Mon, 18 Mar 2013 13:19:06 +0100
8008555: Debugging code in compiled method sometimes leaks memory
Summary: support for strings that have same life-time as code that uses them.
Reviewed-by: kvn, twisti
1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_RUNTIME_APROFILER_HPP
26 #define SHARE_VM_RUNTIME_APROFILER_HPP
28 #include "memory/allocation.hpp"
29 #include "memory/universe.hpp"
30 #include "oops/klass.hpp"
31 #include "utilities/top.hpp"
33 // A simple allocation profiler for Java. The profiler collects and prints
34 // the number and total size of instances allocated per class, including
35 // array classes.
36 //
37 // The profiler is currently global for all threads. It can be changed to a
38 // per threads profiler by keeping a more elaborate data structure and calling
39 // iterate_since_last_scavenge at thread switches.
42 class AllocationProfiler: AllStatic {
43 friend class GenCollectedHeap;
44 friend class G1CollectedHeap;
45 friend class MarkSweep;
46 private:
47 static bool _active; // tells whether profiler is active
48 static GrowableArray<Klass*>* _print_array; // temporary array for printing
50 // Utility printing functions
51 static void add_class_to_array(Klass* k);
52 static void add_classes_to_array(Klass* k);
53 static int compare_classes(Klass** k1, Klass** k2);
54 static int average(size_t alloc_size, int alloc_count);
55 static void sort_and_print_array(size_t cutoff);
57 // Call for collecting allocation information. Called at scavenge, mark-sweep and disengage.
58 static void iterate_since_last_gc();
60 public:
61 // Start profiler
62 static void engage();
63 // Stop profiler
64 static void disengage();
65 // Tells whether profiler is active
66 static bool is_active() { return _active; }
67 // Print profile
68 static void print(size_t cutoff); // Cutoff in total allocation size (in words)
69 };
71 #endif // SHARE_VM_RUNTIME_APROFILER_HPP