Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiClassFileReconstituter.cpp @ 5967:f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
Summary: Fold instanceKlass::_enclosing_method_class_index and instanceKlass::_enclosing_method_method_index into the instanceKlass::_inner_classes array.
Reviewed-by: never, coleenp
Contributed-by: Jiangli Zhou <jiangli.zhou@oracle.com>
| author | jiangli |
|---|---|
| date | Tue, 13 Mar 2012 13:50:48 -0400 |
| parents | ff29ce866f23 |
| children | 04ade88d9712 8150fa46d2ed |
| 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 |
| 48 // FIXME: per Serguei, add error return handling for constantPoolOopDesc::copy_cpool_bytes() | |
| 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()); | |
| 56 objArrayHandle fields_anno(thread(), ikh()->fields_annotations()); | |
| 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(); | |
| 0 | 70 typeArrayHandle anno(thread(), fields_anno.not_null() ? |
| 3938 | 71 (typeArrayOop)(fields_anno->obj_at(fs.index())) : |
| 0 | 72 (typeArrayOop)NULL); |
| 73 | |
| 74 // JVMSpec| field_info { | |
| 75 // JVMSpec| u2 access_flags; | |
| 76 // JVMSpec| u2 name_index; | |
| 77 // JVMSpec| u2 descriptor_index; | |
| 78 // JVMSpec| u2 attributes_count; | |
| 79 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 80 // JVMSpec| } | |
| 81 | |
| 3938 | 82 write_u2(access_flags.as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); |
| 0 | 83 write_u2(name_index); |
| 84 write_u2(signature_index); | |
| 85 int attr_count = 0; | |
| 86 if (initial_value_index != 0) { | |
| 87 ++attr_count; | |
| 88 } | |
| 89 if (access_flags.is_synthetic()) { | |
| 90 // ++attr_count; | |
| 91 } | |
| 92 if (generic_signature_index != 0) { | |
| 93 ++attr_count; | |
| 94 } | |
| 95 if (anno.not_null()) { | |
| 96 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
| 97 } | |
| 98 | |
| 99 write_u2(attr_count); | |
| 100 | |
| 101 if (initial_value_index != 0) { | |
| 102 write_attribute_name_index("ConstantValue"); | |
| 103 write_u4(2); //length always 2 | |
| 104 write_u2(initial_value_index); | |
| 105 } | |
| 106 if (access_flags.is_synthetic()) { | |
| 107 // write_synthetic_attribute(); | |
| 108 } | |
| 109 if (generic_signature_index != 0) { | |
| 110 write_signature_attribute(generic_signature_index); | |
| 111 } | |
| 112 if (anno.not_null()) { | |
| 113 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
| 114 } | |
| 115 } | |
| 116 } | |
| 117 | |
| 118 // Write Code attribute | |
| 119 // JVMSpec| Code_attribute { | |
| 120 // JVMSpec| u2 attribute_name_index; | |
| 121 // JVMSpec| u4 attribute_length; | |
| 122 // JVMSpec| u2 max_stack; | |
| 123 // JVMSpec| u2 max_locals; | |
| 124 // JVMSpec| u4 code_length; | |
| 125 // JVMSpec| u1 code[code_length]; | |
| 126 // JVMSpec| u2 exception_table_length; | |
| 127 // JVMSpec| { u2 start_pc; | |
| 128 // JVMSpec| u2 end_pc; | |
| 129 // JVMSpec| u2 handler_pc; | |
| 130 // JVMSpec| u2 catch_type; | |
| 131 // JVMSpec| } exception_table[exception_table_length]; | |
| 132 // JVMSpec| u2 attributes_count; | |
| 133 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 134 // JVMSpec| } | |
| 135 void JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) { | |
| 136 constMethodHandle const_method(thread(), method->constMethod()); | |
| 137 u2 line_num_cnt = 0; | |
| 138 int stackmap_len = 0; | |
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139 int local_variable_table_length = 0; |
| 0 | 140 |
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141 // compute number and length of attributes |
| 0 | 142 int attr_count = 0; |
| 143 int attr_size = 0; | |
| 144 if (const_method->has_linenumber_table()) { | |
| 145 line_num_cnt = line_number_table_entries(method); | |
| 146 if (line_num_cnt != 0) { | |
| 147 ++attr_count; | |
| 148 // Compute the complete size of the line number table attribute: | |
| 149 // LineNumberTable_attribute { | |
| 150 // u2 attribute_name_index; | |
| 151 // u4 attribute_length; | |
| 152 // u2 line_number_table_length; | |
