mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-03-09 12:23:04 +00:00
453 lines
8.7 KiB
Plaintext
453 lines
8.7 KiB
Plaintext
# Torturing Bison. -*- Autotest -*-
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# Copyright (C) 2001, 2002 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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# 02111-1307, USA.
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AT_BANNER([[Torture Tests.]])
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## ------------------------------------- ##
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## Creating a large artificial grammar. ##
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## ------------------------------------- ##
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# AT_DATA_TRIANGULAR_GRAMMAR(FILE-NAME, SIZE)
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# -------------------------------------------
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# Create FILE-NAME, containing a self checking parser for a huge
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# triangular grammar.
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m4_define([AT_DATA_TRIANGULAR_GRAMMAR],
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[AT_DATA([[gengram.pl]],
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[[#! /usr/bin/perl -w
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use strict;
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my $max = $ARGV[0] || 10;
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print <<EOF;
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%{
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#define YYERROR_VERBOSE 1
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#define YYDEBUG 1
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static int yylex (void);
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static void yyerror (const char *msg);
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%}
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%union
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{
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int val;
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};
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%token END "end"
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%type <val> exp input
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EOF
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for my $size (1 .. $max)
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{
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print "%token \"$size\" ", $size, "\n";
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};
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print <<EOF;
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%%
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input:
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exp { assert (\@S|@1 == 0); \$\$ = \@S|@1; }
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| input exp { assert (\@S|@2 == \@S|@1 + 1); \$\$ = \@S|@2; }
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;
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exp:
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END
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{ \$\$ = 0; }
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EOF
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for my $size (1 .. $max)
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{
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use Text::Wrap;
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print wrap ("| ", " ",
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(map { "\"$_\"" } (1 .. $size)),
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" END \n"),
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" { \$\$ = $size; }\n";
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};
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print ";\n";
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print <<EOF;
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%%
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static int
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yylex (void)
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{
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static int inner = 1;
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static int outer = 0;
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if (outer > $max)
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return 0;
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else if (inner > outer)
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{
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inner = 1;
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++outer;
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return END;
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}
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return inner++;
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}
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static void
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yyerror (const char *msg)
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{
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fprintf (stderr, "%s\\n", msg);
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}
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int
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main (void)
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{
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yydebug = !!getenv ("YYDEBUG");
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return yyparse ();
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}
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EOF
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]])
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AT_CHECK([perl -w ./gengram.pl $2 || exit 77], 0, [stdout])
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mv stdout $1
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])
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## -------------- ##
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## Big triangle. ##
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## -------------- ##
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AT_SETUP([Big triangle])
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# I have been able to go up to 2000 on my machine.
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# I tried 3000, a 29Mb grammar file, but then my system killed bison.
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AT_DATA_TRIANGULAR_GRAMMAR([input.y], [500])
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AT_CHECK([bison input.y -v -o input.c])
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AT_CHECK([$CC $CFLAGS $CPPFLAGS input.c -o input], 0, [], [ignore])
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AT_CHECK([./input])
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AT_CLEANUP
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# AT_DATA_HORIZONTAL_GRAMMAR(FILE-NAME, SIZE)
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# -------------------------------------------
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# Create FILE-NAME, containing a self checking parser for a huge
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# horizontal grammar.
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m4_define([AT_DATA_HORIZONTAL_GRAMMAR],
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[AT_DATA([[gengram.pl]],
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[[#! /usr/bin/perl -w
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use strict;
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my $max = $ARGV[0] || 10;
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print <<EOF;
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%{
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#define YYERROR_VERBOSE 1
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#define YYDEBUG 1
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static int yylex (void);
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static void yyerror (const char *msg);
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%}
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EOF
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for my $size (1 .. $max)
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{
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print "%token \"$size\" ", $size, "\n";
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};
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print <<EOF;
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%%
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EOF
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use Text::Wrap;
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print
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wrap ("exp: ", " ",
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(map { "\"$_\"" } (1 .. $max)), ";"),
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"\n";
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print <<EOF;
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%%
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static int
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yylex (void)
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{
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static int counter = 1;
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if (counter > $max)
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return 0;
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else
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return counter++;
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}
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static void
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yyerror (const char *msg)
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{
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fprintf (stderr, "%s\\n", msg);
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}
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int
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main (void)
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{
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yydebug = !!getenv ("YYDEBUG");
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return yyparse ();
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}
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EOF
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]])
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AT_CHECK([perl -w ./gengram.pl $2 || exit 77], 0, [stdout])
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mv stdout $1
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])
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## ---------------- ##
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## Big horizontal. ##
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## ---------------- ##
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AT_SETUP([Big horizontal])
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# I have been able to go up to 10000 on my machine, but I had to
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# increase the maximum stack size (* 100). It gave:
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#
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# input.y 263k
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# input.tab.c 1.3M
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# input 453k
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#
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# gengram.pl 10000 0.70s user 0.01s sys 99% cpu 0.711 total
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# bison input.y 730.56s user 0.53s sys 99% cpu 12:12.34 total
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# gcc -Wall input.tab.c -o input 5.81s user 0.20s sys 100% cpu 6.01 total
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# ./input 0.00s user 0.01s sys 108% cpu 0.01 total
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#
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AT_DATA_HORIZONTAL_GRAMMAR([input.y], [1000])
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AT_CHECK([bison input.y -v -o input.c])
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AT_CHECK([$CC $CFLAGS $CPPFLAGS input.c -o input], 0, [], [ignore])
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AT_CHECK([./input])
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AT_CLEANUP
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# AT_DATA_LOOKAHEADS_GRAMMAR(FILE-NAME, SIZE)
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# -------------------------------------------
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# Create FILE-NAME, containing a self checking parser for a grammar
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# requiring SIZE lookaheads.
