diff -r c4ecde2f6b3c -r ba7ea42fc66e src/share/vm/services/management.cpp
--- a/src/share/vm/services/management.cpp	Fri Oct 30 17:24:14 2009 -0700
+++ b/src/share/vm/services/management.cpp	Wed Nov 04 16:49:23 2009 -0500
@@ -1507,16 +1507,17 @@
   return (jobjectArray)JNIHandles::make_local(env, flags_ah());
 JVM_END
 
-// utility function used by jmm_GetVMGlobals
-void add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) {
+// Utility function used by jmm_GetVMGlobals.  Returns false if flag type
+// can't be determined, true otherwise.  If false is returned, then *global
+// will be incomplete and invalid.
+bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) {
   Handle flag_name;
   if (name() == NULL) {
-    flag_name = java_lang_String::create_from_str(flag->name, CHECK);
+    flag_name = java_lang_String::create_from_str(flag->name, CHECK_false);
   } else {
     flag_name = name;
   }
   global->name = (jstring)JNIHandles::make_local(env, flag_name());
-  global->type = JMM_VMGLOBAL_TYPE_UNKNOWN;
 
   if (flag->is_bool()) {
     global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE;
@@ -1527,10 +1528,17 @@
   } else if (flag->is_uintx()) {
     global->value.j = (jlong)flag->get_uintx();
     global->type = JMM_VMGLOBAL_TYPE_JLONG;
+  } else if (flag->is_uint64_t()) {
+    global->value.j = (jlong)flag->get_uint64_t();
+    global->type = JMM_VMGLOBAL_TYPE_JLONG;
   } else if (flag->is_ccstr()) {
-    Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK);
+    Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false);
     global->value.l = (jobject)JNIHandles::make_local(env, str());
     global->type = JMM_VMGLOBAL_TYPE_JSTRING;
+  } else {
+    global->type = JMM_VMGLOBAL_TYPE_UNKNOWN;
+    assert(false, "Unsupported VMGlobal Type");
+    return false;
   }
 
   global->writeable = flag->is_writeable();
@@ -1557,6 +1565,8 @@
     default:
       global->origin = JMM_VMGLOBAL_ORIGIN_OTHER;
   }
+
+  return true;
 }
 
 // Fill globals array of count length with jmmVMGlobal entries
@@ -1599,8 +1609,8 @@
       Handle sh(THREAD, s);
       char* str = java_lang_String::as_utf8_string(s);
       Flag* flag = Flag::find_flag(str, strlen(str));
-      if (flag != NULL) {
-        add_global_entry(env, sh, &globals[i], flag, THREAD);
+      if (flag != NULL &&
+          add_global_entry(env, sh, &globals[i], flag, THREAD)) {
         num_entries++;
       } else {
         globals[i].name = NULL;
@@ -1617,8 +1627,8 @@
     for (int i = 0; i < nFlags && num_entries < count;  i++) {
       Flag* flag = &Flag::flags[i];
       // Exclude the locked (diagnostic, experimental) flags
-      if (flag->is_unlocked() || flag->is_unlocker()) {
-        add_global_entry(env, null_h, &globals[num_entries], flag, THREAD);
+      if ((flag->is_unlocked() || flag->is_unlocker()) &&
+          add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) {
         num_entries++;
       }
     }
@@ -1650,11 +1660,14 @@
     bool bvalue = (new_value.z == JNI_TRUE ? true : false);
     succeed = CommandLineFlags::boolAtPut(name, &bvalue, MANAGEMENT);
   } else if (flag->is_intx()) {
-    intx ivalue = new_value.j;
+    intx ivalue = (intx)new_value.j;
     succeed = CommandLineFlags::intxAtPut(name, &ivalue, MANAGEMENT);
   } else if (flag->is_uintx()) {
-    uintx uvalue = new_value.j;
+    uintx uvalue = (uintx)new_value.j;
     succeed = CommandLineFlags::uintxAtPut(name, &uvalue, MANAGEMENT);
+  } else if (flag->is_uint64_t()) {
+    uint64_t uvalue = (uint64_t)new_value.j;
+    succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, MANAGEMENT);
   } else if (flag->is_ccstr()) {
     oop str = JNIHandles::resolve_external_guard(new_value.l);
     if (str == NULL) {