Mercurial > hg > graal-jvmci-8
annotate src/share/vm/prims/jvmtiClassFileReconstituter.cpp @ 2011:dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
Reviewed-by: twisti
author | jrose |
---|---|
date | Fri, 03 Dec 2010 15:53:57 -0800 |
parents | f95d63e2154a |
children | 3582bf76420e |
rev | line source |
---|---|
0 | 1 /* |
1579 | 2 * Copyright (c) 2005, 2010, 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 * | |
1552
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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" | |
28 #include "prims/jvmtiClassFileReconstituter.hpp" | |
29 #include "runtime/signature.hpp" | |
30 #ifdef TARGET_ARCH_x86 | |
31 # include "bytes_x86.hpp" | |
32 #endif | |
33 #ifdef TARGET_ARCH_sparc | |
34 # include "bytes_sparc.hpp" | |
35 #endif | |
36 #ifdef TARGET_ARCH_zero | |
37 # include "bytes_zero.hpp" | |
38 #endif | |
0 | 39 // FIXME: add Deprecated, LVT, LVTT attributes |
40 // FIXME: fix Synthetic attribute | |
41 // FIXME: per Serguei, add error return handling for constantPoolOopDesc::copy_cpool_bytes() | |
42 | |
43 | |
44 // Write the field information portion of ClassFile structure | |
45 // JVMSpec| u2 fields_count; | |
46 // JVMSpec| field_info fields[fields_count]; | |
47 void JvmtiClassFileReconstituter::write_field_infos() { | |
48 HandleMark hm(thread()); | |
49 typeArrayHandle fields(thread(), ikh()->fields()); | |
50 int fields_length = fields->length(); | |
51 int num_fields = fields_length / instanceKlass::next_offset; | |
52 objArrayHandle fields_anno(thread(), ikh()->fields_annotations()); | |
53 | |
54 write_u2(num_fields); | |
55 for (int index = 0; index < fields_length; index += instanceKlass::next_offset) { | |
56 AccessFlags access_flags; | |
57 int flags = fields->ushort_at(index + instanceKlass::access_flags_offset); | |
58 access_flags.set_flags(flags); | |
59 int name_index = fields->ushort_at(index + instanceKlass::name_index_offset); | |
60 int signature_index = fields->ushort_at(index + instanceKlass::signature_index_offset); | |
61 int initial_value_index = fields->ushort_at(index + instanceKlass::initval_index_offset); | |
62 guarantee(name_index != 0 && signature_index != 0, "bad constant pool index for field"); | |
63 int offset = ikh()->offset_from_fields( index ); | |
64 int generic_signature_index = | |
65 fields->ushort_at(index + instanceKlass::generic_signature_offset); | |
66 typeArrayHandle anno(thread(), fields_anno.not_null() ? | |
67 (typeArrayOop)(fields_anno->obj_at(index / instanceKlass::next_offset)) : | |
68 (typeArrayOop)NULL); | |
69 | |
70 // JVMSpec| field_info { | |
71 // JVMSpec| u2 access_flags; | |
72 // JVMSpec| u2 name_index; | |
73 // JVMSpec| u2 descriptor_index; | |
74 // JVMSpec| u2 attributes_count; | |
75 // JVMSpec| attribute_info attributes[attributes_count]; | |
76 // JVMSpec| } | |
77 | |
78 write_u2(flags & JVM_RECOGNIZED_FIELD_MODIFIERS); | |
79 write_u2(name_index); | |
80 write_u2(signature_index); | |
81 int attr_count = 0; | |
82 if (initial_value_index != 0) { | |
83 ++attr_count; | |
84 } | |
85 if (access_flags.is_synthetic()) { | |
86 // ++attr_count; | |
87 } | |
88 if (generic_signature_index != 0) { | |
89 ++attr_count; | |
90 } | |
91 if (anno.not_null()) { | |
92 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
93 } | |
94 | |
95 write_u2(attr_count); | |
96 | |
97 if (initial_value_index != 0) { | |
98 write_attribute_name_index("ConstantValue"); | |
