1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds/aotReferenceObjSupport.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/jvmtiThreadState.hpp" // for JvmtiVTMSTransitionDisabler
70 #include "prims/methodHandles.hpp"
71 #include "prims/resolvedMethodTable.hpp"
72 #include "runtime/continuationEntry.inline.hpp"
73 #include "runtime/continuationJavaClasses.inline.hpp"
74 #include "runtime/fieldDescriptor.inline.hpp"
75 #include "runtime/frame.inline.hpp"
76 #include "runtime/handles.inline.hpp"
77 #include "runtime/handshake.hpp"
78 #include "runtime/init.hpp"
79 #include "runtime/interfaceSupport.inline.hpp"
80 #include "runtime/java.hpp"
81 #include "runtime/javaCalls.hpp"
82 #include "runtime/javaThread.hpp"
83 #include "runtime/jniHandles.inline.hpp"
84 #include "runtime/reflectionUtils.hpp"
85 #include "runtime/safepoint.hpp"
86 #include "runtime/safepointVerifiers.hpp"
87 #include "runtime/synchronizer.inline.hpp"
88 #include "runtime/threadSMR.hpp"
89 #include "runtime/vframe.inline.hpp"
90 #include "runtime/vm_version.hpp"
91 #include "utilities/align.hpp"
92 #include "utilities/globalDefinitions.hpp"
93 #include "utilities/growableArray.hpp"
94 #include "utilities/preserveException.hpp"
95 #include "utilities/utf8.hpp"
96 #if INCLUDE_JVMCI
97 #include "jvmci/jvmciJavaClasses.hpp"
98 #endif
99
100 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
101 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
102
103 InjectedField JavaClasses::_injected_fields[] = {
104 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
105 };
106
107 // Register native methods of Object
108 void java_lang_Object::register_natives(TRAPS) {
109 InstanceKlass* obj = vmClasses::Object_klass();
110 Method::register_native(obj, vmSymbols::hashCode_name(),
111 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
112 Method::register_native(obj, vmSymbols::wait_name(),
113 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
114 Method::register_native(obj, vmSymbols::notify_name(),
115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
116 Method::register_native(obj, vmSymbols::notifyAll_name(),
117 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
118 Method::register_native(obj, vmSymbols::clone_name(),
119 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
120 }
121
122 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
123 return _injected_fields[(int)id].compute_offset();
124 }
125
126 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
127 *field_count = 0;
128
129 vmSymbolID sid = vmSymbols::find_sid(class_name);
130 if (sid == vmSymbolID::NO_SID) {
131 // Only well known classes can inject fields
132 return nullptr;
133 }
134
135 int count = 0;
136 int start = -1;
137
138 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
139 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
140 count++; \
141 if (start == -1) { \
142 start = (int)InjectedFieldID::klass##_##name##_enum; \
143 } \
144 }
145 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
146 #undef LOOKUP_INJECTED_FIELD
147
148 if (start != -1) {
149 *field_count = count;
150 return _injected_fields + start;
151 }
152 return nullptr;
153 }
154
155
156 // Helpful routine for computing field offsets at run time rather than hardcoding them
157 // Finds local fields only, including static fields. Static field offsets are from the
158 // beginning of the mirror.
159 void JavaClasses::compute_offset(int &dest_offset,
160 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
161 bool is_static) {
162 fieldDescriptor fd;
163 if (ik == nullptr) {
164 ResourceMark rm;
165 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
166 vm_exit_during_initialization("Invalid layout of well-known class");
167 }
168
169 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
170 ResourceMark rm;
171 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
172 name_symbol->as_C_string(), signature_symbol->as_C_string());
173 #ifndef PRODUCT
174 // Prints all fields and offsets
175 Log(class) lt;
176 LogStream ls(lt.error());
177 ik->print_on(&ls);
178 #endif //PRODUCT
179 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
180 }
181 dest_offset = fd.offset();
182 }
183
184 // Overloading to pass name as a string.
185 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
186 const char* name_string, Symbol* signature_symbol,
187 bool is_static) {
188 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
189 if (name == nullptr) {
190 ResourceMark rm;
191 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
192 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
193 }
194 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
195 }
196
197 // java_lang_String
198
199 int java_lang_String::_value_offset;
200 int java_lang_String::_hash_offset;
201 int java_lang_String::_hashIsZero_offset;
202 int java_lang_String::_coder_offset;
203 int java_lang_String::_flags_offset;
204
205 bool java_lang_String::_initialized;
206
207
208 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
209 uint8_t* addr = flags_addr(java_string);
210 uint8_t value = Atomic::load(addr);
211 while ((value & flag_mask) == 0) {
212 uint8_t old_value = value;
213 value |= flag_mask;
214 value = Atomic::cmpxchg(addr, old_value, value);
215 if (value == old_value) return false; // Flag bit changed from 0 to 1.
216 }
217 return true; // Flag bit is already 1.
218 }
219
220 #define STRING_FIELDS_DO(macro) \
221 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
222 macro(_hash_offset, k, "hash", int_signature, false); \
223 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
224 macro(_coder_offset, k, "coder", byte_signature, false);
225
226 void java_lang_String::compute_offsets() {
227 if (_initialized) {
228 return;
229 }
230
231 InstanceKlass* k = vmClasses::String_klass();
232 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
233 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
234
235 _initialized = true;
236 }
237
238 #if INCLUDE_CDS
239 void java_lang_String::serialize_offsets(SerializeClosure* f) {
240 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
241 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
242 f->do_bool(&_initialized);
243 }
244 #endif
245
246 class CompactStringsFixup : public FieldClosure {
247 private:
248 bool _value;
249
250 public:
251 CompactStringsFixup(bool value) : _value(value) {}
252
253 void do_field(fieldDescriptor* fd) {
254 if (fd->name() == vmSymbols::compact_strings_name()) {
255 oop mirror = fd->field_holder()->java_mirror();
256 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
257 assert(mirror != nullptr, "String must have mirror already");
258 mirror->bool_field_put(fd->offset(), _value);
259 }
260 }
261 };
262
263 void java_lang_String::set_compact_strings(bool value) {
264 CompactStringsFixup fix(value);
265 vmClasses::String_klass()->do_local_static_fields(&fix);
266 }
267
268 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
269 assert(_initialized, "Must be initialized");
270 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
271
272 // Create the String object first, so there's a chance that the String
273 // and the char array it points to end up in the same cache line.
274 oop obj;
275 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
276
277 // Create the char array. The String object must be handlized here
278 // because GC can happen as a result of the allocation attempt.
279 Handle h_obj(THREAD, obj);
280 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
281 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
282
283 // Point the String at the char array
284 obj = h_obj();
285 set_value(obj, buffer);
286 // No need to zero the offset, allocation zero'ed the entire String object
287 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
288 return h_obj;
289 }
290
291 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
292 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
293 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
294 typeArrayOop buffer = value(h_obj());
295 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
296 if (is_latin1) {
297 for (int index = 0; index < length; index++) {
298 buffer->byte_at_put(index, (jbyte)unicode[index]);
299 }
300 } else {
301 for (int index = 0; index < length; index++) {
302 buffer->char_at_put(index, unicode[index]);
303 }
304 }
305
306 #ifdef ASSERT
307 {
308 ResourceMark rm;
309 size_t utf8_len = static_cast<size_t>(length);
310 char* expected = UNICODE::as_utf8(unicode, utf8_len);
311 char* actual = as_utf8_string(h_obj());
312 if (strcmp(expected, actual) != 0) {
313 fatal("Unicode conversion failure: %s --> %s", expected, actual);
314 }
315 }
316 #endif
317
318 return h_obj;
319 }
320
321 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
322 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
323 return h_obj();
324 }
325
326 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
327 if (utf8_str == nullptr) {
328 return Handle();
329 }
330 bool has_multibyte, is_latin1;
331 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
332 if (!CompactStrings) {
333 has_multibyte = true;
334 is_latin1 = false;
335 }
336
337 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
338 if (length > 0) {
339 if (!has_multibyte) {
340 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
341 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
342 } else if (is_latin1) {
343 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
344 } else {
345 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
346 }
347 }
348
349 #ifdef ASSERT
350 // This check is too strict when the input string is not a valid UTF8.
351 // For example, it may be created with arbitrary content via jni_NewStringUTF.
352 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
353 ResourceMark rm;
354 const char* expected = utf8_str;
355 char* actual = as_utf8_string(h_obj());
356 if (strcmp(expected, actual) != 0) {
357 fatal("String conversion failure: %s --> %s", expected, actual);
358 }
359 }
360 #endif
361
362 return h_obj;
363 }
364
365 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
366 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
367 return h_obj();
368 }
369
370 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
371 const char* utf8_str = (char*)symbol->bytes();
372 int utf8_len = symbol->utf8_length();
373
374 bool has_multibyte, is_latin1;
375 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
376 if (!CompactStrings) {
377 has_multibyte = true;
378 is_latin1 = false;
379 }
380
381 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
382 if (length > 0) {
383 if (!has_multibyte) {
384 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
385 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
386 } else if (is_latin1) {
387 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
388 } else {
389 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
390 }
391 }
392
393 #ifdef ASSERT
394 // This check is too strict on older classfile versions
395 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
396 {
397 ResourceMark rm;
398 const char* expected = symbol->as_utf8();
399 char* actual = as_utf8_string(h_obj());
400 if (strncmp(expected, actual, utf8_len) != 0) {
401 fatal("Symbol conversion failure: %s --> %s", expected, actual);
402 }
403 }
404 #endif
405
406 return h_obj;
407 }
408
409 // Converts a C string to a Java String based on current encoding
410 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
411 assert(str != nullptr, "bad arguments");
412
413 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
414 static to_java_string_fn_t _to_java_string_fn = nullptr;
415
416 if (_to_java_string_fn == nullptr) {
417 void *lib_handle = os::native_java_library();
418 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
419 if (_to_java_string_fn == nullptr) {
420 fatal("JNU_NewStringPlatform missing");
421 }
422 }
423
424 jstring js = nullptr;
425 {
426 JavaThread* thread = THREAD;
427 HandleMark hm(thread);
428 ThreadToNativeFromVM ttn(thread);
429 js = (_to_java_string_fn)(thread->jni_environment(), str);
430 }
431
432 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
433 JNIHandles::destroy_local(js); // destroy local JNIHandle.
434 return native_platform_string;
435 }
436
437 // Converts a Java String to a native C string that can be used for
438 // native OS calls.
439 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
440 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
441 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
442
443 if (_to_platform_string_fn == nullptr) {
444 void *lib_handle = os::native_java_library();
445 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
446 if (_to_platform_string_fn == nullptr) {
447 fatal("GetStringPlatformChars missing");
448 }
449 }
450
451 char *native_platform_string;
452 jstring js;
453 { JavaThread* thread = THREAD;
454 js = (jstring) JNIHandles::make_local(thread, java_string());
455 HandleMark hm(thread);
456 ThreadToNativeFromVM ttn(thread);
457 JNIEnv *env = thread->jni_environment();
458 bool is_copy;
459 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
460 assert(is_copy == JNI_TRUE, "is_copy value changed");
461 }
462
463 // Uses a store barrier and therefore needs to be in vm state
464 JNIHandles::destroy_local(js);
465
466 return native_platform_string;
467 }
468
469 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
470 ResourceMark rm(THREAD);
471 return create_from_str(java_name->as_klass_external_name(), THREAD);
472 }
473
474 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
475 jchar* result = as_unicode_string_or_null(java_string, length);
476 if (result == nullptr) {
477 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
478 }
479 return result;
480 }
481
482 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
483 typeArrayOop value = java_lang_String::value(java_string);
484 length = java_lang_String::length(java_string, value);
485 bool is_latin1 = java_lang_String::is_latin1(java_string);
486
487 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
488 if (result != nullptr) {
489 if (!is_latin1) {
490 for (int index = 0; index < length; index++) {
491 result[index] = value->char_at(index);
492 }
493 } else {
494 for (int index = 0; index < length; index++) {
495 result[index] = ((jchar) value->byte_at(index)) & 0xff;
496 }
497 }
498 }
499 return result;
500 }
501
502 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
503 // The hash and hashIsZero fields are subject to a benign data race,
504 // making it crucial to ensure that any observable result of the
505 // calculation in this method stays correct under any possible read of
506 // these fields. Necessary restrictions to allow this to be correct
507 // without explicit memory fences or similar concurrency primitives is
508 // that we can ever only write to one of these two fields for a given
509 // String instance, and that the computation is idempotent and derived
510 // from immutable state
511 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
512 if (java_lang_String::hash_is_set(java_string)) {
513 return java_string->int_field(_hash_offset);
514 }
515
516 typeArrayOop value = java_lang_String::value(java_string);
517 int length = java_lang_String::length(java_string, value);
518 bool is_latin1 = java_lang_String::is_latin1(java_string);
519
520 unsigned int hash = 0;
521 if (length > 0) {
522 if (is_latin1) {
523 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
524 } else {
525 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
526 }
527 }
528
529 if (update) {
530 if (hash != 0) {
531 java_string->int_field_put(_hash_offset, hash);
532 } else {
533 java_string->bool_field_put(_hashIsZero_offset, true);
534 }
535 }
536 return hash;
537 }
538
539 unsigned int java_lang_String::hash_code(oop java_string) {
540 return hash_code_impl(java_string, /*update=*/true);
541 }
542
543 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
544 return hash_code_impl(java_string, /*update=*/false);
545 }
546
547
548 char* java_lang_String::as_quoted_ascii(oop java_string) {
549 typeArrayOop value = java_lang_String::value(java_string);
550 int length = java_lang_String::length(java_string, value);
551 bool is_latin1 = java_lang_String::is_latin1(java_string);
552
553 if (length == 0) return nullptr;
554
555 char* result;
556 size_t result_length;
557 if (!is_latin1) {
558 jchar* base = value->char_at_addr(0);
559 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
560 result = NEW_RESOURCE_ARRAY(char, result_length);
561 UNICODE::as_quoted_ascii(base, length, result, result_length);
562 } else {
563 jbyte* base = value->byte_at_addr(0);
564 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
565 result = NEW_RESOURCE_ARRAY(char, result_length);
566 UNICODE::as_quoted_ascii(base, length, result, result_length);
567 }
568 assert(result_length >= (size_t)length + 1, "must not be shorter");
569 assert(result_length == strlen(result) + 1, "must match");
570 return result;
571 }
572
573 Symbol* java_lang_String::as_symbol(oop java_string) {
574 typeArrayOop value = java_lang_String::value(java_string);
575 int length = java_lang_String::length(java_string, value);
576 bool is_latin1 = java_lang_String::is_latin1(java_string);
577 if (!is_latin1) {
578 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
579 Symbol* sym = SymbolTable::new_symbol(base, length);
580 return sym;
581 } else {
582 ResourceMark rm;
583 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
584 size_t utf8_len = static_cast<size_t>(length);
585 const char* base = UNICODE::as_utf8(position, utf8_len);
586 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
587 return sym;
588 }
589 }
590
591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
592 typeArrayOop value = java_lang_String::value(java_string);
593 int length = java_lang_String::length(java_string, value);
594 bool is_latin1 = java_lang_String::is_latin1(java_string);
595 if (!is_latin1) {
596 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
597 return SymbolTable::probe_unicode(base, length);
598 } else {
599 ResourceMark rm;
600 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
601 size_t utf8_len = static_cast<size_t>(length);
602 const char* base = UNICODE::as_utf8(position, utf8_len);
603 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
604 }
605 }
606
607 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
608 assert(value_equals(value, java_lang_String::value(java_string)),
609 "value must be same as java_lang_String::value(java_string)");
610 int length = java_lang_String::length(java_string, value);
611 if (length == 0) {
612 return 0;
613 }
614 if (!java_lang_String::is_latin1(java_string)) {
615 return UNICODE::utf8_length(value->char_at_addr(0), length);
616 } else {
617 return UNICODE::utf8_length(value->byte_at_addr(0), length);
618 }
619 }
620
621 size_t java_lang_String::utf8_length(oop java_string) {
622 typeArrayOop value = java_lang_String::value(java_string);
623 return utf8_length(java_string, value);
624 }
625
626 int java_lang_String::utf8_length_as_int(oop java_string) {
627 typeArrayOop value = java_lang_String::value(java_string);
628 return utf8_length_as_int(java_string, value);
629 }
630
631 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
632 assert(value_equals(value, java_lang_String::value(java_string)),
633 "value must be same as java_lang_String::value(java_string)");
634 int length = java_lang_String::length(java_string, value);
635 if (length == 0) {
636 return 0;
637 }
638 if (!java_lang_String::is_latin1(java_string)) {
639 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
640 } else {
641 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
642 }
643 }
644
645 char* java_lang_String::as_utf8_string(oop java_string) {
646 size_t length;
647 return as_utf8_string(java_string, length);
648 }
649
650 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
651 typeArrayOop value = java_lang_String::value(java_string);
652 // `length` is used as the incoming number of characters to
653 // convert, and then set as the number of bytes in the UTF8 sequence.
