Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiClassFileReconstituter.cpp @ 6080:7432b9db36ff
7165755: OS Information much longer on linux than other platforms
Reviewed-by: sla, dholmes
author | nloodin |
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date | Thu, 10 May 2012 15:44:19 +0200 |
parents | f7c4174b33ba |
children | 04ade88d9712 8150fa46d2ed |
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, LVTT attributes |
0 | 47 // FIXME: fix Synthetic attribute |
48 // FIXME: per Serguei, add error return handling for constantPoolOopDesc::copy_cpool_bytes() | |
49 | |
50 | |
51 // Write the field information portion of ClassFile structure | |
52 // JVMSpec| u2 fields_count; | |
53 // JVMSpec| field_info fields[fields_count]; | |
54 void JvmtiClassFileReconstituter::write_field_infos() { | |
55 HandleMark hm(thread()); | |
56 objArrayHandle fields_anno(thread(), ikh()->fields_annotations()); | |
57 | |
3938 | 58 // Compute the real number of Java fields |
59 int java_fields = ikh()->java_fields_count(); | |
60 | |
3944 | 61 write_u2(java_fields); |
3938 | 62 for (JavaFieldStream fs(ikh()); !fs.done(); fs.next()) { |
63 AccessFlags access_flags = fs.access_flags(); | |
64 int name_index = fs.name_index(); | |
65 int signature_index = fs.signature_index(); | |
66 int initial_value_index = fs.initval_index(); | |
0 | 67 guarantee(name_index != 0 && signature_index != 0, "bad constant pool index for field"); |
3938 | 68 // int offset = ikh()->field_offset( index ); |
69 int generic_signature_index = fs.generic_signature_index(); | |
0 | 70 typeArrayHandle anno(thread(), fields_anno.not_null() ? |
3938 | 71 (typeArrayOop)(fields_anno->obj_at(fs.index())) : |
0 | 72 (typeArrayOop)NULL); |
73 | |
74 // JVMSpec| field_info { | |
75 // JVMSpec| u2 access_flags; | |
76 // JVMSpec| u2 name_index; | |
77 // JVMSpec| u2 descriptor_index; | |
78 // JVMSpec| u2 attributes_count; | |
79 // JVMSpec| attribute_info attributes[attributes_count]; | |
80 // JVMSpec| } | |
81 | |
3938 | 82 write_u2(access_flags.as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS); |
0 | 83 write_u2(name_index); |
84 write_u2(signature_index); | |
85 int attr_count = 0; | |
86 if (initial_value_index != 0) { | |
87 ++attr_count; | |
88 } | |
89 if (access_flags.is_synthetic()) { | |
90 // ++attr_count; | |
91 } | |
92 if (generic_signature_index != 0) { | |
93 ++attr_count; | |
94 } | |
95 if (anno.not_null()) { | |
96 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
97 } | |
98 | |
99 write_u2(attr_count); | |
100 | |
101 if (initial_value_index != 0) { | |
102 write_attribute_name_index("ConstantValue"); | |
103 write_u4(2); //length always 2 | |
104 write_u2(initial_value_index); | |
105 } | |
106 if (access_flags.is_synthetic()) { | |
107 // write_synthetic_attribute(); | |
108 } | |
109 if (generic_signature_index != 0) { | |
110 write_signature_attribute(generic_signature_index); | |
111 } | |
112 if (anno.not_null()) { | |
113 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
114 } | |
115 } | |
116 } | |
117 | |
118 // Write Code attribute | |
119 // JVMSpec| Code_attribute { | |
120 // JVMSpec| u2 attribute_name_index; | |
121 // JVMSpec| u4 attribute_length; | |
122 // JVMSpec| u2 max_stack; | |
123 // JVMSpec| u2 max_locals; | |
124 // JVMSpec| u4 code_length; | |
125 // JVMSpec| u1 code[code_length]; | |
126 // JVMSpec| u2 exception_table_length; | |
127 // JVMSpec| { u2 start_pc; | |
128 // JVMSpec| u2 end_pc; | |
129 // JVMSpec| u2 handler_pc; | |
130 // JVMSpec| u2 catch_type; | |
131 // JVMSpec| } exception_table[exception_table_length]; | |
132 // JVMSpec| u2 attributes_count; | |
133 // JVMSpec| attribute_info attributes[attributes_count]; | |
134 // JVMSpec| } | |
135 void JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) { | |
136 constMethodHandle const_method(thread(), method->constMethod()); | |
137 u2 line_num_cnt = 0; | |
138 int stackmap_len = 0; | |
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139 int local_variable_table_length = 0; |