| 153 // { u2 start_pc; | |
| 154 // u2 line_number; | |
| 155 // } line_number_table[line_number_table_length]; | |
| 156 // } | |
| 157 attr_size += 2 + 4 + 2 + line_num_cnt * (2 + 2); | |
| 158 } | |
| 159 } | |
| 160 if (method->has_stackmap_table()) { | |
| 161 stackmap_len = method->stackmap_data()->length(); | |
| 162 if (stackmap_len != 0) { | |
| 163 ++attr_count; | |
| 164 // Compute the size of the stack map table attribute (VM stores raw): | |
| 165 // StackMapTable_attribute { | |
| 166 // u2 attribute_name_index; | |
| 167 // u4 attribute_length; | |
| 168 // u2 number_of_entries; | |
| 169 // stack_map_frame_entries[number_of_entries]; | |
| 170 // } | |
| 171 attr_size += 2 + 4 + stackmap_len; | |
| 172 } | |
| 173 } | |
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174 if (method->has_localvariable_table()) { |
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175 local_variable_table_length = method->localvariable_table_length(); |
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176 ++attr_count; |
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177 if (local_variable_table_length != 0) { |
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178 // Compute the size of the local variable table attribute (VM stores raw): |
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179 // LocalVariableTable_attribute { |
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180 // u2 attribute_name_index; |
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181 // u4 attribute_length; |
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182 // u2 local_variable_table_length; |
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183 // { |
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184 // u2 start_pc; |
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185 // u2 length; |
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186 // u2 name_index; |
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187 // u2 descriptor_index; |
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188 // u2 index; |
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189 // } |
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190 attr_size += 2 + 4 + 2 + local_variable_table_length * (2 + 2 + 2 + 2 + 2); |
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191 } |
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192 } |
| 0 | 193 |
| 194 typeArrayHandle exception_table(thread(), const_method->exception_table()); | |
| 195 int exception_table_length = exception_table->length(); | |
| 196 int exception_table_entries = exception_table_length / 4; | |
| 197 int code_size = const_method->code_size(); | |
| 198 int size = | |
| 199 2+2+4 + // max_stack, max_locals, code_length | |
| 200 code_size + // code | |
| 201 2 + // exception_table_length | |
| 202 (2+2+2+2) * exception_table_entries + // exception_table | |
| 203 2 + // attributes_count | |
| 204 attr_size; // attributes | |
| 205 | |
| 206 write_attribute_name_index("Code"); | |
| 207 write_u4(size); | |
| 208 write_u2(method->max_stack()); | |
| 209 write_u2(method->max_locals()); | |
| 210 write_u4(code_size); | |
| 211 copy_bytecodes(method, (unsigned char*)writeable_address(code_size)); | |
| 212 write_u2(exception_table_entries); | |
| 213 for (int index = 0; index < exception_table_length; ) { | |
| 214 write_u2(exception_table->int_at(index++)); | |
| 215 write_u2(exception_table->int_at(index++)); | |
| 216 write_u2(exception_table->int_at(index++)); | |
| 217 write_u2(exception_table->int_at(index++)); | |
| 218 } | |
| 219 write_u2(attr_count); | |
| 220 if (line_num_cnt != 0) { | |
| 221 write_line_number_table_attribute(method, line_num_cnt); | |
| 222 } | |
| 223 if (stackmap_len != 0) { | |
| 224 write_stackmap_table_attribute(method, stackmap_len); | |
| 225 } | |
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226 if (local_variable_table_length != 0) { |
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227 write_local_variable_table_attribute(method, local_variable_table_length); |
