Mercurial > hg > truffle
annotate src/share/vm/oops/constMethod.cpp @ 15177:66e3af78ea96
HSAIL: added safepoint support
Contributed-by: Eric Caspole <eric.caspole@amd.com>
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 17 Apr 2014 00:44:32 +0200 |
parents | e0c9a1d29eb4 |
children | 78bbf4d43a14 |
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 * | |
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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, MetaspaceObj::ConstMethodType, 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); |
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58 set_inlined_tables_length(sizes); // sets _flags |
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 set_name_index(0); |
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62 set_signature_index(0); |
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63 set_constants(NULL); |
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64 set_max_stack(0); |
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65 set_max_locals(0); |
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66 set_method_idnum(0); |
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67 set_size_of_parameters(0); |
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68 } |
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69 |
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70 // Accessor that copies to metadata. |
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71 void ConstMethod::copy_stackmap_data(ClassLoaderData* loader_data, |
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72 u1* sd, int length, TRAPS) { |
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73 _stackmap_data = MetadataFactory::new_array<u1>(loader_data, length, CHECK); |
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74 memcpy((void*)_stackmap_data->adr_at(0), (void*)sd, length); |
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75 } |
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76 |
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77 // Deallocate metadata fields associated with ConstMethod* |
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78 void ConstMethod::deallocate_contents(ClassLoaderData* loader_data) { |
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79 if (stackmap_data() != NULL) { |
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80 MetadataFactory::free_array<u1>(loader_data, stackmap_data()); |
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81 } |
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82 set_stackmap_data(NULL); |
8031 | 83 |
84 // deallocate annotation arrays | |
85 if (has_method_annotations()) | |
86 MetadataFactory::free_array<u1>(loader_data, method_annotations()); | |
87 if (has_parameter_annotations()) | |
88 MetadataFactory::free_array<u1>(loader_data, parameter_annotations()); | |
89 if (has_type_annotations()) | |
90 MetadataFactory::free_array<u1>(loader_data, type_annotations()); | |
91 if (has_default_annotations()) | |
92 MetadataFactory::free_array<u1>(loader_data, default_annotations()); | |
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93 } |
0 | 94 |
95 // How big must this constMethodObject be? | |
96 | |
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97 int ConstMethod::size(int code_size, |
8031 | 98 InlineTableSizes* sizes) { |
0 | 99 int extra_bytes = code_size; |
8031 | 100 if (sizes->compressed_linenumber_size() > 0) { |
101 extra_bytes += sizes->compressed_linenumber_size(); | |
0 | 102 } |
8031 | 103 if (sizes->checked_exceptions_length() > 0) { |
0 | 104 extra_bytes += sizeof(u2); |
8031 | 105 extra_bytes += sizes->checked_exceptions_length() * sizeof(CheckedExceptionElement); |
0 | 106 } |
8031 | 107 if (sizes->localvariable_table_length() > 0) { |
0 | 108 extra_bytes += sizeof(u2); |
109 extra_bytes += | |
8031 | 110 sizes->localvariable_table_length() * sizeof(LocalVariableTableElement); |
0 | 111 } |
8031 | 112 if (sizes->exception_table_length() > 0) { |
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113 extra_bytes += sizeof(u2); |
8031 | 114 extra_bytes += sizes->exception_table_length() * sizeof(ExceptionTableElement); |
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115 } |
8031 | 116 if (sizes->generic_signature_index() != 0) { |
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117 extra_bytes += sizeof(u2); |
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118 } |
8031 | 119 if (sizes->method_parameters_length() > 0) { |
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120 extra_bytes += sizeof(u2); |
8031 | 121 extra_bytes += sizes->method_parameters_length() * sizeof(MethodParametersElement); |
122 } | |
123 | |
124 // Align sizes up to a word. | |
125 extra_bytes = align_size_up(extra_bytes, BytesPerWord); | |
126 | |
127 // One pointer per annotation array | |
128 if (sizes->method_annotations_length() > 0) { | |
129 extra_bytes += sizeof(AnnotationArray*); | |
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130 } |
8031 | 131 if (sizes->parameter_annotations_length() > 0) { |
132 extra_bytes += sizeof(AnnotationArray*); | |
133 } | |
134 if (sizes->type_annotations_length() > 0) { | |
135 extra_bytes += sizeof(AnnotationArray*); | |
136 } | |
137 if (sizes->default_annotations_length() > 0) { | |
138 extra_bytes += sizeof(AnnotationArray*); | |
139 } | |
140 | |
0 | 141 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; |
8031 | 142 assert(extra_words == extra_bytes/BytesPerWord, "should already be aligned"); |
0 | 143 return align_object_size(header_size() + extra_words); |
144 } | |
145 | |
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146 Method* ConstMethod::method() const { |
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147 return _constants->pool_holder()->method_with_idnum(_method_idnum); |
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148 } |
0 | 149 |
150 // linenumber table - note that length is unknown until decompression, | |
151 // see class CompressedLineNumberReadStream. | |
152 | |
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153 u_char* ConstMethod::compressed_linenumber_table() const { |
0 | 154 // Located immediately following the bytecodes. |
