Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tag: v5.14.0-RC1
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 338 lines (289 sloc) 7.643 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337
/* deb.c
*
* 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, 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"
#define PERL_IN_DEB_C
#include "perl.h"

#if defined(PERL_IMPLICIT_CONTEXT)
void
Perl_deb_nocontext(const char *pat, ...)
{
#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, ...)
{
    va_list args;
    PERL_ARGS_ASSERT_DEB;
    va_start(args, pat);
#ifdef DEBUGGING
    vdeb(pat, &args);
#else
    PERL_UNUSED_CONTEXT;
#endif /* DEBUGGING */
    va_end(args);
}

void
Perl_vdeb(pTHX_ const char *pat, va_list *args)
{
#ifdef DEBUGGING
    dVAR;
    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 */
}

I32
Perl_debstackptrs(pTHX)
{
#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;
}


/* 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
    dVAR;
    register I32 i = stack_max - 30;
    const I32 *markscan = PL_markstack + mark_min;

    PERL_ARGS_ASSERT_DEB_STACK_N;

    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]));
    }
    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 size_t 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 = 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:
*/
Something went wrong with that request. Please try again.