Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiClassFileReconstituter.cpp @ 17467:55fb97c4c58d hs25-b65
8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
Summary: Copyright year updated for files modified during 2013
Reviewed-by: twisti, iveresov
| author | mikael |
|---|---|
| date | Tue, 24 Dec 2013 11:48:39 -0800 |
| parents | b5fef8013a95 |
| children | 4ca6dc0799b6 50054b63f0aa |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2005, 2013, 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 attribute |
| 0 | 47 // FIXME: fix Synthetic attribute |
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48 // FIXME: per Serguei, add error return handling for ConstantPool::copy_cpool_bytes() |
| 0 | 49 |
| 50 | |
| 51 // Write the field information portion of ClassFile structure | |
| 52 // JVMSpec| u2 fields_count; | |
| 53 // JVMSpec| field_info fields[fields_count]; | |
| 54 void JvmtiClassFileReconstituter::write_field_infos() { | |
| 55 HandleMark hm(thread()); | |
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56 Array<AnnotationArray*>* fields_anno = ikh()->fields_annotations(); |
| 0 | 57 |
| 3938 | 58 // Compute the real number of Java fields |
| 59 int java_fields = ikh()->java_fields_count(); | |
| 60 | |
| 3944 | 61 write_u2(java_fields); |
| 3938 | 62 for (JavaFieldStream fs(ikh()); !fs.done(); fs.next()) { |
| 63 AccessFlags access_flags = fs.access_flags(); | |
| 64 int name_index = fs.name_index(); | |
| 65 int signature_index = fs.signature_index(); | |
| 66 int initial_value_index = fs.initval_index(); | |
| 0 | 67 guarantee(name_index != 0 && signature_index != 0, "bad constant pool index for field"); |
| 3938 | 68 // int offset = ikh()->field_offset( index ); |
| 69 int generic_signature_index = fs.generic_signature_index(); | |
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70 AnnotationArray* anno = fields_anno == NULL ? NULL : fields_anno->at(fs.index()); |
| 0 | 71 |
| 72 // JVMSpec| field_info { | |
| 73 // JVMSpec| u2 access_flags; | |
| 74 // JVMSpec| u2 name_index; | |
| 75 // JVMSpec| u2 descriptor_index; | |
| 76 // JVMSpec| u2 attributes_count; | |
| 77 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 78 // JVMSpec| } | |
| 79 | |
| 3938 | 80 write_u2(access_flags.as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); |
| 0 | 81 write_u2(name_index); |
| 82 write_u2(signature_index); | |
| 83 int attr_count = 0; | |
| 84 if (initial_value_index != 0) { | |
| 85 ++attr_count; | |
| 86 } | |
| 87 if (access_flags.is_synthetic()) { | |
| 88 // ++attr_count; | |
| 89 } | |
| 90 if (generic_signature_index != 0) { | |
| 91 ++attr_count; | |
| 92 } | |
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93 if (anno != NULL) { |
| 0 | 94 ++attr_count; // has RuntimeVisibleAnnotations attribute |
| 95 } | |
| 96 | |
| 97 write_u2(attr_count); | |
| 98 | |
| 99 if (initial_value_index != 0) { | |
| 100 write_attribute_name_index("ConstantValue"); | |
| 101 write_u4(2); //length always 2 | |
| 102 write_u2(initial_value_index); | |
| 103 } | |
| 104 if (access_flags.is_synthetic()) { | |
| 105 // write_synthetic_attribute(); | |
| 106 } | |
| 107 if (generic_signature_index != 0) { | |
| 108 write_signature_attribute(generic_signature_index); | |
| 109 } | |
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110 if (anno != NULL) { |
| 0 | 111 write_annotations_attribute("RuntimeVisibleAnnotations", anno); |
| 112 } | |
| 113 } | |
| 114 } | |
| 115 | |
| 116 // Write Code attribute | |
| 117 // JVMSpec| Code_attribute { | |
| 118 // JVMSpec| u2 attribute_name_index; | |
| 119 // JVMSpec| u4 attribute_length; | |
| 120 // JVMSpec| u2 max_stack; | |
| 121 // JVMSpec| u2 max_locals; | |
| 122 // JVMSpec| u4 code_length; | |
| 123 // JVMSpec| u1 code[code_length]; | |
| 124 // JVMSpec| u2 exception_table_length; | |
| 125 // JVMSpec| { u2 start_pc; | |
| 126 // JVMSpec| u2 end_pc; | |
| 127 // JVMSpec| u2 handler_pc; | |
| 128 // JVMSpec| u2 catch_type; | |
| 129 // JVMSpec| } exception_table[exception_table_length]; | |
| 130 // JVMSpec| u2 attributes_count; | |
| 131 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 132 // JVMSpec| } | |
| 133 void JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) { | |
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134 ConstMethod* const_method = method->constMethod(); |
| 0 | 135 u2 line_num_cnt = 0; |
| 136 int stackmap_len = 0; | |
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137 int local_variable_table_length = 0; |
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138 int local_variable_type_table_length = 0; |
| 0 | 139 |
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140 // compute number and length of attributes |
| 0 | 141 int attr_count = 0; |
| 142 int attr_size = 0; | |
| 143 if (const_method->has_linenumber_table()) { | |
| 144 line_num_cnt = line_number_table_entries(method); | |
| 145 if (line_num_cnt != 0) { | |
| 146 ++attr_count; | |
| 147 // Compute the complete size of the line number table attribute: | |
| 148 // LineNumberTable_attribute { | |
| 149 // u2 attribute_name_index; | |
| 150 // u4 attribute_length; | |
| 151 // u2 line_number_table_length; | |
| 152 // { u2 start_pc; | |
| 153 // u2 line_number; | |
| 154 // } line_number_table[line_number_table_length]; | |
| 155 // } | |
| 156 attr_size += 2 + 4 + 2 + line_num_cnt * (2 + 2); | |
| 157 } | |
| 158 } | |
| 159 if (method->has_stackmap_table()) { | |
| 160 stackmap_len = method->stackmap_data()->length(); | |
| 161 if (stackmap_len != 0) { | |
| 162 ++attr_count; | |
| 163 // Compute the size of the stack map table attribute (VM stores raw): | |
| 164 // StackMapTable_attribute { | |
| 165 // u2 attribute_name_index; | |
| 166 // u4 attribute_length; | |
| 167 // u2 number_of_entries; | |
| 168 // stack_map_frame_entries[number_of_entries]; | |
| 169 // } | |
| 170 attr_size += 2 + 4 + stackmap_len; | |
| 171 } | |
| 172 } | |
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173 if (method->has_localvariable_table()) { |