99 write_u4(2); //length always 2 | |
100 write_u2(initial_value_index); | |
101 } | |
102 if (access_flags.is_synthetic()) { | |
103 // write_synthetic_attribute(); | |
104 } | |
105 if (generic_signature_index != 0) { | |
106 write_signature_attribute(generic_signature_index); | |
107 } | |
108 if (anno.not_null()) { | |
109 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
110 } | |
111 } | |
112 } | |
113 | |
114 // Write Code attribute | |
115 // JVMSpec| Code_attribute { | |
116 // JVMSpec| u2 attribute_name_index; | |
117 // JVMSpec| u4 attribute_length; | |
118 // JVMSpec| u2 max_stack; | |
119 // JVMSpec| u2 max_locals; | |
120 // JVMSpec| u4 code_length; | |
121 // JVMSpec| u1 code[code_length]; | |
122 // JVMSpec| u2 exception_table_length; | |
123 // JVMSpec| { u2 start_pc; | |
124 // JVMSpec| u2 end_pc; | |
125 // JVMSpec| u2 handler_pc; | |
126 // JVMSpec| u2 catch_type; | |
127 // JVMSpec| } exception_table[exception_table_length]; | |
128 // JVMSpec| u2 attributes_count; | |
129 // JVMSpec| attribute_info attributes[attributes_count]; | |
130 // JVMSpec| } | |
131 void JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) { | |
132 constMethodHandle const_method(thread(), method->constMethod()); | |
133 u2 line_num_cnt = 0; | |
134 int stackmap_len = 0; | |
135 | |
136 // compute number and length of attributes -- FIXME: for now no LVT | |
137 int attr_count = 0; | |
138 int attr_size = 0; | |
139 if (const_method->has_linenumber_table()) { | |
140 line_num_cnt = line_number_table_entries(method); | |
141 if (line_num_cnt != 0) { | |
142 ++attr_count; | |
143 // Compute the complete size of the line number table attribute: | |
144 // LineNumberTable_attribute { | |
145 // u2 attribute_name_index; | |
146 // u4 attribute_length; | |
147 // u2 line_number_table_length; | |
148 // { u2 start_pc; | |
149 // u2 line_number; | |
150 // } line_number_table[line_number_table_length]; | |
151 // } | |
152 attr_size += 2 + 4 + 2 + line_num_cnt * (2 + 2); | |
153 } | |
154 } | |
155 if (method->has_stackmap_table()) { | |
156 stackmap_len = method->stackmap_data()->length(); | |
157 if (stackmap_len != 0) { | |
158 ++attr_count; | |
159 // Compute the size of the stack map table attribute (VM stores raw): | |
160 // StackMapTable_attribute { | |
161 // u2 attribute_name_index; | |
162 // u4 attribute_length; | |
163 // u2 number_of_entries; | |
164 // stack_map_frame_entries[number_of_entries]; | |
165 // } | |
166 attr_size += 2 + 4 + stackmap_len; | |
167 } | |
168 } | |
169 | |
170 typeArrayHandle exception_table(thread(), const_method->exception_table()); | |
171 int exception_table_length = exception_table->length(); | |
172 int exception_table_entries = exception_table_length / 4; | |
173 int code_size = const_method->code_size(); | |
174 int size = | |
175 2+2+4 + // max_stack, max_locals, code_length | |
176 code_size + // code | |
177 2 + // exception_table_length | |
178 (2+2+2+2) * exception_table_entries + // exception_table | |
179 2 + // attributes_count | |
180 attr_size; // attributes | |
181 | |
182 write_attribute_name_index("Code"); | |
183 write_u4(size); | |
184 write_u2(method->max_stack()); | |
185 write_u2(method->max_locals()); | |
186 write_u4(code_size); | |
187 copy_bytecodes(method, (unsigned char*)writeable_address(code_size)); | |
188 write_u2(exception_table_entries); | |
189 for (int index = 0; index < exception_table_length; ) { | |
