Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/memory/defNewGeneration.inline.hpp
src/share/vm/memory/defNewGeneration.inline.hpp
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| 1 /* | |
| 2 * Copyright 2001-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 CompactibleSpace* DefNewGeneration::first_compaction_space() const { | |
| 26 return eden(); | |
| 27 } | |
| 28 | |
| 29 HeapWord* DefNewGeneration::allocate(size_t word_size, | |
| 30 bool is_tlab) { | |
| 31 // This is the slow-path allocation for the DefNewGeneration. | |
| 32 // Most allocations are fast-path in compiled code. | |
| 33 // We try to allocate from the eden. If that works, we are happy. | |
| 34 // Note that since DefNewGeneration supports lock-free allocation, we | |
| 35 // have to use it here, as well. | |
| 36 HeapWord* result = eden()->par_allocate(word_size); | |
| 37 if (result != NULL) { | |
| 38 return result; | |
| 39 } | |
| 40 do { | |
| 41 HeapWord* old_limit = eden()->soft_end(); | |
| 42 if (old_limit < eden()->end()) { | |
| 43 // Tell the next generation we reached a limit. | |
| 44 HeapWord* new_limit = | |
| 45 next_gen()->allocation_limit_reached(eden(), eden()->top(), word_size); | |
| 46 if (new_limit != NULL) { | |
| 47 Atomic::cmpxchg_ptr(new_limit, eden()->soft_end_addr(), old_limit); | |
| 48 } else { | |
| 49 assert(eden()->soft_end() == eden()->end(), | |
| 50 "invalid state after allocation_limit_reached returned null"); | |
| 51 } | |
| 52 } else { | |
| 53 // The allocation failed and the soft limit is equal to the hard limit, | |
| 54 // there are no reasons to do an attempt to allocate | |
| 55 assert(old_limit == eden()->end(), "sanity check"); | |
| 56 break; | |
| 57 } | |
| 58 // Try to allocate until succeeded or the soft limit can't be adjusted | |
| 59 result = eden()->par_allocate(word_size); | |
| 60 } while (result == NULL); | |
| 61 | |
| 62 // If the eden is full and the last collection bailed out, we are running | |
| 63 // out of heap space, and we try to allocate the from-space, too. | |
| 64 // allocate_from_space can't be inlined because that would introduce a | |
| 65 // circular dependency at compile time. | |
| 66 if (result == NULL) { | |
| 67 result = allocate_from_space(word_size); | |
| 68 } | |
| 69 return result; | |
| 70 } | |
| 71 | |
| 72 HeapWord* DefNewGeneration::par_allocate(size_t word_size, | |
| 73 bool is_tlab) { | |
| 74 return eden()->par_allocate(word_size); | |
| 75 } | |
| 76 | |
| 77 void DefNewGeneration::gc_prologue(bool full) { | |
| 78 // Ensure that _end and _soft_end are the same in eden space. | |
| 79 eden()->set_soft_end(eden()->end()); | |
| 80 } | |
| 81 | |
| 82 size_t DefNewGeneration::tlab_capacity() const { | |
| 83 return eden()->capacity(); | |
| 84 } | |
| 85 | |
| 86 size_t DefNewGeneration::unsafe_max_tlab_alloc() const { | |
| 87 return unsafe_max_alloc_nogc(); | |
| 88 } |
