--- shared_ptr.hpp.orig	2016-11-12 13:46:50.000000000 -0500
+++ shared_ptr.hpp	2018-12-19 10:33:00.022538689 -0500
@@ -53,6 +53,13 @@
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 #endif
 
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+void boost_debug_shared_ptr_operator_equals (void const *, void const *, int, void const*, int);
+void boost_debug_shared_ptr_reset (void const *, void const *, int, void const*, int);
+void boost_debug_shared_ptr_destructor (void const *, volatile void const *, int);
+void boost_debug_shared_ptr_constructor (void const *, volatile void const *, int);
+#endif
+
 namespace boost
 {
 
@@ -283,20 +290,29 @@
 {
     boost::detail::shared_count( p ).swap( pn );
     boost::detail::sp_enable_shared_from_this( ppx, p, p );
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+    boost_debug_shared_ptr_constructor (ppx, ppx->get(), ppx->use_count());
+#endif
 }
 
 #if !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
 
-template< class T, class Y > inline void sp_pointer_construct( boost::shared_ptr< T[] > * /*ppx*/, Y * p, boost::detail::shared_count & pn )
+template< class T, class Y > inline void sp_pointer_construct( boost::shared_ptr< T[] > * ppx, Y * p, boost::detail::shared_count & pn )
 {
     sp_assert_convertible< Y[], T[] >();
     boost::detail::shared_count( p, boost::checked_array_deleter< T >() ).swap( pn );
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+    /* no code for this yet - shared_ptr to array of T */
+#endif
 }
 
 template< class T, std::size_t N, class Y > inline void sp_pointer_construct( boost::shared_ptr< T[N] > * /*ppx*/, Y * p, boost::detail::shared_count & pn )
 {
     sp_assert_convertible< Y[N], T[N] >();
     boost::detail::shared_count( p, boost::checked_array_deleter< T >() ).swap( pn );
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+    /* no code for this yet - shared_ptr to array of T */
+#endif
 }
 
 #endif // !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
@@ -306,6 +322,9 @@
 template< class T, class Y > inline void sp_deleter_construct( boost::shared_ptr< T > * ppx, Y * p )
 {
     boost::detail::sp_enable_shared_from_this( ppx, p, p );
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+    boost_debug_shared_ptr_constructor (ppx, ppx->get(), ppx->use_count());
+#endif
 }
 
 #if !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
@@ -313,11 +332,17 @@
 template< class T, class Y > inline void sp_deleter_construct( boost::shared_ptr< T[] > * /*ppx*/, Y * /*p*/ )
 {
     sp_assert_convertible< Y[], T[] >();
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+    /* no code for this yet - shared_ptr to array of T */
+#endif
 }
 
 template< class T, std::size_t N, class Y > inline void sp_deleter_construct( boost::shared_ptr< T[N] > * /*ppx*/, Y * /*p*/ )
 {
     sp_assert_convertible< Y[N], T[N] >();
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+    /* no code for this yet - shared_ptr to array of T */
+#endif
 }
 
 #endif // !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
@@ -346,12 +371,20 @@
 
     shared_ptr() BOOST_NOEXCEPT : px( 0 ), pn() // never throws in 1.30+
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	/* default constructor case */
+	boost_debug_shared_ptr_constructor (this, px, use_count());
+#endif
     }
 
 #if !defined( BOOST_NO_CXX11_NULLPTR )
 
     shared_ptr( boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT : px( 0 ), pn() // never throws
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	/* explicit nullptr constructor case */
+	boost_debug_shared_ptr_constructor (this, px, use_count());
+#endif
     }
 
 #endif
@@ -392,11 +425,20 @@
 
     template<class D, class A> shared_ptr( boost::detail::sp_nullptr_t p, D d, A a ): px( p ), pn( p, d, a )
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_constructor (this, px, use_count());
+#endif
     }
 
 #endif
 
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+    ~shared_ptr() {
+	boost_debug_shared_ptr_destructor (this, get(), use_count());
+    }
+#else
 //  generated copy constructor, destructor are fine...
+#endif /* BOOST_SP_ENABLE_DEBUG_HOOKS */
 
 #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
 
@@ -404,6 +446,9 @@
 
     shared_ptr( shared_ptr const & r ) BOOST_NOEXCEPT : px( r.px ), pn( r.pn )
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_operator_equals (this, get(), use_count(), r.get(), r.use_count());
+#endif
     }
 
 #endif
@@ -413,6 +458,9 @@
     {
         boost::detail::sp_assert_convertible< Y, T >();
 
