1 /*
2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/archiveBuilder.hpp"
27 #include "cds/archiveHeapLoader.hpp"
28 #include "cds/cdsConfig.hpp"
29 #include "cds/heapShared.hpp"
30 #include "cds/metaspaceShared.hpp"
31 #include "classfile/altHashing.hpp"
32 #include "classfile/classLoaderData.inline.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/javaClassesImpl.hpp"
35 #include "classfile/javaThreadStatus.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "code/debugInfo.hpp"
43 #include "code/dependencyContext.hpp"
44 #include "code/pcDesc.hpp"
45 #include "gc/shared/collectedHeap.inline.hpp"
46 #include "interpreter/interpreter.hpp"
47 #include "interpreter/linkResolver.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "logging/logStream.hpp"
51 #include "memory/oopFactory.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/fieldInfo.hpp"
55 #include "oops/fieldStreams.inline.hpp"
56 #include "oops/instanceKlass.inline.hpp"
57 #include "oops/instanceMirrorKlass.hpp"
58 #include "oops/klass.hpp"
59 #include "oops/klass.inline.hpp"
60 #include "oops/method.inline.hpp"
61 #include "oops/objArrayKlass.hpp"
62 #include "oops/objArrayOop.inline.hpp"
63 #include "oops/oopCast.inline.hpp"
64 #include "oops/oop.inline.hpp"
65 #include "oops/symbol.hpp"
66 #include "oops/recordComponent.hpp"
67 #include "oops/typeArrayOop.inline.hpp"
68 #include "prims/jvmtiExport.hpp"
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/threadSMR.hpp"
87 #include "runtime/vframe.inline.hpp"
88 #include "runtime/vm_version.hpp"
89 #include "utilities/align.hpp"
90 #include "utilities/globalDefinitions.hpp"
91 #include "utilities/growableArray.hpp"
92 #include "utilities/preserveException.hpp"
93 #include "utilities/utf8.hpp"
94 #if INCLUDE_JVMCI
95 #include "jvmci/jvmciJavaClasses.hpp"
96 #endif
97
98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
100
101 InjectedField JavaClasses::_injected_fields[] = {
102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
103 };
104
105 // Register native methods of Object
106 void java_lang_Object::register_natives(TRAPS) {
107 InstanceKlass* obj = vmClasses::Object_klass();
108 Method::register_native(obj, vmSymbols::hashCode_name(),
109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
110 Method::register_native(obj, vmSymbols::wait_name(),
111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
112 Method::register_native(obj, vmSymbols::notify_name(),
113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
114 Method::register_native(obj, vmSymbols::notifyAll_name(),
115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
116 Method::register_native(obj, vmSymbols::clone_name(),
117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
118 }
119
120 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
121 return _injected_fields[(int)id].compute_offset();
122 }
123
124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
125 *field_count = 0;
126
127 vmSymbolID sid = vmSymbols::find_sid(class_name);
128 if (sid == vmSymbolID::NO_SID) {
129 // Only well known classes can inject fields
130 return nullptr;
131 }
132
133 int count = 0;
134 int start = -1;
135
136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
138 count++; \
139 if (start == -1) { \
140 start = (int)InjectedFieldID::klass##_##name##_enum; \
141 } \
142 }
143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
144 #undef LOOKUP_INJECTED_FIELD
145
146 if (start != -1) {
147 *field_count = count;
148 return _injected_fields + start;
149 }
150 return nullptr;
151 }
152
153
154 // Helpful routine for computing field offsets at run time rather than hardcoding them
155 // Finds local fields only, including static fields. Static field offsets are from the
156 // beginning of the mirror.
157 void JavaClasses::compute_offset(int &dest_offset,
158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
159 bool is_static) {
160 fieldDescriptor fd;
161 if (ik == nullptr) {
162 ResourceMark rm;
163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
164 vm_exit_during_initialization("Invalid layout of well-known class");
165 }
166
167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
168 ResourceMark rm;
169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
170 name_symbol->as_C_string(), signature_symbol->as_C_string());
171 #ifndef PRODUCT
172 // Prints all fields and offsets
173 Log(class) lt;
174 LogStream ls(lt.error());
175 ik->print_on(&ls);
176 #endif //PRODUCT
177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
178 }
179 dest_offset = fd.offset();
180 }
181
182 // Overloading to pass name as a string.
183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
184 const char* name_string, Symbol* signature_symbol,
185 bool is_static) {
186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
187 if (name == nullptr) {
188 ResourceMark rm;
189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
191 }
192 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
193 }
194
195 // java_lang_String
196
197 int java_lang_String::_value_offset;
198 int java_lang_String::_hash_offset;
199 int java_lang_String::_hashIsZero_offset;
200 int java_lang_String::_coder_offset;
201 int java_lang_String::_flags_offset;
202
203 bool java_lang_String::_initialized;
204
205
206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
207 uint8_t* addr = flags_addr(java_string);
208 uint8_t value = Atomic::load(addr);
209 while ((value & flag_mask) == 0) {
210 uint8_t old_value = value;
211 value |= flag_mask;
212 value = Atomic::cmpxchg(addr, old_value, value);
213 if (value == old_value) return false; // Flag bit changed from 0 to 1.
214 }
215 return true; // Flag bit is already 1.
216 }
217
218 #define STRING_FIELDS_DO(macro) \
219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
220 macro(_hash_offset, k, "hash", int_signature, false); \
221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
222 macro(_coder_offset, k, "coder", byte_signature, false);
223
224 void java_lang_String::compute_offsets() {
225 if (_initialized) {
226 return;
227 }
228
229 InstanceKlass* k = vmClasses::String_klass();
230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
232
233 _initialized = true;
234 }
235
236 #if INCLUDE_CDS
237 void java_lang_String::serialize_offsets(SerializeClosure* f) {
238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
240 f->do_bool(&_initialized);
241 }
242 #endif
243
244 class CompactStringsFixup : public FieldClosure {
245 private:
246 bool _value;
247
248 public:
249 CompactStringsFixup(bool value) : _value(value) {}
250
251 void do_field(fieldDescriptor* fd) {
252 if (fd->name() == vmSymbols::compact_strings_name()) {
253 oop mirror = fd->field_holder()->java_mirror();
254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
255 assert(mirror != nullptr, "String must have mirror already");
256 mirror->bool_field_put(fd->offset(), _value);
257 }
258 }
259 };
260
261 void java_lang_String::set_compact_strings(bool value) {
262 CompactStringsFixup fix(value);
263 vmClasses::String_klass()->do_local_static_fields(&fix);
264 }
265
266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
267 assert(_initialized, "Must be initialized");
268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
269
270 // Create the String object first, so there's a chance that the String
271 // and the char array it points to end up in the same cache line.
272 oop obj;
273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
274
275 // Create the char array. The String object must be handlized here
276 // because GC can happen as a result of the allocation attempt.
277 Handle h_obj(THREAD, obj);
278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
280
281 // Point the String at the char array
282 obj = h_obj();
283 set_value(obj, buffer);
284 // No need to zero the offset, allocation zero'ed the entire String object
285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
286 return h_obj;
287 }
288
289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
292 typeArrayOop buffer = value(h_obj());
293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
294 if (is_latin1) {
295 for (int index = 0; index < length; index++) {
296 buffer->byte_at_put(index, (jbyte)unicode[index]);
297 }
298 } else {
299 for (int index = 0; index < length; index++) {
300 buffer->char_at_put(index, unicode[index]);
301 }
302 }
303
304 #ifdef ASSERT
305 {
306 ResourceMark rm;
307 size_t utf8_len = static_cast<size_t>(length);
308 char* expected = UNICODE::as_utf8(unicode, utf8_len);
309 char* actual = as_utf8_string(h_obj());
310 if (strcmp(expected, actual) != 0) {
311 fatal("Unicode conversion failure: %s --> %s", expected, actual);
312 }
313 }
314 #endif
315
316 return h_obj;
317 }
318
319 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
320 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
321 return h_obj();
322 }
323
324 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
325 if (utf8_str == nullptr) {
326 return Handle();
327 }
328 bool has_multibyte, is_latin1;
329 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
330 if (!CompactStrings) {
331 has_multibyte = true;
332 is_latin1 = false;
333 }
334
335 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
336 if (length > 0) {
337 if (!has_multibyte) {
338 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
339 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
340 } else if (is_latin1) {
341 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
342 } else {
343 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
344 }
345 }
346
347 #ifdef ASSERT
348 // This check is too strict when the input string is not a valid UTF8.
349 // For example, it may be created with arbitrary content via jni_NewStringUTF.
350 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
351 ResourceMark rm;
352 const char* expected = utf8_str;
353 char* actual = as_utf8_string(h_obj());
354 if (strcmp(expected, actual) != 0) {
355 fatal("String conversion failure: %s --> %s", expected, actual);
356 }
357 }
358 #endif
359
360 return h_obj;
361 }
362
363 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
364 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
365 return h_obj();
366 }
367
368 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
369 const char* utf8_str = (char*)symbol->bytes();
370 int utf8_len = symbol->utf8_length();
371
372 bool has_multibyte, is_latin1;
373 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
374 if (!CompactStrings) {
375 has_multibyte = true;
376 is_latin1 = false;
377 }
378
379 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
380 if (length > 0) {
381 if (!has_multibyte) {
382 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
383 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
384 } else if (is_latin1) {
385 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
386 } else {
387 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
388 }
389 }
390
391 #ifdef ASSERT
392 // This check is too strict on older classfile versions
393 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
394 {
395 ResourceMark rm;
396 const char* expected = symbol->as_utf8();
397 char* actual = as_utf8_string(h_obj());
398 if (strncmp(expected, actual, utf8_len) != 0) {
399 fatal("Symbol conversion failure: %s --> %s", expected, actual);
400 }
401 }
402 #endif
403
404 return h_obj;
405 }
406
407 // Converts a C string to a Java String based on current encoding
408 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
409 assert(str != nullptr, "bad arguments");
410
411 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
412 static to_java_string_fn_t _to_java_string_fn = nullptr;
413
414 if (_to_java_string_fn == nullptr) {
415 void *lib_handle = os::native_java_library();
416 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
417 if (_to_java_string_fn == nullptr) {
418 fatal("JNU_NewStringPlatform missing");
419 }
420 }
421
422 jstring js = nullptr;
423 {
424 JavaThread* thread = THREAD;
425 HandleMark hm(thread);
426 ThreadToNativeFromVM ttn(thread);
427 js = (_to_java_string_fn)(thread->jni_environment(), str);
428 }
429
430 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
431 JNIHandles::destroy_local(js); // destroy local JNIHandle.
432 return native_platform_string;
433 }
434
435 // Converts a Java String to a native C string that can be used for
436 // native OS calls.
437 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
438 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
439 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
440
441 if (_to_platform_string_fn == nullptr) {
442 void *lib_handle = os::native_java_library();
443 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
444 if (_to_platform_string_fn == nullptr) {
445 fatal("GetStringPlatformChars missing");
446 }
447 }
448
449 char *native_platform_string;
450 jstring js;
451 { JavaThread* thread = THREAD;
452 js = (jstring) JNIHandles::make_local(thread, java_string());
453 HandleMark hm(thread);
454 ThreadToNativeFromVM ttn(thread);
455 JNIEnv *env = thread->jni_environment();
456 bool is_copy;
457 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
458 assert(is_copy == JNI_TRUE, "is_copy value changed");
459 }
460
461 // Uses a store barrier and therefore needs to be in vm state
462 JNIHandles::destroy_local(js);
463
464 return native_platform_string;
465 }
466
467 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
468 ResourceMark rm(THREAD);
469 return create_from_str(java_name->as_klass_external_name(), THREAD);
470 }
471
472 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
473 jchar* result = as_unicode_string_or_null(java_string, length);
474 if (result == nullptr) {
475 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
476 }
477 return result;
478 }
479
480 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
481 typeArrayOop value = java_lang_String::value(java_string);
482 length = java_lang_String::length(java_string, value);
483 bool is_latin1 = java_lang_String::is_latin1(java_string);
484
485 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
486 if (result != nullptr) {
487 if (!is_latin1) {
488 for (int index = 0; index < length; index++) {
489 result[index] = value->char_at(index);
490 }
491 } else {
492 for (int index = 0; index < length; index++) {
493 result[index] = ((jchar) value->byte_at(index)) & 0xff;
494 }
495 }
496 }
497 return result;
498 }
499
500 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
501 // The hash and hashIsZero fields are subject to a benign data race,
502 // making it crucial to ensure that any observable result of the
503 // calculation in this method stays correct under any possible read of
504 // these fields. Necessary restrictions to allow this to be correct
505 // without explicit memory fences or similar concurrency primitives is
506 // that we can ever only write to one of these two fields for a given
507 // String instance, and that the computation is idempotent and derived
508 // from immutable state
509 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
510 if (java_lang_String::hash_is_set(java_string)) {
511 return java_string->int_field(_hash_offset);
512 }
513
514 typeArrayOop value = java_lang_String::value(java_string);
515 int length = java_lang_String::length(java_string, value);
516 bool is_latin1 = java_lang_String::is_latin1(java_string);
517
518 unsigned int hash = 0;
519 if (length > 0) {
520 if (is_latin1) {
521 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
522 } else {
523 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
524 }
525 }
526
527 if (update) {
528 if (hash != 0) {
529 java_string->int_field_put(_hash_offset, hash);
530 } else {
531 java_string->bool_field_put(_hashIsZero_offset, true);
532 }
533 }
534 return hash;
535 }
536
537 unsigned int java_lang_String::hash_code(oop java_string) {
538 return hash_code_impl(java_string, /*update=*/true);
539 }
540
541 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
542 return hash_code_impl(java_string, /*update=*/false);
543 }
544
545
546 char* java_lang_String::as_quoted_ascii(oop java_string) {
547 typeArrayOop value = java_lang_String::value(java_string);
548 int length = java_lang_String::length(java_string, value);
549 bool is_latin1 = java_lang_String::is_latin1(java_string);
550
551 if (length == 0) return nullptr;
552
553 char* result;
554 size_t result_length;
555 if (!is_latin1) {
556 jchar* base = value->char_at_addr(0);
557 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
558 result = NEW_RESOURCE_ARRAY(char, result_length);
559 UNICODE::as_quoted_ascii(base, length, result, result_length);
560 } else {
561 jbyte* base = value->byte_at_addr(0);
562 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
563 result = NEW_RESOURCE_ARRAY(char, result_length);
564 UNICODE::as_quoted_ascii(base, length, result, result_length);
565 }
566 assert(result_length >= (size_t)length + 1, "must not be shorter");
567 assert(result_length == strlen(result) + 1, "must match");
568 return result;
569 }
570
571 Symbol* java_lang_String::as_symbol(oop java_string) {
572 typeArrayOop value = java_lang_String::value(java_string);
573 int length = java_lang_String::length(java_string, value);
574 bool is_latin1 = java_lang_String::is_latin1(java_string);
575 if (!is_latin1) {
576 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
577 Symbol* sym = SymbolTable::new_symbol(base, length);
578 return sym;
579 } else {
580 ResourceMark rm;
581 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
582 size_t utf8_len = static_cast<size_t>(length);
583 const char* base = UNICODE::as_utf8(position, utf8_len);
584 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
585 return sym;
586 }
587 }
588
589 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
590 typeArrayOop value = java_lang_String::value(java_string);
591 int length = java_lang_String::length(java_string, value);
592 bool is_latin1 = java_lang_String::is_latin1(java_string);
593 if (!is_latin1) {
594 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
595 return SymbolTable::probe_unicode(base, length);
596 } else {
597 ResourceMark rm;
598 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
599 size_t utf8_len = static_cast<size_t>(length);
600 const char* base = UNICODE::as_utf8(position, utf8_len);
601 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
602 }
603 }
604
605 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
606 assert(value_equals(value, java_lang_String::value(java_string)),
607 "value must be same as java_lang_String::value(java_string)");
608 int length = java_lang_String::length(java_string, value);
609 if (length == 0) {
610 return 0;
611 }
612 if (!java_lang_String::is_latin1(java_string)) {
613 return UNICODE::utf8_length(value->char_at_addr(0), length);
614 } else {
615 return UNICODE::utf8_length(value->byte_at_addr(0), length);
616 }
617 }
618
619 size_t java_lang_String::utf8_length(oop java_string) {
620 typeArrayOop value = java_lang_String::value(java_string);
621 return utf8_length(java_string, value);
622 }
623
624 int java_lang_String::utf8_length_as_int(oop java_string) {
625 typeArrayOop value = java_lang_String::value(java_string);
626 return utf8_length_as_int(java_string, value);
627 }
628
629 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
630 assert(value_equals(value, java_lang_String::value(java_string)),
631 "value must be same as java_lang_String::value(java_string)");
632 int length = java_lang_String::length(java_string, value);
633 if (length == 0) {
634 return 0;
635 }
636 if (!java_lang_String::is_latin1(java_string)) {
637 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
638 } else {
639 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
640 }
641 }
642
643 char* java_lang_String::as_utf8_string(oop java_string) {
644 size_t length;
645 return as_utf8_string(java_string, length);
646 }
647
648 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
649 typeArrayOop value = java_lang_String::value(java_string);
650 // `length` is used as the incoming number of characters to
651 // convert, and then set as the number of bytes in the UTF8 sequence.
652 length = java_lang_String::length(java_string, value);
653 bool is_latin1 = java_lang_String::is_latin1(java_string);
654 if (!is_latin1) {
655 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
656 return UNICODE::as_utf8(position, length);
657 } else {
658 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
659 return UNICODE::as_utf8(position, length);
660 }
661 }
662
663 // Uses a provided buffer if it's sufficiently large, otherwise allocates
664 // a resource array to fit
665 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
666 typeArrayOop value = java_lang_String::value(java_string);
667 int len = java_lang_String::length(java_string, value);
668 bool is_latin1 = java_lang_String::is_latin1(java_string);
669 if (!is_latin1) {
670 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
671 utf8_len = UNICODE::utf8_length(position, len);
672 if (utf8_len >= buflen) {
673 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
674 }
675 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
676 } else {
677 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
678 utf8_len = UNICODE::utf8_length(position, len);
679 if (utf8_len >= buflen) {
680 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
681 }
682 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
683 }
684 }
685
686 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
687 assert(value_equals(value, java_lang_String::value(java_string)),
688 "value must be same as java_lang_String::value(java_string)");
689 int length = java_lang_String::length(java_string, value);
690 bool is_latin1 = java_lang_String::is_latin1(java_string);
691 if (!is_latin1) {
692 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
693 return UNICODE::as_utf8(position, length, buf, buflen);
694 } else {
695 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
696 return UNICODE::as_utf8(position, length, buf, buflen);
697 }
698 }
699
700 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
701 typeArrayOop value = java_lang_String::value(java_string);
702 return as_utf8_string(java_string, value, buf, buflen);
703 }
704
705 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
706 // `length` is used as the incoming number of characters to
707 // convert, and then set as the number of bytes in the UTF8 sequence.
