tests/torture.at

   1 # Torturing Bison.                                    -*- Autotest -*-
   2
   3 # Copyright (C) 2001-2002, 2004-2007, 2009-2012 Free Software
   4 # Foundation, Inc.
   5
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 AT_BANNER([[Torture Tests.]])
  20
  21
  22 # AT_INCREASE_DATA_SIZE(SIZE)
  23 # ---------------------------
  24 # Try to increase the data size to SIZE KiB if possible.
  25 m4_define([AT_INCREASE_DATA_SIZE],
  26 [data_limit=`(ulimit -S -d) 2>/dev/null`
  27 case $data_limit in
  28 [[0-9]]*)
  29   if test "$data_limit" -lt $1; then
  30     AT_CHECK([ulimit -S -d $1 || exit 77])
  31     ulimit -S -d $1
  32   fi
  33 esac])
  34
  35
  36 ## ------------------------------------- ##
  37 ## Creating a large artificial grammar.  ##
  38 ## ------------------------------------- ##
  39
  40 # AT_DATA_TRIANGULAR_GRAMMAR(FILE-NAME, SIZE)
  41 # -------------------------------------------
  42 # Create FILE-NAME, containing a self checking parser for a huge
  43 # triangular grammar.
  44 m4_define([AT_DATA_TRIANGULAR_GRAMMAR],
  45 [AT_BISON_OPTION_PUSHDEFS
  46 AT_DATA([[gengram.pl]],
  47 [[#! /usr/bin/perl -w
  48
  49 use strict;
  50 my $max = $ARGV[0] || 10;
  51
  52 print <<EOF;
  53 ]AT_DATA_GRAMMAR_PROLOGUE[
  54 %error-verbose
  55 %debug
  56 %{
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <assert.h>
  60 #define MAX $max
  61 ]AT_YYLEX_DECLARE[
  62 ]AT_YYERROR_DECLARE[
  63 %}
  64 %union
  65 {
  66   int val;
  67 };
  68
  69 %token END "end"
  70 %type <val> exp input
  71 EOF
  72
  73 for my $size (1 .. $max)
  74   {
  75     print "%token t$size $size \"$size\"\n";
  76   };
  77
  78 print <<EOF;
  79 %%
  80 input:
  81   exp        { assert (\@S|@1 == 0); \$\$ = \@S|@1; }
  82 | input exp  { assert (\@S|@2 == \@S|@1 + 1); \$\$ = \@S|@2; }
  83 ;
  84
  85 exp:
  86   END
  87     { \$\$ = 0; }
  88 EOF
  89
  90 for my $size (1 .. $max)
  91   {
  92     use Text::Wrap;
  93     print wrap ("| ", "   ",
  94                 (map { "\"$_\"" } (1 .. $size)),
  95                 " END \n"),
  96                   "    { \$\$ = $size; }\n";
  97   };
  98 print ";\n";
  99
 100 print <<\EOF;
 101 %%
 102 ]AT_YYERROR_DEFINE[
 103 static int
 104 yylex (void)
 105 {
 106   static int inner = 1;
 107   static int outer = 0;
 108   if (outer > MAX)
 109     return 0;
 110   else if (inner > outer)
 111     {
 112       inner = 1;
 113       ++outer;
 114       return END;
 115     }
 116   return inner++;
 117 }
 118 int
 119 main (void)
 120 {
 121   yydebug = !!getenv ("YYDEBUG");
 122   return yyparse ();
 123 }
 124 EOF
 125 ]])
 126 AT_BISON_OPTION_POPDEFS
 127
 128 AT_CHECK([$PERL -w ./gengram.pl $2 || exit 77], 0, [stdout])
 129 mv stdout $1
 130 ])
 131
 132
 133 ## -------------- ##
 134 ## Big triangle.  ##
 135 ## -------------- ##
 136
 137 AT_SETUP([Big triangle])
 138
 139 # I have been able to go up to 2000 on my machine.
 140 # I tried 3000, a 29Mb grammar file, but then my system killed bison.
 141 # With 500 and the new parser, which consume far too much memory,
 142 # it gets killed too.  Of course the parser is to be cleaned.
 143 AT_DATA_TRIANGULAR_GRAMMAR([input.y], [200])
 144 AT_BISON_CHECK_NO_XML([-v -o input.c input.y])
 145 AT_COMPILE([input])
 146 AT_PARSER_CHECK([./input])
 147
 148 AT_CLEANUP
 149
 150
 151
 152 # AT_DATA_HORIZONTAL_GRAMMAR(FILE-NAME, SIZE)
 153 # -------------------------------------------
 154 # Create FILE-NAME, containing a self checking parser for a huge
 155 # horizontal grammar.
