8 /* lifted from op.c (w/linklist -> Perl_linklist) */
10 #define LINKLIST(o) ((o)->op_next ? (o)->op_next : Perl_linklist((OP*)o))
12 /* pointer to old PL_check entersub entry to be populated in init */
14 STATIC OP *(*dbl_old_ck_entersub)(pTHX_ OP *op);
16 /* replacement PL_check entersub entry */
18 STATIC OP *dbl_ck_entersub(pTHX_ OP *o) {
23 I32 type = o->op_type;
27 SV** to_lift_pack_ref;
28 HV* to_lift_pack_hash;
29 SV** to_lift_flag_ref;
31 o = dbl_old_ck_entersub(aTHX_ o); /* let the original do its job */
33 kid = cUNOPo->op_first;
35 if (kid->op_type != OP_NULL) /* pushmark for method call ... */
38 last = kLISTOP->op_last;
40 if (last->op_type != OP_NULL) /* not what we expected */
43 kid = cUNOPx(last)->op_first;
45 if (kid->op_type != OP_GV) /* not a GV so ignore */
48 stash = GvSTASH(kGVOP_gv);
50 /* printf("Calling GV %s -> %s\n",
51 HvNAME(stash), GvNAME(kGVOP_gv)); */
53 to_lift = get_hv("Devel::BeginLift::lift", FALSE);
58 to_lift_pack_ref = hv_fetch(to_lift, HvNAME(stash), strlen(HvNAME(stash)),
61 if (!to_lift_pack_ref || !SvROK(*to_lift_pack_ref))
62 return o; /* not a hashref */
64 to_lift_pack_hash = (HV*) SvRV(*to_lift_pack_ref);
66 to_lift_flag_ref = hv_fetch(to_lift_pack_hash, GvNAME(kGVOP_gv),
67 strlen(GvNAME(kGVOP_gv)), FALSE);
69 if (!to_lift_flag_ref || !SvTRUE(*to_lift_flag_ref))
72 /* shamelessly lifted from fold_constants in op.c */
74 stack_save = PL_stack_sp;
80 if (PL_stack_sp > stack_save) { /* sub returned something */
81 sv = *(PL_stack_sp--);
82 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
83 pad_swipe(o->op_targ, FALSE);
84 else if (SvTEMP(sv)) { /* grab mortal temp? */
85 (void)SvREFCNT_inc(sv);
90 return newGVOP(OP_GV, 0, (GV*)sv);
91 return newSVOP(OP_CONST, 0, sv);
93 /* this bit not lifted, handles the 'sub doesn't return stuff' case
94 which fold_constants can ignore */
96 return newOP(OP_NULL, 0);
100 static int initialized = 0;
102 MODULE = Devel::BeginLift PACKAGE = Devel::BeginLift
109 if (!initialized++) {
110 dbl_old_ck_entersub = PL_check[OP_ENTERSUB];
111 PL_check[OP_ENTERSUB] = dbl_ck_entersub;
117 /* ensure we only uninit when number of teardown calls matches
118 number of setup calls */
119 if (initialized && !--initialized) {
120 PL_check[OP_ENTERSUB] = dbl_old_ck_entersub;