Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiClassFileReconstituter.cpp @ 2426:1d1603768966
7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Tue, 05 Apr 2011 14:12:31 -0700 |
| parents | b92c45f2bc75 |
| children | e6b1331a51d2 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2005, 2011, 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" | |
| 28 #include "prims/jvmtiClassFileReconstituter.hpp" | |
| 29 #include "runtime/signature.hpp" | |
| 30 #ifdef TARGET_ARCH_x86 | |
| 31 # include "bytes_x86.hpp" | |
| 32 #endif | |
| 33 #ifdef TARGET_ARCH_sparc | |
| 34 # include "bytes_sparc.hpp" | |
| 35 #endif | |
| 36 #ifdef TARGET_ARCH_zero | |
| 37 # include "bytes_zero.hpp" | |
| 38 #endif | |
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39 #ifdef TARGET_ARCH_arm |
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40 # include "bytes_arm.hpp" |
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41 #endif |
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42 #ifdef TARGET_ARCH_ppc |
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43 # include "bytes_ppc.hpp" |
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44 #endif |
| 0 | 45 // FIXME: add Deprecated, LVT, LVTT attributes |
| 46 // FIXME: fix Synthetic attribute | |
| 47 // FIXME: per Serguei, add error return handling for constantPoolOopDesc::copy_cpool_bytes() | |
| 48 | |
| 49 | |
| 50 // Write the field information portion of ClassFile structure | |
| 51 // JVMSpec| u2 fields_count; | |
| 52 // JVMSpec| field_info fields[fields_count]; | |
| 53 void JvmtiClassFileReconstituter::write_field_infos() { | |
| 54 HandleMark hm(thread()); | |
| 55 typeArrayHandle fields(thread(), ikh()->fields()); | |
| 56 int fields_length = fields->length(); | |
| 57 int num_fields = fields_length / instanceKlass::next_offset; | |
| 58 objArrayHandle fields_anno(thread(), ikh()->fields_annotations()); | |
| 59 | |
| 60 write_u2(num_fields); | |
| 61 for (int index = 0; index < fields_length; index += instanceKlass::next_offset) { | |
| 62 AccessFlags access_flags; | |
| 63 int flags = fields->ushort_at(index + instanceKlass::access_flags_offset); | |
| 64 access_flags.set_flags(flags); | |
| 65 int name_index = fields->ushort_at(index + instanceKlass::name_index_offset); | |
| 66 int signature_index = fields->ushort_at(index + instanceKlass::signature_index_offset); | |
| 67 int initial_value_index = fields->ushort_at(index + instanceKlass::initval_index_offset); | |
| 68 guarantee(name_index != 0 && signature_index != 0, "bad constant pool index for field"); | |
| 69 int offset = ikh()->offset_from_fields( index ); | |
| 70 int generic_signature_index = | |
| 71 fields->ushort_at(index + instanceKlass::generic_signature_offset); | |
| 72 typeArrayHandle anno(thread(), fields_anno.not_null() ? | |
| 73 (typeArrayOop)(fields_anno->obj_at(index / instanceKlass::next_offset)) : | |
| 74 (typeArrayOop)NULL); | |
| 75 | |
| 76 // JVMSpec| field_info { | |
| 77 // JVMSpec| u2 access_flags; | |
| 78 // JVMSpec| u2 name_index; | |
| 79 // JVMSpec| u2 descriptor_index; | |
| 80 // JVMSpec| u2 attributes_count; | |
| 81 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 82 // JVMSpec| } | |
| 83 | |
| 84 write_u2(flags & JVM_RECOGNIZED_FIELD_MODIFIERS); | |
| 85 write_u2(name_index); | |
| 86 write_u2(signature_index); | |
| 87 int attr_count = 0; | |
| 88 if (initial_value_index != 0) { | |
| 89 ++attr_count; | |
| 90 } | |
| 91 if (access_flags.is_synthetic()) { | |
| 92 // ++attr_count; | |
| 93 } | |
| 94 if (generic_signature_index != 0) { | |
| 95 ++attr_count; | |
| 96 } | |
| 97 if (anno.not_null()) { | |
