Mercurial > hg > graal-compiler
annotate src/share/vm/prims/jvmtiClassFileReconstituter.cpp @ 2461:758ba0bf7bcc
7012087: JSR 292 Misleading exception message for a non-bound MH for a virtual method
Summary: Improve error message formatting to give more information to user. Also, catch a corner case related to 6930553 and 6844449.
Reviewed-by: kvn
author | jrose |
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date | Thu, 07 Apr 2011 17:12:21 -0700 |
parents | b92c45f2bc75 |
children | 1d1603768966 |
rev | line source |
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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 | |
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39 #ifdef TARGET_ARCH_arm |
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40 # include "bytes_arm.hpp" |
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41 #endif |
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42 #ifdef TARGET_ARCH_ppc |
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43 # include "bytes_ppc.hpp" |
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44 #endif |
0 | 45 // FIXME: add Deprecated, LVT, LVTT attributes |
46 // FIXME: fix Synthetic attribute | |
47 // FIXME: per Serguei, add error return handling for constantPoolOopDesc::copy_cpool_bytes() | |
48 | |
49 | |
50 // Write the field information portion of ClassFile structure | |
51 // JVMSpec| u2 fields_count; | |
52 // JVMSpec| field_info fields[fields_count]; | |
53 void JvmtiClassFileReconstituter::write_field_infos() { | |
54 HandleMark hm(thread()); | |
55 typeArrayHandle fields(thread(), ikh()->fields()); | |
56 int fields_length = fields->length(); | |
57 int num_fields = fields_length / instanceKlass::next_offset; | |
58 objArrayHandle fields_anno(thread(), ikh()->fields_annotations()); | |
59 | |
60 write_u2(num_fields); | |
61 for (int index = 0; index < fields_length; index += instanceKlass::next_offset) { | |
62 AccessFlags access_flags; | |
63 int flags = fields->ushort_at(index + instanceKlass::access_flags_offset); | |
64 access_flags.set_flags(flags); | |
65 int name_index = fields->ushort_at(index + instanceKlass::name_index_offset); | |
66 int signature_index = fields->ushort_at(index + instanceKlass::signature_index_offset); | |
67 int initial_value_index = fields->ushort_at(index + instanceKlass::initval_index_offset); | |
68 guarantee(name_index != 0 && signature_index != 0, "bad constant pool index for field"); | |
69 int offset = ikh()->offset_from_fields( index ); | |
70 int generic_signature_index = | |
71 fields->ushort_at(index + instanceKlass::generic_signature_offset); | |
72 typeArrayHandle anno(thread(), fields_anno.not_null() ? | |
73 (typeArrayOop)(fields_anno->obj_at(index / instanceKlass::next_offset)) : | |
74 (typeArrayOop)NULL); | |
75 | |
76 // JVMSpec| field_info { | |
77 // JVMSpec| u2 access_flags; | |
78 // JVMSpec| u2 name_index; | |
79 // JVMSpec| u2 descriptor_index; | |
80 // JVMSpec| u2 attributes_count; | |
81 // JVMSpec| attribute_info attributes[attributes_count]; | |
82 // JVMSpec| } | |
83 | |
84 write_u2(flags & JVM_RECOGNIZED_FIELD_MODIFIERS); | |
85 write_u2(name_index); | |
86 write_u2(signature_index); | |
87 int attr_count = 0; | |
88 if (initial_value_index != 0) { | |
89 ++attr_count; | |
90 } | |
91 if (access_flags.is_synthetic()) { | |
92 // ++attr_count; | |
93 } | |
94 if (generic_signature_index != 0) { | |
95 ++attr_count; | |
96 } | |
97 if (anno.not_null()) { | |
98 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
