1 /*
2 * Copyright (c) 1997, 2025, 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 "cds/archiveBuilder.hpp"
26 #include "cds/archiveHeapLoader.hpp"
27 #include "cds/cdsConfig.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/instanceKlass.inline.hpp"
56 #include "oops/instanceMirrorKlass.hpp"
57 #include "oops/klass.hpp"
58 #include "oops/klass.inline.hpp"
59 #include "oops/method.inline.hpp"
60 #include "oops/objArrayKlass.hpp"
61 #include "oops/objArrayOop.inline.hpp"
62 #include "oops/oopCast.inline.hpp"
63 #include "oops/oop.inline.hpp"
64 #include "oops/symbol.hpp"
65 #include "oops/recordComponent.hpp"
66 #include "oops/typeArrayOop.inline.hpp"
67 #include "prims/jvmtiExport.hpp"
68 #include "prims/jvmtiThreadState.hpp" // for JvmtiVTMSTransitionDisabler
69 #include "prims/methodHandles.hpp"
70 #include "prims/resolvedMethodTable.hpp"
71 #include "runtime/continuationEntry.inline.hpp"
72 #include "runtime/continuationJavaClasses.inline.hpp"
73 #include "runtime/fieldDescriptor.inline.hpp"
74 #include "runtime/frame.inline.hpp"
75 #include "runtime/handles.inline.hpp"
76 #include "runtime/handshake.hpp"
77 #include "runtime/init.hpp"
78 #include "runtime/interfaceSupport.inline.hpp"
79 #include "runtime/java.hpp"
80 #include "runtime/javaCalls.hpp"
81 #include "runtime/javaThread.hpp"
82 #include "runtime/jniHandles.inline.hpp"
83 #include "runtime/reflectionUtils.hpp"
84 #include "runtime/safepoint.hpp"
85 #include "runtime/safepointVerifiers.hpp"
86 #include "runtime/synchronizer.inline.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/globalDefinitions.hpp"
92 #include "utilities/growableArray.hpp"
93 #include "utilities/preserveException.hpp"
94 #include "utilities/utf8.hpp"
95 #if INCLUDE_JVMCI
96 #include "jvmci/jvmciJavaClasses.hpp"
97 #endif
98
99 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
100 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
101
102 InjectedField JavaClasses::_injected_fields[] = {
103 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
104 };
105
106 // Register native methods of Object
107 void java_lang_Object::register_natives(TRAPS) {
108 InstanceKlass* obj = vmClasses::Object_klass();
109 Method::register_native(obj, vmSymbols::hashCode_name(),
110 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
111 Method::register_native(obj, vmSymbols::wait_name(),
112 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
113 Method::register_native(obj, vmSymbols::notify_name(),
114 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
115 Method::register_native(obj, vmSymbols::notifyAll_name(),
116 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
117 Method::register_native(obj, vmSymbols::clone_name(),
118 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
119 }
120
121 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
122 return _injected_fields[(int)id].compute_offset();
123 }
124
125 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
126 *field_count = 0;
127
128 vmSymbolID sid = vmSymbols::find_sid(class_name);
129 if (sid == vmSymbolID::NO_SID) {
130 // Only well known classes can inject fields
131 return nullptr;
132 }
133
134 int count = 0;
135 int start = -1;
136
137 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
138 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
139 count++; \
140 if (start == -1) { \
141 start = (int)InjectedFieldID::klass##_##name##_enum; \
142 } \
143 }
144 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
145 #undef LOOKUP_INJECTED_FIELD
146
147 if (start != -1) {
148 *field_count = count;
149 return _injected_fields + start;
150 }
151 return nullptr;
152 }
153
154
155 // Helpful routine for computing field offsets at run time rather than hardcoding them
156 // Finds local fields only, including static fields. Static field offsets are from the
157 // beginning of the mirror.
158 void JavaClasses::compute_offset(int &dest_offset,
159 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
160 bool is_static) {
161 fieldDescriptor fd;
162 if (ik == nullptr) {
163 ResourceMark rm;
164 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
165 vm_exit_during_initialization("Invalid layout of well-known class");
166 }
167
168 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
169 ResourceMark rm;
170 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
171 name_symbol->as_C_string(), signature_symbol->as_C_string());
172 #ifndef PRODUCT
173 // Prints all fields and offsets
174 Log(class) lt;
175 LogStream ls(lt.error());
176 ik->print_on(&ls);
177 #endif //PRODUCT
178 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
179 }
180 dest_offset = fd.offset();
181 }
182
183 // Overloading to pass name as a string.
184 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
185 const char* name_string, Symbol* signature_symbol,
186 bool is_static) {
187 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
188 if (name == nullptr) {
189 ResourceMark rm;
190 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
191 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
192 }
193 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
194 }
195
196 // java_lang_String
197
198 int java_lang_String::_value_offset;
199 int java_lang_String::_hash_offset;
200 int java_lang_String::_hashIsZero_offset;
201 int java_lang_String::_coder_offset;
202 int java_lang_String::_flags_offset;
203
204 bool java_lang_String::_initialized;
205
206
207 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
208 uint8_t* addr = flags_addr(java_string);
209 uint8_t value = Atomic::load(addr);
210 while ((value & flag_mask) == 0) {
211 uint8_t old_value = value;
212 value |= flag_mask;
213 value = Atomic::cmpxchg(addr, old_value, value);
214 if (value == old_value) return false; // Flag bit changed from 0 to 1.
215 }
216 return true; // Flag bit is already 1.
217 }
218
219 #define STRING_FIELDS_DO(macro) \
220 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
221 macro(_hash_offset, k, "hash", int_signature, false); \
222 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
223 macro(_coder_offset, k, "coder", byte_signature, false);
224
225 void java_lang_String::compute_offsets() {
226 if (_initialized) {
227 return;
228 }
229
230 InstanceKlass* k = vmClasses::String_klass();
231 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
232 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
233
234 _initialized = true;
235 }
236
237 #if INCLUDE_CDS
238 void java_lang_String::serialize_offsets(SerializeClosure* f) {
239 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
240 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
241 f->do_bool(&_initialized);
242 }
243 #endif
244
245 class CompactStringsFixup : public FieldClosure {
246 private:
247 bool _value;
248
249 public:
250 CompactStringsFixup(bool value) : _value(value) {}
251
252 void do_field(fieldDescriptor* fd) {
253 if (fd->name() == vmSymbols::compact_strings_name()) {
254 oop mirror = fd->field_holder()->java_mirror();
255 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
256 assert(mirror != nullptr, "String must have mirror already");
257 mirror->bool_field_put(fd->offset(), _value);
258 }
259 }
260 };
261
262 void java_lang_String::set_compact_strings(bool value) {
263 CompactStringsFixup fix(value);
264 vmClasses::String_klass()->do_local_static_fields(&fix);
265 }
266
267 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
268 assert(_initialized, "Must be initialized");
269 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
270
271 // Create the String object first, so there's a chance that the String
272 // and the char array it points to end up in the same cache line.
273 oop obj;
274 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
275
276 // Create the char array. The String object must be handlized here
277 // because GC can happen as a result of the allocation attempt.
278 Handle h_obj(THREAD, obj);
279 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
280 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
281
282 // Point the String at the char array
283 obj = h_obj();
284 set_value(obj, buffer);
285 // No need to zero the offset, allocation zero'ed the entire String object
286 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
287 return h_obj;
288 }
289
290 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
291 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
292 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
293 typeArrayOop buffer = value(h_obj());
294 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
295 if (is_latin1) {
296 for (int index = 0; index < length; index++) {
297 buffer->byte_at_put(index, (jbyte)unicode[index]);
298 }
299 } else {
300 for (int index = 0; index < length; index++) {
301 buffer->char_at_put(index, unicode[index]);
302 }
303 }
304
305 #ifdef ASSERT
306 {
307 ResourceMark rm;
308 size_t utf8_len = static_cast<size_t>(length);
309 char* expected = UNICODE::as_utf8(unicode, utf8_len);
310 char* actual = as_utf8_string(h_obj());
311 if (strcmp(expected, actual) != 0) {
312 fatal("Unicode conversion failure: %s --> %s", expected, actual);
313 }
314 }
315 #endif
316
317 return h_obj;
318 }
319
320 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
321 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
322 return h_obj();
323 }
324
325 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
326 if (utf8_str == nullptr) {
327 return Handle();
328 }
329 bool has_multibyte, is_latin1;
330 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
331 if (!CompactStrings) {
332 has_multibyte = true;
333 is_latin1 = false;
334 }
335
336 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
337 if (length > 0) {
338 if (!has_multibyte) {
339 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
340 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
341 } else if (is_latin1) {
342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
343 } else {
344 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
345 }
346 }
347
348 #ifdef ASSERT
349 // This check is too strict when the input string is not a valid UTF8.
350 // For example, it may be created with arbitrary content via jni_NewStringUTF.
351 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
352 ResourceMark rm;
353 const char* expected = utf8_str;
354 char* actual = as_utf8_string(h_obj());
355 if (strcmp(expected, actual) != 0) {
356 fatal("String conversion failure: %s --> %s", expected, actual);
357 }
358 }
359 #endif
360
361 return h_obj;
362 }
363
364 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
365 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
366 return h_obj();
367 }
368
369 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
370 const char* utf8_str = (char*)symbol->bytes();
371 int utf8_len = symbol->utf8_length();
372
373 bool has_multibyte, is_latin1;
374 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
375 if (!CompactStrings) {
376 has_multibyte = true;
377 is_latin1 = false;
378 }
379
380 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
381 if (length > 0) {
382 if (!has_multibyte) {
383 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
384 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
385 } else if (is_latin1) {
386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
387 } else {
388 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
389 }
390 }
391
392 #ifdef ASSERT
393 // This check is too strict on older classfile versions
394 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
395 {
396 ResourceMark rm;
397 const char* expected = symbol->as_utf8();
398 char* actual = as_utf8_string(h_obj());
399 if (strncmp(expected, actual, utf8_len) != 0) {
400 fatal("Symbol conversion failure: %s --> %s", expected, actual);
401 }
402 }
403 #endif
404
405 return h_obj;
406 }
407
408 // Converts a C string to a Java String based on current encoding
409 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
410 assert(str != nullptr, "bad arguments");
411
412 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
413 static to_java_string_fn_t _to_java_string_fn = nullptr;
414
415 if (_to_java_string_fn == nullptr) {
416 void *lib_handle = os::native_java_library();
417 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
418 if (_to_java_string_fn == nullptr) {
419 fatal("JNU_NewStringPlatform missing");
420 }
421 }
422
423 jstring js = nullptr;
424 {
425 JavaThread* thread = THREAD;
426 HandleMark hm(thread);
427 ThreadToNativeFromVM ttn(thread);
428 js = (_to_java_string_fn)(thread->jni_environment(), str);
429 }
430
431 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
432 JNIHandles::destroy_local(js); // destroy local JNIHandle.
433 return native_platform_string;
434 }
435
436 // Converts a Java String to a native C string that can be used for
437 // native OS calls.
438 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
439 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
440 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
441
442 if (_to_platform_string_fn == nullptr) {
443 void *lib_handle = os::native_java_library();
444 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
445 if (_to_platform_string_fn == nullptr) {
446 fatal("GetStringPlatformChars missing");
447 }
448 }
449
450 char *native_platform_string;
451 jstring js;
452 { JavaThread* thread = THREAD;
453 js = (jstring) JNIHandles::make_local(thread, java_string());
454 HandleMark hm(thread);
455 ThreadToNativeFromVM ttn(thread);
456 JNIEnv *env = thread->jni_environment();
457 bool is_copy;
458 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
459 assert(is_copy == JNI_TRUE, "is_copy value changed");
460 }
461
462 // Uses a store barrier and therefore needs to be in vm state
463 JNIHandles::destroy_local(js);
464
465 return native_platform_string;
466 }
467
468 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
469 ResourceMark rm(THREAD);
470 return create_from_str(java_name->as_klass_external_name(), THREAD);
471 }
472
473 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
474 jchar* result = as_unicode_string_or_null(java_string, length);
475 if (result == nullptr) {
476 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
477 }
478 return result;
479 }
480
481 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
482 typeArrayOop value = java_lang_String::value(java_string);
483 length = java_lang_String::length(java_string, value);
484 bool is_latin1 = java_lang_String::is_latin1(java_string);
485
486 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
487 if (result != nullptr) {
488 if (!is_latin1) {
489 for (int index = 0; index < length; index++) {
490 result[index] = value->char_at(index);
491 }
492 } else {
493 for (int index = 0; index < length; index++) {
494 result[index] = ((jchar) value->byte_at(index)) & 0xff;
495 }
496 }
497 }
498 return result;
499 }
500
501 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
502 // The hash and hashIsZero fields are subject to a benign data race,
503 // making it crucial to ensure that any observable result of the
504 // calculation in this method stays correct under any possible read of
505 // these fields. Necessary restrictions to allow this to be correct
506 // without explicit memory fences or similar concurrency primitives is
507 // that we can ever only write to one of these two fields for a given
508 // String instance, and that the computation is idempotent and derived
509 // from immutable state
510 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
511 if (java_lang_String::hash_is_set(java_string)) {
512 return java_string->int_field(_hash_offset);
513 }
514
515 typeArrayOop value = java_lang_String::value(java_string);
516 int length = java_lang_String::length(java_string, value);
517 bool is_latin1 = java_lang_String::is_latin1(java_string);
518
519 unsigned int hash = 0;
520 if (length > 0) {
521 if (is_latin1) {
522 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
523 } else {
524 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
525 }
526 }
527
528 if (update) {
529 if (hash != 0) {
530 java_string->int_field_put(_hash_offset, hash);
531 } else {
532 java_string->bool_field_put(_hashIsZero_offset, true);
533 }
534 }
535 return hash;
536 }
537
538 unsigned int java_lang_String::hash_code(oop java_string) {
539 return hash_code_impl(java_string, /*update=*/true);
540 }
541
542 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
543 return hash_code_impl(java_string, /*update=*/false);
544 }
545
546
547 char* java_lang_String::as_quoted_ascii(oop java_string) {
548 typeArrayOop value = java_lang_String::value(java_string);
549 int length = java_lang_String::length(java_string, value);
550 bool is_latin1 = java_lang_String::is_latin1(java_string);
551
552 if (length == 0) return nullptr;
553
554 char* result;
555 size_t result_length;
556 if (!is_latin1) {
557 jchar* base = value->char_at_addr(0);
558 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
559 result = NEW_RESOURCE_ARRAY(char, result_length);
560 UNICODE::as_quoted_ascii(base, length, result, result_length);
561 } else {
562 jbyte* base = value->byte_at_addr(0);
563 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
564 result = NEW_RESOURCE_ARRAY(char, result_length);
565 UNICODE::as_quoted_ascii(base, length, result, result_length);
566 }
567 assert(result_length >= (size_t)length + 1, "must not be shorter");
568 assert(result_length == strlen(result) + 1, "must match");
569 return result;
570 }
571
572 Symbol* java_lang_String::as_symbol(oop java_string) {
573 typeArrayOop value = java_lang_String::value(java_string);
574 int length = java_lang_String::length(java_string, value);
575 bool is_latin1 = java_lang_String::is_latin1(java_string);
576 if (!is_latin1) {
577 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
578 Symbol* sym = SymbolTable::new_symbol(base, length);
579 return sym;
580 } else {
581 ResourceMark rm;
582 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
583 size_t utf8_len = static_cast<size_t>(length);
584 const char* base = UNICODE::as_utf8(position, utf8_len);
585 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
586 return sym;
587 }
588 }
589
590 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
591 typeArrayOop value = java_lang_String::value(java_string);
592 int length = java_lang_String::length(java_string, value);
593 bool is_latin1 = java_lang_String::is_latin1(java_string);
594 if (!is_latin1) {
595 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
596 return SymbolTable::probe_unicode(base, length);
597 } else {
598 ResourceMark rm;
599 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
600 size_t utf8_len = static_cast<size_t>(length);
601 const char* base = UNICODE::as_utf8(position, utf8_len);
602 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
603 }
604 }
605
606 size_t 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 size_t 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 int java_lang_String::utf8_length_as_int(oop java_string) {
626 typeArrayOop value = java_lang_String::value(java_string);
627 return utf8_length_as_int(java_string, value);
628 }
629
630 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
631 assert(value_equals(value, java_lang_String::value(java_string)),
632 "value must be same as java_lang_String::value(java_string)");
633 int length = java_lang_String::length(java_string, value);
634 if (length == 0) {
635 return 0;
636 }
637 if (!java_lang_String::is_latin1(java_string)) {
638 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
639 } else {
640 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
641 }
642 }
643
644 char* java_lang_String::as_utf8_string(oop java_string) {
645 size_t length;
646 return as_utf8_string(java_string, length);
647 }
648
649 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
650 typeArrayOop value = java_lang_String::value(java_string);
651 // `length` is used as the incoming number of characters to
652 // convert, and then set as the number of bytes in the UTF8 sequence.
653 length = java_lang_String::length(java_string, value);
654 bool is_latin1 = java_lang_String::is_latin1(java_string);
655 if (!is_latin1) {
656 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
657 return UNICODE::as_utf8(position, length);
658 } else {
659 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
660 return UNICODE::as_utf8(position, length);
661 }
662 }
663
664 // Uses a provided buffer if it's sufficiently large, otherwise allocates
665 // a resource array to fit
666 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
667 typeArrayOop value = java_lang_String::value(java_string);
668 int len = java_lang_String::length(java_string, value);
669 bool is_latin1 = java_lang_String::is_latin1(java_string);
670 if (!is_latin1) {
671 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
672 utf8_len = UNICODE::utf8_length(position, len);
673 if (utf8_len >= buflen) {
674 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
675 }
676 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
677 } else {
678 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
679 utf8_len = UNICODE::utf8_length(position, len);
680 if (utf8_len >= buflen) {
681 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
682 }
683 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
684 }
685 }
686
687 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
688 assert(value_equals(value, java_lang_String::value(java_string)),
689 "value must be same as java_lang_String::value(java_string)");
690 int length = java_lang_String::length(java_string, value);
691 bool is_latin1 = java_lang_String::is_latin1(java_string);
692 if (!is_latin1) {
693 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
694 return UNICODE::as_utf8(position, length, buf, buflen);
695 } else {
696 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
697 return UNICODE::as_utf8(position, length, buf, buflen);
698 }
699 }
700
701 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
702 typeArrayOop value = java_lang_String::value(java_string);
703 return as_utf8_string(java_string, value, buf, buflen);
704 }
705
706 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
707 // `length` is used as the incoming number of characters to
708 // convert, and then set as the number of bytes in the UTF8 sequence.
709 size_t length = static_cast<size_t>(len);
710 typeArrayOop value = java_lang_String::value(java_string);
711 bool is_latin1 = java_lang_String::is_latin1(java_string);
712 assert(start + len <= java_lang_String::length(java_string), "just checking");
713 if (!is_latin1) {
714 jchar* position = value->char_at_addr(start);
715 return UNICODE::as_utf8(position, length);
716 } else {
717 jbyte* position = value->byte_at_addr(start);
718 return UNICODE::as_utf8(position, length);
719 }
720 }
721
722 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
723 assert(value_equals(value, java_lang_String::value(java_string)),
724 "value must be same as java_lang_String::value(java_string)");
725 assert(start + len <= java_lang_String::length(java_string), "just checking");
726 bool is_latin1 = java_lang_String::is_latin1(java_string);
727 if (!is_latin1) {
728 jchar* position = value->char_at_addr(start);
729 return UNICODE::as_utf8(position, len, buf, buflen);
730 } else {
731 jbyte* position = value->byte_at_addr(start);
732 return UNICODE::as_utf8(position, len, buf, buflen);
733 }
734 }
735
736 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
737 assert(java_string->klass() == vmClasses::String_klass(),
738 "must be java_string");
739 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
740 int length = java_lang_String::length(java_string, value);
741 if (length != len) {
742 return false;
743 }
744 bool is_latin1 = java_lang_String::is_latin1(java_string);
745 if (!is_latin1) {
746 for (int i = 0; i < len; i++) {
747 if (value->char_at(i) != chars[i]) {
748 return false;
749 }
750 }
751 } else {
752 for (int i = 0; i < len; i++) {
753 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
754 return false;
755 }
756 }
757 }
758 return true;
759 }
760
761 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
762 assert(java_string->klass() == vmClasses::String_klass(),
763 "must be java_string");
764 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
765 int length = java_lang_String::length(java_string, value);
766 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
767 if (length != unicode_length) {
768 return false;
769 }
770 bool is_latin1 = java_lang_String::is_latin1(java_string);
771 jchar c;
772 if (!is_latin1) {
773 for (int i = 0; i < unicode_length; i++) {
774 utf8_string = UTF8::next(utf8_string, &c);
775 if (value->char_at(i) != c) {
776 return false;
777 }
778 }
779 } else {
780 for (int i = 0; i < unicode_length; i++) {
781 utf8_string = UTF8::next(utf8_string, &c);
782 if ((((jchar) value->byte_at(i)) & 0xff) != c) {
783 return false;
784 }
785 }
786 }
787 return true;
788 }
789
790 bool java_lang_String::equals(oop str1, oop str2) {
791 assert(str1->klass() == vmClasses::String_klass(),
792 "must be java String");
793 assert(str2->klass() == vmClasses::String_klass(),
794 "must be java String");
795 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
796 bool is_latin1 = java_lang_String::is_latin1(str1);
797 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
798 bool is_latin2 = java_lang_String::is_latin1(str2);
799
800 if (is_latin1 != is_latin2) {
801 // Strings with different coders are never equal.