| 98 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
| 99 } | |
| 100 | |
| 101 write_u2(attr_count); | |
| 102 | |
| 103 if (initial_value_index != 0) { | |
| 104 write_attribute_name_index("ConstantValue"); | |
| 105 write_u4(2); //length always 2 | |
| 106 write_u2(initial_value_index); | |
| 107 } | |
| 108 if (access_flags.is_synthetic()) { | |
| 109 // write_synthetic_attribute(); | |
| 110 } | |
| 111 if (generic_signature_index != 0) { | |
| 112 write_signature_attribute(generic_signature_index); | |
| 113 } | |
| 114 if (anno.not_null()) { | |
| 115 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
| 116 } | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 // Write Code attribute | |
| 121 // JVMSpec| Code_attribute { | |
| 122 // JVMSpec| u2 attribute_name_index; | |
| 123 // JVMSpec| u4 attribute_length; | |
| 124 // JVMSpec| u2 max_stack; | |
| 125 // JVMSpec| u2 max_locals; | |
| 126 // JVMSpec| u4 code_length; | |
| 127 // JVMSpec| u1 code[code_length]; | |
| 128 // JVMSpec| u2 exception_table_length; | |
| 129 // JVMSpec| { u2 start_pc; | |
| 130 // JVMSpec| u2 end_pc; | |
| 131 // JVMSpec| u2 handler_pc; | |
| 132 // JVMSpec| u2 catch_type; | |
| 133 // JVMSpec| } exception_table[exception_table_length]; | |
| 134 // JVMSpec| u2 attributes_count; | |
| 135 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 136 // JVMSpec| } | |
| 137 void JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) { | |
| 138 constMethodHandle const_method(thread(), method->constMethod()); | |
| 139 u2 line_num_cnt = 0; | |
| 140 int stackmap_len = 0; | |
| 141 | |
| 142 // compute number and length of attributes -- FIXME: for now no LVT | |
| 143 int attr_count = 0; | |
| 144 int attr_size = 0; | |
| 145 if (const_method->has_linenumber_table()) { | |
| 146 line_num_cnt = line_number_table_entries(method); | |
| 147 if (line_num_cnt != 0) { | |
| 148 ++attr_count; | |
| 149 // Compute the complete size of the line number table attribute: | |
| 150 // LineNumberTable_attribute { | |
| 151 // u2 attribute_name_index; | |
| 152 // u4 attribute_length; | |
| 153 // u2 line_number_table_length; | |
| 154 // { u2 start_pc; | |
| 155 // u2 line_number; | |
| 156 // } line_number_table[line_number_table_length]; | |
| 157 // } | |
| 158 attr_size += 2 + 4 + 2 + line_num_cnt * (2 + 2); | |
| 159 } | |
| 160 } | |
| 161 if (method->has_stackmap_table()) { | |
| 162 stackmap_len = method->stackmap_data()->length(); | |
| 163 if (stackmap_len != 0) { | |
| 164 ++attr_count; | |
| 165 // Compute the size of the stack map table attribute (VM stores raw): | |
| 166 // StackMapTable_attribute { | |
| 167 // u2 attribute_name_index; | |
| 168 // u4 attribute_length; | |
| 169 // u2 number_of_entries; | |
| 170 // stack_map_frame_entries[number_of_entries]; | |
| 171 // } | |
| 172 attr_size += 2 + 4 + stackmap_len; | |
| 173 } | |
| 174 } | |
| 175 | |
| 176 typeArrayHandle exception_table(thread(), const_method->exception_table()); | |
| 177 int exception_table_length = exception_table->length(); | |
| 178 int exception_table_entries = exception_table_length / 4; | |
| 179 int code_size = const_method->code_size(); | |
| 180 int size = | |
| 181 2+2+4 + // max_stack, max_locals, code_length | |
| 182 code_size + // code | |
| 183 2 + // exception_table_length | |
| 184 (2+2+2+2) * exception_table_entries + // exception_table | |
| 185 2 + // attributes_count | |
| 186 attr_size; // attributes | |
| 187 | |
| 188 write_attribute_name_index("Code"); | |
| 189 write_u4(size); | |
| 190 write_u2(method->max_stack()); | |
| 191 write_u2(method->max_locals()); | |
| 192 write_u4(code_size); | |
