1 /*
2 * Copyright (c) 1997, 2023, 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/heapShared.hpp"
29 #include "cds/metaspaceShared.hpp"
30 #include "classfile/altHashing.hpp"
31 #include "classfile/classLoaderData.inline.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/javaClassesImpl.hpp"
34 #include "classfile/javaThreadStatus.hpp"
35 #include "classfile/moduleEntry.hpp"
36 #include "classfile/stringTable.hpp"
37 #include "classfile/symbolTable.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/vmClasses.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "code/debugInfo.hpp"
42 #include "code/dependencyContext.hpp"
43 #include "code/pcDesc.hpp"
44 #include "gc/shared/collectedHeap.inline.hpp"
45 #include "interpreter/interpreter.hpp"
46 #include "interpreter/linkResolver.hpp"
47 #include "jvm.h"
48 #include "logging/log.hpp"
49 #include "logging/logStream.hpp"
50 #include "memory/oopFactory.hpp"
51 #include "memory/resourceArea.hpp"
52 #include "memory/universe.hpp"
53 #include "oops/fieldInfo.hpp"
54 #include "oops/fieldStreams.inline.hpp"
55 #include "oops/flatArrayKlass.hpp"
56 #include "oops/inlineKlass.inline.hpp"
57 #include "oops/instanceKlass.inline.hpp"
58 #include "oops/instanceMirrorKlass.inline.hpp"
59 #include "oops/klass.hpp"
60 #include "oops/klass.inline.hpp"
61 #include "oops/method.inline.hpp"
62 #include "oops/objArrayKlass.hpp"
63 #include "oops/objArrayOop.inline.hpp"
64 #include "oops/oopCast.inline.hpp"
65 #include "oops/oop.inline.hpp"
66 #include "oops/symbol.hpp"
67 #include "oops/recordComponent.hpp"
68 #include "oops/typeArrayOop.inline.hpp"
69 #include "prims/jvmtiExport.hpp"
70 #include "prims/methodHandles.hpp"
71 #include "prims/resolvedMethodTable.hpp"
72 #include "runtime/continuationEntry.inline.hpp"
73 #include "runtime/continuationJavaClasses.inline.hpp"
74 #include "runtime/fieldDescriptor.inline.hpp"
75 #include "runtime/frame.inline.hpp"
76 #include "runtime/handles.inline.hpp"
77 #include "runtime/handshake.hpp"
78 #include "runtime/init.hpp"
79 #include "runtime/interfaceSupport.inline.hpp"
80 #include "runtime/java.hpp"
81 #include "runtime/javaCalls.hpp"
82 #include "runtime/javaThread.hpp"
83 #include "runtime/jniHandles.inline.hpp"
84 #include "runtime/reflectionUtils.hpp"
85 #include "runtime/safepoint.hpp"
86 #include "runtime/safepointVerifiers.hpp"
87 #include "runtime/threadSMR.hpp"
88 #include "runtime/vframe.inline.hpp"
89 #include "runtime/vm_version.hpp"
90 #include "utilities/align.hpp"
91 #include "utilities/growableArray.hpp"
92 #include "utilities/preserveException.hpp"
93 #include "utilities/utf8.hpp"
94 #if INCLUDE_JVMCI
95 #include "jvmci/jvmciJavaClasses.hpp"
96 #endif
97
98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
100
101 InjectedField JavaClasses::_injected_fields[] = {
102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
103 };
104
105 // Register native methods of Object
106 void java_lang_Object::register_natives(TRAPS) {
107 InstanceKlass* obj = vmClasses::Object_klass();
108 Method::register_native(obj, vmSymbols::hashCode_name(),
109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
110 Method::register_native(obj, vmSymbols::wait_name(),
111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
112 Method::register_native(obj, vmSymbols::notify_name(),
113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
114 Method::register_native(obj, vmSymbols::notifyAll_name(),
115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
116 Method::register_native(obj, vmSymbols::clone_name(),
117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
118 }
119
120 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
121 return _injected_fields[(int)id].compute_offset();
122 }
123
124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
125 *field_count = 0;
126
127 vmSymbolID sid = vmSymbols::find_sid(class_name);
128 if (sid == vmSymbolID::NO_SID) {
129 // Only well known classes can inject fields
130 return nullptr;
131 }
132
133 int count = 0;
134 int start = -1;
135
136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
138 count++; \
139 if (start == -1) { \
140 start = (int)InjectedFieldID::klass##_##name##_enum; \
141 } \
142 }
143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
144 #undef LOOKUP_INJECTED_FIELD
145
146 if (start != -1) {
147 *field_count = count;
148 return _injected_fields + start;
149 }
150 return nullptr;
151 }
152
153
154 // Helpful routine for computing field offsets at run time rather than hardcoding them
155 // Finds local fields only, including static fields. Static field offsets are from the
156 // beginning of the mirror.
157 void JavaClasses::compute_offset(int &dest_offset,
158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
159 bool is_static) {
160 fieldDescriptor fd;
161 if (ik == nullptr) {
162 ResourceMark rm;
163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
164 vm_exit_during_initialization("Invalid layout of well-known class");
165 }
166
167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
168 ResourceMark rm;
169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
170 name_symbol->as_C_string(), signature_symbol->as_C_string());
171 #ifndef PRODUCT
172 // Prints all fields and offsets
173 Log(class) lt;
174 LogStream ls(lt.error());
175 ik->print_on(&ls);
176 #endif //PRODUCT
177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
178 }
179 dest_offset = fd.offset();
180 }
181
182 // Overloading to pass name as a string.
183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
184 const char* name_string, Symbol* signature_symbol,
185 bool is_static) {
186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
187 if (name == nullptr) {
188 ResourceMark rm;
189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
191 }
192 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
193 }
194
195 // java_lang_String
196
197 int java_lang_String::_value_offset;
198 int java_lang_String::_hash_offset;
199 int java_lang_String::_hashIsZero_offset;
200 int java_lang_String::_coder_offset;
201 int java_lang_String::_flags_offset;
202
203 bool java_lang_String::_initialized;
204
205
206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
207 uint8_t* addr = flags_addr(java_string);
208 uint8_t value = Atomic::load(addr);
209 while ((value & flag_mask) == 0) {
210 uint8_t old_value = value;
211 value |= flag_mask;
212 value = Atomic::cmpxchg(addr, old_value, value);
213 if (value == old_value) return false; // Flag bit changed from 0 to 1.
214 }
215 return true; // Flag bit is already 1.
216 }
217
218 #define STRING_FIELDS_DO(macro) \
219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
220 macro(_hash_offset, k, "hash", int_signature, false); \
221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
222 macro(_coder_offset, k, "coder", byte_signature, false);
223
224 void java_lang_String::compute_offsets() {
225 if (_initialized) {
226 return;
227 }
228
229 InstanceKlass* k = vmClasses::String_klass();
230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
232
233 _initialized = true;
234 }
235
236 #if INCLUDE_CDS
237 void java_lang_String::serialize_offsets(SerializeClosure* f) {
238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
240 f->do_bool(&_initialized);
241 }
242 #endif
243
244 class CompactStringsFixup : public FieldClosure {
245 private:
246 bool _value;
247
248 public:
249 CompactStringsFixup(bool value) : _value(value) {}
250
251 void do_field(fieldDescriptor* fd) {
252 if (fd->name() == vmSymbols::compact_strings_name()) {
253 oop mirror = fd->field_holder()->java_mirror();
254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
255 assert(mirror != nullptr, "String must have mirror already");
256 mirror->bool_field_put(fd->offset(), _value);
257 }
258 }
259 };
260
261 void java_lang_String::set_compact_strings(bool value) {
262 CompactStringsFixup fix(value);
263 vmClasses::String_klass()->do_local_static_fields(&fix);
264 }
265
266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
267 assert(_initialized, "Must be initialized");
268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
269
270 // Create the String object first, so there's a chance that the String
271 // and the char array it points to end up in the same cache line.
272 oop obj;
273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
274
275 // Create the char array. The String object must be handlized here
276 // because GC can happen as a result of the allocation attempt.
277 Handle h_obj(THREAD, obj);
278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
280
281 // Point the String at the char array
282 obj = h_obj();
283 set_value(obj, buffer);
284 // No need to zero the offset, allocation zero'ed the entire String object
285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
286 return h_obj;
287 }
288
289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
292 typeArrayOop buffer = value(h_obj());
293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
294 if (is_latin1) {
295 for (int index = 0; index < length; index++) {
296 buffer->byte_at_put(index, (jbyte)unicode[index]);
297 }
298 } else {
299 for (int index = 0; index < length; index++) {
300 buffer->char_at_put(index, unicode[index]);
301 }
302 }
303
304 #ifdef ASSERT
305 {
306 ResourceMark rm;
307 char* expected = UNICODE::as_utf8(unicode, length);
308 char* actual = as_utf8_string(h_obj());
309 if (strcmp(expected, actual) != 0) {
310 fatal("Unicode conversion failure: %s --> %s", expected, actual);
311 }
312 }
313 #endif
314
315 return h_obj;
316 }
317
318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
319 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
320 return h_obj();
321 }
322
323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
324 if (utf8_str == nullptr) {
325 return Handle();
326 }
327 bool has_multibyte, is_latin1;
328 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
329 if (!CompactStrings) {
330 has_multibyte = true;
331 is_latin1 = false;
332 }
333
334 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
335 if (length > 0) {
336 if (!has_multibyte) {
337 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
338 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
339 } else if (is_latin1) {
340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
341 } else {
342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
343 }
344 }
345
346 #ifdef ASSERT
347 // This check is too strict when the input string is not a valid UTF8.
348 // For example, it may be created with arbitrary content via jni_NewStringUTF.
349 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) {
350 ResourceMark rm;
351 const char* expected = utf8_str;
352 char* actual = as_utf8_string(h_obj());
353 if (strcmp(expected, actual) != 0) {
354 fatal("String conversion failure: %s --> %s", expected, actual);
355 }
356 }
357 #endif
358
359 return h_obj;
360 }
361
362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
363 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
364 return h_obj();
365 }
366
367 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
368 const char* utf8_str = (char*)symbol->bytes();
369 int utf8_len = symbol->utf8_length();
370
371 bool has_multibyte, is_latin1;
372 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
373 if (!CompactStrings) {
374 has_multibyte = true;
375 is_latin1 = false;
376 }
377
378 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
379 if (length > 0) {
380 if (!has_multibyte) {
381 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
382 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
383 } else if (is_latin1) {
384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
385 } else {
386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
387 }
388 }
389
390 #ifdef ASSERT
391 {
392 ResourceMark rm;
393 const char* expected = symbol->as_utf8();
394 char* actual = as_utf8_string(h_obj());
395 if (strncmp(expected, actual, utf8_len) != 0) {
396 fatal("Symbol conversion failure: %s --> %s", expected, actual);
397 }
398 }
399 #endif
400
401 return h_obj;
402 }
403
404 // Converts a C string to a Java String based on current encoding
405 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
406 assert(str != nullptr, "bad arguments");
407
408 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
409 static to_java_string_fn_t _to_java_string_fn = nullptr;
410
411 if (_to_java_string_fn == nullptr) {
412 void *lib_handle = os::native_java_library();
413 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
414 #if defined(_WIN32) && !defined(_WIN64)
415 if (_to_java_string_fn == nullptr) {
416 // On 32 bit Windows, also try __stdcall decorated name
417 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
418 }
419 #endif
420 if (_to_java_string_fn == nullptr) {
421 fatal("JNU_NewStringPlatform missing");
422 }
423 }
424
425 jstring js = nullptr;
426 {
427 JavaThread* thread = THREAD;
428 HandleMark hm(thread);
429 ThreadToNativeFromVM ttn(thread);
430 js = (_to_java_string_fn)(thread->jni_environment(), str);
431 }
432
433 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
434 JNIHandles::destroy_local(js); // destroy local JNIHandle.
435 return native_platform_string;
436 }
437
438 // Converts a Java String to a native C string that can be used for
439 // native OS calls.
440 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
441 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
442 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
443
444 if (_to_platform_string_fn == nullptr) {
445 void *lib_handle = os::native_java_library();
446 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
447 if (_to_platform_string_fn == nullptr) {
448 fatal("GetStringPlatformChars missing");
449 }
450 }
451
452 char *native_platform_string;
453 jstring js;
454 { JavaThread* thread = THREAD;
455 js = (jstring) JNIHandles::make_local(thread, java_string());
456 HandleMark hm(thread);
457 ThreadToNativeFromVM ttn(thread);
458 JNIEnv *env = thread->jni_environment();
459 bool is_copy;
460 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
461 assert(is_copy == JNI_TRUE, "is_copy value changed");
462 }
463
464 // Uses a store barrier and therefore needs to be in vm state
465 JNIHandles::destroy_local(js);
466
467 return native_platform_string;
468 }
469
470 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
471 ResourceMark rm(THREAD);
472 return create_from_str(java_name->as_klass_external_name(), THREAD);
473 }
474
475 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
476 jchar* result = as_unicode_string_or_null(java_string, length);
477 if (result == nullptr) {
478 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
479 }
480 return result;
481 }
482
483 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
484 typeArrayOop value = java_lang_String::value(java_string);
485 length = java_lang_String::length(java_string, value);
486 bool is_latin1 = java_lang_String::is_latin1(java_string);
487
488 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
489 if (result != nullptr) {
490 if (!is_latin1) {
491 for (int index = 0; index < length; index++) {
492 result[index] = value->char_at(index);
493 }
494 } else {
495 for (int index = 0; index < length; index++) {
496 result[index] = ((jchar) value->byte_at(index)) & 0xff;
497 }
498 }
499 }
500 return result;
501 }
502
503 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
504 // The hash and hashIsZero fields are subject to a benign data race,
505 // making it crucial to ensure that any observable result of the
506 // calculation in this method stays correct under any possible read of
507 // these fields. Necessary restrictions to allow this to be correct
508 // without explicit memory fences or similar concurrency primitives is
509 // that we can ever only write to one of these two fields for a given
510 // String instance, and that the computation is idempotent and derived
511 // from immutable state
512 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
513 if (java_lang_String::hash_is_set(java_string)) {
514 return java_string->int_field(_hash_offset);
515 }
516
517 typeArrayOop value = java_lang_String::value(java_string);
518 int length = java_lang_String::length(java_string, value);
519 bool is_latin1 = java_lang_String::is_latin1(java_string);
520
521 unsigned int hash = 0;
522 if (length > 0) {
523 if (is_latin1) {
524 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
525 } else {
526 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
527 }
528 }
529
530 if (update) {
531 if (hash != 0) {
532 java_string->int_field_put(_hash_offset, hash);
533 } else {
534 java_string->bool_field_put(_hashIsZero_offset, true);
535 }
536 }
537 return hash;
538 }
539
540 unsigned int java_lang_String::hash_code(oop java_string) {
541 return hash_code_impl(java_string, /*update=*/true);
542 }
543
544 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
545 return hash_code_impl(java_string, /*update=*/false);
546 }
547
548
549 char* java_lang_String::as_quoted_ascii(oop java_string) {
550 typeArrayOop value = java_lang_String::value(java_string);
551 int length = java_lang_String::length(java_string, value);
552 bool is_latin1 = java_lang_String::is_latin1(java_string);
553
554 if (length == 0) return nullptr;
555
556 char* result;
557 int result_length;
558 if (!is_latin1) {
559 jchar* base = value->char_at_addr(0);
560 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
561 result = NEW_RESOURCE_ARRAY(char, result_length);
562 UNICODE::as_quoted_ascii(base, length, result, result_length);
563 } else {
564 jbyte* base = value->byte_at_addr(0);
565 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
566 result = NEW_RESOURCE_ARRAY(char, result_length);
567 UNICODE::as_quoted_ascii(base, length, result, result_length);
568 }
569 assert(result_length >= length + 1, "must not be shorter");
570 assert(result_length == (int)strlen(result) + 1, "must match");
571 return result;
572 }
573
574 Symbol* java_lang_String::as_symbol(oop java_string) {
575 typeArrayOop value = java_lang_String::value(java_string);
576 int length = java_lang_String::length(java_string, value);
577 bool is_latin1 = java_lang_String::is_latin1(java_string);
578 if (!is_latin1) {
579 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
580 Symbol* sym = SymbolTable::new_symbol(base, length);
581 return sym;
582 } else {
583 ResourceMark rm;
584 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
585 const char* base = UNICODE::as_utf8(position, length);
586 Symbol* sym = SymbolTable::new_symbol(base, length);
587 return sym;
588 }
589 }
590
591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
592 typeArrayOop value = java_lang_String::value(java_string);
593 int length = java_lang_String::length(java_string, value);
594 bool is_latin1 = java_lang_String::is_latin1(java_string);
595 if (!is_latin1) {
596 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
597 return SymbolTable::probe_unicode(base, length);
598 } else {
599 ResourceMark rm;
600 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
601 const char* base = UNICODE::as_utf8(position, length);
602 return SymbolTable::probe(base, length);
603 }
604 }
605
606 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
607 assert(value_equals(value, java_lang_String::value(java_string)),
608 "value must be same as java_lang_String::value(java_string)");
609 int length = java_lang_String::length(java_string, value);
610 if (length == 0) {
611 return 0;
612 }
613 if (!java_lang_String::is_latin1(java_string)) {
614 return UNICODE::utf8_length(value->char_at_addr(0), length);
615 } else {
616 return UNICODE::utf8_length(value->byte_at_addr(0), length);
617 }
618 }
619
620 int java_lang_String::utf8_length(oop java_string) {
621 typeArrayOop value = java_lang_String::value(java_string);
622 return utf8_length(java_string, value);
623 }
624
625 char* java_lang_String::as_utf8_string(oop java_string) {
626 int length;
627 return as_utf8_string(java_string, length);
628 }
629
630 char* java_lang_String::as_utf8_string(oop java_string, int& length) {
631 typeArrayOop value = java_lang_String::value(java_string);
632 length = java_lang_String::length(java_string, value);
633 bool is_latin1 = java_lang_String::is_latin1(java_string);
634 if (!is_latin1) {
635 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
636 return UNICODE::as_utf8(position, length);
637 } else {
638 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
639 return UNICODE::as_utf8(position, length);
640 }
641 }
642
643 // Uses a provided buffer if it's sufficiently large, otherwise allocates
644 // a resource array to fit
645 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) {
646 typeArrayOop value = java_lang_String::value(java_string);
647 int len = java_lang_String::length(java_string, value);
648 bool is_latin1 = java_lang_String::is_latin1(java_string);
649 if (!is_latin1) {
650 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
651 utf8_len = UNICODE::utf8_length(position, len);
652 if (utf8_len >= buflen) {
653 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
654 }
655 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
656 } else {
657 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
658 utf8_len = UNICODE::utf8_length(position, len);
659 if (utf8_len >= buflen) {
660 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
661 }
662 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
663 }
664 }
665
666 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
667 assert(value_equals(value, java_lang_String::value(java_string)),
668 "value must be same as java_lang_String::value(java_string)");
669 int length = java_lang_String::length(java_string, value);
670 bool is_latin1 = java_lang_String::is_latin1(java_string);
671 if (!is_latin1) {
672 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
673 return UNICODE::as_utf8(position, length, buf, buflen);
674 } else {
675 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
676 return UNICODE::as_utf8(position, length, buf, buflen);
677 }
678 }
679
680 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
681 typeArrayOop value = java_lang_String::value(java_string);
682 return as_utf8_string(java_string, value, buf, buflen);
683 }
684
685 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
686 typeArrayOop value = java_lang_String::value(java_string);
687 bool is_latin1 = java_lang_String::is_latin1(java_string);
688 assert(start + len <= java_lang_String::length(java_string), "just checking");
689 if (!is_latin1) {
690 jchar* position = value->char_at_addr(start);
691 return UNICODE::as_utf8(position, len);
692 } else {
693 jbyte* position = value->byte_at_addr(start);
694 return UNICODE::as_utf8(position, len);
695 }
696 }
697
698 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
699 assert(value_equals(value, java_lang_String::value(java_string)),
700 "value must be same as java_lang_String::value(java_string)");
701 assert(start + len <= java_lang_String::length(java_string), "just checking");
702 bool is_latin1 = java_lang_String::is_latin1(java_string);
703 if (!is_latin1) {
704 jchar* position = value->char_at_addr(start);
705 return UNICODE::as_utf8(position, len, buf, buflen);
706 } else {
707 jbyte* position = value->byte_at_addr(start);
708 return UNICODE::as_utf8(position, len, buf, buflen);
709 }
710 }
711
712 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
713 assert(java_string->klass() == vmClasses::String_klass(),
714 "must be java_string");
715 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
716 int length = java_lang_String::length(java_string, value);
717 if (length != len) {
718 return false;
719 }
720 bool is_latin1 = java_lang_String::is_latin1(java_string);
721 if (!is_latin1) {
722 for (int i = 0; i < len; i++) {
723 if (value->char_at(i) != chars[i]) {
724 return false;
725 }
726 }
727 } else {
728 for (int i = 0; i < len; i++) {
729 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
730 return false;
731 }
732 }
733 }
734 return true;
735 }
736
737 bool java_lang_String::equals(oop str1, oop str2) {
738 assert(str1->klass() == vmClasses::String_klass(),
739 "must be java String");
740 assert(str2->klass() == vmClasses::String_klass(),
741 "must be java String");
742 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
743 bool is_latin1 = java_lang_String::is_latin1(str1);
744 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
745 bool is_latin2 = java_lang_String::is_latin1(str2);
746
747 if (is_latin1 != is_latin2) {
748 // Strings with different coders are never equal.