802 return false;
803 }
804 return value_equals(value1, value2);
805 }
806
807 // Print the given string to the given outputStream, limiting the output to
808 // at most max_length of the string's characters. If the length exceeds the
809 // limit we print an abridged version of the string with the "middle" elided
810 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
811 // it is treated as max_length-1.
812 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
813 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
814 // We need at least two characters to print A ... B
815 assert(max_length > 1, "invalid max_length: %d", max_length);
816
817 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
818
819 if (value == nullptr) {
820 // This can happen if, e.g., printing a String
821 // object before its initializer has been called
822 st->print("nullptr");
823 return;
824 }
825
826 int length = java_lang_String::length(java_string, value);
827 bool is_latin1 = java_lang_String::is_latin1(java_string);
828
829 bool abridge = length > max_length;
830
831 st->print("\"");
832 for (int index = 0; index < length; index++) {
833 // If we need to abridge and we've printed half the allowed characters
834 // then jump to the tail of the string.
835 if (abridge && index >= max_length / 2) {
836 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
837 index = length - (max_length / 2);
838 abridge = false; // only do this once
839 }
840 jchar c = (!is_latin1) ? value->char_at(index) :
841 ((jchar) value->byte_at(index)) & 0xff;
842 if (c < ' ') {
843 st->print("\\x%02X", c); // print control characters e.g. \x0A
844 } else {
845 st->print("%c", c);
846 }
847 }
848 st->print("\"");
849
850 if (length > max_length) {
851 st->print(" (abridged) ");
852 }
853 }
854
855 // java_lang_Class
856
857 int java_lang_Class::_klass_offset;
858 int java_lang_Class::_array_klass_offset;
859 int java_lang_Class::_oop_size_offset;
860 int java_lang_Class::_static_oop_field_count_offset;
861 int java_lang_Class::_class_loader_offset;
862 int java_lang_Class::_module_offset;
863 int java_lang_Class::_protection_domain_offset;
864 int java_lang_Class::_component_mirror_offset;
865 int java_lang_Class::_init_lock_offset;
866 int java_lang_Class::_signers_offset;
867 int java_lang_Class::_name_offset;
868 int java_lang_Class::_source_file_offset;
869 int java_lang_Class::_classData_offset;
870 int java_lang_Class::_classRedefinedCount_offset;
871 int java_lang_Class::_reflectionData_offset;
872 int java_lang_Class::_modifiers_offset;
873 int java_lang_Class::_is_primitive_offset;
874
875 bool java_lang_Class::_offsets_computed = false;
876 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
877 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
878
879 #ifdef ASSERT
880 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
881 assert(fd->has_initial_value(), "caller should have checked this");
882 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
883 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
884 }
885 #endif
886
887 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
888 DEBUG_ONLY(assert_valid_static_string_field(fd);)
889 oop string = fd->string_initial_value(CHECK);
890 mirror()->obj_field_put(fd->offset(), string);
891 }
892
893 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
894 assert(fd->has_initial_value(), "caller should have checked this");
895 BasicType t = fd->field_type();
896 switch (t) {
897 case T_BYTE:
898 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
899 break;
900 case T_BOOLEAN:
901 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
902 break;
903 case T_CHAR:
904 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
905 break;
906 case T_SHORT:
907 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
908 break;
909 case T_INT:
910 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
911 break;
912 case T_FLOAT:
913 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
914 break;
915 case T_DOUBLE:
916 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
917 break;
918 case T_LONG:
919 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
920 break;
921 default:
922 // Illegal ConstantValue attribute in class file should have been
923 // caught during classfile parsing.
924 ShouldNotReachHere();
925 }
926 }
927
928 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
929 assert(mirror.not_null() && fd->is_static(), "just checking");
930 if (fd->has_initial_value()) {
931 if (fd->field_type() != T_OBJECT) {
932 initialize_static_primitive_field(fd, mirror);
933 } else {
934 initialize_static_string_field(fd, mirror, CHECK);
935 }
936 }
937 }
938
939 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
940 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
941
942 // If the offset was read from the shared archive, it was fixed up already
943 if (!k->is_shared()) {
944 if (k->is_instance_klass()) {
945 // During bootstrap, java.lang.Class wasn't loaded so static field
946 // offsets were computed without the size added it. Go back and
947 // update all the static field offsets to included the size.
948
949 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
950 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
951 // static fields offsets are updated in this array before reencoding everything into
952 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
953
954 int java_fields;
955 int injected_fields;
956 InstanceKlass* ik = InstanceKlass::cast(k);
957 GrowableArray<FieldInfo>* fields =
958 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
959 &java_fields, &injected_fields);
960 for (int i = 0; i < fields->length(); i++) {
961 FieldInfo* fi = fields->adr_at(i);
962 if (fi->access_flags().is_static()) {
963 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
964 }
965 }
966 Array<u1>* old_stream = ik->fieldinfo_stream();
967 assert(fields->length() == (java_fields + injected_fields), "Must be");
968 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
969 ik->set_fieldinfo_stream(new_fis);
970 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
971 }
972 }
973
974 if (k->is_shared() && k->has_archived_mirror_index()) {
975 if (ArchiveHeapLoader::is_in_use()) {
976 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
977 assert(present, "Missing archived mirror for %s", k->external_name());
978 return;
979 } else {
980 k->clear_java_mirror_handle();
981 k->clear_archived_mirror_index();
982 }
983 }
984 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
985 }
986
987 void java_lang_Class::initialize_mirror_fields(Klass* k,
988 Handle mirror,
989 Handle protection_domain,
990 Handle classData,
991 TRAPS) {
992 // Allocate a simple java object for a lock.
993 // This needs to be a java object because during class initialization
994 // it can be held across a java call.
995 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
996 set_init_lock(mirror(), r);
997
998 // Set protection domain also
999 set_protection_domain(mirror(), protection_domain());
1000
1001 // Initialize static fields
1002 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1003
1004 // Set classData
1005 set_class_data(mirror(), classData());
1006 }
1007
1008 // Set the java.lang.Module module field in the java_lang_Class mirror
1009 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1010 if (module.is_null()) {
1011 // During startup, the module may be null only if java.base has not been defined yet.
1012 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1013 // for java.base is known. But note that since we captured the null module another
1014 // thread may have completed that initialization.
1015
1016 bool javabase_was_defined = false;
1017 {
1018 MutexLocker m1(current, Module_lock);
1019 // Keep list of classes needing java.base module fixup
1020 if (!ModuleEntryTable::javabase_defined()) {
1021 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1022 k->class_loader_data()->inc_keep_alive_ref_count();
1023 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1024 fixup_module_field_list()->push(k);
1025 } else {
1026 javabase_was_defined = true;
1027 }
1028 }
1029
1030 // If java.base was already defined then patch this particular class with java.base.
1031 if (javabase_was_defined) {
1032 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1033 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
1034 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1035 Handle javabase_handle(current, javabase_entry->module());
1036 set_module(mirror(), javabase_handle());
1037 }
1038 } else {
1039 assert(Universe::is_module_initialized() ||
1040 (ModuleEntryTable::javabase_defined() &&
1041 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
1042 "Incorrect java.lang.Module specification while creating mirror");
1043 set_module(mirror(), module());
1044 }
1045 }
1046
1047 // Statically allocate fixup lists because they always get created.
1048 void java_lang_Class::allocate_fixup_lists() {
1049 GrowableArray<Klass*>* mirror_list =
1050 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1051 set_fixup_mirror_list(mirror_list);
1052
1053 GrowableArray<Klass*>* module_list =
1054 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1055 set_fixup_module_field_list(module_list);
1056 }
1057
1058 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1059 Handle& mirror, Handle& comp_mirror, TRAPS) {
1060 // Allocate mirror (java.lang.Class instance)
1061 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1062 mirror = Handle(THREAD, mirror_oop);
1063
1064 // Setup indirection from mirror->klass
1065 set_klass(mirror(), k);
1066
1067 // Set the modifiers flag.
1068 u2 computed_modifiers = k->compute_modifier_flags();
1069 set_modifiers(mirror(), computed_modifiers);
1070
1071 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1072 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1073
1074 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1075
1076 // It might also have a component mirror. This mirror must already exist.
1077 if (k->is_array_klass()) {
1078 if (k->is_typeArray_klass()) {
1079 BasicType type = TypeArrayKlass::cast(k)->element_type();
1080 if (is_scratch) {
1081 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1082 } else {
1083 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1084 }
1085 } else {
1086 assert(k->is_objArray_klass(), "Must be");
1087 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1088 assert(element_klass != nullptr, "Must have an element klass");
1089 if (is_scratch) {
1090 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1091 } else {
1092 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1093 }
1094 }
1095 assert(comp_mirror() != nullptr, "must have a mirror");
1096
1097 // Two-way link between the array klass and its component mirror:
1098 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1099 set_component_mirror(mirror(), comp_mirror());
1100 // See below for ordering dependencies between field array_klass in component mirror
1101 // and java_mirror in this klass.
1102 } else {
1103 assert(k->is_instance_klass(), "Must be");
1104
1105 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1106 if (HAS_PENDING_EXCEPTION) {
1107 // If any of the fields throws an exception like OOM remove the klass field
1108 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1109 // This mirror looks like a primitive type, which logically it is because it
1110 // it represents no class.
1111 set_klass(mirror(), nullptr);
1112 return;
1113 }
1114 }
1115 }
1116
1117 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1118 Handle module, Handle protection_domain,
1119 Handle classData, TRAPS) {
1120 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1121 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1122
1123 // Class_klass has to be loaded because it is used to allocate
1124 // the mirror.
1125 if (vmClasses::Class_klass_loaded()) {
1126 Handle mirror;
1127 Handle comp_mirror;
1128
1129 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1130
1131 // set the classLoader field in the java_lang_Class instance
1132 assert(class_loader() == k->class_loader(), "should be same");
1133 set_class_loader(mirror(), class_loader());
1134
1135 // Setup indirection from klass->mirror
1136 // after any exceptions can happen during allocations.
1137 k->set_java_mirror(mirror);
1138
1139 // Set the module field in the java_lang_Class instance. This must be done
1140 // after the mirror is set.
1141 set_mirror_module_field(THREAD, k, mirror, module);
1142
1143 if (comp_mirror() != nullptr) {
1144 // Set after k->java_mirror() is published, because compiled code running
1145 // concurrently doesn't expect a k to have a null java_mirror.
1146 release_set_array_klass(comp_mirror(), k);
1147 }
1148 if (CDSConfig::is_dumping_heap()) {
1149 create_scratch_mirror(k, CHECK);
1150 }
1151 } else {
1152 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1153 fixup_mirror_list()->push(k);
1154 }
1155 }
1156
1157 #if INCLUDE_CDS_JAVA_HEAP
1158 // The "scratch mirror" stores the states of the mirror object that can be
1159 // decided at dump time (such as the initial values of the static fields, the
1160 // component mirror, etc). At runtime, more information is added to it by
1161 // java_lang_Class::restore_archived_mirror().
1162 //
1163 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1164 // produces the same result as /*runtime*/create_mirror().
1165 //
1166 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1167 // latter may contain dumptime-specific information that cannot be archived
1168 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1169 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1170 if (k->class_loader() != nullptr &&
1171 k->class_loader() != SystemDictionary::java_platform_loader() &&
1172 k->class_loader() != SystemDictionary::java_system_loader()) {
1173 // We only archive the mirrors of classes loaded by the built-in loaders
1174 return;
1175 }
1176
1177 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1178 Handle mirror;
1179 Handle comp_mirror;
1180 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1181
1182 if (comp_mirror() != nullptr) {
1183 release_set_array_klass(comp_mirror(), k);
1184 }
1185
1186 HeapShared::set_scratch_java_mirror(k, mirror());
1187 }
1188
1189 // Returns true if the mirror is updated, false if no archived mirror
1190 // data is present. After the archived mirror object is restored, the
1191 // shared klass' _has_raw_archived_mirror flag is cleared.
1192 bool java_lang_Class::restore_archived_mirror(Klass *k,
1193 Handle class_loader, Handle module,
1194 Handle protection_domain, TRAPS) {
1195 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1196 // see more details in vmClasses::resolve_all().
1197 if (!vmClasses::Class_klass_loaded()) {
1198 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1199 fixup_mirror_list()->push(k);
1200 return true;
1201 }
1202
1203 oop m = k->archived_java_mirror();
1204 assert(m != nullptr, "must have stored non-null archived mirror");
1205
1206 // Sanity: clear it now to prevent re-initialization if any of the following fails
1207 k->clear_archived_mirror_index();
1208
1209 // mirror is archived, restore
1210 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1211 assert(as_Klass(m) == k, "must be");
1212 Handle mirror(THREAD, m);
1213
1214 if (!k->is_array_klass()) {
1215 // - local static final fields with initial values were initialized at dump time
1216
1217 // create the init_lock
1218 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1219 set_init_lock(mirror(), r);
1220
1221 if (protection_domain.not_null()) {
1222 set_protection_domain(mirror(), protection_domain());
1223 }
1224 }
1225
1226 assert(class_loader() == k->class_loader(), "should be same");
1227 if (class_loader.not_null()) {
1228 set_class_loader(mirror(), class_loader());
1229 }
1230
1231 k->set_java_mirror(mirror);
1232
1233 set_mirror_module_field(THREAD, k, mirror, module);
1234
1235 if (log_is_enabled(Trace, cds, heap, mirror)) {
1236 ResourceMark rm(THREAD);
1237 log_trace(cds, heap, mirror)(
1238 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1239 }
1240
1241 return true;
1242 }
1243 #endif // INCLUDE_CDS_JAVA_HEAP
1244
1245 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1246 assert(_module_offset != 0, "must have been computed already");
1247 set_module(k->java_mirror(), module());
1248 }
1249
1250 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1251 assert(_oop_size_offset != 0, "must be set");
1252 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1253 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1254 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1255 }
1256
1257 int java_lang_Class::static_oop_field_count(oop java_class) {
1258 assert(_static_oop_field_count_offset != 0, "must be set");
1259 return java_class->int_field(_static_oop_field_count_offset);
1260 }
1261
1262 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1263 assert(_static_oop_field_count_offset != 0, "must be set");
1264 java_class->int_field_put(_static_oop_field_count_offset, size);
1265 }
1266
1267 oop java_lang_Class::protection_domain(oop java_class) {
1268 assert(_protection_domain_offset != 0, "must be set");
1269 return java_class->obj_field(_protection_domain_offset);
1270 }
1271 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1272 assert(_protection_domain_offset != 0, "must be set");
1273 java_class->obj_field_put(_protection_domain_offset, pd);
1274 }
1275
1276 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1277 assert(_component_mirror_offset != 0, "must be set");
1278 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1279 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1280 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1281 }
1282
1283 oop java_lang_Class::component_mirror(oop java_class) {
1284 assert(_component_mirror_offset != 0, "must be set");
1285 return java_class->obj_field(_component_mirror_offset);
1286 }
1287
1288 oop java_lang_Class::init_lock(oop java_class) {
1289 assert(_init_lock_offset != 0, "must be set");
1290 return java_class->obj_field(_init_lock_offset);
1291 }
1292 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1293 assert(_init_lock_offset != 0, "must be set");
1294 java_class->obj_field_put(_init_lock_offset, init_lock);
1295 }
1296
1297 objArrayOop java_lang_Class::signers(oop java_class) {
1298 assert(_signers_offset != 0, "must be set");
1299 return (objArrayOop)java_class->obj_field(_signers_offset);
1300 }
1301
1302 oop java_lang_Class::class_data(oop java_class) {
1303 assert(_classData_offset != 0, "must be set");
1304 return java_class->obj_field(_classData_offset);
1305 }
1306 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1307 assert(_classData_offset != 0, "must be set");
1308 java_class->obj_field_put(_classData_offset, class_data);
1309 }
1310
1311 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1312 assert(_reflectionData_offset != 0, "must be set");
1313 java_class->obj_field_put(_reflectionData_offset, reflection_data);
1314 }
1315
1316 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1317 assert(_class_loader_offset != 0, "offsets should have been initialized");
1318 java_class->obj_field_put(_class_loader_offset, loader);
1319 }
1320
1321 oop java_lang_Class::class_loader(oop java_class) {
1322 assert(_class_loader_offset != 0, "must be set");
1323 return java_class->obj_field(_class_loader_offset);
1324 }
1325
1326 oop java_lang_Class::module(oop java_class) {
1327 assert(_module_offset != 0, "must be set");
1328 return java_class->obj_field(_module_offset);
1329 }
1330
1331 void java_lang_Class::set_module(oop java_class, oop module) {
1332 assert(_module_offset != 0, "must be set");
1333 java_class->obj_field_put(_module_offset, module);
1334 }
1335
1336 oop java_lang_Class::name(Handle java_class, TRAPS) {
1337 assert(_name_offset != 0, "must be set");
1338 oop o = java_class->obj_field(_name_offset);
1339 if (o == nullptr) {
1340 o = StringTable::intern(as_external_name(java_class()), THREAD);
1341 java_class->obj_field_put(_name_offset, o);
1342 }
1343 return o;
1344 }
1345
1346 oop java_lang_Class::source_file(oop java_class) {
1347 assert(_source_file_offset != 0, "must be set");
1348 return java_class->obj_field(_source_file_offset);
1349 }
1350
1351 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1352 assert(_source_file_offset != 0, "must be set");
1353 java_class->obj_field_put(_source_file_offset, source_file);
1354 }
1355
1356 void java_lang_Class::set_is_primitive(oop java_class) {
1357 assert(_is_primitive_offset != 0, "must be set");
1358 java_class->bool_field_put(_is_primitive_offset, true);
1359 }
1360
1361
1362 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1363 // Mirrors for basic types have a null klass field, which makes them special.
1364 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1365 if (type != T_VOID) {
1366 Klass* aklass = Universe::typeArrayKlass(type);
1367 assert(aklass != nullptr, "correct bootstrap");
1368 release_set_array_klass(java_class, aklass);
1369 }
1370 #ifdef ASSERT
1371 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1372 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1373 #endif
1374 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1375 set_is_primitive(java_class);
1376 return java_class;
1377 }
1378
1379 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1380 assert(is_instance(java_class), "must be a Class object");
1381 java_class->metadata_field_put(_klass_offset, klass);
1382 }
1383
1384
1385 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1386 assert(is_instance(java_class), "must be a Class object");
1387 Symbol* name = nullptr;
1388 bool is_instance = false;
1389 if (is_primitive(java_class)) {
1390 name = vmSymbols::type_signature(primitive_type(java_class));
1391 } else {
1392 Klass* k = as_Klass(java_class);
1393 is_instance = k->is_instance_klass();
1394 name = k->name();
1395 }
1396 if (name == nullptr) {
1397 st->print("<null>");
1398 return;
1399 }
1400 if (is_instance) st->print("L");
1401 st->write((char*) name->base(), (int) name->utf8_length());
1402 if (is_instance) st->print(";");
1403 }
1404
1405 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1406 assert(is_instance(java_class), "must be a Class object");
1407 Symbol* name;
1408 if (is_primitive(java_class)) {
1409 name = vmSymbols::type_signature(primitive_type(java_class));
1410 // Because this can create a new symbol, the caller has to decrement
1411 // the refcount, so make adjustment here and below for symbols returned
1412 // that are not created or incremented due to a successful lookup.
1413 name->increment_refcount();
1414 } else {
1415 Klass* k = as_Klass(java_class);
1416 if (!k->is_instance_klass()) {
1417 name = k->name();
1418 name->increment_refcount();
1419 } else {
1420 ResourceMark rm;
1421 const char* sigstr = k->signature_name();
1422 int siglen = (int) strlen(sigstr);
1423 if (!intern_if_not_found) {
1424 name = SymbolTable::probe(sigstr, siglen);
1425 } else {
1426 name = SymbolTable::new_symbol(sigstr, siglen);
1427 }
1428 }
1429 }
1430 return name;
1431 }
1432
1433 // Returns the Java name for this Java mirror (Resource allocated)
1434 // See Klass::external_name().
1435 // For primitive type Java mirrors, its type name is returned.