654 length = java_lang_String::length(java_string, value);
655 bool is_latin1 = java_lang_String::is_latin1(java_string);
656 if (!is_latin1) {
657 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
658 return UNICODE::as_utf8(position, length);
659 } else {
660 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
661 return UNICODE::as_utf8(position, length);
662 }
663 }
664
665 // Uses a provided buffer if it's sufficiently large, otherwise allocates
666 // a resource array to fit
667 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
668 typeArrayOop value = java_lang_String::value(java_string);
669 int len = java_lang_String::length(java_string, value);
670 bool is_latin1 = java_lang_String::is_latin1(java_string);
671 if (!is_latin1) {
672 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
673 utf8_len = UNICODE::utf8_length(position, len);
674 if (utf8_len >= buflen) {
675 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
676 }
677 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
678 } else {
679 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
680 utf8_len = UNICODE::utf8_length(position, len);
681 if (utf8_len >= buflen) {
682 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
683 }
684 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
685 }
686 }
687
688 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
689 assert(value_equals(value, java_lang_String::value(java_string)),
690 "value must be same as java_lang_String::value(java_string)");
691 int length = java_lang_String::length(java_string, value);
692 bool is_latin1 = java_lang_String::is_latin1(java_string);
693 if (!is_latin1) {
694 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
695 return UNICODE::as_utf8(position, length, buf, buflen);
696 } else {
697 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
698 return UNICODE::as_utf8(position, length, buf, buflen);
699 }
700 }
701
702 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
703 typeArrayOop value = java_lang_String::value(java_string);
704 return as_utf8_string(java_string, value, buf, buflen);
705 }
706
707 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
708 // `length` is used as the incoming number of characters to
709 // convert, and then set as the number of bytes in the UTF8 sequence.
710 size_t length = static_cast<size_t>(len);
711 typeArrayOop value = java_lang_String::value(java_string);
712 bool is_latin1 = java_lang_String::is_latin1(java_string);
713 assert(start + len <= java_lang_String::length(java_string), "just checking");
714 if (!is_latin1) {
715 jchar* position = value->char_at_addr(start);
716 return UNICODE::as_utf8(position, length);
717 } else {
718 jbyte* position = value->byte_at_addr(start);
719 return UNICODE::as_utf8(position, length);
720 }
721 }
722
723 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
724 assert(value_equals(value, java_lang_String::value(java_string)),
725 "value must be same as java_lang_String::value(java_string)");
726 assert(start + len <= java_lang_String::length(java_string), "just checking");
727 bool is_latin1 = java_lang_String::is_latin1(java_string);
728 if (!is_latin1) {
729 jchar* position = value->char_at_addr(start);
730 return UNICODE::as_utf8(position, len, buf, buflen);
731 } else {
732 jbyte* position = value->byte_at_addr(start);
733 return UNICODE::as_utf8(position, len, buf, buflen);
734 }
735 }
736
737 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
738 assert(java_string->klass() == vmClasses::String_klass(),
739 "must be java_string");
740 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
741 int length = java_lang_String::length(java_string, value);
742 if (length != len) {
743 return false;
744 }
745 bool is_latin1 = java_lang_String::is_latin1(java_string);
746 if (!is_latin1) {
747 for (int i = 0; i < len; i++) {
748 if (value->char_at(i) != chars[i]) {
749 return false;
750 }
751 }
752 } else {
753 for (int i = 0; i < len; i++) {
754 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
755 return false;
756 }
757 }
758 }
759 return true;
760 }
761
762 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
763 assert(java_string->klass() == vmClasses::String_klass(),
764 "must be java_string");
765 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
766 int length = java_lang_String::length(java_string, value);
767 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
768 if (length != unicode_length) {
769 return false;
770 }
771 bool is_latin1 = java_lang_String::is_latin1(java_string);
772 jchar c;
773 if (!is_latin1) {
774 for (int i = 0; i < unicode_length; i++) {
775 utf8_string = UTF8::next(utf8_string, &c);
776 if (value->char_at(i) != c) {
777 return false;
778 }
779 }
780 } else {
781 for (int i = 0; i < unicode_length; i++) {
782 utf8_string = UTF8::next(utf8_string, &c);
783 if ((((jchar) value->byte_at(i)) & 0xff) != c) {
784 return false;
785 }
786 }
787 }
788 return true;
789 }
790
791 bool java_lang_String::equals(oop str1, oop str2) {
792 assert(str1->klass() == vmClasses::String_klass(),
793 "must be java String");
794 assert(str2->klass() == vmClasses::String_klass(),
795 "must be java String");
796 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
797 bool is_latin1 = java_lang_String::is_latin1(str1);
798 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
799 bool is_latin2 = java_lang_String::is_latin1(str2);
800
801 if (is_latin1 != is_latin2) {
802 // Strings with different coders are never equal.
803 return false;
804 }
805 return value_equals(value1, value2);
806 }
807
808 // Print the given string to the given outputStream, limiting the output to
809 // at most max_length of the string's characters. If the length exceeds the
810 // limit we print an abridged version of the string with the "middle" elided
811 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
812 // it is treated as max_length-1.
813 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
814 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
815 // We need at least two characters to print A ... B
816 assert(max_length > 1, "invalid max_length: %d", max_length);
817
818 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
819
820 if (value == nullptr) {
821 // This can happen if, e.g., printing a String
822 // object before its initializer has been called
823 st->print("nullptr");
824 return;
825 }
826
827 int length = java_lang_String::length(java_string, value);
828 bool is_latin1 = java_lang_String::is_latin1(java_string);
829
830 bool abridge = length > max_length;
831
832 st->print("\"");
833 for (int index = 0; index < length; index++) {
834 // If we need to abridge and we've printed half the allowed characters
835 // then jump to the tail of the string.
836 if (abridge && index >= max_length / 2) {
837 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
838 index = length - (max_length / 2);
839 abridge = false; // only do this once
840 }
841 jchar c = (!is_latin1) ? value->char_at(index) :
842 ((jchar) value->byte_at(index)) & 0xff;
843 if (c < ' ') {
844 st->print("\\x%02X", c); // print control characters e.g. \x0A
845 } else {
846 st->print("%c", c);
847 }
848 }
849 st->print("\"");
850
851 if (length > max_length) {
852 st->print(" (abridged) ");
853 }
854 }
855
856 // java_lang_Class
857
858 int java_lang_Class::_klass_offset;
859 int java_lang_Class::_array_klass_offset;
860 int java_lang_Class::_oop_size_offset;
861 int java_lang_Class::_static_oop_field_count_offset;
862 int java_lang_Class::_class_loader_offset;
863 int java_lang_Class::_module_offset;
864 int java_lang_Class::_protection_domain_offset;
865 int java_lang_Class::_component_mirror_offset;
866 int java_lang_Class::_init_lock_offset;
867 int java_lang_Class::_signers_offset;
868 int java_lang_Class::_name_offset;
869 int java_lang_Class::_source_file_offset;
870 int java_lang_Class::_classData_offset;
871 int java_lang_Class::_classRedefinedCount_offset;
872 int java_lang_Class::_reflectionData_offset;
873 int java_lang_Class::_modifiers_offset;
874 int java_lang_Class::_is_primitive_offset;
875
876 bool java_lang_Class::_offsets_computed = false;
877 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
878 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
879
880 #ifdef ASSERT
881 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
882 assert(fd->has_initial_value(), "caller should have checked this");
883 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
884 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
885 }
886 #endif
887
888 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
889 DEBUG_ONLY(assert_valid_static_string_field(fd);)
890 oop string = fd->string_initial_value(CHECK);
891 mirror()->obj_field_put(fd->offset(), string);
892 }
893
894 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
895 assert(fd->has_initial_value(), "caller should have checked this");
896 BasicType t = fd->field_type();
897 switch (t) {
898 case T_BYTE:
899 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
900 break;
901 case T_BOOLEAN:
902 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
903 break;
904 case T_CHAR:
905 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
906 break;
907 case T_SHORT:
908 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
909 break;
910 case T_INT:
911 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
912 break;
913 case T_FLOAT:
914 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
915 break;
916 case T_DOUBLE:
917 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
918 break;
919 case T_LONG:
920 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
921 break;
922 default:
923 // Illegal ConstantValue attribute in class file should have been
924 // caught during classfile parsing.
925 ShouldNotReachHere();
926 }
927 }
928
929 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
930 assert(mirror.not_null() && fd->is_static(), "just checking");
931 if (fd->has_initial_value()) {
932 if (fd->field_type() != T_OBJECT) {
933 initialize_static_primitive_field(fd, mirror);
934 } else {
935 initialize_static_string_field(fd, mirror, CHECK);
936 }
937 }
938 }
939
940 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
941 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
942
943 // If the offset was read from the shared archive, it was fixed up already
944 if (!k->is_shared()) {
945 if (k->is_instance_klass()) {
946 // During bootstrap, java.lang.Class wasn't loaded so static field
947 // offsets were computed without the size added it. Go back and
948 // update all the static field offsets to included the size.
949
950 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
951 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
952 // static fields offsets are updated in this array before reencoding everything into
953 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
954
955 int java_fields;
956 int injected_fields;
957 InstanceKlass* ik = InstanceKlass::cast(k);
958 GrowableArray<FieldInfo>* fields =
959 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
960 &java_fields, &injected_fields);
961 for (int i = 0; i < fields->length(); i++) {
962 FieldInfo* fi = fields->adr_at(i);
963 if (fi->access_flags().is_static()) {
964 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
965 }
966 }
967 Array<u1>* old_stream = ik->fieldinfo_stream();
968 assert(fields->length() == (java_fields + injected_fields), "Must be");
969 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
970 ik->set_fieldinfo_stream(new_fis);
971 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
972 }
973 }
974
975 if (k->is_shared() && k->has_archived_mirror_index()) {
976 if (ArchiveHeapLoader::is_in_use()) {
977 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
978 assert(present, "Missing archived mirror for %s", k->external_name());
979 return;
980 } else {
981 k->clear_java_mirror_handle();
982 k->clear_archived_mirror_index();
983 }
984 }
985 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
986 }
987
988 void java_lang_Class::initialize_mirror_fields(Klass* k,
989 Handle mirror,
990 Handle protection_domain,
991 Handle classData,
992 TRAPS) {
993 // Allocate a simple java object for a lock.
994 // This needs to be a java object because during class initialization
995 // it can be held across a java call.
996 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
997 set_init_lock(mirror(), r);
998
999 // Set protection domain also
1000 set_protection_domain(mirror(), protection_domain());
1001
1002 // Initialize static fields
1003 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1004
1005 // Set classData
1006 set_class_data(mirror(), classData());
1007 }
1008
1009 // Set the java.lang.Module module field in the java_lang_Class mirror
1010 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1011 if (module.is_null()) {
1012 // During startup, the module may be null only if java.base has not been defined yet.
1013 // Put the class on the fixup_module_list to patch later when the java.lang.Module
1014 // for java.base is known. But note that since we captured the null module another
1015 // thread may have completed that initialization.
1016
1017 bool javabase_was_defined = false;
1018 {
1019 MutexLocker m1(current, Module_lock);
1020 // Keep list of classes needing java.base module fixup
1021 if (!ModuleEntryTable::javabase_defined()) {
1022 assert(k->java_mirror() != nullptr, "Class's mirror is null");
1023 k->class_loader_data()->inc_keep_alive_ref_count();
1024 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1025 fixup_module_field_list()->push(k);
1026 } else {
1027 javabase_was_defined = true;
1028 }
1029 }
1030
1031 // If java.base was already defined then patch this particular class with java.base.
