1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/classLoaderData.inline.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/debugInfo.hpp"
33 #include "code/dependencyContext.hpp"
34 #include "code/pcDesc.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "logging/log.hpp"
38 #include "logging/logStream.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/metaspaceShared.hpp"
41 #include "memory/resourceArea.hpp"
42 #include "memory/universe.hpp"
43 #include "oops/fieldStreams.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/instanceMirrorKlass.hpp"
46 #include "oops/klass.hpp"
47 #include "oops/method.inline.hpp"
48 #include "oops/objArrayOop.inline.hpp"
49 #include "oops/oop.inline.hpp"
50 #include "oops/symbol.hpp"
51 #include "oops/typeArrayOop.inline.hpp"
52 #include "prims/resolvedMethodTable.hpp"
53 #include "runtime/fieldDescriptor.hpp"
54 #include "runtime/frame.inline.hpp"
55 #include "runtime/handles.inline.hpp"
56 #include "runtime/interfaceSupport.inline.hpp"
57 #include "runtime/java.hpp"
58 #include "runtime/javaCalls.hpp"
59 #include "runtime/jniHandles.inline.hpp"
60 #include "runtime/safepoint.hpp"
61 #include "runtime/safepointVerifiers.hpp"
62 #include "runtime/thread.inline.hpp"
63 #include "runtime/vframe.inline.hpp"
64 #include "utilities/align.hpp"
65 #include "utilities/preserveException.hpp"
66
67 #if INCLUDE_JVMCI
68 #include "jvmci/jvmciJavaClasses.hpp"
69 #endif
70
71 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
72 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
73
74 #if INCLUDE_CDS
75 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
76 f->do_u4((u4*)&_##name##_offset);
77 #endif
78
79 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
80 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
81
82 InjectedField JavaClasses::_injected_fields[] = {
83 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
84 };
85
86 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
87 return _injected_fields[id].compute_offset();
88 }
89
90
91 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
92 *field_count = 0;
93
94 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
95 if (sid == vmSymbols::NO_SID) {
96 // Only well known classes can inject fields
97 return NULL;
98 }
99
100 int count = 0;
101 int start = -1;
102
103 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
104 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
105 count++; \
106 if (start == -1) start = klass##_##name##_enum; \
107 }
108 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
109 #undef LOOKUP_INJECTED_FIELD
110
111 if (start != -1) {
112 *field_count = count;
113 return _injected_fields + start;
114 }
115 return NULL;
116 }
117
118
119 // Helpful routine for computing field offsets at run time rather than hardcoding them
120 // Finds local fields only, including static fields. Static field offsets are from the
121 // beginning of the mirror.
122 static void compute_offset(int &dest_offset,
123 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
124 bool is_static = false) {
125 fieldDescriptor fd;
126 if (ik == NULL) {
127 ResourceMark rm;
128 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
129 vm_exit_during_initialization("Invalid layout of preloaded class");
130 }
131
132 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
133 ResourceMark rm;
134 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
135 name_symbol->as_C_string(), signature_symbol->as_C_string());
136 #ifndef PRODUCT
137 // Prints all fields and offsets
138 Log(class) lt;
139 LogStream ls(lt.error());
140 ik->print_on(&ls);
141 #endif //PRODUCT
142 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
143 }
144 dest_offset = fd.offset();
145 }
146
147 // Overloading to pass name as a string.
148 static void compute_offset(int& dest_offset, InstanceKlass* ik,
149 const char* name_string, Symbol* signature_symbol,
150 bool is_static = false) {
151 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
152 if (name == NULL) {
153 ResourceMark rm;
154 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
155 vm_exit_during_initialization("Invalid layout of preloaded class", ik->external_name());
156 }
157 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
158 }
159
160 // Same as above but for "optional" offsets that might not be present in certain JDK versions
161 // Old versions should be cleaned out since Hotspot only supports the current JDK, and this
162 // function should be removed.
163 static void
164 compute_optional_offset(int& dest_offset,
165 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol) {
166 fieldDescriptor fd;
167 if (ik->find_local_field(name_symbol, signature_symbol, &fd)) {
168 dest_offset = fd.offset();
169 }
170 }
171
172 int java_lang_String::value_offset = 0;
173 int java_lang_String::hash_offset = 0;
174 int java_lang_String::coder_offset = 0;
175
176 bool java_lang_String::initialized = false;
177
178 bool java_lang_String::is_instance(oop obj) {
179 return is_instance_inlined(obj);
180 }
181
182 #if INCLUDE_CDS
183 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
184 f->do_u4((u4*)&offset)
185
186 #define FIELD_SERIALIZE_OFFSET_OPTIONAL(offset, klass, name, signature) \
187 f->do_u4((u4*)&offset)
188 #endif
189
190 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
191 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
192
193 #define FIELD_COMPUTE_OFFSET_OPTIONAL(offset, klass, name, signature) \
194 compute_optional_offset(offset, klass, name, vmSymbols::signature())
195
196 #define STRING_FIELDS_DO(macro) \
197 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
198 macro(hash_offset, k, "hash", int_signature, false); \
199 macro(coder_offset, k, "coder", byte_signature, false)
200
201 void java_lang_String::compute_offsets() {
202 if (initialized) {
203 return;
204 }
205
206 InstanceKlass* k = SystemDictionary::String_klass();
207 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
208
209 initialized = true;
210 }
211
212 #if INCLUDE_CDS
213 void java_lang_String::serialize(SerializeClosure* f) {
214 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
215 f->do_u4((u4*)&initialized);
216 }
217 #endif
218
219 class CompactStringsFixup : public FieldClosure {
220 private:
221 bool _value;
222
223 public:
224 CompactStringsFixup(bool value) : _value(value) {}
225
226 void do_field(fieldDescriptor* fd) {
227 if (fd->name() == vmSymbols::compact_strings_name()) {
228 oop mirror = fd->field_holder()->java_mirror();
229 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
230 assert(mirror != NULL, "String must have mirror already");
231 mirror->bool_field_put(fd->offset(), _value);
232 }
233 }
234 };
235
236 void java_lang_String::set_compact_strings(bool value) {
237 CompactStringsFixup fix(value);
238 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
239 }
240
241 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
242 assert(initialized, "Must be initialized");
243 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
244
245 // Create the String object first, so there's a chance that the String
246 // and the char array it points to end up in the same cache line.
247 oop obj;
248 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
249
250 // Create the char array. The String object must be handlized here
251 // because GC can happen as a result of the allocation attempt.
252 Handle h_obj(THREAD, obj);
253 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
254 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
255
256 // Point the String at the char array
257 obj = h_obj();
258 set_value(obj, buffer);
259 // No need to zero the offset, allocation zero'ed the entire String object
260 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
261 return h_obj;
262 }
263
264 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
265 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
266 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
267 typeArrayOop buffer = value(h_obj());
268 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
269 if (is_latin1) {
270 for (int index = 0; index < length; index++) {
271 buffer->byte_at_put(index, (jbyte)unicode[index]);
272 }
273 } else {
274 for (int index = 0; index < length; index++) {
275 buffer->char_at_put(index, unicode[index]);
276 }
277 }
278
279 #ifdef ASSERT
280 {
281 ResourceMark rm;
282 char* expected = UNICODE::as_utf8(unicode, length);
283 char* actual = as_utf8_string(h_obj());
284 if (strcmp(expected, actual) != 0) {
285 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
286 ShouldNotReachHere();
287 }
288 }
289 #endif
290
291 return h_obj;
292 }
293
294 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
295 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
296 return h_obj();
297 }
298
299 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
300 if (utf8_str == NULL) {
301 return Handle();
302 }
303 bool has_multibyte, is_latin1;
304 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
305 if (!CompactStrings) {
306 has_multibyte = true;
307 is_latin1 = false;
308 }
309
310 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
311 if (length > 0) {
312 if (!has_multibyte) {
313 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
314 } else if (is_latin1) {
315 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
316 } else {
317 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
318 }
319 }
320
321 #ifdef ASSERT
322 // This check is too strict because the input string is not necessarily valid UTF8.
323 // For example, it may be created with arbitrary content via jni_NewStringUTF.
324 /*
325 {
326 ResourceMark rm;
327 const char* expected = utf8_str;
328 char* actual = as_utf8_string(h_obj());
329 if (strcmp(expected, actual) != 0) {
330 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
331 ShouldNotReachHere();
332 }
333 }
334 */
335 #endif
336
337 return h_obj;
338 }
339
340 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
341 Handle h_obj = create_from_str(utf8_str, CHECK_0);
342 return h_obj();
343 }
344
345 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
346 const char* utf8_str = (char*)symbol->bytes();
347 int utf8_len = symbol->utf8_length();
348
349 bool has_multibyte, is_latin1;
350 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
351 if (!CompactStrings) {
352 has_multibyte = true;
353 is_latin1 = false;
354 }
355
356 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
357 if (length > 0) {
358 if (!has_multibyte) {
359 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
360 } else if (is_latin1) {
361 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
362 } else {
363 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
364 }
365 }
366
367 #ifdef ASSERT
368 {
369 ResourceMark rm;
370 const char* expected = symbol->as_utf8();
371 char* actual = as_utf8_string(h_obj());
372 if (strncmp(expected, actual, utf8_len) != 0) {
373 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
374 ShouldNotReachHere();
375 }
376 }
377 #endif
378
379 return h_obj;
380 }
381
382 // Converts a C string to a Java String based on current encoding
383 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
384 assert(str != NULL, "bad arguments");
385
386 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
387 static to_java_string_fn_t _to_java_string_fn = NULL;
388
389 if (_to_java_string_fn == NULL) {
390 void *lib_handle = os::native_java_library();
391 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
392 if (_to_java_string_fn == NULL) {
393 fatal("NewStringPlatform missing");
394 }
395 }
396
397 jstring js = NULL;
398 { JavaThread* thread = (JavaThread*)THREAD;
399 assert(thread->is_Java_thread(), "must be java thread");
400 HandleMark hm(thread);
401 ThreadToNativeFromVM ttn(thread);
402 js = (_to_java_string_fn)(thread->jni_environment(), str);
403 }
404 return Handle(THREAD, JNIHandles::resolve(js));
405 }
406
407 // Converts a Java String to a native C string that can be used for
408 // native OS calls.
409 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
410 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
411 static to_platform_string_fn_t _to_platform_string_fn = NULL;
412
413 if (_to_platform_string_fn == NULL) {
414 void *lib_handle = os::native_java_library();
415 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
416 if (_to_platform_string_fn == NULL) {
417 fatal("GetStringPlatformChars missing");
418 }
419 }
420
421 char *native_platform_string;
422 { JavaThread* thread = (JavaThread*)THREAD;
423 assert(thread->is_Java_thread(), "must be java thread");
424 JNIEnv *env = thread->jni_environment();
425 jstring js = (jstring) JNIHandles::make_local(env, java_string());
426 bool is_copy;
427 HandleMark hm(thread);
428 ThreadToNativeFromVM ttn(thread);
429 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
430 assert(is_copy == JNI_TRUE, "is_copy value changed");
431 JNIHandles::destroy_local(js);
432 }
433 return native_platform_string;
434 }
435
436 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
437 oop obj = java_string();
438 // Typical usage is to convert all '/' to '.' in string.
439 typeArrayOop value = java_lang_String::value(obj);
440 int length = java_lang_String::length(obj);
441 bool is_latin1 = java_lang_String::is_latin1(obj);
442
443 // First check if any from_char exist
444 int index; // Declared outside, used later
445 for (index = 0; index < length; index++) {
446 jchar c = !is_latin1 ? value->char_at(index) :
447 ((jchar) value->byte_at(index)) & 0xff;
448 if (c == from_char) {
449 break;
450 }
451 }
452 if (index == length) {
453 // No from_char, so do not copy.
454 return java_string;
455 }
456
457 // Check if result string will be latin1
458 bool to_is_latin1 = false;
459
460 // Replacement char must be latin1
461 if (CompactStrings && UNICODE::is_latin1(to_char)) {
462 if (is_latin1) {
463 // Source string is latin1 as well
464 to_is_latin1 = true;
465 } else if (!UNICODE::is_latin1(from_char)) {
466 // We are replacing an UTF16 char. Scan string to
467 // check if result can be latin1 encoded.
468 to_is_latin1 = true;
469 for (index = 0; index < length; index++) {
470 jchar c = value->char_at(index);
471 if (c != from_char && !UNICODE::is_latin1(c)) {
472 to_is_latin1 = false;
473 break;
474 }
475 }
476 }
477 }
478
479 // Create new UNICODE (or byte) buffer. Must handlize value because GC
480 // may happen during String and char array creation.
481 typeArrayHandle h_value(THREAD, value);
482 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
483 typeArrayOop from_buffer = h_value();
484 typeArrayOop to_buffer = java_lang_String::value(string());
485
486 // Copy contents
487 for (index = 0; index < length; index++) {
488 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
489 ((jchar) from_buffer->byte_at(index)) & 0xff;
490 if (c == from_char) {
491 c = to_char;
492 }
493 if (!to_is_latin1) {
494 to_buffer->char_at_put(index, c);
495 } else {
496 to_buffer->byte_at_put(index, (jbyte) c);
497 }
498 }
499 return string;
500 }
501
502 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
503 typeArrayOop value = java_lang_String::value(java_string);
504 length = java_lang_String::length(java_string);
505 bool is_latin1 = java_lang_String::is_latin1(java_string);
506
507 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
508 if (result != NULL) {
509 if (!is_latin1) {
510 for (int index = 0; index < length; index++) {
511 result[index] = value->char_at(index);
512 }
513 } else {
514 for (int index = 0; index < length; index++) {
515 result[index] = ((jchar) value->byte_at(index)) & 0xff;
516 }
517 }
518 } else {
519 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
520 }
521 return result;
522 }
523
524 unsigned int java_lang_String::hash_code(oop java_string) {
525 int length = java_lang_String::length(java_string);
526 // Zero length string will hash to zero with String.hashCode() function.
527 if (length == 0) return 0;
528
529 typeArrayOop value = java_lang_String::value(java_string);
530 bool is_latin1 = java_lang_String::is_latin1(java_string);
531
532 if (is_latin1) {
533 return java_lang_String::hash_code(value->byte_at_addr(0), length);
534 } else {
535 return java_lang_String::hash_code(value->char_at_addr(0), length);
536 }
537 }
538
539 char* java_lang_String::as_quoted_ascii(oop java_string) {
540 typeArrayOop value = java_lang_String::value(java_string);
541 int length = java_lang_String::length(java_string);
542 bool is_latin1 = java_lang_String::is_latin1(java_string);
543
544 if (length == 0) return NULL;
545
546 char* result;
547 int result_length;
548 if (!is_latin1) {
549 jchar* base = value->char_at_addr(0);
550 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
551 result = NEW_RESOURCE_ARRAY(char, result_length);
552 UNICODE::as_quoted_ascii(base, length, result, result_length);
553 } else {
554 jbyte* base = value->byte_at_addr(0);
555 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
556 result = NEW_RESOURCE_ARRAY(char, result_length);
557 UNICODE::as_quoted_ascii(base, length, result, result_length);
558 }
559 assert(result_length >= length + 1, "must not be shorter");
560 assert(result_length == (int)strlen(result) + 1, "must match");
561 return result;
562 }
563
564 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
565 typeArrayOop value = java_lang_String::value(java_string);
566 int length = java_lang_String::length(java_string);
567 bool is_latin1 = java_lang_String::is_latin1(java_string);
568 if (!is_latin1) {
569 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
570 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
571 return sym;
572 } else {
573 ResourceMark rm;
574 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
575 const char* base = UNICODE::as_utf8(position, length);
576 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
577 return sym;
578 }
579 }
580
581 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
582 typeArrayOop value = java_lang_String::value(java_string);
583 int length = java_lang_String::length(java_string);
584 bool is_latin1 = java_lang_String::is_latin1(java_string);
585 if (!is_latin1) {
586 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
587 return SymbolTable::probe_unicode(base, length);
588 } else {
589 ResourceMark rm;
590 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
591 const char* base = UNICODE::as_utf8(position, length);
592 return SymbolTable::probe(base, length);
593 }
594 }
595
596 int java_lang_String::utf8_length(oop java_string) {
597 typeArrayOop value = java_lang_String::value(java_string);
598 int length = java_lang_String::length(java_string);
599 bool is_latin1 = java_lang_String::is_latin1(java_string);
600 if (length == 0) {
601 return 0;
602 }
603 if (!is_latin1) {
604 return UNICODE::utf8_length(value->char_at_addr(0), length);
605 } else {
606 return UNICODE::utf8_length(value->byte_at_addr(0), length);
607 }
608 }
609
610 char* java_lang_String::as_utf8_string(oop java_string) {
611 typeArrayOop value = java_lang_String::value(java_string);
612 int length = java_lang_String::length(java_string);
613 bool is_latin1 = java_lang_String::is_latin1(java_string);
614 if (!is_latin1) {
615 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
616 return UNICODE::as_utf8(position, length);
617 } else {
618 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
619 return UNICODE::as_utf8(position, length);
620 }
621 }
622
623 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
624 typeArrayOop value = java_lang_String::value(java_string);
625 int length = java_lang_String::length(java_string);
626 bool is_latin1 = java_lang_String::is_latin1(java_string);
627 if (!is_latin1) {
628 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
629 return UNICODE::as_utf8(position, length, buf, buflen);
630 } else {
631 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
632 return UNICODE::as_utf8(position, length, buf, buflen);
633 }
634 }
635
636 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
637 typeArrayOop value = java_lang_String::value(java_string);
638 int length = java_lang_String::length(java_string);
639 assert(start + len <= length, "just checking");
640 bool is_latin1 = java_lang_String::is_latin1(java_string);
641 if (!is_latin1) {
642 jchar* position = value->char_at_addr(start);
643 return UNICODE::as_utf8(position, len);
644 } else {
645 jbyte* position = value->byte_at_addr(start);
646 return UNICODE::as_utf8(position, len);
647 }
648 }
649
650 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
651 typeArrayOop value = java_lang_String::value(java_string);
652 int length = java_lang_String::length(java_string);
653 assert(start + len <= length, "just checking");
654 bool is_latin1 = java_lang_String::is_latin1(java_string);
655 if (!is_latin1) {
656 jchar* position = value->char_at_addr(start);
657 return UNICODE::as_utf8(position, len, buf, buflen);
658 } else {
659 jbyte* position = value->byte_at_addr(start);
660 return UNICODE::as_utf8(position, len, buf, buflen);
661 }
662 }
663
664 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
665 assert(java_string->klass() == SystemDictionary::String_klass(),
666 "must be java_string");
667 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
668 int length = java_lang_String::length(java_string);
669 if (length != len) {
670 return false;
671 }
672 bool is_latin1 = java_lang_String::is_latin1(java_string);
673 if (!is_latin1) {
674 for (int i = 0; i < len; i++) {
675 if (value->char_at(i) != chars[i]) {
676 return false;
677 }
678 }
679 } else {
680 for (int i = 0; i < len; i++) {
681 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
682 return false;
683 }
684 }
685 }
686 return true;
687 }
688
689 bool java_lang_String::equals(oop str1, oop str2) {
690 assert(str1->klass() == SystemDictionary::String_klass(),
691 "must be java String");
692 assert(str2->klass() == SystemDictionary::String_klass(),
693 "must be java String");
694 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
695 int length1 = java_lang_String::length(str1);
696 bool is_latin1 = java_lang_String::is_latin1(str1);
697 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
698 int length2 = java_lang_String::length(str2);
699 bool is_latin2 = java_lang_String::is_latin1(str2);
700
701 if ((length1 != length2) || (is_latin1 != is_latin2)) {
702 // Strings of different size or with different
703 // coders are never equal.
