Bump, adding some backtraces: Dump 1: #0 _X11TransWritev (ciptr=0x0, buf=0x2000000001b96720, size=1) at ../../lib/xtrans/Xtrans.c:911 #1 0x2000000000093910 in _XSendClientPrefix (dpy=<value optimized out>, client=<value optimized out>, auth_proto=0x0, auth_string=0x0, prefix=0x2000000001b96784) at ConnDis.c:572 #2 0x20000000000c4640 in XOpenDisplay (display=<value optimized out>) at OpenDis.c:295 #3 0x4000000000001580 in ThreadMain_OpenDisplayAndStartTest (num=0x1) at ../../thread.cpp:37 #4 0x200000000027d5d0 in start_thread () from /lib/libpthread.so.0 #5 0x20000000007cb730 in __clone2 () from /lib/libc.so.6.1 Dump 2: #0 0x200000000070f350 in malloc_consolidate () from /lib/libc.so.6.1 #1 0x2000000000714830 in _int_malloc () from /lib/libc.so.6.1 #2 0x2000000000716ef0 in calloc () from /lib/libc.so.6.1 #3 0x20000000000c4530 in XOpenDisplay (display=<value optimized out>) at OpenDis.c:262 #4 0x4000000000001580 in ThreadMain_OpenDisplayAndStartTest (num=0x2) at ../../thread.cpp:37 #5 0x200000000027d050 in start_thread () from /lib/libpthread.so.0 #6 0x20000000007cb730 in __clone2 () from /lib/libc.so.6.1
i explored this topic for quite a while, when i debug it i see memory corruptions every time it crashes. memory corruptions doesn't always occur at the same place which makes it even harder and more confusing. i am currently trying to build the debug version with dmalloc to see it it might find some memory over runs and so forth. ________________________________________________________________ Machine spec: IA64 /SUSE Linux Enterprise Server/ 10 sp 2 xorg x11 6.9.0-50.58 I have a very simple test program that opens 4 threads and does XOpenDisplay(opening 4 separate display objects). i keep getting segfaults on different places in the function seems like some kind timing problem that causes memory corruption. before i start giving backtraces here any one seen this problem before? I can re-produce when working on X in debug, but couldn't re-produce it when used Electric Fence Malloc Debugger with my program (wanted to see if memory check can find any overruns) _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
