245 // Returns "TRUE" if "p" is a method oop in the

   246 // current heap with high probability. NOTE: The main

   247 // current consumers of this interface are Forte::

   248 // and ThreadProfiler::. In these cases, the

   249 // interpreter frame from which "p" came, may be

   250 // under construction when sampled asynchronously, so

   251 // the clients want to check that it represents a

   252 // valid method before using it. Nonetheless since

   253 // the clients do not typically lock out GC, the

   254 // predicate is_valid_method() is not stable, so

   255 // it is possible that by the time "p" is used, it

   256 // is no longer valid.

   257 inline bool CollectedHeap::is_valid_method(Method* p) const {

   258   return

   259     p != NULL &&

   260 

   261     // Check whether "method" is metadata

   262     p->is_metadata() &&

   263 

   264     // See if GC is active; however, there is still an

   265     // apparently unavoidable window after this call

   266     // and before the client of this interface uses "p".

   267     // If the client chooses not to lock out GC, then

   268     // it's a risk the client must accept.

   269     !is_gc_active() &&

   270 

   271     // Check that p is a Method*.

   272     p->is_method();

   273 }

   274