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::coder_offset = 0;
164
165 bool java_lang_String::initialized = false;
166
167 bool java_lang_String::is_instance(oop obj) {
168 return is_instance_inlined(obj);
169 }
170
171 #if INCLUDE_CDS
172 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
173 f->do_u4((u4*)&offset)
174 #endif
175
176 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
177 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
178
179 #define STRING_FIELDS_DO(macro) \
180 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
181 macro(hash_offset, k, "hash", int_signature, false); \
182 macro(coder_offset, k, "coder", byte_signature, false)
183
184 void java_lang_String::compute_offsets() {
185 if (initialized) {
186 return;
187 }
188
189 InstanceKlass* k = SystemDictionary::String_klass();
190 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
191
192 initialized = true;
193 }
194
195 #if INCLUDE_CDS
196 void java_lang_String::serialize_offsets(SerializeClosure* f) {
197 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
198 f->do_u4((u4*)&initialized);
199 }
200 #endif
201
202 class CompactStringsFixup : public FieldClosure {
203 private:
204 bool _value;
205
206 public:
207 CompactStringsFixup(bool value) : _value(value) {}
208
209 void do_field(fieldDescriptor* fd) {
210 if (fd->name() == vmSymbols::compact_strings_name()) {
211 oop mirror = fd->field_holder()->java_mirror();
212 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
213 assert(mirror != NULL, "String must have mirror already");
214 mirror->bool_field_put(fd->offset(), _value);
215 }
216 }
217 };
218
219 void java_lang_String::set_compact_strings(bool value) {
220 CompactStringsFixup fix(value);
221 SystemDictionary::String_klass()->do_local_static_fields(&fix);
222 }
223
224 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
225 assert(initialized, "Must be initialized");
226 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
227
228 // Create the String object first, so there's a chance that the String
229 // and the char array it points to end up in the same cache line.
230 oop obj;
231 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
232
233 // Create the char array. The String object must be handlized here
234 // because GC can happen as a result of the allocation attempt.
235 Handle h_obj(THREAD, obj);
236 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
237 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
238
239 // Point the String at the char array
240 obj = h_obj();
241 set_value(obj, buffer);
242 // No need to zero the offset, allocation zero'ed the entire String object
243 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
244 return h_obj;
245 }
246
247 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
248 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
249 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
250 typeArrayOop buffer = value(h_obj());
251 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
252 if (is_latin1) {
253 for (int index = 0; index < length; index++) {
254 buffer->byte_at_put(index, (jbyte)unicode[index]);
255 }
256 } else {
257 for (int index = 0; index < length; index++) {
258 buffer->char_at_put(index, unicode[index]);
259 }
260 }
261
262 #ifdef ASSERT
263 {
264 ResourceMark rm;
265 char* expected = UNICODE::as_utf8(unicode, length);
266 char* actual = as_utf8_string(h_obj());
267 if (strcmp(expected, actual) != 0) {
268 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
269 ShouldNotReachHere();
270 }
271 }
272 #endif
273
274 return h_obj;
275 }
276
277 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
278 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
279 return h_obj();
280 }
281
282 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
283 if (utf8_str == NULL) {
284 return Handle();
285 }
286 bool has_multibyte, is_latin1;
287 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
288 if (!CompactStrings) {
289 has_multibyte = true;
290 is_latin1 = false;
291 }
292
293 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
294 if (length > 0) {
295 if (!has_multibyte) {
296 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
297 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
298 } else if (is_latin1) {
299 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
300 } else {
301 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
302 }
303 }
304
305 #ifdef ASSERT
306 // This check is too strict because the input string is not necessarily valid UTF8.
307 // For example, it may be created with arbitrary content via jni_NewStringUTF.
308 /*
309 {
310 ResourceMark rm;
311 const char* expected = utf8_str;
312 char* actual = as_utf8_string(h_obj());
313 if (strcmp(expected, actual) != 0) {
314 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
315 ShouldNotReachHere();
316 }
317 }
318 */
319 #endif
320
321 return h_obj;
322 }
323
324 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
325 Handle h_obj = create_from_str(utf8_str, CHECK_0);
326 return h_obj();
327 }
328
329 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
330 const char* utf8_str = (char*)symbol->bytes();
331 int utf8_len = symbol->utf8_length();
332
333 bool has_multibyte, is_latin1;
334 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
335 if (!CompactStrings) {
336 has_multibyte = true;
337 is_latin1 = false;
338 }
339
340 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
341 if (length > 0) {
342 if (!has_multibyte) {
343 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
344 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
345 } else if (is_latin1) {
346 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
347 } else {
348 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
349 }
350 }
351
352 #ifdef ASSERT
353 {
354 ResourceMark rm;
355 const char* expected = symbol->as_utf8();
356 char* actual = as_utf8_string(h_obj());
357 if (strncmp(expected, actual, utf8_len) != 0) {
358 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
359 ShouldNotReachHere();
360 }
361 }
362 #endif
363
364 return h_obj;
365 }
366
367 // Converts a C string to a Java String based on current encoding
368 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
369 assert(str != NULL, "bad arguments");
370
371 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
372 static to_java_string_fn_t _to_java_string_fn = NULL;
373
374 if (_to_java_string_fn == NULL) {
375 void *lib_handle = os::native_java_library();
376 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
377 if (_to_java_string_fn == NULL) {
378 fatal("NewStringPlatform missing");
379 }
380 }
381
382 jstring js = NULL;
383 { JavaThread* thread = (JavaThread*)THREAD;
384 assert(thread->is_Java_thread(), "must be java thread");
385 HandleMark hm(thread);
386 ThreadToNativeFromVM ttn(thread);
387 js = (_to_java_string_fn)(thread->jni_environment(), str);
388 }
389 return Handle(THREAD, JNIHandles::resolve(js));
390 }
391
392 // Converts a Java String to a native C string that can be used for
393 // native OS calls.
394 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
395 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
396 static to_platform_string_fn_t _to_platform_string_fn = NULL;
397
398 if (_to_platform_string_fn == NULL) {
399 void *lib_handle = os::native_java_library();
400 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
401 if (_to_platform_string_fn == NULL) {
402 fatal("GetStringPlatformChars missing");
403 }
404 }
405
406 char *native_platform_string;
407 { JavaThread* thread = (JavaThread*)THREAD;
408 assert(thread->is_Java_thread(), "must be java thread");
409 JNIEnv *env = thread->jni_environment();
410 jstring js = (jstring) JNIHandles::make_local(env, java_string());
411 bool is_copy;
412 HandleMark hm(thread);
413 ThreadToNativeFromVM ttn(thread);
414 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
415 assert(is_copy == JNI_TRUE, "is_copy value changed");
416 JNIHandles::destroy_local(js);
417 }
418 return native_platform_string;
419 }
420
421 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
422 oop obj = java_string();
423 // Typical usage is to convert all '/' to '.' in string.
424 typeArrayOop value = java_lang_String::value(obj);
425 int length = java_lang_String::length(obj, value);
426 bool is_latin1 = java_lang_String::is_latin1(obj);
427
428 // First check if any from_char exist
429 int index; // Declared outside, used later
430 for (index = 0; index < length; index++) {
431 jchar c = !is_latin1 ? value->char_at(index) :
432 ((jchar) value->byte_at(index)) & 0xff;
433 if (c == from_char) {
434 break;
435 }
436 }
437 if (index == length) {
438 // No from_char, so do not copy.
439 return java_string;
440 }
441
442 // Check if result string will be latin1
443 bool to_is_latin1 = false;
444
445 // Replacement char must be latin1
446 if (CompactStrings && UNICODE::is_latin1(to_char)) {
447 if (is_latin1) {
448 // Source string is latin1 as well
449 to_is_latin1 = true;
450 } else if (!UNICODE::is_latin1(from_char)) {
451 // We are replacing an UTF16 char. Scan string to
452 // check if result can be latin1 encoded.
453 to_is_latin1 = true;
454 for (index = 0; index < length; index++) {
455 jchar c = value->char_at(index);
456 if (c != from_char && !UNICODE::is_latin1(c)) {
457 to_is_latin1 = false;
458 break;
459 }
460 }
461 }
462 }
463
464 // Create new UNICODE (or byte) buffer. Must handlize value because GC
465 // may happen during String and char array creation.
466 typeArrayHandle h_value(THREAD, value);
467 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
468 typeArrayOop from_buffer = h_value();
469 typeArrayOop to_buffer = java_lang_String::value(string());
470
471 // Copy contents
472 for (index = 0; index < length; index++) {
473 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
474 ((jchar) from_buffer->byte_at(index)) & 0xff;
475 if (c == from_char) {
476 c = to_char;
477 }
478 if (!to_is_latin1) {
479 to_buffer->char_at_put(index, c);
480 } else {
481 to_buffer->byte_at_put(index, (jbyte) c);
482 }
483 }
484 return string;
485 }
486
487 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
488 typeArrayOop value = java_lang_String::value(java_string);
489 length = java_lang_String::length(java_string, value);
490 bool is_latin1 = java_lang_String::is_latin1(java_string);
491
492 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
493 if (result != NULL) {
494 if (!is_latin1) {
495 for (int index = 0; index < length; index++) {
496 result[index] = value->char_at(index);
497 }
498 } else {
499 for (int index = 0; index < length; index++) {
500 result[index] = ((jchar) value->byte_at(index)) & 0xff;
501 }
502 }
503 } else {
504 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
505 }
506 return result;
507 }
508
509 unsigned int java_lang_String::hash_code(oop java_string) {
510 typeArrayOop value = java_lang_String::value(java_string);
511 int length = java_lang_String::length(java_string, value);
512 // Zero length string will hash to zero with String.hashCode() function.
513 if (length == 0) return 0;
514
515 bool is_latin1 = java_lang_String::is_latin1(java_string);
516
517 if (is_latin1) {
518 return java_lang_String::hash_code(value->byte_at_addr(0), length);
519 } else {
520 return java_lang_String::hash_code(value->char_at_addr(0), length);
521 }
522 }
523
524 char* java_lang_String::as_quoted_ascii(oop java_string) {
525 typeArrayOop value = java_lang_String::value(java_string);
526 int length = java_lang_String::length(java_string, value);
527 bool is_latin1 = java_lang_String::is_latin1(java_string);
528
529 if (length == 0) return NULL;
530
531 char* result;
532 int result_length;
533 if (!is_latin1) {
534 jchar* base = value->char_at_addr(0);
535 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
536 result = NEW_RESOURCE_ARRAY(char, result_length);
537 UNICODE::as_quoted_ascii(base, length, result, result_length);
538 } else {
539 jbyte* base = value->byte_at_addr(0);
540 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
541 result = NEW_RESOURCE_ARRAY(char, result_length);
542 UNICODE::as_quoted_ascii(base, length, result, result_length);
543 }
544 assert(result_length >= length + 1, "must not be shorter");
545 assert(result_length == (int)strlen(result) + 1, "must match");
546 return result;
547 }
548
549 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
550 typeArrayOop value = java_lang_String::value(java_string);
551 int length = java_lang_String::length(java_string, value);
552 bool is_latin1 = java_lang_String::is_latin1(java_string);
553 if (!is_latin1) {
554 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
555 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
556 return sym;
557 } else {
558 ResourceMark rm;
559 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
560 const char* base = UNICODE::as_utf8(position, length);
561 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
562 return sym;
563 }
564 }
565
566 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
567 typeArrayOop value = java_lang_String::value(java_string);
568 int length = java_lang_String::length(java_string, value);
569 bool is_latin1 = java_lang_String::is_latin1(java_string);
570 if (!is_latin1) {
571 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
572 return SymbolTable::probe_unicode(base, length);
573 } else {
574 ResourceMark rm;
575 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
576 const char* base = UNICODE::as_utf8(position, length);
577 return SymbolTable::probe(base, length);
578 }
579 }
580
581 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
582 assert(value_equals(value, java_lang_String::value(java_string)),
583 "value must be same as java_lang_String::value(java_string)");
584 int length = java_lang_String::length(java_string, value);
585 if (length == 0) {
586 return 0;
587 }
588 if (!java_lang_String::is_latin1(java_string)) {
589 return UNICODE::utf8_length(value->char_at_addr(0), length);
590 } else {
591 return UNICODE::utf8_length(value->byte_at_addr(0), length);
592 }
593 }
594
595 int java_lang_String::utf8_length(oop java_string) {
596 typeArrayOop value = java_lang_String::value(java_string);
597 return utf8_length(java_string, value);
598 }
599
600 char* java_lang_String::as_utf8_string(oop java_string) {
601 typeArrayOop value = java_lang_String::value(java_string);
602 int length = java_lang_String::length(java_string, value);
603 bool is_latin1 = java_lang_String::is_latin1(java_string);
604 if (!is_latin1) {
605 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
606 return UNICODE::as_utf8(position, length);
607 } else {
608 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
609 return UNICODE::as_utf8(position, length);
610 }
611 }
612
613 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
614 assert(value_equals(value, java_lang_String::value(java_string)),
615 "value must be same as 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, buf, buflen);
621 } else {
622 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
623 return UNICODE::as_utf8(position, length, buf, buflen);
624 }
625 }
626
627 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
628 typeArrayOop value = java_lang_String::value(java_string);
629 return as_utf8_string(java_string, value, buf, buflen);
630 }
631
632 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
633 typeArrayOop value = java_lang_String::value(java_string);
634 bool is_latin1 = java_lang_String::is_latin1(java_string);
635 assert(start + len <= java_lang_String::length(java_string), "just checking");
636 if (!is_latin1) {
637 jchar* position = value->char_at_addr(start);
638 return UNICODE::as_utf8(position, len);
639 } else {
640 jbyte* position = value->byte_at_addr(start);
641 return UNICODE::as_utf8(position, len);
642 }
643 }
644
645 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
646 assert(value_equals(value, java_lang_String::value(java_string)),
647 "value must be same as java_lang_String::value(java_string)");
648 assert(start + len <= java_lang_String::length(java_string), "just checking");
649 bool is_latin1 = java_lang_String::is_latin1(java_string);
650 if (!is_latin1) {
651 jchar* position = value->char_at_addr(start);
652 return UNICODE::as_utf8(position, len, buf, buflen);
653 } else {
654 jbyte* position = value->byte_at_addr(start);
655 return UNICODE::as_utf8(position, len, buf, buflen);
656 }
657 }
658
659 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
660 assert(java_string->klass() == SystemDictionary::String_klass(),
661 "must be java_string");
662 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
663 int length = java_lang_String::length(java_string, value);
664 if (length != len) {
665 return false;
666 }
667 bool is_latin1 = java_lang_String::is_latin1(java_string);
668 if (!is_latin1) {
669 for (int i = 0; i < len; i++) {
670 if (value->char_at(i) != chars[i]) {
671 return false;
672 }
673 }
674 } else {
675 for (int i = 0; i < len; i++) {
676 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
677 return false;
678 }
679 }
680 }
681 return true;
682 }
683
684 bool java_lang_String::equals(oop str1, oop str2) {
685 assert(str1->klass() == SystemDictionary::String_klass(),
686 "must be java String");
687 assert(str2->klass() == SystemDictionary::String_klass(),
688 "must be java String");
689 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
690 bool is_latin1 = java_lang_String::is_latin1(str1);
691 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
692 bool is_latin2 = java_lang_String::is_latin1(str2);
693
694 if (is_latin1 != is_latin2) {
695 // Strings with different coders are never equal.
