Hi, I was trying to use the DRD tool on one of our instrumented application (tracing via lttng) and I get an assertion [4] similar to the one from this post [1]. Just like Joe VanAdel I'm wondering whether the problem is on our side (lttng) or DRD.
The lttng-ust lib essentially get preloaded and create a thread during it's initialization. You can find the relevant code for lttng-ust here [3]. A way to reproduce this is to install lttng-ust [3] and use drd on the example under lttng-ust/doc/examples/easy-ust/ Let me know if you need any additional information. Thanks [1] http://thread.gmane.org/gmane.comp.debugging.valgrind/13995/focus=13996 [2] https://github.com/lttng/lttng-ust It require liburcu: https://github.com/urcu/userspace-rcu [3] The init function : https://github.com/lttng/lttng-ust/blob/master/liblttng-ust/lttng-ust-comm.c#L1483 The actual call to pthread_create: https://github.com/lttng/lttng-ust/blob/master/liblttng-ust/lttng-ust-comm.c#L1560 [4] ==16669== drd, a thread error detector ==16669== Copyright (C) 2006-2015, and GNU GPL'd, by Bart Van Assche. ==16669== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright info ==16669== Command: ./sample ==16669== --16669-- WARNING: unhandled amd64-linux syscall: 324 --16669-- You may be able to write your own handler. --16669-- Read the file README_MISSING_SYSCALL_OR_IOCTL. --16669-- Nevertheless we consider this a bug. Please report --16669-- it at http://valgrind.org/support/bug_reports.html. drd: drd_thread.c:657 (vgDrd_thread_entering_pthread_create): Assertion 'DRD_(g_threadinfo)[tid].pt_threadid != INVALID_POSIX_THREADID' failed. host stacktrace: ==16669== at 0x380256C8: show_sched_status_wrk (m_libcassert.c:343) ==16669== by 0x380257D4: report_and_quit (m_libcassert.c:415) ==16669== by 0x38025961: vgPlain_assert_fail (m_libcassert.c:481) ==16669== by 0x38014E36: vgDrd_thread_entering_pthread_create (drd_thread.c:657) ==16669== by 0x3800944B: handle_client_request (drd_clientreq.c:296) ==16669== by 0x3803D040: wrap_tool_handle_client_request (m_tooliface.c:280) ==16669== by 0x3807526F: do_client_request (scheduler.c:2101) ==16669== by 0x3807526F: vgPlain_scheduler (scheduler.c:1425) ==16669== by 0x380839EA: thread_wrapper (syswrap-linux.c:102) ==16669== by 0x380839EA: run_a_thread_NORETURN (syswrap-linux.c:155) sched status: running_tid=1 Thread 1: status = VgTs_Runnable (lwpid 16669) ==16669== at 0x4C3167B: vgDrd_entering_pthread_create (drd_pthread_intercepts.c:441) ==16669== by 0x4C3167B: pthread_create_intercept (drd_pthread_intercepts.c:594) ==16669== by 0x4C3167B: pthread_create@* (drd_pthread_intercepts.c:611) ==16669== by 0x50696BD: lttng_ust_init (lttng-ust-comm.c:1560) ==16669== by 0x4010139: call_init.part.0 (dl-init.c:78) ==16669== by 0x4010222: call_init (dl-init.c:36) ==16669== by 0x4010222: _dl_init (dl-init.c:126) ==16669== by 0x4001309: ??? (in /lib/x86_64-linux-gnu/ld-2.19.so) -- Jonathan R. Julien Efficios -- Jonathan R. Julien Efficios ------------------------------------------------------------------------------ Go from Idea to Many App Stores Faster with Intel(R) XDK Give your users amazing mobile app experiences with Intel(R) XDK. Use one codebase in this all-in-one HTML5 development environment. Design, debug & build mobile apps & 2D/3D high-impact games for multiple OSs. http://pubads.g.doubleclick.net/gampad/clk?id=254741911&iu=/4140 _______________________________________________ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