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228 } |
| 0 | 229 } |
| 230 | |
| 231 // Write Exceptions attribute | |
| 232 // JVMSpec| Exceptions_attribute { | |
| 233 // JVMSpec| u2 attribute_name_index; | |
| 234 // JVMSpec| u4 attribute_length; | |
| 235 // JVMSpec| u2 number_of_exceptions; | |
| 236 // JVMSpec| u2 exception_index_table[number_of_exceptions]; | |
| 237 // JVMSpec| } | |
| 238 void JvmtiClassFileReconstituter::write_exceptions_attribute(constMethodHandle const_method) { | |
| 239 CheckedExceptionElement* checked_exceptions = const_method->checked_exceptions_start(); | |
| 240 int checked_exceptions_length = const_method->checked_exceptions_length(); | |
| 241 int size = | |
| 242 2 + // number_of_exceptions | |
| 243 2 * checked_exceptions_length; // exception_index_table | |
| 244 | |
| 245 write_attribute_name_index("Exceptions"); | |
| 246 write_u4(size); | |
| 247 write_u2(checked_exceptions_length); | |
| 248 for (int index = 0; index < checked_exceptions_length; index++) { | |
| 249 write_u2(checked_exceptions[index].class_cp_index); | |
| 250 } | |
| 251 } | |
| 252 | |
| 253 // Write SourceFile attribute | |
| 254 // JVMSpec| SourceFile_attribute { | |
| 255 // JVMSpec| u2 attribute_name_index; | |
| 256 // JVMSpec| u4 attribute_length; | |
| 257 // JVMSpec| u2 sourcefile_index; | |
| 258 // JVMSpec| } | |
| 259 void JvmtiClassFileReconstituter::write_source_file_attribute() { | |
| 260 assert(ikh()->source_file_name() != NULL, "caller must check"); | |
| 261 | |
| 262 write_attribute_name_index("SourceFile"); | |
| 263 write_u4(2); // always length 2 | |
| 264 write_u2(symbol_to_cpool_index(ikh()->source_file_name())); | |
| 265 } | |
| 266 | |
| 267 // Write SourceDebugExtension attribute | |
| 268 // JSR45| SourceDebugExtension_attribute { | |
| 269 // JSR45| u2 attribute_name_index; | |
| 270 // JSR45| u4 attribute_length; | |
| 271 // JSR45| u2 sourcefile_index; | |
| 272 // JSR45| } | |
| 273 void JvmtiClassFileReconstituter::write_source_debug_extension_attribute() { | |
| 274 assert(ikh()->source_debug_extension() != NULL, "caller must check"); | |
| 275 | |
| 276 write_attribute_name_index("SourceDebugExtension"); | |
| 277 write_u4(2); // always length 2 | |
| 278 write_u2(symbol_to_cpool_index(ikh()->source_debug_extension())); | |
| 279 } | |
| 280 | |
| 281 // Write (generic) Signature attribute | |
| 282 // JVMSpec| Signature_attribute { | |
| 283 // JVMSpec| u2 attribute_name_index; | |
| 284 // JVMSpec| u4 attribute_length; | |
| 285 // JVMSpec| u2 signature_index; | |
| 286 // JVMSpec| } | |
| 287 void JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) { | |
| 288 write_attribute_name_index("Signature"); | |
| 289 write_u4(2); // always length 2 | |
| 290 write_u2(generic_signature_index); | |
| 291 } | |
| 292 | |
| 293 // Compute the number of entries in the InnerClasses attribute | |
| 294 u2 JvmtiClassFileReconstituter::inner_classes_attribute_length() { | |
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295 InnerClassesIterator iter(ikh()); |
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296 return iter.length(); |
| 0 | 297 } |
| 298 | |
| 299 // Write an annotation attribute. The VM stores them in raw form, so all we need | |
| 300 // to do is add the attrubute name and fill in the length. | |
| 301 // JSR202| *Annotations_attribute { | |
| 302 // JSR202| u2 attribute_name_index; | |
| 303 // JSR202| u4 attribute_length; | |
| 304 // JSR202| ... | |
| 305 // JSR202| } | |
| 306 void JvmtiClassFileReconstituter::write_annotations_attribute(const char* attr_name, | |
| 307 typeArrayHandle annos) { | |
| 308 u4 length = annos->length(); | |
| 309 write_attribute_name_index(attr_name); | |
| 310 write_u4(length); | |
| 311 memcpy(writeable_address(length), annos->byte_at_addr(0), length); | |
| 312 } | |
| 313 | |
| 314 | |
| 315 // Write InnerClasses attribute | |
| 316 // JVMSpec| InnerClasses_attribute { | |
| 317 // JVMSpec| u2 attribute_name_index; | |
