X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/d88cf117910f0023d3a0f53c2380aec40a748c3d..faff3bef5b72ac85093799f997596631c3202c12:/tests/regression.at diff --git a/tests/regression.at b/tests/regression.at index 01a60c89..c2795f66 100644 --- a/tests/regression.at +++ b/tests/regression.at @@ -1,7 +1,6 @@ # Bison Regressions. -*- Autotest -*- -# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software -# Foundation, Inc. +# Copyright (C) 2001-2012 Free Software Foundation, Inc. # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by @@ -25,10 +24,11 @@ AT_BANNER([[Regression tests.]]) AT_SETUP([Trivial grammars]) +AT_BISON_OPTION_PUSHDEFS AT_DATA_GRAMMAR([input.y], [[%{ -void yyerror (char const *); -int yylex (void); +]AT_YYERROR_DECLARE_EXTERN[ +]AT_YYLEX_DECLARE_EXTERN[ #define YYSTYPE int * %} @@ -38,9 +38,10 @@ int yylex (void); program: 'x'; ]]) +AT_BISON_OPTION_POPDEFS AT_BISON_CHECK([-o input.c input.y]) -AT_COMPILE([input.o], [-c input.c]) +AT_COMPILE([input.o]) AT_COMPILE([input.o], [-DYYDEBUG -c input.c]) AT_CLEANUP @@ -53,10 +54,11 @@ AT_CLEANUP AT_SETUP([YYSTYPE typedef]) +AT_BISON_OPTION_PUSHDEFS AT_DATA_GRAMMAR([input.y], [[%{ -void yyerror (char const *); -int yylex (void); +]AT_YYERROR_DECLARE_EXTERN[ +]AT_YYLEX_DECLARE_EXTERN[ typedef union { char const *val; } YYSTYPE; %} @@ -66,9 +68,10 @@ typedef union { char const *val; } YYSTYPE; program: { $$ = ""; }; ]]) +AT_BISON_OPTION_POPDEFS AT_BISON_CHECK([-o input.c input.y]) -AT_COMPILE([input.o], [-c input.c]) +AT_COMPILE([input.o]) AT_CLEANUP @@ -84,10 +87,11 @@ AT_SETUP([Early token definitions with --yacc]) # Found in GCJ: they expect the tokens to be defined before the user # prologue, so that they can use the token definitions in it. +AT_BISON_OPTION_PUSHDEFS AT_DATA_GRAMMAR([input.y], [[%{ -void yyerror (const char *s); -int yylex (void); +]AT_YYERROR_DECLARE_EXTERN[ +]AT_YYLEX_DECLARE_EXTERN[ %} %union @@ -104,9 +108,10 @@ int yylex (void); exp: MY_TOKEN; %% ]]) +AT_BISON_OPTION_POPDEFS AT_BISON_CHECK([-y -o input.c input.y]) -AT_COMPILE([input.o], [-c input.c]) +AT_COMPILE([input.o]) AT_CLEANUP @@ -122,11 +127,12 @@ AT_SETUP([Early token definitions without --yacc]) # Found in GCJ: they expect the tokens to be defined before the user # prologue, so that they can use the token definitions in it. +AT_BISON_OPTION_PUSHDEFS AT_DATA_GRAMMAR([input.y], [[%{ #include -void yyerror (const char *s); -int yylex (void); +]AT_YYERROR_DECLARE_EXTERN[ +]AT_YYLEX_DECLARE_EXTERN[ void print_my_token (void); %} @@ -147,9 +153,10 @@ print_my_token (void) exp: MY_TOKEN; %% ]]) +AT_BISON_OPTION_POPDEFS AT_BISON_CHECK([-o input.c input.y]) -AT_COMPILE([input.o], [-c input.c]) +AT_COMPILE([input.o]) AT_CLEANUP @@ -162,13 +169,15 @@ AT_CLEANUP AT_SETUP([Braces parsing]) +AT_BISON_OPTION_PUSHDEFS AT_DATA([input.y], -[[/* Bison used to swallow the character after `}'. */ +[[/* Bison used to swallow the character after '}'. */ %% exp: { tests = {{{{{{{{{{}}}}}}}}}}; }; %% ]]) +AT_BISON_OPTION_POPDEFS