Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiClassFileReconstituter.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | e74da3c2b827 |
| children | 1cb8583c3da8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2005, 2012, 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" |
| 26 #include "classfile/symbolTable.hpp" | |
| 27 #include "interpreter/bytecodeStream.hpp" | |
| 3938 | 28 #include "oops/fieldStreams.hpp" |
| 1972 | 29 #include "prims/jvmtiClassFileReconstituter.hpp" |
| 30 #include "runtime/signature.hpp" | |
| 31 #ifdef TARGET_ARCH_x86 | |
| 32 # include "bytes_x86.hpp" | |
| 33 #endif | |
| 34 #ifdef TARGET_ARCH_sparc | |
| 35 # include "bytes_sparc.hpp" | |
| 36 #endif | |
| 37 #ifdef TARGET_ARCH_zero | |
| 38 # include "bytes_zero.hpp" | |
| 39 #endif | |
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40 #ifdef TARGET_ARCH_arm |
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41 # include "bytes_arm.hpp" |
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42 #endif |
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43 #ifdef TARGET_ARCH_ppc |
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44 # include "bytes_ppc.hpp" |
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45 #endif |
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46 // FIXME: add Deprecated, LVTT attributes |
| 0 | 47 // FIXME: fix Synthetic attribute |
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48 // FIXME: per Serguei, add error return handling for ConstantPool::copy_cpool_bytes() |
| 0 | 49 |
| 50 | |
| 51 // Write the field information portion of ClassFile structure | |
| 52 // JVMSpec| u2 fields_count; | |
| 53 // JVMSpec| field_info fields[fields_count]; | |
| 54 void JvmtiClassFileReconstituter::write_field_infos() { | |
| 55 HandleMark hm(thread()); | |
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56 Array<AnnotationArray*>* fields_anno = ikh()->fields_annotations(); |
| 0 | 57 |
| 3938 | 58 // Compute the real number of Java fields |
| 59 int java_fields = ikh()->java_fields_count(); | |
| 60 | |
| 3944 | 61 write_u2(java_fields); |
| 3938 | 62 for (JavaFieldStream fs(ikh()); !fs.done(); fs.next()) { |
| 63 AccessFlags access_flags = fs.access_flags(); | |
| 64 int name_index = fs.name_index(); | |
| 65 int signature_index = fs.signature_index(); | |
| 66 int initial_value_index = fs.initval_index(); | |
| 0 | 67 guarantee(name_index != 0 && signature_index != 0, "bad constant pool index for field"); |
| 3938 | 68 // int offset = ikh()->field_offset( index ); |
| 69 int generic_signature_index = fs.generic_signature_index(); | |
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70 AnnotationArray* anno = fields_anno == NULL ? NULL : fields_anno->at(fs.index()); |
| 0 | 71 |
| 72 // JVMSpec| field_info { | |
| 73 // JVMSpec| u2 access_flags; | |
| 74 // JVMSpec| u2 name_index; | |
| 75 // JVMSpec| u2 descriptor_index; | |
| 76 // JVMSpec| u2 attributes_count; | |
| 77 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 78 // JVMSpec| } | |
| 79 | |
| 3938 | 80 write_u2(access_flags.as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); |
| 0 | 81 write_u2(name_index); |
| 82 write_u2(signature_index); | |
| 83 int attr_count = 0; | |
| 84 if (initial_value_index != 0) { | |
| 85 ++attr_count; | |
| 86 } | |
| 87 if (access_flags.is_synthetic()) { | |
| 88 // ++attr_count; | |
| 89 } | |
| 90 if (generic_signature_index != 0) { | |
| 91 ++attr_count; | |
| 92 } | |
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93 if (anno != NULL) { |
| 0 | 94 ++attr_count; // has RuntimeVisibleAnnotations attribute |
| 95 } | |
| 96 | |
| 97 write_u2(attr_count); | |
| 98 | |
| 99 if (initial_value_index != 0) { | |
| 100 write_attribute_name_index("ConstantValue"); | |
| 101 write_u4(2); //length always 2 | |
| 102 write_u2(initial_value_index); | |
| 103 } | |
| 104 if (access_flags.is_synthetic()) { | |
| 105 // write_synthetic_attribute(); | |
| 106 } | |
| 107 if (generic_signature_index != 0) { | |
| 108 write_signature_attribute(generic_signature_index); | |
| 109 } | |
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110 if (anno != NULL) { |
| 0 | 111 write_annotations_attribute("RuntimeVisibleAnnotations", anno); |
| 112 } | |
| 113 } | |
| 114 } | |
| 115 | |
| 116 // Write Code attribute | |
| 117 // JVMSpec| Code_attribute { | |
| 118 // JVMSpec| u2 attribute_name_index; | |
| 119 // JVMSpec| u4 attribute_length; | |
| 120 // JVMSpec| u2 max_stack; | |
| 121 // JVMSpec| u2 max_locals; | |
| 122 // JVMSpec| u4 code_length; | |
| 123 // JVMSpec| u1 code[code_length]; | |
| 124 // JVMSpec| u2 exception_table_length; | |
| 125 // JVMSpec| { u2 start_pc; | |
| 126 // JVMSpec| u2 end_pc; | |
| 127 // JVMSpec| u2 handler_pc; | |
| 128 // JVMSpec| u2 catch_type; | |
