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comparison src/share/vm/runtime/sweeper.hpp @ 1644:2a47bd84841f

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6965184: possible races in make_not_entrant_or_zombie Reviewed-by: kvn
author never
date Thu, 08 Jul 2010 14:29:44 -0700
parents ff38d05ea86f
children f95d63e2154a
comparison
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1635:a693e51ac197 1644:2a47bd84841f
1 /* 1 /*
2 * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 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 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
29 29
30 class NMethodSweeper : public AllStatic { 30 class NMethodSweeper : public AllStatic {
31 static long _traversals; // Stack traversal count 31 static long _traversals; // Stack traversal count
32 static nmethod* _current; // Current nmethod 32 static nmethod* _current; // Current nmethod
33 static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache 33 static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache
34 static int _invocations; // No. of invocations left until we are completed with this pass 34
35 static volatile int _invocations; // No. of invocations left until we are completed with this pass
36 static volatile int _sweep_started; // Flag to control conc sweeper
35 37
36 static bool _rescan; // Indicates that we should do a full rescan of the 38 static bool _rescan; // Indicates that we should do a full rescan of the
37 // of the code cache looking for work to do. 39 // of the code cache looking for work to do.
38 static bool _do_sweep; // Flag to skip the conc sweep if no stack scan happened 40 static bool _do_sweep; // Flag to skip the conc sweep if no stack scan happened
39 static jint _sweep_started; // Flag to control conc sweeper
40 static int _locked_seen; // Number of locked nmethods encountered during the scan 41 static int _locked_seen; // Number of locked nmethods encountered during the scan
41 static int _not_entrant_seen_on_stack; // Number of not entrant nmethod were are still on stack 42 static int _not_entrant_seen_on_stack; // Number of not entrant nmethod were are still on stack
42 43
43 static bool _was_full; // remember if we did emergency unloading 44 static bool _was_full; // remember if we did emergency unloading
44 static jint _advise_to_sweep; // flag to indicate code cache getting full 45 static jint _advise_to_sweep; // flag to indicate code cache getting full
45 static jlong _last_was_full; // timestamp of last emergency unloading 46 static jlong _last_was_full; // timestamp of last emergency unloading
46 static uint _highest_marked; // highest compile id dumped at last emergency unloading 47 static uint _highest_marked; // highest compile id dumped at last emergency unloading
47 static long _was_full_traversal; // trav number at last emergency unloading 48 static long _was_full_traversal; // trav number at last emergency unloading
48 49
49 static void process_nmethod(nmethod *nm); 50 static void process_nmethod(nmethod *nm);
51
52 static void log_sweep(const char* msg, const char* format = NULL, ...);
53
50 public: 54 public:
51 static long traversal_count() { return _traversals; } 55 static long traversal_count() { return _traversals; }
52 56
53 static void scan_stacks(); // Invoked at the end of each safepoint 57 static void scan_stacks(); // Invoked at the end of each safepoint
54 static void sweep_code_cache(); // Concurrent part of sweep job 58 static void sweep_code_cache(); // Concurrent part of sweep job