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Fix ITERN loop detection when hook checks are enabled.

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Reported by Myria.
This commit is contained in:
Mike Pall 2022-06-02 13:18:10 +02:00
parent 1b8d8cabdc
commit d4b6bb80ea
1 changed files with 10 additions and 5 deletions
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9
src/lj_record.c
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@ -664,13 +664,18 @@ static LoopEvent rec_itern(jit_State *J, BCReg ra, BCReg rb)
RecordIndex ix;
/* Since ITERN is recorded at the start, we need our own loop detection. */
if (J->pc == J->startpc &&
(J->cur.nins > REF_FIRST+1 ||
(J->cur.nins == REF_FIRST+1 && J->cur.ir[REF_FIRST].o != IR_PROF)) &&
J->framedepth + J->retdepth == 0 && J->parent == 0 && J->exitno == 0) {
IRRef ref = REF_FIRST + LJ_HASPROFILE;
#ifdef LUAJIT_ENABLE_CHECKHOOK
ref += 3;
#endif
if (J->cur.nins > ref ||
(LJ_HASPROFILE && J->cur.nins == ref && J->cur.ir[ref-1].o != IR_PROF)) {
J->instunroll = 0; /* Cannot continue unrolling across an ITERN. */
lj_record_stop(J, LJ_TRLINK_LOOP, J->cur.traceno); /* Looping trace. */
return LOOPEV_ENTER;
}
}
J->maxslot = ra;
lj_snap_add(J); /* Required to make JLOOP the first ins in a side-trace. */
ix.tab = getslot(J, ra-2);