749 return false;
750 }
751 return value_equals(value1, value2);
752 }
753
754 void java_lang_String::print(oop java_string, outputStream* st) {
755 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
756 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
757
758 if (value == nullptr) {
759 // This can happen if, e.g., printing a String
760 // object before its initializer has been called
761 st->print("nullptr");
762 return;
763 }
764
765 int length = java_lang_String::length(java_string, value);
766 bool is_latin1 = java_lang_String::is_latin1(java_string);
767
768 st->print("\"");
769 for (int index = 0; index < length; index++) {
770 jchar c = (!is_latin1) ? value->char_at(index) :
771 ((jchar) value->byte_at(index)) & 0xff;
772 if (c < ' ') {
773 st->print("\\x%02X", c); // print control characters e.g. \x0A
774 } else {
775 st->print("%c", c);
776 }
777 }
778 st->print("\"");
779 }
780
781 // java_lang_Class
782
783 int java_lang_Class::_klass_offset;
784 int java_lang_Class::_array_klass_offset;
785 int java_lang_Class::_oop_size_offset;
786 int java_lang_Class::_static_oop_field_count_offset;
787 int java_lang_Class::_class_loader_offset;
788 int java_lang_Class::_module_offset;
789 int java_lang_Class::_protection_domain_offset;
790 int java_lang_Class::_component_mirror_offset;
791 int java_lang_Class::_primary_mirror_offset;
792 int java_lang_Class::_secondary_mirror_offset;
793 int java_lang_Class::_signers_offset;
794 int java_lang_Class::_name_offset;
795 int java_lang_Class::_source_file_offset;
796 int java_lang_Class::_classData_offset;
797 int java_lang_Class::_classRedefinedCount_offset;
798
799 bool java_lang_Class::_offsets_computed = false;
800 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
801 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
802
803 #ifdef ASSERT
804 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
805 assert(fd->has_initial_value(), "caller should have checked this");
806 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
807 // Can't use vmSymbols::string_signature() as fd->signature() may have been relocated
808 // during DumpSharedSpaces
809 assert(fd->signature()->equals("Ljava/lang/String;"), "just checking");
810 }
811 #endif
812
813 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
814 DEBUG_ONLY(assert_valid_static_string_field(fd);)
815 oop string = fd->string_initial_value(CHECK);
816 mirror()->obj_field_put(fd->offset(), string);
817 }
818
819 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
820 assert(fd->has_initial_value(), "caller should have checked this");
821 BasicType t = fd->field_type();
822 switch (t) {
823 case T_BYTE:
824 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
825 break;
826 case T_BOOLEAN:
827 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
828 break;
829 case T_CHAR:
830 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
831 break;
832 case T_SHORT:
833 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
834 break;
835 case T_INT:
836 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
837 break;
838 case T_FLOAT:
839 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
840 break;
841 case T_DOUBLE:
842 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
843 break;
844 case T_LONG:
845 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
846 break;
847 default:
848 // Illegal ConstantValue attribute in class file should have been
849 // caught during classfile parsing.
850 ShouldNotReachHere();
851 }
852 }
853
854 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
855 assert(mirror.not_null() && fd->is_static(), "just checking");
856 if (fd->has_initial_value()) {
857 if (fd->field_type() != T_OBJECT) {
858 initialize_static_primitive_field(fd, mirror);
859 } else {
860 initialize_static_string_field(fd, mirror, CHECK);
861 }
862 }
863 }
864
865 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
866 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
867
868 // If the offset was read from the shared archive, it was fixed up already
869 if (!k->is_shared()) {
870 if (k->is_instance_klass()) {
871 // During bootstrap, java.lang.Class wasn't loaded so static field
872 // offsets were computed without the size added it. Go back and
873 // update all the static field offsets to included the size.
874
875 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
876 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
877 // static fields offsets are updated in this array before reencoding everything into
878 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
879
880 int java_fields;
881 int injected_fields;
882 InstanceKlass* ik = InstanceKlass::cast(k);
883 GrowableArray<FieldInfo>* fields =
884 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
885 &java_fields, &injected_fields);
886 for (int i = 0; i < fields->length(); i++) {
887 FieldInfo* fi = fields->adr_at(i);
888 if (fi->access_flags().is_static()) {
889 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
890 }
891 }
892 Array<u1>* old_stream = ik->fieldinfo_stream();
893 assert(fields->length() == (java_fields + injected_fields), "Must be");
894 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
895 ik->set_fieldinfo_stream(new_fis);
896 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
897 }
898 }
899
900 if (k->is_shared() && k->has_archived_mirror_index()) {
901 if (ArchiveHeapLoader::is_in_use()) {
902 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
903 assert(present, "Missing archived mirror for %s", k->external_name());
904 return;
905 } else {
906 k->clear_java_mirror_handle();
907 k->clear_archived_mirror_index();
908 }
909 }
910 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
911 }
912
913 void java_lang_Class::initialize_mirror_fields(Klass* k,
914 Handle mirror,
915 Handle protection_domain,
916 Handle classData,
917 TRAPS) {
918 // Set protection domain also
919 set_protection_domain(mirror(), protection_domain());
920
921 // Initialize static fields
922 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
923
924 // Set classData
925 set_class_data(mirror(), classData());
926 }
927
928 // Set the java.lang.Module module field in the java_lang_Class mirror
929 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
930 if (module.is_null()) {
931 // During startup, the module may be null only if java.base has not been defined yet.
932 // Put the class on the fixup_module_list to patch later when the java.lang.Module
933 // for java.base is known. But note that since we captured the null module another
934 // thread may have completed that initialization.
935
936 bool javabase_was_defined = false;
937 {
938 MutexLocker m1(current, Module_lock);
939 // Keep list of classes needing java.base module fixup
940 if (!ModuleEntryTable::javabase_defined()) {
941 assert(k->java_mirror() != nullptr, "Class's mirror is null");
942 k->class_loader_data()->inc_keep_alive();
943 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
944 fixup_module_field_list()->push(k);
945 } else {
946 javabase_was_defined = true;
947 }
948 }
949
950 // If java.base was already defined then patch this particular class with java.base.
951 if (javabase_was_defined) {
952 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
953 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
954 "Setting class module field, " JAVA_BASE_NAME " should be defined");
955 Handle javabase_handle(current, javabase_entry->module());
956 set_module(mirror(), javabase_handle());
957 }
958 } else {
959 assert(Universe::is_module_initialized() ||
960 (ModuleEntryTable::javabase_defined() &&
961 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
962 "Incorrect java.lang.Module specification while creating mirror");
963 set_module(mirror(), module());
964 }
965 }
966
967 // Statically allocate fixup lists because they always get created.
968 void java_lang_Class::allocate_fixup_lists() {
969 GrowableArray<Klass*>* mirror_list =
970 new (mtClass) GrowableArray<Klass*>(40, mtClass);
971 set_fixup_mirror_list(mirror_list);
972
973 GrowableArray<Klass*>* module_list =
974 new (mtModule) GrowableArray<Klass*>(500, mtModule);
975 set_fixup_module_field_list(module_list);
976 }
977
978 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
979 Handle& mirror, Handle& comp_mirror, TRAPS) {
980 // Allocate mirror (java.lang.Class instance)
981 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
982 mirror = Handle(THREAD, mirror_oop);
983
984 // Setup indirection from mirror->klass
985 set_klass(mirror(), k);
986
987 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
988 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
989
990 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
991
992 // It might also have a component mirror. This mirror must already exist.
993 if (k->is_array_klass()) {
994 if (k->is_flatArray_klass()) {
995 Klass* element_klass = (Klass*) FlatArrayKlass::cast(k)->element_klass();
996 assert(element_klass->is_inline_klass(), "Must be inline type component");
997 if (is_scratch) {
998 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
999 } else {
1000 InlineKlass* vk = InlineKlass::cast(element_klass);
1001 comp_mirror = Handle(THREAD, vk->val_mirror());
1002 }
1003 } else if (k->is_typeArray_klass()) {
1004 BasicType type = TypeArrayKlass::cast(k)->element_type();
1005 if (is_scratch) {
1006 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1007 } else {
1008 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1009 }
1010 } else {
1011 assert(k->is_objArray_klass(), "Must be");
1012 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1013 assert(element_klass != nullptr, "Must have an element klass");
1014 oop comp_oop = element_klass->java_mirror();
1015 if (element_klass->is_inline_klass()) {
1016 InlineKlass* ik = InlineKlass::cast(element_klass);
1017 comp_oop = k->name()->is_Q_array_signature() ? ik->val_mirror() : ik->ref_mirror();
1018 }
1019 if (is_scratch) {
1020 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1021 } else {
1022 comp_mirror = Handle(THREAD, comp_oop);
1023 }
1024 }
1025 assert(comp_mirror() != nullptr, "must have a mirror");
1026
1027 // Two-way link between the array klass and its component mirror:
1028 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1029 set_component_mirror(mirror(), comp_mirror());
1030 // See below for ordering dependencies between field array_klass in component mirror
1031 // and java_mirror in this klass.
1032 } else {
1033 assert(k->is_instance_klass(), "Must be");
1034
1035 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1036 if (HAS_PENDING_EXCEPTION) {
1037 // If any of the fields throws an exception like OOM remove the klass field
1038 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1039 // This mirror looks like a primitive type, which logically it is because it
1040 // it represents no class.
1041 set_klass(mirror(), nullptr);
1042 return;
1043 }
1044 }
1045 }
1046
1047 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1048 Handle module, Handle protection_domain,
1049 Handle classData, TRAPS) {
1050 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1051 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1052
1053 // Use this moment of initialization to cache modifier_flags also,
1054 // to support Class.getModifiers(). Instance classes recalculate
1055 // the cached flags after the class file is parsed, but before the
1056 // class is put into the system dictionary.
1057 int computed_modifiers = k->compute_modifier_flags();
1058 k->set_modifier_flags(computed_modifiers);
1059 // Class_klass has to be loaded because it is used to allocate
1060 // the mirror.
1061 if (vmClasses::Class_klass_loaded()) {
1062 Handle mirror;
1063 Handle comp_mirror;
1064
1065 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1066
1067 // set the classLoader field in the java_lang_Class instance
1068 assert(class_loader() == k->class_loader(), "should be same");
1069 set_class_loader(mirror(), class_loader());
1070
1071 // Setup indirection from klass->mirror
1072 // after any exceptions can happen during allocations.
1073 k->set_java_mirror(mirror);
1074
1075 // Set the module field in the java_lang_Class instance. This must be done
1076 // after the mirror is set.
1077 set_mirror_module_field(THREAD, k, mirror, module);
1078
1079 if (comp_mirror() != nullptr) {
1080 // Set after k->java_mirror() is published, because compiled code running
1081 // concurrently doesn't expect a k to have a null java_mirror.
1082 release_set_array_klass(comp_mirror(), k);
1083 }
1084
1085 if (k->is_inline_klass()) {
1086 oop secondary_mirror = create_secondary_mirror(k, mirror, CHECK);
1087 set_primary_mirror(mirror(), mirror());
1088 set_secondary_mirror(mirror(), secondary_mirror);
1089 }
1090 if (DumpSharedSpaces) {
1091 create_scratch_mirror(k, CHECK);
1092 }
1093 } else {
1094 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1095 fixup_mirror_list()->push(k);
1096 }
1097 }
1098 // Create the secondary mirror for inline class. Sets all the fields of this java.lang.Class
1099 // instance with the same value as the primary mirror
1100 oop java_lang_Class::create_secondary_mirror(Klass* k, Handle mirror, TRAPS) {
1101 assert(k->is_inline_klass(), "primitive class");
1102 // Allocate mirror (java.lang.Class instance)
1103 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK_0);
1104 Handle secondary_mirror(THREAD, mirror_oop);
1105
1106 java_lang_Class::set_klass(secondary_mirror(), k);
1107 java_lang_Class::set_static_oop_field_count(secondary_mirror(), static_oop_field_count(mirror()));
1108
1109 set_protection_domain(secondary_mirror(), protection_domain(mirror()));
1110 set_class_loader(secondary_mirror(), class_loader(mirror()));
1111 // ## handle if java.base is not yet defined
1112 set_module(secondary_mirror(), module(mirror()));
1113 set_primary_mirror(secondary_mirror(), mirror());
1114 set_secondary_mirror(secondary_mirror(), secondary_mirror());
1115 return secondary_mirror();
1116 }
1117
1118 #if INCLUDE_CDS_JAVA_HEAP
1119 // The "scratch mirror" stores the states of the mirror object that can be
1120 // decided at dump time (such as the initial values of the static fields, the
1121 // component mirror, etc). At runtime, more information is added to it by
1122 // java_lang_Class::restore_archived_mirror().
1123 //
1124 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1125 // produces the same result as /*runtime*/create_mirror().
1126 //
1127 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1128 // latter may contain dumptime-specific information that cannot be archived
1129 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1130 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1131 if (k->class_loader() != nullptr &&
1132 k->class_loader() != SystemDictionary::java_platform_loader() &&
1133 k->class_loader() != SystemDictionary::java_system_loader()) {
1134 // We only archive the mirrors of classes loaded by the built-in loaders
1135 return;
1136 }
1137
1138 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1139 Handle mirror;
1140 Handle comp_mirror;
1141 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1142
1143 if (comp_mirror() != nullptr) {
1144 release_set_array_klass(comp_mirror(), k);
1145 }
1146
1147 HeapShared::set_scratch_java_mirror(k, mirror());
1148 }
1149
1150 // Returns true if the mirror is updated, false if no archived mirror
1151 // data is present. After the archived mirror object is restored, the
1152 // shared klass' _has_raw_archived_mirror flag is cleared.
1153 bool java_lang_Class::restore_archived_mirror(Klass *k,
1154 Handle class_loader, Handle module,
1155 Handle protection_domain, TRAPS) {
1156 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1157 // see more details in vmClasses::resolve_all().
1158 if (!vmClasses::Class_klass_loaded()) {
1159 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1160 fixup_mirror_list()->push(k);
1161 return true;
1162 }
1163
1164 oop m = k->archived_java_mirror();
1165 assert(m != nullptr, "must have stored non-null archived mirror");
1166
1167 // Sanity: clear it now to prevent re-initialization if any of the following fails
1168 k->clear_archived_mirror_index();
1169
1170 // mirror is archived, restore
1171 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1172 assert(as_Klass(m) == k, "must be");
1173 Handle mirror(THREAD, m);
1174
1175 if (!k->is_array_klass()) {
1176 // - local static final fields with initial values were initialized at dump time
1177
1178 if (protection_domain.not_null()) {
1179 set_protection_domain(mirror(), protection_domain());
1180 }
1181 }
1182
1183 assert(class_loader() == k->class_loader(), "should be same");
1184 if (class_loader.not_null()) {
1185 set_class_loader(mirror(), class_loader());
1186 }
1187
1188 k->set_java_mirror(mirror);
1189
1190 set_mirror_module_field(THREAD, k, mirror, module);
1191
1192 if (log_is_enabled(Trace, cds, heap, mirror)) {
1193 ResourceMark rm(THREAD);
1194 log_trace(cds, heap, mirror)(
1195 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1196 }
1197
1198 return true;
1199 }
1200 #endif // INCLUDE_CDS_JAVA_HEAP
1201
1202 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1203 assert(_module_offset != 0, "must have been computed already");
1204 set_module(k->java_mirror(), module());
1205 }
1206
1207 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1208 assert(_oop_size_offset != 0, "must be set");
1209 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1210 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1211 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1212 }
1213
1214 int java_lang_Class::static_oop_field_count(oop java_class) {
1215 assert(_static_oop_field_count_offset != 0, "must be set");
1216 return java_class->int_field(_static_oop_field_count_offset);
1217 }
1218
1219 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1220 assert(_static_oop_field_count_offset != 0, "must be set");
1221 java_class->int_field_put(_static_oop_field_count_offset, size);
1222 }
1223
1224 oop java_lang_Class::protection_domain(oop java_class) {
1225 assert(_protection_domain_offset != 0, "must be set");
1226 return java_class->obj_field(_protection_domain_offset);
1227 }
1228 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1229 assert(_protection_domain_offset != 0, "must be set");
1230 java_class->obj_field_put(_protection_domain_offset, pd);
1231 }
1232
1233 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1234 assert(_component_mirror_offset != 0, "must be set");
1235 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1236 }
1237 oop java_lang_Class::component_mirror(oop java_class) {
1238 assert(_component_mirror_offset != 0, "must be set");
1239 return java_class->obj_field(_component_mirror_offset);
1240 }
1241
1242 oop java_lang_Class::primary_mirror(oop java_class) {
1243 assert(_primary_mirror_offset != 0, "must be set");
1244 return java_class->obj_field(_primary_mirror_offset);
1245 }
1246
1247 void java_lang_Class::set_primary_mirror(oop java_class, oop mirror) {
1248 assert(_primary_mirror_offset != 0, "must be set");
1249 java_class->obj_field_put(_primary_mirror_offset, mirror);
1250 }
1251
1252 oop java_lang_Class::secondary_mirror(oop java_class) {
1253 assert(_secondary_mirror_offset != 0, "must be set");
1254 return java_class->obj_field(_secondary_mirror_offset);
1255 }
1256
1257 void java_lang_Class::set_secondary_mirror(oop java_class, oop mirror) {
1258 assert(_secondary_mirror_offset != 0, "must be set");
1259 java_class->obj_field_put(_secondary_mirror_offset, mirror);
1260 }
1261
1262 objArrayOop java_lang_Class::signers(oop java_class) {
1263 assert(_signers_offset != 0, "must be set");
1264 return (objArrayOop)java_class->obj_field(_signers_offset);
1265 }
1266 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1267 assert(_signers_offset != 0, "must be set");
1268 java_class->obj_field_put(_signers_offset, signers);
1269 }
1270
1271 oop java_lang_Class::class_data(oop java_class) {
1272 assert(_classData_offset != 0, "must be set");
1273 return java_class->obj_field(_classData_offset);
1274 }
1275 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1276 assert(_classData_offset != 0, "must be set");
1277 java_class->obj_field_put(_classData_offset, class_data);
1278 }
1279
1280 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1281 assert(_class_loader_offset != 0, "offsets should have been initialized");
1282 java_class->obj_field_put(_class_loader_offset, loader);
1283 }
1284
1285 oop java_lang_Class::class_loader(oop java_class) {
1286 assert(_class_loader_offset != 0, "must be set");
1287 return java_class->obj_field(_class_loader_offset);
1288 }
1289
1290 oop java_lang_Class::module(oop java_class) {
1291 assert(_module_offset != 0, "must be set");
1292 return java_class->obj_field(_module_offset);
1293 }
1294
1295 void java_lang_Class::set_module(oop java_class, oop module) {
1296 assert(_module_offset != 0, "must be set");
1297 java_class->obj_field_put(_module_offset, module);
1298 }
1299
1300 oop java_lang_Class::name(Handle java_class, TRAPS) {
1301 assert(_name_offset != 0, "must be set");
1302 oop o = java_class->obj_field(_name_offset);
1303 if (o == nullptr) {
1304 o = StringTable::intern(as_external_name(java_class()), THREAD);
1305 java_class->obj_field_put(_name_offset, o);
1306 }
1307 return o;
1308 }
1309
1310 oop java_lang_Class::source_file(oop java_class) {
1311 assert(_source_file_offset != 0, "must be set");
1312 return java_class->obj_field(_source_file_offset);
1313 }
1314
1315 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1316 assert(_source_file_offset != 0, "must be set");
1317 java_class->obj_field_put(_source_file_offset, source_file);
1318 }
1319
1320 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1321 // This should be improved by adding a field at the Java level or by
1322 // introducing a new VM klass (see comment in ClassFileParser)
1323 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1324 if (type != T_VOID) {
1325 Klass* aklass = Universe::typeArrayKlassObj(type);
1326 assert(aklass != nullptr, "correct bootstrap");
1327 release_set_array_klass(java_class, aklass);
1328 }
1329 #ifdef ASSERT
1330 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1331 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1332 #endif
1333 return java_class;
1334 }
1335
1336 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1337 assert(is_instance(java_class), "must be a Class object");
1338 java_class->metadata_field_put(_klass_offset, klass);
1339 }
1340
1341
1342 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1343 assert(is_instance(java_class), "must be a Class object");
1344 Symbol* name = nullptr;
1345 bool is_instance = false;
1346 bool is_Q_descriptor = false;
1347 if (is_primitive(java_class)) {
1348 name = vmSymbols::type_signature(primitive_type(java_class));
1349 } else {
1350 Klass* k = as_Klass(java_class);
1351 is_instance = k->is_instance_klass();
1352 is_Q_descriptor = k->is_inline_klass() && is_secondary_mirror(java_class);
1353 name = k->name();
1354 }
1355 if (name == nullptr) {
1356 st->print("<null>");
1357 return;
1358 }
1359 if (is_instance) {
1360 st->print(is_Q_descriptor ? "Q" : "L");
1361 }
1362 st->write((char*) name->base(), (int) name->utf8_length());
1363 if (is_instance) st->print(";");
1364 }
1365
1366 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1367 assert(is_instance(java_class), "must be a Class object");
1368 Symbol* name;
1369 if (is_primitive(java_class)) {
1370 name = vmSymbols::type_signature(primitive_type(java_class));
1371 // Because this can create a new symbol, the caller has to decrement
1372 // the refcount, so make adjustment here and below for symbols returned
1373 // that are not created or incremented due to a successful lookup.