| 318 // JVMSpec| u4 attribute_length; | |
| 319 // JVMSpec| u2 number_of_classes; | |
| 320 // JVMSpec| { u2 inner_class_info_index; | |
| 321 // JVMSpec| u2 outer_class_info_index; | |
| 322 // JVMSpec| u2 inner_name_index; | |
| 323 // JVMSpec| u2 inner_class_access_flags; | |
| 324 // JVMSpec| } classes[number_of_classes]; | |
| 325 // JVMSpec| } | |
| 326 void JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) { | |
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327 InnerClassesIterator iter(ikh()); |
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328 guarantee(iter.length() != 0 && iter.length() == length, |
| 0 | 329 "caller must check"); |
| 330 u2 entry_count = length / instanceKlass::inner_class_next_offset; | |
| 331 u4 size = 2 + entry_count * (2+2+2+2); | |
| 332 | |
| 333 write_attribute_name_index("InnerClasses"); | |
| 334 write_u4(size); | |
| 335 write_u2(entry_count); | |
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336 for (; !iter.done(); iter.next()) { |
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337 write_u2(iter.inner_class_info_index()); |
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338 write_u2(iter.outer_class_info_index()); |
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339 write_u2(iter.inner_name_index()); |
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340 write_u2(iter.inner_access_flags()); |
| 0 | 341 } |
| 342 } | |
| 343 | |
| 344 // Write Synthetic attribute | |
| 345 // JVMSpec| Synthetic_attribute { | |
| 346 // JVMSpec| u2 attribute_name_index; | |
| 347 // JVMSpec| u4 attribute_length; | |
| 348 // JVMSpec| } | |
| 349 void JvmtiClassFileReconstituter::write_synthetic_attribute() { | |
| 350 write_attribute_name_index("Synthetic"); | |
| 351 write_u4(0); //length always zero | |
| 352 } | |
| 353 | |
| 354 // Compute size of LineNumberTable | |
| 355 u2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) { | |
| 356 // The line number table is compressed so we don't know how big it is until decompressed. | |
| 357 // Decompression is really fast so we just do it twice. | |
| 358 u2 num_entries = 0; | |
| 359 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
| 360 while (stream.read_pair()) { | |
| 361 num_entries++; | |
| 362 } | |
| 363 return num_entries; | |
| 364 } | |
| 365 | |
| 366 // Write LineNumberTable attribute | |
| 367 // JVMSpec| LineNumberTable_attribute { | |
| 368 // JVMSpec| u2 attribute_name_index; | |
| 369 // JVMSpec| u4 attribute_length; | |
| 370 // JVMSpec| u2 line_number_table_length; | |
| 371 // JVMSpec| { u2 start_pc; | |
| 372 // JVMSpec| u2 line_number; | |
| 373 // JVMSpec| } line_number_table[line_number_table_length]; | |
| 374 // JVMSpec| } | |
| 375 void JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method, | |
| 376 u2 num_entries) { | |
| 377 | |
| 378 write_attribute_name_index("LineNumberTable"); | |
| 379 write_u4(2 + num_entries * (2 + 2)); | |
| 380 write_u2(num_entries); | |
| 381 | |
| 382 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
| 383 while (stream.read_pair()) { | |
| 384 write_u2(stream.bci()); | |
| 385 write_u2(stream.line()); | |
| 386 } | |
| 387 } | |
| 388 | |
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389 // Write LineNumberTable attribute |
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390 // JVMSpec| LocalVariableTable_attribute { |
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391 // JVMSpec| u2 attribute_name_index; |
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392 // JVMSpec| u4 attribute_length; |
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393 // JVMSpec| u2 local_variable_table_length; |
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394 // JVMSpec| { u2 start_pc; |
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395 // JVMSpec| u2 length; |
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396 // JVMSpec| u2 name_index; |
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397 // JVMSpec| u2 descriptor_index; |