| 193 copy_bytecodes(method, (unsigned char*)writeable_address(code_size)); | |
| 194 write_u2(exception_table_entries); | |
| 195 for (int index = 0; index < exception_table_length; ) { | |
| 196 write_u2(exception_table->int_at(index++)); | |
| 197 write_u2(exception_table->int_at(index++)); | |
| 198 write_u2(exception_table->int_at(index++)); | |
| 199 write_u2(exception_table->int_at(index++)); | |
| 200 } | |
| 201 write_u2(attr_count); | |
| 202 if (line_num_cnt != 0) { | |
| 203 write_line_number_table_attribute(method, line_num_cnt); | |
| 204 } | |
| 205 if (stackmap_len != 0) { | |
| 206 write_stackmap_table_attribute(method, stackmap_len); | |
| 207 } | |
| 208 | |
| 209 // FIXME: write LVT attribute | |
| 210 } | |
| 211 | |
| 212 // Write Exceptions attribute | |
| 213 // JVMSpec| Exceptions_attribute { | |
| 214 // JVMSpec| u2 attribute_name_index; | |
| 215 // JVMSpec| u4 attribute_length; | |
| 216 // JVMSpec| u2 number_of_exceptions; | |
| 217 // JVMSpec| u2 exception_index_table[number_of_exceptions]; | |
| 218 // JVMSpec| } | |
| 219 void JvmtiClassFileReconstituter::write_exceptions_attribute(constMethodHandle const_method) { | |
| 220 CheckedExceptionElement* checked_exceptions = const_method->checked_exceptions_start(); | |
| 221 int checked_exceptions_length = const_method->checked_exceptions_length(); | |
| 222 int size = | |
| 223 2 + // number_of_exceptions | |
| 224 2 * checked_exceptions_length; // exception_index_table | |
| 225 | |
| 226 write_attribute_name_index("Exceptions"); | |
| 227 write_u4(size); | |
| 228 write_u2(checked_exceptions_length); | |
| 229 for (int index = 0; index < checked_exceptions_length; index++) { | |
| 230 write_u2(checked_exceptions[index].class_cp_index); | |
| 231 } | |
| 232 } | |
| 233 | |
| 234 // Write SourceFile attribute | |
| 235 // JVMSpec| SourceFile_attribute { | |
| 236 // JVMSpec| u2 attribute_name_index; | |
| 237 // JVMSpec| u4 attribute_length; | |
| 238 // JVMSpec| u2 sourcefile_index; | |
| 239 // JVMSpec| } | |
| 240 void JvmtiClassFileReconstituter::write_source_file_attribute() { | |
| 241 assert(ikh()->source_file_name() != NULL, "caller must check"); | |
| 242 | |
| 243 write_attribute_name_index("SourceFile"); | |
| 244 write_u4(2); // always length 2 | |
| 245 write_u2(symbol_to_cpool_index(ikh()->source_file_name())); | |
| 246 } | |
| 247 | |
| 248 // Write SourceDebugExtension attribute | |
| 249 // JSR45| SourceDebugExtension_attribute { | |
| 250 // JSR45| u2 attribute_name_index; | |
| 251 // JSR45| u4 attribute_length; | |
| 252 // JSR45| u2 sourcefile_index; | |
| 253 // JSR45| } | |
| 254 void JvmtiClassFileReconstituter::write_source_debug_extension_attribute() { | |
| 255 assert(ikh()->source_debug_extension() != NULL, "caller must check"); | |
| 256 | |
| 257 write_attribute_name_index("SourceDebugExtension"); | |
| 258 write_u4(2); // always length 2 | |
| 259 write_u2(symbol_to_cpool_index(ikh()->source_debug_extension())); | |
| 260 } | |
| 261 | |
| 262 // Write (generic) Signature attribute | |
| 263 // JVMSpec| Signature_attribute { | |
| 264 // JVMSpec| u2 attribute_name_index; | |
| 265 // JVMSpec| u4 attribute_length; | |
| 266 // JVMSpec| u2 signature_index; | |
| 267 // JVMSpec| } | |
| 268 void JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) { | |
| 269 write_attribute_name_index("Signature"); | |
| 270 write_u4(2); // always length 2 | |
| 271 write_u2(generic_signature_index); | |
| 272 } | |
| 273 | |
| 274 // Compute the number of entries in the InnerClasses attribute | |
| 275 u2 JvmtiClassFileReconstituter::inner_classes_attribute_length() { | |
| 276 typeArrayOop inner_class_list = ikh()->inner_classes(); | |
