Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiClassFileReconstituter.cpp @ 11029:9ba41a4a71ff
8004124: Handle and/or warn about SI_KERNEL
Summary: Detect this crash in the signal handler and give a fatal error message instead of making us chase down bugs that don't reproduce
Reviewed-by: kvn, mgerdin, dholmes
author | coleenp |
---|---|
date | Fri, 21 Jun 2013 10:50:19 -0400 |
parents | b5fef8013a95 |
children | de6a9e811145 |
rev | line source |
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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 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 } |