr unsafe.Pointer)                                       { gothrow("race") }
-func raceacquireg(gp *g, addr unsafe.Pointer)                               { gothrow("race") }
-func racerelease(addr unsafe.Pointer)                                       { gothrow("race") }
-func racereleaseg(gp *g, addr unsafe.Pointer)                               { gothrow("race") }
-func racereleasemerge(addr unsafe.Pointer)                                  { gothrow("race") }
-func racereleasemergeg(gp *g, addr unsafe.Pointer)                          { gothrow("race") }
-func racefingo()                                                            { gothrow("race") }
-func racemalloc(p unsafe.Pointer, sz uintptr)                               { gothrow("race") }
-func racegostart(pc uintptr) uintptr                                        { gothrow("race"); return 0 }
-func racegoend()                                                            { gothrow("race") }
+func raceReadObjectPC(t *_type, addr unsafe.Pointer, callerpc, pc uintptr)  { throw("race") }
+func raceWriteObjectPC(t *_type, addr unsafe.Pointer, callerpc, pc uintptr) { throw("race") }
+func raceinit() uintptr                                                     { throw("race"); return 0 }
+func racefini()                                                             { throw("race") }
+func racemapshadow(addr unsafe.Pointer, size uintptr)                       { throw("race") }
+func racewritepc(addr unsafe.Pointer, callerpc, pc uintptr)                 { throw("race") }
+func racereadpc(addr unsafe.Pointer, callerpc, pc uintptr)                  { throw("race") }
+func racereadrangepc(addr unsafe.Pointer, sz, callerpc, pc uintptr)         { throw("race") }
+func racewriterangepc(addr unsafe.Pointer, sz, callerpc, pc uintptr)        { throw("race") }
+func raceacquire(addr unsafe.Pointer)                                       { throw("race") }
+func raceacquireg(gp *g, addr unsafe.Pointer)                               { throw("race") }
+func racerelease(addr unsafe.Pointer)                                       { throw("race") }
+func racereleaseg(gp *g, addr unsafe.Pointer)                               { throw("race") }
+func racereleasemerge(addr unsafe.Pointer)                                  { throw("race") }
+func racereleasemergeg(gp *g, addr unsafe.Pointer)                          { throw("race") }
+func racefingo()                                                            { throw("race") }
+func racemalloc(p unsafe.Pointer, sz uintptr)                               { throw("race") }
+func racegostart(pc uintptr) uintptr                                        { throw("race"); return 0 }
+func racegoend()                                                            { throw("race") }

src/runtime/race1.go

@@ -110,7 +110,7 @@ func isvalidaddr(addr unsafe.Pointer) bool {
 func raceinit() uintptr {
 	// cgo is required to initialize libc, which is used by race runtime
 	if !iscgo {
-		gothrow("raceinit: race build must use cgo")
+		throw("raceinit: race build must use cgo")
 	}
 
 	var racectx uintptr

src/runtime/runtime1.go

@@ -102,36 +102,36 @@ func testAtomic64() {
 	prefetcht2(uintptr(unsafe.Pointer(&z64)))
 	prefetchnta(uintptr(unsafe.Pointer(&z64)))
 	if cas64(&z64, x64, 1) {
-		gothrow("cas64 failed")
+		throw("cas64 failed")
 	}
 	if x64 != 0 {
-		gothrow("cas64 failed")
+		throw("cas64 failed")
 	}
 	x64 = 42
 	if !cas64(&z64, x64, 1) {
-		gothrow("cas64 failed")
+		throw("cas64 failed")
 	}
 	if x64 != 42 || z64 != 1 {
-		gothrow("cas64 failed")
+		throw("cas64 failed")
 	}
 	if atomicload64(&z64) != 1 {
-		gothrow("load64 failed")
+		throw("load64 failed")
 	}
 	atomicstore64(&z64, (1<<40)+1)
 	if atomicload64(&z64) != (1<<40)+1 {
-		gothrow("store64 failed")
+		throw("store64 failed")
 	}
 	if xadd64(&z64, (1<<40)+1) != (2<<40)+2 {
-		gothrow("xadd64 failed")
+		throw("xadd64 failed")
 	}
 	if atomicload64(&z64) != (2<<40)+2 {
-		gothrow("xadd64 failed")
+		throw("xadd64 failed")
 	}
 	if xchg64(&z64, (3<<40)+3) != (2<<40)+2 {
-		gothrow("xchg64 failed")
+		throw("xchg64 failed")
 	}
 	if atomicload64(&z64) != (3<<40)+3 {
-		gothrow("xchg64 failed")
+		throw("xchg64 failed")
 	}
 }
 
