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comparison src/share/vm/memory/sharedHeap.hpp @ 14521:29ccc4cbabca

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Merge
author Gilles Duboscq <duboscq@ssw.jku.at>
date Wed, 12 Mar 2014 13:30:08 +0100
parents 10c424c5a362
children 4ca6dc0799b6
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14520:f84115370178 14521:29ccc4cbabca
1 /* 1 /*
2 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2000, 2013, 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.
90 // to a value > 1 before a task that you would like executed in parallel 90 // to a value > 1 before a task that you would like executed in parallel
91 // and then to set it to 0 after that task has completed. A value of 91 // and then to set it to 0 after that task has completed. A value of
92 // 0 is a "special" value in set_n_threads() which translates to 92 // 0 is a "special" value in set_n_threads() which translates to
93 // setting _n_threads to 1. 93 // setting _n_threads to 1.
94 // 94 //
95 // Some code uses _n_terminiation to decide if work should be done in 95 // Some code uses _n_termination to decide if work should be done in
96 // parallel. The notorious possibly_parallel_oops_do() in threads.cpp 96 // parallel. The notorious possibly_parallel_oops_do() in threads.cpp
97 // is an example of such code. Look for variable "is_par" for other 97 // is an example of such code. Look for variable "is_par" for other
98 // examples. 98 // examples.
99 // 99 //
100 // The active_workers is not reset to 0 after a parallel phase. It's 100 // The active_workers is not reset to 0 after a parallel phase. It's
219 enum ScanningOption { 219 enum ScanningOption {
220 SO_None = 0x0, 220 SO_None = 0x0,
221 SO_AllClasses = 0x1, 221 SO_AllClasses = 0x1,
222 SO_SystemClasses = 0x2, 222 SO_SystemClasses = 0x2,
223 SO_Strings = 0x4, 223 SO_Strings = 0x4,
224 SO_CodeCache = 0x8 224 SO_AllCodeCache = 0x8,
225 SO_ScavengeCodeCache = 0x10
225 }; 226 };
226 227
227 FlexibleWorkGang* workers() const { return _workers; } 228 FlexibleWorkGang* workers() const { return _workers; }
228 229
229 // Invoke the "do_oop" method the closure "roots" on all root locations. 230 // Invoke the "do_oop" method the closure "roots" on all root locations.
230 // The "so" argument determines which roots the closure is applied to: 231 // The "so" argument determines which roots the closure is applied to:
231 // "SO_None" does none; 232 // "SO_None" does none;
232 // "SO_AllClasses" applies the closure to all entries in the SystemDictionary; 233 // "SO_AllClasses" applies the closure to all entries in the SystemDictionary;
233 // "SO_SystemClasses" to all the "system" classes and loaders; 234 // "SO_SystemClasses" to all the "system" classes and loaders;
234 // "SO_Strings" applies the closure to all entries in StringTable; 235 // "SO_Strings" applies the closure to all entries in StringTable;
235 // "SO_CodeCache" applies the closure to all elements of the CodeCache. 236 // "SO_AllCodeCache" applies the closure to all elements of the CodeCache.
237 // "SO_ScavengeCodeCache" applies the closure to elements on the scavenge root list in the CodeCache.
236 void process_strong_roots(bool activate_scope, 238 void process_strong_roots(bool activate_scope,
237 bool is_scavenging,
238 ScanningOption so, 239 ScanningOption so,
239 OopClosure* roots, 240 OopClosure* roots,
240 CodeBlobClosure* code_roots,
241 KlassClosure* klass_closure); 241 KlassClosure* klass_closure);
242 242
243 // Apply "blk" to all the weak roots of the system. These include 243 // Apply "root_closure" to the JNI weak roots..
244 // JNI weak roots, the code cache, system dictionary, symbol table, 244 void process_weak_roots(OopClosure* root_closure);
245 // string table.
246 void process_weak_roots(OopClosure* root_closure,
247 CodeBlobClosure* code_roots);
248 245
249 // The functions below are helper functions that a subclass of 246 // The functions below are helper functions that a subclass of
250 // "SharedHeap" can use in the implementation of its virtual 247 // "SharedHeap" can use in the implementation of its virtual
251 // functions. 248 // functions.
252 249
272 size_t bytes_before, 269 size_t bytes_before,
273 size_t bytes_after, 270 size_t bytes_after,
274 size_t capacity); 271 size_t capacity);
275 }; 272 };
276 273
274 inline SharedHeap::ScanningOption operator|(SharedHeap::ScanningOption so0, SharedHeap::ScanningOption so1) {
275 return static_cast<SharedHeap::ScanningOption>(static_cast<int>(so0) | static_cast<int>(so1));
276 }
277
277 #endif // SHARE_VM_MEMORY_SHAREDHEAP_HPP 278 #endif // SHARE_VM_MEMORY_SHAREDHEAP_HPP