1032 if (javabase_was_defined) {
1033 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1034 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
1035 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1036 Handle javabase_handle(current, javabase_entry->module());
1037 set_module(mirror(), javabase_handle());
1038 }
1039 } else {
1040 assert(Universe::is_module_initialized() ||
1041 (ModuleEntryTable::javabase_defined() &&
1042 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
1043 "Incorrect java.lang.Module specification while creating mirror");
1044 set_module(mirror(), module());
1045 }
1046 }
1047
1048 // Statically allocate fixup lists because they always get created.
1049 void java_lang_Class::allocate_fixup_lists() {
1050 GrowableArray<Klass*>* mirror_list =
1051 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1052 set_fixup_mirror_list(mirror_list);
1053
1054 GrowableArray<Klass*>* module_list =
1055 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1056 set_fixup_module_field_list(module_list);
1057 }
1058
1059 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1060 Handle& mirror, Handle& comp_mirror, TRAPS) {
1061 // Allocate mirror (java.lang.Class instance)
1062 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1063 mirror = Handle(THREAD, mirror_oop);
1064
1065 // Setup indirection from mirror->klass
1066 set_klass(mirror(), k);
1067
1068 // Set the modifiers flag.
1069 u2 computed_modifiers = k->compute_modifier_flags();
1070 set_modifiers(mirror(), computed_modifiers);
1071
1072 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1073 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1074
1075 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1076
1077 // It might also have a component mirror. This mirror must already exist.
1078 if (k->is_array_klass()) {
1079 if (k->is_typeArray_klass()) {
1080 BasicType type = TypeArrayKlass::cast(k)->element_type();
1081 if (is_scratch) {
1082 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1083 } else {
1084 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1085 }
1086 } else {
1087 assert(k->is_objArray_klass(), "Must be");
1088 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1089 assert(element_klass != nullptr, "Must have an element klass");
1090 if (is_scratch) {
1091 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1092 } else {
1093 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1094 }
1095 }
1096 assert(comp_mirror() != nullptr, "must have a mirror");
1097
1098 // Two-way link between the array klass and its component mirror:
1099 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1100 set_component_mirror(mirror(), comp_mirror());
1101 // See below for ordering dependencies between field array_klass in component mirror
1102 // and java_mirror in this klass.
1103 } else {
1104 assert(k->is_instance_klass(), "Must be");
1105
1106 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1107 if (HAS_PENDING_EXCEPTION) {
1108 // If any of the fields throws an exception like OOM remove the klass field
1109 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1110 // This mirror looks like a primitive type, which logically it is because it
1111 // it represents no class.
1112 set_klass(mirror(), nullptr);
1113 return;
1114 }
1115 }
1116 }
1117
1118 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1119 Handle module, Handle protection_domain,
1120 Handle classData, TRAPS) {
1121 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1122 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1123
1124 // Class_klass has to be loaded because it is used to allocate
1125 // the mirror.
1126 if (vmClasses::Class_klass_loaded()) {
1127 Handle mirror;
1128 Handle comp_mirror;
1129
1130 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1131
1132 // set the classLoader field in the java_lang_Class instance
1133 assert(class_loader() == k->class_loader(), "should be same");
1134 set_class_loader(mirror(), class_loader());
1135
1136 // Setup indirection from klass->mirror
1137 // after any exceptions can happen during allocations.
1138 k->set_java_mirror(mirror);
1139
1140 // Set the module field in the java_lang_Class instance. This must be done
1141 // after the mirror is set.
1142 set_mirror_module_field(THREAD, k, mirror, module);
1143
1144 if (comp_mirror() != nullptr) {
1145 // Set after k->java_mirror() is published, because compiled code running
1146 // concurrently doesn't expect a k to have a null java_mirror.
1147 release_set_array_klass(comp_mirror(), k);
1148 }
1149 if (CDSConfig::is_dumping_heap()) {
1150 create_scratch_mirror(k, CHECK);
1151 }
1152 } else {
1153 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1154 fixup_mirror_list()->push(k);
1155 }
1156 }
1157
1158 #if INCLUDE_CDS_JAVA_HEAP
1159 // The "scratch mirror" stores the states of the mirror object that can be
1160 // decided at dump time (such as the initial values of the static fields, the
1161 // component mirror, etc). At runtime, more information is added to it by
1162 // java_lang_Class::restore_archived_mirror().
1163 //
1164 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1165 // produces the same result as /*runtime*/create_mirror().
1166 //
1167 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1168 // latter may contain dumptime-specific information that cannot be archived
1169 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1170 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1171 if (k->class_loader() != nullptr &&
1172 k->class_loader() != SystemDictionary::java_platform_loader() &&
1173 k->class_loader() != SystemDictionary::java_system_loader()) {
1174 // We only archive the mirrors of classes loaded by the built-in loaders
1175 return;
1176 }
1177
1178 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1179 Handle mirror;
1180 Handle comp_mirror;
1181 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1182
1183 if (comp_mirror() != nullptr) {
1184 release_set_array_klass(comp_mirror(), k);
1185 }
1186
1187 HeapShared::set_scratch_java_mirror(k, mirror());
1188 }
1189
1190 // Returns true if the mirror is updated, false if no archived mirror
1191 // data is present. After the archived mirror object is restored, the
1192 // shared klass' _has_raw_archived_mirror flag is cleared.
1193 bool java_lang_Class::restore_archived_mirror(Klass *k,
1194 Handle class_loader, Handle module,
1195 Handle protection_domain, TRAPS) {
1196 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1197 // see more details in vmClasses::resolve_all().
1198 if (!vmClasses::Class_klass_loaded()) {
1199 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1200 fixup_mirror_list()->push(k);
1201 return true;
1202 }
1203
1204 oop m = k->archived_java_mirror();
1205 assert(m != nullptr, "must have stored non-null archived mirror");
1206
1207 // Sanity: clear it now to prevent re-initialization if any of the following fails
1208 k->clear_archived_mirror_index();
1209
1210 // mirror is archived, restore
1211 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1212 assert(as_Klass(m) == k, "must be");
1213 Handle mirror(THREAD, m);
1214
1215 if (!k->is_array_klass()) {
1216 // - local static final fields with initial values were initialized at dump time
1217
1218 // create the init_lock
1219 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1220 set_init_lock(mirror(), r);
1221
1222 if (protection_domain.not_null()) {
1223 set_protection_domain(mirror(), protection_domain());
1224 }
1225 }
1226
1227 assert(class_loader() == k->class_loader(), "should be same");
1228 if (class_loader.not_null()) {
1229 set_class_loader(mirror(), class_loader());
1230 }
1231
1232 k->set_java_mirror(mirror);
1233
1234 set_mirror_module_field(THREAD, k, mirror, module);
1235
1236 if (log_is_enabled(Trace, cds, heap, mirror)) {
1237 ResourceMark rm(THREAD);
1238 log_trace(cds, heap, mirror)(
1239 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1240 }
1241
1242 return true;
1243 }
1244 #endif // INCLUDE_CDS_JAVA_HEAP
1245
1246 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1247 assert(_module_offset != 0, "must have been computed already");
1248 set_module(k->java_mirror(), module());
1249 }
1250
1251 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1252 assert(_oop_size_offset != 0, "must be set");
1253 assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1254 assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1255 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1256 }
1257
1258 int java_lang_Class::static_oop_field_count(oop java_class) {
1259 assert(_static_oop_field_count_offset != 0, "must be set");
1260 return java_class->int_field(_static_oop_field_count_offset);
1261 }
1262
1263 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1264 assert(_static_oop_field_count_offset != 0, "must be set");
1265 java_class->int_field_put(_static_oop_field_count_offset, size);
1266 }
1267
1268 oop java_lang_Class::protection_domain(oop java_class) {
1269 assert(_protection_domain_offset != 0, "must be set");
1270 return java_class->obj_field(_protection_domain_offset);
1271 }
1272 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1273 assert(_protection_domain_offset != 0, "must be set");
1274 java_class->obj_field_put(_protection_domain_offset, pd);
1275 }
1276
1277 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1278 assert(_component_mirror_offset != 0, "must be set");
1279 assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1280 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1281 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1282 }
1283
1284 oop java_lang_Class::component_mirror(oop java_class) {
1285 assert(_component_mirror_offset != 0, "must be set");
1286 return java_class->obj_field(_component_mirror_offset);
1287 }
1288
1289 oop java_lang_Class::init_lock(oop java_class) {
1290 assert(_init_lock_offset != 0, "must be set");
1291 return java_class->obj_field(_init_lock_offset);
1292 }
1293 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1294 assert(_init_lock_offset != 0, "must be set");
1295 java_class->obj_field_put(_init_lock_offset, init_lock);
1296 }
1297
1298 objArrayOop java_lang_Class::signers(oop java_class) {
1299 assert(_signers_offset != 0, "must be set");
1300 return (objArrayOop)java_class->obj_field(_signers_offset);
1301 }
1302
1303 oop java_lang_Class::class_data(oop java_class) {
1304 assert(_classData_offset != 0, "must be set");
1305 return java_class->obj_field(_classData_offset);
1306 }
1307 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1308 assert(_classData_offset != 0, "must be set");
1309 java_class->obj_field_put(_classData_offset, class_data);
1310 }
1311
1312 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1313 assert(_reflectionData_offset != 0, "must be set");
1314 java_class->obj_field_put(_reflectionData_offset, reflection_data);
1315 }
1316
1317 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1318 assert(_class_loader_offset != 0, "offsets should have been initialized");
1319 java_class->obj_field_put(_class_loader_offset, loader);
1320 }
1321
1322 oop java_lang_Class::class_loader(oop java_class) {
1323 assert(_class_loader_offset != 0, "must be set");
1324 return java_class->obj_field(_class_loader_offset);
1325 }
1326
1327 oop java_lang_Class::module(oop java_class) {
1328 assert(_module_offset != 0, "must be set");
1329 return java_class->obj_field(_module_offset);
1330 }
1331
1332 void java_lang_Class::set_module(oop java_class, oop module) {
1333 assert(_module_offset != 0, "must be set");
1334 java_class->obj_field_put(_module_offset, module);
1335 }
1336
1337 oop java_lang_Class::name(Handle java_class, TRAPS) {
1338 assert(_name_offset != 0, "must be set");
1339 oop o = java_class->obj_field(_name_offset);
1340 if (o == nullptr) {
1341 o = StringTable::intern(as_external_name(java_class()), THREAD);
1342 java_class->obj_field_put(_name_offset, o);
1343 }
1344 return o;
1345 }
1346
1347 oop java_lang_Class::source_file(oop java_class) {
1348 assert(_source_file_offset != 0, "must be set");
1349 return java_class->obj_field(_source_file_offset);
1350 }
1351
1352 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1353 assert(_source_file_offset != 0, "must be set");
1354 java_class->obj_field_put(_source_file_offset, source_file);
1355 }
1356
1357 void java_lang_Class::set_is_primitive(oop java_class) {
1358 assert(_is_primitive_offset != 0, "must be set");
1359 java_class->bool_field_put(_is_primitive_offset, true);
1360 }
1361
1362
1363 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1364 // Mirrors for basic types have a null klass field, which makes them special.
1365 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1366 if (type != T_VOID) {
1367 Klass* aklass = Universe::typeArrayKlass(type);
1368 assert(aklass != nullptr, "correct bootstrap");
1369 release_set_array_klass(java_class, aklass);
1370 }
1371 #ifdef ASSERT
1372 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1373 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1374 #endif
1375 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1376 set_is_primitive(java_class);
1377 return java_class;
1378 }
1379
1380 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1381 assert(is_instance(java_class), "must be a Class object");
1382 java_class->metadata_field_put(_klass_offset, klass);
1383 }
1384
1385
1386 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1387 assert(is_instance(java_class), "must be a Class object");
1388 Symbol* name = nullptr;
1389 bool is_instance = false;
1390 if (is_primitive(java_class)) {
1391 name = vmSymbols::type_signature(primitive_type(java_class));
1392 } else {
1393 Klass* k = as_Klass(java_class);
1394 is_instance = k->is_instance_klass();
1395 name = k->name();
1396 }
1397 if (name == nullptr) {
1398 st->print("<null>");
1399 return;
1400 }
1401 if (is_instance) st->print("L");
1402 st->write((char*) name->base(), (int) name->utf8_length());
1403 if (is_instance) st->print(";");
1404 }
1405
1406 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1407 assert(is_instance(java_class), "must be a Class object");
1408 Symbol* name;
1409 if (is_primitive(java_class)) {
1410 name = vmSymbols::type_signature(primitive_type(java_class));
1411 // Because this can create a new symbol, the caller has to decrement
1412 // the refcount, so make adjustment here and below for symbols returned
1413 // that are not created or incremented due to a successful lookup.
1414 name->increment_refcount();
1415 } else {
1416 Klass* k = as_Klass(java_class);
1417 if (!k->is_instance_klass()) {
1418 name = k->name();
1419 name->increment_refcount();
1420 } else {
1421 ResourceMark rm;
1422 const char* sigstr = k->signature_name();
1423 int siglen = (int) strlen(sigstr);
1424 if (!intern_if_not_found) {
1425 name = SymbolTable::probe(sigstr, siglen);
1426 } else {
1427 name = SymbolTable::new_symbol(sigstr, siglen);
1428 }
1429 }
1430 }
1431 return name;
1432 }
1433
1434 // Returns the Java name for this Java mirror (Resource allocated)
1435 // See Klass::external_name().
1436 // For primitive type Java mirrors, its type name is returned.