| 129 // JVMSpec| } exception_table[exception_table_length]; | |
| 130 // JVMSpec| u2 attributes_count; | |
| 131 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 132 // JVMSpec| } | |
| 133 void JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) { | |
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134 ConstMethod* const_method = method->constMethod(); |
| 0 | 135 u2 line_num_cnt = 0; |
| 136 int stackmap_len = 0; | |
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137 int local_variable_table_length = 0; |
| 0 | 138 |
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139 // compute number and length of attributes |
| 0 | 140 int attr_count = 0; |
| 141 int attr_size = 0; | |
| 142 if (const_method->has_linenumber_table()) { | |
| 143 line_num_cnt = line_number_table_entries(method); | |
| 144 if (line_num_cnt != 0) { | |
| 145 ++attr_count; | |
| 146 // Compute the complete size of the line number table attribute: | |
| 147 // LineNumberTable_attribute { | |
| 148 // u2 attribute_name_index; | |
| 149 // u4 attribute_length; | |
| 150 // u2 line_number_table_length; | |
| 151 // { u2 start_pc; | |
| 152 // u2 line_number; | |
| 153 // } line_number_table[line_number_table_length]; | |
| 154 // } | |
| 155 attr_size += 2 + 4 + 2 + line_num_cnt * (2 + 2); | |
| 156 } | |
| 157 } | |
| 158 if (method->has_stackmap_table()) { | |
| 159 stackmap_len = method->stackmap_data()->length(); | |
| 160 if (stackmap_len != 0) { | |
| 161 ++attr_count; | |
| 162 // Compute the size of the stack map table attribute (VM stores raw): | |
| 163 // StackMapTable_attribute { | |
| 164 // u2 attribute_name_index; | |
| 165 // u4 attribute_length; | |
| 166 // u2 number_of_entries; | |
| 167 // stack_map_frame_entries[number_of_entries]; | |
| 168 // } | |
| 169 attr_size += 2 + 4 + stackmap_len; | |
| 170 } | |
| 171 } | |
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172 if (method->has_localvariable_table()) { |
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173 local_variable_table_length = method->localvariable_table_length(); |
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174 ++attr_count; |
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175 if (local_variable_table_length != 0) { |
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176 // Compute the size of the local variable table attribute (VM stores raw): |
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177 // LocalVariableTable_attribute { |
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178 // u2 attribute_name_index; |
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179 // u4 attribute_length; |
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180 // u2 local_variable_table_length; |
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181 // { |
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182 // u2 start_pc; |
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183 // u2 length; |
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184 // u2 name_index; |
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185 // u2 descriptor_index; |
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186 // u2 index; |
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187 // } |
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188 attr_size += 2 + 4 + 2 + local_variable_table_length * (2 + 2 + 2 + 2 + 2); |
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189 } |
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190 } |
| 0 | 191 |
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192 ExceptionTable exception_table(method()); |
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193 int exception_table_length = exception_table.length(); |
| 0 | 194 int code_size = const_method->code_size(); |
| 195 int size = | |
| 196 2+2+4 + // max_stack, max_locals, code_length | |
| 197 code_size + // code | |
| 198 2 + // exception_table_length | |
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199 (2+2+2+2) * exception_table_length + // exception_table |
| 0 | 200 2 + // attributes_count |
| 201 attr_size; // attributes | |
| 202 | |
| 203 write_attribute_name_index("Code"); | |
| 204 write_u4(size); | |
| 205 write_u2(method->max_stack()); | |
| 206 write_u2(method->max_locals()); | |
| 207 write_u4(code_size); | |
| 208 copy_bytecodes(method, (unsigned char*)writeable_address(code_size)); | |
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209 write_u2(exception_table_length); |
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210 for (int index = 0; index < exception_table_length; index++) { |
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211 write_u2(exception_table.start_pc(index)); |
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212 write_u2(exception_table.end_pc(index)); |