704 return false;
705 }
706 int blength1 = value1->length();
707 for (int i = 0; i < blength1; i++) {
708 if (value1->byte_at(i) != value2->byte_at(i)) {
709 return false;
710 }
711 }
712 return true;
713 }
714
715 void java_lang_String::print(oop java_string, outputStream* st) {
716 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
717 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
718
719 if (value == NULL) {
720 // This can happen if, e.g., printing a String
721 // object before its initializer has been called
722 st->print("NULL");
723 return;
724 }
725
726 int length = java_lang_String::length(java_string);
727 bool is_latin1 = java_lang_String::is_latin1(java_string);
728
729 st->print("\"");
730 for (int index = 0; index < length; index++) {
731 st->print("%c", (!is_latin1) ? value->char_at(index) :
732 ((jchar) value->byte_at(index)) & 0xff );
733 }
734 st->print("\"");
735 }
736
737
738 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
739 assert(mirror.not_null() && fd->is_static(), "just checking");
740 if (fd->has_initial_value()) {
741 BasicType t = fd->field_type();
742 switch (t) {
743 case T_BYTE:
744 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
745 break;
746 case T_BOOLEAN:
747 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
748 break;
749 case T_CHAR:
750 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
751 break;
752 case T_SHORT:
753 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
754 break;
755 case T_INT:
756 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
757 break;
758 case T_FLOAT:
759 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
760 break;
761 case T_DOUBLE:
762 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
763 break;
764 case T_LONG:
765 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
766 break;
767 case T_OBJECT:
768 {
769 assert(fd->signature() == vmSymbols::string_signature(),
770 "just checking");
771 if (DumpSharedSpaces && MetaspaceShared::is_archive_object(mirror())) {
772 // Archive the String field and update the pointer.
773 oop s = mirror()->obj_field(fd->offset());
774 oop archived_s = StringTable::create_archived_string(s, CHECK);
775 mirror()->obj_field_put(fd->offset(), archived_s);
776 } else {
777 oop string = fd->string_initial_value(CHECK);
778 mirror()->obj_field_put(fd->offset(), string);
779 }
780 }
781 break;
782 default:
783 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
784 "Illegal ConstantValue attribute in class file");
785 }
786 }
787 }
788
789
790 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
791 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
792
793 // If the offset was read from the shared archive, it was fixed up already
794 if (!k->is_shared()) {
795 if (k->is_instance_klass()) {
796 // During bootstrap, java.lang.Class wasn't loaded so static field
797 // offsets were computed without the size added it. Go back and
798 // update all the static field offsets to included the size.
799 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
800 if (fs.access_flags().is_static()) {
801 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
802 fs.set_offset(real_offset);
803 }
804 }
805 }
806 }
807
808 if (k->is_shared() && k->has_raw_archived_mirror()) {
809 if (MetaspaceShared::open_archive_heap_region_mapped()) {
810 oop m = k->archived_java_mirror();
811 assert(m != NULL, "archived mirror is NULL");
812 assert(MetaspaceShared::is_archive_object(m), "must be archived mirror object");
813 Handle m_h(THREAD, m);
814 // restore_archived_mirror() clears the klass' _has_raw_archived_mirror flag
815 restore_archived_mirror(k, m_h, Handle(), Handle(), Handle(), CHECK);
816 return;
817 } else {
818 k->set_java_mirror_handle(NULL);
819 k->clear_has_raw_archived_mirror();
820 }
821 }
822 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
823 }
824
825 void java_lang_Class::initialize_mirror_fields(Klass* k,
826 Handle mirror,
827 Handle protection_domain,
828 TRAPS) {
829 // Allocate a simple java object for a lock.
830 // This needs to be a java object because during class initialization
831 // it can be held across a java call.
832 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
833 set_init_lock(mirror(), r);
834
835 // Set protection domain also
836 set_protection_domain(mirror(), protection_domain());
837
838 // Initialize static fields
839 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
840 }
841
842 // Set the java.lang.Module module field in the java_lang_Class mirror
843 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
844 if (module.is_null()) {
845 // During startup, the module may be NULL only if java.base has not been defined yet.
846 // Put the class on the fixup_module_list to patch later when the java.lang.Module
847 // for java.base is known.
848 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization");
849
850 bool javabase_was_defined = false;
851 {
852 MutexLocker m1(Module_lock, THREAD);
853 // Keep list of classes needing java.base module fixup
854 if (!ModuleEntryTable::javabase_defined()) {
855 assert(k->java_mirror() != NULL, "Class's mirror is null");
856 k->class_loader_data()->inc_keep_alive();
857 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
858 fixup_module_field_list()->push(k);
859 } else {
860 javabase_was_defined = true;
861 }
862 }
863
864 // If java.base was already defined then patch this particular class with java.base.
865 if (javabase_was_defined) {
866 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
867 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
868 "Setting class module field, " JAVA_BASE_NAME " should be defined");
869 Handle javabase_handle(THREAD, javabase_entry->module());
870 set_module(mirror(), javabase_handle());
871 }
872 } else {
873 assert(Universe::is_module_initialized() ||
874 (ModuleEntryTable::javabase_defined() &&
875 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
876 "Incorrect java.lang.Module specification while creating mirror");
877 set_module(mirror(), module());
878 }
879 }
880
881 // Statically allocate fixup lists because they always get created.
882 void java_lang_Class::allocate_fixup_lists() {
883 GrowableArray<Klass*>* mirror_list =
884 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
885 set_fixup_mirror_list(mirror_list);
886
887 GrowableArray<Klass*>* module_list =
888 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
889 set_fixup_module_field_list(module_list);
890 }
891
892 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
893 Handle module, Handle protection_domain, TRAPS) {
894 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
895 assert(k->java_mirror() == NULL, "should only assign mirror once");
896
897 // Use this moment of initialization to cache modifier_flags also,
898 // to support Class.getModifiers(). Instance classes recalculate
899 // the cached flags after the class file is parsed, but before the
900 // class is put into the system dictionary.
901 int computed_modifiers = k->compute_modifier_flags(CHECK);
902 k->set_modifier_flags(computed_modifiers);
903 // Class_klass has to be loaded because it is used to allocate
904 // the mirror.
905 if (SystemDictionary::Class_klass_loaded()) {
906 // Allocate mirror (java.lang.Class instance)
907 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
908 Handle mirror(THREAD, mirror_oop);
909 Handle comp_mirror;
910
911 // Setup indirection from mirror->klass
912 java_lang_Class::set_klass(mirror(), k);
913
914 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
915 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
916
917 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
918
919 // It might also have a component mirror. This mirror must already exist.
920 if (k->is_array_klass()) {
921 if (k->is_typeArray_klass()) {
922 BasicType type = TypeArrayKlass::cast(k)->element_type();
923 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
924 } else {
925 assert(k->is_objArray_klass(), "Must be");
926 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
927 assert(element_klass != NULL, "Must have an element klass");
928 comp_mirror = Handle(THREAD, element_klass->java_mirror());
929 }
930 assert(comp_mirror() != NULL, "must have a mirror");
931
932 // Two-way link between the array klass and its component mirror:
933 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
934 set_component_mirror(mirror(), comp_mirror());
935 // See below for ordering dependencies between field array_klass in component mirror
936 // and java_mirror in this klass.
937 } else {
938 assert(k->is_instance_klass(), "Must be");
939
940 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
941 if (HAS_PENDING_EXCEPTION) {
942 // If any of the fields throws an exception like OOM remove the klass field
943 // from the mirror so GC doesn't follow it after the klass has been deallocated.
944 // This mirror looks like a primitive type, which logically it is because it
945 // it represents no class.
946 java_lang_Class::set_klass(mirror(), NULL);
947 return;
948 }
949 }
950
951 // set the classLoader field in the java_lang_Class instance
952 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
953 set_class_loader(mirror(), class_loader());
954
955 // Setup indirection from klass->mirror
956 // after any exceptions can happen during allocations.
957 k->set_java_mirror(mirror);
958
959 // Set the module field in the java_lang_Class instance. This must be done
960 // after the mirror is set.
961 set_mirror_module_field(k, mirror, module, THREAD);
962
963 if (comp_mirror() != NULL) {
964 // Set after k->java_mirror() is published, because compiled code running
965 // concurrently doesn't expect a k to have a null java_mirror.
966 release_set_array_klass(comp_mirror(), k);
967 }
968 } else {
969 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
970 fixup_mirror_list()->push(k);
971 }
972 }
973
974 #if INCLUDE_CDS_JAVA_HEAP
975 // Clears mirror fields. Static final fields with initial values are reloaded
976 // from constant pool. The object identity hash is in the object header and is
977 // not affected.
978 class ResetMirrorField: public FieldClosure {
979 private:
980 Handle _m;
981
982 public:
983 ResetMirrorField(Handle mirror) : _m(mirror) {}
984
985 void do_field(fieldDescriptor* fd) {
986 assert(DumpSharedSpaces, "dump time only");
987 assert(_m.not_null(), "Mirror cannot be NULL");
988
989 if (fd->is_static() && fd->has_initial_value()) {
990 initialize_static_field(fd, _m, Thread::current());
991 return;
992 }
993
994 BasicType ft = fd->field_type();
995 switch (ft) {
996 case T_BYTE:
997 _m()->byte_field_put(fd->offset(), 0);
998 break;
999 case T_CHAR:
1000 _m()->char_field_put(fd->offset(), 0);
1001 break;
1002 case T_DOUBLE:
1003 _m()->double_field_put(fd->offset(), 0);
1004 break;
1005 case T_FLOAT:
1006 _m()->float_field_put(fd->offset(), 0);
1007 break;
1008 case T_INT:
1009 _m()->int_field_put(fd->offset(), 0);
1010 break;
1011 case T_LONG:
1012 _m()->long_field_put(fd->offset(), 0);
1013 break;
1014 case T_SHORT:
1015 _m()->short_field_put(fd->offset(), 0);
1016 break;
1017 case T_BOOLEAN:
1018 _m()->bool_field_put(fd->offset(), false);
1019 break;
1020 case T_ARRAY:
1021 case T_OBJECT: {
1022 // It might be useful to cache the String field, but
1023 // for now just clear out any reference field
1024 oop o = _m()->obj_field(fd->offset());
1025 _m()->obj_field_put(fd->offset(), NULL);
1026 break;
1027 }
1028 default:
1029 ShouldNotReachHere();
1030 break;
1031 }
1032 }
1033 };
1034
1035 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1036 assert(MetaspaceShared::is_heap_object_archiving_allowed(),
1037 "MetaspaceShared::is_heap_object_archiving_allowed() must be true");
1038
1039 for (int t = 0; t <= T_VOID; t++) {
1040 oop m = Universe::_mirrors[t];
1041 if (m != NULL) {
1042 // Update the field at _array_klass_offset to point to the relocated array klass.
1043 oop archived_m = MetaspaceShared::archive_heap_object(m, THREAD);
1044 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1045 assert(ak != NULL || t == T_VOID, "should not be NULL");
1046 if (ak != NULL) {
1047 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1048 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1049 }
1050
1051 // Clear the fields. Just to be safe
1052 Klass *k = m->klass();
1053 Handle archived_mirror_h(THREAD, archived_m);
1054 ResetMirrorField reset(archived_mirror_h);
1055 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1056
1057 log_trace(cds, mirror)("Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1058 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1059
1060 Universe::_mirrors[t] = archived_m;
1061 }
1062 }
1063
1064 assert(Universe::_mirrors[T_INT] != NULL &&
1065 Universe::_mirrors[T_FLOAT] != NULL &&
1066 Universe::_mirrors[T_DOUBLE] != NULL &&
1067 Universe::_mirrors[T_BYTE] != NULL &&
1068 Universe::_mirrors[T_BOOLEAN] != NULL &&
1069 Universe::_mirrors[T_CHAR] != NULL &&
1070 Universe::_mirrors[T_LONG] != NULL &&
1071 Universe::_mirrors[T_SHORT] != NULL &&
1072 Universe::_mirrors[T_VOID] != NULL, "sanity");
1073
1074 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1075 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1076 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1077 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1078 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1079 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1080 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1081 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1082 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1083 }
1084
1085 //
1086 // After the mirror object is successfully archived, the archived
1087 // klass is set with _has_archived_raw_mirror flag.
1088 //
1089 // The _has_archived_raw_mirror flag is cleared at runtime when the
1090 // archived mirror is restored. If archived java heap data cannot
1091 // be used at runtime, new mirror object is created for the shared
1092 // class. The _has_archived_raw_mirror is cleared also during the process.
1093 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1094 assert(MetaspaceShared::is_heap_object_archiving_allowed(),
1095 "MetaspaceShared::is_heap_object_archiving_allowed() must be true");
1096
1097 // Mirror is already archived
1098 if (k->has_raw_archived_mirror()) {
1099 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1100 return k->archived_java_mirror_raw();
1101 }
1102
1103 // No mirror
1104 oop mirror = k->java_mirror();
1105 if (mirror == NULL) {
1106 return NULL;
1107 }
1108
1109 if (k->is_instance_klass()) {
1110 InstanceKlass *ik = InstanceKlass::cast(k);
1111 assert(ik->signers() == NULL && !k->has_signer_and_not_archived(),
1112 "class with signer cannot be supported");
1113
1114 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1115 ik->is_shared_app_class())) {
1116 // Archiving mirror for classes from non-builtin loaders is not
1117 // supported. Clear the _java_mirror within the archived class.
1118 k->set_java_mirror_handle(NULL);
1119 return NULL;
1120 }
1121 }
1122
1123 // Now start archiving the mirror object
1124 oop archived_mirror = MetaspaceShared::archive_heap_object(mirror, THREAD);
1125 if (archived_mirror == NULL) {
1126 return NULL;
1127 }
1128
1129 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1130 if (archived_mirror == NULL) {
1131 return NULL;
1132 }
1133
1134 k->set_archived_java_mirror_raw(archived_mirror);
1135
1136 k->set_has_raw_archived_mirror();
1137
1138 ResourceMark rm;
1139 log_trace(cds, mirror)("Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1140 k->external_name(), p2i(mirror), p2i(archived_mirror));
1141
1142 return archived_mirror;
1143 }
1144
1145 // The process is based on create_mirror().
1146 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1147 oop archived_mirror,
1148 Thread *THREAD) {
1149 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1150 // to archived metadata and objects below.