708 size_t length = static_cast<size_t>(len);
709 typeArrayOop value = java_lang_String::value(java_string);
710 bool is_latin1 = java_lang_String::is_latin1(java_string);
711 assert(start + len <= java_lang_String::length(java_string), "just checking");
712 if (!is_latin1) {
713 jchar* position = value->char_at_addr(start);
714 return UNICODE::as_utf8(position, length);
715 } else {
716 jbyte* position = value->byte_at_addr(start);
717 return UNICODE::as_utf8(position, length);
718 }
719 }
720
721 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
722 assert(value_equals(value, java_lang_String::value(java_string)),
723 "value must be same as java_lang_String::value(java_string)");
724 assert(start + len <= java_lang_String::length(java_string), "just checking");
725 bool is_latin1 = java_lang_String::is_latin1(java_string);
726 if (!is_latin1) {
727 jchar* position = value->char_at_addr(start);
728 return UNICODE::as_utf8(position, len, buf, buflen);
729 } else {
730 jbyte* position = value->byte_at_addr(start);
731 return UNICODE::as_utf8(position, len, buf, buflen);
732 }
733 }
734
735 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
736 assert(java_string->klass() == vmClasses::String_klass(),
737 "must be java_string");
738 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
739 int length = java_lang_String::length(java_string, value);
740 if (length != len) {
741 return false;
742 }
743 bool is_latin1 = java_lang_String::is_latin1(java_string);
744 if (!is_latin1) {
745 for (int i = 0; i < len; i++) {
746 if (value->char_at(i) != chars[i]) {
747 return false;
748 }
749 }
750 } else {
751 for (int i = 0; i < len; i++) {
752 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
753 return false;
754 }
755 }
756 }
757 return true;
758 }
759
760 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
761 assert(java_string->klass() == vmClasses::String_klass(),
762 "must be java_string");
763 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
764 int length = java_lang_String::length(java_string, value);
765 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
766 if (length != unicode_length) {
767 return false;
768 }
769 bool is_latin1 = java_lang_String::is_latin1(java_string);
770 jchar c;
771 if (!is_latin1) {
772 for (int i = 0; i < unicode_length; i++) {
773 utf8_string = UTF8::next(utf8_string, &c);
774 if (value->char_at(i) != c) {
775 return false;
776 }
777 }
778 } else {
779 for (int i = 0; i < unicode_length; i++) {
780 utf8_string = UTF8::next(utf8_string, &c);
781 if ((((jchar) value->byte_at(i)) & 0xff) != c) {
782 return false;
783 }
784 }
785 }
786 return true;
787 }
788
789 bool java_lang_String::equals(oop str1, oop str2) {
790 assert(str1->klass() == vmClasses::String_klass(),
791 "must be java String");
792 assert(str2->klass() == vmClasses::String_klass(),
793 "must be java String");
794 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
795 bool is_latin1 = java_lang_String::is_latin1(str1);
796 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
797 bool is_latin2 = java_lang_String::is_latin1(str2);
798
799 if (is_latin1 != is_latin2) {
800 // Strings with different coders are never equal.
801 return false;
802 }
803 return value_equals(value1, value2);
804 }
805
806 // Print the given string to the given outputStream, limiting the output to
807 // at most max_length of the string's characters. If the length exceeds the
808 // limit we print an abridged version of the string with the "middle" elided
809 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
810 // it is treated as max_length-1.
811 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
812 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
813 // We need at least two characters to print A ... B
814 assert(max_length > 1, "invalid max_length: %d", max_length);
815
816 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
817
818 if (value == nullptr) {
819 // This can happen if, e.g., printing a String
820 // object before its initializer has been called
821 st->print("nullptr");
822 return;
823 }
824
825 int length = java_lang_String::length(java_string, value);
826 bool is_latin1 = java_lang_String::is_latin1(java_string);
827
828 bool abridge = length > max_length;
829
830 st->print("\"");
831 for (int index = 0; index < length; index++) {
832 // If we need to abridge and we've printed half the allowed characters
833 // then jump to the tail of the string.
834 if (abridge && index >= max_length / 2) {
835 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
836 index = length - (max_length / 2);
837 abridge = false; // only do this once
838 }
839 jchar c = (!is_latin1) ? value->char_at(index) :
840 ((jchar) value->byte_at(index)) & 0xff;
841 if (c < ' ') {
842 st->print("\\x%02X", c); // print control characters e.g. \x0A
843 } else {
844 st->print("%c", c);
845 }
846 }
847 st->print("\"");
848
849 if (length > max_length) {
850 st->print(" (abridged) ");
851 }
852 }
853
854 // java_lang_Class
855
856 int java_lang_Class::_klass_offset;
857 int java_lang_Class::_array_klass_offset;
858 int java_lang_Class::_oop_size_offset;
859 int java_lang_Class::_static_oop_field_count_offset;
860 int java_lang_Class::_class_loader_offset;
861 int java_lang_Class::_module_offset;
862 int java_lang_Class::_protection_domain_offset;
863 int java_lang_Class::_component_mirror_offset;
864 int java_lang_Class::_init_lock_offset;
865 int java_lang_Class::_signers_offset;
866 int java_lang_Class::_name_offset;
867 int java_lang_Class::_source_file_offset;
868 int java_lang_Class::_classData_offset;
869 int java_lang_Class::_classRedefinedCount_offset;
870 int java_lang_Class::_reflectionData_offset;
871
872 bool java_lang_Class::_offsets_computed = false;
873 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
874 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
875
876 #ifdef ASSERT
877 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
878 assert(fd->has_initial_value(), "caller should have checked this");
879 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
880 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
881 }
882 #endif
883
884 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
885 DEBUG_ONLY(assert_valid_static_string_field(fd);)
886 oop string = fd->string_initial_value(CHECK);
887 mirror()->obj_field_put(fd->offset(), string);
888 }
889
890 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
891 assert(fd->has_initial_value(), "caller should have checked this");
892 BasicType t = fd->field_type();
893 switch (t) {
894 case T_BYTE:
895 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
896 break;
897 case T_BOOLEAN:
898 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
899 break;
900 case T_CHAR:
901 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
902 break;
903 case T_SHORT:
904 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
905 break;
906 case T_INT:
907 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
908 break;
909 case T_FLOAT:
910 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
911 break;
912 case T_DOUBLE:
913 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
914 break;
915 case T_LONG:
916 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
917 break;
918 default:
919 // Illegal ConstantValue attribute in class file should have been
920 // caught during classfile parsing.
921 ShouldNotReachHere();
922 }
923 }
924
925 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
926 assert(mirror.not_null() && fd->is_static(), "just checking");
927 if (fd->has_initial_value()) {
928 if (fd->field_type() != T_OBJECT) {
929 initialize_static_primitive_field(fd, mirror);
930 } else {
931 initialize_static_string_field(fd, mirror, CHECK);
932 }
933 }
934 }
935
936 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
937 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
938
939 // If the offset was read from the shared archive, it was fixed up already
940 if (!k->is_shared()) {
941 if (k->is_instance_klass()) {
942 // During bootstrap, java.lang.Class wasn't loaded so static field
943 // offsets were computed without the size added it. Go back and
944 // update all the static field offsets to included the size.
945
946 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
947 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
948 // static fields offsets are updated in this array before reencoding everything into
949 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
950
951 int java_fields;
952 int injected_fields;
953 InstanceKlass* ik = InstanceKlass::cast(k);
954 GrowableArray<FieldInfo>* fields =
955 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
956 &java_fields, &injected_fields);
957 for (int i = 0; i < fields->length(); i++) {
958 FieldInfo* fi = fields->adr_at(i);
959 if (fi->access_flags().is_static()) {
960 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
961 }
962 }
963 Array<u1>* old_stream = ik->fieldinfo_stream();
964 assert(fields->length() == (java_fields + injected_fields), "Must be");
965 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
966 ik->set_fieldinfo_stream(new_fis);
967 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
968 }
969 }
970
971 if (k->is_shared() && k->has_archived_mirror_index()) {
972 if (ArchiveHeapLoader::is_in_use()) {
973 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
974 assert(present, "Missing archived mirror for %s", k->external_name());
975 return;
976 } else {
977 k->clear_java_mirror_handle();
978 k->clear_archived_mirror_index();
979 }
980 }
981 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
982 }
983
984 void java_lang_Class::initialize_mirror_fields(Klass* k,
985 Handle mirror,
986 Handle protection_domain,
987 Handle classData,
988 TRAPS) {
989 // Allocate a simple java object for a lock.
990 // This needs to be a java object because during class initialization
991 // it can be held across a java call.
992 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
993 set_init_lock(mirror(), r);
994
995 // Set protection domain also
996 set_protection_domain(mirror(), protection_domain());
997
998 // Initialize static fields
999 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1000
1001 // Set classData
1002 set_class_data(mirror(), classData());
1003 }
1004
1005 // Set the java.lang.Module module field in the java_lang_Class mirror
1006 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1007 if (module.is_null()) {
1008 // During startup, the module may be null only if java.base has not been defined yet.
1009 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1010 // for java.base is known. But note that since we captured the null module another
1011 // thread may have completed that initialization.
1012
1013 bool javabase_was_defined = false;
1014 {
1015 MutexLocker m1(current, Module_lock);
1016 // Keep list of classes needing java.base module fixup
1017 if (!ModuleEntryTable::javabase_defined()) {
1018 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1019 k->class_loader_data()->inc_keep_alive_ref_count();
1020 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1021 fixup_module_field_list()->push(k);
1022 } else {
1023 javabase_was_defined = true;
1024 }
1025 }
1026
1027 // If java.base was already defined then patch this particular class with java.base.
1028 if (javabase_was_defined) {
1029 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1030 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
1031 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1032 Handle javabase_handle(current, javabase_entry->module());
1033 set_module(mirror(), javabase_handle());
1034 }
1035 } else {
1036 assert(Universe::is_module_initialized() ||
1037 (ModuleEntryTable::javabase_defined() &&
1038 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
1039 "Incorrect java.lang.Module specification while creating mirror");
1040 set_module(mirror(), module());
1041 }
1042 }
1043
1044 // Statically allocate fixup lists because they always get created.
1045 void java_lang_Class::allocate_fixup_lists() {
1046 GrowableArray<Klass*>* mirror_list =
1047 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1048 set_fixup_mirror_list(mirror_list);
1049
1050 GrowableArray<Klass*>* module_list =
1051 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1052 set_fixup_module_field_list(module_list);
1053 }
1054
1055 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1056 Handle& mirror, Handle& comp_mirror, TRAPS) {
1057 // Allocate mirror (java.lang.Class instance)
1058 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1059 mirror = Handle(THREAD, mirror_oop);
1060
1061 // Setup indirection from mirror->klass
1062 set_klass(mirror(), k);
1063
1064 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1065 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1066
1067 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1068
1069 // It might also have a component mirror. This mirror must already exist.
1070 if (k->is_array_klass()) {
1071 if (k->is_typeArray_klass()) {
1072 BasicType type = TypeArrayKlass::cast(k)->element_type();
1073 if (is_scratch) {
1074 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1075 } else {
1076 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1077 }
1078 } else {
1079 assert(k->is_objArray_klass(), "Must be");
1080 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1081 assert(element_klass != nullptr, "Must have an element klass");
1082 if (is_scratch) {
1083 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1084 } else {
1085 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1086 }
1087 }
1088 assert(comp_mirror() != nullptr, "must have a mirror");
1089
1090 // Two-way link between the array klass and its component mirror:
1091 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1092 set_component_mirror(mirror(), comp_mirror());
1093 // See below for ordering dependencies between field array_klass in component mirror
1094 // and java_mirror in this klass.
1095 } else {
1096 assert(k->is_instance_klass(), "Must be");
1097
1098 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1099 if (HAS_PENDING_EXCEPTION) {
1100 // If any of the fields throws an exception like OOM remove the klass field
1101 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1102 // This mirror looks like a primitive type, which logically it is because it
1103 // it represents no class.
1104 set_klass(mirror(), nullptr);
1105 return;
1106 }
1107 }
1108 }
1109
1110 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1111 Handle module, Handle protection_domain,
1112 Handle classData, TRAPS) {
1113 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1114 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1115
1116 // Use this moment of initialization to cache modifier_flags also,
1117 // to support Class.getModifiers(). Instance classes recalculate
1118 // the cached flags after the class file is parsed, but before the
1119 // class is put into the system dictionary.
1120 int computed_modifiers = k->compute_modifier_flags();
1121 k->set_modifier_flags(computed_modifiers);
1122 // Class_klass has to be loaded because it is used to allocate
1123 // the mirror.
1124 if (vmClasses::Class_klass_loaded()) {
1125 Handle mirror;
1126 Handle comp_mirror;
1127
1128 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1129
1130 // set the classLoader field in the java_lang_Class instance
1131 assert(class_loader() == k->class_loader(), "should be same");
1132 set_class_loader(mirror(), class_loader());
1133
1134 // Setup indirection from klass->mirror
1135 // after any exceptions can happen during allocations.
1136 k->set_java_mirror(mirror);
1137
1138 // Set the module field in the java_lang_Class instance. This must be done
1139 // after the mirror is set.
1140 set_mirror_module_field(THREAD, k, mirror, module);
1141
1142 if (comp_mirror() != nullptr) {
1143 // Set after k->java_mirror() is published, because compiled code running
1144 // concurrently doesn't expect a k to have a null java_mirror.
1145 release_set_array_klass(comp_mirror(), k);
1146 }
1147 if (CDSConfig::is_dumping_heap()) {
1148 if (CDSConfig::is_dumping_protection_domains()) {
1149 create_scratch_mirror(k, protection_domain, CHECK);
1150 } else {
1151 create_scratch_mirror(k, Handle() /* null protection_domain*/, CHECK);
1152 }
1153 }
1154 } else {
1155 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1156 fixup_mirror_list()->push(k);
1157 }
1158 }
1159
1160 #if INCLUDE_CDS_JAVA_HEAP
1161 // The "scratch mirror" stores the states of the mirror object that can be
1162 // decided at dump time (such as the initial values of the static fields, the
1163 // component mirror, etc). At runtime, more information is added to it by
1164 // java_lang_Class::restore_archived_mirror().
1165 //
1166 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1167 // produces the same result as /*runtime*/create_mirror().
1168 //
1169 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1170 // latter may contain dumptime-specific information that cannot be archived
1171 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1172 void java_lang_Class::create_scratch_mirror(Klass* k, Handle protection_domain, TRAPS) {
1173 if (k->class_loader() != nullptr &&
1174 k->class_loader() != SystemDictionary::java_platform_loader() &&
1175 k->class_loader() != SystemDictionary::java_system_loader()) {
1176 // We only archive the mirrors of classes loaded by the built-in loaders
1177 return;
1178 }
1179
1180 Handle classData; // set to null. Will be reinitialized at runtime
1181 Handle mirror;
1182 Handle comp_mirror;
1183 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1184
1185 if (comp_mirror() != nullptr) {
1186 release_set_array_klass(comp_mirror(), k);
1187 }
1188
1189 HeapShared::set_scratch_java_mirror(k, mirror());
1190 }
1191
1192 // Returns true if the mirror is updated, false if no archived mirror
1193 // data is present. After the archived mirror object is restored, the
1194 // shared klass' _has_raw_archived_mirror flag is cleared.
1195 bool java_lang_Class::restore_archived_mirror(Klass *k,
1196 Handle class_loader, Handle module,
1197 Handle protection_domain, TRAPS) {
1198 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1199 // see more details in vmClasses::resolve_all().
1200 if (!vmClasses::Class_klass_loaded()) {
1201 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1202 fixup_mirror_list()->push(k);
1203 return true;
1204 }
1205
1206 oop m = k->archived_java_mirror();
1207 assert(m != nullptr, "must have stored non-null archived mirror");
1208
1209 // Sanity: clear it now to prevent re-initialization if any of the following fails
1210 k->clear_archived_mirror_index();
1211
1212 // mirror is archived, restore
1213 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1214 assert(as_Klass(m) == k, "must be");
1215 Handle mirror(THREAD, m);
1216
1217 if (!k->is_array_klass()) {
1218 // - local static final fields with initial values were initialized at dump time
1219
1220 // create the init_lock
1221 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1222 set_init_lock(mirror(), r);
1223
1224 if (protection_domain.not_null()) {
1225 set_protection_domain(mirror(), protection_domain());
1226 }
1227 }
1228
1229 assert(class_loader() == k->class_loader(), "should be same");
1230 if (class_loader.not_null()) {
1231 set_class_loader(mirror(), class_loader());
1232 }
1233
1234 k->set_java_mirror(mirror);
1235
1236 set_mirror_module_field(THREAD, k, mirror, module);
1237
1238 if (log_is_enabled(Trace, cds, heap, mirror)) {
1239 ResourceMark rm(THREAD);
1240 log_trace(cds, heap, mirror)(
1241 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1242 }
1243
1244 return true;
1245 }
1246 #endif // INCLUDE_CDS_JAVA_HEAP
1247
1248 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1249 assert(_module_offset != 0, "must have been computed already");
1250 set_module(k->java_mirror(), module());
1251 }
1252
1253 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1254 assert(_oop_size_offset != 0, "must be set");
1255 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1256 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1257 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1258 }
1259
1260 int java_lang_Class::static_oop_field_count(oop java_class) {
1261 assert(_static_oop_field_count_offset != 0, "must be set");
1262 return java_class->int_field(_static_oop_field_count_offset);
1263 }
1264
1265 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1266 assert(_static_oop_field_count_offset != 0, "must be set");
1267 java_class->int_field_put(_static_oop_field_count_offset, size);
1268 }
1269
1270 oop java_lang_Class::protection_domain(oop java_class) {
1271 assert(_protection_domain_offset != 0, "must be set");
1272 return java_class->obj_field(_protection_domain_offset);
1273 }
1274 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1275 assert(_protection_domain_offset != 0, "must be set");
1276 java_class->obj_field_put(_protection_domain_offset, pd);
1277 }
1278
1279 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1280 assert(_component_mirror_offset != 0, "must be set");
1281 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
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 oop java_lang_Class::reflection_data(oop java_class) {
1312 assert(_reflectionData_offset != 0, "must be set");
1313 return java_class->obj_field(_reflectionData_offset);
1314 }
1315
1316 bool java_lang_Class::has_reflection_data(oop java_class) {
1317 return (java_lang_Class::reflection_data(java_class) != nullptr);
1318 }
1319
1320 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1321 assert(_reflectionData_offset != 0, "must be set");
1322 java_class->obj_field_put(_reflectionData_offset, reflection_data);
1323 }
1324
1325 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1326 assert(_class_loader_offset != 0, "offsets should have been initialized");
1327 java_class->obj_field_put(_class_loader_offset, loader);
1328 }
1329
1330 oop java_lang_Class::class_loader(oop java_class) {
1331 assert(_class_loader_offset != 0, "must be set");
1332 return java_class->obj_field(_class_loader_offset);
1333 }
1334
1335 oop java_lang_Class::module(oop java_class) {
1336 assert(_module_offset != 0, "must be set");
1337 return java_class->obj_field(_module_offset);
1338 }
1339
1340 void java_lang_Class::set_module(oop java_class, oop module) {
1341 assert(_module_offset != 0, "must be set");
1342 java_class->obj_field_put(_module_offset, module);
1343 }
1344
1345 oop java_lang_Class::name(Handle java_class, TRAPS) {
1346 assert(_name_offset != 0, "must be set");
1347 oop o = java_class->obj_field(_name_offset);
1348 if (o == nullptr) {
1349 o = StringTable::intern(as_external_name(java_class()), THREAD);
1350 java_class->obj_field_put(_name_offset, o);
1351 }
1352 return o;
1353 }
1354
1355 oop java_lang_Class::source_file(oop java_class) {
1356 assert(_source_file_offset != 0, "must be set");
1357 return java_class->obj_field(_source_file_offset);
1358 }
1359
1360 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1361 assert(_source_file_offset != 0, "must be set");
1362 java_class->obj_field_put(_source_file_offset, source_file);
1363 }
1364
1365 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1366 // This should be improved by adding a field at the Java level or by
1367 // introducing a new VM klass (see comment in ClassFileParser)
1368 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1369 if (type != T_VOID) {
1370 Klass* aklass = Universe::typeArrayKlass(type);
1371 assert(aklass != nullptr, "correct bootstrap");
1372 release_set_array_klass(java_class, aklass);
1373 }
1374 #ifdef ASSERT
1375 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1376 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1377 #endif
1378 return java_class;
1379 }
1380
1381 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1382 assert(is_instance(java_class), "must be a Class object");
1383 java_class->metadata_field_put(_klass_offset, klass);
1384 }
1385
1386
1387 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1388 assert(is_instance(java_class), "must be a Class object");
1389 Symbol* name = nullptr;
1390 bool is_instance = false;
1391 if (is_primitive(java_class)) {
1392 name = vmSymbols::type_signature(primitive_type(java_class));
1393 } else {
1394 Klass* k = as_Klass(java_class);
1395 is_instance = k->is_instance_klass();
1396 name = k->name();
1397 }
1398 if (name == nullptr) {
1399 st->print("<null>");
1400 return;
1401 }
1402 if (is_instance) st->print("L");
1403 st->write((char*) name->base(), (int) name->utf8_length());
1404 if (is_instance) st->print(";");
1405 }
1406
1407 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1408 assert(is_instance(java_class), "must be a Class object");
1409 Symbol* name;
1410 if (is_primitive(java_class)) {
1411 name = vmSymbols::type_signature(primitive_type(java_class));
1412 // Because this can create a new symbol, the caller has to decrement
1413 // the refcount, so make adjustment here and below for symbols returned
1414 // that are not created or incremented due to a successful lookup.