0 | 140 |
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141 // compute number and length of attributes |
0 | 142 int attr_count = 0; |
143 int attr_size = 0; | |
144 if (const_method->has_linenumber_table()) { | |
145 line_num_cnt = line_number_table_entries(method); | |
146 if (line_num_cnt != 0) { | |
147 ++attr_count; | |
148 // Compute the complete size of the line number table attribute: | |
149 // LineNumberTable_attribute { | |
150 // u2 attribute_name_index; | |
151 // u4 attribute_length; | |
152 // u2 line_number_table_length; | |
153 // { u2 start_pc; | |
154 // u2 line_number; | |
155 // } line_number_table[line_number_table_length]; | |
156 // } | |
157 attr_size += 2 + 4 + 2 + line_num_cnt * (2 + 2); | |
158 } | |
159 } | |
160 if (method->has_stackmap_table()) { | |
161 stackmap_len = method->stackmap_data()->length(); | |
162 if (stackmap_len != 0) { | |
163 ++attr_count; | |
164 // Compute the size of the stack map table attribute (VM stores raw): | |
165 // StackMapTable_attribute { | |
166 // u2 attribute_name_index; | |
167 // u4 attribute_length; | |
168 // u2 number_of_entries; | |
169 // stack_map_frame_entries[number_of_entries]; | |
170 // } | |
171 attr_size += 2 + 4 + stackmap_len; | |
172 } | |
173 } | |
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174 if (method->has_localvariable_table()) { |
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175 local_variable_table_length = method->localvariable_table_length(); |
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176 ++attr_count; |
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177 if (local_variable_table_length != 0) { |
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178 // Compute the size of the local variable table attribute (VM stores raw): |
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179 // LocalVariableTable_attribute { |
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180 // u2 attribute_name_index; |
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181 // u4 attribute_length; |
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182 // u2 local_variable_table_length; |
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183 // { |
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184 // u2 start_pc; |
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185 // u2 length; |
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186 // u2 name_index; |
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187 // u2 descriptor_index; |
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188 // u2 index; |
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189 // } |
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190 attr_size += 2 + 4 + 2 + local_variable_table_length * (2 + 2 + 2 + 2 + 2); |
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191 } |
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192 } |
0 | 193 |
194 typeArrayHandle exception_table(thread(), const_method->exception_table()); | |
195 int exception_table_length = exception_table->length(); | |
196 int exception_table_entries = exception_table_length / 4; | |
197 int code_size = const_method->code_size(); | |
198 int size = | |
199 2+2+4 + // max_stack, max_locals, code_length | |
200 code_size + // code | |
201 2 + // exception_table_length | |
202 (2+2+2+2) * exception_table_entries + // exception_table | |
203 2 + // attributes_count | |
204 attr_size; // attributes | |
205 | |
206 write_attribute_name_index("Code"); | |
207 write_u4(size); | |
208 write_u2(method->max_stack()); | |
209 write_u2(method->max_locals()); | |
210 write_u4(code_size); | |
211 copy_bytecodes(method, (unsigned char*)writeable_address(code_size)); | |
212 write_u2(exception_table_entries); | |
213 for (int index = 0; index < exception_table_length; ) { | |
214 write_u2(exception_table->int_at(index++)); | |
215 write_u2(exception_table->int_at(index++)); | |
