Mercurial > gnulib
view m4/stdlib_h.m4 @ 37246:5cfb3a67238d
regex: avoid glibc deadlock during configure
glibc has a known bug where certain corruptions of the heap can
cause malloc to default to printing a debug message that includes
a backtrace, but the act of getting the backtrace uses dlopen
which in turn calls into malloc, causing a recursive lock ending
in deadlock. Thus, when configure is probing for a known glibc
heap corruption bug, the overall configure would hang.
The solution suggested by glibc developers is to force malloc
to quit printing debug messages, which avoids recursive malloc.
* m4/regex.m4 (gl_REGEX): Avoid recursive malloc deadlock when
glibc bug 15078 in turn triggers bug 16159.
Reported by Michal Privoznik.
Signed-off-by: Eric Blake <eblake@redhat.com>
author | Eric Blake <eblake@redhat.com> |
---|---|
date | Tue, 03 Dec 2013 10:34:13 -0700 |
parents | 5da735c1d624 |
children | 344018b6e5d7 |
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# stdlib_h.m4 serial 42 dnl Copyright (C) 2007-2013 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_STDLIB_H], [ AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) gl_NEXT_HEADERS([stdlib.h]) dnl Check for declarations of anything we want to poison if the dnl corresponding gnulib module is not in use, and which is not dnl guaranteed by C89. gl_WARN_ON_USE_PREPARE([[#include <stdlib.h> #if HAVE_SYS_LOADAVG_H # include <sys/loadavg.h> #endif #if HAVE_RANDOM_H # include <random.h> #endif ]], [_Exit atoll canonicalize_file_name getloadavg getsubopt grantpt initstate initstate_r mkdtemp mkostemp mkostemps mkstemp mkstemps posix_openpt ptsname ptsname_r random random_r realpath rpmatch secure_getenv setenv setstate setstate_r srandom srandom_r strtod strtoll strtoull unlockpt unsetenv]) ]) AC_DEFUN([gl_STDLIB_MODULE_INDICATOR], [ dnl Use AC_REQUIRE here, so that the default settings are expanded once only. AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) gl_MODULE_INDICATOR_SET_VARIABLE([$1]) dnl Define it also as a C macro, for the benefit of the unit tests. gl_MODULE_INDICATOR_FOR_TESTS([$1]) ]) AC_DEFUN([gl_STDLIB_H_DEFAULTS], [ GNULIB__EXIT=0; AC_SUBST([GNULIB__EXIT]) GNULIB_ATOLL=0; AC_SUBST([GNULIB_ATOLL]) GNULIB_CALLOC_POSIX=0; AC_SUBST([GNULIB_CALLOC_POSIX]) GNULIB_CANONICALIZE_FILE_NAME=0; AC_SUBST([GNULIB_CANONICALIZE_FILE_NAME]) GNULIB_GETLOADAVG=0; AC_SUBST([GNULIB_GETLOADAVG]) GNULIB_GETSUBOPT=0; AC_SUBST([GNULIB_GETSUBOPT]) GNULIB_GRANTPT=0; AC_SUBST([GNULIB_GRANTPT]) GNULIB_MALLOC_POSIX=0; AC_SUBST([GNULIB_MALLOC_POSIX]) GNULIB_MBTOWC=0; AC_SUBST([GNULIB_MBTOWC]) GNULIB_MKDTEMP=0; AC_SUBST([GNULIB_MKDTEMP]) GNULIB_MKOSTEMP=0; AC_SUBST([GNULIB_MKOSTEMP]) GNULIB_MKOSTEMPS=0; AC_SUBST([GNULIB_MKOSTEMPS]) GNULIB_MKSTEMP=0; AC_SUBST([GNULIB_MKSTEMP]) GNULIB_MKSTEMPS=0; AC_SUBST([GNULIB_MKSTEMPS]) GNULIB_POSIX_OPENPT=0; AC_SUBST([GNULIB_POSIX_OPENPT]) GNULIB_PTSNAME=0; AC_SUBST([GNULIB_PTSNAME]) GNULIB_PTSNAME_R=0; AC_SUBST([GNULIB_PTSNAME_R]) GNULIB_PUTENV=0; AC_SUBST([GNULIB_PUTENV]) GNULIB_RANDOM=0; AC_SUBST([GNULIB_RANDOM]) GNULIB_RANDOM_R=0; AC_SUBST([GNULIB_RANDOM_R]) GNULIB_REALLOC_POSIX=0; AC_SUBST([GNULIB_REALLOC_POSIX]) GNULIB_REALPATH=0; AC_SUBST([GNULIB_REALPATH]) GNULIB_RPMATCH=0; AC_SUBST([GNULIB_RPMATCH]) GNULIB_SECURE_GETENV=0; AC_SUBST([GNULIB_SECURE_GETENV]) GNULIB_SETENV=0; AC_SUBST([GNULIB_SETENV]) GNULIB_STRTOD=0; AC_SUBST([GNULIB_STRTOD]) GNULIB_STRTOLL=0; AC_SUBST([GNULIB_STRTOLL]) GNULIB_STRTOULL=0; AC_SUBST([GNULIB_STRTOULL]) GNULIB_SYSTEM_POSIX=0; AC_SUBST([GNULIB_SYSTEM_POSIX]) GNULIB_UNLOCKPT=0; AC_SUBST([GNULIB_UNLOCKPT]) GNULIB_UNSETENV=0; AC_SUBST([GNULIB_UNSETENV]) GNULIB_WCTOMB=0; AC_SUBST([GNULIB_WCTOMB]) dnl Assume proper GNU behavior unless another module says otherwise. HAVE__EXIT=1; AC_SUBST([HAVE__EXIT]) HAVE_ATOLL=1; AC_SUBST([HAVE_ATOLL]) HAVE_CANONICALIZE_FILE_NAME=1; AC_SUBST([HAVE_CANONICALIZE_FILE_NAME]) HAVE_DECL_GETLOADAVG=1; AC_SUBST([HAVE_DECL_GETLOADAVG]) HAVE_GETSUBOPT=1; AC_SUBST([HAVE_GETSUBOPT]) HAVE_GRANTPT=1; AC_SUBST([HAVE_GRANTPT]) HAVE_MKDTEMP=1; AC_SUBST([HAVE_MKDTEMP]) HAVE_MKOSTEMP=1; AC_SUBST([HAVE_MKOSTEMP]) HAVE_MKOSTEMPS=1; AC_SUBST([HAVE_MKOSTEMPS]) HAVE_MKSTEMP=1; AC_SUBST([HAVE_MKSTEMP]) HAVE_MKSTEMPS=1; AC_SUBST([HAVE_MKSTEMPS]) HAVE_POSIX_OPENPT=1; AC_SUBST([HAVE_POSIX_OPENPT]) HAVE_PTSNAME=1; AC_SUBST([HAVE_PTSNAME]) HAVE_PTSNAME_R=1; AC_SUBST([HAVE_PTSNAME_R]) HAVE_RANDOM=1; AC_SUBST([HAVE_RANDOM]) HAVE_RANDOM_H=1; AC_SUBST([HAVE_RANDOM_H]) HAVE_RANDOM_R=1; AC_SUBST([HAVE_RANDOM_R]) HAVE_REALPATH=1; AC_SUBST([HAVE_REALPATH]) HAVE_RPMATCH=1; AC_SUBST([HAVE_RPMATCH]) HAVE_SECURE_GETENV=1; AC_SUBST([HAVE_SECURE_GETENV]) HAVE_SETENV=1; AC_SUBST([HAVE_SETENV]) HAVE_DECL_SETENV=1; AC_SUBST([HAVE_DECL_SETENV]) HAVE_STRTOD=1; AC_SUBST([HAVE_STRTOD]) HAVE_STRTOLL=1; AC_SUBST([HAVE_STRTOLL]) HAVE_STRTOULL=1; AC_SUBST([HAVE_STRTOULL]) HAVE_STRUCT_RANDOM_DATA=1; AC_SUBST([HAVE_STRUCT_RANDOM_DATA]) HAVE_SYS_LOADAVG_H=0; AC_SUBST([HAVE_SYS_LOADAVG_H]) HAVE_UNLOCKPT=1; AC_SUBST([HAVE_UNLOCKPT]) HAVE_DECL_UNSETENV=1; AC_SUBST([HAVE_DECL_UNSETENV]) REPLACE_CALLOC=0; AC_SUBST([REPLACE_CALLOC]) REPLACE_CANONICALIZE_FILE_NAME=0; AC_SUBST([REPLACE_CANONICALIZE_FILE_NAME]) REPLACE_MALLOC=0; AC_SUBST([REPLACE_MALLOC]) REPLACE_MBTOWC=0; AC_SUBST([REPLACE_MBTOWC]) REPLACE_MKSTEMP=0; AC_SUBST([REPLACE_MKSTEMP]) REPLACE_PTSNAME=0; AC_SUBST([REPLACE_PTSNAME]) REPLACE_PTSNAME_R=0; AC_SUBST([REPLACE_PTSNAME_R]) REPLACE_PUTENV=0; AC_SUBST([REPLACE_PUTENV]) REPLACE_RANDOM_R=0; AC_SUBST([REPLACE_RANDOM_R]) REPLACE_REALLOC=0; AC_SUBST([REPLACE_REALLOC]) REPLACE_REALPATH=0; AC_SUBST([REPLACE_REALPATH]) REPLACE_SETENV=0; AC_SUBST([REPLACE_SETENV]) REPLACE_STRTOD=0; AC_SUBST([REPLACE_STRTOD]) REPLACE_UNSETENV=0; AC_SUBST([REPLACE_UNSETENV]) REPLACE_WCTOMB=0; AC_SUBST([REPLACE_WCTOMB]) ])