Mercurial > hg > truffle
diff src/share/vm/memory/defNewGeneration.inline.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | ba764ed4b6f2 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/memory/defNewGeneration.inline.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,88 @@ +/* + * Copyright 2001-2006 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +CompactibleSpace* DefNewGeneration::first_compaction_space() const { + return eden(); +} + +HeapWord* DefNewGeneration::allocate(size_t word_size, + bool is_tlab) { + // This is the slow-path allocation for the DefNewGeneration. + // Most allocations are fast-path in compiled code. + // We try to allocate from the eden. If that works, we are happy. + // Note that since DefNewGeneration supports lock-free allocation, we + // have to use it here, as well. + HeapWord* result = eden()->par_allocate(word_size); + if (result != NULL) { + return result; + } + do { + HeapWord* old_limit = eden()->soft_end(); + if (old_limit < eden()->end()) { + // Tell the next generation we reached a limit. + HeapWord* new_limit = + next_gen()->allocation_limit_reached(eden(), eden()->top(), word_size); + if (new_limit != NULL) { + Atomic::cmpxchg_ptr(new_limit, eden()->soft_end_addr(), old_limit); + } else { + assert(eden()->soft_end() == eden()->end(), + "invalid state after allocation_limit_reached returned null"); + } + } else { + // The allocation failed and the soft limit is equal to the hard limit, + // there are no reasons to do an attempt to allocate + assert(old_limit == eden()->end(), "sanity check"); + break; + } + // Try to allocate until succeeded or the soft limit can't be adjusted + result = eden()->par_allocate(word_size); + } while (result == NULL); + + // If the eden is full and the last collection bailed out, we are running + // out of heap space, and we try to allocate the from-space, too. + // allocate_from_space can't be inlined because that would introduce a + // circular dependency at compile time. + if (result == NULL) { + result = allocate_from_space(word_size); + } + return result; +} + +HeapWord* DefNewGeneration::par_allocate(size_t word_size, + bool is_tlab) { + return eden()->par_allocate(word_size); +} + +void DefNewGeneration::gc_prologue(bool full) { + // Ensure that _end and _soft_end are the same in eden space. + eden()->set_soft_end(eden()->end()); +} + +size_t DefNewGeneration::tlab_capacity() const { + return eden()->capacity(); +} + +size_t DefNewGeneration::unsafe_max_tlab_alloc() const { + return unsafe_max_alloc_nogc(); +}