tests/torture.at

   1 # Torturing Bison.                                    -*- Autotest -*-
   2 # Copyright (C) 2001, 2002, 2004, 2005 Free Software Foundation, Inc.
   3
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 2, or (at your option)
   7 # any later version.
   8
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17 # 02110-1301, USA.
  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_DATA([[gengram.pl]],
  46 [[#! /usr/bin/perl -w
  47
  48 use strict;
  49 my $max = $ARGV[0] || 10;
  50
  51 print <<EOF;
  52 ]AT_DATA_GRAMMAR_PROLOGUE[
  53 %error-verbose
  54 %debug
  55 %{
  56 #include <stdio.h>
  57 #include <stdlib.h>
  58
  59 static int yylex (void);
  60 static void yyerror (const char *msg);
  61 %}
  62 %union
  63 {
  64   int val;
  65 };
  66
  67 %token END "end"
  68 %type <val> exp input
  69 EOF
  70
  71 for my $size (1 .. $max)
  72   {
  73     print "%token t$size $size \"$size\"\n";
  74   };
  75
  76 print <<EOF;
  77 %%
  78 input:
  79   exp        { if (\@S|@1 != 0) abort (); \$\$ = \@S|@1; }
  80 | input exp  { if (\@S|@2 != \@S|@1 + 1) abort (); \$\$ = \@S|@2; }
  81 ;
  82
  83 exp:
  84   END
  85     { \$\$ = 0; }
  86 EOF
  87
  88 for my $size (1 .. $max)
  89   {
  90     use Text::Wrap;
  91     print wrap ("| ", "   ",
  92                 (map { "\"$_\"" } (1 .. $size)),
  93                 " END \n"),
  94                   "    { \$\$ = $size; }\n";
  95   };
  96 print ";\n";
  97
  98 print <<EOF;
  99 %%
 100 static int
 101 yylex (void)
 102 {
 103   static int inner = 1;
 104   static int outer = 0;
 105   if (outer > $max)
 106     return 0;
 107   else if (inner > outer)
 108     {
 109       inner = 1;
 110       ++outer;
 111       return END;
 112     }
 113   return inner++;
 114 }
 115
 116 static void
 117 yyerror (const char *msg)
 118 {
 119   fprintf (stderr, "%s\\n", msg);
 120 }
 121
 122 int
 123 main (void)
 124 {
 125   yydebug = !!getenv ("YYDEBUG");
 126   return yyparse ();
 127 }
 128 EOF
 129 ]])
 130
 131 AT_CHECK([perl -w ./gengram.pl $2 || exit 77], 0, [stdout])
 132 mv stdout $1
 133 ])
 134
 135
 136 ## -------------- ##
 137 ## Big triangle.  ##
 138 ## -------------- ##
 139
 140 AT_SETUP([Big triangle])
 141
 142 # I have been able to go up to 2000 on my machine.
 143 # I tried 3000, a 29Mb grammar file, but then my system killed bison.
 144 # With 500 and the new parser, which consume far too much memory,
 145 # it gets killed too.  Of course the parser is to be cleaned.
 146 AT_DATA_TRIANGULAR_GRAMMAR([input.y], [200])
 147 AT_CHECK([bison -v -o input.c input.y])
 148 AT_COMPILE([input])
 149 AT_PARSER_CHECK([./input])
 150
 151 AT_CLEANUP
 152
 153
 154
 155 # AT_DATA_HORIZONTAL_GRAMMAR(FILE-NAME, SIZE)
 156 # -------------------------------------------
 157 # Create FILE-NAME, containing a self checking parser for a huge
 158 # horizontal grammar.
 159 m4_define([AT_DATA_HORIZONTAL_GRAMMAR],
 160 [AT_DATA([[gengram.pl]],
 161 [[#! /usr/bin/perl -w
 162
 163 use strict;
 164 my $max = $ARGV[0] || 10;
 165
 166 print <<EOF;
 167 ]AT_DATA_GRAMMAR_PROLOGUE[
 168 %error-verbose
 169 %debug
 170 %{
 171 #include <stdio.h>
 172 #include <stdlib.h>
 173
 174 static int yylex (void);
 175 static void yyerror (const char *msg);
 176 %}
 177
 178 %token
 179 EOF
 180 for my $size (1 .. $max)
 181   {
 182     print "    t$size $size \"$size\"\n";
 183   };
 184
 185 print <<EOF;
 186
 187 %%
 188 EOF
 189
 190 use Text::Wrap;
 191 print
 192   wrap ("exp: ", "  ",
 193         (map { "\"$_\"" } (1 .. $max)), ";"),
 194   "\n";
 195
 196 print <<EOF;
 197 %%
 198 static int
 199 yylex (void)
 200 {
 201   static int counter = 1;
 202   if (counter > $max)
 203     return 0;
 204   else
 205   return counter++;
 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_CHECK([bison -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_LOOK_AHEAD_TOKENS_GRAMMAR(FILE-NAME, SIZE)
 261 # --------------------------------------------------
 262 # Create FILE-NAME, containing a self checking parser for a grammar
 263 # requiring SIZE look-ahead tokens.