AT_BISON_CHECK([-v -o input.c input.y]) @@ -184,8 +193,9 @@ AT_CLEANUP AT_SETUP([Duplicate string]) +AT_BISON_OPTION_PUSHDEFS AT_DATA([input.y], -[[/* `Bison -v' used to dump core when two tokens are defined with the same +[[/* 'Bison -v' used to dump core when two tokens are defined with the same string, as LE and GE below. */ %token NUM @@ -196,9 +206,10 @@ AT_DATA([input.y], exp: '(' exp ')' | NUM ; %% ]]) +AT_BISON_OPTION_POPDEFS AT_BISON_CHECK([-v -o input.c input.y], 0, [], -[[input.y:6.8-14: warning: symbol `"<="' used more than once as a literal string +[[input.y:6.8-14: warning: symbol "<=" used more than once as a literal string ]]) AT_CLEANUP @@ -212,6 +223,7 @@ AT_SETUP([Rule Line Numbers]) AT_KEYWORDS([report]) +AT_BISON_OPTION_PUSHDEFS AT_DATA([input.y], [[%% expr: @@ -241,6 +253,7 @@ expr: }; ]]) +AT_BISON_OPTION_POPDEFS AT_BISON_CHECK([-o input.c -v input.y]) @@ -388,13 +401,14 @@ default: 'a' } ]]) AT_BISON_CHECK([input.y], [1], [], -[[input.y:2.1: invalid character: `?' -input.y:3.14: invalid character: `}' -input.y:4.1: invalid character: `%' -input.y:4.2: invalid character: `&' -input.y:5.1-17: invalid directive: `%a-does-not-exist' -input.y:6.1-2: invalid directive: `%-' -input.y:7.1-8.0: missing `%}' at end of file +[[input.y:2.1: invalid character: '?' +input.y:3.14: invalid character: '}' +input.y:4.1: invalid character: '%' +input.y:4.2: invalid character: '&' +input.y:5.1-17: invalid directive: '%a-does-not-exist' +input.y:6.1: invalid character: '%' +input.y:6.2: invalid character: '-' +input.y:7.1-8.0: missing '%}' at end of file input.y:7.1-8.0: syntax error, unexpected %{...%} ]]) @@ -428,13 +442,14 @@ AT_CLEANUP AT_SETUP([Token definitions]) -# Bison managed, when fed with `%token 'f' "f"' to #define 'f'! +AT_BISON_OPTION_PUSHDEFS +# Bison managed, when fed with '%token 'f' "f"' to #define 'f'! AT_DATA_GRAMMAR([input.y], [%{ #include #include -void yyerror (const char *s); -int yylex (void); +]AT_YYERROR_DECLARE[ +]AT_YYLEX_DECLARE[ %} [%error-verbose %token MYEOF 0 "end of file" @@ -447,20 +462,8 @@ int yylex (void); %% exp: "a" "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"; %% -void -yyerror (char const *s) -{ - fprintf (stderr, "%s\n", s); -} - -int -yylex (void) -{ - static int called; - if (called++) - abort (); - return SPECIAL; -} +]AT_YYERROR_DEFINE[ +]AT_YYLEX_DEFINE([{ SPECIAL }])[ int main (void) @@ -468,6 +471,7 @@ main (void) return yyparse (); } ]]) +AT_BISON_OPTION_POPDEFS # Checking the warning message guarantees that the trigraph "??!" isn't # unnecessarily escaped here even though it would need to be if encoded in a @@ -475,7 +479,7 @@ main (void) # the user specification is eliminated. AT_BISON_CHECK([-o input.c input.y], [[0]], [[]], [[input.y:22.8-14: warning: symbol SPECIAL redeclared -input.y:22.8-63: warning: symbol `"\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!"' used more than once as a literal string +input.y:22.8-63: warning: symbol "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!" used more than once as a literal string ]]) AT_COMPILE([input]) @@ -498,22 +502,24 @@ AT_CLEANUP AT_SETUP([Characters Escapes]) +AT_BISON_OPTION_PUSHDEFS AT_DATA_GRAMMAR([input.y], [%{ -void yyerror (const char *s); -int yylex (void); +]AT_YYERROR_DECLARE_EXTERN[ +]AT_YYLEX_DECLARE_EXTERN[ %} [%% exp: '\'' "\'" | '\"' "\"" -| '"' "'" +| '"' "'" /* Pacify font-lock-mode: ". */ ; ]]) -# Pacify font-lock-mode: " + +AT_BISON_OPTION_POPDEFS AT_BISON_CHECK([-o input.c input.y]) -AT_COMPILE([input.o], [-c input.c]) +AT_COMPILE([input.o]) AT_CLEANUP @@ -524,7 +530,7 @@ AT_CLEANUP # The generation of the reduction was once wrong in Bison, and made it # miss some reductions. In the following test case, the reduction on -# `undef_id_tok' in state 1 was missing. This is stripped down from +# 'undef_id_tok' in state 1 was missing. This is stripped down from # the actual web2c.y. AT_SETUP([Web2c Report]) @@ -686,7 +692,7 @@ AT_CLEANUP ## Web2c Actions. ## ## --------------- ## -# The generation of the mapping `state -> action' was once wrong in +# The generation of the mapping 'state -> action' was once wrong in # extremely specific situations. web2c.y exhibits this situation. # Below is a stripped version of the grammar. It looks like one can # simplify it further, but just don't: it is tuned to exhibit a bug, @@ -769,7 +775,7 @@ static const yytype_uint8 yyrline[] = static const char *const yytname[] = { "$end", "error", "$undefined", "\"if\"", "\"const\"", "\"then\"", - "\"else\"", "$accept", "statement", "struct_stat", "if", "else", 0 + "\"else\"", "$accept", "statement", "struct_stat", "if", "else", YY_NULL }; static const yytype_uint16 yytoknum[] = { @@ -832,13 +838,11 @@ AT_CLEANUP # so that possible bound checking compilers could check all the skeletons. m4_define([_AT_DATA_DANCER_Y], [AT_DATA_GRAMMAR([dancer.y], -[%{ -static int yylex (AT_LALR1_CC_IF([int *], [void])); -AT_LALR1_CC_IF([], -[#include -#include -static void yyerror (const char *);]) -%} +[[%code provides +{ + ]AT_YYERROR_DECLARE[ + ]AT_YYLEX_DECLARE[ +} $1 %token ARROW INVALID NUMBER STRING DATA %defines @@ -883,15 +887,10 @@ member: STRING | INVALID ; %% -AT_LALR1_CC_IF( -[/* A C++ error reporting function. */ -void -yy::parser::error (const location&, const std::string& m) -{ - std::cerr << m << std::endl; -} - -int +]AT_YYERROR_DEFINE[ +]AT_YYLEX_DEFINE([":"])[ +]AT_LALR1_CC_IF( +[int yyparse () { yy::parser parser; @@ -900,33 +899,14 @@ yyparse () #endif return parser.parse (); } -], -[static void -yyerror (const char *s) -{ - fprintf (stderr, "%s\n", s); -}]) - -static int -yylex (AT_LALR1_CC_IF([int *lval], [void])) -[{ - static int const tokens[] = - { - ':', -1 - }; - static size_t toknum; - ]AT_LALR1_CC_IF([*lval = 0; /* Pacify GCC. */])[ - if (! (toknum < sizeof tokens / sizeof *tokens)) - abort (); - return tokens[toknum++]; -}] +])[ int main (void) { return yyparse (); } -]) +]]) ])# _AT_DATA_DANCER_Y @@ -960,12 +940,12 @@ AT_CHECK_DANCER([%skeleton "lalr1.cc"]) # -------------------------------- m4_define([_AT_DATA_EXPECT2_Y], [AT_DATA_GRAMMAR([expect2.y], -[%{ -static int yylex (AT_LALR1_CC_IF([int *], [void])); +[[%{ +static int yylex (]AT_LALR1_CC_IF([int *], [void])); AT_LALR1_CC_IF([], -[#include +[[#include #include -static void yyerror (const char *);]) +]AT_YYERROR_DECLARE])[ %} $1 %defines @@ -982,52 +962,41 @@ e: e '+' t | t; t: A | B; %% -AT_LALR1_CC_IF( -[/* A C++ error reporting function. */ -void -yy::parser::error (const location&, const std::string& m) -{ - std::cerr << m << std::endl; -} - -int +]AT_YYERROR_DEFINE[ +]AT_LALR1_CC_IF( +[int yyparse () { yy::parser parser; return parser.parse (); } -], -[static void -yyerror (const char *s) -{ - fprintf (stderr, "%s\n", s); -}]) +])[ +#include static int -yylex (AT_LALR1_CC_IF([int *lval], [void])) -[{ +yylex (]AT_LALR1_CC_IF([int *lval], [void])[) +{ static int const tokens[] = { 1000, '+', '+', -1 }; static size_t toknum; ]AT_LALR1_CC_IF([*lval = 0; /* Pacify GCC. */])[ - if (! (toknum < sizeof tokens / sizeof *tokens)) - abort (); + assert (toknum < sizeof tokens / sizeof *tokens); return tokens[toknum++]; -}] +} int main (void) { return yyparse (); } -]) +]]) ])# _AT_DATA_EXPECT2_Y # AT_CHECK_EXPECT2(BISON-OPTIONS) -# ------------------------------ +# ------------------------------- # Generate the grammar, compile it, run it. m4_define([AT_CHECK_EXPECT2], [AT_SETUP([Expecting two tokens $1]) @@ -1056,12 +1025,12 @@ AT_SETUP([Braced code in declaration in rules section]) # Bison once mistook braced code in a declaration in the rules section to be a # rule action. - +AT_BISON_OPTION_PUSHDEFS AT_DATA_GRAMMAR([input.y], [[%{ #include -static void yyerror (char const *msg); -static int yylex (void); +]AT_YYERROR_DECLARE[ +]AT_YYLEX_DECLARE[ %} %error-verbose @@ -1079,18 +1048,8 @@ start: %printer { fprintf (yyoutput, "PRINTER"); } 'a'; %% - -static void -yyerror (char const *msg) -{ - fprintf (stderr, "%s\n", msg); -} - -static int -yylex (void) -{ - return 'a'; -} +]AT_YYERROR_DEFINE[ +]AT_YYLEX_DEFINE(["a"])[ int main (void) @@ -1099,6 +1058,7 @@ main (void) return !yyparse (); } ]]) +AT_BISON_OPTION_POPDEFS AT_BISON_CHECK([-t -o input.c input.y]) AT_COMPILE([input]) @@ -1157,7 +1117,7 @@ AT_SETUP([[Extra lookahead sets in report]]) # state's one item that (1) is associated with the same rule as the reduction # and (2) has its dot at the end of its RHS. Previously, Bison also # erroneously printed the lookahead set next to all of the state's other items -# associated with the same rule. This bug affected only the `.output' file and +# associated with the same rule. This bug affected only the '.output' file and # not the generated parser source code. AT_DATA([[input.y]], @@ -1196,21 +1156,24 @@ AT_SETUP([[Token number in precedence declaration]]) # POSIX says token numbers can be declared in %left, %right, and %nonassoc, but # we lost this in Bison 1.50. - +AT_BISON_OPTION_PUSHDEFS