X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/11c4e57daf46a0f465716621d56e780bf7b0c860..ea6046b9f6f8ab16f2f0f03a0d15499243971ae2:/tests/regression.at diff --git a/tests/regression.at b/tests/regression.at index fa2278a8..544565ad 100644 --- a/tests/regression.at +++ b/tests/regression.at @@ -1,7 +1,7 @@ # Bison Regressions. -*- Autotest -*- -# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software -# Foundation, Inc. +# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, +# 2010 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 @@ -393,8 +393,7 @@ 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:6.1-2: invalid directive: `%-' input.y:7.1-8.0: missing `%}' at end of file input.y:7.1-8.0: syntax error, unexpected %{...%} ]]) @@ -1250,24 +1249,231 @@ AT_CLEANUP -## ----------------------------------------------- ## -## Fix user actions without a trailing semicolon. ## -## ----------------------------------------------- ## +## --------------------------- ## +## parse-gram.y: LALR = IELR. ## +## --------------------------- ## -AT_SETUP([[Fix user actions without a trailing semicolon]]) +# If parse-gram.y's LALR and IELR parser tables ever begin to differ, we +# need to fix parse-gram.y or start using IELR. -# This feature is undocumented, but we accidentally broke it in 2.3a, and there -# was a complaint at: -# . +AT_SETUP([[parse-gram.y: LALR = IELR]]) -AT_DATA([input.y], -[[%% -start: {asdffdsa} ; +# Avoid differences in synclines by telling bison that the output files +# have the same name. +[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_BISON_CHECK([[-o input.c -Dlr.type=ielr input.y]]) +[mv input.c ielr.c] +AT_CHECK([[diff -u lalr.c ielr.c]]) + +AT_CLEANUP + + + +## --------------------------------------- ## +## %error-verbose and YYSTACK_USE_ALLOCA. ## +## --------------------------------------- ## + +AT_SETUP([[%error-verbose and YYSTACK_USE_ALLOCA]]) + +AT_DATA_GRAMMAR([input.y], +[[%code { + #include + void yyerror (char const *); + int yylex (void); + #define YYSTACK_USE_ALLOCA 1 +} + +%error-verbose + +%% + +start: check syntax_error syntax_error ; + +check: +{ + if (128 < sizeof yymsgbuf) + { + fprintf (stderr, + "The initial size of yymsgbuf in yyparse has increased\n" + "since this test group was last updated. As a result,\n" + "this test group may no longer manage to induce a\n" + "reallocation of the syntax error message buffer.\n" + "This test group must be adjusted to produce a longer\n" + "error message.\n"); + YYABORT; + } +} +; + +// Induce a syntax error message whose total length is more than +// sizeof yymsgbuf in yyparse. Each token here is 64 bytes. +syntax_error: + "123456789112345678921234567893123456789412345678951234567896123A" +| "123456789112345678921234567893123456789412345678951234567896123B" +| error 'a' 'b' 'c' +; + +%% + +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++; +} + +int +main (void) +{ + return yyparse (); +} +]]) + +AT_BISON_CHECK([[-o input.c input.y]]) +AT_COMPILE([[input]]) +AT_PARSER_CHECK([[./input]], [[1]], [], +[[syntax error, unexpected 'a', expecting 123456789112345678921234567893123456789412345678951234567896123A or 123456789112345678921234567893123456789412345678951234567896123B +syntax error, unexpected $end, expecting 123456789112345678921234567893123456789412345678951234567896123A or 123456789112345678921234567893123456789412345678951234567896123B +]]) + +AT_CLEANUP + + + +## ------------------------- ## +## %error-verbose overflow. ## +## ------------------------- ## + +# 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). 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_DATA_GRAMMAR([input.y], +[[%code { + #include + void yyerror (char const *); + int yylex (void); + + /* 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 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 + to make sense for our YYSIZE_T. */ + #define YYMAXDEPTH 100 +} + +%error-verbose + +%% + +start: syntax_error1 check syntax_error2 ; + +// Induce a syntax error message whose total length causes yymsg in +// yyparse to be reallocated to size YYSTACK_ALLOC_MAXIMUM, which +// should be 255. Each token here is 64 bytes. +syntax_error1: + "123456789112345678921234567893123456789412345678951234567896123A" +| "123456789112345678921234567893123456789412345678951234567896123B" +| "123456789112345678921234567893123456789412345678951234567896123C" +| error 'a' 'b' 'c' +; + +check: +{ + if (yymsg_alloc != YYSTACK_ALLOC_MAXIMUM + || YYSTACK_ALLOC_MAXIMUM != YYSIZE_MAXIMUM + || YYSIZE_MAXIMUM != 255) + { + fprintf (stderr, + "The assumptions of this test group are no longer\n" + "valid, so it may no longer catch the error it was\n" + "designed to catch. Specifically, the following\n" + "values should all be 255:\n\n"); + fprintf (stderr, " yymsg_alloc = %d\n", yymsg_alloc); + fprintf (stderr, " YYSTACK_ALLOC_MAXIMUM = %d\n", + YYSTACK_ALLOC_MAXIMUM); + fprintf (stderr, " YYSIZE_MAXIMUM = %d\n", YYSIZE_MAXIMUM); + YYABORT; + } +} +; + +// Now overflow. +syntax_error2: + "123456789112345678921234567893123456789412345678951234567896123A" +| "123456789112345678921234567893123456789412345678951234567896123B" +| "123456789112345678921234567893123456789412345678951234567896123C" +| "123456789112345678921234567893123456789412345678951234567896123D" +| "123456789112345678921234567893123456789412345678951234567896123E" +; + +%% + +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++; +} + +int +main (void) +{ + /* Push parsers throw away the message buffer between tokens, so skip + this test under maintainer-push-check. */ + if (YYPUSH) + return 77; + return yyparse (); +} ]]) AT_BISON_CHECK([[-o input.c input.y]]) -AT_CHECK([[sed -n '/asdffdsa/s/^ *//p' input.c]], [[0]], -[[{asdffdsa;} + +# gcc warns about tautologies and fallacies involving comparisons for +# unsigned char. However, it doesn't produce these same warnings for +# size_t and many other types when the warnings would seem to make just +# as much sense. We ignore the warnings. +[CFLAGS="$NO_WERROR_CFLAGS"] +AT_COMPILE([[input]]) + +AT_PARSER_CHECK([[./input]], [[2]], [], +[[syntax error, unexpected 'a', expecting 123456789112345678921234567893123456789412345678951234567896123A or 123456789112345678921234567893123456789412345678951234567896123B or 123456789112345678921234567893123456789412345678951234567896123C +syntax error +memory exhausted ]]) AT_CLEANUP