Mercurial > hg > graal-compiler
annotate src/share/vm/oops/constMethod.cpp @ 8715:5939f5953b45
8009836: nsk/regression/b4222717 fails with empty stack trace
Summary: Some zeroing was missed for bug 8003553, causing empty stack traces and Xcom crashes, add back zeroing to metablock
Reviewed-by: dholmes, rbackman
author | coleenp |
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date | Wed, 13 Mar 2013 09:10:35 -0400 |
parents | 3efdfd6ddbf2 |
children | c8b31b461e1a |
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); |
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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 |
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71 // Deallocate metadata fields associated with ConstMethod* |
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72 void ConstMethod::deallocate_contents(ClassLoaderData* loader_data) { |
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73 if (stackmap_data() != NULL) { |
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74 MetadataFactory::free_array<u1>(loader_data, stackmap_data()); |
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75 } |
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76 set_stackmap_data(NULL); |
8031 | 77 |
78 // deallocate annotation arrays | |
79 if (has_method_annotations()) | |
80 MetadataFactory::free_array<u1>(loader_data, method_annotations()); | |
81 if (has_parameter_annotations()) | |
82 MetadataFactory::free_array<u1>(loader_data, parameter_annotations()); | |
83 if (has_type_annotations()) | |
84 MetadataFactory::free_array<u1>(loader_data, type_annotations()); | |
85 if (has_default_annotations()) | |
86 MetadataFactory::free_array<u1>(loader_data, default_annotations()); | |
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87 } |
0 | 88 |
89 // How big must this constMethodObject be? | |
90 | |
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91 int ConstMethod::size(int code_size, |
8031 | 92 InlineTableSizes* sizes) { |
0 | 93 int extra_bytes = code_size; |
8031 | 94 if (sizes->compressed_linenumber_size() > 0) { |
95 extra_bytes += sizes->compressed_linenumber_size(); | |
0 | 96 } |
8031 | 97 if (sizes->checked_exceptions_length() > 0) { |
0 | 98 extra_bytes += sizeof(u2); |
8031 | 99 extra_bytes += sizes->checked_exceptions_length() * sizeof(CheckedExceptionElement); |
0 | 100 } |
8031 | 101 if (sizes->localvariable_table_length() > 0) { |
0 | 102 extra_bytes += sizeof(u2); |
103 extra_bytes += | |
8031 | 104 sizes->localvariable_table_length() * sizeof(LocalVariableTableElement); |
0 | 105 } |
8031 | 106 if (sizes->exception_table_length() > 0) { |
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107 extra_bytes += sizeof(u2); |
8031 | 108 extra_bytes += sizes->exception_table_length() * sizeof(ExceptionTableElement); |
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109 } |
8031 | 110 if (sizes->generic_signature_index() != 0) { |
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111 extra_bytes += sizeof(u2); |
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112 } |
8031 | 113 if (sizes->method_parameters_length() > 0) { |
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114 extra_bytes += sizeof(u2); |
8031 | 115 extra_bytes += sizes->method_parameters_length() * sizeof(MethodParametersElement); |
116 } | |
117 | |
118 // Align sizes up to a word. | |
119 extra_bytes = align_size_up(extra_bytes, BytesPerWord); | |
120 | |
121 // One pointer per annotation array | |
122 if (sizes->method_annotations_length() > 0) { | |
123 extra_bytes += sizeof(AnnotationArray*); | |
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124 } |
8031 | 125 if (sizes->parameter_annotations_length() > 0) { |
126 extra_bytes += sizeof(AnnotationArray*); | |
127 } | |
128 if (sizes->type_annotations_length() > 0) { | |
129 extra_bytes += sizeof(AnnotationArray*); | |
130 } | |
131 if (sizes->default_annotations_length() > 0) { | |
132 extra_bytes += sizeof(AnnotationArray*); | |
133 } | |
134 | |
0 | 135 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; |
8031 | 136 assert(extra_words == extra_bytes/BytesPerWord, "should already be aligned"); |
0 | 137 return align_object_size(header_size() + extra_words); |
138 } | |
139 | |
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140 Method* ConstMethod::method() const { |
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141 return _constants->pool_holder()->method_with_idnum(_method_idnum); |
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142 } |
0 | 143 |
144 // linenumber table - note that length is unknown until decompression, | |
145 // see class CompressedLineNumberReadStream. | |
146 | |
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147 u_char* ConstMethod::compressed_linenumber_table() const { |
0 | 148 // Located immediately following the bytecodes. |
149 assert(has_linenumber_table(), "called only if table is present"); | |
150 return code_end(); | |
151 } | |
152 | |
8031 | 153 // Last short in ConstMethod* before annotations |
154 u2* ConstMethod::last_u2_element() const { | |
155 int offset = 0; | |
156 if (has_method_annotations()) offset++; | |
157 if (has_parameter_annotations()) offset++; | |
158 if (has_type_annotations()) offset++; | |
159 if (has_default_annotations()) offset++; | |
160 return (u2*)((AnnotationArray**)constMethod_end() - offset) - 1; | |
161 } | |
162 | |
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163 u2* ConstMethod::generic_signature_index_addr() const { |
0 | 164 // Located at the end of the constMethod. |
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165 assert(has_generic_signature(), "called only if generic signature exists"); |