99 } | |
100 | |
101 write_u2(attr_count); | |
102 | |
103 if (initial_value_index != 0) { | |
104 write_attribute_name_index("ConstantValue"); | |
105 write_u4(2); //length always 2 | |
106 write_u2(initial_value_index); | |
107 } | |
108 if (access_flags.is_synthetic()) { | |
109 // write_synthetic_attribute(); | |
110 } | |
111 if (generic_signature_index != 0) { | |
112 write_signature_attribute(generic_signature_index); | |
113 } | |
114 if (anno.not_null()) { | |
115 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
116 } | |
117 } | |
118 } | |
119 | |
120 // Write Code attribute | |
121 // JVMSpec| Code_attribute { | |
122 // JVMSpec| u2 attribute_name_index; | |
123 // JVMSpec| u4 attribute_length; | |
124 // JVMSpec| u2 max_stack; | |
125 // JVMSpec| u2 max_locals; | |
126 // JVMSpec| u4 code_length; | |
127 // JVMSpec| u1 code[code_length]; | |
128 // JVMSpec| u2 exception_table_length; | |
129 // JVMSpec| { u2 start_pc; | |
130 // JVMSpec| u2 end_pc; | |
131 // JVMSpec| u2 handler_pc; | |
132 // JVMSpec| u2 catch_type; | |
133 // JVMSpec| } exception_table[exception_table_length]; | |
134 // JVMSpec| u2 attributes_count; | |
135 // JVMSpec| attribute_info attributes[attributes_count]; | |
136 // JVMSpec| } | |
137 void JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) { | |
138 constMethodHandle const_method(thread(), method->constMethod()); | |
139 u2 line_num_cnt = 0; | |
140 int stackmap_len = 0; | |
141 | |
142 // compute number and length of attributes -- FIXME: for now no LVT | |
143 int attr_count = 0; | |
144 int attr_size = 0; | |
145 if (const_method->has_linenumber_table()) { | |
146 line_num_cnt = line_number_table_entries(method); | |
147 if (line_num_cnt != 0) { | |
148 ++attr_count; | |
149 // Compute the complete size of the line number table attribute: | |
150 // LineNumberTable_attribute { | |
151 // u2 attribute_name_index; | |
152 // u4 attribute_length; | |
153 // u2 line_number_table_length; | |
154 // { u2 start_pc; | |
155 // u2 line_number; | |
156 // } line_number_table[line_number_table_length]; | |
157 // } | |
158 attr_size += 2 + 4 + 2 + line_num_cnt * (2 + 2); | |
159 } | |
160 } | |
161 if (method->has_stackmap_table()) { | |
162 stackmap_len = method->stackmap_data()->length(); | |
163 if (stackmap_len != 0) { | |
164 ++attr_count; | |
165 // Compute the size of the stack map table attribute (VM stores raw): | |
166 // StackMapTable_attribute { | |
167 // u2 attribute_name_index; | |
168 // u4 attribute_length; | |
169 // u2 number_of_entries; | |
170 // stack_map_frame_entries[number_of_entries]; | |
171 // } | |
172 attr_size += 2 + 4 + stackmap_len; | |
173 } | |
174 } | |
175 | |
176 typeArrayHandle exception_table(thread(), const_method->exception_table()); | |
177 int exception_table_length = exception_table->length(); | |
178 int exception_table_entries = exception_table_length / 4; | |
179 int code_size = const_method->code_size(); | |
180 int size = | |
181 2+2+4 + // max_stack, max_locals, code_length | |
182 code_size + // code | |
183 2 + // exception_table_length | |
184 (2+2+2+2) * exception_table_entries + // exception_table | |
185 2 + // attributes_count | |
186 attr_size; // attributes | |
187 | |
188 write_attribute_name_index("Code"); | |
189 write_u4(size); | |
190 write_u2(method->max_stack()); | |
191 write_u2(method->max_locals()); | |
192 write_u4(code_size); | |
193 copy_bytecodes(method, (unsigned char*)writeable_address(code_size)); | |