1436 const char* java_lang_Class::as_external_name(oop java_class) {
1437 assert(is_instance(java_class), "must be a Class object");
1438 const char* name = nullptr;
1439 if (is_primitive(java_class)) {
1440 name = type2name(primitive_type(java_class));
1441 } else {
1442 name = as_Klass(java_class)->external_name();
1443 }
1444 if (name == nullptr) {
1445 name = "<null>";
1446 }
1447 return name;
1448 }
1449
1450 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1451 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1452 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1453 return k;
1454 }
1455
1456
1457 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1458 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1459 java_class->release_metadata_field_put(_array_klass_offset, klass);
1460 }
1461
1462
1463 BasicType java_lang_Class::primitive_type(oop java_class) {
1464 assert(is_primitive(java_class), "just checking");
1465 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1466 BasicType type = T_VOID;
1467 if (ak != nullptr) {
1468 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1469 type = ArrayKlass::cast(ak)->element_type();
1470 } else {
1471 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1472 }
1473 #ifdef ASSERT
1474 if (CDSConfig::is_dumping_heap()) {
1475 oop mirror = Universe::java_mirror(type);
1476 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1477 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1478 } else {
1479 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1480 }
1481 #endif
1482 return type;
1483 }
1484
1485 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1486 assert(is_instance(java_class), "must be a Class object");
1487 if (is_primitive(java_class)) {
1488 if (reference_klass != nullptr)
1489 (*reference_klass) = nullptr;
1490 return primitive_type(java_class);
1491 } else {
1492 if (reference_klass != nullptr)
1493 (*reference_klass) = as_Klass(java_class);
1494 return T_OBJECT;
1495 }
1496 }
1497
1498
1499 oop java_lang_Class::primitive_mirror(BasicType t) {
1500 oop mirror = Universe::java_mirror(t);
1501 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1502 assert(is_primitive(mirror), "must be primitive");
1503 return mirror;
1504 }
1505
1506 #define CLASS_FIELDS_DO(macro) \
1507 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1508 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1509 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1510 macro(_module_offset, k, "module", module_signature, false); \
1511 macro(_name_offset, k, "name", string_signature, false); \
1512 macro(_classData_offset, k, "classData", object_signature, false); \
1513 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \
1514 macro(_signers_offset, k, "signers", object_array_signature, false); \
1515 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1516 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1517 macro(_is_primitive_offset, k, "primitive", bool_signature, false);
1518
1519 void java_lang_Class::compute_offsets() {
1520 if (_offsets_computed) {
1521 return;
1522 }
1523
1524 _offsets_computed = true;
1525
1526 InstanceKlass* k = vmClasses::Class_klass();
1527 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1528 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1529 }
1530
1531 #if INCLUDE_CDS
1532 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1533 f->do_bool(&_offsets_computed);
1534
1535 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1536
1537 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1538 }
1539 #endif
1540
1541 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1542 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1543 return the_class_mirror->int_field(_classRedefinedCount_offset);
1544 }
1545
1546 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1547 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1548 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1549 }
1550
1551 int java_lang_Class::modifiers(oop the_class_mirror) {
1552 assert(_modifiers_offset != 0, "offsets should have been initialized");
1553 return the_class_mirror->char_field(_modifiers_offset);
1554 }
1555
1556 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1557 assert(_modifiers_offset != 0, "offsets should have been initialized");
1558 the_class_mirror->char_field_put(_modifiers_offset, value);
1559 }
1560
1561
1562 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1563 // platform thread structure, and a eetop offset which was used for thread
1564 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1565 // merged, so in the HotSpot VM we just use the eetop field for the thread
1566 // instead of the privateInfo_offset.
1567 //
1568 // Note: The stackSize field is only present starting in 1.4.
1569
1570 int java_lang_Thread_FieldHolder::_group_offset;
1571 int java_lang_Thread_FieldHolder::_priority_offset;
1572 int java_lang_Thread_FieldHolder::_stackSize_offset;
1573 int java_lang_Thread_FieldHolder::_daemon_offset;
1574 int java_lang_Thread_FieldHolder::_thread_status_offset;
1575
1576 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1577 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1578 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1579 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1580 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1581 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1582
1583 void java_lang_Thread_FieldHolder::compute_offsets() {
1584 assert(_group_offset == 0, "offsets should be initialized only once");
1585
1586 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1587 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1588 }
1589
1590 #if INCLUDE_CDS
1591 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1592 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1593 }
1594 #endif
1595
1596 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1597 return holder->obj_field(_group_offset);
1598 }
1599
1600 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1601 return (ThreadPriority)holder->int_field(_priority_offset);
1602 }
1603
1604 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1605 holder->int_field_put(_priority_offset, priority);
1606 }
1607
1608 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1609 return holder->long_field(_stackSize_offset);
1610 }
1611
1612 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1613 return holder->bool_field(_daemon_offset) != 0;
1614 }
1615
1616 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1617 assert(val, "daemon status is never turned off");
1618 holder->bool_field_put(_daemon_offset, val);
1619 }
1620
1621 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1622 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1623 }
1624
1625 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1626 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1627 }
1628
1629
1630 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1631
1632 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1633 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1634
1635 void java_lang_Thread_Constants::compute_offsets() {
1636 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1637
1638 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1639 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1640 }
1641
1642 #if INCLUDE_CDS
1643 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1644 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1645 }
1646 #endif
1647
1648 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1649 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1650 oop base = k->static_field_base_raw();
1651 return base->obj_field(_static_VTHREAD_GROUP_offset);
1652 }
1653
1654
1655 int java_lang_Thread::_holder_offset;
1656 int java_lang_Thread::_name_offset;
1657 int java_lang_Thread::_contextClassLoader_offset;
1658 int java_lang_Thread::_eetop_offset;
1659 int java_lang_Thread::_jvmti_thread_state_offset;
1660 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1661 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1662 int java_lang_Thread::_interrupted_offset;
1663 int java_lang_Thread::_interruptLock_offset;
1664 int java_lang_Thread::_tid_offset;
1665 int java_lang_Thread::_continuation_offset;
1666 int java_lang_Thread::_park_blocker_offset;
1667 int java_lang_Thread::_scopedValueBindings_offset;
1668 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1669
1670 #define THREAD_FIELDS_DO(macro) \
1671 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1672 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1673 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1674 macro(_eetop_offset, k, "eetop", long_signature, false); \
1675 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1676 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1677 macro(_tid_offset, k, "tid", long_signature, false); \
1678 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1679 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1680 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1681
1682 void java_lang_Thread::compute_offsets() {
1683 assert(_holder_offset == 0, "offsets should be initialized only once");
1684
1685 InstanceKlass* k = vmClasses::Thread_klass();
1686 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1687 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1688 }
1689
1690 #if INCLUDE_CDS
1691 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1692 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1693 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1694 }
1695 #endif
1696
1697 JavaThread* java_lang_Thread::thread(oop java_thread) {
1698 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1699 }
1700
1701 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1702 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1703 }
1704
1705 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1706 java_thread->address_field_put(_eetop_offset, (address)thread);
1707 }
1708
1709 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1710 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1711 }
1712
1713 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1714 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1715 }
1716
1717 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1718 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1719 }
1720
1721 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1722 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1723 }
1724
1725 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1726 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1727 int val = VTMS_transition_disable_count(java_thread);
1728 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1729 }
1730
1731 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1732 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1733 int val = VTMS_transition_disable_count(java_thread);
1734 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1735 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1736 }
1737
1738 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1739 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1740 }
1741
1742 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1743 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1744 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1745 }
1746
1747 int java_lang_Thread::is_in_VTMS_transition_offset() {
1748 return _jvmti_is_in_VTMS_transition_offset;
1749 }
1750
1751 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1752 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1753 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1754 }
1755
1756 oop java_lang_Thread::holder(oop java_thread) {
1757 // Note: may return null if the thread is still attaching
1758 return java_thread->obj_field(_holder_offset);
1759 }
1760 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1761 return java_thread->obj_field(_interruptLock_offset);
1762 }
1763
1764 bool java_lang_Thread::interrupted(oop java_thread) {
1765 // Make sure the caller can safely access oops.
1766 assert(Thread::current()->is_VM_thread() ||
1767 (JavaThread::current()->thread_state() != _thread_blocked &&
1768 JavaThread::current()->thread_state() != _thread_in_native),
1769 "Unsafe access to oop");
1770 return java_thread->bool_field_volatile(_interrupted_offset);
1771 }
1772
1773 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1774 // Make sure the caller can safely access oops.
1775 assert(Thread::current()->is_VM_thread() ||
1776 (JavaThread::current()->thread_state() != _thread_blocked &&
1777 JavaThread::current()->thread_state() != _thread_in_native),
1778 "Unsafe access to oop");
1779 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1780 }
1781
1782
1783 oop java_lang_Thread::name(oop java_thread) {
1784 return java_thread->obj_field(_name_offset);
1785 }
1786
1787
1788 void java_lang_Thread::set_name(oop java_thread, oop name) {
1789 java_thread->obj_field_put(_name_offset, name);
1790 }
1791
1792 // Convenience macros for setting and getting Thread fields that
1793 // are actually stored in the FieldHolder object of the thread.
1794 // The FieldHolder can be null whilst a thread is attaching via
1795 // JNI, and when the main thread is attaching.
1796
1797 // The default value should be the default/zero initialized value
1798 // of the field as it would be in java.lang.Thread.FieldHolder.
1799 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1800 { \
1801 oop holder = java_lang_Thread::holder(java_thread); \
1802 if (holder != nullptr) \
1803 return java_lang_Thread_FieldHolder::field(holder); \
1804 else \
1805 return default_val; \
1806 }
1807
1808 // We should never be trying to set a field of an attaching thread.
1809 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1810 { \
1811 oop holder = java_lang_Thread::holder(java_thread); \
1812 assert(holder != nullptr, "Thread not fully initialized"); \
1813 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1814 }
1815
1816
1817 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1818 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1819 }
1820
1821
1822 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1823 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1824 }
1825
1826
1827 oop java_lang_Thread::threadGroup(oop java_thread) {
1828 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1829 }
1830
1831
1832 bool java_lang_Thread::is_alive(oop java_thread) {
1833 JavaThread* thr = java_lang_Thread::thread(java_thread);
1834 return (thr != nullptr);
1835 }
1836
1837
1838 bool java_lang_Thread::is_daemon(oop java_thread) {
1839 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1840 }
1841
1842
1843 void java_lang_Thread::set_daemon(oop java_thread) {
1844 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1845 }
1846
1847 oop java_lang_Thread::context_class_loader(oop java_thread) {
1848 return java_thread->obj_field(_contextClassLoader_offset);
1849 }
1850
1851
1852 jlong java_lang_Thread::stackSize(oop java_thread) {
1853 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1854 }
1855
1856 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1857 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1858 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1859 }
1860
1861 // Read thread status value from threadStatus field in java.lang.Thread java class.
1862 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1863 // Make sure the caller is operating on behalf of the VM or is
1864 // running VM code (state == _thread_in_vm).
1865 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1866 JavaThread::current()->thread_state() == _thread_in_vm,
1867 "Java Thread is not running in vm");
1868 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1869 }
1870
1871 ByteSize java_lang_Thread::thread_id_offset() {
1872 return in_ByteSize(_tid_offset);
1873 }
1874
1875 oop java_lang_Thread::park_blocker(oop java_thread) {
1876 return java_thread->obj_field(_park_blocker_offset);
1877 }
1878
1879
1880 struct LockInfo {
1881 enum { // should be synced with jdk.internal.vm.ThreadSnapshot.ThreadLock constants
1882 PARKING_TO_WAIT = 0,
1883 ELEMINATED_SCALAR_REPLACED = 1,
1884 ELEMINATED_MONITOR = 2,
1885 LOCKED = 3,
1886 WAITING_TO_LOCK = 4,
1887 WAITING_ON = 5,
1888 WAITING_TO_RELOCK = 6,
1889 OWNABLE_SYNCHRONIZER = 7,
1890 };
1891
1892 int _depth;
1893 int _type;
1894 oop _obj;
1895
1896 LockInfo(int depth, int type, oop obj) : _depth(depth), _type(type), _obj(obj) {}
1897 LockInfo() : _depth(0), _type(0), _obj(nullptr) {}
1898 };
1899
1900 class GetThreadSnapshotClosure : public HandshakeClosure {
1901 public:
1902 Handle _java_thread;
1903 JavaThread* _thread;
1904 int _depth;
1905 bool _retry_handshake;
1906 GrowableArray<Method*>* _methods;
1907 GrowableArray<int>* _bcis;
1908 JavaThreadStatus _thread_status;
1909 oop _name;
1910 bool _with_locks;
1911 bool _found_first_lock;
1912 GrowableArray<LockInfo>* _locks;
1913
1914 GetThreadSnapshotClosure(Handle java_thread, JavaThread* thread, bool with_locks) :
1915 HandshakeClosure("GetThreadSnapshotClosure"), _java_thread(java_thread), _thread(thread),
1916 _depth(0), _retry_handshake(false),
1917 _methods(nullptr), _bcis(nullptr),
1918 _thread_status(), _name(nullptr),
1919 _with_locks(with_locks), _found_first_lock(false), _locks(nullptr) { }
1920 virtual ~GetThreadSnapshotClosure() {
1921 delete _methods;
1922 delete _bcis;
1923 if (_locks != nullptr) {
1924 delete _locks;
1925 }
1926 }
1927
1928 bool read_reset_retry() {
1929 bool ret = _retry_handshake;
1930 // If we re-execute the handshake this method need to return false
1931 // when the handshake cannot be performed. (E.g. thread terminating)
1932 _retry_handshake = false;
1933 return ret;
1934 }
1935
1936 void detect_locks(javaVFrame* jvf, int depth) {
1937 Thread* current = Thread::current();
1938
1939 if (depth == 0 && !_found_first_lock) {
1940 // See javaVFrame::print_lock_info_on() for some other cases:
1941 // "waiting to re-lock in wait", "waiting on the Class initialization monitor".
1942
1943 // If this is the first frame and it is java.lang.Object.wait(...)
1944 // then print out the receiver.
1945 if (jvf->method()->name() == vmSymbols::wait_name() &&
1946 jvf->method()->method_holder()->name() == vmSymbols::java_lang_Object()) {
1947 StackValueCollection* locs = jvf->locals();
1948 if (locs->is_empty()) {
1949 _locks->push(LockInfo(depth, LockInfo::WAITING_ON, nullptr));
1950 } else {
1951 int type = LockInfo::WAITING_ON;
1952 StackValue* sv = locs->at(0);
1953 if (sv->type() == T_OBJECT) {
1954 Handle o = locs->at(0)->get_obj();
1955 if (_thread_status == JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER) {
1956 type = LockInfo::WAITING_TO_RELOCK;;
1957 }
1958 _locks->push(LockInfo(depth, type, o()));
1959 }
1960 }
1961 _found_first_lock = true;
1962 } else {
1963 oop park_blocker = java_lang_Thread::park_blocker(_java_thread());
1964 if (park_blocker != nullptr) {
1965 _locks->push(LockInfo(depth, LockInfo::PARKING_TO_WAIT, park_blocker));
1966 _found_first_lock = true;
1967 }
1968 }
1969 }
1970
1971 GrowableArray<MonitorInfo*>* mons = jvf->monitors();
1972 if (!mons->is_empty()) {
1973 for (int index = (mons->length() - 1); index >= 0; index--) {
1974 MonitorInfo* monitor = mons->at(index);
1975 if (monitor->eliminated() && jvf->is_compiled_frame()) { // Eliminated in compiled code
1976 if (monitor->owner_is_scalar_replaced()) {
1977 Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
1978 _locks->push(LockInfo(depth, LockInfo::ELEMINATED_SCALAR_REPLACED, k->klass_holder()));
1979 } else {
1980 Handle obj(current, monitor->owner());
1981 if (obj() != nullptr) {
1982 _locks->push(LockInfo(depth, LockInfo::ELEMINATED_MONITOR, obj()));
1983 }
1984 }
1985 continue;
1986 }
1987 if (monitor->owner() != nullptr) {
1988 // the monitor is associated with an object, i.e., it is locked
1989 int type = LockInfo::LOCKED;
1990
1991 if (depth == 0 && !_found_first_lock) {
1992 ObjectMonitor* pending_moninor = java_lang_VirtualThread::is_instance(_java_thread())
1993 ? java_lang_VirtualThread::current_pending_monitor(_java_thread())
1994 : jvf->thread()->current_pending_monitor();
1995
1996 markWord mark = monitor->owner()->mark();
1997 // The first stage of async deflation does not affect any field
1998 // used by this comparison so the ObjectMonitor* is usable here.
1999 if (mark.has_monitor()) {
2000 ObjectMonitor* mon = ObjectSynchronizer::read_monitor(current, monitor->owner(), mark);
2001 if (// if the monitor is null we must be in the process of locking
2002 mon == nullptr ||
2003 // we have marked ourself as pending on this monitor
2004 mon == pending_moninor ||
2005 // we are not the owner of this monitor
2006 false/*!mon->is_entered(thread())*/) {
2007 type = LockInfo::WAITING_TO_LOCK;
2008 }
2009 }
2010 }
2011 _locks->push(LockInfo(depth, type, monitor->owner()));
2012
2013 _found_first_lock = true;
2014 }
2015 }
2016 }
2017 }
2018
2019 void do_thread(Thread* th) override {
2020 if (!Thread::current()->is_Java_thread()) {
2021 _retry_handshake = true;
2022 return;
2023 }
2024
2025 bool is_virtual = java_lang_VirtualThread::is_instance(_java_thread());
2026 if (_thread != nullptr) {
2027 if (is_virtual) {
2028 // mounted vthread, use carrier thread state
2029 oop carrier_thread = java_lang_VirtualThread::carrier_thread(_java_thread());
2030 _thread_status = java_lang_Thread::get_thread_status(carrier_thread);
2031 } else {
2032 _thread_status = java_lang_Thread::get_thread_status(_java_thread());
2033 }
2034 } else {
2035 // unmounted vthread
2036 int vt_state = java_lang_VirtualThread::state(_java_thread());
2037 _thread_status = java_lang_VirtualThread::map_state_to_thread_status(vt_state);
2038 }
2039 _name = nullptr; //java_lang_Thread::name(_java_thread());
2040
2041 if (_thread != nullptr && !_thread->has_last_Java_frame()) {
2042 // stack trace is empty
2043 return;
2044 }
2045
2046 bool carrier = false;
2047
2048 if (is_virtual) {
2049 if (_thread != nullptr) {
2050 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
2051 const ContinuationEntry* ce = _thread->vthread_continuation();
2052 if (ce == nullptr || ce->cont_oop(_thread) != java_lang_VirtualThread::continuation(_java_thread())) {
2053 // TODO: handle
2054 }
2055 }
2056 } else {
2057 carrier = (_thread->vthread_continuation() != nullptr);
2058 }
2059
2060 ResourceMark rm(Thread::current());
2061
2062 const int max_depth = MaxJavaStackTraceDepth;
2063 const bool skip_hidden = !ShowHiddenFrames;
2064
2065 // Pick minimum length that will cover most cases
2066 int init_length = 64;
2067 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
2068 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
2069
2070 if (_with_locks) {
2071 _locks = new (mtInternal) GrowableArray<LockInfo>(init_length, mtInternal);
2072 }
2073 int total_count = 0;
2074
2075 vframeStream vfst(_thread != nullptr
2076 ? vframeStream(_thread, false, false, carrier)
2077 : vframeStream(java_lang_VirtualThread::continuation(_java_thread())));
2078
2079 for (;
2080 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
2081 vfst.next()) {
2082 if (_with_locks) {
2083 detect_locks(vfst.asJavaVFrame(), total_count);
2084 }
2085 if (skip_hidden && (vfst.method()->is_hidden() ||
2086 vfst.method()->is_continuation_enter_intrinsic())) {
2087 continue;
2088 }
2089 _methods->push(vfst.method());
2090 _bcis->push(vfst.bci());
2091 total_count++;
2092 }
2093
2094 _depth = total_count;
2095 }
2096 };
2097
2098 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
2099 ThreadsListHandle tlh(JavaThread::current());
2100 JavaThread* thread;
2101 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
2102 if (is_virtual) {
2103 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
2104 if (carrier_thread == nullptr) {
2105 return nullptr;
2106 }
2107 thread = java_lang_Thread::thread(carrier_thread);
2108 } else {
2109 thread = java_lang_Thread::thread(java_thread);
2110 }
2111 if (thread == nullptr) {
2112 return nullptr;
2113 }
2114
2115 class GetStackTraceClosure : public HandshakeClosure {
2116 public:
2117 const Handle _java_thread;
2118 int _depth;
2119 bool _retry_handshake;
2120 GrowableArray<Method*>* _methods;
2121 GrowableArray<int>* _bcis;
2122
2123 GetStackTraceClosure(Handle java_thread) :
2124 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
2125 _methods(nullptr), _bcis(nullptr) {
2126 }
2127 ~GetStackTraceClosure() {
2128 delete _methods;
2129 delete _bcis;
2130 }
2131
2132 bool read_reset_retry() {
2133 bool ret = _retry_handshake;
2134 // If we re-execute the handshake this method need to return false
2135 // when the handshake cannot be performed. (E.g. thread terminating)
2136 _retry_handshake = false;
2137 return ret;
2138 }
2139
2140 void do_thread(Thread* th) {
2141 if (!Thread::current()->is_Java_thread()) {
2142 _retry_handshake = true;
2143 return;
2144 }
2145
2146 JavaThread* thread = JavaThread::cast(th);
2147
2148 if (!thread->has_last_Java_frame()) {
2149 return;
2150 }
2151
2152 bool carrier = false;
2153 if (java_lang_VirtualThread::is_instance(_java_thread())) {
2154 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
2155 const ContinuationEntry* ce = thread->vthread_continuation();
2156 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
2157 return; // not mounted
2158 }
2159 } else {
2160 carrier = (thread->vthread_continuation() != nullptr);
2161 }
2162
2163 const int max_depth = MaxJavaStackTraceDepth;
2164 const bool skip_hidden = !ShowHiddenFrames;
2165
2166 // Pick minimum length that will cover most cases
2167 int init_length = 64;
2168 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
2169 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
2170
2171 int total_count = 0;
2172 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
2173 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
2174 vfst.next()) {
2175
2176 if (skip_hidden && (vfst.method()->is_hidden() ||
2177 vfst.method()->is_continuation_enter_intrinsic())) {
2178 continue;
2179 }
2180
2181 _methods->push(vfst.method());
2182 _bcis->push(vfst.bci());
2183 total_count++;
2184 }
2185
2186 _depth = total_count;
2187 }
2188 };
2189
2190 // Handshake with target
2191 ResourceMark rm(THREAD);
2192 HandleMark hm(THREAD);
2193 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
2194 do {
2195 Handshake::execute(&gstc, &tlh, thread);
2196 } while (gstc.read_reset_retry());
2197
2198 // Stop if no stack trace is found.