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213 write_u2(exception_table.handler_pc(index)); |
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214 write_u2(exception_table.catch_type_index(index)); |
| 0 | 215 } |
| 216 write_u2(attr_count); | |
| 217 if (line_num_cnt != 0) { | |
| 218 write_line_number_table_attribute(method, line_num_cnt); | |
| 219 } | |
| 220 if (stackmap_len != 0) { | |
| 221 write_stackmap_table_attribute(method, stackmap_len); | |
| 222 } | |
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223 if (local_variable_table_length != 0) { |
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224 write_local_variable_table_attribute(method, local_variable_table_length); |
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225 } |
| 0 | 226 } |
| 227 | |
| 228 // Write Exceptions attribute | |
| 229 // JVMSpec| Exceptions_attribute { | |
| 230 // JVMSpec| u2 attribute_name_index; | |
| 231 // JVMSpec| u4 attribute_length; | |
| 232 // JVMSpec| u2 number_of_exceptions; | |
| 233 // JVMSpec| u2 exception_index_table[number_of_exceptions]; | |
| 234 // JVMSpec| } | |
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235 void JvmtiClassFileReconstituter::write_exceptions_attribute(ConstMethod* const_method) { |
| 0 | 236 CheckedExceptionElement* checked_exceptions = const_method->checked_exceptions_start(); |
| 237 int checked_exceptions_length = const_method->checked_exceptions_length(); | |
| 238 int size = | |
| 239 2 + // number_of_exceptions | |
| 240 2 * checked_exceptions_length; // exception_index_table | |
| 241 | |
| 242 write_attribute_name_index("Exceptions"); | |
| 243 write_u4(size); | |
| 244 write_u2(checked_exceptions_length); | |
| 245 for (int index = 0; index < checked_exceptions_length; index++) { | |
| 246 write_u2(checked_exceptions[index].class_cp_index); | |
| 247 } | |
| 248 } | |
| 249 | |
| 250 // Write SourceFile attribute | |
| 251 // JVMSpec| SourceFile_attribute { | |
| 252 // JVMSpec| u2 attribute_name_index; | |
| 253 // JVMSpec| u4 attribute_length; | |
| 254 // JVMSpec| u2 sourcefile_index; | |
| 255 // JVMSpec| } | |
| 256 void JvmtiClassFileReconstituter::write_source_file_attribute() { | |
| 257 assert(ikh()->source_file_name() != NULL, "caller must check"); | |
| 258 | |
| 259 write_attribute_name_index("SourceFile"); | |
| 260 write_u4(2); // always length 2 | |
| 261 write_u2(symbol_to_cpool_index(ikh()->source_file_name())); | |
| 262 } | |
| 263 | |
| 264 // Write SourceDebugExtension attribute | |
| 265 // JSR45| SourceDebugExtension_attribute { | |
| 266 // JSR45| u2 attribute_name_index; | |
| 267 // JSR45| u4 attribute_length; | |
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268 // JSR45| u1 debug_extension[attribute_length]; |
| 0 | 269 // JSR45| } |
| 270 void JvmtiClassFileReconstituter::write_source_debug_extension_attribute() { | |
| 271 assert(ikh()->source_debug_extension() != NULL, "caller must check"); | |
| 272 | |
| 273 write_attribute_name_index("SourceDebugExtension"); | |
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274 int len = (int)strlen(ikh()->source_debug_extension()); |
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275 write_u4(len); |
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276 u1* ext = (u1*)ikh()->source_debug_extension(); |
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277 for (int i=0; i<len; i++) { |
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278 write_u1(ext[i]); |
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279 } |
| 0 | 280 } |
| 281 | |
| 282 // Write (generic) Signature attribute | |
| 283 // JVMSpec| Signature_attribute { | |
| 284 // JVMSpec| u2 attribute_name_index; | |
| 285 // JVMSpec| u4 attribute_length; | |
| 286 // JVMSpec| u2 signature_index; | |
| 287 // JVMSpec| } | |
| 288 void JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) { | |
| 289 write_attribute_name_index("Signature"); | |
| 290 write_u4(2); // always length 2 | |
| 291 write_u2(generic_signature_index); | |
| 292 } | |
| 293 | |
| 294 // Compute the number of entries in the InnerClasses attribute | |
| 295 u2 JvmtiClassFileReconstituter::inner_classes_attribute_length() { | |
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296 InnerClassesIterator iter(ikh()); |
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297 return iter.length(); |
| 0 | 298 } |
| 299 | |
| 300 // Write an annotation attribute. The VM stores them in raw form, so all we need | |
| 301 // to do is add the attrubute name and fill in the length. | |
| 302 // JSR202| *Annotations_attribute { | |
| 303 // JSR202| u2 attribute_name_index; | |
| 304 // JSR202| u4 attribute_length; | |
| 305 // JSR202| ... | |
| 306 // JSR202| } | |