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174 local_variable_table_length = method->localvariable_table_length(); |
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175 if (local_variable_table_length != 0) { |
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176 ++attr_count; |
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177 // Compute the size of the local variable table attribute (VM stores raw): |
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178 // LocalVariableTable_attribute { |
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179 // u2 attribute_name_index; |
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180 // u4 attribute_length; |
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181 // u2 local_variable_table_length; |
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182 // { |
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183 // u2 start_pc; |
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184 // u2 length; |
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185 // u2 name_index; |
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186 // u2 descriptor_index; |
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187 // u2 index; |
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188 // } |
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189 attr_size += 2 + 4 + 2 + local_variable_table_length * (2 + 2 + 2 + 2 + 2); |
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190 |
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191 // Local variables with generic signatures must have LVTT entries |
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192 LocalVariableTableElement *elem = method->localvariable_table_start(); |
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193 for (int idx = 0; idx < local_variable_table_length; idx++) { |
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194 if (elem[idx].signature_cp_index != 0) { |
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195 local_variable_type_table_length++; |
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196 } |
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197 } |
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198 |
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199 if (local_variable_type_table_length != 0) { |
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200 ++attr_count; |
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201 // Compute the size of the local variable type table attribute (VM stores raw): |
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202 // LocalVariableTypeTable_attribute { |
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203 // u2 attribute_name_index; |
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204 // u4 attribute_length; |
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205 // u2 local_variable_type_table_length; |
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206 // { |
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207 // u2 start_pc; |
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208 // u2 length; |
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209 // u2 name_index; |
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210 // u2 signature_index; |
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211 // u2 index; |
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212 // } |
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213 attr_size += 2 + 4 + 2 + local_variable_type_table_length * (2 + 2 + 2 + 2 + 2); |
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214 } |
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215 } |
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216 } |
| 0 | 217 |
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218 ExceptionTable exception_table(method()); |
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219 int exception_table_length = exception_table.length(); |
| 0 | 220 int code_size = const_method->code_size(); |
| 221 int size = | |
| 222 2+2+4 + // max_stack, max_locals, code_length | |
| 223 code_size + // code | |
| 224 2 + // exception_table_length | |
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225 (2+2+2+2) * exception_table_length + // exception_table |
| 0 | 226 2 + // attributes_count |
| 227 attr_size; // attributes | |
| 228 | |
| 229 write_attribute_name_index("Code"); | |
| 230 write_u4(size); | |
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231 write_u2(method->verifier_max_stack()); |
| 0 | 232 write_u2(method->max_locals()); |
| 233 write_u4(code_size); | |
| 234 copy_bytecodes(method, (unsigned char*)writeable_address(code_size)); | |
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235 write_u2(exception_table_length); |
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236 for (int index = 0; index < exception_table_length; index++) { |
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237 write_u2(exception_table.start_pc(index)); |
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238 write_u2(exception_table.end_pc(index)); |
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239 write_u2(exception_table.handler_pc(index)); |
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240 write_u2(exception_table.catch_type_index(index)); |
| 0 | 241 } |
| 242 write_u2(attr_count); | |
| 243 if (line_num_cnt != 0) { | |
| 244 write_line_number_table_attribute(method, line_num_cnt); | |
| 245 } | |
| 246 if (stackmap_len != 0) { | |
| 247 write_stackmap_table_attribute(method, stackmap_len); | |
| 248 } | |
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249 if (local_variable_table_length != 0) { |
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250 write_local_variable_table_attribute(method, local_variable_table_length); |
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251 } |
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252 if (local_variable_type_table_length != 0) { |
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253 write_local_variable_type_table_attribute(method, local_variable_type_table_length); |
