Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiClassFileReconstituter.cpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | e9ff18c4ace7 |
| children | 3582bf76420e |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1579 | 2 * Copyright (c) 2005, 2010, 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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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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parents:
844
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changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
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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 | |
| 0 | 39 // FIXME: add Deprecated, LVT, LVTT attributes |
| 40 // FIXME: fix Synthetic attribute | |
| 41 // FIXME: per Serguei, add error return handling for constantPoolOopDesc::copy_cpool_bytes() | |
| 42 | |
| 43 | |
| 44 // Write the field information portion of ClassFile structure | |
| 45 // JVMSpec| u2 fields_count; | |
| 46 // JVMSpec| field_info fields[fields_count]; | |
| 47 void JvmtiClassFileReconstituter::write_field_infos() { | |
| 48 HandleMark hm(thread()); | |
| 49 typeArrayHandle fields(thread(), ikh()->fields()); | |
| 50 int fields_length = fields->length(); | |
| 51 int num_fields = fields_length / instanceKlass::next_offset; | |
| 52 objArrayHandle fields_anno(thread(), ikh()->fields_annotations()); | |
| 53 | |
| 54 write_u2(num_fields); | |
| 55 for (int index = 0; index < fields_length; index += instanceKlass::next_offset) { | |
| 56 AccessFlags access_flags; | |
| 57 int flags = fields->ushort_at(index + instanceKlass::access_flags_offset); | |
| 58 access_flags.set_flags(flags); | |
| 59 int name_index = fields->ushort_at(index + instanceKlass::name_index_offset); | |
| 60 int signature_index = fields->ushort_at(index + instanceKlass::signature_index_offset); | |
| 61 int initial_value_index = fields->ushort_at(index + instanceKlass::initval_index_offset); | |
| 62 guarantee(name_index != 0 && signature_index != 0, "bad constant pool index for field"); | |
| 63 int offset = ikh()->offset_from_fields( index ); | |
| 64 int generic_signature_index = | |
| 65 fields->ushort_at(index + instanceKlass::generic_signature_offset); | |
| 66 typeArrayHandle anno(thread(), fields_anno.not_null() ? | |
| 67 (typeArrayOop)(fields_anno->obj_at(index / instanceKlass::next_offset)) : | |
| 68 (typeArrayOop)NULL); | |
| 69 | |
| 70 // JVMSpec| field_info { | |
| 71 // JVMSpec| u2 access_flags; | |
| 72 // JVMSpec| u2 name_index; | |
| 73 // JVMSpec| u2 descriptor_index; | |
| 74 // JVMSpec| u2 attributes_count; | |
| 75 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 76 // JVMSpec| } | |
| 77 | |
| 78 write_u2(flags & JVM_RECOGNIZED_FIELD_MODIFIERS); | |
| 79 write_u2(name_index); | |
| 80 write_u2(signature_index); | |
| 81 int attr_count = 0; | |
| 82 if (initial_value_index != 0) { | |
| 83 ++attr_count; | |
| 84 } | |
| 85 if (access_flags.is_synthetic()) { | |
| 86 // ++attr_count; | |
| 87 } | |
| 88 if (generic_signature_index != 0) { | |
| 89 ++attr_count; | |
| 90 } | |
| 91 if (anno.not_null()) { | |
| 92 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
| 93 } | |
| 94 | |
| 95 write_u2(attr_count); | |
| 96 | |
| 97 if (initial_value_index != 0) { | |
| 98 write_attribute_name_index("ConstantValue"); | |
| 99 write_u4(2); //length always 2 | |
| 100 write_u2(initial_value_index); | |
| 101 } | |
| 102 if (access_flags.is_synthetic()) { | |
| 103 // write_synthetic_attribute(); | |
| 104 } | |
