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/_methodDataOop.cpp.incl"









  27 
  28 // ==================================================================
  29 // DataLayout
  30 //
  31 // Overlay for generic profiling data.
  32 
  33 // Some types of data layouts need a length field.
  34 bool DataLayout::needs_array_len(u1 tag) {
  35   return (tag == multi_branch_data_tag) || (tag == arg_info_data_tag);
  36 }
  37 
  38 // Perform generic initialization of the data.  More specific
  39 // initialization occurs in overrides of ProfileData::post_initialize.
  40 void DataLayout::initialize(u1 tag, u2 bci, int cell_count) {
  41   _header._bits = (intptr_t)0;
  42   _header._struct._tag = tag;
  43   _header._struct._bci = bci;
  44   for (int i = 0; i < cell_count; i++) {
  45     set_cell_at(i, (intptr_t)0);
  46   }

   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 "classfile/systemDictionary.hpp"
  27 #include "gc_implementation/shared/markSweep.inline.hpp"
  28 #include "interpreter/bytecode.hpp"
  29 #include "interpreter/bytecodeStream.hpp"
  30 #include "interpreter/linkResolver.hpp"
  31 #include "oops/methodDataOop.hpp"
  32 #include "oops/oop.inline.hpp"
  33 #include "runtime/compilationPolicy.hpp"
  34 #include "runtime/deoptimization.hpp"
  35 #include "runtime/handles.inline.hpp"
  36 
  37 // ==================================================================
  38 // DataLayout
  39 //
  40 // Overlay for generic profiling data.
  41 
  42 // Some types of data layouts need a length field.
  43 bool DataLayout::needs_array_len(u1 tag) {
  44   return (tag == multi_branch_data_tag) || (tag == arg_info_data_tag);
  45 }
  46 
  47 // Perform generic initialization of the data.  More specific
  48 // initialization occurs in overrides of ProfileData::post_initialize.
  49 void DataLayout::initialize(u1 tag, u2 bci, int cell_count) {
  50   _header._bits = (intptr_t)0;
  51   _header._struct._tag = tag;
  52   _header._struct._bci = bci;
  53   for (int i = 0; i < cell_count; i++) {
  54     set_cell_at(i, (intptr_t)0);
  55   }