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runtime: hide mheap from race detector

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This significantly decreases amount of shadow memory
mapped by race detector.
I haven't tested on Windows, but on Linux it reduces
virtual memory size from 1351m to 330m for fmt.test.
Fixes #4379.

R=golang-dev, alex.brainman, iant
CC=golang-dev
https://golang.org/cl/6849057
This commit is contained in:
Dmitriy Vyukov 2012-11-16 20:06:11 +04:00
parent aa3d05acc9
commit 8f82bff545
1 changed files with 8 additions and 1 deletions
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9
src/pkg/runtime/race.c
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@ -34,9 +34,16 @@ static bool onstack(uintptr argp);
void
runtime·raceinit(void)
{
uintptr sz;
m->racecall = true;
runtime∕race·Initialize();
runtime∕race·MapShadow(noptrdata, enoptrbss - noptrdata);
sz = (byte*)&runtime·mheap - noptrdata;
if(sz)
runtime∕race·MapShadow(noptrdata, sz);
sz = enoptrbss - (byte*)(&runtime·mheap+1);
if(sz)
runtime∕race·MapShadow(&runtime·mheap+1, sz);
m->racecall = false;
}