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166 return last_u2_element(); |
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167 } |
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168 |
8031 | 169 u2* ConstMethod::method_parameters_length_addr() const { |
170 assert(has_method_parameters(), "called only if table is present"); | |
171 return has_generic_signature() ? (last_u2_element() - 1) : | |
172 last_u2_element(); | |
173 } | |
174 | |
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175 u2* ConstMethod::checked_exceptions_length_addr() const { |
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176 // Located immediately before the generic signature index. |
0 | 177 assert(has_checked_exceptions(), "called only if table is present"); |
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178 if(has_method_parameters()) { |
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179 // If method parameters present, locate immediately before them. |
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180 return (u2*)method_parameters_start() - 1; |
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181 } else { |
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182 // Else, the exception table is at the end of the constMethod. |
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183 return has_generic_signature() ? (last_u2_element() - 1) : |
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184 last_u2_element(); |
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185 } |
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186 } |
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187 |
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188 u2* ConstMethod::exception_table_length_addr() const { |
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189 assert(has_exception_handler(), "called only if table is present"); |
0 | 190 if (has_checked_exceptions()) { |
191 // If checked_exception present, locate immediately before them. | |
192 return (u2*) checked_exceptions_start() - 1; | |
193 } else { | |
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194 if(has_method_parameters()) { |
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195 // If method parameters present, locate immediately before them. |
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196 return (u2*)method_parameters_start() - 1; |
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197 } else { |
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198 // Else, the exception table is at the end of the constMethod. |
8031 | 199 return has_generic_signature() ? (last_u2_element() - 1) : |
200 last_u2_element(); | |
201 } | |
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202 } |
0 | 203 } |
204 | |
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205 u2* ConstMethod::localvariable_table_length_addr() const { |
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206 assert(has_localvariable_table(), "called only if table is present"); |
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207 if (has_exception_handler()) { |
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208 // If exception_table present, locate immediately before them. |
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209 return (u2*) exception_table_start() - 1; |
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210 } else { |
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211 if (has_checked_exceptions()) { |
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212 // If checked_exception present, locate immediately before them. |
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213 return (u2*) checked_exceptions_start() - 1; |
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214 } else { |
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215 if(has_method_parameters()) { |
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216 // If method parameters present, locate immediately before them. |
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217 return (u2*)method_parameters_start() - 1; |
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218 } else { |
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219 // Else, the exception table is at the end of the constMethod. |
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220 return has_generic_signature() ? (last_u2_element() - 1) : |
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221 last_u2_element(); |
8031 | 222 } |
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223 } |
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224 } |
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225 } |
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226 |
0 | 227 // Update the flags to indicate the presence of these optional fields. |
8031 | 228 void ConstMethod::set_inlined_tables_length(InlineTableSizes* sizes) { |
229 _flags = 0; | |
230 if (sizes->compressed_linenumber_size() > 0) | |
0 | 231 _flags |= _has_linenumber_table; |
8031 | 232 if (sizes->generic_signature_index() != 0) |
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233 _flags |= _has_generic_signature; |
8031 | 234 if (sizes->method_parameters_length() > 0) |
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235 _flags |= _has_method_parameters; |
8031 | 236 if (sizes->checked_exceptions_length() > 0) |
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237 _flags |= _has_checked_exceptions; |
8031 | 238 if (sizes->exception_table_length() > 0) |
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239 _flags |= _has_exception_table; |
