src/hotspot/share/code/codeHeapState.cpp

rev 51532 : 8209950: SIGBUS in CodeHeapState::print_names()
Reviewed-by:

*** 2166,2178 ****
          ast->print("(+" PTR32_FORMAT ")", (unsigned int)((char*)this_blob-low_bound));
          ast->fill_to(33);
  
          // this_blob->as_nmethod_or_null() is safe. Inlined, maybe invisible on stack.
          nmethod*    nm     = this_blob->as_nmethod_or_null();
!         Method*     method = (nm == NULL) ? NULL : nm->method();  // may be uninitialized, i.e. != NULL, but invalid
!         if ((nm != NULL) && (method != NULL) && (cbType != nMethod_dead) && (cbType != nMethod_inconstruction) &&
!             os::is_readable_pointer(method) && os::is_readable_pointer(method->constants())) {
            ResourceMark rm;
            //---<  collect all data to locals as quickly as possible  >---
            unsigned int total_size = nm->total_size();
            int          hotness    = nm->hotness_counter();
            bool         get_name   = (cbType == nMethod_inuse) || (cbType == nMethod_notused);
--- 2166,2178 ----
          ast->print("(+" PTR32_FORMAT ")", (unsigned int)((char*)this_blob-low_bound));
          ast->fill_to(33);
  
          // this_blob->as_nmethod_or_null() is safe. Inlined, maybe invisible on stack.
          nmethod*    nm     = this_blob->as_nmethod_or_null();
!         Method*     method = (nm == NULL) ? NULL : nm->method();  // nm->method() may be uninitialized, i.e. != NULL, but invalid
!         if ((nm != NULL) && (method != NULL) && (method->signature() != NULL) && (cbType != nMethod_dead) && (cbType != nMethod_inconstruction) &&
!             os::is_readable_pointer(method) && os::is_readable_pointer(method->constants()) && os::is_readable_pointer(method->signature())) {
            ResourceMark rm;
            //---<  collect all data to locals as quickly as possible  >---
            unsigned int total_size = nm->total_size();
            int          hotness    = nm->hotness_counter();
            bool         get_name   = (cbType == nMethod_inuse) || (cbType == nMethod_notused);