Mercurial > hg > graal-jvmci-8
view src/share/vm/memory/permGen.cpp @ 17:ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
Reviewed-by: kvn, rasbold
author | never |
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date | Wed, 05 Dec 2007 09:01:00 -0800 |
parents | a61af66fc99e |
children | c0492d52d55b |
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/* * Copyright 2000-2006 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. * */ #include "incls/_precompiled.incl" #include "incls/_permGen.cpp.incl" CompactingPermGen::CompactingPermGen(ReservedSpace rs, ReservedSpace shared_rs, size_t initial_byte_size, GenRemSet* remset, PermanentGenerationSpec* perm_spec) { CompactingPermGenGen* g = new CompactingPermGenGen(rs, shared_rs, initial_byte_size, -1, remset, NULL, perm_spec); if (g == NULL) vm_exit_during_initialization("Could not allocate a CompactingPermGen"); _gen = g; g->initialize_performance_counters(); _capacity_expansion_limit = g->capacity() + MaxPermHeapExpansion; } HeapWord* CompactingPermGen::mem_allocate(size_t size) { MutexLocker ml(Heap_lock); HeapWord* obj = _gen->allocate(size, false); bool tried_collection = false; bool tried_expansion = false; while (obj == NULL) { if (_gen->capacity() >= _capacity_expansion_limit || tried_expansion) { // Expansion limit reached, try collection before expanding further // For now we force a full collection, this could be changed SharedHeap::heap()->collect_locked(GCCause::_permanent_generation_full); obj = _gen->allocate(size, false); tried_collection = true; tried_expansion = false; // ... following the collection: // the collection may have shrunk the space. } if (obj == NULL && !tried_expansion) { obj = _gen->expand_and_allocate(size, false); tried_expansion = true; } if (obj == NULL && tried_collection && tried_expansion) { // We have not been able to allocate despite a collection and // an attempted space expansion. We now make a last-ditch collection // attempt that will try to reclaim as much space as possible (for // example by aggressively clearing all soft refs). SharedHeap::heap()->collect_locked(GCCause::_last_ditch_collection); obj = _gen->allocate(size, false); if (obj == NULL) { // An expansion attempt is necessary since the previous // collection may have shrunk the space. obj = _gen->expand_and_allocate(size, false); } break; } } return obj; } void CompactingPermGen::compute_new_size() { size_t desired_capacity = align_size_up(_gen->used(), MinPermHeapExpansion); if (desired_capacity < PermSize) { desired_capacity = PermSize; } if (_gen->capacity() > desired_capacity) { _gen->shrink(_gen->capacity() - desired_capacity); } _capacity_expansion_limit = _gen->capacity() + MaxPermHeapExpansion; }