2199 if (gstc._depth == 0) {
2200 return nullptr;
2201 }
2202
2203 // Convert to StackTraceElement array
2204 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2205 assert(k != nullptr, "must be loaded in 1.4+");
2206 if (k->should_be_initialized()) {
2207 k->initialize(CHECK_NULL);
2208 }
2209 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
2210
2211 for (int i = 0; i < gstc._depth; i++) {
2212 methodHandle method(THREAD, gstc._methods->at(i));
2213 oop element = java_lang_StackTraceElement::create(method,
2214 gstc._bcis->at(i),
2215 CHECK_NULL);
2216 trace->obj_at_put(i, element);
2217 }
2218
2219 return trace();
2220 }
2221
2222 oop java_lang_Thread::get_thread_snapshot(jobject jthread, bool with_locks, TRAPS) {
2223 ThreadsListHandle tlh(JavaThread::current());
2224
2225 oop java_thread = JNIHandles::resolve(jthread);
2226
2227 // wrapper to auto delete JvmtiVTMSTransitionDisabler
2228 class TransitionDisabler {
2229 JvmtiVTMSTransitionDisabler* _transition_disabler;
2230 public:
2231 TransitionDisabler() : _transition_disabler(nullptr) {}
2232 ~TransitionDisabler() {
2233 if (_transition_disabler != nullptr) {
2234 delete _transition_disabler;
2235 }
2236 }
2237 void init(jobject jthread) {
2238 _transition_disabler = new (mtInternal) JvmtiVTMSTransitionDisabler(jthread);
2239 }
2240 } transition_disabler;
2241
2242 JavaThread* thread = nullptr;
2243 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
2244
2245 if (is_virtual) {
2246 // 1st need to disable mount/unmount transitions
2247 transition_disabler.init(jthread);
2248
2249 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
2250 if (carrier_thread != nullptr) {
2251 thread = java_lang_Thread::thread(carrier_thread);
2252 } else {
2253 // TODO: need to "suspend" the VT like VirtualThread.getStackTrace does
2254 }
2255 } else {
2256 thread = java_lang_Thread::thread(java_thread);
2257 }
2258
2259 // Handshake with target
2260 ResourceMark rm(THREAD);
2261 HandleMark hm(THREAD);
2262 GetThreadSnapshotClosure cl(Handle(THREAD, java_thread), thread, with_locks);
2263 if (thread == nullptr) {
2264 // unmounted vthread, execute on the current thread
2265 cl.do_thread(nullptr);
2266 } else {
2267 do {
2268 Handshake::execute(&cl, &tlh, thread);
2269 } while (cl.read_reset_retry());
2270 }
2271
2272 // Convert to StackTraceElement array
2273 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2274 assert(k != nullptr, "must be loaded in 1.4+");
2275 if (k->should_be_initialized()) {
2276 k->initialize(CHECK_NULL);
2277 }
2278
2279 objArrayHandle trace = oopFactory::new_objArray_handle(k, cl._depth, CHECK_NULL);
2280
2281 InstanceKlass* lock_klass = nullptr;
2282 if (with_locks) {
2283 Symbol* sym = vmSymbols::jdk_internal_vm_ThreadLock();
2284 Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK_NULL);
2285 lock_klass = InstanceKlass::cast(k);
2286 }
2287
2288 int max_locks = cl._locks != nullptr ? cl._locks->length() : 0;
2289 for (int i = 0; i < cl._depth; i++) {
2290 methodHandle method(THREAD, cl._methods->at(i));
2291 oop element = java_lang_StackTraceElement::create(method, cl._bcis->at(i), CHECK_NULL);
2292 trace->obj_at_put(i, element);
2293 }
2294 // call static StackTraceElement[] of(StackTraceElement[] stackTrace)
2295 // to properly initialize STE.
2296 {
2297 JavaValue result(T_OBJECT);
2298 JavaCalls::call_static(&result,
2299 k, // vmClasses::StackTraceElement_klass()
2300 vmSymbols::java_lang_StackTraceElement_of_name(),
2301 vmSymbols::java_lang_StackTraceElement_of_signature(),
2302 trace,
2303 CHECK_NULL);
2304 // the method return the same trace object
2305 }
2306
2307 objArrayHandle locks;
2308 int lock_index = 0;
2309 if (with_locks && max_locks > 0) {
2310 locks = oopFactory::new_objArray_handle(lock_klass, max_locks, CHECK_NULL);
2311 for (int n = 0; n < max_locks; n++) {
2312 LockInfo* lock_info = cl._locks->adr_at(lock_index++);
2313 oop o = lock_info->_obj;
2314 Handle lock_object = Handle(THREAD, o);
2315
2316 // TODO: allocate and fill in the VM
2317 JavaCallArguments args;
2318 args.push_int(lock_info->_depth);
2319 args.push_int(lock_info->_type);
2320 args.push_oop(lock_object);
2321 Handle lock = JavaCalls::construct_new_instance(lock_klass,
2322 vmSymbols::jdk_internal_vm_ThreadLock_ctor_signature(), &args, CHECK_NULL);
2323
2324 locks->obj_at_put(n, lock());
2325 }
2326 }
2327
2328 Symbol* snapshot_name = vmSymbols::jdk_internal_vm_ThreadSnapshot();
2329 Klass* snapshot_klass = SystemDictionary::resolve_or_fail(snapshot_name, true, CHECK_NULL);
2330 if (snapshot_klass->should_be_initialized()) {
2331 snapshot_klass->initialize(CHECK_NULL);
2332 }
2333
2334 // TODO: allocate and fill in the VM
2335 JavaCallArguments args;
2336 args.push_oop(trace);
2337 args.push_oop(locks);
2338 //args.push_oop(Handle(THREAD, cl._name));
2339 args.push_int((int)cl._thread_status);
2340 Handle snapshot = JavaCalls::construct_new_instance(InstanceKlass::cast(snapshot_klass),
2341 vmSymbols::jdk_internal_vm_ThreadSnapshot_ctor_signature(), &args, CHECK_NULL);
2342 return snapshot();
2343 }
2344
2345 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2346 JavaThreadStatus status = get_thread_status(java_thread);
2347 switch (status) {
2348 case JavaThreadStatus::NEW : return "NEW";
2349 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
2350 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
2351 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
2352 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2353 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2354 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2355 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2356 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2357 default : return "UNKNOWN";
2358 };
2359 }
2360 int java_lang_ThreadGroup::_parent_offset;
2361 int java_lang_ThreadGroup::_name_offset;
2362 int java_lang_ThreadGroup::_maxPriority_offset;
2363 int java_lang_ThreadGroup::_daemon_offset;
2364
2365 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2366 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2367 return java_thread_group->obj_field(_parent_offset);
2368 }
2369
2370 // ("name as oop" accessor is not necessary)
2371
2372 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2373 oop name = java_thread_group->obj_field(_name_offset);
2374 // ThreadGroup.name can be null
2375 if (name != nullptr) {
2376 return java_lang_String::as_utf8_string(name);
2377 }
2378 return nullptr;
2379 }
2380
2381 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2382 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2383 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2384 }
2385
2386 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2387 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2388 return java_thread_group->bool_field(_daemon_offset) != 0;
2389 }
2390
2391 #define THREADGROUP_FIELDS_DO(macro) \
2392 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2393 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2394 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2395 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2396
2397 void java_lang_ThreadGroup::compute_offsets() {
2398 assert(_parent_offset == 0, "offsets should be initialized only once");
2399
2400 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2401 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2402 }
2403
2404 #if INCLUDE_CDS
2405 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2406 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2407 }
2408 #endif
2409
2410
2411 // java_lang_VirtualThread
2412
2413 int java_lang_VirtualThread::static_vthread_scope_offset;
2414 int java_lang_VirtualThread::_carrierThread_offset;
2415 int java_lang_VirtualThread::_continuation_offset;
2416 int java_lang_VirtualThread::_state_offset;
2417 int java_lang_VirtualThread::_next_offset;
2418 int java_lang_VirtualThread::_onWaitingList_offset;
2419 int java_lang_VirtualThread::_notified_offset;
2420 int java_lang_VirtualThread::_interruptible_wait_offset;
2421 int java_lang_VirtualThread::_timeout_offset;
2422 int java_lang_VirtualThread::_objectWaiter_offset;
2423
2424 #define VTHREAD_FIELDS_DO(macro) \
2425 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2426 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2427 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2428 macro(_state_offset, k, "state", int_signature, false); \
2429 macro(_next_offset, k, "next", vthread_signature, false); \
2430 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2431 macro(_notified_offset, k, "notified", bool_signature, false); \
2432 macro(_interruptible_wait_offset, k, "interruptableWait", bool_signature, false); \
2433 macro(_timeout_offset, k, "timeout", long_signature, false);
2434
2435
2436 void java_lang_VirtualThread::compute_offsets() {
2437 InstanceKlass* k = vmClasses::VirtualThread_klass();
2438 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2439 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2440 }
2441
2442 bool java_lang_VirtualThread::is_instance(oop obj) {
2443 return obj != nullptr && is_subclass(obj->klass());
2444 }
2445
2446 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2447 oop thread = vthread->obj_field(_carrierThread_offset);
2448 return thread;
2449 }
2450
2451 oop java_lang_VirtualThread::continuation(oop vthread) {
2452 oop cont = vthread->obj_field(_continuation_offset);
2453 return cont;
2454 }
2455
2456 int java_lang_VirtualThread::state(oop vthread) {
2457 return vthread->int_field_acquire(_state_offset);
2458 }
2459
2460 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2461 vthread->release_int_field_put(_state_offset, state);
2462 }
2463
2464 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2465 jint* addr = vthread->field_addr<jint>(_state_offset);
2466 int res = Atomic::cmpxchg(addr, old_state, new_state);
2467 return res;
2468 }
2469
2470 oop java_lang_VirtualThread::next(oop vthread) {
2471 return vthread->obj_field(_next_offset);
2472 }
2473
2474 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2475 vthread->obj_field_put(_next_offset, next_vthread);
2476 }
2477
2478 // Add vthread to the waiting list if it's not already in it. Multiple threads
2479 // could be trying to add vthread to the list at the same time, so we control
2480 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2481 // Method returns true if we added vthread to the list, false otherwise.
2482 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2483 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2484 jboolean vthread_on_list = Atomic::load(addr);
2485 if (!vthread_on_list) {
2486 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2487 if (!vthread_on_list) {
2488 for (;;) {
2489 oop head = list_head.resolve();
2490 java_lang_VirtualThread::set_next(vthread, head);
2491 if (list_head.cmpxchg(head, vthread) == head) return true;
2492 }
2493 }
2494 }
2495 return false; // already on waiting list
2496 }
2497
2498 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2499 vthread->bool_field_put_volatile(_notified_offset, value);
2500 }
2501
2502 void java_lang_VirtualThread::set_interruptible_wait(oop vthread, jboolean value) {
2503 vthread->bool_field_put_volatile(_interruptible_wait_offset, value);
2504 }
2505
2506 jlong java_lang_VirtualThread::timeout(oop vthread) {
2507 return vthread->long_field(_timeout_offset);
2508 }
2509
2510 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2511 vthread->long_field_put(_timeout_offset, value);
2512 }
2513
2514 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2515 JavaThreadStatus status = JavaThreadStatus::NEW;
2516 switch (state & ~SUSPENDED) {
2517 case NEW:
2518 status = JavaThreadStatus::NEW;
2519 break;
2520 case STARTED:
2521 case RUNNING:
2522 case PARKING:
2523 case TIMED_PARKING:
2524 case UNPARKED:
2525 case YIELDING:
2526 case YIELDED:
2527 case UNBLOCKED:
2528 case WAITING:
2529 case TIMED_WAITING:
2530 status = JavaThreadStatus::RUNNABLE;
2531 break;
2532 case PARKED:
2533 case PINNED:
2534 status = JavaThreadStatus::PARKED;
2535 break;
2536 case TIMED_PARKED:
2537 case TIMED_PINNED:
2538 status = JavaThreadStatus::PARKED_TIMED;
2539 break;
2540 case BLOCKING:
2541 case BLOCKED:
2542 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2543 break;
2544 case WAIT:
2545 status = JavaThreadStatus::IN_OBJECT_WAIT;
2546 break;
2547 case TIMED_WAIT:
2548 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2549 break;
2550 case TERMINATED:
2551 status = JavaThreadStatus::TERMINATED;
2552 break;
2553 default:
2554 ShouldNotReachHere();
2555 }
2556 return status;
2557 }
2558
2559 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2560 ObjectWaiter* waiter = objectWaiter(vthread);
2561 if (waiter != nullptr && waiter->at_monitorenter()) {
2562 return waiter->monitor();
2563 }
2564 return nullptr;
2565 }
2566
2567 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2568 ObjectWaiter* waiter = objectWaiter(vthread);
2569 if (waiter != nullptr && waiter->is_wait()) {
2570 return waiter->monitor();
2571 }
2572 return nullptr;
2573 }
2574
2575 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2576 oop continuation = java_lang_VirtualThread::continuation(vthread);
2577 assert(continuation != nullptr, "vthread with no continuation");
2578 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2579 return chunk != nullptr && chunk->preempted();
2580 }
2581
2582 #if INCLUDE_CDS
2583 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2584 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2585 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2586 }
2587 #endif
2588
2589 // java_lang_Throwable
2590
2591 int java_lang_Throwable::_backtrace_offset;
2592 int java_lang_Throwable::_detailMessage_offset;
2593 int java_lang_Throwable::_stackTrace_offset;
2594 int java_lang_Throwable::_depth_offset;
2595 int java_lang_Throwable::_cause_offset;
2596 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2597
2598 #define THROWABLE_FIELDS_DO(macro) \
2599 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2600 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2601 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2602 macro(_depth_offset, k, "depth", int_signature, false); \
2603 macro(_cause_offset, k, "cause", throwable_signature, false); \
2604 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2605
2606 void java_lang_Throwable::compute_offsets() {
2607 InstanceKlass* k = vmClasses::Throwable_klass();
2608 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2609 }
2610
2611 #if INCLUDE_CDS
2612 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2613 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2614 }
2615 #endif
2616
2617 oop java_lang_Throwable::unassigned_stacktrace() {
2618 InstanceKlass* ik = vmClasses::Throwable_klass();
2619 oop base = ik->static_field_base_raw();
2620 return base->obj_field(_static_unassigned_stacktrace_offset);
2621 }
2622
2623 oop java_lang_Throwable::backtrace(oop throwable) {
2624 return throwable->obj_field_acquire(_backtrace_offset);
2625 }
2626
2627
2628 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2629 throwable->release_obj_field_put(_backtrace_offset, value);
2630 }
2631
2632 int java_lang_Throwable::depth(oop throwable) {
2633 return throwable->int_field(_depth_offset);
2634 }
2635
2636 void java_lang_Throwable::set_depth(oop throwable, int value) {
2637 throwable->int_field_put(_depth_offset, value);
2638 }
2639
2640 oop java_lang_Throwable::message(oop throwable) {
2641 return throwable->obj_field(_detailMessage_offset);
2642 }
2643
2644 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2645 oop msg = java_lang_Throwable::message(throwable);
2646 const char* msg_utf8 = nullptr;
2647 if (msg != nullptr) {
2648 msg_utf8 = java_lang_String::as_utf8_string(msg);
2649 }
2650 return msg_utf8;
2651 }
2652
2653 oop java_lang_Throwable::cause(oop throwable) {
2654 return throwable->obj_field(_cause_offset);
2655 }
2656
2657 void java_lang_Throwable::set_message(oop throwable, oop value) {
2658 throwable->obj_field_put(_detailMessage_offset, value);
2659 }
2660
2661
2662 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2663 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2664 }
2665
2666 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2667 set_stacktrace(throwable, nullptr);
2668 }
2669
2670
2671 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2672 ResourceMark rm;
2673 Klass* k = throwable->klass();
2674 assert(k != nullptr, "just checking");
2675 st->print("%s", k->external_name());
2676 oop msg = message(throwable);
2677 if (msg != nullptr) {
2678 st->print(": %s", java_lang_String::as_utf8_string(msg));
2679 }
2680 }
2681
2682 // After this many redefines, the stack trace is unreliable.
2683 const int MAX_VERSION = USHRT_MAX;
2684
2685 static inline bool version_matches(Method* method, int version) {
2686 assert(version < MAX_VERSION, "version is too big");
2687 return method != nullptr && (method->constants()->version() == version);
2688 }
2689
2690 // This class provides a simple wrapper over the internal structure of
2691 // exception backtrace to insulate users of the backtrace from needing
2692 // to know what it looks like.
2693 // The code of this class is not GC safe. Allocations can only happen
2694 // in expand().
2695 class BacktraceBuilder: public StackObj {
2696 friend class BacktraceIterator;
2697 private:
2698 Handle _backtrace;
2699 objArrayOop _head;
2700 typeArrayOop _methods;
2701 typeArrayOop _bcis;
2702 objArrayOop _mirrors;
2703 typeArrayOop _names; // Needed to insulate method name against redefinition.
2704 // True if the top frame of the backtrace is omitted because it shall be hidden.
2705 bool _has_hidden_top_frame;
2706 int _index;
2707 NoSafepointVerifier _nsv;
2708
2709 enum {
2710 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2711 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2712 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2713 trace_names_offset = java_lang_Throwable::trace_names_offset,
2714 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2715 trace_next_offset = java_lang_Throwable::trace_next_offset,
2716 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2717 trace_size = java_lang_Throwable::trace_size,
2718 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2719 };
2720
2721 // get info out of chunks
2722 static typeArrayOop get_methods(objArrayHandle chunk) {
2723 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2724 assert(methods != nullptr, "method array should be initialized in backtrace");
2725 return methods;
2726 }
2727 static typeArrayOop get_bcis(objArrayHandle chunk) {
2728 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2729 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2730 return bcis;
2731 }
2732 static objArrayOop get_mirrors(objArrayHandle chunk) {
2733 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2734 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2735 return mirrors;
2736 }
2737 static typeArrayOop get_names(objArrayHandle chunk) {
2738 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2739 assert(names != nullptr, "names array should be initialized in backtrace");
2740 return names;
2741 }
2742 static bool has_hidden_top_frame(objArrayHandle chunk) {
2743 oop hidden = chunk->obj_at(trace_hidden_offset);
2744 return hidden != nullptr;
2745 }
2746
2747 public:
2748
2749 // constructor for new backtrace
2750 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2751 expand(CHECK);
2752 _backtrace = Handle(THREAD, _head);
2753 _index = 0;
2754 }
2755
2756 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2757 _methods = get_methods(backtrace);
2758 _bcis = get_bcis(backtrace);
2759 _mirrors = get_mirrors(backtrace);
2760 _names = get_names(backtrace);
2761 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2762 assert(_methods->length() == _bcis->length() &&
2763 _methods->length() == _mirrors->length() &&
2764 _mirrors->length() == _names->length(),
2765 "method and source information arrays should match");
2766
2767 // head is the preallocated backtrace
2768 _head = backtrace();
2769 _backtrace = Handle(thread, _head);
2770 _index = 0;
2771 }
2772
2773 void expand(TRAPS) {
2774 objArrayHandle old_head(THREAD, _head);
2775 PauseNoSafepointVerifier pnsv(&_nsv);
2776
2777 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2778 objArrayHandle new_head(THREAD, head);
2779
2780 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2781 typeArrayHandle new_methods(THREAD, methods);
2782
2783 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2784 typeArrayHandle new_bcis(THREAD, bcis);
2785
2786 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2787 objArrayHandle new_mirrors(THREAD, mirrors);
2788
2789 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2790 typeArrayHandle new_names(THREAD, names);
2791
2792 if (!old_head.is_null()) {
2793 old_head->obj_at_put(trace_next_offset, new_head());
2794 }
2795 new_head->obj_at_put(trace_methods_offset, new_methods());
2796 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2797 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2798 new_head->obj_at_put(trace_names_offset, new_names());
2799 new_head->obj_at_put(trace_hidden_offset, nullptr);
2800
2801 _head = new_head();
2802 _methods = new_methods();
2803 _bcis = new_bcis();
2804 _mirrors = new_mirrors();
2805 _names = new_names();
2806 _index = 0;
2807 }
2808
2809 oop backtrace() {
2810 return _backtrace();
2811 }
2812
2813 inline void push(Method* method, int bci, TRAPS) {
2814 // Smear the -1 bci to 0 since the array only holds unsigned
2815 // shorts. The later line number lookup would just smear the -1
2816 // to a 0 even if it could be recorded.
2817 if (bci == SynchronizationEntryBCI) bci = 0;
2818
2819 if (_index >= trace_chunk_size) {
2820 methodHandle mhandle(THREAD, method);
2821 expand(CHECK);
2822 method = mhandle();
2823 }
2824
2825 _methods->ushort_at_put(_index, method->orig_method_idnum());
2826 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2827
2828 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2829 // klass owning the symbols alive so their refcounts aren't decremented.
2830 Symbol* name = method->name();
2831 _names->symbol_at_put(_index, name);
2832
2833 // We need to save the mirrors in the backtrace to keep the class
2834 // from being unloaded while we still have this stack trace.
2835 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2836 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2837
2838 _index++;
2839 }
2840
2841 void set_has_hidden_top_frame() {
2842 if (!_has_hidden_top_frame) {
2843 // It would be nice to add java/lang/Boolean::TRUE here
2844 // to indicate that this backtrace has a hidden top frame.
