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runtime: fix integer overflow in hashmap

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The test is problematic, because it requires 8GB+ of RAM.
Fixes #5239.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/8550043
This commit is contained in:
Dmitriy Vyukov 2013-04-08 18:56:38 -07:00
parent 77a0b96f2f
commit c8b2b725e0
1 changed files with 1 additions and 1 deletions
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2
src/pkg/runtime/hashmap.c
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@ -451,7 +451,7 @@ hash_grow(MapType *t, Hmap *h)
old_buckets = h->buckets;
// NOTE: this could be a big malloc, but since we don't need zeroing it is probably fast.
if(checkgc) mstats.next_gc = mstats.heap_alloc;
new_buckets = runtime·mallocgc(h->bucketsize << (h->B + 1), 0, 1, 0);
new_buckets = runtime·mallocgc((uintptr)h->bucketsize << (h->B + 1), 0, 1, 0);
flags = (h->flags & ~(Iterator | OldIterator));
if((h->flags & Iterator) != 0) {
flags |= OldIterator;