8031 | 240 if (sizes->localvariable_table_length() > 0) |
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241 _flags |= _has_localvariable_table; |
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242 |
8031 | 243 // annotations, they are all pointer sized embedded objects so don't have |
244 // a length embedded also. | |
245 if (sizes->method_annotations_length() > 0) | |
246 _flags |= _has_method_annotations; | |
247 if (sizes->parameter_annotations_length() > 0) | |
248 _flags |= _has_parameter_annotations; | |
249 if (sizes->type_annotations_length() > 0) | |
250 _flags |= _has_type_annotations; | |
251 if (sizes->default_annotations_length() > 0) | |
252 _flags |= _has_default_annotations; | |
253 | |
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254 // This code is extremely brittle and should possibly be revised. |
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255 // The *_length_addr functions walk backwards through the |
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256 // constMethod data, using each of the length indexes ahead of them, |
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257 // as well as the flags variable. Therefore, the indexes must be |
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258 // initialized in reverse order, or else they will compute the wrong |
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259 // offsets. Moving the initialization of _flags into a separate |
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260 // block solves *half* of the problem, but the following part will |
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261 // still break if the order is not exactly right. |
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262 // |
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263 // Also, the servicability agent needs to be informed anytime |
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264 // anything is added here. It might be advisable to have some sort |
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265 // of indication of this inline. |
8031 | 266 if (sizes->generic_signature_index() != 0) |
267 *(generic_signature_index_addr()) = sizes->generic_signature_index(); | |
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268 // New data should probably go here. |
8031 | 269 if (sizes->method_parameters_length() > 0) |
270 *(method_parameters_length_addr()) = sizes->method_parameters_length(); | |
271 if (sizes->checked_exceptions_length() > 0) | |
272 *(checked_exceptions_length_addr()) = sizes->checked_exceptions_length(); | |
273 if (sizes->exception_table_length() > 0) | |
274 *(exception_table_length_addr()) = sizes->exception_table_length(); | |
275 if (sizes->localvariable_table_length() > 0) | |
276 *(localvariable_table_length_addr()) = sizes->localvariable_table_length(); | |
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277 } |
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278 |
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279 int ConstMethod::method_parameters_length() const { |
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280 return has_method_parameters() ? *(method_parameters_length_addr()) : 0; |
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281 } |
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282 |
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283 MethodParametersElement* ConstMethod::method_parameters_start() const { |
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284 u2* addr = method_parameters_length_addr(); |
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285 u2 length = *addr; |
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286 assert(length > 0, "should only be called if table is present"); |
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287 addr -= length * sizeof(MethodParametersElement) / sizeof(u2); |
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288 return (MethodParametersElement*) addr; |
0 | 289 } |
290 | |
291 | |
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292 int ConstMethod::checked_exceptions_length() const { |
0 | 293 return has_checked_exceptions() ? *(checked_exceptions_length_addr()) : 0; |
294 } | |
295 | |
296 | |
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297 CheckedExceptionElement* ConstMethod::checked_exceptions_start() const { |
0 | 298 u2* addr = checked_exceptions_length_addr(); |
299 u2 length = *addr; | |
300 assert(length > 0, "should only be called if table is present"); | |
301 addr -= length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
302 return (CheckedExceptionElement*) addr; | |
303 } | |
304 | |
305 | |
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306 int ConstMethod::localvariable_table_length() const { |
0 | 307 return has_localvariable_table() ? *(localvariable_table_length_addr()) : 0; |
308 } | |
309 | |
310 | |
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311 LocalVariableTableElement* ConstMethod::localvariable_table_start() const { |
0 | 312 u2* addr = localvariable_table_length_addr(); |
313 u2 length = *addr; | |
314 assert(length > 0, "should only be called if table is present"); | |
315 addr -= length * sizeof(LocalVariableTableElement) / sizeof(u2); | |
316 return (LocalVariableTableElement*) addr; | |
317 } | |
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318 |
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319 int ConstMethod::exception_table_length() const { |
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320 return has_exception_handler() ? *(exception_table_length_addr()) : 0; |