| 105 if (generic_signature_index != 0) { | |
| 106 write_signature_attribute(generic_signature_index); | |
| 107 } | |
| 108 if (anno.not_null()) { | |
| 109 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
| 110 } | |
| 111 } | |
| 112 } | |
| 113 | |
| 114 // Write Code attribute | |
| 115 // JVMSpec| Code_attribute { | |
| 116 // JVMSpec| u2 attribute_name_index; | |
| 117 // JVMSpec| u4 attribute_length; | |
| 118 // JVMSpec| u2 max_stack; | |
| 119 // JVMSpec| u2 max_locals; | |
| 120 // JVMSpec| u4 code_length; | |
| 121 // JVMSpec| u1 code[code_length]; | |
| 122 // JVMSpec| u2 exception_table_length; | |
| 123 // JVMSpec| { u2 start_pc; | |
| 124 // JVMSpec| u2 end_pc; | |
| 125 // JVMSpec| u2 handler_pc; | |
| 126 // JVMSpec| u2 catch_type; | |
| 127 // JVMSpec| } exception_table[exception_table_length]; | |
| 128 // JVMSpec| u2 attributes_count; | |
| 129 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 130 // JVMSpec| } | |
| 131 void JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) { | |
| 132 constMethodHandle const_method(thread(), method->constMethod()); | |
| 133 u2 line_num_cnt = 0; | |
| 134 int stackmap_len = 0; | |
| 135 | |
| 136 // compute number and length of attributes -- FIXME: for now no LVT | |
| 137 int attr_count = 0; | |
| 138 int attr_size = 0; | |
| 139 if (const_method->has_linenumber_table()) { | |
| 140 line_num_cnt = line_number_table_entries(method); | |
| 141 if (line_num_cnt != 0) { | |
| 142 ++attr_count; | |
| 143 // Compute the complete size of the line number table attribute: | |
| 144 // LineNumberTable_attribute { | |
| 145 // u2 attribute_name_index; | |
| 146 // u4 attribute_length; | |
| 147 // u2 line_number_table_length; | |
| 148 // { u2 start_pc; | |
| 149 // u2 line_number; | |
| 150 // } line_number_table[line_number_table_length]; | |
| 151 // } | |
| 152 attr_size += 2 + 4 + 2 + line_num_cnt * (2 + 2); | |
| 153 } | |
| 154 } | |
| 155 if (method->has_stackmap_table()) { | |
| 156 stackmap_len = method->stackmap_data()->length(); | |
| 157 if (stackmap_len != 0) { | |
| 158 ++attr_count; | |
| 159 // Compute the size of the stack map table attribute (VM stores raw): | |
| 160 // StackMapTable_attribute { | |
| 161 // u2 attribute_name_index; | |
| 162 // u4 attribute_length; | |
| 163 // u2 number_of_entries; | |
| 164 // stack_map_frame_entries[number_of_entries]; | |
| 165 // } | |
| 166 attr_size += 2 + 4 + stackmap_len; | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 typeArrayHandle exception_table(thread(), const_method->exception_table()); | |
| 171 int exception_table_length = exception_table->length(); | |
| 172 int exception_table_entries = exception_table_length / 4; | |
| 173 int code_size = const_method->code_size(); | |
| 174 int size = | |
| 175 2+2+4 + // max_stack, max_locals, code_length | |
| 176 code_size + // code | |
| 177 2 + // exception_table_length | |
| 178 (2+2+2+2) * exception_table_entries + // exception_table | |
| 179 2 + // attributes_count | |
| 180 attr_size; // attributes | |
| 181 | |
| 182 write_attribute_name_index("Code"); | |
| 183 write_u4(size); | |
| 184 write_u2(method->max_stack()); | |
| 185 write_u2(method->max_locals()); | |
| 186 write_u4(code_size); | |
| 187 copy_bytecodes(method, (unsigned char*)writeable_address(code_size)); | |
| 188 write_u2(exception_table_entries); | |
| 189 for (int index = 0; index < exception_table_length; ) { | |
| 190 write_u2(exception_table->int_at(index++)); | |
| 191 write_u2(exception_table->int_at(index++)); | |
| 192 write_u2(exception_table->int_at(index++)); | |