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_operator_equals (this, get(), use_count(), r.px, -1);
+#endif
         // it is now safe to copy r.px, as pn(r.pn) did not throw
         px = r.px;
     }
@@ -423,6 +471,9 @@
     {
         if( !pn.empty() )
         {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_operator_equals (this, get(), use_count(), r.px, -1);
+#endif
             px = r.px;
         }
     }
@@ -440,6 +491,9 @@
     BOOST_NOEXCEPT : px( r.px ), pn( r.pn )
     {
         boost::detail::sp_assert_convertible< Y, T >();
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_operator_equals (this, get(), use_count(), r.get(), r.use_count());
+#endif
     }
 
     // aliasing
@@ -532,6 +586,9 @@
     template<class Y>
     shared_ptr & operator=(shared_ptr<Y> const & r) BOOST_NOEXCEPT
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_operator_equals (this, get(), use_count(), r.get(), r.use_count());
+#endif
         this_type(r).swap(*this);
         return *this;
     }
@@ -543,6 +600,9 @@
     template<class Y>
     shared_ptr & operator=( std::auto_ptr<Y> & r )
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_operator_equals (this, get(), use_count(), r.get(), r.use_count());
+#endif
         this_type( r ).swap( *this );
         return *this;
     }
@@ -552,6 +612,9 @@
     template<class Y>
     shared_ptr & operator=( std::auto_ptr<Y> && r )
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_operator_equals (this, get(), use_count(), r.get(), r.use_count());
+#endif
         this_type( static_cast< std::auto_ptr<Y> && >( r ) ).swap( *this );
         return *this;
     }
@@ -574,6 +637,9 @@
     template<class Y, class D>
     shared_ptr & operator=( std::unique_ptr<Y, D> && r )
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_operator_equals (this, get(), use_count(), r.get(), r.use_count());
+#endif
         this_type( static_cast< std::unique_ptr<Y, D> && >( r ) ).swap(*this);
         return *this;
     }
@@ -607,6 +673,9 @@
 
     shared_ptr( shared_ptr && r ) BOOST_NOEXCEPT : px( r.px ), pn()
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_operator_equals (this, get(), use_count(), r.get(), r.use_count());
+#endif
         pn.swap( r.pn );
         r.px = 0;
     }
@@ -625,12 +694,18 @@
     {
         boost::detail::sp_assert_convertible< Y, T >();
 
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_operator_equals (this, get(), use_count(), r.get(), r.use_count());
+#endif
         pn.swap( r.pn );
         r.px = 0;
     }
 
     shared_ptr & operator=( shared_ptr && r ) BOOST_NOEXCEPT
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_operator_equals (this, get(), use_count(), r.get(), r.use_count());
+#endif
         this_type( static_cast< shared_ptr && >( r ) ).swap( *this );
         return *this;
     }
@@ -638,6 +713,9 @@
     template<class Y>
     shared_ptr & operator=( shared_ptr<Y> && r ) BOOST_NOEXCEPT
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_operator_equals (this, get(), use_count(), r.get(), r.use_count());
+#endif
         this_type( static_cast< shared_ptr<Y> && >( r ) ).swap( *this );
         return *this;
     }
@@ -656,6 +734,9 @@
 
     shared_ptr & operator=( boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT // never throws
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	    boost_debug_shared_ptr_operator_reset (this, get(), use_count(), 0, 0);
+#endif
         this_type().swap(*this);
         return *this;
     }
@@ -664,27 +745,42 @@
 
     void reset() BOOST_NOEXCEPT // never throws in 1.30+
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_reset (this, get(), use_count(), 0, 0);
+#endif
         this_type().swap(*this);
     }
 
     template<class Y> void reset( Y * p ) // Y must be complete
     {
         BOOST_ASSERT( p == 0 || p != px ); // catch self-reset errors
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_reset (this, get(), use_count(), p, 0);
+#endif
         this_type( p ).swap( *this );
     }
 
     template<class Y, class D> void reset( Y * p, D d )
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_reset (this, get(), use_count(), p, 0);
+#endif
         this_type( p, d ).swap( *this );
     }
 
     template<class Y, class D, class A> void reset( Y * p, D d, A a )
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	boost_debug_shared_ptr_reset (this, get(), use_count(), p, 0);
+#endif
         this_type( p, d, a ).swap( *this );
     }
 
     template<class Y> void reset( shared_ptr<Y> const & r, element_type * p )
     {
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+	    boost_debug_shared_ptr_reset (this, get(), use_count(), p, 0);
+#endif
         this_type( r, p ).swap( *this );
     }