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398 // JVMSpec| u2 index; |
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399 // JVMSpec| } local_variable_table[local_variable_table_length]; |
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400 // JVMSpec| } |
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401 void JvmtiClassFileReconstituter::write_local_variable_table_attribute(methodHandle method, u2 num_entries) { |
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402 write_attribute_name_index("LocalVariableTable"); |
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403 write_u4(2 + num_entries * (2 + 2 + 2 + 2 + 2)); |
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404 write_u2(num_entries); |
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405 |
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406 assert(method->localvariable_table_length() == num_entries, "just checking"); |
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407 |
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408 LocalVariableTableElement *elem = method->localvariable_table_start(); |
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409 for (int j=0; j<method->localvariable_table_length(); j++) { |
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410 write_u2(elem->start_bci); |
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411 write_u2(elem->length); |
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412 write_u2(elem->name_cp_index); |
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413 write_u2(elem->descriptor_cp_index); |
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414 write_u2(elem->slot); |
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415 elem++; |
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416 } |
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417 } |
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418 |
| 0 | 419 // Write stack map table attribute |
| 420 // JSR-202| StackMapTable_attribute { | |
| 421 // JSR-202| u2 attribute_name_index; | |
| 422 // JSR-202| u4 attribute_length; | |
| 423 // JSR-202| u2 number_of_entries; | |
| 424 // JSR-202| stack_map_frame_entries[number_of_entries]; | |
| 425 // JSR-202| } | |
| 426 void JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method, | |
| 427 int stackmap_len) { | |
| 428 | |
| 429 write_attribute_name_index("StackMapTable"); | |
| 430 write_u4(stackmap_len); | |
| 431 memcpy( | |
| 432 writeable_address(stackmap_len), | |
| 433 (void*)(method->stackmap_data()->byte_at_addr(0)), | |
| 434 stackmap_len); | |
| 435 } | |
| 436 | |
| 437 // Write one method_info structure | |
| 438 // JVMSpec| method_info { | |
| 439 // JVMSpec| u2 access_flags; | |
| 440 // JVMSpec| u2 name_index; | |
| 441 // JVMSpec| u2 descriptor_index; | |
| 442 // JVMSpec| u2 attributes_count; | |
| 443 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 444 // JVMSpec| } | |
| 445 void JvmtiClassFileReconstituter::write_method_info(methodHandle method) { | |
| 446 AccessFlags access_flags = method->access_flags(); | |
| 447 constMethodHandle const_method(thread(), method->constMethod()); | |
| 448 u2 generic_signature_index = const_method->generic_signature_index(); | |
| 449 typeArrayHandle anno(thread(), method->annotations()); | |
| 450 typeArrayHandle param_anno(thread(), method->parameter_annotations()); | |
| 451 typeArrayHandle default_anno(thread(), method->annotation_default()); | |
| 452 | |
| 453 write_u2(access_flags.get_flags() & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
| 454 write_u2(const_method->name_index()); | |
| 455 write_u2(const_method->signature_index()); | |
| 456 | |
| 457 // write attributes in the same order javac does, so we can test with byte for | |
| 458 // byte comparison | |
| 459 int attr_count = 0; | |
| 460 if (const_method->code_size() != 0) { | |
| 461 ++attr_count; // has Code attribute | |
| 462 } | |
| 463 if (const_method->has_checked_exceptions()) { | |
| 464 ++attr_count; // has Exceptions attribute | |
| 465 } | |