1151 Klass *c = archived_mirror->klass();
1152 Handle archived_mirror_h(THREAD, archived_mirror);
1153 ResetMirrorField reset(archived_mirror_h);
1154 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1155
1156 if (k->is_array_klass()) {
1157 oop archived_comp_mirror;
1158 if (k->is_typeArray_klass()) {
1159 // The primitive type mirrors are already archived. Get the archived mirror.
1160 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1161 archived_comp_mirror = MetaspaceShared::find_archived_heap_object(comp_mirror);
1162 assert(archived_comp_mirror != NULL, "Must be");
1163 } else {
1164 assert(k->is_objArray_klass(), "Must be");
1165 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1166 assert(element_klass != NULL, "Must have an element klass");
1167 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1168 if (archived_comp_mirror == NULL) {
1169 return NULL;
1170 }
1171 }
1172 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1173 } else {
1174 assert(k->is_instance_klass(), "Must be");
1175
1176 // Reset local static fields in the mirror
1177 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1178
1179 java_lang_Class:set_init_lock(archived_mirror, NULL);
1180
1181 set_protection_domain(archived_mirror, NULL);
1182 }
1183
1184 // clear class loader and mirror_module_field
1185 set_class_loader(archived_mirror, NULL);
1186 set_module(archived_mirror, NULL);
1187
1188 // The archived mirror's field at _klass_offset is still pointing to the original
1189 // klass. Updated the field in the archived mirror to point to the relocated
1190 // klass in the archive.
1191 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1192 log_debug(cds, mirror)("Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1193 p2i(as_Klass(mirror)), p2i(reloc_k));
1194 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1195
1196 // The field at _array_klass_offset is pointing to the original one dimension
1197 // higher array klass if exists. Relocate the pointer.
1198 Klass *arr = array_klass_acquire(mirror);
1199 if (arr != NULL) {
1200 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1201 log_debug(cds, mirror)("Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1202 p2i(arr), p2i(reloc_arr));
1203 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1204 }
1205 return archived_mirror;
1206 }
1207
1208 // After the archived mirror object is restored, the shared klass'
1209 // _has_raw_archived_mirror flag is cleared
1210 void java_lang_Class::restore_archived_mirror(Klass *k, Handle mirror,
1211 Handle class_loader, Handle module,
1212 Handle protection_domain, TRAPS) {
1213
1214 // The java.lang.Class field offsets were archived and reloaded from archive.
1215 // No need to put classes on the fixup_mirror_list before java.lang.Class
1216 // is loaded.
1217
1218 if (!k->is_array_klass()) {
1219 // - local static final fields with initial values were initialized at dump time
1220
1221 // create the init_lock
1222 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
1223 set_init_lock(mirror(), r);
1224
1225 if (protection_domain.not_null()) {
1226 set_protection_domain(mirror(), protection_domain());
1227 }
1228 }
1229
1230 assert(class_loader() == k->class_loader(), "should be same");
1231 if (class_loader.not_null()) {
1232 set_class_loader(mirror(), class_loader());
1233 }
1234
1235 k->set_java_mirror(mirror);
1236 k->clear_has_raw_archived_mirror();
1237
1238 set_mirror_module_field(k, mirror, module, THREAD);
1239
1240 ResourceMark rm;
1241 log_trace(cds, mirror)("Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1242 }
1243 #endif // INCLUDE_CDS_JAVA_HEAP
1244
1245 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1246 assert(_module_offset != 0, "must have been computed already");
1247 java_lang_Class::set_module(k->java_mirror(), module());
1248 }
1249
1250 int java_lang_Class::oop_size(oop java_class) {
1251 assert(_oop_size_offset != 0, "must be set");
1252 int size = java_class->int_field(_oop_size_offset);
1253 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1254 return size;
1255 }
1256
1257 void java_lang_Class::set_oop_size(oop java_class, int size) {
1258 assert(_oop_size_offset != 0, "must be set");
1259 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1260 java_class->int_field_put(_oop_size_offset, size);
1261 }
1262
1263 int java_lang_Class::static_oop_field_count(oop java_class) {
1264 assert(_static_oop_field_count_offset != 0, "must be set");
1265 return java_class->int_field(_static_oop_field_count_offset);
1266 }
1267 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1268 assert(_static_oop_field_count_offset != 0, "must be set");
1269 java_class->int_field_put(_static_oop_field_count_offset, size);
1270 }
1271
1272 oop java_lang_Class::protection_domain(oop java_class) {
1273 assert(_protection_domain_offset != 0, "must be set");
1274 return java_class->obj_field(_protection_domain_offset);
1275 }
1276 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1277 assert(_protection_domain_offset != 0, "must be set");
1278 java_class->obj_field_put(_protection_domain_offset, pd);
1279 }
1280
1281 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1282 assert(_component_mirror_offset != 0, "must be set");
1283 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1284 }
1285 oop java_lang_Class::component_mirror(oop java_class) {
1286 assert(_component_mirror_offset != 0, "must be set");
1287 return java_class->obj_field(_component_mirror_offset);
1288 }
1289
1290 oop java_lang_Class::init_lock(oop java_class) {
1291 assert(_init_lock_offset != 0, "must be set");
1292 return java_class->obj_field(_init_lock_offset);
1293 }
1294 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1295 assert(_init_lock_offset != 0, "must be set");
1296 java_class->obj_field_put(_init_lock_offset, init_lock);
1297 }
1298
1299 objArrayOop java_lang_Class::signers(oop java_class) {
1300 assert(_signers_offset != 0, "must be set");
1301 return (objArrayOop)java_class->obj_field(_signers_offset);
1302 }
1303 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1304 assert(_signers_offset != 0, "must be set");
1305 java_class->obj_field_put(_signers_offset, (oop)signers);
1306 }
1307
1308 // Accessor for field containing exception thrown during class initialization.
1309 oop java_lang_Class::exceptionThrownDuringClinit(oop java_class) {
1310 assert(_exceptionThrownDuringClinit_offset != 0, "must be set");
1311 return java_class->obj_field(_exceptionThrownDuringClinit_offset);
1312 }
1313
1314 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1315 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1316 if (_class_loader_offset != 0) {
1317 java_class->obj_field_put(_class_loader_offset, loader);
1318 }
1319 }
1320
1321 oop java_lang_Class::class_loader(oop java_class) {
1322 assert(_class_loader_offset != 0, "must be set");
1323 return java_class->obj_field(_class_loader_offset);
1324 }
1325
1326 oop java_lang_Class::module(oop java_class) {
1327 assert(_module_offset != 0, "must be set");
1328 return java_class->obj_field(_module_offset);
1329 }
1330
1331 void java_lang_Class::set_module(oop java_class, oop module) {
1332 assert(_module_offset != 0, "must be set");
1333 java_class->obj_field_put(_module_offset, module);
1334 }
1335
1336 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1337 // This should be improved by adding a field at the Java level or by
1338 // introducing a new VM klass (see comment in ClassFileParser)
1339 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1340 if (type != T_VOID) {
1341 Klass* aklass = Universe::typeArrayKlassObj(type);
1342 assert(aklass != NULL, "correct bootstrap");
1343 release_set_array_klass(java_class, aklass);
1344 }
1345 #ifdef ASSERT
1346 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1347 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1348 #endif
1349 return java_class;
1350 }
1351
1352
1353 Klass* java_lang_Class::as_Klass(oop java_class) {
1354 //%note memory_2
1355 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1356 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1357 assert(k == NULL || k->is_klass(), "type check");
1358 return k;
1359 }
1360
1361
1362 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1363 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1364 java_class->metadata_field_put(_klass_offset, klass);
1365 }
1366
1367
1368 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1369 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1370 Symbol* name = NULL;
1371 bool is_instance = false;
1372 if (is_primitive(java_class)) {
1373 name = vmSymbols::type_signature(primitive_type(java_class));
1374 } else {
1375 Klass* k = as_Klass(java_class);
1376 is_instance = k->is_instance_klass();
1377 name = k->name();
1378 }
1379 if (name == NULL) {
1380 st->print("<null>");
1381 return;
1382 }
1383 if (is_instance) st->print("L");
1384 st->write((char*) name->base(), (int) name->utf8_length());
1385 if (is_instance) st->print(";");
1386 }
1387
1388 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1389 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1390 Symbol* name;
1391 if (is_primitive(java_class)) {
1392 name = vmSymbols::type_signature(primitive_type(java_class));
1393 // Because this can create a new symbol, the caller has to decrement
1394 // the refcount, so make adjustment here and below for symbols returned
1395 // that are not created or incremented due to a successful lookup.
1396 name->increment_refcount();
1397 } else {
1398 Klass* k = as_Klass(java_class);
1399 if (!k->is_instance_klass()) {
1400 name = k->name();
1401 name->increment_refcount();
1402 } else {
1403 ResourceMark rm;
1404 const char* sigstr = k->signature_name();
1405 int siglen = (int) strlen(sigstr);
1406 if (!intern_if_not_found) {
1407 name = SymbolTable::probe(sigstr, siglen);
1408 } else {
1409 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1410 }
1411 }
1412 }
1413 return name;
1414 }
1415
1416 // Returns the Java name for this Java mirror (Resource allocated)
1417 // See Klass::external_name().
1418 // For primitive type Java mirrors, its type name is returned.
1419 const char* java_lang_Class::as_external_name(oop java_class) {
1420 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1421 const char* name = NULL;
1422 if (is_primitive(java_class)) {
1423 name = type2name(primitive_type(java_class));
1424 } else {
1425 name = as_Klass(java_class)->external_name();
1426 }
1427 if (name == NULL) {
1428 name = "<null>";
1429 }
1430 return name;
1431 }
1432
1433 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1434 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1435 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1436 return k;
1437 }
1438
1439
1440 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1441 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1442 java_class->release_metadata_field_put(_array_klass_offset, klass);
1443 }
1444
1445
1446 bool java_lang_Class::is_primitive(oop java_class) {
1447 // should assert:
1448 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1449 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1450
1451 #ifdef ASSERT
1452 if (is_primitive) {
1453 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1454 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1455 "Should be either the T_VOID primitive or a java primitive");
1456 }
1457 #endif
1458
1459 return is_primitive;
1460 }
1461
1462
1463 BasicType java_lang_Class::primitive_type(oop java_class) {
1464 assert(java_lang_Class::is_primitive(java_class), "just checking");
1465 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1466 BasicType type = T_VOID;
1467 if (ak != NULL) {
1468 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1469 type = ArrayKlass::cast(ak)->element_type();
1470 } else {
1471 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1472 }
1473 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1474 return type;
1475 }
1476
1477 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1478 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1479 if (is_primitive(java_class)) {
1480 if (reference_klass != NULL)
1481 (*reference_klass) = NULL;
1482 return primitive_type(java_class);
1483 } else {
1484 if (reference_klass != NULL)
1485 (*reference_klass) = as_Klass(java_class);
1486 return T_OBJECT;
1487 }
1488 }
1489
1490
1491 oop java_lang_Class::primitive_mirror(BasicType t) {
1492 oop mirror = Universe::java_mirror(t);
1493 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1494 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1495 return mirror;
1496 }
1497
1498 bool java_lang_Class::offsets_computed = false;
1499 int java_lang_Class::classRedefinedCount_offset = -1;
1500 int java_lang_Class::_exceptionThrownDuringClinit_offset = -1;
1501
1502 #define CLASS_FIELDS_DO(macro) \
1503 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1504 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1505 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1506 macro(_module_offset, k, "module", module_signature, false)
1507
1508 void java_lang_Class::compute_offsets() {
1509 if (offsets_computed) {
1510 return;
1511 }
1512
1513 offsets_computed = true;
1514
1515 InstanceKlass* k = SystemDictionary::Class_klass();
1516 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1517
1518 compute_offset(_exceptionThrownDuringClinit_offset, k,
1519 vmSymbols::exceptionThrownDuringClinit_name(), vmSymbols::throwable_signature());
1520
1521 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1522 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1523 // GC treats them the same.
1524 _init_lock_offset = _component_mirror_offset;
1525
1526 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1527 }
1528
1529 #if INCLUDE_CDS
1530 void java_lang_Class::serialize(SerializeClosure* f) {
1531 f->do_u4((u4*)&offsets_computed);
1532 f->do_u4((u4*)&_init_lock_offset);
1533
1534 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1535
1536 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1537 }
1538 #endif
1539
1540 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1541 if (classRedefinedCount_offset == -1) {
1542 // If we don't have an offset for it then just return -1 as a marker.
1543 return -1;
1544 }
1545
1546 return the_class_mirror->int_field(classRedefinedCount_offset);
1547 }
1548
1549 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1550 if (classRedefinedCount_offset == -1) {
1551 // If we don't have an offset for it then nothing to set.
1552 return;
1553 }
1554
1555 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1556 }
1557
1558
1559 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1560 // platform thread structure, and a eetop offset which was used for thread
1561 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1562 // merged, so in the HotSpot VM we just use the eetop field for the thread
1563 // instead of the privateInfo_offset.
1564 //
1565 // Note: The stackSize field is only present starting in 1.4.
1566
1567 int java_lang_Thread::_name_offset = 0;
1568 int java_lang_Thread::_group_offset = 0;
1569 int java_lang_Thread::_contextClassLoader_offset = 0;
1570 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1571 int java_lang_Thread::_priority_offset = 0;
1572 int java_lang_Thread::_eetop_offset = 0;
1573 int java_lang_Thread::_daemon_offset = 0;
1574 int java_lang_Thread::_stillborn_offset = 0;
1575 int java_lang_Thread::_stackSize_offset = 0;
1576 int java_lang_Thread::_tid_offset = 0;
1577 int java_lang_Thread::_thread_status_offset = 0;
1578 int java_lang_Thread::_park_blocker_offset = 0;
1579 int java_lang_Thread::_park_event_offset = 0 ;
1580
1581 #define THREAD_FIELDS_DO(macro) \
1582 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1583 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1584 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1585 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1586 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1587 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1588 macro(_eetop_offset, k, "eetop", long_signature, false); \
1589 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1590 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1591 macro(_tid_offset, k, "tid", long_signature, false); \
1592 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1593 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1594 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false)
1595
1596 void java_lang_Thread::compute_offsets() {
1597 assert(_group_offset == 0, "offsets should be initialized only once");
1598
1599 InstanceKlass* k = SystemDictionary::Thread_klass();
1600 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1601 }
1602
1603 #if INCLUDE_CDS
1604 void java_lang_Thread::serialize(SerializeClosure* f) {
1605 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1606 }
1607 #endif
1608
1609 JavaThread* java_lang_Thread::thread(oop java_thread) {
1610 return (JavaThread*)java_thread->address_field(_eetop_offset);
1611 }
1612
1613
1614 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1615 java_thread->address_field_put(_eetop_offset, (address)thread);
1616 }
1617
1618
1619 oop java_lang_Thread::name(oop java_thread) {
1620 return java_thread->obj_field(_name_offset);
1621 }
1622
1623
1624 void java_lang_Thread::set_name(oop java_thread, oop name) {
1625 java_thread->obj_field_put(_name_offset, name);
1626 }
1627
1628
1629 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1630 return (ThreadPriority)java_thread->int_field(_priority_offset);
1631 }
1632
1633
1634 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1635 java_thread->int_field_put(_priority_offset, priority);
1636 }
1637
1638
1639 oop java_lang_Thread::threadGroup(oop java_thread) {
1640 return java_thread->obj_field(_group_offset);
1641 }
1642
1643
1644 bool java_lang_Thread::is_stillborn(oop java_thread) {
1645 return java_thread->bool_field(_stillborn_offset) != 0;
1646 }
1647
1648
1649 // We never have reason to turn the stillborn bit off
1650 void java_lang_Thread::set_stillborn(oop java_thread) {
1651 java_thread->bool_field_put(_stillborn_offset, true);
1652 }
1653
1654
1655 bool java_lang_Thread::is_alive(oop java_thread) {
1656 JavaThread* thr = java_lang_Thread::thread(java_thread);
1657 return (thr != NULL);
1658 }
1659
1660
1661 bool java_lang_Thread::is_daemon(oop java_thread) {
1662 return java_thread->bool_field(_daemon_offset) != 0;
1663 }
1664
1665
1666 void java_lang_Thread::set_daemon(oop java_thread) {
1667 java_thread->bool_field_put(_daemon_offset, true);
1668 }
1669
1670 oop java_lang_Thread::context_class_loader(oop java_thread) {
1671 return java_thread->obj_field(_contextClassLoader_offset);
1672 }
1673
1674 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1675 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1676 }
1677
1678
1679 jlong java_lang_Thread::stackSize(oop java_thread) {
1680 if (_stackSize_offset > 0) {
1681 return java_thread->long_field(_stackSize_offset);
1682 } else {
1683 return 0;
1684 }
1685 }
1686
1687 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1688 void java_lang_Thread::set_thread_status(oop java_thread,
1689 java_lang_Thread::ThreadStatus status) {
1690 // The threadStatus is only present starting in 1.5
1691 if (_thread_status_offset > 0) {
1692 java_thread->int_field_put(_thread_status_offset, status);
1693 }
1694 }
1695
1696 // Read thread status value from threadStatus field in java.lang.Thread java class.