| 277 return (inner_class_list == NULL) ? 0 : inner_class_list->length(); | |
| 278 } | |
| 279 | |
| 280 // Write an annotation attribute. The VM stores them in raw form, so all we need | |
| 281 // to do is add the attrubute name and fill in the length. | |
| 282 // JSR202| *Annotations_attribute { | |
| 283 // JSR202| u2 attribute_name_index; | |
| 284 // JSR202| u4 attribute_length; | |
| 285 // JSR202| ... | |
| 286 // JSR202| } | |
| 287 void JvmtiClassFileReconstituter::write_annotations_attribute(const char* attr_name, | |
| 288 typeArrayHandle annos) { | |
| 289 u4 length = annos->length(); | |
| 290 write_attribute_name_index(attr_name); | |
| 291 write_u4(length); | |
| 292 memcpy(writeable_address(length), annos->byte_at_addr(0), length); | |
| 293 } | |
| 294 | |
| 295 | |
| 296 // Write InnerClasses attribute | |
| 297 // JVMSpec| InnerClasses_attribute { | |
| 298 // JVMSpec| u2 attribute_name_index; | |
| 299 // JVMSpec| u4 attribute_length; | |
| 300 // JVMSpec| u2 number_of_classes; | |
| 301 // JVMSpec| { u2 inner_class_info_index; | |
| 302 // JVMSpec| u2 outer_class_info_index; | |
| 303 // JVMSpec| u2 inner_name_index; | |
| 304 // JVMSpec| u2 inner_class_access_flags; | |
| 305 // JVMSpec| } classes[number_of_classes]; | |
| 306 // JVMSpec| } | |
| 307 void JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) { | |
| 308 typeArrayOop inner_class_list = ikh()->inner_classes(); | |
| 309 guarantee(inner_class_list != NULL && inner_class_list->length() == length, | |
| 310 "caller must check"); | |
| 311 typeArrayHandle inner_class_list_h(thread(), inner_class_list); | |
| 312 assert (length % instanceKlass::inner_class_next_offset == 0, "just checking"); | |
| 313 u2 entry_count = length / instanceKlass::inner_class_next_offset; | |
| 314 u4 size = 2 + entry_count * (2+2+2+2); | |
| 315 | |
| 316 write_attribute_name_index("InnerClasses"); | |
| 317 write_u4(size); | |
| 318 write_u2(entry_count); | |
| 319 for (int i = 0; i < length; i += instanceKlass::inner_class_next_offset) { | |
| 320 write_u2(inner_class_list_h->ushort_at( | |
| 321 i + instanceKlass::inner_class_inner_class_info_offset)); | |
| 322 write_u2(inner_class_list_h->ushort_at( | |
| 323 i + instanceKlass::inner_class_outer_class_info_offset)); | |
| 324 write_u2(inner_class_list_h->ushort_at( | |
| 325 i + instanceKlass::inner_class_inner_name_offset)); | |
| 326 write_u2(inner_class_list_h->ushort_at( | |
| 327 i + instanceKlass::inner_class_access_flags_offset)); | |
| 328 } | |
| 329 } | |
| 330 | |
| 331 // Write Synthetic attribute | |
| 332 // JVMSpec| Synthetic_attribute { | |
| 333 // JVMSpec| u2 attribute_name_index; | |
| 334 // JVMSpec| u4 attribute_length; | |
| 335 // JVMSpec| } | |
| 336 void JvmtiClassFileReconstituter::write_synthetic_attribute() { | |
| 337 write_attribute_name_index("Synthetic"); | |
| 338 write_u4(0); //length always zero | |
| 339 } | |
| 340 | |
| 341 // Compute size of LineNumberTable | |
| 342 u2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) { | |
| 343 // The line number table is compressed so we don't know how big it is until decompressed. | |
| 344 // Decompression is really fast so we just do it twice. | |
| 345 u2 num_entries = 0; | |
| 346 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
| 347 while (stream.read_pair()) { | |
| 348 num_entries++; | |
| 349 } | |
| 350 return num_entries; | |
| 351 } | |
| 352 | |
| 353 // Write LineNumberTable attribute | |
| 354 // JVMSpec| LineNumberTable_attribute { | |
| 355 // JVMSpec| u2 attribute_name_index; | |
| 356 // JVMSpec| u4 attribute_length; | |
| 357 // JVMSpec| u2 line_number_table_length; | |
