tests/torture.at

   1 # Torturing Bison.                                    -*- Autotest -*-
   2 # Copyright (C) 2001, 2002, 2004, 2005, 2006, 2007, 2009 Free Software
   3 # Foundation, Inc.
   4
   5 # This program is free software: you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation, either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 AT_BANNER([[Torture Tests.]])
  19
  20
  21 # AT_INCREASE_DATA_SIZE(SIZE)
  22 # ---------------------------
  23 # Try to increase the data size to SIZE KiB if possible.
  24 m4_define([AT_INCREASE_DATA_SIZE],
  25 [data_limit=`(ulimit -S -d) 2>/dev/null`
  26 case $data_limit in
  27 [[0-9]]*)
  28   if test "$data_limit" -lt $1; then
  29     AT_CHECK([ulimit -S -d $1 || exit 77])
  30     ulimit -S -d $1
  31   fi
  32 esac])
  33
  34
  35 ## ------------------------------------- ##
  36 ## Creating a large artificial grammar.  ##
  37 ## ------------------------------------- ##
  38
  39 # AT_DATA_TRIANGULAR_GRAMMAR(FILE-NAME, SIZE)
  40 # -------------------------------------------
  41 # Create FILE-NAME, containing a self checking parser for a huge
  42 # triangular grammar.
  43 m4_define([AT_DATA_TRIANGULAR_GRAMMAR],
  44 [AT_DATA([[gengram.pl]],
  45 [[#! /usr/bin/perl -w
  46
  47 use strict;
  48 my $max = $ARGV[0] || 10;
  49
  50 print <<EOF;
  51 ]AT_DATA_GRAMMAR_PROLOGUE[
  52 %error-verbose
  53 %debug
  54 %{
  55 #include <stdio.h>
  56 #include <stdlib.h>
  57
  58 static int yylex (void);
  59 static void yyerror (const char *msg);
  60 %}
  61 %union
  62 {
  63   int val;
  64 };
  65
  66 %token END "end"
  67 %type <val> exp input
  68 EOF
  69
  70 for my $size (1 .. $max)
  71   {
  72     print "%token t$size $size \"$size\"\n";
  73   };
  74
  75 print <<EOF;
  76 %%
  77 input:
  78   exp        { if (\@S|@1 != 0) abort (); \$\$ = \@S|@1; }
  79 | input exp  { if (\@S|@2 != \@S|@1 + 1) abort (); \$\$ = \@S|@2; }
  80 ;
  81
  82 exp:
  83   END
  84     { \$\$ = 0; }
  85 EOF
  86
  87 for my $size (1 .. $max)
  88   {
  89     use Text::Wrap;
  90     print wrap ("| ", "   ",
  91                 (map { "\"$_\"" } (1 .. $size)),
  92                 " END \n"),
  93                   "    { \$\$ = $size; }\n";
  94   };
  95 print ";\n";
  96
  97 print <<EOF;
  98 %%
  99 static int
 100 yylex (void)
 101 {
 102   static int inner = 1;
 103   static int outer = 0;
 104   if (outer > $max)
 105     return 0;
 106   else if (inner > outer)
 107     {
 108       inner = 1;
 109       ++outer;
 110       return END;
 111     }
 112   return inner++;
 113 }
 114
 115 static void
 116 yyerror (const char *msg)
 117 {
 118   fprintf (stderr, "%s\\n", msg);
 119 }
 120
 121 int
 122 main (void)
 123 {
 124   yydebug = !!getenv ("YYDEBUG");
 125   return yyparse ();
 126 }
 127 EOF
 128 ]])
 129
 130 AT_CHECK([perl -w ./gengram.pl $2 || exit 77], 0, [stdout])
 131 mv stdout $1
 132 ])
 133
 134
 135 ## -------------- ##
 136 ## Big triangle.  ##
 137 ## -------------- ##
 138
 139 AT_SETUP([Big triangle])
 140
 141 # I have been able to go up to 2000 on my machine.
 142 # I tried 3000, a 29Mb grammar file, but then my system killed bison.
 143 # With 500 and the new parser, which consume far too much memory,
 144 # it gets killed too.  Of course the parser is to be cleaned.
 145 AT_DATA_TRIANGULAR_GRAMMAR([input.y], [200])
 146 AT_BISON_CHECK_NO_XML([-v -o input.c input.y])
 147 AT_COMPILE([input])
 148 AT_PARSER_CHECK([./input])
 149
 150 AT_CLEANUP
 151
 152
 153
 154 # AT_DATA_HORIZONTAL_GRAMMAR(FILE-NAME, SIZE)
 155 # -------------------------------------------
 156 # Create FILE-NAME, containing a self checking parser for a huge
 157 # horizontal grammar.
