1 /*
2 * Copyright (c) 1997, 2019, 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/heapShared.inline.hpp"
40 #include "memory/metaspaceShared.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "memory/universe.hpp"
44 #include "oops/fieldStreams.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/instanceMirrorKlass.hpp"
47 #include "oops/klass.hpp"
48 #include "oops/method.inline.hpp"
49 #include "oops/objArrayOop.inline.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/symbol.hpp"
52 #include "oops/typeArrayOop.inline.hpp"
53 #include "prims/jvmtiExport.hpp"
54 #include "prims/resolvedMethodTable.hpp"
55 #include "runtime/fieldDescriptor.inline.hpp"
56 #include "runtime/frame.inline.hpp"
57 #include "runtime/handles.inline.hpp"
58 #include "runtime/interfaceSupport.inline.hpp"
59 #include "runtime/java.hpp"
60 #include "runtime/javaCalls.hpp"
61 #include "runtime/jniHandles.inline.hpp"
62 #include "runtime/safepoint.hpp"
63 #include "runtime/safepointVerifiers.hpp"
64 #include "runtime/thread.inline.hpp"
65 #include "runtime/vframe.inline.hpp"
66 #include "utilities/align.hpp"
67 #include "utilities/preserveException.hpp"
68 #include "utilities/utf8.hpp"
69 #if INCLUDE_JVMCI
70 #include "jvmci/jvmciJavaClasses.hpp"
71 #endif
72
73 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
74 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
75
76 #if INCLUDE_CDS
77 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
78 f->do_u4((u4*)&_##name##_offset);
79 #endif
80
81 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
82 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
83
84 InjectedField JavaClasses::_injected_fields[] = {
85 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
86 };
87
88 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
89 return _injected_fields[id].compute_offset();
90 }
91
92 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
93 *field_count = 0;
94
95 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
96 if (sid == vmSymbols::NO_SID) {
97 // Only well known classes can inject fields
98 return NULL;
99 }
100
101 int count = 0;
102 int start = -1;
103
104 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
105 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
106 count++; \
107 if (start == -1) start = klass##_##name##_enum; \
108 }
109 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
110 #undef LOOKUP_INJECTED_FIELD
111
112 if (start != -1) {
113 *field_count = count;
114 return _injected_fields + start;
115 }
116 return NULL;
117 }
118
119
120 // Helpful routine for computing field offsets at run time rather than hardcoding them
121 // Finds local fields only, including static fields. Static field offsets are from the
122 // beginning of the mirror.
123 static void compute_offset(int &dest_offset,
124 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
125 bool is_static = false) {
126 fieldDescriptor fd;
127 if (ik == NULL) {
128 ResourceMark rm;
129 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
130 vm_exit_during_initialization("Invalid layout of well-known class");
131 }
132
133 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
134 ResourceMark rm;
135 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
136 name_symbol->as_C_string(), signature_symbol->as_C_string());
137 #ifndef PRODUCT
138 // Prints all fields and offsets
139 Log(class) lt;
140 LogStream ls(lt.error());
141 ik->print_on(&ls);
142 #endif //PRODUCT
143 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
144 }
145 dest_offset = fd.offset();
146 }
147
148 // Overloading to pass name as a string.
149 static void compute_offset(int& dest_offset, InstanceKlass* ik,
150 const char* name_string, Symbol* signature_symbol,
151 bool is_static = false) {
152 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
153 if (name == NULL) {
154 ResourceMark rm;
155 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
156 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
157 }
158 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
159 }
160
161 int java_lang_String::value_offset = 0;
162 int java_lang_String::hash_offset = 0;
163 int java_lang_String::hashIsZero_offset = 0;
164 int java_lang_String::coder_offset = 0;
165
166 bool java_lang_String::initialized = false;
167
168 bool java_lang_String::is_instance(oop obj) {
169 return is_instance_inlined(obj);
170 }
171
172 #if INCLUDE_CDS
173 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
174 f->do_u4((u4*)&offset)
175 #endif
176
177 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
178 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
179
180 #define STRING_FIELDS_DO(macro) \
181 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
182 macro(hash_offset, k, "hash", int_signature, false); \
183 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
184 macro(coder_offset, k, "coder", byte_signature, false);
185
186 void java_lang_String::compute_offsets() {
187 if (initialized) {
188 return;
189 }
190
191 InstanceKlass* k = SystemDictionary::String_klass();
192 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
193
194 initialized = true;
195 }
196
197 #if INCLUDE_CDS
198 void java_lang_String::serialize_offsets(SerializeClosure* f) {
199 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
200 f->do_u4((u4*)&initialized);
201 }
202 #endif
203
204 class CompactStringsFixup : public FieldClosure {
205 private:
206 bool _value;
207
208 public:
209 CompactStringsFixup(bool value) : _value(value) {}
210
211 void do_field(fieldDescriptor* fd) {
212 if (fd->name() == vmSymbols::compact_strings_name()) {
213 oop mirror = fd->field_holder()->java_mirror();
214 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
215 assert(mirror != NULL, "String must have mirror already");
216 mirror->bool_field_put(fd->offset(), _value);
217 }
218 }
219 };
220
221 void java_lang_String::set_compact_strings(bool value) {
222 CompactStringsFixup fix(value);
223 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
224 }
225
226 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
227 assert(initialized, "Must be initialized");
228 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
229
230 // Create the String object first, so there's a chance that the String
231 // and the char array it points to end up in the same cache line.
232 oop obj;
233 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
234
235 // Create the char array. The String object must be handlized here
236 // because GC can happen as a result of the allocation attempt.
237 Handle h_obj(THREAD, obj);
238 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
239 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
240
241 // Point the String at the char array
242 obj = h_obj();
243 set_value(obj, buffer);
244 // No need to zero the offset, allocation zero'ed the entire String object
245 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
246 return h_obj;
247 }
248
249 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
250 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
251 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
252 typeArrayOop buffer = value(h_obj());
253 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
254 if (is_latin1) {
255 for (int index = 0; index < length; index++) {
256 buffer->byte_at_put(index, (jbyte)unicode[index]);
257 }
258 } else {
259 for (int index = 0; index < length; index++) {
260 buffer->char_at_put(index, unicode[index]);
261 }
262 }
263
264 #ifdef ASSERT
265 {
266 ResourceMark rm;
267 char* expected = UNICODE::as_utf8(unicode, length);
268 char* actual = as_utf8_string(h_obj());
269 if (strcmp(expected, actual) != 0) {
270 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
271 ShouldNotReachHere();
272 }
273 }
274 #endif
275
276 return h_obj;
277 }
278
279 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
280 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
281 return h_obj();
282 }
283
284 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
285 if (utf8_str == NULL) {
286 return Handle();
287 }
288 bool has_multibyte, is_latin1;
289 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
290 if (!CompactStrings) {
291 has_multibyte = true;
292 is_latin1 = false;
293 }
294
295 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
296 if (length > 0) {
297 if (!has_multibyte) {
298 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
299 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
300 } else if (is_latin1) {
301 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
302 } else {
303 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
304 }
305 }
306
307 #ifdef ASSERT
308 // This check is too strict because the input string is not necessarily valid UTF8.
309 // For example, it may be created with arbitrary content via jni_NewStringUTF.
310 /*
311 {
312 ResourceMark rm;
313 const char* expected = utf8_str;
314 char* actual = as_utf8_string(h_obj());
315 if (strcmp(expected, actual) != 0) {
316 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
317 ShouldNotReachHere();
318 }
319 }
320 */
321 #endif
322
323 return h_obj;
324 }
325
326 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
327 Handle h_obj = create_from_str(utf8_str, CHECK_0);
328 return h_obj();
329 }
330
331 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
332 const char* utf8_str = (char*)symbol->bytes();
333 int utf8_len = symbol->utf8_length();
334
335 bool has_multibyte, is_latin1;
336 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
337 if (!CompactStrings) {
338 has_multibyte = true;
339 is_latin1 = false;
340 }
341
342 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
343 if (length > 0) {
344 if (!has_multibyte) {
345 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
346 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
347 } else if (is_latin1) {
348 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
349 } else {
350 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
351 }
352 }
353
354 #ifdef ASSERT
355 {
356 ResourceMark rm;
357 const char* expected = symbol->as_utf8();
358 char* actual = as_utf8_string(h_obj());
359 if (strncmp(expected, actual, utf8_len) != 0) {
360 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
361 ShouldNotReachHere();
362 }
363 }
364 #endif
365
366 return h_obj;
367 }
368
369 // Converts a C string to a Java String based on current encoding
370 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
371 assert(str != NULL, "bad arguments");
372
373 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
374 static to_java_string_fn_t _to_java_string_fn = NULL;
375
376 if (_to_java_string_fn == NULL) {
377 void *lib_handle = os::native_java_library();
378 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
379 if (_to_java_string_fn == NULL) {
380 fatal("NewStringPlatform missing");
381 }
382 }
383
384 jstring js = NULL;
385 { JavaThread* thread = (JavaThread*)THREAD;
386 assert(thread->is_Java_thread(), "must be java thread");
387 HandleMark hm(thread);
388 ThreadToNativeFromVM ttn(thread);
389 js = (_to_java_string_fn)(thread->jni_environment(), str);
390 }
391 return Handle(THREAD, JNIHandles::resolve(js));
392 }
393
394 // Converts a Java String to a native C string that can be used for
395 // native OS calls.
396 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
397 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
398 static to_platform_string_fn_t _to_platform_string_fn = NULL;
399
400 if (_to_platform_string_fn == NULL) {
401 void *lib_handle = os::native_java_library();
402 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
403 if (_to_platform_string_fn == NULL) {
404 fatal("GetStringPlatformChars missing");
405 }
406 }
407
408 char *native_platform_string;
409 { JavaThread* thread = (JavaThread*)THREAD;
410 assert(thread->is_Java_thread(), "must be java thread");
411 JNIEnv *env = thread->jni_environment();
412 jstring js = (jstring) JNIHandles::make_local(env, java_string());
413 bool is_copy;
414 HandleMark hm(thread);
415 ThreadToNativeFromVM ttn(thread);
416 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
417 assert(is_copy == JNI_TRUE, "is_copy value changed");
418 JNIHandles::destroy_local(js);
419 }
420 return native_platform_string;
421 }
422
423 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
424 oop obj = java_string();
425 // Typical usage is to convert all '/' to '.' in string.
426 typeArrayOop value = java_lang_String::value(obj);
427 int length = java_lang_String::length(obj, value);
428 bool is_latin1 = java_lang_String::is_latin1(obj);
429
430 // First check if any from_char exist
431 int index; // Declared outside, used later
432 for (index = 0; index < length; index++) {
433 jchar c = !is_latin1 ? value->char_at(index) :
434 ((jchar) value->byte_at(index)) & 0xff;
435 if (c == from_char) {
436 break;
437 }
438 }
439 if (index == length) {
440 // No from_char, so do not copy.
441 return java_string;
442 }
443
444 // Check if result string will be latin1
445 bool to_is_latin1 = false;
446
447 // Replacement char must be latin1
448 if (CompactStrings && UNICODE::is_latin1(to_char)) {
449 if (is_latin1) {
450 // Source string is latin1 as well
451 to_is_latin1 = true;
452 } else if (!UNICODE::is_latin1(from_char)) {
453 // We are replacing an UTF16 char. Scan string to
454 // check if result can be latin1 encoded.
455 to_is_latin1 = true;
456 for (index = 0; index < length; index++) {
457 jchar c = value->char_at(index);
458 if (c != from_char && !UNICODE::is_latin1(c)) {
459 to_is_latin1 = false;
460 break;
461 }
462 }
463 }
464 }
465
466 // Create new UNICODE (or byte) buffer. Must handlize value because GC
467 // may happen during String and char array creation.