216 write_u2(exception_table->int_at(index++)); | |
217 write_u2(exception_table->int_at(index++)); | |
218 } | |
219 write_u2(attr_count); | |
220 if (line_num_cnt != 0) { | |
221 write_line_number_table_attribute(method, line_num_cnt); | |
222 } | |
223 if (stackmap_len != 0) { | |
224 write_stackmap_table_attribute(method, stackmap_len); | |
225 } | |
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226 if (local_variable_table_length != 0) { |
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227 write_local_variable_table_attribute(method, local_variable_table_length); |
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228 } |
0 | 229 } |
230 | |
231 // Write Exceptions attribute | |
232 // JVMSpec| Exceptions_attribute { | |
233 // JVMSpec| u2 attribute_name_index; | |
234 // JVMSpec| u4 attribute_length; | |
235 // JVMSpec| u2 number_of_exceptions; | |
236 // JVMSpec| u2 exception_index_table[number_of_exceptions]; | |
237 // JVMSpec| } | |
238 void JvmtiClassFileReconstituter::write_exceptions_attribute(constMethodHandle const_method) { | |
239 CheckedExceptionElement* checked_exceptions = const_method->checked_exceptions_start(); | |
240 int checked_exceptions_length = const_method->checked_exceptions_length(); | |
241 int size = | |
242 2 + // number_of_exceptions | |
243 2 * checked_exceptions_length; // exception_index_table | |
244 | |
245 write_attribute_name_index("Exceptions"); | |
246 write_u4(size); | |
247 write_u2(checked_exceptions_length); | |
248 for (int index = 0; index < checked_exceptions_length; index++) { | |
249 write_u2(checked_exceptions[index].class_cp_index); | |
250 } | |
251 } | |
252 | |
253 // Write SourceFile attribute | |
254 // JVMSpec| SourceFile_attribute { | |
255 // JVMSpec| u2 attribute_name_index; | |
256 // JVMSpec| u4 attribute_length; | |
257 // JVMSpec| u2 sourcefile_index; | |
258 // JVMSpec| } | |
259 void JvmtiClassFileReconstituter::write_source_file_attribute() { | |
260 assert(ikh()->source_file_name() != NULL, "caller must check"); | |
261 | |
262 write_attribute_name_index("SourceFile"); | |
263 write_u4(2); // always length 2 | |
264 write_u2(symbol_to_cpool_index(ikh()->source_file_name())); | |
265 } | |
266 | |
267 // Write SourceDebugExtension attribute | |
268 // JSR45| SourceDebugExtension_attribute { | |
269 // JSR45| u2 attribute_name_index; | |
270 // JSR45| u4 attribute_length; | |
271 // JSR45| u2 sourcefile_index; | |
272 // JSR45| } | |
273 void JvmtiClassFileReconstituter::write_source_debug_extension_attribute() { | |
274 assert(ikh()->source_debug_extension() != NULL, "caller must check"); | |
275 | |
276 write_attribute_name_index("SourceDebugExtension"); | |
277 write_u4(2); // always length 2 | |
278 write_u2(symbol_to_cpool_index(ikh()->source_debug_extension())); | |
279 } | |
280 | |
281 // Write (generic) Signature attribute | |
282 // JVMSpec| Signature_attribute { | |
283 // JVMSpec| u2 attribute_name_index; | |
284 // JVMSpec| u4 attribute_length; | |
285 // JVMSpec| u2 signature_index; | |
286 // JVMSpec| } | |
287 void JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) { | |
288 write_attribute_name_index("Signature"); | |
289 write_u4(2); // always length 2 | |
290 write_u2(generic_signature_index); | |
291 } | |
292 | |
293 // Compute the number of entries in the InnerClasses attribute | |
294 u2 JvmtiClassFileReconstituter::inner_classes_attribute_length() { | |
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295 InnerClassesIterator iter(ikh()); |
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296 return iter.length(); |
0 | 297 } |
298 | |
299 // Write an annotation attribute. The VM stores them in raw form, so all we need | |
300 // to do is add the attrubute name and fill in the length. | |
301 // JSR202| *Annotations_attribute { | |
302 // JSR202| u2 attribute_name_index; | |
303 // JSR202| u4 attribute_length; | |
304 // JSR202| ... | |
305 // JSR202| } | |
306 void JvmtiClassFileReconstituter::write_annotations_attribute(const char* attr_name, | |
