mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-03-09 12:23:04 +00:00
483 lines
9.5 KiB
Plaintext
483 lines
9.5 KiB
Plaintext
# Torturing Bison. -*- Autotest -*-
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# Copyright (C) 2001, 2002, 2004, 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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AT_BANNER([[Torture Tests.]])
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# AT_INCREASE_DATA_SIZE(SIZE)
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# ---------------------------
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# Try to increase the data size to SIZE KiB if possible.
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m4_define([AT_INCREASE_DATA_SIZE],
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[data_limit=`(ulimit -S -d) 2>/dev/null`
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case $data_limit in
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[[0-9]]*)
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if test "$data_limit" -lt $1; then
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AT_CHECK([ulimit -S -d $1 || exit 77])
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ulimit -S -d $1
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fi
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esac])
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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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]AT_DATA_GRAMMAR_PROLOGUE[
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%{
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#include <stdio.h>
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#include <stdlib.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 .. $max)
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{
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print "%token t$size $size \"$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 { if (\@S|@1 != 0) abort (); \$\$ = \@S|@1; }
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| input exp { if (\@S|@2 != \@S|@1 + 1) abort (); \$\$ = \@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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# With 500 and the new parser, which consume far too much memory,
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# it gets killed too. Of course the parser is to be cleaned.
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AT_DATA_TRIANGULAR_GRAMMAR([input.y], [200])
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AT_CHECK([bison -v -o input.c input.y])
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AT_COMPILE([input])
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AT_PARSER_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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]AT_DATA_GRAMMAR_PROLOGUE[
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%{
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#include <stdio.h>
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#include <stdlib.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 .. $max)
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{
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print "%token t$size $size \"$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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# GNU m4 requires about 70 MiB for this test on a 32-bit host.
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# Ask for 200 MiB, which should be plenty even on a 64-bit host.
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AT_INCREASE_DATA_SIZE(204000)
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AT_CHECK([bison -v -o input.c input.y])
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AT_COMPILE([input])
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AT_PARSER_CHECK([./input])
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AT_CLEANUP
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# AT_DATA_LOOK_AHEAD_TOKENS_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 look-ahead tokens.
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m4_define([AT_DATA_LOOK_AHEAD_TOKENS_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 = $ARGV[0] || 10;
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print <<EOF;
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%{
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#include <stdio.h>
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#include <stdlib.h>
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#define YYERROR_VERBOSE 1
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#define YYDEBUG 1
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static int yylex (void);
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static void yyerror (const char *msg);
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%}
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%union
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{
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int val;
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};
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%type <val> input exp
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%token token
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EOF
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print
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wrap ("%type <val> ",
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" ",
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map { "n$_" } (1 .. $max)),
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"\n";
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for my $count (1 .. $max)
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{
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print "%token t$count $count \"$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 { if (\@S|@1 != 1) abort (); \$\$ = \@S|@1; }
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| input exp { if (\@S|@2 != \@S|@1 + 1) abort (); \$\$ = \@S|@2; }
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;
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exp:
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n1 "1" { if (\@S|@1 != 1) abort (); }
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EOF
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for my $count (2 .. $max)
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{
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print "| n$count \"$count\" { if (\@S|@1 != $count) abort (); }\n";
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};
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print ";\n";
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for my $count (1 .. $max)
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{
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print "n$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 look-ahead tokens. ##
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## ------------------------ ##
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AT_SETUP([Many look-ahead tokens])
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AT_DATA_LOOK_AHEAD_TOKENS_GRAMMAR([input.y], [1000])
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# GNU m4 requires about 70 MiB for this test on a 32-bit host.
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# Ask for 200 MiB, which should be plenty even on a 64-bit host.
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AT_INCREASE_DATA_SIZE(204000)
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AT_CHECK([bison -v -o input.c input.y])
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AT_COMPILE([input])
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AT_PARSER_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 <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.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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%}
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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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}
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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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char *endp;
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if (argc != 2)
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abort ();
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yylval = strtol (argv[1], &endp, 10);
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if (! (argv[1] != endp
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&& 0 <= yylval && yylval <= INT_MAX
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&& errno != ERANGE))
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abort ();
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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 -o input.c input.y])
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AT_COMPILE([input])
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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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#if (defined __GNUC__ || defined __BUILTIN_VA_ARG_INCR \
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|| defined _AIX || defined _MSC_VER || defined _ALLOCA_H)
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# define YYSTACK_USE_ALLOCA 1
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#endif
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]])
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# Below the limit of 200.
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AT_PARSER_CHECK([./input 20], 0, [], [ignore])
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# Two enlargements: 2 * 2 * 200.
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AT_PARSER_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_PARSER_CHECK([./input 10000], 2, [], [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_PARSER_CHECK([./input 20], 0, [], [ignore])
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# Two enlargements: 2 * 2 * 200.
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AT_PARSER_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_PARSER_CHECK([./input 10000], 2, [], [ignore])
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AT_CLEANUP
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