468 typeArrayHandle h_value(THREAD, value);
469 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
470 typeArrayOop from_buffer = h_value();
471 typeArrayOop to_buffer = java_lang_String::value(string());
472
473 // Copy contents
474 for (index = 0; index < length; index++) {
475 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
476 ((jchar) from_buffer->byte_at(index)) & 0xff;
477 if (c == from_char) {
478 c = to_char;
479 }
480 if (!to_is_latin1) {
481 to_buffer->char_at_put(index, c);
482 } else {
483 to_buffer->byte_at_put(index, (jbyte) c);
484 }
485 }
486 return string;
487 }
488
489 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
490 typeArrayOop value = java_lang_String::value(java_string);
491 length = java_lang_String::length(java_string, value);
492 bool is_latin1 = java_lang_String::is_latin1(java_string);
493
494 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
495 if (result != NULL) {
496 if (!is_latin1) {
497 for (int index = 0; index < length; index++) {
498 result[index] = value->char_at(index);
499 }
500 } else {
501 for (int index = 0; index < length; index++) {
502 result[index] = ((jchar) value->byte_at(index)) & 0xff;
503 }
504 }
505 } else {
506 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
507 }
508 return result;
509 }
510
511 unsigned int java_lang_String::hash_code(oop java_string) {
512 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized");
513 if (java_lang_String::hash_is_set(java_string)) {
514 return java_string->int_field(hash_offset);
515 }
516
517 typeArrayOop value = java_lang_String::value(java_string);
518 int length = java_lang_String::length(java_string, value);
519 bool is_latin1 = java_lang_String::is_latin1(java_string);
520
521 unsigned int hash = 0;
522 if (length > 0) {
523 if (is_latin1) {
524 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
525 } else {
526 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
527 }
528 }
529
530 if (hash != 0) {
531 java_string->int_field_put(hash_offset, hash);
532 } else {
533 java_string->bool_field_put(hashIsZero_offset, true);
534 }
535 return hash;
536 }
537
538 char* java_lang_String::as_quoted_ascii(oop java_string) {
539 typeArrayOop value = java_lang_String::value(java_string);
540 int length = java_lang_String::length(java_string, value);
541 bool is_latin1 = java_lang_String::is_latin1(java_string);
542
543 if (length == 0) return NULL;
544
545 char* result;
546 int result_length;
547 if (!is_latin1) {
548 jchar* base = value->char_at_addr(0);
549 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
550 result = NEW_RESOURCE_ARRAY(char, result_length);
551 UNICODE::as_quoted_ascii(base, length, result, result_length);
552 } else {
553 jbyte* base = value->byte_at_addr(0);
554 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
555 result = NEW_RESOURCE_ARRAY(char, result_length);
556 UNICODE::as_quoted_ascii(base, length, result, result_length);
557 }
558 assert(result_length >= length + 1, "must not be shorter");
559 assert(result_length == (int)strlen(result) + 1, "must match");
560 return result;
561 }
562
563 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
564 typeArrayOop value = java_lang_String::value(java_string);
565 int length = java_lang_String::length(java_string, value);
566 bool is_latin1 = java_lang_String::is_latin1(java_string);
567 if (!is_latin1) {
568 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
569 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
570 return sym;
571 } else {
572 ResourceMark rm;
573 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
574 const char* base = UNICODE::as_utf8(position, length);
575 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
576 return sym;
577 }
578 }
579
580 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
581 typeArrayOop value = java_lang_String::value(java_string);
582 int length = java_lang_String::length(java_string, value);
583 bool is_latin1 = java_lang_String::is_latin1(java_string);
584 if (!is_latin1) {
585 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
586 return SymbolTable::probe_unicode(base, length);
587 } else {
588 ResourceMark rm;
589 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
590 const char* base = UNICODE::as_utf8(position, length);
591 return SymbolTable::probe(base, length);
592 }
593 }
594
595 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
596 assert(value_equals(value, java_lang_String::value(java_string)),
597 "value must be same as java_lang_String::value(java_string)");
598 int length = java_lang_String::length(java_string, value);
599 if (length == 0) {
600 return 0;
601 }
602 if (!java_lang_String::is_latin1(java_string)) {
603 return UNICODE::utf8_length(value->char_at_addr(0), length);
604 } else {
605 return UNICODE::utf8_length(value->byte_at_addr(0), length);
606 }
607 }
608
609 int java_lang_String::utf8_length(oop java_string) {
610 typeArrayOop value = java_lang_String::value(java_string);
611 return utf8_length(java_string, value);
612 }
613
614 char* java_lang_String::as_utf8_string(oop java_string) {
615 typeArrayOop value = java_lang_String::value(java_string);
616 int length = java_lang_String::length(java_string, value);
617 bool is_latin1 = java_lang_String::is_latin1(java_string);
618 if (!is_latin1) {
619 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
620 return UNICODE::as_utf8(position, length);
621 } else {
622 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
623 return UNICODE::as_utf8(position, length);
624 }
625 }
626
627 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
628 assert(value_equals(value, java_lang_String::value(java_string)),
629 "value must be same as java_lang_String::value(java_string)");
630 int length = java_lang_String::length(java_string, value);
631 bool is_latin1 = java_lang_String::is_latin1(java_string);
632 if (!is_latin1) {
633 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
634 return UNICODE::as_utf8(position, length, buf, buflen);
635 } else {
636 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
637 return UNICODE::as_utf8(position, length, buf, buflen);
638 }
639 }
640
641 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
642 typeArrayOop value = java_lang_String::value(java_string);
643 return as_utf8_string(java_string, value, buf, buflen);
644 }
645
646 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
647 typeArrayOop value = java_lang_String::value(java_string);
648 bool is_latin1 = java_lang_String::is_latin1(java_string);
649 assert(start + len <= java_lang_String::length(java_string), "just checking");
650 if (!is_latin1) {
651 jchar* position = value->char_at_addr(start);
652 return UNICODE::as_utf8(position, len);
653 } else {
654 jbyte* position = value->byte_at_addr(start);
655 return UNICODE::as_utf8(position, len);
656 }
657 }
658
659 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
660 assert(value_equals(value, java_lang_String::value(java_string)),
661 "value must be same as java_lang_String::value(java_string)");
662 assert(start + len <= java_lang_String::length(java_string), "just checking");
663 bool is_latin1 = java_lang_String::is_latin1(java_string);
664 if (!is_latin1) {
665 jchar* position = value->char_at_addr(start);
666 return UNICODE::as_utf8(position, len, buf, buflen);
667 } else {
668 jbyte* position = value->byte_at_addr(start);
669 return UNICODE::as_utf8(position, len, buf, buflen);
670 }
671 }
672
673 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
674 assert(java_string->klass() == SystemDictionary::String_klass(),
675 "must be java_string");
676 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
677 int length = java_lang_String::length(java_string, value);
678 if (length != len) {
679 return false;
680 }
681 bool is_latin1 = java_lang_String::is_latin1(java_string);
682 if (!is_latin1) {
683 for (int i = 0; i < len; i++) {
684 if (value->char_at(i) != chars[i]) {
685 return false;
686 }
687 }
688 } else {
689 for (int i = 0; i < len; i++) {
690 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
691 return false;
692 }
693 }
694 }
695 return true;
696 }
697
698 bool java_lang_String::equals(oop str1, oop str2) {
699 assert(str1->klass() == SystemDictionary::String_klass(),
700 "must be java String");
701 assert(str2->klass() == SystemDictionary::String_klass(),
702 "must be java String");
703 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
704 bool is_latin1 = java_lang_String::is_latin1(str1);
705 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
706 bool is_latin2 = java_lang_String::is_latin1(str2);
707
708 if (is_latin1 != is_latin2) {
709 // Strings with different coders are never equal.
710 return false;
711 }
712 return value_equals(value1, value2);
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, value);
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 && HeapShared::is_archived_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 (HeapShared::open_archive_heap_region_mapped()) {
810 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
811 assert(present, "Missing archived mirror for %s", k->external_name());
812 return;
813 } else {
814 k->set_java_mirror_handle(NULL);
815 k->clear_has_raw_archived_mirror();
816 }
817 }
818 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
819 }
820
821 void java_lang_Class::initialize_mirror_fields(Klass* k,
822 Handle mirror,
823 Handle protection_domain,
824 TRAPS) {
825 // Allocate a simple java object for a lock.
826 // This needs to be a java object because during class initialization
827 // it can be held across a java call.
828 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
829 set_init_lock(mirror(), r);
830
831 // Set protection domain also
832 set_protection_domain(mirror(), protection_domain());
833
834 // Initialize static fields
835 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
836 }
837
838 // Set the java.lang.Module module field in the java_lang_Class mirror
839 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
840 if (module.is_null()) {
841 // During startup, the module may be NULL only if java.base has not been defined yet.
842 // Put the class on the fixup_module_list to patch later when the java.lang.Module
843 // for java.base is known. But note that since we captured the NULL module another
844 // thread may have completed that initialization.
845
846 bool javabase_was_defined = false;
847 {
848 MutexLocker m1(Module_lock, THREAD);
849 // Keep list of classes needing java.base module fixup
850 if (!ModuleEntryTable::javabase_defined()) {
851 assert(k->java_mirror() != NULL, "Class's mirror is null");
852 k->class_loader_data()->inc_keep_alive();
853 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
854 fixup_module_field_list()->push(k);
855 } else {
856 javabase_was_defined = true;
857 }
858 }
859
860 // If java.base was already defined then patch this particular class with java.base.
861 if (javabase_was_defined) {
862 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
863 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
864 "Setting class module field, " JAVA_BASE_NAME " should be defined");
865 Handle javabase_handle(THREAD, javabase_entry->module());
866 set_module(mirror(), javabase_handle());
867 }
868 } else {
869 assert(Universe::is_module_initialized() ||
870 (ModuleEntryTable::javabase_defined() &&
871 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
872 "Incorrect java.lang.Module specification while creating mirror");
873 set_module(mirror(), module());
874 }
875 }
876
877 // Statically allocate fixup lists because they always get created.
878 void java_lang_Class::allocate_fixup_lists() {
879 GrowableArray<Klass*>* mirror_list =
880 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
881 set_fixup_mirror_list(mirror_list);
882
883 GrowableArray<Klass*>* module_list =
884 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
885 set_fixup_module_field_list(module_list);
886 }
887
888 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
889 Handle module, Handle protection_domain, TRAPS) {
890 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
891 assert(k->java_mirror() == NULL, "should only assign mirror once");
892
893 // Use this moment of initialization to cache modifier_flags also,
894 // to support Class.getModifiers(). Instance classes recalculate
895 // the cached flags after the class file is parsed, but before the
896 // class is put into the system dictionary.
897 int computed_modifiers = k->compute_modifier_flags(CHECK);
898 k->set_modifier_flags(computed_modifiers);
899 // Class_klass has to be loaded because it is used to allocate
900 // the mirror.
901 if (SystemDictionary::Class_klass_loaded()) {
902 // Allocate mirror (java.lang.Class instance)
903 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
904 Handle mirror(THREAD, mirror_oop);
905 Handle comp_mirror;
906
907 // Setup indirection from mirror->klass
908 java_lang_Class::set_klass(mirror(), k);
909
910 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
911 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
912
913 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
914
915 // It might also have a component mirror. This mirror must already exist.
916 if (k->is_array_klass()) {
917 if (k->is_typeArray_klass()) {
918 BasicType type = TypeArrayKlass::cast(k)->element_type();
919 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
920 } else {
921 assert(k->is_objArray_klass(), "Must be");
922 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
923 assert(element_klass != NULL, "Must have an element klass");
924 comp_mirror = Handle(THREAD, element_klass->java_mirror());
925 }
926 assert(comp_mirror() != NULL, "must have a mirror");
927
928 // Two-way link between the array klass and its component mirror:
929 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
930 set_component_mirror(mirror(), comp_mirror());
931 // See below for ordering dependencies between field array_klass in component mirror
932 // and java_mirror in this klass.
933 } else {
934 assert(k->is_instance_klass(), "Must be");
935
936 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
937 if (HAS_PENDING_EXCEPTION) {
938 // If any of the fields throws an exception like OOM remove the klass field
939 // from the mirror so GC doesn't follow it after the klass has been deallocated.
940 // This mirror looks like a primitive type, which logically it is because it
941 // it represents no class.
942 java_lang_Class::set_klass(mirror(), NULL);
943 return;
944 }
945 }
946
947 // set the classLoader field in the java_lang_Class instance
948 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
949 set_class_loader(mirror(), class_loader());
950
951 // Setup indirection from klass->mirror
952 // after any exceptions can happen during allocations.
953 k->set_java_mirror(mirror);
954
955 // Set the module field in the java_lang_Class instance. This must be done
956 // after the mirror is set.
957 set_mirror_module_field(k, mirror, module, THREAD);
958
959 if (comp_mirror() != NULL) {
960 // Set after k->java_mirror() is published, because compiled code running
961 // concurrently doesn't expect a k to have a null java_mirror.
962 release_set_array_klass(comp_mirror(), k);
963 }
964 } else {
965 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
966 fixup_mirror_list()->push(k);
967 }
968 }
969
970 #if INCLUDE_CDS_JAVA_HEAP
971 // Clears mirror fields. Static final fields with initial values are reloaded
972 // from constant pool. The object identity hash is in the object header and is
973 // not affected.
974 class ResetMirrorField: public FieldClosure {
975 private:
976 Handle _m;
977
978 public:
979 ResetMirrorField(Handle mirror) : _m(mirror) {}
980
981 void do_field(fieldDescriptor* fd) {
982 assert(DumpSharedSpaces, "dump time only");
983 assert(_m.not_null(), "Mirror cannot be NULL");
984
985 if (fd->is_static() && fd->has_initial_value()) {
986 initialize_static_field(fd, _m, Thread::current());
987 return;
988 }
989
990 BasicType ft = fd->field_type();
991 switch (ft) {
992 case T_BYTE:
993 _m()->byte_field_put(fd->offset(), 0);
994 break;
995 case T_CHAR:
996 _m()->char_field_put(fd->offset(), 0);
997 break;
998 case T_DOUBLE:
999 _m()->double_field_put(fd->offset(), 0);
1000 break;
1001 case T_FLOAT:
1002 _m()->float_field_put(fd->offset(), 0);
1003 break;
1004 case T_INT:
1005 _m()->int_field_put(fd->offset(), 0);
1006 break;
1007 case T_LONG:
1008 _m()->long_field_put(fd->offset(), 0);
1009 break;
1010 case T_SHORT:
1011 _m()->short_field_put(fd->offset(), 0);
1012 break;
1013 case T_BOOLEAN:
1014 _m()->bool_field_put(fd->offset(), false);
1015 break;
1016 case T_ARRAY:
1017 case T_OBJECT: {
1018 // It might be useful to cache the String field, but
1019 // for now just clear out any reference field
1020 oop o = _m()->obj_field(fd->offset());
1021 _m()->obj_field_put(fd->offset(), NULL);
1022 break;
1023 }
1024 default:
1025 ShouldNotReachHere();
1026 break;
1027 }
1028 }
1029 };
1030
1031 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1032 assert(HeapShared::is_heap_object_archiving_allowed(),
1033 "HeapShared::is_heap_object_archiving_allowed() must be true");
1034
1035 for (int t = 0; t <= T_VOID; t++) {
1036 oop m = Universe::_mirrors[t];
1037 if (m != NULL) {
1038 // Update the field at _array_klass_offset to point to the relocated array klass.
1039 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1040 assert(archived_m != NULL, "sanity");
1041 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1042 assert(ak != NULL || t == T_VOID, "should not be NULL");
1043 if (ak != NULL) {
1044 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1045 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1046 }
1047
1048 // Clear the fields. Just to be safe
1049 Klass *k = m->klass();
1050 Handle archived_mirror_h(THREAD, archived_m);
1051 ResetMirrorField reset(archived_mirror_h);
1052 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1053
1054 log_trace(cds, heap, mirror)(
1055 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1056 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1057
1058 Universe::_mirrors[t] = archived_m;
1059 }
1060 }
1061
1062 assert(Universe::_mirrors[T_INT] != NULL &&
1063 Universe::_mirrors[T_FLOAT] != NULL &&
1064 Universe::_mirrors[T_DOUBLE] != NULL &&
1065 Universe::_mirrors[T_BYTE] != NULL &&
1066 Universe::_mirrors[T_BOOLEAN] != NULL &&
1067 Universe::_mirrors[T_CHAR] != NULL &&
1068 Universe::_mirrors[T_LONG] != NULL &&
1069 Universe::_mirrors[T_SHORT] != NULL &&
1070 Universe::_mirrors[T_VOID] != NULL, "sanity");
1071
1072 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1073 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1074 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1075 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1076 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1077 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1078 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1079 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1080 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1081 }
1082
1083 //
1084 // After the mirror object is successfully archived, the archived
1085 // klass is set with _has_archived_raw_mirror flag.
1086 //
1087 // The _has_archived_raw_mirror flag is cleared at runtime when the
1088 // archived mirror is restored. If archived java heap data cannot
1089 // be used at runtime, new mirror object is created for the shared
1090 // class. The _has_archived_raw_mirror is cleared also during the process.
1091 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1092 assert(HeapShared::is_heap_object_archiving_allowed(),
1093 "HeapShared::is_heap_object_archiving_allowed() must be true");
1094
1095 // Mirror is already archived
1096 if (k->has_raw_archived_mirror()) {
1097 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1098 return k->archived_java_mirror_raw();
1099 }
1100
1101 // No mirror
1102 oop mirror = k->java_mirror();
1103 if (mirror == NULL) {
1104 return NULL;
1105 }
1106
1107 if (k->is_instance_klass()) {
1108 InstanceKlass *ik = InstanceKlass::cast(k);
1109 assert(ik->signers() == NULL, "class with signer should have been excluded");
1110
1111 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1112 ik->is_shared_app_class())) {
1113 // Archiving mirror for classes from non-builtin loaders is not
1114 // supported. Clear the _java_mirror within the archived class.
1115 k->set_java_mirror_handle(NULL);
1116 return NULL;
1117 }
1118 }
1119
1120 // Now start archiving the mirror object
1121 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1122 if (archived_mirror == NULL) {
1123 return NULL;
1124 }
1125
1126 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1127 if (archived_mirror == NULL) {
1128 return NULL;
1129 }
1130
1131 k->set_archived_java_mirror_raw(archived_mirror);
1132
1133 k->set_has_raw_archived_mirror();
1134
1135 ResourceMark rm;
1136 log_trace(cds, heap, mirror)(
1137 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1138 k->external_name(), p2i(mirror), p2i(archived_mirror));
1139
1140 return archived_mirror;
1141 }
1142
1143 // The process is based on create_mirror().
1144 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1145 oop archived_mirror,
1146 Thread *THREAD) {
1147 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1148 // to archived metadata and objects below.