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254 } |
| 0 | 255 } |
| 256 | |
| 257 // Write Exceptions attribute | |
| 258 // JVMSpec| Exceptions_attribute { | |
| 259 // JVMSpec| u2 attribute_name_index; | |
| 260 // JVMSpec| u4 attribute_length; | |
| 261 // JVMSpec| u2 number_of_exceptions; | |
| 262 // JVMSpec| u2 exception_index_table[number_of_exceptions]; | |
| 263 // JVMSpec| } | |
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264 void JvmtiClassFileReconstituter::write_exceptions_attribute(ConstMethod* const_method) { |
| 0 | 265 CheckedExceptionElement* checked_exceptions = const_method->checked_exceptions_start(); |
| 266 int checked_exceptions_length = const_method->checked_exceptions_length(); | |
| 267 int size = | |
| 268 2 + // number_of_exceptions | |
| 269 2 * checked_exceptions_length; // exception_index_table | |
| 270 | |
| 271 write_attribute_name_index("Exceptions"); | |
| 272 write_u4(size); | |
| 273 write_u2(checked_exceptions_length); | |
| 274 for (int index = 0; index < checked_exceptions_length; index++) { | |
| 275 write_u2(checked_exceptions[index].class_cp_index); | |
| 276 } | |
| 277 } | |
| 278 | |
| 279 // Write SourceFile attribute | |
| 280 // JVMSpec| SourceFile_attribute { | |
| 281 // JVMSpec| u2 attribute_name_index; | |
| 282 // JVMSpec| u4 attribute_length; | |
| 283 // JVMSpec| u2 sourcefile_index; | |
| 284 // JVMSpec| } | |
| 285 void JvmtiClassFileReconstituter::write_source_file_attribute() { | |
| 286 assert(ikh()->source_file_name() != NULL, "caller must check"); | |
| 287 | |
| 288 write_attribute_name_index("SourceFile"); | |
| 289 write_u4(2); // always length 2 | |
| 290 write_u2(symbol_to_cpool_index(ikh()->source_file_name())); | |
| 291 } | |
| 292 | |
| 293 // Write SourceDebugExtension attribute | |
| 294 // JSR45| SourceDebugExtension_attribute { | |
| 295 // JSR45| u2 attribute_name_index; | |
| 296 // JSR45| u4 attribute_length; | |
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297 // JSR45| u1 debug_extension[attribute_length]; |
| 0 | 298 // JSR45| } |
| 299 void JvmtiClassFileReconstituter::write_source_debug_extension_attribute() { | |
| 300 assert(ikh()->source_debug_extension() != NULL, "caller must check"); | |
| 301 | |
| 302 write_attribute_name_index("SourceDebugExtension"); | |
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303 int len = (int)strlen(ikh()->source_debug_extension()); |
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304 write_u4(len); |
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305 u1* ext = (u1*)ikh()->source_debug_extension(); |
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306 for (int i=0; i<len; i++) { |
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307 write_u1(ext[i]); |
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308 } |
| 0 | 309 } |
| 310 | |
| 311 // Write (generic) Signature attribute | |
| 312 // JVMSpec| Signature_attribute { | |
| 313 // JVMSpec| u2 attribute_name_index; | |
| 314 // JVMSpec| u4 attribute_length; | |
| 315 // JVMSpec| u2 signature_index; | |
| 316 // JVMSpec| } | |
| 317 void JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) { | |
| 318 write_attribute_name_index("Signature"); | |
| 319 write_u4(2); // always length 2 | |
| 320 write_u2(generic_signature_index); | |
| 321 } | |
| 322 | |
| 323 // Compute the number of entries in the InnerClasses attribute | |
| 324 u2 JvmtiClassFileReconstituter::inner_classes_attribute_length() { | |
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325 InnerClassesIterator iter(ikh()); |
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326 return iter.length(); |
| 0 | 327 } |
| 328 | |
| 329 // Write an annotation attribute. The VM stores them in raw form, so all we need | |
| 330 // to do is add the attrubute name and fill in the length. | |
| 331 // JSR202| *Annotations_attribute { | |
| 332 // JSR202| u2 attribute_name_index; | |
| 333 // JSR202| u4 attribute_length; | |
| 334 // JSR202| ... | |
| 335 // JSR202| } | |
| 336 void JvmtiClassFileReconstituter::write_annotations_attribute(const char* attr_name, | |
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337 AnnotationArray* annos) { |
| 0 | 338 u4 length = annos->length(); |
| 339 write_attribute_name_index(attr_name); | |
| 340 write_u4(length); | |
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341 memcpy(writeable_address(length), annos->adr_at(0), length); |
| 0 | 342 } |
| 343 | |
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344 // BootstrapMethods_attribute { |
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345 // u2 attribute_name_index; |
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346 // u4 attribute_length; |
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347 // u2 num_bootstrap_methods; |
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348 // { u2 bootstrap_method_ref; |
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349 // u2 num_bootstrap_arguments; |
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350 // u2 bootstrap_arguments[num_bootstrap_arguments]; |
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351 // } bootstrap_methods[num_bootstrap_methods]; |
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352 // } |
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353 void JvmtiClassFileReconstituter::write_bootstrapmethod_attribute() { |
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354 Array<u2>* operands = cpool()->operands(); |
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355 write_attribute_name_index("BootstrapMethods"); |
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356 int num_bootstrap_methods = ConstantPool::operand_array_length(operands); |
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357 |
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358 // calculate length of attribute |
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359 int length = sizeof(u2); // num_bootstrap_methods |
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360 for (int n = 0; n < num_bootstrap_methods; n++) { |