190 write_u2(exception_table->int_at(index++)); | |
191 write_u2(exception_table->int_at(index++)); | |
192 write_u2(exception_table->int_at(index++)); | |
193 write_u2(exception_table->int_at(index++)); | |
194 } | |
195 write_u2(attr_count); | |
196 if (line_num_cnt != 0) { | |
197 write_line_number_table_attribute(method, line_num_cnt); | |
198 } | |
199 if (stackmap_len != 0) { | |
200 write_stackmap_table_attribute(method, stackmap_len); | |
201 } | |
202 | |
203 // FIXME: write LVT attribute | |
204 } | |
205 | |
206 // Write Exceptions attribute | |
207 // JVMSpec| Exceptions_attribute { | |
208 // JVMSpec| u2 attribute_name_index; | |
209 // JVMSpec| u4 attribute_length; | |
210 // JVMSpec| u2 number_of_exceptions; | |
211 // JVMSpec| u2 exception_index_table[number_of_exceptions]; | |
212 // JVMSpec| } | |
213 void JvmtiClassFileReconstituter::write_exceptions_attribute(constMethodHandle const_method) { | |
214 CheckedExceptionElement* checked_exceptions = const_method->checked_exceptions_start(); | |
215 int checked_exceptions_length = const_method->checked_exceptions_length(); | |
216 int size = | |
217 2 + // number_of_exceptions | |
218 2 * checked_exceptions_length; // exception_index_table | |
219 | |
220 write_attribute_name_index("Exceptions"); | |
221 write_u4(size); | |
222 write_u2(checked_exceptions_length); | |
223 for (int index = 0; index < checked_exceptions_length; index++) { | |
224 write_u2(checked_exceptions[index].class_cp_index); | |
225 } | |
226 } | |
227 | |
228 // Write SourceFile attribute | |
229 // JVMSpec| SourceFile_attribute { | |
230 // JVMSpec| u2 attribute_name_index; | |
231 // JVMSpec| u4 attribute_length; | |
232 // JVMSpec| u2 sourcefile_index; | |
233 // JVMSpec| } | |
234 void JvmtiClassFileReconstituter::write_source_file_attribute() { | |
235 assert(ikh()->source_file_name() != NULL, "caller must check"); | |
236 | |
237 write_attribute_name_index("SourceFile"); | |
238 write_u4(2); // always length 2 | |
239 write_u2(symbol_to_cpool_index(ikh()->source_file_name())); | |
240 } | |
241 | |
242 // Write SourceDebugExtension attribute | |
243 // JSR45| SourceDebugExtension_attribute { | |
244 // JSR45| u2 attribute_name_index; | |
245 // JSR45| u4 attribute_length; | |
246 // JSR45| u2 sourcefile_index; | |
247 // JSR45| } | |
248 void JvmtiClassFileReconstituter::write_source_debug_extension_attribute() { | |
249 assert(ikh()->source_debug_extension() != NULL, "caller must check"); | |
250 | |
251 write_attribute_name_index("SourceDebugExtension"); | |
252 write_u4(2); // always length 2 | |
253 write_u2(symbol_to_cpool_index(ikh()->source_debug_extension())); | |
254 } | |
255 | |
256 // Write (generic) Signature attribute | |
257 // JVMSpec| Signature_attribute { | |
258 // JVMSpec| u2 attribute_name_index; | |
259 // JVMSpec| u4 attribute_length; | |
260 // JVMSpec| u2 signature_index; | |
261 // JVMSpec| } | |
262 void JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) { | |
263 write_attribute_name_index("Signature"); | |
264 write_u4(2); // always length 2 | |
265 write_u2(generic_signature_index); | |
266 } | |
267 | |
268 // Compute the number of entries in the InnerClasses attribute | |
269 u2 JvmtiClassFileReconstituter::inner_classes_attribute_length() { | |
270 typeArrayOop inner_class_list = ikh()->inner_classes(); | |
271 return (inner_class_list == NULL) ? 0 : inner_class_list->length(); | |
272 } | |
273 | |