| 193 write_u2(exception_table->int_at(index++)); | |
| 194 } | |
| 195 write_u2(attr_count); | |
| 196 if (line_num_cnt != 0) { | |
| 197 write_line_number_table_attribute(method, line_num_cnt); | |
| 198 } | |
| 199 if (stackmap_len != 0) { | |
| 200 write_stackmap_table_attribute(method, stackmap_len); | |
| 201 } | |
| 202 | |
| 203 // FIXME: write LVT attribute | |
| 204 } | |
| 205 | |
| 206 // Write Exceptions attribute | |
| 207 // JVMSpec| Exceptions_attribute { | |
| 208 // JVMSpec| u2 attribute_name_index; | |
| 209 // JVMSpec| u4 attribute_length; | |
| 210 // JVMSpec| u2 number_of_exceptions; | |
| 211 // JVMSpec| u2 exception_index_table[number_of_exceptions]; | |
| 212 // JVMSpec| } | |
| 213 void JvmtiClassFileReconstituter::write_exceptions_attribute(constMethodHandle const_method) { | |
| 214 CheckedExceptionElement* checked_exceptions = const_method->checked_exceptions_start(); | |
| 215 int checked_exceptions_length = const_method->checked_exceptions_length(); | |
| 216 int size = | |
| 217 2 + // number_of_exceptions | |
| 218 2 * checked_exceptions_length; // exception_index_table | |
| 219 | |
| 220 write_attribute_name_index("Exceptions"); | |
| 221 write_u4(size); | |
| 222 write_u2(checked_exceptions_length); | |
| 223 for (int index = 0; index < checked_exceptions_length; index++) { | |
| 224 write_u2(checked_exceptions[index].class_cp_index); | |
| 225 } | |
| 226 } | |
| 227 | |
| 228 // Write SourceFile attribute | |
| 229 // JVMSpec| SourceFile_attribute { | |
| 230 // JVMSpec| u2 attribute_name_index; | |
| 231 // JVMSpec| u4 attribute_length; | |
| 232 // JVMSpec| u2 sourcefile_index; | |
| 233 // JVMSpec| } | |
| 234 void JvmtiClassFileReconstituter::write_source_file_attribute() { | |
| 235 assert(ikh()->source_file_name() != NULL, "caller must check"); | |
| 236 | |
| 237 write_attribute_name_index("SourceFile"); | |
| 238 write_u4(2); // always length 2 | |
| 239 write_u2(symbol_to_cpool_index(ikh()->source_file_name())); | |
| 240 } | |
| 241 | |
| 242 // Write SourceDebugExtension attribute | |
| 243 // JSR45| SourceDebugExtension_attribute { | |
| 244 // JSR45| u2 attribute_name_index; | |
| 245 // JSR45| u4 attribute_length; | |
| 246 // JSR45| u2 sourcefile_index; | |
| 247 // JSR45| } | |
| 248 void JvmtiClassFileReconstituter::write_source_debug_extension_attribute() { | |
| 249 assert(ikh()->source_debug_extension() != NULL, "caller must check"); | |
| 250 | |
| 251 write_attribute_name_index("SourceDebugExtension"); | |
| 252 write_u4(2); // always length 2 | |
| 253 write_u2(symbol_to_cpool_index(ikh()->source_debug_extension())); | |
| 254 } | |
| 255 | |
| 256 // Write (generic) Signature attribute | |
| 257 // JVMSpec| Signature_attribute { | |
| 258 // JVMSpec| u2 attribute_name_index; | |
| 259 // JVMSpec| u4 attribute_length; | |
| 260 // JVMSpec| u2 signature_index; | |
| 261 // JVMSpec| } | |
| 262 void JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) { | |
| 263 write_attribute_name_index("Signature"); | |
| 264 write_u4(2); // always length 2 | |
| 265 write_u2(generic_signature_index); | |
| 266 } | |
| 267 | |
| 268 // Compute the number of entries in the InnerClasses attribute | |
| 269 u2 JvmtiClassFileReconstituter::inner_classes_attribute_length() { | |
| 270 typeArrayOop inner_class_list = ikh()->inner_classes(); | |
| 271 return (inner_class_list == NULL) ? 0 : inner_class_list->length(); | |
| 272 } | |
| 273 | |
| 274 // Write an annotation attribute. The VM stores them in raw form, so all we need | |