1697 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1698 // Make sure the caller is operating on behalf of the VM or is
1699 // running VM code (state == _thread_in_vm).
1700 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1701 JavaThread::current()->thread_state() == _thread_in_vm,
1702 "Java Thread is not running in vm");
1703 // The threadStatus is only present starting in 1.5
1704 if (_thread_status_offset > 0) {
1705 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1706 } else {
1707 // All we can easily figure out is if it is alive, but that is
1708 // enough info for a valid unknown status.
1709 // These aren't restricted to valid set ThreadStatus values, so
1710 // use JVMTI values and cast.
1711 JavaThread* thr = java_lang_Thread::thread(java_thread);
1712 if (thr == NULL) {
1713 // the thread hasn't run yet or is in the process of exiting
1714 return NEW;
1715 }
1716 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1717 }
1718 }
1719
1720
1721 jlong java_lang_Thread::thread_id(oop java_thread) {
1722 // The thread ID field is only present starting in 1.5
1723 if (_tid_offset > 0) {
1724 return java_thread->long_field(_tid_offset);
1725 } else {
1726 return 0;
1727 }
1728 }
1729
1730 oop java_lang_Thread::park_blocker(oop java_thread) {
1731 assert(JDK_Version::current().supports_thread_park_blocker() &&
1732 _park_blocker_offset != 0, "Must support parkBlocker field");
1733
1734 if (_park_blocker_offset > 0) {
1735 return java_thread->obj_field(_park_blocker_offset);
1736 }
1737
1738 return NULL;
1739 }
1740
1741 jlong java_lang_Thread::park_event(oop java_thread) {
1742 if (_park_event_offset > 0) {
1743 return java_thread->long_field(_park_event_offset);
1744 }
1745 return 0;
1746 }
1747
1748 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1749 if (_park_event_offset > 0) {
1750 java_thread->long_field_put(_park_event_offset, ptr);
1751 return true;
1752 }
1753 return false;
1754 }
1755
1756
1757 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1758 assert(_thread_status_offset != 0, "Must have thread status");
1759 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1760 switch (status) {
1761 case NEW : return "NEW";
1762 case RUNNABLE : return "RUNNABLE";
1763 case SLEEPING : return "TIMED_WAITING (sleeping)";
1764 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1765 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1766 case PARKED : return "WAITING (parking)";
1767 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1768 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1769 case TERMINATED : return "TERMINATED";
1770 default : return "UNKNOWN";
1771 };
1772 }
1773 int java_lang_ThreadGroup::_parent_offset = 0;
1774 int java_lang_ThreadGroup::_name_offset = 0;
1775 int java_lang_ThreadGroup::_threads_offset = 0;
1776 int java_lang_ThreadGroup::_groups_offset = 0;
1777 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1778 int java_lang_ThreadGroup::_destroyed_offset = 0;
1779 int java_lang_ThreadGroup::_daemon_offset = 0;
1780 int java_lang_ThreadGroup::_nthreads_offset = 0;
1781 int java_lang_ThreadGroup::_ngroups_offset = 0;
1782
1783 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1784 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1785 return java_thread_group->obj_field(_parent_offset);
1786 }
1787
1788 // ("name as oop" accessor is not necessary)
1789
1790 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1791 oop name = java_thread_group->obj_field(_name_offset);
1792 // ThreadGroup.name can be null
1793 if (name != NULL) {
1794 return java_lang_String::as_utf8_string(name);
1795 }
1796 return NULL;
1797 }
1798
1799 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1800 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1801 return java_thread_group->int_field(_nthreads_offset);
1802 }
1803
1804 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1805 oop threads = java_thread_group->obj_field(_threads_offset);
1806 assert(threads != NULL, "threadgroups should have threads");
1807 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1808 return objArrayOop(threads);
1809 }
1810
1811 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1812 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1813 return java_thread_group->int_field(_ngroups_offset);
1814 }
1815
1816 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1817 oop groups = java_thread_group->obj_field(_groups_offset);
1818 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1819 return objArrayOop(groups);
1820 }
1821
1822 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1823 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1824 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1825 }
1826
1827 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1828 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1829 return java_thread_group->bool_field(_destroyed_offset) != 0;
1830 }
1831
1832 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1833 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1834 return java_thread_group->bool_field(_daemon_offset) != 0;
1835 }
1836
1837 #define THREADGROUP_FIELDS_DO(macro) \
1838 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1839 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1840 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1841 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1842 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1843 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1844 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1845 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1846 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1847
1848 void java_lang_ThreadGroup::compute_offsets() {
1849 assert(_parent_offset == 0, "offsets should be initialized only once");
1850
1851 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1852 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1853 }
1854
1855 #if INCLUDE_CDS
1856 void java_lang_ThreadGroup::serialize(SerializeClosure* f) {
1857 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1858 }
1859 #endif
1860
1861 #define THROWABLE_FIELDS_DO(macro) \
1862 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1863 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1864 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1865 macro(depth_offset, k, "depth", int_signature, false); \
1866 macro(cause_offset, k, "cause", throwable_signature, false); \
1867 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1868
1869 void java_lang_Throwable::compute_offsets() {
1870 InstanceKlass* k = SystemDictionary::Throwable_klass();
1871 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1872 }
1873
1874 #if INCLUDE_CDS
1875 void java_lang_Throwable::serialize(SerializeClosure* f) {
1876 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1877 }
1878 #endif
1879
1880 oop java_lang_Throwable::unassigned_stacktrace() {
1881 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1882 oop base = ik->static_field_base_raw();
1883 return base->obj_field(static_unassigned_stacktrace_offset);
1884 }
1885
1886 oop java_lang_Throwable::backtrace(oop throwable) {
1887 return throwable->obj_field_acquire(backtrace_offset);
1888 }
1889
1890
1891 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1892 throwable->release_obj_field_put(backtrace_offset, value);
1893 }
1894
1895 int java_lang_Throwable::depth(oop throwable) {
1896 return throwable->int_field(depth_offset);
1897 }
1898
1899 void java_lang_Throwable::set_depth(oop throwable, int value) {
1900 throwable->int_field_put(depth_offset, value);
1901 }
1902
1903 oop java_lang_Throwable::message(oop throwable) {
1904 return throwable->obj_field(detailMessage_offset);
1905 }
1906
1907
1908 // Return Symbol for detailed_message or NULL
1909 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1910 PRESERVE_EXCEPTION_MARK; // Keep original exception
1911 oop detailed_message = java_lang_Throwable::message(throwable);
1912 if (detailed_message != NULL) {
1913 return java_lang_String::as_symbol(detailed_message, THREAD);
1914 }
1915 return NULL;
1916 }
1917
1918 void java_lang_Throwable::set_message(oop throwable, oop value) {
1919 throwable->obj_field_put(detailMessage_offset, value);
1920 }
1921
1922 void java_lang_Throwable::set_cause(oop throwable, oop cause) {
1923 assert(cause_offset != 0, "not yet initialized");
1924 throwable->obj_field_put(cause_offset, cause);
1925 }
1926
1927 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1928 throwable->obj_field_put(stackTrace_offset, st_element_array);
1929 }
1930
1931 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1932 set_stacktrace(throwable, NULL);
1933 }
1934
1935
1936 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1937 ResourceMark rm;
1938 Klass* k = throwable->klass();
1939 assert(k != NULL, "just checking");
1940 st->print("%s", k->external_name());
1941 oop msg = message(throwable);
1942 if (msg != NULL) {
1943 st->print(": %s", java_lang_String::as_utf8_string(msg));
1944 }
1945 }
1946
1947 // After this many redefines, the stack trace is unreliable.
1948 const int MAX_VERSION = USHRT_MAX;
1949
1950 static inline bool version_matches(Method* method, int version) {
1951 assert(version < MAX_VERSION, "version is too big");
1952 return method != NULL && (method->constants()->version() == version);
1953 }
1954
1955
1956 // This class provides a simple wrapper over the internal structure of
1957 // exception backtrace to insulate users of the backtrace from needing
1958 // to know what it looks like.
1959 class BacktraceBuilder: public StackObj {
1960 friend class BacktraceIterator;
1961 private:
1962 Handle _backtrace;
1963 objArrayOop _head;
1964 typeArrayOop _methods;
1965 typeArrayOop _bcis;
1966 objArrayOop _mirrors;
1967 typeArrayOop _names; // needed to insulate method name against redefinition
1968 int _index;
1969 NoSafepointVerifier _nsv;
1970
1971 enum {
1972 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1973 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1974 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1975 trace_names_offset = java_lang_Throwable::trace_names_offset,
1976 trace_next_offset = java_lang_Throwable::trace_next_offset,
1977 trace_size = java_lang_Throwable::trace_size,
1978 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1979 };
1980
1981 // get info out of chunks
1982 static typeArrayOop get_methods(objArrayHandle chunk) {
1983 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1984 assert(methods != NULL, "method array should be initialized in backtrace");
1985 return methods;
1986 }
1987 static typeArrayOop get_bcis(objArrayHandle chunk) {
1988 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1989 assert(bcis != NULL, "bci array should be initialized in backtrace");
1990 return bcis;
1991 }
1992 static objArrayOop get_mirrors(objArrayHandle chunk) {
1993 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1994 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1995 return mirrors;
1996 }
1997 static typeArrayOop get_names(objArrayHandle chunk) {
1998 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
1999 assert(names != NULL, "names array should be initialized in backtrace");
2000 return names;
2001 }
2002
2003 public:
2004
2005 // constructor for new backtrace
2006 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) {
2007 expand(CHECK);
2008 _backtrace = Handle(THREAD, _head);
2009 _index = 0;
2010 }
2011
2012 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2013 _methods = get_methods(backtrace);
2014 _bcis = get_bcis(backtrace);
2015 _mirrors = get_mirrors(backtrace);
2016 _names = get_names(backtrace);
2017 assert(_methods->length() == _bcis->length() &&
2018 _methods->length() == _mirrors->length() &&
2019 _mirrors->length() == _names->length(),
2020 "method and source information arrays should match");
2021
2022 // head is the preallocated backtrace
2023 _head = backtrace();
2024 _backtrace = Handle(thread, _head);
2025 _index = 0;
2026 }
2027
2028 void expand(TRAPS) {
2029 objArrayHandle old_head(THREAD, _head);
2030 PauseNoSafepointVerifier pnsv(&_nsv);
2031
2032 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2033 objArrayHandle new_head(THREAD, head);
2034
2035 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2036 typeArrayHandle new_methods(THREAD, methods);
2037
2038 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2039 typeArrayHandle new_bcis(THREAD, bcis);
2040
2041 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2042 objArrayHandle new_mirrors(THREAD, mirrors);
2043
2044 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2045 typeArrayHandle new_names(THREAD, names);
2046
2047 if (!old_head.is_null()) {
2048 old_head->obj_at_put(trace_next_offset, new_head());
2049 }
2050 new_head->obj_at_put(trace_methods_offset, new_methods());
2051 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2052 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2053 new_head->obj_at_put(trace_names_offset, new_names());
2054
2055 _head = new_head();
2056 _methods = new_methods();
2057 _bcis = new_bcis();
2058 _mirrors = new_mirrors();
2059 _names = new_names();
2060 _index = 0;
2061 }
2062
2063 oop backtrace() {
2064 return _backtrace();
2065 }
2066
2067 inline void push(Method* method, int bci, TRAPS) {
2068 // Smear the -1 bci to 0 since the array only holds unsigned
2069 // shorts. The later line number lookup would just smear the -1
2070 // to a 0 even if it could be recorded.
2071 if (bci == SynchronizationEntryBCI) bci = 0;
2072
2073 if (_index >= trace_chunk_size) {
2074 methodHandle mhandle(THREAD, method);
2075 expand(CHECK);
2076 method = mhandle();
2077 }
2078
2079 _methods->ushort_at_put(_index, method->orig_method_idnum());
2080 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2081
2082 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2083 // klass owning the symbols alive so their refcounts aren't decremented.
2084 Symbol* name = method->name();
2085 _names->symbol_at_put(_index, name);
2086
2087 // We need to save the mirrors in the backtrace to keep the class
2088 // from being unloaded while we still have this stack trace.
2089 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2090 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2091 _index++;
2092 }
2093
2094 };
2095
2096 struct BacktraceElement : public StackObj {
2097 int _method_id;
2098 int _bci;
2099 int _version;
2100 Symbol* _name;
2101 Handle _mirror;
2102 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2103 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {}
2104 };
2105
2106 class BacktraceIterator : public StackObj {
2107 int _index;
2108 objArrayHandle _result;
2109 objArrayHandle _mirrors;
2110 typeArrayHandle _methods;
2111 typeArrayHandle _bcis;
2112 typeArrayHandle _names;
2113
2114 void init(objArrayHandle result, Thread* thread) {
2115 // Get method id, bci, version and mirror from chunk
2116 _result = result;
2117 if (_result.not_null()) {
2118 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2119 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2120 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2121 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2122 _index = 0;
2123 }
2124 }
2125 public:
2126 BacktraceIterator(objArrayHandle result, Thread* thread) {
2127 init(result, thread);
2128 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2129 }
2130
2131 BacktraceElement next(Thread* thread) {
2132 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2133 _methods->ushort_at(_index),
2134 Backtrace::version_at(_bcis->int_at(_index)),
2135 Backtrace::bci_at(_bcis->int_at(_index)),
2136 _names->symbol_at(_index));
2137 _index++;
2138
2139 if (_index >= java_lang_Throwable::trace_chunk_size) {
2140 int next_offset = java_lang_Throwable::trace_next_offset;
2141 // Get next chunk
2142 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2143 init(result, thread);
2144 }
2145 return e;
2146 }
2147
2148 bool repeat() {
2149 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2150 }
2151 };
2152
2153
2154 // Print stack trace element to resource allocated buffer
2155 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2156 int version, int bci, Symbol* name) {
2157 ResourceMark rm;
2158
2159 // Get strings and string lengths
2160 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2161 const char* klass_name = holder->external_name();
2162 int buf_len = (int)strlen(klass_name);
2163
2164 char* method_name = name->as_C_string();
2165 buf_len += (int)strlen(method_name);
2166
2167 char* source_file_name = NULL;
2168 Symbol* source = Backtrace::get_source_file_name(holder, version);
2169 if (source != NULL) {
2170 source_file_name = source->as_C_string();
2171 buf_len += (int)strlen(source_file_name);
2172 }
2173
2174 char *module_name = NULL, *module_version = NULL;
2175 ModuleEntry* module = holder->module();
2176 if (module->is_named()) {
2177 module_name = module->name()->as_C_string();
2178 buf_len += (int)strlen(module_name);
2179 if (module->version() != NULL) {
2180 module_version = module->version()->as_C_string();
2181 buf_len += (int)strlen(module_version);
2182 }
2183 }
2184
2185 // Allocate temporary buffer with extra space for formatting and line number
2186 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2187
2188 // Print stack trace line in buffer
2189 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2190
2191 // Print module information
2192 if (module_name != NULL) {
2193 if (module_version != NULL) {
2194 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2195 } else {
2196 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2197 }
2198 }
2199
2200 // The method can be NULL if the requested class version is gone
2201 Method* method = holder->method_with_orig_idnum(method_id, version);
2202 if (!version_matches(method, version)) {
2203 strcat(buf, "Redefined)");
2204 } else {
2205 int line_number = Backtrace::get_line_number(method, bci);
2206 if (line_number == -2) {
2207 strcat(buf, "Native Method)");
2208 } else {
2209 if (source_file_name != NULL && (line_number != -1)) {
2210 // Sourcename and linenumber
2211 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2212 } else if (source_file_name != NULL) {
2213 // Just sourcename
2214 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2215 } else {
2216 // Neither sourcename nor linenumber
2217 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2218 }
2219 CompiledMethod* nm = method->code();
2220 if (WizardMode && nm != NULL) {
2221 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2222 }
2223 }
2224 }
2225
2226 st->print_cr("%s", buf);
2227 }
2228
2229 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2230 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2231 int method_id = method->orig_method_idnum();
2232 int version = method->constants()->version();
2233 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2234 }
2235
2236 /**
2237 * Print the throwable message and its stack trace plus all causes by walking the
2238 * cause chain. The output looks the same as of Throwable.printStackTrace().
2239 */
2240 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2241 // First, print the message.
2242 print(throwable(), st);
2243 st->cr();
2244
2245 // Now print the stack trace.
2246 Thread* THREAD = Thread::current();
2247 while (throwable.not_null()) {
2248 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2249 if (result.is_null()) {
2250 st->print_raw_cr("\t<<no stack trace available>>");
2251 return;
2252 }
2253 BacktraceIterator iter(result, THREAD);
2254
2255 while (iter.repeat()) {
2256 BacktraceElement bte = iter.next(THREAD);
2257 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2258 }
2259 {
2260 // Call getCause() which doesn't necessarily return the _cause field.
