Mercurial > hg > truffle
annotate src/share/vm/oops/constMethod.cpp @ 8615:91c79e13b9cf
minor C1/C2 fix
author | Christian Haeubl <haeubl@ssw.jku.at> |
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date | Thu, 28 Mar 2013 13:38:47 +0100 |
parents | 927a311d00f9 |
children | 3efdfd6ddbf2 |
rev | line source |
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0 | 1 /* |
7956 | 2 * Copyright (c) 2003, 2013, 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 * | |
1552
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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 #include "precompiled.hpp" |
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26 #include "interpreter/interpreter.hpp" |
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27 #include "memory/gcLocker.hpp" |
7956 | 28 #include "memory/heapInspection.hpp" |
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29 #include "memory/metadataFactory.hpp" |
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30 #include "oops/constMethod.hpp" |
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31 #include "oops/method.hpp" |
0 | 32 |
33 // Static initialization | |
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34 const u2 ConstMethod::MAX_IDNUM = 0xFFFE; |
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35 const u2 ConstMethod::UNSET_IDNUM = 0xFFFF; |
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36 |
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37 ConstMethod* ConstMethod::allocate(ClassLoaderData* loader_data, |
6934 | 38 int byte_code_size, |
8031 | 39 InlineTableSizes* sizes, |
6934 | 40 MethodType method_type, |
41 TRAPS) { | |
8031 | 42 int size = ConstMethod::size(byte_code_size, sizes); |
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43 return new (loader_data, size, true, THREAD) ConstMethod( |
8031 | 44 byte_code_size, sizes, method_type, size); |
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45 } |
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46 |
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47 ConstMethod::ConstMethod(int byte_code_size, |
8031 | 48 InlineTableSizes* sizes, |
6934 | 49 MethodType method_type, |
50 int size) { | |
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51 |
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52 No_Safepoint_Verifier no_safepoint; |
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53 init_fingerprint(); |
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54 set_constants(NULL); |
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55 set_stackmap_data(NULL); |
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56 set_code_size(byte_code_size); |
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57 set_constMethod_size(size); |
8031 | 58 set_inlined_tables_length(sizes); |
6934 | 59 set_method_type(method_type); |
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60 assert(this->size() == size, "wrong size for object"); |
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61 } |
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62 |
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63 |
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64 // Deallocate metadata fields associated with ConstMethod* |
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65 void ConstMethod::deallocate_contents(ClassLoaderData* loader_data) { |
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66 if (stackmap_data() != NULL) { |
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67 MetadataFactory::free_array<u1>(loader_data, stackmap_data()); |
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68 } |
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69 set_stackmap_data(NULL); |
8031 | 70 |
71 // deallocate annotation arrays | |
72 if (has_method_annotations()) | |
73 MetadataFactory::free_array<u1>(loader_data, method_annotations()); | |
74 if (has_parameter_annotations()) | |
75 MetadataFactory::free_array<u1>(loader_data, parameter_annotations()); | |
76 if (has_type_annotations()) | |
77 MetadataFactory::free_array<u1>(loader_data, type_annotations()); | |
78 if (has_default_annotations()) | |
79 MetadataFactory::free_array<u1>(loader_data, default_annotations()); | |
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80 } |
0 | 81 |
82 // How big must this constMethodObject be? | |
83 | |
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84 int ConstMethod::size(int code_size, |
8031 | 85 InlineTableSizes* sizes) { |
0 | 86 int extra_bytes = code_size; |
8031 | 87 if (sizes->compressed_linenumber_size() > 0) { |
88 extra_bytes += sizes->compressed_linenumber_size(); | |
0 | 89 } |
8031 | 90 if (sizes->checked_exceptions_length() > 0) { |
0 | 91 extra_bytes += sizeof(u2); |
8031 | 92 extra_bytes += sizes->checked_exceptions_length() * sizeof(CheckedExceptionElement); |
0 | 93 } |
8031 | 94 if (sizes->localvariable_table_length() > 0) { |
0 | 95 extra_bytes += sizeof(u2); |
96 extra_bytes += | |
8031 | 97 sizes->localvariable_table_length() * sizeof(LocalVariableTableElement); |
0 | 98 } |
8031 | 99 if (sizes->exception_table_length() > 0) { |
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100 extra_bytes += sizeof(u2); |
8031 | 101 extra_bytes += sizes->exception_table_length() * sizeof(ExceptionTableElement); |
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102 } |
8031 | 103 if (sizes->generic_signature_index() != 0) { |
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104 extra_bytes += sizeof(u2); |
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105 } |
8031 | 106 if (sizes->method_parameters_length() > 0) { |
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107 extra_bytes += sizeof(u2); |
8031 | 108 extra_bytes += sizes->method_parameters_length() * sizeof(MethodParametersElement); |
109 } | |
110 | |
111 // Align sizes up to a word. | |
112 extra_bytes = align_size_up(extra_bytes, BytesPerWord); | |
113 | |
114 // One pointer per annotation array | |
115 if (sizes->method_annotations_length() > 0) { | |
116 extra_bytes += sizeof(AnnotationArray*); | |
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117 } |