1149 Klass *c = archived_mirror->klass();
1150 Handle archived_mirror_h(THREAD, archived_mirror);
1151 ResetMirrorField reset(archived_mirror_h);
1152 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1153
1154 if (k->is_array_klass()) {
1155 oop archived_comp_mirror;
1156 if (k->is_typeArray_klass()) {
1157 // The primitive type mirrors are already archived. Get the archived mirror.
1158 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1159 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1160 assert(archived_comp_mirror != NULL, "Must be");
1161 } else {
1162 assert(k->is_objArray_klass(), "Must be");
1163 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1164 assert(element_klass != NULL, "Must have an element klass");
1165 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1166 if (archived_comp_mirror == NULL) {
1167 return NULL;
1168 }
1169 }
1170 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1171 } else {
1172 assert(k->is_instance_klass(), "Must be");
1173
1174 // Reset local static fields in the mirror
1175 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1176
1177 java_lang_Class:set_init_lock(archived_mirror, NULL);
1178
1179 set_protection_domain(archived_mirror, NULL);
1180 }
1181
1182 // clear class loader and mirror_module_field
1183 set_class_loader(archived_mirror, NULL);
1184 set_module(archived_mirror, NULL);
1185
1186 // The archived mirror's field at _klass_offset is still pointing to the original
1187 // klass. Updated the field in the archived mirror to point to the relocated
1188 // klass in the archive.
1189 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1190 log_debug(cds, heap, mirror)(
1191 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1192 p2i(as_Klass(mirror)), p2i(reloc_k));
1193 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1194
1195 // The field at _array_klass_offset is pointing to the original one dimension
1196 // higher array klass if exists. Relocate the pointer.
1197 Klass *arr = array_klass_acquire(mirror);
1198 if (arr != NULL) {
1199 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1200 log_debug(cds, heap, mirror)(
1201 "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 // Returns true if the mirror is updated, false if no archived mirror
1209 // data is present. After the archived mirror object is restored, the
1210 // shared klass' _has_raw_archived_mirror flag is cleared.
1211 bool java_lang_Class::restore_archived_mirror(Klass *k,
1212 Handle class_loader, Handle module,
1213 Handle protection_domain, TRAPS) {
1214 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1215 // see more details in SystemDictionary::resolve_well_known_classes().
1216 if (!SystemDictionary::Class_klass_loaded()) {
1217 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1218 fixup_mirror_list()->push(k);
1219 return true;
1220 }
1221
1222 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1223
1224 if (m == NULL) {
1225 return false;
1226 }
1227
1228 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1229
1230 // mirror is archived, restore
1231 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1232 Handle mirror(THREAD, m);
1233
1234 if (!k->is_array_klass()) {
1235 // - local static final fields with initial values were initialized at dump time
1236
1237 // create the init_lock
1238 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1239 set_init_lock(mirror(), r);
1240
1241 if (protection_domain.not_null()) {
1242 set_protection_domain(mirror(), protection_domain());
1243 }
1244 }
1245
1246 assert(class_loader() == k->class_loader(), "should be same");
1247 if (class_loader.not_null()) {
1248 set_class_loader(mirror(), class_loader());
1249 }
1250
1251 k->set_java_mirror(mirror);
1252 k->clear_has_raw_archived_mirror();
1253
1254 set_mirror_module_field(k, mirror, module, THREAD);
1255
1256 ResourceMark rm;
1257 log_trace(cds, heap, mirror)(
1258 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1259
1260 return true;
1261 }
1262 #endif // INCLUDE_CDS_JAVA_HEAP
1263
1264 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1265 assert(_module_offset != 0, "must have been computed already");
1266 java_lang_Class::set_module(k->java_mirror(), module());
1267 }
1268
1269 int java_lang_Class::oop_size(oop java_class) {
1270 assert(_oop_size_offset != 0, "must be set");
1271 int size = java_class->int_field(_oop_size_offset);
1272 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1273 return size;
1274 }
1275
1276
1277 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1278 assert(_oop_size_offset != 0, "must be set");
1279 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1280 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1281 }
1282
1283 int java_lang_Class::static_oop_field_count(oop java_class) {
1284 assert(_static_oop_field_count_offset != 0, "must be set");
1285 return java_class->int_field(_static_oop_field_count_offset);
1286 }
1287
1288 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1289 assert(_static_oop_field_count_offset != 0, "must be set");
1290 return java_class->int_field_raw(_static_oop_field_count_offset);
1291 }
1292
1293 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1294 assert(_static_oop_field_count_offset != 0, "must be set");
1295 java_class->int_field_put(_static_oop_field_count_offset, size);
1296 }
1297
1298 oop java_lang_Class::protection_domain(oop java_class) {
1299 assert(_protection_domain_offset != 0, "must be set");
1300 return java_class->obj_field(_protection_domain_offset);
1301 }
1302 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1303 assert(_protection_domain_offset != 0, "must be set");
1304 java_class->obj_field_put(_protection_domain_offset, pd);
1305 }
1306
1307 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1308 assert(_component_mirror_offset != 0, "must be set");
1309 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1310 }
1311 oop java_lang_Class::component_mirror(oop java_class) {
1312 assert(_component_mirror_offset != 0, "must be set");
1313 return java_class->obj_field(_component_mirror_offset);
1314 }
1315
1316 oop java_lang_Class::init_lock(oop java_class) {
1317 assert(_init_lock_offset != 0, "must be set");
1318 return java_class->obj_field(_init_lock_offset);
1319 }
1320 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1321 assert(_init_lock_offset != 0, "must be set");
1322 java_class->obj_field_put(_init_lock_offset, init_lock);
1323 }
1324
1325 objArrayOop java_lang_Class::signers(oop java_class) {
1326 assert(_signers_offset != 0, "must be set");
1327 return (objArrayOop)java_class->obj_field(_signers_offset);
1328 }
1329 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1330 assert(_signers_offset != 0, "must be set");
1331 java_class->obj_field_put(_signers_offset, (oop)signers);
1332 }
1333
1334
1335 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1336 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1337 if (_class_loader_offset != 0) {
1338 java_class->obj_field_put(_class_loader_offset, loader);
1339 }
1340 }
1341
1342 oop java_lang_Class::class_loader(oop java_class) {
1343 assert(_class_loader_offset != 0, "must be set");
1344 return java_class->obj_field(_class_loader_offset);
1345 }
1346
1347 oop java_lang_Class::module(oop java_class) {
1348 assert(_module_offset != 0, "must be set");
1349 return java_class->obj_field(_module_offset);
1350 }
1351
1352 void java_lang_Class::set_module(oop java_class, oop module) {
1353 assert(_module_offset != 0, "must be set");
1354 java_class->obj_field_put(_module_offset, module);
1355 }
1356
1357 oop java_lang_Class::name(Handle java_class, TRAPS) {
1358 assert(_name_offset != 0, "must be set");
1359 oop o = java_class->obj_field(_name_offset);
1360 if (o == NULL) {
1361 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1362 java_class->obj_field_put(_name_offset, o);
1363 }
1364 return o;
1365 }
1366
1367 oop java_lang_Class::source_file(oop java_class) {
1368 assert(_source_file_offset != 0, "must be set");
1369 return java_class->obj_field(_source_file_offset);
1370 }
1371
1372 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1373 assert(_source_file_offset != 0, "must be set");
1374 java_class->obj_field_put(_source_file_offset, source_file);
1375 }
1376
1377 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1378 // This should be improved by adding a field at the Java level or by
1379 // introducing a new VM klass (see comment in ClassFileParser)
1380 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1381 if (type != T_VOID) {
1382 Klass* aklass = Universe::typeArrayKlassObj(type);
1383 assert(aklass != NULL, "correct bootstrap");
1384 release_set_array_klass(java_class, aklass);
1385 }
1386 #ifdef ASSERT
1387 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1388 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1389 #endif
1390 return java_class;
1391 }
1392
1393
1394 Klass* java_lang_Class::as_Klass(oop java_class) {
1395 //%note memory_2
1396 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1397 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1398 assert(k == NULL || k->is_klass(), "type check");
1399 return k;
1400 }
1401
1402 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1403 //%note memory_2
1404 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1405 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1406 assert(k == NULL || k->is_klass(), "type check");
1407 return k;
1408 }
1409
1410
1411 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1412 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1413 java_class->metadata_field_put(_klass_offset, klass);
1414 }
1415
1416
1417 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1418 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1419 Symbol* name = NULL;
1420 bool is_instance = false;
1421 if (is_primitive(java_class)) {
1422 name = vmSymbols::type_signature(primitive_type(java_class));
1423 } else {
1424 Klass* k = as_Klass(java_class);
1425 is_instance = k->is_instance_klass();
1426 name = k->name();
1427 }
1428 if (name == NULL) {
1429 st->print("<null>");
1430 return;
1431 }
1432 if (is_instance) st->print("L");
1433 st->write((char*) name->base(), (int) name->utf8_length());
1434 if (is_instance) st->print(";");
1435 }
1436
1437 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1438 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1439 Symbol* name;
1440 if (is_primitive(java_class)) {
1441 name = vmSymbols::type_signature(primitive_type(java_class));
1442 // Because this can create a new symbol, the caller has to decrement
1443 // the refcount, so make adjustment here and below for symbols returned
1444 // that are not created or incremented due to a successful lookup.
1445 name->increment_refcount();
1446 } else {
1447 Klass* k = as_Klass(java_class);
1448 if (!k->is_instance_klass()) {
1449 name = k->name();
1450 name->increment_refcount();
1451 } else {
1452 ResourceMark rm;
1453 const char* sigstr = k->signature_name();
1454 int siglen = (int) strlen(sigstr);
1455 if (!intern_if_not_found) {
1456 name = SymbolTable::probe(sigstr, siglen);
1457 } else {
1458 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1459 }
1460 }
1461 }
1462 return name;
1463 }
1464
1465 // Returns the Java name for this Java mirror (Resource allocated)
1466 // See Klass::external_name().
1467 // For primitive type Java mirrors, its type name is returned.
1468 const char* java_lang_Class::as_external_name(oop java_class) {
1469 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1470 const char* name = NULL;
1471 if (is_primitive(java_class)) {
1472 name = type2name(primitive_type(java_class));
1473 } else {
1474 name = as_Klass(java_class)->external_name();
1475 }
1476 if (name == NULL) {
1477 name = "<null>";
1478 }
1479 return name;
1480 }
1481
1482 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1483 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1484 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1485 return k;
1486 }
1487
1488
1489 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1490 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1491 java_class->release_metadata_field_put(_array_klass_offset, klass);
1492 }
1493
1494
1495 BasicType java_lang_Class::primitive_type(oop java_class) {
1496 assert(java_lang_Class::is_primitive(java_class), "just checking");
1497 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1498 BasicType type = T_VOID;
1499 if (ak != NULL) {
1500 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1501 type = ArrayKlass::cast(ak)->element_type();
1502 } else {
1503 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1504 }
1505 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1506 return type;
1507 }
1508
1509 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1510 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1511 if (is_primitive(java_class)) {
1512 if (reference_klass != NULL)
1513 (*reference_klass) = NULL;
1514 return primitive_type(java_class);
1515 } else {
1516 if (reference_klass != NULL)
1517 (*reference_klass) = as_Klass(java_class);
1518 return T_OBJECT;
1519 }
1520 }
1521
1522
1523 oop java_lang_Class::primitive_mirror(BasicType t) {
1524 oop mirror = Universe::java_mirror(t);
1525 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1526 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1527 return mirror;
1528 }
1529
1530 bool java_lang_Class::offsets_computed = false;
1531 int java_lang_Class::classRedefinedCount_offset = -1;
1532
1533 #define CLASS_FIELDS_DO(macro) \
1534 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1535 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1536 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1537 macro(_module_offset, k, "module", module_signature, false); \
1538 macro(_name_offset, k, "name", string_signature, false); \
1539
1540 void java_lang_Class::compute_offsets() {
1541 if (offsets_computed) {
1542 return;
1543 }
1544
1545 offsets_computed = true;
1546
1547 InstanceKlass* k = SystemDictionary::Class_klass();
1548 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1549
1550 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1551 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1552 // GC treats them the same.
1553 _init_lock_offset = _component_mirror_offset;
1554
1555 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1556 }
1557
1558 #if INCLUDE_CDS
1559 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1560 f->do_u4((u4*)&offsets_computed);
1561 f->do_u4((u4*)&_init_lock_offset);
1562
1563 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1564
1565 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1566 }
1567 #endif
1568
1569 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1570 if (classRedefinedCount_offset == -1) {
1571 // If we don't have an offset for it then just return -1 as a marker.
1572 return -1;
1573 }
1574
1575 return the_class_mirror->int_field(classRedefinedCount_offset);
1576 }
1577
1578 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1579 if (classRedefinedCount_offset == -1) {
1580 // If we don't have an offset for it then nothing to set.
1581 return;
1582 }
1583
1584 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1585 }
1586
1587
1588 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1589 // platform thread structure, and a eetop offset which was used for thread
1590 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1591 // merged, so in the HotSpot VM we just use the eetop field for the thread
1592 // instead of the privateInfo_offset.
1593 //
1594 // Note: The stackSize field is only present starting in 1.4.
1595
1596 int java_lang_Thread::_name_offset = 0;
1597 int java_lang_Thread::_group_offset = 0;
1598 int java_lang_Thread::_contextClassLoader_offset = 0;
1599 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1600 int java_lang_Thread::_priority_offset = 0;
1601 int java_lang_Thread::_eetop_offset = 0;
1602 int java_lang_Thread::_daemon_offset = 0;
1603 int java_lang_Thread::_stillborn_offset = 0;
1604 int java_lang_Thread::_stackSize_offset = 0;
1605 int java_lang_Thread::_tid_offset = 0;
1606 int java_lang_Thread::_thread_status_offset = 0;
1607 int java_lang_Thread::_park_blocker_offset = 0;
1608 int java_lang_Thread::_park_event_offset = 0 ;
1609
1610 #define THREAD_FIELDS_DO(macro) \
1611 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1612 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1613 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1614 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1615 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1616 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1617 macro(_eetop_offset, k, "eetop", long_signature, false); \
1618 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1619 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1620 macro(_tid_offset, k, "tid", long_signature, false); \
1621 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1622 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1623 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false)
1624
1625 void java_lang_Thread::compute_offsets() {
1626 assert(_group_offset == 0, "offsets should be initialized only once");
1627
1628 InstanceKlass* k = SystemDictionary::Thread_klass();
1629 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1630 }
1631
1632 #if INCLUDE_CDS
1633 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1634 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1635 }
1636 #endif
1637
1638 JavaThread* java_lang_Thread::thread(oop java_thread) {
1639 return (JavaThread*)java_thread->address_field(_eetop_offset);
1640 }
1641
1642
1643 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1644 java_thread->address_field_put(_eetop_offset, (address)thread);
1645 }
1646
1647
1648 oop java_lang_Thread::name(oop java_thread) {
1649 return java_thread->obj_field(_name_offset);
1650 }
1651
1652
1653 void java_lang_Thread::set_name(oop java_thread, oop name) {
1654 java_thread->obj_field_put(_name_offset, name);
1655 }
1656
1657
1658 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1659 return (ThreadPriority)java_thread->int_field(_priority_offset);
1660 }
1661
1662
1663 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1664 java_thread->int_field_put(_priority_offset, priority);
1665 }
1666
1667
1668 oop java_lang_Thread::threadGroup(oop java_thread) {
1669 return java_thread->obj_field(_group_offset);
1670 }
1671
1672
1673 bool java_lang_Thread::is_stillborn(oop java_thread) {
1674 return java_thread->bool_field(_stillborn_offset) != 0;
1675 }
1676
1677
1678 // We never have reason to turn the stillborn bit off
1679 void java_lang_Thread::set_stillborn(oop java_thread) {
1680 java_thread->bool_field_put(_stillborn_offset, true);
1681 }
1682
1683
1684 bool java_lang_Thread::is_alive(oop java_thread) {
1685 JavaThread* thr = java_lang_Thread::thread(java_thread);
1686 return (thr != NULL);
1687 }
1688
1689
1690 bool java_lang_Thread::is_daemon(oop java_thread) {
1691 return java_thread->bool_field(_daemon_offset) != 0;
1692 }
1693
1694
1695 void java_lang_Thread::set_daemon(oop java_thread) {
1696 java_thread->bool_field_put(_daemon_offset, true);
1697 }
1698
1699 oop java_lang_Thread::context_class_loader(oop java_thread) {
1700 return java_thread->obj_field(_contextClassLoader_offset);
1701 }
1702
1703 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1704 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1705 }
1706
1707
1708 jlong java_lang_Thread::stackSize(oop java_thread) {
1709 if (_stackSize_offset > 0) {
1710 return java_thread->long_field(_stackSize_offset);
1711 } else {
1712 return 0;
1713 }
1714 }
1715
1716 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1717 void java_lang_Thread::set_thread_status(oop java_thread,
1718 java_lang_Thread::ThreadStatus status) {
1719 // The threadStatus is only present starting in 1.5
1720 if (_thread_status_offset > 0) {
1721 java_thread->int_field_put(_thread_status_offset, status);
1722 }
1723 }
1724
1725 // Read thread status value from threadStatus field in java.lang.Thread java class.