2261 EXCEPTION_MARK;
2262 JavaValue cause(T_OBJECT);
2263 JavaCalls::call_virtual(&cause,
2264 throwable,
2265 throwable->klass(),
2266 vmSymbols::getCause_name(),
2267 vmSymbols::void_throwable_signature(),
2268 THREAD);
2269 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2270 if (HAS_PENDING_EXCEPTION) {
2271 CLEAR_PENDING_EXCEPTION;
2272 throwable = Handle();
2273 } else {
2274 throwable = Handle(THREAD, (oop) cause.get_jobject());
2275 if (throwable.not_null()) {
2276 st->print("Caused by: ");
2277 print(throwable(), st);
2278 st->cr();
2279 }
2280 }
2281 }
2282 }
2283 }
2284
2285 /**
2286 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2287 */
2288 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2289 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2290 JavaValue result(T_VOID);
2291 JavaCalls::call_virtual(&result,
2292 throwable,
2293 SystemDictionary::Throwable_klass(),
2294 vmSymbols::printStackTrace_name(),
2295 vmSymbols::void_method_signature(),
2296 THREAD);
2297 }
2298
2299 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2300 if (!StackTraceInThrowable) return;
2301 ResourceMark rm(THREAD);
2302
2303 // Start out by clearing the backtrace for this object, in case the VM
2304 // runs out of memory while allocating the stack trace
2305 set_backtrace(throwable(), NULL);
2306 // Clear lazily constructed Java level stacktrace if refilling occurs
2307 // This is unnecessary in 1.7+ but harmless
2308 clear_stacktrace(throwable());
2309
2310 int max_depth = MaxJavaStackTraceDepth;
2311 JavaThread* thread = (JavaThread*)THREAD;
2312
2313 BacktraceBuilder bt(CHECK);
2314
2315 // If there is no Java frame just return the method that was being called
2316 // with bci 0
2317 if (!thread->has_last_Java_frame()) {
2318 if (max_depth >= 1 && method() != NULL) {
2319 bt.push(method(), 0, CHECK);
2320 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2321 set_depth(throwable(), 1);
2322 set_backtrace(throwable(), bt.backtrace());
2323 }
2324 return;
2325 }
2326
2327 // Instead of using vframe directly, this version of fill_in_stack_trace
2328 // basically handles everything by hand. This significantly improved the
2329 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2330 // See bug 6333838 for more details.
2331 // The "ASSERT" here is to verify this method generates the exactly same stack
2332 // trace as utilizing vframe.
2333 #ifdef ASSERT
2334 vframeStream st(thread);
2335 methodHandle st_method(THREAD, st.method());
2336 #endif
2337 int total_count = 0;
2338 RegisterMap map(thread, false);
2339 int decode_offset = 0;
2340 CompiledMethod* nm = NULL;
2341 bool skip_fillInStackTrace_check = false;
2342 bool skip_throwableInit_check = false;
2343 bool skip_hidden = !ShowHiddenFrames;
2344
2345 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2346 Method* method = NULL;
2347 int bci = 0;
2348
2349 // Compiled java method case.
2350 if (decode_offset != 0) {
2351 DebugInfoReadStream stream(nm, decode_offset);
2352 decode_offset = stream.read_int();
2353 method = (Method*)nm->metadata_at(stream.read_int());
2354 bci = stream.read_bci();
2355 } else {
2356 if (fr.is_first_frame()) break;
2357 address pc = fr.pc();
2358 if (fr.is_interpreted_frame()) {
2359 address bcp = fr.interpreter_frame_bcp();
2360 method = fr.interpreter_frame_method();
2361 bci = method->bci_from(bcp);
2362 fr = fr.sender(&map);
2363 } else {
2364 CodeBlob* cb = fr.cb();
2365 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2366 // but non nmethod
2367 fr = fr.sender(&map);
2368 if (cb == NULL || !cb->is_compiled()) {
2369 continue;
2370 }
2371 nm = cb->as_compiled_method();
2372 if (nm->method()->is_native()) {
2373 method = nm->method();
2374 bci = 0;
2375 } else {
2376 PcDesc* pd = nm->pc_desc_at(pc);
2377 decode_offset = pd->scope_decode_offset();
2378 // if decode_offset is not equal to 0, it will execute the
2379 // "compiled java method case" at the beginning of the loop.
2380 continue;
2381 }
2382 }
2383 }
2384 #ifdef ASSERT
2385 assert(st_method() == method && st.bci() == bci,
2386 "Wrong stack trace");
2387 st.next();
2388 // vframeStream::method isn't GC-safe so store off a copy
2389 // of the Method* in case we GC.
2390 if (!st.at_end()) {
2391 st_method = st.method();
2392 }
2393 #endif
2394
2395 // the format of the stacktrace will be:
2396 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2397 // - 0 or more <init> methods for the exception class (skipped)
2398 // - rest of the stack
2399
2400 if (!skip_fillInStackTrace_check) {
2401 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2402 throwable->is_a(method->method_holder())) {
2403 continue;
2404 }
2405 else {
2406 skip_fillInStackTrace_check = true; // gone past them all
2407 }
2408 }
2409 if (!skip_throwableInit_check) {
2410 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2411
2412 // skip <init> methods of the exception class and superclasses
2413 // This is simlar to classic VM.
2414 if (method->name() == vmSymbols::object_initializer_name() &&
2415 throwable->is_a(method->method_holder())) {
2416 continue;
2417 } else {
2418 // there are none or we've seen them all - either way stop checking
2419 skip_throwableInit_check = true;
2420 }
2421 }
2422 if (method->is_hidden()) {
2423 if (skip_hidden) continue;
2424 }
2425 bt.push(method, bci, CHECK);
2426 total_count++;
2427 }
2428
2429 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2430
2431 // Put completed stack trace into throwable object
2432 set_backtrace(throwable(), bt.backtrace());
2433 set_depth(throwable(), total_count);
2434 }
2435
2436 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2437 // No-op if stack trace is disabled
2438 if (!StackTraceInThrowable) {
2439 return;
2440 }
2441
2442 // Disable stack traces for some preallocated out of memory errors
2443 if (!Universe::should_fill_in_stack_trace(throwable)) {
2444 return;
2445 }
2446
2447 PRESERVE_EXCEPTION_MARK;
2448
2449 JavaThread* thread = JavaThread::active();
2450 fill_in_stack_trace(throwable, method, thread);
2451 // ignore exceptions thrown during stack trace filling
2452 CLEAR_PENDING_EXCEPTION;
2453 }
2454
2455 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2456 // Allocate stack trace - backtrace is created but not filled in
2457
2458 // No-op if stack trace is disabled
2459 if (!StackTraceInThrowable) return;
2460 BacktraceBuilder bt(CHECK); // creates a backtrace
2461 set_backtrace(throwable(), bt.backtrace());
2462 }
2463
2464
2465 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2466 // Fill in stack trace into preallocated backtrace (no GC)
2467
2468 // No-op if stack trace is disabled
2469 if (!StackTraceInThrowable) return;
2470
2471 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2472
2473 JavaThread* THREAD = JavaThread::current();
2474
2475 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2476 assert(backtrace.not_null(), "backtrace should have been preallocated");
2477
2478 ResourceMark rm(THREAD);
2479 vframeStream st(THREAD);
2480
2481 BacktraceBuilder bt(THREAD, backtrace);
2482
2483 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2484 // methods as preallocated errors aren't created by "java" code.
2485
2486 // fill in as much stack trace as possible
2487 int chunk_count = 0;
2488 for (;!st.at_end(); st.next()) {
2489 bt.push(st.method(), st.bci(), CHECK);
2490 chunk_count++;
2491
2492 // Bail-out for deep stacks
2493 if (chunk_count >= trace_chunk_size) break;
2494 }
2495 set_depth(throwable(), chunk_count);
2496 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2497
2498 // We support the Throwable immutability protocol defined for Java 7.
2499 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2500 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2501 }
2502
2503 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2504 objArrayHandle stack_trace_array_h, TRAPS) {
2505
2506 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2507 THROW(vmSymbols::java_lang_NullPointerException());
2508 }
2509
2510 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2511
2512 if (stack_trace_array_h->length() != depth(throwable())) {
2513 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2514 }
2515
2516 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2517 BacktraceIterator iter(result, THREAD);
2518
2519 int index = 0;
2520 while (iter.repeat()) {
2521 BacktraceElement bte = iter.next(THREAD);
2522
2523 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2524
2525 if (stack_trace_element.is_null()) {
2526 THROW(vmSymbols::java_lang_NullPointerException());
2527 }
2528
2529 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2530 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2531
2532 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2533 method,
2534 bte._version,
2535 bte._bci,
2536 bte._name, CHECK);
2537 }
2538 }
2539
2540 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2541 // Allocate java.lang.StackTraceElement instance
2542 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2543 assert(k != NULL, "must be loaded in 1.4+");
2544 if (k->should_be_initialized()) {
2545 k->initialize(CHECK_0);
2546 }
2547
2548 Handle element = k->allocate_instance_handle(CHECK_0);
2549
2550 int version = method->constants()->version();
2551 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2552 return element();
2553 }
2554
2555 void java_lang_StackTraceElement::fill_in(Handle element,
2556 InstanceKlass* holder, const methodHandle& method,
2557 int version, int bci, Symbol* name, TRAPS) {
2558 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2559
2560 // Fill in class name
2561 ResourceMark rm(THREAD);
2562 const char* str = holder->external_name();
2563 oop classname = StringTable::intern((char*) str, CHECK);
2564 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2565 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror());
2566
2567 oop loader = holder->class_loader();
2568 if (loader != NULL) {
2569 oop loader_name = java_lang_ClassLoader::name(loader);
2570 if (loader_name != NULL)
2571 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2572 }
2573
2574 // Fill in method name
2575 oop methodname = StringTable::intern(name, CHECK);
2576 java_lang_StackTraceElement::set_methodName(element(), methodname);
2577
2578 // Fill in module name and version
2579 ModuleEntry* module = holder->module();
2580 if (module->is_named()) {
2581 oop module_name = StringTable::intern(module->name(), CHECK);
2582 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2583 oop module_version;
2584 if (module->version() != NULL) {
2585 module_version = StringTable::intern(module->version(), CHECK);
2586 } else {
2587 module_version = NULL;
2588 }
2589 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2590 }
2591
2592 if (method() == NULL || !version_matches(method(), version)) {
2593 // The method was redefined, accurate line number information isn't available
2594 java_lang_StackTraceElement::set_fileName(element(), NULL);
2595 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2596 } else {
2597 // Fill in source file name and line number.
2598 Symbol* source = Backtrace::get_source_file_name(holder, version);
2599 if (ShowHiddenFrames && source == NULL)
2600 source = vmSymbols::unknown_class_name();
2601 oop filename = StringTable::intern(source, CHECK);
2602 java_lang_StackTraceElement::set_fileName(element(), filename);
2603
2604 int line_number = Backtrace::get_line_number(method, bci);
2605 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2606 }
2607 }
2608
2609 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2610 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2611 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2612 // we should expand MemberName::name when Throwable uses StackTrace
2613 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2614 return method;
2615 }
2616
2617 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2618 // set Method* or mid/cpref
2619 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2620 InstanceKlass* ik = method->method_holder();
2621 CallInfo info(method(), ik, CHECK);
2622 MethodHandles::init_method_MemberName(mname, info);
2623 // set bci
2624 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2625 // method may be redefined; store the version
2626 int version = method->constants()->version();
2627 assert((jushort)version == version, "version should be short");
2628 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2629 }
2630
2631 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2632 ResourceMark rm(THREAD);
2633 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2634 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2635 InstanceKlass* holder = InstanceKlass::cast(clazz);
2636 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2637
2638 short version = stackFrame->short_field(_version_offset);
2639 short bci = stackFrame->short_field(_bci_offset);
2640 Symbol* name = method->name();
2641 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2642 }
2643
2644 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2645 macro(_memberName_offset, k, "memberName", object_signature, false); \
2646 macro(_bci_offset, k, "bci", short_signature, false)
2647
2648 void java_lang_StackFrameInfo::compute_offsets() {
2649 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2650 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2651 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2652 }
2653
2654 #if INCLUDE_CDS
2655 void java_lang_StackFrameInfo::serialize(SerializeClosure* f) {
2656 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2657 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2658 }
2659 #endif
2660
2661 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2662 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2663 macro(_locals_offset, k, "locals", object_array_signature, false); \
2664 macro(_operands_offset, k, "operands", object_array_signature, false); \
2665 macro(_mode_offset, k, "mode", int_signature, false)
2666
2667 void java_lang_LiveStackFrameInfo::compute_offsets() {
2668 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2669 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2670 }
2671
2672 #if INCLUDE_CDS
2673 void java_lang_LiveStackFrameInfo::serialize(SerializeClosure* f) {
2674 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2675 }
2676 #endif
2677
2678 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2679 macro(override_offset, k, "override", bool_signature, false)
2680
2681 void java_lang_reflect_AccessibleObject::compute_offsets() {
2682 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2683 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2684 }
2685
2686 #if INCLUDE_CDS
2687 void java_lang_reflect_AccessibleObject::serialize(SerializeClosure* f) {
2688 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2689 }
2690 #endif
2691
2692 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2693 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2694 return (jboolean) reflect->bool_field(override_offset);
2695 }
2696
2697 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2698 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2699 reflect->bool_field_put(override_offset, (int) value);
2700 }
2701
2702 #define METHOD_FIELDS_DO(macro) \
2703 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2704 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2705 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2706 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2707 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2708 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2709 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2710 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \
2711 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \
2712 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \
2713 macro##_OPTIONAL(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature); \
2714 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature)
2715
2716 void java_lang_reflect_Method::compute_offsets() {
2717 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2718 // The generic signature and annotations fields are only present in 1.5
2719 signature_offset = -1;
2720 annotations_offset = -1;
2721 parameter_annotations_offset = -1;
2722 annotation_default_offset = -1;
2723 type_annotations_offset = -1;
2724 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2725 }
2726
2727 #if INCLUDE_CDS
2728 void java_lang_reflect_Method::serialize(SerializeClosure* f) {
2729 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2730 }
2731 #endif
2732
2733 Handle java_lang_reflect_Method::create(TRAPS) {
2734 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2735 Klass* klass = SystemDictionary::reflect_Method_klass();
2736 // This class is eagerly initialized during VM initialization, since we keep a refence
2737 // to one of the methods
2738 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2739 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2740 }
2741
2742 oop java_lang_reflect_Method::clazz(oop reflect) {
2743 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2744 return reflect->obj_field(clazz_offset);
2745 }
2746
2747 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2748 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2749 reflect->obj_field_put(clazz_offset, value);
2750 }
2751
2752 int java_lang_reflect_Method::slot(oop reflect) {
2753 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2754 return reflect->int_field(slot_offset);
2755 }
2756
2757 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2758 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2759 reflect->int_field_put(slot_offset, value);
2760 }
2761
2762 oop java_lang_reflect_Method::name(oop method) {
2763 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2764 return method->obj_field(name_offset);
2765 }
2766
2767 void java_lang_reflect_Method::set_name(oop method, oop value) {
2768 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2769 method->obj_field_put(name_offset, value);
2770 }
2771
2772 oop java_lang_reflect_Method::return_type(oop method) {
2773 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2774 return method->obj_field(returnType_offset);
2775 }
2776
2777 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2778 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2779 method->obj_field_put(returnType_offset, value);
2780 }
2781
2782 oop java_lang_reflect_Method::parameter_types(oop method) {
2783 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2784 return method->obj_field(parameterTypes_offset);
2785 }
2786
2787 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2788 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2789 method->obj_field_put(parameterTypes_offset, value);
2790 }
2791
2792 oop java_lang_reflect_Method::exception_types(oop method) {
2793 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2794 return method->obj_field(exceptionTypes_offset);
2795 }
2796
2797 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2798 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2799 method->obj_field_put(exceptionTypes_offset, value);
2800 }
2801
2802 int java_lang_reflect_Method::modifiers(oop method) {
2803 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2804 return method->int_field(modifiers_offset);
2805 }
2806
2807 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2808 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2809 method->int_field_put(modifiers_offset, value);
2810 }
2811
2812 bool java_lang_reflect_Method::has_signature_field() {
2813 return (signature_offset >= 0);
2814 }
2815
2816 oop java_lang_reflect_Method::signature(oop method) {
2817 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2818 assert(has_signature_field(), "signature field must be present");
2819 return method->obj_field(signature_offset);
2820 }
2821
2822 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2823 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2824 assert(has_signature_field(), "signature field must be present");
2825 method->obj_field_put(signature_offset, value);
2826 }
2827
2828 bool java_lang_reflect_Method::has_annotations_field() {
2829 return (annotations_offset >= 0);