8031 | 118 if (sizes->parameter_annotations_length() > 0) { |
119 extra_bytes += sizeof(AnnotationArray*); | |
120 } | |
121 if (sizes->type_annotations_length() > 0) { | |
122 extra_bytes += sizeof(AnnotationArray*); | |
123 } | |
124 if (sizes->default_annotations_length() > 0) { | |
125 extra_bytes += sizeof(AnnotationArray*); | |
126 } | |
127 | |
0 | 128 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; |
8031 | 129 assert(extra_words == extra_bytes/BytesPerWord, "should already be aligned"); |
0 | 130 return align_object_size(header_size() + extra_words); |
131 } | |
132 | |
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133 Method* ConstMethod::method() const { |
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134 return _constants->pool_holder()->method_with_idnum(_method_idnum); |
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135 } |
0 | 136 |
137 // linenumber table - note that length is unknown until decompression, | |
138 // see class CompressedLineNumberReadStream. | |
139 | |
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140 u_char* ConstMethod::compressed_linenumber_table() const { |
0 | 141 // Located immediately following the bytecodes. |
142 assert(has_linenumber_table(), "called only if table is present"); | |
143 return code_end(); | |
144 } | |
145 | |
8031 | 146 // Last short in ConstMethod* before annotations |
147 u2* ConstMethod::last_u2_element() const { | |
148 int offset = 0; | |
149 if (has_method_annotations()) offset++; | |
150 if (has_parameter_annotations()) offset++; | |
151 if (has_type_annotations()) offset++; | |
152 if (has_default_annotations()) offset++; | |
153 return (u2*)((AnnotationArray**)constMethod_end() - offset) - 1; | |
154 } | |
155 | |
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156 u2* ConstMethod::generic_signature_index_addr() const { |
0 | 157 // Located at the end of the constMethod. |
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158 assert(has_generic_signature(), "called only if generic signature exists"); |
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159 return last_u2_element(); |
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160 } |
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161 |
8031 | 162 u2* ConstMethod::method_parameters_length_addr() const { |
163 assert(has_method_parameters(), "called only if table is present"); | |
164 return has_generic_signature() ? (last_u2_element() - 1) : | |
165 last_u2_element(); | |
166 } | |
167 | |
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168 u2* ConstMethod::checked_exceptions_length_addr() const { |
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169 // Located immediately before the generic signature index. |
0 | 170 assert(has_checked_exceptions(), "called only if table is present"); |
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171 if(has_method_parameters()) { |
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172 // If method parameters present, locate immediately before them. |
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173 return (u2*)method_parameters_start() - 1; |
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174 } else { |
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175 // Else, the exception table is at the end of the constMethod. |
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176 return has_generic_signature() ? (last_u2_element() - 1) : |
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177 last_u2_element(); |
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178 } |
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179 } |
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180 |
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181 u2* ConstMethod::exception_table_length_addr() const { |
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182 assert(has_exception_handler(), "called only if table is present"); |
0 | 183 if (has_checked_exceptions()) { |
184 // If checked_exception present, locate immediately before them. | |
185 return (u2*) checked_exceptions_start() - 1; | |
186 } else { | |
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187 if(has_method_parameters()) { |
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188 // If method parameters present, locate immediately before them. |
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189 return (u2*)method_parameters_start() - 1; |
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190 } else { |
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191 // Else, the exception table is at the end of the constMethod. |
8031 | 192 return has_generic_signature() ? (last_u2_element() - 1) : |
193 last_u2_element(); | |
194 } | |
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195 } |
0 | 196 } |
197 | |
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198 u2* ConstMethod::localvariable_table_length_addr() const { |
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199 assert(has_localvariable_table(), "called only if table is present"); |
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200 if (has_exception_handler()) { |
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201 // If exception_table present, locate immediately before them. |
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202 return (u2*) exception_table_start() - 1; |
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203 } else { |
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204 if (has_checked_exceptions()) { |
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205 // If checked_exception present, locate immediately before them. |
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206 return (u2*) checked_exceptions_start() - 1; |
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207 } else { |
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208 if(has_method_parameters()) { |
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209 // If method parameters present, locate immediately before them. |
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210 return (u2*)method_parameters_start() - 1; |