| 466 if (default_anno.not_null()) { | |
| 467 ++attr_count; // has AnnotationDefault attribute | |
| 468 } | |
| 469 // Deprecated attribute would go here | |
| 470 if (access_flags.is_synthetic()) { // FIXME | |
| 471 // ++attr_count; | |
| 472 } | |
| 473 if (generic_signature_index != 0) { | |
| 474 ++attr_count; | |
| 475 } | |
| 476 if (anno.not_null()) { | |
| 477 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
| 478 } | |
| 479 if (param_anno.not_null()) { | |
| 480 ++attr_count; // has RuntimeVisibleParameterAnnotations attribute | |
| 481 } | |
| 482 | |
| 483 write_u2(attr_count); | |
| 484 if (const_method->code_size() > 0) { | |
| 485 write_code_attribute(method); | |
| 486 } | |
| 487 if (const_method->has_checked_exceptions()) { | |
| 488 write_exceptions_attribute(const_method); | |
| 489 } | |
| 490 if (default_anno.not_null()) { | |
| 491 write_annotations_attribute("AnnotationDefault", default_anno); | |
| 492 } | |
| 493 // Deprecated attribute would go here | |
| 494 if (access_flags.is_synthetic()) { | |
| 495 // write_synthetic_attribute(); | |
| 496 } | |
| 497 if (generic_signature_index != 0) { | |
| 498 write_signature_attribute(generic_signature_index); | |
| 499 } | |
| 500 if (anno.not_null()) { | |
| 501 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
| 502 } | |
| 503 if (param_anno.not_null()) { | |
| 504 write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno); | |
| 505 } | |
| 506 } | |
| 507 | |
| 508 // Write the class attributes portion of ClassFile structure | |
| 509 // JVMSpec| u2 attributes_count; | |
| 510 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 511 void JvmtiClassFileReconstituter::write_class_attributes() { | |
| 512 u2 inner_classes_length = inner_classes_attribute_length(); | |
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513 Symbol* generic_signature = ikh()->generic_signature(); |
| 0 | 514 typeArrayHandle anno(thread(), ikh()->class_annotations()); |
| 515 | |
| 516 int attr_count = 0; | |
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517 if (generic_signature != NULL) { |
| 0 | 518 ++attr_count; |
| 519 } | |
| 520 if (ikh()->source_file_name() != NULL) { | |
| 521 ++attr_count; | |
| 522 } | |
| 523 if (ikh()->source_debug_extension() != NULL) { | |
| 524 ++attr_count; | |
| 525 } | |
| 526 if (inner_classes_length > 0) { | |
| 527 ++attr_count; | |
| 528 } | |
| 529 if (anno.not_null()) { | |
| 530 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
| 531 } | |
| 532 | |
| 533 write_u2(attr_count); | |
| 534 | |
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535 if (generic_signature != NULL) { |
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536 write_signature_attribute(symbol_to_cpool_index(generic_signature)); |
| 0 | 537 } |
| 538 if (ikh()->source_file_name() != NULL) { | |
| 539 write_source_file_attribute(); | |
| 540 } | |
| 541 if (ikh()->source_debug_extension() != NULL) { | |
| 542 write_source_debug_extension_attribute(); | |
| 543 } | |
| 544 if (inner_classes_length > 0) { | |
| 545 write_inner_classes_attribute(inner_classes_length); | |
| 546 } | |
| 547 if (anno.not_null()) { | |
| 548 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
| 549 } | |
| 550 } | |
| 551 | |
| 552 // Write the method information portion of ClassFile structure | |
| 553 // JVMSpec| u2 methods_count; | |
| 554 // JVMSpec| method_info methods[methods_count]; | |
| 555 void JvmtiClassFileReconstituter::write_method_infos() { | |
| 556 HandleMark hm(thread()); | |
| 557 objArrayHandle methods(thread(), ikh()->methods()); | |
| 558 int num_methods = methods->length(); | |
| 559 | |
| 560 write_u2(num_methods); | |
| 561 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 562 int index; | |
| 563 int original_index; | |
| 564 int* method_order = NEW_RESOURCE_ARRAY(int, num_methods); | |
| 565 | |
| 566 // invert the method order mapping | |
| 567 for (index = 0; index < num_methods; index++) { | |
| 568 original_index = ikh()->method_ordering()->int_at(index); | |
