3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "Didst thou think that the eyes of the White Tower were blind? Nay, I
13 * have seen more than thou knowest, Gray Fool." --Denethor
17 * This file contains various utilities for producing debugging output
18 * (mainly related to displaying the stack)
25 #if defined(PERL_IMPLICIT_CONTEXT)
27 Perl_deb_nocontext(const char *pat, ...)
32 PERL_ARGS_ASSERT_DEB_NOCONTEXT;
38 #endif /* DEBUGGING */
43 Perl_deb(pTHX_ const char *pat, ...)
52 #endif /* DEBUGGING */
57 Perl_vdeb(pTHX_ const char *pat, va_list *args)
61 const char* const file = PL_curcop ? OutCopFILE(PL_curcop) : "<null>";
62 const char* const display_file = file ? file : "<free>";
63 const long line = PL_curcop ? (long)CopLINE(PL_curcop) : 0;
65 PERL_ARGS_ASSERT_VDEB;
68 PerlIO_printf(Perl_debug_log, "(%ld:%s:%ld)\t",
69 (long)PerlProc_getpid(), display_file, line);
71 PerlIO_printf(Perl_debug_log, "(%s:%ld)\t", display_file, line);
72 (void) PerlIO_vprintf(Perl_debug_log, pat, *args);
76 PERL_UNUSED_ARG(args);
77 #endif /* DEBUGGING */
81 Perl_debstackptrs(pTHX)
85 PerlIO_printf(Perl_debug_log,
86 "%8"UVxf" %8"UVxf" %8"IVdf" %8"IVdf" %8"IVdf"\n",
87 PTR2UV(PL_curstack), PTR2UV(PL_stack_base),
88 (IV)*PL_markstack_ptr, (IV)(PL_stack_sp-PL_stack_base),
89 (IV)(PL_stack_max-PL_stack_base));
90 PerlIO_printf(Perl_debug_log,
91 "%8"UVxf" %8"UVxf" %8"UVuf" %8"UVuf" %8"UVuf"\n",
92 PTR2UV(PL_mainstack), PTR2UV(AvARRAY(PL_curstack)),
93 PTR2UV(PL_mainstack), PTR2UV(AvFILLp(PL_curstack)),
94 PTR2UV(AvMAX(PL_curstack)));
95 #endif /* DEBUGGING */
100 /* dump the contents of a particular stack
101 * Display stack_base[stack_min+1 .. stack_max],
102 * and display the marks whose offsets are contained in addresses
103 * PL_markstack[mark_min+1 .. mark_max] and whose values are in the range
104 * of the stack values being displayed
106 * Only displays top 30 max
110 S_deb_stack_n(pTHX_ SV** stack_base, I32 stack_min, I32 stack_max,
111 I32 mark_min, I32 mark_max)
115 register I32 i = stack_max - 30;
116 const I32 *markscan = PL_markstack + mark_min;
118 PERL_ARGS_ASSERT_DEB_STACK_N;
123 while (++markscan <= PL_markstack + mark_max)
128 PerlIO_printf(Perl_debug_log, "... ");
130 if (stack_base[0] != &PL_sv_undef || stack_max < 0)
131 PerlIO_printf(Perl_debug_log, " [STACK UNDERFLOW!!!]\n");
134 if (markscan <= PL_markstack + mark_max && *markscan < i) {
137 PerlIO_putc(Perl_debug_log, '*');
139 while (markscan <= PL_markstack + mark_max && *markscan < i);
140 PerlIO_printf(Perl_debug_log, " ");
144 PerlIO_printf(Perl_debug_log, "%-4s ", SvPEEK(stack_base[i]));
147 PerlIO_printf(Perl_debug_log, "\n");
150 PERL_UNUSED_ARG(stack_base);
151 PERL_UNUSED_ARG(stack_min);
152 PERL_UNUSED_ARG(stack_max);
153 PERL_UNUSED_ARG(mark_min);
