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annotate src/share/vm/runtime/sweeper.hpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | 2a47bd84841f |
| children | f52ed367b66d |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_RUNTIME_SWEEPER_HPP |
| 26 #define SHARE_VM_RUNTIME_SWEEPER_HPP | |
| 27 | |
| 0 | 28 // An NmethodSweeper is an incremental cleaner for: |
| 29 // - cleanup inline caches | |
| 30 // - reclamation of unreferences zombie nmethods | |
| 31 // | |
| 32 | |
| 33 class NMethodSweeper : public AllStatic { | |
| 34 static long _traversals; // Stack traversal count | |
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35 static nmethod* _current; // Current nmethod |
| 0 | 36 static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache |
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37 |
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38 static volatile int _invocations; // No. of invocations left until we are completed with this pass |
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39 static volatile int _sweep_started; // Flag to control conc sweeper |
| 0 | 40 |
| 41 static bool _rescan; // Indicates that we should do a full rescan of the | |
| 42 // of the code cache looking for work to do. | |
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43 static bool _do_sweep; // Flag to skip the conc sweep if no stack scan happened |
| 0 | 44 static int _locked_seen; // Number of locked nmethods encountered during the scan |
| 45 static int _not_entrant_seen_on_stack; // Number of not entrant nmethod were are still on stack | |
| 46 | |
| 1202 | 47 static bool _was_full; // remember if we did emergency unloading |
| 48 static jint _advise_to_sweep; // flag to indicate code cache getting full | |
| 49 static jlong _last_was_full; // timestamp of last emergency unloading | |
| 50 static uint _highest_marked; // highest compile id dumped at last emergency unloading | |
| 51 static long _was_full_traversal; // trav number at last emergency unloading | |
| 0 | 52 |
| 53 static void process_nmethod(nmethod *nm); | |
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54 |
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55 static void log_sweep(const char* msg, const char* format = NULL, ...); |
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56 |
| 0 | 57 public: |
| 58 static long traversal_count() { return _traversals; } | |
| 59 | |
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60 static void scan_stacks(); // Invoked at the end of each safepoint |
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61 static void sweep_code_cache(); // Concurrent part of sweep job |
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62 static void possibly_sweep(); // Compiler threads call this to sweep |
| 0 | 63 |
| 64 static void notify(nmethod* nm) { | |
| 65 // Perform a full scan of the code cache from the beginning. No | |
| 66 // need to synchronize the setting of this flag since it only | |
| 67 // changes to false at safepoint so we can never overwrite it with false. | |
| 68 _rescan = true; | |
| 69 } | |
| 1202 | 70 |
| 71 static void handle_full_code_cache(bool is_full); // Called by compilers who fail to allocate | |
| 72 static void speculative_disconnect_nmethods(bool was_full); // Called by vm op to deal with alloc failure | |
| 73 | |
| 74 static void set_was_full(bool state) { _was_full = state; } | |
| 75 static bool was_full() { return _was_full; } | |
| 0 | 76 }; |
| 1972 | 77 |
| 78 #endif // SHARE_VM_RUNTIME_SWEEPER_HPP |