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 }