| 569 assert(original_index >= 0 && original_index < num_methods, | |
| 570 "invalid original method index"); | |
| 571 method_order[original_index] = index; | |
| 572 } | |
| 573 | |
| 574 // write in original order | |
| 575 for (original_index = 0; original_index < num_methods; original_index++) { | |
| 576 index = method_order[original_index]; | |
| 577 methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); | |
| 578 write_method_info(method); | |
| 579 } | |
| 580 } else { | |
| 581 // method order not preserved just dump the method infos | |
| 582 for (int index = 0; index < num_methods; index++) { | |
| 583 methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); | |
| 584 write_method_info(method); | |
| 585 } | |
| 586 } | |
| 587 } | |
| 588 | |
| 589 void JvmtiClassFileReconstituter::write_class_file_format() { | |
| 590 ReallocMark(); | |
| 591 | |
| 592 // JVMSpec| ClassFile { | |
| 593 // JVMSpec| u4 magic; | |
| 594 write_u4(0xCAFEBABE); | |
| 595 | |
| 596 // JVMSpec| u2 minor_version; | |
| 597 // JVMSpec| u2 major_version; | |
| 598 write_u2(ikh()->minor_version()); | |
| 599 u2 major = ikh()->major_version(); | |
| 600 write_u2(major); | |
| 601 | |
| 602 // JVMSpec| u2 constant_pool_count; | |
| 603 // JVMSpec| cp_info constant_pool[constant_pool_count-1]; | |
| 604 write_u2(cpool()->length()); | |
| 605 copy_cpool_bytes(writeable_address(cpool_size())); | |
| 606 | |
| 607 // JVMSpec| u2 access_flags; | |
| 608 write_u2(ikh()->access_flags().get_flags() & JVM_RECOGNIZED_CLASS_MODIFIERS); | |
| 609 | |
| 610 // JVMSpec| u2 this_class; | |
| 611 // JVMSpec| u2 super_class; | |
| 612 write_u2(class_symbol_to_cpool_index(ikh()->name())); | |
| 613 klassOop super_class = ikh()->super(); | |
| 614 write_u2(super_class == NULL? 0 : // zero for java.lang.Object | |
| 615 class_symbol_to_cpool_index(super_class->klass_part()->name())); | |
| 616 | |
| 617 // JVMSpec| u2 interfaces_count; | |
| 618 // JVMSpec| u2 interfaces[interfaces_count]; | |
| 619 objArrayHandle interfaces(thread(), ikh()->local_interfaces()); | |
| 620 int num_interfaces = interfaces->length(); | |
| 621 write_u2(num_interfaces); | |
| 622 for (int index = 0; index < num_interfaces; index++) { | |
| 623 HandleMark hm(thread()); | |
| 624 instanceKlassHandle iikh(thread(), klassOop(interfaces->obj_at(index))); | |
| 625 write_u2(class_symbol_to_cpool_index(iikh->name())); | |
| 626 } | |
| 627 | |
| 628 // JVMSpec| u2 fields_count; | |
| 629 // JVMSpec| field_info fields[fields_count]; | |
| 630 write_field_infos(); | |
| 631 | |
| 632 // JVMSpec| u2 methods_count; | |
| 633 // JVMSpec| method_info methods[methods_count]; | |
| 634 write_method_infos(); | |
| 635 | |
| 636 // JVMSpec| u2 attributes_count; | |
| 637 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 638 // JVMSpec| } /* end ClassFile 8? | |
| 639 write_class_attributes(); | |
| 640 } | |
| 641 | |
| 642 address JvmtiClassFileReconstituter::writeable_address(size_t size) { | |
| 643 size_t used_size = _buffer_ptr - _buffer; | |
| 644 if (size + used_size >= _buffer_size) { | |
| 645 // compute the new buffer size: must be at least twice as big as before | |
| 646 // plus whatever new is being used; then convert to nice clean block boundary | |
| 647 size_t new_buffer_size = (size + _buffer_size*2 + 1) / initial_buffer_size | |
| 648 * initial_buffer_size; | |
| 649 | |
| 650 // VM goes belly-up if the memory isn't available, so cannot do OOM processing | |
| 651 _buffer = REALLOC_RESOURCE_ARRAY(u1, _buffer, _buffer_size, new_buffer_size); | |
| 652 _buffer_size = new_buffer_size; | |
| 653 _buffer_ptr = _buffer + used_size; | |
| 654 } | |
| 655 u1* ret_ptr = _buffer_ptr; | |
| 656 _buffer_ptr += size; | |
| 657 return ret_ptr; | |
| 658 } | |
| 659 | |
| 660 void JvmtiClassFileReconstituter::write_attribute_name_index(const char* name) { | |
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661 TempNewSymbol sym = SymbolTable::probe(name, (int)strlen(name)); |
| 0 | 662 assert(sym != NULL, "attribute name symbol not found"); |
