Mercurial > hg > truffle
annotate src/share/vm/interpreter/rewriter.hpp @ 2904:1916da1d3e11
Merge.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 08 Jun 2011 17:26:49 +0200 |
parents | f95d63e2154a |
children | 2d4b2b833d29 |
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0 | 1 /* |
1579 | 2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_INTERPRETER_REWRITER_HPP |
26 #define SHARE_VM_INTERPRETER_REWRITER_HPP | |
27 | |
28 #include "memory/allocation.hpp" | |
29 #include "runtime/handles.inline.hpp" | |
30 #include "utilities/growableArray.hpp" | |
31 | |
0 | 32 // The Rewriter adds caches to the constant pool and rewrites bytecode indices |
33 // pointing into the constant pool for better interpreter performance. | |
34 | |
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35 class Rewriter: public StackObj { |
0 | 36 private: |
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37 instanceKlassHandle _klass; |
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38 constantPoolHandle _pool; |
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39 objArrayHandle _methods; |
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40 intArray _cp_map; |
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41 intStack _cp_cache_map; |
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42 bool _have_invoke_dynamic; |
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43 |
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44 void init_cp_map(int length) { |
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45 _cp_map.initialize(length, -1); |
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46 // Choose an initial value large enough that we don't get frequent |
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47 // calls to grow(). |
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48 _cp_cache_map.initialize(length / 2); |
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49 } |
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50 int cp_entry_to_cp_cache(int i) { assert(has_cp_cache(i), "oob"); return _cp_map[i]; } |
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51 bool has_cp_cache(int i) { return (uint)i < (uint)_cp_map.length() && _cp_map[i] >= 0; } |
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52 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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53 int add_cp_cache_entry(int cp_index) { |
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54 assert((cp_index & _secondary_entry_tag) == 0, "bad tag"); |
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55 assert(_cp_map[cp_index] == -1, "not twice on same cp_index"); |
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56 int cache_index = _cp_cache_map.append(cp_index); |
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57 _cp_map.at_put(cp_index, cache_index); |
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58 assert(cp_entry_to_cp_cache(cp_index) == cache_index, ""); |
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59 return cache_index; |
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60 } |
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61 int add_secondary_cp_cache_entry(int main_cpc_entry) { |
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62 assert(main_cpc_entry < _cp_cache_map.length(), "must be earlier CP cache entry"); |
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63 int cache_index = _cp_cache_map.append(main_cpc_entry | _secondary_entry_tag); |
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64 return cache_index; |
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65 } |
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66 |
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67 // Access the contents of _cp_cache_map to determine CP cache layout. |
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68 int cp_cache_entry_pool_index(int cache_index) { |
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69 int cp_index = _cp_cache_map[cache_index]; |
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70 if ((cp_index & _secondary_entry_tag) != 0) |
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71 return -1; |
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72 else |
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73 return cp_index; |
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74 } |
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75 int cp_cache_secondary_entry_main_index(int cache_index) { |
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76 int cp_index = _cp_cache_map[cache_index]; |
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77 if ((cp_index & _secondary_entry_tag) == 0) |
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78 return -1; |
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79 else |
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80 return (cp_index - _secondary_entry_tag); |
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81 } |
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82 |
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83 // All the work goes in here: |
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84 Rewriter(instanceKlassHandle klass, constantPoolHandle cpool, objArrayHandle methods, TRAPS); |
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85 |
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86 void compute_index_maps(); |
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87 void make_constant_pool_cache(TRAPS); |
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88 void scan_method(methodOop m); |
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89 methodHandle rewrite_jsrs(methodHandle m, TRAPS); |
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90 void rewrite_Object_init(methodHandle m, TRAPS); |
1565 | 91 void rewrite_member_reference(address bcp, int offset); |
92 void rewrite_invokedynamic(address bcp, int offset); | |
1602 | 93 void maybe_rewrite_ldc(address bcp, int offset, bool is_wide); |
0 | 94 |
95 public: | |
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96 // Driver routine: |
0 | 97 static void rewrite(instanceKlassHandle klass, TRAPS); |
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98 static void rewrite(instanceKlassHandle klass, constantPoolHandle cpool, objArrayHandle methods, TRAPS); |
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99 |
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100 enum { |
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101 _secondary_entry_tag = nth_bit(30) |
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102 }; |
0 | 103 }; |
1972 | 104 |
105 #endif // SHARE_VM_INTERPRETER_REWRITER_HPP |