| 358 // JVMSpec| { u2 start_pc; | |
| 359 // JVMSpec| u2 line_number; | |
| 360 // JVMSpec| } line_number_table[line_number_table_length]; | |
| 361 // JVMSpec| } | |
| 362 void JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method, | |
| 363 u2 num_entries) { | |
| 364 | |
| 365 write_attribute_name_index("LineNumberTable"); | |
| 366 write_u4(2 + num_entries * (2 + 2)); | |
| 367 write_u2(num_entries); | |
| 368 | |
| 369 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
| 370 while (stream.read_pair()) { | |
| 371 write_u2(stream.bci()); | |
| 372 write_u2(stream.line()); | |
| 373 } | |
| 374 } | |
| 375 | |
| 376 // Write stack map table attribute | |
| 377 // JSR-202| StackMapTable_attribute { | |
| 378 // JSR-202| u2 attribute_name_index; | |
| 379 // JSR-202| u4 attribute_length; | |
| 380 // JSR-202| u2 number_of_entries; | |
| 381 // JSR-202| stack_map_frame_entries[number_of_entries]; | |
| 382 // JSR-202| } | |
| 383 void JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method, | |
| 384 int stackmap_len) { | |
| 385 | |
| 386 write_attribute_name_index("StackMapTable"); | |
| 387 write_u4(stackmap_len); | |
| 388 memcpy( | |
| 389 writeable_address(stackmap_len), | |
| 390 (void*)(method->stackmap_data()->byte_at_addr(0)), | |
| 391 stackmap_len); | |
| 392 } | |
| 393 | |
| 394 // Write one method_info structure | |
| 395 // JVMSpec| method_info { | |
| 396 // JVMSpec| u2 access_flags; | |
| 397 // JVMSpec| u2 name_index; | |
| 398 // JVMSpec| u2 descriptor_index; | |
| 399 // JVMSpec| u2 attributes_count; | |
| 400 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 401 // JVMSpec| } | |
| 402 void JvmtiClassFileReconstituter::write_method_info(methodHandle method) { | |
| 403 AccessFlags access_flags = method->access_flags(); | |
| 404 constMethodHandle const_method(thread(), method->constMethod()); | |
| 405 u2 generic_signature_index = const_method->generic_signature_index(); | |
| 406 typeArrayHandle anno(thread(), method->annotations()); | |
| 407 typeArrayHandle param_anno(thread(), method->parameter_annotations()); | |
| 408 typeArrayHandle default_anno(thread(), method->annotation_default()); | |
| 409 | |
| 410 write_u2(access_flags.get_flags() & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
| 411 write_u2(const_method->name_index()); | |
| 412 write_u2(const_method->signature_index()); | |
| 413 | |
| 414 // write attributes in the same order javac does, so we can test with byte for | |
| 415 // byte comparison | |
| 416 int attr_count = 0; | |
| 417 if (const_method->code_size() != 0) { | |
| 418 ++attr_count; // has Code attribute | |
| 419 } | |
| 420 if (const_method->has_checked_exceptions()) { | |
| 421 ++attr_count; // has Exceptions attribute | |
| 422 } | |
| 423 if (default_anno.not_null()) { | |
| 424 ++attr_count; // has AnnotationDefault attribute | |
| 425 } | |
| 426 // Deprecated attribute would go here | |
| 427 if (access_flags.is_synthetic()) { // FIXME | |
| 428 // ++attr_count; | |
| 429 } | |
| 430 if (generic_signature_index != 0) { | |
| 431 ++attr_count; | |
| 432 } | |
| 433 if (anno.not_null()) { | |
| 434 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
| 435 } | |
| 436 if (param_anno.not_null()) { | |
| 437 ++attr_count; // has RuntimeVisibleParameterAnnotations attribute | |
| 438 } | |
| 439 | |
| 440 write_u2(attr_count); | |
| 441 if (const_method->code_size() > 0) { | |
| 442 write_code_attribute(method); | |
| 443 } | |
| 444 if (const_method->has_checked_exceptions()) { | |
| 445 write_exceptions_attribute(const_method); | |
| 446 } | |
| 447 if (default_anno.not_null()) { | |