155 assert(has_linenumber_table(), "called only if table is present"); | |
156 return code_end(); | |
157 } | |
158 | |
8031 | 159 // Last short in ConstMethod* before annotations |
160 u2* ConstMethod::last_u2_element() const { | |
161 int offset = 0; | |
162 if (has_method_annotations()) offset++; | |
163 if (has_parameter_annotations()) offset++; | |
164 if (has_type_annotations()) offset++; | |
165 if (has_default_annotations()) offset++; | |
166 return (u2*)((AnnotationArray**)constMethod_end() - offset) - 1; | |
167 } | |
168 | |
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169 u2* ConstMethod::generic_signature_index_addr() const { |
0 | 170 // Located at the end of the constMethod. |
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171 assert(has_generic_signature(), "called only if generic signature exists"); |
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172 return last_u2_element(); |
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173 } |
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174 |
8031 | 175 u2* ConstMethod::method_parameters_length_addr() const { |
176 assert(has_method_parameters(), "called only if table is present"); | |
177 return has_generic_signature() ? (last_u2_element() - 1) : | |
178 last_u2_element(); | |
179 } | |
180 | |
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181 u2* ConstMethod::checked_exceptions_length_addr() const { |
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182 // Located immediately before the generic signature index. |
0 | 183 assert(has_checked_exceptions(), "called only if table is present"); |
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184 if(has_method_parameters()) { |
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185 // If method parameters present, locate immediately before them. |
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186 return (u2*)method_parameters_start() - 1; |
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187 } else { |
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188 // Else, the exception table is at the end of the constMethod. |
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189 return has_generic_signature() ? (last_u2_element() - 1) : |
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190 last_u2_element(); |
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191 } |
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192 } |
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193 |
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194 u2* ConstMethod::exception_table_length_addr() const { |
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195 assert(has_exception_handler(), "called only if table is present"); |
0 | 196 if (has_checked_exceptions()) { |
197 // If checked_exception present, locate immediately before them. | |
198 return (u2*) checked_exceptions_start() - 1; | |
199 } else { | |
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200 if(has_method_parameters()) { |
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201 // If method parameters present, locate immediately before them. |
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202 return (u2*)method_parameters_start() - 1; |
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203 } else { |
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204 // Else, the exception table is at the end of the constMethod. |
8031 | 205 return has_generic_signature() ? (last_u2_element() - 1) : |
206 last_u2_element(); | |
207 } | |
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208 } |
0 | 209 } |
210 | |
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211 u2* ConstMethod::localvariable_table_length_addr() const { |
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212 assert(has_localvariable_table(), "called only if table is present"); |
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213 if (has_exception_handler()) { |
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214 // If exception_table present, locate immediately before them. |
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215 return (u2*) exception_table_start() - 1; |
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216 } else { |
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217 if (has_checked_exceptions()) { |
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218 // If checked_exception present, locate immediately before them. |
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219 return (u2*) checked_exceptions_start() - 1; |
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220 } else { |
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221 if(has_method_parameters()) { |
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222 // If method parameters present, locate immediately before them. |
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223 return (u2*)method_parameters_start() - 1; |
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224 } else { |
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225 // Else, the exception table is at the end of the constMethod. |
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226 return has_generic_signature() ? (last_u2_element() - 1) : |
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227 last_u2_element(); |
8031 | 228 } |
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229 } |
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230 } |
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231 } |
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232 |
0 | 233 // Update the flags to indicate the presence of these optional fields. |
8031 | 234 void ConstMethod::set_inlined_tables_length(InlineTableSizes* sizes) { |
235 _flags = 0; | |
236 if (sizes->compressed_linenumber_size() > 0) | |
0 | 237 _flags |= _has_linenumber_table; |
8031 | 238 if (sizes->generic_signature_index() != 0) |
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239 _flags |= _has_generic_signature; |
8031 | 240 if (sizes->method_parameters_length() > 0) |
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241 _flags |= _has_method_parameters; |
8031 | 242 if (sizes->checked_exceptions_length() > 0) |
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243 _flags |= _has_checked_exceptions; |