| 307 void JvmtiClassFileReconstituter::write_annotations_attribute(const char* attr_name, | |
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308 AnnotationArray* annos) { |
| 0 | 309 u4 length = annos->length(); |
| 310 write_attribute_name_index(attr_name); | |
| 311 write_u4(length); | |
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312 memcpy(writeable_address(length), annos->adr_at(0), length); |
| 0 | 313 } |
| 314 | |
| 315 | |
| 316 // Write InnerClasses attribute | |
| 317 // JVMSpec| InnerClasses_attribute { | |
| 318 // JVMSpec| u2 attribute_name_index; | |
| 319 // JVMSpec| u4 attribute_length; | |
| 320 // JVMSpec| u2 number_of_classes; | |
| 321 // JVMSpec| { u2 inner_class_info_index; | |
| 322 // JVMSpec| u2 outer_class_info_index; | |
| 323 // JVMSpec| u2 inner_name_index; | |
| 324 // JVMSpec| u2 inner_class_access_flags; | |
| 325 // JVMSpec| } classes[number_of_classes]; | |
| 326 // JVMSpec| } | |
| 327 void JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) { | |
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328 InnerClassesIterator iter(ikh()); |
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329 guarantee(iter.length() != 0 && iter.length() == length, |
| 0 | 330 "caller must check"); |
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331 u2 entry_count = length / InstanceKlass::inner_class_next_offset; |
| 0 | 332 u4 size = 2 + entry_count * (2+2+2+2); |
| 333 | |
| 334 write_attribute_name_index("InnerClasses"); | |
| 335 write_u4(size); | |
| 336 write_u2(entry_count); | |
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337 for (; !iter.done(); iter.next()) { |
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338 write_u2(iter.inner_class_info_index()); |
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339 write_u2(iter.outer_class_info_index()); |
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340 write_u2(iter.inner_name_index()); |
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341 write_u2(iter.inner_access_flags()); |
| 0 | 342 } |
| 343 } | |
| 344 | |
| 345 // Write Synthetic attribute | |
| 346 // JVMSpec| Synthetic_attribute { | |
| 347 // JVMSpec| u2 attribute_name_index; | |
| 348 // JVMSpec| u4 attribute_length; | |
| 349 // JVMSpec| } | |
| 350 void JvmtiClassFileReconstituter::write_synthetic_attribute() { | |
| 351 write_attribute_name_index("Synthetic"); | |
| 352 write_u4(0); //length always zero | |
| 353 } | |
| 354 | |
| 355 // Compute size of LineNumberTable | |
| 356 u2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) { | |
| 357 // The line number table is compressed so we don't know how big it is until decompressed. | |
| 358 // Decompression is really fast so we just do it twice. | |
| 359 u2 num_entries = 0; | |
| 360 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
| 361 while (stream.read_pair()) { | |
| 362 num_entries++; | |
| 363 } | |
| 364 return num_entries; | |
| 365 } | |
| 366 | |
| 367 // Write LineNumberTable attribute | |
| 368 // JVMSpec| LineNumberTable_attribute { | |
| 369 // JVMSpec| u2 attribute_name_index; | |
| 370 // JVMSpec| u4 attribute_length; | |
| 371 // JVMSpec| u2 line_number_table_length; | |
| 372 // JVMSpec| { u2 start_pc; | |
| 373 // JVMSpec| u2 line_number; | |
| 374 // JVMSpec| } line_number_table[line_number_table_length]; | |
| 375 // JVMSpec| } | |
| 376 void JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method, | |
| 377 u2 num_entries) { | |
| 378 | |
| 379 write_attribute_name_index("LineNumberTable"); | |
| 380 write_u4(2 + num_entries * (2 + 2)); | |
| 381 write_u2(num_entries); | |
| 382 | |
| 383 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
| 384 while (stream.read_pair()) { | |
| 385 write_u2(stream.bci()); | |
| 386 write_u2(stream.line()); | |
| 387 } | |
| 388 } | |
| 389 | |
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390 // Write LineNumberTable attribute |
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391 // JVMSpec| LocalVariableTable_attribute { |
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392 // JVMSpec| u2 attribute_name_index; |
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393 // JVMSpec| u4 attribute_length; |
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394 // JVMSpec| u2 local_variable_table_length; |
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395 // JVMSpec| { u2 start_pc; |
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396 // JVMSpec| u2 length; |
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397 // JVMSpec| u2 name_index; |
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398 // JVMSpec| u2 descriptor_index; |
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399 // JVMSpec| u2 index; |
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400 // JVMSpec| } local_variable_table[local_variable_table_length]; |