1726 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1727 // Make sure the caller is operating on behalf of the VM or is
1728 // running VM code (state == _thread_in_vm).
1729 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1730 JavaThread::current()->thread_state() == _thread_in_vm,
1731 "Java Thread is not running in vm");
1732 // The threadStatus is only present starting in 1.5
1733 if (_thread_status_offset > 0) {
1734 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1735 } else {
1736 // All we can easily figure out is if it is alive, but that is
1737 // enough info for a valid unknown status.
1738 // These aren't restricted to valid set ThreadStatus values, so
1739 // use JVMTI values and cast.
1740 JavaThread* thr = java_lang_Thread::thread(java_thread);
1741 if (thr == NULL) {
1742 // the thread hasn't run yet or is in the process of exiting
1743 return NEW;
1744 }
1745 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1746 }
1747 }
1748
1749
1750 jlong java_lang_Thread::thread_id(oop java_thread) {
1751 // The thread ID field is only present starting in 1.5
1752 if (_tid_offset > 0) {
1753 return java_thread->long_field(_tid_offset);
1754 } else {
1755 return 0;
1756 }
1757 }
1758
1759 oop java_lang_Thread::park_blocker(oop java_thread) {
1760 assert(JDK_Version::current().supports_thread_park_blocker() &&
1761 _park_blocker_offset != 0, "Must support parkBlocker field");
1762
1763 if (_park_blocker_offset > 0) {
1764 return java_thread->obj_field(_park_blocker_offset);
1765 }
1766
1767 return NULL;
1768 }
1769
1770 jlong java_lang_Thread::park_event(oop java_thread) {
1771 if (_park_event_offset > 0) {
1772 return java_thread->long_field(_park_event_offset);
1773 }
1774 return 0;
1775 }
1776
1777 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1778 if (_park_event_offset > 0) {
1779 java_thread->long_field_put(_park_event_offset, ptr);
1780 return true;
1781 }
1782 return false;
1783 }
1784
1785
1786 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1787 assert(_thread_status_offset != 0, "Must have thread status");
1788 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1789 switch (status) {
1790 case NEW : return "NEW";
1791 case RUNNABLE : return "RUNNABLE";
1792 case SLEEPING : return "TIMED_WAITING (sleeping)";
1793 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1794 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1795 case PARKED : return "WAITING (parking)";
1796 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1797 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1798 case TERMINATED : return "TERMINATED";
1799 default : return "UNKNOWN";
1800 };
1801 }
1802 int java_lang_ThreadGroup::_parent_offset = 0;
1803 int java_lang_ThreadGroup::_name_offset = 0;
1804 int java_lang_ThreadGroup::_threads_offset = 0;
1805 int java_lang_ThreadGroup::_groups_offset = 0;
1806 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1807 int java_lang_ThreadGroup::_destroyed_offset = 0;
1808 int java_lang_ThreadGroup::_daemon_offset = 0;
1809 int java_lang_ThreadGroup::_nthreads_offset = 0;
1810 int java_lang_ThreadGroup::_ngroups_offset = 0;
1811
1812 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1813 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1814 return java_thread_group->obj_field(_parent_offset);
1815 }
1816
1817 // ("name as oop" accessor is not necessary)
1818
1819 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1820 oop name = java_thread_group->obj_field(_name_offset);
1821 // ThreadGroup.name can be null
1822 if (name != NULL) {
1823 return java_lang_String::as_utf8_string(name);
1824 }
1825 return NULL;
1826 }
1827
1828 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1829 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1830 return java_thread_group->int_field(_nthreads_offset);
1831 }
1832
1833 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1834 oop threads = java_thread_group->obj_field(_threads_offset);
1835 assert(threads != NULL, "threadgroups should have threads");
1836 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1837 return objArrayOop(threads);
1838 }
1839
1840 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1841 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1842 return java_thread_group->int_field(_ngroups_offset);
1843 }
1844
1845 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1846 oop groups = java_thread_group->obj_field(_groups_offset);
1847 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1848 return objArrayOop(groups);
1849 }
1850
1851 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1852 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1853 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1854 }
1855
1856 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1857 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1858 return java_thread_group->bool_field(_destroyed_offset) != 0;
1859 }
1860
1861 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1862 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1863 return java_thread_group->bool_field(_daemon_offset) != 0;
1864 }
1865
1866 #define THREADGROUP_FIELDS_DO(macro) \
1867 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1868 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1869 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1870 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1871 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1872 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1873 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1874 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1875 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1876
1877 void java_lang_ThreadGroup::compute_offsets() {
1878 assert(_parent_offset == 0, "offsets should be initialized only once");
1879
1880 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1881 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1882 }
1883
1884 #if INCLUDE_CDS
1885 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1886 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1887 }
1888 #endif
1889
1890 #define THROWABLE_FIELDS_DO(macro) \
1891 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1892 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1893 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1894 macro(depth_offset, k, "depth", int_signature, false); \
1895 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1896
1897 void java_lang_Throwable::compute_offsets() {
1898 InstanceKlass* k = SystemDictionary::Throwable_klass();
1899 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1900 }
1901
1902 #if INCLUDE_CDS
1903 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1904 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1905 }
1906 #endif
1907
1908 oop java_lang_Throwable::unassigned_stacktrace() {
1909 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1910 oop base = ik->static_field_base_raw();
1911 return base->obj_field(static_unassigned_stacktrace_offset);
1912 }
1913
1914 oop java_lang_Throwable::backtrace(oop throwable) {
1915 return throwable->obj_field_acquire(backtrace_offset);
1916 }
1917
1918
1919 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1920 throwable->release_obj_field_put(backtrace_offset, value);
1921 }
1922
1923 int java_lang_Throwable::depth(oop throwable) {
1924 return throwable->int_field(depth_offset);
1925 }
1926
1927 void java_lang_Throwable::set_depth(oop throwable, int value) {
1928 throwable->int_field_put(depth_offset, value);
1929 }
1930
1931 oop java_lang_Throwable::message(oop throwable) {
1932 return throwable->obj_field(detailMessage_offset);
1933 }
1934
1935
1936 // Return Symbol for detailed_message or NULL
1937 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1938 PRESERVE_EXCEPTION_MARK; // Keep original exception
1939 oop detailed_message = java_lang_Throwable::message(throwable);
1940 if (detailed_message != NULL) {
1941 return java_lang_String::as_symbol(detailed_message, THREAD);
1942 }
1943 return NULL;
1944 }
1945
1946 void java_lang_Throwable::set_message(oop throwable, oop value) {
1947 throwable->obj_field_put(detailMessage_offset, value);
1948 }
1949
1950
1951 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1952 throwable->obj_field_put(stackTrace_offset, st_element_array);
1953 }
1954
1955 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1956 set_stacktrace(throwable, NULL);
1957 }
1958
1959
1960 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1961 ResourceMark rm;
1962 Klass* k = throwable->klass();
1963 assert(k != NULL, "just checking");
1964 st->print("%s", k->external_name());
1965 oop msg = message(throwable);
1966 if (msg != NULL) {
1967 st->print(": %s", java_lang_String::as_utf8_string(msg));
1968 }
1969 }
1970
1971 // After this many redefines, the stack trace is unreliable.
1972 const int MAX_VERSION = USHRT_MAX;
1973
1974 static inline bool version_matches(Method* method, int version) {
1975 assert(version < MAX_VERSION, "version is too big");
1976 return method != NULL && (method->constants()->version() == version);
1977 }
1978
1979
1980 // This class provides a simple wrapper over the internal structure of
1981 // exception backtrace to insulate users of the backtrace from needing
1982 // to know what it looks like.
1983 class BacktraceBuilder: public StackObj {
1984 friend class BacktraceIterator;
1985 private:
1986 Handle _backtrace;
1987 objArrayOop _head;
1988 typeArrayOop _methods;
1989 typeArrayOop _bcis;
1990 objArrayOop _mirrors;
1991 typeArrayOop _names; // needed to insulate method name against redefinition
1992 int _index;
1993 NoSafepointVerifier _nsv;
1994
1995 enum {
1996 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1997 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1998 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1999 trace_names_offset = java_lang_Throwable::trace_names_offset,
2000 trace_next_offset = java_lang_Throwable::trace_next_offset,
2001 trace_size = java_lang_Throwable::trace_size,
2002 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2003 };
2004
2005 // get info out of chunks
2006 static typeArrayOop get_methods(objArrayHandle chunk) {
2007 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2008 assert(methods != NULL, "method array should be initialized in backtrace");
2009 return methods;
2010 }
2011 static typeArrayOop get_bcis(objArrayHandle chunk) {
2012 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2013 assert(bcis != NULL, "bci array should be initialized in backtrace");
2014 return bcis;
2015 }
2016 static objArrayOop get_mirrors(objArrayHandle chunk) {
2017 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2018 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2019 return mirrors;
2020 }
2021 static typeArrayOop get_names(objArrayHandle chunk) {
2022 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2023 assert(names != NULL, "names array should be initialized in backtrace");
2024 return names;
2025 }
2026
2027 public:
2028
2029 // constructor for new backtrace
2030 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2031 expand(CHECK);
2032 _backtrace = Handle(THREAD, _head);
2033 _index = 0;
2034 }
2035
2036 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2037 _methods = get_methods(backtrace);
2038 _bcis = get_bcis(backtrace);
2039 _mirrors = get_mirrors(backtrace);
2040 _names = get_names(backtrace);
2041 assert(_methods->length() == _bcis->length() &&
2042 _methods->length() == _mirrors->length() &&
2043 _mirrors->length() == _names->length(),
2044 "method and source information arrays should match");
2045
2046 // head is the preallocated backtrace
2047 _head = backtrace();
2048 _backtrace = Handle(thread, _head);
2049 _index = 0;
2050 }
2051
2052 void expand(TRAPS) {
2053 objArrayHandle old_head(THREAD, _head);
2054 PauseNoSafepointVerifier pnsv(&_nsv);
2055
2056 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2057 objArrayHandle new_head(THREAD, head);
2058
2059 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2060 typeArrayHandle new_methods(THREAD, methods);
2061
2062 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2063 typeArrayHandle new_bcis(THREAD, bcis);
2064
2065 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2066 objArrayHandle new_mirrors(THREAD, mirrors);
2067
2068 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2069 typeArrayHandle new_names(THREAD, names);
2070
2071 if (!old_head.is_null()) {
2072 old_head->obj_at_put(trace_next_offset, new_head());
2073 }
2074 new_head->obj_at_put(trace_methods_offset, new_methods());
2075 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2076 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2077 new_head->obj_at_put(trace_names_offset, new_names());
2078
2079 _head = new_head();
2080 _methods = new_methods();
2081 _bcis = new_bcis();
2082 _mirrors = new_mirrors();
2083 _names = new_names();
2084 _index = 0;
2085 }
2086
2087 oop backtrace() {
2088 return _backtrace();
2089 }
2090
2091 inline void push(Method* method, int bci, TRAPS) {
2092 // Smear the -1 bci to 0 since the array only holds unsigned
2093 // shorts. The later line number lookup would just smear the -1
2094 // to a 0 even if it could be recorded.
2095 if (bci == SynchronizationEntryBCI) bci = 0;
2096
2097 if (_index >= trace_chunk_size) {
2098 methodHandle mhandle(THREAD, method);
2099 expand(CHECK);
2100 method = mhandle();
2101 }
2102
2103 _methods->ushort_at_put(_index, method->orig_method_idnum());
2104 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2105
2106 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2107 // klass owning the symbols alive so their refcounts aren't decremented.
2108 Symbol* name = method->name();
2109 _names->symbol_at_put(_index, name);
2110
2111 // We need to save the mirrors in the backtrace to keep the class
2112 // from being unloaded while we still have this stack trace.
