src/share/vm/prims/whitebox.cpp

*** 275,284 ****
--- 275,346 ----
  
    return wb_stress_virtual_space_resize((size_t) reserved_space_size,
                                          (size_t) magnitude, (size_t) iterations);
  WB_END
  
+ WB_ENTRY(jboolean, WB_SupportsSerialGC(JNIEnv* env, jobject o, jobject obj))
+   return true;
+ WB_END
+ 
+ WB_ENTRY(jboolean, WB_SupportsParallelGC(JNIEnv* env, jobject o, jobject obj))
+ #if INCLUDE_ALL_GCS
+   return true;
+ #else
+   return false;
+ #endif // INCLUDE_ALL_GCS
+ WB_END
+ 
+ WB_ENTRY(jboolean, WB_SupportsConcMarkSweepGC(JNIEnv* env, jobject o, jobject obj))
+ #if INCLUDE_ALL_GCS
+   return true;
+ #else
+   return false;
+ #endif // INCLUDE_ALL_GCS
+ WB_END
+ 
+ WB_ENTRY(jboolean, WB_SupportsG1GC(JNIEnv* env, jobject o, jobject obj))
+ #if INCLUDE_ALL_GCS
+   return true;
+ #else
+   return false;
+ #endif // INCLUDE_ALL_GCS
+ WB_END
+ 
+ WB_ENTRY(jboolean, WB_GcSelectedByErgo0(JNIEnv* env, jobject o, jobject obj))
+   if (UseSerialGC) {
+     return FLAG_IS_ERGO(UseSerialGC);
+   }
+   if (UseParallelGC) {
+     return FLAG_IS_ERGO(UseParallelGC);
+   }
+   if (UseParallelOldGC) {
+     return FLAG_IS_ERGO(UseParallelOldGC);
+   }
+   if (UseConcMarkSweepGC) {
+     return FLAG_IS_ERGO(UseConcMarkSweepGC);
+   }
+   if (UseG1GC) {
+     return FLAG_IS_ERGO(UseG1GC);
+   }
+   return false; // should not reach here
+ WB_END
+ 
+ WB_ENTRY(jstring, WB_GetGC(JNIEnv* env, jobject o))
+   const char* gc = "unknown";
+   if (UseSerialGC) {
+     gc = "Serial";
+   } else if (UseParallelGC | UseParallelOldGC) {
+     gc = "Parallel";
+   } else if (UseConcMarkSweepGC) {
+     gc = "ConcMarkSweep";
+   } else if (UseG1GC) {
+     gc = "G1";
+   }
+   jstring gc_string = env->NewStringUTF(gc);
+   return gc_string;
+ WB_END
+ 
  WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
    oop p = JNIHandles::resolve(obj);
  #if INCLUDE_ALL_GCS
    if (UseG1GC) {
      G1CollectedHeap* g1 = G1CollectedHeap::heap();
*** 1756,1765 ****
--- 1818,1835 ----
    {CC"areSharedStringsIgnored",           CC"()Z",    (void*)&WB_AreSharedStringsIgnored },
    {CC"clearInlineCaches",  CC"()V",                   (void*)&WB_ClearInlineCaches },
    {CC"addCompilerDirective",    CC"(Ljava/lang/String;)I",
                                                        (void*)&WB_AddCompilerDirective },
    {CC"removeCompilerDirective", CC"(I)V",             (void*)&WB_RemoveCompilerDirective },
+ 
+   {CC"getGC",     CC"()Ljava/lang/String;",  (void*)&WB_GetGC},
+   {CC"gcSelectedByErgo0", CC"()Z",           (void*)&WB_GcSelectedByErgo0},
+   {CC"supportsSerialGC", CC"()Z",            (void*)&WB_SupportsSerialGC},
+   {CC"supportsParallelGC", CC"()Z",          (void*)&WB_SupportsParallelGC},
+   {CC"supportsConcMarkSweepGC", CC"()Z",     (void*)&WB_SupportsConcMarkSweepGC},
+   {CC"supportsG1GC", CC"()Z",                (void*)&WB_SupportsG1GC},
+ 
  };
  
  #undef CC
  
  JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))