1415 name->increment_refcount();
1416 } else {
1417 Klass* k = as_Klass(java_class);
1418 if (!k->is_instance_klass()) {
1419 name = k->name();
1420 name->increment_refcount();
1421 } else {
1422 ResourceMark rm;
1423 const char* sigstr = k->signature_name();
1424 int siglen = (int) strlen(sigstr);
1425 if (!intern_if_not_found) {
1426 name = SymbolTable::probe(sigstr, siglen);
1427 } else {
1428 name = SymbolTable::new_symbol(sigstr, siglen);
1429 }
1430 }
1431 }
1432 return name;
1433 }
1434
1435 // Returns the Java name for this Java mirror (Resource allocated)
1436 // See Klass::external_name().
1437 // For primitive type Java mirrors, its type name is returned.
1438 const char* java_lang_Class::as_external_name(oop java_class) {
1439 assert(is_instance(java_class), "must be a Class object");
1440 const char* name = nullptr;
1441 if (is_primitive(java_class)) {
1442 name = type2name(primitive_type(java_class));
1443 } else {
1444 name = as_Klass(java_class)->external_name();
1445 }
1446 if (name == nullptr) {
1447 name = "<null>";
1448 }
1449 return name;
1450 }
1451
1452 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1453 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1454 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1455 return k;
1456 }
1457
1458
1459 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1460 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1461 java_class->release_metadata_field_put(_array_klass_offset, klass);
1462 }
1463
1464
1465 BasicType java_lang_Class::primitive_type(oop java_class) {
1466 assert(is_primitive(java_class), "just checking");
1467 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1468 BasicType type = T_VOID;
1469 if (ak != nullptr) {
1470 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1471 type = ArrayKlass::cast(ak)->element_type();
1472 } else {
1473 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1474 }
1475 #ifdef ASSERT
1476 if (CDSConfig::is_dumping_heap()) {
1477 oop mirror = Universe::java_mirror(type);
1478 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1479 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1480 } else {
1481 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1482 }
1483 #endif
1484 return type;
1485 }
1486
1487 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1488 assert(is_instance(java_class), "must be a Class object");
1489 if (is_primitive(java_class)) {
1490 if (reference_klass != nullptr)
1491 (*reference_klass) = nullptr;
1492 return primitive_type(java_class);
1493 } else {
1494 if (reference_klass != nullptr)
1495 (*reference_klass) = as_Klass(java_class);
1496 return T_OBJECT;
1497 }
1498 }
1499
1500
1501 oop java_lang_Class::primitive_mirror(BasicType t) {
1502 oop mirror = Universe::java_mirror(t);
1503 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1504 assert(is_primitive(mirror), "must be primitive");
1505 return mirror;
1506 }
1507
1508 #define CLASS_FIELDS_DO(macro) \
1509 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1510 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1511 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1512 macro(_module_offset, k, "module", module_signature, false); \
1513 macro(_name_offset, k, "name", string_signature, false); \
1514 macro(_classData_offset, k, "classData", object_signature, false); \
1515 macro(_reflectionData_offset, k, "reflectionData", class_ReflectionData_signature, false); \
1516 macro(_signers_offset, k, "signers", object_array_signature, false);
1517
1518 void java_lang_Class::compute_offsets() {
1519 if (_offsets_computed) {
1520 return;
1521 }
1522
1523 _offsets_computed = true;
1524
1525 InstanceKlass* k = vmClasses::Class_klass();
1526 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1527 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1528 }
1529
1530 #if INCLUDE_CDS
1531 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1532 f->do_bool(&_offsets_computed);
1533
1534 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1535
1536 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1537 }
1538 #endif
1539
1540 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1541 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1542 return the_class_mirror->int_field(_classRedefinedCount_offset);
1543 }
1544
1545 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1546 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1547 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1548 }
1549
1550
1551 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1552 // platform thread structure, and a eetop offset which was used for thread
1553 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1554 // merged, so in the HotSpot VM we just use the eetop field for the thread
1555 // instead of the privateInfo_offset.
1556 //
1557 // Note: The stackSize field is only present starting in 1.4.
1558
1559 int java_lang_Thread_FieldHolder::_group_offset;
1560 int java_lang_Thread_FieldHolder::_priority_offset;
1561 int java_lang_Thread_FieldHolder::_stackSize_offset;
1562 int java_lang_Thread_FieldHolder::_daemon_offset;
1563 int java_lang_Thread_FieldHolder::_thread_status_offset;
1564
1565 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1566 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1567 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1568 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1569 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1570 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1571
1572 void java_lang_Thread_FieldHolder::compute_offsets() {
1573 assert(_group_offset == 0, "offsets should be initialized only once");
1574
1575 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1576 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1577 }
1578
1579 #if INCLUDE_CDS
1580 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1581 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1582 }
1583 #endif
1584
1585 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1586 return holder->obj_field(_group_offset);
1587 }
1588
1589 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1590 return (ThreadPriority)holder->int_field(_priority_offset);
1591 }
1592
1593 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1594 holder->int_field_put(_priority_offset, priority);
1595 }
1596
1597 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1598 return holder->long_field(_stackSize_offset);
1599 }
1600
1601 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1602 return holder->bool_field(_daemon_offset) != 0;
1603 }
1604
1605 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1606 assert(val, "daemon status is never turned off");
1607 holder->bool_field_put(_daemon_offset, val);
1608 }
1609
1610 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1611 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1612 }
1613
1614 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1615 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1616 }
1617
1618
1619 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1620
1621 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1622 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1623
1624 void java_lang_Thread_Constants::compute_offsets() {
1625 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1626
1627 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1628 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1629 }
1630
1631 #if INCLUDE_CDS
1632 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1633 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1634 }
1635 #endif
1636
1637 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1638 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1639 oop base = k->static_field_base_raw();
1640 return base->obj_field(_static_VTHREAD_GROUP_offset);
1641 }
1642
1643
1644 int java_lang_Thread::_holder_offset;
1645 int java_lang_Thread::_name_offset;
1646 int java_lang_Thread::_contextClassLoader_offset;
1647 int java_lang_Thread::_eetop_offset;
1648 int java_lang_Thread::_jvmti_thread_state_offset;
1649 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1650 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1651 int java_lang_Thread::_interrupted_offset;
1652 int java_lang_Thread::_interruptLock_offset;
1653 int java_lang_Thread::_tid_offset;
1654 int java_lang_Thread::_continuation_offset;
1655 int java_lang_Thread::_park_blocker_offset;
1656 int java_lang_Thread::_scopedValueBindings_offset;
1657 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1658
1659 #define THREAD_FIELDS_DO(macro) \
1660 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1661 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1662 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1663 macro(_eetop_offset, k, "eetop", long_signature, false); \
1664 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1665 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1666 macro(_tid_offset, k, "tid", long_signature, false); \
1667 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1668 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1669 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1670
1671 void java_lang_Thread::compute_offsets() {
1672 assert(_holder_offset == 0, "offsets should be initialized only once");
1673
1674 InstanceKlass* k = vmClasses::Thread_klass();
1675 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1676 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1677 }
1678
1679 #if INCLUDE_CDS
1680 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1681 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1682 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1683 }
1684 #endif
1685
1686 JavaThread* java_lang_Thread::thread(oop java_thread) {
1687 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1688 }
1689
1690 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1691 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1692 }
1693
1694 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1695 java_thread->address_field_put(_eetop_offset, (address)thread);
1696 }
1697
1698 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1699 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1700 }
1701
1702 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1703 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1704 }
1705
1706 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1707 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1708 }
1709
1710 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1711 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1712 }
1713
1714 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1715 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1716 int val = VTMS_transition_disable_count(java_thread);
1717 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1718 }
1719
1720 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1721 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1722 int val = VTMS_transition_disable_count(java_thread);
1723 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1724 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1725 }
1726
1727 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1728 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1729 }
1730
1731 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1732 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1733 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1734 }
1735
1736 int java_lang_Thread::is_in_VTMS_transition_offset() {
1737 return _jvmti_is_in_VTMS_transition_offset;
1738 }
1739
1740 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1741 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1742 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1743 }
1744
1745 oop java_lang_Thread::holder(oop java_thread) {
1746 // Note: may return null if the thread is still attaching
1747 return java_thread->obj_field(_holder_offset);
1748 }
1749 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1750 return java_thread->obj_field(_interruptLock_offset);
1751 }
1752
1753 bool java_lang_Thread::interrupted(oop java_thread) {
1754 // Make sure the caller can safely access oops.
1755 assert(Thread::current()->is_VM_thread() ||
1756 (JavaThread::current()->thread_state() != _thread_blocked &&
1757 JavaThread::current()->thread_state() != _thread_in_native),
1758 "Unsafe access to oop");
1759 return java_thread->bool_field_volatile(_interrupted_offset);
1760 }
1761
1762 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1763 // Make sure the caller can safely access oops.
1764 assert(Thread::current()->is_VM_thread() ||
1765 (JavaThread::current()->thread_state() != _thread_blocked &&
1766 JavaThread::current()->thread_state() != _thread_in_native),
1767 "Unsafe access to oop");
1768 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1769 }
1770
1771
1772 oop java_lang_Thread::name(oop java_thread) {
1773 return java_thread->obj_field(_name_offset);
1774 }
1775
1776
1777 void java_lang_Thread::set_name(oop java_thread, oop name) {
1778 java_thread->obj_field_put(_name_offset, name);
1779 }
1780
1781 // Convenience macros for setting and getting Thread fields that
1782 // are actually stored in the FieldHolder object of the thread.
1783 // The FieldHolder can be null whilst a thread is attaching via
1784 // JNI, and when the main thread is attaching.
1785
1786 // The default value should be the default/zero initialized value
1787 // of the field as it would be in java.lang.Thread.FieldHolder.
1788 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1789 { \
1790 oop holder = java_lang_Thread::holder(java_thread); \
1791 if (holder != nullptr) \
1792 return java_lang_Thread_FieldHolder::field(holder); \
1793 else \
1794 return default_val; \
1795 }
1796
1797 // We should never be trying to set a field of an attaching thread.
1798 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1799 { \
1800 oop holder = java_lang_Thread::holder(java_thread); \
1801 assert(holder != nullptr, "Thread not fully initialized"); \
1802 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1803 }
1804
1805
1806 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1807 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1808 }
1809
1810
1811 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1812 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1813 }
1814
1815
1816 oop java_lang_Thread::threadGroup(oop java_thread) {
1817 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1818 }
1819
1820
1821 bool java_lang_Thread::is_alive(oop java_thread) {
1822 JavaThread* thr = java_lang_Thread::thread(java_thread);
1823 return (thr != nullptr);
1824 }
1825
1826
1827 bool java_lang_Thread::is_daemon(oop java_thread) {
1828 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1829 }
1830
1831
1832 void java_lang_Thread::set_daemon(oop java_thread) {
1833 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1834 }
1835
1836 oop java_lang_Thread::context_class_loader(oop java_thread) {
1837 return java_thread->obj_field(_contextClassLoader_offset);
1838 }
1839
1840
1841 jlong java_lang_Thread::stackSize(oop java_thread) {
1842 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1843 }
1844
1845 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1846 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1847 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1848 }
1849
1850 // Read thread status value from threadStatus field in java.lang.Thread java class.
1851 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1852 // Make sure the caller is operating on behalf of the VM or is
1853 // running VM code (state == _thread_in_vm).
1854 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1855 JavaThread::current()->thread_state() == _thread_in_vm,
1856 "Java Thread is not running in vm");
1857 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1858 }
1859
1860 ByteSize java_lang_Thread::thread_id_offset() {
1861 return in_ByteSize(_tid_offset);
1862 }
1863
1864 oop java_lang_Thread::park_blocker(oop java_thread) {
1865 return java_thread->obj_field(_park_blocker_offset);
1866 }
1867
1868 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1869 ThreadsListHandle tlh(JavaThread::current());
1870 JavaThread* thread;
1871 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1872 if (is_virtual) {
1873 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1874 if (carrier_thread == nullptr) {
1875 return nullptr;
1876 }
1877 thread = java_lang_Thread::thread(carrier_thread);
1878 } else {
1879 thread = java_lang_Thread::thread(java_thread);
1880 }
1881 if (thread == nullptr) {
1882 return nullptr;
1883 }
1884
1885 class GetStackTraceClosure : public HandshakeClosure {
1886 public:
1887 const Handle _java_thread;
1888 int _depth;
1889 bool _retry_handshake;
1890 GrowableArray<Method*>* _methods;
1891 GrowableArray<int>* _bcis;
1892
1893 GetStackTraceClosure(Handle java_thread) :
1894 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1895 _methods(nullptr), _bcis(nullptr) {
1896 }
1897 ~GetStackTraceClosure() {
1898 delete _methods;
1899 delete _bcis;
1900 }
1901
1902 bool read_reset_retry() {
1903 bool ret = _retry_handshake;
1904 // If we re-execute the handshake this method need to return false
1905 // when the handshake cannot be performed. (E.g. thread terminating)
1906 _retry_handshake = false;
1907 return ret;
1908 }
1909
1910 void do_thread(Thread* th) {
1911 if (!Thread::current()->is_Java_thread()) {
1912 _retry_handshake = true;
1913 return;
1914 }
1915
1916 JavaThread* thread = JavaThread::cast(th);
1917
1918 if (!thread->has_last_Java_frame()) {
1919 return;
1920 }
1921
1922 bool carrier = false;
1923 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1924 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1925 const ContinuationEntry* ce = thread->vthread_continuation();
1926 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1927 return; // not mounted
1928 }
1929 } else {
1930 carrier = (thread->vthread_continuation() != nullptr);
1931 }
1932
1933 const int max_depth = MaxJavaStackTraceDepth;
1934 const bool skip_hidden = !ShowHiddenFrames;
1935
1936 // Pick minimum length that will cover most cases
1937 int init_length = 64;
1938 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1939 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1940
1941 int total_count = 0;
1942 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1943 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1944 vfst.next()) {
1945
1946 if (skip_hidden && (vfst.method()->is_hidden() ||
1947 vfst.method()->is_continuation_enter_intrinsic())) {
1948 continue;
1949 }
1950
1951 _methods->push(vfst.method());
1952 _bcis->push(vfst.bci());
1953 total_count++;
1954 }
1955
1956 _depth = total_count;
1957 }
1958 };
1959
1960 // Handshake with target
1961 ResourceMark rm(THREAD);
1962 HandleMark hm(THREAD);
1963 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1964 do {
1965 Handshake::execute(&gstc, &tlh, thread);
1966 } while (gstc.read_reset_retry());
1967
1968 // Stop if no stack trace is found.
1969 if (gstc._depth == 0) {
1970 return nullptr;
1971 }
1972
1973 // Convert to StackTraceElement array
1974 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1975 assert(k != nullptr, "must be loaded in 1.4+");
1976 if (k->should_be_initialized()) {
1977 k->initialize(CHECK_NULL);
1978 }
1979 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1980
1981 for (int i = 0; i < gstc._depth; i++) {
1982 methodHandle method(THREAD, gstc._methods->at(i));
1983 oop element = java_lang_StackTraceElement::create(method,
1984 gstc._bcis->at(i),
1985 CHECK_NULL);
1986 trace->obj_at_put(i, element);
1987 }
1988
1989 return trace();
1990 }
1991
1992 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1993 JavaThreadStatus status = get_thread_status(java_thread);
1994 switch (status) {
1995 case JavaThreadStatus::NEW : return "NEW";
1996 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
1997 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
1998 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1999 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2000 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2001 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2002 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2003 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2004 default : return "UNKNOWN";
2005 };
2006 }
2007 int java_lang_ThreadGroup::_parent_offset;
2008 int java_lang_ThreadGroup::_name_offset;
2009 int java_lang_ThreadGroup::_maxPriority_offset;
2010 int java_lang_ThreadGroup::_daemon_offset;
2011
2012 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2013 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2014 return java_thread_group->obj_field(_parent_offset);
2015 }
2016
2017 // ("name as oop" accessor is not necessary)
2018
2019 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2020 oop name = java_thread_group->obj_field(_name_offset);
2021 // ThreadGroup.name can be null
2022 if (name != nullptr) {
2023 return java_lang_String::as_utf8_string(name);
2024 }
2025 return nullptr;
2026 }
2027
2028 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2029 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2030 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2031 }
2032
2033 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2034 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2035 return java_thread_group->bool_field(_daemon_offset) != 0;
2036 }
2037
2038 #define THREADGROUP_FIELDS_DO(macro) \
2039 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2040 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2041 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2042 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2043
2044 void java_lang_ThreadGroup::compute_offsets() {
2045 assert(_parent_offset == 0, "offsets should be initialized only once");
2046
2047 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2048 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2049 }
2050
2051 #if INCLUDE_CDS
2052 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2053 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2054 }
2055 #endif
2056
2057
2058 // java_lang_VirtualThread
2059
2060 int java_lang_VirtualThread::static_vthread_scope_offset;
2061 int java_lang_VirtualThread::_carrierThread_offset;
2062 int java_lang_VirtualThread::_continuation_offset;
2063 int java_lang_VirtualThread::_state_offset;
2064 int java_lang_VirtualThread::_next_offset;
2065 int java_lang_VirtualThread::_onWaitingList_offset;
2066 int java_lang_VirtualThread::_notified_offset;
2067 int java_lang_VirtualThread::_timeout_offset;
2068
2069 #define VTHREAD_FIELDS_DO(macro) \
2070 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2071 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2072 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2073 macro(_state_offset, k, "state", int_signature, false); \
2074 macro(_next_offset, k, "next", vthread_signature, false); \
2075 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2076 macro(_notified_offset, k, "notified", bool_signature, false); \
2077 macro(_timeout_offset, k, "timeout", long_signature, false);
2078
2079
2080 void java_lang_VirtualThread::compute_offsets() {
2081 InstanceKlass* k = vmClasses::VirtualThread_klass();
2082 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2083 }
2084
2085 bool java_lang_VirtualThread::is_instance(oop obj) {
2086 return obj != nullptr && is_subclass(obj->klass());
2087 }
2088
2089 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2090 oop thread = vthread->obj_field(_carrierThread_offset);
2091 return thread;
2092 }
2093
2094 oop java_lang_VirtualThread::continuation(oop vthread) {
2095 oop cont = vthread->obj_field(_continuation_offset);
2096 return cont;
2097 }
2098
2099 int java_lang_VirtualThread::state(oop vthread) {
2100 return vthread->int_field_acquire(_state_offset);
2101 }
2102
2103 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2104 vthread->release_int_field_put(_state_offset, state);
2105 }
2106
2107 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2108 jint* addr = vthread->field_addr<jint>(_state_offset);
2109 int res = Atomic::cmpxchg(addr, old_state, new_state);
2110 return res;
2111 }
2112
2113 oop java_lang_VirtualThread::next(oop vthread) {
2114 return vthread->obj_field(_next_offset);
2115 }
2116
2117 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2118 vthread->obj_field_put(_next_offset, next_vthread);
2119 }
2120
2121 // Add vthread to the waiting list if it's not already in it. Multiple threads
2122 // could be trying to add vthread to the list at the same time, so we control
2123 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2124 // Method returns true if we added vthread to the list, false otherwise.
