/* run.c
*
- * Copyright (c) 1991-1999, Larry Wall
+ * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ * 2000, 2001, 2004, 2005, 2006, by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
+/* This file contains the main Perl opcode execution loop. It just
+ * calls the pp_foo() function associated with each op, and expects that
+ * function to return a pointer to the next op to be executed, or null if
+ * it's the end of the sub or program or whatever.
+ *
+ * There is a similar loop in dump.c, Perl_runops_debug(), which does
+ * the same, but also checks for various debug flags each time round the
+ * loop.
+ *
+ * Why this function requires a file all of its own is anybody's guess.
+ * DAPM.
+ */
+
#include "EXTERN.h"
#define PERL_IN_RUN_C
#include "perl.h"
/*
- * "Away now, Shadowfax! Run, greatheart, run as you have never run before!
- * Now we are come to the lands where you were foaled, and every stone you
- * know. Run now! Hope is in speed!" --Gandalf
+ * 'Away now, Shadowfax! Run, greatheart, run as you have never run before!
+ * Now we are come to the lands where you were foaled, and every stone you
+ * know. Run now! Hope is in speed!' --Gandalf
+ *
+ * [p.600 of _The Lord of the Rings_, III/xi: "The PalantÃr"]
*/
-#ifdef PERL_OBJECT
-#define CALLOP this->*PL_op
-#else
-#define CALLOP *PL_op
-#endif
-
int
Perl_runops_standard(pTHX)
{
- dTHR;
-
- while ( PL_op = (CALLOP->op_ppaddr)(ARGS) ) ;
-
- TAINT_NOT;
- return 0;
-}
-
-int
-Perl_runops_debug(pTHX)
-{
-#ifdef DEBUGGING
- dTHR;
- if (!PL_op) {
- warn("NULL OP IN RUN");
- return 0;
+ dVAR;
+ register OP *op = PL_op;
+ while ((PL_op = op = CALL_FPTR(op->op_ppaddr)(aTHX))) {
}
- do {
- if (PL_debug) {
- if (PL_watchaddr != 0 && *PL_watchaddr != PL_watchok)
- PerlIO_printf(Perl_debug_log, "WARNING: %lx changed from %lx to %lx\n",
- (long)PL_watchaddr, (long)PL_watchok, (long)*PL_watchaddr);
- DEBUG_s(debstack());
- DEBUG_t(debop(PL_op));
- DEBUG_P(debprof(PL_op));
- }
- } while ( PL_op = (CALLOP->op_ppaddr)(ARGS) );
-
TAINT_NOT;
return 0;
-#else
- return runops_standard();
-#endif /* DEBUGGING */
-}
-
-I32
-Perl_debop(pTHX_ OP *o)
-{
-#ifdef DEBUGGING
- SV *sv;
- STRLEN n_a;
- deb("%s", PL_op_name[o->op_type]);
- switch (o->op_type) {
- case OP_CONST:
- PerlIO_printf(Perl_debug_log, "(%s)", SvPEEK(cSVOPo->op_sv));
- break;
- case OP_GVSV:
- case OP_GV:
- if (cGVOPo->op_gv) {
- sv = NEWSV(0,0);
- gv_fullname3(sv, cGVOPo->op_gv, Nullch);
- PerlIO_printf(Perl_debug_log, "(%s)", SvPV(sv, n_a));
- SvREFCNT_dec(sv);
- }
- else
- PerlIO_printf(Perl_debug_log, "(NULL)");
- break;
- default:
- break;
- }
- PerlIO_printf(Perl_debug_log, "\n");
-#endif /* DEBUGGING */
- return 0;
-}
-
-void
-Perl_watch(pTHX_ char **addr)
-{
-#ifdef DEBUGGING
- dTHR;
- PL_watchaddr = addr;
- PL_watchok = *addr;
- PerlIO_printf(Perl_debug_log, "WATCHING, %lx is currently %lx\n",
- (long)PL_watchaddr, (long)PL_watchok);
-#endif /* DEBUGGING */
-}
-
-STATIC void
-debprof(pTHX_ OP *o)
-{
-#ifdef DEBUGGING
- if (!PL_profiledata)
- Newz(000, PL_profiledata, MAXO, U32);
- ++PL_profiledata[o->op_type];
-#endif /* DEBUGGING */
}
-void
-Perl_debprofdump(pTHX)
-{
-#ifdef DEBUGGING
- unsigned i;
- if (!PL_profiledata)
- return;
- for (i = 0; i < MAXO; i++) {
- if (PL_profiledata[i])
- PerlIO_printf(Perl_debug_log,
- "%5lu %s\n", (unsigned long)PL_profiledata[i],
- PL_op_name[i]);
- }
-#endif /* DEBUGGING */
-}
+/*
+ * Local variables:
+ * c-indentation-style: bsd
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ *
+ * ex: set ts=8 sts=4 sw=4 noet:
+ */