| 448 write_annotations_attribute("AnnotationDefault", default_anno); | |
| 449 } | |
| 450 // Deprecated attribute would go here | |
| 451 if (access_flags.is_synthetic()) { | |
| 452 // write_synthetic_attribute(); | |
| 453 } | |
| 454 if (generic_signature_index != 0) { | |
| 455 write_signature_attribute(generic_signature_index); | |
| 456 } | |
| 457 if (anno.not_null()) { | |
| 458 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
| 459 } | |
| 460 if (param_anno.not_null()) { | |
| 461 write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno); | |
| 462 } | |
| 463 } | |
| 464 | |
| 465 // Write the class attributes portion of ClassFile structure | |
| 466 // JVMSpec| u2 attributes_count; | |
| 467 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 468 void JvmtiClassFileReconstituter::write_class_attributes() { | |
| 469 u2 inner_classes_length = inner_classes_attribute_length(); | |
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470 Symbol* generic_signature = ikh()->generic_signature(); |
| 0 | 471 typeArrayHandle anno(thread(), ikh()->class_annotations()); |
| 472 | |
| 473 int attr_count = 0; | |
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474 if (generic_signature != NULL) { |
| 0 | 475 ++attr_count; |
| 476 } | |
| 477 if (ikh()->source_file_name() != NULL) { | |
| 478 ++attr_count; | |
| 479 } | |
| 480 if (ikh()->source_debug_extension() != NULL) { | |
| 481 ++attr_count; | |
| 482 } | |
| 483 if (inner_classes_length > 0) { | |
| 484 ++attr_count; | |
| 485 } | |
| 486 if (anno.not_null()) { | |
| 487 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
| 488 } | |
| 489 | |
| 490 write_u2(attr_count); | |
| 491 | |
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492 if (generic_signature != NULL) { |
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493 write_signature_attribute(symbol_to_cpool_index(generic_signature)); |
| 0 | 494 } |
| 495 if (ikh()->source_file_name() != NULL) { | |
| 496 write_source_file_attribute(); | |
| 497 } | |
| 498 if (ikh()->source_debug_extension() != NULL) { | |
| 499 write_source_debug_extension_attribute(); | |
| 500 } | |
| 501 if (inner_classes_length > 0) { | |
| 502 write_inner_classes_attribute(inner_classes_length); | |
| 503 } | |
| 504 if (anno.not_null()) { | |
| 505 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
| 506 } | |
| 507 } | |
| 508 | |
| 509 // Write the method information portion of ClassFile structure | |
| 510 // JVMSpec| u2 methods_count; | |
| 511 // JVMSpec| method_info methods[methods_count]; | |
| 512 void JvmtiClassFileReconstituter::write_method_infos() { | |
| 513 HandleMark hm(thread()); | |
| 514 objArrayHandle methods(thread(), ikh()->methods()); | |
| 515 int num_methods = methods->length(); | |
| 516 | |
| 517 write_u2(num_methods); | |
| 518 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 519 int index; | |
| 520 int original_index; | |
| 521 int* method_order = NEW_RESOURCE_ARRAY(int, num_methods); | |
| 522 | |
| 523 // invert the method order mapping | |
| 524 for (index = 0; index < num_methods; index++) { | |
| 525 original_index = ikh()->method_ordering()->int_at(index); | |
| 526 assert(original_index >= 0 && original_index < num_methods, | |
| 527 "invalid original method index"); | |
| 528 method_order[original_index] = index; | |
| 529 } | |
| 530 | |
| 531 // write in original order | |
| 532 for (original_index = 0; original_index < num_methods; original_index++) { | |
| 533 index = method_order[original_index]; | |
| 534 methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); | |
| 535 write_method_info(method); | |
| 536 } | |
| 537 } else { | |