274 // Write an annotation attribute. The VM stores them in raw form, so all we need | |
275 // to do is add the attrubute name and fill in the length. | |
276 // JSR202| *Annotations_attribute { | |
277 // JSR202| u2 attribute_name_index; | |
278 // JSR202| u4 attribute_length; | |
279 // JSR202| ... | |
280 // JSR202| } | |
281 void JvmtiClassFileReconstituter::write_annotations_attribute(const char* attr_name, | |
282 typeArrayHandle annos) { | |
283 u4 length = annos->length(); | |
284 write_attribute_name_index(attr_name); | |
285 write_u4(length); | |
286 memcpy(writeable_address(length), annos->byte_at_addr(0), length); | |
287 } | |
288 | |
289 | |
290 // Write InnerClasses attribute | |
291 // JVMSpec| InnerClasses_attribute { | |
292 // JVMSpec| u2 attribute_name_index; | |
293 // JVMSpec| u4 attribute_length; | |
294 // JVMSpec| u2 number_of_classes; | |
295 // JVMSpec| { u2 inner_class_info_index; | |
296 // JVMSpec| u2 outer_class_info_index; | |
297 // JVMSpec| u2 inner_name_index; | |
298 // JVMSpec| u2 inner_class_access_flags; | |
299 // JVMSpec| } classes[number_of_classes]; | |
300 // JVMSpec| } | |
301 void JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) { | |
302 typeArrayOop inner_class_list = ikh()->inner_classes(); | |
303 guarantee(inner_class_list != NULL && inner_class_list->length() == length, | |
304 "caller must check"); | |
305 typeArrayHandle inner_class_list_h(thread(), inner_class_list); | |
306 assert (length % instanceKlass::inner_class_next_offset == 0, "just checking"); | |
307 u2 entry_count = length / instanceKlass::inner_class_next_offset; | |
308 u4 size = 2 + entry_count * (2+2+2+2); | |
309 | |
310 write_attribute_name_index("InnerClasses"); | |
311 write_u4(size); | |
312 write_u2(entry_count); | |
313 for (int i = 0; i < length; i += instanceKlass::inner_class_next_offset) { | |
314 write_u2(inner_class_list_h->ushort_at( | |
315 i + instanceKlass::inner_class_inner_class_info_offset)); | |
316 write_u2(inner_class_list_h->ushort_at( | |
317 i + instanceKlass::inner_class_outer_class_info_offset)); | |
318 write_u2(inner_class_list_h->ushort_at( | |
319 i + instanceKlass::inner_class_inner_name_offset)); | |
320 write_u2(inner_class_list_h->ushort_at( | |
321 i + instanceKlass::inner_class_access_flags_offset)); | |
322 } | |
323 } | |
324 | |
325 // Write Synthetic attribute | |
326 // JVMSpec| Synthetic_attribute { | |
327 // JVMSpec| u2 attribute_name_index; | |
328 // JVMSpec| u4 attribute_length; | |
329 // JVMSpec| } | |
330 void JvmtiClassFileReconstituter::write_synthetic_attribute() { | |
331 write_attribute_name_index("Synthetic"); | |
332 write_u4(0); //length always zero | |
333 } | |
334 | |
335 // Compute size of LineNumberTable | |
336 u2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) { | |
337 // The line number table is compressed so we don't know how big it is until decompressed. | |
338 // Decompression is really fast so we just do it twice. | |
339 u2 num_entries = 0; | |
340 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
341 while (stream.read_pair()) { | |
342 num_entries++; | |
343 } | |
344 return num_entries; | |
345 } | |
346 | |
347 // Write LineNumberTable attribute | |
348 // JVMSpec| LineNumberTable_attribute { | |
349 // JVMSpec| u2 attribute_name_index; | |
350 // JVMSpec| u4 attribute_length; | |
351 // JVMSpec| u2 line_number_table_length; | |
352 // JVMSpec| { u2 start_pc; | |
353 // JVMSpec| u2 line_number; | |
