1 /*
2 * Copyright (c) 1997, 2024, 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 "cds/archiveBuilder.hpp"
27 #include "cds/archiveHeapLoader.hpp"
28 #include "cds/cdsConfig.hpp"
29 #include "cds/heapShared.hpp"
30 #include "cds/metaspaceShared.hpp"
31 #include "classfile/altHashing.hpp"
32 #include "classfile/classLoaderData.inline.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/javaClassesImpl.hpp"
35 #include "classfile/javaThreadStatus.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "code/debugInfo.hpp"
43 #include "code/dependencyContext.hpp"
44 #include "code/pcDesc.hpp"
45 #include "gc/shared/collectedHeap.inline.hpp"
46 #include "interpreter/interpreter.hpp"
47 #include "interpreter/linkResolver.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "logging/logStream.hpp"
51 #include "memory/oopFactory.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/fieldInfo.hpp"
55 #include "oops/fieldStreams.inline.hpp"
56 #include "oops/flatArrayKlass.hpp"
57 #include "oops/inlineKlass.inline.hpp"
58 #include "oops/instanceKlass.inline.hpp"
59 #include "oops/instanceMirrorKlass.inline.hpp"
60 #include "oops/klass.hpp"
61 #include "oops/klass.inline.hpp"
62 #include "oops/method.inline.hpp"
63 #include "oops/objArrayKlass.hpp"
64 #include "oops/objArrayOop.inline.hpp"
65 #include "oops/oopCast.inline.hpp"
66 #include "oops/oop.inline.hpp"
67 #include "oops/symbol.hpp"
68 #include "oops/recordComponent.hpp"
69 #include "oops/typeArrayOop.inline.hpp"
70 #include "prims/jvmtiExport.hpp"
71 #include "prims/methodHandles.hpp"
72 #include "prims/resolvedMethodTable.hpp"
73 #include "runtime/continuationEntry.inline.hpp"
74 #include "runtime/continuationJavaClasses.inline.hpp"
75 #include "runtime/fieldDescriptor.inline.hpp"
76 #include "runtime/frame.inline.hpp"
77 #include "runtime/handles.inline.hpp"
78 #include "runtime/handshake.hpp"
79 #include "runtime/init.hpp"
80 #include "runtime/interfaceSupport.inline.hpp"
81 #include "runtime/java.hpp"
82 #include "runtime/javaCalls.hpp"
83 #include "runtime/javaThread.hpp"
84 #include "runtime/jniHandles.inline.hpp"
85 #include "runtime/reflectionUtils.hpp"
86 #include "runtime/safepoint.hpp"
87 #include "runtime/safepointVerifiers.hpp"
88 #include "runtime/threadSMR.hpp"
89 #include "runtime/vframe.inline.hpp"
90 #include "runtime/vm_version.hpp"
91 #include "utilities/align.hpp"
92 #include "utilities/globalDefinitions.hpp"
93 #include "utilities/growableArray.hpp"
94 #include "utilities/preserveException.hpp"
95 #include "utilities/utf8.hpp"
96 #if INCLUDE_JVMCI
97 #include "jvmci/jvmciJavaClasses.hpp"
98 #endif
99
100 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
101 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
102
103 InjectedField JavaClasses::_injected_fields[] = {
104 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
105 };
106
107 // Register native methods of Object
108 void java_lang_Object::register_natives(TRAPS) {
109 InstanceKlass* obj = vmClasses::Object_klass();
110 Method::register_native(obj, vmSymbols::hashCode_name(),
111 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
112 Method::register_native(obj, vmSymbols::wait_name(),
113 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
114 Method::register_native(obj, vmSymbols::notify_name(),
115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
116 Method::register_native(obj, vmSymbols::notifyAll_name(),
117 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
118 Method::register_native(obj, vmSymbols::clone_name(),
119 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
120 }
121
122 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
123 return _injected_fields[(int)id].compute_offset();
124 }
125
126 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
127 *field_count = 0;
128
129 vmSymbolID sid = vmSymbols::find_sid(class_name);
130 if (sid == vmSymbolID::NO_SID) {
131 // Only well known classes can inject fields
132 return nullptr;
133 }
134
135 int count = 0;
136 int start = -1;
137
138 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
139 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
140 count++; \
141 if (start == -1) { \
142 start = (int)InjectedFieldID::klass##_##name##_enum; \
143 } \
144 }
145 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
146 #undef LOOKUP_INJECTED_FIELD
147
148 if (start != -1) {
149 *field_count = count;
150 return _injected_fields + start;
151 }
152 return nullptr;
153 }
154
155
156 // Helpful routine for computing field offsets at run time rather than hardcoding them
157 // Finds local fields only, including static fields. Static field offsets are from the
158 // beginning of the mirror.
159 void JavaClasses::compute_offset(int &dest_offset,
160 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
161 bool is_static) {
162 fieldDescriptor fd;
163 if (ik == nullptr) {
164 ResourceMark rm;
165 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
166 vm_exit_during_initialization("Invalid layout of well-known class");
167 }
168
169 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
170 ResourceMark rm;
171 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
172 name_symbol->as_C_string(), signature_symbol->as_C_string());
173 #ifndef PRODUCT
174 // Prints all fields and offsets
175 Log(class) lt;
176 LogStream ls(lt.error());
177 ik->print_on(&ls);
178 #endif //PRODUCT
179 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
180 }
181 dest_offset = fd.offset();
182 }
183
184 // Overloading to pass name as a string.
185 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
186 const char* name_string, Symbol* signature_symbol,
187 bool is_static) {
188 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
189 if (name == nullptr) {
190 ResourceMark rm;
191 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
192 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
193 }
194 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
195 }
196
197 // java_lang_String
198
199 int java_lang_String::_value_offset;
200 int java_lang_String::_hash_offset;
201 int java_lang_String::_hashIsZero_offset;
202 int java_lang_String::_coder_offset;
203 int java_lang_String::_flags_offset;
204
205 bool java_lang_String::_initialized;
206
207
208 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
209 uint8_t* addr = flags_addr(java_string);
210 uint8_t value = Atomic::load(addr);
211 while ((value & flag_mask) == 0) {
212 uint8_t old_value = value;
213 value |= flag_mask;
214 value = Atomic::cmpxchg(addr, old_value, value);
215 if (value == old_value) return false; // Flag bit changed from 0 to 1.
216 }
217 return true; // Flag bit is already 1.
218 }
219
220 #define STRING_FIELDS_DO(macro) \
221 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
222 macro(_hash_offset, k, "hash", int_signature, false); \
223 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
224 macro(_coder_offset, k, "coder", byte_signature, false);
225
226 void java_lang_String::compute_offsets() {
227 if (_initialized) {
228 return;
229 }
230
231 InstanceKlass* k = vmClasses::String_klass();
232 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
233 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
234
235 _initialized = true;
236 }
237
238 #if INCLUDE_CDS
239 void java_lang_String::serialize_offsets(SerializeClosure* f) {
240 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
241 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
242 f->do_bool(&_initialized);
243 }
244 #endif
245
246 class CompactStringsFixup : public FieldClosure {
247 private:
248 bool _value;
249
250 public:
251 CompactStringsFixup(bool value) : _value(value) {}
252
253 void do_field(fieldDescriptor* fd) {
254 if (fd->name() == vmSymbols::compact_strings_name()) {
255 oop mirror = fd->field_holder()->java_mirror();
256 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
257 assert(mirror != nullptr, "String must have mirror already");
258 mirror->bool_field_put(fd->offset(), _value);
259 }
260 }
261 };
262
263 void java_lang_String::set_compact_strings(bool value) {
264 CompactStringsFixup fix(value);
265 vmClasses::String_klass()->do_local_static_fields(&fix);
266 }
267
268 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
269 assert(_initialized, "Must be initialized");
270 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
271
272 // Create the String object first, so there's a chance that the String
273 // and the char array it points to end up in the same cache line.
274 oop obj;
275 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
276
277 // Create the char array. The String object must be handlized here
278 // because GC can happen as a result of the allocation attempt.
279 Handle h_obj(THREAD, obj);
280 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
281 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
282
283 // Point the String at the char array
284 obj = h_obj();
285 set_value(obj, buffer);
286 // No need to zero the offset, allocation zero'ed the entire String object
287 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
288 return h_obj;
289 }
290
291 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
292 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
293 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
294 typeArrayOop buffer = value(h_obj());
295 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
296 if (is_latin1) {
297 for (int index = 0; index < length; index++) {
298 buffer->byte_at_put(index, (jbyte)unicode[index]);
299 }
300 } else {
301 for (int index = 0; index < length; index++) {
302 buffer->char_at_put(index, unicode[index]);
303 }
304 }
305
306 #ifdef ASSERT
307 {
308 ResourceMark rm;
309 char* expected = UNICODE::as_utf8(unicode, length);
310 char* actual = as_utf8_string(h_obj());
311 if (strcmp(expected, actual) != 0) {
312 fatal("Unicode conversion failure: %s --> %s", expected, actual);
313 }
314 }
315 #endif
316
317 return h_obj;
318 }
319
320 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
321 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
322 return h_obj();
323 }
324
325 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
326 if (utf8_str == nullptr) {
327 return Handle();
328 }
329 bool has_multibyte, is_latin1;
330 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
331 if (!CompactStrings) {
332 has_multibyte = true;
333 is_latin1 = false;
334 }
335
336 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
337 if (length > 0) {
338 if (!has_multibyte) {
339 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
340 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
341 } else if (is_latin1) {
342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
343 } else {
344 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
345 }
346 }
347
348 #ifdef ASSERT
349 // This check is too strict when the input string is not a valid UTF8.
350 // For example, it may be created with arbitrary content via jni_NewStringUTF.
351 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) {
352 ResourceMark rm;
353 const char* expected = utf8_str;
354 char* actual = as_utf8_string(h_obj());
355 if (strcmp(expected, actual) != 0) {
356 fatal("String conversion failure: %s --> %s", expected, actual);
357 }
358 }
359 #endif
360
361 return h_obj;
362 }
363
364 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
365 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
366 return h_obj();
367 }
368
369 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
370 const char* utf8_str = (char*)symbol->bytes();
371 int utf8_len = symbol->utf8_length();
372
373 bool has_multibyte, is_latin1;
374 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
375 if (!CompactStrings) {
376 has_multibyte = true;
377 is_latin1 = false;
378 }
379
380 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
381 if (length > 0) {
382 if (!has_multibyte) {
383 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
384 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
385 } else if (is_latin1) {
386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
387 } else {
388 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
389 }
390 }
391
392 #ifdef ASSERT
393 {
394 ResourceMark rm;
395 const char* expected = symbol->as_utf8();
396 char* actual = as_utf8_string(h_obj());
397 if (strncmp(expected, actual, utf8_len) != 0) {
398 fatal("Symbol conversion failure: %s --> %s", expected, actual);
399 }
400 }
401 #endif
402
403 return h_obj;
404 }
405
406 // Converts a C string to a Java String based on current encoding
407 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
408 assert(str != nullptr, "bad arguments");
409
410 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
411 static to_java_string_fn_t _to_java_string_fn = nullptr;
412
413 if (_to_java_string_fn == nullptr) {
414 void *lib_handle = os::native_java_library();
415 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
416 #if defined(_WIN32) && !defined(_WIN64)
417 if (_to_java_string_fn == nullptr) {
418 // On 32 bit Windows, also try __stdcall decorated name
419 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
420 }
421 #endif
422 if (_to_java_string_fn == nullptr) {
423 fatal("JNU_NewStringPlatform missing");
424 }
425 }
426
427 jstring js = nullptr;
428 {
429 JavaThread* thread = THREAD;
430 HandleMark hm(thread);
431 ThreadToNativeFromVM ttn(thread);
432 js = (_to_java_string_fn)(thread->jni_environment(), str);
433 }
434
435 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
436 JNIHandles::destroy_local(js); // destroy local JNIHandle.
437 return native_platform_string;
438 }
439
440 // Converts a Java String to a native C string that can be used for
441 // native OS calls.
442 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
443 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
444 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
445
446 if (_to_platform_string_fn == nullptr) {
447 void *lib_handle = os::native_java_library();
448 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
449 if (_to_platform_string_fn == nullptr) {
450 fatal("GetStringPlatformChars missing");
451 }
452 }
453
454 char *native_platform_string;
455 jstring js;
456 { JavaThread* thread = THREAD;
457 js = (jstring) JNIHandles::make_local(thread, java_string());
458 HandleMark hm(thread);
459 ThreadToNativeFromVM ttn(thread);
460 JNIEnv *env = thread->jni_environment();
461 bool is_copy;
462 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
463 assert(is_copy == JNI_TRUE, "is_copy value changed");
464 }
465
466 // Uses a store barrier and therefore needs to be in vm state
467 JNIHandles::destroy_local(js);
468
469 return native_platform_string;
470 }
471
472 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
473 ResourceMark rm(THREAD);
474 return create_from_str(java_name->as_klass_external_name(), THREAD);
475 }
476
477 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
478 jchar* result = as_unicode_string_or_null(java_string, length);
479 if (result == nullptr) {
480 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
481 }
482 return result;
483 }
484
485 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
486 typeArrayOop value = java_lang_String::value(java_string);
487 length = java_lang_String::length(java_string, value);
488 bool is_latin1 = java_lang_String::is_latin1(java_string);
489
490 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
491 if (result != nullptr) {
492 if (!is_latin1) {
493 for (int index = 0; index < length; index++) {
494 result[index] = value->char_at(index);
495 }
496 } else {
497 for (int index = 0; index < length; index++) {
498 result[index] = ((jchar) value->byte_at(index)) & 0xff;
499 }
500 }
501 }
502 return result;
503 }
504
505 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
506 // The hash and hashIsZero fields are subject to a benign data race,
507 // making it crucial to ensure that any observable result of the
508 // calculation in this method stays correct under any possible read of
509 // these fields. Necessary restrictions to allow this to be correct
510 // without explicit memory fences or similar concurrency primitives is
511 // that we can ever only write to one of these two fields for a given
512 // String instance, and that the computation is idempotent and derived
513 // from immutable state
514 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
515 if (java_lang_String::hash_is_set(java_string)) {
516 return java_string->int_field(_hash_offset);
517 }
518
519 typeArrayOop value = java_lang_String::value(java_string);
520 int length = java_lang_String::length(java_string, value);
521 bool is_latin1 = java_lang_String::is_latin1(java_string);
522
523 unsigned int hash = 0;
524 if (length > 0) {
525 if (is_latin1) {
526 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
527 } else {
528 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
529 }
530 }
531
532 if (update) {
533 if (hash != 0) {
534 java_string->int_field_put(_hash_offset, hash);
535 } else {
536 java_string->bool_field_put(_hashIsZero_offset, true);
537 }
538 }
539 return hash;
540 }
541
542 unsigned int java_lang_String::hash_code(oop java_string) {
543 return hash_code_impl(java_string, /*update=*/true);
544 }
545
546 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
547 return hash_code_impl(java_string, /*update=*/false);
548 }
549
550
551 char* java_lang_String::as_quoted_ascii(oop java_string) {
552 typeArrayOop value = java_lang_String::value(java_string);
553 int length = java_lang_String::length(java_string, value);
554 bool is_latin1 = java_lang_String::is_latin1(java_string);
555
556 if (length == 0) return nullptr;
557
558 char* result;
559 int result_length;
560 if (!is_latin1) {
561 jchar* base = value->char_at_addr(0);
562 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
563 result = NEW_RESOURCE_ARRAY(char, result_length);
564 UNICODE::as_quoted_ascii(base, length, result, result_length);
565 } else {
566 jbyte* base = value->byte_at_addr(0);
567 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
568 result = NEW_RESOURCE_ARRAY(char, result_length);
569 UNICODE::as_quoted_ascii(base, length, result, result_length);
570 }
571 assert(result_length >= length + 1, "must not be shorter");
572 assert(result_length == (int)strlen(result) + 1, "must match");
573 return result;
574 }
575
576 Symbol* java_lang_String::as_symbol(oop java_string) {
577 typeArrayOop value = java_lang_String::value(java_string);
578 int length = java_lang_String::length(java_string, value);
579 bool is_latin1 = java_lang_String::is_latin1(java_string);
580 if (!is_latin1) {
581 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
582 Symbol* sym = SymbolTable::new_symbol(base, length);
583 return sym;
584 } else {
585 ResourceMark rm;
586 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
587 const char* base = UNICODE::as_utf8(position, length);
588 Symbol* sym = SymbolTable::new_symbol(base, length);
589 return sym;
590 }
591 }
592
593 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
594 typeArrayOop value = java_lang_String::value(java_string);
595 int length = java_lang_String::length(java_string, value);
596 bool is_latin1 = java_lang_String::is_latin1(java_string);
597 if (!is_latin1) {
598 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
599 return SymbolTable::probe_unicode(base, length);
600 } else {
601 ResourceMark rm;
602 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
603 const char* base = UNICODE::as_utf8(position, length);
604 return SymbolTable::probe(base, length);
605 }
606 }
607
608 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
609 assert(value_equals(value, java_lang_String::value(java_string)),
610 "value must be same as java_lang_String::value(java_string)");
611 int length = java_lang_String::length(java_string, value);
612 if (length == 0) {
613 return 0;
614 }
615 if (!java_lang_String::is_latin1(java_string)) {
616 return UNICODE::utf8_length(value->char_at_addr(0), length);
617 } else {
618 return UNICODE::utf8_length(value->byte_at_addr(0), length);
619 }
620 }
621
622 int java_lang_String::utf8_length(oop java_string) {
623 typeArrayOop value = java_lang_String::value(java_string);
624 return utf8_length(java_string, value);
625 }
626
627 char* java_lang_String::as_utf8_string(oop java_string) {
628 int length;
629 return as_utf8_string(java_string, length);
630 }
631
632 char* java_lang_String::as_utf8_string(oop java_string, int& length) {
633 typeArrayOop value = java_lang_String::value(java_string);
634 length = java_lang_String::length(java_string, value);
635 bool is_latin1 = java_lang_String::is_latin1(java_string);
636 if (!is_latin1) {
637 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
638 return UNICODE::as_utf8(position, length);
639 } else {
640 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
641 return UNICODE::as_utf8(position, length);
642 }
643 }
644
645 // Uses a provided buffer if it's sufficiently large, otherwise allocates
646 // a resource array to fit
647 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) {
648 typeArrayOop value = java_lang_String::value(java_string);
649 int len = java_lang_String::length(java_string, value);
650 bool is_latin1 = java_lang_String::is_latin1(java_string);
651 if (!is_latin1) {
652 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
653 utf8_len = UNICODE::utf8_length(position, len);
654 if (utf8_len >= buflen) {
655 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
656 }
657 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
658 } else {
659 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
660 utf8_len = UNICODE::utf8_length(position, len);
661 if (utf8_len >= buflen) {
662 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
663 }
664 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
665 }
666 }
667
668 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
669 assert(value_equals(value, java_lang_String::value(java_string)),
670 "value must be same as java_lang_String::value(java_string)");
671 int length = java_lang_String::length(java_string, value);
672 bool is_latin1 = java_lang_String::is_latin1(java_string);
673 if (!is_latin1) {
674 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
675 return UNICODE::as_utf8(position, length, buf, buflen);
676 } else {
677 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
678 return UNICODE::as_utf8(position, length, buf, buflen);
679 }
680 }
681
682 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
683 typeArrayOop value = java_lang_String::value(java_string);
684 return as_utf8_string(java_string, value, buf, buflen);
685 }
686
687 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
688 typeArrayOop value = java_lang_String::value(java_string);
689 bool is_latin1 = java_lang_String::is_latin1(java_string);
690 assert(start + len <= java_lang_String::length(java_string), "just checking");
691 if (!is_latin1) {
692 jchar* position = value->char_at_addr(start);
693 return UNICODE::as_utf8(position, len);
694 } else {
695 jbyte* position = value->byte_at_addr(start);
696 return UNICODE::as_utf8(position, len);
697 }
698 }
699
700 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
701 assert(value_equals(value, java_lang_String::value(java_string)),
702 "value must be same as java_lang_String::value(java_string)");
703 assert(start + len <= java_lang_String::length(java_string), "just checking");
704 bool is_latin1 = java_lang_String::is_latin1(java_string);
705 if (!is_latin1) {
706 jchar* position = value->char_at_addr(start);
707 return UNICODE::as_utf8(position, len, buf, buflen);
708 } else {
709 jbyte* position = value->byte_at_addr(start);
710 return UNICODE::as_utf8(position, len, buf, buflen);
711 }
712 }
713
714 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
715 assert(java_string->klass() == vmClasses::String_klass(),
716 "must be java_string");
717 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
718 int length = java_lang_String::length(java_string, value);
719 if (length != len) {
720 return false;
721 }
722 bool is_latin1 = java_lang_String::is_latin1(java_string);
723 if (!is_latin1) {
724 for (int i = 0; i < len; i++) {
725 if (value->char_at(i) != chars[i]) {
726 return false;
727 }
728 }
729 } else {
730 for (int i = 0; i < len; i++) {
731 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
732 return false;
733 }
734 }
735 }
736 return true;
737 }
738
739 bool java_lang_String::equals(oop str1, oop str2) {
740 assert(str1->klass() == vmClasses::String_klass(),
741 "must be java String");
742 assert(str2->klass() == vmClasses::String_klass(),
743 "must be java String");
744 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
745 bool is_latin1 = java_lang_String::is_latin1(str1);
746 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
747 bool is_latin2 = java_lang_String::is_latin1(str2);
748
749 if (is_latin1 != is_latin2) {
750 // Strings with different coders are never equal.