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401 // JVMSpec| } |
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402 void JvmtiClassFileReconstituter::write_local_variable_table_attribute(methodHandle method, u2 num_entries) { |
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403 write_attribute_name_index("LocalVariableTable"); |
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404 write_u4(2 + num_entries * (2 + 2 + 2 + 2 + 2)); |
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405 write_u2(num_entries); |
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406 |
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407 assert(method->localvariable_table_length() == num_entries, "just checking"); |
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408 |
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409 LocalVariableTableElement *elem = method->localvariable_table_start(); |
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410 for (int j=0; j<method->localvariable_table_length(); j++) { |
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411 write_u2(elem->start_bci); |
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412 write_u2(elem->length); |
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413 write_u2(elem->name_cp_index); |
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414 write_u2(elem->descriptor_cp_index); |
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415 write_u2(elem->slot); |
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416 elem++; |
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417 } |
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418 } |
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419 |
| 0 | 420 // Write stack map table attribute |
| 421 // JSR-202| StackMapTable_attribute { | |
| 422 // JSR-202| u2 attribute_name_index; | |
| 423 // JSR-202| u4 attribute_length; | |
| 424 // JSR-202| u2 number_of_entries; | |
| 425 // JSR-202| stack_map_frame_entries[number_of_entries]; | |
| 426 // JSR-202| } | |
| 427 void JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method, | |
| 428 int stackmap_len) { | |
| 429 | |
| 430 write_attribute_name_index("StackMapTable"); | |
| 431 write_u4(stackmap_len); | |
| 432 memcpy( | |
| 433 writeable_address(stackmap_len), | |
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434 (void*)(method->stackmap_data()->adr_at(0)), |
| 0 | 435 stackmap_len); |
| 436 } | |
| 437 | |
| 438 // Write one method_info structure | |
| 439 // JVMSpec| method_info { | |
| 440 // JVMSpec| u2 access_flags; | |
| 441 // JVMSpec| u2 name_index; | |
| 442 // JVMSpec| u2 descriptor_index; | |
| 443 // JVMSpec| u2 attributes_count; | |
| 444 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 445 // JVMSpec| } | |
| 446 void JvmtiClassFileReconstituter::write_method_info(methodHandle method) { | |
| 447 AccessFlags access_flags = method->access_flags(); | |
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448 ConstMethod* const_method = method->constMethod(); |
| 0 | 449 u2 generic_signature_index = const_method->generic_signature_index(); |
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450 AnnotationArray* anno = method->annotations(); |
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451 AnnotationArray* param_anno = method->parameter_annotations(); |
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452 AnnotationArray* default_anno = method->annotation_default(); |
| 0 | 453 |
| 454 write_u2(access_flags.get_flags() & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
| 455 write_u2(const_method->name_index()); | |
| 456 write_u2(const_method->signature_index()); | |
| 457 | |
| 458 // write attributes in the same order javac does, so we can test with byte for | |
| 459 // byte comparison | |
| 460 int attr_count = 0; | |
| 461 if (const_method->code_size() != 0) { | |
| 462 ++attr_count; // has Code attribute | |
| 463 } | |
| 464 if (const_method->has_checked_exceptions()) { | |
| 465 ++attr_count; // has Exceptions attribute | |
| 466 } | |
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467 if (default_anno != NULL) { |
| 0 | 468 ++attr_count; // has AnnotationDefault attribute |
| 469 } | |
| 470 // Deprecated attribute would go here | |
| 471 if (access_flags.is_synthetic()) { // FIXME | |
| 472 // ++attr_count; | |
| 473 } | |
| 474 if (generic_signature_index != 0) { | |
| 475 ++attr_count; | |
| 476 } | |
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477 if (anno != NULL) { |
| 0 | 478 ++attr_count; // has RuntimeVisibleAnnotations attribute |
| 479 } | |
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480 if (param_anno != NULL) { |
| 0 | 481 ++attr_count; // has RuntimeVisibleParameterAnnotations attribute |