8031 | 244 if (sizes->exception_table_length() > 0) |
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245 _flags |= _has_exception_table; |
8031 | 246 if (sizes->localvariable_table_length() > 0) |
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247 _flags |= _has_localvariable_table; |
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248 |
8031 | 249 // annotations, they are all pointer sized embedded objects so don't have |
250 // a length embedded also. | |
251 if (sizes->method_annotations_length() > 0) | |
252 _flags |= _has_method_annotations; | |
253 if (sizes->parameter_annotations_length() > 0) | |
254 _flags |= _has_parameter_annotations; | |
255 if (sizes->type_annotations_length() > 0) | |
256 _flags |= _has_type_annotations; | |
257 if (sizes->default_annotations_length() > 0) | |
258 _flags |= _has_default_annotations; | |
259 | |
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260 // This code is extremely brittle and should possibly be revised. |
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261 // The *_length_addr functions walk backwards through the |
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262 // constMethod data, using each of the length indexes ahead of them, |
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263 // as well as the flags variable. Therefore, the indexes must be |
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264 // initialized in reverse order, or else they will compute the wrong |
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265 // offsets. Moving the initialization of _flags into a separate |
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266 // block solves *half* of the problem, but the following part will |
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267 // still break if the order is not exactly right. |
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268 // |
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269 // Also, the servicability agent needs to be informed anytime |
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270 // anything is added here. It might be advisable to have some sort |
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271 // of indication of this inline. |
8031 | 272 if (sizes->generic_signature_index() != 0) |
273 *(generic_signature_index_addr()) = sizes->generic_signature_index(); | |
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274 // New data should probably go here. |
8031 | 275 if (sizes->method_parameters_length() > 0) |
276 *(method_parameters_length_addr()) = sizes->method_parameters_length(); | |
277 if (sizes->checked_exceptions_length() > 0) | |
278 *(checked_exceptions_length_addr()) = sizes->checked_exceptions_length(); | |
279 if (sizes->exception_table_length() > 0) | |
280 *(exception_table_length_addr()) = sizes->exception_table_length(); | |
281 if (sizes->localvariable_table_length() > 0) | |
282 *(localvariable_table_length_addr()) = sizes->localvariable_table_length(); | |
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283 } |
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284 |
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285 int ConstMethod::method_parameters_length() const { |
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286 return has_method_parameters() ? *(method_parameters_length_addr()) : 0; |
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287 } |
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288 |
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289 MethodParametersElement* ConstMethod::method_parameters_start() const { |
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290 u2* addr = method_parameters_length_addr(); |
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291 u2 length = *addr; |
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292 assert(length > 0, "should only be called if table is present"); |
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293 addr -= length * sizeof(MethodParametersElement) / sizeof(u2); |
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294 return (MethodParametersElement*) addr; |
0 | 295 } |
296 | |
297 | |
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298 int ConstMethod::checked_exceptions_length() const { |
0 | 299 return has_checked_exceptions() ? *(checked_exceptions_length_addr()) : 0; |
300 } | |
301 | |
302 | |
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303 CheckedExceptionElement* ConstMethod::checked_exceptions_start() const { |
0 | 304 u2* addr = checked_exceptions_length_addr(); |
305 u2 length = *addr; | |
306 assert(length > 0, "should only be called if table is present"); | |
307 addr -= length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
308 return (CheckedExceptionElement*) addr; | |
309 } | |
310 | |
311 | |
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312 int ConstMethod::localvariable_table_length() const { |
0 | 313 return has_localvariable_table() ? *(localvariable_table_length_addr()) : 0; |
314 } | |
315 | |
316 | |
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317 LocalVariableTableElement* ConstMethod::localvariable_table_start() const { |
0 | 318 u2* addr = localvariable_table_length_addr(); |
319 u2 length = *addr; | |
320 assert(length > 0, "should only be called if table is present"); | |
321 addr -= length * sizeof(LocalVariableTableElement) / sizeof(u2); | |
322 return (LocalVariableTableElement*) addr; | |
323 } | |
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324 |
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325 int ConstMethod::exception_table_length() const { |
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326 return has_exception_handler() ? *(exception_table_length_addr()) : 0; |
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327 } |
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328 |
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329 ExceptionTableElement* ConstMethod::exception_table_start() const { |
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330 u2* addr = exception_table_length_addr(); |
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331 u2 length = *addr; |
