X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/ffb9ee5f5f9d80d28ce950a2ff357650c8f1cc03..83bcbc6111ed334f239986aa6a0f00a47b523a0c:/run.c

diff --git a/run.c b/run.c
index 1b1e72b..1a62e9d 100644
--- a/run.c
+++ b/run.c
@@ -1,138 +1,52 @@
 /*    run.c
  *
- *    Copyright (c) 1991-2001, 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 Palantír"]
  */
 
 int
 Perl_runops_standard(pTHX)
 {
-    while ((PL_op = CALL_FPTR(PL_op->op_ppaddr)(aTHX))) {
-	PERL_ASYNC_CHECK();
+    OP *op = PL_op;
+    OP_ENTRY_PROBE(OP_NAME(op));
+    while ((PL_op = op = op->op_ppaddr(aTHX))) {
+        OP_ENTRY_PROBE(OP_NAME(op));
     }
+    PERL_ASYNC_CHECK();
 
     TAINT_NOT;
     return 0;
 }
 
-int
-Perl_runops_debug(pTHX)
-{
-#ifdef DEBUGGING
-    if (!PL_op) {
-	if (ckWARN_d(WARN_DEBUGGING))
-	    Perl_warner(aTHX_ WARN_DEBUGGING, "NULL OP IN RUN");
-	return 0;
-    }
-
-    do {
-	PERL_ASYNC_CHECK();
-	if (PL_debug) {
-	    if (PL_watchaddr != 0 && *PL_watchaddr != PL_watchok)
-		PerlIO_printf(Perl_debug_log,
-			      "WARNING: %"UVxf" changed from %"UVxf" to %"UVxf"\n",
-			      PTR2UV(PL_watchaddr), PTR2UV(PL_watchok),
-			      PTR2UV(*PL_watchaddr));
-	    DEBUG_s(debstack());
-	    DEBUG_t(debop(PL_op));
-	    DEBUG_P(debprof(PL_op));
-	}
-    } while ((PL_op = CALL_FPTR(PL_op->op_ppaddr)(aTHX)));
-
-    TAINT_NOT;
-    return 0;
-#else
-    return runops_standard();
-#endif	/* DEBUGGING */
-}
-
-I32
-Perl_debop(pTHX_ OP *o)
-{
-#ifdef DEBUGGING
-    SV *sv;
-    SV **svp;
-    STRLEN n_a;
-    Perl_deb(aTHX_ "%s", PL_op_name[o->op_type]);
-    switch (o->op_type) {
-    case OP_CONST:
-	PerlIO_printf(Perl_debug_log, "(%s)", SvPEEK(cSVOPo_sv));
-	break;
-    case OP_GVSV:
-    case OP_GV:
-	if (cGVOPo_gv) {
-	    sv = NEWSV(0,0);
-	    gv_fullname3(sv, cGVOPo_gv, Nullch);
-	    PerlIO_printf(Perl_debug_log, "(%s)", SvPV(sv, n_a));
-	    SvREFCNT_dec(sv);
-	}
-	else
-	    PerlIO_printf(Perl_debug_log, "(NULL)");
-	break;
-    case OP_PADSV:
-    case OP_PADAV:
-    case OP_PADHV:
-	/* print the lexical's name */
-	svp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
-	if (svp)
-	    PerlIO_printf(Perl_debug_log, "(%s)", SvPV(*svp,n_a));
-	else
-           PerlIO_printf(Perl_debug_log, "[%"UVuf"]", (UV)o->op_targ);
-	break;
-    default:
-	break;
-    }
-    PerlIO_printf(Perl_debug_log, "\n");
-#endif	/* DEBUGGING */
-    return 0;
-}
-
-void
-Perl_watch(pTHX_ char **addr)
-{
-#ifdef DEBUGGING
-    PL_watchaddr = addr;
-    PL_watchok = *addr;
-    PerlIO_printf(Perl_debug_log, "WATCHING, %"UVxf" is currently %"UVxf"\n",
-	PTR2UV(PL_watchaddr), PTR2UV(PL_watchok));
-#endif	/* DEBUGGING */
-}
-
-STATIC void
-S_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 */
-}
+/*
+ * ex: set ts=8 sts=4 sw=4 et:
+ */