751 return false;
752 }
753 return value_equals(value1, value2);
754 }
755
756 void java_lang_String::print(oop java_string, outputStream* st) {
757 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
758 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
759
760 if (value == nullptr) {
761 // This can happen if, e.g., printing a String
762 // object before its initializer has been called
763 st->print("nullptr");
764 return;
765 }
766
767 int length = java_lang_String::length(java_string, value);
768 bool is_latin1 = java_lang_String::is_latin1(java_string);
769
770 st->print("\"");
771 for (int index = 0; index < length; index++) {
772 jchar c = (!is_latin1) ? value->char_at(index) :
773 ((jchar) value->byte_at(index)) & 0xff;
774 if (c < ' ') {
775 st->print("\\x%02X", c); // print control characters e.g. \x0A
776 } else {
777 st->print("%c", c);
778 }
779 }
780 st->print("\"");
781 }
782
783 // java_lang_Class
784
785 int java_lang_Class::_klass_offset;
786 int java_lang_Class::_array_klass_offset;
787 int java_lang_Class::_oop_size_offset;
788 int java_lang_Class::_static_oop_field_count_offset;
789 int java_lang_Class::_class_loader_offset;
790 int java_lang_Class::_module_offset;
791 int java_lang_Class::_protection_domain_offset;
792 int java_lang_Class::_component_mirror_offset;
793
794 int java_lang_Class::_signers_offset;
795 int java_lang_Class::_name_offset;
796 int java_lang_Class::_source_file_offset;
797 int java_lang_Class::_classData_offset;
798 int java_lang_Class::_classRedefinedCount_offset;
799
800 bool java_lang_Class::_offsets_computed = false;
801 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
802 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
803
804 #ifdef ASSERT
805 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
806 assert(fd->has_initial_value(), "caller should have checked this");
807 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
808 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
809 }
810 #endif
811
812 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
813 DEBUG_ONLY(assert_valid_static_string_field(fd);)
814 oop string = fd->string_initial_value(CHECK);
815 mirror()->obj_field_put(fd->offset(), string);
816 }
817
818 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
819 assert(fd->has_initial_value(), "caller should have checked this");
820 BasicType t = fd->field_type();
821 switch (t) {
822 case T_BYTE:
823 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
824 break;
825 case T_BOOLEAN:
826 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
827 break;
828 case T_CHAR:
829 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
830 break;
831 case T_SHORT:
832 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
833 break;
834 case T_INT:
835 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
836 break;
837 case T_FLOAT:
838 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
839 break;
840 case T_DOUBLE:
841 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
842 break;
843 case T_LONG:
844 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
845 break;
846 default:
847 // Illegal ConstantValue attribute in class file should have been
848 // caught during classfile parsing.
849 ShouldNotReachHere();
850 }
851 }
852
853 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
854 assert(mirror.not_null() && fd->is_static(), "just checking");
855 if (fd->has_initial_value()) {
856 if (fd->field_type() != T_OBJECT) {
857 initialize_static_primitive_field(fd, mirror);
858 } else {
859 initialize_static_string_field(fd, mirror, CHECK);
860 }
861 }
862 }
863
864 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
865 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
866
867 // If the offset was read from the shared archive, it was fixed up already
868 if (!k->is_shared()) {
869 if (k->is_instance_klass()) {
870 // During bootstrap, java.lang.Class wasn't loaded so static field
871 // offsets were computed without the size added it. Go back and
872 // update all the static field offsets to included the size.
873
874 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
875 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
876 // static fields offsets are updated in this array before reencoding everything into
877 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
878
879 int java_fields;
880 int injected_fields;
881 InstanceKlass* ik = InstanceKlass::cast(k);
882 GrowableArray<FieldInfo>* fields =
883 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
884 &java_fields, &injected_fields);
885 for (int i = 0; i < fields->length(); i++) {
886 FieldInfo* fi = fields->adr_at(i);
887 if (fi->access_flags().is_static()) {
888 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
889 }
890 }
891 Array<u1>* old_stream = ik->fieldinfo_stream();
892 assert(fields->length() == (java_fields + injected_fields), "Must be");
893 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
894 ik->set_fieldinfo_stream(new_fis);
895 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
896 }
897 }
898
899 if (k->is_shared() && k->has_archived_mirror_index()) {
900 if (ArchiveHeapLoader::is_in_use()) {
901 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
902 assert(present, "Missing archived mirror for %s", k->external_name());
903 return;
904 } else {
905 k->clear_java_mirror_handle();
906 k->clear_archived_mirror_index();
907 }
908 }
909 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
910 }
911
912 void java_lang_Class::initialize_mirror_fields(Klass* k,
913 Handle mirror,
914 Handle protection_domain,
915 Handle classData,
916 TRAPS) {
917 // Set protection domain also
918 set_protection_domain(mirror(), protection_domain());
919
920 // Initialize static fields
921 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
922
923 // Set classData
924 set_class_data(mirror(), classData());
925 }
926
927 // Set the java.lang.Module module field in the java_lang_Class mirror
928 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
929 if (module.is_null()) {
930 // During startup, the module may be null only if java.base has not been defined yet.
931 // Put the class on the fixup_module_list to patch later when the java.lang.Module
932 // for java.base is known. But note that since we captured the null module another
933 // thread may have completed that initialization.
934
935 bool javabase_was_defined = false;
936 {
937 MutexLocker m1(current, Module_lock);
938 // Keep list of classes needing java.base module fixup
939 if (!ModuleEntryTable::javabase_defined()) {
940 assert(k->java_mirror() != nullptr, "Class's mirror is null");
941 k->class_loader_data()->inc_keep_alive();
942 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
943 fixup_module_field_list()->push(k);
944 } else {
945 javabase_was_defined = true;
946 }
947 }
948
949 // If java.base was already defined then patch this particular class with java.base.
950 if (javabase_was_defined) {
951 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
952 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
953 "Setting class module field, " JAVA_BASE_NAME " should be defined");
954 Handle javabase_handle(current, javabase_entry->module());
955 set_module(mirror(), javabase_handle());
956 }
957 } else {
958 assert(Universe::is_module_initialized() ||
959 (ModuleEntryTable::javabase_defined() &&
960 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
961 "Incorrect java.lang.Module specification while creating mirror");
962 set_module(mirror(), module());
963 }
964 }
965
966 // Statically allocate fixup lists because they always get created.
967 void java_lang_Class::allocate_fixup_lists() {
968 GrowableArray<Klass*>* mirror_list =
969 new (mtClass) GrowableArray<Klass*>(40, mtClass);
970 set_fixup_mirror_list(mirror_list);
971
972 GrowableArray<Klass*>* module_list =
973 new (mtModule) GrowableArray<Klass*>(500, mtModule);
974 set_fixup_module_field_list(module_list);
975 }
976
977 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
978 Handle& mirror, Handle& comp_mirror, TRAPS) {
979 // Allocate mirror (java.lang.Class instance)
980 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
981 mirror = Handle(THREAD, mirror_oop);
982
983 // Setup indirection from mirror->klass
984 set_klass(mirror(), k);
985
986 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
987 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
988
989 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
990
991 // It might also have a component mirror. This mirror must already exist.
992 if (k->is_array_klass()) {
993 if (k->is_flatArray_klass()) {
994 Klass* element_klass = (Klass*) FlatArrayKlass::cast(k)->element_klass();
995 assert(element_klass->is_inline_klass(), "Must be inline type component");
996 if (is_scratch) {
997 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
998 } else {
999 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1000 }
1001 } else if (k->is_typeArray_klass()) {
1002 BasicType type = TypeArrayKlass::cast(k)->element_type();
1003 if (is_scratch) {
1004 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1005 } else {
1006 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1007 }
1008 } else {
1009 assert(k->is_objArray_klass(), "Must be");
1010 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1011 assert(element_klass != nullptr, "Must have an element klass");
1012 oop comp_oop = element_klass->java_mirror();
1013 if (is_scratch) {
1014 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1015 } else {
1016 comp_mirror = Handle(THREAD, comp_oop);
1017 }
1018 }
1019 assert(comp_mirror() != nullptr, "must have a mirror");
1020
1021 // Two-way link between the array klass and its component mirror:
1022 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1023 set_component_mirror(mirror(), comp_mirror());
1024 // See below for ordering dependencies between field array_klass in component mirror
1025 // and java_mirror in this klass.
1026 } else {
1027 assert(k->is_instance_klass(), "Must be");
1028
1029 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1030 if (HAS_PENDING_EXCEPTION) {
1031 // If any of the fields throws an exception like OOM remove the klass field
1032 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1033 // This mirror looks like a primitive type, which logically it is because it
1034 // it represents no class.
1035 set_klass(mirror(), nullptr);
1036 return;
1037 }
1038 }
1039 }
1040
1041 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1042 Handle module, Handle protection_domain,
1043 Handle classData, TRAPS) {
1044 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1045 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1046
1047 // Use this moment of initialization to cache modifier_flags also,
1048 // to support Class.getModifiers(). Instance classes recalculate
1049 // the cached flags after the class file is parsed, but before the
1050 // class is put into the system dictionary.
1051 int computed_modifiers = k->compute_modifier_flags();
1052 k->set_modifier_flags(computed_modifiers);
1053 // Class_klass has to be loaded because it is used to allocate
1054 // the mirror.
1055 if (vmClasses::Class_klass_loaded()) {
1056 Handle mirror;
1057 Handle comp_mirror;
1058
1059 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1060
1061 // set the classLoader field in the java_lang_Class instance
1062 assert(class_loader() == k->class_loader(), "should be same");
1063 set_class_loader(mirror(), class_loader());
1064
1065 // Setup indirection from klass->mirror
1066 // after any exceptions can happen during allocations.
1067 k->set_java_mirror(mirror);
1068
1069 // Set the module field in the java_lang_Class instance. This must be done
1070 // after the mirror is set.
1071 set_mirror_module_field(THREAD, k, mirror, module);
1072
1073 if (comp_mirror() != nullptr) {
1074 // Set after k->java_mirror() is published, because compiled code running
1075 // concurrently doesn't expect a k to have a null java_mirror.
1076 release_set_array_klass(comp_mirror(), k);
1077 }
1078
1079 if (CDSConfig::is_dumping_heap()) {
1080 create_scratch_mirror(k, CHECK);
1081 }
1082 } else {
1083 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1084 fixup_mirror_list()->push(k);
1085 }
1086 }
1087
1088 #if INCLUDE_CDS_JAVA_HEAP
1089 // The "scratch mirror" stores the states of the mirror object that can be
1090 // decided at dump time (such as the initial values of the static fields, the
1091 // component mirror, etc). At runtime, more information is added to it by
1092 // java_lang_Class::restore_archived_mirror().
1093 //
1094 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1095 // produces the same result as /*runtime*/create_mirror().
1096 //
1097 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1098 // latter may contain dumptime-specific information that cannot be archived
1099 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1100 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1101 if ((k->class_loader() != nullptr &&
1102 k->class_loader() != SystemDictionary::java_platform_loader() &&
1103 k->class_loader() != SystemDictionary::java_system_loader())) {
1104 // We only archive the mirrors of classes loaded by the built-in loaders
1105 return;
1106 }
1107
1108 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1109 Handle mirror;
1110 Handle comp_mirror;
1111 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1112
1113 if (comp_mirror() != nullptr) {
1114 release_set_array_klass(comp_mirror(), k);
1115 }
1116
1117 HeapShared::set_scratch_java_mirror(k, mirror());
1118 }
1119
1120 // Returns true if the mirror is updated, false if no archived mirror
1121 // data is present. After the archived mirror object is restored, the
1122 // shared klass' _has_raw_archived_mirror flag is cleared.
1123 bool java_lang_Class::restore_archived_mirror(Klass *k,
1124 Handle class_loader, Handle module,
1125 Handle protection_domain, TRAPS) {
1126 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1127 // see more details in vmClasses::resolve_all().
1128 if (!vmClasses::Class_klass_loaded()) {
1129 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1130 fixup_mirror_list()->push(k);
1131 return true;
1132 }
1133
1134 oop m = k->archived_java_mirror();
1135 assert(m != nullptr, "must have stored non-null archived mirror");
1136
1137 // Sanity: clear it now to prevent re-initialization if any of the following fails
1138 k->clear_archived_mirror_index();
1139
1140 // mirror is archived, restore
1141 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1142 assert(as_Klass(m) == k, "must be");
1143 Handle mirror(THREAD, m);
1144
1145 if (!k->is_array_klass()) {
1146 // - local static final fields with initial values were initialized at dump time
1147
1148 if (protection_domain.not_null()) {
1149 set_protection_domain(mirror(), protection_domain());
1150 }
1151 }
1152
1153 assert(class_loader() == k->class_loader(), "should be same");
1154 if (class_loader.not_null()) {
1155 set_class_loader(mirror(), class_loader());
1156 }
1157
1158 k->set_java_mirror(mirror);
1159
1160 set_mirror_module_field(THREAD, k, mirror, module);
1161
1162 if (log_is_enabled(Trace, cds, heap, mirror)) {
1163 ResourceMark rm(THREAD);
1164 log_trace(cds, heap, mirror)(
1165 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1166 }
1167
1168 return true;
1169 }
1170 #endif // INCLUDE_CDS_JAVA_HEAP
1171
1172 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1173 assert(_module_offset != 0, "must have been computed already");
1174 set_module(k->java_mirror(), module());
1175 }
1176
1177 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1178 assert(_oop_size_offset != 0, "must be set");
1179 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1180 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1181 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1182 }
1183
1184 int java_lang_Class::static_oop_field_count(oop java_class) {
1185 assert(_static_oop_field_count_offset != 0, "must be set");
1186 return java_class->int_field(_static_oop_field_count_offset);
1187 }
1188
1189 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1190 assert(_static_oop_field_count_offset != 0, "must be set");
1191 java_class->int_field_put(_static_oop_field_count_offset, size);
1192 }
1193
1194 oop java_lang_Class::protection_domain(oop java_class) {
1195 assert(_protection_domain_offset != 0, "must be set");
1196 return java_class->obj_field(_protection_domain_offset);
1197 }
1198 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1199 assert(_protection_domain_offset != 0, "must be set");
1200 java_class->obj_field_put(_protection_domain_offset, pd);
1201 }
1202
1203 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1204 assert(_component_mirror_offset != 0, "must be set");
1205 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1206 }
1207 oop java_lang_Class::component_mirror(oop java_class) {
1208 assert(_component_mirror_offset != 0, "must be set");
1209 return java_class->obj_field(_component_mirror_offset);
1210 }
1211
1212 objArrayOop java_lang_Class::signers(oop java_class) {
1213 assert(_signers_offset != 0, "must be set");
1214 return (objArrayOop)java_class->obj_field(_signers_offset);
1215 }
1216 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1217 assert(_signers_offset != 0, "must be set");
1218 java_class->obj_field_put(_signers_offset, signers);
1219 }
1220
1221 oop java_lang_Class::class_data(oop java_class) {
1222 assert(_classData_offset != 0, "must be set");
1223 return java_class->obj_field(_classData_offset);
1224 }
1225 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1226 assert(_classData_offset != 0, "must be set");
1227 java_class->obj_field_put(_classData_offset, class_data);
1228 }
1229
1230 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1231 assert(_class_loader_offset != 0, "offsets should have been initialized");
1232 java_class->obj_field_put(_class_loader_offset, loader);
1233 }
1234
1235 oop java_lang_Class::class_loader(oop java_class) {
1236 assert(_class_loader_offset != 0, "must be set");
1237 return java_class->obj_field(_class_loader_offset);
1238 }
1239
1240 oop java_lang_Class::module(oop java_class) {
1241 assert(_module_offset != 0, "must be set");
1242 return java_class->obj_field(_module_offset);
1243 }
1244
1245 void java_lang_Class::set_module(oop java_class, oop module) {
1246 assert(_module_offset != 0, "must be set");
1247 java_class->obj_field_put(_module_offset, module);
1248 }
1249
1250 oop java_lang_Class::name(Handle java_class, TRAPS) {
1251 assert(_name_offset != 0, "must be set");
1252 oop o = java_class->obj_field(_name_offset);
1253 if (o == nullptr) {
1254 o = StringTable::intern(as_external_name(java_class()), THREAD);
1255 java_class->obj_field_put(_name_offset, o);
1256 }
1257 return o;
1258 }
1259
1260 oop java_lang_Class::source_file(oop java_class) {
1261 assert(_source_file_offset != 0, "must be set");
1262 return java_class->obj_field(_source_file_offset);
1263 }
1264
1265 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1266 assert(_source_file_offset != 0, "must be set");
1267 java_class->obj_field_put(_source_file_offset, source_file);
1268 }
1269
1270 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1271 // This should be improved by adding a field at the Java level or by
1272 // introducing a new VM klass (see comment in ClassFileParser)
1273 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1274 if (type != T_VOID) {
1275 Klass* aklass = Universe::typeArrayKlassObj(type);
1276 assert(aklass != nullptr, "correct bootstrap");
1277 release_set_array_klass(java_class, aklass);
1278 }
1279 #ifdef ASSERT
1280 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1281 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1282 #endif
1283 return java_class;
1284 }
1285
1286 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1287 assert(is_instance(java_class), "must be a Class object");
1288 java_class->metadata_field_put(_klass_offset, klass);
1289 }
1290
1291
1292 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1293 assert(is_instance(java_class), "must be a Class object");
1294 Symbol* name = nullptr;
1295 bool is_instance = false;
1296 if (is_primitive(java_class)) {
1297 name = vmSymbols::type_signature(primitive_type(java_class));
1298 } else {
1299 Klass* k = as_Klass(java_class);
1300 is_instance = k->is_instance_klass();
1301 name = k->name();
1302 }
1303 if (name == nullptr) {
1304 st->print("<null>");
1305 return;
1306 }
1307 if (is_instance) {
1308 st->print("L");
1309 }
1310 st->write((char*) name->base(), (int) name->utf8_length());
1311 if (is_instance) st->print(";");
1312 }
1313
1314 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1315 assert(is_instance(java_class), "must be a Class object");
1316 Symbol* name;
1317 if (is_primitive(java_class)) {
1318 name = vmSymbols::type_signature(primitive_type(java_class));
1319 // Because this can create a new symbol, the caller has to decrement
1320 // the refcount, so make adjustment here and below for symbols returned
1321 // that are not created or incremented due to a successful lookup.