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211 } else { |
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212 // Else, the exception table is at the end of the constMethod. |
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213 return has_generic_signature() ? (last_u2_element() - 1) : |
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214 last_u2_element(); |
8031 | 215 } |
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216 } |
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217 } |
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218 } |
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219 |
0 | 220 // Update the flags to indicate the presence of these optional fields. |
8031 | 221 void ConstMethod::set_inlined_tables_length(InlineTableSizes* sizes) { |
222 _flags = 0; | |
223 if (sizes->compressed_linenumber_size() > 0) | |
0 | 224 _flags |= _has_linenumber_table; |
8031 | 225 if (sizes->generic_signature_index() != 0) |
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226 _flags |= _has_generic_signature; |
8031 | 227 if (sizes->method_parameters_length() > 0) |
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228 _flags |= _has_method_parameters; |
8031 | 229 if (sizes->checked_exceptions_length() > 0) |
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230 _flags |= _has_checked_exceptions; |
8031 | 231 if (sizes->exception_table_length() > 0) |
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232 _flags |= _has_exception_table; |
8031 | 233 if (sizes->localvariable_table_length() > 0) |
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234 _flags |= _has_localvariable_table; |
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235 |
8031 | 236 // annotations, they are all pointer sized embedded objects so don't have |
237 // a length embedded also. | |
238 if (sizes->method_annotations_length() > 0) | |
239 _flags |= _has_method_annotations; | |
240 if (sizes->parameter_annotations_length() > 0) | |
241 _flags |= _has_parameter_annotations; | |
242 if (sizes->type_annotations_length() > 0) | |
243 _flags |= _has_type_annotations; | |
244 if (sizes->default_annotations_length() > 0) | |
245 _flags |= _has_default_annotations; | |
246 | |
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247 // This code is extremely brittle and should possibly be revised. |
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248 // The *_length_addr functions walk backwards through the |
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249 // constMethod data, using each of the length indexes ahead of them, |
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250 // as well as the flags variable. Therefore, the indexes must be |
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251 // initialized in reverse order, or else they will compute the wrong |
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252 // offsets. Moving the initialization of _flags into a separate |
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253 // block solves *half* of the problem, but the following part will |
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254 // still break if the order is not exactly right. |
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255 // |
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256 // Also, the servicability agent needs to be informed anytime |
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257 // anything is added here. It might be advisable to have some sort |
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258 // of indication of this inline. |
8031 | 259 if (sizes->generic_signature_index() != 0) |
260 *(generic_signature_index_addr()) = sizes->generic_signature_index(); | |
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261 // New data should probably go here. |
8031 | 262 if (sizes->method_parameters_length() > 0) |
263 *(method_parameters_length_addr()) = sizes->method_parameters_length(); | |
264 if (sizes->checked_exceptions_length() > 0) | |
265 *(checked_exceptions_length_addr()) = sizes->checked_exceptions_length(); | |
266 if (sizes->exception_table_length() > 0) | |
267 *(exception_table_length_addr()) = sizes->exception_table_length(); | |
268 if (sizes->localvariable_table_length() > 0) | |
269 *(localvariable_table_length_addr()) = sizes->localvariable_table_length(); | |
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270 } |
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271 |
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272 int ConstMethod::method_parameters_length() const { |
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273 return has_method_parameters() ? *(method_parameters_length_addr()) : 0; |
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274 } |
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275 |
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276 MethodParametersElement* ConstMethod::method_parameters_start() const { |
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277 u2* addr = method_parameters_length_addr(); |
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278 u2 length = *addr; |
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279 assert(length > 0, "should only be called if table is present"); |
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280 addr -= length * sizeof(MethodParametersElement) / sizeof(u2); |
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281 return (MethodParametersElement*) addr; |
0 | 282 } |
283 | |
284 | |
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285 int ConstMethod::checked_exceptions_length() const { |
0 | 286 return has_checked_exceptions() ? *(checked_exceptions_length_addr()) : 0; |
287 } | |
288 | |
289 | |
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290 CheckedExceptionElement* ConstMethod::checked_exceptions_start() const { |
0 | 291 u2* addr = checked_exceptions_length_addr(); |
292 u2 length = *addr; | |
293 assert(length > 0, "should only be called if table is present"); | |
294 addr -= length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
