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runtime: improve precision of GC_REGION

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R=rsc
CC=golang-dev
https://golang.org/cl/7383054
This commit is contained in:
Jan Ziak 2013-02-27 08:28:53 -08:00 committed by Russ Cox
parent 5a09f1b3be
commit 01ab9a012a
1 changed files with 7 additions and 2 deletions
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9
src/pkg/runtime/mgc0.c
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@ -546,7 +546,7 @@ static void
scanblock(Workbuf *wbuf, Obj *wp, uintptr nobj, bool keepworking)
{
byte *b, *arena_start, *arena_used;
uintptr n, i, end_b, elemsize, ti, objti, count, type;
uintptr n, i, end_b, elemsize, size, ti, objti, count, type;
uintptr *pc, precise_type, nominal_size;
uintptr *map_ret, mapkey_size, mapval_size, mapkey_ti, mapval_ti;
void *obj;
@ -905,9 +905,14 @@ scanblock(Workbuf *wbuf, Obj *wp, uintptr nobj, bool keepworking)
continue;
case GC_REGION:
// TODO(atom): to be expanded in a next CL. Same as GC_APTR for now.
obj = (void*)(stack_top.b + pc[1]);
size = pc[2];
objti = pc[3];
pc += 4;
*objbufpos++ = (Obj){obj, size, objti};
if(objbufpos == objbuf_end)
flushobjbuf(objbuf, &objbufpos, &wp, &wbuf, &nobj);
break;
case GC_CHAN: