Hi Jeff, Apache segfaults right way on the first attempt to connect to the database.
Note that the oracle library works correctly from /usr/bin/perl - the fault occurs only when run within Apache. Also, a coworker has verified that, on Fedora Core 6, this fault does not occur, even within Apache. I agree that it is strange for this library to call _dl_make_stack_executable, and i don't think that it does. objdump --dynamic-syms on the oracle library does not show any reference to _make_stack_executable. So it could be that the stack trace we see has been corrupted. I don't know what sort of stack frame magic ld-linux may employ, or if gdb can interpret a 'trampoline' correctly, so i'm uncertain on this point. I thought that ld-linux.so may have thought it necessary to make this call. Apache originally had the elf header $readelf -l /usr/sbin/apache | grep STACK GNU_STACK 0x000000 0x00000000 0x00000000 0x00000 0x00000 RW 0x4 whereas libclntsh.so lacks the GNU_STACK header. So, that seemed like a reason why ld-linux might call _dl_make_stack_executable. However, editing /usr/sbin/apache to change the GNU_STACK permissions to RWE, so that the stack would be executable from the start, did not change the fault. My Ubuntu system's glibc was built on 2006-10-10: $ /lib/libc-2.4.so ... Compiled on a Linux 2.6.17-10 system on 2006-10-10. As this is not the most recent build, I will try to update to the January build to see if the fault is still present. -SEan On Jan 24, 2007, at 6:38 AM, Jeff Bailey wrote: > It's hard to tell without the code in hand, but my best guess is that > the oracle library is handing in a bad pointer to some function. > > I'm a bit surprised to see a call right from kpummfpg into > _dl_make_stack_executable. Does it segfault reasonably quickly, or > does > it have to run for a while? > > -- > ld-linux.so.2 segfaults in _dl_make_stack_executable > https://launchpad.net/bugs/81232 -- ld-linux.so.2 segfaults in _dl_make_stack_executable https://launchpad.net/bugs/81232 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