2113 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2114 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2115 _index++;
2116 }
2117
2118 };
2119
2120 struct BacktraceElement : public StackObj {
2121 int _method_id;
2122 int _bci;
2123 int _version;
2124 Symbol* _name;
2125 Handle _mirror;
2126 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2127 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2128 };
2129
2130 class BacktraceIterator : public StackObj {
2131 int _index;
2132 objArrayHandle _result;
2133 objArrayHandle _mirrors;
2134 typeArrayHandle _methods;
2135 typeArrayHandle _bcis;
2136 typeArrayHandle _names;
2137
2138 void init(objArrayHandle result, Thread* thread) {
2139 // Get method id, bci, version and mirror from chunk
2140 _result = result;
2141 if (_result.not_null()) {
2142 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2143 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2144 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2145 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2146 _index = 0;
2147 }
2148 }
2149 public:
2150 BacktraceIterator(objArrayHandle result, Thread* thread) {
2151 init(result, thread);
2152 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2153 }
2154
2155 BacktraceElement next(Thread* thread) {
2156 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2157 _methods->ushort_at(_index),
2158 Backtrace::version_at(_bcis->int_at(_index)),
2159 Backtrace::bci_at(_bcis->int_at(_index)),
2160 _names->symbol_at(_index));
2161 _index++;
2162
2163 if (_index >= java_lang_Throwable::trace_chunk_size) {
2164 int next_offset = java_lang_Throwable::trace_next_offset;
2165 // Get next chunk
2166 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2167 init(result, thread);
2168 }
2169 return e;
2170 }
2171
2172 bool repeat() {
2173 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2174 }
2175 };
2176
2177
2178 // Print stack trace element to resource allocated buffer
2179 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2180 int version, int bci, Symbol* name) {
2181 ResourceMark rm;
2182
2183 // Get strings and string lengths
2184 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2185 const char* klass_name = holder->external_name();
2186 int buf_len = (int)strlen(klass_name);
2187
2188 char* method_name = name->as_C_string();
2189 buf_len += (int)strlen(method_name);
2190
2191 char* source_file_name = NULL;
2192 Symbol* source = Backtrace::get_source_file_name(holder, version);
2193 if (source != NULL) {
2194 source_file_name = source->as_C_string();
2195 buf_len += (int)strlen(source_file_name);
2196 }
2197
2198 char *module_name = NULL, *module_version = NULL;
2199 ModuleEntry* module = holder->module();
2200 if (module->is_named()) {
2201 module_name = module->name()->as_C_string();
2202 buf_len += (int)strlen(module_name);
2203 if (module->version() != NULL) {
2204 module_version = module->version()->as_C_string();
2205 buf_len += (int)strlen(module_version);
2206 }
2207 }
2208
2209 // Allocate temporary buffer with extra space for formatting and line number
2210 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2211
2212 // Print stack trace line in buffer
2213 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2214
2215 // Print module information
2216 if (module_name != NULL) {
2217 if (module_version != NULL) {
2218 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2219 } else {
2220 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2221 }
2222 }
2223
2224 // The method can be NULL if the requested class version is gone
2225 Method* method = holder->method_with_orig_idnum(method_id, version);
2226 if (!version_matches(method, version)) {
2227 strcat(buf, "Redefined)");
2228 } else {
2229 int line_number = Backtrace::get_line_number(method, bci);
2230 if (line_number == -2) {
2231 strcat(buf, "Native Method)");
2232 } else {
2233 if (source_file_name != NULL && (line_number != -1)) {
2234 // Sourcename and linenumber
2235 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2236 } else if (source_file_name != NULL) {
2237 // Just sourcename
2238 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2239 } else {
2240 // Neither sourcename nor linenumber
2241 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2242 }
2243 CompiledMethod* nm = method->code();
2244 if (WizardMode && nm != NULL) {
2245 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2246 }
2247 }
2248 }
2249
2250 st->print_cr("%s", buf);
2251 }
2252
2253 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2254 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2255 int method_id = method->orig_method_idnum();
2256 int version = method->constants()->version();
2257 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2258 }
2259
2260 /**
2261 * Print the throwable message and its stack trace plus all causes by walking the
2262 * cause chain. The output looks the same as of Throwable.printStackTrace().
2263 */
2264 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2265 // First, print the message.
2266 print(throwable(), st);
2267 st->cr();
2268
2269 // Now print the stack trace.
2270 Thread* THREAD = Thread::current();
2271 while (throwable.not_null()) {
2272 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2273 if (result.is_null()) {
2274 st->print_raw_cr("\t<<no stack trace available>>");
2275 return;
2276 }
2277 BacktraceIterator iter(result, THREAD);
2278
2279 while (iter.repeat()) {
2280 BacktraceElement bte = iter.next(THREAD);
2281 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2282 }
2283 {
2284 // Call getCause() which doesn't necessarily return the _cause field.
2285 EXCEPTION_MARK;
2286 JavaValue cause(T_OBJECT);
2287 JavaCalls::call_virtual(&cause,
2288 throwable,
2289 throwable->klass(),
2290 vmSymbols::getCause_name(),
2291 vmSymbols::void_throwable_signature(),
2292 THREAD);
2293 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2294 if (HAS_PENDING_EXCEPTION) {
2295 CLEAR_PENDING_EXCEPTION;
2296 throwable = Handle();
2297 } else {
2298 throwable = Handle(THREAD, (oop) cause.get_jobject());
2299 if (throwable.not_null()) {
2300 st->print("Caused by: ");
2301 print(throwable(), st);
2302 st->cr();
2303 }
2304 }
2305 }
2306 }
2307 }
2308
2309 /**
2310 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2311 */
2312 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2313 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2314 JavaValue result(T_VOID);
2315 JavaCalls::call_virtual(&result,
2316 throwable,
2317 SystemDictionary::Throwable_klass(),
2318 vmSymbols::printStackTrace_name(),
2319 vmSymbols::void_method_signature(),
2320 THREAD);
2321 }
2322
2323 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2324 if (!StackTraceInThrowable) return;
2325 ResourceMark rm(THREAD);
2326
2327 // Start out by clearing the backtrace for this object, in case the VM
2328 // runs out of memory while allocating the stack trace
2329 set_backtrace(throwable(), NULL);
2330 // Clear lazily constructed Java level stacktrace if refilling occurs
2331 // This is unnecessary in 1.7+ but harmless
2332 clear_stacktrace(throwable());
2333
2334 int max_depth = MaxJavaStackTraceDepth;
2335 JavaThread* thread = (JavaThread*)THREAD;
2336
2337 BacktraceBuilder bt(CHECK);
2338
2339 // If there is no Java frame just return the method that was being called
2340 // with bci 0
2341 if (!thread->has_last_Java_frame()) {
2342 if (max_depth >= 1 && method() != NULL) {
2343 bt.push(method(), 0, CHECK);
2344 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2345 set_depth(throwable(), 1);
2346 set_backtrace(throwable(), bt.backtrace());
2347 }
2348 return;
2349 }
2350
2351 // Instead of using vframe directly, this version of fill_in_stack_trace
2352 // basically handles everything by hand. This significantly improved the
2353 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2354 // See bug 6333838 for more details.
2355 // The "ASSERT" here is to verify this method generates the exactly same stack
2356 // trace as utilizing vframe.
2357 #ifdef ASSERT
2358 vframeStream st(thread);
2359 methodHandle st_method(THREAD, st.method());
2360 #endif
2361 int total_count = 0;
2362 RegisterMap map(thread, false);
2363 int decode_offset = 0;
2364 CompiledMethod* nm = NULL;
2365 bool skip_fillInStackTrace_check = false;
2366 bool skip_throwableInit_check = false;
2367 bool skip_hidden = !ShowHiddenFrames;
2368
2369 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2370 Method* method = NULL;
2371 int bci = 0;
2372
2373 // Compiled java method case.
2374 if (decode_offset != 0) {
2375 DebugInfoReadStream stream(nm, decode_offset);
2376 decode_offset = stream.read_int();
2377 method = (Method*)nm->metadata_at(stream.read_int());
2378 bci = stream.read_bci();
2379 } else {
2380 if (fr.is_first_frame()) break;
2381 address pc = fr.pc();
2382 if (fr.is_interpreted_frame()) {
2383 address bcp = fr.interpreter_frame_bcp();
2384 method = fr.interpreter_frame_method();
2385 bci = method->bci_from(bcp);
2386 fr = fr.sender(&map);
2387 } else {
2388 CodeBlob* cb = fr.cb();
2389 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2390 // but non nmethod
2391 fr = fr.sender(&map);
2392 if (cb == NULL || !cb->is_compiled()) {
2393 continue;
2394 }
2395 nm = cb->as_compiled_method();
2396 if (nm->method()->is_native()) {
2397 method = nm->method();
2398 bci = 0;
2399 } else {
2400 PcDesc* pd = nm->pc_desc_at(pc);
2401 decode_offset = pd->scope_decode_offset();
2402 // if decode_offset is not equal to 0, it will execute the
2403 // "compiled java method case" at the beginning of the loop.
2404 continue;
2405 }
2406 }
2407 }
2408 #ifdef ASSERT
2409 assert(st_method() == method && st.bci() == bci,
2410 "Wrong stack trace");
2411 st.next();
2412 // vframeStream::method isn't GC-safe so store off a copy
2413 // of the Method* in case we GC.
2414 if (!st.at_end()) {
2415 st_method = st.method();
2416 }
2417 #endif
2418
2419 // the format of the stacktrace will be:
2420 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2421 // - 0 or more <init> methods for the exception class (skipped)
2422 // - rest of the stack
2423
2424 if (!skip_fillInStackTrace_check) {
2425 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2426 throwable->is_a(method->method_holder())) {
2427 continue;
2428 }
2429 else {
2430 skip_fillInStackTrace_check = true; // gone past them all
2431 }
2432 }
2433 if (!skip_throwableInit_check) {
2434 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2435
2436 // skip <init> methods of the exception class and superclasses
2437 // This is simlar to classic VM.
2438 if (method->name() == vmSymbols::object_initializer_name() &&
2439 throwable->is_a(method->method_holder())) {
2440 continue;
2441 } else {
2442 // there are none or we've seen them all - either way stop checking
2443 skip_throwableInit_check = true;
2444 }
2445 }
2446 if (method->is_hidden()) {
2447 if (skip_hidden) continue;
2448 }
2449 bt.push(method, bci, CHECK);
2450 total_count++;
2451 }
2452
2453 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2454
2455 // Put completed stack trace into throwable object
2456 set_backtrace(throwable(), bt.backtrace());
2457 set_depth(throwable(), total_count);
2458 }
2459
2460 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2461 // No-op if stack trace is disabled
2462 if (!StackTraceInThrowable) {
2463 return;
2464 }
2465
2466 // Disable stack traces for some preallocated out of memory errors
2467 if (!Universe::should_fill_in_stack_trace(throwable)) {
2468 return;
2469 }
2470
2471 PRESERVE_EXCEPTION_MARK;
2472
2473 JavaThread* thread = JavaThread::active();
2474 fill_in_stack_trace(throwable, method, thread);
2475 // ignore exceptions thrown during stack trace filling
2476 CLEAR_PENDING_EXCEPTION;
2477 }
2478
2479 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2480 // Allocate stack trace - backtrace is created but not filled in
2481
2482 // No-op if stack trace is disabled
2483 if (!StackTraceInThrowable) return;
2484 BacktraceBuilder bt(CHECK); // creates a backtrace
2485 set_backtrace(throwable(), bt.backtrace());
2486 }
2487
2488
2489 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2490 // Fill in stack trace into preallocated backtrace (no GC)
2491
2492 // No-op if stack trace is disabled
2493 if (!StackTraceInThrowable) return;
2494
2495 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2496
2497 JavaThread* THREAD = JavaThread::current();
2498
2499 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2500 assert(backtrace.not_null(), "backtrace should have been preallocated");
2501
2502 ResourceMark rm(THREAD);
2503 vframeStream st(THREAD);
2504
2505 BacktraceBuilder bt(THREAD, backtrace);
2506
2507 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2508 // methods as preallocated errors aren't created by "java" code.
2509
2510 // fill in as much stack trace as possible
2511 int chunk_count = 0;
2512 for (;!st.at_end(); st.next()) {
2513 bt.push(st.method(), st.bci(), CHECK);
2514 chunk_count++;
2515
2516 // Bail-out for deep stacks
2517 if (chunk_count >= trace_chunk_size) break;
2518 }
2519 set_depth(throwable(), chunk_count);
2520 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2521
2522 // We support the Throwable immutability protocol defined for Java 7.
2523 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2524 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2525 }
2526
2527 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2528 objArrayHandle stack_trace_array_h, TRAPS) {
2529
2530 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2531 THROW(vmSymbols::java_lang_NullPointerException());
2532 }
2533
2534 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2535
2536 if (stack_trace_array_h->length() != depth(throwable())) {
2537 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2538 }
2539
2540 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2541 BacktraceIterator iter(result, THREAD);
2542
2543 int index = 0;
2544 while (iter.repeat()) {
2545 BacktraceElement bte = iter.next(THREAD);
2546
2547 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2548
2549 if (stack_trace_element.is_null()) {
2550 THROW(vmSymbols::java_lang_NullPointerException());
2551 }
2552
2553 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2554 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2555
2556 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2557 method,
2558 bte._version,
2559 bte._bci,
2560 bte._name, CHECK);
2561 }
2562 }
2563
2564 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2565 // Allocate java.lang.StackTraceElement instance
2566 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2567 assert(k != NULL, "must be loaded in 1.4+");
2568 if (k->should_be_initialized()) {
2569 k->initialize(CHECK_0);
2570 }
2571
2572 Handle element = k->allocate_instance_handle(CHECK_0);
2573
2574 int version = method->constants()->version();
2575 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2576 return element();
2577 }
2578
2579 void java_lang_StackTraceElement::fill_in(Handle element,
2580 InstanceKlass* holder, const methodHandle& method,
2581 int version, int bci, Symbol* name, TRAPS) {
2582 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2583
2584 ResourceMark rm(THREAD);
2585 HandleMark hm(THREAD);
2586
2587 // Fill in class name
2588 Handle java_class(THREAD, holder->java_mirror());
2589 oop classname = java_lang_Class::name(java_class, CHECK);
2590 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2591 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2592
2593 oop loader = holder->class_loader();
2594 if (loader != NULL) {
2595 oop loader_name = java_lang_ClassLoader::name(loader);
2596 if (loader_name != NULL)
2597 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2598 }
2599
2600 // Fill in method name
2601 oop methodname = StringTable::intern(name, CHECK);
2602 java_lang_StackTraceElement::set_methodName(element(), methodname);
2603
2604 // Fill in module name and version
2605 ModuleEntry* module = holder->module();
2606 if (module->is_named()) {
2607 oop module_name = StringTable::intern(module->name(), CHECK);
2608 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2609 oop module_version;
2610 if (module->version() != NULL) {
2611 module_version = StringTable::intern(module->version(), CHECK);
2612 } else {
2613 module_version = NULL;
2614 }
2615 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2616 }
2617
2618 if (method() == NULL || !version_matches(method(), version)) {
2619 // The method was redefined, accurate line number information isn't available
2620 java_lang_StackTraceElement::set_fileName(element(), NULL);
2621 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2622 } else {
2623 // Fill in source file name and line number.
2624 Symbol* source = Backtrace::get_source_file_name(holder, version);
2625 oop source_file = java_lang_Class::source_file(java_class());
2626 if (source != NULL) {
2627 // Class was not redefined. We can trust its cache if set,
2628 // else we have to initialize it.
2629 if (source_file == NULL) {
2630 source_file = StringTable::intern(source, CHECK);
2631 java_lang_Class::set_source_file(java_class(), source_file);
2632 }
2633 } else {
2634 // Class was redefined. Dump the cache if it was set.
