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runtime: initialize complete Hiter during mapiterinit

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The garbage collector will scan these pointers,
so make sure they are initialized.

LGTM=bradfitz, khr
R=khr, bradfitz
CC=golang-codereviews
https://golang.org/cl/80960047
This commit is contained in:
Russ Cox 2014-03-26 21:52:29 -04:00
parent a4380927eb
commit fc6befba3c
1 changed files with 8 additions and 0 deletions
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8
src/pkg/runtime/hashmap.goc
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@ -1004,6 +1004,14 @@ func reflect·mapdelete(t *MapType, h *Hmap, key *byte) {
#pragma textflag NOSPLIT
func mapiterinit(t *MapType, h *Hmap, it *Hiter) {
// Clear pointer fields so garbage collector does not complain.
it->key = nil;
it->value = nil;
it->t = nil;
it->h = nil;
it->buckets = nil;
it->bptr = nil;
if(h == nil || h->count == 0) {
it->key = nil;
return;