1374 name->increment_refcount();
1375 } else {
1376 Klass* k = as_Klass(java_class);
1377 if (!k->is_instance_klass()) {
1378 name = k->name();
1379 name->increment_refcount();
1380 } else {
1381 ResourceMark rm;
1382 const char* sigstr;
1383 if (k->is_inline_klass() && is_secondary_mirror(java_class)) {
1384 sigstr = InlineKlass::cast(k)->val_signature_name();
1385 } else {
1386 sigstr = k->signature_name();
1387 }
1388 int siglen = (int) strlen(sigstr);
1389 if (!intern_if_not_found) {
1390 name = SymbolTable::probe(sigstr, siglen);
1391 } else {
1392 name = SymbolTable::new_symbol(sigstr, siglen);
1393 }
1394 }
1395 }
1396 return name;
1397 }
1398
1399 // Returns the Java name for this Java mirror (Resource allocated)
1400 // See Klass::external_name().
1401 // For primitive type Java mirrors, its type name is returned.
1402 const char* java_lang_Class::as_external_name(oop java_class) {
1403 assert(is_instance(java_class), "must be a Class object");
1404 const char* name = nullptr;
1405 if (is_primitive(java_class)) {
1406 name = type2name(primitive_type(java_class));
1407 } else {
1408 name = as_Klass(java_class)->external_name();
1409 }
1410 if (name == nullptr) {
1411 name = "<null>";
1412 }
1413 return name;
1414 }
1415
1416 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1417 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1418 assert(k == nullptr || k->is_klass() && k->is_array_klass(), "should be array klass");
1419 return k;
1420 }
1421
1422
1423 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1424 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1425 java_class->release_metadata_field_put(_array_klass_offset, klass);
1426 }
1427
1428
1429 BasicType java_lang_Class::primitive_type(oop java_class) {
1430 assert(is_primitive(java_class), "just checking");
1431 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1432 BasicType type = T_VOID;
1433 if (ak != nullptr) {
1434 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1435 type = ArrayKlass::cast(ak)->element_type();
1436 } else {
1437 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1438 }
1439 #ifdef ASSERT
1440 if (DumpSharedSpaces) {
1441 oop mirror = Universe::java_mirror(type);
1442 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1443 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1444 } else {
1445 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1446 }
1447 #endif
1448 return type;
1449 }
1450
1451 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1452 assert(is_instance(java_class), "must be a Class object");
1453 if (is_primitive(java_class)) {
1454 if (reference_klass != nullptr)
1455 (*reference_klass) = nullptr;
1456 return primitive_type(java_class);
1457 } else {
1458 if (reference_klass != nullptr)
1459 (*reference_klass) = as_Klass(java_class);
1460 return T_OBJECT;
1461 }
1462 }
1463
1464
1465 oop java_lang_Class::primitive_mirror(BasicType t) {
1466 oop mirror = Universe::java_mirror(t);
1467 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1468 assert(is_primitive(mirror), "must be primitive");
1469 return mirror;
1470 }
1471
1472 #define CLASS_FIELDS_DO(macro) \
1473 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1474 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1475 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1476 macro(_primary_mirror_offset, k, "primaryType", class_signature, false); \
1477 macro(_secondary_mirror_offset, k, "secondaryType", class_signature, false); \
1478 macro(_module_offset, k, "module", module_signature, false); \
1479 macro(_name_offset, k, "name", string_signature, false); \
1480 macro(_classData_offset, k, "classData", object_signature, false);
1481
1482 void java_lang_Class::compute_offsets() {
1483 if (_offsets_computed) {
1484 return;
1485 }
1486
1487 _offsets_computed = true;
1488
1489 InstanceKlass* k = vmClasses::Class_klass();
1490 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1491
1492 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1493 }
1494
1495 #if INCLUDE_CDS
1496 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1497 f->do_bool(&_offsets_computed);
1498
1499 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1500
1501 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1502 }
1503 #endif
1504
1505 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1506 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1507 return the_class_mirror->int_field(_classRedefinedCount_offset);
1508 }
1509
1510 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1511 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1512 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1513 }
1514
1515
1516 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1517 // platform thread structure, and a eetop offset which was used for thread
1518 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1519 // merged, so in the HotSpot VM we just use the eetop field for the thread
1520 // instead of the privateInfo_offset.
1521 //
1522 // Note: The stackSize field is only present starting in 1.4.
1523
1524 int java_lang_Thread_FieldHolder::_group_offset;
1525 int java_lang_Thread_FieldHolder::_priority_offset;
1526 int java_lang_Thread_FieldHolder::_stackSize_offset;
1527 int java_lang_Thread_FieldHolder::_daemon_offset;
1528 int java_lang_Thread_FieldHolder::_thread_status_offset;
1529
1530 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1531 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1532 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1533 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1534 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1535 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1536
1537 void java_lang_Thread_FieldHolder::compute_offsets() {
1538 assert(_group_offset == 0, "offsets should be initialized only once");
1539
1540 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1541 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1542 }
1543
1544 #if INCLUDE_CDS
1545 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1546 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1547 }
1548 #endif
1549
1550 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1551 return holder->obj_field(_group_offset);
1552 }
1553
1554 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1555 return (ThreadPriority)holder->int_field(_priority_offset);
1556 }
1557
1558 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1559 holder->int_field_put(_priority_offset, priority);
1560 }
1561
1562 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1563 return holder->long_field(_stackSize_offset);
1564 }
1565
1566 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1567 return holder->bool_field(_daemon_offset) != 0;
1568 }
1569
1570 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1571 assert(val, "daemon status is never turned off");
1572 holder->bool_field_put(_daemon_offset, val);
1573 }
1574
1575 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1576 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1577 }
1578
1579 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1580 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1581 }
1582
1583
1584 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1585
1586 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1587 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1588
1589 void java_lang_Thread_Constants::compute_offsets() {
1590 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1591
1592 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1593 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1594 }
1595
1596 #if INCLUDE_CDS
1597 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1598 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1599 }
1600 #endif
1601
1602 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1603 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1604 oop base = k->static_field_base_raw();
1605 return base->obj_field(_static_VTHREAD_GROUP_offset);
1606 }
1607
1608
1609 int java_lang_Thread::_holder_offset;
1610 int java_lang_Thread::_name_offset;
1611 int java_lang_Thread::_contextClassLoader_offset;
1612 int java_lang_Thread::_inheritedAccessControlContext_offset;
1613 int java_lang_Thread::_eetop_offset;
1614 int java_lang_Thread::_jvmti_thread_state_offset;
1615 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1616 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1617 int java_lang_Thread::_interrupted_offset;
1618 int java_lang_Thread::_tid_offset;
1619 int java_lang_Thread::_continuation_offset;
1620 int java_lang_Thread::_park_blocker_offset;
1621 int java_lang_Thread::_scopedValueBindings_offset;
1622 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1623
1624 #define THREAD_FIELDS_DO(macro) \
1625 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1626 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1627 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1628 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1629 macro(_eetop_offset, k, "eetop", long_signature, false); \
1630 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1631 macro(_tid_offset, k, "tid", long_signature, false); \
1632 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1633 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1634 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1635
1636 void java_lang_Thread::compute_offsets() {
1637 assert(_holder_offset == 0, "offsets should be initialized only once");
1638
1639 InstanceKlass* k = vmClasses::Thread_klass();
1640 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1641 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1642 }
1643
1644 #if INCLUDE_CDS
1645 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1646 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1647 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1648 }
1649 #endif
1650
1651 JavaThread* java_lang_Thread::thread(oop java_thread) {
1652 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1653 }
1654
1655 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1656 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1657 }
1658
1659 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1660 java_thread->address_field_put(_eetop_offset, (address)thread);
1661 }
1662
1663 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1664 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1665 }
1666
1667 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1668 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1669 }
1670
1671 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1672 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1673 }
1674
1675 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1676 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1677 }
1678
1679 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1680 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1681 int val = VTMS_transition_disable_count(java_thread);
1682 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1683 }
1684
1685 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1686 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1687 int val = VTMS_transition_disable_count(java_thread);
1688 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1689 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1690 }
1691
1692 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1693 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1694 }
1695
1696 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1697 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1698 }
1699
1700 int java_lang_Thread::is_in_VTMS_transition_offset() {
1701 return _jvmti_is_in_VTMS_transition_offset;
1702 }
1703
1704 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1705 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1706 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1707 }
1708
1709 oop java_lang_Thread::holder(oop java_thread) {
1710 // Note: may return null if the thread is still attaching
1711 return java_thread->obj_field(_holder_offset);
1712 }
1713
1714 bool java_lang_Thread::interrupted(oop java_thread) {
1715 // Make sure the caller can safely access oops.
1716 assert(Thread::current()->is_VM_thread() ||
1717 (JavaThread::current()->thread_state() != _thread_blocked &&
1718 JavaThread::current()->thread_state() != _thread_in_native),
1719 "Unsafe access to oop");
1720 return java_thread->bool_field_volatile(_interrupted_offset);
1721 }
1722
1723 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1724 // Make sure the caller can safely access oops.
1725 assert(Thread::current()->is_VM_thread() ||
1726 (JavaThread::current()->thread_state() != _thread_blocked &&
1727 JavaThread::current()->thread_state() != _thread_in_native),
1728 "Unsafe access to oop");
1729 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1730 }
1731
1732
1733 oop java_lang_Thread::name(oop java_thread) {
1734 return java_thread->obj_field(_name_offset);
1735 }
1736
1737
1738 void java_lang_Thread::set_name(oop java_thread, oop name) {
1739 java_thread->obj_field_put(_name_offset, name);
1740 }
1741
1742 // Convenience macros for setting and getting Thread fields that
1743 // are actually stored in the FieldHolder object of the thread.
1744 // The FieldHolder can be null whilst a thread is attaching via
1745 // JNI, and when the main thread is attaching.
1746
1747 // The default value should be the default/zero initialized value
1748 // of the field as it would be in java.lang.Thread.FieldHolder.
1749 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1750 { \
1751 oop holder = java_lang_Thread::holder(java_thread); \
1752 if (holder != nullptr) \
1753 return java_lang_Thread_FieldHolder::field(holder); \
1754 else \
1755 return default_val; \
1756 }
1757
1758 // We should never be trying to set a field of an attaching thread.
1759 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1760 { \
1761 oop holder = java_lang_Thread::holder(java_thread); \
1762 assert(holder != nullptr, "Thread not fully initialized"); \
1763 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1764 }
1765
1766
1767 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1768 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1769 }
1770
1771
1772 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1773 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1774 }
1775
1776
1777 oop java_lang_Thread::threadGroup(oop java_thread) {
1778 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1779 }
1780
1781
1782 bool java_lang_Thread::is_alive(oop java_thread) {
1783 JavaThread* thr = java_lang_Thread::thread(java_thread);
1784 return (thr != nullptr);
1785 }
1786
1787
1788 bool java_lang_Thread::is_daemon(oop java_thread) {
1789 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1790 }
1791
1792
1793 void java_lang_Thread::set_daemon(oop java_thread) {
1794 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1795 }
1796
1797 oop java_lang_Thread::context_class_loader(oop java_thread) {
1798 return java_thread->obj_field(_contextClassLoader_offset);
1799 }
1800
1801 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1802 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1803 }
1804
1805
1806 jlong java_lang_Thread::stackSize(oop java_thread) {
1807 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1808 }
1809
1810 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1811 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1812 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1813 }
1814
1815 // Read thread status value from threadStatus field in java.lang.Thread java class.
1816 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1817 // Make sure the caller is operating on behalf of the VM or is
1818 // running VM code (state == _thread_in_vm).
1819 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1820 JavaThread::current()->thread_state() == _thread_in_vm,
1821 "Java Thread is not running in vm");
1822 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1823 }
1824
1825 ByteSize java_lang_Thread::thread_id_offset() {
1826 return in_ByteSize(_tid_offset);
1827 }
1828
1829 oop java_lang_Thread::park_blocker(oop java_thread) {
1830 return java_thread->obj_field(_park_blocker_offset);
1831 }
1832
1833 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1834 ThreadsListHandle tlh(JavaThread::current());
1835 JavaThread* thread;
1836 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1837 if (is_virtual) {
1838 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1839 if (carrier_thread == nullptr) {
1840 return nullptr;
1841 }
1842 thread = java_lang_Thread::thread(carrier_thread);
1843 } else {
1844 thread = java_lang_Thread::thread(java_thread);
1845 }
1846 if (thread == nullptr) {
1847 return nullptr;
1848 }
1849
1850 class GetStackTraceClosure : public HandshakeClosure {
1851 public:
1852 const Handle _java_thread;
1853 int _depth;
1854 bool _retry_handshake;
1855 GrowableArray<Method*>* _methods;
1856 GrowableArray<int>* _bcis;
1857
1858 GetStackTraceClosure(Handle java_thread) :
1859 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1860 _methods(nullptr), _bcis(nullptr) {
1861 }
1862 ~GetStackTraceClosure() {
1863 delete _methods;
1864 delete _bcis;
1865 }
1866
1867 bool read_reset_retry() {
1868 bool ret = _retry_handshake;
1869 // If we re-execute the handshake this method need to return false
1870 // when the handshake cannot be performed. (E.g. thread terminating)
1871 _retry_handshake = false;
1872 return ret;
1873 }
1874
1875 void do_thread(Thread* th) {
1876 if (!Thread::current()->is_Java_thread()) {
1877 _retry_handshake = true;
1878 return;
1879 }
1880
1881 JavaThread* thread = JavaThread::cast(th);
1882
1883 if (!thread->has_last_Java_frame()) {
1884 return;
1885 }
1886
1887 bool carrier = false;
1888 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1889 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1890 const ContinuationEntry* ce = thread->vthread_continuation();
1891 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1892 return; // not mounted
1893 }
1894 } else {
1895 carrier = (thread->vthread_continuation() != nullptr);
1896 }
1897
1898 const int max_depth = MaxJavaStackTraceDepth;
1899 const bool skip_hidden = !ShowHiddenFrames;
1900
1901 // Pick minimum length that will cover most cases
1902 int init_length = 64;
1903 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1904 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1905
1906 int total_count = 0;
1907 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1908 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1909 vfst.next()) {
1910
1911 if (skip_hidden && (vfst.method()->is_hidden() ||
1912 vfst.method()->is_continuation_enter_intrinsic())) {
1913 continue;
1914 }
1915
1916 _methods->push(vfst.method());
1917 _bcis->push(vfst.bci());
1918 total_count++;
1919 }
1920
1921 _depth = total_count;
1922 }
1923 };
1924
1925 // Handshake with target
1926 ResourceMark rm(THREAD);
1927 HandleMark hm(THREAD);
1928 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1929 do {
1930 Handshake::execute(&gstc, &tlh, thread);
1931 } while (gstc.read_reset_retry());
1932
1933 // Stop if no stack trace is found.