@@ -162,78 +162,78 @@ func check() {
 	var y1 y1t
 
 	if unsafe.Sizeof(a) != 1 {
-		gothrow("bad a")
+		throw("bad a")
 	}
 	if unsafe.Sizeof(b) != 1 {
-		gothrow("bad b")
+		throw("bad b")
 	}
 	if unsafe.Sizeof(c) != 2 {
-		gothrow("bad c")
+		throw("bad c")
 	}
 	if unsafe.Sizeof(d) != 2 {
-		gothrow("bad d")
+		throw("bad d")
 	}
 	if unsafe.Sizeof(e) != 4 {
-		gothrow("bad e")
+		throw("bad e")
 	}
 	if unsafe.Sizeof(f) != 4 {
-		gothrow("bad f")
+		throw("bad f")
 	}
 	if unsafe.Sizeof(g) != 8 {
-		gothrow("bad g")
+		throw("bad g")
 	}
 	if unsafe.Sizeof(h) != 8 {
-		gothrow("bad h")
+		throw("bad h")
 	}
 	if unsafe.Sizeof(i) != 4 {
-		gothrow("bad i")
+		throw("bad i")
 	}
 	if unsafe.Sizeof(j) != 8 {
-		gothrow("bad j")
+		throw("bad j")
 	}
 	if unsafe.Sizeof(k) != ptrSize {
-		gothrow("bad k")
+		throw("bad k")
 	}
 	if unsafe.Sizeof(l) != ptrSize {
-		gothrow("bad l")
+		throw("bad l")
 	}
 	if unsafe.Sizeof(x1) != 1 {
-		gothrow("bad unsafe.Sizeof x1")
+		throw("bad unsafe.Sizeof x1")
 	}
 	if unsafe.Offsetof(y1.y) != 1 {
-		gothrow("bad offsetof y1.y")
+		throw("bad offsetof y1.y")
 	}
 	if unsafe.Sizeof(y1) != 2 {
-		gothrow("bad unsafe.Sizeof y1")
+		throw("bad unsafe.Sizeof y1")
 	}
 
 	if timediv(12345*1000000000+54321, 1000000000, &e) != 12345 || e != 54321 {
-		gothrow("bad timediv")
+		throw("bad timediv")
 	}
 
 	var z uint32
 	z = 1
 	if !cas(&z, 1, 2) {
-		gothrow("cas1")
+		throw("cas1")
 	}
 	if z != 2 {
-		gothrow("cas2")
+		throw("cas2")
 	}
 
 	z = 4
 	if cas(&z, 5, 6) {
-		gothrow("cas3")
+		throw("cas3")
 	}
 	if z != 4 {
-		gothrow("cas4")
+		throw("cas4")
 	}
 
 	z = 0xffffffff
 	if !cas(&z, 0xffffffff, 0xfffffffe) {
-		gothrow("cas5")
+		throw("cas5")
 	}
 	if z != 0xfffffffe {
-		gothrow("cas6")
+		throw("cas6")
 	}
 
 	k = unsafe.Pointer(uintptr(0xfedcb123))
@@ -241,58 +241,58 @@ func check() {
 		k = unsafe.Pointer(uintptr(unsafe.Pointer(k)) << 10)
 	}
 	if casp(&k, nil, nil) {
-		gothrow("casp1")
+		throw("casp1")
 	}
 	k1 = add(k, 1)
 	if !casp(&k, k, k1) {
-		gothrow("casp2")
+		throw("casp2")
 	}
 	if k != k1 {
-		gothrow("casp3")
+		throw("casp3")
 	}
 
 	m = [4]byte{1, 1, 1, 1}
 	atomicor8(&m[1], 0xf0)
 	if m[0] != 1 || m[1] != 0xf1 || m[2] != 1 || m[3] != 1 {
-		gothrow("atomicor8")
+		throw("atomicor8")
 	}
 
 	*(*uint64)(unsafe.Pointer(&j)) = ^uint64(0)
 	if j == j {
-		gothrow("float64nan")
+		throw("float64nan")
 	}
 	if !(j != j) {
-		gothrow("float64nan1")
+		throw("float64nan1")
 	}
 
 	*(*uint64)(unsafe.Pointer(&j1)) = ^uint64(1)
 	if j == j1 {
-		gothrow("float64nan2")
+		throw("float64nan2")
 	}
 	if !(j != j1) {
-		gothrow("float64nan3")
+		throw("float64nan3")
 	}
 
 	*(*uint32)(unsafe.Pointer(&i)) = ^uint32(0)
 	if i == i {
-		gothrow("float32nan")
+		throw("float32nan")
 	}
 	if i == i {
-		gothrow("float32nan1")
+		throw("float32nan1")
 	}
 