2635 if (source_file != NULL) {
2636 source_file = NULL;
2637 java_lang_Class::set_source_file(java_class(), source_file);
2638 }
2639 if (ShowHiddenFrames) {
2640 source = vmSymbols::unknown_class_name();
2641 source_file = StringTable::intern(source, CHECK);
2642 }
2643 }
2644 java_lang_StackTraceElement::set_fileName(element(), source_file);
2645
2646 int line_number = Backtrace::get_line_number(method, bci);
2647 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2648 }
2649 }
2650
2651 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2652 HandleMark hm(THREAD);
2653 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2654 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2655 // we should expand MemberName::name when Throwable uses StackTrace
2656 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2657 return method;
2658 }
2659
2660 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2661 // set Method* or mid/cpref
2662 HandleMark hm(THREAD);
2663 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2664 InstanceKlass* ik = method->method_holder();
2665 CallInfo info(method(), ik, CHECK);
2666 MethodHandles::init_method_MemberName(mname, info);
2667 // set bci
2668 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2669 // method may be redefined; store the version
2670 int version = method->constants()->version();
2671 assert((jushort)version == version, "version should be short");
2672 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2673 }
2674
2675 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2676 ResourceMark rm(THREAD);
2677 HandleMark hm(THREAD);
2678 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2679 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2680 InstanceKlass* holder = InstanceKlass::cast(clazz);
2681 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2682
2683 short version = stackFrame->short_field(_version_offset);
2684 short bci = stackFrame->short_field(_bci_offset);
2685 Symbol* name = method->name();
2686 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2687 }
2688
2689 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2690 macro(_memberName_offset, k, "memberName", object_signature, false); \
2691 macro(_bci_offset, k, "bci", short_signature, false)
2692
2693 void java_lang_StackFrameInfo::compute_offsets() {
2694 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2695 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2696 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2697 }
2698
2699 #if INCLUDE_CDS
2700 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2701 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2702 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2703 }
2704 #endif
2705
2706 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2707 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2708 macro(_locals_offset, k, "locals", object_array_signature, false); \
2709 macro(_operands_offset, k, "operands", object_array_signature, false); \
2710 macro(_mode_offset, k, "mode", int_signature, false)
2711
2712 void java_lang_LiveStackFrameInfo::compute_offsets() {
2713 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2714 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2715 }
2716
2717 #if INCLUDE_CDS
2718 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2719 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2720 }
2721 #endif
2722
2723 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2724 macro(override_offset, k, "override", bool_signature, false)
2725
2726 void java_lang_reflect_AccessibleObject::compute_offsets() {
2727 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2728 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2729 }
2730
2731 #if INCLUDE_CDS
2732 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2733 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2734 }
2735 #endif
2736
2737 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2738 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2739 return (jboolean) reflect->bool_field(override_offset);
2740 }
2741
2742 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2743 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2744 reflect->bool_field_put(override_offset, (int) value);
2745 }
2746
2747 #define METHOD_FIELDS_DO(macro) \
2748 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2749 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2750 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2751 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2752 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2753 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2754 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2755 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2756 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2757 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2758 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2759
2760 void java_lang_reflect_Method::compute_offsets() {
2761 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2762 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2763 }
2764
2765 #if INCLUDE_CDS
2766 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2767 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2768 }
2769 #endif
2770
2771 Handle java_lang_reflect_Method::create(TRAPS) {
2772 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2773 Klass* klass = SystemDictionary::reflect_Method_klass();
2774 // This class is eagerly initialized during VM initialization, since we keep a refence
2775 // to one of the methods
2776 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2777 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2778 }
2779
2780 oop java_lang_reflect_Method::clazz(oop reflect) {
2781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2782 return reflect->obj_field(clazz_offset);
2783 }
2784
2785 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2786 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2787 reflect->obj_field_put(clazz_offset, value);
2788 }
2789
2790 int java_lang_reflect_Method::slot(oop reflect) {
2791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2792 return reflect->int_field(slot_offset);
2793 }
2794
2795 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2796 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2797 reflect->int_field_put(slot_offset, value);
2798 }
2799
2800 void java_lang_reflect_Method::set_name(oop method, oop value) {
2801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2802 method->obj_field_put(name_offset, value);
2803 }
2804
2805 oop java_lang_reflect_Method::return_type(oop method) {
2806 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2807 return method->obj_field(returnType_offset);
2808 }
2809
2810 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2811 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2812 method->obj_field_put(returnType_offset, value);
2813 }
2814
2815 oop java_lang_reflect_Method::parameter_types(oop method) {
2816 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2817 return method->obj_field(parameterTypes_offset);
2818 }
2819
2820 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2821 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2822 method->obj_field_put(parameterTypes_offset, value);
2823 }
2824
2825 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2826 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2827 method->obj_field_put(exceptionTypes_offset, value);
2828 }
2829
2830 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2831 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2832 method->int_field_put(modifiers_offset, value);
2833 }
2834
2835 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2836 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2837 method->obj_field_put(signature_offset, value);
2838 }
2839
2840 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2841 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2842 method->obj_field_put(annotations_offset, value);
2843 }
2844
2845 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2846 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2847 method->obj_field_put(parameter_annotations_offset, value);
2848 }
2849
2850 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2851 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2852 method->obj_field_put(annotation_default_offset, value);
2853 }
2854
2855 #define CONSTRUCTOR_FIELDS_DO(macro) \
2856 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2857 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2858 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2859 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2860 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2861 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2862 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2863 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2864
2865 void java_lang_reflect_Constructor::compute_offsets() {
2866 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2867 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2868 }
2869
2870 #if INCLUDE_CDS
2871 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2872 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2873 }
2874 #endif
2875
2876 Handle java_lang_reflect_Constructor::create(TRAPS) {
2877 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2878 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2879 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2880 InstanceKlass* ik = InstanceKlass::cast(k);
2881 // Ensure it is initialized
2882 ik->initialize(CHECK_NH);
2883 return ik->allocate_instance_handle(THREAD);
2884 }
2885
2886 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2887 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2888 return reflect->obj_field(clazz_offset);
2889 }
2890
2891 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2892 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2893 reflect->obj_field_put(clazz_offset, value);
2894 }
2895
2896 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2897 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2898 return constructor->obj_field(parameterTypes_offset);
2899 }
2900
2901 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2902 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2903 constructor->obj_field_put(parameterTypes_offset, value);
2904 }
2905
2906 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2907 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2908 constructor->obj_field_put(exceptionTypes_offset, value);
2909 }
2910
2911 int java_lang_reflect_Constructor::slot(oop reflect) {
2912 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2913 return reflect->int_field(slot_offset);
2914 }
2915
2916 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2917 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2918 reflect->int_field_put(slot_offset, value);
2919 }
2920
2921 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2922 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2923 constructor->int_field_put(modifiers_offset, value);
2924 }
2925
2926 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2927 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2928 constructor->obj_field_put(signature_offset, value);
2929 }
2930
2931 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2932 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2933 constructor->obj_field_put(annotations_offset, value);
2934 }
2935
2936 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2937 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2938 method->obj_field_put(parameter_annotations_offset, value);
2939 }
2940
2941 #define FIELD_FIELDS_DO(macro) \
2942 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2943 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2944 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
2945 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2946 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2947 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2948 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
2949
2950 void java_lang_reflect_Field::compute_offsets() {
2951 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
2952 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2953 }
2954
2955 #if INCLUDE_CDS
2956 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
2957 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2958 }
2959 #endif
2960
2961 Handle java_lang_reflect_Field::create(TRAPS) {
2962 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2963 Symbol* name = vmSymbols::java_lang_reflect_Field();
2964 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2965 InstanceKlass* ik = InstanceKlass::cast(k);
2966 // Ensure it is initialized
2967 ik->initialize(CHECK_NH);
2968 return ik->allocate_instance_handle(THREAD);
2969 }
2970
2971 oop java_lang_reflect_Field::clazz(oop reflect) {
2972 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2973 return reflect->obj_field(clazz_offset);
2974 }
2975
2976 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2977 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2978 reflect->obj_field_put(clazz_offset, value);
2979 }
2980
2981 oop java_lang_reflect_Field::name(oop field) {
2982 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2983 return field->obj_field(name_offset);
2984 }
2985
2986 void java_lang_reflect_Field::set_name(oop field, oop value) {
2987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2988 field->obj_field_put(name_offset, value);
2989 }
2990
2991 oop java_lang_reflect_Field::type(oop field) {
2992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2993 return field->obj_field(type_offset);
2994 }
2995
2996 void java_lang_reflect_Field::set_type(oop field, oop value) {
2997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2998 field->obj_field_put(type_offset, value);
2999 }
3000
3001 int java_lang_reflect_Field::slot(oop reflect) {
3002 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3003 return reflect->int_field(slot_offset);
3004 }
3005
3006 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3008 reflect->int_field_put(slot_offset, value);
3009 }
3010
3011 int java_lang_reflect_Field::modifiers(oop field) {
3012 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3013 return field->int_field(modifiers_offset);
3014 }
3015
3016 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3017 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3018 field->int_field_put(modifiers_offset, value);
3019 }
3020
3021 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3022 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3023 field->obj_field_put(signature_offset, value);
3024 }
3025
3026 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3027 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3028 field->obj_field_put(annotations_offset, value);
3029 }
3030
3031 #define CONSTANTPOOL_FIELDS_DO(macro) \
3032 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3033
3034 void reflect_ConstantPool::compute_offsets() {
3035 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3036 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3037 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3038 }
3039
3040 #if INCLUDE_CDS
3041 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3042 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3043 }
3044 #endif
3045
3046 #define PARAMETER_FIELDS_DO(macro) \
3047 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3048 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3049 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3050 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3051
3052 void java_lang_reflect_Parameter::compute_offsets() {
3053 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3054 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3055 }
3056
3057 #if INCLUDE_CDS
3058 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3059 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3060 }
3061 #endif
3062
3063 Handle java_lang_reflect_Parameter::create(TRAPS) {
3064 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3065 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3066 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3067 InstanceKlass* ik = InstanceKlass::cast(k);
3068 // Ensure it is initialized
3069 ik->initialize(CHECK_NH);
3070 return ik->allocate_instance_handle(THREAD);
3071 }
3072
3073 oop java_lang_reflect_Parameter::name(oop param) {
3074 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3075 return param->obj_field(name_offset);
3076 }
3077
3078 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3079 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3080 param->obj_field_put(name_offset, value);
3081 }
3082
3083 int java_lang_reflect_Parameter::modifiers(oop param) {
3084 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3085 return param->int_field(modifiers_offset);
3086 }
3087
3088 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3089 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3090 param->int_field_put(modifiers_offset, value);
3091 }
3092
3093 int java_lang_reflect_Parameter::index(oop param) {
3094 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3095 return param->int_field(index_offset);
3096 }
3097
3098 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3099 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3100 param->int_field_put(index_offset, value);
3101 }
3102
3103 oop java_lang_reflect_Parameter::executable(oop param) {
3104 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3105 return param->obj_field(executable_offset);
3106 }
3107
3108 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3109 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3110 param->obj_field_put(executable_offset, value);
3111 }
3112
3113
3114 int java_lang_Module::loader_offset;
3115 int java_lang_Module::name_offset;
3116 int java_lang_Module::_module_entry_offset = -1;
3117
3118 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3119 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3120 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3121 vmSymbols::java_lang_module_init_signature(),
3122 loader, module_name, CHECK_NH);
3123 }
3124
3125 #define MODULE_FIELDS_DO(macro) \
3126 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3127 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3128
3129 void java_lang_Module::compute_offsets() {
3130 InstanceKlass* k = SystemDictionary::Module_klass();
3131 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3132 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3133 }
3134
3135 #if INCLUDE_CDS
3136 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3137 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3138 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3139 }
3140 #endif
3141
3142 oop java_lang_Module::loader(oop module) {
3143 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3144 return module->obj_field(loader_offset);
3145 }
3146
3147 void java_lang_Module::set_loader(oop module, oop value) {
3148 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3149 module->obj_field_put(loader_offset, value);
3150 }
3151
3152 oop java_lang_Module::name(oop module) {
3153 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3154 return module->obj_field(name_offset);
3155 }
3156
3157 void java_lang_Module::set_name(oop module, oop value) {
3158 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3159 module->obj_field_put(name_offset, value);
3160 }
3161
3162 ModuleEntry* java_lang_Module::module_entry(oop module) {
3163 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3164 assert(module != NULL, "module can't be null");
3165 assert(oopDesc::is_oop(module), "module must be oop");
3166
3167 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3168 if (module_entry == NULL) {
3169 // If the inject field containing the ModuleEntry* is null then return the
3170 // class loader's unnamed module.
3171 oop loader = java_lang_Module::loader(module);
3172 Handle h_loader = Handle(Thread::current(), loader);
3173 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3174 return loader_cld->unnamed_module();
3175 }
3176 return module_entry;
3177 }
3178
3179 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3180 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3181 assert(module != NULL, "module can't be null");
3182 assert(oopDesc::is_oop(module), "module must be oop");
3183 module->address_field_put(_module_entry_offset, (address)module_entry);
3184 }
3185
3186 Handle reflect_ConstantPool::create(TRAPS) {
3187 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3188 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3189 // Ensure it is initialized
3190 k->initialize(CHECK_NH);
3191 return k->allocate_instance_handle(THREAD);
3192 }
3193
3194
3195 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3196 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3197 oop mirror = value->pool_holder()->java_mirror();
3198 // Save the mirror to get back the constant pool.
3199 reflect->obj_field_put(_oop_offset, mirror);
3200 }
3201
3202 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3203 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3204
3205 oop mirror = reflect->obj_field(_oop_offset);
3206 Klass* k = java_lang_Class::as_Klass(mirror);
3207 assert(k->is_instance_klass(), "Must be");
3208
3209 // Get the constant pool back from the klass. Since class redefinition
3210 // merges the new constant pool into the old, this is essentially the
3211 // same constant pool as the original. If constant pool merging is
3212 // no longer done in the future, this will have to change to save
3213 // the original.