| 482 } | |
| 483 | |
| 484 write_u2(attr_count); | |
| 485 if (const_method->code_size() > 0) { | |
| 486 write_code_attribute(method); | |
| 487 } | |
| 488 if (const_method->has_checked_exceptions()) { | |
| 489 write_exceptions_attribute(const_method); | |
| 490 } | |
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491 if (default_anno != NULL) { |
| 0 | 492 write_annotations_attribute("AnnotationDefault", default_anno); |
| 493 } | |
| 494 // Deprecated attribute would go here | |
| 495 if (access_flags.is_synthetic()) { | |
| 496 // write_synthetic_attribute(); | |
| 497 } | |
| 498 if (generic_signature_index != 0) { | |
| 499 write_signature_attribute(generic_signature_index); | |
| 500 } | |
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501 if (anno != NULL) { |
| 0 | 502 write_annotations_attribute("RuntimeVisibleAnnotations", anno); |
| 503 } | |
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504 if (param_anno != NULL) { |
| 0 | 505 write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno); |
| 506 } | |
| 507 } | |
| 508 | |
| 509 // Write the class attributes portion of ClassFile structure | |
| 510 // JVMSpec| u2 attributes_count; | |
| 511 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 512 void JvmtiClassFileReconstituter::write_class_attributes() { | |
| 513 u2 inner_classes_length = inner_classes_attribute_length(); | |
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514 Symbol* generic_signature = ikh()->generic_signature(); |
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515 AnnotationArray* anno = ikh()->class_annotations(); |
| 0 | 516 |
| 517 int attr_count = 0; | |
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518 if (generic_signature != NULL) { |
| 0 | 519 ++attr_count; |
| 520 } | |
| 521 if (ikh()->source_file_name() != NULL) { | |
| 522 ++attr_count; | |
| 523 } | |
| 524 if (ikh()->source_debug_extension() != NULL) { | |
| 525 ++attr_count; | |
| 526 } | |
| 527 if (inner_classes_length > 0) { | |
| 528 ++attr_count; | |
| 529 } | |
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530 if (anno != NULL) { |
| 0 | 531 ++attr_count; // has RuntimeVisibleAnnotations attribute |
| 532 } | |
| 533 | |
| 534 write_u2(attr_count); | |
| 535 | |
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536 if (generic_signature != NULL) { |
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537 write_signature_attribute(symbol_to_cpool_index(generic_signature)); |
| 0 | 538 } |
| 539 if (ikh()->source_file_name() != NULL) { | |
| 540 write_source_file_attribute(); | |
| 541 } | |
| 542 if (ikh()->source_debug_extension() != NULL) { | |
| 543 write_source_debug_extension_attribute(); | |
| 544 } | |
| 545 if (inner_classes_length > 0) { | |
| 546 write_inner_classes_attribute(inner_classes_length); | |
| 547 } | |
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548 if (anno != NULL) { |
| 0 | 549 write_annotations_attribute("RuntimeVisibleAnnotations", anno); |
| 550 } | |
| 551 } | |
| 552 | |
| 553 // Write the method information portion of ClassFile structure | |
| 554 // JVMSpec| u2 methods_count; | |
| 555 // JVMSpec| method_info methods[methods_count]; | |
| 556 void JvmtiClassFileReconstituter::write_method_infos() { | |
| 557 HandleMark hm(thread()); | |
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558 Array<Method*>* methods = ikh()->methods(); |
| 0 | 559 int num_methods = methods->length(); |
| 560 | |
| 561 write_u2(num_methods); | |
| 562 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 563 int index; | |
| 564 int original_index; | |
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565 intArray method_order(num_methods, 0); |
| 0 | 566 |
| 567 // invert the method order mapping | |
| 568 for (index = 0; index < num_methods; index++) { | |
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569 original_index = ikh()->method_ordering()->at(index); |
| 0 | 570 assert(original_index >= 0 && original_index < num_methods, |
| 571 "invalid original method index"); | |
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572 method_order.at_put(original_index, index); |
| 0 | 573 } |
| 574 | |
| 575 // write in original order | |
| 576 for (original_index = 0; original_index < num_methods; original_index++) { | |
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577 index = method_order.at(original_index); |
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578 methodHandle method(thread(), methods->at(index)); |
| 0 | 579 write_method_info(method); |
| 580 } | |
| 581 } else { | |
| 582 // method order not preserved just dump the method infos | |
| 583 for (int index = 0; index < num_methods; index++) { | |
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584 methodHandle method(thread(), methods->at(index)); |
