-/* $RCSfile: op.c,v $$Revision: 4.1 $$Date: 92/08/07 17:19:16 $
+/* deb.c
*
- * Copyright (c) 1991, Larry Wall
+ * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999,
+ * 2000, 2001, 2002, 2003, 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.
*
- * $Log: op.c,v $
- * Revision 4.1 92/08/07 17:19:16 lwall
- * Stage 6 Snapshot
- *
- * Revision 4.0.1.5 92/06/08 12:00:39 lwall
- * patch20: the switch optimizer didn't do anything in subroutines
- * patch20: removed implicit int declarations on funcions
- *
- * Revision 4.0.1.4 91/11/11 16:29:33 lwall
- * patch19: do {$foo ne "bar";} returned wrong value
- * patch19: some earlier patches weren't propagated to alternate 286 code
- *
- * Revision 4.0.1.3 91/11/05 16:07:43 lwall
- * patch11: random cleanup
- * patch11: "foo\0" eq "foo" was sometimes optimized to true
- * patch11: foreach on null list could spring memory leak
- *
- * Revision 4.0.1.2 91/06/07 10:26:45 lwall
- * patch4: new copyright notice
- * patch4: made some allowances for "semi-standard" C
- *
- * Revision 4.0.1.1 91/04/11 17:36:16 lwall
- * patch1: you may now use "die" and "caller" in a signal handler
- *
- * Revision 4.0 91/03/20 01:04:18 lwall
- * 4.0 baseline.
- *
*/
-#include "EXTERN.h"
-#include "perl.h"
+/*
+ * "Didst thou think that the eyes of the White Tower were blind? Nay, I
+ * have seen more than thou knowest, Gray Fool." --Denethor
+ */
-#ifdef I_VARARGS
-# include <varargs.h>
-#endif
+/*
+ * This file contains various utilities for producing debugging output
+ * (mainly related to displaying the stack)
+ */
-void deb_growlevel();
+#include "EXTERN.h"
+#define PERL_IN_DEB_C
+#include "perl.h"
-# ifndef I_VARARGS
-/*VARARGS1*/
-void deb(pat,a1,a2,a3,a4,a5,a6,a7,a8)
-char *pat;
+#if defined(PERL_IMPLICIT_CONTEXT)
+void
+Perl_deb_nocontext(const char *pat, ...)
{
- register I32 i;
-
- fprintf(stderr,"%-4ld",(long)curop->cop_line);
- for (i=0; i<dlevel; i++)
- fprintf(stderr,"%c%c ",debname[i],debdelim[i]);
- fprintf(stderr,pat,a1,a2,a3,a4,a5,a6,a7,a8);
-}
-# else
-/*VARARGS1*/
-#ifdef __STDC__
-void deb(char *pat,...)
+#ifdef DEBUGGING
+ dTHX;
+ va_list args;
+ va_start(args, pat);
+ vdeb(pat, &args);
+ va_end(args);
#else
-void deb(va_alist)
-va_dcl
+ PERL_UNUSED_ARG(pat);
+#endif /* DEBUGGING */
+}
#endif
+
+void
+Perl_deb(pTHX_ const char *pat, ...)
{
+#ifdef DEBUGGING
va_list args;
- char *pat;
- register I32 i;
-
- va_start(args);
- fprintf(stderr,"%-4ld",(long)curcop->cop_line);
- for (i=0; i<dlevel; i++)
- fprintf(stderr,"%c%c ",debname[i],debdelim[i]);
-
- pat = va_arg(args, char *);
- (void) vfprintf(stderr,pat,args);
- va_end( args );
+ va_start(args, pat);
+ vdeb(pat, &args);
+ va_end(args);
+#else
+ PERL_UNUSED_CONTEXT;
+ PERL_UNUSED_ARG(pat);
+#endif /* DEBUGGING */
}
-# endif
void
-deb_growlevel()
+Perl_vdeb(pTHX_ const char *pat, va_list *args)
{
- dlmax += 128;
- Renew(debname, dlmax, char);
- Renew(debdelim, dlmax, char);
+#ifdef DEBUGGING
+ dVAR;
+ const char* const file = OutCopFILE(PL_curcop);
+
+ PerlIO_printf(Perl_debug_log, "(%s:%ld)\t", (file ? file : "<free>"),
+ (long)CopLINE(PL_curcop));
+ (void) PerlIO_vprintf(Perl_debug_log, pat, *args);