1934 if (gstc._depth == 0) {
1935 return nullptr;
1936 }
1937
1938 // Convert to StackTraceElement array
1939 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1940 assert(k != nullptr, "must be loaded in 1.4+");
1941 if (k->should_be_initialized()) {
1942 k->initialize(CHECK_NULL);
1943 }
1944 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1945
1946 for (int i = 0; i < gstc._depth; i++) {
1947 methodHandle method(THREAD, gstc._methods->at(i));
1948 oop element = java_lang_StackTraceElement::create(method,
1949 gstc._bcis->at(i),
1950 CHECK_NULL);
1951 trace->obj_at_put(i, element);
1952 }
1953
1954 return trace();
1955 }
1956
1957 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1958 JavaThreadStatus status = get_thread_status(java_thread);
1959 switch (status) {
1960 case JavaThreadStatus::NEW : return "NEW";
1961 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
1962 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
1963 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1964 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1965 case JavaThreadStatus::PARKED : return "WAITING (parking)";
1966 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
1967 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1968 case JavaThreadStatus::TERMINATED : return "TERMINATED";
1969 default : return "UNKNOWN";
1970 };
1971 }
1972 int java_lang_ThreadGroup::_parent_offset;
1973 int java_lang_ThreadGroup::_name_offset;
1974 int java_lang_ThreadGroup::_maxPriority_offset;
1975 int java_lang_ThreadGroup::_daemon_offset;
1976
1977 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1978 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1979 return java_thread_group->obj_field(_parent_offset);
1980 }
1981
1982 // ("name as oop" accessor is not necessary)
1983
1984 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1985 oop name = java_thread_group->obj_field(_name_offset);
1986 // ThreadGroup.name can be null
1987 if (name != nullptr) {
1988 return java_lang_String::as_utf8_string(name);
1989 }
1990 return nullptr;
1991 }
1992
1993 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1994 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1995 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1996 }
1997
1998 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1999 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2000 return java_thread_group->bool_field(_daemon_offset) != 0;
2001 }
2002
2003 #define THREADGROUP_FIELDS_DO(macro) \
2004 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2005 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2006 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2007 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2008
2009 void java_lang_ThreadGroup::compute_offsets() {
2010 assert(_parent_offset == 0, "offsets should be initialized only once");
2011
2012 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2013 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2014 }
2015
2016 #if INCLUDE_CDS
2017 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2018 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2019 }
2020 #endif
2021
2022
2023 // java_lang_VirtualThread
2024
2025 int java_lang_VirtualThread::static_vthread_scope_offset;
2026 int java_lang_VirtualThread::_carrierThread_offset;
2027 int java_lang_VirtualThread::_continuation_offset;
2028 int java_lang_VirtualThread::_state_offset;
2029
2030 #define VTHREAD_FIELDS_DO(macro) \
2031 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2032 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2033 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2034 macro(_state_offset, k, "state", int_signature, false)
2035
2036
2037 void java_lang_VirtualThread::compute_offsets() {
2038 InstanceKlass* k = vmClasses::VirtualThread_klass();
2039 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2040 }
2041
2042 bool java_lang_VirtualThread::is_instance(oop obj) {
2043 return obj != nullptr && is_subclass(obj->klass());
2044 }
2045
2046 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2047 oop thread = vthread->obj_field(_carrierThread_offset);
2048 return thread;
2049 }
2050
2051 oop java_lang_VirtualThread::continuation(oop vthread) {
2052 oop cont = vthread->obj_field(_continuation_offset);
2053 return cont;
2054 }
2055
2056 int java_lang_VirtualThread::state(oop vthread) {
2057 return vthread->int_field_acquire(_state_offset);
2058 }
2059
2060 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2061 JavaThreadStatus status = JavaThreadStatus::NEW;
2062 switch (state) {
2063 case NEW :
2064 status = JavaThreadStatus::NEW;
2065 break;
2066 case STARTED :
2067 case RUNNABLE :
2068 case RUNNABLE_SUSPENDED :
2069 case RUNNING :
2070 case PARKING :
2071 case YIELDING :
2072 status = JavaThreadStatus::RUNNABLE;
2073 break;
2074 case PARKED :
2075 case PARKED_SUSPENDED :
2076 case PINNED :
2077 status = JavaThreadStatus::PARKED;
2078 break;
2079 case TERMINATED :
2080 status = JavaThreadStatus::TERMINATED;
2081 break;
2082 default:
2083 ShouldNotReachHere();
2084 }
2085 return status;
2086 }
2087
2088 #if INCLUDE_CDS
2089 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2090 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2091 }
2092 #endif
2093
2094 // java_lang_Throwable
2095
2096 int java_lang_Throwable::_backtrace_offset;
2097 int java_lang_Throwable::_detailMessage_offset;
2098 int java_lang_Throwable::_stackTrace_offset;
2099 int java_lang_Throwable::_depth_offset;
2100 int java_lang_Throwable::_cause_offset;
2101 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2102
2103 #define THROWABLE_FIELDS_DO(macro) \
2104 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2105 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2106 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2107 macro(_depth_offset, k, "depth", int_signature, false); \
2108 macro(_cause_offset, k, "cause", throwable_signature, false); \
2109 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2110
2111 void java_lang_Throwable::compute_offsets() {
2112 InstanceKlass* k = vmClasses::Throwable_klass();
2113 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2114 }
2115
2116 #if INCLUDE_CDS
2117 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2118 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2119 }
2120 #endif
2121
2122 oop java_lang_Throwable::unassigned_stacktrace() {
2123 InstanceKlass* ik = vmClasses::Throwable_klass();
2124 oop base = ik->static_field_base_raw();
2125 return base->obj_field(_static_unassigned_stacktrace_offset);
2126 }
2127
2128 oop java_lang_Throwable::backtrace(oop throwable) {
2129 return throwable->obj_field_acquire(_backtrace_offset);
2130 }
2131
2132
2133 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2134 throwable->release_obj_field_put(_backtrace_offset, value);
2135 }
2136
2137 int java_lang_Throwable::depth(oop throwable) {
2138 return throwable->int_field(_depth_offset);
2139 }
2140
2141 void java_lang_Throwable::set_depth(oop throwable, int value) {
2142 throwable->int_field_put(_depth_offset, value);
2143 }
2144
2145 oop java_lang_Throwable::message(oop throwable) {
2146 return throwable->obj_field(_detailMessage_offset);
2147 }
2148
2149 oop java_lang_Throwable::cause(oop throwable) {
2150 return throwable->obj_field(_cause_offset);
2151 }
2152
2153 // Return Symbol for detailed_message or null
2154 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2155 PreserveExceptionMark pm(Thread::current());
2156 oop detailed_message = java_lang_Throwable::message(throwable);
2157 if (detailed_message != nullptr) {
2158 return java_lang_String::as_symbol(detailed_message);
2159 }
2160 return nullptr;
2161 }
2162
2163 void java_lang_Throwable::set_message(oop throwable, oop value) {
2164 throwable->obj_field_put(_detailMessage_offset, value);
2165 }
2166
2167
2168 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2169 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2170 }
2171
2172 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2173 set_stacktrace(throwable, nullptr);
2174 }
2175
2176
2177 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2178 ResourceMark rm;
2179 Klass* k = throwable->klass();
2180 assert(k != nullptr, "just checking");
2181 st->print("%s", k->external_name());
2182 oop msg = message(throwable);
2183 if (msg != nullptr) {
2184 st->print(": %s", java_lang_String::as_utf8_string(msg));
2185 }
2186 }
2187
2188 // After this many redefines, the stack trace is unreliable.
2189 const int MAX_VERSION = USHRT_MAX;
2190
2191 static inline bool version_matches(Method* method, int version) {
2192 assert(version < MAX_VERSION, "version is too big");
2193 return method != nullptr && (method->constants()->version() == version);
2194 }
2195
2196 // This class provides a simple wrapper over the internal structure of
2197 // exception backtrace to insulate users of the backtrace from needing
2198 // to know what it looks like.
2199 // The code of this class is not GC safe. Allocations can only happen
2200 // in expand().
2201 class BacktraceBuilder: public StackObj {
2202 friend class BacktraceIterator;
2203 private:
2204 Handle _backtrace;
2205 objArrayOop _head;
2206 typeArrayOop _methods;
2207 typeArrayOop _bcis;
2208 objArrayOop _mirrors;
2209 typeArrayOop _names; // Needed to insulate method name against redefinition.
2210 // True if the top frame of the backtrace is omitted because it shall be hidden.
2211 bool _has_hidden_top_frame;
2212 int _index;
2213 NoSafepointVerifier _nsv;
2214
2215 enum {
2216 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2217 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2218 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2219 trace_names_offset = java_lang_Throwable::trace_names_offset,
2220 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2221 trace_next_offset = java_lang_Throwable::trace_next_offset,
2222 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2223 trace_size = java_lang_Throwable::trace_size,
2224 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2225 };
2226
2227 // get info out of chunks
2228 static typeArrayOop get_methods(objArrayHandle chunk) {
2229 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2230 assert(methods != nullptr, "method array should be initialized in backtrace");
2231 return methods;
2232 }
2233 static typeArrayOop get_bcis(objArrayHandle chunk) {
2234 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2235 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2236 return bcis;
2237 }
2238 static objArrayOop get_mirrors(objArrayHandle chunk) {
2239 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2240 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2241 return mirrors;
2242 }
2243 static typeArrayOop get_names(objArrayHandle chunk) {
2244 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2245 assert(names != nullptr, "names array should be initialized in backtrace");
2246 return names;
2247 }
2248 static bool has_hidden_top_frame(objArrayHandle chunk) {
2249 oop hidden = chunk->obj_at(trace_hidden_offset);
2250 return hidden != nullptr;
2251 }
2252
2253 public:
2254
2255 // constructor for new backtrace
2256 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2257 expand(CHECK);
2258 _backtrace = Handle(THREAD, _head);
2259 _index = 0;
2260 }
2261
2262 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2263 _methods = get_methods(backtrace);
2264 _bcis = get_bcis(backtrace);
2265 _mirrors = get_mirrors(backtrace);
2266 _names = get_names(backtrace);
2267 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2268 assert(_methods->length() == _bcis->length() &&
2269 _methods->length() == _mirrors->length() &&
2270 _mirrors->length() == _names->length(),
2271 "method and source information arrays should match");
2272
2273 // head is the preallocated backtrace
2274 _head = backtrace();
2275 _backtrace = Handle(thread, _head);
2276 _index = 0;
2277 }
2278
2279 void expand(TRAPS) {
2280 objArrayHandle old_head(THREAD, _head);
2281 PauseNoSafepointVerifier pnsv(&_nsv);
2282
2283 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2284 objArrayHandle new_head(THREAD, head);
2285
2286 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2287 typeArrayHandle new_methods(THREAD, methods);
2288
2289 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2290 typeArrayHandle new_bcis(THREAD, bcis);
2291
2292 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2293 objArrayHandle new_mirrors(THREAD, mirrors);
2294
2295 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2296 typeArrayHandle new_names(THREAD, names);
2297
2298 if (!old_head.is_null()) {
2299 old_head->obj_at_put(trace_next_offset, new_head());
2300 }
2301 new_head->obj_at_put(trace_methods_offset, new_methods());
2302 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2303 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2304 new_head->obj_at_put(trace_names_offset, new_names());
2305 new_head->obj_at_put(trace_hidden_offset, nullptr);
2306
2307 _head = new_head();
2308 _methods = new_methods();
2309 _bcis = new_bcis();
2310 _mirrors = new_mirrors();
2311 _names = new_names();
2312 _index = 0;
2313 }
2314
2315 oop backtrace() {
2316 return _backtrace();
2317 }
2318
2319 inline void push(Method* method, int bci, TRAPS) {
2320 // Smear the -1 bci to 0 since the array only holds unsigned
2321 // shorts. The later line number lookup would just smear the -1
2322 // to a 0 even if it could be recorded.
2323 if (bci == SynchronizationEntryBCI) bci = 0;
2324
2325 if (_index >= trace_chunk_size) {
2326 methodHandle mhandle(THREAD, method);
2327 expand(CHECK);
2328 method = mhandle();
2329 }
2330
2331 _methods->ushort_at_put(_index, method->orig_method_idnum());
2332 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2333
2334 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2335 // klass owning the symbols alive so their refcounts aren't decremented.
2336 Symbol* name = method->name();
2337 _names->symbol_at_put(_index, name);
2338
2339 // We need to save the mirrors in the backtrace to keep the class
2340 // from being unloaded while we still have this stack trace.
2341 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2342 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2343
2344 _index++;
2345 }
2346
2347 void set_has_hidden_top_frame() {
2348 if (!_has_hidden_top_frame) {
2349 // It would be nice to add java/lang/Boolean::TRUE here
2350 // to indicate that this backtrace has a hidden top frame.
2351 // But this code is used before TRUE is allocated.
2352 // Therefore let's just use an arbitrary legal oop
2353 // available right here. _methods is a short[].
2354 assert(_methods != nullptr, "we need a legal oop");
2355 _has_hidden_top_frame = true;
2356 _head->obj_at_put(trace_hidden_offset, _methods);
2357 }
2358 }
2359 };
2360
2361 struct BacktraceElement : public StackObj {
2362 int _method_id;
2363 int _bci;
2364 int _version;
2365 Symbol* _name;
2366 Handle _mirror;
2367 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2368 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2369 };
2370
2371 class BacktraceIterator : public StackObj {
2372 int _index;
2373 objArrayHandle _result;
2374 objArrayHandle _mirrors;
2375 typeArrayHandle _methods;
2376 typeArrayHandle _bcis;
2377 typeArrayHandle _names;
2378
2379 void init(objArrayHandle result, Thread* thread) {
2380 // Get method id, bci, version and mirror from chunk
2381 _result = result;
2382 if (_result.not_null()) {
2383 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2384 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2385 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2386 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2387 _index = 0;
2388 }
2389 }
2390 public:
2391 BacktraceIterator(objArrayHandle result, Thread* thread) {
2392 init(result, thread);
2393 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2394 }
2395
2396 BacktraceElement next(Thread* thread) {
2397 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2398 _methods->ushort_at(_index),
2399 Backtrace::version_at(_bcis->int_at(_index)),
2400 Backtrace::bci_at(_bcis->int_at(_index)),
2401 _names->symbol_at(_index));
2402 _index++;
2403
2404 if (_index >= java_lang_Throwable::trace_chunk_size) {
2405 int next_offset = java_lang_Throwable::trace_next_offset;
2406 // Get next chunk
2407 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2408 init(result, thread);
2409 }
2410 return e;
2411 }
2412
2413 bool repeat() {
2414 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2415 }
2416 };
2417
2418
2419 // Print stack trace element to resource allocated buffer
2420 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2421 int version, int bci, Symbol* name) {
2422 ResourceMark rm;
2423
2424 // Get strings and string lengths
2425 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2426 const char* klass_name = holder->external_name();
2427 int buf_len = (int)strlen(klass_name);
2428
2429 char* method_name = name->as_C_string();
2430 buf_len += (int)strlen(method_name);
2431
2432 char* source_file_name = nullptr;
2433 Symbol* source = Backtrace::get_source_file_name(holder, version);
2434 if (source != nullptr) {
2435 source_file_name = source->as_C_string();
2436 buf_len += (int)strlen(source_file_name);
2437 }
2438
2439 char *module_name = nullptr, *module_version = nullptr;
2440 ModuleEntry* module = holder->module();
2441 if (module->is_named()) {
2442 module_name = module->name()->as_C_string();
2443 buf_len += (int)strlen(module_name);
2444 if (module->version() != nullptr) {
2445 module_version = module->version()->as_C_string();
2446 buf_len += (int)strlen(module_version);
2447 }
2448 }
2449
2450 // Allocate temporary buffer with extra space for formatting and line number
2451 const size_t buf_size = buf_len + 64;
2452 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2453
2454 // Print stack trace line in buffer
2455 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2456
2457 // Print module information
2458 if (module_name != nullptr) {
2459 if (module_version != nullptr) {
2460 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2461 } else {
2462 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2463 }
2464 }
2465
2466 // The method can be null if the requested class version is gone
2467 Method* method = holder->method_with_orig_idnum(method_id, version);
2468 if (!version_matches(method, version)) {
2469 strcat(buf, "Redefined)");
2470 } else {
2471 int line_number = Backtrace::get_line_number(method, bci);
2472 if (line_number == -2) {
2473 strcat(buf, "Native Method)");
2474 } else {
2475 if (source_file_name != nullptr && (line_number != -1)) {
2476 // Sourcename and linenumber
2477 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2478 } else if (source_file_name != nullptr) {
2479 // Just sourcename
2480 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2481 } else {
2482 // Neither sourcename nor linenumber
2483 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2484 }
2485 CompiledMethod* nm = method->code();
2486 if (WizardMode && nm != nullptr) {
2487 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2488 }
2489 }
2490 }
2491
2492 st->print_cr("%s", buf);
2493 }
2494
2495 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2496 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2497 int method_id = method->orig_method_idnum();
2498 int version = method->constants()->version();
2499 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2500 }
2501
2502 /**
2503 * Print the throwable message and its stack trace plus all causes by walking the
2504 * cause chain. The output looks the same as of Throwable.printStackTrace().
2505 */
2506 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2507 // First, print the message.
2508 print(throwable(), st);
2509 st->cr();
2510
2511 // Now print the stack trace.
2512 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2513 while (throwable.not_null()) {
2514 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2515 if (result.is_null()) {
2516 st->print_raw_cr("\t<<no stack trace available>>");
2517 return;
2518 }
2519 BacktraceIterator iter(result, THREAD);
2520
2521 while (iter.repeat()) {
2522 BacktraceElement bte = iter.next(THREAD);
2523 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2524 }
2525 {
2526 // Call getCause() which doesn't necessarily return the _cause field.
2527 ExceptionMark em(THREAD);
2528 JavaValue cause(T_OBJECT);
2529 JavaCalls::call_virtual(&cause,
2530 throwable,
2531 throwable->klass(),
2532 vmSymbols::getCause_name(),
2533 vmSymbols::void_throwable_signature(),
2534 THREAD);
2535 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2536 if (HAS_PENDING_EXCEPTION) {
2537 CLEAR_PENDING_EXCEPTION;
2538 throwable = Handle();
2539 } else {
2540 throwable = Handle(THREAD, cause.get_oop());
2541 if (throwable.not_null()) {
2542 st->print("Caused by: ");
2543 print(throwable(), st);
2544 st->cr();
2545 }
2546 }
2547 }
2548 }
2549 }
2550
2551 /**
2552 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2553 */
2554 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2555 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2556 JavaValue result(T_VOID);
2557 JavaCalls::call_virtual(&result,
2558 throwable,
2559 vmClasses::Throwable_klass(),
2560 vmSymbols::printStackTrace_name(),
2561 vmSymbols::void_method_signature(),
2562 THREAD);
2563 }
2564
2565 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2566 if (!StackTraceInThrowable) return;
2567 ResourceMark rm(THREAD);
2568
2569 // Start out by clearing the backtrace for this object, in case the VM
2570 // runs out of memory while allocating the stack trace
2571 set_backtrace(throwable(), nullptr);
2572 // Clear lazily constructed Java level stacktrace if refilling occurs
2573 // This is unnecessary in 1.7+ but harmless
2574 clear_stacktrace(throwable());
2575
2576 int max_depth = MaxJavaStackTraceDepth;
2577 JavaThread* thread = THREAD;
2578
2579 BacktraceBuilder bt(CHECK);
2580
2581 // If there is no Java frame just return the method that was being called
2582 // with bci 0
2583 if (!thread->has_last_Java_frame()) {
2584 if (max_depth >= 1 && method() != nullptr) {
2585 bt.push(method(), 0, CHECK);
2586 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2587 set_depth(throwable(), 1);
2588 set_backtrace(throwable(), bt.backtrace());
2589 }
2590 return;
2591 }
2592
2593 // Instead of using vframe directly, this version of fill_in_stack_trace
2594 // basically handles everything by hand. This significantly improved the
2595 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2596 // See bug 6333838 for more details.
2597 // The "ASSERT" here is to verify this method generates the exactly same stack
2598 // trace as utilizing vframe.
2599 #ifdef ASSERT
2600 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2601 #endif
2602 int total_count = 0;
2603 RegisterMap map(thread,
2604 RegisterMap::UpdateMap::skip,
2605 RegisterMap::ProcessFrames::skip,
2606 RegisterMap::WalkContinuation::include);
2607 int decode_offset = 0;
2608 CompiledMethod* nm = nullptr;
2609 bool skip_fillInStackTrace_check = false;
2610 bool skip_throwableInit_check = false;
2611 bool skip_hidden = !ShowHiddenFrames;
2612 bool show_carrier = ShowCarrierFrames;
2613 ContinuationEntry* cont_entry = thread->last_continuation();
2614 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2615 Method* method = nullptr;
2616 int bci = 0;
2617
2618 // Compiled java method case.