 	*(*uint32)(unsafe.Pointer(&i1)) = ^uint32(1)
 	if i == i1 {
-		gothrow("float32nan2")
+		throw("float32nan2")
 	}
 	if i == i1 {
-		gothrow("float32nan3")
+		throw("float32nan3")
 	}
 
 	testAtomic64()
 
 	if _FixedStack != round2(_FixedStack) {
-		gothrow("FixedStack is not power-of-2")
+		throw("FixedStack is not power-of-2")
 	}
 }
 

src/runtime/select.go

@@ -28,7 +28,7 @@ func selectsize(size uintptr) uintptr {
 func newselect(sel *_select, selsize int64, size int32) {
 	if selsize != int64(selectsize(uintptr(size))) {
 		print("runtime: bad select size ", selsize, ", want ", selectsize(uintptr(size)), "\n")
-		gothrow("bad select size")
+		throw("bad select size")
 	}
 	sel.tcase = uint16(size)
 	sel.ncase = 0
@@ -53,7 +53,7 @@ func selectsend(sel *_select, c *hchan, elem unsafe.Pointer) (selected bool) {
 func selectsendImpl(sel *_select, c *hchan, pc uintptr, elem unsafe.Pointer, so uintptr) {
 	i := sel.ncase
 	if i >= sel.tcase {
-		gothrow("selectsend: too many cases")
+		throw("selectsend: too many cases")
 	}
 	sel.ncase = i + 1
 	cas := (*scase)(add(unsafe.Pointer(&sel.scase), uintptr(i)*unsafe.Sizeof(sel.scase[0])))
@@ -90,7 +90,7 @@ func selectrecv2(sel *_select, c *hchan, elem unsafe.Pointer, received *bool) (s
 func selectrecvImpl(sel *_select, c *hchan, pc uintptr, elem unsafe.Pointer, received *bool, so uintptr) {
 	i := sel.ncase
 	if i >= sel.tcase {
-		gothrow("selectrecv: too many cases")
+		throw("selectrecv: too many cases")
 	}
 	sel.ncase = i + 1
 	cas := (*scase)(add(unsafe.Pointer(&sel.scase), uintptr(i)*unsafe.Sizeof(sel.scase[0])))
@@ -115,7 +115,7 @@ func selectdefault(sel *_select) (selected bool) {
 func selectdefaultImpl(sel *_select, callerpc uintptr, so uintptr) {
 	i := sel.ncase
 	if i >= sel.tcase {
-		gothrow("selectdefault: too many cases")
+		throw("selectdefault: too many cases")
 	}
 	sel.ncase = i + 1
 	cas := (*scase)(add(unsafe.Pointer(&sel.scase), uintptr(i)*unsafe.Sizeof(sel.scase[0])))
@@ -263,7 +263,7 @@ func selectgoImpl(sel *_select) (uintptr, uint16) {
 		for i := 0; i+1 < int(sel.ncase); i++ {
 			if lockorder[i].sortkey() > lockorder[i+1].sortkey() {
 				print("i=", i, " x=", lockorder[i], " y=", lockorder[i+1], "\n")
-				gothrow("select: broken sort")
+				throw("select: broken sort")
 			}
 		}
 	*/
@@ -412,7 +412,7 @@ loop:
 	c = cas._chan
 
 	if c.dataqsiz > 0 {
-		gothrow("selectgo: shouldn't happen")
+		throw("selectgo: shouldn't happen")
 	}
 
 	if debugSelect {

src/runtime/sema.go

@@ -62,7 +62,7 @@ func net_runtime_Semrelease(addr *uint32) {
 func semacquire(addr *uint32, profile bool) {
 	gp := getg()
 	if gp != gp.m.curg {
-		gothrow("semacquire not on the G stack")
+		throw("semacquire not on the G stack")
 	}
 
 	// Easy case.
@@ -284,6 +284,6 @@ func syncsemrelease(s *syncSema, n uint32) {
 func syncsemcheck(sz uintptr) {
 	if sz != unsafe.Sizeof(syncSema{}) {
 		print("runtime: bad syncSema size - sync=", sz, " runtime=", unsafe.Sizeof(syncSema{}), "\n")
-		gothrow("bad syncSema size")
+		throw("bad syncSema size")
 	}
 }

src/runtime/signal1_unix.go

@@ -16,7 +16,7 @@ func initsig() {
 	// sigtable should describe what to do for all the possible signals.
 	if len(sigtable) != _NSIG {
 		print("runtime: len(sigtable)=", len(sigtable), " _NSIG=", _NSIG, "\n")
-		gothrow("initsig")
+		throw("initsig")
 	}
 
 	// First call: basic setup.