 264 m4_define([AT_DATA_LOOK_AHEAD_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     return 0;
 335   if (return_token)
 336     {
 337       return_token = 0;
 338       return token;
 339     }
 340   return_token = 1;
 341   return counter++;
 342 }
 343
 344 static void
 345 yyerror (const char *msg)
 346 {
 347   fprintf (stderr, "%s\\n", msg);
 348 }
 349
 350 int
 351 main (void)
 352 {
 353   yydebug = !!getenv ("YYDEBUG");
 354   return yyparse ();
 355 }
 356 EOF
 357 ]])
 358
 359 AT_CHECK([perl -w ./gengram.pl $2 || exit 77], 0, [stdout])
 360 mv stdout $1
 361 ])
 362
 363
 364 ## ------------------------ ##
 365 ## Many look-ahead tokens.  ##
 366 ## ------------------------ ##
 367
 368 AT_SETUP([Many look-ahead tokens])
 369
 370 AT_DATA_LOOK_AHEAD_TOKENS_GRAMMAR([input.y], [1000])
 371
 372 # GNU m4 requires about 70 MiB for this test on a 32-bit host.
 373 # Ask for 200 MiB, which should be plenty even on a 64-bit host.
 374 AT_INCREASE_DATA_SIZE(204000)
 375
 376 AT_CHECK([bison -v -o input.c input.y])
 377 AT_COMPILE([input])
 378 AT_PARSER_CHECK([./input])
 379
 380 AT_CLEANUP
 381
 382
 383
 384 # AT_DATA_STACK_TORTURE(C-PROLOGUE)
 385 # ---------------------------------
 386 # A parser specialized in torturing the stack size.
 387 m4_define([AT_DATA_STACK_TORTURE],
 388 [# A grammar of parens growing the stack thanks to right recursion.
 389 # exp:
 390 AT_DATA([input.y],
 391 [[%{
 392 #include <errno.h>
 393 #include <limits.h>
 394 #include <stdio.h>
 395 #include <stdlib.h>
 396 ]$1[
 397   static int yylex (void);
 398   static void yyerror (const char *msg);
 399 %}
 400 %error-verbose
 401 %debug
 402 %token WAIT_FOR_EOF
 403 %%
 404 exp: WAIT_FOR_EOF exp | ;
 405 %%
 406 static void
 407 yyerror (const char *msg)
 408 {
 409   fprintf (stderr, "%s\n", msg);
 410 }
 411
 412 static int
 413 yylex (void)
 414 {
 415   if (yylval--)
 416     return WAIT_FOR_EOF;
 417   else
 418     return EOF;
 419 }
 420
 421 int
 422 main (int argc, const char **argv)
 423 {
 424   char *endp;
 425   if (argc != 2)
 426     abort ();
 427   yylval = strtol (argv[1], &endp, 10);
 428   if (! (argv[1] != endp
 429          && 0 <= yylval && yylval <= INT_MAX
 430          && errno != ERANGE))
 431     abort ();
 432   yydebug = 1;
 433   return yyparse ();
 434 }
 435 ]])
 436 AT_CHECK([bison -o input.c input.y])
 437 AT_COMPILE([input])
 438 ])
 439
 440
 441 ## -------------------------------------- ##
 442 ## Exploding the Stack Size with Alloca.  ##
 443 ## -------------------------------------- ##
 444
 445 AT_SETUP([Exploding the Stack Size with Alloca])
 446
 447 AT_DATA_STACK_TORTURE([[
 448 #if (defined __GNUC__ || defined __BUILTIN_VA_ARG_INCR \
 449      || defined _AIX || defined _MSC_VER || defined _ALLOCA_H)
 450 # define YYSTACK_USE_ALLOCA 1
 451 #endif
 452 ]])
 453
 454 # Below the limit of 200.
 455 AT_PARSER_CHECK([./input 20], 0, [], [ignore])
 456 # Two enlargements: 2 * 2 * 200.
 457 AT_PARSER_CHECK([./input 900], 0, [], [ignore])
 458 # Fails: beyond the limit of 10,000 (which we don't reach anyway since we
 459 # multiply by two starting at 200 => 5120 is the last possible).
 460 AT_PARSER_CHECK([./input 10000], 2, [], [ignore])
 461
 462 AT_CLEANUP
 463
 464
 465
 466
 467 ## -------------------------------------- ##
 468 ## Exploding the Stack Size with Malloc.  ##
 469 ## -------------------------------------- ##
 470
 471 AT_SETUP([Exploding the Stack Size with Malloc])
 472
 473 AT_DATA_STACK_TORTURE([[#define YYSTACK_USE_ALLOCA 0]])
 474
 475 # Below the limit of 200.
 476 AT_PARSER_CHECK([./input 20], 0, [], [ignore])
 477 # Two enlargements: 2 * 2 * 200.
 478 AT_PARSER_CHECK([./input 900], 0, [], [ignore])
 479 # Fails: beyond the limit of 10,000 (which we don't reach anyway since we
 480 # multiply by two starting at 200 => 5120 is the possible).
 481 AT_PARSER_CHECK([./input 10000], 2, [], [ignore])
 482
 483 AT_CLEANUP