+#else
+ PERL_UNUSED_CONTEXT;
+ PERL_UNUSED_ARG(pat);
+ PERL_UNUSED_ARG(args);
+#endif /* DEBUGGING */
}
I32
-debstackptrs()
+Perl_debstackptrs(pTHX)
{
- fprintf(stderr, "%8lx %8lx %8ld %8ld %8ld\n",
- stack, stack_base, *markstack_ptr, stack_sp-stack_base, stack_max-stack_base);
- fprintf(stderr, "%8lx %8lx %8ld %l8d %8ld\n",
- mainstack, AvARRAY(stack), mainstack, AvFILL(stack), AvMAX(stack));
+#ifdef DEBUGGING
+ dVAR;
+ PerlIO_printf(Perl_debug_log,
+ "%8"UVxf" %8"UVxf" %8"IVdf" %8"IVdf" %8"IVdf"\n",
+ PTR2UV(PL_curstack), PTR2UV(PL_stack_base),
+ (IV)*PL_markstack_ptr, (IV)(PL_stack_sp-PL_stack_base),
+ (IV)(PL_stack_max-PL_stack_base));
+ PerlIO_printf(Perl_debug_log,
+ "%8"UVxf" %8"UVxf" %8"UVuf" %8"UVuf" %8"UVuf"\n",
+ PTR2UV(PL_mainstack), PTR2UV(AvARRAY(PL_curstack)),
+ PTR2UV(PL_mainstack), PTR2UV(AvFILLp(PL_curstack)),
+ PTR2UV(AvMAX(PL_curstack)));
+#endif /* DEBUGGING */
return 0;
}
-I32
-debstack()
+
+/* dump the contents of a particular stack
+ * Display stack_base[stack_min+1 .. stack_max],
+ * and display the marks whose offsets are contained in addresses
+ * PL_markstack[mark_min+1 .. mark_max] and whose values are in the range
+ * of the stack values being displayed
+ *
+ * Only displays top 30 max
+ */
+
+STATIC void
+S_deb_stack_n(pTHX_ SV** stack_base, I32 stack_min, I32 stack_max,
+ I32 mark_min, I32 mark_max)
{
- register I32 i;
- I32 markoff = markstack_ptr > markstack ? *markstack_ptr : -1;
-
- fprintf(stderr, " =>");
- if (stack_base[0] || stack_sp < stack_base)
- fprintf(stderr, " [STACK UNDERFLOW!!!]\n");
- for (i = 1; i <= 30; i++) {
- if (stack_sp >= &stack_base[i])
- {
- fprintf(stderr, "\t%-4s%s%s", SvPEEK(stack_base[i]),
- markoff == i ? " [" : "",
- stack_sp == &stack_base[i] ?
- (markoff == i ? "]" : " ]") : "");
+#ifdef DEBUGGING
+ dVAR;
+ register I32 i = stack_max - 30;
+ const I32 *markscan = PL_markstack + mark_min;
+ if (i < stack_min)
+ i = stack_min;
+
+ while (++markscan <= PL_markstack + mark_max)
+ if (*markscan >= i)
+ break;
+
+ if (i > stack_min)
+ PerlIO_printf(Perl_debug_log, "... ");
+
+ if (stack_base[0] != &PL_sv_undef || stack_max < 0)
+ PerlIO_printf(Perl_debug_log, " [STACK UNDERFLOW!!!]\n");
+ do {
+ ++i;
+ if (markscan <= PL_markstack + mark_max && *markscan < i) {
+ do {
+ ++markscan;
+ PerlIO_putc(Perl_debug_log, '*');
+ }
+ while (markscan <= PL_markstack + mark_max && *markscan < i);
+ PerlIO_printf(Perl_debug_log, " ");
}
+ if (i > stack_max)
+ break;
+ PerlIO_printf(Perl_debug_log, "%-4s ", SvPEEK(stack_base[i]));
}
- fprintf(stderr, "\n");
+ while (1);
+ PerlIO_printf(Perl_debug_log, "\n");
+#else
+ PERL_UNUSED_CONTEXT;
+ PERL_UNUSED_ARG(stack_base);
+ PERL_UNUSED_ARG(stack_min);
+ PERL_UNUSED_ARG(stack_max);
+ PERL_UNUSED_ARG(mark_min);
+ PERL_UNUSED_ARG(mark_max);
+#endif /* DEBUGGING */
+}
+
+
+/* dump the current stack */
+
+I32
+Perl_debstack(pTHX)
+{
+#ifndef SKIP_DEBUGGING
+ dVAR;
+ if (CopSTASH_eq(PL_curcop, PL_debstash) && !DEBUG_J_TEST_)
+ return 0;
+
+ PerlIO_printf(Perl_debug_log, " => ");
+ deb_stack_n(PL_stack_base,
+ 0,
+ PL_stack_sp - PL_stack_base,
+ PL_curstackinfo->si_markoff,
