Thu, 09 Dec 2010 15:04:26 -0500
7004582: Add GetThisObject() function to JVMTI 1.2
Summary: Add 'GetThisObject' function
Reviewed-by: never, coleenp
duke@435 | 1 | /* |
jrose@1934 | 2 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
stefank@2314 | 26 | #include "classfile/symbolTable.hpp" |
stefank@2314 | 27 | #include "interpreter/bytecodeStream.hpp" |
stefank@2314 | 28 | #include "prims/jvmtiClassFileReconstituter.hpp" |
stefank@2314 | 29 | #include "runtime/signature.hpp" |
stefank@2314 | 30 | #ifdef TARGET_ARCH_x86 |
stefank@2314 | 31 | # include "bytes_x86.hpp" |
stefank@2314 | 32 | #endif |
stefank@2314 | 33 | #ifdef TARGET_ARCH_sparc |
stefank@2314 | 34 | # include "bytes_sparc.hpp" |
stefank@2314 | 35 | #endif |
stefank@2314 | 36 | #ifdef TARGET_ARCH_zero |
stefank@2314 | 37 | # include "bytes_zero.hpp" |
stefank@2314 | 38 | #endif |
duke@435 | 39 | // FIXME: add Deprecated, LVT, LVTT attributes |
duke@435 | 40 | // FIXME: fix Synthetic attribute |
duke@435 | 41 | // FIXME: per Serguei, add error return handling for constantPoolOopDesc::copy_cpool_bytes() |
duke@435 | 42 | |
duke@435 | 43 | |
duke@435 | 44 | // Write the field information portion of ClassFile structure |
duke@435 | 45 | // JVMSpec| u2 fields_count; |
duke@435 | 46 | // JVMSpec| field_info fields[fields_count]; |
duke@435 | 47 | void JvmtiClassFileReconstituter::write_field_infos() { |
duke@435 | 48 | HandleMark hm(thread()); |
duke@435 | 49 | typeArrayHandle fields(thread(), ikh()->fields()); |
duke@435 | 50 | int fields_length = fields->length(); |
duke@435 | 51 | int num_fields = fields_length / instanceKlass::next_offset; |
duke@435 | 52 | objArrayHandle fields_anno(thread(), ikh()->fields_annotations()); |
duke@435 | 53 | |
duke@435 | 54 | write_u2(num_fields); |
duke@435 | 55 | for (int index = 0; index < fields_length; index += instanceKlass::next_offset) { |
duke@435 | 56 | AccessFlags access_flags; |
duke@435 | 57 | int flags = fields->ushort_at(index + instanceKlass::access_flags_offset); |
duke@435 | 58 | access_flags.set_flags(flags); |
duke@435 | 59 | int name_index = fields->ushort_at(index + instanceKlass::name_index_offset); |
duke@435 | 60 | int signature_index = fields->ushort_at(index + instanceKlass::signature_index_offset); |
duke@435 | 61 | int initial_value_index = fields->ushort_at(index + instanceKlass::initval_index_offset); |
duke@435 | 62 | guarantee(name_index != 0 && signature_index != 0, "bad constant pool index for field"); |
duke@435 | 63 | int offset = ikh()->offset_from_fields( index ); |
duke@435 | 64 | int generic_signature_index = |
duke@435 | 65 | fields->ushort_at(index + instanceKlass::generic_signature_offset); |
duke@435 | 66 | typeArrayHandle anno(thread(), fields_anno.not_null() ? |
duke@435 | 67 | (typeArrayOop)(fields_anno->obj_at(index / instanceKlass::next_offset)) : |
duke@435 | 68 | (typeArrayOop)NULL); |
duke@435 | 69 | |
duke@435 | 70 | // JVMSpec| field_info { |
duke@435 | 71 | // JVMSpec| u2 access_flags; |
duke@435 | 72 | // JVMSpec| u2 name_index; |
duke@435 | 73 | // JVMSpec| u2 descriptor_index; |
duke@435 | 74 | // JVMSpec| u2 attributes_count; |
duke@435 | 75 | // JVMSpec| attribute_info attributes[attributes_count]; |
duke@435 | 76 | // JVMSpec| } |
duke@435 | 77 | |
duke@435 | 78 | write_u2(flags & JVM_RECOGNIZED_FIELD_MODIFIERS); |
duke@435 | 79 | write_u2(name_index); |
duke@435 | 80 | write_u2(signature_index); |
duke@435 | 81 | int attr_count = 0; |
duke@435 | 82 | if (initial_value_index != 0) { |
duke@435 | 83 | ++attr_count; |
duke@435 | 84 | } |
duke@435 | 85 | if (access_flags.is_synthetic()) { |
duke@435 | 86 | // ++attr_count; |
duke@435 | 87 | } |
duke@435 | 88 | if (generic_signature_index != 0) { |
duke@435 | 89 | ++attr_count; |
duke@435 | 90 | } |
duke@435 | 91 | if (anno.not_null()) { |
duke@435 | 92 | ++attr_count; // has RuntimeVisibleAnnotations attribute |
duke@435 | 93 | } |
duke@435 | 94 | |
duke@435 | 95 | write_u2(attr_count); |
duke@435 | 96 | |
duke@435 | 97 | if (initial_value_index != 0) { |
duke@435 | 98 | write_attribute_name_index("ConstantValue"); |
duke@435 | 99 | write_u4(2); //length always 2 |
duke@435 | 100 | write_u2(initial_value_index); |
duke@435 | 101 | } |
duke@435 | 102 | if (access_flags.is_synthetic()) { |
duke@435 | 103 | // write_synthetic_attribute(); |