696 return false;
697 }
698 return value_equals(value1, value2);
699 }
700
701 void java_lang_String::print(oop java_string, outputStream* st) {
702 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
703 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
704
705 if (value == NULL) {
706 // This can happen if, e.g., printing a String
707 // object before its initializer has been called
708 st->print("NULL");
709 return;
710 }
711
712 int length = java_lang_String::length(java_string, value);
713 bool is_latin1 = java_lang_String::is_latin1(java_string);
714
715 st->print("\"");
716 for (int index = 0; index < length; index++) {
717 st->print("%c", (!is_latin1) ? value->char_at(index) :
718 ((jchar) value->byte_at(index)) & 0xff );
719 }
720 st->print("\"");
721 }
722
723
724 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
725 assert(mirror.not_null() && fd->is_static(), "just checking");
726 if (fd->has_initial_value()) {
727 BasicType t = fd->field_type();
728 switch (t) {
729 case T_BYTE:
730 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
731 break;
732 case T_BOOLEAN:
733 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
734 break;
735 case T_CHAR:
736 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
737 break;
738 case T_SHORT:
739 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
740 break;
741 case T_INT:
742 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
743 break;
744 case T_FLOAT:
745 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
746 break;
747 case T_DOUBLE:
748 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
749 break;
750 case T_LONG:
751 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
752 break;
753 case T_OBJECT:
754 {
755 assert(fd->signature() == vmSymbols::string_signature(),
756 "just checking");
757 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
758 // Archive the String field and update the pointer.
759 oop s = mirror()->obj_field(fd->offset());
760 oop archived_s = StringTable::create_archived_string(s, CHECK);
761 mirror()->obj_field_put(fd->offset(), archived_s);
762 } else {
763 oop string = fd->string_initial_value(CHECK);
764 mirror()->obj_field_put(fd->offset(), string);
765 }
766 }
767 break;
768 default:
769 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
770 "Illegal ConstantValue attribute in class file");
771 }
772 }
773 }
774
775
776 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
777 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
778
779 // If the offset was read from the shared archive, it was fixed up already
780 if (!k->is_shared()) {
781 if (k->is_instance_klass()) {
782 // During bootstrap, java.lang.Class wasn't loaded so static field
783 // offsets were computed without the size added it. Go back and
784 // update all the static field offsets to included the size.
785 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
786 if (fs.access_flags().is_static()) {
787 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
788 fs.set_offset(real_offset);
789 }
790 }
791 }
792 }
793
794 if (k->is_shared() && k->has_raw_archived_mirror()) {
795 if (HeapShared::open_archive_heap_region_mapped()) {
796 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
797 assert(present, "Missing archived mirror for %s", k->external_name());
798 return;
799 } else {
800 k->set_java_mirror_handle(NULL);
801 k->clear_has_raw_archived_mirror();
802 }
803 }
804 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
805 }
806
807 void java_lang_Class::initialize_mirror_fields(Klass* k,
808 Handle mirror,
809 Handle protection_domain,
810 TRAPS) {
811 // Allocate a simple java object for a lock.
812 // This needs to be a java object because during class initialization
813 // it can be held across a java call.
814 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
815 set_init_lock(mirror(), r);
816
817 // Set protection domain also
818 set_protection_domain(mirror(), protection_domain());
819
820 // Initialize static fields
821 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
822 }
823
824 // Set the java.lang.Module module field in the java_lang_Class mirror
825 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
826 if (module.is_null()) {
827 // During startup, the module may be NULL only if java.base has not been defined yet.
828 // Put the class on the fixup_module_list to patch later when the java.lang.Module
829 // for java.base is known. But note that since we captured the NULL module another
830 // thread may have completed that initialization.
831
832 bool javabase_was_defined = false;
833 {
834 MutexLocker m1(Module_lock, THREAD);
835 // Keep list of classes needing java.base module fixup
836 if (!ModuleEntryTable::javabase_defined()) {
837 assert(k->java_mirror() != NULL, "Class's mirror is null");
838 k->class_loader_data()->inc_keep_alive();
839 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
840 fixup_module_field_list()->push(k);
841 } else {
842 javabase_was_defined = true;
843 }
844 }
845
846 // If java.base was already defined then patch this particular class with java.base.
847 if (javabase_was_defined) {
848 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
849 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
850 "Setting class module field, " JAVA_BASE_NAME " should be defined");
851 Handle javabase_handle(THREAD, javabase_entry->module());
852 set_module(mirror(), javabase_handle());
853 }
854 } else {
855 assert(Universe::is_module_initialized() ||
856 (ModuleEntryTable::javabase_defined() &&
857 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
858 "Incorrect java.lang.Module specification while creating mirror");
859 set_module(mirror(), module());
860 }
861 }
862
863 // Statically allocate fixup lists because they always get created.
864 void java_lang_Class::allocate_fixup_lists() {
865 GrowableArray<Klass*>* mirror_list =
866 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
867 set_fixup_mirror_list(mirror_list);
868
869 GrowableArray<Klass*>* module_list =
870 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
871 set_fixup_module_field_list(module_list);
872 }
873
874 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
875 Handle module, Handle protection_domain, TRAPS) {
876 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
877 assert(k->java_mirror() == NULL, "should only assign mirror once");
878
879 // Use this moment of initialization to cache modifier_flags also,
880 // to support Class.getModifiers(). Instance classes recalculate
881 // the cached flags after the class file is parsed, but before the
882 // class is put into the system dictionary.
883 int computed_modifiers = k->compute_modifier_flags(CHECK);
884 k->set_modifier_flags(computed_modifiers);
885 // Class_klass has to be loaded because it is used to allocate
886 // the mirror.
887 if (SystemDictionary::Class_klass_loaded()) {
888 // Allocate mirror (java.lang.Class instance)
889 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
890 Handle mirror(THREAD, mirror_oop);
891 Handle comp_mirror;
892
893 // Setup indirection from mirror->klass
894 java_lang_Class::set_klass(mirror(), k);
895
896 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
897 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
898
899 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
900
901 // It might also have a component mirror. This mirror must already exist.
902 if (k->is_array_klass()) {
903 if (k->is_typeArray_klass()) {
904 BasicType type = TypeArrayKlass::cast(k)->element_type();
905 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
906 } else {
907 assert(k->is_objArray_klass(), "Must be");
908 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
909 assert(element_klass != NULL, "Must have an element klass");
910 comp_mirror = Handle(THREAD, element_klass->java_mirror());
911 }
912 assert(comp_mirror() != NULL, "must have a mirror");
913
914 // Two-way link between the array klass and its component mirror:
915 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
916 set_component_mirror(mirror(), comp_mirror());
917 // See below for ordering dependencies between field array_klass in component mirror
918 // and java_mirror in this klass.
919 } else {
920 assert(k->is_instance_klass(), "Must be");
921
922 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
923 if (HAS_PENDING_EXCEPTION) {
924 // If any of the fields throws an exception like OOM remove the klass field
925 // from the mirror so GC doesn't follow it after the klass has been deallocated.
926 // This mirror looks like a primitive type, which logically it is because it
927 // it represents no class.
928 java_lang_Class::set_klass(mirror(), NULL);
929 return;
930 }
931 }
932
933 // set the classLoader field in the java_lang_Class instance
934 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
935 set_class_loader(mirror(), class_loader());
936
937 // Setup indirection from klass->mirror
938 // after any exceptions can happen during allocations.
939 k->set_java_mirror(mirror);
940
941 // Set the module field in the java_lang_Class instance. This must be done
942 // after the mirror is set.
943 set_mirror_module_field(k, mirror, module, THREAD);
944
945 if (comp_mirror() != NULL) {
946 // Set after k->java_mirror() is published, because compiled code running
947 // concurrently doesn't expect a k to have a null java_mirror.
948 release_set_array_klass(comp_mirror(), k);
949 }
950 } else {
951 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
952 fixup_mirror_list()->push(k);
953 }
954 }
955
956 #if INCLUDE_CDS_JAVA_HEAP
957 // Clears mirror fields. Static final fields with initial values are reloaded
958 // from constant pool. The object identity hash is in the object header and is
959 // not affected.
960 class ResetMirrorField: public FieldClosure {
961 private:
962 Handle _m;
963
964 public:
965 ResetMirrorField(Handle mirror) : _m(mirror) {}
966
967 void do_field(fieldDescriptor* fd) {
968 assert(DumpSharedSpaces, "dump time only");
969 assert(_m.not_null(), "Mirror cannot be NULL");
970
971 if (fd->is_static() && fd->has_initial_value()) {
972 initialize_static_field(fd, _m, Thread::current());
973 return;
974 }
975
976 BasicType ft = fd->field_type();
977 switch (ft) {
978 case T_BYTE:
979 _m()->byte_field_put(fd->offset(), 0);
980 break;
981 case T_CHAR:
982 _m()->char_field_put(fd->offset(), 0);
983 break;
984 case T_DOUBLE:
985 _m()->double_field_put(fd->offset(), 0);
986 break;
987 case T_FLOAT:
988 _m()->float_field_put(fd->offset(), 0);
989 break;
990 case T_INT:
991 _m()->int_field_put(fd->offset(), 0);
992 break;
993 case T_LONG:
994 _m()->long_field_put(fd->offset(), 0);
995 break;
996 case T_SHORT:
997 _m()->short_field_put(fd->offset(), 0);
998 break;
999 case T_BOOLEAN:
1000 _m()->bool_field_put(fd->offset(), false);
1001 break;
1002 case T_ARRAY:
1003 case T_OBJECT: {
1004 // It might be useful to cache the String field, but
1005 // for now just clear out any reference field
1006 oop o = _m()->obj_field(fd->offset());
1007 _m()->obj_field_put(fd->offset(), NULL);
1008 break;
1009 }
1010 default:
1011 ShouldNotReachHere();
1012 break;
1013 }
1014 }
1015 };
1016
1017 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1018 assert(HeapShared::is_heap_object_archiving_allowed(),
1019 "HeapShared::is_heap_object_archiving_allowed() must be true");
1020
1021 for (int t = 0; t <= T_VOID; t++) {
1022 oop m = Universe::_mirrors[t];
1023 if (m != NULL) {
1024 // Update the field at _array_klass_offset to point to the relocated array klass.
1025 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1026 assert(archived_m != NULL, "sanity");
1027 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1028 assert(ak != NULL || t == T_VOID, "should not be NULL");
1029 if (ak != NULL) {
1030 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1031 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1032 }
1033
1034 // Clear the fields. Just to be safe
1035 Klass *k = m->klass();
1036 Handle archived_mirror_h(THREAD, archived_m);
1037 ResetMirrorField reset(archived_mirror_h);
1038 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1039
1040 log_trace(cds, heap, mirror)(
1041 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1042 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1043
1044 Universe::_mirrors[t] = archived_m;
1045 }
1046 }
1047
1048 assert(Universe::_mirrors[T_INT] != NULL &&
1049 Universe::_mirrors[T_FLOAT] != NULL &&
1050 Universe::_mirrors[T_DOUBLE] != NULL &&
1051 Universe::_mirrors[T_BYTE] != NULL &&
1052 Universe::_mirrors[T_BOOLEAN] != NULL &&
1053 Universe::_mirrors[T_CHAR] != NULL &&
1054 Universe::_mirrors[T_LONG] != NULL &&
1055 Universe::_mirrors[T_SHORT] != NULL &&
1056 Universe::_mirrors[T_VOID] != NULL, "sanity");
1057
1058 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1059 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1060 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1061 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1062 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1063 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1064 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1065 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1066 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1067 }
1068
1069 //
1070 // After the mirror object is successfully archived, the archived
1071 // klass is set with _has_archived_raw_mirror flag.
1072 //
1073 // The _has_archived_raw_mirror flag is cleared at runtime when the
1074 // archived mirror is restored. If archived java heap data cannot
1075 // be used at runtime, new mirror object is created for the shared
1076 // class. The _has_archived_raw_mirror is cleared also during the process.
1077 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1078 assert(HeapShared::is_heap_object_archiving_allowed(),
1079 "HeapShared::is_heap_object_archiving_allowed() must be true");
1080
1081 // Mirror is already archived
1082 if (k->has_raw_archived_mirror()) {
1083 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1084 return k->archived_java_mirror_raw();
1085 }
1086
1087 // No mirror
1088 oop mirror = k->java_mirror();
1089 if (mirror == NULL) {
1090 return NULL;
1091 }
1092
1093 if (k->is_instance_klass()) {
1094 InstanceKlass *ik = InstanceKlass::cast(k);
1095 assert(ik->signers() == NULL, "class with signer should have been excluded");
1096
1097 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1098 ik->is_shared_app_class())) {
1099 // Archiving mirror for classes from non-builtin loaders is not
1100 // supported. Clear the _java_mirror within the archived class.
1101 k->set_java_mirror_handle(NULL);
1102 return NULL;
1103 }
1104 }
1105
1106 // Now start archiving the mirror object
1107 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1108 if (archived_mirror == NULL) {
1109 return NULL;
1110 }
1111
1112 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1113 if (archived_mirror == NULL) {
1114 return NULL;
1115 }
1116
1117 k->set_archived_java_mirror_raw(archived_mirror);
1118
1119 k->set_has_raw_archived_mirror();
1120
1121 ResourceMark rm;
1122 log_trace(cds, heap, mirror)(
1123 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1124 k->external_name(), p2i(mirror), p2i(archived_mirror));
1125
1126 return archived_mirror;
1127 }
1128
1129 // The process is based on create_mirror().
1130 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1131 oop archived_mirror,
1132 Thread *THREAD) {
1133 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1134 // to archived metadata and objects below.
1135 Klass *c = archived_mirror->klass();
1136 Handle archived_mirror_h(THREAD, archived_mirror);
1137 ResetMirrorField reset(archived_mirror_h);
1138 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1139
1140 if (k->is_array_klass()) {
1141 oop archived_comp_mirror;
1142 if (k->is_typeArray_klass()) {
1143 // The primitive type mirrors are already archived. Get the archived mirror.
1144 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1145 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1146 assert(archived_comp_mirror != NULL, "Must be");
1147 } else {
1148 assert(k->is_objArray_klass(), "Must be");
1149 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1150 assert(element_klass != NULL, "Must have an element klass");
1151 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1152 if (archived_comp_mirror == NULL) {
1153 return NULL;
1154 }
1155 }
1156 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1157 } else {
1158 assert(k->is_instance_klass(), "Must be");
1159
1160 // Reset local static fields in the mirror
1161 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1162
1163 java_lang_Class:set_init_lock(archived_mirror, NULL);
1164
1165 set_protection_domain(archived_mirror, NULL);
1166 }
1167
1168 // clear class loader and mirror_module_field
1169 set_class_loader(archived_mirror, NULL);
1170 set_module(archived_mirror, NULL);
1171
1172 // The archived mirror's field at _klass_offset is still pointing to the original
1173 // klass. Updated the field in the archived mirror to point to the relocated
1174 // klass in the archive.
1175 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1176 log_debug(cds, heap, mirror)(
1177 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1178 p2i(as_Klass(mirror)), p2i(reloc_k));
1179 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1180
1181 // The field at _array_klass_offset is pointing to the original one dimension
1182 // higher array klass if exists. Relocate the pointer.
