Hi, I'm running Zynq ZC706 board with Xenomai 2.6.4 on a pre/post patched 3.14.17 kernel from the Xilinx fork. Everything was built using gcc 4.9.1
I'm hitting a segfault and the core dumps are corrupted with no useful information. As a last resort, I'm trying to use the gcc version of AddressSanitizer (https://github.com/google/sanitizers/wiki/AddressSanitizer). We've used ASan successfully on the same codebase but on x86_64 using a hardware simulation library that doesn't have real-time requirements. Unfortunately, this bug doesn't show up in the simulation. I tried a simple "hello world" program with a memory bug that generates the desired report with ASan alone. When I include Xenomai, the app crashes before getting to main(): Program received signal SIGSEGV, Segmentation fault. 0x00000000 in ?? () (gdb) bt #0 0x00000000 in ?? () #1 0xb6b482cc in __interceptor_pthread_cond_signal (Cannot access memory at address 0x0 c=0x4e9dd2f8) at ../../../../../../../../../work-shared/gcc-4.9.1-r0/gcc-4.9.1/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:2268 #2 0x4e9d2cf8 in ?? () from /usr/lib/libxenomai.so.0 Cannot access memory at address 0x0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) I think the pthread_cond_signal call occurs in the rt_print init. This sanitizer issue may be related: https://github.com/google/sanitizers/issues/297. I'm not sure why the problem occurs when Xenomai is linked but not when it isn't. My LDFLAGS are: -lasan -lpthread -lrt -Wl,@/mnt/data/poky/1.7.1/sysroots/armv7a-vfp-neon-poky-linux-gnueabi/usr/lib/posix.wrappers -L/mnt/data/poky/1.7.1/sysroots/armv7a-vfp-neon-poky-linux-gnueabi/usr/lib -lpthread_rt -lxenomai -lpthread -lrt Has anyone used Xenomai and ASan together successfully? What steps did you have to take? Or is it a terrible idea? I know this might be more of an ASan issue but figured it's more likely Xenomai people are familiar with ASan than vice versa. I'll try them as well. Thanks, Jeff _______________________________________________ Xenomai mailing list [email protected] https://xenomai.org/mailman/listinfo/xenomai
