--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/gc/shared/gcCause.hpp	Wed May 13 15:16:06 2015 +0200
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2002, 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_GC_SHARED_GCCAUSE_HPP
+#define SHARE_VM_GC_SHARED_GCCAUSE_HPP
+
+#include "memory/allocation.hpp"
+
+//
+// This class exposes implementation details of the various
+// collector(s), and we need to be very careful with it. If
+// use of this class grows, we should split it into public
+// and implementation-private "causes".
+//
+
+class GCCause : public AllStatic {
+ public:
+  enum Cause {
+    /* public */
+    _java_lang_system_gc,
+    _full_gc_alot,
+    _scavenge_alot,
+    _allocation_profiler,
+    _jvmti_force_gc,
+    _gc_locker,
+    _heap_inspection,
+    _heap_dump,
+    _wb_young_gc,
+    _wb_conc_mark,
+    _update_allocation_context_stats_inc,
+    _update_allocation_context_stats_full,
+
+    /* implementation independent, but reserved for GC use */
+    _no_gc,
+    _no_cause_specified,
+    _allocation_failure,
+
+    /* implementation specific */
+
+    _tenured_generation_full,
+    _metadata_GC_threshold,
+
+    _cms_generation_full,
+    _cms_initial_mark,
+    _cms_final_remark,
+    _cms_concurrent_mark,
+
+    _old_generation_expanded_on_last_scavenge,
+    _old_generation_too_full_to_scavenge,
+    _adaptive_size_policy,
+
+    _g1_inc_collection_pause,
+    _g1_humongous_allocation,
+
+    _last_ditch_collection,
+    _last_gc_cause
+  };
+
+  inline static bool is_user_requested_gc(GCCause::Cause cause) {
+    return (cause == GCCause::_java_lang_system_gc ||
+            cause == GCCause::_jvmti_force_gc);
+  }
+
+  inline static bool is_serviceability_requested_gc(GCCause::Cause
+                                                             cause) {
+    return (cause == GCCause::_jvmti_force_gc ||
+            cause == GCCause::_heap_inspection ||
+            cause == GCCause::_heap_dump);
+  }
+
+  // Return a string describing the GCCause.
+  static const char* to_string(GCCause::Cause cause);
+};
+
+// Helper class for doing logging that includes the GC Cause
+// as a string.
+class GCCauseString : StackObj {
+ private:
+   static const int _length = 128;
+   char _buffer[_length];
+   int _position;
+
+ public:
+   GCCauseString(const char* prefix, GCCause::Cause cause) {
+     if (PrintGCCause) {
+      _position = jio_snprintf(_buffer, _length, "%s (%s) ", prefix, GCCause::to_string(cause));
+     } else {
+      _position = jio_snprintf(_buffer, _length, "%s ", prefix);
+     }
+     assert(_position >= 0 && _position <= _length,
+       err_msg("Need to increase the buffer size in GCCauseString? %d", _position));
+   }
+
+   GCCauseString& append(const char* str) {
+     int res = jio_snprintf(_buffer + _position, _length - _position, "%s", str);
+     _position += res;
+     assert(res >= 0 && _position <= _length,
+       err_msg("Need to increase the buffer size in GCCauseString? %d", res));
+     return *this;
+   }
+
+   operator const char*() {
+     return _buffer;
+   }
+};
+
+#endif // SHARE_VM_GC_SHARED_GCCAUSE_HPP