2619 if (decode_offset != 0) {
2620 DebugInfoReadStream stream(nm, decode_offset);
2621 decode_offset = stream.read_int();
2622 method = (Method*)nm->metadata_at(stream.read_int());
2623 bci = stream.read_bci();
2624 } else {
2625 if (fr.is_first_frame()) break;
2626
2627 if (Continuation::is_continuation_enterSpecial(fr)) {
2628 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2629 if (!show_carrier && cont_entry->is_virtual_thread()) {
2630 break;
2631 }
2632 cont_entry = cont_entry->parent();
2633 }
2634
2635 address pc = fr.pc();
2636 if (fr.is_interpreted_frame()) {
2637 address bcp;
2638 if (!map.in_cont()) {
2639 bcp = fr.interpreter_frame_bcp();
2640 method = fr.interpreter_frame_method();
2641 } else {
2642 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2643 method = map.stack_chunk()->interpreter_frame_method(fr);
2644 }
2645 bci = method->bci_from(bcp);
2646 fr = fr.sender(&map);
2647 } else {
2648 CodeBlob* cb = fr.cb();
2649 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2650 // but non nmethod
2651 fr = fr.sender(&map);
2652 if (cb == nullptr || !cb->is_compiled()) {
2653 continue;
2654 }
2655 nm = cb->as_compiled_method();
2656 assert(nm->method() != nullptr, "must be");
2657 if (nm->method()->is_native()) {
2658 method = nm->method();
2659 bci = 0;
2660 } else {
2661 PcDesc* pd = nm->pc_desc_at(pc);
2662 decode_offset = pd->scope_decode_offset();
2663 // if decode_offset is not equal to 0, it will execute the
2664 // "compiled java method case" at the beginning of the loop.
2665 continue;
2666 }
2667 }
2668 }
2669 #ifdef ASSERT
2670 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2671 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2672 st.next();
2673 }
2674 #endif
2675
2676 // the format of the stacktrace will be:
2677 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2678 // - 0 or more <init> methods for the exception class (skipped)
2679 // - rest of the stack
2680
2681 if (!skip_fillInStackTrace_check) {
2682 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2683 throwable->is_a(method->method_holder())) {
2684 continue;
2685 }
2686 else {
2687 skip_fillInStackTrace_check = true; // gone past them all
2688 }
2689 }
2690 if (!skip_throwableInit_check) {
2691 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2692
2693 // skip <init> methods of the exception class and superclasses
2694 // This is similar to classic VM.
2695 if (method->is_object_constructor() &&
2696 throwable->is_a(method->method_holder())) {
2697 continue;
2698 } else {
2699 // there are none or we've seen them all - either way stop checking
2700 skip_throwableInit_check = true;
2701 }
2702 }
2703 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2704 if (skip_hidden) {
2705 if (total_count == 0) {
2706 // The top frame will be hidden from the stack trace.
2707 bt.set_has_hidden_top_frame();
2708 }
2709 continue;
2710 }
2711 }
2712
2713 bt.push(method, bci, CHECK);
2714 total_count++;
2715 }
2716
2717 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2718
2719 // Put completed stack trace into throwable object
2720 set_backtrace(throwable(), bt.backtrace());
2721 set_depth(throwable(), total_count);
2722 }
2723
2724 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2725 // No-op if stack trace is disabled
2726 if (!StackTraceInThrowable) {
2727 return;
2728 }
2729
2730 // Disable stack traces for some preallocated out of memory errors
2731 if (!Universe::should_fill_in_stack_trace(throwable)) {
2732 return;
2733 }
2734
2735 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2736 PreserveExceptionMark pm(THREAD);
2737
2738 fill_in_stack_trace(throwable, method, THREAD);
2739 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2740 // original exception via the PreserveExceptionMark destructor.
2741 CLEAR_PENDING_EXCEPTION;
2742 }
2743
2744 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2745 // Allocate stack trace - backtrace is created but not filled in
2746
2747 // No-op if stack trace is disabled
2748 if (!StackTraceInThrowable) return;
2749 BacktraceBuilder bt(CHECK); // creates a backtrace
2750 set_backtrace(throwable(), bt.backtrace());
2751 }
2752
2753
2754 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2755 // Fill in stack trace into preallocated backtrace (no GC)
2756
2757 // No-op if stack trace is disabled
2758 if (!StackTraceInThrowable) return;
2759
2760 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2761
2762 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2763
2764 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2765 assert(backtrace.not_null(), "backtrace should have been preallocated");
2766
2767 ResourceMark rm(THREAD);
2768 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2769
2770 BacktraceBuilder bt(THREAD, backtrace);
2771
2772 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2773 // methods as preallocated errors aren't created by "java" code.
2774
2775 // fill in as much stack trace as possible
2776 int chunk_count = 0;
2777 for (;!st.at_end(); st.next()) {
2778 bt.push(st.method(), st.bci(), CHECK);
2779 chunk_count++;
2780
2781 // Bail-out for deep stacks
2782 if (chunk_count >= trace_chunk_size) break;
2783 }
2784 set_depth(throwable(), chunk_count);
2785 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2786
2787 // We support the Throwable immutability protocol defined for Java 7.
2788 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2789 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2790 }
2791
2792 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2793 objArrayHandle stack_trace_array_h, TRAPS) {
2794
2795 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2796 THROW(vmSymbols::java_lang_NullPointerException());
2797 }
2798
2799 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2800
2801 if (stack_trace_array_h->length() != depth) {
2802 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2803 }
2804
2805 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2806 BacktraceIterator iter(result, THREAD);
2807
2808 int index = 0;
2809 while (iter.repeat()) {
2810 BacktraceElement bte = iter.next(THREAD);
2811
2812 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2813
2814 if (stack_trace_element.is_null()) {
2815 THROW(vmSymbols::java_lang_NullPointerException());
2816 }
2817
2818 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2819 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2820
2821 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2822 method,
2823 bte._version,
2824 bte._bci,
2825 bte._name,
2826 CHECK);
2827 }
2828 }
2829
2830 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2831 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2832 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2833 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2834 // symbolic stacktrace of 'throwable'.
2835 assert(throwable.not_null(), "shouldn't be");
2836
2837 // Now create the message from the original exception and thread name.
2838 Symbol* message = java_lang_Throwable::detail_message(throwable());
2839 ResourceMark rm(current);
2840 stringStream st;
2841 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2842 message == nullptr ? "" : ":");
2843 if (message == nullptr) {
2844 st.print("[in thread \"%s\"]", current->name());
2845 } else {
2846 st.print("%s [in thread \"%s\"]", message->as_C_string(), current->name());
2847 }
2848
2849 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2850 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2851 // If new_exception returns a different exception while creating the exception,
2852 // abandon the attempt to save the initialization error and return null.
2853 if (init_error->klass()->name() != exception_name) {
2854 log_info(class, init)("Exception thrown while saving initialization exception %s",
2855 init_error->klass()->external_name());
2856 return Handle();
2857 }
2858
2859 // Call to java to fill in the stack trace and clear declaringClassObject to
2860 // not keep classes alive in the stack trace.
2861 // call this: public StackTraceElement[] getStackTrace()
2862 JavaValue result(T_ARRAY);
2863 JavaCalls::call_virtual(&result, throwable,
2864 vmClasses::Throwable_klass(),
2865 vmSymbols::getStackTrace_name(),
2866 vmSymbols::getStackTrace_signature(),
2867 current);
2868 if (!current->has_pending_exception()){
2869 Handle stack_trace(current, result.get_oop());
2870 assert(stack_trace->is_objArray(), "Should be an array");
2871 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2872 // Clear backtrace because the stacktrace should be used instead.
2873 set_backtrace(init_error(), nullptr);
2874 } else {
2875 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2876 init_error->klass()->external_name());
2877 current->clear_pending_exception();
2878 }
2879
2880 return init_error;
2881 }
2882
2883 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2884 JavaThread* current = JavaThread::current();
2885 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2886 BacktraceIterator iter(result, current);
2887 // No backtrace available.
2888 if (!iter.repeat()) return false;
2889
2890 // If the exception happened in a frame that has been hidden, i.e.,
2891 // omitted from the back trace, we can not compute the message.
2892 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2893 if (hidden != nullptr) {
2894 return false;
2895 }
2896
2897 // Get first backtrace element.
2898 BacktraceElement bte = iter.next(current);
2899
2900 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2901 assert(holder != nullptr, "first element should be non-null");
2902 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2903
2904 // Original version is no longer available.
2905 if (m == nullptr || !version_matches(m, bte._version)) {
2906 return false;
2907 }
2908
2909 *method = m;
2910 *bci = bte._bci;
2911 return true;
2912 }
2913
2914 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2915 // Allocate java.lang.StackTraceElement instance
2916 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2917 assert(k != nullptr, "must be loaded in 1.4+");
2918 if (k->should_be_initialized()) {
2919 k->initialize(CHECK_NULL);
2920 }
2921
2922 Handle element = k->allocate_instance_handle(CHECK_NULL);
2923
2924 int version = method->constants()->version();
2925 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2926 return element();
2927 }
2928
2929 void java_lang_StackTraceElement::fill_in(Handle element,
2930 InstanceKlass* holder, const methodHandle& method,
2931 int version, int bci, Symbol* name, TRAPS) {
2932 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
2933
2934 ResourceMark rm(THREAD);
2935 HandleMark hm(THREAD);
2936
2937 // Fill in class name
2938 Handle java_class(THREAD, holder->java_mirror());
2939 oop classname = java_lang_Class::name(java_class, CHECK);
2940 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2941 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2942
2943 oop loader = holder->class_loader();
2944 if (loader != nullptr) {
2945 oop loader_name = java_lang_ClassLoader::name(loader);
2946 if (loader_name != nullptr)
2947 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2948 }
2949
2950 // Fill in method name
2951 oop methodname = StringTable::intern(name, CHECK);
2952 java_lang_StackTraceElement::set_methodName(element(), methodname);
2953
2954 // Fill in module name and version
2955 ModuleEntry* module = holder->module();
2956 if (module->is_named()) {
2957 oop module_name = StringTable::intern(module->name(), CHECK);
2958 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2959 oop module_version;
2960 if (module->version() != nullptr) {
2961 module_version = StringTable::intern(module->version(), CHECK);
2962 } else {
2963 module_version = nullptr;
2964 }
2965 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2966 }
2967
2968 if (method() == nullptr || !version_matches(method(), version)) {
2969 // The method was redefined, accurate line number information isn't available
2970 java_lang_StackTraceElement::set_fileName(element(), nullptr);
2971 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2972 } else {
2973 Symbol* source;
2974 oop source_file;
2975 int line_number;
2976 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
2977
2978 java_lang_StackTraceElement::set_fileName(element(), source_file);
2979 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2980 }
2981 }
2982
2983 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
2984 InstanceKlass* holder,
2985 int version,
2986 const methodHandle& method,
2987 int bci,
2988 Symbol*& source,
2989 oop& source_file,
2990 int& line_number, TRAPS) {
2991 // Fill in source file name and line number.
2992 source = Backtrace::get_source_file_name(holder, version);
2993 source_file = java_lang_Class::source_file(java_class());
2994 if (source != nullptr) {
2995 // Class was not redefined. We can trust its cache if set,
2996 // else we have to initialize it.
2997 if (source_file == nullptr) {
2998 source_file = StringTable::intern(source, CHECK);
2999 java_lang_Class::set_source_file(java_class(), source_file);
3000 }
3001 } else {
3002 // Class was redefined. Dump the cache if it was set.
3003 if (source_file != nullptr) {
3004 source_file = nullptr;
3005 java_lang_Class::set_source_file(java_class(), source_file);
3006 }
3007 }
3008 line_number = Backtrace::get_line_number(method(), bci);
3009 }
3010
3011 #if INCLUDE_JVMCI
3012 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3013 Symbol*& filename, int& line_number, TRAPS) {
3014 ResourceMark rm(THREAD);
3015 HandleMark hm(THREAD);
3016
3017 filename = nullptr;
3018 line_number = -1;
3019
3020 oop source_file;
3021 int version = method->constants()->version();
3022 InstanceKlass* holder = method->method_holder();
3023 Handle java_class(THREAD, holder->java_mirror());
3024 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3025 }
3026 #endif // INCLUDE_JVMCI
3027
3028 // java_lang_StackFrameInfo
3029
3030 int java_lang_StackFrameInfo::_memberName_offset;
3031 int java_lang_StackFrameInfo::_bci_offset;
3032 int java_lang_StackFrameInfo::_version_offset;
3033 int java_lang_StackFrameInfo::_contScope_offset;
3034
3035 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3036 macro(_memberName_offset, k, "memberName", object_signature, false); \
3037 macro(_bci_offset, k, "bci", int_signature, false); \
3038 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3039
3040 void java_lang_StackFrameInfo::compute_offsets() {
3041 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3042 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3043 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3044 }
3045
3046 #if INCLUDE_CDS
3047 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3048 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3049 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3050 }
3051 #endif
3052
3053 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
3054 HandleMark hm(THREAD);
3055 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
3056 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
3057 // we should expand MemberName::name when Throwable uses StackTrace
3058 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
3059 return method;
3060 }
3061
3062 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3063 // set Method* or mid/cpref
3064 HandleMark hm(THREAD);
3065 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
3066 Handle cont_h (THREAD, cont);
3067 InstanceKlass* ik = method->method_holder();
3068 CallInfo info(method(), ik, CHECK);
3069 MethodHandles::init_method_MemberName(mname, info);
3070 // set bci
3071 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3072 // method may be redefined; store the version
3073 int version = method->constants()->version();
3074 assert((jushort)version == version, "version should be short");
3075 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3076
3077 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3078 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3079 }
3080
3081 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3082 ResourceMark rm(THREAD);
3083 HandleMark hm(THREAD);
3084 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
3085 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
3086 InstanceKlass* holder = InstanceKlass::cast(clazz);
3087 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
3088
3089 short version = stackFrame->short_field(_version_offset);
3090 int bci = stackFrame->int_field(_bci_offset);
3091 Symbol* name = method->name();
3092 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3093 }
3094
3095 void java_lang_StackFrameInfo::set_version(oop element, short value) {
3096 element->short_field_put(_version_offset, value);
3097 }
3098
3099 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
3100 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3101 element->int_field_put(_bci_offset, value);
3102 }
3103
3104 void java_lang_StackFrameInfo::set_contScope(oop element, oop value) {
3105 element->obj_field_put(_contScope_offset, value);
3106 }
3107
3108 int java_lang_LiveStackFrameInfo::_monitors_offset;
3109 int java_lang_LiveStackFrameInfo::_locals_offset;
3110 int java_lang_LiveStackFrameInfo::_operands_offset;
3111 int java_lang_LiveStackFrameInfo::_mode_offset;
3112
3113 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3114 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3115 macro(_locals_offset, k, "locals", object_array_signature, false); \
3116 macro(_operands_offset, k, "operands", object_array_signature, false); \
3117 macro(_mode_offset, k, "mode", int_signature, false)
3118
3119 void java_lang_LiveStackFrameInfo::compute_offsets() {
3120 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3121 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3122 }
3123
3124 #if INCLUDE_CDS
3125 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3126 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3127 }
3128 #endif
3129
3130 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
3131 element->obj_field_put(_monitors_offset, value);
3132 }
3133
3134 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
3135 element->obj_field_put(_locals_offset, value);
3136 }
3137
3138 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
3139 element->obj_field_put(_operands_offset, value);
3140 }
3141
3142 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
3143 element->int_field_put(_mode_offset, value);
3144 }
3145
3146
3147 // java_lang_AccessibleObject
3148
3149 int java_lang_reflect_AccessibleObject::_override_offset;
3150
3151 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3152 macro(_override_offset, k, "override", bool_signature, false)
3153
3154 void java_lang_reflect_AccessibleObject::compute_offsets() {
3155 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3156 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3157 }
3158
3159 #if INCLUDE_CDS
3160 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3161 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3162 }
3163 #endif
3164
3165 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3166 return (jboolean) reflect->bool_field(_override_offset);
3167 }
3168
3169 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3170 reflect->bool_field_put(_override_offset, (int) value);
3171 }
3172
3173 // java_lang_reflect_Method
3174
3175 int java_lang_reflect_Method::_clazz_offset;
3176 int java_lang_reflect_Method::_name_offset;
3177 int java_lang_reflect_Method::_returnType_offset;
3178 int java_lang_reflect_Method::_parameterTypes_offset;
3179 int java_lang_reflect_Method::_exceptionTypes_offset;
3180 int java_lang_reflect_Method::_slot_offset;
3181 int java_lang_reflect_Method::_modifiers_offset;
3182 int java_lang_reflect_Method::_signature_offset;
3183 int java_lang_reflect_Method::_annotations_offset;
3184 int java_lang_reflect_Method::_parameter_annotations_offset;
3185 int java_lang_reflect_Method::_annotation_default_offset;
3186
3187 #define METHOD_FIELDS_DO(macro) \
3188 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3189 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3190 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3191 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3192 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3193 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3194 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3195 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3196 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3197 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3198 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3199
3200 void java_lang_reflect_Method::compute_offsets() {
3201 InstanceKlass* k = vmClasses::reflect_Method_klass();
3202 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3203 }
3204
3205 #if INCLUDE_CDS
3206 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3207 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3208 }
3209 #endif
3210
3211 Handle java_lang_reflect_Method::create(TRAPS) {
3212 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3213 Klass* klass = vmClasses::reflect_Method_klass();
3214 // This class is eagerly initialized during VM initialization, since we keep a reference
3215 // to one of the methods
3216 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3217 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3218 }
3219
3220 oop java_lang_reflect_Method::clazz(oop reflect) {
3221 return reflect->obj_field(_clazz_offset);
3222 }
3223
3224 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3225 reflect->obj_field_put(_clazz_offset, value);
3226 }
3227
3228 int java_lang_reflect_Method::slot(oop reflect) {
3229 return reflect->int_field(_slot_offset);
3230 }
3231
3232 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3233 reflect->int_field_put(_slot_offset, value);
3234 }
3235
3236 void java_lang_reflect_Method::set_name(oop method, oop value) {
3237 method->obj_field_put(_name_offset, value);
3238 }
3239
3240 oop java_lang_reflect_Method::return_type(oop method) {
3241 return method->obj_field(_returnType_offset);
3242 }
3243
3244 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3245 method->obj_field_put(_returnType_offset, value);
3246 }
3247
3248 oop java_lang_reflect_Method::parameter_types(oop method) {
3249 return method->obj_field(_parameterTypes_offset);
3250 }
3251
3252 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3253 method->obj_field_put(_parameterTypes_offset, value);
3254 }
3255
3256 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3257 method->obj_field_put(_exceptionTypes_offset, value);
3258 }
3259
3260 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3261 method->int_field_put(_modifiers_offset, value);
3262 }
3263
3264 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3265 method->obj_field_put(_signature_offset, value);
3266 }
3267
3268 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3269 method->obj_field_put(_annotations_offset, value);
3270 }
3271
3272 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3273 method->obj_field_put(_parameter_annotations_offset, value);
3274 }
3275
3276 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3277 method->obj_field_put(_annotation_default_offset, value);
3278 }
3279
3280 int java_lang_reflect_Constructor::_clazz_offset;
3281 int java_lang_reflect_Constructor::_parameterTypes_offset;
3282 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3283 int java_lang_reflect_Constructor::_slot_offset;
3284 int java_lang_reflect_Constructor::_modifiers_offset;
3285 int java_lang_reflect_Constructor::_signature_offset;
3286 int java_lang_reflect_Constructor::_annotations_offset;
3287 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3288
3289 #define CONSTRUCTOR_FIELDS_DO(macro) \
3290 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3291 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3292 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3293 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3294 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3295 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3296 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3297 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3298
3299 void java_lang_reflect_Constructor::compute_offsets() {
3300 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3301 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3302 }
3303
3304 #if INCLUDE_CDS
3305 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3306 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3307 }
3308 #endif
3309
3310 Handle java_lang_reflect_Constructor::create(TRAPS) {
3311 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3312 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3313 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3314 InstanceKlass* ik = InstanceKlass::cast(k);
3315 // Ensure it is initialized
3316 ik->initialize(CHECK_NH);
3317 return ik->allocate_instance_handle(THREAD);
3318 }
3319
3320 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3321 return reflect->obj_field(_clazz_offset);
3322 }
3323
3324 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3325 reflect->obj_field_put(_clazz_offset, value);
3326 }
3327
3328 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3329 return constructor->obj_field(_parameterTypes_offset);
3330 }
3331
3332 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3333 constructor->obj_field_put(_parameterTypes_offset, value);
3334 }
3335
3336 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3337 constructor->obj_field_put(_exceptionTypes_offset, value);
3338 }
3339
3340 int java_lang_reflect_Constructor::slot(oop reflect) {
3341 return reflect->int_field(_slot_offset);
3342 }
3343
3344 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3345 reflect->int_field_put(_slot_offset, value);
3346 }
3347
3348 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3349 constructor->int_field_put(_modifiers_offset, value);
3350 }
3351
3352 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3353 constructor->obj_field_put(_signature_offset, value);
3354 }
3355
3356 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3357 constructor->obj_field_put(_annotations_offset, value);
3358 }
3359
3360 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3361 method->obj_field_put(_parameter_annotations_offset, value);
3362 }
3363
3364 int java_lang_reflect_Field::_clazz_offset;
3365 int java_lang_reflect_Field::_name_offset;
3366 int java_lang_reflect_Field::_type_offset;
3367 int java_lang_reflect_Field::_slot_offset;
3368 int java_lang_reflect_Field::_modifiers_offset;
3369 int java_lang_reflect_Field::_trusted_final_offset;
3370 int java_lang_reflect_Field::_signature_offset;
3371 int java_lang_reflect_Field::_annotations_offset;
3372
3373 #define FIELD_FIELDS_DO(macro) \
3374 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3375 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3376 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3377 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3378 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3379 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3380 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3381 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3382
3383 void java_lang_reflect_Field::compute_offsets() {
3384 InstanceKlass* k = vmClasses::reflect_Field_klass();
3385 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3386 }
3387
3388 #if INCLUDE_CDS
3389 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3390 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3391 }
3392 #endif
3393
3394 Handle java_lang_reflect_Field::create(TRAPS) {
3395 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3396 Symbol* name = vmSymbols::java_lang_reflect_Field();
3397 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3398 InstanceKlass* ik = InstanceKlass::cast(k);
3399 // Ensure it is initialized
3400 ik->initialize(CHECK_NH);
3401 return ik->allocate_instance_handle(THREAD);
3402 }
3403
3404 oop java_lang_reflect_Field::clazz(oop reflect) {
3405 return reflect->obj_field(_clazz_offset);
3406 }
3407
3408 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3409 reflect->obj_field_put(_clazz_offset, value);
3410 }
3411
3412 oop java_lang_reflect_Field::name(oop field) {
3413 return field->obj_field(_name_offset);
3414 }
3415
3416 void java_lang_reflect_Field::set_name(oop field, oop value) {
3417 field->obj_field_put(_name_offset, value);
3418 }
3419
3420 oop java_lang_reflect_Field::type(oop field) {
3421 return field->obj_field(_type_offset);
3422 }
3423
3424 void java_lang_reflect_Field::set_type(oop field, oop value) {
3425 field->obj_field_put(_type_offset, value);
3426 }
3427
3428 int java_lang_reflect_Field::slot(oop reflect) {
3429 return reflect->int_field(_slot_offset);
3430 }
3431
3432 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3433 reflect->int_field_put(_slot_offset, value);
3434 }
3435
3436 int java_lang_reflect_Field::modifiers(oop field) {
3437 return field->int_field(_modifiers_offset);
3438 }
3439
3440 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3441 field->int_field_put(_modifiers_offset, value);
3442 }
3443
3444 void java_lang_reflect_Field::set_trusted_final(oop field) {
3445 field->bool_field_put(_trusted_final_offset, true);
3446 }
3447
3448 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3449 field->obj_field_put(_signature_offset, value);
3450 }
3451
3452 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3453 field->obj_field_put(_annotations_offset, value);
3454 }
3455
3456 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3457 // Allocate java.lang.reflect.RecordComponent instance
3458 HandleMark hm(THREAD);
3459 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3460 assert(ik != nullptr, "must be loaded");
3461 ik->initialize(CHECK_NULL);
3462
3463 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3464
3465 Handle decl_class(THREAD, holder->java_mirror());
3466 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3467
3468 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3469 oop component_name = StringTable::intern(name, CHECK_NULL);
3470 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3471
3472 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3473 Handle component_type_h =
3474 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3475 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3476
3477 Method* accessor_method = nullptr;
3478 {
3479 // Prepend "()" to type to create the full method signature.