2845 // But this code is used before TRUE is allocated.
2846 // Therefore let's just use an arbitrary legal oop
2847 // available right here. _methods is a short[].
2848 assert(_methods != nullptr, "we need a legal oop");
2849 _has_hidden_top_frame = true;
2850 _head->obj_at_put(trace_hidden_offset, _methods);
2851 }
2852 }
2853 };
2854
2855 struct BacktraceElement : public StackObj {
2856 int _method_id;
2857 int _bci;
2858 int _version;
2859 Symbol* _name;
2860 Handle _mirror;
2861 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2862 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2863 };
2864
2865 class BacktraceIterator : public StackObj {
2866 int _index;
2867 objArrayHandle _result;
2868 objArrayHandle _mirrors;
2869 typeArrayHandle _methods;
2870 typeArrayHandle _bcis;
2871 typeArrayHandle _names;
2872
2873 void init(objArrayHandle result, Thread* thread) {
2874 // Get method id, bci, version and mirror from chunk
2875 _result = result;
2876 if (_result.not_null()) {
2877 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2878 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2879 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2880 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2881 _index = 0;
2882 }
2883 }
2884 public:
2885 BacktraceIterator(objArrayHandle result, Thread* thread) {
2886 init(result, thread);
2887 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2888 }
2889
2890 BacktraceElement next(Thread* thread) {
2891 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2892 _methods->ushort_at(_index),
2893 Backtrace::version_at(_bcis->int_at(_index)),
2894 Backtrace::bci_at(_bcis->int_at(_index)),
2895 _names->symbol_at(_index));
2896 _index++;
2897
2898 if (_index >= java_lang_Throwable::trace_chunk_size) {
2899 int next_offset = java_lang_Throwable::trace_next_offset;
2900 // Get next chunk
2901 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2902 init(result, thread);
2903 }
2904 return e;
2905 }
2906
2907 bool repeat() {
2908 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2909 }
2910 };
2911
2912
2913 // Print stack trace element to resource allocated buffer
2914 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2915 int version, int bci, Symbol* name) {
2916 ResourceMark rm;
2917
2918 // Get strings and string lengths
2919 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2920 const char* klass_name = holder->external_name();
2921 int buf_len = (int)strlen(klass_name);
2922
2923 char* method_name = name->as_C_string();
2924 buf_len += (int)strlen(method_name);
2925
2926 char* source_file_name = nullptr;
2927 Symbol* source = Backtrace::get_source_file_name(holder, version);
2928 if (source != nullptr) {
2929 source_file_name = source->as_C_string();
2930 buf_len += (int)strlen(source_file_name);
2931 }
2932
2933 char *module_name = nullptr, *module_version = nullptr;
2934 ModuleEntry* module = holder->module();
2935 if (module->is_named()) {
2936 module_name = module->name()->as_C_string();
2937 buf_len += (int)strlen(module_name);
2938 if (module->version() != nullptr) {
2939 module_version = module->version()->as_C_string();
2940 buf_len += (int)strlen(module_version);
2941 }
2942 }
2943
2944 // Allocate temporary buffer with extra space for formatting and line number
2945 const size_t buf_size = buf_len + 64;
2946 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2947
2948 // Print stack trace line in buffer
2949 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2950
2951 // Print module information
2952 if (module_name != nullptr) {
2953 if (module_version != nullptr) {
2954 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2955 } else {
2956 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2957 }
2958 }
2959
2960 // The method can be null if the requested class version is gone
2961 Method* method = holder->method_with_orig_idnum(method_id, version);
2962 if (!version_matches(method, version)) {
2963 strcat(buf, "Redefined)");
2964 } else {
2965 int line_number = Backtrace::get_line_number(method, bci);
2966 if (line_number == -2) {
2967 strcat(buf, "Native Method)");
2968 } else {
2969 if (source_file_name != nullptr && (line_number != -1)) {
2970 // Sourcename and linenumber
2971 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2972 } else if (source_file_name != nullptr) {
2973 // Just sourcename
2974 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2975 } else {
2976 // Neither sourcename nor linenumber
2977 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2978 }
2979 nmethod* nm = method->code();
2980 if (WizardMode && nm != nullptr) {
2981 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2982 }
2983 }
2984 }
2985
2986 st->print_cr("%s", buf);
2987 }
2988
2989 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2990 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2991 int method_id = method->orig_method_idnum();
2992 int version = method->constants()->version();
2993 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2994 }
2995
2996 /**
2997 * Print the throwable message and its stack trace plus all causes by walking the
2998 * cause chain. The output looks the same as of Throwable.printStackTrace().
2999 */
3000 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
3001 // First, print the message.
3002 print(throwable(), st);
3003 st->cr();
3004
3005 // Now print the stack trace.
3006 JavaThread* THREAD = JavaThread::current(); // For exception macros.
3007 while (throwable.not_null()) {
3008 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
3009 if (result.is_null()) {
3010 st->print_raw_cr("\t<<no stack trace available>>");
3011 return;
3012 }
3013 BacktraceIterator iter(result, THREAD);
3014
3015 while (iter.repeat()) {
3016 BacktraceElement bte = iter.next(THREAD);
3017 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
3018 }
3019 if (THREAD->can_call_java()) {
3020 // Call getCause() which doesn't necessarily return the _cause field.
3021 ExceptionMark em(THREAD);
3022 JavaValue cause(T_OBJECT);
3023 JavaCalls::call_virtual(&cause,
3024 throwable,
3025 throwable->klass(),
3026 vmSymbols::getCause_name(),
3027 vmSymbols::void_throwable_signature(),
3028 THREAD);
3029 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
3030 if (HAS_PENDING_EXCEPTION) {
3031 CLEAR_PENDING_EXCEPTION;
3032 throwable = Handle();
3033 } else {
3034 throwable = Handle(THREAD, cause.get_oop());
3035 if (throwable.not_null()) {
3036 st->print("Caused by: ");
3037 print(throwable(), st);
3038 st->cr();
3039 }
3040 }
3041 } else {
3042 st->print_raw_cr("<<cannot call Java to get cause>>");
3043 return;
3044 }
3045 }
3046 }
3047
3048 /**
3049 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
3050 */
3051 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
3052 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
3053 JavaValue result(T_VOID);
3054 JavaCalls::call_virtual(&result,
3055 throwable,
3056 vmClasses::Throwable_klass(),
3057 vmSymbols::printStackTrace_name(),
3058 vmSymbols::void_method_signature(),
3059 THREAD);
3060 }
3061
3062 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
3063 if (!StackTraceInThrowable) return;
3064 ResourceMark rm(THREAD);
3065
3066 // Start out by clearing the backtrace for this object, in case the VM
3067 // runs out of memory while allocating the stack trace
3068 set_backtrace(throwable(), nullptr);
3069 // Clear lazily constructed Java level stacktrace if refilling occurs
3070 // This is unnecessary in 1.7+ but harmless
3071 clear_stacktrace(throwable());
3072
3073 int max_depth = MaxJavaStackTraceDepth;
3074 JavaThread* thread = THREAD;
3075
3076 BacktraceBuilder bt(CHECK);
3077
3078 // If there is no Java frame just return the method that was being called
3079 // with bci 0
3080 if (!thread->has_last_Java_frame()) {
3081 if (max_depth >= 1 && method() != nullptr) {
3082 bt.push(method(), 0, CHECK);
3083 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
3084 set_depth(throwable(), 1);
3085 set_backtrace(throwable(), bt.backtrace());
3086 }
3087 return;
3088 }
3089
3090 // Instead of using vframe directly, this version of fill_in_stack_trace
3091 // basically handles everything by hand. This significantly improved the
3092 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
3093 // See bug 6333838 for more details.
3094 // The "ASSERT" here is to verify this method generates the exactly same stack
3095 // trace as utilizing vframe.
3096 #ifdef ASSERT
3097 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
3098 #endif
3099 int total_count = 0;
3100 RegisterMap map(thread,
3101 RegisterMap::UpdateMap::skip,
3102 RegisterMap::ProcessFrames::skip,
3103 RegisterMap::WalkContinuation::include);
3104 int decode_offset = 0;
3105 nmethod* nm = nullptr;
3106 bool skip_fillInStackTrace_check = false;
3107 bool skip_throwableInit_check = false;
3108 bool skip_hidden = !ShowHiddenFrames;
3109 bool show_carrier = ShowCarrierFrames;
3110 ContinuationEntry* cont_entry = thread->last_continuation();
3111 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
3112 Method* method = nullptr;
3113 int bci = 0;
3114
3115 // Compiled java method case.
3116 if (decode_offset != 0) {
3117 DebugInfoReadStream stream(nm, decode_offset);
3118 decode_offset = stream.read_int();
3119 method = (Method*)nm->metadata_at(stream.read_int());
3120 bci = stream.read_bci();
3121 } else {
3122 if (fr.is_first_frame()) break;
3123
3124 if (Continuation::is_continuation_enterSpecial(fr)) {
3125 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
3126 if (!show_carrier && cont_entry->is_virtual_thread()) {
3127 break;
3128 }
3129 cont_entry = cont_entry->parent();
3130 }
3131
3132 address pc = fr.pc();
3133 if (fr.is_interpreted_frame()) {
3134 address bcp;
3135 if (!map.in_cont()) {
3136 bcp = fr.interpreter_frame_bcp();
3137 method = fr.interpreter_frame_method();
3138 } else {
3139 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
3140 method = map.stack_chunk()->interpreter_frame_method(fr);
3141 }
3142 bci = method->bci_from(bcp);
3143 fr = fr.sender(&map);
3144 } else {
3145 CodeBlob* cb = fr.cb();
3146 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
3147 // but non nmethod
3148 fr = fr.sender(&map);
3149 if (cb == nullptr || !cb->is_nmethod()) {
3150 continue;
3151 }
3152 nm = cb->as_nmethod();
3153 assert(nm->method() != nullptr, "must be");
3154 if (nm->method()->is_native()) {
3155 method = nm->method();
3156 bci = 0;
3157 } else {
3158 PcDesc* pd = nm->pc_desc_at(pc);
3159 decode_offset = pd->scope_decode_offset();
3160 // if decode_offset is not equal to 0, it will execute the
3161 // "compiled java method case" at the beginning of the loop.
3162 continue;
3163 }
3164 }
3165 }
3166 #ifdef ASSERT
3167 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
3168 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
3169 st.next();
3170 }
3171 #endif
3172
3173 // the format of the stacktrace will be:
3174 // - 1 or more fillInStackTrace frames for the exception class (skipped)
3175 // - 0 or more <init> methods for the exception class (skipped)
3176 // - rest of the stack
3177
3178 if (!skip_fillInStackTrace_check) {
3179 if (method->name() == vmSymbols::fillInStackTrace_name() &&
3180 throwable->is_a(method->method_holder())) {
3181 continue;
3182 }
3183 else {
3184 skip_fillInStackTrace_check = true; // gone past them all
3185 }
3186 }
3187 if (!skip_throwableInit_check) {
3188 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
3189
3190 // skip <init> methods of the exception class and superclasses
3191 // This is similar to classic VM.
3192 if (method->name() == vmSymbols::object_initializer_name() &&
3193 throwable->is_a(method->method_holder())) {
3194 continue;
3195 } else {
3196 // there are none or we've seen them all - either way stop checking
3197 skip_throwableInit_check = true;
3198 }
3199 }
3200 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
3201 if (skip_hidden) {
3202 if (total_count == 0) {
3203 // The top frame will be hidden from the stack trace.
3204 bt.set_has_hidden_top_frame();
3205 }
3206 continue;
3207 }
3208 }
3209
3210 bt.push(method, bci, CHECK);
3211 total_count++;
3212 }
3213
3214 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
3215
3216 // Put completed stack trace into throwable object
3217 set_backtrace(throwable(), bt.backtrace());
3218 set_depth(throwable(), total_count);
3219 }
3220
3221 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
3222 // No-op if stack trace is disabled
3223 if (!StackTraceInThrowable) {
3224 return;
3225 }
3226
3227 // Disable stack traces for some preallocated out of memory errors
3228 if (!Universe::should_fill_in_stack_trace(throwable)) {
3229 return;
3230 }
3231
3232 JavaThread* THREAD = JavaThread::current(); // For exception macros.
3233 PreserveExceptionMark pm(THREAD);
3234
3235 fill_in_stack_trace(throwable, method, THREAD);
3236 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
3237 // original exception via the PreserveExceptionMark destructor.
3238 CLEAR_PENDING_EXCEPTION;
3239 }
3240
3241 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
3242 // Allocate stack trace - backtrace is created but not filled in
3243
3244 // No-op if stack trace is disabled
3245 if (!StackTraceInThrowable) return;
3246 BacktraceBuilder bt(CHECK); // creates a backtrace
3247 set_backtrace(throwable(), bt.backtrace());
3248 }
3249
3250
3251 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
3252 // Fill in stack trace into preallocated backtrace (no GC)
3253
3254 // No-op if stack trace is disabled
3255 if (!StackTraceInThrowable) return;
3256
3257 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
3258
3259 JavaThread* THREAD = JavaThread::current(); // For exception macros.
3260
3261 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
3262 assert(backtrace.not_null(), "backtrace should have been preallocated");
3263
3264 ResourceMark rm(THREAD);
3265 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
3266
3267 BacktraceBuilder bt(THREAD, backtrace);
3268
3269 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
3270 // methods as preallocated errors aren't created by "java" code.
3271
3272 // fill in as much stack trace as possible
3273 int chunk_count = 0;
3274 for (;!st.at_end(); st.next()) {
3275 bt.push(st.method(), st.bci(), CHECK);
3276 chunk_count++;
3277
3278 // Bail-out for deep stacks
3279 if (chunk_count >= trace_chunk_size) break;
3280 }
3281 set_depth(throwable(), chunk_count);
3282 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
3283
3284 // We support the Throwable immutability protocol defined for Java 7.
3285 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
3286 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
3287 }
3288
3289 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
3290 objArrayHandle stack_trace_array_h, TRAPS) {
3291
3292 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
3293 THROW(vmSymbols::java_lang_NullPointerException());
3294 }
3295
3296 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
3297
3298 if (stack_trace_array_h->length() != depth) {
3299 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
3300 }
3301
3302 objArrayHandle result(THREAD, objArrayOop(backtrace()));
3303 BacktraceIterator iter(result, THREAD);
3304
3305 int index = 0;
3306 while (iter.repeat()) {
3307 BacktraceElement bte = iter.next(THREAD);
3308
3309 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
3310
3311 if (stack_trace_element.is_null()) {
3312 THROW(vmSymbols::java_lang_NullPointerException());
3313 }
3314
3315 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3316 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
3317
3318 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
3319 method,
3320 bte._version,
3321 bte._bci,
3322 bte._name,
3323 CHECK);
3324 }
3325 }
3326
3327 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
3328 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
3329 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
3330 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
3331 // symbolic stacktrace of 'throwable'.
3332 assert(throwable.not_null(), "shouldn't be");
3333
3334 // Now create the message from the original exception and thread name.
3335 ResourceMark rm(current);
3336 const char *message = nullptr;
3337 oop detailed_message = java_lang_Throwable::message(throwable());
3338 if (detailed_message != nullptr) {
3339 message = java_lang_String::as_utf8_string(detailed_message);
3340 }
3341 stringStream st;
3342 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3343 message == nullptr ? "" : ":");
3344 if (message == nullptr) {
3345 st.print("[in thread \"%s\"]", current->name());
3346 } else {
3347 st.print("%s [in thread \"%s\"]", message, current->name());
3348 }
3349
3350 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3351 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3352 // If new_exception returns a different exception while creating the exception,
3353 // abandon the attempt to save the initialization error and return null.
3354 if (init_error->klass()->name() != exception_name) {
3355 log_info(class, init)("Exception %s thrown while saving initialization exception",
3356 init_error->klass()->external_name());
3357 return Handle();
3358 }
3359
3360 // Call to java to fill in the stack trace and clear declaringClassObject to
3361 // not keep classes alive in the stack trace.
3362 // call this: public StackTraceElement[] getStackTrace()
3363 JavaValue result(T_ARRAY);
3364 JavaCalls::call_virtual(&result, throwable,
3365 vmClasses::Throwable_klass(),
3366 vmSymbols::getStackTrace_name(),
3367 vmSymbols::getStackTrace_signature(),
3368 current);
3369 if (!current->has_pending_exception()){
3370 Handle stack_trace(current, result.get_oop());
3371 assert(stack_trace->is_objArray(), "Should be an array");
3372 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3373 // Clear backtrace because the stacktrace should be used instead.
3374 set_backtrace(init_error(), nullptr);
3375 } else {
3376 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3377 init_error->klass()->external_name());
3378 current->clear_pending_exception();
3379 }
3380
3381 return init_error;
3382 }
3383
3384 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3385 JavaThread* current = JavaThread::current();
3386 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3387 BacktraceIterator iter(result, current);
3388 // No backtrace available.
3389 if (!iter.repeat()) return false;
3390
3391 // If the exception happened in a frame that has been hidden, i.e.,
3392 // omitted from the back trace, we can not compute the message.
3393 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3394 if (hidden != nullptr) {
3395 return false;
3396 }
3397
3398 // Get first backtrace element.
3399 BacktraceElement bte = iter.next(current);
3400
3401 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3402 assert(holder != nullptr, "first element should be non-null");
3403 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3404
3405 // Original version is no longer available.
3406 if (m == nullptr || !version_matches(m, bte._version)) {
3407 return false;
3408 }
3409
3410 *method = m;
3411 *bci = bte._bci;
3412 return true;
3413 }
3414
3415 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3416 // Allocate java.lang.StackTraceElement instance
3417 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3418 assert(k != nullptr, "must be loaded in 1.4+");
3419 if (k->should_be_initialized()) {
3420 k->initialize(CHECK_NULL);
3421 }
3422
3423 Handle element = k->allocate_instance_handle(CHECK_NULL);
3424
3425 int version = method->constants()->version();
3426 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3427 return element();
3428 }
3429
3430 void java_lang_StackTraceElement::fill_in(Handle element,
3431 InstanceKlass* holder, const methodHandle& method,
3432 int version, int bci, Symbol* name, TRAPS) {
3433 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3434
3435 ResourceMark rm(THREAD);
3436 HandleMark hm(THREAD);
3437
3438 // Fill in class name
3439 Handle java_class(THREAD, holder->java_mirror());
3440 oop classname = java_lang_Class::name(java_class, CHECK);
3441 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3442 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3443
3444 oop loader = holder->class_loader();
3445 if (loader != nullptr) {
3446 oop loader_name = java_lang_ClassLoader::name(loader);
3447 if (loader_name != nullptr)
3448 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3449 }
3450
3451 // Fill in method name
3452 oop methodname = StringTable::intern(name, CHECK);
3453 java_lang_StackTraceElement::set_methodName(element(), methodname);
3454
3455 // Fill in module name and version
3456 ModuleEntry* module = holder->module();
3457 if (module->is_named()) {
3458 oop module_name = StringTable::intern(module->name(), CHECK);
3459 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3460 oop module_version;
3461 if (module->version() != nullptr) {
3462 module_version = StringTable::intern(module->version(), CHECK);
3463 } else {
3464 module_version = nullptr;
3465 }
3466 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3467 }
3468
3469 if (method() == nullptr || !version_matches(method(), version)) {
3470 // The method was redefined, accurate line number information isn't available
3471 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3472 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3473 } else {
3474 Symbol* source;
3475 oop source_file;
3476 int line_number;
3477 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3478
3479 java_lang_StackTraceElement::set_fileName(element(), source_file);
3480 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3481 }
3482 }
3483
3484 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3485 InstanceKlass* holder,
3486 int version,
3487 const methodHandle& method,
3488 int bci,
3489 Symbol*& source,
3490 oop& source_file,
3491 int& line_number, TRAPS) {
3492 // Fill in source file name and line number.
3493 source = Backtrace::get_source_file_name(holder, version);
3494 source_file = java_lang_Class::source_file(java_class());
3495 if (source != nullptr) {
3496 // Class was not redefined. We can trust its cache if set,
3497 // else we have to initialize it.
3498 if (source_file == nullptr) {
3499 source_file = StringTable::intern(source, CHECK);
3500 java_lang_Class::set_source_file(java_class(), source_file);
3501 }
3502 } else {
3503 // Class was redefined. Dump the cache if it was set.
3504 if (source_file != nullptr) {
3505 source_file = nullptr;
3506 java_lang_Class::set_source_file(java_class(), source_file);
3507 }
3508 }
3509 line_number = Backtrace::get_line_number(method(), bci);
3510 }
3511
3512 #if INCLUDE_JVMCI
3513 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3514 Symbol*& filename, int& line_number, TRAPS) {
3515 ResourceMark rm(THREAD);
3516 HandleMark hm(THREAD);
3517
3518 filename = nullptr;
3519 line_number = -1;
3520
3521 oop source_file;
3522 int version = method->constants()->version();
3523 InstanceKlass* holder = method->method_holder();
3524 Handle java_class(THREAD, holder->java_mirror());
3525 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3526 }
3527 #endif // INCLUDE_JVMCI
3528
3529 // java_lang_ClassFrameInfo
3530
3531 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3532 int java_lang_ClassFrameInfo::_flags_offset;
3533
3534 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3535 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3536 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3537
3538 void java_lang_ClassFrameInfo::compute_offsets() {
3539 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3540 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3541 }
3542
3543 #if INCLUDE_CDS
3544 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3545 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3546 }
3547 #endif
3548
3549 static int get_flags(const methodHandle& m) {
3550 int flags = m->access_flags().as_method_flags();
3551 if (m->is_object_initializer()) {
3552 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3553 } else {
3554 // Note: Static initializers can be here. Record them as plain methods.