1322 name->increment_refcount();
1323 } else {
1324 Klass* k = as_Klass(java_class);
1325 if (!k->is_instance_klass()) {
1326 name = k->name();
1327 name->increment_refcount();
1328 } else {
1329 ResourceMark rm;
1330 const char* sigstr = k->signature_name();
1331 int siglen = (int) strlen(sigstr);
1332 if (!intern_if_not_found) {
1333 name = SymbolTable::probe(sigstr, siglen);
1334 } else {
1335 name = SymbolTable::new_symbol(sigstr, siglen);
1336 }
1337 }
1338 }
1339 return name;
1340 }
1341
1342 // Returns the Java name for this Java mirror (Resource allocated)
1343 // See Klass::external_name().
1344 // For primitive type Java mirrors, its type name is returned.
1345 const char* java_lang_Class::as_external_name(oop java_class) {
1346 assert(is_instance(java_class), "must be a Class object");
1347 const char* name = nullptr;
1348 if (is_primitive(java_class)) {
1349 name = type2name(primitive_type(java_class));
1350 } else {
1351 name = as_Klass(java_class)->external_name();
1352 }
1353 if (name == nullptr) {
1354 name = "<null>";
1355 }
1356 return name;
1357 }
1358
1359 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1360 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1361 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1362 return k;
1363 }
1364
1365
1366 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1367 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1368 if (klass->is_flatArray_klass() || (klass->is_objArray_klass() && ObjArrayKlass::cast(klass)->is_null_free_array_klass())) {
1369 // TODO 8325106 Ignore flat / null-free arrays
1370 return;
1371 }
1372 java_class->release_metadata_field_put(_array_klass_offset, klass);
1373 }
1374
1375
1376 BasicType java_lang_Class::primitive_type(oop java_class) {
1377 assert(is_primitive(java_class), "just checking");
1378 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1379 BasicType type = T_VOID;
1380 if (ak != nullptr) {
1381 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1382 type = ArrayKlass::cast(ak)->element_type();
1383 } else {
1384 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1385 }
1386 #ifdef ASSERT
1387 if (CDSConfig::is_dumping_heap()) {
1388 oop mirror = Universe::java_mirror(type);
1389 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1390 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1391 } else {
1392 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1393 }
1394 #endif
1395 return type;
1396 }
1397
1398 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1399 assert(is_instance(java_class), "must be a Class object");
1400 if (is_primitive(java_class)) {
1401 if (reference_klass != nullptr)
1402 (*reference_klass) = nullptr;
1403 return primitive_type(java_class);
1404 } else {
1405 if (reference_klass != nullptr)
1406 (*reference_klass) = as_Klass(java_class);
1407 return T_OBJECT;
1408 }
1409 }
1410
1411
1412 oop java_lang_Class::primitive_mirror(BasicType t) {
1413 oop mirror = Universe::java_mirror(t);
1414 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1415 assert(is_primitive(mirror), "must be primitive");
1416 return mirror;
1417 }
1418
1419 #define CLASS_FIELDS_DO(macro) \
1420 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1421 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1422 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1423 macro(_module_offset, k, "module", module_signature, false); \
1424 macro(_name_offset, k, "name", string_signature, false); \
1425 macro(_classData_offset, k, "classData", object_signature, false);
1426
1427 void java_lang_Class::compute_offsets() {
1428 if (_offsets_computed) {
1429 return;
1430 }
1431
1432 _offsets_computed = true;
1433
1434 InstanceKlass* k = vmClasses::Class_klass();
1435 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1436
1437 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1438 }
1439
1440 #if INCLUDE_CDS
1441 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1442 f->do_bool(&_offsets_computed);
1443
1444 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1445
1446 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1447 }
1448 #endif
1449
1450 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1451 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1452 return the_class_mirror->int_field(_classRedefinedCount_offset);
1453 }
1454
1455 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1456 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1457 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1458 }
1459
1460
1461 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1462 // platform thread structure, and a eetop offset which was used for thread
1463 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1464 // merged, so in the HotSpot VM we just use the eetop field for the thread
1465 // instead of the privateInfo_offset.
1466 //
1467 // Note: The stackSize field is only present starting in 1.4.
1468
1469 int java_lang_Thread_FieldHolder::_group_offset;
1470 int java_lang_Thread_FieldHolder::_priority_offset;
1471 int java_lang_Thread_FieldHolder::_stackSize_offset;
1472 int java_lang_Thread_FieldHolder::_daemon_offset;
1473 int java_lang_Thread_FieldHolder::_thread_status_offset;
1474
1475 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1476 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1477 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1478 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1479 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1480 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1481
1482 void java_lang_Thread_FieldHolder::compute_offsets() {
1483 assert(_group_offset == 0, "offsets should be initialized only once");
1484
1485 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1486 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1487 }
1488
1489 #if INCLUDE_CDS
1490 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1491 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1492 }
1493 #endif
1494
1495 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1496 return holder->obj_field(_group_offset);
1497 }
1498
1499 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1500 return (ThreadPriority)holder->int_field(_priority_offset);
1501 }
1502
1503 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1504 holder->int_field_put(_priority_offset, priority);
1505 }
1506
1507 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1508 return holder->long_field(_stackSize_offset);
1509 }
1510
1511 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1512 return holder->bool_field(_daemon_offset) != 0;
1513 }
1514
1515 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1516 assert(val, "daemon status is never turned off");
1517 holder->bool_field_put(_daemon_offset, val);
1518 }
1519
1520 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1521 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1522 }
1523
1524 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1525 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1526 }
1527
1528
1529 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1530
1531 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1532 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1533
1534 void java_lang_Thread_Constants::compute_offsets() {
1535 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1536
1537 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1538 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1539 }
1540
1541 #if INCLUDE_CDS
1542 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1543 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1544 }
1545 #endif
1546
1547 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1548 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1549 oop base = k->static_field_base_raw();
1550 return base->obj_field(_static_VTHREAD_GROUP_offset);
1551 }
1552
1553
1554 int java_lang_Thread::_holder_offset;
1555 int java_lang_Thread::_name_offset;
1556 int java_lang_Thread::_contextClassLoader_offset;
1557 int java_lang_Thread::_inheritedAccessControlContext_offset;
1558 int java_lang_Thread::_eetop_offset;
1559 int java_lang_Thread::_jvmti_thread_state_offset;
1560 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1561 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1562 int java_lang_Thread::_interrupted_offset;
1563 int java_lang_Thread::_tid_offset;
1564 int java_lang_Thread::_continuation_offset;
1565 int java_lang_Thread::_park_blocker_offset;
1566 int java_lang_Thread::_scopedValueBindings_offset;
1567 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1568
1569 #define THREAD_FIELDS_DO(macro) \
1570 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1571 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1572 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1573 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1574 macro(_eetop_offset, k, "eetop", long_signature, false); \
1575 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1576 macro(_tid_offset, k, "tid", long_signature, false); \
1577 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1578 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1579 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1580
1581 void java_lang_Thread::compute_offsets() {
1582 assert(_holder_offset == 0, "offsets should be initialized only once");
1583
1584 InstanceKlass* k = vmClasses::Thread_klass();
1585 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1586 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1587 }
1588
1589 #if INCLUDE_CDS
1590 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1591 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1592 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1593 }
1594 #endif
1595
1596 JavaThread* java_lang_Thread::thread(oop java_thread) {
1597 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1598 }
1599
1600 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1601 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1602 }
1603
1604 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1605 java_thread->address_field_put(_eetop_offset, (address)thread);
1606 }
1607
1608 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1609 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1610 }
1611
1612 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1613 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1614 }
1615
1616 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1617 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1618 }
1619
1620 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1621 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1622 }
1623
1624 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1625 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1626 int val = VTMS_transition_disable_count(java_thread);
1627 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1628 }
1629
1630 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1631 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1632 int val = VTMS_transition_disable_count(java_thread);
1633 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1634 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1635 }
1636
1637 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1638 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1639 }
1640
1641 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1642 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1643 }
1644
1645 int java_lang_Thread::is_in_VTMS_transition_offset() {
1646 return _jvmti_is_in_VTMS_transition_offset;
1647 }
1648
1649 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1650 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1651 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1652 }
1653
1654 oop java_lang_Thread::holder(oop java_thread) {
1655 // Note: may return null if the thread is still attaching
1656 return java_thread->obj_field(_holder_offset);
1657 }
1658
1659 bool java_lang_Thread::interrupted(oop java_thread) {
1660 // Make sure the caller can safely access oops.
1661 assert(Thread::current()->is_VM_thread() ||
1662 (JavaThread::current()->thread_state() != _thread_blocked &&
1663 JavaThread::current()->thread_state() != _thread_in_native),
1664 "Unsafe access to oop");
1665 return java_thread->bool_field_volatile(_interrupted_offset);
1666 }
1667
1668 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1669 // Make sure the caller can safely access oops.
1670 assert(Thread::current()->is_VM_thread() ||
1671 (JavaThread::current()->thread_state() != _thread_blocked &&
1672 JavaThread::current()->thread_state() != _thread_in_native),
1673 "Unsafe access to oop");
1674 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1675 }
1676
1677
1678 oop java_lang_Thread::name(oop java_thread) {
1679 return java_thread->obj_field(_name_offset);
1680 }
1681
1682
1683 void java_lang_Thread::set_name(oop java_thread, oop name) {
1684 java_thread->obj_field_put(_name_offset, name);
1685 }
1686
1687 // Convenience macros for setting and getting Thread fields that
1688 // are actually stored in the FieldHolder object of the thread.
1689 // The FieldHolder can be null whilst a thread is attaching via
1690 // JNI, and when the main thread is attaching.
1691
1692 // The default value should be the default/zero initialized value
1693 // of the field as it would be in java.lang.Thread.FieldHolder.
1694 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1695 { \
1696 oop holder = java_lang_Thread::holder(java_thread); \
1697 if (holder != nullptr) \
1698 return java_lang_Thread_FieldHolder::field(holder); \
1699 else \
1700 return default_val; \
1701 }
1702
1703 // We should never be trying to set a field of an attaching thread.
1704 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1705 { \
1706 oop holder = java_lang_Thread::holder(java_thread); \
1707 assert(holder != nullptr, "Thread not fully initialized"); \
1708 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1709 }
1710
1711
1712 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1713 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1714 }
1715
1716
1717 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1718 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1719 }
1720
1721
1722 oop java_lang_Thread::threadGroup(oop java_thread) {
1723 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1724 }
1725
1726
1727 bool java_lang_Thread::is_alive(oop java_thread) {
1728 JavaThread* thr = java_lang_Thread::thread(java_thread);
1729 return (thr != nullptr);
1730 }
1731
1732
1733 bool java_lang_Thread::is_daemon(oop java_thread) {
1734 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1735 }
1736
1737
1738 void java_lang_Thread::set_daemon(oop java_thread) {
1739 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1740 }
1741
1742 oop java_lang_Thread::context_class_loader(oop java_thread) {
1743 return java_thread->obj_field(_contextClassLoader_offset);
1744 }
1745
1746 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1747 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1748 }
1749
1750
1751 jlong java_lang_Thread::stackSize(oop java_thread) {
1752 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1753 }
1754
1755 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1756 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1757 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1758 }
1759
1760 // Read thread status value from threadStatus field in java.lang.Thread java class.
1761 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1762 // Make sure the caller is operating on behalf of the VM or is
1763 // running VM code (state == _thread_in_vm).
1764 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1765 JavaThread::current()->thread_state() == _thread_in_vm,
1766 "Java Thread is not running in vm");
1767 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1768 }
1769
1770 ByteSize java_lang_Thread::thread_id_offset() {
1771 return in_ByteSize(_tid_offset);
1772 }
1773
1774 oop java_lang_Thread::park_blocker(oop java_thread) {
1775 return java_thread->obj_field(_park_blocker_offset);
1776 }
1777
1778 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1779 ThreadsListHandle tlh(JavaThread::current());
1780 JavaThread* thread;
1781 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1782 if (is_virtual) {
1783 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1784 if (carrier_thread == nullptr) {
1785 return nullptr;
1786 }
1787 thread = java_lang_Thread::thread(carrier_thread);
1788 } else {
1789 thread = java_lang_Thread::thread(java_thread);
1790 }
1791 if (thread == nullptr) {
1792 return nullptr;
1793 }
1794
1795 class GetStackTraceClosure : public HandshakeClosure {
1796 public:
1797 const Handle _java_thread;
1798 int _depth;
1799 bool _retry_handshake;
1800 GrowableArray<Method*>* _methods;
1801 GrowableArray<int>* _bcis;
1802
1803 GetStackTraceClosure(Handle java_thread) :
1804 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1805 _methods(nullptr), _bcis(nullptr) {
1806 }
1807 ~GetStackTraceClosure() {
1808 delete _methods;
1809 delete _bcis;
1810 }
1811
1812 bool read_reset_retry() {
1813 bool ret = _retry_handshake;
1814 // If we re-execute the handshake this method need to return false
1815 // when the handshake cannot be performed. (E.g. thread terminating)
1816 _retry_handshake = false;
1817 return ret;
1818 }
1819
1820 void do_thread(Thread* th) {
1821 if (!Thread::current()->is_Java_thread()) {
1822 _retry_handshake = true;
1823 return;
1824 }
1825
1826 JavaThread* thread = JavaThread::cast(th);
1827
1828 if (!thread->has_last_Java_frame()) {
1829 return;
1830 }
1831
1832 bool carrier = false;
1833 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1834 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1835 const ContinuationEntry* ce = thread->vthread_continuation();
1836 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1837 return; // not mounted
1838 }
1839 } else {
1840 carrier = (thread->vthread_continuation() != nullptr);
1841 }
1842
1843 const int max_depth = MaxJavaStackTraceDepth;
1844 const bool skip_hidden = !ShowHiddenFrames;
1845
1846 // Pick minimum length that will cover most cases
1847 int init_length = 64;
1848 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1849 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1850
1851 int total_count = 0;
1852 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1853 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1854 vfst.next()) {
1855
1856 if (skip_hidden && (vfst.method()->is_hidden() ||
1857 vfst.method()->is_continuation_enter_intrinsic())) {
1858 continue;
1859 }
1860
1861 _methods->push(vfst.method());
1862 _bcis->push(vfst.bci());
1863 total_count++;
1864 }
1865
1866 _depth = total_count;
1867 }
1868 };
1869
1870 // Handshake with target
1871 ResourceMark rm(THREAD);
1872 HandleMark hm(THREAD);
1873 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1874 do {
1875 Handshake::execute(&gstc, &tlh, thread);
1876 } while (gstc.read_reset_retry());
1877
1878 // Stop if no stack trace is found.