354 // JVMSpec| } line_number_table[line_number_table_length]; | |
355 // JVMSpec| } | |
356 void JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method, | |
357 u2 num_entries) { | |
358 | |
359 write_attribute_name_index("LineNumberTable"); | |
360 write_u4(2 + num_entries * (2 + 2)); | |
361 write_u2(num_entries); | |
362 | |
363 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
364 while (stream.read_pair()) { | |
365 write_u2(stream.bci()); | |
366 write_u2(stream.line()); | |
367 } | |
368 } | |
369 | |
370 // Write stack map table attribute | |
371 // JSR-202| StackMapTable_attribute { | |
372 // JSR-202| u2 attribute_name_index; | |
373 // JSR-202| u4 attribute_length; | |
374 // JSR-202| u2 number_of_entries; | |
375 // JSR-202| stack_map_frame_entries[number_of_entries]; | |
376 // JSR-202| } | |
377 void JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method, | |
378 int stackmap_len) { | |
379 | |
380 write_attribute_name_index("StackMapTable"); | |
381 write_u4(stackmap_len); | |
382 memcpy( | |
383 writeable_address(stackmap_len), | |
384 (void*)(method->stackmap_data()->byte_at_addr(0)), | |
385 stackmap_len); | |
386 } | |
387 | |
388 // Write one method_info structure | |
389 // JVMSpec| method_info { | |
390 // JVMSpec| u2 access_flags; | |
391 // JVMSpec| u2 name_index; | |
392 // JVMSpec| u2 descriptor_index; | |
393 // JVMSpec| u2 attributes_count; | |
394 // JVMSpec| attribute_info attributes[attributes_count]; | |
395 // JVMSpec| } | |
396 void JvmtiClassFileReconstituter::write_method_info(methodHandle method) { | |
397 AccessFlags access_flags = method->access_flags(); | |
398 constMethodHandle const_method(thread(), method->constMethod()); | |
399 u2 generic_signature_index = const_method->generic_signature_index(); | |
400 typeArrayHandle anno(thread(), method->annotations()); | |
401 typeArrayHandle param_anno(thread(), method->parameter_annotations()); | |
402 typeArrayHandle default_anno(thread(), method->annotation_default()); | |
403 | |
404 write_u2(access_flags.get_flags() & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
405 write_u2(const_method->name_index()); | |
406 write_u2(const_method->signature_index()); | |
407 | |
408 // write attributes in the same order javac does, so we can test with byte for | |
409 // byte comparison | |
410 int attr_count = 0; | |
411 if (const_method->code_size() != 0) { | |
412 ++attr_count; // has Code attribute | |
413 } | |
414 if (const_method->has_checked_exceptions()) { | |
415 ++attr_count; // has Exceptions attribute | |
416 } | |
417 if (default_anno.not_null()) { | |
418 ++attr_count; // has AnnotationDefault attribute | |
419 } | |
420 // Deprecated attribute would go here | |
421 if (access_flags.is_synthetic()) { // FIXME | |
422 // ++attr_count; | |
423 } | |
424 if (generic_signature_index != 0) { | |
425 ++attr_count; | |
426 } | |
427 if (anno.not_null()) { | |
428 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
429 } | |
430 if (param_anno.not_null()) { | |
431 ++attr_count; // has RuntimeVisibleParameterAnnotations attribute | |
432 } | |
433 | |
434 write_u2(attr_count); | |
435 if (const_method->code_size() > 0) { | |
436 write_code_attribute(method); | |
437 } | |
438 if (const_method->has_checked_exceptions()) { | |
439 write_exceptions_attribute(const_method); | |
440 } | |
441 if (default_anno.not_null()) { | |
442 write_annotations_attribute("AnnotationDefault", default_anno); | |