duke@435 | 104 | } |
duke@435 | 105 | if (generic_signature_index != 0) { |
duke@435 | 106 | write_signature_attribute(generic_signature_index); |
duke@435 | 107 | } |
duke@435 | 108 | if (anno.not_null()) { |
duke@435 | 109 | write_annotations_attribute("RuntimeVisibleAnnotations", anno); |
duke@435 | 110 | } |
duke@435 | 111 | } |
duke@435 | 112 | } |
duke@435 | 113 | |
duke@435 | 114 | // Write Code attribute |
duke@435 | 115 | // JVMSpec| Code_attribute { |
duke@435 | 116 | // JVMSpec| u2 attribute_name_index; |
duke@435 | 117 | // JVMSpec| u4 attribute_length; |
duke@435 | 118 | // JVMSpec| u2 max_stack; |
duke@435 | 119 | // JVMSpec| u2 max_locals; |
duke@435 | 120 | // JVMSpec| u4 code_length; |
duke@435 | 121 | // JVMSpec| u1 code[code_length]; |
duke@435 | 122 | // JVMSpec| u2 exception_table_length; |
duke@435 | 123 | // JVMSpec| { u2 start_pc; |
duke@435 | 124 | // JVMSpec| u2 end_pc; |
duke@435 | 125 | // JVMSpec| u2 handler_pc; |
duke@435 | 126 | // JVMSpec| u2 catch_type; |
duke@435 | 127 | // JVMSpec| } exception_table[exception_table_length]; |
duke@435 | 128 | // JVMSpec| u2 attributes_count; |
duke@435 | 129 | // JVMSpec| attribute_info attributes[attributes_count]; |
duke@435 | 130 | // JVMSpec| } |
duke@435 | 131 | void JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) { |
duke@435 | 132 | constMethodHandle const_method(thread(), method->constMethod()); |
duke@435 | 133 | u2 line_num_cnt = 0; |
duke@435 | 134 | int stackmap_len = 0; |
duke@435 | 135 | |
duke@435 | 136 | // compute number and length of attributes -- FIXME: for now no LVT |
duke@435 | 137 | int attr_count = 0; |
duke@435 | 138 | int attr_size = 0; |
duke@435 | 139 | if (const_method->has_linenumber_table()) { |
duke@435 | 140 | line_num_cnt = line_number_table_entries(method); |
duke@435 | 141 | if (line_num_cnt != 0) { |
duke@435 | 142 | ++attr_count; |
duke@435 | 143 | // Compute the complete size of the line number table attribute: |
duke@435 | 144 | // LineNumberTable_attribute { |
duke@435 | 145 | // u2 attribute_name_index; |
duke@435 | 146 | // u4 attribute_length; |
duke@435 | 147 | // u2 line_number_table_length; |
duke@435 | 148 | // { u2 start_pc; |
duke@435 | 149 | // u2 line_number; |
duke@435 | 150 | // } line_number_table[line_number_table_length]; |
duke@435 | 151 | // } |
duke@435 | 152 | attr_size += 2 + 4 + 2 + line_num_cnt * (2 + 2); |
duke@435 | 153 | } |
duke@435 | 154 | } |
duke@435 | 155 | if (method->has_stackmap_table()) { |
duke@435 | 156 | stackmap_len = method->stackmap_data()->length(); |
duke@435 | 157 | if (stackmap_len != 0) { |
duke@435 | 158 | ++attr_count; |
duke@435 | 159 | // Compute the size of the stack map table attribute (VM stores raw): |
duke@435 | 160 | // StackMapTable_attribute { |
duke@435 | 161 | // u2 attribute_name_index; |
duke@435 | 162 | // u4 attribute_length; |
duke@435 | 163 | // u2 number_of_entries; |
duke@435 | 164 | // stack_map_frame_entries[number_of_entries]; |
duke@435 | 165 | // } |
duke@435 | 166 | attr_size += 2 + 4 + stackmap_len; |
duke@435 | 167 | } |
duke@435 | 168 | } |
duke@435 | 169 | |
duke@435 | 170 | typeArrayHandle exception_table(thread(), const_method->exception_table()); |
duke@435 | 171 | int exception_table_length = exception_table->length(); |
duke@435 | 172 | int exception_table_entries = exception_table_length / 4; |
duke@435 | 173 | int code_size = const_method->code_size(); |
duke@435 | 174 | int size = |
duke@435 | 175 | 2+2+4 + // max_stack, max_locals, code_length |
duke@435 | 176 | code_size + // code |
duke@435 | 177 | 2 + // exception_table_length |
duke@435 | 178 | (2+2+2+2) * exception_table_entries + // exception_table |
duke@435 | 179 | 2 + // attributes_count |
duke@435 | 180 | attr_size; // attributes |
duke@435 | 181 | |
duke@435 | 182 | write_attribute_name_index("Code"); |
duke@435 | 183 | write_u4(size); |
duke@435 | 184 | write_u2(method->max_stack()); |
duke@435 | 185 | write_u2(method->max_locals()); |
duke@435 | 186 | write_u4(code_size); |
duke@435 | 187 | copy_bytecodes(method, (unsigned char*)writeable_address(code_size)); |
duke@435 | 188 | write_u2(exception_table_entries); |
duke@435 | 189 | for (int index = 0; index < exception_table_length; ) { |
duke@435 | 190 | write_u2(exception_table->int_at(index++)); |