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361 u2 num_bootstrap_arguments = cpool()->operand_argument_count_at(n); |
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362 length += sizeof(u2); // bootstrap_method_ref |
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363 length += sizeof(u2); // num_bootstrap_arguments |
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364 length += sizeof(u2) * num_bootstrap_arguments; // bootstrap_arguments[num_bootstrap_arguments] |
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365 } |
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366 write_u4(length); |
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367 |
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368 // write attribute |
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369 write_u2(num_bootstrap_methods); |
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370 for (int n = 0; n < num_bootstrap_methods; n++) { |
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371 u2 bootstrap_method_ref = cpool()->operand_bootstrap_method_ref_index_at(n); |
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372 u2 num_bootstrap_arguments = cpool()->operand_argument_count_at(n); |
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373 write_u2(bootstrap_method_ref); |
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374 write_u2(num_bootstrap_arguments); |
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375 for (int arg = 0; arg < num_bootstrap_arguments; arg++) { |
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376 u2 bootstrap_argument = cpool()->operand_argument_index_at(n, arg); |
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377 write_u2(bootstrap_argument); |
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378 } |
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379 } |
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380 } |
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381 |
| 0 | 382 |
| 383 // Write InnerClasses attribute | |
| 384 // JVMSpec| InnerClasses_attribute { | |
| 385 // JVMSpec| u2 attribute_name_index; | |
| 386 // JVMSpec| u4 attribute_length; | |
| 387 // JVMSpec| u2 number_of_classes; | |
| 388 // JVMSpec| { u2 inner_class_info_index; | |
| 389 // JVMSpec| u2 outer_class_info_index; | |
| 390 // JVMSpec| u2 inner_name_index; | |
| 391 // JVMSpec| u2 inner_class_access_flags; | |
| 392 // JVMSpec| } classes[number_of_classes]; | |
| 393 // JVMSpec| } | |
| 394 void JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) { | |
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395 InnerClassesIterator iter(ikh()); |
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396 guarantee(iter.length() != 0 && iter.length() == length, |
| 0 | 397 "caller must check"); |
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398 u2 entry_count = length / InstanceKlass::inner_class_next_offset; |
| 0 | 399 u4 size = 2 + entry_count * (2+2+2+2); |
| 400 | |
| 401 write_attribute_name_index("InnerClasses"); | |
| 402 write_u4(size); | |
| 403 write_u2(entry_count); | |
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404 for (; !iter.done(); iter.next()) { |
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405 write_u2(iter.inner_class_info_index()); |
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406 write_u2(iter.outer_class_info_index()); |
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407 write_u2(iter.inner_name_index()); |
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408 write_u2(iter.inner_access_flags()); |
| 0 | 409 } |
| 410 } | |
| 411 | |
| 412 // Write Synthetic attribute | |
| 413 // JVMSpec| Synthetic_attribute { | |
| 414 // JVMSpec| u2 attribute_name_index; | |
| 415 // JVMSpec| u4 attribute_length; | |
| 416 // JVMSpec| } | |
| 417 void JvmtiClassFileReconstituter::write_synthetic_attribute() { | |
| 418 write_attribute_name_index("Synthetic"); | |
| 419 write_u4(0); //length always zero | |
| 420 } | |
| 421 | |
| 422 // Compute size of LineNumberTable | |
| 423 u2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) { | |
| 424 // The line number table is compressed so we don't know how big it is until decompressed. | |
| 425 // Decompression is really fast so we just do it twice. | |
| 426 u2 num_entries = 0; | |
| 427 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
| 428 while (stream.read_pair()) { | |
| 429 num_entries++; | |
| 430 } | |
| 431 return num_entries; | |
| 432 } | |
| 433 | |
| 434 // Write LineNumberTable attribute | |
| 435 // JVMSpec| LineNumberTable_attribute { | |
| 436 // JVMSpec| u2 attribute_name_index; | |
| 437 // JVMSpec| u4 attribute_length; | |
| 438 // JVMSpec| u2 line_number_table_length; | |
| 439 // JVMSpec| { u2 start_pc; | |
| 440 // JVMSpec| u2 line_number; | |
| 441 // JVMSpec| } line_number_table[line_number_table_length]; | |
| 442 // JVMSpec| } | |
| 443 void JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method, | |
| 444 u2 num_entries) { | |
| 445 | |
| 446 write_attribute_name_index("LineNumberTable"); | |
| 447 write_u4(2 + num_entries * (2 + 2)); | |
| 448 write_u2(num_entries); | |
| 449 | |
| 450 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
| 451 while (stream.read_pair()) { | |
| 452 write_u2(stream.bci()); | |
| 453 write_u2(stream.line()); | |
| 454 } | |
| 455 } | |
| 456 | |
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457 // Write LocalVariableTable attribute |
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458 // JVMSpec| LocalVariableTable_attribute { |
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459 // JVMSpec| u2 attribute_name_index; |
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460 // JVMSpec| u4 attribute_length; |
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461 // JVMSpec| u2 local_variable_table_length; |
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462 // JVMSpec| { u2 start_pc; |
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463 // JVMSpec| u2 length; |
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464 // JVMSpec| u2 name_index; |