1183 Klass *arr = array_klass_acquire(mirror);
1184 if (arr != NULL) {
1185 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1186 log_debug(cds, heap, mirror)(
1187 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1188 p2i(arr), p2i(reloc_arr));
1189 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1190 }
1191 return archived_mirror;
1192 }
1193
1194 // Returns true if the mirror is updated, false if no archived mirror
1195 // data is present. After the archived mirror object is restored, the
1196 // shared klass' _has_raw_archived_mirror flag is cleared.
1197 bool java_lang_Class::restore_archived_mirror(Klass *k,
1198 Handle class_loader, Handle module,
1199 Handle protection_domain, TRAPS) {
1200 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1201 // see more details in SystemDictionary::resolve_well_known_classes().
1202 if (!SystemDictionary::Class_klass_loaded()) {
1203 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1204 fixup_mirror_list()->push(k);
1205 return true;
1206 }
1207
1208 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1209
1210 if (m == NULL) {
1211 return false;
1212 }
1213
1214 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1215
1216 // mirror is archived, restore
1217 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1218 Handle mirror(THREAD, m);
1219
1220 if (!k->is_array_klass()) {
1221 // - local static final fields with initial values were initialized at dump time
1222
1223 // create the init_lock
1224 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1225 set_init_lock(mirror(), r);
1226
1227 if (protection_domain.not_null()) {
1228 set_protection_domain(mirror(), protection_domain());
1229 }
1230 }
1231
1232 assert(class_loader() == k->class_loader(), "should be same");
1233 if (class_loader.not_null()) {
1234 set_class_loader(mirror(), class_loader());
1235 }
1236
1237 k->set_java_mirror(mirror);
1238 k->clear_has_raw_archived_mirror();
1239
1240 set_mirror_module_field(k, mirror, module, THREAD);
1241
1242 ResourceMark rm;
1243 log_trace(cds, heap, mirror)(
1244 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1245
1246 return true;
1247 }
1248 #endif // INCLUDE_CDS_JAVA_HEAP
1249
1250 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1251 assert(_module_offset != 0, "must have been computed already");
1252 java_lang_Class::set_module(k->java_mirror(), module());
1253 }
1254
1255 int java_lang_Class::oop_size(oop java_class) {
1256 assert(_oop_size_offset != 0, "must be set");
1257 int size = java_class->int_field(_oop_size_offset);
1258 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1259 return size;
1260 }
1261
1262
1263 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1264 assert(_oop_size_offset != 0, "must be set");
1265 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1266 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1267 }
1268
1269 int java_lang_Class::static_oop_field_count(oop java_class) {
1270 assert(_static_oop_field_count_offset != 0, "must be set");
1271 return java_class->int_field(_static_oop_field_count_offset);
1272 }
1273
1274 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1275 assert(_static_oop_field_count_offset != 0, "must be set");
1276 return java_class->int_field_raw(_static_oop_field_count_offset);
1277 }
1278
1279 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1280 assert(_static_oop_field_count_offset != 0, "must be set");
1281 java_class->int_field_put(_static_oop_field_count_offset, size);
1282 }
1283
1284 oop java_lang_Class::protection_domain(oop java_class) {
1285 assert(_protection_domain_offset != 0, "must be set");
1286 return java_class->obj_field(_protection_domain_offset);
1287 }
1288 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1289 assert(_protection_domain_offset != 0, "must be set");
1290 java_class->obj_field_put(_protection_domain_offset, pd);
1291 }
1292
1293 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1294 assert(_component_mirror_offset != 0, "must be set");
1295 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1296 }
1297 oop java_lang_Class::component_mirror(oop java_class) {
1298 assert(_component_mirror_offset != 0, "must be set");
1299 return java_class->obj_field(_component_mirror_offset);
1300 }
1301
1302 oop java_lang_Class::init_lock(oop java_class) {
1303 assert(_init_lock_offset != 0, "must be set");
1304 return java_class->obj_field(_init_lock_offset);
1305 }
1306 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1307 assert(_init_lock_offset != 0, "must be set");
1308 java_class->obj_field_put(_init_lock_offset, init_lock);
1309 }
1310
1311 objArrayOop java_lang_Class::signers(oop java_class) {
1312 assert(_signers_offset != 0, "must be set");
1313 return (objArrayOop)java_class->obj_field(_signers_offset);
1314 }
1315 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1316 assert(_signers_offset != 0, "must be set");
1317 java_class->obj_field_put(_signers_offset, (oop)signers);
1318 }
1319
1320
1321 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1322 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1323 if (_class_loader_offset != 0) {
1324 java_class->obj_field_put(_class_loader_offset, loader);
1325 }
1326 }
1327
1328 oop java_lang_Class::class_loader(oop java_class) {
1329 assert(_class_loader_offset != 0, "must be set");
1330 return java_class->obj_field(_class_loader_offset);
1331 }
1332
1333 oop java_lang_Class::module(oop java_class) {
1334 assert(_module_offset != 0, "must be set");
1335 return java_class->obj_field(_module_offset);
1336 }
1337
1338 void java_lang_Class::set_module(oop java_class, oop module) {
1339 assert(_module_offset != 0, "must be set");
1340 java_class->obj_field_put(_module_offset, module);
1341 }
1342
1343 oop java_lang_Class::name(Handle java_class, TRAPS) {
1344 assert(_name_offset != 0, "must be set");
1345 oop o = java_class->obj_field(_name_offset);
1346 if (o == NULL) {
1347 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1348 java_class->obj_field_put(_name_offset, o);
1349 }
1350 return o;
1351 }
1352
1353 oop java_lang_Class::source_file(oop java_class) {
1354 assert(_source_file_offset != 0, "must be set");
1355 return java_class->obj_field(_source_file_offset);
1356 }
1357
1358 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1359 assert(_source_file_offset != 0, "must be set");
1360 java_class->obj_field_put(_source_file_offset, source_file);
1361 }
1362
1363 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1364 // This should be improved by adding a field at the Java level or by
1365 // introducing a new VM klass (see comment in ClassFileParser)
1366 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1367 if (type != T_VOID) {
1368 Klass* aklass = Universe::typeArrayKlassObj(type);
1369 assert(aklass != NULL, "correct bootstrap");
1370 release_set_array_klass(java_class, aklass);
1371 }
1372 #ifdef ASSERT
1373 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1374 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1375 #endif
1376 return java_class;
1377 }
1378
1379
1380 Klass* java_lang_Class::as_Klass(oop java_class) {
1381 //%note memory_2
1382 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1383 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1384 assert(k == NULL || k->is_klass(), "type check");
1385 return k;
1386 }
1387
1388 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1389 //%note memory_2
1390 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1391 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1392 assert(k == NULL || k->is_klass(), "type check");
1393 return k;
1394 }
1395
1396
1397 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1398 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1399 java_class->metadata_field_put(_klass_offset, klass);
1400 }
1401
1402
1403 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1404 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1405 Symbol* name = NULL;
1406 bool is_instance = false;
1407 if (is_primitive(java_class)) {
1408 name = vmSymbols::type_signature(primitive_type(java_class));
1409 } else {
1410 Klass* k = as_Klass(java_class);
1411 is_instance = k->is_instance_klass();
1412 name = k->name();
1413 }
1414 if (name == NULL) {
1415 st->print("<null>");
1416 return;
1417 }
1418 if (is_instance) st->print("L");
1419 st->write((char*) name->base(), (int) name->utf8_length());
1420 if (is_instance) st->print(";");
1421 }
1422
1423 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1424 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1425 Symbol* name;
1426 if (is_primitive(java_class)) {
1427 name = vmSymbols::type_signature(primitive_type(java_class));
1428 // Because this can create a new symbol, the caller has to decrement
1429 // the refcount, so make adjustment here and below for symbols returned
1430 // that are not created or incremented due to a successful lookup.
1431 name->increment_refcount();
1432 } else {
1433 Klass* k = as_Klass(java_class);
1434 if (!k->is_instance_klass()) {
1435 name = k->name();
1436 name->increment_refcount();
1437 } else {
1438 ResourceMark rm;
1439 const char* sigstr = k->signature_name();
1440 int siglen = (int) strlen(sigstr);
1441 if (!intern_if_not_found) {
1442 name = SymbolTable::probe(sigstr, siglen);
1443 } else {
1444 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1445 }
1446 }
1447 }
1448 return name;
1449 }
1450
1451 // Returns the Java name for this Java mirror (Resource allocated)
1452 // See Klass::external_name().
1453 // For primitive type Java mirrors, its type name is returned.
1454 const char* java_lang_Class::as_external_name(oop java_class) {
1455 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1456 const char* name = NULL;
1457 if (is_primitive(java_class)) {
1458 name = type2name(primitive_type(java_class));
1459 } else {
1460 name = as_Klass(java_class)->external_name();
1461 }
1462 if (name == NULL) {
1463 name = "<null>";
1464 }
1465 return name;
1466 }
1467
1468 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1469 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1470 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1471 return k;
1472 }
1473
1474
1475 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1476 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1477 java_class->release_metadata_field_put(_array_klass_offset, klass);
1478 }
1479
1480
1481 BasicType java_lang_Class::primitive_type(oop java_class) {
1482 assert(java_lang_Class::is_primitive(java_class), "just checking");
1483 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1484 BasicType type = T_VOID;
1485 if (ak != NULL) {
1486 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1487 type = ArrayKlass::cast(ak)->element_type();
1488 } else {
1489 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1490 }
1491 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1492 return type;
1493 }
1494
1495 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1496 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1497 if (is_primitive(java_class)) {
1498 if (reference_klass != NULL)
1499 (*reference_klass) = NULL;
1500 return primitive_type(java_class);
1501 } else {
1502 if (reference_klass != NULL)
1503 (*reference_klass) = as_Klass(java_class);
1504 return T_OBJECT;
1505 }
1506 }
1507
1508
1509 oop java_lang_Class::primitive_mirror(BasicType t) {
1510 oop mirror = Universe::java_mirror(t);
1511 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1512 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1513 return mirror;
1514 }
1515
1516 bool java_lang_Class::offsets_computed = false;
1517 int java_lang_Class::classRedefinedCount_offset = -1;
1518
1519 #define CLASS_FIELDS_DO(macro) \
1520 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1521 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1522 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1523 macro(_module_offset, k, "module", module_signature, false); \
1524 macro(_name_offset, k, "name", string_signature, false); \
1525
1526 void java_lang_Class::compute_offsets() {
1527 if (offsets_computed) {
1528 return;
1529 }
1530
1531 offsets_computed = true;
1532
1533 InstanceKlass* k = SystemDictionary::Class_klass();
1534 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1535
1536 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1537 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1538 // GC treats them the same.
1539 _init_lock_offset = _component_mirror_offset;
1540
1541 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1542 }
1543
1544 #if INCLUDE_CDS
1545 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1546 f->do_u4((u4*)&offsets_computed);
1547 f->do_u4((u4*)&_init_lock_offset);
1548
1549 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1550
1551 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1552 }
1553 #endif
1554
1555 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1556 if (classRedefinedCount_offset == -1) {
1557 // If we don't have an offset for it then just return -1 as a marker.
1558 return -1;
1559 }
1560
1561 return the_class_mirror->int_field(classRedefinedCount_offset);
1562 }
1563
1564 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1565 if (classRedefinedCount_offset == -1) {
1566 // If we don't have an offset for it then nothing to set.
1567 return;
1568 }
1569
1570 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1571 }
1572
1573
1574 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1575 // platform thread structure, and a eetop offset which was used for thread
1576 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1577 // merged, so in the HotSpot VM we just use the eetop field for the thread
1578 // instead of the privateInfo_offset.
1579 //
1580 // Note: The stackSize field is only present starting in 1.4.
1581
1582 int java_lang_Thread::_name_offset = 0;
1583 int java_lang_Thread::_group_offset = 0;
1584 int java_lang_Thread::_contextClassLoader_offset = 0;
1585 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1586 int java_lang_Thread::_priority_offset = 0;
1587 int java_lang_Thread::_eetop_offset = 0;
1588 int java_lang_Thread::_daemon_offset = 0;
1589 int java_lang_Thread::_stillborn_offset = 0;
1590 int java_lang_Thread::_stackSize_offset = 0;
1591 int java_lang_Thread::_tid_offset = 0;
1592 int java_lang_Thread::_thread_status_offset = 0;
1593 int java_lang_Thread::_park_blocker_offset = 0;
1594 int java_lang_Thread::_park_event_offset = 0 ;
1595
1596 #define THREAD_FIELDS_DO(macro) \
1597 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1598 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1599 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1600 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1601 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1602 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1603 macro(_eetop_offset, k, "eetop", long_signature, false); \
1604 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1605 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1606 macro(_tid_offset, k, "tid", long_signature, false); \
1607 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1608 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1609 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false)
1610
1611 void java_lang_Thread::compute_offsets() {
1612 assert(_group_offset == 0, "offsets should be initialized only once");
1613
1614 InstanceKlass* k = SystemDictionary::Thread_klass();
1615 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1616 }
1617
1618 #if INCLUDE_CDS
1619 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1620 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1621 }
1622 #endif
1623
1624 JavaThread* java_lang_Thread::thread(oop java_thread) {
1625 return (JavaThread*)java_thread->address_field(_eetop_offset);
1626 }
1627
1628
1629 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1630 java_thread->address_field_put(_eetop_offset, (address)thread);
1631 }
1632
1633
1634 oop java_lang_Thread::name(oop java_thread) {
1635 return java_thread->obj_field(_name_offset);
1636 }
1637
1638
1639 void java_lang_Thread::set_name(oop java_thread, oop name) {
1640 java_thread->obj_field_put(_name_offset, name);
1641 }
1642
1643
1644 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1645 return (ThreadPriority)java_thread->int_field(_priority_offset);
1646 }
1647
1648
1649 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1650 java_thread->int_field_put(_priority_offset, priority);
1651 }
1652
1653
1654 oop java_lang_Thread::threadGroup(oop java_thread) {
1655 return java_thread->obj_field(_group_offset);
1656 }
1657
1658
1659 bool java_lang_Thread::is_stillborn(oop java_thread) {
1660 return java_thread->bool_field(_stillborn_offset) != 0;
1661 }
1662
1663
1664 // We never have reason to turn the stillborn bit off
1665 void java_lang_Thread::set_stillborn(oop java_thread) {
1666 java_thread->bool_field_put(_stillborn_offset, true);
1667 }
1668
1669
1670 bool java_lang_Thread::is_alive(oop java_thread) {
1671 JavaThread* thr = java_lang_Thread::thread(java_thread);
1672 return (thr != NULL);
1673 }
1674
1675
1676 bool java_lang_Thread::is_daemon(oop java_thread) {
1677 return java_thread->bool_field(_daemon_offset) != 0;
1678 }
1679
1680
1681 void java_lang_Thread::set_daemon(oop java_thread) {
1682 java_thread->bool_field_put(_daemon_offset, true);
1683 }
1684
1685 oop java_lang_Thread::context_class_loader(oop java_thread) {
1686 return java_thread->obj_field(_contextClassLoader_offset);
1687 }
1688
1689 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1690 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1691 }
1692
1693
1694 jlong java_lang_Thread::stackSize(oop java_thread) {
1695 if (_stackSize_offset > 0) {
1696 return java_thread->long_field(_stackSize_offset);
1697 } else {
1698 return 0;
1699 }
1700 }
1701
1702 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1703 void java_lang_Thread::set_thread_status(oop java_thread,
1704 java_lang_Thread::ThreadStatus status) {
1705 // The threadStatus is only present starting in 1.5
1706 if (_thread_status_offset > 0) {
1707 java_thread->int_field_put(_thread_status_offset, status);
1708 }
1709 }
1710
1711 // Read thread status value from threadStatus field in java.lang.Thread java class.
