[Boost-users] boost:shared_ptr destructor, SIGBUS, MIPS 64

Subject: [Boost-users] boost:shared_ptr destructor, SIGBUS, MIPS 64
From: sumanth krishna (sumanth987_at_[hidden])
Date: 2012-01-03 13:04:09

I am using a STL list of boost shared pointer in my code and and it
randomly dumps core. Below is the code snippet and the core stack.

class A ()

{

    virtual ~A();

    string getsomestring();

}

class B: public A

{

}

typedef shared_ptr<A> A_ptr;

class C // singelton class

{

public:

getList(list <A_ptr>& temp_list)

{

    list<A_ptr>::iterator itr = _inv.begin();

    for( ; itr != _inv.end(); itr++ ) {

        temp_list.push_back( (*itr) );

}

getListContent ( list<string>& str_list)

{

    list<A_ptr>::iterator itr = _inv.begin();

    for( ; itr != _inv.end(); itr++ ) {

        str_list.push_back( (*itr)->getsomestring() );

    }

}

private:

list <A_ptr> _inv;

}

main()

{

C *c= new C; // create an instance ( its a singleton class)

// On creating an instance of C, the private member variable inventory is
populated.

// inventory.push_back(A_ptr(new FRU ( fvar )))

thread 1 {

list<A_ptr> var1;

c->getList(var1);

list <string> var2;

c->getListContent(var2);

}  // End of thread

delete c;

}  // end of main

Now this code works fine for some iterations and then dumps core with the
following stack

######################

Thread 1 (Thread 0x55567f7af0 (LWP 23773)):

#0  0x0000000120038ecc in boost::detail::atomic_decrement (pw=0xa)

sysroot/usr/include/boost/smart_ptr/detail/sp_counted_base_gcc_mips.hpp:66

#1  0x0000000120038f44 in boost::detail::sp_counted_base::release (this=0x2)

#2  0x00000001200390ac in boost::detail::shared_count::~shared_count
(this=0x1200b08d8, __in_chrg=<value optimized out>)

#3  0x000000012003eaf4 in boost::shared_ptr<A>::~shared_ptr
(this=0x1200b08d0, __in_chrg=<value optimized out>)

#4  0x000000012003eb4c in __gnu_cxx::new_allocator<boost::shared_ptr<A>
>::destroy (this=0xffffeaf640, __p=0x1200b08d0)

#5  0x000000012003c9e0 in std::_List_base<boost::shared_ptr<A>,
std::allocator<boost::shared_ptr<A> > >::_M_clear (this=0x1200a8ee8)

#6  0x000000012003b4ac in std::_List_base<boost::shared_ptr<A>,
std::allocator<boost::shared_ptr<A> > >::~_List_base (this=0x1200a8ee8,
__in_chrg=<value optimized out>)

#7  0x000000012003a0e8 in std::list<boost::shared_ptr<A>,
std::allocator<boost::shared_ptr<A> > >::~list (this=0x1200a8ee8,
__in_chrg=<value optimized out>)

#8  0x0000000120068b64 in C::~C (this=0x1200a8e70, __in_chrg=<value
optimized out>)

######################################################

This code is cross compiled for MIPS64 arch on linux x86_64 machine and is
running on a 64 bit MIPS machine. I am not sure why it is dumping core. It
dumps core giving a *SIGBUS* error. Do i have to specifically handle the
delete operation of the List ? I am using the default destructor for "C"
class and there is no pointers in the class A and Class A also doesnt have
anything in its destructor, no memory allocations are done in Class A. Any
suggestions regarding this problem would be highly helpful.