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465 // JVMSpec| u2 descriptor_index; |
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466 // JVMSpec| u2 index; |
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467 // JVMSpec| } local_variable_table[local_variable_table_length]; |
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468 // JVMSpec| } |
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469 void JvmtiClassFileReconstituter::write_local_variable_table_attribute(methodHandle method, u2 num_entries) { |
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470 write_attribute_name_index("LocalVariableTable"); |
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471 write_u4(2 + num_entries * (2 + 2 + 2 + 2 + 2)); |
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472 write_u2(num_entries); |
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473 |
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474 assert(method->localvariable_table_length() == num_entries, "just checking"); |
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475 |
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476 LocalVariableTableElement *elem = method->localvariable_table_start(); |
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477 for (int j=0; j<method->localvariable_table_length(); j++) { |
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478 write_u2(elem->start_bci); |
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479 write_u2(elem->length); |
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480 write_u2(elem->name_cp_index); |
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481 write_u2(elem->descriptor_cp_index); |
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482 write_u2(elem->slot); |
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483 elem++; |
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484 } |
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485 } |
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486 |
|
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487 // Write LocalVariableTypeTable attribute |
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488 // JVMSpec| LocalVariableTypeTable_attribute { |
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489 // JVMSpec| u2 attribute_name_index; |
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490 // JVMSpec| u4 attribute_length; |
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491 // JVMSpec| u2 local_variable_type_table_length; |
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492 // JVMSpec| { u2 start_pc; |
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493 // JVMSpec| u2 length; |
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494 // JVMSpec| u2 name_index; |
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495 // JVMSpec| u2 signature_index; |
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496 // JVMSpec| u2 index; |
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497 // JVMSpec| } local_variable_type_table[local_variable_type_table_length]; |
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498 // JVMSpec| } |
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499 void JvmtiClassFileReconstituter::write_local_variable_type_table_attribute(methodHandle method, u2 num_entries) { |
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500 write_attribute_name_index("LocalVariableTypeTable"); |
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501 write_u4(2 + num_entries * (2 + 2 + 2 + 2 + 2)); |
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502 write_u2(num_entries); |
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503 |
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504 LocalVariableTableElement *elem = method->localvariable_table_start(); |
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505 for (int j=0; j<method->localvariable_table_length(); j++) { |
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506 if (elem->signature_cp_index > 0) { |
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507 // Local variable has a generic signature - write LVTT attribute entry |
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508 write_u2(elem->start_bci); |
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509 write_u2(elem->length); |
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510 write_u2(elem->name_cp_index); |
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511 write_u2(elem->signature_cp_index); |
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512 write_u2(elem->slot); |
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513 num_entries--; |
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514 } |
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515 elem++; |
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516 } |
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517 assert(num_entries == 0, "just checking"); |
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518 } |
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519 |
| 0 | 520 // Write stack map table attribute |
| 521 // JSR-202| StackMapTable_attribute { | |
| 522 // JSR-202| u2 attribute_name_index; | |
| 523 // JSR-202| u4 attribute_length; | |
| 524 // JSR-202| u2 number_of_entries; | |
| 525 // JSR-202| stack_map_frame_entries[number_of_entries]; | |
| 526 // JSR-202| } | |
| 527 void JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method, | |
| 528 int stackmap_len) { | |
| 529 | |
| 530 write_attribute_name_index("StackMapTable"); | |
| 531 write_u4(stackmap_len); | |
| 532 memcpy( | |
| 533 writeable_address(stackmap_len), | |
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534 (void*)(method->stackmap_data()->adr_at(0)), |
| 0 | 535 stackmap_len); |
| 536 } | |
| 537 | |
| 538 // Write one method_info structure | |
| 539 // JVMSpec| method_info { | |
| 540 // JVMSpec| u2 access_flags; | |
| 541 // JVMSpec| u2 name_index; | |
| 542 // JVMSpec| u2 descriptor_index; | |
| 543 // JVMSpec| u2 attributes_count; | |