307 typeArrayHandle annos) { | |
308 u4 length = annos->length(); | |
309 write_attribute_name_index(attr_name); | |
310 write_u4(length); | |
311 memcpy(writeable_address(length), annos->byte_at_addr(0), length); | |
312 } | |
313 | |
314 | |
315 // Write InnerClasses attribute | |
316 // JVMSpec| InnerClasses_attribute { | |
317 // JVMSpec| u2 attribute_name_index; | |
318 // JVMSpec| u4 attribute_length; | |
319 // JVMSpec| u2 number_of_classes; | |
320 // JVMSpec| { u2 inner_class_info_index; | |
321 // JVMSpec| u2 outer_class_info_index; | |
322 // JVMSpec| u2 inner_name_index; | |
323 // JVMSpec| u2 inner_class_access_flags; | |
324 // JVMSpec| } classes[number_of_classes]; | |
325 // JVMSpec| } | |
326 void JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) { | |
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327 InnerClassesIterator iter(ikh()); |
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328 guarantee(iter.length() != 0 && iter.length() == length, |
0 | 329 "caller must check"); |
330 u2 entry_count = length / instanceKlass::inner_class_next_offset; | |
331 u4 size = 2 + entry_count * (2+2+2+2); | |
332 | |
333 write_attribute_name_index("InnerClasses"); | |
334 write_u4(size); | |
335 write_u2(entry_count); | |
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336 for (; !iter.done(); iter.next()) { |
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337 write_u2(iter.inner_class_info_index()); |
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338 write_u2(iter.outer_class_info_index()); |
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339 write_u2(iter.inner_name_index()); |
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340 write_u2(iter.inner_access_flags()); |
0 | 341 } |
342 } | |
343 | |
344 // Write Synthetic attribute | |
345 // JVMSpec| Synthetic_attribute { | |
346 // JVMSpec| u2 attribute_name_index; | |
347 // JVMSpec| u4 attribute_length; | |
348 // JVMSpec| } | |
349 void JvmtiClassFileReconstituter::write_synthetic_attribute() { | |
350 write_attribute_name_index("Synthetic"); | |
351 write_u4(0); //length always zero | |
352 } | |
353 | |
354 // Compute size of LineNumberTable | |
355 u2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) { | |
356 // The line number table is compressed so we don't know how big it is until decompressed. | |
357 // Decompression is really fast so we just do it twice. | |
358 u2 num_entries = 0; | |
359 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
360 while (stream.read_pair()) { | |
361 num_entries++; | |
362 } | |
363 return num_entries; | |
364 } | |
365 | |
366 // Write LineNumberTable attribute | |
367 // JVMSpec| LineNumberTable_attribute { | |
368 // JVMSpec| u2 attribute_name_index; | |
369 // JVMSpec| u4 attribute_length; | |
370 // JVMSpec| u2 line_number_table_length; | |
371 // JVMSpec| { u2 start_pc; | |
372 // JVMSpec| u2 line_number; | |
373 // JVMSpec| } line_number_table[line_number_table_length]; | |
374 // JVMSpec| } | |
375 void JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method, | |
376 u2 num_entries) { | |
377 | |
378 write_attribute_name_index("LineNumberTable"); | |
379 write_u4(2 + num_entries * (2 + 2)); | |
380 write_u2(num_entries); | |
381 | |
382 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
383 while (stream.read_pair()) { | |
384 write_u2(stream.bci()); | |
385 write_u2(stream.line()); | |
386 } | |
387 } | |
388 | |
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389 // Write LineNumberTable attribute |
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390 // JVMSpec| LocalVariableTable_attribute { |
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391 // JVMSpec| u2 attribute_name_index; |
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392 // JVMSpec| u4 attribute_length; |
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393 // JVMSpec| u2 local_variable_table_length; |
