tests/torture.at

   1 # Torturing Bison.                                    -*- Autotest -*-
   2 # Copyright (C) 2001, 2002 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., 59 Temple Place - Suite 330, Boston, MA
  17 # 02111-1307, 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     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 %{
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55
  56 #define YYERROR_VERBOSE 1
  57 #define YYDEBUG 1
  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 %{
 169 #include <stdio.h>
 170 #include <stdlib.h>
 171
 172 #define YYERROR_VERBOSE 1
 173 #define YYDEBUG 1
 174
 175 static int yylex (void);
 176 static void yyerror (const char *msg);
 177 %}
 178 EOF
 179
 180 for my $size (1 .. $max)
 181   {
 182     print "%token t$size $size \"$size\"\n";
 183   };
 184
 185 print <<EOF;
 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 0;
 203   else
 204   return counter++;
 205 }
 206
 207 static void
 208 yyerror (const char *msg)
 209 {
 210   fprintf (stderr, "%s\\n", msg);
 211 }
 212
 213 int
 214 main (void)
 215 {
 216   yydebug = !!getenv ("YYDEBUG");
 217   return yyparse ();
 218 }
 219 EOF
 220 ]])
 221
 222 AT_CHECK([perl -w ./gengram.pl $2 || exit 77], 0, [stdout])
 223 mv stdout $1
 224 ])
 225
 226
 227 ## ---------------- ##
 228 ## Big horizontal.  ##
 229 ## ---------------- ##
 230
 231 AT_SETUP([Big horizontal])
 232
 233 # I have been able to go up to 10000 on my machine, but I had to
 234 # increase the maximum stack size (* 100).  It gave:
 235 #
 236 # input.y      263k
 237 # input.tab.c  1.3M
 238 # input        453k
 239 #
 240 # gengram.pl 10000                 0.70s user 0.01s sys  99% cpu    0.711 total
 241 # bison input.y                  730.56s user 0.53s sys  99% cpu 12:12.34 total
 242 # gcc -Wall input.tab.c -o input   5.81s user 0.20s sys 100% cpu     6.01 total
 243 # ./input                          0.00s user 0.01s sys 108% cpu     0.01 total
 244 #
 245 AT_DATA_HORIZONTAL_GRAMMAR([input.y], [1000])
 246
 247 # GNU m4 requires about 70 MiB for this test on a 32-bit host.
 248 # Ask for 200 MiB, which should be plenty even on a 64-bit host.
 249 AT_INCREASE_DATA_SIZE(204000)
 250
 251 AT_CHECK([bison -v -o input.c input.y])
 252 AT_COMPILE([input])
 253 AT_PARSER_CHECK([./input])
 254
 255 AT_CLEANUP
 256
 257
 258
 259 # AT_DATA_LOOKAHEADS_GRAMMAR(FILE-NAME, SIZE)
 260 # -------------------------------------------
 261 # Create FILE-NAME, containing a self checking parser for a grammar
 262 # requiring SIZE lookaheads.
 263 m4_define([AT_DATA_LOOKAHEADS_GRAMMAR],
 264 [AT_DATA([[gengram.pl]],
 265 [[#! /usr/bin/perl -w
 266
 267 use strict;
 268 use Text::Wrap;
 269 my $max = $ARGV[0] || 10;
 270
 271 print <<EOF;
 272 %{
 273 #include <stdio.h>
 274 #include <stdlib.h>
 275
 276 #define YYERROR_VERBOSE 1
 277 #define YYDEBUG 1
 278
 279 static int yylex (void);
 280 static void yyerror (const char *msg);
 281 %}
 282 %union
 283 {
 284   int val;
 285 };
 286
 287 %type <val> input exp
 288 %token token
 289 EOF
 290
 291 print
 292   wrap ("%type <val> ",
 293         "            ",
 294         map { "n$_" } (1 .. $max)),
 295   "\n";
 296
 297 for my $count (1 .. $max)
 298   {
 299     print "%token t$count $count \"$count\"\n";
 300   };
 301
 302 print <<EOF;
 303 %%
 304 input:
 305   exp        { if (\@S|@1 != 1) abort (); \$\$ = \@S|@1; }
 306 | input exp  { if (\@S|@2 != \@S|@1 + 1) abort (); \$\$ = \@S|@2; }
 307 ;
 308
 309 exp:
 310   n1 "1" { if (\@S|@1 != 1) abort (); }
 311 EOF
 312
 313 for my $count (2 .. $max)
 314   {
 315     print "| n$count \"$count\" { if (\@S|@1 != $count) abort (); }\n";
 316   };
 317 print ";\n";
 318
 319 for my $count (1 .. $max)
 320   {
 321     print "n$count: token { \$\$ = $count; };\n";
 322   };
 323
 324 print <<EOF;
 325 %%
 326 static int
 327 yylex (void)
 328 {
 329   static int return_token = 1;
 330   static int counter = 1;
 331   if (counter > $max)
 332     return 0;
 333   if (return_token)
 334     {
 335       return_token = 0;
 336       return token;
 337     }
 338   return_token = 1;
 339   return counter++;
 340 }
 341
 342 static void
 343 yyerror (const char *msg)
 344 {
 345   fprintf (stderr, "%s\\n", msg);
 346 }
 347
 348 int
 349 main (void)
 350 {
 351   yydebug = !!getenv ("YYDEBUG");
 352   return yyparse ();
 353 }
 354 EOF
 355 ]])
 356
 357 AT_CHECK([perl -w ./gengram.pl $2 || exit 77], 0, [stdout])
 358 mv stdout $1
 359 ])
 360
 361
 362 ## ----------------- ##
 363 ## Many lookaheads.  ##
 364 ## ----------------- ##
 365
 366 AT_SETUP([Many lookaheads])
 367
 368 AT_DATA_LOOKAHEADS_GRAMMAR([input.y], [1000])
 369
 370 # GNU m4 requires about 70 MiB for this test on a 32-bit host.