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321 } |
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322 |
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323 ExceptionTableElement* ConstMethod::exception_table_start() const { |
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324 u2* addr = exception_table_length_addr(); |
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325 u2 length = *addr; |
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326 assert(length > 0, "should only be called if table is present"); |
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327 addr -= length * sizeof(ExceptionTableElement) / sizeof(u2); |
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328 return (ExceptionTableElement*)addr; |
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329 } |
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330 |
8031 | 331 AnnotationArray** ConstMethod::method_annotations_addr() const { |
332 assert(has_method_annotations(), "should only be called if method annotations are present"); | |
333 return (AnnotationArray**)constMethod_end() - 1; | |
334 } | |
335 | |
336 AnnotationArray** ConstMethod::parameter_annotations_addr() const { | |
337 assert(has_parameter_annotations(), "should only be called if method parameter annotations are present"); | |
338 int offset = 1; | |
339 if (has_method_annotations()) offset++; | |
340 return (AnnotationArray**)constMethod_end() - offset; | |
341 } | |
342 | |
343 AnnotationArray** ConstMethod::type_annotations_addr() const { | |
344 assert(has_type_annotations(), "should only be called if method type annotations are present"); | |
345 int offset = 1; | |
346 if (has_method_annotations()) offset++; | |
347 if (has_parameter_annotations()) offset++; | |
348 return (AnnotationArray**)constMethod_end() - offset; | |
349 } | |
350 | |
351 AnnotationArray** ConstMethod::default_annotations_addr() const { | |
352 assert(has_default_annotations(), "should only be called if method default annotations are present"); | |
353 int offset = 1; | |
354 if (has_method_annotations()) offset++; | |
355 if (has_parameter_annotations()) offset++; | |
356 if (has_type_annotations()) offset++; | |
357 return (AnnotationArray**)constMethod_end() - offset; | |
358 } | |
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359 |
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360 // Printing |
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361 |
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362 void ConstMethod::print_on(outputStream* st) const { |
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363 ResourceMark rm; |
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364 assert(is_constMethod(), "must be constMethod"); |
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365 st->print_cr(internal_name()); |
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366 st->print(" - method: " INTPTR_FORMAT " ", (address)method()); |
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367 method()->print_value_on(st); st->cr(); |
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368 if (has_stackmap_table()) { |
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369 st->print(" - stackmap data: "); |
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370 stackmap_data()->print_value_on(st); |
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371 st->cr(); |
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372 } |
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373 } |
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374 |
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375 // Short version of printing ConstMethod* - just print the name of the |
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376 // method it belongs to. |
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377 void ConstMethod::print_value_on(outputStream* st) const { |
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378 assert(is_constMethod(), "must be constMethod"); |
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379 st->print(" const part of method " ); |
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380 method()->print_value_on(st); |
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381 } |
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382 |
7956 | 383 #if INCLUDE_SERVICES |
384 // Size Statistics | |
385 void ConstMethod::collect_statistics(KlassSizeStats *sz) const { | |
386 int n1, n2, n3; | |
387 sz->_const_method_bytes += (n1 = sz->count(this)); | |
388 sz->_bytecode_bytes += (n2 = code_size()); | |
389 sz->_stackmap_bytes += (n3 = sz->count_array(stackmap_data())); | |
390 | |
8031 | 391 // Count method annotations |
392 int a1 = 0, a2 = 0, a3 = 0, a4 = 0; | |
393 if (has_method_annotations()) { | |
394 sz->_methods_annotations_bytes += (a1 = sz->count_array(method_annotations())); | |
395 } | |
396 if (has_parameter_annotations()) { | |
397 sz->_methods_parameter_annotations_bytes += (a2 = sz->count_array(parameter_annotations())); | |
398 } | |
399 if (has_type_annotations()) { | |
400 sz->_methods_type_annotations_bytes += (a3 = sz->count_array(type_annotations())); | |
401 } | |
402 if (has_default_annotations()) { | |
403 sz->_methods_default_annotations_bytes += (a4 = sz->count_array(default_annotations())); | |
404 } | |
405 | |
406 int size_annotations = a1 + a2 + a3 + a4; | |
407 | |
408 sz->_method_all_bytes += n1 + n3 + size_annotations; // note: n2 is part of n3 | |
409 sz->_ro_bytes += n1 + n3 + size_annotations; | |
7956 | 410 } |
411 #endif // INCLUDE_SERVICES | |