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394 // JVMSpec| { u2 start_pc; |
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395 // JVMSpec| u2 length; |
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396 // JVMSpec| u2 name_index; |
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397 // JVMSpec| u2 descriptor_index; |
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398 // JVMSpec| u2 index; |
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399 // JVMSpec| } local_variable_table[local_variable_table_length]; |
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400 // JVMSpec| } |
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401 void JvmtiClassFileReconstituter::write_local_variable_table_attribute(methodHandle method, u2 num_entries) { |
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402 write_attribute_name_index("LocalVariableTable"); |
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403 write_u4(2 + num_entries * (2 + 2 + 2 + 2 + 2)); |
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404 write_u2(num_entries); |
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405 |
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406 assert(method->localvariable_table_length() == num_entries, "just checking"); |
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407 |
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408 LocalVariableTableElement *elem = method->localvariable_table_start(); |
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409 for (int j=0; j<method->localvariable_table_length(); j++) { |
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410 write_u2(elem->start_bci); |
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411 write_u2(elem->length); |
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412 write_u2(elem->name_cp_index); |
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413 write_u2(elem->descriptor_cp_index); |
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414 write_u2(elem->slot); |
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415 elem++; |
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416 } |
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417 } |
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418 |
0 | 419 // Write stack map table attribute |
420 // JSR-202| StackMapTable_attribute { | |
421 // JSR-202| u2 attribute_name_index; | |
422 // JSR-202| u4 attribute_length; | |
423 // JSR-202| u2 number_of_entries; | |
424 // JSR-202| stack_map_frame_entries[number_of_entries]; | |
425 // JSR-202| } | |
426 void JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method, | |
427 int stackmap_len) { | |
428 | |
429 write_attribute_name_index("StackMapTable"); | |
430 write_u4(stackmap_len); | |
431 memcpy( | |
432 writeable_address(stackmap_len), | |
433 (void*)(method->stackmap_data()->byte_at_addr(0)), | |
434 stackmap_len); | |
435 } | |
436 | |
437 // Write one method_info structure | |
438 // JVMSpec| method_info { | |
439 // JVMSpec| u2 access_flags; | |
440 // JVMSpec| u2 name_index; | |
441 // JVMSpec| u2 descriptor_index; | |
442 // JVMSpec| u2 attributes_count; | |
443 // JVMSpec| attribute_info attributes[attributes_count]; | |
444 // JVMSpec| } | |
445 void JvmtiClassFileReconstituter::write_method_info(methodHandle method) { | |
446 AccessFlags access_flags = method->access_flags(); | |
447 constMethodHandle const_method(thread(), method->constMethod()); | |
448 u2 generic_signature_index = const_method->generic_signature_index(); | |
449 typeArrayHandle anno(thread(), method->annotations()); | |
450 typeArrayHandle param_anno(thread(), method->parameter_annotations()); | |
451 typeArrayHandle default_anno(thread(), method->annotation_default()); | |
452 | |
453 write_u2(access_flags.get_flags() & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
454 write_u2(const_method->name_index()); | |
455 write_u2(const_method->signature_index()); | |
456 | |
457 // write attributes in the same order javac does, so we can test with byte for | |