| 544 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 545 // JVMSpec| } | |
| 546 void JvmtiClassFileReconstituter::write_method_info(methodHandle method) { | |
| 547 AccessFlags access_flags = method->access_flags(); | |
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548 ConstMethod* const_method = method->constMethod(); |
| 0 | 549 u2 generic_signature_index = const_method->generic_signature_index(); |
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550 AnnotationArray* anno = method->annotations(); |
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551 AnnotationArray* param_anno = method->parameter_annotations(); |
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552 AnnotationArray* default_anno = method->annotation_default(); |
| 0 | 553 |
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554 // skip generated default interface methods |
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555 if (method->is_overpass()) { |
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556 return; |
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557 } |
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558 |
| 0 | 559 write_u2(access_flags.get_flags() & JVM_RECOGNIZED_METHOD_MODIFIERS); |
| 560 write_u2(const_method->name_index()); | |
| 561 write_u2(const_method->signature_index()); | |
| 562 | |
| 563 // write attributes in the same order javac does, so we can test with byte for | |
| 564 // byte comparison | |
| 565 int attr_count = 0; | |
| 566 if (const_method->code_size() != 0) { | |
| 567 ++attr_count; // has Code attribute | |
| 568 } | |
| 569 if (const_method->has_checked_exceptions()) { | |
| 570 ++attr_count; // has Exceptions attribute | |
| 571 } | |
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572 if (default_anno != NULL) { |
| 0 | 573 ++attr_count; // has AnnotationDefault attribute |
| 574 } | |
| 575 // Deprecated attribute would go here | |
| 576 if (access_flags.is_synthetic()) { // FIXME | |
| 577 // ++attr_count; | |
| 578 } | |
| 579 if (generic_signature_index != 0) { | |
| 580 ++attr_count; | |
| 581 } | |
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582 if (anno != NULL) { |
| 0 | 583 ++attr_count; // has RuntimeVisibleAnnotations attribute |
| 584 } | |
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585 if (param_anno != NULL) { |
| 0 | 586 ++attr_count; // has RuntimeVisibleParameterAnnotations attribute |
| 587 } | |
| 588 | |
| 589 write_u2(attr_count); | |
| 590 if (const_method->code_size() > 0) { | |
| 591 write_code_attribute(method); | |
| 592 } | |
| 593 if (const_method->has_checked_exceptions()) { | |
| 594 write_exceptions_attribute(const_method); | |
| 595 } | |
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596 if (default_anno != NULL) { |
| 0 | 597 write_annotations_attribute("AnnotationDefault", default_anno); |
| 598 } | |
| 599 // Deprecated attribute would go here | |
| 600 if (access_flags.is_synthetic()) { | |
| 601 // write_synthetic_attribute(); | |
| 602 } | |
| 603 if (generic_signature_index != 0) { | |
| 604 write_signature_attribute(generic_signature_index); | |
| 605 } | |
|
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606 if (anno != NULL) { |
| 0 | 607 write_annotations_attribute("RuntimeVisibleAnnotations", anno); |
| 608 } | |
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609 if (param_anno != NULL) { |
| 0 | 610 write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno); |
| 611 } | |
| 612 } | |
| 613 | |
| 614 // Write the class attributes portion of ClassFile structure | |
| 615 // JVMSpec| u2 attributes_count; | |
| 616 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 617 void JvmtiClassFileReconstituter::write_class_attributes() { | |
| 618 u2 inner_classes_length = inner_classes_attribute_length(); | |
|
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619 Symbol* generic_signature = ikh()->generic_signature(); |
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620 AnnotationArray* anno = ikh()->class_annotations(); |
| 0 | 621 |
| 622 int attr_count = 0; | |
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623 if (generic_signature != NULL) { |
| 0 | 624 ++attr_count; |
| 625 } | |
| 626 if (ikh()->source_file_name() != NULL) { | |
| 627 ++attr_count; | |
| 628 } | |
| 629 if (ikh()->source_debug_extension() != NULL) { | |
| 630 ++attr_count; | |
| 631 } | |
| 632 if (inner_classes_length > 0) { | |
| 633 ++attr_count; | |
| 634 } | |
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635 if (anno != NULL) { |
| 0 | 636 ++attr_count; // has RuntimeVisibleAnnotations attribute |
| 637 } | |
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638 if (cpool()->operands() != NULL) { |
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639 ++attr_count; |
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640 } |
| 0 | 641 |
| 642 write_u2(attr_count); | |
| 643 | |
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644 if (generic_signature != NULL) { |
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645 write_signature_attribute(symbol_to_cpool_index(generic_signature)); |
| 0 | 646 } |
| 647 if (ikh()->source_file_name() != NULL) { | |
| 648 write_source_file_attribute(); | |
| 649 } | |
| 650 if (ikh()->source_debug_extension() != NULL) { | |
| 651 write_source_debug_extension_attribute(); | |
| 652 } | |
| 653 if (inner_classes_length > 0) { | |
| 654 write_inner_classes_attribute(inner_classes_length); | |
| 655 } | |
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656 if (anno != NULL) { |
| 0 | 657 write_annotations_attribute("RuntimeVisibleAnnotations", anno); |
| 658 } | |
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659 if (cpool()->operands() != NULL) { |
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660 write_bootstrapmethod_attribute(); |
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661 } |
| 0 | 662 } |
| 663 | |
| 664 // Write the method information portion of ClassFile structure | |
| 665 // JVMSpec| u2 methods_count; | |
| 666 // JVMSpec| method_info methods[methods_count]; | |
