222       VMThread::execute(&op);
 223     } else if (DeoptimizeRandom && (value & 0x1F) == (os::random() & 0x1F)) {
 224       VM_DeoptimizeAll op;
 225       VMThread::execute(&op);
 226     }
 227   }
 228   deoptimizeAllCounter++;
 229 }
 230 
 231 
 232 void InterfaceSupport::stress_derived_pointers() {
 233 #ifdef COMPILER2
 234   JavaThread *thread = JavaThread::current();
 235   if (!is_init_completed()) return;
 236   ResourceMark rm(thread);
 237   bool found = false;
 238   for (StackFrameStream sfs(thread); !sfs.is_done() && !found; sfs.next()) {
 239     CodeBlob* cb = sfs.current()->cb();
 240     if (cb != NULL && cb->oop_maps() ) {
 241       // Find oopmap for current method
 242       OopMap* map = cb->oop_map_for_return_address(sfs.current()->pc());
 243       assert(map != NULL, "no oopmap found for pc");
 244       found = map->has_derived_pointer();
 245     }
 246   }
 247   if (found) {
 248     // $$$ Not sure what to do here.
 249     /*
 250     Scavenge::invoke(0);
 251     */
 252   }
 253 #endif
 254 }
 255 
 256 
 257 void InterfaceSupport::verify_stack() {
 258   JavaThread* thread = JavaThread::current();
 259   ResourceMark rm(thread);
 260   // disabled because it throws warnings that oop maps should only be accessed
 261   // in VM thread or during debugging
 262 

 222       VMThread::execute(&op);
 223     } else if (DeoptimizeRandom && (value & 0x1F) == (os::random() & 0x1F)) {
 224       VM_DeoptimizeAll op;
 225       VMThread::execute(&op);
 226     }
 227   }
 228   deoptimizeAllCounter++;
 229 }
 230 
 231 
 232 void InterfaceSupport::stress_derived_pointers() {
 233 #ifdef COMPILER2
 234   JavaThread *thread = JavaThread::current();
 235   if (!is_init_completed()) return;
 236   ResourceMark rm(thread);
 237   bool found = false;
 238   for (StackFrameStream sfs(thread); !sfs.is_done() && !found; sfs.next()) {
 239     CodeBlob* cb = sfs.current()->cb();
 240     if (cb != NULL && cb->oop_maps() ) {
 241       // Find oopmap for current method
 242       const ImmutableOopMap* map = cb->oop_map_for_return_address(sfs.current()->pc());
 243       assert(map != NULL, "no oopmap found for pc");
 244       found = map->has_derived_pointer();
 245     }
 246   }
 247   if (found) {
 248     // $$$ Not sure what to do here.
 249     /*
 250     Scavenge::invoke(0);
 251     */
 252   }
 253 #endif
 254 }
 255 
 256 
 257 void InterfaceSupport::verify_stack() {
 258   JavaThread* thread = JavaThread::current();
 259   ResourceMark rm(thread);
 260   // disabled because it throws warnings that oop maps should only be accessed
 261   // in VM thread or during debugging
 262