Hi Kienan, On Thu, Jul 11, 2024 at 8:38 AM Kienan Stewart <kstew...@efficios.com> wrote:
> Hi Brian, > > On 7/11/24 8:33 AM, Brian Hutchinson via lttng-dev wrote: > > ... > > > > I'm not sure about this, still trying to comprehend everything, but I > > think my issue could be related to all this gcc TLS, heap, trampoline > > talk here: > > > > https://www.mail-archive.com/lttng-dev@lists.lttng.org/msg13584.html > > <https://www.mail-archive.com/lttng-dev@lists.lttng.org/msg13584.html> > > > > Regards, > > > > Brian > > > > You could try using lttng-ust 2.13.8, which includes a fix for the > discussion you referenced. > > > https://github.com/lttng/lttng-ust/commit/5db715e800d9b721f48495a987cd26c25965e836 > > Please let us know if it doesn't solve it. > > thanks, > kienan > I updated to lttng-ust 2.13.8 as you suggested. At first, I pulled in the recipe from master branch of Yocto, but had the same problem as before after rebuilding. Next, I downloaded the 2.13.8 lttng-ust tarball from the lttng site and setup a native build environment on my target and built lttng-ust 2.13.8 and my app as a second independent build method for sanity check. I can report that I get the exact same result as before this way too. In both cases, I verified that I had the commit you referenced above. I did a backtrace of the three threads captured in the coredump and show them below in hopes it will shed light on what I need to try next. (gdb) thread apply all backtrace Thread 3 (Thread 0xffffbe7de7e0 (LWP 559)): #0 syscall () at ../sysdeps/unix/sysv/linux/aarch64/syscall.S:38 #1 0x0000ffffbeef1bb8 in lttng_ust_futex (val3=0, uaddr2=0x0, timeout=0x0, val=0, op=0, uaddr=0xffffbefd8000) at ../../../src/lib/lttng-ust/futex.h:56 #2 lttng_ust_futex_async (op=0, val=0, timeout=0x0, uaddr2=0x0, val3=0, uaddr=0xffffbefd8000) at ../../../src/lib/lttng-ust/futex.h:88 #3 wait_for_sessiond (sock_info=0xffffbef6b638 <global_apps>) at lttng-ust-comm.c:1761 #4 ust_listener_thread (arg=0xffffbef6b638 <global_apps>) at lttng-ust-comm.c:1832 #5 0x0000ffffbe9206a8 in start_thread (arg=0xffffc1bd8687) at pthread_create.c:442 #6 0x0000ffffbe98801c in thread_start () at ../sysdeps/unix/sysv/linux/aarch64/clone.S:79 Thread 2 (Thread 0xffffbdfce7e0 (LWP 560)): #0 syscall () at ../sysdeps/unix/sysv/linux/aarch64/syscall.S:38 #1 0x0000ffffbeef1bb8 in lttng_ust_futex (val3=0, uaddr2=0x0, timeout=0x0, val=0, op=0, uaddr=0xffffbefd7000) at ../../../src/lib/lttng-ust/futex.h:56 #2 lttng_ust_futex_async (op=0, val=0, timeout=0x0, uaddr2=0x0, val3=0, uaddr=0xffffbefd7000) at ../../../src/lib/lttng-ust/futex.h:88 #3 wait_for_sessiond (sock_info=0xffffbef695e0 <local_apps>) at lttng-ust-comm.c:1761 #4 ust_listener_thread (arg=0xffffbef695e0 <local_apps>) at lttng-ust-comm.c:1832 #5 0x0000ffffbe9206a8 in start_thread (arg=0xffffc1bd8687) at pthread_create.c:442 #6 0x0000ffffbe98801c in thread_start () at ../sysdeps/unix/sysv/linux/aarch64/clone.S:79 Thread 1 (Thread 0xffffbefcf460 (LWP 545)): #0 __strlen_asimd () at ../sysdeps/aarch64/multiarch/strlen_asimd.S:96 #1 0x0000ffffbe834bd0 in lttng_ust_tp_validate_event_name (tp=0xaaaab8f14de0 <lttng_ust_tracepoint_hello_world___my_first_tracepoint>, tp=0xaaaab8f14de0 <lttng_ust_tracepoint_hello_world___my_first_tracepoint>) at tracepoint.c:143 #2 add_callsite (tp=0xaaaab8f14de0 <lttng_ust_tracepoint_hello_world___my_first_tracepoint>, lib=0xaaaae74fad30) at tracepoint.c:412 #3 lib_register_callsites (lib=0xaaaae74fad30) at tracepoint.c:552 #4 lttng_ust_tracepoint_module_register (tracepoints_start=<optimized out>, tracepoints_count=<optimized out>) at tracepoint.c:956 #5 0x0000aaaab8758204 in lttng_ust.tracepoints.ptrs_init () #6 0x0000ffffbe8cb30c in call_init (env=<optimized out>, argv=0xffffc1bd8c88, argc=1) at ../csu/libc-start.c:145 #7 __libc_start_main_impl (main=0xaaaab867aabc <main>, argc=1, argv=0xffffc1bd8c88, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=<optimized out>) at ../csu/libc-start.c:376 #8 0x0000aaaab867a7f0 in _start () at ../sysdeps/aarch64/start.S:81 Regards, Brian
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