3214 return InstanceKlass::cast(k)->constants();
3215 }
3216
3217 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3218 macro(_base_offset, k, "base", object_signature, false)
3219
3220 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3221 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3222 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3223 }
3224
3225 #if INCLUDE_CDS
3226 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3227 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3228 }
3229 #endif
3230
3231 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3232 Klass* k = SystemDictionary::box_klass(type);
3233 if (k == NULL) return NULL;
3234 InstanceKlass* ik = InstanceKlass::cast(k);
3235 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3236 return ik->allocate_instance(THREAD);
3237 }
3238
3239
3240 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3241 oop box = initialize_and_allocate(type, CHECK_0);
3242 if (box == NULL) return NULL;
3243 switch (type) {
3244 case T_BOOLEAN:
3245 box->bool_field_put(value_offset, value->z);
3246 break;
3247 case T_CHAR:
3248 box->char_field_put(value_offset, value->c);
3249 break;
3250 case T_FLOAT:
3251 box->float_field_put(value_offset, value->f);
3252 break;
3253 case T_DOUBLE:
3254 box->double_field_put(long_value_offset, value->d);
3255 break;
3256 case T_BYTE:
3257 box->byte_field_put(value_offset, value->b);
3258 break;
3259 case T_SHORT:
3260 box->short_field_put(value_offset, value->s);
3261 break;
3262 case T_INT:
3263 box->int_field_put(value_offset, value->i);
3264 break;
3265 case T_LONG:
3266 box->long_field_put(long_value_offset, value->j);
3267 break;
3268 default:
3269 return NULL;
3270 }
3271 return box;
3272 }
3273
3274
3275 BasicType java_lang_boxing_object::basic_type(oop box) {
3276 if (box == NULL) return T_ILLEGAL;
3277 BasicType type = SystemDictionary::box_klass_type(box->klass());
3278 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3279 return T_ILLEGAL;
3280 return type;
3281 }
3282
3283
3284 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3285 BasicType type = SystemDictionary::box_klass_type(box->klass());
3286 switch (type) {
3287 case T_BOOLEAN:
3288 value->z = box->bool_field(value_offset);
3289 break;
3290 case T_CHAR:
3291 value->c = box->char_field(value_offset);
3292 break;
3293 case T_FLOAT:
3294 value->f = box->float_field(value_offset);
3295 break;
3296 case T_DOUBLE:
3297 value->d = box->double_field(long_value_offset);
3298 break;
3299 case T_BYTE:
3300 value->b = box->byte_field(value_offset);
3301 break;
3302 case T_SHORT:
3303 value->s = box->short_field(value_offset);
3304 break;
3305 case T_INT:
3306 value->i = box->int_field(value_offset);
3307 break;
3308 case T_LONG:
3309 value->j = box->long_field(long_value_offset);
3310 break;
3311 default:
3312 return T_ILLEGAL;
3313 } // end switch
3314 return type;
3315 }
3316
3317
3318 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3319 BasicType type = SystemDictionary::box_klass_type(box->klass());
3320 switch (type) {
3321 case T_BOOLEAN:
3322 box->bool_field_put(value_offset, value->z);
3323 break;
3324 case T_CHAR:
3325 box->char_field_put(value_offset, value->c);
3326 break;
3327 case T_FLOAT:
3328 box->float_field_put(value_offset, value->f);
3329 break;
3330 case T_DOUBLE:
3331 box->double_field_put(long_value_offset, value->d);
3332 break;
3333 case T_BYTE:
3334 box->byte_field_put(value_offset, value->b);
3335 break;
3336 case T_SHORT:
3337 box->short_field_put(value_offset, value->s);
3338 break;
3339 case T_INT:
3340 box->int_field_put(value_offset, value->i);
3341 break;
3342 case T_LONG:
3343 box->long_field_put(long_value_offset, value->j);
3344 break;
3345 default:
3346 return T_ILLEGAL;
3347 } // end switch
3348 return type;
3349 }
3350
3351
3352 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3353 switch (type) {
3354 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3355 case T_CHAR: st->print("%d", value->c); break;
3356 case T_BYTE: st->print("%d", value->b); break;
3357 case T_SHORT: st->print("%d", value->s); break;
3358 case T_INT: st->print("%d", value->i); break;
3359 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3360 case T_FLOAT: st->print("%f", value->f); break;
3361 case T_DOUBLE: st->print("%lf", value->d); break;
3362 default: st->print("type %d?", type); break;
3363 }
3364 }
3365
3366 // Support for java_lang_ref_Reference
3367
3368 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3369 assert(obj != NULL, "sanity");
3370 if (offset != java_lang_ref_Reference::referent_offset) {
3371 return false;
3372 }
3373
3374 Klass* k = obj->klass();
3375 if (!k->is_instance_klass()) {
3376 return false;
3377 }
3378
3379 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3380 bool is_reference = ik->reference_type() != REF_NONE;
3381 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3382 return is_reference;
3383 }
3384
3385 // Support for java_lang_ref_SoftReference
3386 //
3387
3388 #define SOFTREFERENCE_FIELDS_DO(macro) \
3389 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3390 macro(static_clock_offset, k, "clock", long_signature, true)
3391
3392 void java_lang_ref_SoftReference::compute_offsets() {
3393 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3394 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3395 }
3396
3397 #if INCLUDE_CDS
3398 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3399 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3400 }
3401 #endif
3402
3403 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3404 return ref->long_field(timestamp_offset);
3405 }
3406
3407 jlong java_lang_ref_SoftReference::clock() {
3408 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3409 oop base = ik->static_field_base_raw();
3410 return base->long_field(static_clock_offset);
3411 }
3412
3413 void java_lang_ref_SoftReference::set_clock(jlong value) {
3414 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3415 oop base = ik->static_field_base_raw();
3416 base->long_field_put(static_clock_offset, value);
3417 }
3418
3419 // Support for java_lang_invoke_DirectMethodHandle
3420
3421 int java_lang_invoke_DirectMethodHandle::_member_offset;
3422
3423 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3424 oop member_name = NULL;
3425 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3426 "a DirectMethodHandle oop is expected");
3427 return dmh->obj_field(member_offset_in_bytes());
3428 }
3429
3430 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3431 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3432
3433 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3434 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3435 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3436 }
3437
3438 #if INCLUDE_CDS
3439 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3440 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3441 }
3442 #endif
3443
3444 // Support for java_lang_invoke_MethodHandle
3445
3446 int java_lang_invoke_MethodHandle::_type_offset;
3447 int java_lang_invoke_MethodHandle::_form_offset;
3448
3449 int java_lang_invoke_MemberName::_clazz_offset;
3450 int java_lang_invoke_MemberName::_name_offset;
3451 int java_lang_invoke_MemberName::_type_offset;
3452 int java_lang_invoke_MemberName::_flags_offset;
3453 int java_lang_invoke_MemberName::_method_offset;
3454 int java_lang_invoke_MemberName::_vmindex_offset;
3455
3456 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3457 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3458
3459 int java_lang_invoke_LambdaForm::_vmentry_offset;
3460
3461 #define METHODHANDLE_FIELDS_DO(macro) \
3462 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3463 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3464
3465 void java_lang_invoke_MethodHandle::compute_offsets() {
3466 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3467 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3468 }
3469
3470 #if INCLUDE_CDS
3471 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3472 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3473 }
3474 #endif
3475
3476 #define MEMBERNAME_FIELDS_DO(macro) \
3477 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3478 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3479 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3480 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3481 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3482
3483 void java_lang_invoke_MemberName::compute_offsets() {
3484 InstanceKlass* k = SystemDictionary::MemberName_klass();
3485 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3486 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3487 }
3488
3489 #if INCLUDE_CDS
3490 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3491 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3492 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3493 }
3494 #endif
3495
3496 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3497 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3498 assert(k != NULL, "jdk mismatch");
3499 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3500 }
3501
3502 #if INCLUDE_CDS
3503 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3504 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3505 }
3506 #endif
3507
3508 #define LAMBDAFORM_FIELDS_DO(macro) \
3509 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3510
3511 void java_lang_invoke_LambdaForm::compute_offsets() {
3512 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3513 assert (k != NULL, "jdk mismatch");
3514 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3515 }
3516
3517 #if INCLUDE_CDS
3518 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3519 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3520 }
3521 #endif
3522
3523 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3524 return obj != NULL && is_subclass(obj->klass());
3525 }
3526
3527
3528 oop java_lang_invoke_MethodHandle::type(oop mh) {
3529 return mh->obj_field(_type_offset);
3530 }
3531
3532 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3533 mh->obj_field_put(_type_offset, mtype);
3534 }
3535
3536 oop java_lang_invoke_MethodHandle::form(oop mh) {
3537 assert(_form_offset != 0, "");
3538 return mh->obj_field(_form_offset);
3539 }
3540
3541 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3542 assert(_form_offset != 0, "");
3543 mh->obj_field_put(_form_offset, lform);
3544 }
3545
3546 /// MemberName accessors
3547
3548 oop java_lang_invoke_MemberName::clazz(oop mname) {
3549 assert(is_instance(mname), "wrong type");
3550 return mname->obj_field(_clazz_offset);
3551 }
3552
3553 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3554 assert(is_instance(mname), "wrong type");
3555 mname->obj_field_put(_clazz_offset, clazz);
3556 }
3557
3558 oop java_lang_invoke_MemberName::name(oop mname) {
3559 assert(is_instance(mname), "wrong type");
3560 return mname->obj_field(_name_offset);
3561 }
3562
3563 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3564 assert(is_instance(mname), "wrong type");
3565 mname->obj_field_put(_name_offset, name);
3566 }
3567
3568 oop java_lang_invoke_MemberName::type(oop mname) {
3569 assert(is_instance(mname), "wrong type");
3570 return mname->obj_field(_type_offset);
3571 }
3572
3573 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3574 assert(is_instance(mname), "wrong type");
3575 mname->obj_field_put(_type_offset, type);
3576 }
3577
3578 int java_lang_invoke_MemberName::flags(oop mname) {
3579 assert(is_instance(mname), "wrong type");
3580 return mname->int_field(_flags_offset);
3581 }
3582
3583 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3584 assert(is_instance(mname), "wrong type");
3585 mname->int_field_put(_flags_offset, flags);
3586 }
3587
3588
3589 // Return vmtarget from ResolvedMethodName method field through indirection
3590 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3591 assert(is_instance(mname), "wrong type");
3592 oop method = mname->obj_field(_method_offset);
3593 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3594 }
3595
3596 bool java_lang_invoke_MemberName::is_method(oop mname) {
3597 assert(is_instance(mname), "must be MemberName");
3598 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3599 }
3600
3601 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3602 assert(is_instance(mname), "wrong type");
3603 mname->obj_field_put(_method_offset, resolved_method);
3604 }
3605
3606 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3607 assert(is_instance(mname), "wrong type");
3608 return (intptr_t) mname->address_field(_vmindex_offset);
3609 }
3610
3611 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3612 assert(is_instance(mname), "wrong type");
3613 mname->address_field_put(_vmindex_offset, (address) index);
3614 }
3615
3616
3617 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3618 assert(is_instance(resolved_method), "wrong type");
3619 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3620 assert(m->is_method(), "must be");
3621 return m;
3622 }
3623
3624 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3625 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3626 assert(is_instance(resolved_method), "wrong type");
3627 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3628 }
3629
3630 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3631 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3632 oop resolved_method = ResolvedMethodTable::find_method(m());
3633 if (resolved_method == NULL) {
3634 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3635 if (!k->is_initialized()) {
3636 k->initialize(CHECK_NULL);
3637 }
3638 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3639 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3640 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3641 // distinct loaders) to ensure the metadata is kept alive.
3642 // This mirror may be different than the one in clazz field.
3643 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3644 resolved_method = ResolvedMethodTable::add_method(m, Handle(THREAD, new_resolved_method));
3645 }
3646 return resolved_method;
3647 }
3648
3649 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3650 assert(is_instance(lform), "wrong type");
3651 return lform->obj_field(_vmentry_offset);
3652 }
3653
3654
3655 // Support for java_lang_invoke_MethodType
3656
3657 int java_lang_invoke_MethodType::_rtype_offset;
3658 int java_lang_invoke_MethodType::_ptypes_offset;
3659
3660 #define METHODTYPE_FIELDS_DO(macro) \
3661 macro(_rtype_offset, k, "rtype", class_signature, false); \
3662 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3663
3664 void java_lang_invoke_MethodType::compute_offsets() {
3665 InstanceKlass* k = SystemDictionary::MethodType_klass();
3666 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3667 }
3668
3669 #if INCLUDE_CDS
3670 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3671 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3672 }
3673 #endif
3674
3675 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3676 st->print("(");
3677 objArrayOop pts = ptypes(mt);
3678 for (int i = 0, limit = pts->length(); i < limit; i++) {
3679 java_lang_Class::print_signature(pts->obj_at(i), st);
3680 }
3681 st->print(")");
3682 java_lang_Class::print_signature(rtype(mt), st);
3683 }
3684
3685 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3686 ResourceMark rm;
3687 stringStream buffer(128);
3688 print_signature(mt, &buffer);
3689 const char* sigstr = buffer.base();
3690 int siglen = (int) buffer.size();
3691 Symbol *name;
3692 if (!intern_if_not_found) {
3693 name = SymbolTable::probe(sigstr, siglen);
3694 } else {
3695 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3696 }
3697 return name;
3698 }
3699
3700 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3701 if (oopDesc::equals(mt1, mt2))
3702 return true;
3703 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3704 return false;
3705 if (ptype_count(mt1) != ptype_count(mt2))
3706 return false;
3707 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3708 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3709 return false;
3710 }
3711 return true;
3712 }
3713
3714 oop java_lang_invoke_MethodType::rtype(oop mt) {
3715 assert(is_instance(mt), "must be a MethodType");
3716 return mt->obj_field(_rtype_offset);
3717 }
3718
3719 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3720 assert(is_instance(mt), "must be a MethodType");
3721 return (objArrayOop) mt->obj_field(_ptypes_offset);
3722 }
3723
3724 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3725 return ptypes(mt)->obj_at(idx);
3726 }
3727
3728 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3729 return ptypes(mt)->length();
3730 }
3731
3732 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3733 objArrayOop pts = ptypes(mt);
3734 int count = pts->length();
3735 int slots = 0;
3736 for (int i = 0; i < count; i++) {
3737 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3738 slots += type2size[bt];
3739 }
3740 return slots;
3741 }
3742
3743 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3744 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3745 return type2size[bt];
3746 }
3747
3748
3749 // Support for java_lang_invoke_CallSite
3750
3751 int java_lang_invoke_CallSite::_target_offset;
3752 int java_lang_invoke_CallSite::_context_offset;
3753
3754 #define CALLSITE_FIELDS_DO(macro) \
3755 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3756 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3757
3758 void java_lang_invoke_CallSite::compute_offsets() {
3759 InstanceKlass* k = SystemDictionary::CallSite_klass();
3760 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3761 }
3762
3763 #if INCLUDE_CDS
3764 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3765 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3766 }
3767 #endif
3768
3769 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3770 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3771
3772 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3773 return dep_oop;
3774 }
3775
3776 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3777
3778 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3779 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3780
3781 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3782 InstanceKlass* k = SystemDictionary::Context_klass();
3783 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3784 }
3785
3786 #if INCLUDE_CDS
3787 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3788 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3789 }
3790 #endif
3791
3792 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3793 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3794 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3795 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3796 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3797 return dep_ctx;
3798 }
3799
3800 // Support for java_security_AccessControlContext
3801
3802 int java_security_AccessControlContext::_context_offset = 0;
3803 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3804 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3805 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3806
3807 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3808 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3809 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3810 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3811 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3812
3813 void java_security_AccessControlContext::compute_offsets() {
3814 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3815 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3816 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3817 }
3818
3819 #if INCLUDE_CDS
3820 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3821 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3822 }
3823 #endif
3824
3825 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3826 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3827 // Ensure klass is initialized
3828 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3829 // Allocate result
3830 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3831 // Fill in values
3832 result->obj_field_put(_context_offset, context());
3833 result->obj_field_put(_privilegedContext_offset, privileged_context());
3834 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3835 // whitelist AccessControlContexts created by the JVM if present
3836 if (_isAuthorized_offset != -1) {
3837 result->bool_field_put(_isAuthorized_offset, true);
3838 }
3839 return result;
3840 }
3841
3842
3843 // Support for java_lang_ClassLoader
3844
3845 bool java_lang_ClassLoader::offsets_computed = false;
3846 int java_lang_ClassLoader::_loader_data_offset = -1;
3847 int java_lang_ClassLoader::parallelCapable_offset = -1;
3848 int java_lang_ClassLoader::name_offset = -1;
3849 int java_lang_ClassLoader::nameAndId_offset = -1;
3850 int java_lang_ClassLoader::unnamedModule_offset = -1;
3851
3852 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3853 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3854 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3855 }
3856
3857 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3858 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3859 return RawAccess<>::load_at(loader, _loader_data_offset);
3860 }
3861
3862 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3863 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3864 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3865 }
3866
3867 #define CLASSLOADER_FIELDS_DO(macro) \
3868 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3869 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3870 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3871 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3872 macro(parent_offset, k1, "parent", classloader_signature, false)
3873
3874 void java_lang_ClassLoader::compute_offsets() {
3875 assert(!offsets_computed, "offsets should be initialized only once");
3876 offsets_computed = true;
3877
3878 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3879 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3880
3881 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3882 }
3883
3884 #if INCLUDE_CDS
3885 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3886 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3887 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3888 }
3889 #endif
3890
3891 oop java_lang_ClassLoader::parent(oop loader) {
3892 assert(is_instance(loader), "loader must be oop");
3893 return loader->obj_field(parent_offset);
3894 }
3895
3896 // Returns the name field of this class loader. If the name field has not
3897 // been set, null will be returned.
