I try to get from a C++ program, with JNI, the list of fields of a
class, the goal being to get some reflection information on the C++
side, with this program:

int main( int argC, const char ** argV )
{
   JavaVM *jvm;
   JNIEnv *pEnv;
   JavaVMInitArgs vm_args;
   vm_args.version = JNI_VERSION_1_2;
   vm_args.nOptions = 0;
   vm_args.ignoreUnrecognized = true;

   jint res = JNI_CreateJavaVM(&jvm, (void **)&pEnv, &vm_args);

   jclass tstClass = pEnv->FindClass("MyClass");

   jmethodID initId = pEnv->GetMethodID(tstClass,"<init>","()V");

   jobject tstObjct = pEnv->NewObject(tstClass, initId );

   jclass jlClss = pEnv->FindClass("java/lang/Class");

   jmethodID getFlds = pEnv->GetMethodID(jlClss, "getFields", "()
[Ljava/lang/reflect/Field;");

/// 'Repeated allocation' starts from here...
   jobjectArray fields = (jobjectArray)pEnv-

 ...
   jvm->DestroyJavaVM();
};

... and this class :
class MyClass {
   public String Nam = null;
   public int    Num  = 0;

   public MyClass() {
       this("Alex", 123);
   }
}

... and I get this output after GetMethodId("getFields"):

GC Warning: Repeated allocation of very large block (appr. size
512000):
       May lead to memory leak and poor performance.
GC Warning: Repeated allocation of very large block (appr. size
512000):
       May lead to memory leak and poor performance.
... etc ... (Endless)

I checked all returned values of JNI functions, they are fine.
gcj 4.2.2
gcc 4.2.2

Any idea, please ? Thanks.