src/runtime/sigpanic_unix.go

@@ -9,7 +9,7 @@ package runtime
 func sigpanic() {
 	g := getg()
 	if !canpanic(g) {
-		gothrow("unexpected signal during runtime execution")
+		throw("unexpected signal during runtime execution")
 	}
 
 	switch g.sig {
@@ -18,13 +18,13 @@ func sigpanic() {
 			panicmem()
 		}
 		print("unexpected fault address ", hex(g.sigcode1), "\n")
-		gothrow("fault")
+		throw("fault")
 	case _SIGSEGV:
 		if (g.sigcode0 == 0 || g.sigcode0 == _SEGV_MAPERR || g.sigcode0 == _SEGV_ACCERR) && g.sigcode1 < 0x1000 || g.paniconfault {
 			panicmem()
 		}
 		print("unexpected fault address ", hex(g.sigcode1), "\n")
-		gothrow("fault")
+		throw("fault")
 	case _SIGFPE:
 		switch g.sigcode0 {
 		case _FPE_INTDIV:
@@ -37,7 +37,7 @@ func sigpanic() {
 
 	if g.sig >= uint32(len(sigtable)) {
 		// can't happen: we looked up g.sig in sigtable to decide to call sigpanic
-		gothrow("unexpected signal value")
+		throw("unexpected signal value")
 	}
 	panic(errorString(sigtable[g.sig].name))
 }

src/runtime/sigqueue.go

@@ -67,7 +67,7 @@ Send:
 	for {
 		switch atomicload(&sig.state) {
 		default:
-			gothrow("sigsend: inconsistent state")
+			throw("sigsend: inconsistent state")
 		case sigIdle:
 			if cas(&sig.state, sigIdle, sigSending) {
 				break Send
@@ -103,7 +103,7 @@ func signal_recv() uint32 {
 		for {
 			switch atomicload(&sig.state) {
 			default:
-				gothrow("signal_recv: inconsistent state")
+				throw("signal_recv: inconsistent state")
 			case sigIdle:
 				if cas(&sig.state, sigIdle, sigReceiving) {
 					notetsleepg(&sig.note, -1)

src/runtime/softfloat_arm.go

@@ -21,7 +21,7 @@ const (
 var fptrace = 0
 
 func fabort() {
-	gothrow("unsupported floating point instruction")
+	throw("unsupported floating point instruction")
 }
 