 156 m4_define([AT_DATA_HORIZONTAL_GRAMMAR],
 157 [AT_BISON_OPTION_PUSHDEFS
 158 AT_DATA([[gengram.pl]],
 159 [[#! /usr/bin/perl -w
 160
 161 use strict;
 162 my $max = $ARGV[0] || 10;
 163
 164 print <<EOF;
 165 ]AT_DATA_GRAMMAR_PROLOGUE[
 166 %error-verbose
 167 %debug
 168 %{
 169 #include <stdio.h>
 170 #include <stdlib.h>
 171 #define MAX $max
 172 ]AT_YYLEX_DECLARE[
 173 ]AT_YYERROR_DECLARE[
 174 %}
 175
 176 %token
 177 EOF
 178 for my $size (1 .. $max)
 179   {
 180     print "    t$size $size \"$size\"\n";
 181   };
 182
 183 print <<EOF;
 184
 185 %%
 186 EOF
 187
 188 use Text::Wrap;
 189 print
 190   wrap ("exp: ", "  ",
 191         (map { "\"$_\"" } (1 .. $max)), ";"),
 192   "\n";
 193
 194 print <<\EOF;
 195 %%
 196 #include <assert.h>
 197 ]AT_YYERROR_DEFINE[
 198 static int
 199 yylex (void)
 200 {
 201   static int counter = 1;
 202   if (counter <= MAX)
 203     return counter++;
 204   assert (counter++ == MAX + 1);
 205   return 0;
 206 }
 207
 208 int
 209 main (void)
 210 {
 211   yydebug = !!getenv ("YYDEBUG");
 212   return yyparse ();
 213 }
 214 EOF
 215 ]])
 216
 217 AT_CHECK([$PERL -w ./gengram.pl $2 || exit 77], 0, [stdout])
 218 mv stdout $1
 219 AT_BISON_OPTION_POPDEFS
 220 ])
 221
 222
 223 ## ---------------- ##
 224 ## Big horizontal.  ##
 225 ## ---------------- ##
 226
 227 AT_SETUP([Big horizontal])
 228
 229 # I have been able to go up to 10000 on my machine, but I had to
 230 # increase the maximum stack size (* 100).  It gave:
 231 #
 232 # input.y      263k
 233 # input.tab.c  1.3M
 234 # input        453k
 235 #
 236 # gengram.pl 10000                 0.70s user 0.01s sys  99% cpu    0.711 total
 237 # bison input.y                  730.56s user 0.53s sys  99% cpu 12:12.34 total
 238 # gcc -Wall input.tab.c -o input   5.81s user 0.20s sys 100% cpu     6.01 total
 239 # ./input                          0.00s user 0.01s sys 108% cpu     0.01 total
 240 #
 241 AT_DATA_HORIZONTAL_GRAMMAR([input.y], [1000])
 242
 243 # GNU m4 requires about 70 MiB for this test on a 32-bit host.
 244 # Ask for 200 MiB, which should be plenty even on a 64-bit host.
 245 AT_INCREASE_DATA_SIZE(204000)
 246
 247 AT_BISON_CHECK_NO_XML([-v -o input.c input.y])
 248 AT_COMPILE([input])
 249 AT_PARSER_CHECK([./input])
 250
 251 AT_CLEANUP
 252
 253
 254
 255 # AT_DATA_LOOKAHEAD_TOKENS_GRAMMAR(FILE-NAME, SIZE)
 256 # --------------------------------------------------
 257 # Create FILE-NAME, containing a self checking parser for a grammar
 258 # requiring SIZE lookahead tokens.
