Re: [PHP4BETA] Segfault with large Apache

On Mon, Jan 03, 2000 at 11:05:51PM -0500, Dark Helmet wrote: > > I'm trying to get up a development server at work with all sorts of > general goodies, since most of our web stuff is all over the place. I got > Apache 1.3.9 and mod_ssl 2.4.9 (openssl 0.9.4), compiled in as DSO's. > > I added in mod_perl 1.21 just fine as a DSO, and it works great. > > It's a fairly beefy server, and we have Postgres, Mysql, Oracle 8i, and > DB2 all installed (all latest versions). The configure script run for php4 > was: > > ./configure --enable-track-vars \ > --enable-bcmath \ > --enable-debugger \ > --with-mysql=/usr/local/mysql \ > --with-pgsql=/usr/local/pgsql \ > --with-ibm-db2=/usr/local/db2/V6.1 \ > --with-oracle=/usr/local/oracle-8i/product/8.1.5 \ > --with-zlib \ > --with-java=/usr/local/jdk-1.1.8-blackdown/ \ > --with-ttf \ > --with-gd \ > --with-ftp \ > --with-apxs=/usr/local/apache/bin/apxs > > I did notice that it apparently failed on the db2 support, the > compiliation was missing the -L/usr/local/db2/V6.1/lib. A touchup on the > Makefile and it went through fine. > > When Apache restarts, it forks and segfaults. strace goes through all the > loading of the php4 modules and the database libs, then loads ssl, and I > can see it read the next line of httpd.conf, where it apparently segfaults > for no reason. Here's the last few lines of strace: > > 32454 open("/usr/local/apache/libexec/libssl.so", O_RDONLY) = 5 > 32454 fstat(5, {st_mode=S_IFREG|0755, st_size=924730, ...}) = 0 > 32454 read(5, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0 > u\2\000"..., 4096) = 4096 > 32454 mmap(NULL, 800912, PROT_READ|PROT_EXEC, MAP_PRIVATE, 5, 0) = > 0x4119c000 > 32454 mprotect(0x41250000, 63632, PROT_NONE) = 0 > 32454 mmap(0x41250000, 49152, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, > 5, 0xb3000) = 0x > 41250000 > 32454 mmap(0x4125c000, 14480, PROT_READ|PROT_WRITE, > MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1 > , 0) = 0x4125c000 > 32454 close(5) = 0 > 32454 mprotect(0x4119c000, 737280, PROT_READ|PROT_WRITE) = 0 > 32454 mprotect(0x4119c000, 737280, PROT_READ|PROT_EXEC) = 0 > 32454 read(4, "as.\n# . On SCO (ODT 3) use \"Use"..., 4096) = 4096 > 32454 --- SIGSEGV (Segmentation fault) --- > > gdb doesn't help much, it keeps saying the program exits normally. The > thing that bugs me it the reading of the next line, which seems fine. I'm > thoroughly stumped on this one. To get a useful backtrace, run $ gdb bin/httpd ... (gdb) r -X ... (gdb) bt -- Regards, Sascha Schumann Consultant