1712 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1713 // Make sure the caller is operating on behalf of the VM or is
1714 // running VM code (state == _thread_in_vm).
1715 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1716 JavaThread::current()->thread_state() == _thread_in_vm,
1717 "Java Thread is not running in vm");
1718 // The threadStatus is only present starting in 1.5
1719 if (_thread_status_offset > 0) {
1720 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1721 } else {
1722 // All we can easily figure out is if it is alive, but that is
1723 // enough info for a valid unknown status.
1724 // These aren't restricted to valid set ThreadStatus values, so
1725 // use JVMTI values and cast.
1726 JavaThread* thr = java_lang_Thread::thread(java_thread);
1727 if (thr == NULL) {
1728 // the thread hasn't run yet or is in the process of exiting
1729 return NEW;
1730 }
1731 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1732 }
1733 }
1734
1735
1736 jlong java_lang_Thread::thread_id(oop java_thread) {
1737 // The thread ID field is only present starting in 1.5
1738 if (_tid_offset > 0) {
1739 return java_thread->long_field(_tid_offset);
1740 } else {
1741 return 0;
1742 }
1743 }
1744
1745 oop java_lang_Thread::park_blocker(oop java_thread) {
1746 assert(JDK_Version::current().supports_thread_park_blocker() &&
1747 _park_blocker_offset != 0, "Must support parkBlocker field");
1748
1749 if (_park_blocker_offset > 0) {
1750 return java_thread->obj_field(_park_blocker_offset);
1751 }
1752
1753 return NULL;
1754 }
1755
1756 jlong java_lang_Thread::park_event(oop java_thread) {
1757 if (_park_event_offset > 0) {
1758 return java_thread->long_field(_park_event_offset);
1759 }
1760 return 0;
1761 }
1762
1763 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1764 if (_park_event_offset > 0) {
1765 java_thread->long_field_put(_park_event_offset, ptr);
1766 return true;
1767 }
1768 return false;
1769 }
1770
1771
1772 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1773 assert(_thread_status_offset != 0, "Must have thread status");
1774 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1775 switch (status) {
1776 case NEW : return "NEW";
1777 case RUNNABLE : return "RUNNABLE";
1778 case SLEEPING : return "TIMED_WAITING (sleeping)";
1779 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1780 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1781 case PARKED : return "WAITING (parking)";
1782 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1783 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1784 case TERMINATED : return "TERMINATED";
1785 default : return "UNKNOWN";
1786 };
1787 }
1788 int java_lang_ThreadGroup::_parent_offset = 0;
1789 int java_lang_ThreadGroup::_name_offset = 0;
1790 int java_lang_ThreadGroup::_threads_offset = 0;
1791 int java_lang_ThreadGroup::_groups_offset = 0;
1792 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1793 int java_lang_ThreadGroup::_destroyed_offset = 0;
1794 int java_lang_ThreadGroup::_daemon_offset = 0;
1795 int java_lang_ThreadGroup::_nthreads_offset = 0;
1796 int java_lang_ThreadGroup::_ngroups_offset = 0;
1797
1798 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1799 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1800 return java_thread_group->obj_field(_parent_offset);
1801 }
1802
1803 // ("name as oop" accessor is not necessary)
1804
1805 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1806 oop name = java_thread_group->obj_field(_name_offset);
1807 // ThreadGroup.name can be null
1808 if (name != NULL) {
1809 return java_lang_String::as_utf8_string(name);
1810 }
1811 return NULL;
1812 }
1813
1814 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1815 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1816 return java_thread_group->int_field(_nthreads_offset);
1817 }
1818
1819 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1820 oop threads = java_thread_group->obj_field(_threads_offset);
1821 assert(threads != NULL, "threadgroups should have threads");
1822 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1823 return objArrayOop(threads);
1824 }
1825
1826 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1827 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1828 return java_thread_group->int_field(_ngroups_offset);
1829 }
1830
1831 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1832 oop groups = java_thread_group->obj_field(_groups_offset);
1833 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1834 return objArrayOop(groups);
1835 }
1836
1837 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1838 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1839 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1840 }
1841
1842 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1843 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1844 return java_thread_group->bool_field(_destroyed_offset) != 0;
1845 }
1846
1847 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1848 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1849 return java_thread_group->bool_field(_daemon_offset) != 0;
1850 }
1851
1852 #define THREADGROUP_FIELDS_DO(macro) \
1853 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1854 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1855 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1856 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1857 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1858 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1859 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1860 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1861 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1862
1863 void java_lang_ThreadGroup::compute_offsets() {
1864 assert(_parent_offset == 0, "offsets should be initialized only once");
1865
1866 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1867 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1868 }
1869
1870 #if INCLUDE_CDS
1871 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1872 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1873 }
1874 #endif
1875
1876 #define THROWABLE_FIELDS_DO(macro) \
1877 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1878 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1879 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1880 macro(depth_offset, k, "depth", int_signature, false); \
1881 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1882
1883 void java_lang_Throwable::compute_offsets() {
1884 InstanceKlass* k = SystemDictionary::Throwable_klass();
1885 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1886 }
1887
1888 #if INCLUDE_CDS
1889 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1890 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1891 }
1892 #endif
1893
1894 oop java_lang_Throwable::unassigned_stacktrace() {
1895 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1896 oop base = ik->static_field_base_raw();
1897 return base->obj_field(static_unassigned_stacktrace_offset);
1898 }
1899
1900 oop java_lang_Throwable::backtrace(oop throwable) {
1901 return throwable->obj_field_acquire(backtrace_offset);
1902 }
1903
1904
1905 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1906 throwable->release_obj_field_put(backtrace_offset, value);
1907 }
1908
1909 int java_lang_Throwable::depth(oop throwable) {
1910 return throwable->int_field(depth_offset);
1911 }
1912
1913 void java_lang_Throwable::set_depth(oop throwable, int value) {
1914 throwable->int_field_put(depth_offset, value);
1915 }
1916
1917 oop java_lang_Throwable::message(oop throwable) {
1918 return throwable->obj_field(detailMessage_offset);
1919 }
1920
1921
1922 // Return Symbol for detailed_message or NULL
1923 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1924 PRESERVE_EXCEPTION_MARK; // Keep original exception
1925 oop detailed_message = java_lang_Throwable::message(throwable);
1926 if (detailed_message != NULL) {
1927 return java_lang_String::as_symbol(detailed_message, THREAD);
1928 }
1929 return NULL;
1930 }
1931
1932 void java_lang_Throwable::set_message(oop throwable, oop value) {
1933 throwable->obj_field_put(detailMessage_offset, value);
1934 }
1935
1936
1937 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1938 throwable->obj_field_put(stackTrace_offset, st_element_array);
1939 }
1940
1941 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1942 set_stacktrace(throwable, NULL);
1943 }
1944
1945
1946 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1947 ResourceMark rm;
1948 Klass* k = throwable->klass();
1949 assert(k != NULL, "just checking");
1950 st->print("%s", k->external_name());
1951 oop msg = message(throwable);
1952 if (msg != NULL) {
1953 st->print(": %s", java_lang_String::as_utf8_string(msg));
1954 }
1955 }
1956
1957 // After this many redefines, the stack trace is unreliable.
1958 const int MAX_VERSION = USHRT_MAX;
1959
1960 static inline bool version_matches(Method* method, int version) {
1961 assert(version < MAX_VERSION, "version is too big");
1962 return method != NULL && (method->constants()->version() == version);
1963 }
1964
1965
1966 // This class provides a simple wrapper over the internal structure of
1967 // exception backtrace to insulate users of the backtrace from needing
1968 // to know what it looks like.
1969 class BacktraceBuilder: public StackObj {
1970 friend class BacktraceIterator;
1971 private:
1972 Handle _backtrace;
1973 objArrayOop _head;
1974 typeArrayOop _methods;
1975 typeArrayOop _bcis;
1976 objArrayOop _mirrors;
1977 typeArrayOop _names; // needed to insulate method name against redefinition
1978 int _index;
1979 NoSafepointVerifier _nsv;
1980
1981 enum {
1982 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1983 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1984 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1985 trace_names_offset = java_lang_Throwable::trace_names_offset,
1986 trace_next_offset = java_lang_Throwable::trace_next_offset,
1987 trace_size = java_lang_Throwable::trace_size,
1988 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1989 };
1990
1991 // get info out of chunks
1992 static typeArrayOop get_methods(objArrayHandle chunk) {
1993 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1994 assert(methods != NULL, "method array should be initialized in backtrace");
1995 return methods;
1996 }
1997 static typeArrayOop get_bcis(objArrayHandle chunk) {
1998 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1999 assert(bcis != NULL, "bci array should be initialized in backtrace");
2000 return bcis;
2001 }
2002 static objArrayOop get_mirrors(objArrayHandle chunk) {
2003 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2004 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2005 return mirrors;
2006 }
2007 static typeArrayOop get_names(objArrayHandle chunk) {
2008 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2009 assert(names != NULL, "names array should be initialized in backtrace");
2010 return names;
2011 }
2012
2013 public:
2014
2015 // constructor for new backtrace
2016 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2017 expand(CHECK);
2018 _backtrace = Handle(THREAD, _head);
2019 _index = 0;
2020 }
2021
2022 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2023 _methods = get_methods(backtrace);
2024 _bcis = get_bcis(backtrace);
2025 _mirrors = get_mirrors(backtrace);
2026 _names = get_names(backtrace);
2027 assert(_methods->length() == _bcis->length() &&
2028 _methods->length() == _mirrors->length() &&
2029 _mirrors->length() == _names->length(),
2030 "method and source information arrays should match");
2031
2032 // head is the preallocated backtrace
2033 _head = backtrace();
2034 _backtrace = Handle(thread, _head);
2035 _index = 0;
2036 }
2037
2038 void expand(TRAPS) {
2039 objArrayHandle old_head(THREAD, _head);
2040 PauseNoSafepointVerifier pnsv(&_nsv);
2041
2042 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2043 objArrayHandle new_head(THREAD, head);
2044
2045 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2046 typeArrayHandle new_methods(THREAD, methods);
2047
2048 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2049 typeArrayHandle new_bcis(THREAD, bcis);
2050
2051 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2052 objArrayHandle new_mirrors(THREAD, mirrors);
2053
2054 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2055 typeArrayHandle new_names(THREAD, names);
2056
2057 if (!old_head.is_null()) {
2058 old_head->obj_at_put(trace_next_offset, new_head());
2059 }
2060 new_head->obj_at_put(trace_methods_offset, new_methods());
2061 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2062 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2063 new_head->obj_at_put(trace_names_offset, new_names());
2064
2065 _head = new_head();
2066 _methods = new_methods();
2067 _bcis = new_bcis();
2068 _mirrors = new_mirrors();
2069 _names = new_names();
2070 _index = 0;
2071 }
2072
2073 oop backtrace() {
2074 return _backtrace();
2075 }
2076
2077 inline void push(Method* method, int bci, TRAPS) {
2078 // Smear the -1 bci to 0 since the array only holds unsigned
2079 // shorts. The later line number lookup would just smear the -1
2080 // to a 0 even if it could be recorded.
2081 if (bci == SynchronizationEntryBCI) bci = 0;
2082
2083 if (_index >= trace_chunk_size) {
2084 methodHandle mhandle(THREAD, method);
2085 expand(CHECK);
2086 method = mhandle();
2087 }
2088
2089 _methods->ushort_at_put(_index, method->orig_method_idnum());
2090 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2091
2092 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2093 // klass owning the symbols alive so their refcounts aren't decremented.
2094 Symbol* name = method->name();
2095 _names->symbol_at_put(_index, name);
2096
2097 // We need to save the mirrors in the backtrace to keep the class
2098 // from being unloaded while we still have this stack trace.
2099 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2100 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2101 _index++;
2102 }
2103
2104 };
2105
2106 struct BacktraceElement : public StackObj {
2107 int _method_id;
2108 int _bci;
2109 int _version;
2110 Symbol* _name;
2111 Handle _mirror;
2112 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2113 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2114 };
2115
2116 class BacktraceIterator : public StackObj {
2117 int _index;
2118 objArrayHandle _result;
2119 objArrayHandle _mirrors;
2120 typeArrayHandle _methods;
2121 typeArrayHandle _bcis;
2122 typeArrayHandle _names;
2123
2124 void init(objArrayHandle result, Thread* thread) {
2125 // Get method id, bci, version and mirror from chunk
2126 _result = result;
2127 if (_result.not_null()) {
2128 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2129 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2130 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2131 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2132 _index = 0;
2133 }
2134 }
2135 public:
2136 BacktraceIterator(objArrayHandle result, Thread* thread) {
2137 init(result, thread);
2138 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2139 }
2140
2141 BacktraceElement next(Thread* thread) {
2142 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2143 _methods->ushort_at(_index),
2144 Backtrace::version_at(_bcis->int_at(_index)),
2145 Backtrace::bci_at(_bcis->int_at(_index)),
2146 _names->symbol_at(_index));
2147 _index++;
2148
2149 if (_index >= java_lang_Throwable::trace_chunk_size) {
2150 int next_offset = java_lang_Throwable::trace_next_offset;
2151 // Get next chunk
2152 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2153 init(result, thread);
2154 }
2155 return e;
2156 }
2157
2158 bool repeat() {
2159 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2160 }
2161 };
2162
2163
2164 // Print stack trace element to resource allocated buffer
2165 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2166 int version, int bci, Symbol* name) {
2167 ResourceMark rm;
2168
2169 // Get strings and string lengths
2170 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2171 const char* klass_name = holder->external_name();
2172 int buf_len = (int)strlen(klass_name);
2173
2174 char* method_name = name->as_C_string();
2175 buf_len += (int)strlen(method_name);
2176
2177 char* source_file_name = NULL;
2178 Symbol* source = Backtrace::get_source_file_name(holder, version);
2179 if (source != NULL) {
2180 source_file_name = source->as_C_string();
2181 buf_len += (int)strlen(source_file_name);
2182 }
2183
2184 char *module_name = NULL, *module_version = NULL;
2185 ModuleEntry* module = holder->module();
2186 if (module->is_named()) {
2187 module_name = module->name()->as_C_string();
2188 buf_len += (int)strlen(module_name);
2189 if (module->version() != NULL) {
2190 module_version = module->version()->as_C_string();
2191 buf_len += (int)strlen(module_version);
2192 }
2193 }
2194
2195 // Allocate temporary buffer with extra space for formatting and line number
2196 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2197
2198 // Print stack trace line in buffer
2199 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2200
2201 // Print module information
2202 if (module_name != NULL) {
2203 if (module_version != NULL) {
2204 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2205 } else {
2206 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2207 }
2208 }
2209
2210 // The method can be NULL if the requested class version is gone
2211 Method* method = holder->method_with_orig_idnum(method_id, version);
2212 if (!version_matches(method, version)) {
2213 strcat(buf, "Redefined)");
2214 } else {
2215 int line_number = Backtrace::get_line_number(method, bci);
2216 if (line_number == -2) {
2217 strcat(buf, "Native Method)");
2218 } else {
2219 if (source_file_name != NULL && (line_number != -1)) {
2220 // Sourcename and linenumber
2221 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2222 } else if (source_file_name != NULL) {
2223 // Just sourcename
2224 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2225 } else {
2226 // Neither sourcename nor linenumber
2227 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2228 }
2229 CompiledMethod* nm = method->code();
2230 if (WizardMode && nm != NULL) {
2231 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2232 }
2233 }
2234 }
2235
2236 st->print_cr("%s", buf);
2237 }
2238
2239 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2240 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2241 int method_id = method->orig_method_idnum();
2242 int version = method->constants()->version();
2243 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2244 }
2245
2246 /**
2247 * Print the throwable message and its stack trace plus all causes by walking the
2248 * cause chain. The output looks the same as of Throwable.printStackTrace().