458 // byte comparison | |
459 int attr_count = 0; | |
460 if (const_method->code_size() != 0) { | |
461 ++attr_count; // has Code attribute | |
462 } | |
463 if (const_method->has_checked_exceptions()) { | |
464 ++attr_count; // has Exceptions attribute | |
465 } | |
466 if (default_anno.not_null()) { | |
467 ++attr_count; // has AnnotationDefault attribute | |
468 } | |
469 // Deprecated attribute would go here | |
470 if (access_flags.is_synthetic()) { // FIXME | |
471 // ++attr_count; | |
472 } | |
473 if (generic_signature_index != 0) { | |
474 ++attr_count; | |
475 } | |
476 if (anno.not_null()) { | |
477 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
478 } | |
479 if (param_anno.not_null()) { | |
480 ++attr_count; // has RuntimeVisibleParameterAnnotations attribute | |
481 } | |
482 | |
483 write_u2(attr_count); | |
484 if (const_method->code_size() > 0) { | |
485 write_code_attribute(method); | |
486 } | |
487 if (const_method->has_checked_exceptions()) { | |
488 write_exceptions_attribute(const_method); | |
489 } | |
490 if (default_anno.not_null()) { | |
491 write_annotations_attribute("AnnotationDefault", default_anno); | |
492 } | |
493 // Deprecated attribute would go here | |
494 if (access_flags.is_synthetic()) { | |
495 // write_synthetic_attribute(); | |
496 } | |
497 if (generic_signature_index != 0) { | |
498 write_signature_attribute(generic_signature_index); | |
499 } | |
500 if (anno.not_null()) { | |
501 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
502 } | |
503 if (param_anno.not_null()) { | |
504 write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno); | |
505 } | |
506 } | |
507 | |
508 // Write the class attributes portion of ClassFile structure | |
509 // JVMSpec| u2 attributes_count; | |
510 // JVMSpec| attribute_info attributes[attributes_count]; | |
511 void JvmtiClassFileReconstituter::write_class_attributes() { | |
512 u2 inner_classes_length = inner_classes_attribute_length(); | |
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513 Symbol* generic_signature = ikh()->generic_signature(); |
0 | 514 typeArrayHandle anno(thread(), ikh()->class_annotations()); |
515 | |
516 int attr_count = 0; | |
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517 if (generic_signature != NULL) { |
0 | 518 ++attr_count; |
519 } | |
520 if (ikh()->source_file_name() != NULL) { | |
521 ++attr_count; | |
522 } | |
523 if (ikh()->source_debug_extension() != NULL) { | |
524 ++attr_count; | |
525 } | |
526 if (inner_classes_length > 0) { | |
527 ++attr_count; | |
528 } | |
529 if (anno.not_null()) { | |
530 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
531 } | |
532 | |
533 write_u2(attr_count); | |
534 | |
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535 if (generic_signature != NULL) { |
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536 write_signature_attribute(symbol_to_cpool_index(generic_signature)); |
0 | 537 } |
538 if (ikh()->source_file_name() != NULL) { | |
539 write_source_file_attribute(); | |
540 } | |
541 if (ikh()->source_debug_extension() != NULL) { | |
542 write_source_debug_extension_attribute(); | |
543 } | |
544 if (inner_classes_length > 0) { | |
545 write_inner_classes_attribute(inner_classes_length); | |
546 } | |
547 if (anno.not_null()) { | |
548 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
549 } | |
550 } | |
551 | |
552 // Write the method information portion of ClassFile structure | |
553 // JVMSpec| u2 methods_count; | |
554 // JVMSpec| method_info methods[methods_count]; | |
555 void JvmtiClassFileReconstituter::write_method_infos() { | |
556 HandleMark hm(thread()); | |
557 objArrayHandle methods(thread(), ikh()->methods()); | |
558 int num_methods = methods->length(); | |
559 | |
560 write_u2(num_methods); | |
561 if (JvmtiExport::can_maintain_original_method_order()) { | |
562 int index; | |
563 int original_index; | |
564 int* method_order = NEW_RESOURCE_ARRAY(int, num_methods); | |