3480 ResourceMark rm(THREAD);
3481 int sig_len = type->utf8_length() + 3; // "()" and null char
3482 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3483 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3484 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3485 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3486 }
3487
3488 if (accessor_method != nullptr) {
3489 methodHandle method(THREAD, accessor_method);
3490 oop m = Reflection::new_method(method, false, CHECK_NULL);
3491 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3492 } else {
3493 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3494 }
3495
3496 int sig_index = component->generic_signature_index();
3497 if (sig_index > 0) {
3498 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3499 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3500 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3501 } else {
3502 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3503 }
3504
3505 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3506 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3507
3508 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3509 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3510
3511 return element();
3512 }
3513
3514 int reflect_ConstantPool::_oop_offset;
3515
3516 #define CONSTANTPOOL_FIELDS_DO(macro) \
3517 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3518
3519 void reflect_ConstantPool::compute_offsets() {
3520 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3521 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3522 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3523 }
3524
3525 #if INCLUDE_CDS
3526 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3527 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3528 }
3529 #endif
3530
3531 int java_lang_reflect_Parameter::_name_offset;
3532 int java_lang_reflect_Parameter::_modifiers_offset;
3533 int java_lang_reflect_Parameter::_index_offset;
3534 int java_lang_reflect_Parameter::_executable_offset;
3535
3536 #define PARAMETER_FIELDS_DO(macro) \
3537 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3538 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3539 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3540 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3541
3542 void java_lang_reflect_Parameter::compute_offsets() {
3543 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3544 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3545 }
3546
3547 #if INCLUDE_CDS
3548 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3549 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3550 }
3551 #endif
3552
3553 Handle java_lang_reflect_Parameter::create(TRAPS) {
3554 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3555 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3556 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3557 InstanceKlass* ik = InstanceKlass::cast(k);
3558 // Ensure it is initialized
3559 ik->initialize(CHECK_NH);
3560 return ik->allocate_instance_handle(THREAD);
3561 }
3562
3563 oop java_lang_reflect_Parameter::name(oop param) {
3564 return param->obj_field(_name_offset);
3565 }
3566
3567 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3568 param->obj_field_put(_name_offset, value);
3569 }
3570
3571 int java_lang_reflect_Parameter::modifiers(oop param) {
3572 return param->int_field(_modifiers_offset);
3573 }
3574
3575 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3576 param->int_field_put(_modifiers_offset, value);
3577 }
3578
3579 int java_lang_reflect_Parameter::index(oop param) {
3580 return param->int_field(_index_offset);
3581 }
3582
3583 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3584 param->int_field_put(_index_offset, value);
3585 }
3586
3587 oop java_lang_reflect_Parameter::executable(oop param) {
3588 return param->obj_field(_executable_offset);
3589 }
3590
3591 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3592 param->obj_field_put(_executable_offset, value);
3593 }
3594
3595 // java_lang_Module
3596
3597 int java_lang_Module::_loader_offset;
3598 int java_lang_Module::_name_offset;
3599 int java_lang_Module::_module_entry_offset;
3600
3601 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3602 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3603 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3604 vmSymbols::java_lang_module_init_signature(),
3605 loader, module_name, CHECK_NH);
3606 }
3607
3608 #define MODULE_FIELDS_DO(macro) \
3609 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3610 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3611
3612 void java_lang_Module::compute_offsets() {
3613 InstanceKlass* k = vmClasses::Module_klass();
3614 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3615 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3616 }
3617
3618 #if INCLUDE_CDS
3619 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3620 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3621 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3622 }
3623 #endif
3624
3625 oop java_lang_Module::loader(oop module) {
3626 return module->obj_field(_loader_offset);
3627 }
3628
3629 void java_lang_Module::set_loader(oop module, oop value) {
3630 module->obj_field_put(_loader_offset, value);
3631 }
3632
3633 oop java_lang_Module::name(oop module) {
3634 return module->obj_field(_name_offset);
3635 }
3636
3637 void java_lang_Module::set_name(oop module, oop value) {
3638 module->obj_field_put(_name_offset, value);
3639 }
3640
3641 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3642 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3643 assert(module != nullptr, "module can't be null");
3644 assert(oopDesc::is_oop(module), "module must be oop");
3645
3646 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3647 return module_entry;
3648 }
3649
3650 ModuleEntry* java_lang_Module::module_entry(oop module) {
3651 ModuleEntry* module_entry = module_entry_raw(module);
3652 if (module_entry == nullptr) {
3653 // If the inject field containing the ModuleEntry* is null then return the
3654 // class loader's unnamed module.
3655 oop loader = java_lang_Module::loader(module);
3656 Handle h_loader = Handle(Thread::current(), loader);
3657 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3658 return loader_cld->unnamed_module();
3659 }
3660 return module_entry;
3661 }
3662
3663 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3664 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3665 assert(module != nullptr, "module can't be null");
3666 assert(oopDesc::is_oop(module), "module must be oop");
3667 module->address_field_put(_module_entry_offset, (address)module_entry);
3668 }
3669
3670 Handle reflect_ConstantPool::create(TRAPS) {
3671 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3672 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3673 // Ensure it is initialized
3674 k->initialize(CHECK_NH);
3675 return k->allocate_instance_handle(THREAD);
3676 }
3677
3678
3679 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3680 oop mirror = value->pool_holder()->java_mirror();
3681 // Save the mirror to get back the constant pool.
3682 reflect->obj_field_put(_oop_offset, mirror);
3683 }
3684
3685 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3686
3687 oop mirror = reflect->obj_field(_oop_offset);
3688 Klass* k = java_lang_Class::as_Klass(mirror);
3689 assert(k->is_instance_klass(), "Must be");
3690
3691 // Get the constant pool back from the klass. Since class redefinition
3692 // merges the new constant pool into the old, this is essentially the
3693 // same constant pool as the original. If constant pool merging is
3694 // no longer done in the future, this will have to change to save
3695 // the original.
3696 return InstanceKlass::cast(k)->constants();
3697 }
3698
3699 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3700
3701 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3702 macro(_base_offset, k, "base", object_signature, false)
3703
3704 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3705 InstanceKlass* k = vmClasses::reflect_UnsafeStaticFieldAccessorImpl_klass();
3706 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3707 }
3708
3709 #if INCLUDE_CDS
3710 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3711 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3712 }
3713 #endif
3714
3715 // Support for java_lang_ref_Reference
3716
3717 bool java_lang_ref_Reference::_offsets_initialized;
3718
3719 int java_lang_ref_Reference::_referent_offset;
3720 int java_lang_ref_Reference::_queue_offset;
3721 int java_lang_ref_Reference::_next_offset;
3722 int java_lang_ref_Reference::_discovered_offset;
3723
3724 #define REFERENCE_FIELDS_DO(macro) \
3725 macro(_referent_offset, k, "referent", object_signature, false); \
3726 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3727 macro(_next_offset, k, "next", reference_signature, false); \
3728 macro(_discovered_offset, k, "discovered", reference_signature, false);
3729
3730 void java_lang_ref_Reference::compute_offsets() {
3731 if (_offsets_initialized) {
3732 return;
3733 }
3734 _offsets_initialized = true;
3735 InstanceKlass* k = vmClasses::Reference_klass();
3736 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3737 }
3738
3739 #if INCLUDE_CDS
3740 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3741 f->do_bool(&_offsets_initialized);
3742 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3743 }
3744 #endif
3745
3746 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3747 assert(obj != nullptr, "sanity");
3748 if (offset != _referent_offset) {
3749 return false;
3750 }
3751
3752 Klass* k = obj->klass();
3753 if (!k->is_instance_klass()) {
3754 return false;
3755 }
3756
3757 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3758 bool is_reference = ik->reference_type() != REF_NONE;
3759 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3760 return is_reference;
3761 }
3762
3763 int java_lang_boxing_object::_value_offset;
3764 int java_lang_boxing_object::_long_value_offset;
3765
3766 #define BOXING_FIELDS_DO(macro) \
3767 macro(_value_offset, integerKlass, "value", int_signature, false); \
3768 macro(_long_value_offset, longKlass, "value", long_signature, false);
3769
3770 void java_lang_boxing_object::compute_offsets() {
3771 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3772 InstanceKlass* longKlass = vmClasses::Long_klass();
3773 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3774 }
3775
3776 #if INCLUDE_CDS
3777 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3778 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3779 }
3780 #endif
3781
3782 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3783 Klass* k = vmClasses::box_klass(type);
3784 if (k == nullptr) return nullptr;
3785 InstanceKlass* ik = InstanceKlass::cast(k);
3786 if (!ik->is_initialized()) {
3787 ik->initialize(CHECK_NULL);
3788 }
3789 return ik->allocate_instance(THREAD);
3790 }
3791
3792
3793 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3794 oop box = initialize_and_allocate(type, CHECK_NULL);
3795 if (box == nullptr) return nullptr;
3796 switch (type) {
3797 case T_BOOLEAN:
3798 box->bool_field_put(_value_offset, value->z);
3799 break;
3800 case T_CHAR:
3801 box->char_field_put(_value_offset, value->c);
3802 break;
3803 case T_FLOAT:
3804 box->float_field_put(_value_offset, value->f);
3805 break;
3806 case T_DOUBLE:
3807 box->double_field_put(_long_value_offset, value->d);
3808 break;
3809 case T_BYTE:
3810 box->byte_field_put(_value_offset, value->b);
3811 break;
3812 case T_SHORT:
3813 box->short_field_put(_value_offset, value->s);
3814 break;
3815 case T_INT:
3816 box->int_field_put(_value_offset, value->i);
3817 break;
3818 case T_LONG:
3819 box->long_field_put(_long_value_offset, value->j);
3820 break;
3821 default:
3822 return nullptr;
3823 }
3824 return box;
3825 }
3826
3827
3828 BasicType java_lang_boxing_object::basic_type(oop box) {
3829 if (box == nullptr) return T_ILLEGAL;
3830 BasicType type = vmClasses::box_klass_type(box->klass());
3831 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3832 return T_ILLEGAL;
3833 return type;
3834 }
3835
3836
3837 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3838 BasicType type = vmClasses::box_klass_type(box->klass());
3839 switch (type) {
3840 case T_BOOLEAN:
3841 value->z = box->bool_field(_value_offset);
3842 break;
3843 case T_CHAR:
3844 value->c = box->char_field(_value_offset);
3845 break;
3846 case T_FLOAT:
3847 value->f = box->float_field(_value_offset);
3848 break;
3849 case T_DOUBLE:
3850 value->d = box->double_field(_long_value_offset);
3851 break;
3852 case T_BYTE:
3853 value->b = box->byte_field(_value_offset);
3854 break;
3855 case T_SHORT:
3856 value->s = box->short_field(_value_offset);
3857 break;
3858 case T_INT:
3859 value->i = box->int_field(_value_offset);
3860 break;
3861 case T_LONG:
3862 value->j = box->long_field(_long_value_offset);
3863 break;
3864 default:
3865 return T_ILLEGAL;
3866 } // end switch
3867 return type;
3868 }
3869
3870
3871 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3872 BasicType type = vmClasses::box_klass_type(box->klass());
3873 switch (type) {
3874 case T_BOOLEAN:
3875 box->bool_field_put(_value_offset, value->z);
3876 break;
3877 case T_CHAR:
3878 box->char_field_put(_value_offset, value->c);
3879 break;
3880 case T_FLOAT:
3881 box->float_field_put(_value_offset, value->f);
3882 break;
3883 case T_DOUBLE:
3884 box->double_field_put(_long_value_offset, value->d);
3885 break;
3886 case T_BYTE:
3887 box->byte_field_put(_value_offset, value->b);
3888 break;
3889 case T_SHORT:
3890 box->short_field_put(_value_offset, value->s);
3891 break;
3892 case T_INT:
3893 box->int_field_put(_value_offset, value->i);
3894 break;
3895 case T_LONG:
3896 box->long_field_put(_long_value_offset, value->j);
3897 break;
3898 default:
3899 return T_ILLEGAL;
3900 } // end switch
3901 return type;
3902 }
3903
3904
3905 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3906 switch (type) {
3907 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3908 case T_CHAR: st->print("%d", value->c); break;
3909 case T_BYTE: st->print("%d", value->b); break;
3910 case T_SHORT: st->print("%d", value->s); break;
3911 case T_INT: st->print("%d", value->i); break;
3912 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3913 case T_FLOAT: st->print("%f", value->f); break;
3914 case T_DOUBLE: st->print("%lf", value->d); break;
3915 default: st->print("type %d?", type); break;
3916 }
3917 }
3918
3919
3920 // Support for java_lang_ref_SoftReference
3921 //
3922
3923 int java_lang_ref_SoftReference::_timestamp_offset;
3924 int java_lang_ref_SoftReference::_static_clock_offset;
3925
3926 #define SOFTREFERENCE_FIELDS_DO(macro) \
3927 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
3928 macro(_static_clock_offset, k, "clock", long_signature, true)
3929
3930 void java_lang_ref_SoftReference::compute_offsets() {
3931 InstanceKlass* k = vmClasses::SoftReference_klass();
3932 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3933 }
3934
3935 #if INCLUDE_CDS
3936 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3937 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3938 }
3939 #endif
3940
3941 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3942 return ref->long_field(_timestamp_offset);
3943 }
3944
3945 jlong java_lang_ref_SoftReference::clock() {
3946 InstanceKlass* ik = vmClasses::SoftReference_klass();
3947 oop base = ik->static_field_base_raw();
3948 return base->long_field(_static_clock_offset);
3949 }
3950
3951 void java_lang_ref_SoftReference::set_clock(jlong value) {
3952 InstanceKlass* ik = vmClasses::SoftReference_klass();
3953 oop base = ik->static_field_base_raw();
3954 base->long_field_put(_static_clock_offset, value);
3955 }
3956
3957 // Support for java_lang_invoke_DirectMethodHandle
3958
3959 int java_lang_invoke_DirectMethodHandle::_member_offset;
3960
3961 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3962 oop member_name = nullptr;
3963 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3964 "a DirectMethodHandle oop is expected");
3965 return dmh->obj_field(_member_offset);
3966 }
3967
3968 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3969 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3970
3971 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3972 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
3973 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3974 }
3975
3976 #if INCLUDE_CDS
3977 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3978 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3979 }
3980 #endif
3981
3982 // Support for java_lang_invoke_MethodHandle
3983
3984 int java_lang_invoke_MethodHandle::_type_offset;
3985 int java_lang_invoke_MethodHandle::_form_offset;
3986
3987 int java_lang_invoke_MemberName::_clazz_offset;
3988 int java_lang_invoke_MemberName::_name_offset;
3989 int java_lang_invoke_MemberName::_type_offset;
3990 int java_lang_invoke_MemberName::_flags_offset;
3991 int java_lang_invoke_MemberName::_method_offset;
3992 int java_lang_invoke_MemberName::_vmindex_offset;
3993
3994 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3995 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3996
3997 int java_lang_invoke_LambdaForm::_vmentry_offset;
3998
3999 #define METHODHANDLE_FIELDS_DO(macro) \
4000 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4001 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4002
4003 void java_lang_invoke_MethodHandle::compute_offsets() {
4004 InstanceKlass* k = vmClasses::MethodHandle_klass();
4005 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4006 }
4007
4008 #if INCLUDE_CDS
4009 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4010 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4011 }
4012 #endif
4013
4014 #define MEMBERNAME_FIELDS_DO(macro) \
4015 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4016 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4017 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4018 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4019 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4020
4021 void java_lang_invoke_MemberName::compute_offsets() {
4022 InstanceKlass* k = vmClasses::MemberName_klass();
4023 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4024 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4025 }
4026
4027 #if INCLUDE_CDS
4028 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4029 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4030 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4031 }
4032 #endif
4033
4034 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4035 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4036 assert(k != nullptr, "jdk mismatch");
4037 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4038 }
4039
4040 #if INCLUDE_CDS
4041 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4042 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4043 }
4044 #endif
4045
4046 #define LAMBDAFORM_FIELDS_DO(macro) \
4047 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4048
4049 void java_lang_invoke_LambdaForm::compute_offsets() {
4050 InstanceKlass* k = vmClasses::LambdaForm_klass();
4051 assert (k != nullptr, "jdk mismatch");
4052 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4053 }
4054
4055 #if INCLUDE_CDS
4056 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4057 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4058 }
4059 #endif
4060
4061 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4062 return obj != nullptr && is_subclass(obj->klass());
4063 }
4064
4065 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4066 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4067
4068 #define NEP_FIELDS_DO(macro) \
4069 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4070 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4071
4072 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4073 return obj != nullptr && is_subclass(obj->klass());
4074 }
4075
4076 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4077 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4078 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4079 }
4080
4081 #if INCLUDE_CDS
4082 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4083 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4084 }
4085 #endif
4086
4087 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4088 return entry->obj_field(_method_type_offset);
4089 }
4090
4091 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4092 return entry->long_field(_downcall_stub_address_offset);
4093 }
4094
4095 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4096 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4097 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4098 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4099 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4100 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4101 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4102
4103 #define ABIDescriptor_FIELDS_DO(macro) \
4104 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4105 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4106 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4107 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4108 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4109 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4110 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4111
4112 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4113 return obj != nullptr && is_subclass(obj->klass());
4114 }
4115
4116 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4117 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4118 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4119 }
4120
4121 #if INCLUDE_CDS
4122 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4123 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4124 }
4125 #endif
4126