2125 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2126 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2127 jboolean vthread_on_list = Atomic::load(addr);
2128 if (!vthread_on_list) {
2129 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2130 if (!vthread_on_list) {
2131 for (;;) {
2132 oop head = list_head.resolve();
2133 java_lang_VirtualThread::set_next(vthread, head);
2134 if (list_head.cmpxchg(head, vthread) == head) return true;
2135 }
2136 }
2137 }
2138 return false; // already on waiting list
2139 }
2140
2141 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2142 vthread->bool_field_put_volatile(_notified_offset, value);
2143 }
2144
2145 jlong java_lang_VirtualThread::timeout(oop vthread) {
2146 return vthread->long_field(_timeout_offset);
2147 }
2148
2149 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2150 vthread->long_field_put(_timeout_offset, value);
2151 }
2152
2153 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2154 JavaThreadStatus status = JavaThreadStatus::NEW;
2155 switch (state & ~SUSPENDED) {
2156 case NEW:
2157 status = JavaThreadStatus::NEW;
2158 break;
2159 case STARTED:
2160 case RUNNING:
2161 case PARKING:
2162 case TIMED_PARKING:
2163 case UNPARKED:
2164 case YIELDING:
2165 case YIELDED:
2166 case UNBLOCKED:
2167 case WAITING:
2168 case TIMED_WAITING:
2169 status = JavaThreadStatus::RUNNABLE;
2170 break;
2171 case PARKED:
2172 case PINNED:
2173 status = JavaThreadStatus::PARKED;
2174 break;
2175 case TIMED_PARKED:
2176 case TIMED_PINNED:
2177 status = JavaThreadStatus::PARKED_TIMED;
2178 break;
2179 case BLOCKING:
2180 case BLOCKED:
2181 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2182 break;
2183 case WAIT:
2184 status = JavaThreadStatus::IN_OBJECT_WAIT;
2185 break;
2186 case TIMED_WAIT:
2187 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2188 break;
2189 case TERMINATED:
2190 status = JavaThreadStatus::TERMINATED;
2191 break;
2192 default:
2193 ShouldNotReachHere();
2194 }
2195 return status;
2196 }
2197
2198 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2199 oop continuation = java_lang_VirtualThread::continuation(vthread);
2200 assert(continuation != nullptr, "vthread with no continuation");
2201 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2202 return chunk != nullptr && chunk->preempted();
2203 }
2204
2205 #if INCLUDE_CDS
2206 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2207 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2208 }
2209 #endif
2210
2211 // java_lang_Throwable
2212
2213 int java_lang_Throwable::_backtrace_offset;
2214 int java_lang_Throwable::_detailMessage_offset;
2215 int java_lang_Throwable::_stackTrace_offset;
2216 int java_lang_Throwable::_depth_offset;
2217 int java_lang_Throwable::_cause_offset;
2218 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2219
2220 #define THROWABLE_FIELDS_DO(macro) \
2221 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2222 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2223 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2224 macro(_depth_offset, k, "depth", int_signature, false); \
2225 macro(_cause_offset, k, "cause", throwable_signature, false); \
2226 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2227
2228 void java_lang_Throwable::compute_offsets() {
2229 InstanceKlass* k = vmClasses::Throwable_klass();
2230 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2231 }
2232
2233 #if INCLUDE_CDS
2234 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2235 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2236 }
2237 #endif
2238
2239 oop java_lang_Throwable::unassigned_stacktrace() {
2240 InstanceKlass* ik = vmClasses::Throwable_klass();
2241 oop base = ik->static_field_base_raw();
2242 return base->obj_field(_static_unassigned_stacktrace_offset);
2243 }
2244
2245 oop java_lang_Throwable::backtrace(oop throwable) {
2246 return throwable->obj_field_acquire(_backtrace_offset);
2247 }
2248
2249
2250 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2251 throwable->release_obj_field_put(_backtrace_offset, value);
2252 }
2253
2254 int java_lang_Throwable::depth(oop throwable) {
2255 return throwable->int_field(_depth_offset);
2256 }
2257
2258 void java_lang_Throwable::set_depth(oop throwable, int value) {
2259 throwable->int_field_put(_depth_offset, value);
2260 }
2261
2262 oop java_lang_Throwable::message(oop throwable) {
2263 return throwable->obj_field(_detailMessage_offset);
2264 }
2265
2266 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2267 oop msg = java_lang_Throwable::message(throwable);
2268 const char* msg_utf8 = nullptr;
2269 if (msg != nullptr) {
2270 msg_utf8 = java_lang_String::as_utf8_string(msg);
2271 }
2272 return msg_utf8;
2273 }
2274
2275 oop java_lang_Throwable::cause(oop throwable) {
2276 return throwable->obj_field(_cause_offset);
2277 }
2278
2279 void java_lang_Throwable::set_message(oop throwable, oop value) {
2280 throwable->obj_field_put(_detailMessage_offset, value);
2281 }
2282
2283
2284 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2285 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2286 }
2287
2288 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2289 set_stacktrace(throwable, nullptr);
2290 }
2291
2292 oop java_lang_Throwable::create_exception_instance(Symbol* class_name, TRAPS) {
2293 Klass* k = SystemDictionary::resolve_or_fail(class_name, true, CHECK_NULL);
2294 return InstanceKlass::cast(k)->allocate_instance(CHECK_NULL);
2295 }
2296
2297 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2298 ResourceMark rm;
2299 Klass* k = throwable->klass();
2300 assert(k != nullptr, "just checking");
2301 st->print("%s", k->external_name());
2302 oop msg = message(throwable);
2303 if (msg != nullptr) {
2304 st->print(": %s", java_lang_String::as_utf8_string(msg));
2305 }
2306 }
2307
2308 // After this many redefines, the stack trace is unreliable.
2309 const int MAX_VERSION = USHRT_MAX;
2310
2311 static inline bool version_matches(Method* method, int version) {
2312 assert(version < MAX_VERSION, "version is too big");
2313 return method != nullptr && (method->constants()->version() == version);
2314 }
2315
2316 // This class provides a simple wrapper over the internal structure of
2317 // exception backtrace to insulate users of the backtrace from needing
2318 // to know what it looks like.
2319 // The code of this class is not GC safe. Allocations can only happen
2320 // in expand().
2321 class BacktraceBuilder: public StackObj {
2322 friend class BacktraceIterator;
2323 private:
2324 Handle _backtrace;
2325 objArrayOop _head;
2326 typeArrayOop _methods;
2327 typeArrayOop _bcis;
2328 objArrayOop _mirrors;
2329 typeArrayOop _names; // Needed to insulate method name against redefinition.
2330 // True if the top frame of the backtrace is omitted because it shall be hidden.
2331 bool _has_hidden_top_frame;
2332 int _index;
2333 NoSafepointVerifier _nsv;
2334
2335 enum {
2336 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2337 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2338 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2339 trace_names_offset = java_lang_Throwable::trace_names_offset,
2340 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2341 trace_next_offset = java_lang_Throwable::trace_next_offset,
2342 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2343 trace_size = java_lang_Throwable::trace_size,
2344 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2345 };
2346
2347 // get info out of chunks
2348 static typeArrayOop get_methods(objArrayHandle chunk) {
2349 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2350 assert(methods != nullptr, "method array should be initialized in backtrace");
2351 return methods;
2352 }
2353 static typeArrayOop get_bcis(objArrayHandle chunk) {
2354 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2355 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2356 return bcis;
2357 }
2358 static objArrayOop get_mirrors(objArrayHandle chunk) {
2359 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2360 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2361 return mirrors;
2362 }
2363 static typeArrayOop get_names(objArrayHandle chunk) {
2364 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2365 assert(names != nullptr, "names array should be initialized in backtrace");
2366 return names;
2367 }
2368 static bool has_hidden_top_frame(objArrayHandle chunk) {
2369 oop hidden = chunk->obj_at(trace_hidden_offset);
2370 return hidden != nullptr;
2371 }
2372
2373 public:
2374
2375 // constructor for new backtrace
2376 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2377 expand(CHECK);
2378 _backtrace = Handle(THREAD, _head);
2379 _index = 0;
2380 }
2381
2382 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2383 _methods = get_methods(backtrace);
2384 _bcis = get_bcis(backtrace);
2385 _mirrors = get_mirrors(backtrace);
2386 _names = get_names(backtrace);
2387 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2388 assert(_methods->length() == _bcis->length() &&
2389 _methods->length() == _mirrors->length() &&
2390 _mirrors->length() == _names->length(),
2391 "method and source information arrays should match");
2392
2393 // head is the preallocated backtrace
2394 _head = backtrace();
2395 _backtrace = Handle(thread, _head);
2396 _index = 0;
2397 }
2398
2399 void expand(TRAPS) {
2400 objArrayHandle old_head(THREAD, _head);
2401 PauseNoSafepointVerifier pnsv(&_nsv);
2402
2403 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2404 objArrayHandle new_head(THREAD, head);
2405
2406 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2407 typeArrayHandle new_methods(THREAD, methods);
2408
2409 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2410 typeArrayHandle new_bcis(THREAD, bcis);
2411
2412 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2413 objArrayHandle new_mirrors(THREAD, mirrors);
2414
2415 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2416 typeArrayHandle new_names(THREAD, names);
2417
2418 if (!old_head.is_null()) {
2419 old_head->obj_at_put(trace_next_offset, new_head());
2420 }
2421 new_head->obj_at_put(trace_methods_offset, new_methods());
2422 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2423 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2424 new_head->obj_at_put(trace_names_offset, new_names());
2425 new_head->obj_at_put(trace_hidden_offset, nullptr);
2426
2427 _head = new_head();
2428 _methods = new_methods();
2429 _bcis = new_bcis();
2430 _mirrors = new_mirrors();
2431 _names = new_names();
2432 _index = 0;
2433 }
2434
2435 oop backtrace() {
2436 return _backtrace();
2437 }
2438
2439 inline void push(Method* method, int bci, TRAPS) {
2440 // Smear the -1 bci to 0 since the array only holds unsigned
2441 // shorts. The later line number lookup would just smear the -1
2442 // to a 0 even if it could be recorded.
2443 if (bci == SynchronizationEntryBCI) bci = 0;
2444
2445 if (_index >= trace_chunk_size) {
2446 methodHandle mhandle(THREAD, method);
2447 expand(CHECK);
2448 method = mhandle();
2449 }
2450
2451 _methods->ushort_at_put(_index, method->orig_method_idnum());
2452 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2453
2454 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2455 // klass owning the symbols alive so their refcounts aren't decremented.
2456 Symbol* name = method->name();
2457 _names->symbol_at_put(_index, name);
2458
2459 // We need to save the mirrors in the backtrace to keep the class
2460 // from being unloaded while we still have this stack trace.
2461 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2462 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2463
2464 _index++;
2465 }
2466
2467 void set_has_hidden_top_frame() {
2468 if (!_has_hidden_top_frame) {
2469 // It would be nice to add java/lang/Boolean::TRUE here
2470 // to indicate that this backtrace has a hidden top frame.
2471 // But this code is used before TRUE is allocated.
2472 // Therefore let's just use an arbitrary legal oop
2473 // available right here. _methods is a short[].
2474 assert(_methods != nullptr, "we need a legal oop");
2475 _has_hidden_top_frame = true;
2476 _head->obj_at_put(trace_hidden_offset, _methods);
2477 }
2478 }
2479 };
2480
2481 struct BacktraceElement : public StackObj {
2482 int _method_id;
2483 int _bci;
2484 int _version;
2485 Symbol* _name;
2486 Handle _mirror;
2487 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2488 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2489 };
2490
2491 class BacktraceIterator : public StackObj {
2492 int _index;
2493 objArrayHandle _result;
2494 objArrayHandle _mirrors;
2495 typeArrayHandle _methods;
2496 typeArrayHandle _bcis;
2497 typeArrayHandle _names;
2498
2499 void init(objArrayHandle result, Thread* thread) {
2500 // Get method id, bci, version and mirror from chunk
2501 _result = result;
2502 if (_result.not_null()) {
2503 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2504 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2505 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2506 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2507 _index = 0;
2508 }
2509 }
2510 public:
2511 BacktraceIterator(objArrayHandle result, Thread* thread) {
2512 init(result, thread);
2513 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2514 }
2515
2516 BacktraceElement next(Thread* thread) {
2517 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2518 _methods->ushort_at(_index),
2519 Backtrace::version_at(_bcis->int_at(_index)),
2520 Backtrace::bci_at(_bcis->int_at(_index)),
2521 _names->symbol_at(_index));
2522 _index++;
2523
2524 if (_index >= java_lang_Throwable::trace_chunk_size) {
2525 int next_offset = java_lang_Throwable::trace_next_offset;
2526 // Get next chunk
2527 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2528 init(result, thread);
2529 }
2530 return e;
2531 }
2532
2533 bool repeat() {
2534 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2535 }
2536 };
2537
2538
2539 // Print stack trace element to resource allocated buffer
2540 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2541 int version, int bci, Symbol* name) {
2542 ResourceMark rm;
2543
2544 // Get strings and string lengths
2545 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2546 const char* klass_name = holder->external_name();
2547 int buf_len = (int)strlen(klass_name);
2548
2549 char* method_name = name->as_C_string();
2550 buf_len += (int)strlen(method_name);
2551
2552 char* source_file_name = nullptr;
2553 Symbol* source = Backtrace::get_source_file_name(holder, version);
2554 if (source != nullptr) {
2555 source_file_name = source->as_C_string();
2556 buf_len += (int)strlen(source_file_name);
2557 }
2558
2559 char *module_name = nullptr, *module_version = nullptr;
2560 ModuleEntry* module = holder->module();
2561 if (module->is_named()) {
2562 module_name = module->name()->as_C_string();
2563 buf_len += (int)strlen(module_name);
2564 if (module->version() != nullptr) {
2565 module_version = module->version()->as_C_string();
2566 buf_len += (int)strlen(module_version);
2567 }
2568 }
2569
2570 // Allocate temporary buffer with extra space for formatting and line number
2571 const size_t buf_size = buf_len + 64;
2572 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2573
2574 // Print stack trace line in buffer
2575 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2576
2577 // Print module information
2578 if (module_name != nullptr) {
2579 if (module_version != nullptr) {
2580 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2581 } else {
2582 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2583 }
2584 }
2585
2586 // The method can be null if the requested class version is gone
2587 Method* method = holder->method_with_orig_idnum(method_id, version);
2588 if (!version_matches(method, version)) {
2589 strcat(buf, "Redefined)");
2590 } else {
2591 int line_number = Backtrace::get_line_number(method, bci);
2592 if (line_number == -2) {
2593 strcat(buf, "Native Method)");
2594 } else {
2595 if (source_file_name != nullptr && (line_number != -1)) {
2596 // Sourcename and linenumber
2597 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2598 } else if (source_file_name != nullptr) {
2599 // Just sourcename
2600 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2601 } else {
2602 // Neither sourcename nor linenumber
2603 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2604 }
2605 nmethod* nm = method->code();
2606 if (WizardMode && nm != nullptr) {
2607 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2608 }
2609 }
2610 }
2611
2612 st->print_cr("%s", buf);
2613 }
2614
2615 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2616 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2617 int method_id = method->orig_method_idnum();
2618 int version = method->constants()->version();
2619 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2620 }
2621
2622 /**
2623 * Print the throwable message and its stack trace plus all causes by walking the
2624 * cause chain. The output looks the same as of Throwable.printStackTrace().
2625 */
2626 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2627 // First, print the message.
2628 print(throwable(), st);
2629 st->cr();
2630
2631 // Now print the stack trace.
2632 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2633 while (throwable.not_null()) {
2634 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2635 if (result.is_null()) {
2636 st->print_raw_cr("\t<<no stack trace available>>");
2637 return;
2638 }
2639 BacktraceIterator iter(result, THREAD);
2640
2641 while (iter.repeat()) {
2642 BacktraceElement bte = iter.next(THREAD);
2643 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2644 }
2645 if (THREAD->can_call_java()) {
2646 // Call getCause() which doesn't necessarily return the _cause field.
2647 ExceptionMark em(THREAD);
2648 JavaValue cause(T_OBJECT);
2649 JavaCalls::call_virtual(&cause,
2650 throwable,
2651 throwable->klass(),
2652 vmSymbols::getCause_name(),
2653 vmSymbols::void_throwable_signature(),
2654 THREAD);
2655 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2656 if (HAS_PENDING_EXCEPTION) {
2657 CLEAR_PENDING_EXCEPTION;
2658 throwable = Handle();
2659 } else {
2660 throwable = Handle(THREAD, cause.get_oop());
2661 if (throwable.not_null()) {
2662 st->print("Caused by: ");
2663 print(throwable(), st);
2664 st->cr();
2665 }
2666 }
2667 } else {
2668 st->print_raw_cr("<<cannot call Java to get cause>>");
2669 return;
2670 }
2671 }
2672 }
2673
2674 /**
2675 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2676 */
2677 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2678 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2679 JavaValue result(T_VOID);
2680 JavaCalls::call_virtual(&result,
2681 throwable,
2682 vmClasses::Throwable_klass(),
2683 vmSymbols::printStackTrace_name(),
2684 vmSymbols::void_method_signature(),
2685 THREAD);
2686 }
2687
2688 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2689 if (!StackTraceInThrowable) return;
2690 ResourceMark rm(THREAD);
2691
2692 // Start out by clearing the backtrace for this object, in case the VM
2693 // runs out of memory while allocating the stack trace
2694 set_backtrace(throwable(), nullptr);
2695 // Clear lazily constructed Java level stacktrace if refilling occurs
2696 // This is unnecessary in 1.7+ but harmless
2697 clear_stacktrace(throwable());
2698
2699 int max_depth = MaxJavaStackTraceDepth;
2700 JavaThread* thread = THREAD;
2701
2702 BacktraceBuilder bt(CHECK);
2703
2704 // If there is no Java frame just return the method that was being called
2705 // with bci 0
2706 if (!thread->has_last_Java_frame()) {
2707 if (max_depth >= 1 && method() != nullptr) {
2708 bt.push(method(), 0, CHECK);
2709 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2710 set_depth(throwable(), 1);
2711 set_backtrace(throwable(), bt.backtrace());
2712 }
2713 return;
2714 }
2715
2716 // Instead of using vframe directly, this version of fill_in_stack_trace
2717 // basically handles everything by hand. This significantly improved the
2718 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2719 // See bug 6333838 for more details.
2720 // The "ASSERT" here is to verify this method generates the exactly same stack
2721 // trace as utilizing vframe.
