--- old/src/hotspot/share/prims/whitebox.cpp	2019-04-25 11:54:20.734028089 +0200
+++ new/src/hotspot/share/prims/whitebox.cpp	2019-04-25 11:54:20.005003536 +0200
@@ -819,8 +819,7 @@
 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
   MutexLockerEx mu(Compile_lock);
   CodeCache::mark_all_nmethods_for_deoptimization();
-  VM_Deoptimize op;
-  VMThread::execute(&op);
+  Deoptimization::deoptimize_all_marked();
 WB_END
 
 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
@@ -837,8 +836,7 @@
   }
   result += CodeCache::mark_for_deoptimization(mh());
   if (result > 0) {
-    VM_Deoptimize op;
-    VMThread::execute(&op);
+    Deoptimization::deoptimize_all_marked();
   }
   return result;
 WB_END