| 0 | 585 write_method_info(method); |
| 586 } | |
| 587 } | |
| 588 } | |
| 589 | |
| 590 void JvmtiClassFileReconstituter::write_class_file_format() { | |
| 591 ReallocMark(); | |
| 592 | |
| 593 // JVMSpec| ClassFile { | |
| 594 // JVMSpec| u4 magic; | |
| 595 write_u4(0xCAFEBABE); | |
| 596 | |
| 597 // JVMSpec| u2 minor_version; | |
| 598 // JVMSpec| u2 major_version; | |
| 599 write_u2(ikh()->minor_version()); | |
| 600 u2 major = ikh()->major_version(); | |
| 601 write_u2(major); | |
| 602 | |
| 603 // JVMSpec| u2 constant_pool_count; | |
| 604 // JVMSpec| cp_info constant_pool[constant_pool_count-1]; | |
| 605 write_u2(cpool()->length()); | |
| 606 copy_cpool_bytes(writeable_address(cpool_size())); | |
| 607 | |
| 608 // JVMSpec| u2 access_flags; | |
| 609 write_u2(ikh()->access_flags().get_flags() & JVM_RECOGNIZED_CLASS_MODIFIERS); | |
| 610 | |
| 611 // JVMSpec| u2 this_class; | |
| 612 // JVMSpec| u2 super_class; | |
| 613 write_u2(class_symbol_to_cpool_index(ikh()->name())); | |
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614 Klass* super_class = ikh()->super(); |
| 0 | 615 write_u2(super_class == NULL? 0 : // zero for java.lang.Object |
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616 class_symbol_to_cpool_index(super_class->name())); |
| 0 | 617 |
| 618 // JVMSpec| u2 interfaces_count; | |
| 619 // JVMSpec| u2 interfaces[interfaces_count]; | |
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620 Array<Klass*>* interfaces = ikh()->local_interfaces(); |
| 0 | 621 int num_interfaces = interfaces->length(); |
| 622 write_u2(num_interfaces); | |
| 623 for (int index = 0; index < num_interfaces; index++) { | |
| 624 HandleMark hm(thread()); | |
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625 instanceKlassHandle iikh(thread(), interfaces->at(index)); |
| 0 | 626 write_u2(class_symbol_to_cpool_index(iikh->name())); |
| 627 } | |
| 628 | |
| 629 // JVMSpec| u2 fields_count; | |
| 630 // JVMSpec| field_info fields[fields_count]; | |
| 631 write_field_infos(); | |
| 632 | |
| 633 // JVMSpec| u2 methods_count; | |
| 634 // JVMSpec| method_info methods[methods_count]; | |
| 635 write_method_infos(); | |
| 636 | |
| 637 // JVMSpec| u2 attributes_count; | |
| 638 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 639 // JVMSpec| } /* end ClassFile 8? | |
| 640 write_class_attributes(); | |
| 641 } | |
| 642 | |
| 643 address JvmtiClassFileReconstituter::writeable_address(size_t size) { | |
| 644 size_t used_size = _buffer_ptr - _buffer; | |
| 645 if (size + used_size >= _buffer_size) { | |
| 646 // compute the new buffer size: must be at least twice as big as before | |
| 647 // plus whatever new is being used; then convert to nice clean block boundary | |
| 648 size_t new_buffer_size = (size + _buffer_size*2 + 1) / initial_buffer_size | |
| 649 * initial_buffer_size; | |
| 650 | |
| 651 // VM goes belly-up if the memory isn't available, so cannot do OOM processing | |
| 652 _buffer = REALLOC_RESOURCE_ARRAY(u1, _buffer, _buffer_size, new_buffer_size); | |
| 653 _buffer_size = new_buffer_size; | |
| 654 _buffer_ptr = _buffer + used_size; | |
| 655 } | |
| 656 u1* ret_ptr = _buffer_ptr; | |
| 657 _buffer_ptr += size; | |
| 658 return ret_ptr; | |
| 659 } | |
| 660 | |
| 661 void JvmtiClassFileReconstituter::write_attribute_name_index(const char* name) { | |
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662 TempNewSymbol sym = SymbolTable::probe(name, (int)strlen(name)); |
| 0 | 663 assert(sym != NULL, "attribute name symbol not found"); |
| 664 u2 attr_name_index = symbol_to_cpool_index(sym); | |
| 665 assert(attr_name_index != 0, "attribute name symbol not in constant pool"); | |
| 666 write_u2(attr_name_index); | |
| 667 } | |
| 668 | |
| 669 void JvmtiClassFileReconstituter::write_u1(u1 x) { | |
| 670 *writeable_address(1) = x; | |
| 671 } | |
| 672 | |
| 673 void JvmtiClassFileReconstituter::write_u2(u2 x) { | |
| 674 Bytes::put_Java_u2(writeable_address(2), x); | |
| 675 } | |
| 676 | |
| 677 void JvmtiClassFileReconstituter::write_u4(u4 x) { | |
| 678 Bytes::put_Java_u4(writeable_address(4), x); | |
| 679 } | |
| 680 | |
| 681 void JvmtiClassFileReconstituter::write_u8(u8 x) { | |
| 682 Bytes::put_Java_u8(writeable_address(8), x); | |
| 683 } | |
| 684 | |
| 685 void JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh, | |
| 686 unsigned char* bytecodes) { | |
| 687 // use a BytecodeStream to iterate over the bytecodes. JVM/fast bytecodes | |
| 688 // and the breakpoint bytecode are converted to their original bytecodes. | |
| 689 | |
| 690 BytecodeStream bs(mh); | |
| 691 | |
| 692 unsigned char* p = bytecodes; | |
| 693 Bytecodes::Code code; | |
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694 bool is_rewritten = InstanceKlass::cast(mh->method_holder())->is_rewritten(); |
