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Fix js_AllocStack to null new space (cheapest way to save last-ditch GC from scanning uninitialized stack space; 290476, r=shaver, a=me).

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brendan%mozilla.org 2005-04-15 16:01:20 +00:00
parent 20572e768b
commit 743092df0c
1 changed files with 6 additions and 0 deletions
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6
js/src/jsinterp.c
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@ -407,6 +407,12 @@ js_AllocStack(JSContext *cx, uintN nslots, void **markp)
sp += 2;
}
/*
* Store JSVAL_NULL using memset, to let compilers optimize as they see
* fit, in case a caller allocates and pushes GC-things one by one, which
* could nest a last-ditch GC that will scan this segment.
*/
memset(sp, 0, nslots * sizeof(jsval));
return sp;
}