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FFI: Treat cdata metatable+methods as immutable in trace recorder.

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Mike Pall 2010-12-08 02:02:21 +01:00
parent d4d95ee2da
commit 2a917a9d83
1 changed files with 13 additions and 0 deletions
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13
src/lj_record.c
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@ -667,6 +667,19 @@ int lj_record_mm_lookup(jit_State *J, RecordIndex *ix, MMS mm)
ix->mt = TREF_NIL;
return 0; /* No metamethod. */
}
#if LJ_HASFFI
/* The cdata metatable is treated as immutable. */
if (tref_iscdata(ix->tab)) {
cTValue *mo = lj_tab_getstr(mt, mmname_str(J2G(J), mm));
if (!mo || tvisnil(mo))
return 0; /* No metamethod. */
setfuncV(J->L, &ix->mobjv, funcV(mo));
ix->mobj = lj_ir_kfunc(J, funcV(mo)); /* Immutable metamethod. */
ix->mtv = mt;
ix->mt = TREF_NIL; /* Dummy value for comparison semantics. */
return 1; /* Got cdata metamethod. */
}
#endif
ix->mt = mix.tab = lj_ir_ktab(J, mt);
goto nocheck;
}