4127 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4128 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4129 }
4130
4131 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4132 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4133 }
4134
4135 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4136 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4137 }
4138
4139 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4140 return entry->int_field(_stackAlignment_offset);
4141 }
4142
4143 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4144 return entry->int_field(_shadowSpace_offset);
4145 }
4146
4147 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4148 return entry->obj_field(_scratch1_offset);
4149 }
4150
4151 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4152 return entry->obj_field(_scratch2_offset);
4153 }
4154
4155 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4156 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4157 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4158 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4159
4160 #define VMStorage_FIELDS_DO(macro) \
4161 macro(_type_offset, k, "type", byte_signature, false); \
4162 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4163 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4164 macro(_debugName_offset, k, "debugName", string_signature, false); \
4165
4166 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4167 return obj != nullptr && is_subclass(obj->klass());
4168 }
4169
4170 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4171 InstanceKlass* k = vmClasses::VMStorage_klass();
4172 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4173 }
4174
4175 #if INCLUDE_CDS
4176 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4177 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4178 }
4179 #endif
4180
4181 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4182 return entry->byte_field(_type_offset);
4183 }
4184
4185 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4186 return entry->int_field(_indexOrOffset_offset);
4187 }
4188
4189 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4190 return entry->short_field(_segmentMaskOrSize_offset);
4191 }
4192
4193 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4194 return entry->obj_field(_debugName_offset);
4195 }
4196
4197 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4198 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4199
4200 #define CallConv_FIELDS_DO(macro) \
4201 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4202 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4203
4204 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4205 return obj != nullptr && is_subclass(obj->klass());
4206 }
4207
4208 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4209 InstanceKlass* k = vmClasses::CallConv_klass();
4210 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4211 }
4212
4213 #if INCLUDE_CDS
4214 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4215 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4216 }
4217 #endif
4218
4219 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4220 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4221 }
4222
4223 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4224 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4225 }
4226
4227 oop java_lang_invoke_MethodHandle::type(oop mh) {
4228 return mh->obj_field(_type_offset);
4229 }
4230
4231 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4232 mh->obj_field_put(_type_offset, mtype);
4233 }
4234
4235 oop java_lang_invoke_MethodHandle::form(oop mh) {
4236 assert(_form_offset != 0, "");
4237 return mh->obj_field(_form_offset);
4238 }
4239
4240 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4241 assert(_form_offset != 0, "");
4242 mh->obj_field_put(_form_offset, lform);
4243 }
4244
4245 /// MemberName accessors
4246
4247 oop java_lang_invoke_MemberName::clazz(oop mname) {
4248 assert(is_instance(mname), "wrong type");
4249 return mname->obj_field(_clazz_offset);
4250 }
4251
4252 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4253 assert(is_instance(mname), "wrong type");
4254 mname->obj_field_put(_clazz_offset, clazz);
4255 }
4256
4257 oop java_lang_invoke_MemberName::name(oop mname) {
4258 assert(is_instance(mname), "wrong type");
4259 return mname->obj_field(_name_offset);
4260 }
4261
4262 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4263 assert(is_instance(mname), "wrong type");
4264 mname->obj_field_put(_name_offset, name);
4265 }
4266
4267 oop java_lang_invoke_MemberName::type(oop mname) {
4268 assert(is_instance(mname), "wrong type");
4269 return mname->obj_field(_type_offset);
4270 }
4271
4272 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4273 assert(is_instance(mname), "wrong type");
4274 mname->obj_field_put(_type_offset, type);
4275 }
4276
4277 int java_lang_invoke_MemberName::flags(oop mname) {
4278 assert(is_instance(mname), "wrong type");
4279 return mname->int_field(_flags_offset);
4280 }
4281
4282 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4283 assert(is_instance(mname), "wrong type");
4284 mname->int_field_put(_flags_offset, flags);
4285 }
4286
4287
4288 // Return vmtarget from ResolvedMethodName method field through indirection
4289 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4290 assert(is_instance(mname), "wrong type");
4291 oop method = mname->obj_field(_method_offset);
4292 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4293 }
4294
4295 bool java_lang_invoke_MemberName::is_method(oop mname) {
4296 assert(is_instance(mname), "must be MemberName");
4297 return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0;
4298 }
4299
4300 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4301 assert(is_instance(mname), "wrong type");
4302 mname->obj_field_put(_method_offset, resolved_method);
4303 }
4304
4305 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4306 assert(is_instance(mname), "wrong type");
4307 return (intptr_t) mname->address_field(_vmindex_offset);
4308 }
4309
4310 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4311 assert(is_instance(mname), "wrong type");
4312 mname->address_field_put(_vmindex_offset, (address) index);
4313 }
4314
4315
4316 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4317 assert(is_instance(resolved_method), "wrong type");
4318 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4319 assert(m->is_method(), "must be");
4320 return m;
4321 }
4322
4323 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4324 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4325 assert(is_instance(resolved_method), "wrong type");
4326 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4327 }
4328
4329 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4330 assert(is_instance(resolved_method), "wrong type");
4331 resolved_method->obj_field_put(_vmholder_offset, holder);
4332 }
4333
4334 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4335 const Method* method = m();
4336
4337 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4338 oop resolved_method = ResolvedMethodTable::find_method(method);
4339 if (resolved_method != nullptr) {
4340 return resolved_method;
4341 }
4342
4343 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4344 if (!k->is_initialized()) {
4345 k->initialize(CHECK_NULL);
4346 }
4347
4348 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4349
4350 NoSafepointVerifier nsv;
4351
4352 if (method->is_old()) {
4353 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4354 method->get_new_method();
4355 }
4356
4357 InstanceKlass* holder = method->method_holder();
4358
4359 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4360 // Add a reference to the loader (actually mirror because hidden classes may not have
4361 // distinct loaders) to ensure the metadata is kept alive.
4362 // This mirror may be different than the one in clazz field.
4363 set_vmholder(new_resolved_method, holder->java_mirror());
4364
4365 // Set flag in class to indicate this InstanceKlass has entries in the table
4366 // to avoid walking table during redefinition if none of the redefined classes
4367 // have any membernames in the table.
4368 holder->set_has_resolved_methods();
4369
4370 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4371 }
4372
4373 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4374 assert(is_instance(lform), "wrong type");
4375 return lform->obj_field(_vmentry_offset);
4376 }
4377
4378
4379 // Support for java_lang_invoke_MethodType
4380
4381 int java_lang_invoke_MethodType::_rtype_offset;
4382 int java_lang_invoke_MethodType::_ptypes_offset;
4383
4384 #define METHODTYPE_FIELDS_DO(macro) \
4385 macro(_rtype_offset, k, "rtype", class_signature, false); \
4386 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4387
4388 void java_lang_invoke_MethodType::compute_offsets() {
4389 InstanceKlass* k = vmClasses::MethodType_klass();
4390 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4391 }
4392
4393 #if INCLUDE_CDS
4394 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4395 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4396 }
4397 #endif
4398
4399 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4400 st->print("(");
4401 objArrayOop pts = ptypes(mt);
4402 if (pts != nullptr) {
4403 for (int i = 0, limit = pts->length(); i < limit; i++) {
4404 java_lang_Class::print_signature(pts->obj_at(i), st);
4405 }
4406 } else {
4407 st->print("null");
4408 }
4409 st->print(")");
4410 oop rt = rtype(mt);
4411 if (rt != nullptr) {
4412 java_lang_Class::print_signature(rt, st);
4413 } else {
4414 st->print("null");
4415 }
4416 }
4417
4418 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4419 ResourceMark rm;
4420 stringStream buffer(128);
4421 print_signature(mt, &buffer);
4422 const char* sigstr = buffer.base();
4423 int siglen = (int) buffer.size();
4424 Symbol *name;
4425 if (!intern_if_not_found) {
4426 name = SymbolTable::probe(sigstr, siglen);
4427 } else {
4428 name = SymbolTable::new_symbol(sigstr, siglen);
4429 }
4430 return name;
4431 }
4432
4433 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4434 if (mt1 == mt2)
4435 return true;
4436 if (rtype(mt1) != rtype(mt2))
4437 return false;
4438 if (ptype_count(mt1) != ptype_count(mt2))
4439 return false;
4440 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4441 if (ptype(mt1, i) != ptype(mt2, i))
4442 return false;
4443 }
4444 return true;
4445 }
4446
4447 oop java_lang_invoke_MethodType::rtype(oop mt) {
4448 assert(is_instance(mt), "must be a MethodType");
4449 return mt->obj_field(_rtype_offset);
4450 }
4451
4452 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4453 assert(is_instance(mt), "must be a MethodType");
4454 return (objArrayOop) mt->obj_field(_ptypes_offset);
4455 }
4456
4457 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4458 return ptypes(mt)->obj_at(idx);
4459 }
4460
4461 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4462 return ptypes(mt)->length();
4463 }
4464
4465 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4466 objArrayOop pts = ptypes(mt);
4467 int count = pts->length();
4468 int slots = 0;
4469 for (int i = 0; i < count; i++) {
4470 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4471 slots += type2size[bt];
4472 }
4473 return slots;
4474 }
4475
4476 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4477 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4478 return type2size[bt];
4479 }
4480
4481
4482 // Support for java_lang_invoke_CallSite
4483
4484 int java_lang_invoke_CallSite::_target_offset;
4485 int java_lang_invoke_CallSite::_context_offset;
4486
4487 #define CALLSITE_FIELDS_DO(macro) \
4488 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4489 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4490
4491 void java_lang_invoke_CallSite::compute_offsets() {
4492 InstanceKlass* k = vmClasses::CallSite_klass();
4493 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4494 }
4495
4496 #if INCLUDE_CDS
4497 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4498 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4499 }
4500 #endif
4501
4502 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4503 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4504
4505 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4506 return dep_oop;
4507 }
4508
4509 // Support for java_lang_invoke_ConstantCallSite
4510
4511 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4512
4513 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4514 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4515
4516 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4517 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4518 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4519 }
4520
4521 #if INCLUDE_CDS
4522 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4523 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4524 }
4525 #endif
4526
4527 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4528
4529 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4530 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4531
4532 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4533 InstanceKlass* k = vmClasses::Context_klass();
4534 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4535 }
4536
4537 #if INCLUDE_CDS
4538 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4539 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4540 }
4541 #endif
4542
4543 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4544 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4545 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4546 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4547 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4548 return dep_ctx;
4549 }
4550
4551 // Support for java_security_AccessControlContext
4552
4553 int java_security_AccessControlContext::_context_offset;
4554 int java_security_AccessControlContext::_privilegedContext_offset;
4555 int java_security_AccessControlContext::_isPrivileged_offset;
4556 int java_security_AccessControlContext::_isAuthorized_offset;
4557
4558 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4559 macro(_context_offset, k, "context", protectiondomain_signature, false); \
4560 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4561 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
4562 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
4563
4564 void java_security_AccessControlContext::compute_offsets() {
4565 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4566 InstanceKlass* k = vmClasses::AccessControlContext_klass();
4567 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4568 }
4569
4570 #if INCLUDE_CDS
4571 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4572 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4573 }
4574 #endif
4575
4576 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4577 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4578 assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4579 // Ensure klass is initialized
4580 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4581 // Allocate result
4582 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4583 // Fill in values
4584 result->obj_field_put(_context_offset, context());
4585 result->obj_field_put(_privilegedContext_offset, privileged_context());
4586 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4587 result->bool_field_put(_isAuthorized_offset, true);
4588 return result;
4589 }
4590
4591
4592 // Support for java_lang_ClassLoader
4593
4594 int java_lang_ClassLoader::_loader_data_offset;
4595 int java_lang_ClassLoader::_parallelCapable_offset;
4596 int java_lang_ClassLoader::_name_offset;
4597 int java_lang_ClassLoader::_nameAndId_offset;
4598 int java_lang_ClassLoader::_unnamedModule_offset;
4599 int java_lang_ClassLoader::_parent_offset;
4600
4601 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4602 assert(loader != nullptr, "loader must not be null");
4603 assert(oopDesc::is_oop(loader), "loader must be oop");
4604 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4605 }
4606
4607 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4608 assert(loader != nullptr, "loader must not be null");
4609 assert(oopDesc::is_oop(loader), "loader must be oop");
4610 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4611 }
4612
4613 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4614 assert(loader != nullptr, "loader must not be null");
4615 assert(oopDesc::is_oop(loader), "loader must be oop");
4616 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4617 }
4618
4619 #define CLASSLOADER_FIELDS_DO(macro) \
4620 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4621 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4622 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4623 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4624 macro(_parent_offset, k1, "parent", classloader_signature, false)
4625
4626 void java_lang_ClassLoader::compute_offsets() {
4627 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4628 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4629
4630 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4631 }
4632
4633 #if INCLUDE_CDS
4634 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4635 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4636 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4637 }
4638 #endif
4639
4640 oop java_lang_ClassLoader::parent(oop loader) {
4641 assert(is_instance(loader), "loader must be oop");
4642 return loader->obj_field(_parent_offset);
4643 }
4644
4645 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4646 assert(is_instance(loader), "loader must be oop");
4647 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4648 }
4649
4650 // Returns the name field of this class loader. If the name field has not
4651 // been set, null will be returned.
4652 oop java_lang_ClassLoader::name(oop loader) {
4653 assert(is_instance(loader), "loader must be oop");
4654 return loader->obj_field(_name_offset);
4655 }
4656
4657 // Returns the nameAndId field of this class loader. The format is
4658 // as follows:
4659 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4660 // If the defining loader has no name then <qualified-class-name> @<id>
4661 // If built-in loader, then omit '@<id>' as there is only one instance.
4662 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4663 oop java_lang_ClassLoader::nameAndId(oop loader) {
4664 assert(is_instance(loader), "loader must be oop");
4665 return loader->obj_field(_nameAndId_offset);
4666 }
4667
4668 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4669 assert(is_instance(loader), "loader must be oop");
4670 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4671 oop acl = loader;
4672 debug_only(jint loop_count = 0);
4673 // This loop taken verbatim from ClassLoader.java:
4674 do {
4675 acl = parent(acl);
4676 if (cl == acl) {
4677 return true;
4678 }
4679 assert(++loop_count > 0, "loop_count overflow");
4680 } while (acl != nullptr);
4681 return false;
4682 }
4683
4684 bool java_lang_ClassLoader::is_instance(oop obj) {
4685 return obj != nullptr && is_subclass(obj->klass());
4686 }
4687
4688
4689 // For class loader classes, parallelCapable defined
4690 // based on non-null field
4691 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4692 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4693 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4694 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4695 }
4696
4697 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4698 // Fix for 4474172; see evaluation for more details
4699 loader = non_reflection_class_loader(loader);
4700
4701 oop cl = SystemDictionary::java_system_loader();
4702 while(cl != nullptr) {
4703 if (cl == loader) return true;
4704 cl = parent(cl);
4705 }
4706 return false;
4707 }
4708
4709 // Return true if this is one of the class loaders associated with
4710 // the generated bytecodes for reflection.
4711 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4712 if (loader != nullptr) {
4713 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass();
4714 // This might be null in non-1.4 JDKs
4715 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class));
4716 }
4717 return false;
4718 }
4719
4720 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4721 // See whether this is one of the class loaders associated with
4722 // the generated bytecodes for reflection, and if so, "magically"
4723 // delegate to its parent to prevent class loading from occurring
4724 // in places where applications using reflection didn't expect it.
4725 if (is_reflection_class_loader(loader)) {
4726 return parent(loader);
4727 }
4728 return loader;
4729 }
4730
4731 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4732 assert(is_instance(loader), "loader must be oop");
4733 return loader->obj_field(_unnamedModule_offset);
4734 }
4735
4736 // Support for java_lang_System
4737 //
4738
4739 int java_lang_System::_static_in_offset;
4740 int java_lang_System::_static_out_offset;
4741 int java_lang_System::_static_err_offset;
4742 int java_lang_System::_static_security_offset;
4743 int java_lang_System::_static_allow_security_offset;
4744 int java_lang_System::_static_never_offset;
4745
4746 #define SYSTEM_FIELDS_DO(macro) \
4747 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4748 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4749 macro(_static_err_offset, k, "err", print_stream_signature, true); \
4750 macro(_static_security_offset, k, "security", security_manager_signature, true); \
4751 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4752 macro(_static_never_offset, k, "NEVER", int_signature, true)
4753
4754 void java_lang_System::compute_offsets() {
4755 InstanceKlass* k = vmClasses::System_klass();
4756 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4757 }
4758
4759 // This field tells us that a security manager can never be installed so we
4760 // can completely skip populating the ProtectionDomainCacheTable.