194 write_u2(exception_table_entries); | |
195 for (int index = 0; index < exception_table_length; ) { | |
196 write_u2(exception_table->int_at(index++)); | |
197 write_u2(exception_table->int_at(index++)); | |
198 write_u2(exception_table->int_at(index++)); | |
199 write_u2(exception_table->int_at(index++)); | |
200 } | |
201 write_u2(attr_count); | |
202 if (line_num_cnt != 0) { | |
203 write_line_number_table_attribute(method, line_num_cnt); | |
204 } | |
205 if (stackmap_len != 0) { | |
206 write_stackmap_table_attribute(method, stackmap_len); | |
207 } | |
208 | |
209 // FIXME: write LVT attribute | |
210 } | |
211 | |
212 // Write Exceptions attribute | |
213 // JVMSpec| Exceptions_attribute { | |
214 // JVMSpec| u2 attribute_name_index; | |
215 // JVMSpec| u4 attribute_length; | |
216 // JVMSpec| u2 number_of_exceptions; | |
217 // JVMSpec| u2 exception_index_table[number_of_exceptions]; | |
218 // JVMSpec| } | |
219 void JvmtiClassFileReconstituter::write_exceptions_attribute(constMethodHandle const_method) { | |
220 CheckedExceptionElement* checked_exceptions = const_method->checked_exceptions_start(); | |
221 int checked_exceptions_length = const_method->checked_exceptions_length(); | |
222 int size = | |
223 2 + // number_of_exceptions | |
224 2 * checked_exceptions_length; // exception_index_table | |
225 | |
226 write_attribute_name_index("Exceptions"); | |
227 write_u4(size); | |
228 write_u2(checked_exceptions_length); | |
229 for (int index = 0; index < checked_exceptions_length; index++) { | |
230 write_u2(checked_exceptions[index].class_cp_index); | |
231 } | |
232 } | |
233 | |
234 // Write SourceFile attribute | |
235 // JVMSpec| SourceFile_attribute { | |
236 // JVMSpec| u2 attribute_name_index; | |
237 // JVMSpec| u4 attribute_length; | |
238 // JVMSpec| u2 sourcefile_index; | |
239 // JVMSpec| } | |
240 void JvmtiClassFileReconstituter::write_source_file_attribute() { | |
241 assert(ikh()->source_file_name() != NULL, "caller must check"); | |
242 | |
243 write_attribute_name_index("SourceFile"); | |
244 write_u4(2); // always length 2 | |
245 write_u2(symbol_to_cpool_index(ikh()->source_file_name())); | |
246 } | |
247 | |
248 // Write SourceDebugExtension attribute | |
249 // JSR45| SourceDebugExtension_attribute { | |
250 // JSR45| u2 attribute_name_index; | |
251 // JSR45| u4 attribute_length; | |
252 // JSR45| u2 sourcefile_index; | |
253 // JSR45| } | |
254 void JvmtiClassFileReconstituter::write_source_debug_extension_attribute() { | |
255 assert(ikh()->source_debug_extension() != NULL, "caller must check"); | |
256 | |
257 write_attribute_name_index("SourceDebugExtension"); | |
258 write_u4(2); // always length 2 | |
259 write_u2(symbol_to_cpool_index(ikh()->source_debug_extension())); | |
260 } | |
261 | |
262 // Write (generic) Signature attribute | |
263 // JVMSpec| Signature_attribute { | |
264 // JVMSpec| u2 attribute_name_index; | |
265 // JVMSpec| u4 attribute_length; | |
266 // JVMSpec| u2 signature_index; | |
267 // JVMSpec| } | |
268 void JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) { | |
269 write_attribute_name_index("Signature"); | |
270 write_u4(2); // always length 2 | |
271 write_u2(generic_signature_index); | |
272 } | |
273 | |
274 // Compute the number of entries in the InnerClasses attribute | |
275 u2 JvmtiClassFileReconstituter::inner_classes_attribute_length() { | |
276 typeArrayOop inner_class_list = ikh()->inner_classes(); | |
277 return (inner_class_list == NULL) ? 0 : inner_class_list->length(); | |
