/* deb.c
*
- * Copyright (c) 1991-2000, Larry Wall
+ * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
+ * 2002, 2003, 2004, 2005, 2006, 2007, 2008 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.
*/
/*
- * "Didst thou think that the eyes of the White Tower were blind? Nay, I
- * have seen more than thou knowest, Gray Fool." --Denethor
+ * 'Didst thou think that the eyes of the White Tower were blind? Nay,
+ * I have seen more than thou knowest, Grey Fool.' --Denethor
+ *
+ * [p.853 of _The Lord of the Rings_, V/vii: "The Pyre of Denethor"]
+ */
+
+/*
+ * This file contains various utilities for producing debugging output
+ * (mainly related to displaying the stack)
*/
#include "EXTERN.h"
#ifdef DEBUGGING
dTHX;
va_list args;
+ PERL_ARGS_ASSERT_DEB_NOCONTEXT;
va_start(args, pat);
vdeb(pat, &args);
va_end(args);
+#else
+ PERL_UNUSED_ARG(pat);
#endif /* DEBUGGING */
}
#endif
void
Perl_deb(pTHX_ const char *pat, ...)
{
-#ifdef DEBUGGING
va_list args;
+ PERL_ARGS_ASSERT_DEB;
va_start(args, pat);
+#ifdef DEBUGGING
vdeb(pat, &args);
- va_end(args);
+#else
+ PERL_UNUSED_CONTEXT;
#endif /* DEBUGGING */
+ va_end(args);
}
void
Perl_vdeb(pTHX_ const char *pat, va_list *args)
{
#ifdef DEBUGGING
- dTHR;
- register I32 i;
- char* file = CopFILE(PL_curcop);
-
-#ifdef USE_THREADS
- PerlIO_printf(Perl_debug_log, "0x%"UVxf" (%s:%ld)\t",
- PTR2UV(thr),
- (file ? file : "<free>"),
- (long)CopLINE(PL_curcop));
-#else
- PerlIO_printf(Perl_debug_log, "(%s:%ld)\t", (file ? file : "<free>"),
- (long)CopLINE(PL_curcop));
-#endif /* USE_THREADS */
+ const char* const file = PL_curcop ? OutCopFILE(PL_curcop) : "<null>";
+ const char* const display_file = file ? file : "<free>";
+ const long line = PL_curcop ? (long)CopLINE(PL_curcop) : 0;
+
+ PERL_ARGS_ASSERT_VDEB;
+
+ if (DEBUG_v_TEST)
+ PerlIO_printf(Perl_debug_log, "(%ld:%s:%ld)\t",
+ (long)PerlProc_getpid(), display_file, line);
+ else
+ PerlIO_printf(Perl_debug_log, "(%s:%ld)\t", display_file, line);
(void) PerlIO_vprintf(Perl_debug_log, pat, *args);
+#else
+ PERL_UNUSED_CONTEXT;
+ PERL_UNUSED_ARG(pat);
+ PERL_UNUSED_ARG(args);
#endif /* DEBUGGING */
}
Perl_debstackptrs(pTHX)
{
#ifdef DEBUGGING
- dTHR;
PerlIO_printf(Perl_debug_log,
- "%8"UVxf" %8"UVxf" %8"IVdf" %8"IVdf" %8"IVdf"\n",
+ "%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",
+ "%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)));
+#else
+ PERL_UNUSED_CONTEXT;
#endif /* DEBUGGING */
return 0;
}
-I32
-Perl_debstack(pTHX)
+
+/* 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)
{
#ifdef DEBUGGING
- dTHR;
- I32 top = PL_stack_sp - PL_stack_base;
- register I32 i = top - 30;
- I32 *markscan = PL_markstack + PL_curstackinfo->si_markoff;
+ I32 i = stack_max - 30;
+ const I32 *markscan = PL_markstack + mark_min;
+
+ PERL_ARGS_ASSERT_DEB_STACK_N;
- if (i < 0)
- i = 0;
+ if (i < stack_min)
+ i = stack_min;
- while (++markscan <= PL_markstack_ptr)
+ while (++markscan <= PL_markstack + mark_max)
if (*markscan >= i)
break;
-#ifdef USE_THREADS
- PerlIO_printf(Perl_debug_log,
- i ? "0x%"UVxf" => ... " : "0x%lx => ",
- PTR2UV(thr));
-#else
- PerlIO_printf(Perl_debug_log, i ? " => ... " : " => ");
-#endif /* USE_THREADS */
- if (PL_stack_base[0] != &PL_sv_undef || PL_stack_sp < PL_stack_base)
+ 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_ptr && *markscan < i) {
+ if (markscan <= PL_markstack + mark_max && *markscan < i) {
do {
++markscan;
- PerlIO_putc(Perl_debug_log, '*');
+ (void)PerlIO_putc(Perl_debug_log, '*');
}
- while (markscan <= PL_markstack_ptr && *markscan < i);
+ while (markscan <= PL_markstack + mark_max && *markscan < i);
PerlIO_printf(Perl_debug_log, " ");
}
- if (i > top)
+ if (i > stack_max)
break;
- PerlIO_printf(Perl_debug_log, "%-4s ", SvPEEK(PL_stack_base[i]));
+ PerlIO_printf(Perl_debug_log, "%-4s ", SvPEEK(stack_base[i]));
}
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
+ 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",
+ "MULTICALL"
+};
+#endif
+
+/* display all stacks */
+
+
+void
+Perl_deb_stack_all(pTHX)
+{
+#ifdef DEBUGGING
+ 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 size_t si_name_ix = si->si_type+1; /* -1 is a valid index */
+ const char * const si_name =
+ si_name_ix < C_ARRAY_LENGTH(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 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 argument stack per SI, so only
+ * search this one */
+
+ for (i=ix+1; i<=si->si_cxix; i++) {
+ const PERL_CONTEXT *this_cx = &(si->si_cxstack[i]);
+ if (CxTYPE(this_cx) == CXt_SUBST)
+ continue;
+ cx_n = this_cx;
+ 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 markstack, 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 = 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 */
+}
+
+/*
+ * ex: set ts=8 sts=4 sw=4 et:
+ */
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