| 0 | 695 |
| 696 while ((code = bs.next()) >= 0) { | |
| 697 assert(Bytecodes::is_java_code(code), "sanity check"); | |
| 698 assert(code != Bytecodes::_breakpoint, "sanity check"); | |
| 699 | |
| 700 // length of bytecode (mnemonic + operands) | |
| 701 address bcp = bs.bcp(); | |
| 1565 | 702 int len = bs.instruction_size(); |
| 0 | 703 assert(len > 0, "length must be > 0"); |
| 704 | |
| 705 // copy the bytecodes | |
| 706 *p = (unsigned char) (bs.is_wide()? Bytecodes::_wide : code); | |
| 707 if (len > 1) { | |
| 708 memcpy(p+1, bcp+1, len-1); | |
| 709 } | |
| 710 | |
| 711 // During linking the get/put and invoke instructions are rewritten | |
| 712 // with an index into the constant pool cache. The original constant | |
| 713 // pool index must be returned to caller. Rewrite the index. | |
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714 if (is_rewritten && len > 1) { |
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715 bool is_wide = false; |
| 0 | 716 switch (code) { |
| 717 case Bytecodes::_getstatic : // fall through | |
| 718 case Bytecodes::_putstatic : // fall through | |
| 719 case Bytecodes::_getfield : // fall through | |
| 720 case Bytecodes::_putfield : // fall through | |
| 721 case Bytecodes::_invokevirtual : // fall through | |
| 722 case Bytecodes::_invokespecial : // fall through | |
| 723 case Bytecodes::_invokestatic : // fall through | |
|
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724 case Bytecodes::_invokedynamic : // fall through |
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725 case Bytecodes::_invokeinterface : { |
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726 assert(len == 3 || |
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727 (code == Bytecodes::_invokeinterface && len == 5) || |
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728 (code == Bytecodes::_invokedynamic && len == 5), |
| 0 | 729 "sanity check"); |
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730 |
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731 int cpci = Bytes::get_native_u2(bcp+1); |
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732 bool is_invokedynamic = (EnableInvokeDynamic && code == Bytecodes::_invokedynamic); |
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733 ConstantPoolCacheEntry* entry; |
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734 if (is_invokedynamic) { |
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735 cpci = Bytes::get_native_u4(bcp+1); |
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736 entry = mh->constants()->invokedynamic_cp_cache_entry_at(cpci); |
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737 } else { |
| 0 | 738 // cache cannot be pre-fetched since some classes won't have it yet |
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739 entry = mh->constants()->cache()->entry_at(cpci); |
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740 } |
| 0 | 741 int i = entry->constant_pool_index(); |
| 742 assert(i < mh->constants()->length(), "sanity check"); | |
| 743 Bytes::put_Java_u2((address)(p+1), (u2)i); // java byte ordering | |
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744 if (is_invokedynamic) *(p+3) = *(p+4) = 0; |
| 0 | 745 break; |
| 746 } | |
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747 case Bytecodes::_ldc_w: |
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748 is_wide = true; // fall through |
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749 case Bytecodes::_ldc: { |
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750 if (bs.raw_code() == Bytecodes::_fast_aldc || bs.raw_code() == Bytecodes::_fast_aldc_w) { |
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751 int cpci = is_wide ? Bytes::get_native_u2(bcp+1) : (u1)(*(bcp+1)); |
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752 int i = mh->constants()->object_to_cp_index(cpci); |
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753 assert(i < mh->constants()->length(), "sanity check"); |
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754 if (is_wide) { |
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755 Bytes::put_Java_u2((address)(p+1), (u2)i); // java byte ordering |
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756 } else { |
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757 *(p+1) = (u1)i; |
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758 } |
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759 } |
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760 break; |
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761 } |
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762 } |
| 0 | 763 } |
| 764 | |
| 765 p += len; | |
| 766 } | |
| 767 } |