278 } | |
279 | |
280 // Write an annotation attribute. The VM stores them in raw form, so all we need | |
281 // to do is add the attrubute name and fill in the length. | |
282 // JSR202| *Annotations_attribute { | |
283 // JSR202| u2 attribute_name_index; | |
284 // JSR202| u4 attribute_length; | |
285 // JSR202| ... | |
286 // JSR202| } | |
287 void JvmtiClassFileReconstituter::write_annotations_attribute(const char* attr_name, | |
288 typeArrayHandle annos) { | |
289 u4 length = annos->length(); | |
290 write_attribute_name_index(attr_name); | |
291 write_u4(length); | |
292 memcpy(writeable_address(length), annos->byte_at_addr(0), length); | |
293 } | |
294 | |
295 | |
296 // Write InnerClasses attribute | |
297 // JVMSpec| InnerClasses_attribute { | |
298 // JVMSpec| u2 attribute_name_index; | |
299 // JVMSpec| u4 attribute_length; | |
300 // JVMSpec| u2 number_of_classes; | |
301 // JVMSpec| { u2 inner_class_info_index; | |
302 // JVMSpec| u2 outer_class_info_index; | |
303 // JVMSpec| u2 inner_name_index; | |
304 // JVMSpec| u2 inner_class_access_flags; | |
305 // JVMSpec| } classes[number_of_classes]; | |
306 // JVMSpec| } | |
307 void JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) { | |
308 typeArrayOop inner_class_list = ikh()->inner_classes(); | |
309 guarantee(inner_class_list != NULL && inner_class_list->length() == length, | |
310 "caller must check"); | |
311 typeArrayHandle inner_class_list_h(thread(), inner_class_list); | |
312 assert (length % instanceKlass::inner_class_next_offset == 0, "just checking"); | |
313 u2 entry_count = length / instanceKlass::inner_class_next_offset; | |
314 u4 size = 2 + entry_count * (2+2+2+2); | |
315 | |
316 write_attribute_name_index("InnerClasses"); | |
317 write_u4(size); | |
318 write_u2(entry_count); | |
319 for (int i = 0; i < length; i += instanceKlass::inner_class_next_offset) { | |
320 write_u2(inner_class_list_h->ushort_at( | |
321 i + instanceKlass::inner_class_inner_class_info_offset)); | |
322 write_u2(inner_class_list_h->ushort_at( | |
323 i + instanceKlass::inner_class_outer_class_info_offset)); | |
324 write_u2(inner_class_list_h->ushort_at( | |
325 i + instanceKlass::inner_class_inner_name_offset)); | |
326 write_u2(inner_class_list_h->ushort_at( | |
327 i + instanceKlass::inner_class_access_flags_offset)); | |
328 } | |
329 } | |
330 | |
331 // Write Synthetic attribute | |
332 // JVMSpec| Synthetic_attribute { | |
333 // JVMSpec| u2 attribute_name_index; | |
334 // JVMSpec| u4 attribute_length; | |
335 // JVMSpec| } | |
336 void JvmtiClassFileReconstituter::write_synthetic_attribute() { | |
337 write_attribute_name_index("Synthetic"); | |
338 write_u4(0); //length always zero | |
339 } | |
340 | |
341 // Compute size of LineNumberTable | |
342 u2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) { | |
343 // The line number table is compressed so we don't know how big it is until decompressed. | |
344 // Decompression is really fast so we just do it twice. | |
345 u2 num_entries = 0; | |
346 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
347 while (stream.read_pair()) { | |
348 num_entries++; | |
349 } | |
350 return num_entries; | |
351 } | |
352 | |
353 // Write LineNumberTable attribute | |
354 // JVMSpec| LineNumberTable_attribute { | |
355 // JVMSpec| u2 attribute_name_index; | |
356 // JVMSpec| u4 attribute_length; | |
357 // JVMSpec| u2 line_number_table_length; | |
358 // JVMSpec| { u2 start_pc; | |