1437 const char* java_lang_Class::as_external_name(oop java_class) {
1438 assert(is_instance(java_class), "must be a Class object");
1439 const char* name = nullptr;
1440 if (is_primitive(java_class)) {
1441 name = type2name(primitive_type(java_class));
1442 } else {
1443 name = as_Klass(java_class)->external_name();
1444 }
1445 if (name == nullptr) {
1446 name = "<null>";
1447 }
1448 return name;
1449 }
1450
1451 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1452 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1453 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1454 return k;
1455 }
1456
1457
1458 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1459 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1460 java_class->release_metadata_field_put(_array_klass_offset, klass);
1461 }
1462
1463
1464 BasicType java_lang_Class::primitive_type(oop java_class) {
1465 assert(is_primitive(java_class), "just checking");
1466 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1467 BasicType type = T_VOID;
1468 if (ak != nullptr) {
1469 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1470 type = ArrayKlass::cast(ak)->element_type();
1471 } else {
1472 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1473 }
1474 #ifdef ASSERT
1475 if (CDSConfig::is_dumping_heap()) {
1476 oop mirror = Universe::java_mirror(type);
1477 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1478 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1479 } else {
1480 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1481 }
1482 #endif
1483 return type;
1484 }
1485
1486 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1487 assert(is_instance(java_class), "must be a Class object");
1488 if (is_primitive(java_class)) {
1489 if (reference_klass != nullptr)
1490 (*reference_klass) = nullptr;
1491 return primitive_type(java_class);
1492 } else {
1493 if (reference_klass != nullptr)
1494 (*reference_klass) = as_Klass(java_class);
1495 return T_OBJECT;
1496 }
1497 }
1498
1499
1500 oop java_lang_Class::primitive_mirror(BasicType t) {
1501 oop mirror = Universe::java_mirror(t);
1502 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1503 assert(is_primitive(mirror), "must be primitive");
1504 return mirror;
1505 }
1506
1507 #define CLASS_FIELDS_DO(macro) \
1508 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1509 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1510 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1511 macro(_module_offset, k, "module", module_signature, false); \
1512 macro(_name_offset, k, "name", string_signature, false); \
1513 macro(_classData_offset, k, "classData", object_signature, false); \
1514 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \
1515 macro(_signers_offset, k, "signers", object_array_signature, false); \
1516 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \
1517 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \
1518 macro(_is_primitive_offset, k, "primitive", bool_signature, false);
1519
1520 void java_lang_Class::compute_offsets() {
1521 if (_offsets_computed) {
1522 return;
1523 }
1524
1525 _offsets_computed = true;
1526
1527 InstanceKlass* k = vmClasses::Class_klass();
1528 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1529 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1530 }
1531
1532 #if INCLUDE_CDS
1533 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1534 f->do_bool(&_offsets_computed);
1535
1536 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1537
1538 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1539 }
1540 #endif
1541
1542 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1543 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1544 return the_class_mirror->int_field(_classRedefinedCount_offset);
1545 }
1546
1547 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1548 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1549 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1550 }
1551
1552 int java_lang_Class::modifiers(oop the_class_mirror) {
1553 assert(_modifiers_offset != 0, "offsets should have been initialized");
1554 return the_class_mirror->char_field(_modifiers_offset);
1555 }
1556
1557 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1558 assert(_modifiers_offset != 0, "offsets should have been initialized");
1559 the_class_mirror->char_field_put(_modifiers_offset, value);
1560 }
1561
1562
1563 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1564 // platform thread structure, and a eetop offset which was used for thread
1565 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1566 // merged, so in the HotSpot VM we just use the eetop field for the thread
1567 // instead of the privateInfo_offset.
1568 //
1569 // Note: The stackSize field is only present starting in 1.4.
1570
1571 int java_lang_Thread_FieldHolder::_group_offset;
1572 int java_lang_Thread_FieldHolder::_priority_offset;
1573 int java_lang_Thread_FieldHolder::_stackSize_offset;
1574 int java_lang_Thread_FieldHolder::_daemon_offset;
1575 int java_lang_Thread_FieldHolder::_thread_status_offset;
1576
1577 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1578 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1579 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1580 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1581 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1582 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1583
1584 void java_lang_Thread_FieldHolder::compute_offsets() {
1585 assert(_group_offset == 0, "offsets should be initialized only once");
1586
1587 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1588 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1589 }
1590
1591 #if INCLUDE_CDS
1592 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1593 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1594 }
1595 #endif
1596
1597 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1598 return holder->obj_field(_group_offset);
1599 }
1600
1601 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1602 return (ThreadPriority)holder->int_field(_priority_offset);
1603 }
1604
1605 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1606 holder->int_field_put(_priority_offset, priority);
1607 }
1608
1609 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1610 return holder->long_field(_stackSize_offset);
1611 }
1612
1613 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1614 return holder->bool_field(_daemon_offset) != 0;
1615 }
1616
1617 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1618 assert(val, "daemon status is never turned off");
1619 holder->bool_field_put(_daemon_offset, val);
1620 }
1621
1622 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1623 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1624 }
1625
1626 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1627 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1628 }
1629
1630
1631 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1632
1633 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1634 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1635
1636 void java_lang_Thread_Constants::compute_offsets() {
1637 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1638
1639 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1640 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1641 }
1642
1643 #if INCLUDE_CDS
1644 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1645 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1646 }
1647 #endif
1648
1649 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1650 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1651 oop base = k->static_field_base_raw();
1652 return base->obj_field(_static_VTHREAD_GROUP_offset);
1653 }
1654
1655
1656 int java_lang_Thread::_holder_offset;
1657 int java_lang_Thread::_name_offset;
1658 int java_lang_Thread::_contextClassLoader_offset;
1659 int java_lang_Thread::_eetop_offset;
1660 int java_lang_Thread::_jvmti_thread_state_offset;
1661 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1662 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1663 int java_lang_Thread::_interrupted_offset;
1664 int java_lang_Thread::_interruptLock_offset;
1665 int java_lang_Thread::_tid_offset;
1666 int java_lang_Thread::_continuation_offset;
1667 int java_lang_Thread::_park_blocker_offset;
1668 int java_lang_Thread::_scopedValueBindings_offset;
1669 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1670
1671 #define THREAD_FIELDS_DO(macro) \
1672 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1673 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1674 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1675 macro(_eetop_offset, k, "eetop", long_signature, false); \
1676 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1677 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1678 macro(_tid_offset, k, "tid", long_signature, false); \
1679 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1680 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1681 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1682
1683 void java_lang_Thread::compute_offsets() {
1684 assert(_holder_offset == 0, "offsets should be initialized only once");
1685
1686 InstanceKlass* k = vmClasses::Thread_klass();
1687 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1688 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1689 }
1690
1691 #if INCLUDE_CDS
1692 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1693 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1694 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1695 }
1696 #endif
1697
1698 JavaThread* java_lang_Thread::thread(oop java_thread) {
1699 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1700 }
1701
1702 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1703 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1704 }
1705
1706 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1707 java_thread->address_field_put(_eetop_offset, (address)thread);
1708 }
1709
1710 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1711 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1712 }
1713
1714 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1715 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1716 }
1717
1718 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1719 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1720 }
1721
1722 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1723 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1724 }
1725
1726 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1727 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1728 int val = VTMS_transition_disable_count(java_thread);
1729 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1730 }
1731
1732 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1733 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1734 int val = VTMS_transition_disable_count(java_thread);
1735 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1736 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1737 }
1738
1739 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1740 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1741 }
1742
1743 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1744 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1745 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1746 }
1747
1748 int java_lang_Thread::is_in_VTMS_transition_offset() {
1749 return _jvmti_is_in_VTMS_transition_offset;
1750 }
1751
1752 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1753 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1754 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1755 }
1756
1757 oop java_lang_Thread::holder(oop java_thread) {
1758 // Note: may return null if the thread is still attaching
1759 return java_thread->obj_field(_holder_offset);
1760 }
1761 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1762 return java_thread->obj_field(_interruptLock_offset);
1763 }
1764
1765 bool java_lang_Thread::interrupted(oop java_thread) {
1766 // Make sure the caller can safely access oops.
1767 assert(Thread::current()->is_VM_thread() ||
1768 (JavaThread::current()->thread_state() != _thread_blocked &&
1769 JavaThread::current()->thread_state() != _thread_in_native),
1770 "Unsafe access to oop");
1771 return java_thread->bool_field_volatile(_interrupted_offset);
1772 }
1773
1774 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1775 // Make sure the caller can safely access oops.
1776 assert(Thread::current()->is_VM_thread() ||
1777 (JavaThread::current()->thread_state() != _thread_blocked &&
1778 JavaThread::current()->thread_state() != _thread_in_native),
1779 "Unsafe access to oop");
1780 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1781 }
1782
1783
1784 oop java_lang_Thread::name(oop java_thread) {
1785 return java_thread->obj_field(_name_offset);
1786 }
1787
1788
1789 void java_lang_Thread::set_name(oop java_thread, oop name) {
1790 java_thread->obj_field_put(_name_offset, name);
1791 }
1792
1793 // Convenience macros for setting and getting Thread fields that
1794 // are actually stored in the FieldHolder object of the thread.
1795 // The FieldHolder can be null whilst a thread is attaching via
1796 // JNI, and when the main thread is attaching.
1797
1798 // The default value should be the default/zero initialized value
1799 // of the field as it would be in java.lang.Thread.FieldHolder.
1800 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1801 { \
1802 oop holder = java_lang_Thread::holder(java_thread); \
1803 if (holder != nullptr) \
1804 return java_lang_Thread_FieldHolder::field(holder); \
1805 else \
1806 return default_val; \
1807 }
1808
1809 // We should never be trying to set a field of an attaching thread.
1810 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1811 { \
1812 oop holder = java_lang_Thread::holder(java_thread); \
1813 assert(holder != nullptr, "Thread not fully initialized"); \
1814 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1815 }
1816
1817
1818 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1819 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1820 }
1821
1822
1823 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1824 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1825 }
1826
1827
1828 oop java_lang_Thread::threadGroup(oop java_thread) {
1829 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1830 }
1831
1832
1833 bool java_lang_Thread::is_alive(oop java_thread) {
1834 JavaThread* thr = java_lang_Thread::thread(java_thread);
1835 return (thr != nullptr);
1836 }
1837
1838
1839 bool java_lang_Thread::is_daemon(oop java_thread) {
1840 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1841 }
1842
1843
1844 void java_lang_Thread::set_daemon(oop java_thread) {
1845 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1846 }
1847
1848 oop java_lang_Thread::context_class_loader(oop java_thread) {
1849 return java_thread->obj_field(_contextClassLoader_offset);
1850 }
1851
1852
1853 jlong java_lang_Thread::stackSize(oop java_thread) {
1854 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1855 }
1856
1857 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1858 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1859 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1860 }
1861
1862 // Read thread status value from threadStatus field in java.lang.Thread java class.
1863 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1864 // Make sure the caller is operating on behalf of the VM or is
1865 // running VM code (state == _thread_in_vm).
1866 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1867 JavaThread::current()->thread_state() == _thread_in_vm,
1868 "Java Thread is not running in vm");
1869 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1870 }
1871
1872 ByteSize java_lang_Thread::thread_id_offset() {
1873 return in_ByteSize(_tid_offset);
1874 }
1875
1876 oop java_lang_Thread::park_blocker(oop java_thread) {
1877 return java_thread->obj_field_acquire(_park_blocker_offset);
1878 }
1879
1880 struct LockInfo {
1881 enum { // should be synced with jdk.internal.vm.ThreadSnapshot.ThreadLock constants
1882 PARKING_TO_WAIT = 0,
1883 ELIMINATED_SCALAR_REPLACED = 1,
1884 ELIMINATED_MONITOR = 2,
1885 LOCKED = 3,
1886 WAITING_TO_LOCK = 4,
1887 WAITING_ON = 5,
1888 WAITING_TO_RELOCK = 6,
1889 OWNABLE_SYNCHRONIZER = 7,
1890 };
1891
1892 int _depth;
1893 int _type;
1894 oop _obj;
1895
1896 LockInfo(int depth, int type, oop obj) : _depth(depth), _type(type), _obj(obj) {}
1897 LockInfo() : _depth(0), _type(0), _obj(nullptr) {}
1898 };
1899
1900 class GetThreadSnapshotClosure : public HandshakeClosure {
1901 public:
1902 Handle _java_thread;
1903 JavaThread* _thread;
1904 int _depth;
1905 bool _retry_handshake;
1906 GrowableArray<Method*>* _methods;
1907 GrowableArray<int>* _bcis;
1908 JavaThreadStatus _thread_status;
1909 oop _name;
1910 bool _with_locks;
1911 bool _found_first_lock;
1912 GrowableArray<LockInfo>* _locks;
1913
1914 GetThreadSnapshotClosure(Handle java_thread, JavaThread* thread, bool with_locks) :
1915 HandshakeClosure("GetThreadSnapshotClosure"), _java_thread(java_thread), _thread(thread),
1916 _depth(0), _retry_handshake(false),
1917 _methods(nullptr), _bcis(nullptr),
1918 _thread_status(), _name(nullptr),
1919 _with_locks(with_locks), _found_first_lock(false), _locks(nullptr) { }
1920 virtual ~GetThreadSnapshotClosure() {
1921 delete _methods;
1922 delete _bcis;
1923 if (_locks != nullptr) {
1924 delete _locks;
1925 }
1926 }
1927
1928 bool read_reset_retry() {
1929 bool ret = _retry_handshake;
1930 // If we re-execute the handshake this method need to return false
1931 // when the handshake cannot be performed. (E.g. thread terminating)
1932 _retry_handshake = false;
1933 return ret;
1934 }
1935
1936 void detect_locks(javaVFrame* jvf, int depth) {
1937 Thread* current = Thread::current();
1938
1939 if (depth == 0 && !_found_first_lock) {
1940 // See javaVFrame::print_lock_info_on() for some other cases:
1941 // "waiting to re-lock in wait", "waiting on the Class initialization monitor".
1942
1943 // If this is the first frame and it is java.lang.Object.wait(...)
1944 // then print out the receiver.