| 663 u2 attr_name_index = symbol_to_cpool_index(sym); | |
| 664 assert(attr_name_index != 0, "attribute name symbol not in constant pool"); | |
| 665 write_u2(attr_name_index); | |
| 666 } | |
| 667 | |
| 668 void JvmtiClassFileReconstituter::write_u1(u1 x) { | |
| 669 *writeable_address(1) = x; | |
| 670 } | |
| 671 | |
| 672 void JvmtiClassFileReconstituter::write_u2(u2 x) { | |
| 673 Bytes::put_Java_u2(writeable_address(2), x); | |
| 674 } | |
| 675 | |
| 676 void JvmtiClassFileReconstituter::write_u4(u4 x) { | |
| 677 Bytes::put_Java_u4(writeable_address(4), x); | |
| 678 } | |
| 679 | |
| 680 void JvmtiClassFileReconstituter::write_u8(u8 x) { | |
| 681 Bytes::put_Java_u8(writeable_address(8), x); | |
| 682 } | |
| 683 | |
| 684 void JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh, | |
| 685 unsigned char* bytecodes) { | |
| 686 // use a BytecodeStream to iterate over the bytecodes. JVM/fast bytecodes | |
| 687 // and the breakpoint bytecode are converted to their original bytecodes. | |
| 688 | |
| 689 BytecodeStream bs(mh); | |
| 690 | |
| 691 unsigned char* p = bytecodes; | |
| 692 Bytecodes::Code code; | |
| 693 bool is_rewritten = instanceKlass::cast(mh->method_holder())->is_rewritten(); | |
| 694 | |
| 695 while ((code = bs.next()) >= 0) { | |
| 696 assert(Bytecodes::is_java_code(code), "sanity check"); | |
| 697 assert(code != Bytecodes::_breakpoint, "sanity check"); | |
| 698 | |
| 699 // length of bytecode (mnemonic + operands) | |
| 700 address bcp = bs.bcp(); | |
| 1565 | 701 int len = bs.instruction_size(); |
| 0 | 702 assert(len > 0, "length must be > 0"); |
| 703 | |
| 704 // copy the bytecodes | |
| 705 *p = (unsigned char) (bs.is_wide()? Bytecodes::_wide : code); | |
| 706 if (len > 1) { | |
| 707 memcpy(p+1, bcp+1, len-1); | |
| 708 } | |
| 709 | |
| 710 // During linking the get/put and invoke instructions are rewritten | |
| 711 // with an index into the constant pool cache. The original constant | |
| 712 // pool index must be returned to caller. Rewrite the index. | |
| 713 if (is_rewritten && len >= 3) { | |
| 714 switch (code) { | |
| 715 case Bytecodes::_getstatic : // fall through | |
| 716 case Bytecodes::_putstatic : // fall through | |
| 717 case Bytecodes::_getfield : // fall through | |
| 718 case Bytecodes::_putfield : // fall through | |
| 719 case Bytecodes::_invokevirtual : // fall through | |
| 720 case Bytecodes::_invokespecial : // fall through | |
| 721 case Bytecodes::_invokestatic : // fall through | |
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722 case Bytecodes::_invokedynamic : // fall through |
| 0 | 723 case Bytecodes::_invokeinterface : |
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725 (code == Bytecodes::_invokeinterface && len == 5) || |
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726 (code == Bytecodes::_invokedynamic && len == 5), |
| 0 | 727 "sanity check"); |
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728 |
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726
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729 int cpci = Bytes::get_native_u2(bcp+1); |
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730 bool is_invokedynamic = (EnableInvokeDynamic && code == Bytecodes::_invokedynamic); |
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731 if (is_invokedynamic) |
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732 cpci = Bytes::get_native_u4(bcp+1); |
| 0 | 733 // cache cannot be pre-fetched since some classes won't have it yet |
| 734 ConstantPoolCacheEntry* entry = | |
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735 mh->constants()->cache()->main_entry_at(cpci); |
| 0 | 736 int i = entry->constant_pool_index(); |
| 737 assert(i < mh->constants()->length(), "sanity check"); | |
| 738 Bytes::put_Java_u2((address)(p+1), (u2)i); // java byte ordering | |
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739 if (is_invokedynamic) *(p+3) = *(p+4) = 0; |
| 0 | 740 break; |
| 741 } | |
| 742 } | |
| 743 | |
| 744 p += len; | |
| 745 } | |
| 746 } |