359 // JVMSpec| u2 line_number; | |
360 // JVMSpec| } line_number_table[line_number_table_length]; | |
361 // JVMSpec| } | |
362 void JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method, | |
363 u2 num_entries) { | |
364 | |
365 write_attribute_name_index("LineNumberTable"); | |
366 write_u4(2 + num_entries * (2 + 2)); | |
367 write_u2(num_entries); | |
368 | |
369 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); | |
370 while (stream.read_pair()) { | |
371 write_u2(stream.bci()); | |
372 write_u2(stream.line()); | |
373 } | |
374 } | |
375 | |
376 // Write stack map table attribute | |
377 // JSR-202| StackMapTable_attribute { | |
378 // JSR-202| u2 attribute_name_index; | |
379 // JSR-202| u4 attribute_length; | |
380 // JSR-202| u2 number_of_entries; | |
381 // JSR-202| stack_map_frame_entries[number_of_entries]; | |
382 // JSR-202| } | |
383 void JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method, | |
384 int stackmap_len) { | |
385 | |
386 write_attribute_name_index("StackMapTable"); | |
387 write_u4(stackmap_len); | |
388 memcpy( | |
389 writeable_address(stackmap_len), | |
390 (void*)(method->stackmap_data()->byte_at_addr(0)), | |
391 stackmap_len); | |
392 } | |
393 | |
394 // Write one method_info structure | |
395 // JVMSpec| method_info { | |
396 // JVMSpec| u2 access_flags; | |
397 // JVMSpec| u2 name_index; | |
398 // JVMSpec| u2 descriptor_index; | |
399 // JVMSpec| u2 attributes_count; | |
400 // JVMSpec| attribute_info attributes[attributes_count]; | |
401 // JVMSpec| } | |
402 void JvmtiClassFileReconstituter::write_method_info(methodHandle method) { | |
403 AccessFlags access_flags = method->access_flags(); | |
404 constMethodHandle const_method(thread(), method->constMethod()); | |
405 u2 generic_signature_index = const_method->generic_signature_index(); | |
406 typeArrayHandle anno(thread(), method->annotations()); | |
407 typeArrayHandle param_anno(thread(), method->parameter_annotations()); | |
408 typeArrayHandle default_anno(thread(), method->annotation_default()); | |
409 | |
410 write_u2(access_flags.get_flags() & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
411 write_u2(const_method->name_index()); | |
412 write_u2(const_method->signature_index()); | |
413 | |
414 // write attributes in the same order javac does, so we can test with byte for | |
415 // byte comparison | |
416 int attr_count = 0; | |
417 if (const_method->code_size() != 0) { | |
418 ++attr_count; // has Code attribute | |
419 } | |
420 if (const_method->has_checked_exceptions()) { | |
421 ++attr_count; // has Exceptions attribute | |
422 } | |
423 if (default_anno.not_null()) { | |
424 ++attr_count; // has AnnotationDefault attribute | |
425 } | |
426 // Deprecated attribute would go here | |
427 if (access_flags.is_synthetic()) { // FIXME | |
428 // ++attr_count; | |
429 } | |
430 if (generic_signature_index != 0) { | |
431 ++attr_count; | |
432 } | |
433 if (anno.not_null()) { | |
434 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
435 } | |
436 if (param_anno.not_null()) { | |
437 ++attr_count; // has RuntimeVisibleParameterAnnotations attribute | |
438 } | |
439 | |
440 write_u2(attr_count); | |
441 if (const_method->code_size() > 0) { | |
442 write_code_attribute(method); | |
443 } | |
444 if (const_method->has_checked_exceptions()) { | |
445 write_exceptions_attribute(const_method); | |
446 } | |
447 if (default_anno.not_null()) { | |
448 write_annotations_attribute("AnnotationDefault", default_anno); | |
449 } | |