 func fputf(reg uint32, val uint32) {

src/runtime/stack1.go

@@ -49,7 +49,7 @@ var stackfreequeue stack
 
 func stackinit() {
 	if _StackCacheSize&_PageMask != 0 {
-		gothrow("cache size must be a multiple of page size")
+		throw("cache size must be a multiple of page size")
 	}
 	for i := range stackpool {
 		mSpanList_Init(&stackpool[i])
@@ -65,13 +65,13 @@ func stackpoolalloc(order uint8) gclinkptr {
 		// no free stacks.  Allocate another span worth.
 		s = mHeap_AllocStack(&mheap_, _StackCacheSize>>_PageShift)
 		if s == nil {
-			gothrow("out of memory")
+			throw("out of memory")
 		}
 		if s.ref != 0 {
-			gothrow("bad ref")
+			throw("bad ref")
 		}
 		if s.freelist.ptr() != nil {
-			gothrow("bad freelist")
+			throw("bad freelist")
 		}
 		for i := uintptr(0); i < _StackCacheSize; i += _FixedStack << order {
 			x := gclinkptr(uintptr(s.start)<<_PageShift + i)
@@ -82,7 +82,7 @@ func stackpoolalloc(order uint8) gclinkptr {
 	}
 	x := s.freelist
 	if x.ptr() == nil {
-		gothrow("span has no free stacks")
+		throw("span has no free stacks")
 	}
 	s.freelist = x.ptr().next
 	s.ref++
@@ -97,7 +97,7 @@ func stackpoolalloc(order uint8) gclinkptr {
 func stackpoolfree(x gclinkptr, order uint8) {
 	s := mHeap_Lookup(&mheap_, (unsafe.Pointer)(x))
 	if s.state != _MSpanStack {
-		gothrow("freeing stack not in a stack span")
+		throw("freeing stack not in a stack span")
 	}
 	if s.freelist.ptr() == nil {
 		// s will now have a free stack
@@ -179,10 +179,10 @@ func stackalloc(n uint32) stack {
 	// Doing so would cause a deadlock (issue 1547).
 	thisg := getg()
 	if thisg != thisg.m.g0 {
-		gothrow("stackalloc not on scheduler stack")
+		throw("stackalloc not on scheduler stack")
 	}
 	if n&(n-1) != 0 {
-		gothrow("stack size not a power of 2")
+		throw("stack size not a power of 2")
 	}
 	if stackDebug >= 1 {
 		print("stackalloc ", n, "\n")
@@ -191,7 +191,7 @@ func stackalloc(n uint32) stack {
 	if debug.efence != 0 || stackFromSystem != 0 {
 		v := sysAlloc(round(uintptr(n), _PageSize), &memstats.stacks_sys)
 		if v == nil {
-			gothrow("out of memory (stackalloc)")
+			throw("out of memory (stackalloc)")
 		}
 		return stack{uintptr(v), uintptr(v) + uintptr(n)}
 	}
@@ -230,7 +230,7 @@ func stackalloc(n uint32) stack {
 	} else {
 		s := mHeap_AllocStack(&mheap_, round(uintptr(n), _PageSize)>>_PageShift)
 		if s == nil {
-			gothrow("out of memory")
+			throw("out of memory")
 		}
 		v = (unsafe.Pointer)(s.start << _PageShift)
 	}
@@ -249,7 +249,7 @@ func stackfree(stk stack) {
 	n := stk.hi - stk.lo
 	v := (unsafe.Pointer)(stk.lo)
 	if n&(n-1) != 0 {
-		gothrow("stack not a power of 2")
+		throw("stack not a power of 2")
 	}
 	if stackDebug >= 1 {
 		println("stackfree", v, n)
@@ -288,7 +288,7 @@ func stackfree(stk stack) {
 		s := mHeap_Lookup(&mheap_, v)
 		if s.state != _MSpanStack {
 			println(hex(s.start<<_PageShift), v)
-			gothrow("bad span state")
+			throw("bad span state")
 		}
 		mHeap_FreeStack(&mheap_, s)
 	}
@@ -379,7 +379,7 @@ func adjustpointers(scanp unsafe.Pointer, cbv *bitvector, adjinfo *adjustinfo, f
 		}
 		switch ptrbits(&bv, i) {
 		default:
-			gothrow("unexpected pointer bits")
+			throw("unexpected pointer bits")
 		case _BitsDead:
 			if debug.gcdead != 0 {
 				*(*unsafe.Pointer)(add(scanp, i*ptrSize)) = unsafe.Pointer(uintptr(poisonStack))
@@ -394,7 +394,7 @@ func adjustpointers(scanp unsafe.Pointer, cbv *bitvector, adjinfo *adjustinfo, f
 				// Live analysis wrong?
 				getg().m.traceback = 2
 				print("runtime: bad pointer in frame ", gofuncname(f), " at ", add(scanp, i*ptrSize), ": ", p, "\n")
-				gothrow("invalid stack pointer")
+				throw("invalid stack pointer")
 			}
 			if minp <= up && up < maxp {
 				if stackDebug >= 3 {
@@ -445,13 +445,13 @@ func adjustframe(frame *stkframe, arg unsafe.Pointer) bool {
 		stackmap := (*stackmap)(funcdata(f, _FUNCDATA_LocalsPointerMaps))
 		if stackmap == nil || stackmap.n <= 0 {
 			print("runtime: frame ", funcname(f), " untyped locals ", hex(frame.varp-size), "+", hex(size), "\n")
-			gothrow("missing stackmap")
+			throw("missing stackmap")
 		}
 		// Locals bitmap information, scan just the pointers in locals.
 		if pcdata < 0 || pcdata >= stackmap.n {
 			// don't know where we are
 			print("runtime: pcdata is ", pcdata, " and ", stackmap.n, " locals stack map entries for ", funcname(f), " (targetpc=", targetpc, ")\n")
-			gothrow("bad symbol table")
+			throw("bad symbol table")
 		}
 		bv = stackmapdata(stackmap, pcdata)
 		size = (uintptr(bv.n) * ptrSize) / _BitsPerPointer
@@ -470,12 +470,12 @@ func adjustframe(frame *stkframe, arg unsafe.Pointer) bool {
 			stackmap := (*stackmap)(funcdata(f, _FUNCDATA_ArgsPointerMaps))
 			if stackmap == nil || stackmap.n <= 0 {
 				print("runtime: frame ", funcname(f), " untyped args ", frame.argp, "+", uintptr(frame.arglen), "\n")
-				gothrow("missing stackmap")
+				throw("missing stackmap")
 			}
 			if pcdata < 0 || pcdata >= stackmap.n {
 				// don't know where we are
 				print("runtime: pcdata is ", pcdata, " and ", stackmap.n, " args stack map entries for ", funcname(f), " (targetpc=", targetpc, ")\n")
-				gothrow("bad symbol table")
+				throw("bad symbol table")
 			}
 			bv = stackmapdata(stackmap, pcdata)
 		}
@@ -529,11 +529,11 @@ func fillstack(stk stack, b byte) {
 // Caller must have changed gp status to Gcopystack.
 func copystack(gp *g, newsize uintptr) {
 	if gp.syscallsp != 0 {
-		gothrow("stack growth not allowed in system call")
+		throw("stack growth not allowed in system call")
 	}
 	old := gp.stack
 	if old.lo == 0 {
-		gothrow("nil stackbase")
+		throw("nil stackbase")
 	}
 	used := old.hi - gp.sched.sp
 