AT_DATA_GRAMMAR([input.y], [[%{ #include - void yyerror (char const *); - int yylex (void); + ]AT_YYERROR_DECLARE[ + ]AT_YYLEX_DECLARE[ %} %error-verbose +%right END 0 %left TK1 1 TK2 2 "tok alias" 3 %% -start: TK1 sr_conflict "tok alias" ; - +start: + TK1 sr_conflict "tok alias" + | start %prec END + ; sr_conflict: TK2 | TK2 "tok alias" @@ -1218,19 +1181,8 @@ sr_conflict: %% -void -yyerror (char const *msg) -{ - fprintf (stderr, "%s\n", msg); -} - -int -yylex (void) -{ - static int const input[] = { 1, 2, 3, 0 }; - static int const *inputp = input; - return *inputp++; -} +]AT_YYERROR_DEFINE[ +]AT_YYLEX_DEFINE([{ 1, 2, 3, 0 }])[ int main (void) @@ -1238,9 +1190,11 @@ main (void) return yyparse (); } ]]) +AT_BISON_OPTION_POPDEFS AT_BISON_CHECK([[-o input.c input.y]], [[0]],, -[[input.y:24.5-19: warning: rule useless in parser due to conflicts: sr_conflict: TK2 "tok alias" +[[input.y:23.5-19: warning: rule useless in parser due to conflicts: start: start +input.y:27.5-19: warning: rule useless in parser due to conflicts: sr_conflict: TK2 "tok alias" ]]) AT_COMPILE([[input]]) AT_PARSER_CHECK([[./input]]) @@ -1263,9 +1217,11 @@ AT_SETUP([[parse-gram.y: LALR = IELR]]) [cp $abs_top_srcdir/src/parse-gram.y input.y] AT_BISON_CHECK([[-o input.c -Dlr.type=lalr input.y]]) [mv input.c lalr.c] +AT_CAPTURE_FILE([lalr.c]) AT_BISON_CHECK([[-o input.c -Dlr.type=ielr input.y]]) [mv input.c ielr.c] -AT_CHECK([[diff -u lalr.c ielr.c]]) +AT_CAPTURE_FILE([ielr.c]) +AT_CHECK([[diff lalr.c ielr.c]], [[0]]) AT_CLEANUP @@ -1277,11 +1233,12 @@ AT_CLEANUP AT_SETUP([[%error-verbose and YYSTACK_USE_ALLOCA]]) +AT_BISON_OPTION_PUSHDEFS AT_DATA_GRAMMAR([input.y], [[%code { #include - void yyerror (char const *); - int yylex (void); + ]AT_YYERROR_DECLARE[ + ]AT_YYLEX_DECLARE[ #define YYSTACK_USE_ALLOCA 1 } @@ -1317,28 +1274,18 @@ syntax_error: %% -void -yyerror (char const *msg) -{ - fprintf (stderr, "%s\n", msg); -} - -int -yylex (void) -{ - /* Induce two syntax error messages (which requires full error - recovery by shifting 3 tokens) in order to detect any loss of the - reallocated buffer. */ - static char const *input = "abc"; - return *input++; -} - +]AT_YYERROR_DEFINE[ +/* Induce two syntax error messages (which requires full error + recovery by shifting 3 tokens) in order to detect any loss of the + reallocated buffer. */ +]AT_YYLEX_DEFINE(["abc"])[ int main (void) { return yyparse (); } ]]) +AT_BISON_OPTION_POPDEFS AT_BISON_CHECK([[-o input.c input.y]]) AT_COMPILE([[input]]) @@ -1358,29 +1305,29 @@ AT_CLEANUP # Imagine the case where YYSTACK_ALLOC_MAXIMUM = YYSIZE_MAXIMUM and an # invocation of yysyntax_error has caused yymsg_alloc to grow to exactly # YYSTACK_ALLOC_MAXIMUM (perhaps because the normal doubling of size had -# to be clipped to YYSTACK_ALLOC_MAXIMUM). Now imagine a subsequent -# invocation of yysyntax_error that overflows during its size -# calculation and thus returns YYSIZE_MAXIMUM to yyparse. Then, yyparse -# will invoke yyerror