450 // Deprecated attribute would go here | |
451 if (access_flags.is_synthetic()) { | |
452 // write_synthetic_attribute(); | |
453 } | |
454 if (generic_signature_index != 0) { | |
455 write_signature_attribute(generic_signature_index); | |
456 } | |
457 if (anno.not_null()) { | |
458 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
459 } | |
460 if (param_anno.not_null()) { | |
461 write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno); | |
462 } | |
463 } | |
464 | |
465 // Write the class attributes portion of ClassFile structure | |
466 // JVMSpec| u2 attributes_count; | |
467 // JVMSpec| attribute_info attributes[attributes_count]; | |
468 void JvmtiClassFileReconstituter::write_class_attributes() { | |
469 u2 inner_classes_length = inner_classes_attribute_length(); | |
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470 Symbol* generic_signature = ikh()->generic_signature(); |
0 | 471 typeArrayHandle anno(thread(), ikh()->class_annotations()); |
472 | |
473 int attr_count = 0; | |
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474 if (generic_signature != NULL) { |
0 | 475 ++attr_count; |
476 } | |
477 if (ikh()->source_file_name() != NULL) { | |
478 ++attr_count; | |
479 } | |
480 if (ikh()->source_debug_extension() != NULL) { | |
481 ++attr_count; | |
482 } | |
483 if (inner_classes_length > 0) { | |
484 ++attr_count; | |
485 } | |
486 if (anno.not_null()) { | |
487 ++attr_count; // has RuntimeVisibleAnnotations attribute | |
488 } | |
489 | |
490 write_u2(attr_count); | |
491 | |
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492 if (generic_signature != NULL) { |
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493 write_signature_attribute(symbol_to_cpool_index(generic_signature)); |
0 | 494 } |
495 if (ikh()->source_file_name() != NULL) { | |
496 write_source_file_attribute(); | |
497 } | |
498 if (ikh()->source_debug_extension() != NULL) { | |
499 write_source_debug_extension_attribute(); | |
500 } | |
501 if (inner_classes_length > 0) { | |
502 write_inner_classes_attribute(inner_classes_length); | |
503 } | |
504 if (anno.not_null()) { | |
505 write_annotations_attribute("RuntimeVisibleAnnotations", anno); | |
506 } | |
507 } | |
508 | |
509 // Write the method information portion of ClassFile structure | |
510 // JVMSpec| u2 methods_count; | |
511 // JVMSpec| method_info methods[methods_count]; | |
512 void JvmtiClassFileReconstituter::write_method_infos() { | |
513 HandleMark hm(thread()); | |
514 objArrayHandle methods(thread(), ikh()->methods()); | |
515 int num_methods = methods->length(); | |
516 | |
517 write_u2(num_methods); | |
518 if (JvmtiExport::can_maintain_original_method_order()) { | |
519 int index; | |
520 int original_index; | |
521 int* method_order = NEW_RESOURCE_ARRAY(int, num_methods); | |
522 | |
523 // invert the method order mapping | |
524 for (index = 0; index < num_methods; index++) { | |
525 original_index = ikh()->method_ordering()->int_at(index); | |
526 assert(original_index >= 0 && original_index < num_methods, | |
527 "invalid original method index"); | |
528 method_order[original_index] = index; | |
529 } | |
530 | |
531 // write in original order | |
532 for (original_index = 0; original_index < num_methods; original_index++) { | |
533 index = method_order[original_index]; | |
534 methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); | |
535 write_method_info(method); | |
536 } | |
537 } else { | |
538 // method order not preserved just dump the method infos | |