 158 m4_define([AT_DATA_HORIZONTAL_GRAMMAR],
 159 [AT_DATA([[gengram.pl]],
 160 [[#! /usr/bin/perl -w
 161
 162 use strict;
 163 my $max = $ARGV[0] || 10;
 164
 165 print <<EOF;
 166 ]AT_DATA_GRAMMAR_PROLOGUE[
 167 %error-verbose
 168 %debug
 169 %{
 170 #include <stdio.h>
 171 #include <stdlib.h>
 172
 173 static int yylex (void);
 174 static void yyerror (const char *msg);
 175 %}
 176
 177 %token
 178 EOF
 179 for my $size (1 .. $max)
 180   {
 181     print "    t$size $size \"$size\"\n";
 182   };
 183
 184 print <<EOF;
 185
 186 %%
 187 EOF
 188
 189 use Text::Wrap;
 190 print
 191   wrap ("exp: ", "  ",
 192         (map { "\"$_\"" } (1 .. $max)), ";"),
 193   "\n";
 194
 195 print <<EOF;
 196 %%
 197 static int
 198 yylex (void)
 199 {
 200   static int counter = 1;
 201   if (counter <= $max)
 202     return counter++;
 203   if (counter++ != $max + 1)
 204     abort ();
 205   return 0;
 206 }
 207
 208 static void
 209 yyerror (const char *msg)
 210 {
 211   fprintf (stderr, "%s\\n", msg);
 212 }
 213
 214 int
 215 main (void)
 216 {
 217   yydebug = !!getenv ("YYDEBUG");
 218   return yyparse ();
 219 }
 220 EOF
 221 ]])
 222
 223 AT_CHECK([perl -w ./gengram.pl $2 || exit 77], 0, [stdout])
 224 mv stdout $1
 225 ])
 226
 227
 228 ## ---------------- ##
 229 ## Big horizontal.  ##
 230 ## ---------------- ##
 231
 232 AT_SETUP([Big horizontal])
 233
 234 # I have been able to go up to 10000 on my machine, but I had to
 235 # increase the maximum stack size (* 100).  It gave:
 236 #
 237 # input.y      263k
 238 # input.tab.c  1.3M
 239 # input        453k
 240 #
 241 # gengram.pl 10000                 0.70s user 0.01s sys  99% cpu    0.711 total
 242 # bison input.y                  730.56s user 0.53s sys  99% cpu 12:12.34 total
 243 # gcc -Wall input.tab.c -o input   5.81s user 0.20s sys 100% cpu     6.01 total
 244 # ./input                          0.00s user 0.01s sys 108% cpu     0.01 total
 245 #
 246 AT_DATA_HORIZONTAL_GRAMMAR([input.y], [1000])
 247
 248 # GNU m4 requires about 70 MiB for this test on a 32-bit host.
 249 # Ask for 200 MiB, which should be plenty even on a 64-bit host.
 250 AT_INCREASE_DATA_SIZE(204000)
 251
 252 AT_BISON_CHECK_NO_XML([-v -o input.c input.y])
 253 AT_COMPILE([input])
 254 AT_PARSER_CHECK([./input])
 255
 256 AT_CLEANUP
 257
 258
 259
 260 # AT_DATA_LOOKAHEAD_TOKENS_GRAMMAR(FILE-NAME, SIZE)
 261 # --------------------------------------------------
 262 # Create FILE-NAME, containing a self checking parser for a grammar
 263 # requiring SIZE lookahead tokens.