2722 #ifdef ASSERT
2723 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2724 #endif
2725 int total_count = 0;
2726 RegisterMap map(thread,
2727 RegisterMap::UpdateMap::skip,
2728 RegisterMap::ProcessFrames::skip,
2729 RegisterMap::WalkContinuation::include);
2730 int decode_offset = 0;
2731 nmethod* nm = nullptr;
2732 bool skip_fillInStackTrace_check = false;
2733 bool skip_throwableInit_check = false;
2734 bool skip_hidden = !ShowHiddenFrames;
2735 bool show_carrier = ShowCarrierFrames;
2736 ContinuationEntry* cont_entry = thread->last_continuation();
2737 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2738 Method* method = nullptr;
2739 int bci = 0;
2740
2741 // Compiled java method case.
2742 if (decode_offset != 0) {
2743 DebugInfoReadStream stream(nm, decode_offset);
2744 decode_offset = stream.read_int();
2745 method = (Method*)nm->metadata_at(stream.read_int());
2746 bci = stream.read_bci();
2747 } else {
2748 if (fr.is_first_frame()) break;
2749
2750 if (Continuation::is_continuation_enterSpecial(fr)) {
2751 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2752 if (!show_carrier && cont_entry->is_virtual_thread()) {
2753 break;
2754 }
2755 cont_entry = cont_entry->parent();
2756 }
2757
2758 address pc = fr.pc();
2759 if (fr.is_interpreted_frame()) {
2760 address bcp;
2761 if (!map.in_cont()) {
2762 bcp = fr.interpreter_frame_bcp();
2763 method = fr.interpreter_frame_method();
2764 } else {
2765 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2766 method = map.stack_chunk()->interpreter_frame_method(fr);
2767 }
2768 bci = method->bci_from(bcp);
2769 fr = fr.sender(&map);
2770 } else {
2771 CodeBlob* cb = fr.cb();
2772 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2773 // but non nmethod
2774 fr = fr.sender(&map);
2775 if (cb == nullptr || !cb->is_nmethod()) {
2776 continue;
2777 }
2778 nm = cb->as_nmethod();
2779 assert(nm->method() != nullptr, "must be");
2780 if (nm->method()->is_native()) {
2781 method = nm->method();
2782 bci = 0;
2783 } else {
2784 PcDesc* pd = nm->pc_desc_at(pc);
2785 decode_offset = pd->scope_decode_offset();
2786 // if decode_offset is not equal to 0, it will execute the
2787 // "compiled java method case" at the beginning of the loop.
2788 continue;
2789 }
2790 }
2791 }
2792 #ifdef ASSERT
2793 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2794 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2795 st.next();
2796 }
2797 #endif
2798
2799 // the format of the stacktrace will be:
2800 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2801 // - 0 or more <init> methods for the exception class (skipped)
2802 // - rest of the stack
2803
2804 if (!skip_fillInStackTrace_check) {
2805 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2806 throwable->is_a(method->method_holder())) {
2807 continue;
2808 }
2809 else {
2810 skip_fillInStackTrace_check = true; // gone past them all
2811 }
2812 }
2813 if (!skip_throwableInit_check) {
2814 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2815
2816 // skip <init> methods of the exception class and superclasses
2817 // This is similar to classic VM.
2818 if (method->name() == vmSymbols::object_initializer_name() &&
2819 throwable->is_a(method->method_holder())) {
2820 continue;
2821 } else {
2822 // there are none or we've seen them all - either way stop checking
2823 skip_throwableInit_check = true;
2824 }
2825 }
2826 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2827 if (skip_hidden) {
2828 if (total_count == 0) {
2829 // The top frame will be hidden from the stack trace.
2830 bt.set_has_hidden_top_frame();
2831 }
2832 continue;
2833 }
2834 }
2835
2836 bt.push(method, bci, CHECK);
2837 total_count++;
2838 }
2839
2840 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2841
2842 // Put completed stack trace into throwable object
2843 set_backtrace(throwable(), bt.backtrace());
2844 set_depth(throwable(), total_count);
2845 }
2846
2847 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2848 // No-op if stack trace is disabled
2849 if (!StackTraceInThrowable) {
2850 return;
2851 }
2852
2853 // Disable stack traces for some preallocated out of memory errors
2854 if (!Universe::should_fill_in_stack_trace(throwable)) {
2855 return;
2856 }
2857
2858 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2859 PreserveExceptionMark pm(THREAD);
2860
2861 fill_in_stack_trace(throwable, method, THREAD);
2862 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2863 // original exception via the PreserveExceptionMark destructor.
2864 CLEAR_PENDING_EXCEPTION;
2865 }
2866
2867 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2868 // Allocate stack trace - backtrace is created but not filled in
2869
2870 // No-op if stack trace is disabled
2871 if (!StackTraceInThrowable) return;
2872 BacktraceBuilder bt(CHECK); // creates a backtrace
2873 set_backtrace(throwable(), bt.backtrace());
2874 }
2875
2876
2877 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2878 // Fill in stack trace into preallocated backtrace (no GC)
2879
2880 // No-op if stack trace is disabled
2881 if (!StackTraceInThrowable) return;
2882
2883 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2884
2885 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2886
2887 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2888 assert(backtrace.not_null(), "backtrace should have been preallocated");
2889
2890 ResourceMark rm(THREAD);
2891 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2892
2893 BacktraceBuilder bt(THREAD, backtrace);
2894
2895 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2896 // methods as preallocated errors aren't created by "java" code.
2897
2898 // fill in as much stack trace as possible
2899 int chunk_count = 0;
2900 for (;!st.at_end(); st.next()) {
2901 bt.push(st.method(), st.bci(), CHECK);
2902 chunk_count++;
2903
2904 // Bail-out for deep stacks
2905 if (chunk_count >= trace_chunk_size) break;
2906 }
2907 set_depth(throwable(), chunk_count);
2908 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2909
2910 // We support the Throwable immutability protocol defined for Java 7.
2911 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2912 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2913 }
2914
2915 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2916 objArrayHandle stack_trace_array_h, TRAPS) {
2917
2918 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2919 THROW(vmSymbols::java_lang_NullPointerException());
2920 }
2921
2922 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2923
2924 if (stack_trace_array_h->length() != depth) {
2925 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2926 }
2927
2928 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2929 BacktraceIterator iter(result, THREAD);
2930
2931 int index = 0;
2932 while (iter.repeat()) {
2933 BacktraceElement bte = iter.next(THREAD);
2934
2935 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2936
2937 if (stack_trace_element.is_null()) {
2938 THROW(vmSymbols::java_lang_NullPointerException());
2939 }
2940
2941 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2942 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2943
2944 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2945 method,
2946 bte._version,
2947 bte._bci,
2948 bte._name,
2949 CHECK);
2950 }
2951 }
2952
2953 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2954 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2955 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2956 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2957 // symbolic stacktrace of 'throwable'.
2958 assert(throwable.not_null(), "shouldn't be");
2959
2960 // Now create the message from the original exception and thread name.
2961 ResourceMark rm(current);
2962 const char *message = nullptr;
2963 oop detailed_message = java_lang_Throwable::message(throwable());
2964 if (detailed_message != nullptr) {
2965 message = java_lang_String::as_utf8_string(detailed_message);
2966 }
2967 stringStream st;
2968 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2969 message == nullptr ? "" : ":");
2970 if (message == nullptr) {
2971 st.print("[in thread \"%s\"]", current->name());
2972 } else {
2973 st.print("%s [in thread \"%s\"]", message, current->name());
2974 }
2975
2976 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2977 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2978 // If new_exception returns a different exception while creating the exception,
2979 // abandon the attempt to save the initialization error and return null.
2980 if (init_error->klass()->name() != exception_name) {
2981 log_info(class, init)("Exception %s thrown while saving initialization exception",
2982 init_error->klass()->external_name());
2983 return Handle();
2984 }
2985
2986 // Call to java to fill in the stack trace and clear declaringClassObject to
2987 // not keep classes alive in the stack trace.
2988 // call this: public StackTraceElement[] getStackTrace()
2989 JavaValue result(T_ARRAY);
2990 JavaCalls::call_virtual(&result, throwable,
2991 vmClasses::Throwable_klass(),
2992 vmSymbols::getStackTrace_name(),
2993 vmSymbols::getStackTrace_signature(),
2994 current);
2995 if (!current->has_pending_exception()){
2996 Handle stack_trace(current, result.get_oop());
2997 assert(stack_trace->is_objArray(), "Should be an array");
2998 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2999 // Clear backtrace because the stacktrace should be used instead.
3000 set_backtrace(init_error(), nullptr);
3001 } else {
3002 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3003 init_error->klass()->external_name());
3004 current->clear_pending_exception();
3005 }
3006
3007 return init_error;
3008 }
3009
3010 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3011 JavaThread* current = JavaThread::current();
3012 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3013 BacktraceIterator iter(result, current);
3014 // No backtrace available.
3015 if (!iter.repeat()) return false;
3016
3017 // If the exception happened in a frame that has been hidden, i.e.,
3018 // omitted from the back trace, we can not compute the message.
3019 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3020 if (hidden != nullptr) {
3021 return false;
3022 }
3023
3024 // Get first backtrace element.
3025 BacktraceElement bte = iter.next(current);
3026
3027 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3028 assert(holder != nullptr, "first element should be non-null");
3029 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3030
3031 // Original version is no longer available.
3032 if (m == nullptr || !version_matches(m, bte._version)) {
3033 return false;
3034 }
3035
3036 *method = m;
3037 *bci = bte._bci;
3038 return true;
3039 }
3040
3041 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3042 // Allocate java.lang.StackTraceElement instance
3043 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3044 assert(k != nullptr, "must be loaded in 1.4+");
3045 if (k->should_be_initialized()) {
3046 k->initialize(CHECK_NULL);
3047 }
3048
3049 Handle element = k->allocate_instance_handle(CHECK_NULL);
3050
3051 int version = method->constants()->version();
3052 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3053 return element();
3054 }
3055
3056 void java_lang_StackTraceElement::fill_in(Handle element,
3057 InstanceKlass* holder, const methodHandle& method,
3058 int version, int bci, Symbol* name, TRAPS) {
3059 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3060
3061 ResourceMark rm(THREAD);
3062 HandleMark hm(THREAD);
3063
3064 // Fill in class name
3065 Handle java_class(THREAD, holder->java_mirror());
3066 oop classname = java_lang_Class::name(java_class, CHECK);
3067 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3068 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3069
3070 oop loader = holder->class_loader();
3071 if (loader != nullptr) {
3072 oop loader_name = java_lang_ClassLoader::name(loader);
3073 if (loader_name != nullptr)
3074 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3075 }
3076
3077 // Fill in method name
3078 oop methodname = StringTable::intern(name, CHECK);
3079 java_lang_StackTraceElement::set_methodName(element(), methodname);
3080
3081 // Fill in module name and version
3082 ModuleEntry* module = holder->module();
3083 if (module->is_named()) {
3084 oop module_name = StringTable::intern(module->name(), CHECK);
3085 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3086 oop module_version;
3087 if (module->version() != nullptr) {
3088 module_version = StringTable::intern(module->version(), CHECK);
3089 } else {
3090 module_version = nullptr;
3091 }
3092 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3093 }
3094
3095 if (method() == nullptr || !version_matches(method(), version)) {
3096 // The method was redefined, accurate line number information isn't available
3097 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3098 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3099 } else {
3100 Symbol* source;
3101 oop source_file;
3102 int line_number;
3103 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3104
3105 java_lang_StackTraceElement::set_fileName(element(), source_file);
3106 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3107 }
3108 }
3109
3110 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3111 InstanceKlass* holder,
3112 int version,
3113 const methodHandle& method,
3114 int bci,
3115 Symbol*& source,
3116 oop& source_file,
3117 int& line_number, TRAPS) {
3118 // Fill in source file name and line number.
3119 source = Backtrace::get_source_file_name(holder, version);
3120 source_file = java_lang_Class::source_file(java_class());
3121 if (source != nullptr) {
3122 // Class was not redefined. We can trust its cache if set,
3123 // else we have to initialize it.
3124 if (source_file == nullptr) {
3125 source_file = StringTable::intern(source, CHECK);
3126 java_lang_Class::set_source_file(java_class(), source_file);
3127 }
3128 } else {
3129 // Class was redefined. Dump the cache if it was set.
3130 if (source_file != nullptr) {
3131 source_file = nullptr;
3132 java_lang_Class::set_source_file(java_class(), source_file);
3133 }
3134 }
3135 line_number = Backtrace::get_line_number(method(), bci);
3136 }
3137
3138 #if INCLUDE_JVMCI
3139 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3140 Symbol*& filename, int& line_number, TRAPS) {
3141 ResourceMark rm(THREAD);
3142 HandleMark hm(THREAD);
3143
3144 filename = nullptr;
3145 line_number = -1;
3146
3147 oop source_file;
3148 int version = method->constants()->version();
3149 InstanceKlass* holder = method->method_holder();
3150 Handle java_class(THREAD, holder->java_mirror());
3151 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3152 }
3153 #endif // INCLUDE_JVMCI
3154
3155 // java_lang_ClassFrameInfo
3156
3157 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3158 int java_lang_ClassFrameInfo::_flags_offset;
3159
3160 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3161 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3162 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3163
3164 void java_lang_ClassFrameInfo::compute_offsets() {
3165 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3166 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3167 }
3168
3169 #if INCLUDE_CDS
3170 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3171 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3172 }
3173 #endif
3174
3175 static int get_flags(const methodHandle& m) {
3176 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS );
3177 if (m->is_object_initializer()) {
3178 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3179 } else {
3180 // Note: Static initializers can be here. Record them as plain methods.
3181 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3182 }
3183 if (m->caller_sensitive()) {
3184 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3185 }
3186 if (m->is_hidden()) {
3187 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3188 }
3189 assert((flags & 0xFF000000) == 0, "unexpected flags");
3190 return flags;
3191 }
3192
3193 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3194 return obj->obj_field(_classOrMemberName_offset);
3195 }
3196
3197 int java_lang_ClassFrameInfo::flags(oop obj) {
3198 return obj->int_field(_flags_offset);
3199 }
3200
3201 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3202 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3203 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3204 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3205 stackFrame->int_field_put(_flags_offset, flags);
3206 }
3207
3208 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3209 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3210 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3211 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3212 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3213 stackFrame->int_field_put(_flags_offset, flags);
3214 }
3215
3216
3217 // java_lang_StackFrameInfo
3218
3219 int java_lang_StackFrameInfo::_type_offset;
3220 int java_lang_StackFrameInfo::_name_offset;
3221 int java_lang_StackFrameInfo::_bci_offset;
3222 int java_lang_StackFrameInfo::_version_offset;
3223 int java_lang_StackFrameInfo::_contScope_offset;
3224
3225 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3226 macro(_type_offset, k, "type", object_signature, false); \
3227 macro(_name_offset, k, "name", string_signature, false); \
3228 macro(_bci_offset, k, "bci", int_signature, false); \
3229 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3230
3231 void java_lang_StackFrameInfo::compute_offsets() {
3232 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3233 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3234 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3235 }
3236
3237 #if INCLUDE_CDS
3238 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3239 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3240 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3241 }
3242 #endif
3243
3244 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3245 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3246 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3247 return method;
3248 }
3249
3250 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3251 // set Method* or mid/cpref
3252 HandleMark hm(THREAD);
3253 Handle cont_h(THREAD, cont);
3254 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3255
3256 // set bci
3257 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3258 // method may be redefined; store the version
3259 int version = method->constants()->version();
3260 assert((jushort)version == version, "version should be short");
3261 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3262
3263 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3264 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3265 }
3266
3267 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3268 ResourceMark rm(THREAD);
3269 HandleMark hm(THREAD);
3270
3271 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3272 InstanceKlass* holder = method->method_holder();
3273 short version = stackFrame->short_field(_version_offset);
3274 int bci = stackFrame->int_field(_bci_offset);
3275 Symbol* name = method->name();
3276 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3277 }
3278
3279 oop java_lang_StackFrameInfo::type(oop obj) {
3280 return obj->obj_field(_type_offset);
3281 }
3282
3283 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3284 obj->obj_field_put(_type_offset, value);
3285 }
3286
3287 oop java_lang_StackFrameInfo::name(oop obj) {
3288 return obj->obj_field(_name_offset);
3289 }
3290
3291 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3292 obj->obj_field_put(_name_offset, value);
3293 }
3294
3295 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3296 obj->short_field_put(_version_offset, value);
3297 }
3298
3299 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3300 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3301 obj->int_field_put(_bci_offset, value);
3302 }
3303
3304 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3305 obj->obj_field_put(_contScope_offset, value);
3306 }
3307
3308 int java_lang_LiveStackFrameInfo::_monitors_offset;
3309 int java_lang_LiveStackFrameInfo::_locals_offset;
3310 int java_lang_LiveStackFrameInfo::_operands_offset;
3311 int java_lang_LiveStackFrameInfo::_mode_offset;
3312
3313 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3314 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3315 macro(_locals_offset, k, "locals", object_array_signature, false); \
3316 macro(_operands_offset, k, "operands", object_array_signature, false); \
3317 macro(_mode_offset, k, "mode", int_signature, false)
3318
3319 void java_lang_LiveStackFrameInfo::compute_offsets() {
3320 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3321 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3322 }
3323
3324 #if INCLUDE_CDS
3325 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3326 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3327 }
3328 #endif
3329
3330 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3331 obj->obj_field_put(_monitors_offset, value);
3332 }
3333
3334 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3335 obj->obj_field_put(_locals_offset, value);
3336 }
3337
3338 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3339 obj->obj_field_put(_operands_offset, value);
3340 }
3341
3342 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3343 obj->int_field_put(_mode_offset, value);
3344 }
3345
3346
3347 // java_lang_AccessibleObject
3348
3349 int java_lang_reflect_AccessibleObject::_override_offset;
3350
3351 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3352 macro(_override_offset, k, "override", bool_signature, false)
3353
3354 void java_lang_reflect_AccessibleObject::compute_offsets() {
3355 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3356 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3357 }
3358
3359 #if INCLUDE_CDS
3360 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3361 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3362 }
3363 #endif
3364
3365 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3366 return (jboolean) reflect->bool_field(_override_offset);
3367 }
3368
3369 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3370 reflect->bool_field_put(_override_offset, (int) value);
3371 }
3372
3373 // java_lang_reflect_Method
3374
3375 int java_lang_reflect_Method::_clazz_offset;
3376 int java_lang_reflect_Method::_name_offset;
3377 int java_lang_reflect_Method::_returnType_offset;
3378 int java_lang_reflect_Method::_parameterTypes_offset;
3379 int java_lang_reflect_Method::_exceptionTypes_offset;
3380 int java_lang_reflect_Method::_slot_offset;
3381 int java_lang_reflect_Method::_modifiers_offset;
3382 int java_lang_reflect_Method::_signature_offset;
3383 int java_lang_reflect_Method::_annotations_offset;
3384 int java_lang_reflect_Method::_parameter_annotations_offset;
3385 int java_lang_reflect_Method::_annotation_default_offset;
3386
3387 #define METHOD_FIELDS_DO(macro) \
3388 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3389 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3390 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3391 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3392 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3393 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3394 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3395 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3396 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3397 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3398 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3399
3400 void java_lang_reflect_Method::compute_offsets() {
3401 InstanceKlass* k = vmClasses::reflect_Method_klass();
3402 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3403 }
3404
3405 #if INCLUDE_CDS
3406 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3407 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3408 }
3409 #endif
3410
3411 Handle java_lang_reflect_Method::create(TRAPS) {
3412 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3413 Klass* klass = vmClasses::reflect_Method_klass();
3414 // This class is eagerly initialized during VM initialization, since we keep a reference
3415 // to one of the methods
3416 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3417 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3418 }
3419
3420 oop java_lang_reflect_Method::clazz(oop reflect) {
3421 return reflect->obj_field(_clazz_offset);
3422 }
3423
3424 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3425 reflect->obj_field_put(_clazz_offset, value);
3426 }
3427
3428 int java_lang_reflect_Method::slot(oop reflect) {
3429 return reflect->int_field(_slot_offset);
3430 }
3431
3432 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3433 reflect->int_field_put(_slot_offset, value);
3434 }
3435
3436 void java_lang_reflect_Method::set_name(oop method, oop value) {
3437 method->obj_field_put(_name_offset, value);
3438 }
3439
3440 oop java_lang_reflect_Method::return_type(oop method) {
3441 return method->obj_field(_returnType_offset);
3442 }
3443
3444 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3445 method->obj_field_put(_returnType_offset, value);
