1 /* 2 * Copyright (c) 2007, 2010, 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 */ 24 25 #include "incls/_precompiled.incl" 26 #include "incls/_cmsPermGen.cpp.incl" 27 28 CMSPermGen::CMSPermGen(ReservedSpace rs, size_t initial_byte_size, 29 CardTableRS* ct, 30 FreeBlockDictionary::DictionaryChoice dictionaryChoice) { 31 CMSPermGenGen* g = 32 new CMSPermGenGen(rs, initial_byte_size, -1, ct); 33 if (g == NULL) { 34 vm_exit_during_initialization("Could not allocate a CompactingPermGen"); 35 } 36 37 g->initialize_performance_counters(); 38 39 _gen = g; 40 } 41 42 HeapWord* CMSPermGen::mem_allocate(size_t size) { 43 Mutex* lock = _gen->freelistLock(); 44 bool lock_owned = lock->owned_by_self(); 45 if (lock_owned) { 46 MutexUnlocker mul(lock); 47 return mem_allocate_in_gen(size, _gen); 48 } else { 49 return mem_allocate_in_gen(size, _gen); 50 } 51 } 52 53 HeapWord* CMSPermGen::request_expand_and_allocate(Generation* gen, 54 size_t size, 55 GCCause::Cause prev_cause /* ignored */) { 56 HeapWord* obj = gen->expand_and_allocate(size, false); 57 if (gen->capacity() >= _capacity_expansion_limit) { 58 set_capacity_expansion_limit(gen->capacity() + MaxPermHeapExpansion); 59 assert(((ConcurrentMarkSweepGeneration*)gen)->should_concurrent_collect(), 60 "Should kick off a collection if one not in progress"); 61 } 62 return obj; 63 } 64 65 void CMSPermGen::compute_new_size() { 66 _gen->compute_new_size(); 67 } 68 69 void CMSPermGenGen::initialize_performance_counters() { 70 71 const char* gen_name = "perm"; 72 73 // Generation Counters - generation 2, 1 subspace 74 _gen_counters = new GenerationCounters(gen_name, 2, 1, &_virtual_space); 75 76 _gc_counters = NULL; 77 78 _space_counters = new GSpaceCounters(gen_name, 0, 79 _virtual_space.reserved_size(), 80 this, _gen_counters); 81 }