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annotate src/share/vm/interpreter/rewriter.hpp @ 1059:389049f3f393

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6858164: invokedynamic code needs some cleanup (post-6655638) Summary: Fix several crashers, remove needless paths for boxed-style bootstrap method call, refactor & simplify APIs for rewriter constantPoolOop, remove sun.dyn.CallSiteImpl Reviewed-by: kvn
author jrose
date Fri, 30 Oct 2009 16:22:59 -0700
parents bd02caa94611
children dd57230ba8fe
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1 /*
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2 * Copyright 1998-2009 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // The Rewriter adds caches to the constant pool and rewrites bytecode indices
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26 // pointing into the constant pool for better interpreter performance.
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27
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28 class Rewriter: public StackObj {
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29 private:
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30 instanceKlassHandle _klass;
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31 constantPoolHandle _pool;
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32 objArrayHandle _methods;
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33 intArray _cp_map;
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34 intStack _cp_cache_map;
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35
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36 void init_cp_map(int length) {
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37 _cp_map.initialize(length, -1);
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38 // Choose an initial value large enough that we don't get frequent
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39 // calls to grow().
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40 _cp_cache_map.initialize(length / 2);
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41 }
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42 int cp_entry_to_cp_cache(int i) { assert(has_cp_cache(i), "oob"); return _cp_map[i]; }
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43 bool has_cp_cache(int i) { return (uint)i < (uint)_cp_map.length() && _cp_map[i] >= 0; }
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44 int maybe_add_cp_cache_entry(int i) { return has_cp_cache(i) ? _cp_map[i] : add_cp_cache_entry(i); }
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45 int add_cp_cache_entry(int cp_index) {
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46 assert((cp_index & _secondary_entry_tag) == 0, "bad tag");
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47 assert(_cp_map[cp_index] == -1, "not twice on same cp_index");
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48 int cache_index = _cp_cache_map.append(cp_index);
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49 _cp_map.at_put(cp_index, cache_index);
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50 assert(cp_entry_to_cp_cache(cp_index) == cache_index, "");
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51 return cache_index;
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52 }
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53 int add_secondary_cp_cache_entry(int main_cpc_entry) {
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54 assert(main_cpc_entry < _cp_cache_map.length(), "must be earlier CP cache entry");
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55 int cache_index = _cp_cache_map.append(main_cpc_entry | _secondary_entry_tag);
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56 return cache_index;
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57 }
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58
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59 // All the work goes in here:
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60 Rewriter(instanceKlassHandle klass, TRAPS);
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61
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62 void compute_index_maps();
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63 void make_constant_pool_cache(TRAPS);
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64 void scan_method(methodOop m);
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65 methodHandle rewrite_jsrs(methodHandle m, TRAPS);
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66 void rewrite_Object_init(methodHandle m, TRAPS);
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67 int rewrite_member_reference(address bcp, int offset);
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68 void rewrite_invokedynamic(address bcp, int offset, int cp_index);
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70 public:
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71 // Driver routine:
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72 static void rewrite(instanceKlassHandle klass, TRAPS);
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73
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74 enum {
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75 _secondary_entry_tag = nth_bit(30)
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76 };
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77 };