duke@435 | 191 | write_u2(exception_table->int_at(index++)); |
duke@435 | 192 | write_u2(exception_table->int_at(index++)); |
duke@435 | 193 | write_u2(exception_table->int_at(index++)); |
duke@435 | 194 | } |
duke@435 | 195 | write_u2(attr_count); |
duke@435 | 196 | if (line_num_cnt != 0) { |
duke@435 | 197 | write_line_number_table_attribute(method, line_num_cnt); |
duke@435 | 198 | } |
duke@435 | 199 | if (stackmap_len != 0) { |
duke@435 | 200 | write_stackmap_table_attribute(method, stackmap_len); |
duke@435 | 201 | } |
duke@435 | 202 | |
duke@435 | 203 | // FIXME: write LVT attribute |
duke@435 | 204 | } |
duke@435 | 205 | |
duke@435 | 206 | // Write Exceptions attribute |
duke@435 | 207 | // JVMSpec| Exceptions_attribute { |
duke@435 | 208 | // JVMSpec| u2 attribute_name_index; |
duke@435 | 209 | // JVMSpec| u4 attribute_length; |
duke@435 | 210 | // JVMSpec| u2 number_of_exceptions; |
duke@435 | 211 | // JVMSpec| u2 exception_index_table[number_of_exceptions]; |
duke@435 | 212 | // JVMSpec| } |
duke@435 | 213 | void JvmtiClassFileReconstituter::write_exceptions_attribute(constMethodHandle const_method) { |
duke@435 | 214 | CheckedExceptionElement* checked_exceptions = const_method->checked_exceptions_start(); |
duke@435 | 215 | int checked_exceptions_length = const_method->checked_exceptions_length(); |
duke@435 | 216 | int size = |
duke@435 | 217 | 2 + // number_of_exceptions |
duke@435 | 218 | 2 * checked_exceptions_length; // exception_index_table |
duke@435 | 219 | |
duke@435 | 220 | write_attribute_name_index("Exceptions"); |
duke@435 | 221 | write_u4(size); |
duke@435 | 222 | write_u2(checked_exceptions_length); |
duke@435 | 223 | for (int index = 0; index < checked_exceptions_length; index++) { |
duke@435 | 224 | write_u2(checked_exceptions[index].class_cp_index); |
duke@435 | 225 | } |
duke@435 | 226 | } |
duke@435 | 227 | |
duke@435 | 228 | // Write SourceFile attribute |
duke@435 | 229 | // JVMSpec| SourceFile_attribute { |
duke@435 | 230 | // JVMSpec| u2 attribute_name_index; |
duke@435 | 231 | // JVMSpec| u4 attribute_length; |
duke@435 | 232 | // JVMSpec| u2 sourcefile_index; |
duke@435 | 233 | // JVMSpec| } |
duke@435 | 234 | void JvmtiClassFileReconstituter::write_source_file_attribute() { |
duke@435 | 235 | assert(ikh()->source_file_name() != NULL, "caller must check"); |
duke@435 | 236 | |
duke@435 | 237 | write_attribute_name_index("SourceFile"); |
duke@435 | 238 | write_u4(2); // always length 2 |
duke@435 | 239 | write_u2(symbol_to_cpool_index(ikh()->source_file_name())); |
duke@435 | 240 | } |
duke@435 | 241 | |
duke@435 | 242 | // Write SourceDebugExtension attribute |
duke@435 | 243 | // JSR45| SourceDebugExtension_attribute { |
duke@435 | 244 | // JSR45| u2 attribute_name_index; |
duke@435 | 245 | // JSR45| u4 attribute_length; |
duke@435 | 246 | // JSR45| u2 sourcefile_index; |
duke@435 | 247 | // JSR45| } |
duke@435 | 248 | void JvmtiClassFileReconstituter::write_source_debug_extension_attribute() { |
duke@435 | 249 | assert(ikh()->source_debug_extension() != NULL, "caller must check"); |
duke@435 | 250 | |
duke@435 | 251 | write_attribute_name_index("SourceDebugExtension"); |
duke@435 | 252 | write_u4(2); // always length 2 |
duke@435 | 253 | write_u2(symbol_to_cpool_index(ikh()->source_debug_extension())); |
duke@435 | 254 | } |
duke@435 | 255 | |
duke@435 | 256 | // Write (generic) Signature attribute |
duke@435 | 257 | // JVMSpec| Signature_attribute { |
duke@435 | 258 | // JVMSpec| u2 attribute_name_index; |
duke@435 | 259 | // JVMSpec| u4 attribute_length; |
duke@435 | 260 | // JVMSpec| u2 signature_index; |
duke@435 | 261 | // JVMSpec| } |
duke@435 | 262 | void JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) { |
duke@435 | 263 | write_attribute_name_index("Signature"); |
duke@435 | 264 | write_u4(2); // always length 2 |
duke@435 | 265 | write_u2(generic_signature_index); |
duke@435 | 266 | } |
duke@435 | 267 | |
duke@435 | 268 | // Compute the number of entries in the InnerClasses attribute |
duke@435 | 269 | u2 JvmtiClassFileReconstituter::inner_classes_attribute_length() { |
duke@435 | 270 | typeArrayOop inner_class_list = ikh()->inner_classes(); |
duke@435 | 271 | return (inner_class_list == NULL) ? 0 : inner_class_list->length(); |
duke@435 | 272 | } |
duke@435 | 273 | |