3446 }
3447
3448 oop java_lang_reflect_Method::parameter_types(oop method) {
3449 return method->obj_field(_parameterTypes_offset);
3450 }
3451
3452 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3453 method->obj_field_put(_parameterTypes_offset, value);
3454 }
3455
3456 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3457 method->obj_field_put(_exceptionTypes_offset, value);
3458 }
3459
3460 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3461 method->int_field_put(_modifiers_offset, value);
3462 }
3463
3464 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3465 method->obj_field_put(_signature_offset, value);
3466 }
3467
3468 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3469 method->obj_field_put(_annotations_offset, value);
3470 }
3471
3472 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3473 method->obj_field_put(_parameter_annotations_offset, value);
3474 }
3475
3476 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3477 method->obj_field_put(_annotation_default_offset, value);
3478 }
3479
3480 int java_lang_reflect_Constructor::_clazz_offset;
3481 int java_lang_reflect_Constructor::_parameterTypes_offset;
3482 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3483 int java_lang_reflect_Constructor::_slot_offset;
3484 int java_lang_reflect_Constructor::_modifiers_offset;
3485 int java_lang_reflect_Constructor::_signature_offset;
3486 int java_lang_reflect_Constructor::_annotations_offset;
3487 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3488
3489 #define CONSTRUCTOR_FIELDS_DO(macro) \
3490 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3491 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3492 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3493 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3494 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3495 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3496 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3497 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3498
3499 void java_lang_reflect_Constructor::compute_offsets() {
3500 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3501 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3502 }
3503
3504 #if INCLUDE_CDS
3505 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3506 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3507 }
3508 #endif
3509
3510 Handle java_lang_reflect_Constructor::create(TRAPS) {
3511 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3512 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3513 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3514 InstanceKlass* ik = InstanceKlass::cast(k);
3515 // Ensure it is initialized
3516 ik->initialize(CHECK_NH);
3517 return ik->allocate_instance_handle(THREAD);
3518 }
3519
3520 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3521 return reflect->obj_field(_clazz_offset);
3522 }
3523
3524 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3525 reflect->obj_field_put(_clazz_offset, value);
3526 }
3527
3528 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3529 return constructor->obj_field(_parameterTypes_offset);
3530 }
3531
3532 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3533 constructor->obj_field_put(_parameterTypes_offset, value);
3534 }
3535
3536 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3537 constructor->obj_field_put(_exceptionTypes_offset, value);
3538 }
3539
3540 int java_lang_reflect_Constructor::slot(oop reflect) {
3541 return reflect->int_field(_slot_offset);
3542 }
3543
3544 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3545 reflect->int_field_put(_slot_offset, value);
3546 }
3547
3548 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3549 constructor->int_field_put(_modifiers_offset, value);
3550 }
3551
3552 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3553 constructor->obj_field_put(_signature_offset, value);
3554 }
3555
3556 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3557 constructor->obj_field_put(_annotations_offset, value);
3558 }
3559
3560 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3561 method->obj_field_put(_parameter_annotations_offset, value);
3562 }
3563
3564 int java_lang_reflect_Field::_clazz_offset;
3565 int java_lang_reflect_Field::_name_offset;
3566 int java_lang_reflect_Field::_type_offset;
3567 int java_lang_reflect_Field::_slot_offset;
3568 int java_lang_reflect_Field::_modifiers_offset;
3569 int java_lang_reflect_Field::_trusted_final_offset;
3570 int java_lang_reflect_Field::_signature_offset;
3571 int java_lang_reflect_Field::_annotations_offset;
3572
3573 #define FIELD_FIELDS_DO(macro) \
3574 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3575 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3576 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3577 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3578 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3579 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3580 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3581 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3582
3583 void java_lang_reflect_Field::compute_offsets() {
3584 InstanceKlass* k = vmClasses::reflect_Field_klass();
3585 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3586 }
3587
3588 #if INCLUDE_CDS
3589 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3590 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3591 }
3592 #endif
3593
3594 Handle java_lang_reflect_Field::create(TRAPS) {
3595 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3596 Symbol* name = vmSymbols::java_lang_reflect_Field();
3597 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3598 InstanceKlass* ik = InstanceKlass::cast(k);
3599 // Ensure it is initialized
3600 ik->initialize(CHECK_NH);
3601 return ik->allocate_instance_handle(THREAD);
3602 }
3603
3604 oop java_lang_reflect_Field::clazz(oop reflect) {
3605 return reflect->obj_field(_clazz_offset);
3606 }
3607
3608 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3609 reflect->obj_field_put(_clazz_offset, value);
3610 }
3611
3612 oop java_lang_reflect_Field::name(oop field) {
3613 return field->obj_field(_name_offset);
3614 }
3615
3616 void java_lang_reflect_Field::set_name(oop field, oop value) {
3617 field->obj_field_put(_name_offset, value);
3618 }
3619
3620 oop java_lang_reflect_Field::type(oop field) {
3621 return field->obj_field(_type_offset);
3622 }
3623
3624 void java_lang_reflect_Field::set_type(oop field, oop value) {
3625 field->obj_field_put(_type_offset, value);
3626 }
3627
3628 int java_lang_reflect_Field::slot(oop reflect) {
3629 return reflect->int_field(_slot_offset);
3630 }
3631
3632 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3633 reflect->int_field_put(_slot_offset, value);
3634 }
3635
3636 int java_lang_reflect_Field::modifiers(oop field) {
3637 return field->int_field(_modifiers_offset);
3638 }
3639
3640 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3641 field->int_field_put(_modifiers_offset, value);
3642 }
3643
3644 void java_lang_reflect_Field::set_trusted_final(oop field) {
3645 field->bool_field_put(_trusted_final_offset, true);
3646 }
3647
3648 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3649 field->obj_field_put(_signature_offset, value);
3650 }
3651
3652 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3653 field->obj_field_put(_annotations_offset, value);
3654 }
3655
3656 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3657 // Allocate java.lang.reflect.RecordComponent instance
3658 HandleMark hm(THREAD);
3659 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3660 assert(ik != nullptr, "must be loaded");
3661 ik->initialize(CHECK_NULL);
3662
3663 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3664
3665 Handle decl_class(THREAD, holder->java_mirror());
3666 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3667
3668 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3669 oop component_name = StringTable::intern(name, CHECK_NULL);
3670 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3671
3672 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3673 Handle component_type_h =
3674 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3675 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3676
3677 Method* accessor_method = nullptr;
3678 {
3679 // Prepend "()" to type to create the full method signature.
3680 ResourceMark rm(THREAD);
3681 int sig_len = type->utf8_length() + 3; // "()" and null char
3682 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3683 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3684 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3685 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3686 }
3687
3688 if (accessor_method != nullptr) {
3689 methodHandle method(THREAD, accessor_method);
3690 oop m = Reflection::new_method(method, false, CHECK_NULL);
3691 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3692 } else {
3693 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3694 }
3695
3696 int sig_index = component->generic_signature_index();
3697 if (sig_index > 0) {
3698 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3699 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3700 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3701 } else {
3702 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3703 }
3704
3705 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3706 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3707
3708 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3709 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3710
3711 return element();
3712 }
3713
3714 int reflect_ConstantPool::_oop_offset;
3715
3716 #define CONSTANTPOOL_FIELDS_DO(macro) \
3717 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3718
3719 void reflect_ConstantPool::compute_offsets() {
3720 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3721 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3722 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3723 }
3724
3725 #if INCLUDE_CDS
3726 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3727 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3728 }
3729 #endif
3730
3731 int java_lang_reflect_Parameter::_name_offset;
3732 int java_lang_reflect_Parameter::_modifiers_offset;
3733 int java_lang_reflect_Parameter::_index_offset;
3734 int java_lang_reflect_Parameter::_executable_offset;
3735
3736 #define PARAMETER_FIELDS_DO(macro) \
3737 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3738 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3739 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3740 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3741
3742 void java_lang_reflect_Parameter::compute_offsets() {
3743 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3744 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3745 }
3746
3747 #if INCLUDE_CDS
3748 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3749 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3750 }
3751 #endif
3752
3753 Handle java_lang_reflect_Parameter::create(TRAPS) {
3754 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3755 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3756 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3757 InstanceKlass* ik = InstanceKlass::cast(k);
3758 // Ensure it is initialized
3759 ik->initialize(CHECK_NH);
3760 return ik->allocate_instance_handle(THREAD);
3761 }
3762
3763 oop java_lang_reflect_Parameter::name(oop param) {
3764 return param->obj_field(_name_offset);
3765 }
3766
3767 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3768 param->obj_field_put(_name_offset, value);
3769 }
3770
3771 int java_lang_reflect_Parameter::modifiers(oop param) {
3772 return param->int_field(_modifiers_offset);
3773 }
3774
3775 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3776 param->int_field_put(_modifiers_offset, value);
3777 }
3778
3779 int java_lang_reflect_Parameter::index(oop param) {
3780 return param->int_field(_index_offset);
3781 }
3782
3783 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3784 param->int_field_put(_index_offset, value);
3785 }
3786
3787 oop java_lang_reflect_Parameter::executable(oop param) {
3788 return param->obj_field(_executable_offset);
3789 }
3790
3791 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3792 param->obj_field_put(_executable_offset, value);
3793 }
3794
3795 // java_lang_Module
3796
3797 int java_lang_Module::_loader_offset;
3798 int java_lang_Module::_name_offset;
3799 int java_lang_Module::_module_entry_offset;
3800
3801 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3802 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3803 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3804 vmSymbols::java_lang_module_init_signature(),
3805 loader, module_name, CHECK_NH);
3806 }
3807
3808 #define MODULE_FIELDS_DO(macro) \
3809 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3810 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3811
3812 void java_lang_Module::compute_offsets() {
3813 InstanceKlass* k = vmClasses::Module_klass();
3814 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3815 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3816 }
3817
3818 #if INCLUDE_CDS
3819 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3820 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3821 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3822 }
3823 #endif
3824
3825 oop java_lang_Module::loader(oop module) {
3826 return module->obj_field(_loader_offset);
3827 }
3828
3829 void java_lang_Module::set_loader(oop module, oop value) {
3830 module->obj_field_put(_loader_offset, value);
3831 }
3832
3833 oop java_lang_Module::name(oop module) {
3834 return module->obj_field(_name_offset);
3835 }
3836
3837 void java_lang_Module::set_name(oop module, oop value) {
3838 module->obj_field_put(_name_offset, value);
3839 }
3840
3841 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3842 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3843 assert(module != nullptr, "module can't be null");
3844 assert(oopDesc::is_oop(module), "module must be oop");
3845
3846 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3847 return module_entry;
3848 }
3849
3850 ModuleEntry* java_lang_Module::module_entry(oop module) {
3851 ModuleEntry* module_entry = module_entry_raw(module);
3852 if (module_entry == nullptr) {
3853 // If the inject field containing the ModuleEntry* is null then return the
3854 // class loader's unnamed module.
3855 oop loader = java_lang_Module::loader(module);
3856 Handle h_loader = Handle(Thread::current(), loader);
3857 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3858 return loader_cld->unnamed_module();
3859 }
3860 return module_entry;
3861 }
3862
3863 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3864 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3865 assert(module != nullptr, "module can't be null");
3866 assert(oopDesc::is_oop(module), "module must be oop");
3867 module->address_field_put(_module_entry_offset, (address)module_entry);
3868 }
3869
3870 Handle reflect_ConstantPool::create(TRAPS) {
3871 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3872 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3873 // Ensure it is initialized
3874 k->initialize(CHECK_NH);
3875 return k->allocate_instance_handle(THREAD);
3876 }
3877
3878
3879 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3880 oop mirror = value->pool_holder()->java_mirror();
3881 // Save the mirror to get back the constant pool.
3882 reflect->obj_field_put(_oop_offset, mirror);
3883 }
3884
3885 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3886
3887 oop mirror = reflect->obj_field(_oop_offset);
3888 Klass* k = java_lang_Class::as_Klass(mirror);
3889 assert(k->is_instance_klass(), "Must be");
3890
3891 // Get the constant pool back from the klass. Since class redefinition
3892 // merges the new constant pool into the old, this is essentially the
3893 // same constant pool as the original. If constant pool merging is
3894 // no longer done in the future, this will have to change to save
3895 // the original.
3896 return InstanceKlass::cast(k)->constants();
3897 }
3898
3899
3900 // Support for java_lang_ref_Reference
3901
3902 bool java_lang_ref_Reference::_offsets_initialized;
3903
3904 int java_lang_ref_Reference::_referent_offset;
3905 int java_lang_ref_Reference::_queue_offset;
3906 int java_lang_ref_Reference::_next_offset;
3907 int java_lang_ref_Reference::_discovered_offset;
3908
3909 #define REFERENCE_FIELDS_DO(macro) \
3910 macro(_referent_offset, k, "referent", object_signature, false); \
3911 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3912 macro(_next_offset, k, "next", reference_signature, false); \
3913 macro(_discovered_offset, k, "discovered", reference_signature, false);
3914
3915 void java_lang_ref_Reference::compute_offsets() {
3916 if (_offsets_initialized) {
3917 return;
3918 }
3919 _offsets_initialized = true;
3920 InstanceKlass* k = vmClasses::Reference_klass();
3921 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3922 }
3923
3924 #if INCLUDE_CDS
3925 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3926 f->do_bool(&_offsets_initialized);
3927 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3928 }
3929 #endif
3930
3931 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3932 assert(obj != nullptr, "sanity");
3933 if (offset != _referent_offset) {
3934 return false;
3935 }
3936
3937 Klass* k = obj->klass();
3938 if (!k->is_instance_klass()) {
3939 return false;
3940 }
3941
3942 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3943 bool is_reference = ik->reference_type() != REF_NONE;
3944 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3945 return is_reference;
3946 }
3947
3948 int java_lang_boxing_object::_value_offset;
3949 int java_lang_boxing_object::_long_value_offset;
3950
3951 #define BOXING_FIELDS_DO(macro) \
3952 macro(_value_offset, integerKlass, "value", int_signature, false); \
3953 macro(_long_value_offset, longKlass, "value", long_signature, false);
3954
3955 void java_lang_boxing_object::compute_offsets() {
3956 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3957 InstanceKlass* longKlass = vmClasses::Long_klass();
3958 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3959 }
3960
3961 #if INCLUDE_CDS
3962 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3963 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3964 }
3965 #endif
3966
3967 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3968 Klass* k = vmClasses::box_klass(type);
3969 if (k == nullptr) return nullptr;
3970 InstanceKlass* ik = InstanceKlass::cast(k);
3971 if (!ik->is_initialized()) {
3972 ik->initialize(CHECK_NULL);
3973 }
3974 return ik->allocate_instance(THREAD);
3975 }
3976
3977
3978 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3979 oop box = initialize_and_allocate(type, CHECK_NULL);
3980 if (box == nullptr) return nullptr;
3981 switch (type) {
3982 case T_BOOLEAN:
3983 box->bool_field_put(_value_offset, value->z);
3984 break;
3985 case T_CHAR:
3986 box->char_field_put(_value_offset, value->c);
3987 break;
3988 case T_FLOAT:
3989 box->float_field_put(_value_offset, value->f);
3990 break;
3991 case T_DOUBLE:
3992 box->double_field_put(_long_value_offset, value->d);
3993 break;
3994 case T_BYTE:
3995 box->byte_field_put(_value_offset, value->b);
3996 break;
3997 case T_SHORT:
3998 box->short_field_put(_value_offset, value->s);
3999 break;
4000 case T_INT:
4001 box->int_field_put(_value_offset, value->i);
4002 break;
4003 case T_LONG:
4004 box->long_field_put(_long_value_offset, value->j);
4005 break;
4006 default:
4007 return nullptr;
4008 }
4009 return box;
4010 }
4011
4012
4013 BasicType java_lang_boxing_object::basic_type(oop box) {
4014 if (box == nullptr) return T_ILLEGAL;
4015 BasicType type = vmClasses::box_klass_type(box->klass());
4016 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4017 return T_ILLEGAL;
4018 return type;
4019 }
4020
4021
4022 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4023 BasicType type = vmClasses::box_klass_type(box->klass());
4024 switch (type) {
4025 case T_BOOLEAN:
4026 value->z = box->bool_field(_value_offset);
4027 break;
4028 case T_CHAR:
4029 value->c = box->char_field(_value_offset);
4030 break;
4031 case T_FLOAT:
4032 value->f = box->float_field(_value_offset);
4033 break;
4034 case T_DOUBLE:
4035 value->d = box->double_field(_long_value_offset);
4036 break;
4037 case T_BYTE:
4038 value->b = box->byte_field(_value_offset);
4039 break;
4040 case T_SHORT:
4041 value->s = box->short_field(_value_offset);
4042 break;
4043 case T_INT:
4044 value->i = box->int_field(_value_offset);
4045 break;
4046 case T_LONG:
4047 value->j = box->long_field(_long_value_offset);
4048 break;
4049 default:
4050 return T_ILLEGAL;
4051 } // end switch
4052 return type;
4053 }
4054
4055
4056 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4057 BasicType type = vmClasses::box_klass_type(box->klass());
4058 switch (type) {
4059 case T_BOOLEAN:
4060 box->bool_field_put(_value_offset, value->z);
4061 break;
4062 case T_CHAR:
4063 box->char_field_put(_value_offset, value->c);
4064 break;
4065 case T_FLOAT:
4066 box->float_field_put(_value_offset, value->f);
4067 break;
4068 case T_DOUBLE:
4069 box->double_field_put(_long_value_offset, value->d);
4070 break;
4071 case T_BYTE:
4072 box->byte_field_put(_value_offset, value->b);
4073 break;
4074 case T_SHORT:
4075 box->short_field_put(_value_offset, value->s);
4076 break;
4077 case T_INT:
4078 box->int_field_put(_value_offset, value->i);
4079 break;
4080 case T_LONG:
4081 box->long_field_put(_long_value_offset, value->j);
4082 break;
4083 default:
4084 return T_ILLEGAL;
4085 } // end switch
4086 return type;
4087 }
4088
4089
4090 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4091 switch (type) {
4092 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4093 case T_CHAR: st->print("%d", value->c); break;
4094 case T_BYTE: st->print("%d", value->b); break;
4095 case T_SHORT: st->print("%d", value->s); break;
4096 case T_INT: st->print("%d", value->i); break;
4097 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4098 case T_FLOAT: st->print("%f", value->f); break;
4099 case T_DOUBLE: st->print("%lf", value->d); break;
4100 default: st->print("type %d?", type); break;
4101 }
4102 }
4103
4104
4105 // Support for java_lang_ref_SoftReference
4106 //
4107
4108 int java_lang_ref_SoftReference::_timestamp_offset;
4109 int java_lang_ref_SoftReference::_static_clock_offset;
4110
4111 #define SOFTREFERENCE_FIELDS_DO(macro) \
4112 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4113 macro(_static_clock_offset, k, "clock", long_signature, true)
4114
4115 void java_lang_ref_SoftReference::compute_offsets() {
4116 InstanceKlass* k = vmClasses::SoftReference_klass();
4117 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4118 }
4119
4120 #if INCLUDE_CDS
4121 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4122 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4123 }
4124 #endif
4125
4126 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4127 return ref->long_field(_timestamp_offset);
4128 }
4129
4130 jlong java_lang_ref_SoftReference::clock() {
4131 InstanceKlass* ik = vmClasses::SoftReference_klass();
4132 oop base = ik->static_field_base_raw();
4133 return base->long_field(_static_clock_offset);
4134 }
4135
4136 void java_lang_ref_SoftReference::set_clock(jlong value) {
4137 InstanceKlass* ik = vmClasses::SoftReference_klass();
4138 oop base = ik->static_field_base_raw();
4139 base->long_field_put(_static_clock_offset, value);
4140 }
4141
4142 // Support for java_lang_invoke_DirectMethodHandle
4143
4144 int java_lang_invoke_DirectMethodHandle::_member_offset;
4145
4146 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4147 oop member_name = nullptr;
4148 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4149 "a DirectMethodHandle oop is expected");
4150 return dmh->obj_field(_member_offset);
4151 }
4152
4153 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4154 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4155
4156 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4157 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4158 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4159 }
4160
4161 #if INCLUDE_CDS
4162 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4163 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4164 }
4165 #endif
4166
4167 // Support for java_lang_invoke_MethodHandle
4168
4169 int java_lang_invoke_MethodHandle::_type_offset;
4170 int java_lang_invoke_MethodHandle::_form_offset;
4171
4172 int java_lang_invoke_MemberName::_clazz_offset;
4173 int java_lang_invoke_MemberName::_name_offset;
4174 int java_lang_invoke_MemberName::_type_offset;
4175 int java_lang_invoke_MemberName::_flags_offset;
4176 int java_lang_invoke_MemberName::_method_offset;
4177 int java_lang_invoke_MemberName::_vmindex_offset;
4178
4179 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4180 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4181
4182 int java_lang_invoke_LambdaForm::_vmentry_offset;
4183
4184 #define METHODHANDLE_FIELDS_DO(macro) \
4185 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4186 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4187
4188 void java_lang_invoke_MethodHandle::compute_offsets() {