565 | |
566 // invert the method order mapping | |
567 for (index = 0; index < num_methods; index++) { | |
568 original_index = ikh()->method_ordering()->int_at(index); | |
569 assert(original_index >= 0 && original_index < num_methods, | |
570 "invalid original method index"); | |
571 method_order[original_index] = index; | |
572 } | |
573 | |
574 // write in original order | |
575 for (original_index = 0; original_index < num_methods; original_index++) { | |
576 index = method_order[original_index]; | |
577 methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); | |
578 write_method_info(method); | |
579 } | |
580 } else { | |
581 // method order not preserved just dump the method infos | |
582 for (int index = 0; index < num_methods; index++) { | |
583 methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); | |
584 write_method_info(method); | |
585 } | |
586 } | |
587 } | |
588 | |
589 void JvmtiClassFileReconstituter::write_class_file_format() { | |
590 ReallocMark(); | |
591 | |
592 // JVMSpec| ClassFile { | |
593 // JVMSpec| u4 magic; | |
594 write_u4(0xCAFEBABE); | |
595 | |
596 // JVMSpec| u2 minor_version; | |
597 // JVMSpec| u2 major_version; | |
598 write_u2(ikh()->minor_version()); | |
599 u2 major = ikh()->major_version(); | |
600 write_u2(major); | |
601 | |
602 // JVMSpec| u2 constant_pool_count; | |
603 // JVMSpec| cp_info constant_pool[constant_pool_count-1]; | |
604 write_u2(cpool()->length()); | |
605 copy_cpool_bytes(writeable_address(cpool_size())); | |
606 | |
607 // JVMSpec| u2 access_flags; | |
608 write_u2(ikh()->access_flags().get_flags() & JVM_RECOGNIZED_CLASS_MODIFIERS); | |
609 | |
610 // JVMSpec| u2 this_class; | |
611 // JVMSpec| u2 super_class; | |
612 write_u2(class_symbol_to_cpool_index(ikh()->name())); | |
613 klassOop super_class = ikh()->super(); | |
614 write_u2(super_class == NULL? 0 : // zero for java.lang.Object | |
615 class_symbol_to_cpool_index(super_class->klass_part()->name())); | |
616 | |
617 // JVMSpec| u2 interfaces_count; | |
618 // JVMSpec| u2 interfaces[interfaces_count]; | |
619 objArrayHandle interfaces(thread(), ikh()->local_interfaces()); | |
620 int num_interfaces = interfaces->length(); | |
621 write_u2(num_interfaces); | |
622 for (int index = 0; index < num_interfaces; index++) { | |
623 HandleMark hm(thread()); | |
624 instanceKlassHandle iikh(thread(), klassOop(interfaces->obj_at(index))); | |
625 write_u2(class_symbol_to_cpool_index(iikh->name())); | |
626 } | |
627 | |
628 // JVMSpec| u2 fields_count; | |
629 // JVMSpec| field_info fields[fields_count]; | |
630 write_field_infos(); | |
631 | |
632 // JVMSpec| u2 methods_count; | |
633 // JVMSpec| method_info methods[methods_count]; | |
634 write_method_infos(); | |
635 | |
636 // JVMSpec| u2 attributes_count; | |
637 // JVMSpec| attribute_info attributes[attributes_count]; | |
638 // JVMSpec| } /* end ClassFile 8? | |
639 write_class_attributes(); | |
640 } | |
641 | |
642 address JvmtiClassFileReconstituter::writeable_address(size_t size) { | |
643 size_t used_size = _buffer_ptr - _buffer; | |
644 if (size + used_size >= _buffer_size) { | |
645 // compute the new buffer size: must be at least twice as big as before | |
646 // plus whatever new is being used; then convert to nice clean block boundary | |
647 size_t new_buffer_size = (size + _buffer_size*2 + 1) / initial_buffer_size | |
648 * initial_buffer_size; | |
649 | |
650 // VM goes belly-up if the memory isn't available, so cannot do OOM processing | |
651 _buffer = REALLOC_RESOURCE_ARRAY(u1, _buffer, _buffer_size, new_buffer_size); | |
652 _buffer_size = new_buffer_size; | |
653 _buffer_ptr = _buffer + used_size; | |
654 } | |
655 u1* ret_ptr = _buffer_ptr; | |
656 _buffer_ptr += size; | |
657 return ret_ptr; | |
658 } | |
659 | |
660 void JvmtiClassFileReconstituter::write_attribute_name_index(const char* name) { | |
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661 TempNewSymbol sym = SymbolTable::probe(name, (int)strlen(name)); |