2830 }
2831
2832 oop java_lang_reflect_Method::annotations(oop method) {
2833 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2834 assert(has_annotations_field(), "annotations field must be present");
2835 return method->obj_field(annotations_offset);
2836 }
2837
2838 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2839 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2840 assert(has_annotations_field(), "annotations field must be present");
2841 method->obj_field_put(annotations_offset, value);
2842 }
2843
2844 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2845 return (parameter_annotations_offset >= 0);
2846 }
2847
2848 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2849 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2850 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2851 return method->obj_field(parameter_annotations_offset);
2852 }
2853
2854 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2855 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2856 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2857 method->obj_field_put(parameter_annotations_offset, value);
2858 }
2859
2860 bool java_lang_reflect_Method::has_annotation_default_field() {
2861 return (annotation_default_offset >= 0);
2862 }
2863
2864 oop java_lang_reflect_Method::annotation_default(oop method) {
2865 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2866 assert(has_annotation_default_field(), "annotation default field must be present");
2867 return method->obj_field(annotation_default_offset);
2868 }
2869
2870 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2871 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2872 assert(has_annotation_default_field(), "annotation default field must be present");
2873 method->obj_field_put(annotation_default_offset, value);
2874 }
2875
2876 bool java_lang_reflect_Method::has_type_annotations_field() {
2877 return (type_annotations_offset >= 0);
2878 }
2879
2880 oop java_lang_reflect_Method::type_annotations(oop method) {
2881 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2882 assert(has_type_annotations_field(), "type_annotations field must be present");
2883 return method->obj_field(type_annotations_offset);
2884 }
2885
2886 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2887 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2888 assert(has_type_annotations_field(), "type_annotations field must be present");
2889 method->obj_field_put(type_annotations_offset, value);
2890 }
2891
2892 #define CONSTRUCTOR_FIELDS_DO(macro) \
2893 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2894 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2895 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2896 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2897 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2898 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \
2899 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \
2900 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \
2901 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature)
2902
2903
2904 void java_lang_reflect_Constructor::compute_offsets() {
2905 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2906 // The generic signature and annotations fields are only present in 1.5
2907 signature_offset = -1;
2908 annotations_offset = -1;
2909 parameter_annotations_offset = -1;
2910 type_annotations_offset = -1;
2911 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2912 }
2913
2914 #if INCLUDE_CDS
2915 void java_lang_reflect_Constructor::serialize(SerializeClosure* f) {
2916 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2917 }
2918 #endif
2919
2920 Handle java_lang_reflect_Constructor::create(TRAPS) {
2921 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2922 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2923 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2924 InstanceKlass* ik = InstanceKlass::cast(k);
2925 // Ensure it is initialized
2926 ik->initialize(CHECK_NH);
2927 return ik->allocate_instance_handle(THREAD);
2928 }
2929
2930 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2931 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2932 return reflect->obj_field(clazz_offset);
2933 }
2934
2935 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2936 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2937 reflect->obj_field_put(clazz_offset, value);
2938 }
2939
2940 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2941 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2942 return constructor->obj_field(parameterTypes_offset);
2943 }
2944
2945 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2946 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2947 constructor->obj_field_put(parameterTypes_offset, value);
2948 }
2949
2950 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2951 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2952 return constructor->obj_field(exceptionTypes_offset);
2953 }
2954
2955 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2956 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2957 constructor->obj_field_put(exceptionTypes_offset, value);
2958 }
2959
2960 int java_lang_reflect_Constructor::slot(oop reflect) {
2961 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2962 return reflect->int_field(slot_offset);
2963 }
2964
2965 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2966 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2967 reflect->int_field_put(slot_offset, value);
2968 }
2969
2970 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2972 return constructor->int_field(modifiers_offset);
2973 }
2974
2975 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2976 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2977 constructor->int_field_put(modifiers_offset, value);
2978 }
2979
2980 bool java_lang_reflect_Constructor::has_signature_field() {
2981 return (signature_offset >= 0);
2982 }
2983
2984 oop java_lang_reflect_Constructor::signature(oop constructor) {
2985 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2986 assert(has_signature_field(), "signature field must be present");
2987 return constructor->obj_field(signature_offset);
2988 }
2989
2990 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2992 assert(has_signature_field(), "signature field must be present");
2993 constructor->obj_field_put(signature_offset, value);
2994 }
2995
2996 bool java_lang_reflect_Constructor::has_annotations_field() {
2997 return (annotations_offset >= 0);
2998 }
2999
3000 oop java_lang_reflect_Constructor::annotations(oop constructor) {
3001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3002 assert(has_annotations_field(), "annotations field must be present");
3003 return constructor->obj_field(annotations_offset);
3004 }
3005
3006 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3008 assert(has_annotations_field(), "annotations field must be present");
3009 constructor->obj_field_put(annotations_offset, value);
3010 }
3011
3012 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
3013 return (parameter_annotations_offset >= 0);
3014 }
3015
3016 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
3017 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3018 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
3019 return method->obj_field(parameter_annotations_offset);
3020 }
3021
3022 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3023 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3024 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
3025 method->obj_field_put(parameter_annotations_offset, value);
3026 }
3027
3028 bool java_lang_reflect_Constructor::has_type_annotations_field() {
3029 return (type_annotations_offset >= 0);
3030 }
3031
3032 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
3033 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3034 assert(has_type_annotations_field(), "type_annotations field must be present");
3035 return constructor->obj_field(type_annotations_offset);
3036 }
3037
3038 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
3039 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3040 assert(has_type_annotations_field(), "type_annotations field must be present");
3041 constructor->obj_field_put(type_annotations_offset, value);
3042 }
3043
3044 #define FIELD_FIELDS_DO(macro) \
3045 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3046 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3047 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
3048 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3049 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3050 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \
3051 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \
3052 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature)
3053
3054 void java_lang_reflect_Field::compute_offsets() {
3055 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3056 // The generic signature and annotations fields are only present in 1.5
3057 signature_offset = -1;
3058 annotations_offset = -1;
3059 type_annotations_offset = -1;
3060 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3061 }
3062
3063 #if INCLUDE_CDS
3064 void java_lang_reflect_Field::serialize(SerializeClosure* f) {
3065 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3066 }
3067 #endif
3068
3069 Handle java_lang_reflect_Field::create(TRAPS) {
3070 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3071 Symbol* name = vmSymbols::java_lang_reflect_Field();
3072 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3073 InstanceKlass* ik = InstanceKlass::cast(k);
3074 // Ensure it is initialized
3075 ik->initialize(CHECK_NH);
3076 return ik->allocate_instance_handle(THREAD);
3077 }
3078
3079 oop java_lang_reflect_Field::clazz(oop reflect) {
3080 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3081 return reflect->obj_field(clazz_offset);
3082 }
3083
3084 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3085 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3086 reflect->obj_field_put(clazz_offset, value);
3087 }
3088
3089 oop java_lang_reflect_Field::name(oop field) {
3090 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3091 return field->obj_field(name_offset);
3092 }
3093
3094 void java_lang_reflect_Field::set_name(oop field, oop value) {
3095 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3096 field->obj_field_put(name_offset, value);
3097 }
3098
3099 oop java_lang_reflect_Field::type(oop field) {
3100 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3101 return field->obj_field(type_offset);
3102 }
3103
3104 void java_lang_reflect_Field::set_type(oop field, oop value) {
3105 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3106 field->obj_field_put(type_offset, value);
3107 }
3108
3109 int java_lang_reflect_Field::slot(oop reflect) {
3110 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3111 return reflect->int_field(slot_offset);
3112 }
3113
3114 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3115 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3116 reflect->int_field_put(slot_offset, value);
3117 }
3118
3119 int java_lang_reflect_Field::modifiers(oop field) {
3120 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3121 return field->int_field(modifiers_offset);
3122 }
3123
3124 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3125 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3126 field->int_field_put(modifiers_offset, value);
3127 }
3128
3129 bool java_lang_reflect_Field::has_signature_field() {
3130 return (signature_offset >= 0);
3131 }
3132
3133 oop java_lang_reflect_Field::signature(oop field) {
3134 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3135 assert(has_signature_field(), "signature field must be present");
3136 return field->obj_field(signature_offset);
3137 }
3138
3139 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3140 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3141 assert(has_signature_field(), "signature field must be present");
3142 field->obj_field_put(signature_offset, value);
3143 }
3144
3145 bool java_lang_reflect_Field::has_annotations_field() {
3146 return (annotations_offset >= 0);
3147 }
3148
3149 oop java_lang_reflect_Field::annotations(oop field) {
3150 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3151 assert(has_annotations_field(), "annotations field must be present");
3152 return field->obj_field(annotations_offset);
3153 }
3154
3155 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3156 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3157 assert(has_annotations_field(), "annotations field must be present");
3158 field->obj_field_put(annotations_offset, value);
3159 }
3160
3161 bool java_lang_reflect_Field::has_type_annotations_field() {
3162 return (type_annotations_offset >= 0);
3163 }
3164
3165 oop java_lang_reflect_Field::type_annotations(oop field) {
3166 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3167 assert(has_type_annotations_field(), "type_annotations field must be present");
3168 return field->obj_field(type_annotations_offset);
3169 }
3170
3171 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
3172 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3173 assert(has_type_annotations_field(), "type_annotations field must be present");
3174 field->obj_field_put(type_annotations_offset, value);
3175 }
3176
3177 #define CONSTANTPOOL_FIELDS_DO(macro) \
3178 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3179
3180 void reflect_ConstantPool::compute_offsets() {
3181 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3182 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3183 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3184 }
3185
3186 #if INCLUDE_CDS
3187 void reflect_ConstantPool::serialize(SerializeClosure* f) {
3188 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3189 }
3190 #endif
3191
3192 #define PARAMETER_FIELDS_DO(macro) \
3193 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3194 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3195 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3196 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3197
3198 void java_lang_reflect_Parameter::compute_offsets() {
3199 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3200 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3201 }
3202
3203 #if INCLUDE_CDS
3204 void java_lang_reflect_Parameter::serialize(SerializeClosure* f) {
3205 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3206 }
3207 #endif
3208
3209 Handle java_lang_reflect_Parameter::create(TRAPS) {
3210 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3211 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3212 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3213 InstanceKlass* ik = InstanceKlass::cast(k);
3214 // Ensure it is initialized
3215 ik->initialize(CHECK_NH);
3216 return ik->allocate_instance_handle(THREAD);
3217 }
3218
3219 oop java_lang_reflect_Parameter::name(oop param) {
3220 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3221 return param->obj_field(name_offset);
3222 }
3223
3224 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3225 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3226 param->obj_field_put(name_offset, value);
3227 }
3228
3229 int java_lang_reflect_Parameter::modifiers(oop param) {
3230 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3231 return param->int_field(modifiers_offset);
3232 }
3233
3234 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3235 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3236 param->int_field_put(modifiers_offset, value);
3237 }
3238
3239 int java_lang_reflect_Parameter::index(oop param) {
3240 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3241 return param->int_field(index_offset);
3242 }
3243
3244 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3245 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3246 param->int_field_put(index_offset, value);
3247 }
3248
3249 oop java_lang_reflect_Parameter::executable(oop param) {
3250 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3251 return param->obj_field(executable_offset);
3252 }
3253
3254 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3255 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3256 param->obj_field_put(executable_offset, value);
3257 }
3258
3259
3260 int java_lang_Module::loader_offset;
3261 int java_lang_Module::name_offset;
3262 int java_lang_Module::_module_entry_offset = -1;
3263
3264 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3265 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3266 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3267 vmSymbols::java_lang_module_init_signature(),
3268 loader, module_name, CHECK_NH);
3269 }
3270
3271 #define MODULE_FIELDS_DO(macro) \
3272 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3273 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3274
3275 void java_lang_Module::compute_offsets() {
3276 InstanceKlass* k = SystemDictionary::Module_klass();
3277 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3278 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3279 }
3280
3281 #if INCLUDE_CDS
3282 void java_lang_Module::serialize(SerializeClosure* f) {
3283 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3284 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3285 }
3286 #endif
3287
3288 oop java_lang_Module::loader(oop module) {
3289 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3290 return module->obj_field(loader_offset);
3291 }
3292
3293 void java_lang_Module::set_loader(oop module, oop value) {
3294 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3295 module->obj_field_put(loader_offset, value);
3296 }
3297
3298 oop java_lang_Module::name(oop module) {
3299 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3300 return module->obj_field(name_offset);
3301 }
3302
3303 void java_lang_Module::set_name(oop module, oop value) {
3304 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3305 module->obj_field_put(name_offset, value);
3306 }
3307
3308 ModuleEntry* java_lang_Module::module_entry(oop module) {
3309 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3310 assert(module != NULL, "module can't be null");
3311 assert(oopDesc::is_oop(module), "module must be oop");
3312
3313 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3314 if (module_entry == NULL) {
3315 // If the inject field containing the ModuleEntry* is null then return the
3316 // class loader's unnamed module.
3317 oop loader = java_lang_Module::loader(module);
3318 Handle h_loader = Handle(Thread::current(), loader);
3319 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3320 return loader_cld->unnamed_module();
3321 }
3322 return module_entry;
3323 }
3324
3325 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3326 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3327 assert(module != NULL, "module can't be null");
3328 assert(oopDesc::is_oop(module), "module must be oop");
3329 module->address_field_put(_module_entry_offset, (address)module_entry);
3330 }
3331
3332 Handle reflect_ConstantPool::create(TRAPS) {
3333 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3334 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3335 // Ensure it is initialized
3336 k->initialize(CHECK_NH);
3337 return k->allocate_instance_handle(THREAD);
3338 }
3339
3340
3341 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3342 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3343 oop mirror = value->pool_holder()->java_mirror();
3344 // Save the mirror to get back the constant pool.
3345 reflect->obj_field_put(_oop_offset, mirror);
3346 }
3347
3348 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3349 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3350
3351 oop mirror = reflect->obj_field(_oop_offset);
3352 Klass* k = java_lang_Class::as_Klass(mirror);
3353 assert(k->is_instance_klass(), "Must be");
3354
3355 // Get the constant pool back from the klass. Since class redefinition
3356 // merges the new constant pool into the old, this is essentially the
3357 // same constant pool as the original. If constant pool merging is
3358 // no longer done in the future, this will have to change to save
3359 // the original.