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332 assert(length > 0, "should only be called if table is present"); |
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333 addr -= length * sizeof(ExceptionTableElement) / sizeof(u2); |
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334 return (ExceptionTableElement*)addr; |
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335 } |
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336 |
8031 | 337 AnnotationArray** ConstMethod::method_annotations_addr() const { |
338 assert(has_method_annotations(), "should only be called if method annotations are present"); | |
339 return (AnnotationArray**)constMethod_end() - 1; | |
340 } | |
341 | |
342 AnnotationArray** ConstMethod::parameter_annotations_addr() const { | |
343 assert(has_parameter_annotations(), "should only be called if method parameter annotations are present"); | |
344 int offset = 1; | |
345 if (has_method_annotations()) offset++; | |
346 return (AnnotationArray**)constMethod_end() - offset; | |
347 } | |
348 | |
349 AnnotationArray** ConstMethod::type_annotations_addr() const { | |
350 assert(has_type_annotations(), "should only be called if method type annotations are present"); | |
351 int offset = 1; | |
352 if (has_method_annotations()) offset++; | |
353 if (has_parameter_annotations()) offset++; | |
354 return (AnnotationArray**)constMethod_end() - offset; | |
355 } | |
356 | |
357 AnnotationArray** ConstMethod::default_annotations_addr() const { | |
358 assert(has_default_annotations(), "should only be called if method default annotations are present"); | |
359 int offset = 1; | |
360 if (has_method_annotations()) offset++; | |
361 if (has_parameter_annotations()) offset++; | |
362 if (has_type_annotations()) offset++; | |
363 return (AnnotationArray**)constMethod_end() - offset; | |
364 } | |
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365 |
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366 // copy annotations from 'cm' to 'this' |
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367 void ConstMethod::copy_annotations_from(ConstMethod* cm) { |
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368 if (cm->has_method_annotations()) { |
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369 assert(has_method_annotations(), "should be allocated already"); |
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370 set_method_annotations(cm->method_annotations()); |
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371 } |
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372 if (cm->has_parameter_annotations()) { |
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373 assert(has_parameter_annotations(), "should be allocated already"); |
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374 set_parameter_annotations(cm->parameter_annotations()); |
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375 } |
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376 if (cm->has_type_annotations()) { |
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377 assert(has_type_annotations(), "should be allocated already"); |
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378 set_type_annotations(cm->type_annotations()); |
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379 } |
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380 if (cm->has_default_annotations()) { |
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381 assert(has_default_annotations(), "should be allocated already"); |
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382 set_default_annotations(cm->default_annotations()); |
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383 } |
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384 } |
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385 |
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386 // Printing |
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387 |
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388 void ConstMethod::print_on(outputStream* st) const { |
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389 ResourceMark rm; |
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390 assert(is_constMethod(), "must be constMethod"); |
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391 st->print_cr(internal_name()); |
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392 st->print(" - method: " INTPTR_FORMAT " ", (address)method()); |
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393 method()->print_value_on(st); st->cr(); |
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394 if (has_stackmap_table()) { |
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395 st->print(" - stackmap data: "); |
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396 stackmap_data()->print_value_on(st); |
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397 st->cr(); |
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398 } |
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399 } |
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400 |
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401 // Short version of printing ConstMethod* - just print the name of the |
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402 // method it belongs to. |
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403 void ConstMethod::print_value_on(outputStream* st) const { |
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404 assert(is_constMethod(), "must be constMethod"); |
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405 st->print(" const part of method " ); |
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406 method()->print_value_on(st); |
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407 } |
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408 |
7956 | 409 #if INCLUDE_SERVICES |
410 // Size Statistics | |
411 void ConstMethod::collect_statistics(KlassSizeStats *sz) const { | |
412 int n1, n2, n3; | |
413 sz->_const_method_bytes += (n1 = sz->count(this)); | |
414 sz->_bytecode_bytes += (n2 = code_size()); | |
415 sz->_stackmap_bytes += (n3 = sz->count_array(stackmap_data())); | |
416 | |
8031 | 417 // Count method annotations |
418 int a1 = 0, a2 = 0, a3 = 0, a4 = 0; | |
419 if (has_method_annotations()) { | |