| 667 void JvmtiClassFileReconstituter::write_method_infos() { | |
| 668 HandleMark hm(thread()); | |
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669 Array<Method*>* methods = ikh()->methods(); |
| 0 | 670 int num_methods = methods->length(); |
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671 int num_overpass = 0; |
| 0 | 672 |
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673 // count the generated default interface methods |
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674 // these will not be re-created by write_method_info |
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675 // and should not be included in the total count |
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676 for (int index = 0; index < num_methods; index++) { |
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677 Method* method = methods->at(index); |
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678 if (method->is_overpass()) { |
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679 num_overpass++; |
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680 } |
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681 } |
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682 |
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683 write_u2(num_methods - num_overpass); |
| 0 | 684 if (JvmtiExport::can_maintain_original_method_order()) { |
| 685 int index; | |
| 686 int original_index; | |
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687 intArray method_order(num_methods, 0); |
| 0 | 688 |
| 689 // invert the method order mapping | |
| 690 for (index = 0; index < num_methods; index++) { | |
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691 original_index = ikh()->method_ordering()->at(index); |
| 0 | 692 assert(original_index >= 0 && original_index < num_methods, |
| 693 "invalid original method index"); | |
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694 method_order.at_put(original_index, index); |
| 0 | 695 } |
| 696 | |
| 697 // write in original order | |
| 698 for (original_index = 0; original_index < num_methods; original_index++) { | |
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699 index = method_order.at(original_index); |
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700 methodHandle method(thread(), methods->at(index)); |
| 0 | 701 write_method_info(method); |
| 702 } | |
| 703 } else { | |
| 704 // method order not preserved just dump the method infos | |
| 705 for (int index = 0; index < num_methods; index++) { | |
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706 methodHandle method(thread(), methods->at(index)); |
| 0 | 707 write_method_info(method); |
| 708 } | |
| 709 } | |
| 710 } | |
| 711 | |
| 712 void JvmtiClassFileReconstituter::write_class_file_format() { | |
| 713 ReallocMark(); | |
| 714 | |
| 715 // JVMSpec| ClassFile { | |
| 716 // JVMSpec| u4 magic; | |
| 717 write_u4(0xCAFEBABE); | |
| 718 | |
| 719 // JVMSpec| u2 minor_version; | |
| 720 // JVMSpec| u2 major_version; | |
| 721 write_u2(ikh()->minor_version()); | |
| 722 u2 major = ikh()->major_version(); | |
| 723 write_u2(major); | |
| 724 | |
| 725 // JVMSpec| u2 constant_pool_count; | |
| 726 // JVMSpec| cp_info constant_pool[constant_pool_count-1]; | |
| 727 write_u2(cpool()->length()); | |
| 728 copy_cpool_bytes(writeable_address(cpool_size())); | |
| 729 | |
| 730 // JVMSpec| u2 access_flags; | |
| 731 write_u2(ikh()->access_flags().get_flags() & JVM_RECOGNIZED_CLASS_MODIFIERS); | |
| 732 | |
| 733 // JVMSpec| u2 this_class; | |
| 734 // JVMSpec| u2 super_class; | |
| 735 write_u2(class_symbol_to_cpool_index(ikh()->name())); | |
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736 Klass* super_class = ikh()->super(); |
| 0 | 737 write_u2(super_class == NULL? 0 : // zero for java.lang.Object |
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738 class_symbol_to_cpool_index(super_class->name())); |
| 0 | 739 |
| 740 // JVMSpec| u2 interfaces_count; | |
| 741 // JVMSpec| u2 interfaces[interfaces_count]; | |
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742 Array<Klass*>* interfaces = ikh()->local_interfaces(); |
| 0 | 743 int num_interfaces = interfaces->length(); |
| 744 write_u2(num_interfaces); | |
| 745 for (int index = 0; index < num_interfaces; index++) { | |
| 746 HandleMark hm(thread()); | |
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747 instanceKlassHandle iikh(thread(), interfaces->at(index)); |
| 0 | 748 write_u2(class_symbol_to_cpool_index(iikh->name())); |
| 749 } | |
| 750 | |
| 751 // JVMSpec| u2 fields_count; | |
| 752 // JVMSpec| field_info fields[fields_count]; | |
| 753 write_field_infos(); | |
| 754 | |
| 755 // JVMSpec| u2 methods_count; | |
| 756 // JVMSpec| method_info methods[methods_count]; | |
| 757 write_method_infos(); | |
| 758 | |
| 759 // JVMSpec| u2 attributes_count; | |
| 760 // JVMSpec| attribute_info attributes[attributes_count]; | |
| 761 // JVMSpec| } /* end ClassFile 8? | |
| 762 write_class_attributes(); | |
| 763 } | |
| 764 | |
| 765 address JvmtiClassFileReconstituter::writeable_address(size_t size) { | |
| 766 size_t used_size = _buffer_ptr - _buffer; | |
| 767 if (size + used_size >= _buffer_size) { | |
| 768 // compute the new buffer size: must be at least twice as big as before | |
| 769 // plus whatever new is being used; then convert to nice clean block boundary | |
| 770 size_t new_buffer_size = (size + _buffer_size*2 + 1) / initial_buffer_size | |
| 771 * initial_buffer_size; | |
| 772 | |
| 773 // VM goes belly-up if the memory isn't available, so cannot do OOM processing | |
| 774 _buffer = REALLOC_RESOURCE_ARRAY(u1, _buffer, _buffer_size, new_buffer_size); | |
| 775 _buffer_size = new_buffer_size; | |
| 776 _buffer_ptr = _buffer + used_size; | |
| 777 } | |
| 778 u1* ret_ptr = _buffer_ptr; | |
| 779 _buffer_ptr += size; | |
| 780 return ret_ptr; | |
| 781 } | |
| 782 | |
| 783 void JvmtiClassFileReconstituter::write_attribute_name_index(const char* name) { | |
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784 TempNewSymbol sym = SymbolTable::probe(name, (int)strlen(name)); |