3360 return InstanceKlass::cast(k)->constants();
3361 }
3362
3363 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3364 macro(_base_offset, k, "base", object_signature, false)
3365
3366 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3367 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3368 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3369 }
3370
3371 #if INCLUDE_CDS
3372 void reflect_UnsafeStaticFieldAccessorImpl::serialize(SerializeClosure* f) {
3373 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3374 }
3375 #endif
3376
3377 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3378 Klass* k = SystemDictionary::box_klass(type);
3379 if (k == NULL) return NULL;
3380 InstanceKlass* ik = InstanceKlass::cast(k);
3381 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3382 return ik->allocate_instance(THREAD);
3383 }
3384
3385
3386 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3387 oop box = initialize_and_allocate(type, CHECK_0);
3388 if (box == NULL) return NULL;
3389 switch (type) {
3390 case T_BOOLEAN:
3391 box->bool_field_put(value_offset, value->z);
3392 break;
3393 case T_CHAR:
3394 box->char_field_put(value_offset, value->c);
3395 break;
3396 case T_FLOAT:
3397 box->float_field_put(value_offset, value->f);
3398 break;
3399 case T_DOUBLE:
3400 box->double_field_put(long_value_offset, value->d);
3401 break;
3402 case T_BYTE:
3403 box->byte_field_put(value_offset, value->b);
3404 break;
3405 case T_SHORT:
3406 box->short_field_put(value_offset, value->s);
3407 break;
3408 case T_INT:
3409 box->int_field_put(value_offset, value->i);
3410 break;
3411 case T_LONG:
3412 box->long_field_put(long_value_offset, value->j);
3413 break;
3414 default:
3415 return NULL;
3416 }
3417 return box;
3418 }
3419
3420
3421 BasicType java_lang_boxing_object::basic_type(oop box) {
3422 if (box == NULL) return T_ILLEGAL;
3423 BasicType type = SystemDictionary::box_klass_type(box->klass());
3424 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3425 return T_ILLEGAL;
3426 return type;
3427 }
3428
3429
3430 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3431 BasicType type = SystemDictionary::box_klass_type(box->klass());
3432 switch (type) {
3433 case T_BOOLEAN:
3434 value->z = box->bool_field(value_offset);
3435 break;
3436 case T_CHAR:
3437 value->c = box->char_field(value_offset);
3438 break;
3439 case T_FLOAT:
3440 value->f = box->float_field(value_offset);
3441 break;
3442 case T_DOUBLE:
3443 value->d = box->double_field(long_value_offset);
3444 break;
3445 case T_BYTE:
3446 value->b = box->byte_field(value_offset);
3447 break;
3448 case T_SHORT:
3449 value->s = box->short_field(value_offset);
3450 break;
3451 case T_INT:
3452 value->i = box->int_field(value_offset);
3453 break;
3454 case T_LONG:
3455 value->j = box->long_field(long_value_offset);
3456 break;
3457 default:
3458 return T_ILLEGAL;
3459 } // end switch
3460 return type;
3461 }
3462
3463
3464 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3465 BasicType type = SystemDictionary::box_klass_type(box->klass());
3466 switch (type) {
3467 case T_BOOLEAN:
3468 box->bool_field_put(value_offset, value->z);
3469 break;
3470 case T_CHAR:
3471 box->char_field_put(value_offset, value->c);
3472 break;
3473 case T_FLOAT:
3474 box->float_field_put(value_offset, value->f);
3475 break;
3476 case T_DOUBLE:
3477 box->double_field_put(long_value_offset, value->d);
3478 break;
3479 case T_BYTE:
3480 box->byte_field_put(value_offset, value->b);
3481 break;
3482 case T_SHORT:
3483 box->short_field_put(value_offset, value->s);
3484 break;
3485 case T_INT:
3486 box->int_field_put(value_offset, value->i);
3487 break;
3488 case T_LONG:
3489 box->long_field_put(long_value_offset, value->j);
3490 break;
3491 default:
3492 return T_ILLEGAL;
3493 } // end switch
3494 return type;
3495 }
3496
3497
3498 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3499 switch (type) {
3500 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3501 case T_CHAR: st->print("%d", value->c); break;
3502 case T_BYTE: st->print("%d", value->b); break;
3503 case T_SHORT: st->print("%d", value->s); break;
3504 case T_INT: st->print("%d", value->i); break;
3505 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3506 case T_FLOAT: st->print("%f", value->f); break;
3507 case T_DOUBLE: st->print("%lf", value->d); break;
3508 default: st->print("type %d?", type); break;
3509 }
3510 }
3511
3512 // Support for java_lang_ref_Reference
3513
3514 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3515 assert(obj != NULL, "sanity");
3516 if (offset != java_lang_ref_Reference::referent_offset) {
3517 return false;
3518 }
3519
3520 Klass* k = obj->klass();
3521 if (!k->is_instance_klass()) {
3522 return false;
3523 }
3524
3525 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3526 bool is_reference = ik->reference_type() != REF_NONE;
3527 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3528 return is_reference;
3529 }
3530
3531 // Support for java_lang_ref_SoftReference
3532 //
3533
3534 #define SOFTREFERENCE_FIELDS_DO(macro) \
3535 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3536 macro(static_clock_offset, k, "clock", long_signature, true)
3537
3538 void java_lang_ref_SoftReference::compute_offsets() {
3539 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3540 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3541 }
3542
3543 #if INCLUDE_CDS
3544 void java_lang_ref_SoftReference::serialize(SerializeClosure* f) {
3545 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3546 }
3547 #endif
3548
3549 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3550 return ref->long_field(timestamp_offset);
3551 }
3552
3553 jlong java_lang_ref_SoftReference::clock() {
3554 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3555 oop base = ik->static_field_base_raw();
3556 return base->long_field(static_clock_offset);
3557 }
3558
3559 void java_lang_ref_SoftReference::set_clock(jlong value) {
3560 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3561 oop base = ik->static_field_base_raw();
3562 base->long_field_put(static_clock_offset, value);
3563 }
3564
3565 // Support for java_lang_invoke_DirectMethodHandle
3566
3567 int java_lang_invoke_DirectMethodHandle::_member_offset;
3568
3569 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3570 oop member_name = NULL;
3571 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3572 "a DirectMethodHandle oop is expected");
3573 return dmh->obj_field(member_offset_in_bytes());
3574 }
3575
3576 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3577 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3578
3579 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3580 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3581 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3582 }
3583
3584 #if INCLUDE_CDS
3585 void java_lang_invoke_DirectMethodHandle::serialize(SerializeClosure* f) {
3586 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3587 }
3588 #endif
3589
3590 // Support for java_lang_invoke_MethodHandle
3591
3592 int java_lang_invoke_MethodHandle::_type_offset;
3593 int java_lang_invoke_MethodHandle::_form_offset;
3594
3595 int java_lang_invoke_MemberName::_clazz_offset;
3596 int java_lang_invoke_MemberName::_name_offset;
3597 int java_lang_invoke_MemberName::_type_offset;
3598 int java_lang_invoke_MemberName::_flags_offset;
3599 int java_lang_invoke_MemberName::_method_offset;
3600 int java_lang_invoke_MemberName::_vmindex_offset;
3601
3602 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3603 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3604
3605 int java_lang_invoke_LambdaForm::_vmentry_offset;
3606
3607 #define METHODHANDLE_FIELDS_DO(macro) \
3608 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3609 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3610
3611 void java_lang_invoke_MethodHandle::compute_offsets() {
3612 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3613 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3614 }
3615
3616 #if INCLUDE_CDS
3617 void java_lang_invoke_MethodHandle::serialize(SerializeClosure* f) {
3618 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3619 }
3620 #endif
3621
3622 #define MEMBERNAME_FIELDS_DO(macro) \
3623 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3624 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3625 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3626 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3627 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3628
3629 void java_lang_invoke_MemberName::compute_offsets() {
3630 InstanceKlass* k = SystemDictionary::MemberName_klass();
3631 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3632 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3633 }
3634
3635 #if INCLUDE_CDS
3636 void java_lang_invoke_MemberName::serialize(SerializeClosure* f) {
3637 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3638 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3639 }
3640 #endif
3641
3642 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3643 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3644 assert(k != NULL, "jdk mismatch");
3645 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3646 }
3647
3648 #if INCLUDE_CDS
3649 void java_lang_invoke_ResolvedMethodName::serialize(SerializeClosure* f) {
3650 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3651 }
3652 #endif
3653
3654 #define LAMBDAFORM_FIELDS_DO(macro) \
3655 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3656
3657 void java_lang_invoke_LambdaForm::compute_offsets() {
3658 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3659 assert (k != NULL, "jdk mismatch");
3660 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3661 }
3662
3663 #if INCLUDE_CDS
3664 void java_lang_invoke_LambdaForm::serialize(SerializeClosure* f) {
3665 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3666 }
3667 #endif
3668
3669 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3670 return obj != NULL && is_subclass(obj->klass());
3671 }
3672
3673
3674 oop java_lang_invoke_MethodHandle::type(oop mh) {
3675 return mh->obj_field(_type_offset);
3676 }
3677
3678 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3679 mh->obj_field_put(_type_offset, mtype);
3680 }
3681
3682 oop java_lang_invoke_MethodHandle::form(oop mh) {
3683 assert(_form_offset != 0, "");
3684 return mh->obj_field(_form_offset);
3685 }
3686
3687 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3688 assert(_form_offset != 0, "");
3689 mh->obj_field_put(_form_offset, lform);
3690 }
3691
3692 /// MemberName accessors
3693
3694 oop java_lang_invoke_MemberName::clazz(oop mname) {
3695 assert(is_instance(mname), "wrong type");
3696 return mname->obj_field(_clazz_offset);
3697 }
3698
3699 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3700 assert(is_instance(mname), "wrong type");
3701 mname->obj_field_put(_clazz_offset, clazz);
3702 }
3703
3704 oop java_lang_invoke_MemberName::name(oop mname) {
3705 assert(is_instance(mname), "wrong type");
3706 return mname->obj_field(_name_offset);
3707 }
3708
3709 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3710 assert(is_instance(mname), "wrong type");
3711 mname->obj_field_put(_name_offset, name);
3712 }
3713
3714 oop java_lang_invoke_MemberName::type(oop mname) {
3715 assert(is_instance(mname), "wrong type");
3716 return mname->obj_field(_type_offset);
3717 }
3718
3719 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3720 assert(is_instance(mname), "wrong type");
3721 mname->obj_field_put(_type_offset, type);
3722 }
3723
3724 int java_lang_invoke_MemberName::flags(oop mname) {
3725 assert(is_instance(mname), "wrong type");
3726 return mname->int_field(_flags_offset);
3727 }
3728
3729 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3730 assert(is_instance(mname), "wrong type");
3731 mname->int_field_put(_flags_offset, flags);
3732 }
3733
3734
3735 // Return vmtarget from ResolvedMethodName method field through indirection
3736 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3737 assert(is_instance(mname), "wrong type");
3738 oop method = mname->obj_field(_method_offset);
3739 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3740 }
3741
3742 bool java_lang_invoke_MemberName::is_method(oop mname) {
3743 assert(is_instance(mname), "must be MemberName");
3744 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3745 }
3746
3747 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3748 assert(is_instance(mname), "wrong type");
3749 mname->obj_field_put(_method_offset, resolved_method);
3750 }
3751
3752 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3753 assert(is_instance(mname), "wrong type");
3754 return (intptr_t) mname->address_field(_vmindex_offset);
3755 }
3756
3757 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3758 assert(is_instance(mname), "wrong type");
3759 mname->address_field_put(_vmindex_offset, (address) index);
3760 }
3761
3762
3763 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3764 assert(is_instance(resolved_method), "wrong type");
3765 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3766 assert(m->is_method(), "must be");
3767 return m;
3768 }
3769
3770 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3771 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3772 assert(is_instance(resolved_method), "wrong type");
3773 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3774 }
3775
3776 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3777 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3778 oop resolved_method = ResolvedMethodTable::find_method(m());
3779 if (resolved_method == NULL) {
3780 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3781 if (!k->is_initialized()) {
3782 k->initialize(CHECK_NULL);
3783 }
3784 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3785 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3786 // Add a reference to the loader (actually mirror because anonymous classes will not have
3787 // distinct loaders) to ensure the metadata is kept alive.
3788 // This mirror may be different than the one in clazz field.
3789 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3790 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method));
3791 }
3792 return resolved_method;
3793 }
3794
3795 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3796 assert(is_instance(lform), "wrong type");
3797 return lform->obj_field(_vmentry_offset);
3798 }
3799
3800
3801 // Support for java_lang_invoke_MethodType
3802
3803 int java_lang_invoke_MethodType::_rtype_offset;
3804 int java_lang_invoke_MethodType::_ptypes_offset;
3805
3806 #define METHODTYPE_FIELDS_DO(macro) \
3807 macro(_rtype_offset, k, "rtype", class_signature, false); \
3808 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3809
3810 void java_lang_invoke_MethodType::compute_offsets() {
3811 InstanceKlass* k = SystemDictionary::MethodType_klass();
3812 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3813 }
3814
3815 #if INCLUDE_CDS
3816 void java_lang_invoke_MethodType::serialize(SerializeClosure* f) {
3817 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3818 }
3819 #endif
3820
3821 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3822 st->print("(");
3823 objArrayOop pts = ptypes(mt);
3824 for (int i = 0, limit = pts->length(); i < limit; i++) {
3825 java_lang_Class::print_signature(pts->obj_at(i), st);
3826 }
3827 st->print(")");
3828 java_lang_Class::print_signature(rtype(mt), st);
3829 }
3830
3831 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3832 ResourceMark rm;
3833 stringStream buffer(128);
3834 print_signature(mt, &buffer);
3835 const char* sigstr = buffer.base();
3836 int siglen = (int) buffer.size();
3837 Symbol *name;
3838 if (!intern_if_not_found) {
3839 name = SymbolTable::probe(sigstr, siglen);
3840 } else {
3841 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3842 }
3843 return name;
3844 }
3845
3846 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3847 if (oopDesc::equals(mt1, mt2))
3848 return true;
3849 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3850 return false;
3851 if (ptype_count(mt1) != ptype_count(mt2))
3852 return false;
3853 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3854 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3855 return false;
3856 }
3857 return true;
3858 }
3859
3860 oop java_lang_invoke_MethodType::rtype(oop mt) {
3861 assert(is_instance(mt), "must be a MethodType");
3862 return mt->obj_field(_rtype_offset);
3863 }
3864
3865 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3866 assert(is_instance(mt), "must be a MethodType");
3867 return (objArrayOop) mt->obj_field(_ptypes_offset);
3868 }
3869
3870 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3871 return ptypes(mt)->obj_at(idx);
3872 }
3873
3874 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3875 return ptypes(mt)->length();
3876 }
3877
3878 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3879 objArrayOop pts = ptypes(mt);
3880 int count = pts->length();
3881 int slots = 0;
3882 for (int i = 0; i < count; i++) {
3883 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3884 slots += type2size[bt];
3885 }
3886 return slots;
3887 }
3888
3889 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3890 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3891 return type2size[bt];
3892 }
3893
3894
3895 // Support for java_lang_invoke_CallSite
3896
3897 int java_lang_invoke_CallSite::_target_offset;
3898 int java_lang_invoke_CallSite::_context_offset;
3899
3900 #define CALLSITE_FIELDS_DO(macro) \
3901 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3902 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3903
3904 void java_lang_invoke_CallSite::compute_offsets() {
3905 InstanceKlass* k = SystemDictionary::CallSite_klass();
3906 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3907 }
3908
3909 #if INCLUDE_CDS
3910 void java_lang_invoke_CallSite::serialize(SerializeClosure* f) {
3911 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3912 }
3913 #endif
3914
3915 oop java_lang_invoke_CallSite::context(oop call_site) {
3916 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3917
3918 oop dep_oop = call_site->obj_field(_context_offset);
3919 return dep_oop;
3920 }
3921
3922 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3923
3924 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3925
3926 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3927 InstanceKlass* k = SystemDictionary::Context_klass();
3928 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3929 }
3930
3931 #if INCLUDE_CDS
3932 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize(SerializeClosure* f) {
3933 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3934 }
3935 #endif
3936
3937 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3938 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3939 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset);
3940 DependencyContext dep_ctx(vmdeps_addr);
3941 return dep_ctx;
3942 }
3943
3944 // Support for java_security_AccessControlContext
3945
3946 int java_security_AccessControlContext::_context_offset = 0;
3947 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3948 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3949 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3950
3951 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3952 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3953 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3954 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3955 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3956
3957 void java_security_AccessControlContext::compute_offsets() {
3958 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3959 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3960 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3961 }
3962
3963 #if INCLUDE_CDS
3964 void java_security_AccessControlContext::serialize(SerializeClosure* f) {
3965 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3966 }
3967 #endif
3968
3969 bool java_security_AccessControlContext::is_authorized(Handle context) {
3970 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3971 assert(_isAuthorized_offset != -1, "should be set");
3972 return context->bool_field(_isAuthorized_offset) != 0;
3973 }
3974
3975 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3976 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3977 // Ensure klass is initialized
3978 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3979 // Allocate result
3980 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3981 // Fill in values
3982 result->obj_field_put(_context_offset, context());
3983 result->obj_field_put(_privilegedContext_offset, privileged_context());
3984 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3985 // whitelist AccessControlContexts created by the JVM if present
3986 if (_isAuthorized_offset != -1) {
3987 result->bool_field_put(_isAuthorized_offset, true);
3988 }
3989 return result;
3990 }
3991
3992
3993 // Support for java_lang_ClassLoader
3994
3995 bool java_lang_ClassLoader::offsets_computed = false;
3996 int java_lang_ClassLoader::_loader_data_offset = -1;
3997 int java_lang_ClassLoader::parallelCapable_offset = -1;
3998 int java_lang_ClassLoader::name_offset = -1;
3999 int java_lang_ClassLoader::unnamedModule_offset = -1;
4000
4001 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4002 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
4003 return HeapAccess<>::load_at(loader, _loader_data_offset);
4004 }
4005
4006 ClassLoaderData* java_lang_ClassLoader::cmpxchg_loader_data(ClassLoaderData* new_data, oop loader, ClassLoaderData* expected_data) {
4007 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
4008 return HeapAccess<>::atomic_cmpxchg_at(new_data, loader, _loader_data_offset, expected_data);
4009 }
4010
4011 #define CLASSLOADER_FIELDS_DO(macro) \
4012 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4013 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4014 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4015 macro(parent_offset, k1, "parent", classloader_signature, false)
4016
4017 void java_lang_ClassLoader::compute_offsets() {
4018 assert(!offsets_computed, "offsets should be initialized only once");
4019 offsets_computed = true;
4020
4021 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
4022 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4023
4024 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4025 }
4026
4027 #if INCLUDE_CDS
4028 void java_lang_ClassLoader::serialize(SerializeClosure* f) {
4029 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4030 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4031 }
4032 #endif
4033
4034 oop java_lang_ClassLoader::parent(oop loader) {
4035 assert(is_instance(loader), "loader must be oop");
4036 return loader->obj_field(parent_offset);
4037 }
4038
4039 oop java_lang_ClassLoader::name(oop loader) {
4040 assert(is_instance(loader), "loader must be oop");
4041 return loader->obj_field(name_offset);
4042 }
4043
4044 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4045 assert(is_instance(loader), "loader must be oop");
4046 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
4047 oop acl = loader;
4048 debug_only(jint loop_count = 0);
4049 // This loop taken verbatim from ClassLoader.java:
4050 do {
4051 acl = parent(acl);
4052 if (oopDesc::equals(cl, acl)) {
4053 return true;
4054 }
4055 assert(++loop_count > 0, "loop_count overflow");
4056 } while (acl != NULL);
4057 return false;
4058 }
4059
4060 bool java_lang_ClassLoader::is_instance(oop obj) {
4061 return obj != NULL && is_subclass(obj->klass());
4062 }
4063
4064
4065 // For class loader classes, parallelCapable defined
4066 // based on non-null field
4067 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4068 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4069 if (parallelCapable_offset == -1) {
4070 // Default for backward compatibility is false
4071 return false;
4072 }
4073 return (class_loader->obj_field(parallelCapable_offset) != NULL);
4074 }
4075
4076 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4077 // Fix for 4474172; see evaluation for more details
4078 loader = non_reflection_class_loader(loader);
4079
4080 oop cl = SystemDictionary::java_system_loader();
4081 while(cl != NULL) {
4082 if (oopDesc::equals(cl, loader)) return true;
4083 cl = parent(cl);
4084 }
4085 return false;
4086 }
4087
4088 // Return true if this is one of the class loaders associated with
4089 // the generated bytecodes for reflection.
