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[perl5.git] / run.c
1 /*    run.c
2  *
3  *    Copyright (c) 1991-2001, Larry Wall
4  *
5  *    You may distribute under the terms of either the GNU General Public
6  *    License or the Artistic License, as specified in the README file.
7  *
8  */
9
10 #include "EXTERN.h"
11 #define PERL_IN_RUN_C
12 #include "perl.h"
13
14 /*
15  * "Away now, Shadowfax!  Run, greatheart, run as you have never run before!
16  * Now we are come to the lands where you were foaled, and every stone you
17  * know.  Run now!  Hope is in speed!"  --Gandalf
18  */
19
20 int
21 Perl_runops_standard(pTHX)
22 {
23     while ((PL_op = CALL_FPTR(PL_op->op_ppaddr)(aTHX))) {
24         PERL_ASYNC_CHECK();
25     }
26
27     TAINT_NOT;
28     return 0;
29 }
30
31 int
32 Perl_runops_debug(pTHX)
33 {
34 #ifdef DEBUGGING
35     if (!PL_op) {
36         if (ckWARN_d(WARN_DEBUGGING))
37             Perl_warner(aTHX_ WARN_DEBUGGING, "NULL OP IN RUN");
38         return 0;
39     }
40
41     do {
42         PERL_ASYNC_CHECK();
43         if (PL_debug) {
44             if (PL_watchaddr != 0 && *PL_watchaddr != PL_watchok)
45                 PerlIO_printf(Perl_debug_log,
46                               "WARNING: %"UVxf" changed from %"UVxf" to %"UVxf"\n",
47                               PTR2UV(PL_watchaddr), PTR2UV(PL_watchok),
48                               PTR2UV(*PL_watchaddr));
49             DEBUG_s(debstack());
50             DEBUG_t(debop(PL_op));
51             DEBUG_P(debprof(PL_op));
52         }
53     } while ((PL_op = CALL_FPTR(PL_op->op_ppaddr)(aTHX)));
54
55     TAINT_NOT;
56     return 0;
57 #else
58     return runops_standard();
59 #endif  /* DEBUGGING */
60 }
61
62 I32
63 Perl_debop(pTHX_ OP *o)
64 {
65 #ifdef DEBUGGING
66     SV *sv;
67     STRLEN n_a;
68     Perl_deb(aTHX_ "%s", PL_op_name[o->op_type]);
69     switch (o->op_type) {
70     case OP_CONST:
71         PerlIO_printf(Perl_debug_log, "(%s)", SvPEEK(cSVOPo_sv));
72         break;
73     case OP_GVSV:
74     case OP_GV:
75         if (cGVOPo_gv) {
76             sv = NEWSV(0,0);
77             gv_fullname3(sv, cGVOPo_gv, Nullch);
78             PerlIO_printf(Perl_debug_log, "(%s)", SvPV(sv, n_a));
79             SvREFCNT_dec(sv);
80         }
81         else
82             PerlIO_printf(Perl_debug_log, "(NULL)");
83         break;
84     default:
85         break;
86     }
87     PerlIO_printf(Perl_debug_log, "\n");
88 #endif  /* DEBUGGING */
89     return 0;
90 }
91
92 void
93 Perl_watch(pTHX_ char **addr)
94 {
95 #ifdef DEBUGGING
96     PL_watchaddr = addr;
97     PL_watchok = *addr;
98     PerlIO_printf(Perl_debug_log, "WATCHING, %"UVxf" is currently %"UVxf"\n",
99         PTR2UV(PL_watchaddr), PTR2UV(PL_watchok));
100 #endif  /* DEBUGGING */
101 }
102
103 STATIC void
104 S_debprof(pTHX_ OP *o)
105 {
106 #ifdef DEBUGGING
107     if (!PL_profiledata)
108         Newz(000, PL_profiledata, MAXO, U32);
109     ++PL_profiledata[o->op_type];
110 #endif /* DEBUGGING */
111 }
112
113 void
114 Perl_debprofdump(pTHX)
115 {
116 #ifdef DEBUGGING
117     unsigned i;
118     if (!PL_profiledata)
119         return;
120     for (i = 0; i < MAXO; i++) {
121         if (PL_profiledata[i])
122             PerlIO_printf(Perl_debug_log,
123                           "%5lu %s\n", (unsigned long)PL_profiledata[i],
124                                        PL_op_name[i]);
125     }
126 #endif  /* DEBUGGING */
127 }