3555 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3556 }
3557 if (m->caller_sensitive()) {
3558 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3559 }
3560 if (m->is_hidden()) {
3561 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3562 }
3563 assert((flags & 0xFF000000) == 0, "unexpected flags");
3564 return flags;
3565 }
3566
3567 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3568 return obj->obj_field(_classOrMemberName_offset);
3569 }
3570
3571 int java_lang_ClassFrameInfo::flags(oop obj) {
3572 return obj->int_field(_flags_offset);
3573 }
3574
3575 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3576 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3577 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3578 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3579 stackFrame->int_field_put(_flags_offset, flags);
3580 }
3581
3582 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3583 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3584 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3585 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3586 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3587 stackFrame->int_field_put(_flags_offset, flags);
3588 }
3589
3590
3591 // java_lang_StackFrameInfo
3592
3593 int java_lang_StackFrameInfo::_type_offset;
3594 int java_lang_StackFrameInfo::_name_offset;
3595 int java_lang_StackFrameInfo::_bci_offset;
3596 int java_lang_StackFrameInfo::_version_offset;
3597 int java_lang_StackFrameInfo::_contScope_offset;
3598
3599 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3600 macro(_type_offset, k, "type", object_signature, false); \
3601 macro(_name_offset, k, "name", string_signature, false); \
3602 macro(_bci_offset, k, "bci", int_signature, false); \
3603 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3604
3605 void java_lang_StackFrameInfo::compute_offsets() {
3606 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3607 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3608 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3609 }
3610
3611 #if INCLUDE_CDS
3612 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3613 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3614 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3615 }
3616 #endif
3617
3618 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3619 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3620 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3621 return method;
3622 }
3623
3624 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3625 // set Method* or mid/cpref
3626 HandleMark hm(THREAD);
3627 Handle cont_h(THREAD, cont);
3628 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3629
3630 // set bci
3631 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3632 // method may be redefined; store the version
3633 int version = method->constants()->version();
3634 assert((jushort)version == version, "version should be short");
3635 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3636
3637 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3638 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3639 }
3640
3641 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3642 ResourceMark rm(THREAD);
3643 HandleMark hm(THREAD);
3644
3645 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3646 InstanceKlass* holder = method->method_holder();
3647 short version = stackFrame->short_field(_version_offset);
3648 int bci = stackFrame->int_field(_bci_offset);
3649 Symbol* name = method->name();
3650 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3651 }
3652
3653 oop java_lang_StackFrameInfo::type(oop obj) {
3654 return obj->obj_field(_type_offset);
3655 }
3656
3657 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3658 obj->obj_field_put(_type_offset, value);
3659 }
3660
3661 oop java_lang_StackFrameInfo::name(oop obj) {
3662 return obj->obj_field(_name_offset);
3663 }
3664
3665 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3666 obj->obj_field_put(_name_offset, value);
3667 }
3668
3669 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3670 obj->short_field_put(_version_offset, value);
3671 }
3672
3673 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3674 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3675 obj->int_field_put(_bci_offset, value);
3676 }
3677
3678 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3679 obj->obj_field_put(_contScope_offset, value);
3680 }
3681
3682 int java_lang_LiveStackFrameInfo::_monitors_offset;
3683 int java_lang_LiveStackFrameInfo::_locals_offset;
3684 int java_lang_LiveStackFrameInfo::_operands_offset;
3685 int java_lang_LiveStackFrameInfo::_mode_offset;
3686
3687 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3688 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3689 macro(_locals_offset, k, "locals", object_array_signature, false); \
3690 macro(_operands_offset, k, "operands", object_array_signature, false); \
3691 macro(_mode_offset, k, "mode", int_signature, false)
3692
3693 void java_lang_LiveStackFrameInfo::compute_offsets() {
3694 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3695 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3696 }
3697
3698 #if INCLUDE_CDS
3699 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3700 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3701 }
3702 #endif
3703
3704 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3705 obj->obj_field_put(_monitors_offset, value);
3706 }
3707
3708 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3709 obj->obj_field_put(_locals_offset, value);
3710 }
3711
3712 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3713 obj->obj_field_put(_operands_offset, value);
3714 }
3715
3716 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3717 obj->int_field_put(_mode_offset, value);
3718 }
3719
3720 // java_lang_AccessibleObject
3721
3722 int java_lang_reflect_AccessibleObject::_override_offset;
3723
3724 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3725 macro(_override_offset, k, "override", bool_signature, false)
3726
3727 void java_lang_reflect_AccessibleObject::compute_offsets() {
3728 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3729 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3730 }
3731
3732 #if INCLUDE_CDS
3733 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3734 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3735 }
3736 #endif
3737
3738 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3739 return (jboolean) reflect->bool_field(_override_offset);
3740 }
3741
3742 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3743 reflect->bool_field_put(_override_offset, (int) value);
3744 }
3745
3746 // java_lang_reflect_Method
3747
3748 int java_lang_reflect_Method::_clazz_offset;
3749 int java_lang_reflect_Method::_name_offset;
3750 int java_lang_reflect_Method::_returnType_offset;
3751 int java_lang_reflect_Method::_parameterTypes_offset;
3752 int java_lang_reflect_Method::_exceptionTypes_offset;
3753 int java_lang_reflect_Method::_slot_offset;
3754 int java_lang_reflect_Method::_modifiers_offset;
3755 int java_lang_reflect_Method::_signature_offset;
3756 int java_lang_reflect_Method::_annotations_offset;
3757 int java_lang_reflect_Method::_parameter_annotations_offset;
3758 int java_lang_reflect_Method::_annotation_default_offset;
3759
3760 #define METHOD_FIELDS_DO(macro) \
3761 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3762 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3763 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3764 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3765 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3766 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3767 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3768 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3769 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3770 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3771 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3772
3773 void java_lang_reflect_Method::compute_offsets() {
3774 InstanceKlass* k = vmClasses::reflect_Method_klass();
3775 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3776 }
3777
3778 #if INCLUDE_CDS
3779 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3780 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3781 }
3782 #endif
3783
3784 Handle java_lang_reflect_Method::create(TRAPS) {
3785 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3786 Klass* klass = vmClasses::reflect_Method_klass();
3787 // This class is eagerly initialized during VM initialization, since we keep a reference
3788 // to one of the methods
3789 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3790 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3791 }
3792
3793 oop java_lang_reflect_Method::clazz(oop reflect) {
3794 return reflect->obj_field(_clazz_offset);
3795 }
3796
3797 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3798 reflect->obj_field_put(_clazz_offset, value);
3799 }
3800
3801 int java_lang_reflect_Method::slot(oop reflect) {
3802 return reflect->int_field(_slot_offset);
3803 }
3804
3805 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3806 reflect->int_field_put(_slot_offset, value);
3807 }
3808
3809 void java_lang_reflect_Method::set_name(oop method, oop value) {
3810 method->obj_field_put(_name_offset, value);
3811 }
3812
3813 oop java_lang_reflect_Method::return_type(oop method) {
3814 return method->obj_field(_returnType_offset);
3815 }
3816
3817 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3818 method->obj_field_put(_returnType_offset, value);
3819 }
3820
3821 oop java_lang_reflect_Method::parameter_types(oop method) {
3822 return method->obj_field(_parameterTypes_offset);
3823 }
3824
3825 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3826 method->obj_field_put(_parameterTypes_offset, value);
3827 }
3828
3829 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3830 method->obj_field_put(_exceptionTypes_offset, value);
3831 }
3832
3833 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3834 method->int_field_put(_modifiers_offset, value);
3835 }
3836
3837 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3838 method->obj_field_put(_signature_offset, value);
3839 }
3840
3841 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3842 method->obj_field_put(_annotations_offset, value);
3843 }
3844
3845 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3846 method->obj_field_put(_parameter_annotations_offset, value);
3847 }
3848
3849 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3850 method->obj_field_put(_annotation_default_offset, value);
3851 }
3852
3853 int java_lang_reflect_Constructor::_clazz_offset;
3854 int java_lang_reflect_Constructor::_parameterTypes_offset;
3855 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3856 int java_lang_reflect_Constructor::_slot_offset;
3857 int java_lang_reflect_Constructor::_modifiers_offset;
3858 int java_lang_reflect_Constructor::_signature_offset;
3859 int java_lang_reflect_Constructor::_annotations_offset;
3860 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3861
3862 #define CONSTRUCTOR_FIELDS_DO(macro) \
3863 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3864 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3865 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3866 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3867 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3868 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3869 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3870 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3871
3872 void java_lang_reflect_Constructor::compute_offsets() {
3873 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3874 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3875 }
3876
3877 #if INCLUDE_CDS
3878 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3879 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3880 }
3881 #endif
3882
3883 Handle java_lang_reflect_Constructor::create(TRAPS) {
3884 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3885 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3886 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3887 InstanceKlass* ik = InstanceKlass::cast(k);
3888 // Ensure it is initialized
3889 ik->initialize(CHECK_NH);
3890 return ik->allocate_instance_handle(THREAD);
3891 }
3892
3893 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3894 return reflect->obj_field(_clazz_offset);
3895 }
3896
3897 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3898 reflect->obj_field_put(_clazz_offset, value);
3899 }
3900
3901 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3902 return constructor->obj_field(_parameterTypes_offset);
3903 }
3904
3905 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3906 constructor->obj_field_put(_parameterTypes_offset, value);
3907 }
3908
3909 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3910 constructor->obj_field_put(_exceptionTypes_offset, value);
3911 }
3912
3913 int java_lang_reflect_Constructor::slot(oop reflect) {
3914 return reflect->int_field(_slot_offset);
3915 }
3916
3917 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3918 reflect->int_field_put(_slot_offset, value);
3919 }
3920
3921 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3922 constructor->int_field_put(_modifiers_offset, value);
3923 }
3924
3925 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3926 constructor->obj_field_put(_signature_offset, value);
3927 }
3928
3929 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3930 constructor->obj_field_put(_annotations_offset, value);
3931 }
3932
3933 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3934 method->obj_field_put(_parameter_annotations_offset, value);
3935 }
3936
3937 int java_lang_reflect_Field::_clazz_offset;
3938 int java_lang_reflect_Field::_name_offset;
3939 int java_lang_reflect_Field::_type_offset;
3940 int java_lang_reflect_Field::_slot_offset;
3941 int java_lang_reflect_Field::_modifiers_offset;
3942 int java_lang_reflect_Field::_trusted_final_offset;
3943 int java_lang_reflect_Field::_signature_offset;
3944 int java_lang_reflect_Field::_annotations_offset;
3945
3946 #define FIELD_FIELDS_DO(macro) \
3947 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3948 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3949 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3950 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3951 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3952 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3953 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3954 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3955
3956 void java_lang_reflect_Field::compute_offsets() {
3957 InstanceKlass* k = vmClasses::reflect_Field_klass();
3958 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3959 }
3960
3961 #if INCLUDE_CDS
3962 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3963 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3964 }
3965 #endif
3966
3967 Handle java_lang_reflect_Field::create(TRAPS) {
3968 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3969 Symbol* name = vmSymbols::java_lang_reflect_Field();
3970 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3971 InstanceKlass* ik = InstanceKlass::cast(k);
3972 // Ensure it is initialized
3973 ik->initialize(CHECK_NH);
3974 return ik->allocate_instance_handle(THREAD);
3975 }
3976
3977 oop java_lang_reflect_Field::clazz(oop reflect) {
3978 return reflect->obj_field(_clazz_offset);
3979 }
3980
3981 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3982 reflect->obj_field_put(_clazz_offset, value);
3983 }
3984
3985 oop java_lang_reflect_Field::name(oop field) {
3986 return field->obj_field(_name_offset);
3987 }
3988
3989 void java_lang_reflect_Field::set_name(oop field, oop value) {
3990 field->obj_field_put(_name_offset, value);
3991 }
3992
3993 oop java_lang_reflect_Field::type(oop field) {
3994 return field->obj_field(_type_offset);
3995 }
3996
3997 void java_lang_reflect_Field::set_type(oop field, oop value) {
3998 field->obj_field_put(_type_offset, value);
3999 }
4000
4001 int java_lang_reflect_Field::slot(oop reflect) {
4002 return reflect->int_field(_slot_offset);
4003 }
4004
4005 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
4006 reflect->int_field_put(_slot_offset, value);
4007 }
4008
4009 int java_lang_reflect_Field::modifiers(oop field) {
4010 return field->int_field(_modifiers_offset);
4011 }
4012
4013 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
4014 field->int_field_put(_modifiers_offset, value);
4015 }
4016
4017 void java_lang_reflect_Field::set_trusted_final(oop field) {
4018 field->bool_field_put(_trusted_final_offset, true);
4019 }
4020
4021 void java_lang_reflect_Field::set_signature(oop field, oop value) {
4022 field->obj_field_put(_signature_offset, value);
4023 }
4024
4025 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
4026 field->obj_field_put(_annotations_offset, value);
4027 }
4028
4029 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
4030 // Allocate java.lang.reflect.RecordComponent instance
4031 HandleMark hm(THREAD);
4032 InstanceKlass* ik = vmClasses::RecordComponent_klass();
4033 assert(ik != nullptr, "must be loaded");
4034 ik->initialize(CHECK_NULL);
4035
4036 Handle element = ik->allocate_instance_handle(CHECK_NULL);
4037
4038 Handle decl_class(THREAD, holder->java_mirror());
4039 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
4040
4041 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
4042 oop component_name = StringTable::intern(name, CHECK_NULL);
4043 java_lang_reflect_RecordComponent::set_name(element(), component_name);
4044
4045 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
4046 Handle component_type_h =
4047 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
4048 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
4049
4050 Method* accessor_method = nullptr;
4051 {
4052 // Prepend "()" to type to create the full method signature.
4053 ResourceMark rm(THREAD);
4054 int sig_len = type->utf8_length() + 3; // "()" and null char
4055 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
4056 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
4057 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
4058 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
4059 }
4060
4061 if (accessor_method != nullptr) {
4062 methodHandle method(THREAD, accessor_method);
4063 oop m = Reflection::new_method(method, false, CHECK_NULL);
4064 java_lang_reflect_RecordComponent::set_accessor(element(), m);
4065 } else {
4066 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
4067 }
4068
4069 int sig_index = component->generic_signature_index();
4070 if (sig_index > 0) {
4071 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
4072 oop component_sig = StringTable::intern(sig, CHECK_NULL);
4073 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
4074 } else {
4075 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
4076 }
4077
4078 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
4079 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
4080
4081 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
4082 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
4083
4084 return element();
4085 }
4086
4087 int reflect_ConstantPool::_oop_offset;
4088
4089 #define CONSTANTPOOL_FIELDS_DO(macro) \
4090 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
4091
4092 void reflect_ConstantPool::compute_offsets() {
4093 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
4094 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
4095 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4096 }
4097
4098 #if INCLUDE_CDS
4099 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
4100 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4101 }
4102 #endif
4103
4104 int java_lang_reflect_Parameter::_name_offset;
4105 int java_lang_reflect_Parameter::_modifiers_offset;
4106 int java_lang_reflect_Parameter::_index_offset;
4107 int java_lang_reflect_Parameter::_executable_offset;
4108
4109 #define PARAMETER_FIELDS_DO(macro) \
4110 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4111 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
4112 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
4113 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
4114
4115 void java_lang_reflect_Parameter::compute_offsets() {
4116 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
4117 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4118 }
4119
4120 #if INCLUDE_CDS
4121 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
4122 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4123 }
4124 #endif
4125
4126 Handle java_lang_reflect_Parameter::create(TRAPS) {
4127 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
4128 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
4129 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
4130 InstanceKlass* ik = InstanceKlass::cast(k);
4131 // Ensure it is initialized
4132 ik->initialize(CHECK_NH);
4133 return ik->allocate_instance_handle(THREAD);
4134 }
4135
4136 oop java_lang_reflect_Parameter::name(oop param) {
4137 return param->obj_field(_name_offset);
4138 }
4139
4140 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
4141 param->obj_field_put(_name_offset, value);
4142 }
4143
4144 int java_lang_reflect_Parameter::modifiers(oop param) {
4145 return param->int_field(_modifiers_offset);
4146 }
4147
4148 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
4149 param->int_field_put(_modifiers_offset, value);
4150 }
4151
4152 int java_lang_reflect_Parameter::index(oop param) {
4153 return param->int_field(_index_offset);
4154 }
4155
4156 void java_lang_reflect_Parameter::set_index(oop param, int value) {
4157 param->int_field_put(_index_offset, value);
4158 }
4159
4160 oop java_lang_reflect_Parameter::executable(oop param) {
4161 return param->obj_field(_executable_offset);
4162 }
4163
4164 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
4165 param->obj_field_put(_executable_offset, value);
4166 }
4167
4168 // java_lang_Module
4169
4170 int java_lang_Module::_loader_offset;
4171 int java_lang_Module::_name_offset;
4172 int java_lang_Module::_module_entry_offset;
4173
4174 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
4175 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
4176 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
4177 vmSymbols::java_lang_module_init_signature(),
4178 loader, module_name, CHECK_NH);
4179 }
4180
4181 #define MODULE_FIELDS_DO(macro) \
4182 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
4183 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
4184
4185 void java_lang_Module::compute_offsets() {
4186 InstanceKlass* k = vmClasses::Module_klass();
4187 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4188 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4189 }
4190
4191 #if INCLUDE_CDS
4192 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
4193 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4194 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4195 }
4196 #endif
4197
4198 oop java_lang_Module::loader(oop module) {
4199 return module->obj_field(_loader_offset);
4200 }
4201
4202 void java_lang_Module::set_loader(oop module, oop value) {
4203 module->obj_field_put(_loader_offset, value);
4204 }
4205
4206 oop java_lang_Module::name(oop module) {
4207 return module->obj_field(_name_offset);
4208 }
4209
4210 void java_lang_Module::set_name(oop module, oop value) {
4211 module->obj_field_put(_name_offset, value);
4212 }
4213
4214 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
4215 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
4216 assert(module != nullptr, "module can't be null");
4217 assert(oopDesc::is_oop(module), "module must be oop");
4218
4219 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
4220 return module_entry;
4221 }
4222
4223 ModuleEntry* java_lang_Module::module_entry(oop module) {
4224 ModuleEntry* module_entry = module_entry_raw(module);
4225 if (module_entry == nullptr) {
4226 // If the inject field containing the ModuleEntry* is null then return the
4227 // class loader's unnamed module.
4228 oop loader = java_lang_Module::loader(module);
4229 Handle h_loader = Handle(Thread::current(), loader);
4230 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
4231 return loader_cld->unnamed_module();
4232 }
4233 return module_entry;
4234 }
4235
4236 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
4237 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
4238 assert(module != nullptr, "module can't be null");
4239 assert(oopDesc::is_oop(module), "module must be oop");
4240 module->address_field_put(_module_entry_offset, (address)module_entry);
4241 }
4242
4243 Handle reflect_ConstantPool::create(TRAPS) {
4244 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
4245 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
4246 // Ensure it is initialized
4247 k->initialize(CHECK_NH);
4248 return k->allocate_instance_handle(THREAD);
4249 }
4250
4251
4252 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
4253 oop mirror = value->pool_holder()->java_mirror();
4254 // Save the mirror to get back the constant pool.
4255 reflect->obj_field_put(_oop_offset, mirror);
4256 }
4257
4258 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
4259
4260 oop mirror = reflect->obj_field(_oop_offset);
4261 Klass* k = java_lang_Class::as_Klass(mirror);
4262 assert(k->is_instance_klass(), "Must be");
4263
4264 // Get the constant pool back from the klass. Since class redefinition
4265 // merges the new constant pool into the old, this is essentially the
4266 // same constant pool as the original. If constant pool merging is
4267 // no longer done in the future, this will have to change to save
4268 // the original.
