On Thu, 12 Jan 2012 03:13:38 -0800 (PST), Vicente Botet wrote:
Frederick Roth wrote
On Thu, 05 Jan 2012 09:04:46 +0100, Frederick Roth wrote:
On Wed, 04 Jan 2012 22:01:01 +0100, Vicente J. Botet Escriba wrote:
Le 04/01/12 09:46, Frederick Roth a écrit :
I am currently fooling around with boost::thread. After writing a short example program (featuring boost::thread and boost::interprocess::interprocess_semaphore), I ran helgrind against it and got some "Possible data race" errors.
Hi, I missed you last post.
Anyway, the trace "Possible data race during read of size 4 at 0x46c6d32c by thread #3" doesn't help me too much. Is there any way helring can give the c++ variable names?
I got it to show the line-numbers in the boost library (once.hpp and once.cpp) i give you the output below. I hope it helps. ==11280== Possible data race during read of size 4 at 0x403c1ec by thread #3 ==11280== at 0x402E873: _ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_.constprop.111 (once.hpp:50) ==11280== by 0x48D8DCD2: start_thread (in /lib/libpthread-2.14.90.so) ==11280== by 0x48C9E83D: clone (in /lib/libc-2.14.90.so) ==11280== This conflicts with a previous write of size 4 by thread #2 ==11280== at 0x402E981: _ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_.constprop.111 (once.hpp:77) ==11280== by 0x402EB84: boost::detail::set_current_thread_data(boost::detail::thread_data_base*) (thread.cpp:105) ==11280== by 0x48D8DCD2: start_thread (in /lib/libpthread-2.14.90.so) ==11280== by 0x48C9E83D: clone (in /lib/libc-2.14.90.so) ==11280== ==11280== Possible data race during read of size 4 at 0x403c1e8 by thread #3 ==11280== at 0x402E879: _ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_.constprop.111 (once.hpp:50) ==11280== by 0x48D8DCD2: start_thread (in /lib/libpthread-2.14.90.so) ==11280== by 0x48C9E83D: clone (in /lib/libc-2.14.90.so) ==11280== This conflicts with a previous write of size 4 by thread #2 ==11280== at 0x402E96C: _ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_.constprop.111 (once.hpp:77) ==11280== by 0x402EB84: boost::detail::set_current_thread_data(boost::detail::thread_data_base*) (thread.cpp:105) ==11280== by 0x48D8DCD2: start_thread (in /lib/libpthread-2.14.90.so) ==11280== by 0x48C9E83D: clone (in /lib/libc-2.14.90.so) ==11280== ==11280== Possible data race during read of size 4 at 0x403c24c by thread #3 ==11280== at 0x4036AAF: boost::detail::get_once_per_thread_epoch() (once.cpp:42) ==11280== by 0x48D8DCD2: start_thread (in /lib/libpthread-2.14.90.so) ==11280== by 0x48C9E83D: clone (in /lib/libc-2.14.90.so) ==11280== This conflicts with a previous write of size 4 by thread #2 ==11280== at 0x48D926F9: pthread_key_create (in /lib/libpthread-2.14.90.so) ==11280== by 0x48D8DCD2: start_thread (in /lib/libpthread-2.14.90.so) ==11280== by 0x48C9E83D: clone (in /lib/libc-2.14.90.so)