1879 if (gstc._depth == 0) {
1880 return nullptr;
1881 }
1882
1883 // Convert to StackTraceElement array
1884 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1885 assert(k != nullptr, "must be loaded in 1.4+");
1886 if (k->should_be_initialized()) {
1887 k->initialize(CHECK_NULL);
1888 }
1889 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1890
1891 for (int i = 0; i < gstc._depth; i++) {
1892 methodHandle method(THREAD, gstc._methods->at(i));
1893 oop element = java_lang_StackTraceElement::create(method,
1894 gstc._bcis->at(i),
1895 CHECK_NULL);
1896 trace->obj_at_put(i, element);
1897 }
1898
1899 return trace();
1900 }
1901
1902 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1903 JavaThreadStatus status = get_thread_status(java_thread);
1904 switch (status) {
1905 case JavaThreadStatus::NEW : return "NEW";
1906 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
1907 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
1908 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1909 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1910 case JavaThreadStatus::PARKED : return "WAITING (parking)";
1911 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
1912 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1913 case JavaThreadStatus::TERMINATED : return "TERMINATED";
1914 default : return "UNKNOWN";
1915 };
1916 }
1917 int java_lang_ThreadGroup::_parent_offset;
1918 int java_lang_ThreadGroup::_name_offset;
1919 int java_lang_ThreadGroup::_maxPriority_offset;
1920 int java_lang_ThreadGroup::_daemon_offset;
1921
1922 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1923 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1924 return java_thread_group->obj_field(_parent_offset);
1925 }
1926
1927 // ("name as oop" accessor is not necessary)
1928
1929 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1930 oop name = java_thread_group->obj_field(_name_offset);
1931 // ThreadGroup.name can be null
1932 if (name != nullptr) {
1933 return java_lang_String::as_utf8_string(name);
1934 }
1935 return nullptr;
1936 }
1937
1938 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1939 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1940 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1941 }
1942
1943 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1944 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1945 return java_thread_group->bool_field(_daemon_offset) != 0;
1946 }
1947
1948 #define THREADGROUP_FIELDS_DO(macro) \
1949 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1950 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1951 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1952 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
1953
1954 void java_lang_ThreadGroup::compute_offsets() {
1955 assert(_parent_offset == 0, "offsets should be initialized only once");
1956
1957 InstanceKlass* k = vmClasses::ThreadGroup_klass();
1958 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1959 }
1960
1961 #if INCLUDE_CDS
1962 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1963 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1964 }
1965 #endif
1966
1967
1968 // java_lang_VirtualThread
1969
1970 int java_lang_VirtualThread::static_vthread_scope_offset;
1971 int java_lang_VirtualThread::_carrierThread_offset;
1972 int java_lang_VirtualThread::_continuation_offset;
1973 int java_lang_VirtualThread::_state_offset;
1974
1975 #define VTHREAD_FIELDS_DO(macro) \
1976 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
1977 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
1978 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1979 macro(_state_offset, k, "state", int_signature, false)
1980
1981
1982 void java_lang_VirtualThread::compute_offsets() {
1983 InstanceKlass* k = vmClasses::VirtualThread_klass();
1984 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1985 }
1986
1987 bool java_lang_VirtualThread::is_instance(oop obj) {
1988 return obj != nullptr && is_subclass(obj->klass());
1989 }
1990
1991 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
1992 oop thread = vthread->obj_field(_carrierThread_offset);
1993 return thread;
1994 }
1995
1996 oop java_lang_VirtualThread::continuation(oop vthread) {
1997 oop cont = vthread->obj_field(_continuation_offset);
1998 return cont;
1999 }
2000
2001 int java_lang_VirtualThread::state(oop vthread) {
2002 return vthread->int_field_acquire(_state_offset);
2003 }
2004
2005 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2006 JavaThreadStatus status = JavaThreadStatus::NEW;
2007 switch (state & ~SUSPENDED) {
2008 case NEW:
2009 status = JavaThreadStatus::NEW;
2010 break;
2011 case STARTED:
2012 case RUNNING:
2013 case PARKING:
2014 case TIMED_PARKING:
2015 case UNPARKED:
2016 case YIELDING:
2017 case YIELDED:
2018 status = JavaThreadStatus::RUNNABLE;
2019 break;
2020 case PARKED:
2021 case PINNED:
2022 status = JavaThreadStatus::PARKED;
2023 break;
2024 case TIMED_PARKED:
2025 case TIMED_PINNED:
2026 status = JavaThreadStatus::PARKED_TIMED;
2027 break;
2028 case TERMINATED:
2029 status = JavaThreadStatus::TERMINATED;
2030 break;
2031 default:
2032 ShouldNotReachHere();
2033 }
2034 return status;
2035 }
2036
2037 #if INCLUDE_CDS
2038 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2039 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2040 }
2041 #endif
2042
2043 // java_lang_Throwable
2044
2045 int java_lang_Throwable::_backtrace_offset;
2046 int java_lang_Throwable::_detailMessage_offset;
2047 int java_lang_Throwable::_stackTrace_offset;
2048 int java_lang_Throwable::_depth_offset;
2049 int java_lang_Throwable::_cause_offset;
2050 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2051
2052 #define THROWABLE_FIELDS_DO(macro) \
2053 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2054 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2055 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2056 macro(_depth_offset, k, "depth", int_signature, false); \
2057 macro(_cause_offset, k, "cause", throwable_signature, false); \
2058 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2059
2060 void java_lang_Throwable::compute_offsets() {
2061 InstanceKlass* k = vmClasses::Throwable_klass();
2062 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2063 }
2064
2065 #if INCLUDE_CDS
2066 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2067 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2068 }
2069 #endif
2070
2071 oop java_lang_Throwable::unassigned_stacktrace() {
2072 InstanceKlass* ik = vmClasses::Throwable_klass();
2073 oop base = ik->static_field_base_raw();
2074 return base->obj_field(_static_unassigned_stacktrace_offset);
2075 }
2076
2077 oop java_lang_Throwable::backtrace(oop throwable) {
2078 return throwable->obj_field_acquire(_backtrace_offset);
2079 }
2080
2081
2082 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2083 throwable->release_obj_field_put(_backtrace_offset, value);
2084 }
2085
2086 int java_lang_Throwable::depth(oop throwable) {
2087 return throwable->int_field(_depth_offset);
2088 }
2089
2090 void java_lang_Throwable::set_depth(oop throwable, int value) {
2091 throwable->int_field_put(_depth_offset, value);
2092 }
2093
2094 oop java_lang_Throwable::message(oop throwable) {
2095 return throwable->obj_field(_detailMessage_offset);
2096 }
2097
2098 oop java_lang_Throwable::cause(oop throwable) {
2099 return throwable->obj_field(_cause_offset);
2100 }
2101
2102 // Return Symbol for detailed_message or null
2103 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2104 PreserveExceptionMark pm(Thread::current());
2105 oop detailed_message = java_lang_Throwable::message(throwable);
2106 if (detailed_message != nullptr) {
2107 return java_lang_String::as_symbol(detailed_message);
2108 }
2109 return nullptr;
2110 }
2111
2112 void java_lang_Throwable::set_message(oop throwable, oop value) {
2113 throwable->obj_field_put(_detailMessage_offset, value);
2114 }
2115
2116
2117 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2118 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2119 }
2120
2121 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2122 set_stacktrace(throwable, nullptr);
2123 }
2124
2125
2126 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2127 ResourceMark rm;
2128 Klass* k = throwable->klass();
2129 assert(k != nullptr, "just checking");
2130 st->print("%s", k->external_name());
2131 oop msg = message(throwable);
2132 if (msg != nullptr) {
2133 st->print(": %s", java_lang_String::as_utf8_string(msg));
2134 }
2135 }
2136
2137 // After this many redefines, the stack trace is unreliable.
2138 const int MAX_VERSION = USHRT_MAX;
2139
2140 static inline bool version_matches(Method* method, int version) {
2141 assert(version < MAX_VERSION, "version is too big");
2142 return method != nullptr && (method->constants()->version() == version);
2143 }
2144
2145 // This class provides a simple wrapper over the internal structure of
2146 // exception backtrace to insulate users of the backtrace from needing
2147 // to know what it looks like.
2148 // The code of this class is not GC safe. Allocations can only happen
2149 // in expand().
2150 class BacktraceBuilder: public StackObj {
2151 friend class BacktraceIterator;
2152 private:
2153 Handle _backtrace;
2154 objArrayOop _head;
2155 typeArrayOop _methods;
2156 typeArrayOop _bcis;
2157 objArrayOop _mirrors;
2158 typeArrayOop _names; // Needed to insulate method name against redefinition.
2159 // True if the top frame of the backtrace is omitted because it shall be hidden.
2160 bool _has_hidden_top_frame;
2161 int _index;
2162 NoSafepointVerifier _nsv;
2163
2164 enum {
2165 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2166 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2167 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2168 trace_names_offset = java_lang_Throwable::trace_names_offset,
2169 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2170 trace_next_offset = java_lang_Throwable::trace_next_offset,
2171 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2172 trace_size = java_lang_Throwable::trace_size,
2173 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2174 };
2175
2176 // get info out of chunks
2177 static typeArrayOop get_methods(objArrayHandle chunk) {
2178 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2179 assert(methods != nullptr, "method array should be initialized in backtrace");
2180 return methods;
2181 }
2182 static typeArrayOop get_bcis(objArrayHandle chunk) {
2183 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2184 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2185 return bcis;
2186 }
2187 static objArrayOop get_mirrors(objArrayHandle chunk) {
2188 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2189 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2190 return mirrors;
2191 }
2192 static typeArrayOop get_names(objArrayHandle chunk) {
2193 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2194 assert(names != nullptr, "names array should be initialized in backtrace");
2195 return names;
2196 }
2197 static bool has_hidden_top_frame(objArrayHandle chunk) {
2198 oop hidden = chunk->obj_at(trace_hidden_offset);
2199 return hidden != nullptr;
2200 }
2201
2202 public:
2203
2204 // constructor for new backtrace
2205 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2206 expand(CHECK);
2207 _backtrace = Handle(THREAD, _head);
2208 _index = 0;
2209 }
2210
2211 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2212 _methods = get_methods(backtrace);
2213 _bcis = get_bcis(backtrace);
2214 _mirrors = get_mirrors(backtrace);
2215 _names = get_names(backtrace);
2216 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2217 assert(_methods->length() == _bcis->length() &&
2218 _methods->length() == _mirrors->length() &&
2219 _mirrors->length() == _names->length(),
2220 "method and source information arrays should match");
2221
2222 // head is the preallocated backtrace
2223 _head = backtrace();
2224 _backtrace = Handle(thread, _head);
2225 _index = 0;
2226 }
2227
2228 void expand(TRAPS) {
2229 objArrayHandle old_head(THREAD, _head);
2230 PauseNoSafepointVerifier pnsv(&_nsv);
2231
2232 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2233 objArrayHandle new_head(THREAD, head);
2234
2235 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2236 typeArrayHandle new_methods(THREAD, methods);
2237
2238 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2239 typeArrayHandle new_bcis(THREAD, bcis);
2240
2241 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2242 objArrayHandle new_mirrors(THREAD, mirrors);
2243
2244 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2245 typeArrayHandle new_names(THREAD, names);
2246
2247 if (!old_head.is_null()) {
2248 old_head->obj_at_put(trace_next_offset, new_head());
2249 }
2250 new_head->obj_at_put(trace_methods_offset, new_methods());
2251 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2252 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2253 new_head->obj_at_put(trace_names_offset, new_names());
2254 new_head->obj_at_put(trace_hidden_offset, nullptr);
2255
2256 _head = new_head();
2257 _methods = new_methods();
2258 _bcis = new_bcis();
2259 _mirrors = new_mirrors();
2260 _names = new_names();
2261 _index = 0;
2262 }
2263
2264 oop backtrace() {
2265 return _backtrace();
2266 }
2267
2268 inline void push(Method* method, int bci, TRAPS) {
2269 // Smear the -1 bci to 0 since the array only holds unsigned
2270 // shorts. The later line number lookup would just smear the -1
2271 // to a 0 even if it could be recorded.
2272 if (bci == SynchronizationEntryBCI) bci = 0;
2273
2274 if (_index >= trace_chunk_size) {
2275 methodHandle mhandle(THREAD, method);
2276 expand(CHECK);
2277 method = mhandle();
2278 }
2279
2280 _methods->ushort_at_put(_index, method->orig_method_idnum());
2281 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2282
2283 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2284 // klass owning the symbols alive so their refcounts aren't decremented.
2285 Symbol* name = method->name();
2286 _names->symbol_at_put(_index, name);
2287
2288 // We need to save the mirrors in the backtrace to keep the class
2289 // from being unloaded while we still have this stack trace.
2290 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2291 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2292
2293 _index++;
2294 }
2295
2296 void set_has_hidden_top_frame() {
2297 if (!_has_hidden_top_frame) {
2298 // It would be nice to add java/lang/Boolean::TRUE here
2299 // to indicate that this backtrace has a hidden top frame.
2300 // But this code is used before TRUE is allocated.
2301 // Therefore let's just use an arbitrary legal oop
2302 // available right here. _methods is a short[].
2303 assert(_methods != nullptr, "we need a legal oop");
2304 _has_hidden_top_frame = true;
2305 _head->obj_at_put(trace_hidden_offset, _methods);
2306 }
2307 }
2308 };
2309
2310 struct BacktraceElement : public StackObj {
2311 int _method_id;
2312 int _bci;
2313 int _version;
2314 Symbol* _name;
2315 Handle _mirror;
2316 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2317 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2318 };
2319
2320 class BacktraceIterator : public StackObj {
2321 int _index;
2322 objArrayHandle _result;
2323 objArrayHandle _mirrors;
2324 typeArrayHandle _methods;
2325 typeArrayHandle _bcis;
2326 typeArrayHandle _names;
2327
2328 void init(objArrayHandle result, Thread* thread) {
2329 // Get method id, bci, version and mirror from chunk
2330 _result = result;
2331 if (_result.not_null()) {
2332 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2333 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2334 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2335 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2336 _index = 0;
2337 }
2338 }
2339 public:
2340 BacktraceIterator(objArrayHandle result, Thread* thread) {
2341 init(result, thread);
2342 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2343 }
2344
2345 BacktraceElement next(Thread* thread) {
2346 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2347 _methods->ushort_at(_index),
2348 Backtrace::version_at(_bcis->int_at(_index)),
2349 Backtrace::bci_at(_bcis->int_at(_index)),
2350 _names->symbol_at(_index));
2351 _index++;
2352
2353 if (_index >= java_lang_Throwable::trace_chunk_size) {
2354 int next_offset = java_lang_Throwable::trace_next_offset;
2355 // Get next chunk
2356 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2357 init(result, thread);
2358 }
2359 return e;
2360 }
2361
2362 bool repeat() {
2363 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2364 }
2365 };
2366
2367
2368 // Print stack trace element to resource allocated buffer
2369 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2370 int version, int bci, Symbol* name) {
2371 ResourceMark rm;
2372
2373 // Get strings and string lengths
2374 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2375 const char* klass_name = holder->external_name();
2376 int buf_len = (int)strlen(klass_name);
2377
2378 char* method_name = name->as_C_string();
2379 buf_len += (int)strlen(method_name);
2380
2381 char* source_file_name = nullptr;
2382 Symbol* source = Backtrace::get_source_file_name(holder, version);
2383 if (source != nullptr) {
2384 source_file_name = source->as_C_string();
2385 buf_len += (int)strlen(source_file_name);
2386 }
2387
2388 char *module_name = nullptr, *module_version = nullptr;
2389 ModuleEntry* module = holder->module();
2390 if (module->is_named()) {
2391 module_name = module->name()->as_C_string();
2392 buf_len += (int)strlen(module_name);
2393 if (module->version() != nullptr) {
2394 module_version = module->version()->as_C_string();
2395 buf_len += (int)strlen(module_version);
2396 }
2397 }
2398
2399 // Allocate temporary buffer with extra space for formatting and line number
2400 const size_t buf_size = buf_len + 64;
2401 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2402
2403 // Print stack trace line in buffer
2404 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2405
2406 // Print module information
2407 if (module_name != nullptr) {
2408 if (module_version != nullptr) {
2409 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2410 } else {
2411 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2412 }
2413 }
2414
2415 // The method can be null if the requested class version is gone
2416 Method* method = holder->method_with_orig_idnum(method_id, version);
2417 if (!version_matches(method, version)) {
2418 strcat(buf, "Redefined)");
2419 } else {
2420 int line_number = Backtrace::get_line_number(method, bci);
2421 if (line_number == -2) {
2422 strcat(buf, "Native Method)");
2423 } else {
2424 if (source_file_name != nullptr && (line_number != -1)) {
2425 // Sourcename and linenumber
2426 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2427 } else if (source_file_name != nullptr) {
2428 // Just sourcename
2429 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2430 } else {
2431 // Neither sourcename nor linenumber
2432 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2433 }
2434 CompiledMethod* nm = method->code();
2435 if (WizardMode && nm != nullptr) {
2436 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2437 }
2438 }
2439 }
2440
2441 st->print_cr("%s", buf);
2442 }
2443
2444 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2445 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2446 int method_id = method->orig_method_idnum();
2447 int version = method->constants()->version();
2448 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2449 }
2450
2451 /**
2452 * Print the throwable message and its stack trace plus all causes by walking the
2453 * cause chain. The output looks the same as of Throwable.printStackTrace().
2454 */
2455 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2456 // First, print the message.
2457 print(throwable(), st);
2458 st->cr();
2459
2460 // Now print the stack trace.
2461 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2462 while (throwable.not_null()) {
2463 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2464 if (result.is_null()) {
2465 st->print_raw_cr("\t<<no stack trace available>>");
2466 return;
2467 }
2468 BacktraceIterator iter(result, THREAD);
2469
2470 while (iter.repeat()) {
2471 BacktraceElement bte = iter.next(THREAD);
2472 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2473 }
2474 if (THREAD->can_call_java()) {
2475 // Call getCause() which doesn't necessarily return the _cause field.
2476 ExceptionMark em(THREAD);
2477 JavaValue cause(T_OBJECT);
2478 JavaCalls::call_virtual(&cause,
2479 throwable,
2480 throwable->klass(),
2481 vmSymbols::getCause_name(),
2482 vmSymbols::void_throwable_signature(),
2483 THREAD);
2484 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2485 if (HAS_PENDING_EXCEPTION) {
2486 CLEAR_PENDING_EXCEPTION;
2487 throwable = Handle();
2488 } else {
2489 throwable = Handle(THREAD, cause.get_oop());
2490 if (throwable.not_null()) {
2491 st->print("Caused by: ");
2492 print(throwable(), st);
2493 st->cr();
2494 }
2495 }
2496 } else {
2497 st->print_raw_cr("<<cannot call Java to get cause>>");
2498 return;
2499 }
2500 }
2501 }
2502
2503 /**
2504 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2505 */
2506 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2507 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2508 JavaValue result(T_VOID);
2509 JavaCalls::call_virtual(&result,
2510 throwable,
2511 vmClasses::Throwable_klass(),
2512 vmSymbols::printStackTrace_name(),
2513 vmSymbols::void_method_signature(),
2514 THREAD);
2515 }
2516
2517 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2518 if (!StackTraceInThrowable) return;
2519 ResourceMark rm(THREAD);
2520
2521 // Start out by clearing the backtrace for this object, in case the VM
2522 // runs out of memory while allocating the stack trace
2523 set_backtrace(throwable(), nullptr);
2524 // Clear lazily constructed Java level stacktrace if refilling occurs
2525 // This is unnecessary in 1.7+ but harmless
2526 clear_stacktrace(throwable());
2527
2528 int max_depth = MaxJavaStackTraceDepth;
2529 JavaThread* thread = THREAD;
2530
2531 BacktraceBuilder bt(CHECK);
2532
2533 // If there is no Java frame just return the method that was being called
2534 // with bci 0
2535 if (!thread->has_last_Java_frame()) {
2536 if (max_depth >= 1 && method() != nullptr) {
2537 bt.push(method(), 0, CHECK);
2538 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2539 set_depth(throwable(), 1);
2540 set_backtrace(throwable(), bt.backtrace());
2541 }
2542 return;
2543 }
2544
2545 // Instead of using vframe directly, this version of fill_in_stack_trace
2546 // basically handles everything by hand. This significantly improved the
2547 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2548 // See bug 6333838 for more details.
2549 // The "ASSERT" here is to verify this method generates the exactly same stack
2550 // trace as utilizing vframe.
2551 #ifdef ASSERT
2552 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2553 #endif
2554 int total_count = 0;
2555 RegisterMap map(thread,
2556 RegisterMap::UpdateMap::skip,
2557 RegisterMap::ProcessFrames::skip,
2558 RegisterMap::WalkContinuation::include);
2559 int decode_offset = 0;
2560 CompiledMethod* nm = nullptr;
2561 bool skip_fillInStackTrace_check = false;
2562 bool skip_throwableInit_check = false;
2563 bool skip_hidden = !ShowHiddenFrames;
2564 bool show_carrier = ShowCarrierFrames;
2565 ContinuationEntry* cont_entry = thread->last_continuation();
2566 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2567 Method* method = nullptr;
2568 int bci = 0;
2569
2570 // Compiled java method case.
2571 if (decode_offset != 0) {
2572 DebugInfoReadStream stream(nm, decode_offset);
2573 decode_offset = stream.read_int();
2574 method = (Method*)nm->metadata_at(stream.read_int());
2575 bci = stream.read_bci();
2576 } else {
2577 if (fr.is_first_frame()) break;
2578
2579 if (Continuation::is_continuation_enterSpecial(fr)) {
2580 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2581 if (!show_carrier && cont_entry->is_virtual_thread()) {
2582 break;
2583 }
2584 cont_entry = cont_entry->parent();
2585 }
2586
2587 address pc = fr.pc();
2588 if (fr.is_interpreted_frame()) {
2589 address bcp;
2590 if (!map.in_cont()) {
2591 bcp = fr.interpreter_frame_bcp();
2592 method = fr.interpreter_frame_method();
2593 } else {
2594 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2595 method = map.stack_chunk()->interpreter_frame_method(fr);
2596 }
2597 bci = method->bci_from(bcp);
2598 fr = fr.sender(&map);
2599 } else {
2600 CodeBlob* cb = fr.cb();
2601 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2602 // but non nmethod
2603 fr = fr.sender(&map);
2604 if (cb == nullptr || !cb->is_compiled()) {
2605 continue;
2606 }
2607 nm = cb->as_compiled_method();
2608 assert(nm->method() != nullptr, "must be");
2609 if (nm->method()->is_native()) {
2610 method = nm->method();
2611 bci = 0;
2612 } else {
2613 PcDesc* pd = nm->pc_desc_at(pc);
2614 decode_offset = pd->scope_decode_offset();
2615 // if decode_offset is not equal to 0, it will execute the
2616 // "compiled java method case" at the beginning of the loop.