duke@435 | 274 | // Write an annotation attribute. The VM stores them in raw form, so all we need |
duke@435 | 275 | // to do is add the attrubute name and fill in the length. |
duke@435 | 276 | // JSR202| *Annotations_attribute { |
duke@435 | 277 | // JSR202| u2 attribute_name_index; |
duke@435 | 278 | // JSR202| u4 attribute_length; |
duke@435 | 279 | // JSR202| ... |
duke@435 | 280 | // JSR202| } |
duke@435 | 281 | void JvmtiClassFileReconstituter::write_annotations_attribute(const char* attr_name, |
duke@435 | 282 | typeArrayHandle annos) { |
duke@435 | 283 | u4 length = annos->length(); |
duke@435 | 284 | write_attribute_name_index(attr_name); |
duke@435 | 285 | write_u4(length); |
duke@435 | 286 | memcpy(writeable_address(length), annos->byte_at_addr(0), length); |
duke@435 | 287 | } |
duke@435 | 288 | |
duke@435 | 289 | |
duke@435 | 290 | // Write InnerClasses attribute |
duke@435 | 291 | // JVMSpec| InnerClasses_attribute { |
duke@435 | 292 | // JVMSpec| u2 attribute_name_index; |
duke@435 | 293 | // JVMSpec| u4 attribute_length; |
duke@435 | 294 | // JVMSpec| u2 number_of_classes; |
duke@435 | 295 | // JVMSpec| { u2 inner_class_info_index; |
duke@435 | 296 | // JVMSpec| u2 outer_class_info_index; |
duke@435 | 297 | // JVMSpec| u2 inner_name_index; |
duke@435 | 298 | // JVMSpec| u2 inner_class_access_flags; |
duke@435 | 299 | // JVMSpec| } classes[number_of_classes]; |
duke@435 | 300 | // JVMSpec| } |
duke@435 | 301 | void JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) { |
duke@435 | 302 | typeArrayOop inner_class_list = ikh()->inner_classes(); |
duke@435 | 303 | guarantee(inner_class_list != NULL && inner_class_list->length() == length, |
duke@435 | 304 | "caller must check"); |
duke@435 | 305 | typeArrayHandle inner_class_list_h(thread(), inner_class_list); |
duke@435 | 306 | assert (length % instanceKlass::inner_class_next_offset == 0, "just checking"); |
duke@435 | 307 | u2 entry_count = length / instanceKlass::inner_class_next_offset; |
duke@435 | 308 | u4 size = 2 + entry_count * (2+2+2+2); |
duke@435 | 309 | |
duke@435 | 310 | write_attribute_name_index("InnerClasses"); |
duke@435 | 311 | write_u4(size); |
duke@435 | 312 | write_u2(entry_count); |
duke@435 | 313 | for (int i = 0; i < length; i += instanceKlass::inner_class_next_offset) { |
duke@435 | 314 | write_u2(inner_class_list_h->ushort_at( |
duke@435 | 315 | i + instanceKlass::inner_class_inner_class_info_offset)); |
duke@435 | 316 | write_u2(inner_class_list_h->ushort_at( |
duke@435 | 317 | i + instanceKlass::inner_class_outer_class_info_offset)); |
duke@435 | 318 | write_u2(inner_class_list_h->ushort_at( |
duke@435 | 319 | i + instanceKlass::inner_class_inner_name_offset)); |
duke@435 | 320 | write_u2(inner_class_list_h->ushort_at( |
duke@435 | 321 | i + instanceKlass::inner_class_access_flags_offset)); |
duke@435 | 322 | } |
duke@435 | 323 | } |
duke@435 | 324 | |
duke@435 | 325 | // Write Synthetic attribute |
duke@435 | 326 | // JVMSpec| Synthetic_attribute { |
duke@435 | 327 | // JVMSpec| u2 attribute_name_index; |
duke@435 | 328 | // JVMSpec| u4 attribute_length; |
duke@435 | 329 | // JVMSpec| } |
duke@435 | 330 | void JvmtiClassFileReconstituter::write_synthetic_attribute() { |
duke@435 | 331 | write_attribute_name_index("Synthetic"); |
duke@435 | 332 | write_u4(0); //length always zero |
duke@435 | 333 | } |
duke@435 | 334 | |
duke@435 | 335 | // Compute size of LineNumberTable |
duke@435 | 336 | u2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) { |
duke@435 | 337 | // The line number table is compressed so we don't know how big it is until decompressed. |
duke@435 | 338 | // Decompression is really fast so we just do it twice. |
duke@435 | 339 | u2 num_entries = 0; |
duke@435 | 340 | CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); |
duke@435 | 341 | while (stream.read_pair()) { |
duke@435 | 342 | num_entries++; |
duke@435 | 343 | } |
duke@435 | 344 | return num_entries; |
duke@435 | 345 | } |
duke@435 | 346 | |
duke@435 | 347 | // Write LineNumberTable attribute |
duke@435 | 348 | // JVMSpec| LineNumberTable_attribute { |
duke@435 | 349 | // JVMSpec| u2 attribute_name_index; |
duke@435 | 350 | // JVMSpec| u4 attribute_length; |
duke@435 | 351 | // JVMSpec| u2 line_number_table_length; |
duke@435 | 352 | // JVMSpec| { u2 start_pc; |