0 | 662 assert(sym != NULL, "attribute name symbol not found"); |
663 u2 attr_name_index = symbol_to_cpool_index(sym); | |
664 assert(attr_name_index != 0, "attribute name symbol not in constant pool"); | |
665 write_u2(attr_name_index); | |
666 } | |
667 | |
668 void JvmtiClassFileReconstituter::write_u1(u1 x) { | |
669 *writeable_address(1) = x; | |
670 } | |
671 | |
672 void JvmtiClassFileReconstituter::write_u2(u2 x) { | |
673 Bytes::put_Java_u2(writeable_address(2), x); | |
674 } | |
675 | |
676 void JvmtiClassFileReconstituter::write_u4(u4 x) { | |
677 Bytes::put_Java_u4(writeable_address(4), x); | |
678 } | |
679 | |
680 void JvmtiClassFileReconstituter::write_u8(u8 x) { | |
681 Bytes::put_Java_u8(writeable_address(8), x); | |
682 } | |
683 | |
684 void JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh, | |
685 unsigned char* bytecodes) { | |
686 // use a BytecodeStream to iterate over the bytecodes. JVM/fast bytecodes | |
687 // and the breakpoint bytecode are converted to their original bytecodes. | |
688 | |
689 BytecodeStream bs(mh); | |
690 | |
691 unsigned char* p = bytecodes; | |
692 Bytecodes::Code code; | |
693 bool is_rewritten = instanceKlass::cast(mh->method_holder())->is_rewritten(); | |
694 | |
695 while ((code = bs.next()) >= 0) { | |
696 assert(Bytecodes::is_java_code(code), "sanity check"); | |
697 assert(code != Bytecodes::_breakpoint, "sanity check"); | |
698 | |
699 // length of bytecode (mnemonic + operands) | |
700 address bcp = bs.bcp(); | |
1565 | 701 int len = bs.instruction_size(); |
0 | 702 assert(len > 0, "length must be > 0"); |
703 | |
704 // copy the bytecodes | |
705 *p = (unsigned char) (bs.is_wide()? Bytecodes::_wide : code); | |
706 if (len > 1) { | |
707 memcpy(p+1, bcp+1, len-1); | |
708 } | |
709 | |
710 // During linking the get/put and invoke instructions are rewritten | |
711 // with an index into the constant pool cache. The original constant | |
712 // pool index must be returned to caller. Rewrite the index. | |
713 if (is_rewritten && len >= 3) { | |
714 switch (code) { | |
715 case Bytecodes::_getstatic : // fall through | |
716 case Bytecodes::_putstatic : // fall through | |
717 case Bytecodes::_getfield : // fall through | |
718 case Bytecodes::_putfield : // fall through | |
719 case Bytecodes::_invokevirtual : // fall through | |
720 case Bytecodes::_invokespecial : // fall through | |
721 case Bytecodes::_invokestatic : // fall through | |
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722 case Bytecodes::_invokedynamic : // fall through |
0 | 723 case Bytecodes::_invokeinterface : |
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724 assert(len == 3 || |
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725 (code == Bytecodes::_invokeinterface && len == 5) || |
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726 (code == Bytecodes::_invokedynamic && len == 5), |
0 | 727 "sanity check"); |
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728 |
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729 int cpci = Bytes::get_native_u2(bcp+1); |
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730 bool is_invokedynamic = (EnableInvokeDynamic && code == Bytecodes::_invokedynamic); |
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731 if (is_invokedynamic) |
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732 cpci = Bytes::get_native_u4(bcp+1); |
0 | 733 // cache cannot be pre-fetched since some classes won't have it yet |
734 ConstantPoolCacheEntry* entry = | |
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735 mh->constants()->cache()->main_entry_at(cpci); |
0 | 736 int i = entry->constant_pool_index(); |
737 assert(i < mh->constants()->length(), "sanity check"); | |
738 Bytes::put_Java_u2((address)(p+1), (u2)i); // java byte ordering | |
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739 if (is_invokedynamic) *(p+3) = *(p+4) = 0; |
0 | 740 break; |
741 } | |
742 } | |
743 | |
744 p += len; | |
745 } | |
746 } |