2249 */
2250 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2251 // First, print the message.
2252 print(throwable(), st);
2253 st->cr();
2254
2255 // Now print the stack trace.
2256 Thread* THREAD = Thread::current();
2257 while (throwable.not_null()) {
2258 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2259 if (result.is_null()) {
2260 st->print_raw_cr("\t<<no stack trace available>>");
2261 return;
2262 }
2263 BacktraceIterator iter(result, THREAD);
2264
2265 while (iter.repeat()) {
2266 BacktraceElement bte = iter.next(THREAD);
2267 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2268 }
2269 {
2270 // Call getCause() which doesn't necessarily return the _cause field.
2271 EXCEPTION_MARK;
2272 JavaValue cause(T_OBJECT);
2273 JavaCalls::call_virtual(&cause,
2274 throwable,
2275 throwable->klass(),
2276 vmSymbols::getCause_name(),
2277 vmSymbols::void_throwable_signature(),
2278 THREAD);
2279 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2280 if (HAS_PENDING_EXCEPTION) {
2281 CLEAR_PENDING_EXCEPTION;
2282 throwable = Handle();
2283 } else {
2284 throwable = Handle(THREAD, (oop) cause.get_jobject());
2285 if (throwable.not_null()) {
2286 st->print("Caused by: ");
2287 print(throwable(), st);
2288 st->cr();
2289 }
2290 }
2291 }
2292 }
2293 }
2294
2295 /**
2296 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2297 */
2298 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2299 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2300 JavaValue result(T_VOID);
2301 JavaCalls::call_virtual(&result,
2302 throwable,
2303 SystemDictionary::Throwable_klass(),
2304 vmSymbols::printStackTrace_name(),
2305 vmSymbols::void_method_signature(),
2306 THREAD);
2307 }
2308
2309 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2310 if (!StackTraceInThrowable) return;
2311 ResourceMark rm(THREAD);
2312
2313 // Start out by clearing the backtrace for this object, in case the VM
2314 // runs out of memory while allocating the stack trace
2315 set_backtrace(throwable(), NULL);
2316 // Clear lazily constructed Java level stacktrace if refilling occurs
2317 // This is unnecessary in 1.7+ but harmless
2318 clear_stacktrace(throwable());
2319
2320 int max_depth = MaxJavaStackTraceDepth;
2321 JavaThread* thread = (JavaThread*)THREAD;
2322
2323 BacktraceBuilder bt(CHECK);
2324
2325 // If there is no Java frame just return the method that was being called
2326 // with bci 0
2327 if (!thread->has_last_Java_frame()) {
2328 if (max_depth >= 1 && method() != NULL) {
2329 bt.push(method(), 0, CHECK);
2330 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2331 set_depth(throwable(), 1);
2332 set_backtrace(throwable(), bt.backtrace());
2333 }
2334 return;
2335 }
2336
2337 // Instead of using vframe directly, this version of fill_in_stack_trace
2338 // basically handles everything by hand. This significantly improved the
2339 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2340 // See bug 6333838 for more details.
2341 // The "ASSERT" here is to verify this method generates the exactly same stack
2342 // trace as utilizing vframe.
2343 #ifdef ASSERT
2344 vframeStream st(thread);
2345 methodHandle st_method(THREAD, st.method());
2346 #endif
2347 int total_count = 0;
2348 RegisterMap map(thread, false);
2349 int decode_offset = 0;
2350 CompiledMethod* nm = NULL;
2351 bool skip_fillInStackTrace_check = false;
2352 bool skip_throwableInit_check = false;
2353 bool skip_hidden = !ShowHiddenFrames;
2354
2355 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2356 Method* method = NULL;
2357 int bci = 0;
2358
2359 // Compiled java method case.
2360 if (decode_offset != 0) {
2361 DebugInfoReadStream stream(nm, decode_offset);
2362 decode_offset = stream.read_int();
2363 method = (Method*)nm->metadata_at(stream.read_int());
2364 bci = stream.read_bci();
2365 } else {
2366 if (fr.is_first_frame()) break;
2367 address pc = fr.pc();
2368 if (fr.is_interpreted_frame()) {
2369 address bcp = fr.interpreter_frame_bcp();
2370 method = fr.interpreter_frame_method();
2371 bci = method->bci_from(bcp);
2372 fr = fr.sender(&map);
2373 } else {
2374 CodeBlob* cb = fr.cb();
2375 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2376 // but non nmethod
2377 fr = fr.sender(&map);
2378 if (cb == NULL || !cb->is_compiled()) {
2379 continue;
2380 }
2381 nm = cb->as_compiled_method();
2382 if (nm->method()->is_native()) {
2383 method = nm->method();
2384 bci = 0;
2385 } else {
2386 PcDesc* pd = nm->pc_desc_at(pc);
2387 decode_offset = pd->scope_decode_offset();
2388 // if decode_offset is not equal to 0, it will execute the
2389 // "compiled java method case" at the beginning of the loop.
2390 continue;
2391 }
2392 }
2393 }
2394 #ifdef ASSERT
2395 assert(st_method() == method && st.bci() == bci,
2396 "Wrong stack trace");
2397 st.next();
2398 // vframeStream::method isn't GC-safe so store off a copy
2399 // of the Method* in case we GC.
2400 if (!st.at_end()) {
2401 st_method = st.method();
2402 }
2403 #endif
2404
2405 // the format of the stacktrace will be:
2406 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2407 // - 0 or more <init> methods for the exception class (skipped)
2408 // - rest of the stack
2409
2410 if (!skip_fillInStackTrace_check) {
2411 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2412 throwable->is_a(method->method_holder())) {
2413 continue;
2414 }
2415 else {
2416 skip_fillInStackTrace_check = true; // gone past them all
2417 }
2418 }
2419 if (!skip_throwableInit_check) {
2420 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2421
2422 // skip <init> methods of the exception class and superclasses
2423 // This is simlar to classic VM.
2424 if (method->name() == vmSymbols::object_initializer_name() &&
2425 throwable->is_a(method->method_holder())) {
2426 continue;
2427 } else {
2428 // there are none or we've seen them all - either way stop checking
2429 skip_throwableInit_check = true;
2430 }
2431 }
2432 if (method->is_hidden()) {
2433 if (skip_hidden) continue;
2434 }
2435 bt.push(method, bci, CHECK);
2436 total_count++;
2437 }
2438
2439 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2440
2441 // Put completed stack trace into throwable object
2442 set_backtrace(throwable(), bt.backtrace());
2443 set_depth(throwable(), total_count);
2444 }
2445
2446 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2447 // No-op if stack trace is disabled
2448 if (!StackTraceInThrowable) {
2449 return;
2450 }
2451
2452 // Disable stack traces for some preallocated out of memory errors
2453 if (!Universe::should_fill_in_stack_trace(throwable)) {
2454 return;
2455 }
2456
2457 PRESERVE_EXCEPTION_MARK;
2458
2459 JavaThread* thread = JavaThread::active();
2460 fill_in_stack_trace(throwable, method, thread);
2461 // ignore exceptions thrown during stack trace filling
2462 CLEAR_PENDING_EXCEPTION;
2463 }
2464
2465 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2466 // Allocate stack trace - backtrace is created but not filled in
2467
2468 // No-op if stack trace is disabled
2469 if (!StackTraceInThrowable) return;
2470 BacktraceBuilder bt(CHECK); // creates a backtrace
2471 set_backtrace(throwable(), bt.backtrace());
2472 }
2473
2474
2475 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2476 // Fill in stack trace into preallocated backtrace (no GC)
2477
2478 // No-op if stack trace is disabled
2479 if (!StackTraceInThrowable) return;
2480
2481 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2482
2483 JavaThread* THREAD = JavaThread::current();
2484
2485 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2486 assert(backtrace.not_null(), "backtrace should have been preallocated");
2487
2488 ResourceMark rm(THREAD);
2489 vframeStream st(THREAD);
2490
2491 BacktraceBuilder bt(THREAD, backtrace);
2492
2493 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2494 // methods as preallocated errors aren't created by "java" code.
2495
2496 // fill in as much stack trace as possible
2497 int chunk_count = 0;
2498 for (;!st.at_end(); st.next()) {
2499 bt.push(st.method(), st.bci(), CHECK);
2500 chunk_count++;
2501
2502 // Bail-out for deep stacks
2503 if (chunk_count >= trace_chunk_size) break;
2504 }
2505 set_depth(throwable(), chunk_count);
2506 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2507
2508 // We support the Throwable immutability protocol defined for Java 7.
2509 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2510 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2511 }
2512
2513 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2514 objArrayHandle stack_trace_array_h, TRAPS) {
2515
2516 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2517 THROW(vmSymbols::java_lang_NullPointerException());
2518 }
2519
2520 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2521
2522 if (stack_trace_array_h->length() != depth(throwable())) {
2523 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2524 }
2525
2526 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2527 BacktraceIterator iter(result, THREAD);
2528
2529 int index = 0;
2530 while (iter.repeat()) {
2531 BacktraceElement bte = iter.next(THREAD);
2532
2533 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2534
2535 if (stack_trace_element.is_null()) {
2536 THROW(vmSymbols::java_lang_NullPointerException());
2537 }
2538
2539 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2540 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2541
2542 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2543 method,
2544 bte._version,
2545 bte._bci,
2546 bte._name, CHECK);
2547 }
2548 }
2549
2550 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2551 // Allocate java.lang.StackTraceElement instance
2552 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2553 assert(k != NULL, "must be loaded in 1.4+");
2554 if (k->should_be_initialized()) {
2555 k->initialize(CHECK_0);
2556 }
2557
2558 Handle element = k->allocate_instance_handle(CHECK_0);
2559
2560 int version = method->constants()->version();
2561 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2562 return element();
2563 }
2564
2565 void java_lang_StackTraceElement::fill_in(Handle element,
2566 InstanceKlass* holder, const methodHandle& method,
2567 int version, int bci, Symbol* name, TRAPS) {
2568 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2569
2570 ResourceMark rm(THREAD);
2571 HandleMark hm(THREAD);
2572
2573 // Fill in class name
2574 Handle java_class(THREAD, holder->java_mirror());
2575 oop classname = java_lang_Class::name(java_class, CHECK);
2576 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2577 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2578
2579 oop loader = holder->class_loader();
2580 if (loader != NULL) {
2581 oop loader_name = java_lang_ClassLoader::name(loader);
2582 if (loader_name != NULL)
2583 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2584 }
2585
2586 // Fill in method name
2587 oop methodname = StringTable::intern(name, CHECK);
2588 java_lang_StackTraceElement::set_methodName(element(), methodname);
2589
2590 // Fill in module name and version
2591 ModuleEntry* module = holder->module();
2592 if (module->is_named()) {
2593 oop module_name = StringTable::intern(module->name(), CHECK);
2594 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2595 oop module_version;
2596 if (module->version() != NULL) {
2597 module_version = StringTable::intern(module->version(), CHECK);
2598 } else {
2599 module_version = NULL;
2600 }
2601 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2602 }
2603
2604 if (method() == NULL || !version_matches(method(), version)) {
2605 // The method was redefined, accurate line number information isn't available
2606 java_lang_StackTraceElement::set_fileName(element(), NULL);
2607 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2608 } else {
2609 // Fill in source file name and line number.
2610 Symbol* source = Backtrace::get_source_file_name(holder, version);
2611 oop source_file = java_lang_Class::source_file(java_class());
2612 if (source != NULL) {
2613 // Class was not redefined. We can trust its cache if set,
2614 // else we have to initialize it.
2615 if (source_file == NULL) {
2616 source_file = StringTable::intern(source, CHECK);
2617 java_lang_Class::set_source_file(java_class(), source_file);
2618 }
2619 } else {
2620 // Class was redefined. Dump the cache if it was set.