3898 oop java_lang_ClassLoader::name(oop loader) {
3899 assert(is_instance(loader), "loader must be oop");
3900 return loader->obj_field(name_offset);
3901 }
3902
3903 // Returns the nameAndId field of this class loader. The format is
3904 // as follows:
3905 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
3906 // If the defining loader has no name then <qualified-class-name> @<id>
3907 // If built-in loader, then omit '@<id>' as there is only one instance.
3908 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
3909 oop java_lang_ClassLoader::nameAndId(oop loader) {
3910 assert(is_instance(loader), "loader must be oop");
3911 return loader->obj_field(nameAndId_offset);
3912 }
3913
3914 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3915 assert(is_instance(loader), "loader must be oop");
3916 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3917 oop acl = loader;
3918 debug_only(jint loop_count = 0);
3919 // This loop taken verbatim from ClassLoader.java:
3920 do {
3921 acl = parent(acl);
3922 if (oopDesc::equals(cl, acl)) {
3923 return true;
3924 }
3925 assert(++loop_count > 0, "loop_count overflow");
3926 } while (acl != NULL);
3927 return false;
3928 }
3929
3930 bool java_lang_ClassLoader::is_instance(oop obj) {
3931 return obj != NULL && is_subclass(obj->klass());
3932 }
3933
3934
3935 // For class loader classes, parallelCapable defined
3936 // based on non-null field
3937 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3938 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3939 if (parallelCapable_offset == -1) {
3940 // Default for backward compatibility is false
3941 return false;
3942 }
3943 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3944 }
3945
3946 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3947 // Fix for 4474172; see evaluation for more details
3948 loader = non_reflection_class_loader(loader);
3949
3950 oop cl = SystemDictionary::java_system_loader();
3951 while(cl != NULL) {
3952 if (oopDesc::equals(cl, loader)) return true;
3953 cl = parent(cl);
3954 }
3955 return false;
3956 }
3957
3958 // Return true if this is one of the class loaders associated with
3959 // the generated bytecodes for reflection.
3960 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3961 if (loader != NULL) {
3962 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3963 // This might be null in non-1.4 JDKs
3964 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3965 }
3966 return false;
3967 }
3968
3969 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3970 // See whether this is one of the class loaders associated with
3971 // the generated bytecodes for reflection, and if so, "magically"
3972 // delegate to its parent to prevent class loading from occurring
3973 // in places where applications using reflection didn't expect it.
3974 if (is_reflection_class_loader(loader)) {
3975 return parent(loader);
3976 }
3977 return loader;
3978 }
3979
3980 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3981 assert(is_instance(loader), "loader must be oop");
3982 return loader->obj_field(unnamedModule_offset);
3983 }
3984
3985 // Support for java_lang_System
3986 //
3987 #define SYSTEM_FIELDS_DO(macro) \
3988 macro(static_in_offset, k, "in", input_stream_signature, true); \
3989 macro(static_out_offset, k, "out", print_stream_signature, true); \
3990 macro(static_err_offset, k, "err", print_stream_signature, true); \
3991 macro(static_security_offset, k, "security", security_manager_signature, true)
3992
3993 void java_lang_System::compute_offsets() {
3994 InstanceKlass* k = SystemDictionary::System_klass();
3995 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3996 }
3997
3998 #if INCLUDE_CDS
3999 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4000 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4001 }
4002 #endif
4003
4004 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4005 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4006 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4007
4008 int java_lang_Class::_klass_offset;
4009 int java_lang_Class::_array_klass_offset;
4010 int java_lang_Class::_oop_size_offset;
4011 int java_lang_Class::_static_oop_field_count_offset;
4012 int java_lang_Class::_class_loader_offset;
4013 int java_lang_Class::_module_offset;
4014 int java_lang_Class::_protection_domain_offset;
4015 int java_lang_Class::_component_mirror_offset;
4016 int java_lang_Class::_init_lock_offset;
4017 int java_lang_Class::_signers_offset;
4018 int java_lang_Class::_name_offset;
4019 int java_lang_Class::_source_file_offset;
4020 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4021 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4022 int java_lang_Throwable::backtrace_offset;
4023 int java_lang_Throwable::detailMessage_offset;
4024 int java_lang_Throwable::stackTrace_offset;
4025 int java_lang_Throwable::depth_offset;
4026 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4027 int java_lang_reflect_AccessibleObject::override_offset;
4028 int java_lang_reflect_Method::clazz_offset;
4029 int java_lang_reflect_Method::name_offset;
4030 int java_lang_reflect_Method::returnType_offset;
4031 int java_lang_reflect_Method::parameterTypes_offset;
4032 int java_lang_reflect_Method::exceptionTypes_offset;
4033 int java_lang_reflect_Method::slot_offset;
4034 int java_lang_reflect_Method::modifiers_offset;
4035 int java_lang_reflect_Method::signature_offset;
4036 int java_lang_reflect_Method::annotations_offset;
4037 int java_lang_reflect_Method::parameter_annotations_offset;
4038 int java_lang_reflect_Method::annotation_default_offset;
4039 int java_lang_reflect_Constructor::clazz_offset;
4040 int java_lang_reflect_Constructor::parameterTypes_offset;
4041 int java_lang_reflect_Constructor::exceptionTypes_offset;
4042 int java_lang_reflect_Constructor::slot_offset;
4043 int java_lang_reflect_Constructor::modifiers_offset;
4044 int java_lang_reflect_Constructor::signature_offset;
4045 int java_lang_reflect_Constructor::annotations_offset;
4046 int java_lang_reflect_Constructor::parameter_annotations_offset;
4047 int java_lang_reflect_Field::clazz_offset;
4048 int java_lang_reflect_Field::name_offset;
4049 int java_lang_reflect_Field::type_offset;
4050 int java_lang_reflect_Field::slot_offset;
4051 int java_lang_reflect_Field::modifiers_offset;
4052 int java_lang_reflect_Field::signature_offset;
4053 int java_lang_reflect_Field::annotations_offset;
4054 int java_lang_reflect_Parameter::name_offset;
4055 int java_lang_reflect_Parameter::modifiers_offset;
4056 int java_lang_reflect_Parameter::index_offset;
4057 int java_lang_reflect_Parameter::executable_offset;
4058 int java_lang_boxing_object::value_offset;
4059 int java_lang_boxing_object::long_value_offset;
4060 int java_lang_ref_Reference::referent_offset;
4061 int java_lang_ref_Reference::queue_offset;
4062 int java_lang_ref_Reference::next_offset;
4063 int java_lang_ref_Reference::discovered_offset;
4064 int java_lang_ref_SoftReference::timestamp_offset;
4065 int java_lang_ref_SoftReference::static_clock_offset;
4066 int java_lang_ClassLoader::parent_offset;
4067 int java_lang_System::static_in_offset;
4068 int java_lang_System::static_out_offset;
4069 int java_lang_System::static_err_offset;
4070 int java_lang_System::static_security_offset;
4071 int java_lang_StackTraceElement::methodName_offset;
4072 int java_lang_StackTraceElement::fileName_offset;
4073 int java_lang_StackTraceElement::lineNumber_offset;
4074 int java_lang_StackTraceElement::moduleName_offset;
4075 int java_lang_StackTraceElement::moduleVersion_offset;
4076 int java_lang_StackTraceElement::classLoaderName_offset;
4077 int java_lang_StackTraceElement::declaringClass_offset;
4078 int java_lang_StackTraceElement::declaringClassObject_offset;
4079 int java_lang_StackFrameInfo::_memberName_offset;
4080 int java_lang_StackFrameInfo::_bci_offset;
4081 int java_lang_StackFrameInfo::_version_offset;
4082 int java_lang_LiveStackFrameInfo::_monitors_offset;
4083 int java_lang_LiveStackFrameInfo::_locals_offset;
4084 int java_lang_LiveStackFrameInfo::_operands_offset;
4085 int java_lang_LiveStackFrameInfo::_mode_offset;
4086 int java_lang_AssertionStatusDirectives::classes_offset;
4087 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4088 int java_lang_AssertionStatusDirectives::packages_offset;
4089 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4090 int java_lang_AssertionStatusDirectives::deflt_offset;
4091 int java_nio_Buffer::_limit_offset;
4092 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4093 int reflect_ConstantPool::_oop_offset;
4094 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4095
4096
4097 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4098 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4099 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4100 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4101 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4102 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4103 macro(methodName_offset, k, "methodName", string_signature, false); \
4104 macro(fileName_offset, k, "fileName", string_signature, false); \
4105 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4106
4107 // Support for java_lang_StackTraceElement
4108 void java_lang_StackTraceElement::compute_offsets() {
4109 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4110 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4111 }
4112
4113 #if INCLUDE_CDS
4114 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4115 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4116 }
4117 #endif
4118
4119 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4120 element->obj_field_put(fileName_offset, value);
4121 }
4122
4123 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4124 element->obj_field_put(declaringClass_offset, value);
4125 }
4126
4127 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4128 element->obj_field_put(methodName_offset, value);
4129 }
4130
4131 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4132 element->int_field_put(lineNumber_offset, value);
4133 }
4134
4135 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4136 element->obj_field_put(moduleName_offset, value);
4137 }
4138
4139 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4140 element->obj_field_put(moduleVersion_offset, value);
4141 }
4142
4143 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4144 element->obj_field_put(classLoaderName_offset, value);
4145 }
4146
4147 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4148 element->obj_field_put(declaringClassObject_offset, value);
4149 }
4150
4151 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4152 element->short_field_put(_version_offset, value);
4153 }
4154
4155 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4156 element->int_field_put(_bci_offset, value);
4157 }
4158
4159 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4160 element->obj_field_put(_monitors_offset, value);
4161 }
4162
4163 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4164 element->obj_field_put(_locals_offset, value);
4165 }
4166
4167 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4168 element->obj_field_put(_operands_offset, value);
4169 }
4170
4171 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4172 element->int_field_put(_mode_offset, value);
4173 }
4174
4175 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4176 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4177 macro(classes_offset, k, "classes", string_array_signature, false); \
4178 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4179 macro(packages_offset, k, "packages", string_array_signature, false); \
4180 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4181 macro(deflt_offset, k, "deflt", bool_signature, false)
4182
4183 void java_lang_AssertionStatusDirectives::compute_offsets() {
4184 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4185 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4186 }
4187
4188 #if INCLUDE_CDS
4189 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4190 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4191 }
4192 #endif
4193
4194 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4195 o->obj_field_put(classes_offset, val);
4196 }
4197
4198 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4199 o->obj_field_put(classEnabled_offset, val);
4200 }
4201
4202 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4203 o->obj_field_put(packages_offset, val);
4204 }
4205
4206 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4207 o->obj_field_put(packageEnabled_offset, val);
4208 }
4209
4210 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4211 o->bool_field_put(deflt_offset, val);
4212 }
4213
4214
4215 // Support for intrinsification of java.nio.Buffer.checkIndex
4216 int java_nio_Buffer::limit_offset() {
4217 return _limit_offset;
4218 }
4219
4220 #define BUFFER_FIELDS_DO(macro) \
4221 macro(_limit_offset, k, "limit", int_signature, false)
4222
4223 void java_nio_Buffer::compute_offsets() {
4224 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4225 assert(k != NULL, "must be loaded in 1.4+");
4226 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4227 }
4228
4229 #if INCLUDE_CDS
4230 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4231 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4232 }
4233 #endif
4234
4235 #define AOS_FIELDS_DO(macro) \
4236 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4237
4238 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4239 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4240 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4241 }
4242
4243 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4244 assert(_owner_offset != 0, "Must be initialized");
4245 return obj->obj_field(_owner_offset);
4246 }
4247
4248 #if INCLUDE_CDS
4249 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4250 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4251 }
4252 #endif
4253
4254 static int member_offset(int hardcoded_offset) {
4255 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4256 }
4257
4258 // Compute hard-coded offsets
4259 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4260 // are not available to determine the offset_of_static_fields.
4261 void JavaClasses::compute_hard_coded_offsets() {
4262
4263 // java_lang_boxing_object
4264 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4265 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4266
4267 // java_lang_ref_Reference
4268 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4269 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4270 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4271 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4272 }
4273
4274 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4275
4276 // Compute non-hard-coded field offsets of all the classes in this file
4277 void JavaClasses::compute_offsets() {
4278 if (UseSharedSpaces) {
4279 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4280 JvmtiExport::has_early_class_hook_env()),
4281 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4282 // None of the classes used by the rest of this function can be replaced by
4283 // JMVTI ClassFileLoadHook.
4284 // We are safe to use the archived offsets, which have already been restored
4285 // by JavaClasses::serialize_offsets, without computing the offsets again.
4286 return;
4287 }
4288
4289 // We have already called the compute_offsets() of the
4290 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4291 // earlier inside SystemDictionary::resolve_well_known_classes()
4292 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4293
4294 // generated interpreter code wants to know about the offsets we just computed:
4295 AbstractAssembler::update_delayed_values();
4296 }
4297
4298 #if INCLUDE_CDS
4299 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4300
4301 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4302 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4303 }
4304 #endif
4305
4306
4307 #ifndef PRODUCT
4308
4309 // These functions exist to assert the validity of hard-coded field offsets to guard
4310 // against changes in the class files
4311
4312 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4313 EXCEPTION_MARK;
4314 fieldDescriptor fd;
4315 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4316 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4317 InstanceKlass* ik = InstanceKlass::cast(k);
4318 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4319 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4320 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4321 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4322 return false;
4323 }
4324 if (fd.is_static()) {
4325 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4326 return false;
4327 }
4328 if (fd.offset() == hardcoded_offset ) {
4329 return true;
4330 } else {
4331 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4332 klass_name, field_name, hardcoded_offset, fd.offset());
4333 return false;
4334 }
4335 }
4336
4337 // Check the hard-coded field offsets of all the classes in this file
4338
4339 void JavaClasses::check_offsets() {
4340 bool valid = true;
4341
4342 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4343 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4344
4345 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4346 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4347
4348 // Boxed primitive objects (java_lang_boxing_object)
4349
4350 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4351 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4352 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4353 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4354 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4355 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4356 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4357 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4358
4359 // java.lang.ref.Reference
4360
4361 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4362 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4363 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4364 // Fake field
4365 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4366
4367 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4368 }
4369
4370 #endif // PRODUCT
4371
4372 int InjectedField::compute_offset() {
4373 InstanceKlass* ik = InstanceKlass::cast(klass());
4374 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4375 if (!may_be_java && !fs.access_flags().is_internal()) {
4376 // Only look at injected fields
4377 continue;
4378 }
4379 if (fs.name() == name() && fs.signature() == signature()) {
4380 return fs.offset();
4381 }
4382 }
4383 ResourceMark rm;
4384 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)" : "");
4385 #ifndef PRODUCT
4386 ik->print();
4387 tty->print_cr("all fields:");
4388 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4389 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4390 }
4391 #endif //PRODUCT
4392 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4393 return -1;
4394 }
4395
4396 void javaClasses_init() {
4397 JavaClasses::compute_offsets();
4398 JavaClasses::check_offsets();
4399 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4400 }