1945 if (jvf->method()->name() == vmSymbols::wait_name() &&
1946 jvf->method()->method_holder()->name() == vmSymbols::java_lang_Object()) {
1947 StackValueCollection* locs = jvf->locals();
1948 if (locs->is_empty()) {
1949 _locks->push(LockInfo(depth, LockInfo::WAITING_ON, nullptr));
1950 } else {
1951 int type = LockInfo::WAITING_ON;
1952 StackValue* sv = locs->at(0);
1953 if (sv->type() == T_OBJECT) {
1954 Handle o = locs->at(0)->get_obj();
1955 if (_thread_status == JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER) {
1956 type = LockInfo::WAITING_TO_RELOCK;;
1957 }
1958 _locks->push(LockInfo(depth, type, o()));
1959 }
1960 }
1961 _found_first_lock = true;
1962 } else {
1963 oop park_blocker = java_lang_Thread::park_blocker(_java_thread());
1964 if (park_blocker != nullptr) {
1965 _locks->push(LockInfo(depth, LockInfo::PARKING_TO_WAIT, park_blocker));
1966 if (park_blocker->is_a(vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass())) {
1967 oop owner = java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(park_blocker);
1968 if (owner != nullptr) {
1969 _locks->push(LockInfo(depth, LockInfo::OWNABLE_SYNCHRONIZER, owner));
1970 }
1971 }
1972 _found_first_lock = true;
1973 }
1974 }
1975 }
1976
1977 GrowableArray<MonitorInfo*>* mons = jvf->monitors();
1978 if (!mons->is_empty()) {
1979 for (int index = (mons->length() - 1); index >= 0; index--) {
1980 MonitorInfo* monitor = mons->at(index);
1981 if (monitor->eliminated() && jvf->is_compiled_frame()) { // Eliminated in compiled code
1982 if (monitor->owner_is_scalar_replaced()) {
1983 Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
1984 _locks->push(LockInfo(depth, LockInfo::ELIMINATED_SCALAR_REPLACED, k->klass_holder()));
1985 } else {
1986 Handle obj(current, monitor->owner());
1987 if (obj() != nullptr) {
1988 _locks->push(LockInfo(depth, LockInfo::ELIMINATED_MONITOR, obj()));
1989 }
1990 }
1991 continue;
1992 }
1993 if (monitor->owner() != nullptr) {
1994 // the monitor is associated with an object, i.e., it is locked
1995 int type = LockInfo::LOCKED;
1996
1997 if (depth == 0 && !_found_first_lock) {
1998 ObjectMonitor* pending_moninor = java_lang_VirtualThread::is_instance(_java_thread())
1999 ? java_lang_VirtualThread::current_pending_monitor(_java_thread())
2000 : jvf->thread()->current_pending_monitor();
2001
2002 markWord mark = monitor->owner()->mark();
2003 // The first stage of async deflation does not affect any field
2004 // used by this comparison so the ObjectMonitor* is usable here.
2005 if (mark.has_monitor()) {
2006 ObjectMonitor* mon = ObjectSynchronizer::read_monitor(current, monitor->owner(), mark);
2007 if (// if the monitor is null we must be in the process of locking
2008 mon == nullptr ||
2009 // we have marked ourself as pending on this monitor
2010 mon == pending_moninor ||
2011 // we are not the owner of this monitor
2012 (_thread != nullptr && !mon->is_entered(_thread))) {
2013 type = LockInfo::WAITING_TO_LOCK;
2014 }
2015 }
2016 }
2017 _locks->push(LockInfo(depth, type, monitor->owner()));
2018
2019 _found_first_lock = true;
2020 }
2021 }
2022 }
2023 }
2024
2025 void do_thread(Thread* th) override {
2026 if (!Thread::current()->is_Java_thread()) {
2027 _retry_handshake = true;
2028 return;
2029 }
2030
2031 bool is_virtual = java_lang_VirtualThread::is_instance(_java_thread());
2032 if (_thread != nullptr) {
2033 if (is_virtual) {
2034 // mounted vthread, use carrier thread state
2035 oop carrier_thread = java_lang_VirtualThread::carrier_thread(_java_thread());
2036 _thread_status = java_lang_Thread::get_thread_status(carrier_thread);
2037 } else {
2038 _thread_status = java_lang_Thread::get_thread_status(_java_thread());
2039 }
2040 } else {
2041 // unmounted vthread
2042 int vt_state = java_lang_VirtualThread::state(_java_thread());
2043 _thread_status = java_lang_VirtualThread::map_state_to_thread_status(vt_state);
2044 }
2045 _name = java_lang_Thread::name(_java_thread());
2046
2047 if (_thread != nullptr && !_thread->has_last_Java_frame()) {
2048 // stack trace is empty
2049 return;
2050 }
2051
2052 bool walk_cont = false;
2053
2054 if (is_virtual) {
2055 if (_thread != nullptr) {
2056 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
2057 const ContinuationEntry* ce = _thread->vthread_continuation();
2058 if (ce == nullptr || ce->cont_oop(_thread) != java_lang_VirtualThread::continuation(_java_thread())) {
2059 // TODO: handle
2060 }
2061 }
2062 } else {
2063 walk_cont = (_thread->vthread_continuation() != nullptr);
2064 }
2065
2066 ResourceMark rm(Thread::current());
2067
2068 const int max_depth = MaxJavaStackTraceDepth;
2069 const bool skip_hidden = !ShowHiddenFrames;
2070
2071 // Pick minimum length that will cover most cases
2072 int init_length = 64;
2073 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
2074 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
2075
2076 if (_with_locks) {
2077 _locks = new (mtInternal) GrowableArray<LockInfo>(init_length, mtInternal);
2078 }
2079 int total_count = 0;
2080
2081 vframeStream vfst(_thread != nullptr
2082 ? vframeStream(_thread, false, false, walk_cont)
2083 : vframeStream(java_lang_VirtualThread::continuation(_java_thread())));
2084
2085 for (;
2086 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
2087 vfst.next()) {
2088 if (_with_locks) {
2089 detect_locks(vfst.asJavaVFrame(), total_count);
2090 }
2091 if (skip_hidden && (vfst.method()->is_hidden() ||
2092 vfst.method()->is_continuation_enter_intrinsic())) {
2093 continue;
2094 }
2095 _methods->push(vfst.method());
2096 _bcis->push(vfst.bci());
2097 total_count++;
2098 }
2099
2100 _depth = total_count;
2101 }
2102 };
2103
2104 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
2105 ThreadsListHandle tlh(JavaThread::current());
2106 JavaThread* thread;
2107 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
2108 if (is_virtual) {
2109 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
2110 if (carrier_thread == nullptr) {
2111 return nullptr;
2112 }
2113 thread = java_lang_Thread::thread(carrier_thread);
2114 } else {
2115 thread = java_lang_Thread::thread(java_thread);
2116 }
2117 if (thread == nullptr) {
2118 return nullptr;
2119 }
2120
2121 class GetStackTraceClosure : public HandshakeClosure {
2122 public:
2123 const Handle _java_thread;
2124 int _depth;
2125 bool _retry_handshake;
2126 GrowableArray<Method*>* _methods;
2127 GrowableArray<int>* _bcis;
2128
2129 GetStackTraceClosure(Handle java_thread) :
2130 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
2131 _methods(nullptr), _bcis(nullptr) {
2132 }
2133 ~GetStackTraceClosure() {
2134 delete _methods;
2135 delete _bcis;
2136 }
2137
2138 bool read_reset_retry() {
2139 bool ret = _retry_handshake;
2140 // If we re-execute the handshake this method need to return false
2141 // when the handshake cannot be performed. (E.g. thread terminating)
2142 _retry_handshake = false;
2143 return ret;
2144 }
2145
2146 void do_thread(Thread* th) {
2147 if (!Thread::current()->is_Java_thread()) {
2148 _retry_handshake = true;
2149 return;
2150 }
2151
2152 JavaThread* thread = JavaThread::cast(th);
2153
2154 if (!thread->has_last_Java_frame()) {
2155 return;
2156 }
2157
2158 bool carrier = false;
2159 if (java_lang_VirtualThread::is_instance(_java_thread())) {
2160 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
2161 const ContinuationEntry* ce = thread->vthread_continuation();
2162 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
2163 return; // not mounted
2164 }
2165 } else {
2166 carrier = (thread->vthread_continuation() != nullptr);
2167 }
2168
2169 const int max_depth = MaxJavaStackTraceDepth;
2170 const bool skip_hidden = !ShowHiddenFrames;
2171
2172 // Pick minimum length that will cover most cases
2173 int init_length = 64;
2174 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
2175 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
2176
2177 int total_count = 0;
2178 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
2179 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
2180 vfst.next()) {
2181
2182 if (skip_hidden && (vfst.method()->is_hidden() ||
2183 vfst.method()->is_continuation_enter_intrinsic())) {
2184 continue;
2185 }
2186
2187 _methods->push(vfst.method());
2188 _bcis->push(vfst.bci());
2189 total_count++;
2190 }
2191
2192 _depth = total_count;
2193 }
2194 };
2195
2196 // Handshake with target
2197 ResourceMark rm(THREAD);
2198 HandleMark hm(THREAD);
2199 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
2200 do {
2201 Handshake::execute(&gstc, &tlh, thread);
2202 } while (gstc.read_reset_retry());
2203
2204 // Stop if no stack trace is found.
2205 if (gstc._depth == 0) {
2206 return nullptr;
2207 }
2208
2209 // Convert to StackTraceElement array
2210 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2211 assert(k != nullptr, "must be loaded in 1.4+");
2212 if (k->should_be_initialized()) {
2213 k->initialize(CHECK_NULL);
2214 }
2215 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
2216
2217 for (int i = 0; i < gstc._depth; i++) {
2218 methodHandle method(THREAD, gstc._methods->at(i));
2219 oop element = java_lang_StackTraceElement::create(method,
2220 gstc._bcis->at(i),
2221 CHECK_NULL);
2222 trace->obj_at_put(i, element);
2223 }
2224
2225 return trace();
2226 }
2227
2228 class jdk_internal_vm_ThreadLock: AllStatic {
2229 static bool _inited;
2230 static int _depth_offset;
2231 static int _typeOrdinal_offset;
2232 static int _obj_offset;
2233
2234 static void compute_offsets(InstanceKlass * klass, TRAPS) {
2235 JavaClasses::compute_offset(_depth_offset, klass, "depth", vmSymbols::int_signature(), false);
2236 JavaClasses::compute_offset(_typeOrdinal_offset, klass, "typeOrdinal", vmSymbols::int_signature(), false);
2237 JavaClasses::compute_offset(_obj_offset, klass, "obj", vmSymbols::object_signature(), false);
2238 }
2239 public:
2240 static void init(InstanceKlass* klass, TRAPS) {
2241 if (!_inited) {
2242 compute_offsets(klass, CHECK);
2243 _inited = true;
2244 }
2245 }
2246
2247 static Handle allocate(InstanceKlass* klass, TRAPS) {
2248 init(klass, CHECK_NH);
2249 return klass->allocate_instance_handle(CHECK_NH);
2250 }
2251
2252 static void set_depth(oop thread_lock, int depth) {
2253 thread_lock->int_field_put(_depth_offset, depth);
2254 }
2255 static void set_type(oop thread_lock, int type_ordinal) {
2256 thread_lock->int_field_put(_typeOrdinal_offset, type_ordinal);
2257 }
2258 static void set_lock_object(oop thread_lock, oop obj) {
2259 thread_lock->obj_field_put(_obj_offset, obj);
2260 }
2261 };
2262
2263 bool jdk_internal_vm_ThreadLock::_inited = false;
2264 int jdk_internal_vm_ThreadLock::_depth_offset;
2265 int jdk_internal_vm_ThreadLock::_typeOrdinal_offset;
2266 int jdk_internal_vm_ThreadLock::_obj_offset;
2267
2268 class jdk_internal_vm_ThreadSnapshot: AllStatic {
2269 static bool _inited;
2270 static int _name_offset;
2271 static int _threadStatus_offset;
2272 static int _stackTrace_offset;
2273 static int _locks_offset;
2274
2275 static void compute_offsets(InstanceKlass* klass, TRAPS) {
2276 JavaClasses::compute_offset(_name_offset, klass, "name", vmSymbols::string_signature(), false);
2277 JavaClasses::compute_offset(_threadStatus_offset, klass, "threadStatus", vmSymbols::int_signature(), false);
2278 JavaClasses::compute_offset(_stackTrace_offset, klass, "stackTrace", vmSymbols::java_lang_StackTraceElement_array(), false);
2279 JavaClasses::compute_offset(_locks_offset, klass, "locks", vmSymbols::jdk_internal_vm_ThreadLock_array(), false);
2280 }
2281 public:
2282 static void init(InstanceKlass* klass, TRAPS) {
2283 if (!_inited) {
2284 compute_offsets(klass, CHECK);
2285 _inited = true;
2286 }
2287 }
2288
2289 static Handle allocate(InstanceKlass* klass, TRAPS) {
2290 init(klass, CHECK_NH);
2291 return klass->allocate_instance_handle(CHECK_NH);
2292 }
2293
2294 static void set_name(oop snapshot, oop name) {
2295 snapshot->obj_field_put(_name_offset, name);
2296 }
2297 static void set_thread_status(oop snapshot, int status) {
2298 snapshot->int_field_put(_threadStatus_offset, status);
2299 }
2300 static void set_stack_trace(oop snapshot, oop trace) {
2301 snapshot->obj_field_put(_stackTrace_offset, trace);
2302 }
2303 static void set_locks(oop snapshot, oop locks) {
2304 snapshot->obj_field_put(_locks_offset, locks);
2305 }
2306 };
2307
2308 bool jdk_internal_vm_ThreadSnapshot::_inited = false;
2309 int jdk_internal_vm_ThreadSnapshot::_name_offset;
2310 int jdk_internal_vm_ThreadSnapshot::_threadStatus_offset;
2311 int jdk_internal_vm_ThreadSnapshot::_stackTrace_offset;
2312 int jdk_internal_vm_ThreadSnapshot::_locks_offset;
2313
2314 oop java_lang_Thread::get_thread_snapshot(jobject jthread, bool with_locks, TRAPS) {
2315 ThreadsListHandle tlh(JavaThread::current());
2316
2317 ResourceMark rm(THREAD);
2318 HandleMark hm(THREAD);
2319 Handle java_thread(THREAD, JNIHandles::resolve(jthread));
2320
2321 // wrapper to auto delete JvmtiVTMSTransitionDisabler
2322 class TransitionDisabler {
2323 JvmtiVTMSTransitionDisabler* _transition_disabler;
2324 public:
2325 TransitionDisabler() : _transition_disabler(nullptr) {}
2326 ~TransitionDisabler() {
2327 reset();
2328 }
2329 void init(jobject jthread) {
2330 _transition_disabler = new (mtInternal) JvmtiVTMSTransitionDisabler(jthread);
2331 }
2332 void reset() {
2333 if (_transition_disabler != nullptr) {
2334 delete _transition_disabler;
2335 _transition_disabler = nullptr;
2336 }
2337 }
2338 } transition_disabler;
2339
2340 JavaThread* thread = nullptr;
2341 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread());
2342
2343 if (is_virtual) {
2344 // 1st need to disable mount/unmount transitions
2345 transition_disabler.init(jthread);
2346
2347 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread());
2348 if (carrier_thread != nullptr) {
2349 thread = java_lang_Thread::thread(carrier_thread);
2350 }
2351 } else {
2352 thread = java_lang_Thread::thread(java_thread());
2353 }
2354
2355 // Handshake with target
2356 GetThreadSnapshotClosure cl(java_thread, thread, with_locks);
2357 if (thread == nullptr) {
2358 // unmounted vthread, execute on the current thread
2359 cl.do_thread(nullptr);
2360 } else {
2361 do {
2362 Handshake::execute(&cl, &tlh, thread);
2363 } while (cl.read_reset_retry());
2364 }
2365
2366 // Handle thread name
2367 Handle thread_name(THREAD, cl._name);
2368
2369 // Convert to StackTraceElement array
2370 InstanceKlass* ste_klass = vmClasses::StackTraceElement_klass();
2371 assert(ste_klass != nullptr, "must be loaded in 1.4+");
2372 if (ste_klass->should_be_initialized()) {
2373 ste_klass->initialize(CHECK_NULL);
2374 }
2375
2376 int max_locks = cl._locks != nullptr ? cl._locks->length() : 0;
2377
2378 InstanceKlass* lock_klass = nullptr;
2379 if (with_locks) {
2380 Symbol* sym = vmSymbols::jdk_internal_vm_ThreadLock();
2381 Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK_NULL);
2382 lock_klass = InstanceKlass::cast(k);
2383 }
2384
2385 objArrayHandle trace = oopFactory::new_objArray_handle(ste_klass, cl._depth, CHECK_NULL);
2386
2387 for (int i = 0; i < cl._depth; i++) {
2388 methodHandle method(THREAD, cl._methods->at(i));
2389 oop element = java_lang_StackTraceElement::create(method, cl._bcis->at(i), CHECK_NULL);
2390 trace->obj_at_put(i, element);
2391 }
2392
2393 objArrayHandle locks;
2394 int lock_index = 0;
2395 if (with_locks && max_locks > 0) {
2396 locks = oopFactory::new_objArray_handle(lock_klass, max_locks, CHECK_NULL);
2397 for (int n = 0; n < max_locks; n++) {
2398 LockInfo* lock_info = cl._locks->adr_at(lock_index++);
2399 Handle lock_object = Handle(THREAD, lock_info->_obj);
2400
2401 Handle lock = jdk_internal_vm_ThreadLock::allocate(lock_klass, CHECK_NULL);
2402 jdk_internal_vm_ThreadLock::set_depth(lock(), lock_info->_depth);
2403 jdk_internal_vm_ThreadLock::set_type(lock(), lock_info->_type);
2404 jdk_internal_vm_ThreadLock::set_lock_object(lock(), lock_object());
2405 locks->obj_at_put(n, lock());
2406 }
2407 }
2408
2409 // call static StackTraceElement[] StackTraceElement.of(StackTraceElement[] stackTrace)
2410 // to properly initialize STE.
