src/share/vm/prims/whitebox.cpp

*** 1034,1043 ****
--- 1034,1050 ----
  
  WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
    return (jlong) MetaspaceGC::capacity_until_GC();
  WB_END
  
+ WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
+   Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
+                                            Monitor::_safepoint_check_always :
+                                            Monitor::_safepoint_check_never;
+   MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
+                    attemptedNoSafepointValue == JNI_TRUE);
+ WB_END
  //Some convenience methods to deal with objects from java
  int WhiteBox::offset_for_field(const char* field_name, oop object,
      Symbol* signature_symbol) {
    assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
    Thread* THREAD = Thread::current();
*** 1226,1235 ****
--- 1233,1243 ----
    {CC"allocateCodeBlob",   CC"(II)J",                 (void*)&WB_AllocateCodeBlob   },
    {CC"freeCodeBlob",       CC"(J)V",                  (void*)&WB_FreeCodeBlob       },
    {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
    {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
    {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
+   {CC"assertMatchingSafepointCalls", CC"(ZZ)V",       (void*)&WB_AssertMatchingSafepointCalls },
  };
  
  #undef CC
  
  JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))