/* Recursively set the JIT mode for all children of a prototype. */
static void setptmode_all(global_State *g, GCproto *pt, int mode)
{
ptrdiff_t i;
for (i = -(ptrdiff_t)pt->sizekgc; i < 0; i++) {
GCobj *o = gcref(pt->k.gc[i]);
if (o->gch.gct == ~LJ_TPROTO) {
setptmode(g, gco2pt(o), mode);
setptmode_all(g, gco2pt(o), mode);
}
}
}
/* Recursively set the JIT mode for all children of a prototype. */
static void setptmode_all(global_State *g, GCproto *pt, int mode)
{
ptrdiff_t i;
if (!(pt->flags & PROTO_CHILD)) return;
for (i = -(ptrdiff_t)pt->sizekgc; i < 0; i++) {
GCobj *o = proto_kgc(pt, i);
if (o->gch.gct == ~LJ_TPROTO) {
setptmode(g, gco2pt(o), mode);
setptmode_all(g, gco2pt(o), mode);
}
}
}
/* Public API function: control the JIT engine. */
int luaJIT_setmode(lua_State *L, int idx, int mode)
{
global_State *g = G(L);
int mm = mode & LUAJIT_MODE_MASK;
lj_trace_abort(g); /* Abort recording on any state change. */
/* Avoid pulling the rug from under our own feet. */
if ((g->hookmask & HOOK_GC))
lj_err_caller(L, LJ_ERR_NOGCMM);
switch (mm) {
#if LJ_HASJIT
case LUAJIT_MODE_ENGINE:
if ((mode & LUAJIT_MODE_FLUSH)) {
lj_trace_flushall(L);
} else {
if (!(mode & LUAJIT_MODE_ON))
G2J(g)->flags &= ~(uint32_t)JIT_F_ON;
#if LJ_TARGET_X86ORX64
else if ((G2J(g)->flags & JIT_F_SSE2))
G2J(g)->flags |= (uint32_t)JIT_F_ON;
else
return 0; /* Don't turn on JIT compiler without SSE2 support. */
#else
else
G2J(g)->flags |= (uint32_t)JIT_F_ON;
#endif
lj_dispatch_update(g);
}
break;
case LUAJIT_MODE_FUNC:
case LUAJIT_MODE_ALLFUNC:
case LUAJIT_MODE_ALLSUBFUNC: {
cTValue *tv = idx == 0 ? frame_prev(L->base-1) :
idx > 0 ? L->base + (idx-1) : L->top + idx;
GCproto *pt;
if ((idx == 0 || tvisfunc(tv)) && isluafunc(&gcval(tv)->fn))
pt = funcproto(&gcval(tv)->fn); /* Cannot use funcV() for frame slot. */
else if (tvisproto(tv))
pt = protoV(tv);
else
return 0; /* Failed. */
if (mm != LUAJIT_MODE_ALLSUBFUNC)
setptmode(g, pt, mode);
if (mm != LUAJIT_MODE_FUNC)
setptmode_all(g, pt, mode);
break;
}
case LUAJIT_MODE_TRACE:
if (!(mode & LUAJIT_MODE_FLUSH))
return 0; /* Failed. */
lj_trace_flush(G2J(g), idx);
break;
#else
case LUAJIT_MODE_ENGINE:
case LUAJIT_MODE_FUNC:
case LUAJIT_MODE_ALLFUNC:
case LUAJIT_MODE_ALLSUBFUNC:
UNUSED(idx);
if ((mode & LUAJIT_MODE_ON))
return 0; /* Failed. */
break;
#endif
case LUAJIT_MODE_WRAPCFUNC:
if ((mode & LUAJIT_MODE_ON)) {
if (idx != 0) {
cTValue *tv = idx > 0 ? L->base + (idx-1) : L->top + idx;
if (tvislightud(tv))
g->wrapf = (lua_CFunction)lightudV(tv);
else
return 0; /* Failed. */
} else {
return 0; /* Failed. */
}
g->bc_cfunc_ext = BCINS_AD(BC_FUNCCW, 0, 0);
} else {
g->bc_cfunc_ext = BCINS_AD(BC_FUNCC, 0, 0);
}
break;
default:
return 0; /* Failed. */
}