2617 continue;
2618 }
2619 }
2620 }
2621 #ifdef ASSERT
2622 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2623 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2624 st.next();
2625 }
2626 #endif
2627
2628 // the format of the stacktrace will be:
2629 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2630 // - 0 or more <init> methods for the exception class (skipped)
2631 // - rest of the stack
2632
2633 if (!skip_fillInStackTrace_check) {
2634 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2635 throwable->is_a(method->method_holder())) {
2636 continue;
2637 }
2638 else {
2639 skip_fillInStackTrace_check = true; // gone past them all
2640 }
2641 }
2642 if (!skip_throwableInit_check) {
2643 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2644
2645 // skip <init> methods of the exception class and superclasses
2646 // This is similar to classic VM.
2647 if (method->is_object_constructor() &&
2648 throwable->is_a(method->method_holder())) {
2649 continue;
2650 } else {
2651 // there are none or we've seen them all - either way stop checking
2652 skip_throwableInit_check = true;
2653 }
2654 }
2655 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2656 if (skip_hidden) {
2657 if (total_count == 0) {
2658 // The top frame will be hidden from the stack trace.
2659 bt.set_has_hidden_top_frame();
2660 }
2661 continue;
2662 }
2663 }
2664
2665 bt.push(method, bci, CHECK);
2666 total_count++;
2667 }
2668
2669 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2670
2671 // Put completed stack trace into throwable object
2672 set_backtrace(throwable(), bt.backtrace());
2673 set_depth(throwable(), total_count);
2674 }
2675
2676 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2677 // No-op if stack trace is disabled
2678 if (!StackTraceInThrowable) {
2679 return;
2680 }
2681
2682 // Disable stack traces for some preallocated out of memory errors
2683 if (!Universe::should_fill_in_stack_trace(throwable)) {
2684 return;
2685 }
2686
2687 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2688 PreserveExceptionMark pm(THREAD);
2689
2690 fill_in_stack_trace(throwable, method, THREAD);
2691 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2692 // original exception via the PreserveExceptionMark destructor.
2693 CLEAR_PENDING_EXCEPTION;
2694 }
2695
2696 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2697 // Allocate stack trace - backtrace is created but not filled in
2698
2699 // No-op if stack trace is disabled
2700 if (!StackTraceInThrowable) return;
2701 BacktraceBuilder bt(CHECK); // creates a backtrace
2702 set_backtrace(throwable(), bt.backtrace());
2703 }
2704
2705
2706 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2707 // Fill in stack trace into preallocated backtrace (no GC)
2708
2709 // No-op if stack trace is disabled
2710 if (!StackTraceInThrowable) return;
2711
2712 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2713
2714 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2715
2716 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2717 assert(backtrace.not_null(), "backtrace should have been preallocated");
2718
2719 ResourceMark rm(THREAD);
2720 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2721
2722 BacktraceBuilder bt(THREAD, backtrace);
2723
2724 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2725 // methods as preallocated errors aren't created by "java" code.
2726
2727 // fill in as much stack trace as possible
2728 int chunk_count = 0;
2729 for (;!st.at_end(); st.next()) {
2730 bt.push(st.method(), st.bci(), CHECK);
2731 chunk_count++;
2732
2733 // Bail-out for deep stacks
2734 if (chunk_count >= trace_chunk_size) break;
2735 }
2736 set_depth(throwable(), chunk_count);
2737 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2738
2739 // We support the Throwable immutability protocol defined for Java 7.
2740 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2741 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2742 }
2743
2744 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2745 objArrayHandle stack_trace_array_h, TRAPS) {
2746
2747 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2748 THROW(vmSymbols::java_lang_NullPointerException());
2749 }
2750
2751 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2752
2753 if (stack_trace_array_h->length() != depth) {
2754 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2755 }
2756
2757 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2758 BacktraceIterator iter(result, THREAD);
2759
2760 int index = 0;
2761 while (iter.repeat()) {
2762 BacktraceElement bte = iter.next(THREAD);
2763
2764 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2765
2766 if (stack_trace_element.is_null()) {
2767 THROW(vmSymbols::java_lang_NullPointerException());
2768 }
2769
2770 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2771 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2772
2773 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2774 method,
2775 bte._version,
2776 bte._bci,
2777 bte._name,
2778 CHECK);
2779 }
2780 }
2781
2782 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2783 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2784 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2785 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2786 // symbolic stacktrace of 'throwable'.
2787 assert(throwable.not_null(), "shouldn't be");
2788
2789 // Now create the message from the original exception and thread name.
2790 ResourceMark rm(current);
2791 const char *message = nullptr;
2792 oop detailed_message = java_lang_Throwable::message(throwable());
2793 if (detailed_message != nullptr) {
2794 message = java_lang_String::as_utf8_string(detailed_message);
2795 }
2796 stringStream st;
2797 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2798 message == nullptr ? "" : ":");
2799 if (message == nullptr) {
2800 st.print("[in thread \"%s\"]", current->name());
2801 } else {
2802 st.print("%s [in thread \"%s\"]", message, current->name());
2803 }
2804
2805 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2806 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2807 // If new_exception returns a different exception while creating the exception,
2808 // abandon the attempt to save the initialization error and return null.
2809 if (init_error->klass()->name() != exception_name) {
2810 log_info(class, init)("Exception %s thrown while saving initialization exception",
2811 init_error->klass()->external_name());
2812 return Handle();
2813 }
2814
2815 // Call to java to fill in the stack trace and clear declaringClassObject to
2816 // not keep classes alive in the stack trace.
2817 // call this: public StackTraceElement[] getStackTrace()
2818 JavaValue result(T_ARRAY);
2819 JavaCalls::call_virtual(&result, throwable,
2820 vmClasses::Throwable_klass(),
2821 vmSymbols::getStackTrace_name(),
2822 vmSymbols::getStackTrace_signature(),
2823 current);
2824 if (!current->has_pending_exception()){
2825 Handle stack_trace(current, result.get_oop());
2826 assert(stack_trace->is_objArray(), "Should be an array");
2827 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2828 // Clear backtrace because the stacktrace should be used instead.
2829 set_backtrace(init_error(), nullptr);
2830 } else {
2831 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2832 init_error->klass()->external_name());
2833 current->clear_pending_exception();
2834 }
2835
2836 return init_error;
2837 }
2838
2839 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2840 JavaThread* current = JavaThread::current();
2841 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2842 BacktraceIterator iter(result, current);
2843 // No backtrace available.
2844 if (!iter.repeat()) return false;
2845
2846 // If the exception happened in a frame that has been hidden, i.e.,
2847 // omitted from the back trace, we can not compute the message.
2848 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2849 if (hidden != nullptr) {
2850 return false;
2851 }
2852
2853 // Get first backtrace element.
2854 BacktraceElement bte = iter.next(current);
2855
2856 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2857 assert(holder != nullptr, "first element should be non-null");
2858 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2859
2860 // Original version is no longer available.
2861 if (m == nullptr || !version_matches(m, bte._version)) {
2862 return false;
2863 }
2864
2865 *method = m;
2866 *bci = bte._bci;
2867 return true;
2868 }
2869
2870 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2871 // Allocate java.lang.StackTraceElement instance
2872 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2873 assert(k != nullptr, "must be loaded in 1.4+");
2874 if (k->should_be_initialized()) {
2875 k->initialize(CHECK_NULL);
2876 }
2877
2878 Handle element = k->allocate_instance_handle(CHECK_NULL);
2879
2880 int version = method->constants()->version();
2881 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2882 return element();
2883 }
2884
2885 void java_lang_StackTraceElement::fill_in(Handle element,
2886 InstanceKlass* holder, const methodHandle& method,
2887 int version, int bci, Symbol* name, TRAPS) {
2888 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
2889
2890 ResourceMark rm(THREAD);
2891 HandleMark hm(THREAD);
2892
2893 // Fill in class name
2894 Handle java_class(THREAD, holder->java_mirror());
2895 oop classname = java_lang_Class::name(java_class, CHECK);
2896 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2897 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2898
2899 oop loader = holder->class_loader();
2900 if (loader != nullptr) {
2901 oop loader_name = java_lang_ClassLoader::name(loader);
2902 if (loader_name != nullptr)
2903 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2904 }
2905
2906 // Fill in method name
2907 oop methodname = StringTable::intern(name, CHECK);
2908 java_lang_StackTraceElement::set_methodName(element(), methodname);
2909
2910 // Fill in module name and version
2911 ModuleEntry* module = holder->module();
2912 if (module->is_named()) {
2913 oop module_name = StringTable::intern(module->name(), CHECK);
2914 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2915 oop module_version;
2916 if (module->version() != nullptr) {
2917 module_version = StringTable::intern(module->version(), CHECK);
2918 } else {
2919 module_version = nullptr;
2920 }
2921 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2922 }
2923
2924 if (method() == nullptr || !version_matches(method(), version)) {
2925 // The method was redefined, accurate line number information isn't available
2926 java_lang_StackTraceElement::set_fileName(element(), nullptr);
2927 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2928 } else {
2929 Symbol* source;
2930 oop source_file;
2931 int line_number;
2932 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
2933
2934 java_lang_StackTraceElement::set_fileName(element(), source_file);
2935 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2936 }
2937 }
2938
2939 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
2940 InstanceKlass* holder,
2941 int version,
2942 const methodHandle& method,
2943 int bci,
2944 Symbol*& source,
2945 oop& source_file,
2946 int& line_number, TRAPS) {
2947 // Fill in source file name and line number.
2948 source = Backtrace::get_source_file_name(holder, version);
2949 source_file = java_lang_Class::source_file(java_class());
2950 if (source != nullptr) {
2951 // Class was not redefined. We can trust its cache if set,
2952 // else we have to initialize it.
2953 if (source_file == nullptr) {
2954 source_file = StringTable::intern(source, CHECK);
2955 java_lang_Class::set_source_file(java_class(), source_file);
2956 }
2957 } else {
2958 // Class was redefined. Dump the cache if it was set.
2959 if (source_file != nullptr) {
2960 source_file = nullptr;
2961 java_lang_Class::set_source_file(java_class(), source_file);
2962 }
2963 }
2964 line_number = Backtrace::get_line_number(method(), bci);
2965 }
2966
2967 #if INCLUDE_JVMCI
2968 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
2969 Symbol*& filename, int& line_number, TRAPS) {
2970 ResourceMark rm(THREAD);
2971 HandleMark hm(THREAD);
2972
2973 filename = nullptr;
2974 line_number = -1;
2975
2976 oop source_file;
2977 int version = method->constants()->version();
2978 InstanceKlass* holder = method->method_holder();
2979 Handle java_class(THREAD, holder->java_mirror());
2980 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
2981 }
2982 #endif // INCLUDE_JVMCI
2983
2984 // java_lang_ClassFrameInfo
2985
2986 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
2987 int java_lang_ClassFrameInfo::_flags_offset;
2988
2989 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
2990 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
2991 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
2992
2993 void java_lang_ClassFrameInfo::compute_offsets() {
2994 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
2995 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2996 }
2997
2998 #if INCLUDE_CDS
2999 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3000 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3001 }
3002 #endif
3003
3004 static int get_flags(const methodHandle& m) {
3005 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS );
3006 if (m->is_object_constructor()) {
3007 flags |= java_lang_invoke_MemberName::MN_IS_OBJECT_CONSTRUCTOR;
3008 } else {
3009 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3010 }
3011 if (m->caller_sensitive()) {
3012 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3013 }
3014 if (m->is_hidden()) {
3015 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3016 }
3017 assert((flags & 0xFF000000) == 0, "unexpected flags");
3018 return flags;
3019 }
3020
3021 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3022 return obj->obj_field(_classOrMemberName_offset);
3023 }
3024
3025 int java_lang_ClassFrameInfo::flags(oop obj) {
3026 return obj->int_field(_flags_offset);
3027 }
3028
3029 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3030 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3031 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3032 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3033 stackFrame->int_field_put(_flags_offset, flags);
3034 }
3035
3036 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3037 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3038 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3039 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3040 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3041 stackFrame->int_field_put(_flags_offset, flags);
3042 }
3043
3044
3045 // java_lang_StackFrameInfo
3046
3047 int java_lang_StackFrameInfo::_type_offset;
3048 int java_lang_StackFrameInfo::_name_offset;
3049 int java_lang_StackFrameInfo::_bci_offset;
3050 int java_lang_StackFrameInfo::_version_offset;
3051 int java_lang_StackFrameInfo::_contScope_offset;
3052
3053 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3054 macro(_type_offset, k, "type", object_signature, false); \
3055 macro(_name_offset, k, "name", string_signature, false); \
3056 macro(_bci_offset, k, "bci", int_signature, false); \
3057 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3058
3059 void java_lang_StackFrameInfo::compute_offsets() {
3060 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3061 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3062 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3063 }
3064
3065 #if INCLUDE_CDS
3066 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3067 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3068 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3069 }
3070 #endif
3071
3072 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3073 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3074 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3075 return method;
3076 }
3077
3078 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3079 // set Method* or mid/cpref
3080 HandleMark hm(THREAD);
3081 Handle cont_h(THREAD, cont);
3082 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3083
3084 // set bci
3085 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3086 // method may be redefined; store the version
3087 int version = method->constants()->version();
3088 assert((jushort)version == version, "version should be short");
3089 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3090
3091 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3092 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3093 }
3094
3095 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3096 ResourceMark rm(THREAD);
3097 HandleMark hm(THREAD);
3098
3099 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3100 InstanceKlass* holder = method->method_holder();
3101 short version = stackFrame->short_field(_version_offset);
3102 int bci = stackFrame->int_field(_bci_offset);
3103 Symbol* name = method->name();
3104 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3105 }
3106
3107 oop java_lang_StackFrameInfo::type(oop obj) {
3108 return obj->obj_field(_type_offset);
3109 }
3110
3111 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3112 obj->obj_field_put(_type_offset, value);
3113 }
3114
3115 oop java_lang_StackFrameInfo::name(oop obj) {
3116 return obj->obj_field(_name_offset);
3117 }
3118
3119 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3120 obj->obj_field_put(_name_offset, value);
3121 }
3122
3123 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3124 obj->short_field_put(_version_offset, value);
3125 }
3126
3127 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3128 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3129 obj->int_field_put(_bci_offset, value);
3130 }
3131
3132 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3133 obj->obj_field_put(_contScope_offset, value);
3134 }
3135
3136 int java_lang_LiveStackFrameInfo::_monitors_offset;
3137 int java_lang_LiveStackFrameInfo::_locals_offset;
3138 int java_lang_LiveStackFrameInfo::_operands_offset;
3139 int java_lang_LiveStackFrameInfo::_mode_offset;
3140
3141 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3142 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3143 macro(_locals_offset, k, "locals", object_array_signature, false); \
3144 macro(_operands_offset, k, "operands", object_array_signature, false); \
3145 macro(_mode_offset, k, "mode", int_signature, false)
3146
3147 void java_lang_LiveStackFrameInfo::compute_offsets() {
3148 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3149 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3150 }
3151
3152 #if INCLUDE_CDS
3153 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3154 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3155 }
3156 #endif
3157
3158 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3159 obj->obj_field_put(_monitors_offset, value);
3160 }
3161
3162 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3163 obj->obj_field_put(_locals_offset, value);
3164 }
3165
3166 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3167 obj->obj_field_put(_operands_offset, value);
3168 }
3169
3170 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3171 obj->int_field_put(_mode_offset, value);
3172 }
3173
3174
3175 // java_lang_AccessibleObject
3176
3177 int java_lang_reflect_AccessibleObject::_override_offset;
3178
3179 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3180 macro(_override_offset, k, "override", bool_signature, false)
3181
3182 void java_lang_reflect_AccessibleObject::compute_offsets() {
3183 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3184 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3185 }
3186
3187 #if INCLUDE_CDS
3188 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3189 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3190 }
3191 #endif
3192
3193 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3194 return (jboolean) reflect->bool_field(_override_offset);
3195 }
3196
3197 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3198 reflect->bool_field_put(_override_offset, (int) value);
3199 }
3200
3201 // java_lang_reflect_Method
3202
3203 int java_lang_reflect_Method::_clazz_offset;
3204 int java_lang_reflect_Method::_name_offset;
3205 int java_lang_reflect_Method::_returnType_offset;
3206 int java_lang_reflect_Method::_parameterTypes_offset;
3207 int java_lang_reflect_Method::_exceptionTypes_offset;
3208 int java_lang_reflect_Method::_slot_offset;
3209 int java_lang_reflect_Method::_modifiers_offset;
3210 int java_lang_reflect_Method::_signature_offset;
3211 int java_lang_reflect_Method::_annotations_offset;
3212 int java_lang_reflect_Method::_parameter_annotations_offset;
3213 int java_lang_reflect_Method::_annotation_default_offset;
3214
3215 #define METHOD_FIELDS_DO(macro) \
3216 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3217 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3218 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3219 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3220 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3221 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3222 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3223 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3224 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3225 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3226 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3227
3228 void java_lang_reflect_Method::compute_offsets() {
3229 InstanceKlass* k = vmClasses::reflect_Method_klass();
3230 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3231 }
3232
3233 #if INCLUDE_CDS
3234 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3235 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3236 }
3237 #endif
3238
3239 Handle java_lang_reflect_Method::create(TRAPS) {
3240 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3241 Klass* klass = vmClasses::reflect_Method_klass();
3242 // This class is eagerly initialized during VM initialization, since we keep a reference
3243 // to one of the methods
3244 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3245 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3246 }
3247
3248 oop java_lang_reflect_Method::clazz(oop reflect) {
3249 return reflect->obj_field(_clazz_offset);
3250 }
3251
3252 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3253 reflect->obj_field_put(_clazz_offset, value);
3254 }
3255
3256 int java_lang_reflect_Method::slot(oop reflect) {
3257 return reflect->int_field(_slot_offset);
3258 }
3259
3260 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3261 reflect->int_field_put(_slot_offset, value);
3262 }
3263
3264 void java_lang_reflect_Method::set_name(oop method, oop value) {
3265 method->obj_field_put(_name_offset, value);
3266 }
3267
3268 oop java_lang_reflect_Method::return_type(oop method) {
3269 return method->obj_field(_returnType_offset);
3270 }
3271
3272 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3273 method->obj_field_put(_returnType_offset, value);
3274 }
3275
3276 oop java_lang_reflect_Method::parameter_types(oop method) {
3277 return method->obj_field(_parameterTypes_offset);
3278 }
3279
3280 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3281 method->obj_field_put(_parameterTypes_offset, value);
3282 }
3283
3284 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3285 method->obj_field_put(_exceptionTypes_offset, value);
3286 }
3287
3288 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3289 method->int_field_put(_modifiers_offset, value);
3290 }
3291
3292 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3293 method->obj_field_put(_signature_offset, value);
3294 }
3295
3296 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3297 method->obj_field_put(_annotations_offset, value);
3298 }
3299
3300 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3301 method->obj_field_put(_parameter_annotations_offset, value);
3302 }
3303
3304 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3305 method->obj_field_put(_annotation_default_offset, value);
3306 }
3307
3308 int java_lang_reflect_Constructor::_clazz_offset;
3309 int java_lang_reflect_Constructor::_parameterTypes_offset;
3310 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3311 int java_lang_reflect_Constructor::_slot_offset;
3312 int java_lang_reflect_Constructor::_modifiers_offset;
3313 int java_lang_reflect_Constructor::_signature_offset;
3314 int java_lang_reflect_Constructor::_annotations_offset;
3315 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3316
3317 #define CONSTRUCTOR_FIELDS_DO(macro) \
3318 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3319 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3320 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3321 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3322 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3323 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3324 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3325 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3326
3327 void java_lang_reflect_Constructor::compute_offsets() {
3328 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3329 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3330 }
3331
3332 #if INCLUDE_CDS
3333 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3334 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3335 }
3336 #endif
3337
3338 Handle java_lang_reflect_Constructor::create(TRAPS) {
3339 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3340 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3341 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3342 InstanceKlass* ik = InstanceKlass::cast(k);
3343 // Ensure it is initialized
3344 ik->initialize(CHECK_NH);
3345 return ik->allocate_instance_handle(THREAD);
3346 }
3347
3348 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3349 return reflect->obj_field(_clazz_offset);
3350 }
3351
3352 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3353 reflect->obj_field_put(_clazz_offset, value);
3354 }
3355
3356 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3357 return constructor->obj_field(_parameterTypes_offset);
3358 }
3359
3360 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3361 constructor->obj_field_put(_parameterTypes_offset, value);
3362 }
3363
3364 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3365 constructor->obj_field_put(_exceptionTypes_offset, value);
3366 }
3367
3368 int java_lang_reflect_Constructor::slot(oop reflect) {
3369 return reflect->int_field(_slot_offset);
3370 }
3371
3372 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3373 reflect->int_field_put(_slot_offset, value);
3374 }
3375
3376 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3377 constructor->int_field_put(_modifiers_offset, value);
3378 }
3379
3380 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3381 constructor->obj_field_put(_signature_offset, value);
3382 }
3383
3384 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3385 constructor->obj_field_put(_annotations_offset, value);
3386 }
3387
3388 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3389 method->obj_field_put(_parameter_annotations_offset, value);
3390 }
3391
3392 int java_lang_reflect_Field::_clazz_offset;
3393 int java_lang_reflect_Field::_name_offset;
3394 int java_lang_reflect_Field::_type_offset;
3395 int java_lang_reflect_Field::_slot_offset;
3396 int java_lang_reflect_Field::_modifiers_offset;
3397 int java_lang_reflect_Field::_flags_offset;
3398 int java_lang_reflect_Field::_signature_offset;
3399 int java_lang_reflect_Field::_annotations_offset;
3400
3401 #define FIELD_FIELDS_DO(macro) \
3402 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3403 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3404 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3405 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3406 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3407 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3408 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3409 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3410
3411 void java_lang_reflect_Field::compute_offsets() {
3412 InstanceKlass* k = vmClasses::reflect_Field_klass();
3413 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3414 }
3415
3416 #if INCLUDE_CDS
3417 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3418 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3419 }
3420 #endif
3421
3422 Handle java_lang_reflect_Field::create(TRAPS) {
3423 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3424 Symbol* name = vmSymbols::java_lang_reflect_Field();
3425 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3426 InstanceKlass* ik = InstanceKlass::cast(k);
3427 // Ensure it is initialized
3428 ik->initialize(CHECK_NH);
3429 return ik->allocate_instance_handle(THREAD);
3430 }
3431
3432 oop java_lang_reflect_Field::clazz(oop reflect) {
3433 return reflect->obj_field(_clazz_offset);
3434 }
3435
3436 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3437 reflect->obj_field_put(_clazz_offset, value);
3438 }
3439
3440 oop java_lang_reflect_Field::name(oop field) {
3441 return field->obj_field(_name_offset);
3442 }
3443
3444 void java_lang_reflect_Field::set_name(oop field, oop value) {
3445 field->obj_field_put(_name_offset, value);
3446 }
3447
3448 oop java_lang_reflect_Field::type(oop field) {
3449 return field->obj_field(_type_offset);
3450 }
3451
3452 void java_lang_reflect_Field::set_type(oop field, oop value) {
3453 field->obj_field_put(_type_offset, value);
3454 }
3455
3456 int java_lang_reflect_Field::slot(oop reflect) {
3457 return reflect->int_field(_slot_offset);
3458 }
3459
3460 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3461 reflect->int_field_put(_slot_offset, value);
3462 }
3463
3464 int java_lang_reflect_Field::modifiers(oop field) {
3465 return field->int_field(_modifiers_offset);
3466 }
3467
3468 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3469 field->int_field_put(_modifiers_offset, value);
3470 }
3471
3472 void java_lang_reflect_Field::set_flags(oop field, int value) {
3473 field->int_field_put(_flags_offset, value);
3474 }
3475
3476 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3477 field->obj_field_put(_signature_offset, value);
3478 }
3479
3480 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3481 field->obj_field_put(_annotations_offset, value);
3482 }
3483
3484 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3485 // Allocate java.lang.reflect.RecordComponent instance
3486 HandleMark hm(THREAD);
3487 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3488 assert(ik != nullptr, "must be loaded");
3489 ik->initialize(CHECK_NULL);
3490
3491 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3492
3493 Handle decl_class(THREAD, holder->java_mirror());
3494 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3495
3496 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3497 oop component_name = StringTable::intern(name, CHECK_NULL);
3498 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3499
3500 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3501 Handle component_type_h =
3502 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3503 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3504
3505 Method* accessor_method = nullptr;
3506 {
3507 // Prepend "()" to type to create the full method signature.
