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runtime: mark freedefer and deferclass go:nosplit

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This should make deferreturn nosplit all the way down,
which should fix the current windows/amd64 failure.
If not, I will change StackCopyAlways back to 0.

TBR=khr
CC=golang-codereviews
https://golang.org/cl/135600043
This commit is contained in:
Russ Cox 2014-09-08 17:37:49 -04:00
parent dc089574c4
commit 857d55a3f9
1 changed files with 2 additions and 0 deletions
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2
src/runtime/panic.go
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@ -95,6 +95,7 @@ func deferproc(siz int32, fn *funcval) { // arguments of fn follow fn
// This maps exactly to malloc size classes. // This maps exactly to malloc size classes.
// defer size class for arg size sz // defer size class for arg size sz
//go:nosplit
func deferclass(siz uintptr) uintptr { func deferclass(siz uintptr) uintptr {
return (siz + 7) >> 4 return (siz + 7) >> 4
} }
@ -159,6 +160,7 @@ func newdefer(siz int32) *_defer {
// Free the given defer. // Free the given defer.
// The defer cannot be used after this call. // The defer cannot be used after this call.
//go:nosplit
func freedefer(d *_defer) { func freedefer(d *_defer) {
if d.special { if d.special {
return return