2621 if (source_file != NULL) {
2622 source_file = NULL;
2623 java_lang_Class::set_source_file(java_class(), source_file);
2624 }
2625 if (ShowHiddenFrames) {
2626 source = vmSymbols::unknown_class_name();
2627 source_file = StringTable::intern(source, CHECK);
2628 }
2629 }
2630 java_lang_StackTraceElement::set_fileName(element(), source_file);
2631
2632 int line_number = Backtrace::get_line_number(method, bci);
2633 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2634 }
2635 }
2636
2637 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2638 HandleMark hm(THREAD);
2639 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2640 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2641 // we should expand MemberName::name when Throwable uses StackTrace
2642 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2643 return method;
2644 }
2645
2646 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2647 // set Method* or mid/cpref
2648 HandleMark hm(THREAD);
2649 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2650 InstanceKlass* ik = method->method_holder();
2651 CallInfo info(method(), ik, CHECK);
2652 MethodHandles::init_method_MemberName(mname, info);
2653 // set bci
2654 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2655 // method may be redefined; store the version
2656 int version = method->constants()->version();
2657 assert((jushort)version == version, "version should be short");
2658 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2659 }
2660
2661 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2662 ResourceMark rm(THREAD);
2663 HandleMark hm(THREAD);
2664 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2665 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2666 InstanceKlass* holder = InstanceKlass::cast(clazz);
2667 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2668
2669 short version = stackFrame->short_field(_version_offset);
2670 short bci = stackFrame->short_field(_bci_offset);
2671 Symbol* name = method->name();
2672 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2673 }
2674
2675 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2676 macro(_memberName_offset, k, "memberName", object_signature, false); \
2677 macro(_bci_offset, k, "bci", short_signature, false)
2678
2679 void java_lang_StackFrameInfo::compute_offsets() {
2680 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2681 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2682 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2683 }
2684
2685 #if INCLUDE_CDS
2686 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2687 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2688 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2689 }
2690 #endif
2691
2692 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2693 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2694 macro(_locals_offset, k, "locals", object_array_signature, false); \
2695 macro(_operands_offset, k, "operands", object_array_signature, false); \
2696 macro(_mode_offset, k, "mode", int_signature, false)
2697
2698 void java_lang_LiveStackFrameInfo::compute_offsets() {
2699 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2700 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2701 }
2702
2703 #if INCLUDE_CDS
2704 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2705 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2706 }
2707 #endif
2708
2709 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2710 macro(override_offset, k, "override", bool_signature, false)
2711
2712 void java_lang_reflect_AccessibleObject::compute_offsets() {
2713 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2714 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2715 }
2716
2717 #if INCLUDE_CDS
2718 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2719 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2720 }
2721 #endif
2722
2723 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2724 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2725 return (jboolean) reflect->bool_field(override_offset);
2726 }
2727
2728 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2729 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2730 reflect->bool_field_put(override_offset, (int) value);
2731 }
2732
2733 #define METHOD_FIELDS_DO(macro) \
2734 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2735 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2736 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2737 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2738 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2739 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2740 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2741 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2742 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2743 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2744 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2745
2746 void java_lang_reflect_Method::compute_offsets() {
2747 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2748 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2749 }
2750
2751 #if INCLUDE_CDS
2752 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2753 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2754 }
2755 #endif
2756
2757 Handle java_lang_reflect_Method::create(TRAPS) {
2758 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2759 Klass* klass = SystemDictionary::reflect_Method_klass();
2760 // This class is eagerly initialized during VM initialization, since we keep a refence
2761 // to one of the methods
2762 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2763 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2764 }
2765
2766 oop java_lang_reflect_Method::clazz(oop reflect) {
2767 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2768 return reflect->obj_field(clazz_offset);
2769 }
2770
2771 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2772 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2773 reflect->obj_field_put(clazz_offset, value);
2774 }
2775
2776 int java_lang_reflect_Method::slot(oop reflect) {
2777 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2778 return reflect->int_field(slot_offset);
2779 }
2780
2781 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2782 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2783 reflect->int_field_put(slot_offset, value);
2784 }
2785
2786 void java_lang_reflect_Method::set_name(oop method, oop value) {
2787 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2788 method->obj_field_put(name_offset, value);
2789 }
2790
2791 oop java_lang_reflect_Method::return_type(oop method) {
2792 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2793 return method->obj_field(returnType_offset);
2794 }
2795
2796 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2797 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2798 method->obj_field_put(returnType_offset, value);
2799 }
2800
2801 oop java_lang_reflect_Method::parameter_types(oop method) {
2802 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2803 return method->obj_field(parameterTypes_offset);
2804 }
2805
2806 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2807 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2808 method->obj_field_put(parameterTypes_offset, value);
2809 }
2810
2811 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2812 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2813 method->obj_field_put(exceptionTypes_offset, value);
2814 }
2815
2816 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2817 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2818 method->int_field_put(modifiers_offset, value);
2819 }
2820
2821 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2822 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2823 method->obj_field_put(signature_offset, value);
2824 }
2825
2826 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2827 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2828 method->obj_field_put(annotations_offset, value);
2829 }
2830
2831 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2832 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2833 method->obj_field_put(parameter_annotations_offset, value);
2834 }
2835
2836 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2837 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2838 method->obj_field_put(annotation_default_offset, value);
2839 }
2840
2841 #define CONSTRUCTOR_FIELDS_DO(macro) \
2842 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2843 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2844 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2845 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2846 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2847 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2848 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2849 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2850
2851 void java_lang_reflect_Constructor::compute_offsets() {
2852 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2853 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2854 }
2855
2856 #if INCLUDE_CDS
2857 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2858 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2859 }
2860 #endif
2861
2862 Handle java_lang_reflect_Constructor::create(TRAPS) {
2863 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2864 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2865 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2866 InstanceKlass* ik = InstanceKlass::cast(k);
2867 // Ensure it is initialized
2868 ik->initialize(CHECK_NH);
2869 return ik->allocate_instance_handle(THREAD);
2870 }
2871
2872 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2873 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2874 return reflect->obj_field(clazz_offset);
2875 }
2876
2877 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2878 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2879 reflect->obj_field_put(clazz_offset, value);
2880 }
2881
2882 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2883 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2884 return constructor->obj_field(parameterTypes_offset);
2885 }
2886
2887 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2888 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2889 constructor->obj_field_put(parameterTypes_offset, value);
2890 }
2891
2892 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2893 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2894 constructor->obj_field_put(exceptionTypes_offset, value);
2895 }
2896
2897 int java_lang_reflect_Constructor::slot(oop reflect) {
2898 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2899 return reflect->int_field(slot_offset);
2900 }
2901
2902 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2903 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2904 reflect->int_field_put(slot_offset, value);
2905 }
2906
2907 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2908 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2909 constructor->int_field_put(modifiers_offset, value);
2910 }
2911
2912 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2913 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2914 constructor->obj_field_put(signature_offset, value);
2915 }
2916
2917 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2918 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2919 constructor->obj_field_put(annotations_offset, value);
2920 }
2921
2922 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2923 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2924 method->obj_field_put(parameter_annotations_offset, value);
2925 }
2926
2927 #define FIELD_FIELDS_DO(macro) \
2928 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2929 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2930 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
2931 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2932 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2933 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2934 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
2935
2936 void java_lang_reflect_Field::compute_offsets() {
2937 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
2938 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2939 }
2940
2941 #if INCLUDE_CDS
2942 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
2943 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2944 }
2945 #endif
2946
2947 Handle java_lang_reflect_Field::create(TRAPS) {
2948 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2949 Symbol* name = vmSymbols::java_lang_reflect_Field();
2950 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2951 InstanceKlass* ik = InstanceKlass::cast(k);
2952 // Ensure it is initialized
2953 ik->initialize(CHECK_NH);
2954 return ik->allocate_instance_handle(THREAD);
2955 }
2956
2957 oop java_lang_reflect_Field::clazz(oop reflect) {
2958 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2959 return reflect->obj_field(clazz_offset);
2960 }
2961
2962 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2963 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2964 reflect->obj_field_put(clazz_offset, value);
2965 }
2966
2967 oop java_lang_reflect_Field::name(oop field) {
2968 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2969 return field->obj_field(name_offset);
2970 }
2971
2972 void java_lang_reflect_Field::set_name(oop field, oop value) {
2973 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2974 field->obj_field_put(name_offset, value);
2975 }
2976
2977 oop java_lang_reflect_Field::type(oop field) {
2978 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2979 return field->obj_field(type_offset);
2980 }
2981
2982 void java_lang_reflect_Field::set_type(oop field, oop value) {
2983 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2984 field->obj_field_put(type_offset, value);
2985 }
2986
2987 int java_lang_reflect_Field::slot(oop reflect) {
2988 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2989 return reflect->int_field(slot_offset);
2990 }
2991
2992 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2993 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2994 reflect->int_field_put(slot_offset, value);
2995 }
2996
2997 int java_lang_reflect_Field::modifiers(oop field) {
2998 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2999 return field->int_field(modifiers_offset);
3000 }
3001
3002 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3003 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3004 field->int_field_put(modifiers_offset, value);
3005 }
3006
3007 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3008 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3009 field->obj_field_put(signature_offset, value);
3010 }
3011
3012 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3013 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3014 field->obj_field_put(annotations_offset, value);
3015 }
3016
3017 #define CONSTANTPOOL_FIELDS_DO(macro) \
3018 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3019
3020 void reflect_ConstantPool::compute_offsets() {
3021 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3022 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3023 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3024 }
3025
3026 #if INCLUDE_CDS
3027 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3028 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3029 }
3030 #endif
3031
3032 #define PARAMETER_FIELDS_DO(macro) \
3033 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3034 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3035 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3036 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3037
3038 void java_lang_reflect_Parameter::compute_offsets() {
3039 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3040 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3041 }
3042
3043 #if INCLUDE_CDS
3044 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3045 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3046 }
3047 #endif
3048
3049 Handle java_lang_reflect_Parameter::create(TRAPS) {
3050 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3051 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3052 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3053 InstanceKlass* ik = InstanceKlass::cast(k);
3054 // Ensure it is initialized
3055 ik->initialize(CHECK_NH);
3056 return ik->allocate_instance_handle(THREAD);
3057 }
3058
3059 oop java_lang_reflect_Parameter::name(oop param) {
3060 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3061 return param->obj_field(name_offset);
3062 }
3063
3064 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3065 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3066 param->obj_field_put(name_offset, value);
3067 }
3068
3069 int java_lang_reflect_Parameter::modifiers(oop param) {
3070 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3071 return param->int_field(modifiers_offset);
3072 }
3073
3074 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3075 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3076 param->int_field_put(modifiers_offset, value);
3077 }
3078
3079 int java_lang_reflect_Parameter::index(oop param) {
3080 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3081 return param->int_field(index_offset);
3082 }
3083
3084 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3085 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3086 param->int_field_put(index_offset, value);
3087 }
3088
3089 oop java_lang_reflect_Parameter::executable(oop param) {
3090 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3091 return param->obj_field(executable_offset);
3092 }
3093
3094 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3095 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3096 param->obj_field_put(executable_offset, value);
3097 }
3098
3099
3100 int java_lang_Module::loader_offset;
3101 int java_lang_Module::name_offset;
3102 int java_lang_Module::_module_entry_offset = -1;
3103
3104 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3105 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3106 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3107 vmSymbols::java_lang_module_init_signature(),
3108 loader, module_name, CHECK_NH);
3109 }
3110
3111 #define MODULE_FIELDS_DO(macro) \
3112 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3113 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3114
3115 void java_lang_Module::compute_offsets() {
3116 InstanceKlass* k = SystemDictionary::Module_klass();
3117 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3118 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3119 }
3120
3121 #if INCLUDE_CDS
3122 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3123 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3124 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3125 }
3126 #endif
3127
3128 oop java_lang_Module::loader(oop module) {
3129 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3130 return module->obj_field(loader_offset);
3131 }
3132
3133 void java_lang_Module::set_loader(oop module, oop value) {
3134 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3135 module->obj_field_put(loader_offset, value);
3136 }
3137
3138 oop java_lang_Module::name(oop module) {
3139 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3140 return module->obj_field(name_offset);
3141 }
3142
3143 void java_lang_Module::set_name(oop module, oop value) {
3144 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3145 module->obj_field_put(name_offset, value);
3146 }
3147
3148 ModuleEntry* java_lang_Module::module_entry(oop module) {
3149 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3150 assert(module != NULL, "module can't be null");
3151 assert(oopDesc::is_oop(module), "module must be oop");
3152
3153 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3154 if (module_entry == NULL) {
3155 // If the inject field containing the ModuleEntry* is null then return the
3156 // class loader's unnamed module.
3157 oop loader = java_lang_Module::loader(module);
3158 Handle h_loader = Handle(Thread::current(), loader);
3159 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3160 return loader_cld->unnamed_module();
3161 }
3162 return module_entry;
3163 }
3164
3165 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3166 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3167 assert(module != NULL, "module can't be null");
3168 assert(oopDesc::is_oop(module), "module must be oop");
3169 module->address_field_put(_module_entry_offset, (address)module_entry);
3170 }
3171
3172 Handle reflect_ConstantPool::create(TRAPS) {
3173 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3174 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3175 // Ensure it is initialized
3176 k->initialize(CHECK_NH);
3177 return k->allocate_instance_handle(THREAD);
3178 }
3179
3180
3181 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3182 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3183 oop mirror = value->pool_holder()->java_mirror();
3184 // Save the mirror to get back the constant pool.
3185 reflect->obj_field_put(_oop_offset, mirror);
3186 }
3187
3188 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3189 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3190
3191 oop mirror = reflect->obj_field(_oop_offset);
3192 Klass* k = java_lang_Class::as_Klass(mirror);
3193 assert(k->is_instance_klass(), "Must be");
3194
3195 // Get the constant pool back from the klass. Since class redefinition
3196 // merges the new constant pool into the old, this is essentially the
3197 // same constant pool as the original. If constant pool merging is
3198 // no longer done in the future, this will have to change to save
3199 // the original.