3508 ResourceMark rm(THREAD);
3509 int sig_len = type->utf8_length() + 3; // "()" and null char
3510 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3511 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3512 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3513 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3514 }
3515
3516 if (accessor_method != nullptr) {
3517 methodHandle method(THREAD, accessor_method);
3518 oop m = Reflection::new_method(method, false, CHECK_NULL);
3519 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3520 } else {
3521 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3522 }
3523
3524 int sig_index = component->generic_signature_index();
3525 if (sig_index > 0) {
3526 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3527 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3528 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3529 } else {
3530 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3531 }
3532
3533 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3534 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3535
3536 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3537 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3538
3539 return element();
3540 }
3541
3542 int reflect_ConstantPool::_oop_offset;
3543
3544 #define CONSTANTPOOL_FIELDS_DO(macro) \
3545 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3546
3547 void reflect_ConstantPool::compute_offsets() {
3548 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3549 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3550 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3551 }
3552
3553 #if INCLUDE_CDS
3554 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3555 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3556 }
3557 #endif
3558
3559 int java_lang_reflect_Parameter::_name_offset;
3560 int java_lang_reflect_Parameter::_modifiers_offset;
3561 int java_lang_reflect_Parameter::_index_offset;
3562 int java_lang_reflect_Parameter::_executable_offset;
3563
3564 #define PARAMETER_FIELDS_DO(macro) \
3565 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3566 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3567 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3568 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3569
3570 void java_lang_reflect_Parameter::compute_offsets() {
3571 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3572 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3573 }
3574
3575 #if INCLUDE_CDS
3576 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3577 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3578 }
3579 #endif
3580
3581 Handle java_lang_reflect_Parameter::create(TRAPS) {
3582 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3583 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3584 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3585 InstanceKlass* ik = InstanceKlass::cast(k);
3586 // Ensure it is initialized
3587 ik->initialize(CHECK_NH);
3588 return ik->allocate_instance_handle(THREAD);
3589 }
3590
3591 oop java_lang_reflect_Parameter::name(oop param) {
3592 return param->obj_field(_name_offset);
3593 }
3594
3595 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3596 param->obj_field_put(_name_offset, value);
3597 }
3598
3599 int java_lang_reflect_Parameter::modifiers(oop param) {
3600 return param->int_field(_modifiers_offset);
3601 }
3602
3603 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3604 param->int_field_put(_modifiers_offset, value);
3605 }
3606
3607 int java_lang_reflect_Parameter::index(oop param) {
3608 return param->int_field(_index_offset);
3609 }
3610
3611 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3612 param->int_field_put(_index_offset, value);
3613 }
3614
3615 oop java_lang_reflect_Parameter::executable(oop param) {
3616 return param->obj_field(_executable_offset);
3617 }
3618
3619 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3620 param->obj_field_put(_executable_offset, value);
3621 }
3622
3623 // java_lang_Module
3624
3625 int java_lang_Module::_loader_offset;
3626 int java_lang_Module::_name_offset;
3627 int java_lang_Module::_module_entry_offset;
3628
3629 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3630 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3631 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3632 vmSymbols::java_lang_module_init_signature(),
3633 loader, module_name, CHECK_NH);
3634 }
3635
3636 #define MODULE_FIELDS_DO(macro) \
3637 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3638 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3639
3640 void java_lang_Module::compute_offsets() {
3641 InstanceKlass* k = vmClasses::Module_klass();
3642 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3643 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3644 }
3645
3646 #if INCLUDE_CDS
3647 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3648 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3649 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3650 }
3651 #endif
3652
3653 oop java_lang_Module::loader(oop module) {
3654 return module->obj_field(_loader_offset);
3655 }
3656
3657 void java_lang_Module::set_loader(oop module, oop value) {
3658 module->obj_field_put(_loader_offset, value);
3659 }
3660
3661 oop java_lang_Module::name(oop module) {
3662 return module->obj_field(_name_offset);
3663 }
3664
3665 void java_lang_Module::set_name(oop module, oop value) {
3666 module->obj_field_put(_name_offset, value);
3667 }
3668
3669 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3670 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3671 assert(module != nullptr, "module can't be null");
3672 assert(oopDesc::is_oop(module), "module must be oop");
3673
3674 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3675 return module_entry;
3676 }
3677
3678 ModuleEntry* java_lang_Module::module_entry(oop module) {
3679 ModuleEntry* module_entry = module_entry_raw(module);
3680 if (module_entry == nullptr) {
3681 // If the inject field containing the ModuleEntry* is null then return the
3682 // class loader's unnamed module.
3683 oop loader = java_lang_Module::loader(module);
3684 Handle h_loader = Handle(Thread::current(), loader);
3685 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3686 return loader_cld->unnamed_module();
3687 }
3688 return module_entry;
3689 }
3690
3691 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3692 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3693 assert(module != nullptr, "module can't be null");
3694 assert(oopDesc::is_oop(module), "module must be oop");
3695 module->address_field_put(_module_entry_offset, (address)module_entry);
3696 }
3697
3698 Handle reflect_ConstantPool::create(TRAPS) {
3699 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3700 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3701 // Ensure it is initialized
3702 k->initialize(CHECK_NH);
3703 return k->allocate_instance_handle(THREAD);
3704 }
3705
3706
3707 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3708 oop mirror = value->pool_holder()->java_mirror();
3709 // Save the mirror to get back the constant pool.
3710 reflect->obj_field_put(_oop_offset, mirror);
3711 }
3712
3713 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3714
3715 oop mirror = reflect->obj_field(_oop_offset);
3716 Klass* k = java_lang_Class::as_Klass(mirror);
3717 assert(k->is_instance_klass(), "Must be");
3718
3719 // Get the constant pool back from the klass. Since class redefinition
3720 // merges the new constant pool into the old, this is essentially the
3721 // same constant pool as the original. If constant pool merging is
3722 // no longer done in the future, this will have to change to save
3723 // the original.
3724 return InstanceKlass::cast(k)->constants();
3725 }
3726
3727
3728 // Support for java_lang_ref_Reference
3729
3730 bool java_lang_ref_Reference::_offsets_initialized;
3731
3732 int java_lang_ref_Reference::_referent_offset;
3733 int java_lang_ref_Reference::_queue_offset;
3734 int java_lang_ref_Reference::_next_offset;
3735 int java_lang_ref_Reference::_discovered_offset;
3736
3737 #define REFERENCE_FIELDS_DO(macro) \
3738 macro(_referent_offset, k, "referent", object_signature, false); \
3739 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3740 macro(_next_offset, k, "next", reference_signature, false); \
3741 macro(_discovered_offset, k, "discovered", reference_signature, false);
3742
3743 void java_lang_ref_Reference::compute_offsets() {
3744 if (_offsets_initialized) {
3745 return;
3746 }
3747 _offsets_initialized = true;
3748 InstanceKlass* k = vmClasses::Reference_klass();
3749 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3750 }
3751
3752 #if INCLUDE_CDS
3753 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3754 f->do_bool(&_offsets_initialized);
3755 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3756 }
3757 #endif
3758
3759 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3760 assert(obj != nullptr, "sanity");
3761 if (offset != _referent_offset) {
3762 return false;
3763 }
3764
3765 Klass* k = obj->klass();
3766 if (!k->is_instance_klass()) {
3767 return false;
3768 }
3769
3770 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3771 bool is_reference = ik->reference_type() != REF_NONE;
3772 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3773 return is_reference;
3774 }
3775
3776 int java_lang_boxing_object::_value_offset;
3777 int java_lang_boxing_object::_long_value_offset;
3778
3779 #define BOXING_FIELDS_DO(macro) \
3780 macro(_value_offset, integerKlass, "value", int_signature, false); \
3781 macro(_long_value_offset, longKlass, "value", long_signature, false);
3782
3783 void java_lang_boxing_object::compute_offsets() {
3784 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3785 InstanceKlass* longKlass = vmClasses::Long_klass();
3786 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3787 }
3788
3789 #if INCLUDE_CDS
3790 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3791 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3792 }
3793 #endif
3794
3795 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3796 Klass* k = vmClasses::box_klass(type);
3797 if (k == nullptr) return nullptr;
3798 InstanceKlass* ik = InstanceKlass::cast(k);
3799 if (!ik->is_initialized()) {
3800 ik->initialize(CHECK_NULL);
3801 }
3802 return ik->allocate_instance(THREAD);
3803 }
3804
3805
3806 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3807 oop box = initialize_and_allocate(type, CHECK_NULL);
3808 if (box == nullptr) return nullptr;
3809 switch (type) {
3810 case T_BOOLEAN:
3811 box->bool_field_put(_value_offset, value->z);
3812 break;
3813 case T_CHAR:
3814 box->char_field_put(_value_offset, value->c);
3815 break;
3816 case T_FLOAT:
3817 box->float_field_put(_value_offset, value->f);
3818 break;
3819 case T_DOUBLE:
3820 box->double_field_put(_long_value_offset, value->d);
3821 break;
3822 case T_BYTE:
3823 box->byte_field_put(_value_offset, value->b);
3824 break;
3825 case T_SHORT:
3826 box->short_field_put(_value_offset, value->s);
3827 break;
3828 case T_INT:
3829 box->int_field_put(_value_offset, value->i);
3830 break;
3831 case T_LONG:
3832 box->long_field_put(_long_value_offset, value->j);
3833 break;
3834 default:
3835 return nullptr;
3836 }
3837 return box;
3838 }
3839
3840
3841 BasicType java_lang_boxing_object::basic_type(oop box) {
3842 if (box == nullptr) return T_ILLEGAL;
3843 BasicType type = vmClasses::box_klass_type(box->klass());
3844 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3845 return T_ILLEGAL;
3846 return type;
3847 }
3848
3849
3850 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3851 BasicType type = vmClasses::box_klass_type(box->klass());
3852 switch (type) {
3853 case T_BOOLEAN:
3854 value->z = box->bool_field(_value_offset);
3855 break;
3856 case T_CHAR:
3857 value->c = box->char_field(_value_offset);
3858 break;
3859 case T_FLOAT:
3860 value->f = box->float_field(_value_offset);
3861 break;
3862 case T_DOUBLE:
3863 value->d = box->double_field(_long_value_offset);
3864 break;
3865 case T_BYTE:
3866 value->b = box->byte_field(_value_offset);
3867 break;
3868 case T_SHORT:
3869 value->s = box->short_field(_value_offset);
3870 break;
3871 case T_INT:
3872 value->i = box->int_field(_value_offset);
3873 break;
3874 case T_LONG:
3875 value->j = box->long_field(_long_value_offset);
3876 break;
3877 default:
3878 return T_ILLEGAL;
3879 } // end switch
3880 return type;
3881 }
3882
3883
3884 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3885 BasicType type = vmClasses::box_klass_type(box->klass());
3886 switch (type) {
3887 case T_BOOLEAN:
3888 box->bool_field_put(_value_offset, value->z);
3889 break;
3890 case T_CHAR:
3891 box->char_field_put(_value_offset, value->c);
3892 break;
3893 case T_FLOAT:
3894 box->float_field_put(_value_offset, value->f);
3895 break;
3896 case T_DOUBLE:
3897 box->double_field_put(_long_value_offset, value->d);
3898 break;
3899 case T_BYTE:
3900 box->byte_field_put(_value_offset, value->b);
3901 break;
3902 case T_SHORT:
3903 box->short_field_put(_value_offset, value->s);
3904 break;
3905 case T_INT:
3906 box->int_field_put(_value_offset, value->i);
3907 break;
3908 case T_LONG:
3909 box->long_field_put(_long_value_offset, value->j);
3910 break;
3911 default:
3912 return T_ILLEGAL;
3913 } // end switch
3914 return type;
3915 }
3916
3917
3918 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3919 switch (type) {
3920 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3921 case T_CHAR: st->print("%d", value->c); break;
3922 case T_BYTE: st->print("%d", value->b); break;
3923 case T_SHORT: st->print("%d", value->s); break;
3924 case T_INT: st->print("%d", value->i); break;
3925 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3926 case T_FLOAT: st->print("%f", value->f); break;
3927 case T_DOUBLE: st->print("%lf", value->d); break;
3928 default: st->print("type %d?", type); break;
3929 }
3930 }
3931
3932
3933 // Support for java_lang_ref_SoftReference
3934 //
3935
3936 int java_lang_ref_SoftReference::_timestamp_offset;
3937 int java_lang_ref_SoftReference::_static_clock_offset;
3938
3939 #define SOFTREFERENCE_FIELDS_DO(macro) \
3940 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
3941 macro(_static_clock_offset, k, "clock", long_signature, true)
3942
3943 void java_lang_ref_SoftReference::compute_offsets() {
3944 InstanceKlass* k = vmClasses::SoftReference_klass();
3945 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3946 }
3947
3948 #if INCLUDE_CDS
3949 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3950 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3951 }
3952 #endif
3953
3954 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3955 return ref->long_field(_timestamp_offset);
3956 }
3957
3958 jlong java_lang_ref_SoftReference::clock() {
3959 InstanceKlass* ik = vmClasses::SoftReference_klass();
3960 oop base = ik->static_field_base_raw();
3961 return base->long_field(_static_clock_offset);
3962 }
3963
3964 void java_lang_ref_SoftReference::set_clock(jlong value) {
3965 InstanceKlass* ik = vmClasses::SoftReference_klass();
3966 oop base = ik->static_field_base_raw();
3967 base->long_field_put(_static_clock_offset, value);
3968 }
3969
3970 // Support for java_lang_invoke_DirectMethodHandle
3971
3972 int java_lang_invoke_DirectMethodHandle::_member_offset;
3973
3974 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3975 oop member_name = nullptr;
3976 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3977 "a DirectMethodHandle oop is expected");
3978 return dmh->obj_field(_member_offset);
3979 }
3980
3981 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3982 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3983
3984 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3985 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
3986 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3987 }
3988
3989 #if INCLUDE_CDS
3990 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3991 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3992 }
3993 #endif
3994
3995 // Support for java_lang_invoke_MethodHandle
3996
3997 int java_lang_invoke_MethodHandle::_type_offset;
3998 int java_lang_invoke_MethodHandle::_form_offset;
3999
4000 int java_lang_invoke_MemberName::_clazz_offset;
4001 int java_lang_invoke_MemberName::_name_offset;
4002 int java_lang_invoke_MemberName::_type_offset;
4003 int java_lang_invoke_MemberName::_flags_offset;
4004 int java_lang_invoke_MemberName::_method_offset;
4005 int java_lang_invoke_MemberName::_vmindex_offset;
4006
4007 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4008 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4009
4010 int java_lang_invoke_LambdaForm::_vmentry_offset;
4011
4012 #define METHODHANDLE_FIELDS_DO(macro) \
4013 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4014 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4015
4016 void java_lang_invoke_MethodHandle::compute_offsets() {
4017 InstanceKlass* k = vmClasses::MethodHandle_klass();
4018 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4019 }
4020
4021 #if INCLUDE_CDS
4022 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4023 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4024 }
4025 #endif
4026
4027 #define MEMBERNAME_FIELDS_DO(macro) \
4028 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4029 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4030 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4031 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4032 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4033
4034 void java_lang_invoke_MemberName::compute_offsets() {
4035 InstanceKlass* k = vmClasses::MemberName_klass();
4036 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4037 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4038 }
4039
4040 #if INCLUDE_CDS
4041 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4042 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4043 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4044 }
4045 #endif
4046
4047 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4048 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4049
4050 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4051 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4052 assert(k != nullptr, "jdk mismatch");
4053 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4054 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4055 }
4056
4057 #if INCLUDE_CDS
4058 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4059 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4060 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4061 }
4062 #endif
4063
4064 #define LAMBDAFORM_FIELDS_DO(macro) \
4065 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4066
4067 void java_lang_invoke_LambdaForm::compute_offsets() {
4068 InstanceKlass* k = vmClasses::LambdaForm_klass();
4069 assert (k != nullptr, "jdk mismatch");
4070 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4071 }
4072
4073 #if INCLUDE_CDS
4074 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4075 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4076 }
4077 #endif
4078
4079 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4080 return obj != nullptr && is_subclass(obj->klass());
4081 }
4082
4083 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4084 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4085
4086 #define NEP_FIELDS_DO(macro) \
4087 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4088 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4089
4090 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4091 return obj != nullptr && is_subclass(obj->klass());
4092 }
4093
4094 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4095 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4096 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4097 }
4098
4099 #if INCLUDE_CDS
4100 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4101 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4102 }
4103 #endif
4104
4105 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4106 return entry->obj_field(_method_type_offset);
4107 }
4108
4109 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4110 return entry->long_field(_downcall_stub_address_offset);
4111 }
4112
4113 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4114 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4115 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4116 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4117 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4118 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4119 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4120
4121 #define ABIDescriptor_FIELDS_DO(macro) \
4122 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4123 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4124 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4125 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4126 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4127 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4128 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4129
4130 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4131 return obj != nullptr && is_subclass(obj->klass());
4132 }
4133
4134 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4135 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4136 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4137 }
4138
4139 #if INCLUDE_CDS
4140 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4141 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4142 }
4143 #endif
4144
4145 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4146 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4147 }
4148
4149 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4150 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4151 }
