1 /*
   2  * Copyright (c) 2005, 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 
  26 #include "incls/_precompiled.incl"
  27 #include "incls/_bcEscapeAnalyzer.cpp.incl"
  28 
  29 
  30 #ifndef PRODUCT
  31   #define TRACE_BCEA(level, code)                                            \
  32     if (EstimateArgEscape && BCEATraceLevel >= level) {                        \
  33       code;                                                                  \
  34     }
  35 #else
  36   #define TRACE_BCEA(level, code)
  37 #endif
  38 
  39 // Maintain a map of which aguments a local variable or
  40 // stack slot may contain.  In addition to tracking
  41 // arguments, it tracks two special values, "allocated"
  42 // which represents any object allocated in the current
  43 // method, and "unknown" which is any other object.
  44 // Up to 30 arguments are handled, with the last one
  45 // representing summary information for any extra arguments
  46 class BCEscapeAnalyzer::ArgumentMap {
  47   uint  _bits;

   1 /*
   2  * Copyright (c) 2005, 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 "ci/bcEscapeAnalyzer.hpp"
  27 #include "ci/ciConstant.hpp"
  28 #include "ci/ciField.hpp"
  29 #include "ci/ciMethodBlocks.hpp"
  30 #include "ci/ciStreams.hpp"
  31 #include "interpreter/bytecode.hpp"
  32 #include "utilities/bitMap.inline.hpp"
  33 


  34 
  35 
  36 #ifndef PRODUCT
  37   #define TRACE_BCEA(level, code)                                            \
  38     if (EstimateArgEscape && BCEATraceLevel >= level) {                        \
  39       code;                                                                  \
  40     }
  41 #else
  42   #define TRACE_BCEA(level, code)
  43 #endif
  44 
  45 // Maintain a map of which aguments a local variable or
  46 // stack slot may contain.  In addition to tracking
  47 // arguments, it tracks two special values, "allocated"
  48 // which represents any object allocated in the current
  49 // method, and "unknown" which is any other object.
  50 // Up to 30 arguments are handled, with the last one
  51 // representing summary information for any extra arguments
  52 class BCEscapeAnalyzer::ArgumentMap {
  53   uint  _bits;