443 } | |
444 // Deprecated attribute would go here | |
445 if (access_flags.is_synthetic()) { | |
446 // write_synthetic_attribute(); | |
447 } | |
448 if (generic_signature_index != 0) { | |
449 write_signature_attribute(generic_signature_index); | |
450 } | |
451 if (anno.not_null()) { | |
452 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
453 } | |
454 if (param_anno.not_null()) { | |
455 write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno); | |
456 } | |
457 } | |
458 | |
459 // Write the class attributes portion of ClassFile structure | |
460 // JVMSpec| u2 attributes_count; | |
461 // JVMSpec| attribute_info attributes[attributes_count]; | |
462 void JvmtiClassFileReconstituter::write_class_attributes() { | |
463 u2 inner_classes_length = inner_classes_attribute_length(); | |
464 symbolHandle generic_signature(thread(), ikh()->generic_signature()); | |
465 typeArrayHandle anno(thread(), ikh()->class_annotations()); | |
466 | |
467 int attr_count = 0; | |
468 if (generic_signature() != NULL) { | |
469 ++attr_count; | |
470 } | |
471 if (ikh()->source_file_name() != NULL) { | |
472 ++attr_count; | |
473 } | |
474 if (ikh()->source_debug_extension() != NULL) { | |
475 ++attr_count; | |
476 } | |
477 if (inner_classes_length > 0) { | |
478 ++attr_count; | |
479 } | |
480 if (anno.not_null()) { | |
481 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
482 } | |
483 | |
484 write_u2(attr_count); | |
485 | |
486 if (generic_signature() != NULL) { | |
487 write_signature_attribute(symbol_to_cpool_index(generic_signature())); | |
488 } | |
489 if (ikh()->source_file_name() != NULL) { | |
490 write_source_file_attribute(); | |
491 } | |
492 if (ikh()->source_debug_extension() != NULL) { | |
493 write_source_debug_extension_attribute(); | |
494 } | |
495 if (inner_classes_length > 0) { | |
496 write_inner_classes_attribute(inner_classes_length); | |
497 } | |
498 if (anno.not_null()) { | |
499 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
500 } | |
501 } | |
502 | |
503 // Write the method information portion of ClassFile structure | |
504 // JVMSpec| u2 methods_count; | |
505 // JVMSpec| method_info methods[methods_count]; | |
506 void JvmtiClassFileReconstituter::write_method_infos() { | |
507 HandleMark hm(thread()); | |
508 objArrayHandle methods(thread(), ikh()->methods()); | |
509 int num_methods = methods->length(); | |
510 | |
511 write_u2(num_methods); | |
512 if (JvmtiExport::can_maintain_original_method_order()) { | |
513 int index; | |
514 int original_index; | |
515 int* method_order = NEW_RESOURCE_ARRAY(int, num_methods); | |
516 | |
517 // invert the method order mapping | |
518 for (index = 0; index < num_methods; index++) { | |
519 original_index = ikh()->method_ordering()->int_at(index); | |
520 assert(original_index >= 0 && original_index < num_methods, | |
521 "invalid original method index"); | |
522 method_order[original_index] = index; | |
523 } | |
524 | |
525 // write in original order | |
526 for (original_index = 0; original_index < num_methods; original_index++) { | |
527 index = method_order[original_index]; | |
528 methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); | |
529 write_method_info(method); | |
530 } | |
531 } else { | |
532 // method order not preserved just dump the method infos | |
533 for (int index = 0; index < num_methods; index++) { | |
534 methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); | |
