On Thu, Sep 12, 2002 at 12:45:36AM -0400, Mike Furr wrote: > [please CC, as I'm not on the list] > > I believe there is a problem in the dlopen function in sid's > libc6(2.2.5-14.1) on ppc. Unfortuanately I just started playing around > with the program on this arch, so I don't know if the bugs been around > for a while, or arose in the recent nmu'd version of libc6. > > I'm working on packaging a program that dlopen's a bunch of plugins. > The code used to call this is: > fprintf(stderr, "dlopening: %s\n", path); > if(!plugin_fd) plugin_fd = dlopen(path, RTLD_NOW); > fprintf(stderr,"returned\n"); > > but sadly the dlopen call never returns:
Well, that's not the right behavior probably. We'd need more information. But it looks to me from the GDB trace as if you're dlopening a library which is linked to libpthread, and your main application is not. I can assure you that that isn't going to work properly. If you want to support threaded plugins the app must be threaded. > [...] > dlopening: /usr/lib/cinelerra/crossfade.plugin > returned > dlopening: /usr/lib/cinelerra/defaulttheme.plugin > returned > dlopening: /usr/lib/cinelerra/deinterlace.plugin > [New Thread 1024 (LWP 11856)] > > Program received signal SIGSEGV, Segmentation fault. > [Switching to Thread 1024 (LWP 11856)] > 0x30011f84 in stpcpy () from /lib/ld.so.1 > (gdb) bt > #0 0x30011f84 in stpcpy () from /lib/ld.so.1 > #1 0x3001092c in dl_reloc_overflow () from /lib/ld.so.1 > #2 0x30010c08 in __process_machine_rela () from /lib/ld.so.1 > #3 0x3000a644 in _dl_relocate_object () from /lib/ld.so.1 > #4 0x0f86bd58 in getutmpx () from /lib/libc.so.6 > #5 0x3000bf20 in _dl_catch_error () from /lib/ld.so.1 > #6 0x0f86c000 in _dl_open () from /lib/libc.so.6 > #7 0x0f9c5070 in _SDA_BASE_ () from /lib/libdl.so.2 > (gdb) > > The plugin is the 13th to be loaded. The first twelve seem to load fine > and the 13th fails every time. Everything works fine when I run it on > my i686. The ppc machine is a 800Mhz TiBook using the standard > gcc(2.95.4). > Let me know if I can provide any further details, or if you want me to > open a bug report for tracking purposes. > > -m -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