| 538 // method order not preserved just dump the method infos | |
| 539 for (int index = 0; index < num_methods; index++) { | |
| 540 methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); | |
| 541 write_method_info(method); | |
| 542 } | |
| 543 } | |
| 544 } | |
| 545 | |
| 546 void JvmtiClassFileReconstituter::write_class_file_format() { | |
| 547 ReallocMark(); | |
| 548 | |
| 549 // JVMSpec| ClassFile { | |
| 550 // JVMSpec| u4 magic; | |
| 551 write_u4(0xCAFEBABE); | |
| 552 | |
| 553 // JVMSpec| u2 minor_version; | |
| 554 // JVMSpec| u2 major_version; | |
| 555 write_u2(ikh()->minor_version()); | |
| 556 u2 major = ikh()->major_version(); | |
| 557 write_u2(major); | |
| 558 | |
| 559 // JVMSpec| u2 constant_pool_count; | |
| 560 // JVMSpec| cp_info constant_pool[constant_pool_count-1]; | |
| 561 write_u2(cpool()->length()); | |
| 562 copy_cpool_bytes(writeable_address(cpool_size())); | |
| 563 | |
| 564 // JVMSpec| u2 access_flags; | |
| 565 write_u2(ikh()->access_flags().get_flags() & JVM_RECOGNIZED_CLASS_MODIFIERS); | |
| 566 | |
| 567 // JVMSpec| u2 this_class; | |
| 568 // JVMSpec| u2 super_class; | |
| 569 write_u2(class_symbol_to_cpool_index(ikh()->name())); | |
| 570 klassOop super_class = ikh()->super(); | |
| 571 write_u2(super_class == NULL? 0 : // zero for java.lang.Object | |
| 572 class_symbol_to_cpool_index(super_class->klass_part()->name())); | |
| 573 | |
| 574 // JVMSpec| u2 interfaces_count; | |
| 575 // JVMSpec| u2 interfaces[interfaces_count]; | |
| 576 objArrayHandle interfaces(thread(), ikh()->local_interfaces()); | |
| 577 int num_interfaces = interfaces->length(); | |
| 578 write_u2(num_interfaces); | |
| 579 for (int index = 0; index < num_interfaces; index++) { | |
| 580 HandleMark hm(thread()); | |
| 581 instanceKlassHandle iikh(thread(), klassOop(interfaces->obj_at(index))); | |
| 582 write_u2(class_symbol_to_cpool_index(iikh->name())); | |
| 583 } | |
| 584 | |
| 585 // JVMSpec| u2 fields_count; | |
| 586 // JVMSpec| field_info fields[fields_count]; | |
| 587 write_field_infos(); | |
| 588 | |
| 589 // JVMSpec| u2 methods_count; | |
| 590 // JVMSpec| method_info methods[methods_count]; | |
| 591 write_method_infos(); | |
| 592 | |
| 593 // JVMSpec| u2 attributes_count; | |
| 594 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 595 // JVMSpec| } /* end ClassFile 8? | |
| 596 write_class_attributes(); | |
| 597 } | |
| 598 | |
| 599 address JvmtiClassFileReconstituter::writeable_address(size_t size) { | |
| 600 size_t used_size = _buffer_ptr - _buffer; | |
| 601 if (size + used_size >= _buffer_size) { | |
| 602 // compute the new buffer size: must be at least twice as big as before | |
| 603 // plus whatever new is being used; then convert to nice clean block boundary | |
| 604 size_t new_buffer_size = (size + _buffer_size*2 + 1) / initial_buffer_size | |
| 605 * initial_buffer_size; | |
| 606 | |
| 607 // VM goes belly-up if the memory isn't available, so cannot do OOM processing | |
| 608 _buffer = REALLOC_RESOURCE_ARRAY(u1, _buffer, _buffer_size, new_buffer_size); | |
| 609 _buffer_size = new_buffer_size; | |
| 610 _buffer_ptr = _buffer + used_size; | |
| 611 } | |
| 612 u1* ret_ptr = _buffer_ptr; | |
| 613 _buffer_ptr += size; | |
| 614 return ret_ptr; | |
| 615 } | |
| 616 | |
| 617 void JvmtiClassFileReconstituter::write_attribute_name_index(const char* name) { | |
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618 TempNewSymbol sym = SymbolTable::probe(name, (int)strlen(name)); |
| 0 | 619 assert(sym != NULL, "attribute name symbol not found"); |
| 620 u2 attr_name_index = symbol_to_cpool_index(sym); | |
| 621 assert(attr_name_index != 0, "attribute name symbol not in constant pool"); | |