4269 return InstanceKlass::cast(k)->constants();
4270 }
4271
4272
4273 // Support for java_lang_ref_Reference
4274
4275 bool java_lang_ref_Reference::_offsets_initialized;
4276
4277 int java_lang_ref_Reference::_referent_offset;
4278 int java_lang_ref_Reference::_queue_offset;
4279 int java_lang_ref_Reference::_next_offset;
4280 int java_lang_ref_Reference::_discovered_offset;
4281
4282 #define REFERENCE_FIELDS_DO(macro) \
4283 macro(_referent_offset, k, "referent", object_signature, false); \
4284 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
4285 macro(_next_offset, k, "next", reference_signature, false); \
4286 macro(_discovered_offset, k, "discovered", reference_signature, false);
4287
4288 void java_lang_ref_Reference::compute_offsets() {
4289 if (_offsets_initialized) {
4290 return;
4291 }
4292 _offsets_initialized = true;
4293 InstanceKlass* k = vmClasses::Reference_klass();
4294 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4295 }
4296
4297 #if INCLUDE_CDS
4298 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
4299 f->do_bool(&_offsets_initialized);
4300 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4301 }
4302 #endif
4303
4304 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
4305 assert(obj != nullptr, "sanity");
4306 if (offset != _referent_offset) {
4307 return false;
4308 }
4309
4310 Klass* k = obj->klass();
4311 if (!k->is_instance_klass()) {
4312 return false;
4313 }
4314
4315 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
4316 bool is_reference = ik->reference_type() != REF_NONE;
4317 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
4318 return is_reference;
4319 }
4320
4321 int java_lang_boxing_object::_value_offset;
4322 int java_lang_boxing_object::_long_value_offset;
4323
4324 #define BOXING_FIELDS_DO(macro) \
4325 macro(_value_offset, integerKlass, "value", int_signature, false); \
4326 macro(_long_value_offset, longKlass, "value", long_signature, false);
4327
4328 void java_lang_boxing_object::compute_offsets() {
4329 InstanceKlass* integerKlass = vmClasses::Integer_klass();
4330 InstanceKlass* longKlass = vmClasses::Long_klass();
4331 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4332 }
4333
4334 #if INCLUDE_CDS
4335 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
4336 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4337 }
4338 #endif
4339
4340 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4341 Klass* k = vmClasses::box_klass(type);
4342 if (k == nullptr) return nullptr;
4343 InstanceKlass* ik = InstanceKlass::cast(k);
4344 if (!ik->is_initialized()) {
4345 ik->initialize(CHECK_NULL);
4346 }
4347 return ik->allocate_instance(THREAD);
4348 }
4349
4350
4351 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4352 oop box = initialize_and_allocate(type, CHECK_NULL);
4353 if (box == nullptr) return nullptr;
4354 switch (type) {
4355 case T_BOOLEAN:
4356 box->bool_field_put(_value_offset, value->z);
4357 break;
4358 case T_CHAR:
4359 box->char_field_put(_value_offset, value->c);
4360 break;
4361 case T_FLOAT:
4362 box->float_field_put(_value_offset, value->f);
4363 break;
4364 case T_DOUBLE:
4365 box->double_field_put(_long_value_offset, value->d);
4366 break;
4367 case T_BYTE:
4368 box->byte_field_put(_value_offset, value->b);
4369 break;
4370 case T_SHORT:
4371 box->short_field_put(_value_offset, value->s);
4372 break;
4373 case T_INT:
4374 box->int_field_put(_value_offset, value->i);
4375 break;
4376 case T_LONG:
4377 box->long_field_put(_long_value_offset, value->j);
4378 break;
4379 default:
4380 return nullptr;
4381 }
4382 return box;
4383 }
4384
4385
4386 BasicType java_lang_boxing_object::basic_type(oop box) {
4387 if (box == nullptr) return T_ILLEGAL;
4388 BasicType type = vmClasses::box_klass_type(box->klass());
4389 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4390 return T_ILLEGAL;
4391 return type;
4392 }
4393
4394
4395 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4396 BasicType type = vmClasses::box_klass_type(box->klass());
4397 switch (type) {
4398 case T_BOOLEAN:
4399 value->z = box->bool_field(_value_offset);
4400 break;
4401 case T_CHAR:
4402 value->c = box->char_field(_value_offset);
4403 break;
4404 case T_FLOAT:
4405 value->f = box->float_field(_value_offset);
4406 break;
4407 case T_DOUBLE:
4408 value->d = box->double_field(_long_value_offset);
4409 break;
4410 case T_BYTE:
4411 value->b = box->byte_field(_value_offset);
4412 break;
4413 case T_SHORT:
4414 value->s = box->short_field(_value_offset);
4415 break;
4416 case T_INT:
4417 value->i = box->int_field(_value_offset);
4418 break;
4419 case T_LONG:
4420 value->j = box->long_field(_long_value_offset);
4421 break;
4422 default:
4423 return T_ILLEGAL;
4424 } // end switch
4425 return type;
4426 }
4427
4428
4429 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4430 BasicType type = vmClasses::box_klass_type(box->klass());
4431 switch (type) {
4432 case T_BOOLEAN:
4433 box->bool_field_put(_value_offset, value->z);
4434 break;
4435 case T_CHAR:
4436 box->char_field_put(_value_offset, value->c);
4437 break;
4438 case T_FLOAT:
4439 box->float_field_put(_value_offset, value->f);
4440 break;
4441 case T_DOUBLE:
4442 box->double_field_put(_long_value_offset, value->d);
4443 break;
4444 case T_BYTE:
4445 box->byte_field_put(_value_offset, value->b);
4446 break;
4447 case T_SHORT:
4448 box->short_field_put(_value_offset, value->s);
4449 break;
4450 case T_INT:
4451 box->int_field_put(_value_offset, value->i);
4452 break;
4453 case T_LONG:
4454 box->long_field_put(_long_value_offset, value->j);
4455 break;
4456 default:
4457 return T_ILLEGAL;
4458 } // end switch
4459 return type;
4460 }
4461
4462
4463 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4464 switch (type) {
4465 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4466 case T_CHAR: st->print("%d", value->c); break;
4467 case T_BYTE: st->print("%d", value->b); break;
4468 case T_SHORT: st->print("%d", value->s); break;
4469 case T_INT: st->print("%d", value->i); break;
4470 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4471 case T_FLOAT: st->print("%f", value->f); break;
4472 case T_DOUBLE: st->print("%lf", value->d); break;
4473 default: st->print("type %d?", type); break;
4474 }
4475 }
4476
4477
4478 // Support for java_lang_ref_SoftReference
4479 //
4480
4481 int java_lang_ref_SoftReference::_timestamp_offset;
4482 int java_lang_ref_SoftReference::_static_clock_offset;
4483
4484 #define SOFTREFERENCE_FIELDS_DO(macro) \
4485 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4486 macro(_static_clock_offset, k, "clock", long_signature, true)
4487
4488 void java_lang_ref_SoftReference::compute_offsets() {
4489 InstanceKlass* k = vmClasses::SoftReference_klass();
4490 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4491 }
4492
4493 #if INCLUDE_CDS
4494 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4495 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4496 }
4497 #endif
4498
4499 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4500 return ref->long_field(_timestamp_offset);
4501 }
4502
4503 jlong java_lang_ref_SoftReference::clock() {
4504 InstanceKlass* ik = vmClasses::SoftReference_klass();
4505 oop base = ik->static_field_base_raw();
4506 return base->long_field(_static_clock_offset);
4507 }
4508
4509 void java_lang_ref_SoftReference::set_clock(jlong value) {
4510 InstanceKlass* ik = vmClasses::SoftReference_klass();
4511 oop base = ik->static_field_base_raw();
4512 base->long_field_put(_static_clock_offset, value);
4513 }
4514
4515 // Support for java_lang_invoke_DirectMethodHandle
4516
4517 int java_lang_invoke_DirectMethodHandle::_member_offset;
4518
4519 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4520 oop member_name = nullptr;
4521 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4522 "a DirectMethodHandle oop is expected");
4523 return dmh->obj_field(_member_offset);
4524 }
4525
4526 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4527 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4528
4529 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4530 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4531 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4532 }
4533
4534 #if INCLUDE_CDS
4535 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4536 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4537 }
4538 #endif
4539
4540 // Support for java_lang_invoke_MethodHandle
4541
4542 int java_lang_invoke_MethodHandle::_type_offset;
4543 int java_lang_invoke_MethodHandle::_form_offset;
4544
4545 int java_lang_invoke_MemberName::_clazz_offset;
4546 int java_lang_invoke_MemberName::_name_offset;
4547 int java_lang_invoke_MemberName::_type_offset;
4548 int java_lang_invoke_MemberName::_flags_offset;
4549 int java_lang_invoke_MemberName::_method_offset;
4550 int java_lang_invoke_MemberName::_vmindex_offset;
4551
4552 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4553 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4554
4555 int java_lang_invoke_LambdaForm::_vmentry_offset;
4556
4557 #define METHODHANDLE_FIELDS_DO(macro) \
4558 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4559 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4560
4561 void java_lang_invoke_MethodHandle::compute_offsets() {
4562 InstanceKlass* k = vmClasses::MethodHandle_klass();
4563 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4564 }
4565
4566 #if INCLUDE_CDS
4567 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4568 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4569 }
4570 #endif
4571
4572 #define MEMBERNAME_FIELDS_DO(macro) \
4573 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4574 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4575 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4576 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4577 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4578
4579 void java_lang_invoke_MemberName::compute_offsets() {
4580 InstanceKlass* k = vmClasses::MemberName_klass();
4581 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4582 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4583 }
4584
4585 #if INCLUDE_CDS
4586 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4587 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4588 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4589 }
4590 #endif
4591
4592 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4593 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4594
4595 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4596 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4597 assert(k != nullptr, "jdk mismatch");
4598 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4599 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4600 }
4601
4602 #if INCLUDE_CDS
4603 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4604 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4605 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4606 }
4607 #endif
4608
4609 #define LAMBDAFORM_FIELDS_DO(macro) \
4610 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4611
4612 void java_lang_invoke_LambdaForm::compute_offsets() {
4613 InstanceKlass* k = vmClasses::LambdaForm_klass();
4614 assert (k != nullptr, "jdk mismatch");
4615 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4616 }
4617
4618 #if INCLUDE_CDS
4619 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4620 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4621 }
4622 #endif
4623
4624 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4625 return obj != nullptr && is_subclass(obj->klass());
4626 }
4627
4628 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4629 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4630
4631 #define NEP_FIELDS_DO(macro) \
4632 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4633 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4634
4635 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4636 return obj != nullptr && is_subclass(obj->klass());
4637 }
4638
4639 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4640 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4641 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4642 }
4643
4644 #if INCLUDE_CDS
4645 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4646 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4647 }
4648 #endif
4649
4650 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4651 return entry->obj_field(_method_type_offset);
4652 }
4653
4654 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4655 return entry->long_field(_downcall_stub_address_offset);
4656 }
4657
4658 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4659 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4660 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4661 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4662 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4663 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4664 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4665
4666 #define ABIDescriptor_FIELDS_DO(macro) \
4667 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4668 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4669 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4670 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4671 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4672 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4673 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4674
4675 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4676 return obj != nullptr && is_subclass(obj->klass());
4677 }
4678
4679 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4680 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4681 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4682 }
4683
4684 #if INCLUDE_CDS
4685 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4686 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4687 }
4688 #endif
4689
4690 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4691 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4692 }
4693
4694 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4695 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4696 }
4697
4698 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4699 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4700 }
4701
4702 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4703 return entry->int_field(_stackAlignment_offset);
4704 }
4705
4706 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4707 return entry->int_field(_shadowSpace_offset);
4708 }
4709
4710 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4711 return entry->obj_field(_scratch1_offset);
4712 }
4713
4714 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4715 return entry->obj_field(_scratch2_offset);
4716 }
4717
4718 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4719 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4720 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4721 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4722
4723 #define VMStorage_FIELDS_DO(macro) \
4724 macro(_type_offset, k, "type", byte_signature, false); \
4725 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4726 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4727 macro(_debugName_offset, k, "debugName", string_signature, false); \
4728
4729 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4730 return obj != nullptr && is_subclass(obj->klass());
4731 }
4732
4733 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4734 InstanceKlass* k = vmClasses::VMStorage_klass();
4735 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4736 }
4737
4738 #if INCLUDE_CDS
4739 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4740 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4741 }
4742 #endif
4743
4744 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4745 return entry->byte_field(_type_offset);
4746 }
4747
4748 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4749 return entry->int_field(_indexOrOffset_offset);
4750 }
4751
4752 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4753 return entry->short_field(_segmentMaskOrSize_offset);
4754 }
4755
4756 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4757 return entry->obj_field(_debugName_offset);
4758 }
4759
4760 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4761 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4762
4763 #define CallConv_FIELDS_DO(macro) \
4764 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4765 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4766
4767 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4768 return obj != nullptr && is_subclass(obj->klass());
4769 }
4770
4771 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4772 InstanceKlass* k = vmClasses::CallConv_klass();
4773 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4774 }
4775
4776 #if INCLUDE_CDS
4777 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4778 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4779 }
4780 #endif
4781
4782 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4783 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4784 }
4785
4786 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4787 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4788 }
4789
4790 oop java_lang_invoke_MethodHandle::type(oop mh) {
4791 return mh->obj_field(_type_offset);
4792 }
4793
4794 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4795 mh->obj_field_put(_type_offset, mtype);
4796 }
4797
4798 oop java_lang_invoke_MethodHandle::form(oop mh) {
4799 assert(_form_offset != 0, "");
4800 return mh->obj_field(_form_offset);
4801 }
4802
4803 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4804 assert(_form_offset != 0, "");
4805 mh->obj_field_put(_form_offset, lform);
4806 }
4807
4808 /// MemberName accessors
4809
4810 oop java_lang_invoke_MemberName::clazz(oop mname) {
4811 assert(is_instance(mname), "wrong type");
4812 return mname->obj_field(_clazz_offset);
4813 }
4814
4815 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4816 assert(is_instance(mname), "wrong type");
4817 mname->obj_field_put(_clazz_offset, clazz);
4818 }
4819
4820 oop java_lang_invoke_MemberName::name(oop mname) {
4821 assert(is_instance(mname), "wrong type");
4822 return mname->obj_field(_name_offset);
4823 }
4824
4825 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4826 assert(is_instance(mname), "wrong type");
4827 mname->obj_field_put(_name_offset, name);
4828 }
4829
4830 oop java_lang_invoke_MemberName::type(oop mname) {
4831 assert(is_instance(mname), "wrong type");
4832 return mname->obj_field(_type_offset);
4833 }
4834
4835 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4836 assert(is_instance(mname), "wrong type");
4837 mname->obj_field_put(_type_offset, type);
4838 }
4839
4840 int java_lang_invoke_MemberName::flags(oop mname) {
4841 assert(is_instance(mname), "wrong type");
4842 return mname->int_field(_flags_offset);
4843 }
4844
4845 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4846 assert(is_instance(mname), "wrong type");
4847 mname->int_field_put(_flags_offset, flags);
4848 }
4849
4850
4851 // Return vmtarget from ResolvedMethodName method field through indirection
4852 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4853 assert(is_instance(mname), "wrong type");
4854 oop method = mname->obj_field(_method_offset);
4855 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4856 }
4857
4858 bool java_lang_invoke_MemberName::is_method(oop mname) {
4859 assert(is_instance(mname), "must be MemberName");
4860 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4861 }
4862
4863 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4864 assert(is_instance(mname), "wrong type");
4865 mname->obj_field_put(_method_offset, resolved_method);
4866 }
4867
4868 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4869 assert(is_instance(mname), "wrong type");
4870 return (intptr_t) mname->address_field(_vmindex_offset);
4871 }
4872
4873 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4874 assert(is_instance(mname), "wrong type");
4875 mname->address_field_put(_vmindex_offset, (address) index);
4876 }
4877
4878
4879 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4880 assert(is_instance(resolved_method), "wrong type");
4881 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4882 assert(m->is_method(), "must be");
4883 return m;
4884 }
4885
4886 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4887 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4888 assert(is_instance(resolved_method), "wrong type");
4889 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4890 }
4891
4892 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4893 assert(is_instance(resolved_method), "wrong type");
4894 resolved_method->obj_field_put(_vmholder_offset, holder);
4895 }
4896
4897 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4898 const Method* method = m();
4899
4900 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4901 oop resolved_method = ResolvedMethodTable::find_method(method);
4902 if (resolved_method != nullptr) {
4903 return resolved_method;
4904 }
4905
4906 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4907 if (!k->is_initialized()) {
4908 k->initialize(CHECK_NULL);
4909 }
4910
4911 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4912
4913 NoSafepointVerifier nsv;
4914
4915 if (method->is_old()) {
4916 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4917 method->get_new_method();
4918 }
4919
4920 InstanceKlass* holder = method->method_holder();
4921
4922 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4923 // Add a reference to the loader (actually mirror because hidden classes may not have
4924 // distinct loaders) to ensure the metadata is kept alive.
4925 // This mirror may be different than the one in clazz field.
4926 set_vmholder(new_resolved_method, holder->java_mirror());
4927
4928 // Set flag in class to indicate this InstanceKlass has entries in the table
4929 // to avoid walking table during redefinition if none of the redefined classes
4930 // have any membernames in the table.
4931 holder->set_has_resolved_methods();
4932
4933 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4934 }
4935
4936 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4937 assert(is_instance(lform), "wrong type");
4938 return lform->obj_field(_vmentry_offset);
4939 }
4940
4941
4942 // Support for java_lang_invoke_MethodType
4943
4944 int java_lang_invoke_MethodType::_rtype_offset;
4945 int java_lang_invoke_MethodType::_ptypes_offset;
4946
4947 #define METHODTYPE_FIELDS_DO(macro) \
4948 macro(_rtype_offset, k, "rtype", class_signature, false); \
4949 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4950
4951 void java_lang_invoke_MethodType::compute_offsets() {
4952 InstanceKlass* k = vmClasses::MethodType_klass();
4953 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4954 }
4955
4956 #if INCLUDE_CDS
4957 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4958 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4959 }
4960 #endif
4961
4962 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4963 st->print("(");
4964 objArrayOop pts = ptypes(mt);
4965 if (pts != nullptr) {
4966 for (int i = 0, limit = pts->length(); i < limit; i++) {
4967 java_lang_Class::print_signature(pts->obj_at(i), st);
4968 }
4969 } else {
4970 st->print("null");
4971 }
4972 st->print(")");
4973 oop rt = rtype(mt);
4974 if (rt != nullptr) {
4975 java_lang_Class::print_signature(rt, st);
4976 } else {
4977 st->print("null");
4978 }
4979 }
4980
4981 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4982 ResourceMark rm;
4983 stringStream buffer(128);
4984 print_signature(mt, &buffer);
4985 const char* sigstr = buffer.base();
4986 int siglen = (int) buffer.size();
4987 Symbol *name;
4988 if (!intern_if_not_found) {
4989 name = SymbolTable::probe(sigstr, siglen);
4990 } else {
4991 name = SymbolTable::new_symbol(sigstr, siglen);
4992 }
4993 return name;
4994 }
4995
4996 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4997 if (mt1 == mt2)
4998 return true;
4999 if (rtype(mt1) != rtype(mt2))
5000 return false;
5001 if (ptype_count(mt1) != ptype_count(mt2))
5002 return false;
5003 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
5004 if (ptype(mt1, i) != ptype(mt2, i))
5005 return false;
5006 }
5007 return true;
5008 }
5009
5010 oop java_lang_invoke_MethodType::rtype(oop mt) {
5011 assert(is_instance(mt), "must be a MethodType");
5012 return mt->obj_field(_rtype_offset);
5013 }
5014
5015 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
5016 assert(is_instance(mt), "must be a MethodType");
5017 return (objArrayOop) mt->obj_field(_ptypes_offset);
5018 }
5019
5020 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
5021 return ptypes(mt)->obj_at(idx);
5022 }
5023
5024 int java_lang_invoke_MethodType::ptype_count(oop mt) {
5025 return ptypes(mt)->length();
5026 }
5027
5028 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
5029 objArrayOop pts = ptypes(mt);
5030 int count = pts->length();
5031 int slots = 0;
5032 for (int i = 0; i < count; i++) {
5033 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
5034 slots += type2size[bt];
5035 }
5036 return slots;
5037 }
5038
5039 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
5040 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
5041 return type2size[bt];
5042 }
5043
5044
5045 // Support for java_lang_invoke_CallSite
5046
5047 int java_lang_invoke_CallSite::_target_offset;
5048 int java_lang_invoke_CallSite::_vmdependencies_offset;
5049 int java_lang_invoke_CallSite::_last_cleanup_offset;
5050
5051 #define CALLSITE_FIELDS_DO(macro) \
5052 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
5053
5054 void java_lang_invoke_CallSite::compute_offsets() {
5055 InstanceKlass* k = vmClasses::CallSite_klass();
5056 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5057 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5058 }
5059
5060 #if INCLUDE_CDS
5061 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
5062 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5063 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5064 }
5065 #endif
5066
5067 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
5068 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
5069 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
5070 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
5071 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
5072 return dep_ctx;
5073 }
5074
5075 // Support for java_lang_invoke_ConstantCallSite
5076
5077 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
5078
5079 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
5080 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
5081
5082 void java_lang_invoke_ConstantCallSite::compute_offsets() {
5083 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
5084 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5085 }
5086
5087 #if INCLUDE_CDS
5088 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
5089 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5090 }
5091 #endif
5092
5093 // Support for java_lang_ClassLoader
5094
5095 int java_lang_ClassLoader::_loader_data_offset;
5096 int java_lang_ClassLoader::_parallelCapable_offset;
5097 int java_lang_ClassLoader::_name_offset;
5098 int java_lang_ClassLoader::_nameAndId_offset;
5099 int java_lang_ClassLoader::_unnamedModule_offset;
5100 int java_lang_ClassLoader::_parent_offset;
5101
5102 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
5103 assert(loader != nullptr, "loader must not be null");
5104 assert(oopDesc::is_oop(loader), "loader must be oop");
5105 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
5106 }
5107
5108 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
5109 assert(loader != nullptr, "loader must not be null");
5110 assert(oopDesc::is_oop(loader), "loader must be oop");
5111 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
5112 }
5113
5114 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
5115 assert(loader != nullptr, "loader must not be null");
5116 assert(oopDesc::is_oop(loader), "loader must be oop");
5117 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
5118 }
5119
5120 #define CLASSLOADER_FIELDS_DO(macro) \
5121 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
5122 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
5123 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
5124 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
5125 macro(_parent_offset, k1, "parent", classloader_signature, false)
5126
5127 void java_lang_ClassLoader::compute_offsets() {
5128 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
5129 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5130
5131 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5132 }
5133
5134 #if INCLUDE_CDS
5135 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
5136 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5137 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5138 }
5139 #endif
5140
5141 oop java_lang_ClassLoader::parent(oop loader) {
5142 assert(is_instance(loader), "loader must be oop");
5143 return loader->obj_field(_parent_offset);
5144 }
5145
5146 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
5147 assert(is_instance(loader), "loader must be oop");
5148 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
5149 }
5150
5151 // Returns the name field of this class loader. If the name field has not
5152 // been set, null will be returned.
