diff options
Diffstat (limited to 'm4/regex.m4')
| -rw-r--r-- | m4/regex.m4 | 119 |
1 files changed, 93 insertions, 26 deletions
diff --git a/m4/regex.m4 b/m4/regex.m4 index 41be5e8..abfd262 100644 --- a/m4/regex.m4 +++ b/m4/regex.m4 @@ -1,6 +1,6 @@ -# serial 61 +# serial 66 -# Copyright (C) 1996-2001, 2003-2012 Free Software Foundation, Inc. +# Copyright (C) 1996-2001, 2003-2016 Free Software Foundation, Inc. # # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, @@ -27,15 +27,32 @@ AC_DEFUN([gl_REGEX], # following run test, then default to *not* using the included regex.c. # If cross compiling, assume the test would fail and use the included # regex.c. + AC_CHECK_DECLS_ONCE([alarm]) + AC_CHECK_HEADERS_ONCE([malloc.h]) AC_CACHE_CHECK([for working re_compile_pattern], [gl_cv_func_re_compile_pattern_working], [AC_RUN_IFELSE( [AC_LANG_PROGRAM( - [AC_INCLUDES_DEFAULT[ - #include <locale.h> - #include <limits.h> - #include <regex.h> - ]], + [[#include <regex.h> + + #include <locale.h> + #include <limits.h> + #include <string.h> + + #if defined M_CHECK_ACTION || HAVE_DECL_ALARM + # include <signal.h> + # include <unistd.h> + #endif + + #if HAVE_MALLOC_H + # include <malloc.h> + #endif + + #ifdef M_CHECK_ACTION + /* Exit with distinguishable exit code. */ + static void sigabrt_no_core (int sig) { raise (SIGTERM); } + #endif + ]], [[int result = 0; static struct re_pattern_buffer regex; unsigned char folded_chars[UCHAR_MAX + 1]; @@ -43,26 +60,74 @@ AC_DEFUN([gl_REGEX], const char *s; struct re_registers regs; - /* http://sourceware.org/ml/libc-hacker/2006-09/msg00008.html - This test needs valgrind to catch the bug on Debian - GNU/Linux 3.1 x86, but it might catch the bug better - on other platforms and it shouldn't hurt to try the - test here. */ + /* Some builds of glibc go into an infinite loop on this + test. Use alarm to force death, and mallopt to avoid + malloc recursion in diagnosing the corrupted heap. */ +#if HAVE_DECL_ALARM + signal (SIGALRM, SIG_DFL); + alarm (2); +#endif +#ifdef M_CHECK_ACTION + signal (SIGABRT, sigabrt_no_core); + mallopt (M_CHECK_ACTION, 2); +#endif + if (setlocale (LC_ALL, "en_US.UTF-8")) { - static char const pat[] = "insert into"; - static char const data[] = - "\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK"; - re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE - | RE_ICASE); - memset (®ex, 0, sizeof regex); - s = re_compile_pattern (pat, sizeof pat - 1, ®ex); - if (s) - result |= 1; - else if (re_search (®ex, data, sizeof data - 1, - 0, sizeof data - 1, ®s) - != -1) - result |= 1; + { + /* http://sourceware.org/ml/libc-hacker/2006-09/msg00008.html + This test needs valgrind to catch the bug on Debian + GNU/Linux 3.1 x86, but it might catch the bug better + on other platforms and it shouldn't hurt to try the + test here. */ + static char const pat[] = "insert into"; + static char const data[] = + "\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK"; + re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE + | RE_ICASE); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern (pat, sizeof pat - 1, ®ex); + if (s) + result |= 1; + else if (re_search (®ex, data, sizeof data - 1, + 0, sizeof data - 1, ®s) + != -1) + result |= 1; + regfree (®ex); + } + + { + /* This test is from glibc bug 15078. + The test case is from Andreas Schwab in + <http://www.sourceware.org/ml/libc-alpha/2013-01/msg00967.html>. + */ + static char const pat[] = "[^x]x"; + static char const data[] = + /* <U1000><U103B><U103D><U1014><U103A><U102F><U1015><U103A> */ + "\xe1\x80\x80" + "\xe1\x80\xbb" + "\xe1\x80\xbd" + "\xe1\x80\x94" + "\xe1\x80\xba" + "\xe1\x80\xaf" + "\xe1\x80\x95" + "\xe1\x80\xba" + "x"; + re_set_syntax (0); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern (pat, sizeof pat - 1, ®ex); + if (s) + result |= 1; + else + { + i = re_search (®ex, data, sizeof data - 1, + 0, sizeof data - 1, 0); + if (i != 0 && i != 21) + result |= 1; + } + regfree (®ex); + } + if (! setlocale (LC_ALL, "C")) return 1; } @@ -220,7 +285,9 @@ AC_DEFUN([gl_PREREQ_REGEX], AC_REQUIRE([AC_C_INLINE]) AC_REQUIRE([AC_C_RESTRICT]) AC_REQUIRE([AC_TYPE_MBSTATE_T]) + AC_REQUIRE([gl_EEMALLOC]) + AC_REQUIRE([gl_GLIBC21]) AC_CHECK_HEADERS([libintl.h]) - AC_CHECK_FUNCS_ONCE([isblank iswctype wcscoll]) + AC_CHECK_FUNCS_ONCE([isblank iswctype]) AC_CHECK_DECLS([isblank], [], [], [[#include <ctype.h>]]) ]) |