 259 m4_define([AT_DATA_LOOKAHEAD_TOKENS_GRAMMAR],
 260 [AT_BISON_OPTION_PUSHDEFS
 261 AT_DATA([[gengram.pl]],
 262 [[#! /usr/bin/perl -w
 263
 264 use strict;
 265 use Text::Wrap;
 266 my $max = $ARGV[0] || 10;
 267
 268 print <<EOF;
 269 %error-verbose
 270 %debug
 271 %{
 272 # include <stdio.h>
 273 # include <stdlib.h>
 274 # include <assert.h>
 275 # define MAX $max
 276 ]AT_YYLEX_DECLARE[
 277 ]AT_YYERROR_DECLARE[
 278 %}
 279 %union
 280 {
 281   int val;
 282 };
 283
 284 %type <val> input exp
 285 %token token
 286 EOF
 287
 288 print
 289   wrap ("%type <val> ",
 290         "            ",
 291         map { "n$_" } (1 .. $max)),
 292   "\n";
 293
 294 print "%token\n";
 295 for my $count (1 .. $max)
 296   {
 297     print "    t$count $count \"$count\"\n";
 298   };
 299
 300 print <<EOF;
 301 %%
 302 input:
 303   exp        { assert (\@S|@1 == 1); \$\$ = \@S|@1; }
 304 | input exp  { assert (\@S|@2 == \@S|@1 + 1); \$\$ = \@S|@2; }
 305 ;
 306
 307 exp:
 308   n1 "1" { assert (\@S|@1 == 1); \@S|@\@S|@ = \@S|@1; }
 309 EOF
 310
 311 for my $count (2 .. $max)
 312   {
 313     print "| n$count \"$count\" { assert (\@S|@1 == $count); \@S|@\@S|@ = \@S|@1; }\n";
 314   };
 315 print ";\n";
 316
 317 for my $count (1 .. $max)
 318   {
 319     print "n$count: token { \$\$ = $count; };\n";
 320   };
 321
 322 print <<\EOF;
 323 %%
 324 ]AT_YYERROR_DEFINE[
 325 static int
 326 yylex (void)
 327 {
 328   static int return_token = 1;
 329   static int counter = 1;
 330   if (counter > MAX)
 331     {
 332       assert (counter++ == MAX + 1);
 333       return 0;
 334     }
 335   if (return_token)
 336     {
 337       return_token = 0;
 338       return token;
 339     }
 340   return_token = 1;
 341   return counter++;
 342 }
 343
 344 int
 345 main (void)
 346 {
 347   yydebug = !!getenv ("YYDEBUG");
 348   return yyparse ();
 349 }
 350 EOF
 351 ]])
 352
 353 AT_CHECK([$PERL -w ./gengram.pl $2 || exit 77], 0, [stdout])
 354 mv stdout $1
 355 AT_BISON_OPTION_POPDEFS
 356 ])
 357
 358
 359 ## ------------------------ ##
 360 ## Many lookahead tokens.   ##
 361 ## ------------------------ ##
 362
 363 AT_SETUP([Many lookahead tokens])
 364
 365 AT_DATA_LOOKAHEAD_TOKENS_GRAMMAR([input.y], [1000])
 366
 367 # GNU m4 requires about 70 MiB for this test on a 32-bit host.
 368 # Ask for 200 MiB, which should be plenty even on a 64-bit host.
 369 AT_INCREASE_DATA_SIZE(204000)
 370
 371 AT_BISON_CHECK([-v -o input.c input.y])
 372 AT_COMPILE([input])
 373 AT_PARSER_CHECK([./input])
 374
 375 AT_CLEANUP
 376
 377
 378
 379 # AT_DATA_STACK_TORTURE(C-PROLOGUE, [BISON-DECLS])
 380 # ------------------------------------------------
 381 # A parser specialized in torturing the stack size.
 382 m4_define([AT_DATA_STACK_TORTURE],
 383 [AT_BISON_OPTION_PUSHDEFS([$2])
 384 # A grammar of parens growing the stack thanks to right recursion.