duke@435 | 353 | // JVMSpec| u2 line_number; |
duke@435 | 354 | // JVMSpec| } line_number_table[line_number_table_length]; |
duke@435 | 355 | // JVMSpec| } |
duke@435 | 356 | void JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method, |
duke@435 | 357 | u2 num_entries) { |
duke@435 | 358 | |
duke@435 | 359 | write_attribute_name_index("LineNumberTable"); |
duke@435 | 360 | write_u4(2 + num_entries * (2 + 2)); |
duke@435 | 361 | write_u2(num_entries); |
duke@435 | 362 | |
duke@435 | 363 | CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); |
duke@435 | 364 | while (stream.read_pair()) { |
duke@435 | 365 | write_u2(stream.bci()); |
duke@435 | 366 | write_u2(stream.line()); |
duke@435 | 367 | } |
duke@435 | 368 | } |
duke@435 | 369 | |
duke@435 | 370 | // Write stack map table attribute |
duke@435 | 371 | // JSR-202| StackMapTable_attribute { |
duke@435 | 372 | // JSR-202| u2 attribute_name_index; |
duke@435 | 373 | // JSR-202| u4 attribute_length; |
duke@435 | 374 | // JSR-202| u2 number_of_entries; |
duke@435 | 375 | // JSR-202| stack_map_frame_entries[number_of_entries]; |
duke@435 | 376 | // JSR-202| } |
duke@435 | 377 | void JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method, |
duke@435 | 378 | int stackmap_len) { |
duke@435 | 379 | |
duke@435 | 380 | write_attribute_name_index("StackMapTable"); |
duke@435 | 381 | write_u4(stackmap_len); |
duke@435 | 382 | memcpy( |
duke@435 | 383 | writeable_address(stackmap_len), |
duke@435 | 384 | (void*)(method->stackmap_data()->byte_at_addr(0)), |
duke@435 | 385 | stackmap_len); |
duke@435 | 386 | } |
duke@435 | 387 | |
duke@435 | 388 | // Write one method_info structure |
duke@435 | 389 | // JVMSpec| method_info { |
duke@435 | 390 | // JVMSpec| u2 access_flags; |
duke@435 | 391 | // JVMSpec| u2 name_index; |
duke@435 | 392 | // JVMSpec| u2 descriptor_index; |
duke@435 | 393 | // JVMSpec| u2 attributes_count; |
duke@435 | 394 | // JVMSpec| attribute_info attributes[attributes_count]; |
duke@435 | 395 | // JVMSpec| } |
duke@435 | 396 | void JvmtiClassFileReconstituter::write_method_info(methodHandle method) { |
duke@435 | 397 | AccessFlags access_flags = method->access_flags(); |
duke@435 | 398 | constMethodHandle const_method(thread(), method->constMethod()); |
duke@435 | 399 | u2 generic_signature_index = const_method->generic_signature_index(); |
duke@435 | 400 | typeArrayHandle anno(thread(), method->annotations()); |
duke@435 | 401 | typeArrayHandle param_anno(thread(), method->parameter_annotations()); |
duke@435 | 402 | typeArrayHandle default_anno(thread(), method->annotation_default()); |
duke@435 | 403 | |
duke@435 | 404 | write_u2(access_flags.get_flags() & JVM_RECOGNIZED_METHOD_MODIFIERS); |
duke@435 | 405 | write_u2(const_method->name_index()); |
duke@435 | 406 | write_u2(const_method->signature_index()); |
duke@435 | 407 | |
duke@435 | 408 | // write attributes in the same order javac does, so we can test with byte for |
duke@435 | 409 | // byte comparison |
duke@435 | 410 | int attr_count = 0; |
duke@435 | 411 | if (const_method->code_size() != 0) { |
duke@435 | 412 | ++attr_count; // has Code attribute |
duke@435 | 413 | } |
duke@435 | 414 | if (const_method->has_checked_exceptions()) { |
duke@435 | 415 | ++attr_count; // has Exceptions attribute |
duke@435 | 416 | } |
duke@435 | 417 | if (default_anno.not_null()) { |
duke@435 | 418 | ++attr_count; // has AnnotationDefault attribute |
duke@435 | 419 | } |
duke@435 | 420 | // Deprecated attribute would go here |
duke@435 | 421 | if (access_flags.is_synthetic()) { // FIXME |
duke@435 | 422 | // ++attr_count; |
duke@435 | 423 | } |
duke@435 | 424 | if (generic_signature_index != 0) { |
duke@435 | 425 | ++attr_count; |
duke@435 | 426 | } |
duke@435 | 427 | if (anno.not_null()) { |
duke@435 | 428 | ++attr_count; // has RuntimeVisibleAnnotations attribute |
duke@435 | 429 | } |
duke@435 | 430 | if (param_anno.not_null()) { |
duke@435 | 431 | ++attr_count; // has RuntimeVisibleParameterAnnotations attribute |
duke@435 | 432 | } |
duke@435 | 433 | |
duke@435 | 434 | write_u2(attr_count); |
duke@435 | 435 | if (const_method->code_size() > 0) { |
duke@435 | 436 | write_code_attribute(method); |
duke@435 | 437 | } |
duke@435 | 438 | if (const_method->has_checked_exceptions()) { |
duke@435 | 439 | write_exceptions_attribute(const_method); |