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m4_define([AT_DATA_LOOKAHEADS_GRAMMAR],
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[AT_DATA([[gengram.pl]],
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[[#! /usr/bin/perl -w
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use strict;
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use Text::Wrap;
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my $max = $ARGV[0] || 10;
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print <<EOF;
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%{
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#define YYERROR_VERBOSE 1
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#define YYDEBUG 1
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static int yylex (void);
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static void yyerror (const char *msg);
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%}
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%union
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{
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int val;
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};
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%type <val> input exp
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%token token
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EOF
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print
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wrap ("%type <val> ",
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" ",
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map { "token$_" } (1 .. $max)),
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"\n";
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for my $count (1 .. $max)
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{
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print "%token \"$count\" $count\n";
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};
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print <<EOF;
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%%
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input:
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exp { assert (\@S|@1 == 1); \$\$ = \@S|@1; }
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| input exp { assert (\@S|@2 == \@S|@1 + 1); \$\$ = \@S|@2; }
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;
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exp:
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token1 "1" { assert (\@S|@1 == 1); }
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EOF
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for my $count (2 .. $max)
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{
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print "| token$count \"$count\" { assert (\@S|@1 == $count); }\n";
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};
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print ";\n";
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for my $count (1 .. $max)
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{
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print "token$count: token { \$\$ = $count; };\n";
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};
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print <<EOF;
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%%
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static int
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yylex (void)
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{
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static int return_token = 1;
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static int counter = 1;
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if (counter > $max)
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return 0;
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if (return_token)
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{
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return_token = 0;
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return token;
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}
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return_token = 1;
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return counter++;
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}
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static void
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yyerror (const char *msg)
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{
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fprintf (stderr, "%s\\n", msg);
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}
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int
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main (void)
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{
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yydebug = !!getenv ("YYDEBUG");
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return yyparse ();
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}
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EOF
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]])
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AT_CHECK([perl -w ./gengram.pl $2 || exit 77], 0, [stdout])
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mv stdout $1
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])
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## ----------------- ##
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## Many lookaheads. ##
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## ----------------- ##
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AT_SETUP([Many lookaheads])
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AT_DATA_LOOKAHEADS_GRAMMAR([input.y], [1000])
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AT_CHECK([bison input.y -v -o input.c])
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AT_CHECK([$CC $CFLAGS $CPPFLAGS input.c -o input], 0, [], [ignore])
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AT_CHECK([./input])
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AT_CLEANUP
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# AT_DATA_STACK_TORTURE(C-PROLOGUE)
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# ---------------------------------
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# A parser specialized in torturing the stack size.
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m4_define([AT_DATA_STACK_TORTURE],
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[# A grammar of parens growing the stack thanks to right recursion.
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# exp:
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AT_DATA([input.y],
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[[%{
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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]$1[
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static int yylex (void);
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static void yyerror (const char *msg);
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#define YYPRINT(File, Type, Value) \
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fprintf (File, " (%d, stack size = %d, max = %d)", \
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Value, yyssp - yyss + 1, yystacksize);
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%}
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%error-verbose
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%debug
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%token WAIT_FOR_EOF
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%%
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exp: WAIT_FOR_EOF exp | ;
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%%
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static void
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yyerror (const char *msg)
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{
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fprintf (stderr, "%s\n", msg);
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exit (1);
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}
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/* There are YYLVAL_MAX of WAIT_FOR_EOFs. */
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unsigned int yylval_max;
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static int
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yylex (void)
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{
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if (yylval--)
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return WAIT_FOR_EOF;
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else
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return EOF;
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}
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int
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main (int argc, const char **argv)
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{
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assert (argc == 2);
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yylval = atoi (argv[1]);
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yydebug = 1;
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return yyparse ();
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}
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]])
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AT_CHECK([bison input.y -o input.c])
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AT_CHECK([$CC $CFLAGS $CPPFLAGS input.c -o input], 0, [], [ignore])
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])
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## -------------------------------------- ##
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## Exploding the Stack Size with Alloca. ##
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## -------------------------------------- ##
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AT_SETUP([Exploding the Stack Size with Alloca])
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AT_DATA_STACK_TORTURE
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# Below the limit of 200.
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AT_CHECK([./input 20], 0, [], [ignore])
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# Two enlargements: 2 * 2 * 200.
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AT_CHECK([./input 900], 0, [], [ignore])
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# Fails: beyond the limit of 10,000 (which we don't reach anyway since we
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# multiply by two starting at 200 => 5120 is the last possible).
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AT_CHECK([./input 10000], 1, [], [ignore])
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AT_CLEANUP
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## -------------------------------------- ##
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## Exploding the Stack Size with Malloc. ##
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## -------------------------------------- ##
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AT_SETUP([Exploding the Stack Size with Malloc])
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AT_DATA_STACK_TORTURE([[#define YYSTACK_USE_ALLOCA 0]])
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# Below the limit of 200.
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AT_CHECK([./input 20], 0, [], [ignore])
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# Two enlargements: 2 * 2 * 200.
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AT_CHECK([./input 900], 0, [], [ignore])
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# Fails: beyond the limit of 10,000 (which we don't reach anyway since we
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# multiply by two starting at 200 => 5120 is the possible).
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AT_CHECK([./input 10000], 1, [], [ignore])
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AT_CLEANUP
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