| 0 | 785 assert(sym != NULL, "attribute name symbol not found"); |
| 786 u2 attr_name_index = symbol_to_cpool_index(sym); | |
| 787 assert(attr_name_index != 0, "attribute name symbol not in constant pool"); | |
| 788 write_u2(attr_name_index); | |
| 789 } | |
| 790 | |
| 791 void JvmtiClassFileReconstituter::write_u1(u1 x) { | |
| 792 *writeable_address(1) = x; | |
| 793 } | |
| 794 | |
| 795 void JvmtiClassFileReconstituter::write_u2(u2 x) { | |
| 796 Bytes::put_Java_u2(writeable_address(2), x); | |
| 797 } | |
| 798 | |
| 799 void JvmtiClassFileReconstituter::write_u4(u4 x) { | |
| 800 Bytes::put_Java_u4(writeable_address(4), x); | |
| 801 } | |
| 802 | |
| 803 void JvmtiClassFileReconstituter::write_u8(u8 x) { | |
| 804 Bytes::put_Java_u8(writeable_address(8), x); | |
| 805 } | |
| 806 | |
| 807 void JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh, | |
| 808 unsigned char* bytecodes) { | |
| 809 // use a BytecodeStream to iterate over the bytecodes. JVM/fast bytecodes | |
| 810 // and the breakpoint bytecode are converted to their original bytecodes. | |
| 811 | |
| 812 BytecodeStream bs(mh); | |
| 813 | |
| 814 unsigned char* p = bytecodes; | |
| 815 Bytecodes::Code code; | |
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816 bool is_rewritten = mh->method_holder()->is_rewritten(); |
| 0 | 817 |
| 818 while ((code = bs.next()) >= 0) { | |
| 819 assert(Bytecodes::is_java_code(code), "sanity check"); | |
| 820 assert(code != Bytecodes::_breakpoint, "sanity check"); | |
| 821 | |
| 822 // length of bytecode (mnemonic + operands) | |
| 823 address bcp = bs.bcp(); | |
| 1565 | 824 int len = bs.instruction_size(); |
| 0 | 825 assert(len > 0, "length must be > 0"); |
| 826 | |
| 827 // copy the bytecodes | |
| 828 *p = (unsigned char) (bs.is_wide()? Bytecodes::_wide : code); | |
| 829 if (len > 1) { | |
| 830 memcpy(p+1, bcp+1, len-1); | |
| 831 } | |
| 832 | |
| 833 // During linking the get/put and invoke instructions are rewritten | |
| 834 // with an index into the constant pool cache. The original constant | |
| 835 // pool index must be returned to caller. Rewrite the index. | |
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836 if (is_rewritten && len > 1) { |
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837 bool is_wide = false; |
| 0 | 838 switch (code) { |
| 839 case Bytecodes::_getstatic : // fall through | |
| 840 case Bytecodes::_putstatic : // fall through | |
| 841 case Bytecodes::_getfield : // fall through | |
| 842 case Bytecodes::_putfield : // fall through | |
| 843 case Bytecodes::_invokevirtual : // fall through | |
| 844 case Bytecodes::_invokespecial : // fall through | |
| 845 case Bytecodes::_invokestatic : // fall through | |
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846 case Bytecodes::_invokedynamic : // fall through |
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847 case Bytecodes::_invokeinterface : { |
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848 assert(len == 3 || |
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849 (code == Bytecodes::_invokeinterface && len == 5) || |
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850 (code == Bytecodes::_invokedynamic && len == 5), |
| 0 | 851 "sanity check"); |
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852 |
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853 int cpci = Bytes::get_native_u2(bcp+1); |
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854 bool is_invokedynamic = (EnableInvokeDynamic && code == Bytecodes::_invokedynamic); |
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855 ConstantPoolCacheEntry* entry; |
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856 if (is_invokedynamic) { |
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857 cpci = Bytes::get_native_u4(bcp+1); |
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858 entry = mh->constants()->invokedynamic_cp_cache_entry_at(cpci); |
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859 } else { |
| 0 | 860 // cache cannot be pre-fetched since some classes won't have it yet |
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861 entry = mh->constants()->cache()->entry_at(cpci); |
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862 } |
| 0 | 863 int i = entry->constant_pool_index(); |
| 864 assert(i < mh->constants()->length(), "sanity check"); | |
| 865 Bytes::put_Java_u2((address)(p+1), (u2)i); // java byte ordering | |
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866 if (is_invokedynamic) *(p+3) = *(p+4) = 0; |
| 0 | 867 break; |
| 868 } | |
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869 case Bytecodes::_ldc_w: |
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870 is_wide = true; // fall through |
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871 case Bytecodes::_ldc: { |
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872 if (bs.raw_code() == Bytecodes::_fast_aldc || bs.raw_code() == Bytecodes::_fast_aldc_w) { |
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873 int cpci = is_wide ? Bytes::get_native_u2(bcp+1) : (u1)(*(bcp+1)); |
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874 int i = mh->constants()->object_to_cp_index(cpci); |
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875 assert(i < mh->constants()->length(), "sanity check"); |
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876 if (is_wide) { |
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877 Bytes::put_Java_u2((address)(p+1), (u2)i); // java byte ordering |
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878 } else { |
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879 *(p+1) = (u1)i; |
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880 } |
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881 } |
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882 break; |
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883 } |
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884 } |
| 0 | 885 } |
| 886 | |
| 887 p += len; | |
| 888 } | |
| 889 } |