duke@435 | 440 | } |
duke@435 | 441 | if (default_anno.not_null()) { |
duke@435 | 442 | write_annotations_attribute("AnnotationDefault", default_anno); |
duke@435 | 443 | } |
duke@435 | 444 | // Deprecated attribute would go here |
duke@435 | 445 | if (access_flags.is_synthetic()) { |
duke@435 | 446 | // write_synthetic_attribute(); |
duke@435 | 447 | } |
duke@435 | 448 | if (generic_signature_index != 0) { |
duke@435 | 449 | write_signature_attribute(generic_signature_index); |
duke@435 | 450 | } |
duke@435 | 451 | if (anno.not_null()) { |
duke@435 | 452 | write_annotations_attribute("RuntimeVisibleAnnotations", anno); |
duke@435 | 453 | } |
duke@435 | 454 | if (param_anno.not_null()) { |
duke@435 | 455 | write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno); |
duke@435 | 456 | } |
duke@435 | 457 | } |
duke@435 | 458 | |
duke@435 | 459 | // Write the class attributes portion of ClassFile structure |
duke@435 | 460 | // JVMSpec| u2 attributes_count; |
duke@435 | 461 | // JVMSpec| attribute_info attributes[attributes_count]; |
duke@435 | 462 | void JvmtiClassFileReconstituter::write_class_attributes() { |
duke@435 | 463 | u2 inner_classes_length = inner_classes_attribute_length(); |
duke@435 | 464 | symbolHandle generic_signature(thread(), ikh()->generic_signature()); |
duke@435 | 465 | typeArrayHandle anno(thread(), ikh()->class_annotations()); |
duke@435 | 466 | |
duke@435 | 467 | int attr_count = 0; |
duke@435 | 468 | if (generic_signature() != NULL) { |
duke@435 | 469 | ++attr_count; |
duke@435 | 470 | } |
duke@435 | 471 | if (ikh()->source_file_name() != NULL) { |
duke@435 | 472 | ++attr_count; |
duke@435 | 473 | } |
duke@435 | 474 | if (ikh()->source_debug_extension() != NULL) { |
duke@435 | 475 | ++attr_count; |
duke@435 | 476 | } |
duke@435 | 477 | if (inner_classes_length > 0) { |
duke@435 | 478 | ++attr_count; |
duke@435 | 479 | } |
duke@435 | 480 | if (anno.not_null()) { |
duke@435 | 481 | ++attr_count; // has RuntimeVisibleAnnotations attribute |
duke@435 | 482 | } |
duke@435 | 483 | |
duke@435 | 484 | write_u2(attr_count); |
duke@435 | 485 | |
duke@435 | 486 | if (generic_signature() != NULL) { |
duke@435 | 487 | write_signature_attribute(symbol_to_cpool_index(generic_signature())); |
duke@435 | 488 | } |
duke@435 | 489 | if (ikh()->source_file_name() != NULL) { |
duke@435 | 490 | write_source_file_attribute(); |
duke@435 | 491 | } |
duke@435 | 492 | if (ikh()->source_debug_extension() != NULL) { |
duke@435 | 493 | write_source_debug_extension_attribute(); |
duke@435 | 494 | } |
duke@435 | 495 | if (inner_classes_length > 0) { |
duke@435 | 496 | write_inner_classes_attribute(inner_classes_length); |
duke@435 | 497 | } |
duke@435 | 498 | if (anno.not_null()) { |
duke@435 | 499 | write_annotations_attribute("RuntimeVisibleAnnotations", anno); |
duke@435 | 500 | } |
duke@435 | 501 | } |
duke@435 | 502 | |
duke@435 | 503 | // Write the method information portion of ClassFile structure |
duke@435 | 504 | // JVMSpec| u2 methods_count; |
duke@435 | 505 | // JVMSpec| method_info methods[methods_count]; |
duke@435 | 506 | void JvmtiClassFileReconstituter::write_method_infos() { |
duke@435 | 507 | HandleMark hm(thread()); |
duke@435 | 508 | objArrayHandle methods(thread(), ikh()->methods()); |
duke@435 | 509 | int num_methods = methods->length(); |
duke@435 | 510 | |
duke@435 | 511 | write_u2(num_methods); |
duke@435 | 512 | if (JvmtiExport::can_maintain_original_method_order()) { |
duke@435 | 513 | int index; |
duke@435 | 514 | int original_index; |
duke@435 | 515 | int* method_order = NEW_RESOURCE_ARRAY(int, num_methods); |
duke@435 | 516 | |
duke@435 | 517 | // invert the method order mapping |
duke@435 | 518 | for (index = 0; index < num_methods; index++) { |
duke@435 | 519 | original_index = ikh()->method_ordering()->int_at(index); |
duke@435 | 520 | assert(original_index >= 0 && original_index < num_methods, |
duke@435 | 521 | "invalid original method index"); |
duke@435 | 522 | method_order[original_index] = index; |
duke@435 | 523 | } |
duke@435 | 524 | |
duke@435 | 525 | // write in original order |
duke@435 | 526 | for (original_index = 0; original_index < num_methods; original_index++) { |
duke@435 | 527 | index = method_order[original_index]; |
duke@435 | 528 | methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); |