 264 m4_define([AT_DATA_LOOKAHEAD_TOKENS_GRAMMAR],
 265 [AT_DATA([[gengram.pl]],
 266 [[#! /usr/bin/perl -w
 267
 268 use strict;
 269 use Text::Wrap;
 270 my $max = $ARGV[0] || 10;
 271
 272 print <<EOF;
 273 %error-verbose
 274 %debug
 275 %{
 276 # include <stdio.h>
 277 # include <stdlib.h>
 278 # include <assert.h>
 279
 280 static int yylex (void);
 281 static void yyerror (const char *msg);
 282 %}
 283 %union
 284 {
 285   int val;
 286 };
 287
 288 %type <val> input exp
 289 %token token
 290 EOF
 291
 292 print
 293   wrap ("%type <val> ",
 294         "            ",
 295         map { "n$_" } (1 .. $max)),
 296   "\n";
 297
 298 print "%token\n";
 299 for my $count (1 .. $max)
 300   {
 301     print "    t$count $count \"$count\"\n";
 302   };
 303
 304 print <<EOF;
 305 %%
 306 input:
 307   exp        { assert (\@S|@1 == 1); \$\$ = \@S|@1; }
 308 | input exp  { assert (\@S|@2 == \@S|@1 + 1); \$\$ = \@S|@2; }
 309 ;
 310
 311 exp:
 312   n1 "1" { assert (\@S|@1 == 1); \@S|@\@S|@ = \@S|@1; }
 313 EOF
 314
 315 for my $count (2 .. $max)
 316   {
 317     print "| n$count \"$count\" { assert (\@S|@1 == $count); \@S|@\@S|@ = \@S|@1; }\n";
 318   };
 319 print ";\n";
 320
 321 for my $count (1 .. $max)
 322   {
 323     print "n$count: token { \$\$ = $count; };\n";
 324   };
 325
 326 print <<EOF;
 327 %%
 328 static int
 329 yylex (void)
 330 {
 331   static int return_token = 1;
 332   static int counter = 1;
 333   if (counter > $max)
 334     {
 335       if (counter++ != $max + 1)
 336         abort ();
 337       return 0;
 338     }
 339   if (return_token)
 340     {
 341       return_token = 0;
 342       return token;
 343     }
 344   return_token = 1;
 345   return counter++;
 346 }
 347
 348 static void
 349 yyerror (const char *msg)
 350 {
 351   fprintf (stderr, "%s\\n", msg);
 352 }
 353
 354 int
 355 main (void)
 356 {
 357   yydebug = !!getenv ("YYDEBUG");
 358   return yyparse ();
 359 }
 360 EOF
 361 ]])
 362
 363 AT_CHECK([perl -w ./gengram.pl $2 || exit 77], 0, [stdout])
 364 mv stdout $1
 365 ])
 366
 367
 368 ## ------------------------ ##
 369 ## Many lookahead tokens.   ##
 370 ## ------------------------ ##
 371
 372 AT_SETUP([Many lookahead tokens])
 373
 374 AT_DATA_LOOKAHEAD_TOKENS_GRAMMAR([input.y], [1000])
 375
 376 # GNU m4 requires about 70 MiB for this test on a 32-bit host.
 377 # Ask for 200 MiB, which should be plenty even on a 64-bit host.
 378 AT_INCREASE_DATA_SIZE(204000)
 379
 380 AT_BISON_CHECK([-v -o input.c input.y])
 381 AT_COMPILE([input])
 382 AT_PARSER_CHECK([./input])
 383
 384 AT_CLEANUP
 385
 386
 387
 388 # AT_DATA_STACK_TORTURE(C-PROLOGUE, [BISON-DECLS])
 389 # ------------------------------------------------
 390 # A parser specialized in torturing the stack size.
 391 m4_define([AT_DATA_STACK_TORTURE],
 392 [# A grammar of parens growing the stack thanks to right recursion.