| 275 // to do is add the attrubute name and fill in the length. | |
| 276 // JSR202| *Annotations_attribute { | |
| 277 // JSR202| u2 attribute_name_index; | |
| 278 // JSR202| u4 attribute_length; | |
| 279 // JSR202| ... | |
| 280 // JSR202| } | |
| 281 void JvmtiClassFileReconstituter::write_annotations_attribute(const char* attr_name, | |
| 282 typeArrayHandle annos) { | |
| 283 u4 length = annos->length(); | |
| 284 write_attribute_name_index(attr_name); | |
| 285 write_u4(length); | |
| 286 memcpy(writeable_address(length), annos->byte_at_addr(0), length); | |
| 287 } | |
| 288 | |
| 289 | |
| 290 // Write InnerClasses attribute | |
| 291 // JVMSpec| InnerClasses_attribute { | |
| 292 // JVMSpec| u2 attribute_name_index; | |
| 293 // JVMSpec| u4 attribute_length; | |
| 294 // JVMSpec| u2 number_of_classes; | |
| 295 // JVMSpec| { u2 inner_class_info_index; | |
| 296 // JVMSpec| u2 outer_class_info_index; | |
| 297 // JVMSpec| u2 inner_name_index; | |
| 298 // JVMSpec| u2 inner_class_access_flags; | |
| 299 // JVMSpec| } classes[number_of_classes]; | |
| 300 // JVMSpec| } | |
| 301 void JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) { | |
| 302 typeArrayOop inner_class_list = ikh()->inner_classes(); | |
| 303 guarantee(inner_class_list != NULL && inner_class_list->length() == length, | |
| 304 "caller must check"); | |
| 305 typeArrayHandle inner_class_list_h(thread(), inner_class_list); | |
| 306 assert (length % instanceKlass::inner_class_next_offset == 0, "just checking"); | |
| 307 u2 entry_count = length / instanceKlass::inner_class_next_offset; | |
| 308 u4 size = 2 + entry_count * (2+2+2+2); | |
| 309 | |
| 310 write_attribute_name_index("InnerClasses"); | |
| 311 write_u4(size); | |
| 312 write_u2(entry_count); | |
| 313 for (int i = 0; i < length; i += instanceKlass::inner_class_next_offset) { | |
| 314 write_u2(inner_class_list_h->ushort_at( | |
| 315 i + instanceKlass::inner_class_inner_class_info_offset)); | |
| 316 write_u2(inner_class_list_h->ushort_at( | |
| 317 i + instanceKlass::inner_class_outer_class_info_offset)); | |
| 318 write_u2(inner_class_list_h->ushort_at( | |
| 319 i + instanceKlass::inner_class_inner_name_offset)); | |
| 320 write_u2(inner_class_list_h->ushort_at( | |
| 321 i + instanceKlass::inner_class_access_flags_offset)); | |
| 322 } | |
| 323 } | |
| 324 | |
| 325 // Write Synthetic attribute | |
| 326 // JVMSpec| Synthetic_attribute { | |
| 327 // JVMSpec| u2 attribute_name_index; | |
| 328 // JVMSpec| u4 attribute_length; | |
| 329 // JVMSpec| } | |
| 330 void JvmtiClassFileReconstituter::write_synthetic_attribute() { | |
| 331 write_attribute_name_index("Synthetic"); | |
| 332 write_u4(0); //length always zero | |
| 333 } | |
| 334 | |
| 335 // Compute size of LineNumberTable | |
| 336 u2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) { | |
| 337 // The line number table is compressed so we don't know how big it is until decompressed. | |
| 338 // Decompression is really fast so we just do it twice. | |
| 339 u2 num_entries = 0; | |
| 340 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
| 341 while (stream.read_pair()) { | |
| 342 num_entries++; | |
| 343 } | |
| 344 return num_entries; | |
| 345 } | |
| 346 | |
| 347 // Write LineNumberTable attribute | |
| 348 // JVMSpec| LineNumberTable_attribute { | |
| 349 // JVMSpec| u2 attribute_name_index; | |
| 350 // JVMSpec| u4 attribute_length; | |
| 351 // JVMSpec| u2 line_number_table_length; | |
| 352 // JVMSpec| { u2 start_pc; | |
| 353 // JVMSpec| u2 line_number; | |
| 354 // JVMSpec| } line_number_table[line_number_table_length]; | |