3200 return InstanceKlass::cast(k)->constants();
3201 }
3202
3203 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3204 macro(_base_offset, k, "base", object_signature, false)
3205
3206 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3207 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3208 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3209 }
3210
3211 #if INCLUDE_CDS
3212 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3213 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3214 }
3215 #endif
3216
3217 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3218 Klass* k = SystemDictionary::box_klass(type);
3219 if (k == NULL) return NULL;
3220 InstanceKlass* ik = InstanceKlass::cast(k);
3221 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3222 return ik->allocate_instance(THREAD);
3223 }
3224
3225
3226 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3227 oop box = initialize_and_allocate(type, CHECK_0);
3228 if (box == NULL) return NULL;
3229 switch (type) {
3230 case T_BOOLEAN:
3231 box->bool_field_put(value_offset, value->z);
3232 break;
3233 case T_CHAR:
3234 box->char_field_put(value_offset, value->c);
3235 break;
3236 case T_FLOAT:
3237 box->float_field_put(value_offset, value->f);
3238 break;
3239 case T_DOUBLE:
3240 box->double_field_put(long_value_offset, value->d);
3241 break;
3242 case T_BYTE:
3243 box->byte_field_put(value_offset, value->b);
3244 break;
3245 case T_SHORT:
3246 box->short_field_put(value_offset, value->s);
3247 break;
3248 case T_INT:
3249 box->int_field_put(value_offset, value->i);
3250 break;
3251 case T_LONG:
3252 box->long_field_put(long_value_offset, value->j);
3253 break;
3254 default:
3255 return NULL;
3256 }
3257 return box;
3258 }
3259
3260
3261 BasicType java_lang_boxing_object::basic_type(oop box) {
3262 if (box == NULL) return T_ILLEGAL;
3263 BasicType type = SystemDictionary::box_klass_type(box->klass());
3264 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3265 return T_ILLEGAL;
3266 return type;
3267 }
3268
3269
3270 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3271 BasicType type = SystemDictionary::box_klass_type(box->klass());
3272 switch (type) {
3273 case T_BOOLEAN:
3274 value->z = box->bool_field(value_offset);
3275 break;
3276 case T_CHAR:
3277 value->c = box->char_field(value_offset);
3278 break;
3279 case T_FLOAT:
3280 value->f = box->float_field(value_offset);
3281 break;
3282 case T_DOUBLE:
3283 value->d = box->double_field(long_value_offset);
3284 break;
3285 case T_BYTE:
3286 value->b = box->byte_field(value_offset);
3287 break;
3288 case T_SHORT:
3289 value->s = box->short_field(value_offset);
3290 break;
3291 case T_INT:
3292 value->i = box->int_field(value_offset);
3293 break;
3294 case T_LONG:
3295 value->j = box->long_field(long_value_offset);
3296 break;
3297 default:
3298 return T_ILLEGAL;
3299 } // end switch
3300 return type;
3301 }
3302
3303
3304 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3305 BasicType type = SystemDictionary::box_klass_type(box->klass());
3306 switch (type) {
3307 case T_BOOLEAN:
3308 box->bool_field_put(value_offset, value->z);
3309 break;
3310 case T_CHAR:
3311 box->char_field_put(value_offset, value->c);
3312 break;
3313 case T_FLOAT:
3314 box->float_field_put(value_offset, value->f);
3315 break;
3316 case T_DOUBLE:
3317 box->double_field_put(long_value_offset, value->d);
3318 break;
3319 case T_BYTE:
3320 box->byte_field_put(value_offset, value->b);
3321 break;
3322 case T_SHORT:
3323 box->short_field_put(value_offset, value->s);
3324 break;
3325 case T_INT:
3326 box->int_field_put(value_offset, value->i);
3327 break;
3328 case T_LONG:
3329 box->long_field_put(long_value_offset, value->j);
3330 break;
3331 default:
3332 return T_ILLEGAL;
3333 } // end switch
3334 return type;
3335 }
3336
3337
3338 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3339 switch (type) {
3340 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3341 case T_CHAR: st->print("%d", value->c); break;
3342 case T_BYTE: st->print("%d", value->b); break;
3343 case T_SHORT: st->print("%d", value->s); break;
3344 case T_INT: st->print("%d", value->i); break;
3345 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3346 case T_FLOAT: st->print("%f", value->f); break;
3347 case T_DOUBLE: st->print("%lf", value->d); break;
3348 default: st->print("type %d?", type); break;
3349 }
3350 }
3351
3352 // Support for java_lang_ref_Reference
3353
3354 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3355 assert(obj != NULL, "sanity");
3356 if (offset != java_lang_ref_Reference::referent_offset) {
3357 return false;
3358 }
3359
3360 Klass* k = obj->klass();
3361 if (!k->is_instance_klass()) {
3362 return false;
3363 }
3364
3365 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3366 bool is_reference = ik->reference_type() != REF_NONE;
3367 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3368 return is_reference;
3369 }
3370
3371 // Support for java_lang_ref_SoftReference
3372 //
3373
3374 #define SOFTREFERENCE_FIELDS_DO(macro) \
3375 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3376 macro(static_clock_offset, k, "clock", long_signature, true)
3377
3378 void java_lang_ref_SoftReference::compute_offsets() {
3379 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3380 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3381 }
3382
3383 #if INCLUDE_CDS
3384 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3385 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3386 }
3387 #endif
3388
3389 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3390 return ref->long_field(timestamp_offset);
3391 }
3392
3393 jlong java_lang_ref_SoftReference::clock() {
3394 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3395 oop base = ik->static_field_base_raw();
3396 return base->long_field(static_clock_offset);
3397 }
3398
3399 void java_lang_ref_SoftReference::set_clock(jlong value) {
3400 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3401 oop base = ik->static_field_base_raw();
3402 base->long_field_put(static_clock_offset, value);
3403 }
3404
3405 // Support for java_lang_invoke_DirectMethodHandle
3406
3407 int java_lang_invoke_DirectMethodHandle::_member_offset;
3408
3409 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3410 oop member_name = NULL;
3411 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3412 "a DirectMethodHandle oop is expected");
3413 return dmh->obj_field(member_offset_in_bytes());
3414 }
3415
3416 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3417 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3418
3419 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3420 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3421 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3422 }
3423
3424 #if INCLUDE_CDS
3425 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3426 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3427 }
3428 #endif
3429
3430 // Support for java_lang_invoke_MethodHandle
3431
3432 int java_lang_invoke_MethodHandle::_type_offset;
3433 int java_lang_invoke_MethodHandle::_form_offset;
3434
3435 int java_lang_invoke_MemberName::_clazz_offset;
3436 int java_lang_invoke_MemberName::_name_offset;
3437 int java_lang_invoke_MemberName::_type_offset;
3438 int java_lang_invoke_MemberName::_flags_offset;
3439 int java_lang_invoke_MemberName::_method_offset;
3440 int java_lang_invoke_MemberName::_vmindex_offset;
3441
3442 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3443 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3444
3445 int java_lang_invoke_LambdaForm::_vmentry_offset;
3446
3447 #define METHODHANDLE_FIELDS_DO(macro) \
3448 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3449 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3450
3451 void java_lang_invoke_MethodHandle::compute_offsets() {
3452 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3453 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3454 }
3455
3456 #if INCLUDE_CDS
3457 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3458 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3459 }
3460 #endif
3461
3462 #define MEMBERNAME_FIELDS_DO(macro) \
3463 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3464 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3465 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3466 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3467 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3468
3469 void java_lang_invoke_MemberName::compute_offsets() {
3470 InstanceKlass* k = SystemDictionary::MemberName_klass();
3471 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3472 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3473 }
3474
3475 #if INCLUDE_CDS
3476 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3477 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3478 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3479 }
3480 #endif
3481
3482 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3483 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3484 assert(k != NULL, "jdk mismatch");
3485 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3486 }
3487
3488 #if INCLUDE_CDS
3489 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3490 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3491 }
3492 #endif
3493
3494 #define LAMBDAFORM_FIELDS_DO(macro) \
3495 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3496
3497 void java_lang_invoke_LambdaForm::compute_offsets() {
3498 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3499 assert (k != NULL, "jdk mismatch");
3500 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3501 }
3502
3503 #if INCLUDE_CDS
3504 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3505 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3506 }
3507 #endif
3508
3509 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3510 return obj != NULL && is_subclass(obj->klass());
3511 }
3512
3513
3514 oop java_lang_invoke_MethodHandle::type(oop mh) {
3515 return mh->obj_field(_type_offset);
3516 }
3517
3518 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3519 mh->obj_field_put(_type_offset, mtype);
3520 }
3521
3522 oop java_lang_invoke_MethodHandle::form(oop mh) {
3523 assert(_form_offset != 0, "");
3524 return mh->obj_field(_form_offset);
3525 }
3526
3527 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3528 assert(_form_offset != 0, "");
3529 mh->obj_field_put(_form_offset, lform);
3530 }
3531
3532 /// MemberName accessors
3533
3534 oop java_lang_invoke_MemberName::clazz(oop mname) {
3535 assert(is_instance(mname), "wrong type");
3536 return mname->obj_field(_clazz_offset);
3537 }
3538
3539 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3540 assert(is_instance(mname), "wrong type");
3541 mname->obj_field_put(_clazz_offset, clazz);
3542 }
3543
3544 oop java_lang_invoke_MemberName::name(oop mname) {
3545 assert(is_instance(mname), "wrong type");
3546 return mname->obj_field(_name_offset);
3547 }
3548
3549 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3550 assert(is_instance(mname), "wrong type");
3551 mname->obj_field_put(_name_offset, name);
3552 }
3553
3554 oop java_lang_invoke_MemberName::type(oop mname) {
3555 assert(is_instance(mname), "wrong type");
3556 return mname->obj_field(_type_offset);
3557 }
3558
3559 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3560 assert(is_instance(mname), "wrong type");
3561 mname->obj_field_put(_type_offset, type);
3562 }
3563
3564 int java_lang_invoke_MemberName::flags(oop mname) {
3565 assert(is_instance(mname), "wrong type");
3566 return mname->int_field(_flags_offset);
3567 }
3568
3569 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3570 assert(is_instance(mname), "wrong type");
3571 mname->int_field_put(_flags_offset, flags);
3572 }
3573
3574
3575 // Return vmtarget from ResolvedMethodName method field through indirection
3576 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3577 assert(is_instance(mname), "wrong type");
3578 oop method = mname->obj_field(_method_offset);
3579 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3580 }
3581
3582 bool java_lang_invoke_MemberName::is_method(oop mname) {
3583 assert(is_instance(mname), "must be MemberName");
3584 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3585 }
3586
3587 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3588 assert(is_instance(mname), "wrong type");
3589 mname->obj_field_put(_method_offset, resolved_method);
3590 }
3591
3592 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3593 assert(is_instance(mname), "wrong type");
3594 return (intptr_t) mname->address_field(_vmindex_offset);
3595 }
3596
3597 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3598 assert(is_instance(mname), "wrong type");
3599 mname->address_field_put(_vmindex_offset, (address) index);
3600 }
3601
3602
3603 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3604 assert(is_instance(resolved_method), "wrong type");
3605 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3606 assert(m->is_method(), "must be");
3607 return m;
3608 }
3609
3610 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3611 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3612 assert(is_instance(resolved_method), "wrong type");
3613 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3614 }
3615
3616 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3617 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3618 oop resolved_method = ResolvedMethodTable::find_method(m());
3619 if (resolved_method == NULL) {
3620 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3621 if (!k->is_initialized()) {
3622 k->initialize(CHECK_NULL);
3623 }
3624 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3625 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3626 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3627 // distinct loaders) to ensure the metadata is kept alive.
3628 // This mirror may be different than the one in clazz field.
3629 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3630 resolved_method = ResolvedMethodTable::add_method(m, Handle(THREAD, new_resolved_method));
3631 }
3632 return resolved_method;
3633 }
3634
3635 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3636 assert(is_instance(lform), "wrong type");
3637 return lform->obj_field(_vmentry_offset);
3638 }
3639
3640
3641 // Support for java_lang_invoke_MethodType
3642
3643 int java_lang_invoke_MethodType::_rtype_offset;
3644 int java_lang_invoke_MethodType::_ptypes_offset;
3645
3646 #define METHODTYPE_FIELDS_DO(macro) \
3647 macro(_rtype_offset, k, "rtype", class_signature, false); \
3648 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3649
3650 void java_lang_invoke_MethodType::compute_offsets() {
3651 InstanceKlass* k = SystemDictionary::MethodType_klass();
3652 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3653 }
3654
3655 #if INCLUDE_CDS
3656 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3657 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3658 }
3659 #endif
3660
3661 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3662 st->print("(");
3663 objArrayOop pts = ptypes(mt);
3664 for (int i = 0, limit = pts->length(); i < limit; i++) {
3665 java_lang_Class::print_signature(pts->obj_at(i), st);
3666 }
3667 st->print(")");
3668 java_lang_Class::print_signature(rtype(mt), st);
3669 }
3670
3671 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3672 ResourceMark rm;
3673 stringStream buffer(128);
3674 print_signature(mt, &buffer);
3675 const char* sigstr = buffer.base();
3676 int siglen = (int) buffer.size();
3677 Symbol *name;
3678 if (!intern_if_not_found) {
3679 name = SymbolTable::probe(sigstr, siglen);
3680 } else {
3681 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3682 }
3683 return name;
3684 }
3685
3686 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3687 if (oopDesc::equals(mt1, mt2))
3688 return true;
3689 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3690 return false;
3691 if (ptype_count(mt1) != ptype_count(mt2))
3692 return false;
3693 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3694 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3695 return false;
3696 }
3697 return true;
3698 }
3699
3700 oop java_lang_invoke_MethodType::rtype(oop mt) {
3701 assert(is_instance(mt), "must be a MethodType");
3702 return mt->obj_field(_rtype_offset);
3703 }
3704
3705 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3706 assert(is_instance(mt), "must be a MethodType");
3707 return (objArrayOop) mt->obj_field(_ptypes_offset);
3708 }
3709
3710 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3711 return ptypes(mt)->obj_at(idx);
3712 }
3713
3714 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3715 return ptypes(mt)->length();
3716 }
3717
3718 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3719 objArrayOop pts = ptypes(mt);
3720 int count = pts->length();
3721 int slots = 0;
3722 for (int i = 0; i < count; i++) {
3723 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3724 slots += type2size[bt];
3725 }
3726 return slots;
3727 }
3728
3729 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3730 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3731 return type2size[bt];
3732 }
3733
3734
3735 // Support for java_lang_invoke_CallSite
3736
3737 int java_lang_invoke_CallSite::_target_offset;
3738 int java_lang_invoke_CallSite::_context_offset;
3739
3740 #define CALLSITE_FIELDS_DO(macro) \
3741 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3742 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3743
3744 void java_lang_invoke_CallSite::compute_offsets() {
3745 InstanceKlass* k = SystemDictionary::CallSite_klass();
3746 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3747 }
3748
3749 #if INCLUDE_CDS
3750 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3751 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3752 }
3753 #endif
3754
3755 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3756 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3757
3758 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3759 return dep_oop;
3760 }
3761
3762 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3763
3764 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3765 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3766
3767 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3768 InstanceKlass* k = SystemDictionary::Context_klass();
3769 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3770 }
3771
3772 #if INCLUDE_CDS
3773 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3774 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3775 }
3776 #endif
3777
3778 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3779 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3780 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3781 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3782 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3783 return dep_ctx;
3784 }
3785
3786 // Support for java_security_AccessControlContext
3787
3788 int java_security_AccessControlContext::_context_offset = 0;
3789 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3790 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3791 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3792
3793 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3794 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3795 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3796 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3797 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3798
3799 void java_security_AccessControlContext::compute_offsets() {
3800 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3801 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3802 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3803 }
3804
3805 #if INCLUDE_CDS
3806 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3807 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3808 }
3809 #endif
3810
3811 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3812 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3813 // Ensure klass is initialized
3814 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3815 // Allocate result
3816 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3817 // Fill in values
3818 result->obj_field_put(_context_offset, context());
3819 result->obj_field_put(_privilegedContext_offset, privileged_context());
3820 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3821 // whitelist AccessControlContexts created by the JVM if present
3822 if (_isAuthorized_offset != -1) {
3823 result->bool_field_put(_isAuthorized_offset, true);
3824 }
3825 return result;
3826 }
3827
3828
3829 // Support for java_lang_ClassLoader
3830
3831 bool java_lang_ClassLoader::offsets_computed = false;
3832 int java_lang_ClassLoader::_loader_data_offset = -1;
3833 int java_lang_ClassLoader::parallelCapable_offset = -1;
3834 int java_lang_ClassLoader::name_offset = -1;
3835 int java_lang_ClassLoader::nameAndId_offset = -1;
3836 int java_lang_ClassLoader::unnamedModule_offset = -1;
3837
3838 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3839 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3840 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3841 }
3842
3843 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3844 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3845 return RawAccess<>::load_at(loader, _loader_data_offset);
3846 }
3847
3848 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3849 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3850 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3851 }
3852
3853 #define CLASSLOADER_FIELDS_DO(macro) \
3854 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3855 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3856 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3857 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3858 macro(parent_offset, k1, "parent", classloader_signature, false)
3859
3860 void java_lang_ClassLoader::compute_offsets() {
3861 assert(!offsets_computed, "offsets should be initialized only once");
3862 offsets_computed = true;
3863
3864 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3865 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3866
3867 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3868 }
3869
3870 #if INCLUDE_CDS
3871 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3872 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3873 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3874 }
3875 #endif
3876
3877 oop java_lang_ClassLoader::parent(oop loader) {
3878 assert(is_instance(loader), "loader must be oop");
3879 return loader->obj_field(parent_offset);
3880 }
3881
3882 // Returns the name field of this class loader. If the name field has not
3883 // been set, null will be returned.
3884 oop java_lang_ClassLoader::name(oop loader) {
3885 assert(is_instance(loader), "loader must be oop");
3886 return loader->obj_field(name_offset);
3887 }
3888
3889 // Returns the nameAndId field of this class loader. The format is
3890 // as follows:
3891 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
3892 // If the defining loader has no name then <qualified-class-name> @<id>
3893 // If built-in loader, then omit '@<id>' as there is only one instance.
3894 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
3895 oop java_lang_ClassLoader::nameAndId(oop loader) {
3896 assert(is_instance(loader), "loader must be oop");
3897 return loader->obj_field(nameAndId_offset);
3898 }
3899
3900 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3901 assert(is_instance(loader), "loader must be oop");
3902 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3903 oop acl = loader;
3904 debug_only(jint loop_count = 0);
3905 // This loop taken verbatim from ClassLoader.java:
3906 do {
3907 acl = parent(acl);
3908 if (oopDesc::equals(cl, acl)) {
3909 return true;
3910 }
3911 assert(++loop_count > 0, "loop_count overflow");
3912 } while (acl != NULL);
3913 return false;
3914 }
3915
3916 bool java_lang_ClassLoader::is_instance(oop obj) {
3917 return obj != NULL && is_subclass(obj->klass());
3918 }
3919
3920
3921 // For class loader classes, parallelCapable defined
3922 // based on non-null field
3923 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3924 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3925 if (parallelCapable_offset == -1) {
3926 // Default for backward compatibility is false
3927 return false;
3928 }
3929 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3930 }
3931
3932 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3933 // Fix for 4474172; see evaluation for more details
3934 loader = non_reflection_class_loader(loader);
3935
3936 oop cl = SystemDictionary::java_system_loader();
3937 while(cl != NULL) {
3938 if (oopDesc::equals(cl, loader)) return true;
3939 cl = parent(cl);
3940 }
3941 return false;
3942 }
3943
3944 // Return true if this is one of the class loaders associated with
3945 // the generated bytecodes for reflection.