using the old contents of yymsg. This bug needs -# to be fixed. +# to be clipped to YYSTACK_ALLOC_MAXIMUM). In an old version of yacc.c, +# a subsequent invocation of yysyntax_error that overflows during its +# size calculation would return YYSIZE_MAXIMUM to yyparse. Then, +# yyparse would invoke yyerror using the old contents of yymsg. AT_SETUP([[%error-verbose overflow]]) - -AT_XFAIL_IF([[:]]) - +AT_BISON_OPTION_PUSHDEFS AT_DATA_GRAMMAR([input.y], [[%code { #include - void yyerror (char const *); - int yylex (void); + ]AT_YYERROR_DECLARE[ + ]AT_YYLEX_DECLARE[ /* This prevents this test case from having to induce error messages large enough to overflow size_t. */ #define YYSIZE_T unsigned char - /* Bring in malloc so yacc.c doesn't try to provide a malloc prototype - using our YYSIZE_T. */ + /* Bring in malloc and set EXIT_SUCCESS so yacc.c doesn't try to + provide a malloc prototype using our YYSIZE_T. */ #include + #ifndef EXIT_SUCCESS + # define EXIT_SUCCESS 0 + #endif /* Max depth is usually much smaller than YYSTACK_ALLOC_MAXIMUM, and we don't want gcc to warn everywhere this constant would be too big @@ -1435,21 +1382,10 @@ syntax_error2: %% -void -yyerror (char const *msg) -{ - fprintf (stderr, "%s\n", msg); -} - -int -yylex (void) -{ - /* Induce two syntax error messages (which requires full error - recovery by shifting 3 tokens). */ - static char const *input = "abc"; - return *input++; -} - +]AT_YYERROR_DEFINE[ +/* Induce two syntax error messages (which requires full error + recovery by shifting 3 tokens). */ +]AT_YYLEX_DEFINE(["abc"])[ int main (void) { @@ -1475,5 +1411,177 @@ AT_PARSER_CHECK([[./input]], [[2]], [], syntax error memory exhausted ]]) +AT_BISON_OPTION_POPDEFS +AT_CLEANUP + + + +## ------------------------ ## +## LAC: Exploratory stack. ## +## ------------------------ ## + +AT_SETUP([[LAC: Exploratory stack]]) + +m4_pushdef([AT_LAC_CHECK], [ + +AT_BISON_OPTION_PUSHDEFS([$1]) + +AT_DATA_GRAMMAR([input.y], +[[%code { + #include + ]AT_YYERROR_DECLARE[ + int yylex (]AT_PURE_IF([[YYSTYPE *]], [[void]])[); +} + +]$1[ +%error-verbose +%token 'c' + +%% + +// default reductions in inconsistent states +// v v v v v v v v v v v v v v +S: A B A A B A A A A B A A A A A A A B C C A A A A A A A A A A A A B ; +// ^ ^ ^ +// LAC reallocs + +A: 'a' | /*empty*/ { printf ("inconsistent default reduction\n"); } ; +B: 'b' ; +C: /*empty*/ { printf ("consistent default reduction\n"); } ; + +%% +]AT_YYERROR_DEFINE[ +int +yylex (]AT_PURE_IF([[YYSTYPE *v]], [[void]])[) +{ + static char const *input = "bbbbc";]AT_PURE_IF([[ + *v = 0;]])[ + return *input++; +} + +int +main (void) +{ + yydebug = 1; + return yyparse (); +} +]]) + +AT_BISON_CHECK([[-Dparse.lac=full -Dparse.lac.es-capacity-initial=1 \ + -Dparse.lac.memory-trace=full \ + -t -o input.c input.y]], [[0]], [], +[[input.y: conflicts: 21 shift/reduce +]]) +AT_COMPILE([[input]]) +AT_PARSER_CHECK([[./input > stdout.txt 2> stderr.txt]], [[1]]) + +# Make sure syntax error doesn't forget