4189 InstanceKlass* k = vmClasses::MethodHandle_klass();
4190 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4191 }
4192
4193 #if INCLUDE_CDS
4194 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4195 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4196 }
4197 #endif
4198
4199 #define MEMBERNAME_FIELDS_DO(macro) \
4200 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4201 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4202 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4203 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4204 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4205
4206 void java_lang_invoke_MemberName::compute_offsets() {
4207 InstanceKlass* k = vmClasses::MemberName_klass();
4208 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4209 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4210 }
4211
4212 #if INCLUDE_CDS
4213 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4214 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4215 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4216 }
4217 #endif
4218
4219 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4220 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4221
4222 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4223 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4224 assert(k != nullptr, "jdk mismatch");
4225 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4226 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4227 }
4228
4229 #if INCLUDE_CDS
4230 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4231 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4232 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4233 }
4234 #endif
4235
4236 #define LAMBDAFORM_FIELDS_DO(macro) \
4237 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4238
4239 void java_lang_invoke_LambdaForm::compute_offsets() {
4240 InstanceKlass* k = vmClasses::LambdaForm_klass();
4241 assert (k != nullptr, "jdk mismatch");
4242 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4243 }
4244
4245 #if INCLUDE_CDS
4246 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4247 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4248 }
4249 #endif
4250
4251 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4252 return obj != nullptr && is_subclass(obj->klass());
4253 }
4254
4255 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4256 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4257
4258 #define NEP_FIELDS_DO(macro) \
4259 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4260 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4261
4262 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4263 return obj != nullptr && is_subclass(obj->klass());
4264 }
4265
4266 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4267 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4268 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4269 }
4270
4271 #if INCLUDE_CDS
4272 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4273 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4274 }
4275 #endif
4276
4277 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4278 return entry->obj_field(_method_type_offset);
4279 }
4280
4281 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4282 return entry->long_field(_downcall_stub_address_offset);
4283 }
4284
4285 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4286 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4287 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4288 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4289 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4290 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4291 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4292
4293 #define ABIDescriptor_FIELDS_DO(macro) \
4294 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4295 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4296 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4297 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4298 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4299 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4300 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4301
4302 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4303 return obj != nullptr && is_subclass(obj->klass());
4304 }
4305
4306 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4307 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4308 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4309 }
4310
4311 #if INCLUDE_CDS
4312 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4313 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4314 }
4315 #endif
4316
4317 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4318 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4319 }
4320
4321 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4322 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4323 }
4324
4325 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4326 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4327 }
4328
4329 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4330 return entry->int_field(_stackAlignment_offset);
4331 }
4332
4333 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4334 return entry->int_field(_shadowSpace_offset);
4335 }
4336
4337 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4338 return entry->obj_field(_scratch1_offset);
4339 }
4340
4341 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4342 return entry->obj_field(_scratch2_offset);
4343 }
4344
4345 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4346 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4347 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4348 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4349
4350 #define VMStorage_FIELDS_DO(macro) \
4351 macro(_type_offset, k, "type", byte_signature, false); \
4352 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4353 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4354 macro(_debugName_offset, k, "debugName", string_signature, false); \
4355
4356 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4357 return obj != nullptr && is_subclass(obj->klass());
4358 }
4359
4360 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4361 InstanceKlass* k = vmClasses::VMStorage_klass();
4362 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4363 }
4364
4365 #if INCLUDE_CDS
4366 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4367 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4368 }
4369 #endif
4370
4371 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4372 return entry->byte_field(_type_offset);
4373 }
4374
4375 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4376 return entry->int_field(_indexOrOffset_offset);
4377 }
4378
4379 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4380 return entry->short_field(_segmentMaskOrSize_offset);
4381 }
4382
4383 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4384 return entry->obj_field(_debugName_offset);
4385 }
4386
4387 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4388 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4389
4390 #define CallConv_FIELDS_DO(macro) \
4391 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4392 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4393
4394 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4395 return obj != nullptr && is_subclass(obj->klass());
4396 }
4397
4398 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4399 InstanceKlass* k = vmClasses::CallConv_klass();
4400 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4401 }
4402
4403 #if INCLUDE_CDS
4404 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4405 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4406 }
4407 #endif
4408
4409 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4410 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4411 }
4412
4413 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4414 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4415 }
4416
4417 oop java_lang_invoke_MethodHandle::type(oop mh) {
4418 return mh->obj_field(_type_offset);
4419 }
4420
4421 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4422 mh->obj_field_put(_type_offset, mtype);
4423 }
4424
4425 oop java_lang_invoke_MethodHandle::form(oop mh) {
4426 assert(_form_offset != 0, "");
4427 return mh->obj_field(_form_offset);
4428 }
4429
4430 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4431 assert(_form_offset != 0, "");
4432 mh->obj_field_put(_form_offset, lform);
4433 }
4434
4435 /// MemberName accessors
4436
4437 oop java_lang_invoke_MemberName::clazz(oop mname) {
4438 assert(is_instance(mname), "wrong type");
4439 return mname->obj_field(_clazz_offset);
4440 }
4441
4442 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4443 assert(is_instance(mname), "wrong type");
4444 mname->obj_field_put(_clazz_offset, clazz);
4445 }
4446
4447 oop java_lang_invoke_MemberName::name(oop mname) {
4448 assert(is_instance(mname), "wrong type");
4449 return mname->obj_field(_name_offset);
4450 }
4451
4452 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4453 assert(is_instance(mname), "wrong type");
4454 mname->obj_field_put(_name_offset, name);
4455 }
4456
4457 oop java_lang_invoke_MemberName::type(oop mname) {
4458 assert(is_instance(mname), "wrong type");
4459 return mname->obj_field(_type_offset);
4460 }
4461
4462 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4463 assert(is_instance(mname), "wrong type");
4464 mname->obj_field_put(_type_offset, type);
4465 }
4466
4467 int java_lang_invoke_MemberName::flags(oop mname) {
4468 assert(is_instance(mname), "wrong type");
4469 return mname->int_field(_flags_offset);
4470 }
4471
4472 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4473 assert(is_instance(mname), "wrong type");
4474 mname->int_field_put(_flags_offset, flags);
4475 }
4476
4477
4478 // Return vmtarget from ResolvedMethodName method field through indirection
4479 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4480 assert(is_instance(mname), "wrong type");
4481 oop method = mname->obj_field(_method_offset);
4482 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4483 }
4484
4485 bool java_lang_invoke_MemberName::is_method(oop mname) {
4486 assert(is_instance(mname), "must be MemberName");
4487 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4488 }
4489
4490 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4491 assert(is_instance(mname), "wrong type");
4492 mname->obj_field_put(_method_offset, resolved_method);
4493 }
4494
4495 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4496 assert(is_instance(mname), "wrong type");
4497 return (intptr_t) mname->address_field(_vmindex_offset);
4498 }
4499
4500 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4501 assert(is_instance(mname), "wrong type");
4502 mname->address_field_put(_vmindex_offset, (address) index);
4503 }
4504
4505
4506 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4507 assert(is_instance(resolved_method), "wrong type");
4508 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4509 assert(m->is_method(), "must be");
4510 return m;
4511 }
4512
4513 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4514 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4515 assert(is_instance(resolved_method), "wrong type");
4516 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4517 }
4518
4519 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4520 assert(is_instance(resolved_method), "wrong type");
4521 resolved_method->obj_field_put(_vmholder_offset, holder);
4522 }
4523
4524 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4525 const Method* method = m();
4526
4527 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4528 oop resolved_method = ResolvedMethodTable::find_method(method);
4529 if (resolved_method != nullptr) {
4530 return resolved_method;
4531 }
4532
4533 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4534 if (!k->is_initialized()) {
4535 k->initialize(CHECK_NULL);
4536 }
4537
4538 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4539
4540 NoSafepointVerifier nsv;
4541
4542 if (method->is_old()) {
4543 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4544 method->get_new_method();
4545 }
4546
4547 InstanceKlass* holder = method->method_holder();
4548
4549 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4550 // Add a reference to the loader (actually mirror because hidden classes may not have
4551 // distinct loaders) to ensure the metadata is kept alive.
4552 // This mirror may be different than the one in clazz field.
4553 set_vmholder(new_resolved_method, holder->java_mirror());
4554
4555 // Set flag in class to indicate this InstanceKlass has entries in the table
4556 // to avoid walking table during redefinition if none of the redefined classes
4557 // have any membernames in the table.
4558 holder->set_has_resolved_methods();
4559
4560 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4561 }
4562
4563 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4564 assert(is_instance(lform), "wrong type");
4565 return lform->obj_field(_vmentry_offset);
4566 }
4567
4568
4569 // Support for java_lang_invoke_MethodType
4570
4571 int java_lang_invoke_MethodType::_rtype_offset;
4572 int java_lang_invoke_MethodType::_ptypes_offset;
4573
4574 #define METHODTYPE_FIELDS_DO(macro) \
4575 macro(_rtype_offset, k, "rtype", class_signature, false); \
4576 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4577
4578 void java_lang_invoke_MethodType::compute_offsets() {
4579 InstanceKlass* k = vmClasses::MethodType_klass();
4580 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4581 }
4582
4583 #if INCLUDE_CDS
4584 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4585 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4586 }
4587 #endif
4588
4589 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4590 st->print("(");
4591 objArrayOop pts = ptypes(mt);
4592 if (pts != nullptr) {
4593 for (int i = 0, limit = pts->length(); i < limit; i++) {
4594 java_lang_Class::print_signature(pts->obj_at(i), st);
4595 }
4596 } else {
4597 st->print("null");
4598 }
4599 st->print(")");
4600 oop rt = rtype(mt);
4601 if (rt != nullptr) {
4602 java_lang_Class::print_signature(rt, st);
4603 } else {
4604 st->print("null");
4605 }
4606 }
4607
4608 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4609 ResourceMark rm;
4610 stringStream buffer(128);
4611 print_signature(mt, &buffer);
4612 const char* sigstr = buffer.base();
4613 int siglen = (int) buffer.size();
4614 Symbol *name;
4615 if (!intern_if_not_found) {
4616 name = SymbolTable::probe(sigstr, siglen);
4617 } else {
4618 name = SymbolTable::new_symbol(sigstr, siglen);
4619 }
4620 return name;
4621 }
4622
4623 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4624 if (mt1 == mt2)
4625 return true;
4626 if (rtype(mt1) != rtype(mt2))
4627 return false;
4628 if (ptype_count(mt1) != ptype_count(mt2))
4629 return false;
4630 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4631 if (ptype(mt1, i) != ptype(mt2, i))
4632 return false;
4633 }
4634 return true;
4635 }
4636
4637 oop java_lang_invoke_MethodType::rtype(oop mt) {
4638 assert(is_instance(mt), "must be a MethodType");
4639 return mt->obj_field(_rtype_offset);
4640 }
4641
4642 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4643 assert(is_instance(mt), "must be a MethodType");
4644 return (objArrayOop) mt->obj_field(_ptypes_offset);
4645 }
4646
4647 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4648 return ptypes(mt)->obj_at(idx);
4649 }
4650
4651 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4652 return ptypes(mt)->length();
4653 }
4654
4655 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4656 objArrayOop pts = ptypes(mt);
4657 int count = pts->length();
4658 int slots = 0;
4659 for (int i = 0; i < count; i++) {
4660 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4661 slots += type2size[bt];
4662 }
4663 return slots;
4664 }
4665
4666 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4667 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4668 return type2size[bt];
4669 }
4670
4671
4672 // Support for java_lang_invoke_CallSite
4673
4674 int java_lang_invoke_CallSite::_target_offset;
4675 int java_lang_invoke_CallSite::_context_offset;
4676
4677 #define CALLSITE_FIELDS_DO(macro) \
4678 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4679 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4680
4681 void java_lang_invoke_CallSite::compute_offsets() {
4682 InstanceKlass* k = vmClasses::CallSite_klass();
4683 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4684 }
4685
4686 #if INCLUDE_CDS
4687 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4688 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4689 }
4690 #endif
4691
4692 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4693 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4694
4695 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4696 return dep_oop;
4697 }
4698
4699 // Support for java_lang_invoke_ConstantCallSite
4700
4701 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4702
4703 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4704 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4705
4706 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4707 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4708 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4709 }
4710
4711 #if INCLUDE_CDS
4712 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4713 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4714 }
4715 #endif
4716
4717 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4718
4719 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4720 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4721
4722 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4723 InstanceKlass* k = vmClasses::Context_klass();
4724 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4725 }
4726
4727 #if INCLUDE_CDS
4728 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4729 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4730 }
4731 #endif
4732
4733 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4734 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4735 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4736 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4737 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4738 return dep_ctx;
4739 }
4740
4741 // Support for java_security_AccessControlContext
4742
4743 int java_security_AccessControlContext::_context_offset;
4744 int java_security_AccessControlContext::_privilegedContext_offset;
4745 int java_security_AccessControlContext::_isPrivileged_offset;
4746 int java_security_AccessControlContext::_isAuthorized_offset;
4747
4748 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4749 macro(_context_offset, k, "context", protectiondomain_signature, false); \
4750 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4751 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
4752 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
4753
4754 void java_security_AccessControlContext::compute_offsets() {
4755 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4756 InstanceKlass* k = vmClasses::AccessControlContext_klass();
4757 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4758 }
4759
4760 #if INCLUDE_CDS
4761 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4762 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4763 }
4764 #endif
4765
4766 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4767 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4768 assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4769 // Ensure klass is initialized
4770 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4771 // Allocate result
4772 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4773 // Fill in values
4774 result->obj_field_put(_context_offset, context());
4775 result->obj_field_put(_privilegedContext_offset, privileged_context());
4776 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4777 result->bool_field_put(_isAuthorized_offset, true);
4778 return result;
4779 }
4780
4781
4782 // Support for java_lang_ClassLoader
4783
4784 int java_lang_ClassLoader::_loader_data_offset;
4785 int java_lang_ClassLoader::_parallelCapable_offset;
4786 int java_lang_ClassLoader::_name_offset;
4787 int java_lang_ClassLoader::_nameAndId_offset;
4788 int java_lang_ClassLoader::_unnamedModule_offset;
4789 int java_lang_ClassLoader::_parent_offset;
4790
4791 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4792 assert(loader != nullptr, "loader must not be null");
4793 assert(oopDesc::is_oop(loader), "loader must be oop");
4794 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4795 }
4796
4797 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4798 assert(loader != nullptr, "loader must not be null");
4799 assert(oopDesc::is_oop(loader), "loader must be oop");
4800 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4801 }
4802
4803 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4804 assert(loader != nullptr, "loader must not be null");
4805 assert(oopDesc::is_oop(loader), "loader must be oop");
4806 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4807 }
4808
4809 #define CLASSLOADER_FIELDS_DO(macro) \
4810 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4811 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4812 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4813 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4814 macro(_parent_offset, k1, "parent", classloader_signature, false)
4815
4816 void java_lang_ClassLoader::compute_offsets() {
4817 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4818 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4819
4820 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4821 }
4822
4823 #if INCLUDE_CDS
4824 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4825 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4826 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4827 }
4828 #endif
4829
4830 oop java_lang_ClassLoader::parent(oop loader) {
4831 assert(is_instance(loader), "loader must be oop");
4832 return loader->obj_field(_parent_offset);
4833 }
4834
4835 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4836 assert(is_instance(loader), "loader must be oop");
4837 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4838 }
4839
4840 // Returns the name field of this class loader. If the name field has not
4841 // been set, null will be returned.
4842 oop java_lang_ClassLoader::name(oop loader) {
4843 assert(is_instance(loader), "loader must be oop");
4844 return loader->obj_field(_name_offset);
4845 }
4846
4847 // Returns the nameAndId field of this class loader. The format is
4848 // as follows:
4849 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4850 // If the defining loader has no name then <qualified-class-name> @<id>
4851 // If built-in loader, then omit '@<id>' as there is only one instance.
4852 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4853 oop java_lang_ClassLoader::nameAndId(oop loader) {
4854 assert(is_instance(loader), "loader must be oop");
4855 return loader->obj_field(_nameAndId_offset);
4856 }
4857
4858 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4859 assert(is_instance(loader), "loader must be oop");
4860 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4861 oop acl = loader;
4862 debug_only(jint loop_count = 0);
4863 // This loop taken verbatim from ClassLoader.java:
4864 do {
4865 acl = parent(acl);
4866 if (cl == acl) {
4867 return true;
4868 }
4869 assert(++loop_count > 0, "loop_count overflow");
4870 } while (acl != nullptr);
4871 return false;
4872 }
4873
4874 bool java_lang_ClassLoader::is_instance(oop obj) {
4875 return obj != nullptr && is_subclass(obj->klass());
4876 }
4877
4878
4879 // For class loader classes, parallelCapable defined
4880 // based on non-null field
4881 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4882 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4883 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4884 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4885 }
4886
4887 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4888 oop cl = SystemDictionary::java_system_loader();
4889 while(cl != nullptr) {
4890 if (cl == loader) return true;
4891 cl = parent(cl);
4892 }
4893 return false;
4894 }
4895
4896 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4897 assert(is_instance(loader), "loader must be oop");
4898 return loader->obj_field(_unnamedModule_offset);
4899 }
4900
4901 // Support for java_lang_System
4902 //
4903
4904 int java_lang_System::_static_in_offset;
4905 int java_lang_System::_static_out_offset;
4906 int java_lang_System::_static_err_offset;
4907
4908 #define SYSTEM_FIELDS_DO(macro) \
4909 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4910 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4911 macro(_static_err_offset, k, "err", print_stream_signature, true);
4912
4913 void java_lang_System::compute_offsets() {
4914 InstanceKlass* k = vmClasses::System_klass();
4915 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4916 }
4917
4918 // This field tells us that a security manager can never be installed so we
4919 // can completely skip populating the ProtectionDomainCacheTable.