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412 |
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413 // Verification |
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414 |
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415 void ConstMethod::verify_on(outputStream* st) { |
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416 guarantee(is_constMethod(), "object must be constMethod"); |
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417 guarantee(is_metadata(), err_msg("Should be metadata " PTR_FORMAT, this)); |
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418 |
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419 // Verification can occur during oop construction before the method or |
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420 // other fields have been initialized. |
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421 guarantee(method()->is_method(), "should be method"); |
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422 |
8031 | 423 address m_end = (address)((intptr_t) this + size()); |
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424 address compressed_table_start = code_end(); |
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425 guarantee(compressed_table_start <= m_end, "invalid method layout"); |
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426 address compressed_table_end = compressed_table_start; |
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427 // Verify line number table |
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428 if (has_linenumber_table()) { |
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429 CompressedLineNumberReadStream stream(compressed_linenumber_table()); |
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430 while (stream.read_pair()) { |
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431 guarantee(stream.bci() >= 0 && stream.bci() <= code_size(), "invalid bci in line number table"); |
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432 } |
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433 compressed_table_end += stream.position(); |
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434 } |
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435 guarantee(compressed_table_end <= m_end, "invalid method layout"); |
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436 // Verify checked exceptions, exception table and local variable tables |
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437 if (has_method_parameters()) { |
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438 u2* addr = method_parameters_length_addr(); |
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439 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); |
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440 } |
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441 if (has_checked_exceptions()) { |
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442 u2* addr = checked_exceptions_length_addr(); |
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443 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); |
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444 } |
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445 if (has_exception_handler()) { |
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446 u2* addr = exception_table_length_addr(); |
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447 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); |
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448 } |
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449 if (has_localvariable_table()) { |
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450 u2* addr = localvariable_table_length_addr(); |
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451 guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); |
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452 } |
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453 // Check compressed_table_end relative to uncompressed_table_start |
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454 u2* uncompressed_table_start; |
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455 if (has_localvariable_table()) { |
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456 uncompressed_table_start = (u2*) localvariable_table_start(); |
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457 } else if (has_exception_handler()) { |
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458 uncompressed_table_start = (u2*) exception_table_start(); |
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459 } else if (has_checked_exceptions()) { |
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460 uncompressed_table_start = (u2*) checked_exceptions_start(); |
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461 } else if (has_method_parameters()) { |
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462 uncompressed_table_start = (u2*) method_parameters_start(); |
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463 } else { |
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464 uncompressed_table_start = (u2*) m_end; |
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465 } |
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466 int gap = (intptr_t) uncompressed_table_start - (intptr_t) compressed_table_end; |
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467 int max_gap = align_object_size(1)*BytesPerWord; |
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468 guarantee(gap >= 0 && gap < max_gap, "invalid method layout"); |
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469 } |