535 write_method_info(method); | |
536 } | |
537 } | |
538 } | |
539 | |
540 void JvmtiClassFileReconstituter::write_class_file_format() { | |
541 ReallocMark(); | |
542 | |
543 // JVMSpec| ClassFile { | |
544 // JVMSpec| u4 magic; | |
545 write_u4(0xCAFEBABE); | |
546 | |
547 // JVMSpec| u2 minor_version; | |
548 // JVMSpec| u2 major_version; | |
549 write_u2(ikh()->minor_version()); | |
550 u2 major = ikh()->major_version(); | |
551 write_u2(major); | |
552 | |
553 // JVMSpec| u2 constant_pool_count; | |
554 // JVMSpec| cp_info constant_pool[constant_pool_count-1]; | |
555 write_u2(cpool()->length()); | |
556 copy_cpool_bytes(writeable_address(cpool_size())); | |
557 | |
558 // JVMSpec| u2 access_flags; | |
559 write_u2(ikh()->access_flags().get_flags() & JVM_RECOGNIZED_CLASS_MODIFIERS); | |
560 | |
561 // JVMSpec| u2 this_class; | |
562 // JVMSpec| u2 super_class; | |
563 write_u2(class_symbol_to_cpool_index(ikh()->name())); | |
564 klassOop super_class = ikh()->super(); | |
565 write_u2(super_class == NULL? 0 : // zero for java.lang.Object | |
566 class_symbol_to_cpool_index(super_class->klass_part()->name())); | |
567 | |
568 // JVMSpec| u2 interfaces_count; | |
569 // JVMSpec| u2 interfaces[interfaces_count]; | |
570 objArrayHandle interfaces(thread(), ikh()->local_interfaces()); | |
571 int num_interfaces = interfaces->length(); | |
572 write_u2(num_interfaces); | |
573 for (int index = 0; index < num_interfaces; index++) { | |
574 HandleMark hm(thread()); | |
575 instanceKlassHandle iikh(thread(), klassOop(interfaces->obj_at(index))); | |
576 write_u2(class_symbol_to_cpool_index(iikh->name())); | |
577 } | |
578 | |
579 // JVMSpec| u2 fields_count; | |
580 // JVMSpec| field_info fields[fields_count]; | |
581 write_field_infos(); | |
582 | |
583 // JVMSpec| u2 methods_count; | |
584 // JVMSpec| method_info methods[methods_count]; | |
585 write_method_infos(); | |
586 | |
587 // JVMSpec| u2 attributes_count; | |
588 // JVMSpec| attribute_info attributes[attributes_count]; | |
589 // JVMSpec| } /* end ClassFile 8? | |
590 write_class_attributes(); | |
591 } | |
592 | |
593 address JvmtiClassFileReconstituter::writeable_address(size_t size) { | |
594 size_t used_size = _buffer_ptr - _buffer; | |
595 if (size + used_size >= _buffer_size) { | |
596 // compute the new buffer size: must be at least twice as big as before | |
597 // plus whatever new is being used; then convert to nice clean block boundary | |
598 size_t new_buffer_size = (size + _buffer_size*2 + 1) / initial_buffer_size | |
599 * initial_buffer_size; | |
600 | |
601 // VM goes belly-up if the memory isn't available, so cannot do OOM processing | |
602 _buffer = REALLOC_RESOURCE_ARRAY(u1, _buffer, _buffer_size, new_buffer_size); | |
603 _buffer_size = new_buffer_size; | |
604 _buffer_ptr = _buffer + used_size; | |
605 } | |
606 u1* ret_ptr = _buffer_ptr; | |
607 _buffer_ptr += size; | |
608 return ret_ptr; | |
609 } | |
610 | |
611 void JvmtiClassFileReconstituter::write_attribute_name_index(const char* name) { | |
612 unsigned int hash_ignored; | |
613 symbolOop sym = SymbolTable::lookup_only(name, (int)strlen(name), hash_ignored); | |
614 assert(sym != NULL, "attribute name symbol not found"); | |
615 u2 attr_name_index = symbol_to_cpool_index(sym); | |
616 assert(attr_name_index != 0, "attribute name symbol not in constant pool"); | |
617 write_u2(attr_name_index); | |
618 } | |
619 | |