| 622 write_u2(attr_name_index); | |
| 623 } | |
| 624 | |
| 625 void JvmtiClassFileReconstituter::write_u1(u1 x) { | |
| 626 *writeable_address(1) = x; | |
| 627 } | |
| 628 | |
| 629 void JvmtiClassFileReconstituter::write_u2(u2 x) { | |
| 630 Bytes::put_Java_u2(writeable_address(2), x); | |
| 631 } | |
| 632 | |
| 633 void JvmtiClassFileReconstituter::write_u4(u4 x) { | |
| 634 Bytes::put_Java_u4(writeable_address(4), x); | |
| 635 } | |
| 636 | |
| 637 void JvmtiClassFileReconstituter::write_u8(u8 x) { | |
| 638 Bytes::put_Java_u8(writeable_address(8), x); | |
| 639 } | |
| 640 | |
| 641 void JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh, | |
| 642 unsigned char* bytecodes) { | |
| 643 // use a BytecodeStream to iterate over the bytecodes. JVM/fast bytecodes | |
| 644 // and the breakpoint bytecode are converted to their original bytecodes. | |
| 645 | |
| 646 BytecodeStream bs(mh); | |
| 647 | |
| 648 unsigned char* p = bytecodes; | |
| 649 Bytecodes::Code code; | |
| 650 bool is_rewritten = instanceKlass::cast(mh->method_holder())->is_rewritten(); | |
| 651 | |
| 652 while ((code = bs.next()) >= 0) { | |
| 653 assert(Bytecodes::is_java_code(code), "sanity check"); | |
| 654 assert(code != Bytecodes::_breakpoint, "sanity check"); | |
| 655 | |
| 656 // length of bytecode (mnemonic + operands) | |
| 657 address bcp = bs.bcp(); | |
| 1565 | 658 int len = bs.instruction_size(); |
| 0 | 659 assert(len > 0, "length must be > 0"); |
| 660 | |
| 661 // copy the bytecodes | |
| 662 *p = (unsigned char) (bs.is_wide()? Bytecodes::_wide : code); | |
| 663 if (len > 1) { | |
| 664 memcpy(p+1, bcp+1, len-1); | |
| 665 } | |
| 666 | |
| 667 // During linking the get/put and invoke instructions are rewritten | |
| 668 // with an index into the constant pool cache. The original constant | |
| 669 // pool index must be returned to caller. Rewrite the index. | |
| 670 if (is_rewritten && len >= 3) { | |
| 671 switch (code) { | |
| 672 case Bytecodes::_getstatic : // fall through | |
| 673 case Bytecodes::_putstatic : // fall through | |
| 674 case Bytecodes::_getfield : // fall through | |
| 675 case Bytecodes::_putfield : // fall through | |
| 676 case Bytecodes::_invokevirtual : // fall through | |
| 677 case Bytecodes::_invokespecial : // fall through | |
| 678 case Bytecodes::_invokestatic : // fall through | |
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679 case Bytecodes::_invokedynamic : // fall through |
| 0 | 680 case Bytecodes::_invokeinterface : |
| 681 assert(len == 3 || (code == Bytecodes::_invokeinterface && len ==5), | |
| 682 "sanity check"); | |
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683 int cpci = Bytes::get_native_u2(bcp+1); |
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684 bool is_invokedynamic = (EnableInvokeDynamic && code == Bytecodes::_invokedynamic); |
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685 if (is_invokedynamic) |
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686 cpci = Bytes::get_native_u4(bcp+1); |
| 0 | 687 // cache cannot be pre-fetched since some classes won't have it yet |
| 688 ConstantPoolCacheEntry* entry = | |
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689 mh->constants()->cache()->main_entry_at(cpci); |
| 0 | 690 int i = entry->constant_pool_index(); |
| 691 assert(i < mh->constants()->length(), "sanity check"); | |
| 692 Bytes::put_Java_u2((address)(p+1), (u2)i); // java byte ordering | |
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693 if (is_invokedynamic) *(p+3) = *(p+4) = 0; |
| 0 | 694 break; |
| 695 } | |
| 696 } | |
| 697 | |
| 698 p += len; | |
| 699 } | |
| 700 } |