| 355 // JVMSpec| } | |
| 356 void JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method, | |
| 357 u2 num_entries) { | |
| 358 | |
| 359 write_attribute_name_index("LineNumberTable"); | |
| 360 write_u4(2 + num_entries * (2 + 2)); | |
| 361 write_u2(num_entries); | |
| 362 | |
| 363 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
| 364 while (stream.read_pair()) { | |
| 365 write_u2(stream.bci()); | |
| 366 write_u2(stream.line()); | |
| 367 } | |
| 368 } | |
| 369 | |
| 370 // Write stack map table attribute | |
| 371 // JSR-202| StackMapTable_attribute { | |
| 372 // JSR-202| u2 attribute_name_index; | |
| 373 // JSR-202| u4 attribute_length; | |
| 374 // JSR-202| u2 number_of_entries; | |
| 375 // JSR-202| stack_map_frame_entries[number_of_entries]; | |
| 376 // JSR-202| } | |
| 377 void JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method, | |
| 378 int stackmap_len) { | |
| 379 | |
| 380 write_attribute_name_index("StackMapTable"); | |
| 381 write_u4(stackmap_len); | |
| 382 memcpy( | |
| 383 writeable_address(stackmap_len), | |
| 384 (void*)(method->stackmap_data()->byte_at_addr(0)), | |
| 385 stackmap_len); | |
| 386 } | |
| 387 | |
| 388 // Write one method_info structure | |
| 389 // JVMSpec| method_info { | |
| 390 // JVMSpec| u2 access_flags; | |
| 391 // JVMSpec| u2 name_index; | |
| 392 // JVMSpec| u2 descriptor_index; | |
| 393 // JVMSpec| u2 attributes_count; | |
| 394 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 395 // JVMSpec| } | |
| 396 void JvmtiClassFileReconstituter::write_method_info(methodHandle method) { | |
| 397 AccessFlags access_flags = method->access_flags(); | |
| 398 constMethodHandle const_method(thread(), method->constMethod()); | |
| 399 u2 generic_signature_index = const_method->generic_signature_index(); | |
| 400 typeArrayHandle anno(thread(), method->annotations()); | |
| 401 typeArrayHandle param_anno(thread(), method->parameter_annotations()); | |
| 402 typeArrayHandle default_anno(thread(), method->annotation_default()); | |
| 403 | |
| 404 write_u2(access_flags.get_flags() & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
| 405 write_u2(const_method->name_index()); | |
| 406 write_u2(const_method->signature_index()); | |
| 407 | |
| 408 // write attributes in the same order javac does, so we can test with byte for | |
| 409 // byte comparison | |
| 410 int attr_count = 0; | |
| 411 if (const_method->code_size() != 0) { | |
| 412 ++attr_count; // has Code attribute | |
| 413 } | |
| 414 if (const_method->has_checked_exceptions()) { | |
| 415 ++attr_count; // has Exceptions attribute | |
| 416 } | |
| 417 if (default_anno.not_null()) { | |
| 418 ++attr_count; // has AnnotationDefault attribute | |
| 419 } | |
| 420 // Deprecated attribute would go here | |
| 421 if (access_flags.is_synthetic()) { // FIXME | |
| 422 // ++attr_count; | |
| 423 } | |
| 424 if (generic_signature_index != 0) { | |
| 425 ++attr_count; | |
| 426 } | |
| 427 if (anno.not_null()) { | |
| 428 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
| 429 } | |
| 430 if (param_anno.not_null()) { | |
| 431 ++attr_count; // has RuntimeVisibleParameterAnnotations attribute | |
| 432 } | |
| 433 | |
| 434 write_u2(attr_count); | |
| 435 if (const_method->code_size() > 0) { | |
| 436 write_code_attribute(method); | |
| 437 } | |
| 438 if (const_method->has_checked_exceptions()) { | |
| 439 write_exceptions_attribute(const_method); | |
| 440 } | |
| 441 if (default_anno.not_null()) { | |
| 442 write_annotations_attribute("AnnotationDefault", default_anno); | |
| 443 } | |