295 return (CheckedExceptionElement*) addr; | |
296 } | |
297 | |
298 | |
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299 int ConstMethod::localvariable_table_length() const { |
0 | 300 return has_localvariable_table() ? *(localvariable_table_length_addr()) : 0; |
301 } | |
302 | |
303 | |
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304 LocalVariableTableElement* ConstMethod::localvariable_table_start() const { |
0 | 305 u2* addr = localvariable_table_length_addr(); |
306 u2 length = *addr; | |
307 assert(length > 0, "should only be called if table is present"); | |
308 addr -= length * sizeof(LocalVariableTableElement) / sizeof(u2); | |
309 return (LocalVariableTableElement*) addr; | |
310 } | |
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311 |
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312 int ConstMethod::exception_table_length() const { |
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313 return has_exception_handler() ? *(exception_table_length_addr()) : 0; |
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314 } |
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315 |
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316 ExceptionTableElement* ConstMethod::exception_table_start() const { |
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317 u2* addr = exception_table_length_addr(); |
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318 u2 length = *addr; |
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319 assert(length > 0, "should only be called if table is present"); |
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320 addr -= length * sizeof(ExceptionTableElement) / sizeof(u2); |
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321 return (ExceptionTableElement*)addr; |
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322 } |
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323 |
8031 | 324 AnnotationArray** ConstMethod::method_annotations_addr() const { |
325 assert(has_method_annotations(), "should only be called if method annotations are present"); | |
326 return (AnnotationArray**)constMethod_end() - 1; | |
327 } | |
328 | |
329 AnnotationArray** ConstMethod::parameter_annotations_addr() const { | |
330 assert(has_parameter_annotations(), "should only be called if method parameter annotations are present"); | |
331 int offset = 1; | |
332 if (has_method_annotations()) offset++; | |
333 return (AnnotationArray**)constMethod_end() - offset; | |
334 } | |
335 | |
336 AnnotationArray** ConstMethod::type_annotations_addr() const { | |
337 assert(has_type_annotations(), "should only be called if method type annotations are present"); | |
338 int offset = 1; | |
339 if (has_method_annotations()) offset++; | |
340 if (has_parameter_annotations()) offset++; | |
341 return (AnnotationArray**)constMethod_end() - offset; | |
342 } | |
343 | |
344 AnnotationArray** ConstMethod::default_annotations_addr() const { | |
345 assert(has_default_annotations(), "should only be called if method default annotations are present"); | |
346 int offset = 1; | |
347 if (has_method_annotations()) offset++; | |
348 if (has_parameter_annotations()) offset++; | |
349 if (has_type_annotations()) offset++; | |
350 return (AnnotationArray**)constMethod_end() - offset; | |
351 } | |
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352 |
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353 // Printing |
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354 |
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355 void ConstMethod::print_on(outputStream* st) const { |
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356 ResourceMark rm; |
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357 assert(is_constMethod(), "must be constMethod"); |
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358 st->print_cr(internal_name()); |
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359 st->print(" - method: " INTPTR_FORMAT " ", (address)method()); |
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360 method()->print_value_on(st); st->cr(); |
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361 if (has_stackmap_table()) { |
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362 st->print(" - stackmap data: "); |
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363 stackmap_data()->print_value_on(st); |
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364 st->cr(); |
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365 } |
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366 } |
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367 |
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368 // Short version of printing ConstMethod* - just print the name of the |
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369 // method it belongs to. |
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370 void ConstMethod::print_value_on(outputStream* st) const { |
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371 assert(is_constMethod(), "must be constMethod"); |
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372 st->print(" const part of method " ); |
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373 method()->print_value_on(st); |
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374 } |
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375 |
7956 | 376 #if INCLUDE_SERVICES |
377 // Size Statistics | |
378 void ConstMethod::collect_statistics(KlassSizeStats *sz) const { | |
379 int n1, n2, n3; | |
380 sz->_const_method_bytes += (n1 = sz->count(this)); | |
381 sz->_bytecode_bytes += (n2 = code_size()); | |
382 sz->_stackmap_bytes += (n3 = sz->count_array(stackmap_data())); | |
383 | |
8031 | 384 // Count method annotations |
385 int a1 = 0, a2 = 0, a3 = 0, a4 = 0; | |
386 if (has_method_annotations()) { | |
387 sz->_methods_annotations_bytes += (a1 = sz->count_array(method_annotations())); | |
388 } | |
389 if (has_parameter_annotations()) { | |
390 sz->_methods_parameter_annotations_bytes += (a2 = sz->count_array(parameter_annotations())); | |
391 } | |
392 if (has_type_annotations()) { | |