that 'a' is expected. It would +# be forgotten without lookahead correction. +AT_CHECK([[grep 'syntax error,' stderr.txt]], [[0]], +[[syntax error, unexpected 'c', expecting 'a' or 'b' +]]) + +# Check number of default reductions in inconsistent states to be sure +# syntax error is detected before unnecessary reductions are performed. +AT_CHECK([[perl -0777 -ne 'print s/inconsistent default reduction//g;' \ + < stdout.txt || exit 77]], [[0]], [[14]]) + +# Check number of default reductions in consistent states to be sure +# it is performed before the syntax error is detected. +AT_CHECK([[perl -0777 -ne 'print s/\bconsistent default reduction//g;' \ + < stdout.txt || exit 77]], [[0]], [[2]]) + +# Check number of reallocs to be sure reallocated memory isn't somehow +# lost between LAC invocations. +AT_CHECK([[perl -0777 -ne 'print s/\(realloc//g;' < stderr.txt \ + || exit 77]], [[0]], [[3]]) + +AT_BISON_OPTION_POPDEFS +]) + +AT_LAC_CHECK([[%define api.push-pull pull]]) +AT_LAC_CHECK([[%define api.push-pull pull %define api.pure]]) +AT_LAC_CHECK([[%define api.push-pull both]]) +AT_LAC_CHECK([[%define api.push-pull both %define api.pure]]) + +m4_popdef([AT_LAC_CHECK]) + +AT_CLEANUP + + + +## ------------------------ ## +## LAC: Memory exhaustion. ## +## ------------------------ ## + +AT_SETUP([[LAC: Memory exhaustion]]) + +m4_pushdef([AT_LAC_CHECK], +[AT_BISON_OPTION_PUSHDEFS +AT_DATA_GRAMMAR([input.y], +[[%code { + #include + ]AT_YYERROR_DECLARE[ + ]AT_YYLEX_DECLARE[ + #define YYMAXDEPTH 8 +} + +%error-verbose + +%% + +S: A A A A A A A A A ; +A: /*empty*/ | 'a' ; + +%% +]AT_YYERROR_DEFINE[ +]AT_YYLEX_DEFINE(["$1"])[ +int +main (void) +{ + yydebug = 1; + return yyparse (); +} +]]) + +AT_BISON_CHECK([[-Dparse.lac=full -Dparse.lac.es-capacity-initial=1 \ + -t -o input.c input.y]], [[0]], [], +[[input.y: conflicts: 8 shift/reduce +]]) +AT_COMPILE([[input]]) +AT_BISON_OPTION_POPDEFS +]) + +# Check for memory exhaustion during parsing. +AT_LAC_CHECK([]) +AT_PARSER_CHECK([[./input]], [[2]], [], +[[Starting parse +Entering state 0 +Reading a token: Now at end of input. +LAC: initial context established for $end +LAC: checking lookahead $end: R2 G3 R2 G5 R2 G6 R2 G7 R2 G8 R2 G9 R2 G10 R2 G11 R2 (max size exceeded) +memory exhausted +Cleanup: discarding lookahead token $end () +Stack now 0 +]]) + +# Induce an immediate syntax error with an undefined token, and check +# for memory exhaustion while building syntax error message. +AT_LAC_CHECK([z], [[0]]) +AT_PARSER_CHECK([[./input]], [[2]], [], +[[Starting parse +Entering state 0 +Reading a token: Next token is token $undefined () +LAC: initial context established for $undefined +LAC: checking lookahead $undefined: Always Err +Constructing syntax error message +LAC: checking lookahead $end: R2 G3 R2 G5 R2 G6 R2 G7 R2 G8 R2 G9 R2 G10 R2 G11 R2 (max size exceeded) +syntax error +memory exhausted +Cleanup: discarding lookahead token $undefined () +Stack now 0 +]]) + +m4_popdef([AT_LAC_CHECK]) AT_CLEANUP