[boost] boost::thread segfault

From: James Sutherland (James.Sutherland_at_[hidden])
Date: 2008-01-25 13:40:19

I am getting segmentation violations from inside of boost::thread

Running valgrind, I get the following:
> ==31129== Thread 2:
> ==31129== Jump to the invalid address stated on the next line
> ==31129==    at 0xEC834853E5894855: ???
> ==31129==    by 0x4A4DDE1: boost::function0<void,
> std::allocator<boost::function_base> >::function0(boost::function0<void,
> std::allocator<boost::function_base> > const&) (function_template.hpp:527)
> ==31129==    by 0x4A4CF21: thread_proxy (thread.cpp:106)
> ==31129==    by 0x31A0D06136: start_thread (in /lib64/tls/libpthread-2.3.4.so)
> ==31129==    by 0x31A04C7532: clone (in /lib64/tls/libc-2.3.4.so)
> ==31129==  Address 0xEC834853E5894855 is not stack'd, malloc'd or (recently)
> free'd
> ==31129== 
> ==31129== Process terminating with default action of signal 11 (SIGSEGV)
> ==31129==  Bad permissions for mapped region at address 0xEC834853E5894855
> ==31129==    at 0xEC834853E5894855: ???
> ==31129==    by 0x4A4DDE1: boost::function0<void,
> std::allocator<boost::function_base> >::function0(boost::function0<void,
> std::allocator<boost::function_base> > const&) (function_template.hpp:527)
> ==31129==    by 0x4A4CF21: thread_proxy (thread.cpp:106)
> ==31129==    by 0x31A0D06136: start_thread (in /lib64/tls/libpthread-2.3.4.so)
> ==31129==    by 0x31A04C7532: clone (in /lib64/tls/libc-2.3.4.so)

It seems that when the new thread is created.  Totalview shows that the
thread dies in function_template.hpp at the line:
> f.vtable->manager(f.functor, this->functor,
>                            boost::detail::function::clone_functor_tag)

Any thoughts on what could be causing this?  I am using boost_1_34_0.  I
don¹t know if this is relevant, but I have a thread adaptor class that looks
like:
>   class ThreadAdaptor
>   {
>   public:
>     ThreadAdaptor( ExpressionBase& expr ) : expr_(expr) {}
>     ThreadAdaptor(const ThreadAdaptor& ta) : expr_(ta.expr_) {}
>     ~ThreadAdaptor(){}
>     void operator()(){ expr_.evaluate(); }
>   private:
>     ThreadAdaptor& operator=(const ThreadAdaptor&); // no assignment
>     ExpressionBase& expr_;
>   };

Thanks for any advice,

James