4920 bool java_lang_System::allow_security_manager() {
4921 return false;
4922 }
4923
4924 // This field tells us that a security manager is installed.
4925 bool java_lang_System::has_security_manager() {
4926 return false;
4927 }
4928
4929 #if INCLUDE_CDS
4930 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4931 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4932 }
4933 #endif
4934
4935 // Support for jdk_internal_misc_UnsafeConstants
4936 //
4937 class UnsafeConstantsFixup : public FieldClosure {
4938 private:
4939 int _address_size;
4940 int _page_size;
4941 bool _big_endian;
4942 bool _use_unaligned_access;
4943 int _data_cache_line_flush_size;
4944 public:
4945 UnsafeConstantsFixup() {
4946 // round up values for all static final fields
4947 _address_size = sizeof(void*);
4948 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4949 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4950 _use_unaligned_access = UseUnalignedAccesses;
4951 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4952 }
4953
4954 void do_field(fieldDescriptor* fd) {
4955 oop mirror = fd->field_holder()->java_mirror();
4956 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4957 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4958 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4959 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4960 if (fd->name() == vmSymbols::address_size_name()) {
4961 mirror->int_field_put(fd->offset(), _address_size);
4962 } else if (fd->name() == vmSymbols::page_size_name()) {
4963 mirror->int_field_put(fd->offset(), _page_size);
4964 } else if (fd->name() == vmSymbols::big_endian_name()) {
4965 mirror->bool_field_put(fd->offset(), _big_endian);
4966 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4967 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4968 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4969 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4970 } else {
4971 assert(false, "unexpected UnsafeConstants field");
4972 }
4973 }
4974 };
4975
4976 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4977 UnsafeConstantsFixup fixup;
4978 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4979 }
4980
4981
4982 // java_lang_StackTraceElement
4983
4984 int java_lang_StackTraceElement::_methodName_offset;
4985 int java_lang_StackTraceElement::_fileName_offset;
4986 int java_lang_StackTraceElement::_lineNumber_offset;
4987 int java_lang_StackTraceElement::_moduleName_offset;
4988 int java_lang_StackTraceElement::_moduleVersion_offset;
4989 int java_lang_StackTraceElement::_classLoaderName_offset;
4990 int java_lang_StackTraceElement::_declaringClass_offset;
4991 int java_lang_StackTraceElement::_declaringClassObject_offset;
4992
4993 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4994 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4995 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4996 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4997 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4998 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4999 macro(_methodName_offset, k, "methodName", string_signature, false); \
5000 macro(_fileName_offset, k, "fileName", string_signature, false); \
5001 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
5002
5003 // Support for java_lang_StackTraceElement
5004 void java_lang_StackTraceElement::compute_offsets() {
5005 InstanceKlass* k = vmClasses::StackTraceElement_klass();
5006 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5007 }
5008
5009 #if INCLUDE_CDS
5010 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
5011 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5012 }
5013 #endif
5014
5015 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
5016 element->obj_field_put(_fileName_offset, value);
5017 }
5018
5019 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
5020 element->obj_field_put(_declaringClass_offset, value);
5021 }
5022
5023 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5024 element->obj_field_put(_methodName_offset, value);
5025 }
5026
5027 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5028 element->int_field_put(_lineNumber_offset, value);
5029 }
5030
5031 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5032 element->obj_field_put(_moduleName_offset, value);
5033 }
5034
5035 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5036 element->obj_field_put(_moduleVersion_offset, value);
5037 }
5038
5039 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5040 element->obj_field_put(_classLoaderName_offset, value);
5041 }
5042
5043 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5044 element->obj_field_put(_declaringClassObject_offset, value);
5045 }
5046
5047
5048 // java_lang_AssertionStatusDirectives
5049
5050 int java_lang_AssertionStatusDirectives::_classes_offset;
5051 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5052 int java_lang_AssertionStatusDirectives::_packages_offset;
5053 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5054 int java_lang_AssertionStatusDirectives::_deflt_offset;
5055
5056 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5057 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5058 macro(_classes_offset, k, "classes", string_array_signature, false); \
5059 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5060 macro(_packages_offset, k, "packages", string_array_signature, false); \
5061 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5062 macro(_deflt_offset, k, "deflt", bool_signature, false)
5063
5064 void java_lang_AssertionStatusDirectives::compute_offsets() {
5065 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5066 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5067 }
5068
5069 #if INCLUDE_CDS
5070 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5071 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5072 }
5073 #endif
5074
5075 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5076 o->obj_field_put(_classes_offset, val);
5077 }
5078
5079 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5080 o->obj_field_put(_classEnabled_offset, val);
5081 }
5082
5083 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5084 o->obj_field_put(_packages_offset, val);
5085 }
5086
5087 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5088 o->obj_field_put(_packageEnabled_offset, val);
5089 }
5090
5091 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5092 o->bool_field_put(_deflt_offset, val);
5093 }
5094
5095 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5096
5097 #define AOS_FIELDS_DO(macro) \
5098 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5099
5100 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5101 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5102 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5103 }
5104
5105 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5106 assert(_owner_offset != 0, "Must be initialized");
5107 return obj->obj_field(_owner_offset);
5108 }
5109
5110 #if INCLUDE_CDS
5111 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5112 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5113 }
5114 #endif
5115
5116 int vector_VectorPayload::_payload_offset;
5117
5118 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5119 macro(_payload_offset, k, "payload", object_signature, false)
5120
5121 void vector_VectorPayload::compute_offsets() {
5122 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5123 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5124 }
5125
5126 #if INCLUDE_CDS
5127 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5128 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5129 }
5130 #endif
5131
5132 void vector_VectorPayload::set_payload(oop o, oop val) {
5133 o->obj_field_put(_payload_offset, val);
5134 }
5135
5136 bool vector_VectorPayload::is_instance(oop obj) {
5137 return obj != nullptr && is_subclass(obj->klass());
5138 }
5139
5140 int java_lang_Integer_IntegerCache::_static_cache_offset;
5141 int java_lang_Long_LongCache::_static_cache_offset;
5142 int java_lang_Character_CharacterCache::_static_cache_offset;
5143 int java_lang_Short_ShortCache::_static_cache_offset;
5144 int java_lang_Byte_ByteCache::_static_cache_offset;
5145
5146 #define INTEGER_CACHE_FIELDS_DO(macro) \
5147 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5148
5149 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5150 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5151 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5152 }
5153
5154 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5155 oop base = ik->static_field_base_raw();
5156 return objArrayOop(base->obj_field(_static_cache_offset));
5157 }
5158
5159 Symbol* java_lang_Integer_IntegerCache::symbol() {
5160 return vmSymbols::java_lang_Integer_IntegerCache();
5161 }
5162
5163 #if INCLUDE_CDS
5164 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5165 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5166 }
5167 #endif
5168 #undef INTEGER_CACHE_FIELDS_DO
5169
5170 jint java_lang_Integer::value(oop obj) {
5171 jvalue v;
5172 java_lang_boxing_object::get_value(obj, &v);
5173 return v.i;
5174 }
5175
5176 #define LONG_CACHE_FIELDS_DO(macro) \
5177 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5178
5179 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5180 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5181 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5182 }
5183
5184 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5185 oop base = ik->static_field_base_raw();
5186 return objArrayOop(base->obj_field(_static_cache_offset));
5187 }
5188
5189 Symbol* java_lang_Long_LongCache::symbol() {
5190 return vmSymbols::java_lang_Long_LongCache();
5191 }
5192
5193 #if INCLUDE_CDS
5194 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5195 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5196 }
5197 #endif
5198 #undef LONG_CACHE_FIELDS_DO
5199
5200 jlong java_lang_Long::value(oop obj) {
5201 jvalue v;
5202 java_lang_boxing_object::get_value(obj, &v);
5203 return v.j;
5204 }
5205
5206 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5207 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5208
5209 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5210 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5211 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5212 }
5213
5214 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5215 oop base = ik->static_field_base_raw();
5216 return objArrayOop(base->obj_field(_static_cache_offset));
5217 }
5218
5219 Symbol* java_lang_Character_CharacterCache::symbol() {
5220 return vmSymbols::java_lang_Character_CharacterCache();
5221 }
5222
5223 #if INCLUDE_CDS
5224 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5225 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5226 }
5227 #endif
5228 #undef CHARACTER_CACHE_FIELDS_DO
5229
5230 jchar java_lang_Character::value(oop obj) {
5231 jvalue v;
5232 java_lang_boxing_object::get_value(obj, &v);
5233 return v.c;
5234 }
5235
5236 #define SHORT_CACHE_FIELDS_DO(macro) \
5237 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5238
5239 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5240 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5241 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5242 }
5243
5244 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5245 oop base = ik->static_field_base_raw();
5246 return objArrayOop(base->obj_field(_static_cache_offset));
5247 }
5248
5249 Symbol* java_lang_Short_ShortCache::symbol() {
5250 return vmSymbols::java_lang_Short_ShortCache();
5251 }
5252
5253 #if INCLUDE_CDS
5254 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5255 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5256 }
5257 #endif
5258 #undef SHORT_CACHE_FIELDS_DO
5259
5260 jshort java_lang_Short::value(oop obj) {
5261 jvalue v;
5262 java_lang_boxing_object::get_value(obj, &v);
5263 return v.s;
5264 }
5265
5266 #define BYTE_CACHE_FIELDS_DO(macro) \
5267 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5268
5269 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5270 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5271 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5272 }
5273
5274 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5275 oop base = ik->static_field_base_raw();
5276 return objArrayOop(base->obj_field(_static_cache_offset));
5277 }
5278
5279 Symbol* java_lang_Byte_ByteCache::symbol() {
5280 return vmSymbols::java_lang_Byte_ByteCache();
5281 }
5282
5283 #if INCLUDE_CDS
5284 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5285 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5286 }
5287 #endif
5288 #undef BYTE_CACHE_FIELDS_DO
5289
5290 jbyte java_lang_Byte::value(oop obj) {
5291 jvalue v;
5292 java_lang_boxing_object::get_value(obj, &v);
5293 return v.b;
5294 }
5295
5296 int java_lang_Boolean::_static_TRUE_offset;
5297 int java_lang_Boolean::_static_FALSE_offset;
5298
5299 #define BOOLEAN_FIELDS_DO(macro) \
5300 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5301 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5302
5303
5304 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5305 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5306 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5307 }
5308
5309 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5310 oop base = ik->static_field_base_raw();
5311 return base->obj_field(_static_TRUE_offset);
5312 }
5313
5314 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5315 oop base = ik->static_field_base_raw();
5316 return base->obj_field(_static_FALSE_offset);
5317 }
5318
5319 Symbol* java_lang_Boolean::symbol() {
5320 return vmSymbols::java_lang_Boolean();
5321 }
5322
5323 #if INCLUDE_CDS
5324 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5325 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5326 }
5327 #endif
5328 #undef BOOLEAN_CACHE_FIELDS_DO
5329
5330 jboolean java_lang_Boolean::value(oop obj) {
5331 jvalue v;
5332 java_lang_boxing_object::get_value(obj, &v);
5333 return v.z;
5334 }
5335
5336 // java_lang_reflect_RecordComponent
5337
5338 int java_lang_reflect_RecordComponent::_clazz_offset;
5339 int java_lang_reflect_RecordComponent::_name_offset;
5340 int java_lang_reflect_RecordComponent::_type_offset;
5341 int java_lang_reflect_RecordComponent::_accessor_offset;
5342 int java_lang_reflect_RecordComponent::_signature_offset;
5343 int java_lang_reflect_RecordComponent::_annotations_offset;
5344 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5345
5346 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5347 macro(_clazz_offset, k, "clazz", class_signature, false); \
5348 macro(_name_offset, k, "name", string_signature, false); \
5349 macro(_type_offset, k, "type", class_signature, false); \
5350 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5351 macro(_signature_offset, k, "signature", string_signature, false); \
5352 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5353 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5354
5355 // Support for java_lang_reflect_RecordComponent
5356 void java_lang_reflect_RecordComponent::compute_offsets() {
5357 InstanceKlass* k = vmClasses::RecordComponent_klass();
5358 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5359 }
5360
5361 #if INCLUDE_CDS
5362 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5363 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5364 }
5365 #endif
5366
5367 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5368 element->obj_field_put(_clazz_offset, value);
5369 }
5370
5371 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5372 element->obj_field_put(_name_offset, value);
5373 }
5374
5375 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5376 element->obj_field_put(_type_offset, value);
5377 }
5378
5379 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5380 element->obj_field_put(_accessor_offset, value);
5381 }
5382
5383 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5384 element->obj_field_put(_signature_offset, value);
5385 }
5386
5387 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5388 element->obj_field_put(_annotations_offset, value);
5389 }
5390
5391 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5392 element->obj_field_put(_typeAnnotations_offset, value);
5393 }
5394
5395 // java_lang_InternalError
5396 int java_lang_InternalError::_during_unsafe_access_offset;
5397
5398 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5399 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5400 }
5401
5402 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5403 return internal_error->bool_field(_during_unsafe_access_offset);
5404 }
5405
5406 void java_lang_InternalError::compute_offsets() {
5407 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5408 }
5409
5410 #if INCLUDE_CDS
5411 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5412 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5413 }
5414 #endif
5415
5416 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5417 f(java_lang_Class) \
5418 f(java_lang_String) \
5419 f(java_lang_ref_Reference) \
5420 //end
5421
5422 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5423 f(java_lang_System) \
5424 f(java_lang_ClassLoader) \
5425 f(java_lang_Throwable) \
5426 f(java_lang_Thread) \
5427 f(java_lang_Thread_FieldHolder) \
5428 f(java_lang_Thread_Constants) \
5429 f(java_lang_ThreadGroup) \
5430 f(java_lang_VirtualThread) \
5431 f(java_lang_InternalError) \
5432 f(java_lang_AssertionStatusDirectives) \
5433 f(java_lang_ref_SoftReference) \
5434 f(java_lang_invoke_MethodHandle) \
5435 f(java_lang_invoke_DirectMethodHandle) \
5436 f(java_lang_invoke_MemberName) \
5437 f(java_lang_invoke_ResolvedMethodName) \
5438 f(java_lang_invoke_LambdaForm) \
5439 f(java_lang_invoke_MethodType) \
5440 f(java_lang_invoke_CallSite) \
5441 f(java_lang_invoke_ConstantCallSite) \
5442 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5443 f(java_security_AccessControlContext) \
5444 f(java_lang_reflect_AccessibleObject) \
5445 f(java_lang_reflect_Method) \
5446 f(java_lang_reflect_Constructor) \
5447 f(java_lang_reflect_Field) \
5448 f(java_lang_reflect_RecordComponent) \
5449 f(reflect_ConstantPool) \
5450 f(java_lang_reflect_Parameter) \
5451 f(java_lang_Module) \
5452 f(java_lang_StackTraceElement) \
5453 f(java_lang_ClassFrameInfo) \
5454 f(java_lang_StackFrameInfo) \
5455 f(java_lang_LiveStackFrameInfo) \
5456 f(jdk_internal_vm_ContinuationScope) \
5457 f(jdk_internal_vm_Continuation) \
5458 f(jdk_internal_vm_StackChunk) \
5459 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5460 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5461 f(jdk_internal_foreign_abi_ABIDescriptor) \
5462 f(jdk_internal_foreign_abi_VMStorage) \
5463 f(jdk_internal_foreign_abi_CallConv) \
5464 f(jdk_internal_misc_UnsafeConstants) \
5465 f(java_lang_boxing_object) \
5466 f(vector_VectorPayload) \
5467 //end
5468
5469 #define BASIC_JAVA_CLASSES_DO(f) \
5470 BASIC_JAVA_CLASSES_DO_PART1(f) \
5471 BASIC_JAVA_CLASSES_DO_PART2(f)
5472
5473 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5474
5475 // Compute field offsets of all the classes in this file
5476 void JavaClasses::compute_offsets() {
5477 if (CDSConfig::is_using_archive()) {
5478 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5479 JvmtiExport::has_early_class_hook_env()),
5480 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5481 // None of the classes used by the rest of this function can be replaced by
5482 // JVMTI ClassFileLoadHook.
5483 // We are safe to use the archived offsets, which have already been restored
5484 // by JavaClasses::serialize_offsets, without computing the offsets again.
5485 return;
5486 }
5487
5488 // We have already called the compute_offsets() of the
5489 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5490 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5491 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5492 }
5493
5494 #if INCLUDE_CDS
5495 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5496
5497 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5498 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5499 }
5500 #endif
5501
5502 #if INCLUDE_CDS_JAVA_HEAP
5503 bool JavaClasses::is_supported_for_archiving(oop obj) {
5504 Klass* klass = obj->klass();
5505
5506 if (!CDSConfig::is_dumping_invokedynamic()) {
5507 // These are supported by CDS only when CDSConfig::is_dumping_invokedynamic() is enabled.
5508 if (klass == vmClasses::ResolvedMethodName_klass() ||
5509 klass == vmClasses::MemberName_klass() ||
5510 klass == vmClasses::Context_klass()) {
5511 return false;
5512 }
5513 }
5514
5515 if (klass->is_subclass_of(vmClasses::Reference_klass())) {
5516 // It's problematic to archive Reference objects. One of the reasons is that
5517 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5518 return false;
5519 }
5520
5521 return true;
5522 }
5523 #endif
5524
5525 #ifndef PRODUCT
5526
5527 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5528
5529 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5530 const char* field_sig) {
5531 EXCEPTION_MARK;
5532 fieldDescriptor fd;
5533 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5534 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5535 InstanceKlass* ik = InstanceKlass::cast(k);
5536 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5537 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5538 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5539 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5540 return false;
5541 }
5542 if (fd.is_static()) {
5543 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5544 return false;
5545 }
5546 if (fd.offset() == deserialized_offset ) {
5547 return true;
5548 } else {
5549 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5550 klass_name, field_name, deserialized_offset, fd.offset());
5551 return false;
5552 }
5553 }
5554
5555 void JavaClasses::check_offsets() {
5556 bool valid = true;
5557
5558 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5559 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5560
5561 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5562 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5563
5564 // Boxed primitive objects (java_lang_boxing_object)
5565
5566 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5567 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5568 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5569 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5570 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5571 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5572 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5573 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5574
5575 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5576 }
5577
5578 #endif // PRODUCT
5579
5580 int InjectedField::compute_offset() {
5581 InstanceKlass* ik = InstanceKlass::cast(klass());
5582 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5583 if (!may_be_java && !fs.field_flags().is_injected()) {
5584 // Only look at injected fields
5585 continue;
5586 }
5587 if (fs.name() == name() && fs.signature() == signature()) {
5588 return fs.offset();
5589 }
5590 }
5591 ResourceMark rm;
5592 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)" : "");
5593 #ifndef PRODUCT
5594 ik->print();
5595 tty->print_cr("all fields:");
5596 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5597 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5598 }
5599 #endif //PRODUCT
5600 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5601 return -1;
5602 }
5603
5604 void javaClasses_init() {
5605 JavaClasses::compute_offsets();
5606 JavaClasses::check_offsets();
5607 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5608 }