2411 {
2412 JavaValue result(T_OBJECT);
2413 JavaCalls::call_static(&result,
2414 ste_klass,
2415 vmSymbols::java_lang_StackTraceElement_of_name(),
2416 vmSymbols::java_lang_StackTraceElement_of_signature(),
2417 trace,
2418 CHECK_NULL);
2419 // the method return the same trace object
2420 }
2421
2422 // all oops are handled, can enable transitions.
2423 transition_disabler.reset();
2424
2425 Symbol* snapshot_name = vmSymbols::jdk_internal_vm_ThreadSnapshot();
2426 Klass* snapshot_klass = SystemDictionary::resolve_or_fail(snapshot_name, true, CHECK_NULL);
2427 if (snapshot_klass->should_be_initialized()) {
2428 snapshot_klass->initialize(CHECK_NULL);
2429 }
2430
2431 Handle snapshot = jdk_internal_vm_ThreadSnapshot::allocate(InstanceKlass::cast(snapshot_klass), CHECK_NULL);
2432 jdk_internal_vm_ThreadSnapshot::set_name(snapshot(), thread_name());
2433 jdk_internal_vm_ThreadSnapshot::set_thread_status(snapshot(), (int)cl._thread_status);
2434 jdk_internal_vm_ThreadSnapshot::set_stack_trace(snapshot(), trace());
2435 jdk_internal_vm_ThreadSnapshot::set_locks(snapshot(), locks());
2436 return snapshot();
2437 }
2438
2439 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2440 JavaThreadStatus status = get_thread_status(java_thread);
2441 switch (status) {
2442 case JavaThreadStatus::NEW : return "NEW";
2443 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
2444 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
2445 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
2446 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
2447 case JavaThreadStatus::PARKED : return "WAITING (parking)";
2448 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
2449 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2450 case JavaThreadStatus::TERMINATED : return "TERMINATED";
2451 default : return "UNKNOWN";
2452 };
2453 }
2454 int java_lang_ThreadGroup::_parent_offset;
2455 int java_lang_ThreadGroup::_name_offset;
2456 int java_lang_ThreadGroup::_maxPriority_offset;
2457 int java_lang_ThreadGroup::_daemon_offset;
2458
2459 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
2460 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2461 return java_thread_group->obj_field(_parent_offset);
2462 }
2463
2464 // ("name as oop" accessor is not necessary)
2465
2466 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2467 oop name = java_thread_group->obj_field(_name_offset);
2468 // ThreadGroup.name can be null
2469 if (name != nullptr) {
2470 return java_lang_String::as_utf8_string(name);
2471 }
2472 return nullptr;
2473 }
2474
2475 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2476 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2477 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2478 }
2479
2480 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2481 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2482 return java_thread_group->bool_field(_daemon_offset) != 0;
2483 }
2484
2485 #define THREADGROUP_FIELDS_DO(macro) \
2486 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2487 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2488 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2489 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2490
2491 void java_lang_ThreadGroup::compute_offsets() {
2492 assert(_parent_offset == 0, "offsets should be initialized only once");
2493
2494 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2495 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2496 }
2497
2498 #if INCLUDE_CDS
2499 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2500 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2501 }
2502 #endif
2503
2504
2505 // java_lang_VirtualThread
2506
2507 int java_lang_VirtualThread::static_vthread_scope_offset;
2508 int java_lang_VirtualThread::_carrierThread_offset;
2509 int java_lang_VirtualThread::_continuation_offset;
2510 int java_lang_VirtualThread::_state_offset;
2511 int java_lang_VirtualThread::_next_offset;
2512 int java_lang_VirtualThread::_onWaitingList_offset;
2513 int java_lang_VirtualThread::_notified_offset;
2514 int java_lang_VirtualThread::_interruptible_wait_offset;
2515 int java_lang_VirtualThread::_timeout_offset;
2516 int java_lang_VirtualThread::_objectWaiter_offset;
2517
2518 #define VTHREAD_FIELDS_DO(macro) \
2519 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2520 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2521 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2522 macro(_state_offset, k, "state", int_signature, false); \
2523 macro(_next_offset, k, "next", vthread_signature, false); \
2524 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2525 macro(_notified_offset, k, "notified", bool_signature, false); \
2526 macro(_interruptible_wait_offset, k, "interruptableWait", bool_signature, false); \
2527 macro(_timeout_offset, k, "timeout", long_signature, false);
2528
2529
2530 void java_lang_VirtualThread::compute_offsets() {
2531 InstanceKlass* k = vmClasses::VirtualThread_klass();
2532 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2533 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2534 }
2535
2536 bool java_lang_VirtualThread::is_instance(oop obj) {
2537 return obj != nullptr && is_subclass(obj->klass());
2538 }
2539
2540 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2541 oop thread = vthread->obj_field(_carrierThread_offset);
2542 return thread;
2543 }
2544
2545 oop java_lang_VirtualThread::continuation(oop vthread) {
2546 oop cont = vthread->obj_field(_continuation_offset);
2547 return cont;
2548 }
2549
2550 int java_lang_VirtualThread::state(oop vthread) {
2551 return vthread->int_field_acquire(_state_offset);
2552 }
2553
2554 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2555 vthread->release_int_field_put(_state_offset, state);
2556 }
2557
2558 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2559 jint* addr = vthread->field_addr<jint>(_state_offset);
2560 int res = Atomic::cmpxchg(addr, old_state, new_state);
2561 return res;
2562 }
2563
2564 oop java_lang_VirtualThread::next(oop vthread) {
2565 return vthread->obj_field(_next_offset);
2566 }
2567
2568 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2569 vthread->obj_field_put(_next_offset, next_vthread);
2570 }
2571
2572 // Add vthread to the waiting list if it's not already in it. Multiple threads
2573 // could be trying to add vthread to the list at the same time, so we control
2574 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2575 // Method returns true if we added vthread to the list, false otherwise.
2576 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2577 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2578 jboolean vthread_on_list = Atomic::load(addr);
2579 if (!vthread_on_list) {
2580 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2581 if (!vthread_on_list) {
2582 for (;;) {
2583 oop head = list_head.resolve();
2584 java_lang_VirtualThread::set_next(vthread, head);
2585 if (list_head.cmpxchg(head, vthread) == head) return true;
2586 }
2587 }
2588 }
2589 return false; // already on waiting list
2590 }
2591
2592 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2593 vthread->bool_field_put_volatile(_notified_offset, value);
2594 }
2595
2596 void java_lang_VirtualThread::set_interruptible_wait(oop vthread, jboolean value) {
2597 vthread->bool_field_put_volatile(_interruptible_wait_offset, value);
2598 }
2599
2600 jlong java_lang_VirtualThread::timeout(oop vthread) {
2601 return vthread->long_field(_timeout_offset);
2602 }
2603
2604 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2605 vthread->long_field_put(_timeout_offset, value);
2606 }
2607
2608 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2609 JavaThreadStatus status = JavaThreadStatus::NEW;
2610 switch (state & ~SUSPENDED) {
2611 case NEW:
2612 status = JavaThreadStatus::NEW;
2613 break;
2614 case STARTED:
2615 case RUNNING:
2616 case PARKING:
2617 case TIMED_PARKING:
2618 case UNPARKED:
2619 case YIELDING:
2620 case YIELDED:
2621 case UNBLOCKED:
2622 case WAITING:
2623 case TIMED_WAITING:
2624 status = JavaThreadStatus::RUNNABLE;
2625 break;
2626 case PARKED:
2627 case PINNED:
2628 status = JavaThreadStatus::PARKED;
2629 break;
2630 case TIMED_PARKED:
2631 case TIMED_PINNED:
2632 status = JavaThreadStatus::PARKED_TIMED;
2633 break;
2634 case BLOCKING:
2635 case BLOCKED:
2636 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2637 break;
2638 case WAIT:
2639 status = JavaThreadStatus::IN_OBJECT_WAIT;
2640 break;
2641 case TIMED_WAIT:
2642 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2643 break;
2644 case TERMINATED:
2645 status = JavaThreadStatus::TERMINATED;
2646 break;
2647 default:
2648 ShouldNotReachHere();
2649 }
2650 return status;
2651 }
2652
2653 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2654 ObjectWaiter* waiter = objectWaiter(vthread);
2655 if (waiter != nullptr && waiter->at_monitorenter()) {
2656 return waiter->monitor();
2657 }
2658 return nullptr;
2659 }
2660
2661 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2662 ObjectWaiter* waiter = objectWaiter(vthread);
2663 if (waiter != nullptr && waiter->is_wait()) {
2664 return waiter->monitor();
2665 }
2666 return nullptr;
2667 }
2668
2669 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2670 oop continuation = java_lang_VirtualThread::continuation(vthread);
2671 assert(continuation != nullptr, "vthread with no continuation");
2672 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2673 return chunk != nullptr && chunk->preempted();
2674 }
2675
2676 #if INCLUDE_CDS
2677 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2678 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2679 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2680 }
2681 #endif
2682
2683 // java_lang_Throwable
2684
2685 int java_lang_Throwable::_backtrace_offset;
2686 int java_lang_Throwable::_detailMessage_offset;
2687 int java_lang_Throwable::_stackTrace_offset;
2688 int java_lang_Throwable::_depth_offset;
2689 int java_lang_Throwable::_cause_offset;
2690 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2691
2692 #define THROWABLE_FIELDS_DO(macro) \
2693 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2694 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2695 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2696 macro(_depth_offset, k, "depth", int_signature, false); \
2697 macro(_cause_offset, k, "cause", throwable_signature, false); \
2698 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2699
2700 void java_lang_Throwable::compute_offsets() {
2701 InstanceKlass* k = vmClasses::Throwable_klass();
2702 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2703 }
2704
2705 #if INCLUDE_CDS
2706 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2707 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2708 }
2709 #endif
2710
2711 oop java_lang_Throwable::unassigned_stacktrace() {
2712 InstanceKlass* ik = vmClasses::Throwable_klass();
2713 oop base = ik->static_field_base_raw();
2714 return base->obj_field(_static_unassigned_stacktrace_offset);
2715 }
2716
2717 oop java_lang_Throwable::backtrace(oop throwable) {
2718 return throwable->obj_field_acquire(_backtrace_offset);
2719 }
2720
2721
2722 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2723 throwable->release_obj_field_put(_backtrace_offset, value);
2724 }
2725
2726 int java_lang_Throwable::depth(oop throwable) {
2727 return throwable->int_field(_depth_offset);
2728 }
2729
2730 void java_lang_Throwable::set_depth(oop throwable, int value) {
2731 throwable->int_field_put(_depth_offset, value);
2732 }
2733
2734 oop java_lang_Throwable::message(oop throwable) {
2735 return throwable->obj_field(_detailMessage_offset);
2736 }
2737
2738 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2739 oop msg = java_lang_Throwable::message(throwable);
2740 const char* msg_utf8 = nullptr;
2741 if (msg != nullptr) {
2742 msg_utf8 = java_lang_String::as_utf8_string(msg);
2743 }
2744 return msg_utf8;
2745 }
2746
2747 oop java_lang_Throwable::cause(oop throwable) {
2748 return throwable->obj_field(_cause_offset);
2749 }
2750
2751 void java_lang_Throwable::set_message(oop throwable, oop value) {
2752 throwable->obj_field_put(_detailMessage_offset, value);
2753 }
2754
2755
2756 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2757 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2758 }
2759
2760 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2761 set_stacktrace(throwable, nullptr);
2762 }
2763
2764
2765 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2766 ResourceMark rm;
2767 Klass* k = throwable->klass();
2768 assert(k != nullptr, "just checking");
2769 st->print("%s", k->external_name());
2770 oop msg = message(throwable);
2771 if (msg != nullptr) {
2772 st->print(": %s", java_lang_String::as_utf8_string(msg));
2773 }
2774 }
2775
2776 // After this many redefines, the stack trace is unreliable.