4152
4153 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4154 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4155 }
4156
4157 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4158 return entry->int_field(_stackAlignment_offset);
4159 }
4160
4161 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4162 return entry->int_field(_shadowSpace_offset);
4163 }
4164
4165 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4166 return entry->obj_field(_scratch1_offset);
4167 }
4168
4169 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4170 return entry->obj_field(_scratch2_offset);
4171 }
4172
4173 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4174 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4175 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4176 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4177
4178 #define VMStorage_FIELDS_DO(macro) \
4179 macro(_type_offset, k, "type", byte_signature, false); \
4180 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4181 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4182 macro(_debugName_offset, k, "debugName", string_signature, false); \
4183
4184 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4185 return obj != nullptr && is_subclass(obj->klass());
4186 }
4187
4188 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4189 InstanceKlass* k = vmClasses::VMStorage_klass();
4190 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4191 }
4192
4193 #if INCLUDE_CDS
4194 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4195 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4196 }
4197 #endif
4198
4199 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4200 return entry->byte_field(_type_offset);
4201 }
4202
4203 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4204 return entry->int_field(_indexOrOffset_offset);
4205 }
4206
4207 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4208 return entry->short_field(_segmentMaskOrSize_offset);
4209 }
4210
4211 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4212 return entry->obj_field(_debugName_offset);
4213 }
4214
4215 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4216 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4217
4218 #define CallConv_FIELDS_DO(macro) \
4219 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4220 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4221
4222 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4223 return obj != nullptr && is_subclass(obj->klass());
4224 }
4225
4226 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4227 InstanceKlass* k = vmClasses::CallConv_klass();
4228 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4229 }
4230
4231 #if INCLUDE_CDS
4232 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4233 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4234 }
4235 #endif
4236
4237 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4238 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4239 }
4240
4241 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4242 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4243 }
4244
4245 oop java_lang_invoke_MethodHandle::type(oop mh) {
4246 return mh->obj_field(_type_offset);
4247 }
4248
4249 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4250 mh->obj_field_put(_type_offset, mtype);
4251 }
4252
4253 oop java_lang_invoke_MethodHandle::form(oop mh) {
4254 assert(_form_offset != 0, "");
4255 return mh->obj_field(_form_offset);
4256 }
4257
4258 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4259 assert(_form_offset != 0, "");
4260 mh->obj_field_put(_form_offset, lform);
4261 }
4262
4263 /// MemberName accessors
4264
4265 oop java_lang_invoke_MemberName::clazz(oop mname) {
4266 assert(is_instance(mname), "wrong type");
4267 return mname->obj_field(_clazz_offset);
4268 }
4269
4270 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4271 assert(is_instance(mname), "wrong type");
4272 mname->obj_field_put(_clazz_offset, clazz);
4273 }
4274
4275 oop java_lang_invoke_MemberName::name(oop mname) {
4276 assert(is_instance(mname), "wrong type");
4277 return mname->obj_field(_name_offset);
4278 }
4279
4280 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4281 assert(is_instance(mname), "wrong type");
4282 mname->obj_field_put(_name_offset, name);
4283 }
4284
4285 oop java_lang_invoke_MemberName::type(oop mname) {
4286 assert(is_instance(mname), "wrong type");
4287 return mname->obj_field(_type_offset);
4288 }
4289
4290 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4291 assert(is_instance(mname), "wrong type");
4292 mname->obj_field_put(_type_offset, type);
4293 }
4294
4295 int java_lang_invoke_MemberName::flags(oop mname) {
4296 assert(is_instance(mname), "wrong type");
4297 return mname->int_field(_flags_offset);
4298 }
4299
4300 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4301 assert(is_instance(mname), "wrong type");
4302 mname->int_field_put(_flags_offset, flags);
4303 }
4304
4305
4306 // Return vmtarget from ResolvedMethodName method field through indirection
4307 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4308 assert(is_instance(mname), "wrong type");
4309 oop method = mname->obj_field(_method_offset);
4310 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4311 }
4312
4313 bool java_lang_invoke_MemberName::is_method(oop mname) {
4314 assert(is_instance(mname), "must be MemberName");
4315 return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0;
4316 }
4317
4318 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4319 assert(is_instance(mname), "wrong type");
4320 mname->obj_field_put(_method_offset, resolved_method);
4321 }
4322
4323 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4324 assert(is_instance(mname), "wrong type");
4325 return (intptr_t) mname->address_field(_vmindex_offset);
4326 }
4327
4328 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4329 assert(is_instance(mname), "wrong type");
4330 mname->address_field_put(_vmindex_offset, (address) index);
4331 }
4332
4333
4334 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4335 assert(is_instance(resolved_method), "wrong type");
4336 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4337 assert(m->is_method(), "must be");
4338 return m;
4339 }
4340
4341 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4342 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4343 assert(is_instance(resolved_method), "wrong type");
4344 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4345 }
4346
4347 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4348 assert(is_instance(resolved_method), "wrong type");
4349 resolved_method->obj_field_put(_vmholder_offset, holder);
4350 }
4351
4352 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4353 const Method* method = m();
4354
4355 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4356 oop resolved_method = ResolvedMethodTable::find_method(method);
4357 if (resolved_method != nullptr) {
4358 return resolved_method;
4359 }
4360
4361 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4362 if (!k->is_initialized()) {
4363 k->initialize(CHECK_NULL);
4364 }
4365
4366 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4367
4368 NoSafepointVerifier nsv;
4369
4370 if (method->is_old()) {
4371 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4372 method->get_new_method();
4373 }
4374
4375 InstanceKlass* holder = method->method_holder();
4376
4377 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4378 // Add a reference to the loader (actually mirror because hidden classes may not have
4379 // distinct loaders) to ensure the metadata is kept alive.
4380 // This mirror may be different than the one in clazz field.
4381 set_vmholder(new_resolved_method, holder->java_mirror());
4382
4383 // Set flag in class to indicate this InstanceKlass has entries in the table
4384 // to avoid walking table during redefinition if none of the redefined classes
4385 // have any membernames in the table.
4386 holder->set_has_resolved_methods();
4387
4388 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4389 }
4390
4391 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4392 assert(is_instance(lform), "wrong type");
4393 return lform->obj_field(_vmentry_offset);
4394 }
4395
4396
4397 // Support for java_lang_invoke_MethodType
4398
4399 int java_lang_invoke_MethodType::_rtype_offset;
4400 int java_lang_invoke_MethodType::_ptypes_offset;
4401
4402 #define METHODTYPE_FIELDS_DO(macro) \
4403 macro(_rtype_offset, k, "rtype", class_signature, false); \
4404 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4405
4406 void java_lang_invoke_MethodType::compute_offsets() {
4407 InstanceKlass* k = vmClasses::MethodType_klass();
4408 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4409 }
4410
4411 #if INCLUDE_CDS
4412 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4413 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4414 }
4415 #endif
4416
4417 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4418 st->print("(");
4419 objArrayOop pts = ptypes(mt);
4420 if (pts != nullptr) {
4421 for (int i = 0, limit = pts->length(); i < limit; i++) {
4422 java_lang_Class::print_signature(pts->obj_at(i), st);
4423 }
4424 } else {
4425 st->print("null");
4426 }
4427 st->print(")");
4428 oop rt = rtype(mt);
4429 if (rt != nullptr) {
4430 java_lang_Class::print_signature(rt, st);
4431 } else {
4432 st->print("null");
4433 }
4434 }
4435
4436 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4437 ResourceMark rm;
4438 stringStream buffer(128);
4439 print_signature(mt, &buffer);
4440 const char* sigstr = buffer.base();
4441 int siglen = (int) buffer.size();
4442 Symbol *name;
4443 if (!intern_if_not_found) {
4444 name = SymbolTable::probe(sigstr, siglen);
4445 } else {
4446 name = SymbolTable::new_symbol(sigstr, siglen);
4447 }
4448 return name;
4449 }
4450
4451 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4452 if (mt1 == mt2)
4453 return true;
4454 if (rtype(mt1) != rtype(mt2))
4455 return false;
4456 if (ptype_count(mt1) != ptype_count(mt2))
4457 return false;
4458 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4459 if (ptype(mt1, i) != ptype(mt2, i))
4460 return false;
4461 }
4462 return true;
4463 }
4464
4465 oop java_lang_invoke_MethodType::rtype(oop mt) {
4466 assert(is_instance(mt), "must be a MethodType");
4467 return mt->obj_field(_rtype_offset);
4468 }
4469
4470 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4471 assert(is_instance(mt), "must be a MethodType");
4472 return (objArrayOop) mt->obj_field(_ptypes_offset);
4473 }
4474
4475 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4476 return ptypes(mt)->obj_at(idx);
4477 }
4478
4479 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4480 return ptypes(mt)->length();
4481 }
4482
4483 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4484 objArrayOop pts = ptypes(mt);
4485 int count = pts->length();
4486 int slots = 0;
4487 for (int i = 0; i < count; i++) {
4488 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4489 slots += type2size[bt];
4490 }
4491 return slots;
4492 }
4493
4494 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4495 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4496 return type2size[bt];
4497 }
4498
4499
4500 // Support for java_lang_invoke_CallSite
4501
4502 int java_lang_invoke_CallSite::_target_offset;
4503 int java_lang_invoke_CallSite::_context_offset;
4504
4505 #define CALLSITE_FIELDS_DO(macro) \
4506 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4507 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4508
4509 void java_lang_invoke_CallSite::compute_offsets() {
4510 InstanceKlass* k = vmClasses::CallSite_klass();
4511 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4512 }
4513
4514 #if INCLUDE_CDS
4515 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4516 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4517 }
4518 #endif
4519
4520 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4521 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4522
4523 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4524 return dep_oop;
4525 }
4526
4527 // Support for java_lang_invoke_ConstantCallSite
4528
4529 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4530
4531 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4532 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4533
4534 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4535 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4536 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4537 }
4538
4539 #if INCLUDE_CDS
4540 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4541 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4542 }
4543 #endif
4544
4545 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4546
4547 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4548 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4549
4550 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4551 InstanceKlass* k = vmClasses::Context_klass();
4552 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4553 }
4554
4555 #if INCLUDE_CDS
4556 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4557 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4558 }
4559 #endif
4560
4561 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4562 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4563 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4564 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4565 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4566 return dep_ctx;
4567 }
4568
4569 // Support for java_security_AccessControlContext
4570
4571 int java_security_AccessControlContext::_context_offset;
4572 int java_security_AccessControlContext::_privilegedContext_offset;
4573 int java_security_AccessControlContext::_isPrivileged_offset;
4574 int java_security_AccessControlContext::_isAuthorized_offset;
4575
4576 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4577 macro(_context_offset, k, "context", protectiondomain_signature, false); \
4578 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4579 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
4580 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
4581
4582 void java_security_AccessControlContext::compute_offsets() {
4583 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4584 InstanceKlass* k = vmClasses::AccessControlContext_klass();
4585 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4586 }
4587
4588 #if INCLUDE_CDS
4589 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4590 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4591 }
4592 #endif
4593
4594 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4595 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4596 assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4597 // Ensure klass is initialized
4598 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4599 // Allocate result
4600 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4601 // Fill in values
4602 result->obj_field_put(_context_offset, context());
4603 result->obj_field_put(_privilegedContext_offset, privileged_context());
4604 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4605 result->bool_field_put(_isAuthorized_offset, true);
4606 return result;
4607 }
4608
4609
4610 // Support for java_lang_ClassLoader
4611
4612 int java_lang_ClassLoader::_loader_data_offset;
4613 int java_lang_ClassLoader::_parallelCapable_offset;
4614 int java_lang_ClassLoader::_name_offset;
4615 int java_lang_ClassLoader::_nameAndId_offset;
4616 int java_lang_ClassLoader::_unnamedModule_offset;
4617 int java_lang_ClassLoader::_parent_offset;
4618
4619 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4620 assert(loader != nullptr, "loader must not be null");
4621 assert(oopDesc::is_oop(loader), "loader must be oop");
4622 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4623 }
4624
4625 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4626 assert(loader != nullptr, "loader must not be null");
4627 assert(oopDesc::is_oop(loader), "loader must be oop");
4628 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4629 }
4630
4631 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4632 assert(loader != nullptr, "loader must not be null");
4633 assert(oopDesc::is_oop(loader), "loader must be oop");
4634 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4635 }
4636
4637 #define CLASSLOADER_FIELDS_DO(macro) \
4638 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4639 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4640 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4641 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4642 macro(_parent_offset, k1, "parent", classloader_signature, false)
4643
4644 void java_lang_ClassLoader::compute_offsets() {
4645 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4646 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4647
4648 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4649 }
4650
4651 #if INCLUDE_CDS
4652 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4653 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4654 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4655 }
4656 #endif
4657
4658 oop java_lang_ClassLoader::parent(oop loader) {
4659 assert(is_instance(loader), "loader must be oop");
4660 return loader->obj_field(_parent_offset);
4661 }
4662
4663 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4664 assert(is_instance(loader), "loader must be oop");
4665 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4666 }
4667
4668 // Returns the name field of this class loader. If the name field has not
4669 // been set, null will be returned.
4670 oop java_lang_ClassLoader::name(oop loader) {
4671 assert(is_instance(loader), "loader must be oop");
4672 return loader->obj_field(_name_offset);
4673 }
4674
4675 // Returns the nameAndId field of this class loader. The format is
4676 // as follows:
4677 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4678 // If the defining loader has no name then <qualified-class-name> @<id>
4679 // If built-in loader, then omit '@<id>' as there is only one instance.
4680 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4681 oop java_lang_ClassLoader::nameAndId(oop loader) {
4682 assert(is_instance(loader), "loader must be oop");
4683 return loader->obj_field(_nameAndId_offset);
4684 }
4685
4686 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4687 assert(is_instance(loader), "loader must be oop");
4688 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4689 oop acl = loader;
4690 debug_only(jint loop_count = 0);
4691 // This loop taken verbatim from ClassLoader.java:
4692 do {
4693 acl = parent(acl);
4694 if (cl == acl) {
4695 return true;
4696 }
4697 assert(++loop_count > 0, "loop_count overflow");
4698 } while (acl != nullptr);
4699 return false;
4700 }
4701
4702 bool java_lang_ClassLoader::is_instance(oop obj) {
4703 return obj != nullptr && is_subclass(obj->klass());
4704 }
4705
4706
4707 // For class loader classes, parallelCapable defined
4708 // based on non-null field
4709 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4710 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4711 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4712 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4713 }
4714
4715 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4716 // Fix for 4474172; see evaluation for more details
4717 loader = non_reflection_class_loader(loader);
4718
4719 oop cl = SystemDictionary::java_system_loader();
4720 while(cl != nullptr) {
4721 if (cl == loader) return true;
4722 cl = parent(cl);
4723 }
4724 return false;
4725 }
4726
4727 // Return true if this is one of the class loaders associated with
4728 // the generated bytecodes for serialization constructor returned
4729 // by sun.reflect.ReflectionFactory::newConstructorForSerialization
4730 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4731 if (loader != nullptr) {
4732 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass();
4733 // This might be null in non-1.4 JDKs
4734 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class));
4735 }
4736 return false;
4737 }
4738
4739 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4740 // See whether this is one of the class loaders associated with
4741 // the generated bytecodes for reflection, and if so, "magically"
4742 // delegate to its parent to prevent class loading from occurring
4743 // in places where applications using reflection didn't expect it.
4744 if (is_reflection_class_loader(loader)) {
4745 return parent(loader);
4746 }
4747 return loader;
4748 }
4749
4750 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4751 assert(is_instance(loader), "loader must be oop");
4752 return loader->obj_field(_unnamedModule_offset);
4753 }
4754
4755 // Support for java_lang_System
4756 //
4757
4758 int java_lang_System::_static_in_offset;
4759 int java_lang_System::_static_out_offset;
4760 int java_lang_System::_static_err_offset;
4761 int java_lang_System::_static_security_offset;
4762 int java_lang_System::_static_allow_security_offset;
4763 int java_lang_System::_static_never_offset;
4764
4765 #define SYSTEM_FIELDS_DO(macro) \
4766 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4767 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4768 macro(_static_err_offset, k, "err", print_stream_signature, true); \
4769 macro(_static_security_offset, k, "security", security_manager_signature, true); \
4770 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4771 macro(_static_never_offset, k, "NEVER", int_signature, true)
4772
4773 void java_lang_System::compute_offsets() {
4774 InstanceKlass* k = vmClasses::System_klass();
4775 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4776 }
4777
4778 // This field tells us that a security manager can never be installed so we
4779 // can completely skip populating the ProtectionDomainCacheTable.