 385 # exp:
 386 AT_DATA([input.y],
 387 [[%{
 388 #include <errno.h>
 389 #include <limits.h>
 390 #include <stdio.h>
 391 #include <stdlib.h>
 392 ]$1[
 393   ]AT_YYLEX_DECLARE[
 394   ]AT_YYERROR_DECLARE[
 395 %}
 396 ]$2[
 397 %error-verbose
 398 %debug
 399 %token WAIT_FOR_EOF
 400 %%
 401 exp: WAIT_FOR_EOF exp | ;
 402 %%
 403 ]AT_YYERROR_DEFINE[
 404 #include <assert.h>
 405 static int
 406 yylex (void)
 407 {
 408   assert (0 <= yylval);
 409   if (yylval--)
 410     return WAIT_FOR_EOF;
 411   else
 412     return EOF;
 413 }
 414
 415 /* Return argv[1] as an int. */
 416 static int
 417 get_args (int argc, const char **argv)
 418 {
 419   int res;
 420   char *endp;
 421   assert (argc == 2);
 422   res = strtol (argv[1], &endp, 10);
 423   assert (argv[1] != endp);
 424   assert (0 <= res);
 425   assert (res <= INT_MAX);
 426   assert (errno != ERANGE);
 427   return res;
 428 }
 429
 430 int
 431 main (int argc, const char **argv)
 432 {
 433   YYSTYPE yylval_init = get_args (argc, argv);
 434   int status;
 435   int count;
 436 ]m4_bmatch([$2], [api.push-pull both],
 437 [[  yypstate *ps = yypstate_new ();
 438 ]])[  yydebug = 1;
 439   for (count = 0; count < 2; ++count)
 440     {
 441       int new_status;
 442       yylval = yylval_init;
 443       new_status = ]m4_bmatch([$2], [api.push-pull both],
 444                               [[yypull_parse (ps)]],
 445                               [[yyparse ()]])[;
 446       if (count == 0)
 447         status = new_status;
 448       else
 449         assert (new_status == status);
 450     }]m4_bmatch([$2], [api.push-pull both],[[
 451   yypstate_delete (ps);]])[
 452   return status;
 453 }
 454 ]])
 455 AT_BISON_OPTION_POPDEFS([$2])
 456 AT_BISON_CHECK([-o input.c input.y])
 457 AT_COMPILE([input])
 458 ])
 459
 460
 461 ## -------------------------------------- ##
 462 ## Exploding the Stack Size with Alloca.  ##
 463 ## -------------------------------------- ##
 464
 465 AT_SETUP([Exploding the Stack Size with Alloca])
 466
 467 m4_pushdef([AT_USE_ALLOCA], [[
 468 #if (defined __GNUC__ || defined __BUILTIN_VA_ARG_INCR \
 469      || defined _AIX || defined _MSC_VER || defined _ALLOCA_H)
 470 # define YYSTACK_USE_ALLOCA 1
 471 #endif
 472 ]])
 473
 474 AT_DATA_STACK_TORTURE([AT_USE_ALLOCA])
 475
 476 # Below the limit of 200.
 477 AT_PARSER_CHECK([./input 20], 0, [], [ignore],
 478                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 479 # Two enlargements: 2 * 2 * 200.
 480 AT_PARSER_CHECK([./input 900], 0, [], [ignore],
 481                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 482 # Fails: beyond the limit of 10,000 (which we don't reach anyway since we
 483 # multiply by two starting at 200 => 5120 is the last possible).
 484 AT_PARSER_CHECK([./input 10000], 2, [], [ignore],
 485                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 486
 487 # The push parser can't use alloca since the stacks can't be locals.  This test
 488 # just helps guarantee we don't let the YYSTACK_USE_ALLOCA feature affect
 489 # push parsers.
 490 AT_DATA_STACK_TORTURE([AT_USE_ALLOCA],
 491 [[%define api.push-pull both
 492 ]])
 493 AT_PARSER_CHECK([./input 20], 0, [], [ignore],
 494                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 495 AT_PARSER_CHECK([./input 900], 0, [], [ignore],
 496                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 497 AT_PARSER_CHECK([./input 10000], 2, [], [ignore],
 498                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 499
 500 m4_popdef([AT_USE_ALLOCA])
 501
 502 AT_CLEANUP
 503
 504
 505
 506
 507 ## -------------------------------------- ##
 508 ## Exploding the Stack Size with Malloc.  ##
 509 ## -------------------------------------- ##
 510
 511 AT_SETUP([Exploding the Stack Size with Malloc])
 512
 513 m4_pushdef([AT_USE_ALLOCA], [[#define YYSTACK_USE_ALLOCA 0]])
 514
 515 AT_DATA_STACK_TORTURE([AT_USE_ALLOCA])
 516
 517 # Below the limit of 200.
 518 AT_PARSER_CHECK([./input 20], 0, [], [ignore],
 519                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 520 # Two enlargements: 2 * 2 * 200.
 521 AT_PARSER_CHECK([./input 900], 0, [], [ignore],
 522                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 523 # Fails: beyond the limit of 10,000 (which we don't reach anyway since we
 524 # multiply by two starting at 200 => 5120 is the possible).
 525 AT_PARSER_CHECK([./input 10000], 2, [], [ignore],
 526                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 527
 528 AT_DATA_STACK_TORTURE([AT_USE_ALLOCA],
 529 [[%define api.push-pull both
 530 ]])
 531 AT_PARSER_CHECK([./input 20], 0, [], [ignore],
 532                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 533 AT_PARSER_CHECK([./input 900], 0, [], [ignore],
 534                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 535 AT_PARSER_CHECK([./input 10000], 2, [], [ignore],
 536                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 537
 538 m4_popdef([AT_USE_ALLOCA])
 539
 540 AT_CLEANUP