2777 const int MAX_VERSION = USHRT_MAX;
2778
2779 static inline bool version_matches(Method* method, int version) {
2780 assert(version < MAX_VERSION, "version is too big");
2781 return method != nullptr && (method->constants()->version() == version);
2782 }
2783
2784 // This class provides a simple wrapper over the internal structure of
2785 // exception backtrace to insulate users of the backtrace from needing
2786 // to know what it looks like.
2787 // The code of this class is not GC safe. Allocations can only happen
2788 // in expand().
2789 class BacktraceBuilder: public StackObj {
2790 friend class BacktraceIterator;
2791 private:
2792 Handle _backtrace;
2793 objArrayOop _head;
2794 typeArrayOop _methods;
2795 typeArrayOop _bcis;
2796 objArrayOop _mirrors;
2797 typeArrayOop _names; // Needed to insulate method name against redefinition.
2798 // True if the top frame of the backtrace is omitted because it shall be hidden.
2799 bool _has_hidden_top_frame;
2800 int _index;
2801 NoSafepointVerifier _nsv;
2802
2803 enum {
2804 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2805 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2806 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2807 trace_names_offset = java_lang_Throwable::trace_names_offset,
2808 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2809 trace_next_offset = java_lang_Throwable::trace_next_offset,
2810 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2811 trace_size = java_lang_Throwable::trace_size,
2812 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2813 };
2814
2815 // get info out of chunks
2816 static typeArrayOop get_methods(objArrayHandle chunk) {
2817 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2818 assert(methods != nullptr, "method array should be initialized in backtrace");
2819 return methods;
2820 }
2821 static typeArrayOop get_bcis(objArrayHandle chunk) {
2822 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2823 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2824 return bcis;
2825 }
2826 static objArrayOop get_mirrors(objArrayHandle chunk) {
2827 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2828 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2829 return mirrors;
2830 }
2831 static typeArrayOop get_names(objArrayHandle chunk) {
2832 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2833 assert(names != nullptr, "names array should be initialized in backtrace");
2834 return names;
2835 }
2836 static bool has_hidden_top_frame(objArrayHandle chunk) {
2837 oop hidden = chunk->obj_at(trace_hidden_offset);
2838 return hidden != nullptr;
2839 }
2840
2841 public:
2842
2843 // constructor for new backtrace
2844 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2845 expand(CHECK);
2846 _backtrace = Handle(THREAD, _head);
2847 _index = 0;
2848 }
2849
2850 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2851 _methods = get_methods(backtrace);
2852 _bcis = get_bcis(backtrace);
2853 _mirrors = get_mirrors(backtrace);
2854 _names = get_names(backtrace);
2855 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2856 assert(_methods->length() == _bcis->length() &&
2857 _methods->length() == _mirrors->length() &&
2858 _mirrors->length() == _names->length(),
2859 "method and source information arrays should match");
2860
2861 // head is the preallocated backtrace
2862 _head = backtrace();
2863 _backtrace = Handle(thread, _head);
2864 _index = 0;
2865 }
2866
2867 void expand(TRAPS) {
2868 objArrayHandle old_head(THREAD, _head);
2869 PauseNoSafepointVerifier pnsv(&_nsv);
2870
2871 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2872 objArrayHandle new_head(THREAD, head);
2873
2874 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2875 typeArrayHandle new_methods(THREAD, methods);
2876
2877 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2878 typeArrayHandle new_bcis(THREAD, bcis);
2879
2880 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2881 objArrayHandle new_mirrors(THREAD, mirrors);
2882
2883 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2884 typeArrayHandle new_names(THREAD, names);
2885
2886 if (!old_head.is_null()) {
2887 old_head->obj_at_put(trace_next_offset, new_head());
2888 }
2889 new_head->obj_at_put(trace_methods_offset, new_methods());
2890 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2891 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2892 new_head->obj_at_put(trace_names_offset, new_names());
2893 new_head->obj_at_put(trace_hidden_offset, nullptr);
2894
2895 _head = new_head();
2896 _methods = new_methods();
2897 _bcis = new_bcis();
2898 _mirrors = new_mirrors();
2899 _names = new_names();
2900 _index = 0;
2901 }
2902
2903 oop backtrace() {
2904 return _backtrace();
2905 }
2906
2907 inline void push(Method* method, int bci, TRAPS) {
2908 // Smear the -1 bci to 0 since the array only holds unsigned
2909 // shorts. The later line number lookup would just smear the -1
2910 // to a 0 even if it could be recorded.
2911 if (bci == SynchronizationEntryBCI) bci = 0;
2912
2913 if (_index >= trace_chunk_size) {
2914 methodHandle mhandle(THREAD, method);
2915 expand(CHECK);
2916 method = mhandle();
2917 }
2918
2919 _methods->ushort_at_put(_index, method->orig_method_idnum());
2920 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2921
2922 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2923 // klass owning the symbols alive so their refcounts aren't decremented.
2924 Symbol* name = method->name();
2925 _names->symbol_at_put(_index, name);
2926
2927 // We need to save the mirrors in the backtrace to keep the class
2928 // from being unloaded while we still have this stack trace.
2929 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2930 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2931
2932 _index++;
2933 }
2934
2935 void set_has_hidden_top_frame() {
2936 if (!_has_hidden_top_frame) {
2937 // It would be nice to add java/lang/Boolean::TRUE here
2938 // to indicate that this backtrace has a hidden top frame.
2939 // But this code is used before TRUE is allocated.
2940 // Therefore let's just use an arbitrary legal oop
2941 // available right here. _methods is a short[].
2942 assert(_methods != nullptr, "we need a legal oop");
2943 _has_hidden_top_frame = true;
2944 _head->obj_at_put(trace_hidden_offset, _methods);
2945 }
2946 }
2947 };
2948
2949 struct BacktraceElement : public StackObj {
2950 int _method_id;
2951 int _bci;
2952 int _version;
2953 Symbol* _name;
2954 Handle _mirror;
2955 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2956 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2957 };
2958
2959 class BacktraceIterator : public StackObj {
2960 int _index;
2961 objArrayHandle _result;
2962 objArrayHandle _mirrors;
2963 typeArrayHandle _methods;
2964 typeArrayHandle _bcis;
2965 typeArrayHandle _names;
2966
2967 void init(objArrayHandle result, Thread* thread) {
2968 // Get method id, bci, version and mirror from chunk
2969 _result = result;
2970 if (_result.not_null()) {
2971 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2972 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2973 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2974 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2975 _index = 0;
2976 }
2977 }
2978 public:
2979 BacktraceIterator(objArrayHandle result, Thread* thread) {
2980 init(result, thread);
2981 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2982 }
2983
2984 BacktraceElement next(Thread* thread) {
2985 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2986 _methods->ushort_at(_index),
2987 Backtrace::version_at(_bcis->int_at(_index)),
2988 Backtrace::bci_at(_bcis->int_at(_index)),
2989 _names->symbol_at(_index));
2990 _index++;
2991
2992 if (_index >= java_lang_Throwable::trace_chunk_size) {
2993 int next_offset = java_lang_Throwable::trace_next_offset;
2994 // Get next chunk
2995 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2996 init(result, thread);
2997 }
2998 return e;
2999 }
3000
3001 bool repeat() {
3002 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
3003 }
3004 };
3005
3006
3007 // Print stack trace element to resource allocated buffer
3008 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
3009 int version, int bci, Symbol* name) {
3010 ResourceMark rm;
3011
3012 // Get strings and string lengths
3013 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
3014 const char* klass_name = holder->external_name();
3015 int buf_len = (int)strlen(klass_name);
3016
3017 char* method_name = name->as_C_string();
3018 buf_len += (int)strlen(method_name);
3019
3020 char* source_file_name = nullptr;
3021 Symbol* source = Backtrace::get_source_file_name(holder, version);
3022 if (source != nullptr) {
3023 source_file_name = source->as_C_string();
3024 buf_len += (int)strlen(source_file_name);
3025 }
3026
3027 char *module_name = nullptr, *module_version = nullptr;
3028 ModuleEntry* module = holder->module();
3029 if (module->is_named()) {
3030 module_name = module->name()->as_C_string();
3031 buf_len += (int)strlen(module_name);
3032 if (module->version() != nullptr) {
3033 module_version = module->version()->as_C_string();
3034 buf_len += (int)strlen(module_version);
3035 }
3036 }
3037
3038 // Allocate temporary buffer with extra space for formatting and line number
3039 const size_t buf_size = buf_len + 64;
3040 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
3041
3042 // Print stack trace line in buffer
3043 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
3044
3045 // Print module information
3046 if (module_name != nullptr) {
3047 if (module_version != nullptr) {
3048 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
3049 } else {
3050 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
3051 }
3052 }
3053
3054 // The method can be null if the requested class version is gone
3055 Method* method = holder->method_with_orig_idnum(method_id, version);
3056 if (!version_matches(method, version)) {
3057 strcat(buf, "Redefined)");
3058 } else {
3059 int line_number = Backtrace::get_line_number(method, bci);
3060 if (line_number == -2) {
3061 strcat(buf, "Native Method)");
3062 } else {
3063 if (source_file_name != nullptr && (line_number != -1)) {
3064 // Sourcename and linenumber
3065 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
3066 } else if (source_file_name != nullptr) {
3067 // Just sourcename
3068 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
3069 } else {
3070 // Neither sourcename nor linenumber
3071 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
3072 }
3073 nmethod* nm = method->code();
3074 if (WizardMode && nm != nullptr) {
3075 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
3076 }
3077 }
3078 }
3079
3080 st->print_cr("%s", buf);
3081 }
3082
3083 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
3084 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
3085 int method_id = method->orig_method_idnum();
3086 int version = method->constants()->version();
3087 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
3088 }
3089
3090 /**
3091 * Print the throwable message and its stack trace plus all causes by walking the
3092 * cause chain. The output looks the same as of Throwable.printStackTrace().
3093 */
3094 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
3095 // First, print the message.
3096 print(throwable(), st);
3097 st->cr();
3098
3099 // Now print the stack trace.
3100 JavaThread* THREAD = JavaThread::current(); // For exception macros.
3101 while (throwable.not_null()) {
3102 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
3103 if (result.is_null()) {
3104 st->print_raw_cr("\t<<no stack trace available>>");
3105 return;
3106 }
3107 BacktraceIterator iter(result, THREAD);
3108
3109 while (iter.repeat()) {
3110 BacktraceElement bte = iter.next(THREAD);
3111 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
3112 }
3113 if (THREAD->can_call_java()) {
3114 // Call getCause() which doesn't necessarily return the _cause field.
3115 ExceptionMark em(THREAD);
3116 JavaValue cause(T_OBJECT);
3117 JavaCalls::call_virtual(&cause,
3118 throwable,
3119 throwable->klass(),
3120 vmSymbols::getCause_name(),
3121 vmSymbols::void_throwable_signature(),
3122 THREAD);
3123 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
3124 if (HAS_PENDING_EXCEPTION) {
3125 CLEAR_PENDING_EXCEPTION;
3126 throwable = Handle();
3127 } else {
3128 throwable = Handle(THREAD, cause.get_oop());
3129 if (throwable.not_null()) {
3130 st->print("Caused by: ");
3131 print(throwable(), st);
3132 st->cr();
3133 }
3134 }
3135 } else {
3136 st->print_raw_cr("<<cannot call Java to get cause>>");
3137 return;
3138 }
3139 }
3140 }
3141
3142 /**
3143 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
3144 */
3145 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
3146 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
3147 JavaValue result(T_VOID);
3148 JavaCalls::call_virtual(&result,
3149 throwable,
3150 vmClasses::Throwable_klass(),
3151 vmSymbols::printStackTrace_name(),
3152 vmSymbols::void_method_signature(),
3153 THREAD);
3154 }
3155
3156 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
3157 if (!StackTraceInThrowable) return;
3158 ResourceMark rm(THREAD);
3159
3160 // Start out by clearing the backtrace for this object, in case the VM
3161 // runs out of memory while allocating the stack trace
3162 set_backtrace(throwable(), nullptr);
3163 // Clear lazily constructed Java level stacktrace if refilling occurs
3164 // This is unnecessary in 1.7+ but harmless
3165 clear_stacktrace(throwable());
3166
3167 int max_depth = MaxJavaStackTraceDepth;
3168 JavaThread* thread = THREAD;
3169
3170 BacktraceBuilder bt(CHECK);
3171
3172 // If there is no Java frame just return the method that was being called
3173 // with bci 0
3174 if (!thread->has_last_Java_frame()) {
3175 if (max_depth >= 1 && method() != nullptr) {
3176 bt.push(method(), 0, CHECK);
3177 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
3178 set_depth(throwable(), 1);
3179 set_backtrace(throwable(), bt.backtrace());
3180 }
3181 return;
3182 }
3183
3184 // Instead of using vframe directly, this version of fill_in_stack_trace
3185 // basically handles everything by hand. This significantly improved the
3186 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
3187 // See bug 6333838 for more details.
3188 // The "ASSERT" here is to verify this method generates the exactly same stack
3189 // trace as utilizing vframe.