4780 bool java_lang_System::allow_security_manager() {
4781 static int initialized = false;
4782 static bool allowed = true; // default
4783 if (!initialized) {
4784 oop base = vmClasses::System_klass()->static_field_base_raw();
4785 int never = base->int_field(_static_never_offset);
4786 allowed = (base->int_field(_static_allow_security_offset) != never);
4787 initialized = true;
4788 }
4789 return allowed;
4790 }
4791
4792 // This field tells us that a security manager is installed.
4793 bool java_lang_System::has_security_manager() {
4794 oop base = vmClasses::System_klass()->static_field_base_raw();
4795 return base->obj_field(_static_security_offset) != nullptr;
4796 }
4797
4798 #if INCLUDE_CDS
4799 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4800 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4801 }
4802 #endif
4803
4804 // Support for jdk_internal_misc_UnsafeConstants
4805 //
4806 class UnsafeConstantsFixup : public FieldClosure {
4807 private:
4808 int _address_size;
4809 int _page_size;
4810 bool _big_endian;
4811 bool _use_unaligned_access;
4812 int _data_cache_line_flush_size;
4813 public:
4814 UnsafeConstantsFixup() {
4815 // round up values for all static final fields
4816 _address_size = sizeof(void*);
4817 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4818 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4819 _use_unaligned_access = UseUnalignedAccesses;
4820 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4821 }
4822
4823 void do_field(fieldDescriptor* fd) {
4824 oop mirror = fd->field_holder()->java_mirror();
4825 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4826 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4827 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4828 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4829 if (fd->name() == vmSymbols::address_size_name()) {
4830 mirror->int_field_put(fd->offset(), _address_size);
4831 } else if (fd->name() == vmSymbols::page_size_name()) {
4832 mirror->int_field_put(fd->offset(), _page_size);
4833 } else if (fd->name() == vmSymbols::big_endian_name()) {
4834 mirror->bool_field_put(fd->offset(), _big_endian);
4835 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4836 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4837 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4838 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4839 } else {
4840 assert(false, "unexpected UnsafeConstants field");
4841 }
4842 }
4843 };
4844
4845 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4846 UnsafeConstantsFixup fixup;
4847 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4848 }
4849
4850
4851 // java_lang_StackTraceElement
4852
4853 int java_lang_StackTraceElement::_methodName_offset;
4854 int java_lang_StackTraceElement::_fileName_offset;
4855 int java_lang_StackTraceElement::_lineNumber_offset;
4856 int java_lang_StackTraceElement::_moduleName_offset;
4857 int java_lang_StackTraceElement::_moduleVersion_offset;
4858 int java_lang_StackTraceElement::_classLoaderName_offset;
4859 int java_lang_StackTraceElement::_declaringClass_offset;
4860 int java_lang_StackTraceElement::_declaringClassObject_offset;
4861
4862 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4863 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4864 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4865 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4866 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4867 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4868 macro(_methodName_offset, k, "methodName", string_signature, false); \
4869 macro(_fileName_offset, k, "fileName", string_signature, false); \
4870 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4871
4872 // Support for java_lang_StackTraceElement
4873 void java_lang_StackTraceElement::compute_offsets() {
4874 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4875 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4876 }
4877
4878 #if INCLUDE_CDS
4879 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4880 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4881 }
4882 #endif
4883
4884 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4885 element->obj_field_put(_fileName_offset, value);
4886 }
4887
4888 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4889 element->obj_field_put(_declaringClass_offset, value);
4890 }
4891
4892 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4893 element->obj_field_put(_methodName_offset, value);
4894 }
4895
4896 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4897 element->int_field_put(_lineNumber_offset, value);
4898 }
4899
4900 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4901 element->obj_field_put(_moduleName_offset, value);
4902 }
4903
4904 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4905 element->obj_field_put(_moduleVersion_offset, value);
4906 }
4907
4908 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4909 element->obj_field_put(_classLoaderName_offset, value);
4910 }
4911
4912 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4913 element->obj_field_put(_declaringClassObject_offset, value);
4914 }
4915
4916
4917 // java_lang_AssertionStatusDirectives
4918
4919 int java_lang_AssertionStatusDirectives::_classes_offset;
4920 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4921 int java_lang_AssertionStatusDirectives::_packages_offset;
4922 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4923 int java_lang_AssertionStatusDirectives::_deflt_offset;
4924
4925 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4926 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4927 macro(_classes_offset, k, "classes", string_array_signature, false); \
4928 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4929 macro(_packages_offset, k, "packages", string_array_signature, false); \
4930 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4931 macro(_deflt_offset, k, "deflt", bool_signature, false)
4932
4933 void java_lang_AssertionStatusDirectives::compute_offsets() {
4934 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
4935 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4936 }
4937
4938 #if INCLUDE_CDS
4939 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4940 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4941 }
4942 #endif
4943
4944 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4945 o->obj_field_put(_classes_offset, val);
4946 }
4947
4948 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4949 o->obj_field_put(_classEnabled_offset, val);
4950 }
4951
4952 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4953 o->obj_field_put(_packages_offset, val);
4954 }
4955
4956 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4957 o->obj_field_put(_packageEnabled_offset, val);
4958 }
4959
4960 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4961 o->bool_field_put(_deflt_offset, val);
4962 }
4963
4964 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4965
4966 #define AOS_FIELDS_DO(macro) \
4967 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4968
4969 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4970 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4971 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4972 }
4973
4974 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4975 assert(_owner_offset != 0, "Must be initialized");
4976 return obj->obj_field(_owner_offset);
4977 }
4978
4979 #if INCLUDE_CDS
4980 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4981 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4982 }
4983 #endif
4984
4985 int vector_VectorPayload::_payload_offset;
4986
4987 #define VECTORPAYLOAD_FIELDS_DO(macro) \
4988 macro(_payload_offset, k, "payload", object_signature, false)
4989
4990 void vector_VectorPayload::compute_offsets() {
4991 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
4992 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4993 }
4994
4995 #if INCLUDE_CDS
4996 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
4997 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4998 }
4999 #endif
5000
5001 void vector_VectorPayload::set_payload(oop o, oop val) {
5002 o->obj_field_put(_payload_offset, val);
5003 }
5004
5005 bool vector_VectorPayload::is_instance(oop obj) {
5006 return obj != nullptr && is_subclass(obj->klass());
5007 }
5008
5009 int java_lang_Integer_IntegerCache::_static_cache_offset;
5010 int java_lang_Long_LongCache::_static_cache_offset;
5011 int java_lang_Character_CharacterCache::_static_cache_offset;
5012 int java_lang_Short_ShortCache::_static_cache_offset;
5013 int java_lang_Byte_ByteCache::_static_cache_offset;
5014
5015 #define INTEGER_CACHE_FIELDS_DO(macro) \
5016 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5017
5018 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5019 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5020 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5021 }
5022
5023 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5024 oop base = ik->static_field_base_raw();
5025 return objArrayOop(base->obj_field(_static_cache_offset));
5026 }
5027
5028 Symbol* java_lang_Integer_IntegerCache::symbol() {
5029 return vmSymbols::java_lang_Integer_IntegerCache();
5030 }
5031
5032 #if INCLUDE_CDS
5033 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5034 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5035 }
5036 #endif
5037 #undef INTEGER_CACHE_FIELDS_DO
5038
5039 jint java_lang_Integer::value(oop obj) {
5040 jvalue v;
5041 java_lang_boxing_object::get_value(obj, &v);
5042 return v.i;
5043 }
5044
5045 #define LONG_CACHE_FIELDS_DO(macro) \
5046 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5047
5048 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5049 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5050 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5051 }
5052
5053 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5054 oop base = ik->static_field_base_raw();
5055 return objArrayOop(base->obj_field(_static_cache_offset));
5056 }
5057
5058 Symbol* java_lang_Long_LongCache::symbol() {
5059 return vmSymbols::java_lang_Long_LongCache();
5060 }
5061
5062 #if INCLUDE_CDS
5063 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5064 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5065 }
5066 #endif
5067 #undef LONG_CACHE_FIELDS_DO
5068
5069 jlong java_lang_Long::value(oop obj) {
5070 jvalue v;
5071 java_lang_boxing_object::get_value(obj, &v);
5072 return v.j;
5073 }
5074
5075 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5076 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5077
5078 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5079 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5080 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5081 }
5082
5083 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5084 oop base = ik->static_field_base_raw();
5085 return objArrayOop(base->obj_field(_static_cache_offset));
5086 }
5087
5088 Symbol* java_lang_Character_CharacterCache::symbol() {
5089 return vmSymbols::java_lang_Character_CharacterCache();
5090 }
5091
5092 #if INCLUDE_CDS
5093 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5094 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5095 }
5096 #endif
5097 #undef CHARACTER_CACHE_FIELDS_DO
5098
5099 jchar java_lang_Character::value(oop obj) {
5100 jvalue v;
5101 java_lang_boxing_object::get_value(obj, &v);
5102 return v.c;
5103 }
5104
5105 #define SHORT_CACHE_FIELDS_DO(macro) \
5106 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5107
5108 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5109 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5110 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5111 }
5112
5113 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5114 oop base = ik->static_field_base_raw();
5115 return objArrayOop(base->obj_field(_static_cache_offset));
5116 }
5117
5118 Symbol* java_lang_Short_ShortCache::symbol() {
5119 return vmSymbols::java_lang_Short_ShortCache();
5120 }
5121
5122 #if INCLUDE_CDS
5123 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5124 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5125 }
5126 #endif
5127 #undef SHORT_CACHE_FIELDS_DO
5128
5129 jshort java_lang_Short::value(oop obj) {
5130 jvalue v;
5131 java_lang_boxing_object::get_value(obj, &v);
5132 return v.s;
5133 }
5134
5135 #define BYTE_CACHE_FIELDS_DO(macro) \
5136 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5137
5138 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5139 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5140 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5141 }
5142
5143 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5144 oop base = ik->static_field_base_raw();
5145 return objArrayOop(base->obj_field(_static_cache_offset));
5146 }
5147
5148 Symbol* java_lang_Byte_ByteCache::symbol() {
5149 return vmSymbols::java_lang_Byte_ByteCache();
5150 }
5151
5152 #if INCLUDE_CDS
5153 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5154 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5155 }
5156 #endif
5157 #undef BYTE_CACHE_FIELDS_DO
5158
5159 jbyte java_lang_Byte::value(oop obj) {
5160 jvalue v;
5161 java_lang_boxing_object::get_value(obj, &v);
5162 return v.b;
5163 }
5164
5165 int java_lang_Boolean::_static_TRUE_offset;
5166 int java_lang_Boolean::_static_FALSE_offset;
5167
5168 #define BOOLEAN_FIELDS_DO(macro) \
5169 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5170 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5171
5172
5173 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5174 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5175 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5176 }
5177
5178 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5179 oop base = ik->static_field_base_raw();
5180 return base->obj_field(_static_TRUE_offset);
5181 }
5182
5183 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5184 oop base = ik->static_field_base_raw();
5185 return base->obj_field(_static_FALSE_offset);
5186 }
5187
5188 Symbol* java_lang_Boolean::symbol() {
5189 return vmSymbols::java_lang_Boolean();
5190 }
5191
5192 #if INCLUDE_CDS
5193 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5194 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5195 }
5196 #endif
5197 #undef BOOLEAN_CACHE_FIELDS_DO
5198
5199 jboolean java_lang_Boolean::value(oop obj) {
5200 jvalue v;
5201 java_lang_boxing_object::get_value(obj, &v);
5202 return v.z;
5203 }
5204
5205 // java_lang_reflect_RecordComponent
5206
5207 int java_lang_reflect_RecordComponent::_clazz_offset;
5208 int java_lang_reflect_RecordComponent::_name_offset;
5209 int java_lang_reflect_RecordComponent::_type_offset;
5210 int java_lang_reflect_RecordComponent::_accessor_offset;
5211 int java_lang_reflect_RecordComponent::_signature_offset;
5212 int java_lang_reflect_RecordComponent::_annotations_offset;
5213 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5214
5215 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5216 macro(_clazz_offset, k, "clazz", class_signature, false); \
5217 macro(_name_offset, k, "name", string_signature, false); \
5218 macro(_type_offset, k, "type", class_signature, false); \
5219 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5220 macro(_signature_offset, k, "signature", string_signature, false); \
5221 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5222 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5223
5224 // Support for java_lang_reflect_RecordComponent
5225 void java_lang_reflect_RecordComponent::compute_offsets() {
5226 InstanceKlass* k = vmClasses::RecordComponent_klass();
5227 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5228 }
5229
5230 #if INCLUDE_CDS
5231 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5232 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5233 }
5234 #endif
5235
5236 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5237 element->obj_field_put(_clazz_offset, value);
5238 }
5239
5240 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5241 element->obj_field_put(_name_offset, value);
5242 }
5243
5244 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5245 element->obj_field_put(_type_offset, value);
5246 }
5247
5248 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5249 element->obj_field_put(_accessor_offset, value);
5250 }
5251
5252 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5253 element->obj_field_put(_signature_offset, value);
5254 }
5255
5256 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5257 element->obj_field_put(_annotations_offset, value);
5258 }
5259
5260 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5261 element->obj_field_put(_typeAnnotations_offset, value);
5262 }
5263
5264 // java_lang_InternalError
5265 int java_lang_InternalError::_during_unsafe_access_offset;
5266
5267 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5268 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5269 }
5270
5271 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5272 return internal_error->bool_field(_during_unsafe_access_offset);
5273 }
5274
5275 void java_lang_InternalError::compute_offsets() {
5276 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5277 }
5278
5279 #if INCLUDE_CDS
5280 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5281 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5282 }
5283 #endif
5284
5285 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5286 f(java_lang_Class) \
5287 f(java_lang_String) \
5288 f(java_lang_ref_Reference) \
5289 //end
5290
5291 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5292 f(java_lang_System) \
5293 f(java_lang_ClassLoader) \
5294 f(java_lang_Throwable) \
5295 f(java_lang_Thread) \
5296 f(java_lang_Thread_FieldHolder) \
5297 f(java_lang_Thread_Constants) \
5298 f(java_lang_ThreadGroup) \
5299 f(java_lang_VirtualThread) \
5300 f(java_lang_InternalError) \
5301 f(java_lang_AssertionStatusDirectives) \
5302 f(java_lang_ref_SoftReference) \
5303 f(java_lang_invoke_MethodHandle) \
5304 f(java_lang_invoke_DirectMethodHandle) \
5305 f(java_lang_invoke_MemberName) \
5306 f(java_lang_invoke_ResolvedMethodName) \
5307 f(java_lang_invoke_LambdaForm) \
5308 f(java_lang_invoke_MethodType) \
5309 f(java_lang_invoke_CallSite) \
5310 f(java_lang_invoke_ConstantCallSite) \
5311 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5312 f(java_security_AccessControlContext) \
5313 f(java_lang_reflect_AccessibleObject) \
5314 f(java_lang_reflect_Method) \
5315 f(java_lang_reflect_Constructor) \
5316 f(java_lang_reflect_Field) \
5317 f(java_lang_reflect_RecordComponent) \
5318 f(reflect_ConstantPool) \
5319 f(java_lang_reflect_Parameter) \
5320 f(java_lang_Module) \
5321 f(java_lang_StackTraceElement) \
5322 f(java_lang_ClassFrameInfo) \
5323 f(java_lang_StackFrameInfo) \
5324 f(java_lang_LiveStackFrameInfo) \
5325 f(jdk_internal_vm_ContinuationScope) \
5326 f(jdk_internal_vm_Continuation) \
5327 f(jdk_internal_vm_StackChunk) \
5328 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5329 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5330 f(jdk_internal_foreign_abi_ABIDescriptor) \
5331 f(jdk_internal_foreign_abi_VMStorage) \
5332 f(jdk_internal_foreign_abi_CallConv) \
5333 f(jdk_internal_misc_UnsafeConstants) \
5334 f(java_lang_boxing_object) \
5335 f(vector_VectorPayload) \
5336 //end
5337
5338 #define BASIC_JAVA_CLASSES_DO(f) \
5339 BASIC_JAVA_CLASSES_DO_PART1(f) \
5340 BASIC_JAVA_CLASSES_DO_PART2(f)
5341
5342 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5343
5344 // Compute field offsets of all the classes in this file
5345 void JavaClasses::compute_offsets() {
5346 if (UseSharedSpaces) {
5347 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5348 JvmtiExport::has_early_class_hook_env()),
5349 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5350 // None of the classes used by the rest of this function can be replaced by
5351 // JVMTI ClassFileLoadHook.
5352 // We are safe to use the archived offsets, which have already been restored
5353 // by JavaClasses::serialize_offsets, without computing the offsets again.
5354 return;
5355 }
5356
5357 // We have already called the compute_offsets() of the
5358 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5359 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5360 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5361 }
5362
5363 #if INCLUDE_CDS
5364 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5365
5366 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5367 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5368 }
5369 #endif
5370
5371 #if INCLUDE_CDS_JAVA_HEAP
5372 bool JavaClasses::is_supported_for_archiving(oop obj) {
5373 Klass* klass = obj->klass();
5374
5375 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed.
5376 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5377 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5378 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5379 // So for now we cannot not support these classes for archiving.
5380 //
5381 // These objects typically are not referenced by static fields, but rather by resolved
5382 // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5383 klass == vmClasses::ResolvedMethodName_klass() ||
5384 klass == vmClasses::MemberName_klass() ||
5385 klass == vmClasses::Context_klass() ||
5386 // It's problematic to archive Reference objects. One of the reasons is that
5387 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5388 klass->is_subclass_of(vmClasses::Reference_klass())) {
5389 return false;
5390 }
5391
5392 return true;
5393 }
5394 #endif
5395
5396 #ifndef PRODUCT
5397
5398 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5399
5400 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5401 const char* field_sig) {
5402 EXCEPTION_MARK;
5403 fieldDescriptor fd;
5404 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5405 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5406 InstanceKlass* ik = InstanceKlass::cast(k);
5407 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5408 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5409 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5410 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5411 return false;
5412 }
5413 if (fd.is_static()) {
5414 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5415 return false;
5416 }
5417 if (fd.offset() == deserialized_offset ) {
5418 return true;
5419 } else {
5420 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5421 klass_name, field_name, deserialized_offset, fd.offset());
5422 return false;
5423 }
5424 }
5425
5426 void JavaClasses::check_offsets() {
5427 bool valid = true;
5428
5429 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5430 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5431
5432 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5433 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5434
5435 // Boxed primitive objects (java_lang_boxing_object)
5436
5437 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5438 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5439 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5440 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5441 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5442 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5443 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5444 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5445
5446 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5447 }
5448
5449 #endif // PRODUCT
5450
5451 int InjectedField::compute_offset() {
5452 InstanceKlass* ik = InstanceKlass::cast(klass());
5453 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5454 if (!may_be_java && !fs.field_flags().is_injected()) {
5455 // Only look at injected fields
5456 continue;
5457 }
5458 if (fs.name() == name() && fs.signature() == signature()) {
5459 return fs.offset();
5460 }
5461 }
5462 ResourceMark rm;
5463 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)" : "");
5464 #ifndef PRODUCT
5465 ik->print();
5466 tty->print_cr("all fields:");
5467 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5468 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5469 }
5470 #endif //PRODUCT
5471 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5472 return -1;
5473 }
5474
5475 void javaClasses_init() {
5476 JavaClasses::compute_offsets();
5477 JavaClasses::check_offsets();
5478 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5479 }