 393 # exp:
 394 AT_DATA([input.y],
 395 [[%{
 396 #include <errno.h>
 397 #include <limits.h>
 398 #include <stdio.h>
 399 #include <stdlib.h>
 400 ]$1[
 401   static int yylex (void);
 402   static void yyerror (const char *msg);
 403 %}
 404 ]$2[
 405 %error-verbose
 406 %debug
 407 %token WAIT_FOR_EOF
 408 %%
 409 exp: WAIT_FOR_EOF exp | ;
 410 %%
 411 static void
 412 yyerror (const char *msg)
 413 {
 414   fprintf (stderr, "%s\n", msg);
 415 }
 416
 417 static int
 418 yylex (void)
 419 {
 420   if (yylval < 0)
 421     abort ();
 422   if (yylval--)
 423     return WAIT_FOR_EOF;
 424   else
 425     return EOF;
 426 }
 427
 428 int
 429 main (int argc, const char **argv)
 430 {
 431   char *endp;
 432   YYSTYPE yylval_init;
 433   if (argc != 2)
 434     abort ();
 435   yylval_init = strtol (argv[1], &endp, 10);
 436   if (! (argv[1] != endp
 437          && 0 <= yylval_init && yylval_init <= INT_MAX
 438          && errno != ERANGE))
 439     abort ();
 440   yydebug = 1;
 441   {
 442     int count;
 443     int status;
 444 ]m4_bmatch([$2], [%push-],
 445 [[    yypstate *ps = yypstate_new ();
 446 ]])[    for (count = 0; count < 2; ++count)
 447       {
 448         int new_status;
 449         yylval = yylval_init;
 450 ]m4_bmatch([$2], [%push-],
 451 [[        new_status = yypull_parse (ps);
 452 ]],
 453 [[        new_status = yyparse ();
 454 ]])[        if (count > 0 && new_status != status)
 455           abort ();
 456         status = new_status;
 457       }
 458 ]m4_bmatch([$2], [%push-],
 459 [[    yypstate_delete (ps);
 460 ]])[    return status;
 461   }
 462 }
 463 ]])
 464 AT_BISON_CHECK([-o input.c input.y])
 465 AT_COMPILE([input])
 466 ])
 467
 468
 469 ## -------------------------------------- ##
 470 ## Exploding the Stack Size with Alloca.  ##
 471 ## -------------------------------------- ##
 472
 473 AT_SETUP([Exploding the Stack Size with Alloca])
 474
 475 m4_pushdef([AT_USE_ALLOCA], [[
 476 #if (defined __GNUC__ || defined __BUILTIN_VA_ARG_INCR \
 477      || defined _AIX || defined _MSC_VER || defined _ALLOCA_H)
 478 # define YYSTACK_USE_ALLOCA 1
 479 #endif
 480 ]])
 481
 482 AT_DATA_STACK_TORTURE([AT_USE_ALLOCA])
 483
 484 # Below the limit of 200.
 485 AT_PARSER_CHECK([./input 20], 0, [], [ignore],
 486                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 487 # Two enlargements: 2 * 2 * 200.
 488 AT_PARSER_CHECK([./input 900], 0, [], [ignore],
 489                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 490 # Fails: beyond the limit of 10,000 (which we don't reach anyway since we
 491 # multiply by two starting at 200 => 5120 is the last possible).
 492 AT_PARSER_CHECK([./input 10000], 2, [], [ignore],
 493                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 494
 495 # The push parser can't use alloca since the stacks can't be locals.  This test
 496 # just helps guarantee we don't let the YYSTACK_USE_ALLOCA feature affect
 497 # push parsers.
 498 AT_DATA_STACK_TORTURE([AT_USE_ALLOCA],
 499 [[%define api.push-pull both
 500 ]])
 501 AT_PARSER_CHECK([./input 20], 0, [], [ignore],
 502                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 503 AT_PARSER_CHECK([./input 900], 0, [], [ignore],
 504                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 505 AT_PARSER_CHECK([./input 10000], 2, [], [ignore],
 506                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 507
 508 m4_popdef([AT_USE_ALLOCA])
 509
 510 AT_CLEANUP
 511
 512
 513
 514
 515 ## -------------------------------------- ##
 516 ## Exploding the Stack Size with Malloc.  ##
 517 ## -------------------------------------- ##
 518
 519 AT_SETUP([Exploding the Stack Size with Malloc])
 520
 521 m4_pushdef([AT_USE_ALLOCA], [[#define YYSTACK_USE_ALLOCA 0]])
 522
 523 AT_DATA_STACK_TORTURE([AT_USE_ALLOCA])
 524
 525 # Below the limit of 200.
 526 AT_PARSER_CHECK([./input 20], 0, [], [ignore],
 527                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 528 # Two enlargements: 2 * 2 * 200.
 529 AT_PARSER_CHECK([./input 900], 0, [], [ignore],
 530                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 531 # Fails: beyond the limit of 10,000 (which we don't reach anyway since we
 532 # multiply by two starting at 200 => 5120 is the possible).
 533 AT_PARSER_CHECK([./input 10000], 2, [], [ignore],
 534                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 535
 536 AT_DATA_STACK_TORTURE([AT_USE_ALLOCA],
 537 [[%define api.push-pull both
 538 ]])
 539 AT_PARSER_CHECK([./input 20], 0, [], [ignore],
 540                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 541 AT_PARSER_CHECK([./input 900], 0, [], [ignore],
 542                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 543 AT_PARSER_CHECK([./input 10000], 2, [], [ignore],
 544                 [[VALGRIND_OPTS="$VALGRIND_OPTS --log-fd=1"]])
 545
 546 m4_popdef([AT_USE_ALLOCA])
 547
 548 AT_CLEANUP