| 444 // Deprecated attribute would go here | |
| 445 if (access_flags.is_synthetic()) { | |
| 446 // write_synthetic_attribute(); | |
| 447 } | |
| 448 if (generic_signature_index != 0) { | |
| 449 write_signature_attribute(generic_signature_index); | |
| 450 } | |
| 451 if (anno.not_null()) { | |
| 452 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
| 453 } | |
| 454 if (param_anno.not_null()) { | |
| 455 write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno); | |
| 456 } | |
| 457 } | |
| 458 | |
| 459 // Write the class attributes portion of ClassFile structure | |
| 460 // JVMSpec| u2 attributes_count; | |
| 461 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 462 void JvmtiClassFileReconstituter::write_class_attributes() { | |
| 463 u2 inner_classes_length = inner_classes_attribute_length(); | |
| 464 symbolHandle generic_signature(thread(), ikh()->generic_signature()); | |
| 465 typeArrayHandle anno(thread(), ikh()->class_annotations()); | |
| 466 | |
| 467 int attr_count = 0; | |
| 468 if (generic_signature() != NULL) { | |
| 469 ++attr_count; | |
| 470 } | |
| 471 if (ikh()->source_file_name() != NULL) { | |
| 472 ++attr_count; | |
| 473 } | |
| 474 if (ikh()->source_debug_extension() != NULL) { | |
| 475 ++attr_count; | |
| 476 } | |
| 477 if (inner_classes_length > 0) { | |
| 478 ++attr_count; | |
| 479 } | |
| 480 if (anno.not_null()) { | |
| 481 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
| 482 } | |
| 483 | |
| 484 write_u2(attr_count); | |
| 485 | |
| 486 if (generic_signature() != NULL) { | |
| 487 write_signature_attribute(symbol_to_cpool_index(generic_signature())); | |
| 488 } | |
| 489 if (ikh()->source_file_name() != NULL) { | |
| 490 write_source_file_attribute(); | |
| 491 } | |
| 492 if (ikh()->source_debug_extension() != NULL) { | |
| 493 write_source_debug_extension_attribute(); | |
| 494 } | |
| 495 if (inner_classes_length > 0) { | |
| 496 write_inner_classes_attribute(inner_classes_length); | |
| 497 } | |
| 498 if (anno.not_null()) { | |
| 499 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
| 500 } | |
| 501 } | |
| 502 | |
| 503 // Write the method information portion of ClassFile structure | |
| 504 // JVMSpec| u2 methods_count; | |
| 505 // JVMSpec| method_info methods[methods_count]; | |
| 506 void JvmtiClassFileReconstituter::write_method_infos() { | |
| 507 HandleMark hm(thread()); | |
| 508 objArrayHandle methods(thread(), ikh()->methods()); | |
| 509 int num_methods = methods->length(); | |
| 510 | |
| 511 write_u2(num_methods); | |
| 512 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 513 int index; | |
| 514 int original_index; | |
| 515 int* method_order = NEW_RESOURCE_ARRAY(int, num_methods); | |
| 516 | |
| 517 // invert the method order mapping | |
| 518 for (index = 0; index < num_methods; index++) { | |
| 519 original_index = ikh()->method_ordering()->int_at(index); | |
| 520 assert(original_index >= 0 && original_index < num_methods, | |
| 521 "invalid original method index"); | |
| 522 method_order[original_index] = index; | |
| 523 } | |
| 524 | |
| 525 // write in original order | |
| 526 for (original_index = 0; original_index < num_methods; original_index++) { | |
| 527 index = method_order[original_index]; | |
| 528 methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); | |
| 529 write_method_info(method); | |
| 530 } | |
| 531 } else { | |
| 532 // method order not preserved just dump the method infos | |
| 533 for (int index = 0; index < num_methods; index++) { | |
| 534 methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); | |
