1 /*
   2  * Copyright (c) 1997, 2009, 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/_interfaceSupport.cpp.incl"









  27 
  28 
  29 // Implementation of InterfaceSupport
  30 
  31 #ifdef ASSERT
  32 
  33 long InterfaceSupport::_number_of_calls       = 0;
  34 long InterfaceSupport::_scavenge_alot_counter = 1;
  35 long InterfaceSupport::_fullgc_alot_counter   = 1;
  36 long InterfaceSupport::_fullgc_alot_invocation = 0;
  37 
  38 Histogram* RuntimeHistogram;
  39 
  40 RuntimeHistogramElement::RuntimeHistogramElement(const char* elementName) {
  41   static volatile jint RuntimeHistogram_lock = 0;
  42   _name = elementName;
  43   uintx count = 0;
  44 
  45   while (Atomic::cmpxchg(1, &RuntimeHistogram_lock, 0) != 0) {
  46     while (OrderAccess::load_acquire(&RuntimeHistogram_lock) != 0) {

   1 /*
   2  * Copyright (c) 1997, 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 "precompiled.hpp"
  26 #include "gc_implementation/shared/markSweep.hpp"
  27 #include "gc_interface/collectedHeap.hpp"
  28 #include "gc_interface/collectedHeap.inline.hpp"
  29 #include "memory/genCollectedHeap.hpp"
  30 #include "memory/resourceArea.hpp"
  31 #include "runtime/init.hpp"
  32 #include "runtime/interfaceSupport.hpp"
  33 #include "runtime/threadLocalStorage.hpp"
  34 #include "runtime/vframe.hpp"
  35 #include "utilities/preserveException.hpp"
  36 
  37 
  38 // Implementation of InterfaceSupport
  39 
  40 #ifdef ASSERT
  41 
  42 long InterfaceSupport::_number_of_calls       = 0;
  43 long InterfaceSupport::_scavenge_alot_counter = 1;
  44 long InterfaceSupport::_fullgc_alot_counter   = 1;
  45 long InterfaceSupport::_fullgc_alot_invocation = 0;
  46 
  47 Histogram* RuntimeHistogram;
  48 
  49 RuntimeHistogramElement::RuntimeHistogramElement(const char* elementName) {
  50   static volatile jint RuntimeHistogram_lock = 0;
  51   _name = elementName;
  52   uintx count = 0;
  53 
  54   while (Atomic::cmpxchg(1, &RuntimeHistogram_lock, 0) != 0) {
  55     while (OrderAccess::load_acquire(&RuntimeHistogram_lock) != 0) {