4090 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4091 if (loader != NULL) {
4092 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4093 // This might be null in non-1.4 JDKs
4094 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4095 }
4096 return false;
4097 }
4098
4099 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4100 // See whether this is one of the class loaders associated with
4101 // the generated bytecodes for reflection, and if so, "magically"
4102 // delegate to its parent to prevent class loading from occurring
4103 // in places where applications using reflection didn't expect it.
4104 if (is_reflection_class_loader(loader)) {
4105 return parent(loader);
4106 }
4107 return loader;
4108 }
4109
4110 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4111 assert(is_instance(loader), "loader must be oop");
4112 return loader->obj_field(unnamedModule_offset);
4113 }
4114
4115 // Caller needs ResourceMark.
4116 const char* java_lang_ClassLoader::describe_external(const oop loader) {
4117 if (loader == NULL) {
4118 return "<bootstrap>";
4119 }
4120
4121 bool well_known_loader = SystemDictionary::is_system_class_loader(loader) ||
4122 SystemDictionary::is_platform_class_loader(loader);
4123
4124 const char* name = NULL;
4125 oop nameOop = java_lang_ClassLoader::name(loader);
4126 if (nameOop != NULL) {
4127 name = java_lang_String::as_utf8_string(nameOop);
4128 }
4129 if (name == NULL) {
4130 // Use placeholder for missing name to have fixed message format.
4131 name = "<unnamed>";
4132 }
4133
4134 stringStream ss;
4135 ss.print("\"%s\" (instance of %s", name, loader->klass()->external_name());
4136 if (!well_known_loader) {
4137 const char* parentName = NULL;
4138 oop pl = java_lang_ClassLoader::parent(loader);
4139 if (pl != NULL) {
4140 oop parentNameOop = java_lang_ClassLoader::name(pl);
4141 if (parentNameOop != NULL) {
4142 parentName = java_lang_String::as_utf8_string(parentNameOop);
4143 }
4144 if (parentName == NULL) {
4145 parentName = "<unnamed>";
4146 }
4147 ss.print(", child of \"%s\" %s", parentName, pl->klass()->external_name());
4148 } else {
4149 ss.print(", child of <bootstrap>");
4150 }
4151 }
4152 ss.print(")");
4153
4154 return ss.as_string();
4155 }
4156
4157 // Support for java_lang_System
4158 //
4159 #define SYSTEM_FIELDS_DO(macro) \
4160 macro(static_in_offset, k, "in", input_stream_signature, true); \
4161 macro(static_out_offset, k, "out", print_stream_signature, true); \
4162 macro(static_err_offset, k, "err", print_stream_signature, true); \
4163 macro(static_security_offset, k, "security", security_manager_signature, true)
4164
4165 void java_lang_System::compute_offsets() {
4166 InstanceKlass* k = SystemDictionary::System_klass();
4167 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4168 }
4169
4170 #if INCLUDE_CDS
4171 void java_lang_System::serialize(SerializeClosure* f) {
4172 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4173 }
4174 #endif
4175
4176 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4177 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4178 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4179
4180
4181 bool java_lang_System::has_security_manager() {
4182 InstanceKlass* ik = SystemDictionary::System_klass();
4183 oop base = ik->static_field_base_raw();
4184 return base->obj_field(static_security_offset) != NULL;
4185 }
4186
4187 int java_lang_Class::_klass_offset;
4188 int java_lang_Class::_array_klass_offset;
4189 int java_lang_Class::_oop_size_offset;
4190 int java_lang_Class::_static_oop_field_count_offset;
4191 int java_lang_Class::_class_loader_offset;
4192 int java_lang_Class::_module_offset;
4193 int java_lang_Class::_protection_domain_offset;
4194 int java_lang_Class::_component_mirror_offset;
4195 int java_lang_Class::_init_lock_offset;
4196 int java_lang_Class::_signers_offset;
4197 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4198 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4199 int java_lang_Throwable::backtrace_offset;
4200 int java_lang_Throwable::detailMessage_offset;
4201 int java_lang_Throwable::cause_offset;
4202 int java_lang_Throwable::stackTrace_offset;
4203 int java_lang_Throwable::depth_offset;
4204 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4205 int java_lang_reflect_AccessibleObject::override_offset;
4206 int java_lang_reflect_Method::clazz_offset;
4207 int java_lang_reflect_Method::name_offset;
4208 int java_lang_reflect_Method::returnType_offset;
4209 int java_lang_reflect_Method::parameterTypes_offset;
4210 int java_lang_reflect_Method::exceptionTypes_offset;
4211 int java_lang_reflect_Method::slot_offset;
4212 int java_lang_reflect_Method::modifiers_offset;
4213 int java_lang_reflect_Method::signature_offset;
4214 int java_lang_reflect_Method::annotations_offset;
4215 int java_lang_reflect_Method::parameter_annotations_offset;
4216 int java_lang_reflect_Method::annotation_default_offset;
4217 int java_lang_reflect_Method::type_annotations_offset;
4218 int java_lang_reflect_Constructor::clazz_offset;
4219 int java_lang_reflect_Constructor::parameterTypes_offset;
4220 int java_lang_reflect_Constructor::exceptionTypes_offset;
4221 int java_lang_reflect_Constructor::slot_offset;
4222 int java_lang_reflect_Constructor::modifiers_offset;
4223 int java_lang_reflect_Constructor::signature_offset;
4224 int java_lang_reflect_Constructor::annotations_offset;
4225 int java_lang_reflect_Constructor::parameter_annotations_offset;
4226 int java_lang_reflect_Constructor::type_annotations_offset;
4227 int java_lang_reflect_Field::clazz_offset;
4228 int java_lang_reflect_Field::name_offset;
4229 int java_lang_reflect_Field::type_offset;
4230 int java_lang_reflect_Field::slot_offset;
4231 int java_lang_reflect_Field::modifiers_offset;
4232 int java_lang_reflect_Field::signature_offset;
4233 int java_lang_reflect_Field::annotations_offset;
4234 int java_lang_reflect_Field::type_annotations_offset;
4235 int java_lang_reflect_Parameter::name_offset;
4236 int java_lang_reflect_Parameter::modifiers_offset;
4237 int java_lang_reflect_Parameter::index_offset;
4238 int java_lang_reflect_Parameter::executable_offset;
4239 int java_lang_boxing_object::value_offset;
4240 int java_lang_boxing_object::long_value_offset;
4241 int java_lang_ref_Reference::referent_offset;
4242 int java_lang_ref_Reference::queue_offset;
4243 int java_lang_ref_Reference::next_offset;
4244 int java_lang_ref_Reference::discovered_offset;
4245 int java_lang_ref_SoftReference::timestamp_offset;
4246 int java_lang_ref_SoftReference::static_clock_offset;
4247 int java_lang_ClassLoader::parent_offset;
4248 int java_lang_System::static_in_offset;
4249 int java_lang_System::static_out_offset;
4250 int java_lang_System::static_err_offset;
4251 int java_lang_System::static_security_offset;
4252 int java_lang_StackTraceElement::methodName_offset;
4253 int java_lang_StackTraceElement::fileName_offset;
4254 int java_lang_StackTraceElement::lineNumber_offset;
4255 int java_lang_StackTraceElement::moduleName_offset;
4256 int java_lang_StackTraceElement::moduleVersion_offset;
4257 int java_lang_StackTraceElement::classLoaderName_offset;
4258 int java_lang_StackTraceElement::declaringClass_offset;
4259 int java_lang_StackTraceElement::declaringClassObject_offset;
4260 int java_lang_StackFrameInfo::_memberName_offset;
4261 int java_lang_StackFrameInfo::_bci_offset;
4262 int java_lang_StackFrameInfo::_version_offset;
4263 int java_lang_LiveStackFrameInfo::_monitors_offset;
4264 int java_lang_LiveStackFrameInfo::_locals_offset;
4265 int java_lang_LiveStackFrameInfo::_operands_offset;
4266 int java_lang_LiveStackFrameInfo::_mode_offset;
4267 int java_lang_AssertionStatusDirectives::classes_offset;
4268 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4269 int java_lang_AssertionStatusDirectives::packages_offset;
4270 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4271 int java_lang_AssertionStatusDirectives::deflt_offset;
4272 int java_nio_Buffer::_limit_offset;
4273 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
4274 int reflect_ConstantPool::_oop_offset;
4275 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4276
4277 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4278 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4279 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4280 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4281 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4282 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4283 macro(methodName_offset, k, "methodName", string_signature, false); \
4284 macro(fileName_offset, k, "fileName", string_signature, false); \
4285 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4286
4287 // Support for java_lang_StackTraceElement
4288 void java_lang_StackTraceElement::compute_offsets() {
4289 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4290 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4291 }
4292
4293 #if INCLUDE_CDS
4294 void java_lang_StackTraceElement::serialize(SerializeClosure* f) {
4295 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4296 }
4297 #endif
4298
4299 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4300 element->obj_field_put(fileName_offset, value);
4301 }
4302
4303 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4304 element->obj_field_put(declaringClass_offset, value);
4305 }
4306
4307 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4308 element->obj_field_put(methodName_offset, value);
4309 }
4310
4311 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4312 element->int_field_put(lineNumber_offset, value);
4313 }
4314
4315 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4316 element->obj_field_put(moduleName_offset, value);
4317 }
4318
4319 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4320 element->obj_field_put(moduleVersion_offset, value);
4321 }
4322
4323 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4324 element->obj_field_put(classLoaderName_offset, value);
4325 }
4326
4327 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4328 element->obj_field_put(declaringClassObject_offset, value);
4329 }
4330
4331 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4332 element->short_field_put(_version_offset, value);
4333 }
4334
4335 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4336 element->int_field_put(_bci_offset, value);
4337 }
4338
4339 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4340 element->obj_field_put(_monitors_offset, value);
4341 }
4342
4343 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4344 element->obj_field_put(_locals_offset, value);
4345 }
4346
4347 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4348 element->obj_field_put(_operands_offset, value);
4349 }
4350
4351 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4352 element->int_field_put(_mode_offset, value);
4353 }
4354
4355 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4356 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4357 macro(classes_offset, k, "classes", string_array_signature, false); \
4358 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4359 macro(packages_offset, k, "packages", string_array_signature, false); \
4360 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4361 macro(deflt_offset, k, "deflt", bool_signature, false)
4362
4363 void java_lang_AssertionStatusDirectives::compute_offsets() {
4364 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4365 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4366 }
4367
4368 #if INCLUDE_CDS
4369 void java_lang_AssertionStatusDirectives::serialize(SerializeClosure* f) {
4370 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4371 }
4372 #endif
4373
4374 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4375 o->obj_field_put(classes_offset, val);
4376 }
4377
4378 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4379 o->obj_field_put(classEnabled_offset, val);
4380 }
4381
4382 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4383 o->obj_field_put(packages_offset, val);
4384 }
4385
4386 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4387 o->obj_field_put(packageEnabled_offset, val);
4388 }
4389
4390 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4391 o->bool_field_put(deflt_offset, val);
4392 }
4393
4394
4395 // Support for intrinsification of java.nio.Buffer.checkIndex
4396 int java_nio_Buffer::limit_offset() {
4397 return _limit_offset;
4398 }
4399
4400 #define BUFFER_FIELDS_DO(macro) \
4401 macro(_limit_offset, k, "limit", int_signature, false)
4402
4403 void java_nio_Buffer::compute_offsets() {
4404 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4405 assert(k != NULL, "must be loaded in 1.4+");
4406 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4407 }
4408
4409 #if INCLUDE_CDS
4410 void java_nio_Buffer::serialize(SerializeClosure* f) {
4411 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4412 }
4413 #endif
4414
4415 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
4416 if (_owner_offset != 0) return;
4417
4418 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
4419 InstanceKlass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
4420 compute_offset(_owner_offset, k,
4421 "exclusiveOwnerThread", vmSymbols::thread_signature());
4422 }
4423
4424 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4425 assert(_owner_offset != 0, "Must be initialized");
4426 return obj->obj_field(_owner_offset);
4427 }
4428
4429 static int member_offset(int hardcoded_offset) {
4430 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4431 }
4432
4433 // Compute hard-coded offsets
4434 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4435 // are not available to determine the offset_of_static_fields.
4436 void JavaClasses::compute_hard_coded_offsets() {
4437
4438 // java_lang_boxing_object
4439 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4440 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4441
4442 // java_lang_ref_Reference
4443 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4444 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4445 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4446 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4447 }
4448
4449
4450 // Compute non-hard-coded field offsets of all the classes in this file
4451 void JavaClasses::compute_offsets() {
4452 if (UseSharedSpaces) {
4453 return; // field offsets are loaded from archive
4454 }
4455
4456 // java_lang_Class::compute_offsets was called earlier in bootstrap
4457 java_lang_System::compute_offsets();
4458 java_lang_ClassLoader::compute_offsets();
4459 java_lang_Throwable::compute_offsets();
4460 java_lang_Thread::compute_offsets();
4461 java_lang_ThreadGroup::compute_offsets();
4462 java_lang_AssertionStatusDirectives::compute_offsets();
4463 java_lang_ref_SoftReference::compute_offsets();
4464 java_lang_invoke_MethodHandle::compute_offsets();
4465 java_lang_invoke_DirectMethodHandle::compute_offsets();
4466 java_lang_invoke_MemberName::compute_offsets();
4467 java_lang_invoke_ResolvedMethodName::compute_offsets();
4468 java_lang_invoke_LambdaForm::compute_offsets();
4469 java_lang_invoke_MethodType::compute_offsets();
4470 java_lang_invoke_CallSite::compute_offsets();
4471 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
4472 java_security_AccessControlContext::compute_offsets();
4473 // Initialize reflection classes. The layouts of these classes
4474 // changed with the new reflection implementation in JDK 1.4, and
4475 // since the Universe doesn't know what JDK version it is until this
4476 // point we defer computation of these offsets until now.
4477 java_lang_reflect_AccessibleObject::compute_offsets();
4478 java_lang_reflect_Method::compute_offsets();
4479 java_lang_reflect_Constructor::compute_offsets();
4480 java_lang_reflect_Field::compute_offsets();
4481 java_nio_Buffer::compute_offsets();
4482 reflect_ConstantPool::compute_offsets();
4483 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
4484 java_lang_reflect_Parameter::compute_offsets();
4485 java_lang_Module::compute_offsets();
4486 java_lang_StackTraceElement::compute_offsets();
4487 java_lang_StackFrameInfo::compute_offsets();
4488 java_lang_LiveStackFrameInfo::compute_offsets();
4489
4490 // generated interpreter code wants to know about the offsets we just computed:
4491 AbstractAssembler::update_delayed_values();
4492 }
4493
4494 #ifndef PRODUCT
4495
4496 // These functions exist to assert the validity of hard-coded field offsets to guard
4497 // against changes in the class files
4498
4499 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4500 EXCEPTION_MARK;
4501 fieldDescriptor fd;
4502 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4503 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4504 InstanceKlass* ik = InstanceKlass::cast(k);
4505 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4506 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4507 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4508 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4509 return false;
4510 }
4511 if (fd.is_static()) {
4512 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4513 return false;
4514 }
4515 if (fd.offset() == hardcoded_offset ) {
4516 return true;
4517 } else {
4518 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4519 klass_name, field_name, hardcoded_offset, fd.offset());
4520 return false;
4521 }
4522 }
4523
4524 // Check the hard-coded field offsets of all the classes in this file
4525
4526 void JavaClasses::check_offsets() {
4527 bool valid = true;
4528
4529 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4530 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4531
4532 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4533 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4534
4535 // Boxed primitive objects (java_lang_boxing_object)
4536
4537 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4538 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4539 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4540 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4541 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4542 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4543 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4544 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4545
4546 // java.lang.ref.Reference
4547
4548 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4549 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4550 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4551 // Fake field
4552 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4553
4554 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4555 }
4556
4557 #endif // PRODUCT
4558
4559 int InjectedField::compute_offset() {
4560 InstanceKlass* ik = InstanceKlass::cast(klass());
4561 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4562 if (!may_be_java && !fs.access_flags().is_internal()) {
4563 // Only look at injected fields
4564 continue;
4565 }
4566 if (fs.name() == name() && fs.signature() == signature()) {
4567 return fs.offset();
4568 }
4569 }
4570 ResourceMark rm;
4571 tty->print_cr("Invalid layout of %s at %s/%s%s", ik->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : "");
4572 #ifndef PRODUCT
4573 ik->print();
4574 tty->print_cr("all fields:");
4575 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4576 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4577 }
4578 #endif //PRODUCT
4579 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
4580 return -1;
4581 }
4582
4583 void javaClasses_init() {
4584 JavaClasses::compute_offsets();
4585 JavaClasses::check_offsets();
4586 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4587 }