4761 bool java_lang_System::allow_security_manager() {
4762 static int initialized = false;
4763 static bool allowed = true; // default
4764 if (!initialized) {
4765 oop base = vmClasses::System_klass()->static_field_base_raw();
4766 int never = base->int_field(_static_never_offset);
4767 allowed = (base->int_field(_static_allow_security_offset) != never);
4768 initialized = true;
4769 }
4770 return allowed;
4771 }
4772
4773 // This field tells us that a security manager is installed.
4774 bool java_lang_System::has_security_manager() {
4775 oop base = vmClasses::System_klass()->static_field_base_raw();
4776 return base->obj_field(_static_security_offset) != nullptr;
4777 }
4778
4779 #if INCLUDE_CDS
4780 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4781 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4782 }
4783 #endif
4784
4785 // Support for jdk_internal_misc_UnsafeConstants
4786 //
4787 class UnsafeConstantsFixup : public FieldClosure {
4788 private:
4789 int _address_size;
4790 int _page_size;
4791 bool _big_endian;
4792 bool _use_unaligned_access;
4793 int _data_cache_line_flush_size;
4794 public:
4795 UnsafeConstantsFixup() {
4796 // round up values for all static final fields
4797 _address_size = sizeof(void*);
4798 _page_size = (int)os::vm_page_size();
4799 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4800 _use_unaligned_access = UseUnalignedAccesses;
4801 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4802 }
4803
4804 void do_field(fieldDescriptor* fd) {
4805 oop mirror = fd->field_holder()->java_mirror();
4806 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4807 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4808 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4809 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4810 if (fd->name() == vmSymbols::address_size_name()) {
4811 mirror->int_field_put(fd->offset(), _address_size);
4812 } else if (fd->name() == vmSymbols::page_size_name()) {
4813 mirror->int_field_put(fd->offset(), _page_size);
4814 } else if (fd->name() == vmSymbols::big_endian_name()) {
4815 mirror->bool_field_put(fd->offset(), _big_endian);
4816 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4817 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4818 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4819 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4820 } else {
4821 assert(false, "unexpected UnsafeConstants field");
4822 }
4823 }
4824 };
4825
4826 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4827 UnsafeConstantsFixup fixup;
4828 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4829 }
4830
4831
4832 // java_lang_StackTraceElement
4833
4834 int java_lang_StackTraceElement::_methodName_offset;
4835 int java_lang_StackTraceElement::_fileName_offset;
4836 int java_lang_StackTraceElement::_lineNumber_offset;
4837 int java_lang_StackTraceElement::_moduleName_offset;
4838 int java_lang_StackTraceElement::_moduleVersion_offset;
4839 int java_lang_StackTraceElement::_classLoaderName_offset;
4840 int java_lang_StackTraceElement::_declaringClass_offset;
4841 int java_lang_StackTraceElement::_declaringClassObject_offset;
4842
4843 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4844 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4845 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4846 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4847 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4848 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4849 macro(_methodName_offset, k, "methodName", string_signature, false); \
4850 macro(_fileName_offset, k, "fileName", string_signature, false); \
4851 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4852
4853 // Support for java_lang_StackTraceElement
4854 void java_lang_StackTraceElement::compute_offsets() {
4855 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4856 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4857 }
4858
4859 #if INCLUDE_CDS
4860 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4861 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4862 }
4863 #endif
4864
4865 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4866 element->obj_field_put(_fileName_offset, value);
4867 }
4868
4869 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4870 element->obj_field_put(_declaringClass_offset, value);
4871 }
4872
4873 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4874 element->obj_field_put(_methodName_offset, value);
4875 }
4876
4877 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4878 element->int_field_put(_lineNumber_offset, value);
4879 }
4880
4881 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4882 element->obj_field_put(_moduleName_offset, value);
4883 }
4884
4885 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4886 element->obj_field_put(_moduleVersion_offset, value);
4887 }
4888
4889 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4890 element->obj_field_put(_classLoaderName_offset, value);
4891 }
4892
4893 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4894 element->obj_field_put(_declaringClassObject_offset, value);
4895 }
4896
4897
4898 // java_lang_AssertionStatusDirectives
4899
4900 int java_lang_AssertionStatusDirectives::_classes_offset;
4901 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4902 int java_lang_AssertionStatusDirectives::_packages_offset;
4903 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4904 int java_lang_AssertionStatusDirectives::_deflt_offset;
4905
4906 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4907 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4908 macro(_classes_offset, k, "classes", string_array_signature, false); \
4909 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4910 macro(_packages_offset, k, "packages", string_array_signature, false); \
4911 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4912 macro(_deflt_offset, k, "deflt", bool_signature, false)
4913
4914 void java_lang_AssertionStatusDirectives::compute_offsets() {
4915 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
4916 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4917 }
4918
4919 #if INCLUDE_CDS
4920 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4921 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4922 }
4923 #endif
4924
4925 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4926 o->obj_field_put(_classes_offset, val);
4927 }
4928
4929 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4930 o->obj_field_put(_classEnabled_offset, val);
4931 }
4932
4933 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4934 o->obj_field_put(_packages_offset, val);
4935 }
4936
4937 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4938 o->obj_field_put(_packageEnabled_offset, val);
4939 }
4940
4941 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4942 o->bool_field_put(_deflt_offset, val);
4943 }
4944
4945 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4946
4947 #define AOS_FIELDS_DO(macro) \
4948 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4949
4950 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4951 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4952 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4953 }
4954
4955 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4956 assert(_owner_offset != 0, "Must be initialized");
4957 return obj->obj_field(_owner_offset);
4958 }
4959
4960 #if INCLUDE_CDS
4961 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4962 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4963 }
4964 #endif
4965
4966 int vector_VectorPayload::_payload_offset;
4967
4968 #define VECTORPAYLOAD_FIELDS_DO(macro) \
4969 macro(_payload_offset, k, "payload", object_signature, false)
4970
4971 void vector_VectorPayload::compute_offsets() {
4972 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
4973 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4974 }
4975
4976 #if INCLUDE_CDS
4977 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
4978 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4979 }
4980 #endif
4981
4982 void vector_VectorPayload::set_payload(oop o, oop val) {
4983 o->obj_field_put(_payload_offset, val);
4984 }
4985
4986 bool vector_VectorPayload::is_instance(oop obj) {
4987 return obj != nullptr && is_subclass(obj->klass());
4988 }
4989
4990 int java_lang_Integer_IntegerCache::_static_cache_offset;
4991 int java_lang_Long_LongCache::_static_cache_offset;
4992 int java_lang_Character_CharacterCache::_static_cache_offset;
4993 int java_lang_Short_ShortCache::_static_cache_offset;
4994 int java_lang_Byte_ByteCache::_static_cache_offset;
4995
4996 #define INTEGER_CACHE_FIELDS_DO(macro) \
4997 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4998
4999 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5000 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5001 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5002 }
5003
5004 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5005 oop base = ik->static_field_base_raw();
5006 return objArrayOop(base->obj_field(_static_cache_offset));
5007 }
5008
5009 Symbol* java_lang_Integer_IntegerCache::symbol() {
5010 return vmSymbols::java_lang_Integer_IntegerCache();
5011 }
5012
5013 #if INCLUDE_CDS
5014 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5015 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5016 }
5017 #endif
5018 #undef INTEGER_CACHE_FIELDS_DO
5019
5020 jint java_lang_Integer::value(oop obj) {
5021 jvalue v;
5022 java_lang_boxing_object::get_value(obj, &v);
5023 return v.i;
5024 }
5025
5026 #define LONG_CACHE_FIELDS_DO(macro) \
5027 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5028
5029 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5030 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5031 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5032 }
5033
5034 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5035 oop base = ik->static_field_base_raw();
5036 return objArrayOop(base->obj_field(_static_cache_offset));
5037 }
5038
5039 Symbol* java_lang_Long_LongCache::symbol() {
5040 return vmSymbols::java_lang_Long_LongCache();
5041 }
5042
5043 #if INCLUDE_CDS
5044 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5045 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5046 }
5047 #endif
5048 #undef LONG_CACHE_FIELDS_DO
5049
5050 jlong java_lang_Long::value(oop obj) {
5051 jvalue v;
5052 java_lang_boxing_object::get_value(obj, &v);
5053 return v.j;
5054 }
5055
5056 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5057 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5058
5059 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5060 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5061 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5062 }
5063
5064 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5065 oop base = ik->static_field_base_raw();
5066 return objArrayOop(base->obj_field(_static_cache_offset));
5067 }
5068
5069 Symbol* java_lang_Character_CharacterCache::symbol() {
5070 return vmSymbols::java_lang_Character_CharacterCache();
5071 }
5072
5073 #if INCLUDE_CDS
5074 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5075 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5076 }
5077 #endif
5078 #undef CHARACTER_CACHE_FIELDS_DO
5079
5080 jchar java_lang_Character::value(oop obj) {
5081 jvalue v;
5082 java_lang_boxing_object::get_value(obj, &v);
5083 return v.c;
5084 }
5085
5086 #define SHORT_CACHE_FIELDS_DO(macro) \
5087 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5088
5089 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5090 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5091 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5092 }
5093
5094 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5095 oop base = ik->static_field_base_raw();
5096 return objArrayOop(base->obj_field(_static_cache_offset));
5097 }
5098
5099 Symbol* java_lang_Short_ShortCache::symbol() {
5100 return vmSymbols::java_lang_Short_ShortCache();
5101 }
5102
5103 #if INCLUDE_CDS
5104 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5105 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5106 }
5107 #endif
5108 #undef SHORT_CACHE_FIELDS_DO
5109
5110 jshort java_lang_Short::value(oop obj) {
5111 jvalue v;
5112 java_lang_boxing_object::get_value(obj, &v);
5113 return v.s;
5114 }
5115
5116 #define BYTE_CACHE_FIELDS_DO(macro) \
5117 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5118
5119 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5120 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5121 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5122 }
5123
5124 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5125 oop base = ik->static_field_base_raw();
5126 return objArrayOop(base->obj_field(_static_cache_offset));
5127 }
5128
5129 Symbol* java_lang_Byte_ByteCache::symbol() {
5130 return vmSymbols::java_lang_Byte_ByteCache();
5131 }
5132
5133 #if INCLUDE_CDS
5134 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5135 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5136 }
5137 #endif
5138 #undef BYTE_CACHE_FIELDS_DO
5139
5140 jbyte java_lang_Byte::value(oop obj) {
5141 jvalue v;
5142 java_lang_boxing_object::get_value(obj, &v);
5143 return v.b;
5144 }
5145
5146 int java_lang_Boolean::_static_TRUE_offset;
5147 int java_lang_Boolean::_static_FALSE_offset;
5148
5149 #define BOOLEAN_FIELDS_DO(macro) \
5150 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5151 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5152
5153
5154 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5155 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5156 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5157 }
5158
5159 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5160 oop base = ik->static_field_base_raw();
5161 return base->obj_field(_static_TRUE_offset);
5162 }
5163
5164 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5165 oop base = ik->static_field_base_raw();
5166 return base->obj_field(_static_FALSE_offset);
5167 }
5168
5169 Symbol* java_lang_Boolean::symbol() {
5170 return vmSymbols::java_lang_Boolean();
5171 }
5172
5173 #if INCLUDE_CDS
5174 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5175 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5176 }
5177 #endif
5178 #undef BOOLEAN_CACHE_FIELDS_DO
5179
5180 jboolean java_lang_Boolean::value(oop obj) {
5181 jvalue v;
5182 java_lang_boxing_object::get_value(obj, &v);
5183 return v.z;
5184 }
5185
5186 // java_lang_reflect_RecordComponent
5187
5188 int java_lang_reflect_RecordComponent::_clazz_offset;
5189 int java_lang_reflect_RecordComponent::_name_offset;
5190 int java_lang_reflect_RecordComponent::_type_offset;
5191 int java_lang_reflect_RecordComponent::_accessor_offset;
5192 int java_lang_reflect_RecordComponent::_signature_offset;
5193 int java_lang_reflect_RecordComponent::_annotations_offset;
5194 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5195
5196 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5197 macro(_clazz_offset, k, "clazz", class_signature, false); \
5198 macro(_name_offset, k, "name", string_signature, false); \
5199 macro(_type_offset, k, "type", class_signature, false); \
5200 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5201 macro(_signature_offset, k, "signature", string_signature, false); \
5202 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5203 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5204
5205 // Support for java_lang_reflect_RecordComponent
5206 void java_lang_reflect_RecordComponent::compute_offsets() {
5207 InstanceKlass* k = vmClasses::RecordComponent_klass();
5208 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5209 }
5210
5211 #if INCLUDE_CDS
5212 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5213 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5214 }
5215 #endif
5216
5217 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5218 element->obj_field_put(_clazz_offset, value);
5219 }
5220
5221 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5222 element->obj_field_put(_name_offset, value);
5223 }
5224
5225 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5226 element->obj_field_put(_type_offset, value);
5227 }
5228
5229 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5230 element->obj_field_put(_accessor_offset, value);
5231 }
5232
5233 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5234 element->obj_field_put(_signature_offset, value);
5235 }
5236
5237 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5238 element->obj_field_put(_annotations_offset, value);
5239 }
5240
5241 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5242 element->obj_field_put(_typeAnnotations_offset, value);
5243 }
5244
5245 // java_lang_InternalError
5246 int java_lang_InternalError::_during_unsafe_access_offset;
5247
5248 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5249 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5250 }
5251
5252 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5253 return internal_error->bool_field(_during_unsafe_access_offset);
5254 }
5255
5256 void java_lang_InternalError::compute_offsets() {
5257 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5258 }
5259
5260 #if INCLUDE_CDS
5261 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5262 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5263 }
5264 #endif
5265
5266 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5267 f(java_lang_Class) \
5268 f(java_lang_String) \
5269 f(java_lang_ref_Reference) \
5270 //end
5271
5272 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5273 f(java_lang_System) \
5274 f(java_lang_ClassLoader) \
5275 f(java_lang_Throwable) \
5276 f(java_lang_Thread) \
5277 f(java_lang_Thread_FieldHolder) \
5278 f(java_lang_Thread_Constants) \
5279 f(java_lang_ThreadGroup) \
5280 f(java_lang_VirtualThread) \
5281 f(java_lang_InternalError) \
5282 f(java_lang_AssertionStatusDirectives) \
5283 f(java_lang_ref_SoftReference) \
5284 f(java_lang_invoke_MethodHandle) \
5285 f(java_lang_invoke_DirectMethodHandle) \
5286 f(java_lang_invoke_MemberName) \
5287 f(java_lang_invoke_ResolvedMethodName) \
5288 f(java_lang_invoke_LambdaForm) \
5289 f(java_lang_invoke_MethodType) \
5290 f(java_lang_invoke_CallSite) \
5291 f(java_lang_invoke_ConstantCallSite) \
5292 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5293 f(java_security_AccessControlContext) \
5294 f(java_lang_reflect_AccessibleObject) \
5295 f(java_lang_reflect_Method) \
5296 f(java_lang_reflect_Constructor) \
5297 f(java_lang_reflect_Field) \
5298 f(java_lang_reflect_RecordComponent) \
5299 f(reflect_ConstantPool) \
5300 f(reflect_UnsafeStaticFieldAccessorImpl) \
5301 f(java_lang_reflect_Parameter) \
5302 f(java_lang_Module) \
5303 f(java_lang_StackTraceElement) \
5304 f(java_lang_StackFrameInfo) \
5305 f(java_lang_LiveStackFrameInfo) \
5306 f(jdk_internal_vm_ContinuationScope) \
5307 f(jdk_internal_vm_Continuation) \
5308 f(jdk_internal_vm_StackChunk) \
5309 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5310 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5311 f(jdk_internal_foreign_abi_ABIDescriptor) \
5312 f(jdk_internal_foreign_abi_VMStorage) \
5313 f(jdk_internal_foreign_abi_CallConv) \
5314 f(jdk_internal_misc_UnsafeConstants) \
5315 f(java_lang_boxing_object) \
5316 f(vector_VectorPayload) \
5317 //end
5318
5319 #define BASIC_JAVA_CLASSES_DO(f) \
5320 BASIC_JAVA_CLASSES_DO_PART1(f) \
5321 BASIC_JAVA_CLASSES_DO_PART2(f)
5322
5323 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5324
5325 // Compute field offsets of all the classes in this file
5326 void JavaClasses::compute_offsets() {
5327 if (UseSharedSpaces) {
5328 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5329 JvmtiExport::has_early_class_hook_env()),
5330 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5331 // None of the classes used by the rest of this function can be replaced by
5332 // JVMTI ClassFileLoadHook.
5333 // We are safe to use the archived offsets, which have already been restored
5334 // by JavaClasses::serialize_offsets, without computing the offsets again.
5335 return;
5336 }
5337
5338 // We have already called the compute_offsets() of the
5339 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5340 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5341 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5342 }
5343
5344 #if INCLUDE_CDS
5345 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5346
5347 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5348 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5349 }
5350 #endif
5351
5352 #if INCLUDE_CDS_JAVA_HEAP
5353 bool JavaClasses::is_supported_for_archiving(oop obj) {
5354 Klass* klass = obj->klass();
5355
5356 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed.
5357 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5358 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5359 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5360 // So for now we cannot not support these classes for archiving.
5361 //
5362 // These objects typically are not referenced by static fields, but rather by resolved
5363 // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5364 klass == vmClasses::ResolvedMethodName_klass() ||
5365 klass == vmClasses::MemberName_klass() ||
5366 klass == vmClasses::Context_klass() ||
5367 // It's problematic to archive Reference objects. One of the reasons is that
5368 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5369 klass->is_subclass_of(vmClasses::Reference_klass())) {
5370 return false;
5371 }
5372
5373 return true;
5374 }
5375 #endif
5376
5377 #ifndef PRODUCT
5378
5379 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5380
5381 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5382 const char* field_sig) {
5383 EXCEPTION_MARK;
5384 fieldDescriptor fd;
5385 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5386 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5387 InstanceKlass* ik = InstanceKlass::cast(k);
5388 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5389 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5390 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5391 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5392 return false;
5393 }
5394 if (fd.is_static()) {
5395 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5396 return false;
5397 }
5398 if (fd.offset() == deserialized_offset ) {
5399 return true;
5400 } else {
5401 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5402 klass_name, field_name, deserialized_offset, fd.offset());
5403 return false;
5404 }
5405 }
5406
5407 void JavaClasses::check_offsets() {
5408 bool valid = true;
5409
5410 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5411 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5412
5413 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5414 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5415
5416 // Boxed primitive objects (java_lang_boxing_object)
5417
5418 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5419 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5420 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5421 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5422 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5423 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5424 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5425 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5426
5427 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5428 }
5429
5430 #endif // PRODUCT
5431
5432 int InjectedField::compute_offset() {
5433 InstanceKlass* ik = InstanceKlass::cast(klass());
5434 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5435 if (!may_be_java && !fs.field_flags().is_injected()) {
5436 // Only look at injected fields
5437 continue;
5438 }
5439 if (fs.name() == name() && fs.signature() == signature()) {
5440 return fs.offset();
5441 }
5442 }
5443 ResourceMark rm;
5444 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)" : "");
5445 #ifndef PRODUCT
5446 ik->print();
5447 tty->print_cr("all fields:");
5448 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5449 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5450 }
5451 #endif //PRODUCT
5452 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5453 return -1;
5454 }
5455
5456 void javaClasses_init() {
5457 JavaClasses::compute_offsets();
5458 JavaClasses::check_offsets();
5459 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5460 }