duke@435 | 529 | write_method_info(method); |
duke@435 | 530 | } |
duke@435 | 531 | } else { |
duke@435 | 532 | // method order not preserved just dump the method infos |
duke@435 | 533 | for (int index = 0; index < num_methods; index++) { |
duke@435 | 534 | methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); |
duke@435 | 535 | write_method_info(method); |
duke@435 | 536 | } |
duke@435 | 537 | } |
duke@435 | 538 | } |
duke@435 | 539 | |
duke@435 | 540 | void JvmtiClassFileReconstituter::write_class_file_format() { |
duke@435 | 541 | ReallocMark(); |
duke@435 | 542 | |
duke@435 | 543 | // JVMSpec| ClassFile { |
duke@435 | 544 | // JVMSpec| u4 magic; |
duke@435 | 545 | write_u4(0xCAFEBABE); |
duke@435 | 546 | |
duke@435 | 547 | // JVMSpec| u2 minor_version; |
duke@435 | 548 | // JVMSpec| u2 major_version; |
duke@435 | 549 | write_u2(ikh()->minor_version()); |
duke@435 | 550 | u2 major = ikh()->major_version(); |
duke@435 | 551 | write_u2(major); |
duke@435 | 552 | |
duke@435 | 553 | // JVMSpec| u2 constant_pool_count; |
duke@435 | 554 | // JVMSpec| cp_info constant_pool[constant_pool_count-1]; |
duke@435 | 555 | write_u2(cpool()->length()); |
duke@435 | 556 | copy_cpool_bytes(writeable_address(cpool_size())); |
duke@435 | 557 | |
duke@435 | 558 | // JVMSpec| u2 access_flags; |
duke@435 | 559 | write_u2(ikh()->access_flags().get_flags() & JVM_RECOGNIZED_CLASS_MODIFIERS); |
duke@435 | 560 | |
duke@435 | 561 | // JVMSpec| u2 this_class; |
duke@435 | 562 | // JVMSpec| u2 super_class; |
duke@435 | 563 | write_u2(class_symbol_to_cpool_index(ikh()->name())); |
duke@435 | 564 | klassOop super_class = ikh()->super(); |
duke@435 | 565 | write_u2(super_class == NULL? 0 : // zero for java.lang.Object |
duke@435 | 566 | class_symbol_to_cpool_index(super_class->klass_part()->name())); |
duke@435 | 567 | |
duke@435 | 568 | // JVMSpec| u2 interfaces_count; |
duke@435 | 569 | // JVMSpec| u2 interfaces[interfaces_count]; |
duke@435 | 570 | objArrayHandle interfaces(thread(), ikh()->local_interfaces()); |
duke@435 | 571 | int num_interfaces = interfaces->length(); |
duke@435 | 572 | write_u2(num_interfaces); |
duke@435 | 573 | for (int index = 0; index < num_interfaces; index++) { |
duke@435 | 574 | HandleMark hm(thread()); |
duke@435 | 575 | instanceKlassHandle iikh(thread(), klassOop(interfaces->obj_at(index))); |
duke@435 | 576 | write_u2(class_symbol_to_cpool_index(iikh->name())); |
duke@435 | 577 | } |
duke@435 | 578 | |
duke@435 | 579 | // JVMSpec| u2 fields_count; |
duke@435 | 580 | // JVMSpec| field_info fields[fields_count]; |
duke@435 | 581 | write_field_infos(); |
duke@435 | 582 | |
duke@435 | 583 | // JVMSpec| u2 methods_count; |
duke@435 | 584 | // JVMSpec| method_info methods[methods_count]; |
duke@435 | 585 | write_method_infos(); |
duke@435 | 586 | |
duke@435 | 587 | // JVMSpec| u2 attributes_count; |
duke@435 | 588 | // JVMSpec| attribute_info attributes[attributes_count]; |
duke@435 | 589 | // JVMSpec| } /* end ClassFile 8? |
duke@435 | 590 | write_class_attributes(); |
duke@435 | 591 | } |
duke@435 | 592 | |
duke@435 | 593 | address JvmtiClassFileReconstituter::writeable_address(size_t size) { |
duke@435 | 594 | size_t used_size = _buffer_ptr - _buffer; |
duke@435 | 595 | if (size + used_size >= _buffer_size) { |
duke@435 | 596 | // compute the new buffer size: must be at least twice as big as before |
duke@435 | 597 | // plus whatever new is being used; then convert to nice clean block boundary |
duke@435 | 598 | size_t new_buffer_size = (size + _buffer_size*2 + 1) / initial_buffer_size |
duke@435 | 599 | * initial_buffer_size; |
duke@435 | 600 | |
duke@435 | 601 | // VM goes belly-up if the memory isn't available, so cannot do OOM processing |
duke@435 | 602 | _buffer = REALLOC_RESOURCE_ARRAY(u1, _buffer, _buffer_size, new_buffer_size); |
duke@435 | 603 | _buffer_size = new_buffer_size; |
duke@435 | 604 | _buffer_ptr = _buffer + used_size; |
duke@435 | 605 | } |
duke@435 | 606 | u1* ret_ptr = _buffer_ptr; |
duke@435 | 607 | _buffer_ptr += size; |
duke@435 | 608 | return ret_ptr; |
duke@435 | 609 | } |
duke@435 | 610 | |
duke@435 | 611 | void JvmtiClassFileReconstituter::write_attribute_name_index(const char* name) { |
duke@435 | 612 | unsigned int hash_ignored; |