+ PL_markstack_ptr - PL_markstack);
+
+
+#endif /* SKIP_DEBUGGING */
return 0;
}
+
+
+#ifdef DEBUGGING
+static const char * const si_names[] = {
+ "UNKNOWN",
+ "UNDEF",
+ "MAIN",
+ "MAGIC",
+ "SORT",
+ "SIGNAL",
+ "OVERLOAD",
+ "DESTROY",
+ "WARNHOOK",
+ "DIEHOOK",
+ "REQUIRE"
+};
+#endif
+
+/* display all stacks */
+
+
+void
+Perl_deb_stack_all(pTHX)
+{
+#ifdef DEBUGGING
+ dVAR;
+ I32 si_ix;
+ const PERL_SI *si;
+
+ /* rewind to start of chain */
+ si = PL_curstackinfo;
+ while (si->si_prev)
+ si = si->si_prev;
+
+ si_ix=0;
+ for (;;)
+ {
+ const int si_name_ix = si->si_type+1; /* -1 is a valid index */
+ const char * const si_name = (si_name_ix>= sizeof(si_names)) ? "????" : si_names[si_name_ix];
+ I32 ix;
+ PerlIO_printf(Perl_debug_log, "STACK %"IVdf": %s\n",
+ (IV)si_ix, si_name);
+
+ for (ix=0; ix<=si->si_cxix; ix++) {
+
+ const PERL_CONTEXT * const cx = &(si->si_cxstack[ix]);
+ PerlIO_printf(Perl_debug_log,
+ " CX %"IVdf": %-6s => ",
+ (IV)ix, PL_block_type[CxTYPE(cx)]
+ );
+ /* substitution contexts don't save stack pointers etc) */
+ if (CxTYPE(cx) == CXt_SUBST)
+ PerlIO_printf(Perl_debug_log, "\n");
+ else {
+
+ /* Find the the current context's stack range by searching
+ * forward for any higher contexts using this stack; failing
+ * that, it will be equal to the size of the stack for old
+ * stacks, or PL_stack_sp for the current stack
+ */
+
+ I32 i, stack_min, stack_max, mark_min, mark_max;
+ const PERL_CONTEXT *cx_n = NULL;
+ const PERL_SI *si_n;
+
+ /* there's a separate stack per SI, so only search
+ * this one */
+
+ for (i=ix+1; i<=si->si_cxix; i++) {
+ if (CxTYPE(cx) == CXt_SUBST)
+ continue;
+ cx_n = &(si->si_cxstack[i]);
+ break;
+ }
+
+ stack_min = cx->blk_oldsp;
+
+ if (cx_n) {
+ stack_max = cx_n->blk_oldsp;
+ }
+ else if (si == PL_curstackinfo) {
+ stack_max = PL_stack_sp - AvARRAY(si->si_stack);
+ }
+ else {
+ stack_max = AvFILLp(si->si_stack);
+ }
+
+ /* for the other stack types, there's only one stack
+ * shared between all SIs */
+
+ si_n = si;
+ i = ix;
+ cx_n = NULL;
+ for (;;) {
+ i++;
+ if (i > si_n->si_cxix) {
+ if (si_n == PL_curstackinfo)
+ break;
+ else {
+ si_n = si_n->si_next;
+ i = 0;
+ }
+ }
+ if (CxTYPE(&(si_n->si_cxstack[i])) == CXt_SUBST)
+ continue;
+ cx_n = &(si_n->si_cxstack[i]);
+ break;
+ }
+
+ mark_min = cx->blk_oldmarksp;
+ if (cx_n) {
+ mark_max = cx_n->blk_oldmarksp;
+ }
+ else {
+ mark_max = PL_markstack_ptr - PL_markstack;
+ }
+
+ deb_stack_n(AvARRAY(si->si_stack),
+ stack_min, stack_max, mark_min, mark_max);
+
+ if (CxTYPE(cx) == CXt_EVAL || CxTYPE(cx) == CXt_SUB
+ || CxTYPE(cx) == CXt_FORMAT)
+ {
+ const OP * const retop = (CxTYPE(cx) == CXt_EVAL)
+ ? cx->blk_eval.retop : cx->blk_sub.retop;
+
+ PerlIO_printf(Perl_debug_log, " retop=%s\n",
+ retop ? OP_NAME(retop) : "(null)"
+ );
+ }
+ }
+ } /* next context */
+
+
+ if (si == PL_curstackinfo)
+ break;
+ si = si->si_next;
+ si_ix++;
+ if (!si)
+ break; /* shouldn't happen, but just in case.. */
+ } /* next stackinfo */
+
+ PerlIO_printf(Perl_debug_log, "\n");
+#else
+ PERL_UNUSED_CONTEXT;
+#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:
+ */
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