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Fix maxslots when recording BC_VARG, part 2.

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Analyzed by Sergey Kaplun. #1024
This commit is contained in:
Mike Pall 2023-07-09 21:08:12 +02:00
parent 94ada59628
commit a01cba9d2d
1 changed files with 2 additions and 6 deletions
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8
src/lj_record.c
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@ -1518,12 +1518,8 @@ static void rec_varg(jit_State *J, BCReg dst, ptrdiff_t nresults)
if (J->framedepth > 0) { /* Simple case: varargs defined on-trace. */ if (J->framedepth > 0) { /* Simple case: varargs defined on-trace. */
ptrdiff_t i; ptrdiff_t i;
if (nvararg < 0) nvararg = 0; if (nvararg < 0) nvararg = 0;
if (nresults == -1) { if (nresults == -1) nresults = nvararg;
nresults = nvararg; J->maxslot = dst + (BCReg)nresults;
J->maxslot = dst + (BCReg)nvararg;
} else if (dst + nresults > J->maxslot) {
J->maxslot = dst + (BCReg)nresults;
}
if (J->baseslot + J->maxslot >= LJ_MAX_JSLOTS) if (J->baseslot + J->maxslot >= LJ_MAX_JSLOTS)
lj_trace_err(J, LJ_TRERR_STACKOV); lj_trace_err(J, LJ_TRERR_STACKOV);
for (i = 0; i < nresults; i++) for (i = 0; i < nresults; i++)