duke@435 | 613 | symbolOop sym = SymbolTable::lookup_only(name, (int)strlen(name), hash_ignored); |
duke@435 | 614 | assert(sym != NULL, "attribute name symbol not found"); |
duke@435 | 615 | u2 attr_name_index = symbol_to_cpool_index(sym); |
duke@435 | 616 | assert(attr_name_index != 0, "attribute name symbol not in constant pool"); |
duke@435 | 617 | write_u2(attr_name_index); |
duke@435 | 618 | } |
duke@435 | 619 | |
duke@435 | 620 | void JvmtiClassFileReconstituter::write_u1(u1 x) { |
duke@435 | 621 | *writeable_address(1) = x; |
duke@435 | 622 | } |
duke@435 | 623 | |
duke@435 | 624 | void JvmtiClassFileReconstituter::write_u2(u2 x) { |
duke@435 | 625 | Bytes::put_Java_u2(writeable_address(2), x); |
duke@435 | 626 | } |
duke@435 | 627 | |
duke@435 | 628 | void JvmtiClassFileReconstituter::write_u4(u4 x) { |
duke@435 | 629 | Bytes::put_Java_u4(writeable_address(4), x); |
duke@435 | 630 | } |
duke@435 | 631 | |
duke@435 | 632 | void JvmtiClassFileReconstituter::write_u8(u8 x) { |
duke@435 | 633 | Bytes::put_Java_u8(writeable_address(8), x); |
duke@435 | 634 | } |
duke@435 | 635 | |
duke@435 | 636 | void JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh, |
duke@435 | 637 | unsigned char* bytecodes) { |
duke@435 | 638 | // use a BytecodeStream to iterate over the bytecodes. JVM/fast bytecodes |
duke@435 | 639 | // and the breakpoint bytecode are converted to their original bytecodes. |
duke@435 | 640 | |
duke@435 | 641 | BytecodeStream bs(mh); |
duke@435 | 642 | |
duke@435 | 643 | unsigned char* p = bytecodes; |
duke@435 | 644 | Bytecodes::Code code; |
duke@435 | 645 | bool is_rewritten = instanceKlass::cast(mh->method_holder())->is_rewritten(); |
duke@435 | 646 | |
duke@435 | 647 | while ((code = bs.next()) >= 0) { |
duke@435 | 648 | assert(Bytecodes::is_java_code(code), "sanity check"); |
duke@435 | 649 | assert(code != Bytecodes::_breakpoint, "sanity check"); |
duke@435 | 650 | |
duke@435 | 651 | // length of bytecode (mnemonic + operands) |
duke@435 | 652 | address bcp = bs.bcp(); |
jrose@1920 | 653 | int len = bs.instruction_size(); |
duke@435 | 654 | assert(len > 0, "length must be > 0"); |
duke@435 | 655 | |
duke@435 | 656 | // copy the bytecodes |
duke@435 | 657 | *p = (unsigned char) (bs.is_wide()? Bytecodes::_wide : code); |
duke@435 | 658 | if (len > 1) { |
duke@435 | 659 | memcpy(p+1, bcp+1, len-1); |
duke@435 | 660 | } |
duke@435 | 661 | |
duke@435 | 662 | // During linking the get/put and invoke instructions are rewritten |
duke@435 | 663 | // with an index into the constant pool cache. The original constant |
duke@435 | 664 | // pool index must be returned to caller. Rewrite the index. |
duke@435 | 665 | if (is_rewritten && len >= 3) { |
duke@435 | 666 | switch (code) { |
duke@435 | 667 | case Bytecodes::_getstatic : // fall through |
duke@435 | 668 | case Bytecodes::_putstatic : // fall through |
duke@435 | 669 | case Bytecodes::_getfield : // fall through |
duke@435 | 670 | case Bytecodes::_putfield : // fall through |
duke@435 | 671 | case Bytecodes::_invokevirtual : // fall through |
duke@435 | 672 | case Bytecodes::_invokespecial : // fall through |
duke@435 | 673 | case Bytecodes::_invokestatic : // fall through |
jrose@1161 | 674 | case Bytecodes::_invokedynamic : // fall through |
duke@435 | 675 | case Bytecodes::_invokeinterface : |
duke@435 | 676 | assert(len == 3 || (code == Bytecodes::_invokeinterface && len ==5), |
duke@435 | 677 | "sanity check"); |
jrose@1161 | 678 | int cpci = Bytes::get_native_u2(bcp+1); |
jrose@1161 | 679 | bool is_invokedynamic = (EnableInvokeDynamic && code == Bytecodes::_invokedynamic); |
jrose@1161 | 680 | if (is_invokedynamic) |
jrose@1161 | 681 | cpci = Bytes::get_native_u4(bcp+1); |
duke@435 | 682 | // cache cannot be pre-fetched since some classes won't have it yet |
duke@435 | 683 | ConstantPoolCacheEntry* entry = |
jrose@1161 | 684 | mh->constants()->cache()->main_entry_at(cpci); |
duke@435 | 685 | int i = entry->constant_pool_index(); |
duke@435 | 686 | assert(i < mh->constants()->length(), "sanity check"); |
duke@435 | 687 | Bytes::put_Java_u2((address)(p+1), (u2)i); // java byte ordering |
jrose@1161 | 688 | if (is_invokedynamic) *(p+3) = *(p+4) = 0; |
duke@435 | 689 | break; |
duke@435 | 690 | } |
duke@435 | 691 | } |
duke@435 | 692 | |
duke@435 | 693 | p += len; |
duke@435 | 694 | } |
duke@435 | 695 | } |