420 sz->_methods_annotations_bytes += (a1 = sz->count_array(method_annotations())); | |
421 } | |
422 if (has_parameter_annotations()) { | |
423 sz->_methods_parameter_annotations_bytes += (a2 = sz->count_array(parameter_annotations())); | |
424 } | |
425 if (has_type_annotations()) { | |
426 sz->_methods_type_annotations_bytes += (a3 = sz->count_array(type_annotations())); | |
427 } | |
428 if (has_default_annotations()) { | |
429 sz->_methods_default_annotations_bytes += (a4 = sz->count_array(default_annotations())); | |
430 } | |
431 | |
432 int size_annotations = a1 + a2 + a3 + a4; | |
433 | |
434 sz->_method_all_bytes += n1 + n3 + size_annotations; // note: n2 is part of n3 | |
435 sz->_ro_bytes += n1 + n3 + size_annotations; | |
7956 | 436 } |
437 #endif // INCLUDE_SERVICES | |
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438 |
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439 // Verification |
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440 |
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441 void ConstMethod::verify_on(outputStream* st) { |
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442 guarantee(is_constMethod(), "object must be constMethod"); |
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443 |
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444 // Verification can occur during oop construction before the method or |
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445 // other fields have been initialized. |
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446 guarantee(method()->is_method(), "should be method"); |
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447 |
8031 | 448 address m_end = (address)((intptr_t) this + size()); |
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449 address compressed_table_start = code_end(); |
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450 guarantee(compressed_table_start <= m_end, "invalid method layout"); |
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451 address compressed_table_end = compressed_table_start; |
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452 // Verify line number table |
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453 if (has_linenumber_table()) { |
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454 CompressedLineNumberReadStream stream(compressed_linenumber_table()); |
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455 while (stream.read_pair()) { |
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456 guarantee(stream.bci() >= 0 && stream.bci() <= code_size(), "invalid bci in line number table"); |
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457 } |
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458 compressed_table_end += stream.position(); |
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459 } |
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460 guarantee(compressed_table_end <= m_end, "invalid method layout"); |
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461 // Verify checked exceptions, exception table and local variable tables |
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462 if (has_method_parameters()) { |
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463 u2* addr = method_parameters_length_addr(); |
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464 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); |
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465 } |
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466 if (has_checked_exceptions()) { |
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467 u2* addr = checked_exceptions_length_addr(); |
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468 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); |
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469 } |
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470 if (has_exception_handler()) { |
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471 u2* addr = exception_table_length_addr(); |
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472 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); |
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473 } |
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474 if (has_localvariable_table()) { |
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475 u2* addr = localvariable_table_length_addr(); |
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476 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); |
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477 } |
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478 // Check compressed_table_end relative to uncompressed_table_start |
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479 u2* uncompressed_table_start; |
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480 if (has_localvariable_table()) { |
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481 uncompressed_table_start = (u2*) localvariable_table_start(); |
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482 } else if (has_exception_handler()) { |
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483 uncompressed_table_start = (u2*) exception_table_start(); |
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484 } else if (has_checked_exceptions()) { |
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485 uncompressed_table_start = (u2*) checked_exceptions_start(); |
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486 } else if (has_method_parameters()) { |
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487 uncompressed_table_start = (u2*) method_parameters_start(); |
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488 } else { |
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489 uncompressed_table_start = (u2*) m_end; |
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490 } |
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491 int gap = (intptr_t) uncompressed_table_start - (intptr_t) compressed_table_end; |
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492 int max_gap = align_object_size(1)*BytesPerWord; |
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493 guarantee(gap >= 0 && gap < max_gap, "invalid method layout"); |
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494 } |