On Fri, 2015-08-07 at 10:36 -0400, Rich Prohaska wrote: > Hello, > > I have observed that helgrind will report erroneous data races on a > variable if checking on that variable is disable and enabled by a > concurrent thread. Can someone explain what is going on? VALGRIND_HG_ENABLE_CHECKING implementation consists in declaring that the address range is 'new' and belongs (exclusively) to this thread. In other words, calling VALGRIND_HG_ENABLE_CHECKING is like if the memory was just allocated.
So, using that definition, it is normal that helgrind reports a race, because there is no synchronisation between the thread that 'allocated freshly' count, and the thread that does a write to count. Philippe ------------------------------------------------------------------------------ _______________________________________________ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