 371 # Ask for 200 MiB, which should be plenty even on a 64-bit host.
 372 AT_INCREASE_DATA_SIZE(204000)
 373
 374 AT_CHECK([bison -v -o input.c input.y])
 375 AT_COMPILE([input])
 376 AT_PARSER_CHECK([./input])
 377
 378 AT_CLEANUP
 379
 380
 381
 382 # AT_DATA_STACK_TORTURE(C-PROLOGUE)
 383 # ---------------------------------
 384 # A parser specialized in torturing the stack size.
 385 m4_define([AT_DATA_STACK_TORTURE],
 386 [# A grammar of parens growing the stack thanks to right recursion.
 387 # exp:
 388 AT_DATA([input.y],
 389 [[%{
 390 #include <stdio.h>
 391 #include <stdlib.h>
 392 ]$1[
 393   static int yylex (void);
 394   static void yyerror (const char *msg);
 395 %}
 396 %error-verbose
 397 %debug
 398 %token WAIT_FOR_EOF
 399 %%
 400 exp: WAIT_FOR_EOF exp | ;
 401 %%
 402 static void
 403 yyerror (const char *msg)
 404 {
 405   fprintf (stderr, "%s\n", msg);
 406   exit (1);
 407 }
 408
 409 /* There are YYLVAL_MAX of WAIT_FOR_EOFs. */
 410 unsigned int yylval_max;
 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   if (argc != 2)
 425     abort ();
 426   yylval = atoi (argv[1]);
 427   yydebug = 1;
 428   return yyparse ();
 429 }
 430 ]])
 431 AT_CHECK([bison -o input.c input.y])
 432 AT_COMPILE([input])
 433 ])
 434
 435
 436 ## -------------------------------------- ##
 437 ## Exploding the Stack Size with Alloca.  ##
 438 ## -------------------------------------- ##
 439
 440 AT_SETUP([Exploding the Stack Size with Alloca])
 441
 442 AT_DATA_STACK_TORTURE
 443
 444 # Below the limit of 200.
 445 AT_PARSER_CHECK([./input 20], 0, [], [ignore])
 446 # Two enlargements: 2 * 2 * 200.
 447 AT_PARSER_CHECK([./input 900], 0, [], [ignore])
 448 # Fails: beyond the limit of 10,000 (which we don't reach anyway since we
 449 # multiply by two starting at 200 => 5120 is the last possible).
 450 AT_PARSER_CHECK([./input 10000], 1, [], [ignore])
 451
 452 AT_CLEANUP
 453
 454
 455
 456
 457 ## -------------------------------------- ##
 458 ## Exploding the Stack Size with Malloc.  ##
 459 ## -------------------------------------- ##
 460
 461 AT_SETUP([Exploding the Stack Size with Malloc])
 462
 463 AT_DATA_STACK_TORTURE([[#define YYSTACK_USE_ALLOCA 0]])
 464
 465 # Below the limit of 200.
 466 AT_PARSER_CHECK([./input 20], 0, [], [ignore])
 467 # Two enlargements: 2 * 2 * 200.
 468 AT_PARSER_CHECK([./input 900], 0, [], [ignore])
 469 # Fails: beyond the limit of 10,000 (which we don't reach anyway since we
 470 # multiply by two starting at 200 => 5120 is the possible).
 471 AT_PARSER_CHECK([./input 10000], 1, [], [ignore])
 472
 473 AT_CLEANUP