154 PERL_UNUSED_ARG(mark_max);
155 #endif /* DEBUGGING */
159 /* dump the current stack */
164 #ifndef SKIP_DEBUGGING
166 if (CopSTASH_eq(PL_curcop, PL_debstash) && !DEBUG_J_TEST_)
169 PerlIO_printf(Perl_debug_log, " => ");
170 deb_stack_n(PL_stack_base,
172 PL_stack_sp - PL_stack_base,
173 PL_curstackinfo->si_markoff,
174 PL_markstack_ptr - PL_markstack);
177 #endif /* SKIP_DEBUGGING */
183 static const char * const si_names[] = {
198 /* display all stacks */
202 Perl_deb_stack_all(pTHX)
209 /* rewind to start of chain */
210 si = PL_curstackinfo;
217 const size_t si_name_ix = si->si_type+1; /* -1 is a valid index */
218 const char * const si_name = (si_name_ix >= sizeof(si_names)) ? "????" : si_names[si_name_ix];
220 PerlIO_printf(Perl_debug_log, "STACK %"IVdf": %s\n",
223 for (ix=0; ix<=si->si_cxix; ix++) {
225 const PERL_CONTEXT * const cx = &(si->si_cxstack[ix]);
226 PerlIO_printf(Perl_debug_log,
227 " CX %"IVdf": %-6s => ",
228 (IV)ix, PL_block_type[CxTYPE(cx)]
230 /* substitution contexts don't save stack pointers etc) */
231 if (CxTYPE(cx) == CXt_SUBST)
232 PerlIO_printf(Perl_debug_log, "\n");
235 /* Find the the current context's stack range by searching
236 * forward for any higher contexts using this stack; failing
237 * that, it will be equal to the size of the stack for old
238 * stacks, or PL_stack_sp for the current stack
241 I32 i, stack_min, stack_max, mark_min, mark_max;
242 const PERL_CONTEXT *cx_n = NULL;
245 /* there's a separate stack per SI, so only search
248 for (i=ix+1; i<=si->si_cxix; i++) {
249 if (CxTYPE(cx) == CXt_SUBST)
251 cx_n = &(si->si_cxstack[i]);
255 stack_min = cx->blk_oldsp;
258 stack_max = cx_n->blk_oldsp;
260 else if (si == PL_curstackinfo) {
261 stack_max = PL_stack_sp - AvARRAY(si->si_stack);
264 stack_max = AvFILLp(si->si_stack);
267 /* for the other stack types, there's only one stack
268 * shared between all SIs */
275 if (i > si_n->si_cxix) {
276 if (si_n == PL_curstackinfo)
279 si_n = si_n->si_next;
283 if (CxTYPE(&(si_n->si_cxstack[i])) == CXt_SUBST)
285 cx_n = &(si_n->si_cxstack[i]);
289 mark_min = cx->blk_oldmarksp;
291 mark_max = cx_n->blk_oldmarksp;
294 mark_max = PL_markstack_ptr - PL_markstack;
297 deb_stack_n(AvARRAY(si->si_stack),
298 stack_min, stack_max, mark_min, mark_max);
300 if (CxTYPE(cx) == CXt_EVAL || CxTYPE(cx) == CXt_SUB
301 || CxTYPE(cx) == CXt_FORMAT)
303 const OP * const retop = cx->blk_sub.retop;
305 PerlIO_printf(Perl_debug_log, " retop=%s\n",
306 retop ? OP_NAME(retop) : "(null)"
313 if (si == PL_curstackinfo)
318 break; /* shouldn't happen, but just in case.. */
319 } /* next stackinfo */
321 PerlIO_printf(Perl_debug_log, "\n");
324 #endif /* DEBUGGING */
329 * c-indentation-style: bsd
331 * indent-tabs-mode: t
334 * ex: set ts=8 sts=4 sw=4 noet: