jdk8-mips64-public/hotspot: src/share/vm/interpreter/rewriter.hpp@f08d439fab8c (annotated)

src/share/vm/interpreter/rewriter.hpp@f08d439fab8c (annotated)

src/share/vm/interpreter/rewriter.hpp

Sun, 25 Sep 2011 16:03:29 -0700

author: never
date: Sun, 25 Sep 2011 16:03:29 -0700
changeset 3156: f08d439fab8c
parent 2945: d3b9f2be46ab
child 3969: 1d7922586cf6
permissions: -rw-r--r--

7089790: integrate bsd-port changes
Reviewed-by: kvn, twisti, jrose
Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>

 /*
  * Copyright (c) 1998, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_INTERPRETER_REWRITER_HPP
 #define SHARE_VM_INTERPRETER_REWRITER_HPP
 #include "memory/allocation.hpp"
 #include "runtime/handles.inline.hpp"
 #include "utilities/growableArray.hpp"
 // The Rewriter adds caches to the constant pool and rewrites bytecode indices
 // pointing into the constant pool for better interpreter performance.
 class Rewriter: public StackObj {
  private:
   instanceKlassHandle _klass;
   constantPoolHandle  _pool;
   objArrayHandle      _methods;
   intArray            _cp_map;
   intStack            _cp_cache_map;
   bool                _have_invoke_dynamic;
   void init_cp_map(int length) {
     _cp_map.initialize(length, -1);
     // Choose an initial value large enough that we don't get frequent
     // calls to grow().
     _cp_cache_map.initialize(length / 2);
   }
   int  cp_entry_to_cp_cache(int i) { assert(has_cp_cache(i), "oob"); return _cp_map[i]; }
   bool has_cp_cache(int i) { return (uint)i < (uint)_cp_map.length() && _cp_map[i] >= 0; }
   int maybe_add_cp_cache_entry(int i) { return has_cp_cache(i) ? _cp_map[i] : add_cp_cache_entry(i); }
   int add_cp_cache_entry(int cp_index) {
     assert((cp_index & _secondary_entry_tag) == 0, "bad tag");
     assert(_cp_map[cp_index] == -1, "not twice on same cp_index");
     int cache_index = _cp_cache_map.append(cp_index);
     _cp_map.at_put(cp_index, cache_index);
     assert(cp_entry_to_cp_cache(cp_index) == cache_index, "");
     return cache_index;
   }
   int add_secondary_cp_cache_entry(int main_cpc_entry) {
     assert(main_cpc_entry < _cp_cache_map.length(), "must be earlier CP cache entry");
     int cache_index = _cp_cache_map.append(main_cpc_entry | _secondary_entry_tag);
     return cache_index;
   }
   // Access the contents of _cp_cache_map to determine CP cache layout.
   int cp_cache_entry_pool_index(int cache_index) {
     int cp_index = _cp_cache_map[cache_index];
     if ((cp_index & _secondary_entry_tag) != 0)
       return -1;
     else
       return cp_index;
   }
   int cp_cache_secondary_entry_main_index(int cache_index) {
     int cp_index = _cp_cache_map[cache_index];
     if ((cp_index & _secondary_entry_tag) == 0)
       return -1;
     else
       return (cp_index - _secondary_entry_tag);
   }
   // All the work goes in here:
   Rewriter(instanceKlassHandle klass, constantPoolHandle cpool, objArrayHandle methods, TRAPS);
   void compute_index_maps();
   void make_constant_pool_cache(TRAPS);
   void scan_method(methodOop m, bool reverse = false);
   void rewrite_Object_init(methodHandle m, TRAPS);
   void rewrite_member_reference(address bcp, int offset, bool reverse = false);
   void rewrite_invokedynamic(address bcp, int offset, bool reverse = false);
   void maybe_rewrite_ldc(address bcp, int offset, bool is_wide, bool reverse = false);
   // Revert bytecodes in case of an exception.
   void restore_bytecodes();
   static methodHandle rewrite_jsrs(methodHandle m, TRAPS);
  public:
   // Driver routine:
   static void rewrite(instanceKlassHandle klass, TRAPS);
   static void rewrite(instanceKlassHandle klass, constantPoolHandle cpool, objArrayHandle methods, TRAPS);
   enum {
     _secondary_entry_tag = nth_bit(30)
   };
   // Second pass, not gated by is_rewritten flag
   static void relocate_and_link(instanceKlassHandle klass, TRAPS);
   // JSR292 version to call with it's own methods.
   static void relocate_and_link(instanceKlassHandle klass,
                                 objArrayHandle methods, TRAPS);
 };
 #endif // SHARE_VM_INTERPRETER_REWRITER_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/interpreter/rewriter.hpp@f08d439fab8c (annotated)

src/share/vm/interpreter/rewriter.hpp