@@ -612,13 +612,13 @@ func newstack() {
 	thisg := getg()
 	// TODO: double check all gp. shouldn't be getg().
 	if thisg.m.morebuf.g.stackguard0 == stackFork {
-		gothrow("stack growth after fork")
+		throw("stack growth after fork")
 	}
 	if thisg.m.morebuf.g != thisg.m.curg {
 		print("runtime: newstack called from g=", thisg.m.morebuf.g, "\n"+"\tm=", thisg.m, " m->curg=", thisg.m.curg, " m->g0=", thisg.m.g0, " m->gsignal=", thisg.m.gsignal, "\n")
 		morebuf := thisg.m.morebuf
 		traceback(morebuf.pc, morebuf.sp, morebuf.lr, morebuf.g)
-		gothrow("runtime: wrong goroutine in newstack")
+		throw("runtime: wrong goroutine in newstack")
 	}
 	if thisg.m.curg.throwsplit {
 		gp := thisg.m.curg
@@ -629,7 +629,7 @@ func newstack() {
 		print("runtime: newstack sp=", hex(gp.sched.sp), " stack=[", hex(gp.stack.lo), ", ", hex(gp.stack.hi), "]\n",
 			"\tmorebuf={pc:", hex(morebuf.pc), " sp:", hex(morebuf.sp), " lr:", hex(morebuf.lr), "}\n",
 			"\tsched={pc:", hex(gp.sched.pc), " sp:", hex(gp.sched.sp), " lr:", hex(gp.sched.lr), " ctxt:", gp.sched.ctxt, "}\n")
-		gothrow("runtime: stack split at bad time")
+		throw("runtime: stack split at bad time")
 	}
 
 	// The goroutine must be executing in order to call newstack,
@@ -648,7 +648,7 @@ func newstack() {
 	rewindmorestack(&gp.sched)
 
 	if gp.stack.lo == 0 {
-		gothrow("missing stack in newstack")
+		throw("missing stack in newstack")
 	}
 	sp := gp.sched.sp
 	if thechar == '6' || thechar == '8' {
@@ -663,7 +663,7 @@ func newstack() {
 	if sp < gp.stack.lo {
 		print("runtime: gp=", gp, ", gp->status=", hex(readgstatus(gp)), "\n ")
 		print("runtime: split stack overflow: ", hex(sp), " < ", hex(gp.stack.lo), "\n")
-		gothrow("runtime: split stack overflow")
+		throw("runtime: split stack overflow")
 	}
 
 	if gp.sched.ctxt != nil {
@@ -676,10 +676,10 @@ func newstack() {
 
 	if gp.stackguard0 == stackPreempt {
 		if gp == thisg.m.g0 {
-			gothrow("runtime: preempt g0")
+			throw("runtime: preempt g0")
 		}
 		if thisg.m.p == nil && thisg.m.locks == 0 {
-			gothrow("runtime: g is running but p is not")
+			throw("runtime: g is running but p is not")
 		}
 		if gp.preemptscan {
 			for !castogscanstatus(gp, _Gwaiting, _Gscanwaiting) {
@@ -715,7 +715,7 @@ func newstack() {
 	newsize := oldsize * 2
 	if uintptr(newsize) > maxstacksize {
 		print("runtime: goroutine stack exceeds ", maxstacksize, "-byte limit\n")
-		gothrow("stack overflow")
+		throw("stack overflow")
 	}
 
 	casgstatus(gp, _Gwaiting, _Gcopystack)
@@ -761,7 +761,7 @@ func shrinkstack(gp *g) {
 		return
 	}
 	if gp.stack.lo == 0 {
-		gothrow("missing stack in shrinkstack")
+		throw("missing stack in shrinkstack")
 	}
 
 	oldsize := gp.stack.hi - gp.stack.lo
@@ -808,6 +808,6 @@ func shrinkfinish() {
 //go:nosplit
 func morestackc() {
 	systemstack(func() {
-		gothrow("attempt to execute C code on Go stack")
+		throw("attempt to execute C code on Go stack")
 	})
 }