5153 oop java_lang_ClassLoader::name(oop loader) {
5154 assert(is_instance(loader), "loader must be oop");
5155 return loader->obj_field(_name_offset);
5156 }
5157
5158 // Returns the nameAndId field of this class loader. The format is
5159 // as follows:
5160 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
5161 // If the defining loader has no name then <qualified-class-name> @<id>
5162 // If built-in loader, then omit '@<id>' as there is only one instance.
5163 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
5164 oop java_lang_ClassLoader::nameAndId(oop loader) {
5165 assert(is_instance(loader), "loader must be oop");
5166 return loader->obj_field(_nameAndId_offset);
5167 }
5168
5169 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
5170 assert(is_instance(loader), "loader must be oop");
5171 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
5172 oop acl = loader;
5173 debug_only(jint loop_count = 0);
5174 // This loop taken verbatim from ClassLoader.java:
5175 do {
5176 acl = parent(acl);
5177 if (cl == acl) {
5178 return true;
5179 }
5180 assert(++loop_count > 0, "loop_count overflow");
5181 } while (acl != nullptr);
5182 return false;
5183 }
5184
5185 bool java_lang_ClassLoader::is_instance(oop obj) {
5186 return obj != nullptr && is_subclass(obj->klass());
5187 }
5188
5189
5190 // For class loader classes, parallelCapable defined
5191 // based on non-null field
5192 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
5193 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
5194 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
5195 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
5196 }
5197
5198 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
5199 oop cl = SystemDictionary::java_system_loader();
5200 while(cl != nullptr) {
5201 if (cl == loader) return true;
5202 cl = parent(cl);
5203 }
5204 return false;
5205 }
5206
5207 oop java_lang_ClassLoader::unnamedModule(oop loader) {
5208 assert(is_instance(loader), "loader must be oop");
5209 return loader->obj_field(_unnamedModule_offset);
5210 }
5211
5212 // Support for java_lang_System
5213 //
5214
5215 int java_lang_System::_static_in_offset;
5216 int java_lang_System::_static_out_offset;
5217 int java_lang_System::_static_err_offset;
5218
5219 #define SYSTEM_FIELDS_DO(macro) \
5220 macro(_static_in_offset, k, "in", input_stream_signature, true); \
5221 macro(_static_out_offset, k, "out", print_stream_signature, true); \
5222 macro(_static_err_offset, k, "err", print_stream_signature, true);
5223
5224 void java_lang_System::compute_offsets() {
5225 InstanceKlass* k = vmClasses::System_klass();
5226 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5227 }
5228
5229 #if INCLUDE_CDS
5230 void java_lang_System::serialize_offsets(SerializeClosure* f) {
5231 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5232 }
5233 #endif
5234
5235 // Support for jdk_internal_misc_UnsafeConstants
5236 //
5237 class UnsafeConstantsFixup : public FieldClosure {
5238 private:
5239 int _address_size;
5240 int _page_size;
5241 bool _big_endian;
5242 bool _use_unaligned_access;
5243 int _data_cache_line_flush_size;
5244 public:
5245 UnsafeConstantsFixup() {
5246 // round up values for all static final fields
5247 _address_size = sizeof(void*);
5248 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
5249 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
5250 _use_unaligned_access = UseUnalignedAccesses;
5251 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
5252 }
5253
5254 void do_field(fieldDescriptor* fd) {
5255 oop mirror = fd->field_holder()->java_mirror();
5256 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
5257 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
5258 assert(fd->is_final(), "fields of UnsafeConstants must be final");
5259 assert(fd->is_static(), "fields of UnsafeConstants must be static");
5260 if (fd->name() == vmSymbols::address_size_name()) {
5261 mirror->int_field_put(fd->offset(), _address_size);
5262 } else if (fd->name() == vmSymbols::page_size_name()) {
5263 mirror->int_field_put(fd->offset(), _page_size);
5264 } else if (fd->name() == vmSymbols::big_endian_name()) {
5265 mirror->bool_field_put(fd->offset(), _big_endian);
5266 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
5267 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
5268 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
5269 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
5270 } else {
5271 assert(false, "unexpected UnsafeConstants field");
5272 }
5273 }
5274 };
5275
5276 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
5277 UnsafeConstantsFixup fixup;
5278 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
5279 }
5280
5281
5282 // java_lang_StackTraceElement
5283
5284 int java_lang_StackTraceElement::_methodName_offset;
5285 int java_lang_StackTraceElement::_fileName_offset;
5286 int java_lang_StackTraceElement::_lineNumber_offset;
5287 int java_lang_StackTraceElement::_moduleName_offset;
5288 int java_lang_StackTraceElement::_moduleVersion_offset;
5289 int java_lang_StackTraceElement::_classLoaderName_offset;
5290 int java_lang_StackTraceElement::_declaringClass_offset;
5291 int java_lang_StackTraceElement::_declaringClassObject_offset;
5292
5293 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
5294 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
5295 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
5296 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
5297 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
5298 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
5299 macro(_methodName_offset, k, "methodName", string_signature, false); \
5300 macro(_fileName_offset, k, "fileName", string_signature, false); \
5301 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
5302
5303 // Support for java_lang_StackTraceElement
5304 void java_lang_StackTraceElement::compute_offsets() {
5305 InstanceKlass* k = vmClasses::StackTraceElement_klass();
5306 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5307 }
5308
5309 #if INCLUDE_CDS
5310 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
5311 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5312 }
5313 #endif
5314
5315 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
5316 element->obj_field_put(_fileName_offset, value);
5317 }
5318
5319 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
5320 element->obj_field_put(_declaringClass_offset, value);
5321 }
5322
5323 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5324 element->obj_field_put(_methodName_offset, value);
5325 }
5326
5327 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5328 element->int_field_put(_lineNumber_offset, value);
5329 }
5330
5331 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5332 element->obj_field_put(_moduleName_offset, value);
5333 }
5334
5335 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5336 element->obj_field_put(_moduleVersion_offset, value);
5337 }
5338
5339 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5340 element->obj_field_put(_classLoaderName_offset, value);
5341 }
5342
5343 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5344 element->obj_field_put(_declaringClassObject_offset, value);
5345 }
5346
5347
5348 // java_lang_AssertionStatusDirectives
5349
5350 int java_lang_AssertionStatusDirectives::_classes_offset;
5351 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5352 int java_lang_AssertionStatusDirectives::_packages_offset;
5353 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5354 int java_lang_AssertionStatusDirectives::_deflt_offset;
5355
5356 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5357 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5358 macro(_classes_offset, k, "classes", string_array_signature, false); \
5359 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5360 macro(_packages_offset, k, "packages", string_array_signature, false); \
5361 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5362 macro(_deflt_offset, k, "deflt", bool_signature, false)
5363
5364 void java_lang_AssertionStatusDirectives::compute_offsets() {
5365 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5366 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5367 }
5368
5369 #if INCLUDE_CDS
5370 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5371 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5372 }
5373 #endif
5374
5375 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5376 o->obj_field_put(_classes_offset, val);
5377 }
5378
5379 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5380 o->obj_field_put(_classEnabled_offset, val);
5381 }
5382
5383 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5384 o->obj_field_put(_packages_offset, val);
5385 }
5386
5387 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5388 o->obj_field_put(_packageEnabled_offset, val);
5389 }
5390
5391 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5392 o->bool_field_put(_deflt_offset, val);
5393 }
5394
5395 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5396
5397 #define AOS_FIELDS_DO(macro) \
5398 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5399
5400 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5401 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5402 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5403 }
5404
5405 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5406 assert(_owner_offset != 0, "Must be initialized");
5407 return obj->obj_field(_owner_offset);
5408 }
5409
5410 #if INCLUDE_CDS
5411 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5412 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5413 }
5414 #endif
5415
5416 int vector_VectorPayload::_payload_offset;
5417
5418 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5419 macro(_payload_offset, k, "payload", object_signature, false)
5420
5421 void vector_VectorPayload::compute_offsets() {
5422 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5423 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5424 }
5425
5426 #if INCLUDE_CDS
5427 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5428 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5429 }
5430 #endif
5431
5432 void vector_VectorPayload::set_payload(oop o, oop val) {
5433 o->obj_field_put(_payload_offset, val);
5434 }
5435
5436 bool vector_VectorPayload::is_instance(oop obj) {
5437 return obj != nullptr && is_subclass(obj->klass());
5438 }
5439
5440 int java_lang_Integer_IntegerCache::_static_cache_offset;
5441 int java_lang_Long_LongCache::_static_cache_offset;
5442 int java_lang_Character_CharacterCache::_static_cache_offset;
5443 int java_lang_Short_ShortCache::_static_cache_offset;
5444 int java_lang_Byte_ByteCache::_static_cache_offset;
5445
5446 #define INTEGER_CACHE_FIELDS_DO(macro) \
5447 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5448
5449 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5450 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5451 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5452 }
5453
5454 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5455 oop base = ik->static_field_base_raw();
5456 return objArrayOop(base->obj_field(_static_cache_offset));
5457 }
5458
5459 Symbol* java_lang_Integer_IntegerCache::symbol() {
5460 return vmSymbols::java_lang_Integer_IntegerCache();
5461 }
5462
5463 #if INCLUDE_CDS
5464 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5465 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5466 }
5467 #endif
5468 #undef INTEGER_CACHE_FIELDS_DO
5469
5470 jint java_lang_Integer::value(oop obj) {
5471 jvalue v;
5472 java_lang_boxing_object::get_value(obj, &v);
5473 return v.i;
5474 }
5475
5476 #define LONG_CACHE_FIELDS_DO(macro) \
5477 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5478
5479 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5480 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5481 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5482 }
5483
5484 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5485 oop base = ik->static_field_base_raw();
5486 return objArrayOop(base->obj_field(_static_cache_offset));
5487 }
5488
5489 Symbol* java_lang_Long_LongCache::symbol() {
5490 return vmSymbols::java_lang_Long_LongCache();
5491 }
5492
5493 #if INCLUDE_CDS
5494 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5495 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5496 }
5497 #endif
5498 #undef LONG_CACHE_FIELDS_DO
5499
5500 jlong java_lang_Long::value(oop obj) {
5501 jvalue v;
5502 java_lang_boxing_object::get_value(obj, &v);
5503 return v.j;
5504 }
5505
5506 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5507 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5508
5509 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5510 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5511 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5512 }
5513
5514 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5515 oop base = ik->static_field_base_raw();
5516 return objArrayOop(base->obj_field(_static_cache_offset));
5517 }
5518
5519 Symbol* java_lang_Character_CharacterCache::symbol() {
5520 return vmSymbols::java_lang_Character_CharacterCache();
5521 }
5522
5523 #if INCLUDE_CDS
5524 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5525 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5526 }
5527 #endif
5528 #undef CHARACTER_CACHE_FIELDS_DO
5529
5530 jchar java_lang_Character::value(oop obj) {
5531 jvalue v;
5532 java_lang_boxing_object::get_value(obj, &v);
5533 return v.c;
5534 }
5535
5536 #define SHORT_CACHE_FIELDS_DO(macro) \
5537 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5538
5539 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5540 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5541 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5542 }
5543
5544 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5545 oop base = ik->static_field_base_raw();
5546 return objArrayOop(base->obj_field(_static_cache_offset));
5547 }
5548
5549 Symbol* java_lang_Short_ShortCache::symbol() {
5550 return vmSymbols::java_lang_Short_ShortCache();
5551 }
5552
5553 #if INCLUDE_CDS
5554 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5555 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5556 }
5557 #endif
5558 #undef SHORT_CACHE_FIELDS_DO
5559
5560 jshort java_lang_Short::value(oop obj) {
5561 jvalue v;
5562 java_lang_boxing_object::get_value(obj, &v);
5563 return v.s;
5564 }
5565
5566 #define BYTE_CACHE_FIELDS_DO(macro) \
5567 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5568
5569 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5570 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5571 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5572 }
5573
5574 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5575 oop base = ik->static_field_base_raw();
5576 return objArrayOop(base->obj_field(_static_cache_offset));
5577 }
5578
5579 Symbol* java_lang_Byte_ByteCache::symbol() {
5580 return vmSymbols::java_lang_Byte_ByteCache();
5581 }
5582
5583 #if INCLUDE_CDS
5584 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5585 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5586 }
5587 #endif
5588 #undef BYTE_CACHE_FIELDS_DO
5589
5590 jbyte java_lang_Byte::value(oop obj) {
5591 jvalue v;
5592 java_lang_boxing_object::get_value(obj, &v);
5593 return v.b;
5594 }
5595
5596 int java_lang_Boolean::_static_TRUE_offset;
5597 int java_lang_Boolean::_static_FALSE_offset;
5598
5599 #define BOOLEAN_FIELDS_DO(macro) \
5600 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5601 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5602
5603
5604 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5605 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5606 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5607 }
5608
5609 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5610 oop base = ik->static_field_base_raw();
5611 return base->obj_field(_static_TRUE_offset);
5612 }
5613
5614 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5615 oop base = ik->static_field_base_raw();
5616 return base->obj_field(_static_FALSE_offset);
5617 }
5618
5619 Symbol* java_lang_Boolean::symbol() {
5620 return vmSymbols::java_lang_Boolean();
5621 }
5622
5623 #if INCLUDE_CDS
5624 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5625 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5626 }
5627 #endif
5628 #undef BOOLEAN_CACHE_FIELDS_DO
5629
5630 jboolean java_lang_Boolean::value(oop obj) {
5631 jvalue v;
5632 java_lang_boxing_object::get_value(obj, &v);
5633 return v.z;
5634 }
5635
5636 // java_lang_reflect_RecordComponent
5637
5638 int java_lang_reflect_RecordComponent::_clazz_offset;
5639 int java_lang_reflect_RecordComponent::_name_offset;
5640 int java_lang_reflect_RecordComponent::_type_offset;
5641 int java_lang_reflect_RecordComponent::_accessor_offset;
5642 int java_lang_reflect_RecordComponent::_signature_offset;
5643 int java_lang_reflect_RecordComponent::_annotations_offset;
5644 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5645
5646 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5647 macro(_clazz_offset, k, "clazz", class_signature, false); \
5648 macro(_name_offset, k, "name", string_signature, false); \
5649 macro(_type_offset, k, "type", class_signature, false); \
5650 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5651 macro(_signature_offset, k, "signature", string_signature, false); \
5652 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5653 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5654
5655 // Support for java_lang_reflect_RecordComponent
5656 void java_lang_reflect_RecordComponent::compute_offsets() {
5657 InstanceKlass* k = vmClasses::RecordComponent_klass();
5658 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5659 }
5660
5661 #if INCLUDE_CDS
5662 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5663 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5664 }
5665 #endif
5666
5667 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5668 element->obj_field_put(_clazz_offset, value);
5669 }
5670
5671 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5672 element->obj_field_put(_name_offset, value);
5673 }
5674
5675 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5676 element->obj_field_put(_type_offset, value);
5677 }
5678
5679 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5680 element->obj_field_put(_accessor_offset, value);
5681 }
5682
5683 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5684 element->obj_field_put(_signature_offset, value);
5685 }
5686
5687 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5688 element->obj_field_put(_annotations_offset, value);
5689 }
5690
5691 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5692 element->obj_field_put(_typeAnnotations_offset, value);
5693 }
5694
5695 // java_lang_InternalError
5696 int java_lang_InternalError::_during_unsafe_access_offset;
5697
5698 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5699 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5700 }
5701
5702 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5703 return internal_error->bool_field(_during_unsafe_access_offset);
5704 }
5705
5706 void java_lang_InternalError::compute_offsets() {
5707 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5708 }
5709
5710 #if INCLUDE_CDS
5711 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5712 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5713 }
5714 #endif
5715
5716 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5717 f(java_lang_Class) \
5718 f(java_lang_String) \
5719 f(java_lang_ref_Reference) \
5720 //end
5721
5722 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5723 f(java_lang_System) \
5724 f(java_lang_ClassLoader) \
5725 f(java_lang_Throwable) \
5726 f(java_lang_Thread) \
5727 f(java_lang_Thread_FieldHolder) \
5728 f(java_lang_Thread_Constants) \
5729 f(java_lang_ThreadGroup) \
5730 f(java_lang_VirtualThread) \
5731 f(java_lang_InternalError) \
5732 f(java_lang_AssertionStatusDirectives) \
5733 f(java_lang_ref_SoftReference) \
5734 f(java_lang_invoke_MethodHandle) \
5735 f(java_lang_invoke_DirectMethodHandle) \
5736 f(java_lang_invoke_MemberName) \
5737 f(java_lang_invoke_ResolvedMethodName) \
5738 f(java_lang_invoke_LambdaForm) \
5739 f(java_lang_invoke_MethodType) \
5740 f(java_lang_invoke_CallSite) \
5741 f(java_lang_invoke_ConstantCallSite) \
5742 f(java_lang_reflect_AccessibleObject) \
5743 f(java_lang_reflect_Method) \
5744 f(java_lang_reflect_Constructor) \
5745 f(java_lang_reflect_Field) \
5746 f(java_lang_reflect_RecordComponent) \
5747 f(reflect_ConstantPool) \
5748 f(java_lang_reflect_Parameter) \
5749 f(java_lang_Module) \
5750 f(java_lang_StackTraceElement) \
5751 f(java_lang_ClassFrameInfo) \
5752 f(java_lang_StackFrameInfo) \
5753 f(java_lang_LiveStackFrameInfo) \
5754 f(jdk_internal_vm_ContinuationScope) \
5755 f(jdk_internal_vm_Continuation) \
5756 f(jdk_internal_vm_StackChunk) \
5757 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5758 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5759 f(jdk_internal_foreign_abi_ABIDescriptor) \
5760 f(jdk_internal_foreign_abi_VMStorage) \
5761 f(jdk_internal_foreign_abi_CallConv) \
5762 f(jdk_internal_misc_UnsafeConstants) \
5763 f(java_lang_boxing_object) \
5764 f(vector_VectorPayload) \
5765 //end
5766
5767 #define BASIC_JAVA_CLASSES_DO(f) \
5768 BASIC_JAVA_CLASSES_DO_PART1(f) \
5769 BASIC_JAVA_CLASSES_DO_PART2(f)
5770
5771 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5772
5773 // Compute field offsets of all the classes in this file
5774 void JavaClasses::compute_offsets() {
5775 if (CDSConfig::is_using_archive()) {
5776 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5777 JvmtiExport::has_early_class_hook_env()),
5778 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5779 // None of the classes used by the rest of this function can be replaced by
5780 // JVMTI ClassFileLoadHook.
5781 // We are safe to use the archived offsets, which have already been restored
5782 // by JavaClasses::serialize_offsets, without computing the offsets again.
5783 return;
5784 }
5785
5786 // We have already called the compute_offsets() of the
5787 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5788 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5789 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5790 }
5791
5792 #if INCLUDE_CDS
5793 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5794
5795 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5796 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5797 }
5798 #endif
5799
5800 #if INCLUDE_CDS_JAVA_HEAP
5801 bool JavaClasses::is_supported_for_archiving(oop obj) {
5802 Klass* klass = obj->klass();
5803
5804 if (!CDSConfig::is_dumping_method_handles()) {
5805 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5806 if (klass == vmClasses::ResolvedMethodName_klass() ||
5807 klass == vmClasses::MemberName_klass()) {
5808 return false;
5809 }
5810 }
5811
5812 if (klass->is_subclass_of(vmClasses::Reference_klass())) {
5813 // It's problematic to archive Reference objects. One of the reasons is that
5814 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5815 return false;
5816 }
5817
5818 return true;
5819 }
5820 #endif
5821
5822 #ifndef PRODUCT
5823
5824 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5825
5826 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5827 const char* field_sig) {
5828 EXCEPTION_MARK;
5829 fieldDescriptor fd;
5830 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5831 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5832 InstanceKlass* ik = InstanceKlass::cast(k);
5833 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5834 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5835 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5836 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5837 return false;
5838 }
5839 if (fd.is_static()) {
5840 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5841 return false;
5842 }
5843 if (fd.offset() == deserialized_offset ) {
5844 return true;
5845 } else {
5846 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5847 klass_name, field_name, deserialized_offset, fd.offset());
5848 return false;
5849 }
5850 }
5851
5852 void JavaClasses::check_offsets() {
5853 bool valid = true;
5854
5855 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5856 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5857
5858 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5859 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5860
5861 // Boxed primitive objects (java_lang_boxing_object)
5862
5863 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5864 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5865 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5866 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5867 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5868 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5869 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5870 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5871
5872 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5873 }
5874
5875 #endif // PRODUCT
5876
5877 int InjectedField::compute_offset() {
5878 InstanceKlass* ik = InstanceKlass::cast(klass());
5879 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5880 if (!may_be_java && !fs.field_flags().is_injected()) {
5881 // Only look at injected fields
5882 continue;
5883 }
5884 if (fs.name() == name() && fs.signature() == signature()) {
5885 return fs.offset();
5886 }
5887 }
5888 ResourceMark rm;
5889 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)" : "");
5890 #ifndef PRODUCT
5891 ik->print();
5892 tty->print_cr("all fields:");
5893 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5894 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_field_flags());
5895 }
5896 #endif //PRODUCT
5897 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5898 return -1;
5899 }
5900
5901 void javaClasses_init() {
5902 JavaClasses::compute_offsets();
5903 JavaClasses::check_offsets();
5904 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5905 }