Re: PHP 4.0 Bug #4558: segfault on client request (linux & mod_php )

If you installed MySQL from a recent rpm release chances are you installed a client library that was linked against pthreads. There is a bug in glibc-2.1 that causes problems from something that isn't linked against pthreads loading something that is. The easiest fix is to grab the MySQL source tarball and compile the non-threaded client library and link against that instead. The MySQL guys are aware of this and will be putting a non-threaded client rpm on their site soon now. -Rasmus On Wed, 24 May 2000, Roger Foskett (2) wrote: > Hello, I have a problem with php release 4.0.0 in that it segfaults whenever a client > connection is made. All components below are clean built with gcc. > > The details of my configuration are below - I am not sure if its exactly the same as BUG > 4558 but it looks like it. How can I debug the backtrace below further?? > > Has anyone come across this as well - or is it just me doing a dodgy installation?? > > many thanks, > > Roger Foskett > > > -------- VERSIONS INFO -------- > Linux 2.2.14-15mdk (mandrake) > Apache 1.3.12 (built as APXS - works fine with mod_perl) > php 4.0.0 (built as APXS) > > Related bug: 4558 (http://bugs.php.net/bugs.php?id=4558) > > -------- Error log message -------- > [Mon May 22 22:09:16 2000] [notice] child pid 2101 exit signal Segmentation > fault (11) > > -------- PHP CONFIG -------- > ./configure \ > --with-apxs=/usr/local/apache/bin/apxs \ > --with-config-file-path=/www/conf \ > --with-gd \ > --with-mysql > > (gd, zlib & mysql all installed ok) > -------- PHP INI -------- > standard php.ini (php.ini-dist) in /www/conf/ > > -------- APACHE CONFIG -------- > (largefile support required to stop mod_perl-1.23 segfaults - as perl is largefile enabled) > > CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" \ > ./configure \ > --sysconfdir=/www/conf \ > --logfiledir=/www/logs \ > --enable-module=most \ > --enable-shared=max \ > --enable-module=rewrite \ > --enable-shared=rewrite > > > -------- BACKTRACE -------- > (the seg fault was caused by telnetting into port 80 and typing > GET > - couldnt produce a core file) > > [root@mako bin]# gdb ./httpd > GNU gdb 19991116 > Copyright 1998 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you are > welcome to change it and/or distribute copies of it under certain conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for details. > This GDB was configured as "i586-mandrake-linux"... > (gdb) run -X -f /www/conf/httpd.conf -d /tmp > Starting program: /usr/local/apache/bin/./httpd -X -f /www/conf/httpd.conf -d /tmp > > Program received signal SIGSEGV, Segmentation fault. > 0x40560469 in ?? () from /usr/local/apache/libexec/libphp4.so > (gdb) bt > #0 0x40560469 in ?? () from /usr/local/apache/libexec/libphp4.so > #1 0x8054719 in ap_invoke_handler () > #2 0x8068c9f in process_request_internal () > #3 0x8069106 in ap_internal_redirect () > #4 0x401c6e7a in ?? () from /usr/local/apache/libexec/mod_cgi.so > #5 0x8054719 in ap_invoke_handler () > #6 0x8068c9f in process_request_internal () > #7 0x8068d0a in ap_process_request () > #8 0x805fea6 in child_main () > #9 0x8060061 in make_child () > #10 0x80601dc in startup_children () > #11 0x806083d in standalone_main () > #12 0x806106c in main () > #13 0x400c19ee in __libc_start_main (main=0x8060cd4 <main>, argc=6, argv=0xbffffa14, > init=0x804e830 <_init>, fini=0x80968c4 <_fini>, rtld_fini=0x4000a570 > <_dl_fini>, > stack_end=0xbffffa0c) at ../sysdeps/generic/libc-start.c:90 > -------------------------------------- >