539 for (int index = 0; index < num_methods; index++) { | |
540 methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); | |
541 write_method_info(method); | |
542 } | |
543 } | |
544 } | |
545 | |
546 void JvmtiClassFileReconstituter::write_class_file_format() { | |
547 ReallocMark(); | |
548 | |
549 // JVMSpec| ClassFile { | |
550 // JVMSpec| u4 magic; | |
551 write_u4(0xCAFEBABE); | |
552 | |
553 // JVMSpec| u2 minor_version; | |
554 // JVMSpec| u2 major_version; | |
555 write_u2(ikh()->minor_version()); | |
556 u2 major = ikh()->major_version(); | |
557 write_u2(major); | |
558 | |
559 // JVMSpec| u2 constant_pool_count; | |
560 // JVMSpec| cp_info constant_pool[constant_pool_count-1]; | |
561 write_u2(cpool()->length()); | |
562 copy_cpool_bytes(writeable_address(cpool_size())); | |
563 | |
564 // JVMSpec| u2 access_flags; | |
565 write_u2(ikh()->access_flags().get_flags() & JVM_RECOGNIZED_CLASS_MODIFIERS); | |
566 | |
567 // JVMSpec| u2 this_class; | |
568 // JVMSpec| u2 super_class; | |
569 write_u2(class_symbol_to_cpool_index(ikh()->name())); | |
570 klassOop super_class = ikh()->super(); | |
571 write_u2(super_class == NULL? 0 : // zero for java.lang.Object | |
572 class_symbol_to_cpool_index(super_class->klass_part()->name())); | |
573 | |
574 // JVMSpec| u2 interfaces_count; | |
575 // JVMSpec| u2 interfaces[interfaces_count]; | |
576 objArrayHandle interfaces(thread(), ikh()->local_interfaces()); | |
577 int num_interfaces = interfaces->length(); | |
578 write_u2(num_interfaces); | |
579 for (int index = 0; index < num_interfaces; index++) { | |
580 HandleMark hm(thread()); | |
581 instanceKlassHandle iikh(thread(), klassOop(interfaces->obj_at(index))); | |
582 write_u2(class_symbol_to_cpool_index(iikh->name())); | |
583 } | |
584 | |
585 // JVMSpec| u2 fields_count; | |
586 // JVMSpec| field_info fields[fields_count]; | |
587 write_field_infos(); | |
588 | |
589 // JVMSpec| u2 methods_count; | |
590 // JVMSpec| method_info methods[methods_count]; | |
591 write_method_infos(); | |
592 | |
593 // JVMSpec| u2 attributes_count; | |
594 // JVMSpec| attribute_info attributes[attributes_count]; | |
595 // JVMSpec| } /* end ClassFile 8? | |
596 write_class_attributes(); | |
597 } | |
598 | |
599 address JvmtiClassFileReconstituter::writeable_address(size_t size) { | |
600 size_t used_size = _buffer_ptr - _buffer; | |
601 if (size + used_size >= _buffer_size) { | |
602 // compute the new buffer size: must be at least twice as big as before | |
603 // plus whatever new is being used; then convert to nice clean block boundary | |
604 size_t new_buffer_size = (size + _buffer_size*2 + 1) / initial_buffer_size | |
605 * initial_buffer_size; | |
606 | |
607 // VM goes belly-up if the memory isn't available, so cannot do OOM processing | |
608 _buffer = REALLOC_RESOURCE_ARRAY(u1, _buffer, _buffer_size, new_buffer_size); | |
609 _buffer_size = new_buffer_size; | |
610 _buffer_ptr = _buffer + used_size; | |
611 } | |
612 u1* ret_ptr = _buffer_ptr; | |
613 _buffer_ptr += size; | |
614 return ret_ptr; | |
615 } | |
616 | |
617 void JvmtiClassFileReconstituter::write_attribute_name_index(const char* name) { | |
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618 TempNewSymbol sym = SymbolTable::probe(name, (int)strlen(name)); |
0 | 619 assert(sym != NULL, "attribute name symbol not found"); |
620 u2 attr_name_index = symbol_to_cpool_index(sym); | |
621 assert(attr_name_index != 0, "attribute name symbol not in constant pool"); | |
