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runtime: fix crash if user sets MemProfileRate=0

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R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5284044
This commit is contained in:
Dmitriy Vyukov 2011-10-16 10:49:24 +03:00
parent fc61ea3ba3
commit 1135fc3978
1 changed files with 2 additions and 1 deletions
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src/pkg/runtime/malloc.goc
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@ -220,6 +220,7 @@ runtime·allocmcache(void)
rate = runtime·MemProfileRate;
if(rate > 0x3fffffff) // make 2*rate not overflow
rate = 0x3fffffff;
if(rate != 0)
c->next_sample = runtime·fastrand1() % (2*rate);
return c;