3946 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3947 if (loader != NULL) {
3948 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3949 // This might be null in non-1.4 JDKs
3950 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3951 }
3952 return false;
3953 }
3954
3955 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3956 // See whether this is one of the class loaders associated with
3957 // the generated bytecodes for reflection, and if so, "magically"
3958 // delegate to its parent to prevent class loading from occurring
3959 // in places where applications using reflection didn't expect it.
3960 if (is_reflection_class_loader(loader)) {
3961 return parent(loader);
3962 }
3963 return loader;
3964 }
3965
3966 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3967 assert(is_instance(loader), "loader must be oop");
3968 return loader->obj_field(unnamedModule_offset);
3969 }
3970
3971 // Support for java_lang_System
3972 //
3973 #define SYSTEM_FIELDS_DO(macro) \
3974 macro(static_in_offset, k, "in", input_stream_signature, true); \
3975 macro(static_out_offset, k, "out", print_stream_signature, true); \
3976 macro(static_err_offset, k, "err", print_stream_signature, true); \
3977 macro(static_security_offset, k, "security", security_manager_signature, true)
3978
3979 void java_lang_System::compute_offsets() {
3980 InstanceKlass* k = SystemDictionary::System_klass();
3981 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3982 }
3983
3984 #if INCLUDE_CDS
3985 void java_lang_System::serialize_offsets(SerializeClosure* f) {
3986 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3987 }
3988 #endif
3989
3990 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
3991 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
3992 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
3993
3994 // Support for jdk_internal_misc_UnsafeConstants
3995 //
3996 class UnsafeConstantsFixup : public FieldClosure {
3997 private:
3998 int _address_size;
3999 int _page_size;
4000 bool _big_endian;
4001 bool _use_unaligned_access;
4002 public:
4003 UnsafeConstantsFixup() {
4004 // round up values for all static final fields
4005 _address_size = sizeof(void*);
4006 _page_size = os::vm_page_size();
4007 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4008 _use_unaligned_access = UseUnalignedAccesses;
4009 }
4010
4011 void do_field(fieldDescriptor* fd) {
4012 oop mirror = fd->field_holder()->java_mirror();
4013 assert(mirror != NULL, "UnsafeConstants must have mirror already");
4014 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4015 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4016 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4017 if (fd->name() == vmSymbols::address_size_name()) {
4018 mirror->int_field_put(fd->offset(), _address_size);
4019 } else if (fd->name() == vmSymbols::page_size_name()) {
4020 mirror->int_field_put(fd->offset(), _page_size);
4021 } else if (fd->name() == vmSymbols::big_endian_name()) {
4022 mirror->bool_field_put(fd->offset(), _big_endian);
4023 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4024 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4025 } else {
4026 assert(false, "unexpected UnsafeConstants field");
4027 }
4028 }
4029 };
4030
4031 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4032 UnsafeConstantsFixup fixup;
4033 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4034 }
4035
4036 int java_lang_Class::_klass_offset;
4037 int java_lang_Class::_array_klass_offset;
4038 int java_lang_Class::_oop_size_offset;
4039 int java_lang_Class::_static_oop_field_count_offset;
4040 int java_lang_Class::_class_loader_offset;
4041 int java_lang_Class::_module_offset;
4042 int java_lang_Class::_protection_domain_offset;
4043 int java_lang_Class::_component_mirror_offset;
4044 int java_lang_Class::_init_lock_offset;
4045 int java_lang_Class::_signers_offset;
4046 int java_lang_Class::_name_offset;
4047 int java_lang_Class::_source_file_offset;
4048 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4049 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4050 int java_lang_Throwable::backtrace_offset;
4051 int java_lang_Throwable::detailMessage_offset;
4052 int java_lang_Throwable::stackTrace_offset;
4053 int java_lang_Throwable::depth_offset;
4054 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4055 int java_lang_reflect_AccessibleObject::override_offset;
4056 int java_lang_reflect_Method::clazz_offset;
4057 int java_lang_reflect_Method::name_offset;
4058 int java_lang_reflect_Method::returnType_offset;
4059 int java_lang_reflect_Method::parameterTypes_offset;
4060 int java_lang_reflect_Method::exceptionTypes_offset;
4061 int java_lang_reflect_Method::slot_offset;
4062 int java_lang_reflect_Method::modifiers_offset;
4063 int java_lang_reflect_Method::signature_offset;
4064 int java_lang_reflect_Method::annotations_offset;
4065 int java_lang_reflect_Method::parameter_annotations_offset;
4066 int java_lang_reflect_Method::annotation_default_offset;
4067 int java_lang_reflect_Constructor::clazz_offset;
4068 int java_lang_reflect_Constructor::parameterTypes_offset;
4069 int java_lang_reflect_Constructor::exceptionTypes_offset;
4070 int java_lang_reflect_Constructor::slot_offset;
4071 int java_lang_reflect_Constructor::modifiers_offset;
4072 int java_lang_reflect_Constructor::signature_offset;
4073 int java_lang_reflect_Constructor::annotations_offset;
4074 int java_lang_reflect_Constructor::parameter_annotations_offset;
4075 int java_lang_reflect_Field::clazz_offset;
4076 int java_lang_reflect_Field::name_offset;
4077 int java_lang_reflect_Field::type_offset;
4078 int java_lang_reflect_Field::slot_offset;
4079 int java_lang_reflect_Field::modifiers_offset;
4080 int java_lang_reflect_Field::signature_offset;
4081 int java_lang_reflect_Field::annotations_offset;
4082 int java_lang_reflect_Parameter::name_offset;
4083 int java_lang_reflect_Parameter::modifiers_offset;
4084 int java_lang_reflect_Parameter::index_offset;
4085 int java_lang_reflect_Parameter::executable_offset;
4086 int java_lang_boxing_object::value_offset;
4087 int java_lang_boxing_object::long_value_offset;
4088 int java_lang_ref_Reference::referent_offset;
4089 int java_lang_ref_Reference::queue_offset;
4090 int java_lang_ref_Reference::next_offset;
4091 int java_lang_ref_Reference::discovered_offset;
4092 int java_lang_ref_SoftReference::timestamp_offset;
4093 int java_lang_ref_SoftReference::static_clock_offset;
4094 int java_lang_ClassLoader::parent_offset;
4095 int java_lang_System::static_in_offset;
4096 int java_lang_System::static_out_offset;
4097 int java_lang_System::static_err_offset;
4098 int java_lang_System::static_security_offset;
4099 int java_lang_StackTraceElement::methodName_offset;
4100 int java_lang_StackTraceElement::fileName_offset;
4101 int java_lang_StackTraceElement::lineNumber_offset;
4102 int java_lang_StackTraceElement::moduleName_offset;
4103 int java_lang_StackTraceElement::moduleVersion_offset;
4104 int java_lang_StackTraceElement::classLoaderName_offset;
4105 int java_lang_StackTraceElement::declaringClass_offset;
4106 int java_lang_StackTraceElement::declaringClassObject_offset;
4107 int java_lang_StackFrameInfo::_memberName_offset;
4108 int java_lang_StackFrameInfo::_bci_offset;
4109 int java_lang_StackFrameInfo::_version_offset;
4110 int java_lang_LiveStackFrameInfo::_monitors_offset;
4111 int java_lang_LiveStackFrameInfo::_locals_offset;
4112 int java_lang_LiveStackFrameInfo::_operands_offset;
4113 int java_lang_LiveStackFrameInfo::_mode_offset;
4114 int java_lang_AssertionStatusDirectives::classes_offset;
4115 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4116 int java_lang_AssertionStatusDirectives::packages_offset;
4117 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4118 int java_lang_AssertionStatusDirectives::deflt_offset;
4119 int java_nio_Buffer::_limit_offset;
4120 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4121 int reflect_ConstantPool::_oop_offset;
4122 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4123
4124
4125 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4126 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4127 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4128 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4129 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4130 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4131 macro(methodName_offset, k, "methodName", string_signature, false); \
4132 macro(fileName_offset, k, "fileName", string_signature, false); \
4133 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4134
4135 // Support for java_lang_StackTraceElement
4136 void java_lang_StackTraceElement::compute_offsets() {
4137 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4138 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4139 }
4140
4141 #if INCLUDE_CDS
4142 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4143 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4144 }
4145 #endif
4146
4147 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4148 element->obj_field_put(fileName_offset, value);
4149 }
4150
4151 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4152 element->obj_field_put(declaringClass_offset, value);
4153 }
4154
4155 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4156 element->obj_field_put(methodName_offset, value);
4157 }
4158
4159 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4160 element->int_field_put(lineNumber_offset, value);
4161 }
4162
4163 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4164 element->obj_field_put(moduleName_offset, value);
4165 }
4166
4167 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4168 element->obj_field_put(moduleVersion_offset, value);
4169 }
4170
4171 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4172 element->obj_field_put(classLoaderName_offset, value);
4173 }
4174
4175 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4176 element->obj_field_put(declaringClassObject_offset, value);
4177 }
4178
4179 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4180 element->short_field_put(_version_offset, value);
4181 }
4182
4183 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4184 element->int_field_put(_bci_offset, value);
4185 }
4186
4187 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4188 element->obj_field_put(_monitors_offset, value);
4189 }
4190
4191 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4192 element->obj_field_put(_locals_offset, value);
4193 }
4194
4195 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4196 element->obj_field_put(_operands_offset, value);
4197 }
4198
4199 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4200 element->int_field_put(_mode_offset, value);
4201 }
4202
4203 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4204 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4205 macro(classes_offset, k, "classes", string_array_signature, false); \
4206 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4207 macro(packages_offset, k, "packages", string_array_signature, false); \
4208 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4209 macro(deflt_offset, k, "deflt", bool_signature, false)
4210
4211 void java_lang_AssertionStatusDirectives::compute_offsets() {
4212 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4213 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4214 }
4215
4216 #if INCLUDE_CDS
4217 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4218 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4219 }
4220 #endif
4221
4222 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4223 o->obj_field_put(classes_offset, val);
4224 }
4225
4226 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4227 o->obj_field_put(classEnabled_offset, val);
4228 }
4229
4230 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4231 o->obj_field_put(packages_offset, val);
4232 }
4233
4234 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4235 o->obj_field_put(packageEnabled_offset, val);
4236 }
4237
4238 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4239 o->bool_field_put(deflt_offset, val);
4240 }
4241
4242
4243 // Support for intrinsification of java.nio.Buffer.checkIndex
4244 int java_nio_Buffer::limit_offset() {
4245 return _limit_offset;
4246 }
4247
4248 #define BUFFER_FIELDS_DO(macro) \
4249 macro(_limit_offset, k, "limit", int_signature, false)
4250
4251 void java_nio_Buffer::compute_offsets() {
4252 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4253 assert(k != NULL, "must be loaded in 1.4+");
4254 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4255 }
4256
4257 #if INCLUDE_CDS
4258 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4259 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4260 }
4261 #endif
4262
4263 #define AOS_FIELDS_DO(macro) \
4264 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4265
4266 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4267 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4268 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4269 }
4270
4271 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4272 assert(_owner_offset != 0, "Must be initialized");
4273 return obj->obj_field(_owner_offset);
4274 }
4275
4276 #if INCLUDE_CDS
4277 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4278 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4279 }
4280 #endif
4281
4282 static int member_offset(int hardcoded_offset) {
4283 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4284 }
4285
4286 // Compute hard-coded offsets
4287 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4288 // are not available to determine the offset_of_static_fields.
4289 void JavaClasses::compute_hard_coded_offsets() {
4290
4291 // java_lang_boxing_object
4292 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4293 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4294
4295 // java_lang_ref_Reference
4296 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4297 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4298 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4299 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4300 }
4301
4302 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4303
4304 // Compute non-hard-coded field offsets of all the classes in this file
4305 void JavaClasses::compute_offsets() {
4306 if (UseSharedSpaces) {
4307 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4308 JvmtiExport::has_early_class_hook_env()),
4309 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4310 // None of the classes used by the rest of this function can be replaced by
4311 // JMVTI ClassFileLoadHook.
4312 // We are safe to use the archived offsets, which have already been restored
4313 // by JavaClasses::serialize_offsets, without computing the offsets again.
4314 return;
4315 }
4316
4317 // We have already called the compute_offsets() of the
4318 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4319 // earlier inside SystemDictionary::resolve_well_known_classes()
4320 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4321
4322 // generated interpreter code wants to know about the offsets we just computed:
4323 AbstractAssembler::update_delayed_values();
4324 }
4325
4326 #if INCLUDE_CDS
4327 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4328
4329 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4330 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4331 }
4332 #endif
4333
4334
4335 #ifndef PRODUCT
4336
4337 // These functions exist to assert the validity of hard-coded field offsets to guard
4338 // against changes in the class files
4339
4340 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4341 EXCEPTION_MARK;
4342 fieldDescriptor fd;
4343 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4344 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4345 InstanceKlass* ik = InstanceKlass::cast(k);
4346 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4347 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4348 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4349 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4350 return false;
4351 }
4352 if (fd.is_static()) {
4353 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4354 return false;
4355 }
4356 if (fd.offset() == hardcoded_offset ) {
4357 return true;
4358 } else {
4359 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4360 klass_name, field_name, hardcoded_offset, fd.offset());
4361 return false;
4362 }
4363 }
4364
4365 // Check the hard-coded field offsets of all the classes in this file
4366
4367 void JavaClasses::check_offsets() {
4368 bool valid = true;
4369
4370 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4371 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4372
4373 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4374 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4375
4376 // Boxed primitive objects (java_lang_boxing_object)
4377
4378 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4379 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4380 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4381 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4382 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4383 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4384 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4385 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4386
4387 // java.lang.ref.Reference
4388
4389 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4390 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4391 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4392 // Fake field
4393 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4394
4395 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4396 }
4397
4398 #endif // PRODUCT
4399
4400 int InjectedField::compute_offset() {
4401 InstanceKlass* ik = InstanceKlass::cast(klass());
4402 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4403 if (!may_be_java && !fs.access_flags().is_internal()) {
4404 // Only look at injected fields
4405 continue;
4406 }
4407 if (fs.name() == name() && fs.signature() == signature()) {
4408 return fs.offset();
4409 }
4410 }
4411 ResourceMark rm;
4412 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)" : "");
4413 #ifndef PRODUCT
4414 ik->print();
4415 tty->print_cr("all fields:");
4416 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4417 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4418 }
4419 #endif //PRODUCT
4420 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4421 return -1;
4422 }
4423
4424 void javaClasses_init() {
4425 JavaClasses::compute_offsets();
4426 JavaClasses::check_offsets();
4427 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4428 }