Mercurial > hg > truffle
annotate src/share/vm/interpreter/rewriter.hpp @ 1339:09ac706c2623
Merge
author | asaha |
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date | Wed, 24 Mar 2010 17:16:33 -0700 |
parents | dd57230ba8fe |
children | c18cbe5936b8 ab102d5d923e |
rev | line source |
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0 | 1 /* |
844 | 2 * Copyright 1998-2009 Sun Microsystems, Inc. All Rights Reserved. |
0 | 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // The Rewriter adds caches to the constant pool and rewrites bytecode indices | |
26 // pointing into the constant pool for better interpreter performance. | |
27 | |
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28 class Rewriter: public StackObj { |
0 | 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, constantPoolHandle cpool, objArrayHandle methods, 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); |
0 | 69 |
70 public: | |
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71 // Driver routine: |
0 | 72 static void rewrite(instanceKlassHandle klass, TRAPS); |
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73 static void rewrite(instanceKlassHandle klass, constantPoolHandle cpool, objArrayHandle methods, TRAPS); |
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74 |
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75 enum { |
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76 _secondary_entry_tag = nth_bit(30) |
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77 }; |
0 | 78 }; |