Hello,
I’m trying to use helgrind to debug thread race conditions in our software.
We’re using std::thread(), std::atomic() and conditional variables.
Currently, I’m facing the following difficulties:
* Std::thread() work fairly ok using
http://www.valgrind.org/docs/manual/drd-manual.html#drd-manual.C++11
* Std::thread() doen’t show thread names in valgrind output when being set by
pthread_setname_np(handle, threadName.c_str());
Thread names are seen in gdb-debugger though
* Using the Client-request interface by
ANNOTATE_THREAD_NAME(threadName_.c_str());
std::thread::id tid=thread_.get_id();
unsigned Valgrindid = DRD_GET_VALGRIND_THREADID;
unsigned Helgrindid = DRD_GET_DRD_THREADID;
std::cout << "ID: " << tid << " Valgrind_ID: " << Valgrindid << "
Helgrind_ID: " << Helgrindid << " WT-Name: "<< threadName_ << std::endl;
Doesn't print out good stuff. It prints the system-Thread ID, but Valgrind
and Helgrind IDs are 0. ThreadName_ is the correct user defined name.
* std::atomic() are treated as racy
* conditional variables are treated as racy
* std::future is racy ?
I'm calling the program via
valgrind \
--tool=helgrind \
--log-socket=172.17.17.1 \
-v \
./Application.elf
==1614== ---Thread-Announcement------------------------------------------
==1614==
==1614== Thread #21 was created
==1614== at 0x4E016F6: clone (clone.S:56)
==1614== by 0x486B9FB: create_thread (createthread.c:100)
==1614== by 0x486D4E7: pthread_create@@GLIBC_2.4 (pthread_create.c:822)
==1614== by 0x484E9F3: ??? (in
/usr/lib/valgrind/vgpreload_helgrind-arm-linux.so)
==1614==
[...]
==1614== Lock at 0x7D9D47BC was first observed
==1614== at 0x484C6B0: ??? (in
/usr/lib/valgrind/vgpreload_helgrind-arm-linux.so)
==1614== Address 0x7d9d47bc is on thread #1's stack
==1614==
==1614== Lock at 0x4EAD5E4 was first observed
==1614== at 0x484C6B0: ??? (in
/usr/lib/valgrind/vgpreload_helgrind-arm-linux.so)
==1614== Address 0x4ead5e4 is 244 bytes inside a block of size 328 alloc'd
==1614== at 0x4849368: operator new(unsigned int) (in
/usr/lib/valgrind/vgpreload_helgrind-arm-linux.so)
==1614== Block was alloc'd by thread #1
==1614==
==1614== Possible data race during read of size 4 at 0x4EB3968 by thread #1
==1614== Locks held: 1, at address 0x7D9D47BC
==1614== at 0x17186C: _M_ptr (unique_ptr.h:147)
==1614== by 0x17186C: get (unique_ptr.h:337)
==1614== by 0x17186C: operator* (unique_ptr.h:323)
==1614== by 0x17186C: wait (future:338)
==1614== by 0x17186C: _M_get_result (future:717)
==1614== by 0x17186C: get (future:796)
Is there any help to get this working?
Thanks,
Mario
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