--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/runtime/aprofiler.hpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,60 @@
+/*
+ * Copyright 1997-2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// A simple allocation profiler for Java. The profiler collects and prints
+// the number and total size of instances allocated per class, including
+// array classes.
+//
+// The profiler is currently global for all threads. It can be changed to a
+// per threads profiler by keeping a more elaborate data structure and calling
+// iterate_since_last_scavenge at thread switches.
+
+
+class AllocationProfiler: AllStatic {
+ friend class GenCollectedHeap;
+ friend class MarkSweep;
+ private:
+ static bool _active; // tells whether profiler is active
+ static GrowableArray<klassOop>* _print_array; // temporary array for printing
+
+ // Utility printing functions
+ static void add_class_to_array(klassOop k);
+ static void add_classes_to_array(klassOop k);
+ static int compare_classes(klassOop* k1, klassOop* k2);
+ static int average(size_t alloc_size, int alloc_count);
+ static void sort_and_print_array(size_t cutoff);
+
+ // Call for collecting allocation information. Called at scavenge, mark-sweep and disengage.
+ static void iterate_since_last_gc();
+
+ public:
+ // Start profiler
+ static void engage();
+ // Stop profiler
+ static void disengage();
+ // Tells whether profiler is active
+ static bool is_active() { return _active; }
+ // Print profile
+ static void print(size_t cutoff); // Cutoff in total allocation size (in words)
+};