620 void JvmtiClassFileReconstituter::write_u1(u1 x) { | |
621 *writeable_address(1) = x; | |
622 } | |
623 | |
624 void JvmtiClassFileReconstituter::write_u2(u2 x) { | |
625 Bytes::put_Java_u2(writeable_address(2), x); | |
626 } | |
627 | |
628 void JvmtiClassFileReconstituter::write_u4(u4 x) { | |
629 Bytes::put_Java_u4(writeable_address(4), x); | |
630 } | |
631 | |
632 void JvmtiClassFileReconstituter::write_u8(u8 x) { | |
633 Bytes::put_Java_u8(writeable_address(8), x); | |
634 } | |
635 | |
636 void JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh, | |
637 unsigned char* bytecodes) { | |
638 // use a BytecodeStream to iterate over the bytecodes. JVM/fast bytecodes | |
639 // and the breakpoint bytecode are converted to their original bytecodes. | |
640 | |
641 BytecodeStream bs(mh); | |
642 | |
643 unsigned char* p = bytecodes; | |
644 Bytecodes::Code code; | |
645 bool is_rewritten = instanceKlass::cast(mh->method_holder())->is_rewritten(); | |
646 | |
647 while ((code = bs.next()) >= 0) { | |
648 assert(Bytecodes::is_java_code(code), "sanity check"); | |
649 assert(code != Bytecodes::_breakpoint, "sanity check"); | |
650 | |
651 // length of bytecode (mnemonic + operands) | |
652 address bcp = bs.bcp(); | |
1565 | 653 int len = bs.instruction_size(); |
0 | 654 assert(len > 0, "length must be > 0"); |
655 | |
656 // copy the bytecodes | |
657 *p = (unsigned char) (bs.is_wide()? Bytecodes::_wide : code); | |
658 if (len > 1) { | |
659 memcpy(p+1, bcp+1, len-1); | |
660 } | |
661 | |
662 // During linking the get/put and invoke instructions are rewritten | |
663 // with an index into the constant pool cache. The original constant | |
664 // pool index must be returned to caller. Rewrite the index. | |
665 if (is_rewritten && len >= 3) { | |
666 switch (code) { | |
667 case Bytecodes::_getstatic : // fall through | |
668 case Bytecodes::_putstatic : // fall through | |
669 case Bytecodes::_getfield : // fall through | |
670 case Bytecodes::_putfield : // fall through | |
671 case Bytecodes::_invokevirtual : // fall through | |
672 case Bytecodes::_invokespecial : // fall through | |
673 case Bytecodes::_invokestatic : // fall through | |
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674 case Bytecodes::_invokedynamic : // fall through |
0 | 675 case Bytecodes::_invokeinterface : |
676 assert(len == 3 || (code == Bytecodes::_invokeinterface && len ==5), | |
677 "sanity check"); | |
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678 int cpci = Bytes::get_native_u2(bcp+1); |
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679 bool is_invokedynamic = (EnableInvokeDynamic && code == Bytecodes::_invokedynamic); |
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680 if (is_invokedynamic) |
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681 cpci = Bytes::get_native_u4(bcp+1); |
0 | 682 // cache cannot be pre-fetched since some classes won't have it yet |
683 ConstantPoolCacheEntry* entry = | |
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684 mh->constants()->cache()->main_entry_at(cpci); |
0 | 685 int i = entry->constant_pool_index(); |
686 assert(i < mh->constants()->length(), "sanity check"); | |
687 Bytes::put_Java_u2((address)(p+1), (u2)i); // java byte ordering | |
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688 if (is_invokedynamic) *(p+3) = *(p+4) = 0; |
0 | 689 break; |
690 } | |
691 } | |
692 | |
693 p += len; | |
694 } | |
695 } |