| 535 write_method_info(method); | |
| 536 } | |
| 537 } | |
| 538 } | |
| 539 | |
| 540 void JvmtiClassFileReconstituter::write_class_file_format() { | |
| 541 ReallocMark(); | |
| 542 | |
| 543 // JVMSpec| ClassFile { | |
| 544 // JVMSpec| u4 magic; | |
| 545 write_u4(0xCAFEBABE); | |
| 546 | |
| 547 // JVMSpec| u2 minor_version; | |
| 548 // JVMSpec| u2 major_version; | |
| 549 write_u2(ikh()->minor_version()); | |
| 550 u2 major = ikh()->major_version(); | |
| 551 write_u2(major); | |
| 552 | |
| 553 // JVMSpec| u2 constant_pool_count; | |
| 554 // JVMSpec| cp_info constant_pool[constant_pool_count-1]; | |
| 555 write_u2(cpool()->length()); | |
| 556 copy_cpool_bytes(writeable_address(cpool_size())); | |
| 557 | |
| 558 // JVMSpec| u2 access_flags; | |
| 559 write_u2(ikh()->access_flags().get_flags() & JVM_RECOGNIZED_CLASS_MODIFIERS); | |
| 560 | |
| 561 // JVMSpec| u2 this_class; | |
| 562 // JVMSpec| u2 super_class; | |
| 563 write_u2(class_symbol_to_cpool_index(ikh()->name())); | |
| 564 klassOop super_class = ikh()->super(); | |
| 565 write_u2(super_class == NULL? 0 : // zero for java.lang.Object | |
| 566 class_symbol_to_cpool_index(super_class->klass_part()->name())); | |
| 567 | |
| 568 // JVMSpec| u2 interfaces_count; | |
| 569 // JVMSpec| u2 interfaces[interfaces_count]; | |
| 570 objArrayHandle interfaces(thread(), ikh()->local_interfaces()); | |
| 571 int num_interfaces = interfaces->length(); | |
| 572 write_u2(num_interfaces); | |
| 573 for (int index = 0; index < num_interfaces; index++) { | |
| 574 HandleMark hm(thread()); | |
| 575 instanceKlassHandle iikh(thread(), klassOop(interfaces->obj_at(index))); | |
| 576 write_u2(class_symbol_to_cpool_index(iikh->name())); | |
| 577 } | |
| 578 | |
| 579 // JVMSpec| u2 fields_count; | |
| 580 // JVMSpec| field_info fields[fields_count]; | |
| 581 write_field_infos(); | |
| 582 | |
| 583 // JVMSpec| u2 methods_count; | |
| 584 // JVMSpec| method_info methods[methods_count]; | |
| 585 write_method_infos(); | |
| 586 | |
| 587 // JVMSpec| u2 attributes_count; | |
| 588 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 589 // JVMSpec| } /* end ClassFile 8? | |
| 590 write_class_attributes(); | |
| 591 } | |
| 592 | |
| 593 address JvmtiClassFileReconstituter::writeable_address(size_t size) { | |
| 594 size_t used_size = _buffer_ptr - _buffer; | |
| 595 if (size + used_size >= _buffer_size) { | |
| 596 // compute the new buffer size: must be at least twice as big as before | |
| 597 // plus whatever new is being used; then convert to nice clean block boundary | |
| 598 size_t new_buffer_size = (size + _buffer_size*2 + 1) / initial_buffer_size | |
| 599 * initial_buffer_size; | |
| 600 | |
| 601 // VM goes belly-up if the memory isn't available, so cannot do OOM processing | |
| 602 _buffer = REALLOC_RESOURCE_ARRAY(u1, _buffer, _buffer_size, new_buffer_size); | |
| 603 _buffer_size = new_buffer_size; | |
| 604 _buffer_ptr = _buffer + used_size; | |
| 605 } | |
| 606 u1* ret_ptr = _buffer_ptr; | |
| 607 _buffer_ptr += size; | |
| 608 return ret_ptr; | |
| 609 } | |
| 610 | |
| 611 void JvmtiClassFileReconstituter::write_attribute_name_index(const char* name) { | |
| 612 unsigned int hash_ignored; | |
| 613 symbolOop sym = SymbolTable::lookup_only(name, (int)strlen(name), hash_ignored); | |
| 614 assert(sym != NULL, "attribute name symbol not found"); | |
| 615 u2 attr_name_index = symbol_to_cpool_index(sym); | |
| 616 assert(attr_name_index != 0, "attribute name symbol not in constant pool"); | |
| 617 write_u2(attr_name_index); | |
| 618 } | |
| 619 | |
