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Mps master: arenavm.c: (diagnostic variety only; integ from br/vmem) fix floating point exception when a collection condemns 0 bytes.

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(The VMCompact diag was calculating the live percentage by dividing by condemned size.  Don't do this if condemned is zero.)

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 Change: 172778
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This commit is contained in:
Richard Kistruck 2010-11-06 21:11:14 +00:00
commit b2c677bb5d
1 changed files with 5 additions and 2 deletions
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7
mps/code/arenavm.c
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@ -1676,8 +1676,11 @@ static void VMCompact(Arena arena, Trace trace)
Size vmem2 = VMArenaReserved(arena);
Size vmemD = vmem1 - vmem2;
Size live = trace->forwardedSize + trace->preservedInPlaceSize;
Size livePerc = live / (trace->condemned / 100);
Size livePerc = 0;
if(trace->condemned / 100 != 0)
livePerc = live / (trace->condemned / 100);
/* VMCompact diag: emit for all client-requested collections, */
/* plus any others where chunks were gained or lost during the */
/* collection. */