622 write_u2(attr_name_index); | |
623 } | |
624 | |
625 void JvmtiClassFileReconstituter::write_u1(u1 x) { | |
626 *writeable_address(1) = x; | |
627 } | |
628 | |
629 void JvmtiClassFileReconstituter::write_u2(u2 x) { | |
630 Bytes::put_Java_u2(writeable_address(2), x); | |
631 } | |
632 | |
633 void JvmtiClassFileReconstituter::write_u4(u4 x) { | |
634 Bytes::put_Java_u4(writeable_address(4), x); | |
635 } | |
636 | |
637 void JvmtiClassFileReconstituter::write_u8(u8 x) { | |
638 Bytes::put_Java_u8(writeable_address(8), x); | |
639 } | |
640 | |
641 void JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh, | |
642 unsigned char* bytecodes) { | |
643 // use a BytecodeStream to iterate over the bytecodes. JVM/fast bytecodes | |
644 // and the breakpoint bytecode are converted to their original bytecodes. | |
645 | |
646 BytecodeStream bs(mh); | |
647 | |
648 unsigned char* p = bytecodes; | |
649 Bytecodes::Code code; | |
650 bool is_rewritten = instanceKlass::cast(mh->method_holder())->is_rewritten(); | |
651 | |
652 while ((code = bs.next()) >= 0) { | |
653 assert(Bytecodes::is_java_code(code), "sanity check"); | |
654 assert(code != Bytecodes::_breakpoint, "sanity check"); | |
655 | |
656 // length of bytecode (mnemonic + operands) | |
657 address bcp = bs.bcp(); | |
1565 | 658 int len = bs.instruction_size(); |
0 | 659 assert(len > 0, "length must be > 0"); |
660 | |
661 // copy the bytecodes | |
662 *p = (unsigned char) (bs.is_wide()? Bytecodes::_wide : code); | |
663 if (len > 1) { | |
664 memcpy(p+1, bcp+1, len-1); | |
665 } | |
666 | |
667 // During linking the get/put and invoke instructions are rewritten | |
668 // with an index into the constant pool cache. The original constant | |
669 // pool index must be returned to caller. Rewrite the index. | |
670 if (is_rewritten && len >= 3) { | |
671 switch (code) { | |
672 case Bytecodes::_getstatic : // fall through | |
673 case Bytecodes::_putstatic : // fall through | |
674 case Bytecodes::_getfield : // fall through | |
675 case Bytecodes::_putfield : // fall through | |
676 case Bytecodes::_invokevirtual : // fall through | |
677 case Bytecodes::_invokespecial : // fall through | |
678 case Bytecodes::_invokestatic : // fall through | |
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679 case Bytecodes::_invokedynamic : // fall through |
0 | 680 case Bytecodes::_invokeinterface : |
681 assert(len == 3 || (code == Bytecodes::_invokeinterface && len ==5), | |
682 "sanity check"); | |
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683 int cpci = Bytes::get_native_u2(bcp+1); |
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684 bool is_invokedynamic = (EnableInvokeDynamic && code == Bytecodes::_invokedynamic); |
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685 if (is_invokedynamic) |
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686 cpci = Bytes::get_native_u4(bcp+1); |
0 | 687 // cache cannot be pre-fetched since some classes won't have it yet |
688 ConstantPoolCacheEntry* entry = | |
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689 mh->constants()->cache()->main_entry_at(cpci); |
0 | 690 int i = entry->constant_pool_index(); |
691 assert(i < mh->constants()->length(), "sanity check"); | |
692 Bytes::put_Java_u2((address)(p+1), (u2)i); // java byte ordering | |
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693 if (is_invokedynamic) *(p+3) = *(p+4) = 0; |
0 | 694 break; |
695 } | |
696 } | |
697 | |
698 p += len; | |
699 } | |
700 } |