| 620 void JvmtiClassFileReconstituter::write_u1(u1 x) { | |
| 621 *writeable_address(1) = x; | |
| 622 } | |
| 623 | |
| 624 void JvmtiClassFileReconstituter::write_u2(u2 x) { | |
| 625 Bytes::put_Java_u2(writeable_address(2), x); | |
| 626 } | |
| 627 | |
| 628 void JvmtiClassFileReconstituter::write_u4(u4 x) { | |
| 629 Bytes::put_Java_u4(writeable_address(4), x); | |
| 630 } | |
| 631 | |
| 632 void JvmtiClassFileReconstituter::write_u8(u8 x) { | |
| 633 Bytes::put_Java_u8(writeable_address(8), x); | |
| 634 } | |
| 635 | |
| 636 void JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh, | |
| 637 unsigned char* bytecodes) { | |
| 638 // use a BytecodeStream to iterate over the bytecodes. JVM/fast bytecodes | |
| 639 // and the breakpoint bytecode are converted to their original bytecodes. | |
| 640 | |
| 641 BytecodeStream bs(mh); | |
| 642 | |
| 643 unsigned char* p = bytecodes; | |
| 644 Bytecodes::Code code; | |
| 645 bool is_rewritten = instanceKlass::cast(mh->method_holder())->is_rewritten(); | |
| 646 | |
| 647 while ((code = bs.next()) >= 0) { | |
| 648 assert(Bytecodes::is_java_code(code), "sanity check"); | |
| 649 assert(code != Bytecodes::_breakpoint, "sanity check"); | |
| 650 | |
| 651 // length of bytecode (mnemonic + operands) | |
| 652 address bcp = bs.bcp(); | |
| 1565 | 653 int len = bs.instruction_size(); |
| 0 | 654 assert(len > 0, "length must be > 0"); |
| 655 | |
| 656 // copy the bytecodes | |
| 657 *p = (unsigned char) (bs.is_wide()? Bytecodes::_wide : code); | |
| 658 if (len > 1) { | |
| 659 memcpy(p+1, bcp+1, len-1); | |
| 660 } | |
| 661 | |
| 662 // During linking the get/put and invoke instructions are rewritten | |
| 663 // with an index into the constant pool cache. The original constant | |
| 664 // pool index must be returned to caller. Rewrite the index. | |
| 665 if (is_rewritten && len >= 3) { | |
| 666 switch (code) { | |
| 667 case Bytecodes::_getstatic : // fall through | |
| 668 case Bytecodes::_putstatic : // fall through | |
| 669 case Bytecodes::_getfield : // fall through | |
| 670 case Bytecodes::_putfield : // fall through | |
| 671 case Bytecodes::_invokevirtual : // fall through | |
| 672 case Bytecodes::_invokespecial : // fall through | |
| 673 case Bytecodes::_invokestatic : // fall through | |
|
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674 case Bytecodes::_invokedynamic : // fall through |
| 0 | 675 case Bytecodes::_invokeinterface : |
| 676 assert(len == 3 || (code == Bytecodes::_invokeinterface && len ==5), | |
| 677 "sanity check"); | |
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678 int cpci = Bytes::get_native_u2(bcp+1); |
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679 bool is_invokedynamic = (EnableInvokeDynamic && code == Bytecodes::_invokedynamic); |
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680 if (is_invokedynamic) |
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681 cpci = Bytes::get_native_u4(bcp+1); |
| 0 | 682 // cache cannot be pre-fetched since some classes won't have it yet |
| 683 ConstantPoolCacheEntry* entry = | |
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684 mh->constants()->cache()->main_entry_at(cpci); |
| 0 | 685 int i = entry->constant_pool_index(); |
| 686 assert(i < mh->constants()->length(), "sanity check"); | |
| 687 Bytes::put_Java_u2((address)(p+1), (u2)i); // java byte ordering | |
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688 if (is_invokedynamic) *(p+3) = *(p+4) = 0; |
| 0 | 689 break; |
| 690 } | |
| 691 } | |
| 692 | |
| 693 p += len; | |
| 694 } | |
| 695 } |