src/runtime/stack_test.go

@@ -395,3 +395,21 @@ func TestStackPanic(t *testing.T) {
 	useStack(32)
 	panic("test panic")
 }
+
+func BenchmarkStackCopy(b *testing.B) {
+	c := make(chan bool)
+	for i := 0; i < b.N; i++ {
+		go func() {
+			count(1000000)
+			c <- true
+		}()
+		<-c
+	}
+}
+
+func count(n int) int {
+	if n == 0 {
+		return 0
+	}
+	return 1 + count(n-1)
+}

src/runtime/string.go

@@ -18,7 +18,7 @@ func concatstrings(a []string) string {
 			continue
 		}
 		if l+n < l {
-			gothrow("string concatenation too long")
+			throw("string concatenation too long")
 		}
 		l += n
 		count++
@@ -222,7 +222,7 @@ func rawbyteslice(size int) (b []byte) {
 // rawruneslice allocates a new rune slice. The rune slice is not zeroed.
 func rawruneslice(size int) (b []rune) {
 	if uintptr(size) > _MaxMem/4 {
-		gothrow("out of memory")
+		throw("out of memory")
 	}
 	mem := goroundupsize(uintptr(size) * 4)
 	p := mallocgc(mem, nil, flagNoScan|flagNoZero)

src/runtime/stubs.go

@@ -59,7 +59,7 @@ func mcall(fn func(*g))
 func systemstack(fn func())
 
 func badsystemstack() {
-	gothrow("systemstack called from unexpected goroutine")
+	throw("systemstack called from unexpected goroutine")
 }
 
 // memclr clears n bytes starting at ptr.

src/runtime/symtab.go

@@ -50,7 +50,7 @@ func symtabinit() {
 	pcln32 := (*[2]uint32)(unsafe.Pointer(&pclntab))
 	if pcln32[0] != 0xfffffffb || pcln[4] != 0 || pcln[5] != 0 || pcln[6] != _PCQuantum || pcln[7] != ptrSize {
 		println("runtime: function symbol table header:", hex(pcln32[0]), hex(pcln[4]), hex(pcln[5]), hex(pcln[6]), hex(pcln[7]))
-		gothrow("invalid function symbol table\n")
+		throw("invalid function symbol table\n")
 	}
 
 	// pclntable is all bytes of pclntab symbol.
@@ -79,7 +79,7 @@ func symtabinit() {
 			for j := 0; j <= i; j++ {
 				print("\t", hex(ftab[j].entry), " ", gofuncname((*_func)(unsafe.Pointer(&pclntable[ftab[j].funcoff]))), "\n")
 			}
-			gothrow("invalid runtime symbol table")
+			throw("invalid runtime symbol table")
 		}
 	}
 
@@ -150,7 +150,7 @@ func findfunc(pc uintptr) *_func {
 		}
 	}
 
-	gothrow("findfunc: binary search failed")
+	throw("findfunc: binary search failed")
 	return nil
 }
 
@@ -192,7 +192,7 @@ func pcvalue(f *_func, off int32, targetpc uintptr, strict bool) int32 {
 		print("\tvalue=", val, " until pc=", hex(pc), "\n")
 	}
 
-	gothrow("invalid runtime symbol table")
+	throw("invalid runtime symbol table")
 	return -1
 }
 

src/runtime/sys_arm.go

@@ -10,7 +10,7 @@ import "unsafe"
 // and then did an immediate Gosave.
 func gostartcall(buf *gobuf, fn, ctxt unsafe.Pointer) {
 	if buf.lr != 0 {
-		gothrow("invalid use of gostartcall")
+		throw("invalid use of gostartcall")
 	}
 	buf.lr = buf.pc
 	buf.pc = uintptr(fn)
@@ -31,5 +31,5 @@ func rewindmorestack(buf *gobuf) {
 	}
 
 	print("runtime: pc=", hex(buf.pc), " ", hex(inst), "\n")
-	gothrow("runtime: misuse of rewindmorestack")
+	throw("runtime: misuse of rewindmorestack")
 }

src/runtime/sys_ppc64x.go

@@ -12,7 +12,7 @@ import "unsafe"
 // and then did an immediate Gosave.
 func gostartcall(buf *gobuf, fn, ctxt unsafe.Pointer) {
 	if buf.lr != 0 {
-		gothrow("invalid use of gostartcall")
+		throw("invalid use of gostartcall")
 	}
 	buf.lr = buf.pc
 	buf.pc = uintptr(fn)
@@ -33,5 +33,5 @@ func rewindmorestack(buf *gobuf) {
 		}
 	}
 	print("runtime: pc=", hex(buf.pc), " ", hex(inst), "\n")
-	gothrow("runtime: misuse of rewindmorestack")
+	throw("runtime: misuse of rewindmorestack")
 }