393 sz->_methods_type_annotations_bytes += (a3 = sz->count_array(type_annotations())); | |
394 } | |
395 if (has_default_annotations()) { | |
396 sz->_methods_default_annotations_bytes += (a4 = sz->count_array(default_annotations())); | |
397 } | |
398 | |
399 int size_annotations = a1 + a2 + a3 + a4; | |
400 | |
401 sz->_method_all_bytes += n1 + n3 + size_annotations; // note: n2 is part of n3 | |
402 sz->_ro_bytes += n1 + n3 + size_annotations; | |
7956 | 403 } |
404 #endif // INCLUDE_SERVICES | |
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405 |
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406 // Verification |
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407 |
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408 void ConstMethod::verify_on(outputStream* st) { |
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409 guarantee(is_constMethod(), "object must be constMethod"); |
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410 guarantee(is_metadata(), err_msg("Should be metadata " PTR_FORMAT, this)); |
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411 |
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412 // Verification can occur during oop construction before the method or |
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413 // other fields have been initialized. |
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414 guarantee(method()->is_method(), "should be method"); |
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415 |
8031 | 416 address m_end = (address)((intptr_t) this + size()); |
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417 address compressed_table_start = code_end(); |
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418 guarantee(compressed_table_start <= m_end, "invalid method layout"); |
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419 address compressed_table_end = compressed_table_start; |
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420 // Verify line number table |
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421 if (has_linenumber_table()) { |
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422 CompressedLineNumberReadStream stream(compressed_linenumber_table()); |
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423 while (stream.read_pair()) { |
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424 guarantee(stream.bci() >= 0 && stream.bci() <= code_size(), "invalid bci in line number table"); |
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425 } |
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426 compressed_table_end += stream.position(); |
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427 } |
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428 guarantee(compressed_table_end <= m_end, "invalid method layout"); |
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429 // Verify checked exceptions, exception table and local variable tables |
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430 if (has_method_parameters()) { |
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431 u2* addr = method_parameters_length_addr(); |
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432 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); |
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433 } |
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434 if (has_checked_exceptions()) { |
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435 u2* addr = checked_exceptions_length_addr(); |
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436 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); |
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437 } |
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438 if (has_exception_handler()) { |
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439 u2* addr = exception_table_length_addr(); |
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440 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); |
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441 } |
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442 if (has_localvariable_table()) { |
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443 u2* addr = localvariable_table_length_addr(); |
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444 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); |
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445 } |
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446 // Check compressed_table_end relative to uncompressed_table_start |
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447 u2* uncompressed_table_start; |
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448 if (has_localvariable_table()) { |
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449 uncompressed_table_start = (u2*) localvariable_table_start(); |
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450 } else if (has_exception_handler()) { |
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451 uncompressed_table_start = (u2*) exception_table_start(); |
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452 } else if (has_checked_exceptions()) { |
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453 uncompressed_table_start = (u2*) checked_exceptions_start(); |
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454 } else if (has_method_parameters()) { |
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455 uncompressed_table_start = (u2*) method_parameters_start(); |
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456 } else { |
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457 uncompressed_table_start = (u2*) m_end; |
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458 } |
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459 int gap = (intptr_t) uncompressed_table_start - (intptr_t) compressed_table_end; |
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460 int max_gap = align_object_size(1)*BytesPerWord; |
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461 guarantee(gap >= 0 && gap < max_gap, "invalid method layout"); |
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462 } |