--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/logging/logDiagnosticCommand.hpp	Thu Sep 24 12:36:04 2015 +0200
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+#ifndef SHARE_VM_LOGGING_LOGDIAGNOSTICCOMMAND_HPP
+#define SHARE_VM_LOGGING_LOGDIAGNOSTICCOMMAND_HPP
+
+#include "services/diagnosticCommand.hpp"
+
+// The LogDiagnosticCommand represents the 'VM.log' DCMD
+// that allows configuration of the logging at runtime.
+// It can be used to view or modify the current log configuration.
+// VM.log without additional arguments prints the usage description.
+// The 'list' argument will list all available log tags,
+// levels, decorators and currently configured log outputs.
+// Specifying 'disable' will disable logging completely.
+// The remaining arguments are used to set a log output to log everything
+// with the specified tags and levels using the given decorators.
+class LogDiagnosticCommand : public DCmdWithParser {
+ protected:
+  DCmdArgument<char *> _output;
+  DCmdArgument<char *> _output_options;
+  DCmdArgument<char *> _what;
+  DCmdArgument<char *> _decorators;
+  DCmdArgument<bool> _disable;
+  DCmdArgument<bool> _list;
+
+ public:
+  LogDiagnosticCommand(outputStream* output, bool heap_allocated);
+  void execute(DCmdSource source, TRAPS);
+  static void registerCommand();
+  static int num_arguments();
+
+  static const char* name() {
+    return "VM.log";
+  }
+
+  static const char* description() {
+    return "Lists, enables, disables or changes a log output configuration.";
+  }
+
+  // Used by SecurityManager. This DCMD requires ManagementPermission = control.
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission", "control", NULL};
+    return p;
+  }
+};
+
+#endif // SHARE_VM_LOGGING_LOGDIAGNOSTICCOMMAND_HPP