src/runtime/sys_x86.go

@@ -50,5 +50,5 @@ func rewindmorestack(buf *gobuf) {
 		return
 	}
 	print("runtime: pc=", pc, " ", hex(pc[0]), " ", hex(pc[1]), " ", hex(pc[2]), " ", hex(pc[3]), " ", hex(pc[4]), "\n")
-	gothrow("runtime: misuse of rewindmorestack")
+	throw("runtime: misuse of rewindmorestack")
 }

src/runtime/syscall_windows.go

@@ -70,7 +70,7 @@ func compileCallback(fn eface, cleanstack bool) (code uintptr) {
 		}
 	}
 	if n >= cb_max {
-		gothrow("too many callback functions")
+		throw("too many callback functions")
 	}
 
 	c := new(wincallbackcontext)

src/runtime/traceback.go

@@ -77,7 +77,7 @@ func tracebackdefers(gp *g, callback func(*stkframe, unsafe.Pointer) bool, v uns
 			f := findfunc(frame.pc)
 			if f == nil {
 				print("runtime: unknown pc in defer ", hex(frame.pc), "\n")
-				gothrow("unknown pc")
+				throw("unknown pc")
 			}
 			frame.fn = f
 			frame.argp = uintptr(deferArgs(d))
@@ -96,7 +96,7 @@ func tracebackdefers(gp *g, callback func(*stkframe, unsafe.Pointer) bool, v uns
 // duplicating the code and all its subtlety.
 func gentraceback(pc0 uintptr, sp0 uintptr, lr0 uintptr, gp *g, skip int, pcbuf *uintptr, max int, callback func(*stkframe, unsafe.Pointer) bool, v unsafe.Pointer, flags uint) int {
 	if goexitPC == 0 {
-		gothrow("gentraceback before goexitPC initialization")
+		throw("gentraceback before goexitPC initialization")
 	}
 	g := getg()
 	if g == gp && g == g.m.curg {
@@ -113,7 +113,7 @@ func gentraceback(pc0 uintptr, sp0 uintptr, lr0 uintptr, gp *g, skip int, pcbuf
 		// accepts an sp for the current goroutine (typically obtained by
 		// calling getcallersp) must not run on that goroutine's stack but
 		// instead on the g0 stack.
-		gothrow("gentraceback cannot trace user goroutine on its own stack")
+		throw("gentraceback cannot trace user goroutine on its own stack")
 	}
 	gotraceback := gotraceback(nil)
 	if pc0 == ^uintptr(0) && sp0 == ^uintptr(0) { // Signal to fetch saved values from gp.
@@ -163,7 +163,7 @@ func gentraceback(pc0 uintptr, sp0 uintptr, lr0 uintptr, gp *g, skip int, pcbuf
 	if f == nil {
 		if callback != nil {
 			print("runtime: unknown pc ", hex(frame.pc), "\n")
-			gothrow("unknown pc")
+			throw("unknown pc")
 		}
 		return 0
 	}
@@ -200,7 +200,7 @@ func gentraceback(pc0 uintptr, sp0 uintptr, lr0 uintptr, gp *g, skip int, pcbuf
 			// to avoid that confusion.
 			// See golang.org/issue/8153.
 			if callback != nil {
-				gothrow("traceback_arm: found jmpdefer when tracing with callback")
+				throw("traceback_arm: found jmpdefer when tracing with callback")
 			}
 			frame.lr = 0
 		} else {
@@ -221,7 +221,7 @@ func gentraceback(pc0 uintptr, sp0 uintptr, lr0 uintptr, gp *g, skip int, pcbuf
 				// get everything, so crash loudly.
 				if callback != nil {
 					print("runtime: unexpected return pc for ", gofuncname(f), " called from ", hex(frame.lr), "\n")
-					gothrow("unknown caller pc")
+					throw("unknown caller pc")
 				}
 			}
 		}
@@ -411,7 +411,7 @@ func gentraceback(pc0 uintptr, sp0 uintptr, lr0 uintptr, gp *g, skip int, pcbuf
 		for _defer = gp._defer; _defer != nil; _defer = _defer.link {
 			print("\tdefer ", _defer, " sp=", hex(_defer.sp), " pc=", hex(_defer.pc), "\n")
 		}
-		gothrow("traceback has leftover defers")
+		throw("traceback has leftover defers")
 	}
 
 	return n
@@ -430,7 +430,7 @@ func setArgInfo(frame *stkframe, f *_func, needArgMap bool) {
 			fn := *(**[2]uintptr)(unsafe.Pointer(arg0))
 			if fn[0] != f.entry {
 				print("runtime: confused by ", gofuncname(f), "\n")
-				gothrow("reflect mismatch")
+				throw("reflect mismatch")
 			}
 			bv := (*bitvector)(unsafe.Pointer(fn[1]))
 			frame.arglen = uintptr(bv.n / 2 * ptrSize)