3190 #ifdef ASSERT
3191 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
3192 #endif
3193 int total_count = 0;
3194 RegisterMap map(thread,
3195 RegisterMap::UpdateMap::skip,
3196 RegisterMap::ProcessFrames::skip,
3197 RegisterMap::WalkContinuation::include);
3198 int decode_offset = 0;
3199 nmethod* nm = nullptr;
3200 bool skip_fillInStackTrace_check = false;
3201 bool skip_throwableInit_check = false;
3202 bool skip_hidden = !ShowHiddenFrames;
3203 bool show_carrier = ShowCarrierFrames;
3204 ContinuationEntry* cont_entry = thread->last_continuation();
3205 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
3206 Method* method = nullptr;
3207 int bci = 0;
3208
3209 // Compiled java method case.
3210 if (decode_offset != 0) {
3211 DebugInfoReadStream stream(nm, decode_offset);
3212 decode_offset = stream.read_int();
3213 method = (Method*)nm->metadata_at(stream.read_int());
3214 bci = stream.read_bci();
3215 } else {
3216 if (fr.is_first_frame()) break;
3217
3218 if (Continuation::is_continuation_enterSpecial(fr)) {
3219 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
3220 if (!show_carrier && cont_entry->is_virtual_thread()) {
3221 break;
3222 }
3223 cont_entry = cont_entry->parent();
3224 }
3225
3226 address pc = fr.pc();
3227 if (fr.is_interpreted_frame()) {
3228 address bcp;
3229 if (!map.in_cont()) {
3230 bcp = fr.interpreter_frame_bcp();
3231 method = fr.interpreter_frame_method();
3232 } else {
3233 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
3234 method = map.stack_chunk()->interpreter_frame_method(fr);
3235 }
3236 bci = method->bci_from(bcp);
3237 fr = fr.sender(&map);
3238 } else {
3239 CodeBlob* cb = fr.cb();
3240 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
3241 // but non nmethod
3242 fr = fr.sender(&map);
3243 if (cb == nullptr || !cb->is_nmethod()) {
3244 continue;
3245 }
3246 nm = cb->as_nmethod();
3247 assert(nm->method() != nullptr, "must be");
3248 if (nm->method()->is_native()) {
3249 method = nm->method();
3250 bci = 0;
3251 } else {
3252 PcDesc* pd = nm->pc_desc_at(pc);
3253 decode_offset = pd->scope_decode_offset();
3254 // if decode_offset is not equal to 0, it will execute the
3255 // "compiled java method case" at the beginning of the loop.
3256 continue;
3257 }
3258 }
3259 }
3260 #ifdef ASSERT
3261 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
3262 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
3263 st.next();
3264 }
3265 #endif
3266
3267 // the format of the stacktrace will be:
3268 // - 1 or more fillInStackTrace frames for the exception class (skipped)
3269 // - 0 or more <init> methods for the exception class (skipped)
3270 // - rest of the stack
3271
3272 if (!skip_fillInStackTrace_check) {
3273 if (method->name() == vmSymbols::fillInStackTrace_name() &&
3274 throwable->is_a(method->method_holder())) {
3275 continue;
3276 }
3277 else {
3278 skip_fillInStackTrace_check = true; // gone past them all
3279 }
3280 }
3281 if (!skip_throwableInit_check) {
3282 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
3283
3284 // skip <init> methods of the exception class and superclasses
3285 // This is similar to classic VM.
3286 if (method->name() == vmSymbols::object_initializer_name() &&
3287 throwable->is_a(method->method_holder())) {
3288 continue;
3289 } else {
3290 // there are none or we've seen them all - either way stop checking
3291 skip_throwableInit_check = true;
3292 }
3293 }
3294 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
3295 if (skip_hidden) {
3296 if (total_count == 0) {
3297 // The top frame will be hidden from the stack trace.
3298 bt.set_has_hidden_top_frame();
3299 }
3300 continue;
3301 }
3302 }
3303
3304 bt.push(method, bci, CHECK);
3305 total_count++;
3306 }
3307
3308 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
3309
3310 // Put completed stack trace into throwable object
3311 set_backtrace(throwable(), bt.backtrace());
3312 set_depth(throwable(), total_count);
3313 }
3314
3315 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
3316 // No-op if stack trace is disabled
3317 if (!StackTraceInThrowable) {
3318 return;
3319 }
3320
3321 // Disable stack traces for some preallocated out of memory errors
3322 if (!Universe::should_fill_in_stack_trace(throwable)) {
3323 return;
3324 }
3325
3326 JavaThread* THREAD = JavaThread::current(); // For exception macros.
3327 PreserveExceptionMark pm(THREAD);
3328
3329 fill_in_stack_trace(throwable, method, THREAD);
3330 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
3331 // original exception via the PreserveExceptionMark destructor.
3332 CLEAR_PENDING_EXCEPTION;
3333 }
3334
3335 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
3336 // Allocate stack trace - backtrace is created but not filled in
3337
3338 // No-op if stack trace is disabled
3339 if (!StackTraceInThrowable) return;
3340 BacktraceBuilder bt(CHECK); // creates a backtrace
3341 set_backtrace(throwable(), bt.backtrace());
3342 }
3343
3344
3345 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
3346 // Fill in stack trace into preallocated backtrace (no GC)
3347
3348 // No-op if stack trace is disabled
3349 if (!StackTraceInThrowable) return;
3350
3351 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
3352
3353 JavaThread* THREAD = JavaThread::current(); // For exception macros.
3354
3355 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
3356 assert(backtrace.not_null(), "backtrace should have been preallocated");
3357
3358 ResourceMark rm(THREAD);
3359 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
3360
3361 BacktraceBuilder bt(THREAD, backtrace);
3362
3363 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
3364 // methods as preallocated errors aren't created by "java" code.
3365
3366 // fill in as much stack trace as possible
3367 int chunk_count = 0;
3368 for (;!st.at_end(); st.next()) {
3369 bt.push(st.method(), st.bci(), CHECK);
3370 chunk_count++;
3371
3372 // Bail-out for deep stacks
3373 if (chunk_count >= trace_chunk_size) break;
3374 }
3375 set_depth(throwable(), chunk_count);
3376 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
3377
3378 // We support the Throwable immutability protocol defined for Java 7.
3379 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
3380 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
3381 }
3382
3383 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
3384 objArrayHandle stack_trace_array_h, TRAPS) {
3385
3386 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
3387 THROW(vmSymbols::java_lang_NullPointerException());
3388 }
3389
3390 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
3391
3392 if (stack_trace_array_h->length() != depth) {
3393 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
3394 }
3395
3396 objArrayHandle result(THREAD, objArrayOop(backtrace()));
3397 BacktraceIterator iter(result, THREAD);
3398
3399 int index = 0;
3400 while (iter.repeat()) {
3401 BacktraceElement bte = iter.next(THREAD);
3402
3403 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
3404
3405 if (stack_trace_element.is_null()) {
3406 THROW(vmSymbols::java_lang_NullPointerException());
3407 }
3408
3409 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3410 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
3411
3412 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
3413 method,
3414 bte._version,
3415 bte._bci,
3416 bte._name,
3417 CHECK);
3418 }
3419 }
3420
3421 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
3422 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
3423 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
3424 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
3425 // symbolic stacktrace of 'throwable'.
3426 assert(throwable.not_null(), "shouldn't be");
3427
3428 // Now create the message from the original exception and thread name.
3429 ResourceMark rm(current);
3430 const char *message = nullptr;
3431 oop detailed_message = java_lang_Throwable::message(throwable());
3432 if (detailed_message != nullptr) {
3433 message = java_lang_String::as_utf8_string(detailed_message);
3434 }
3435 stringStream st;
3436 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3437 message == nullptr ? "" : ":");
3438 if (message == nullptr) {
3439 st.print("[in thread \"%s\"]", current->name());
3440 } else {
3441 st.print("%s [in thread \"%s\"]", message, current->name());
3442 }
3443
3444 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3445 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3446 // If new_exception returns a different exception while creating the exception,
3447 // abandon the attempt to save the initialization error and return null.
3448 if (init_error->klass()->name() != exception_name) {
3449 log_info(class, init)("Exception %s thrown while saving initialization exception",
3450 init_error->klass()->external_name());
3451 return Handle();
3452 }
3453
3454 // Call to java to fill in the stack trace and clear declaringClassObject to
3455 // not keep classes alive in the stack trace.
3456 // call this: public StackTraceElement[] getStackTrace()
3457 JavaValue result(T_ARRAY);
3458 JavaCalls::call_virtual(&result, throwable,
3459 vmClasses::Throwable_klass(),
3460 vmSymbols::getStackTrace_name(),
3461 vmSymbols::getStackTrace_signature(),
3462 current);
3463 if (!current->has_pending_exception()){
3464 Handle stack_trace(current, result.get_oop());
3465 assert(stack_trace->is_objArray(), "Should be an array");
3466 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3467 // Clear backtrace because the stacktrace should be used instead.
3468 set_backtrace(init_error(), nullptr);
3469 } else {
3470 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3471 init_error->klass()->external_name());
3472 current->clear_pending_exception();
3473 }
3474
3475 return init_error;
3476 }
3477
3478 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3479 JavaThread* current = JavaThread::current();
3480 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3481 BacktraceIterator iter(result, current);
3482 // No backtrace available.
3483 if (!iter.repeat()) return false;
3484
3485 // If the exception happened in a frame that has been hidden, i.e.,
3486 // omitted from the back trace, we can not compute the message.
3487 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3488 if (hidden != nullptr) {
3489 return false;
3490 }
3491
3492 // Get first backtrace element.
3493 BacktraceElement bte = iter.next(current);
3494
3495 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3496 assert(holder != nullptr, "first element should be non-null");
3497 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3498
3499 // Original version is no longer available.
3500 if (m == nullptr || !version_matches(m, bte._version)) {
3501 return false;
3502 }
3503
3504 *method = m;
3505 *bci = bte._bci;
3506 return true;
3507 }
3508
3509 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3510 // Allocate java.lang.StackTraceElement instance
3511 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3512 assert(k != nullptr, "must be loaded in 1.4+");
3513 if (k->should_be_initialized()) {
3514 k->initialize(CHECK_NULL);
3515 }
3516
3517 Handle element = k->allocate_instance_handle(CHECK_NULL);
3518
3519 int version = method->constants()->version();
3520 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3521 return element();
3522 }
3523
3524 void java_lang_StackTraceElement::fill_in(Handle element,
3525 InstanceKlass* holder, const methodHandle& method,
3526 int version, int bci, Symbol* name, TRAPS) {
3527 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3528
3529 ResourceMark rm(THREAD);
3530 HandleMark hm(THREAD);
3531
3532 // Fill in class name
3533 Handle java_class(THREAD, holder->java_mirror());
3534 oop classname = java_lang_Class::name(java_class, CHECK);
3535 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3536 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3537
3538 oop loader = holder->class_loader();
3539 if (loader != nullptr) {
3540 oop loader_name = java_lang_ClassLoader::name(loader);
3541 if (loader_name != nullptr)
3542 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3543 }
3544
3545 // Fill in method name
3546 oop methodname = StringTable::intern(name, CHECK);
3547 java_lang_StackTraceElement::set_methodName(element(), methodname);
3548
3549 // Fill in module name and version
3550 ModuleEntry* module = holder->module();
3551 if (module->is_named()) {
3552 oop module_name = StringTable::intern(module->name(), CHECK);
3553 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3554 oop module_version;
3555 if (module->version() != nullptr) {
3556 module_version = StringTable::intern(module->version(), CHECK);
3557 } else {
3558 module_version = nullptr;
3559 }
3560 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3561 }
3562
3563 if (method() == nullptr || !version_matches(method(), version)) {
3564 // The method was redefined, accurate line number information isn't available
3565 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3566 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3567 } else {
3568 Symbol* source;
3569 oop source_file;
3570 int line_number;
3571 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3572
3573 java_lang_StackTraceElement::set_fileName(element(), source_file);
3574 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3575 }
3576 }
3577
3578 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3579 InstanceKlass* holder,
3580 int version,
3581 const methodHandle& method,
3582 int bci,
3583 Symbol*& source,
3584 oop& source_file,
3585 int& line_number, TRAPS) {
3586 // Fill in source file name and line number.
3587 source = Backtrace::get_source_file_name(holder, version);
3588 source_file = java_lang_Class::source_file(java_class());
3589 if (source != nullptr) {
3590 // Class was not redefined. We can trust its cache if set,
3591 // else we have to initialize it.
3592 if (source_file == nullptr) {
3593 source_file = StringTable::intern(source, CHECK);
3594 java_lang_Class::set_source_file(java_class(), source_file);
3595 }
3596 } else {
3597 // Class was redefined. Dump the cache if it was set.
3598 if (source_file != nullptr) {
3599 source_file = nullptr;
3600 java_lang_Class::set_source_file(java_class(), source_file);
3601 }
3602 }
3603 line_number = Backtrace::get_line_number(method(), bci);
3604 }
3605
3606 #if INCLUDE_JVMCI
3607 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3608 Symbol*& filename, int& line_number, TRAPS) {
3609 ResourceMark rm(THREAD);
3610 HandleMark hm(THREAD);
3611
3612 filename = nullptr;
3613 line_number = -1;
3614
3615 oop source_file;
3616 int version = method->constants()->version();
3617 InstanceKlass* holder = method->method_holder();
3618 Handle java_class(THREAD, holder->java_mirror());
3619 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3620 }
3621 #endif // INCLUDE_JVMCI
3622
3623 // java_lang_ClassFrameInfo
3624
3625 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3626 int java_lang_ClassFrameInfo::_flags_offset;
3627
3628 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3629 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3630 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3631
3632 void java_lang_ClassFrameInfo::compute_offsets() {
3633 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3634 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3635 }
3636
3637 #if INCLUDE_CDS
3638 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3639 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3640 }
3641 #endif
3642
3643 static int get_flags(const methodHandle& m) {
3644 int flags = m->access_flags().as_method_flags();
3645 if (m->is_object_initializer()) {
3646 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3647 } else {
3648 // Note: Static initializers can be here. Record them as plain methods.
3649 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3650 }
3651 if (m->caller_sensitive()) {
3652 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3653 }
3654 if (m->is_hidden()) {
3655 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3656 }
3657 assert((flags & 0xFF000000) == 0, "unexpected flags");
3658 return flags;
3659 }
3660
3661 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3662 return obj->obj_field(_classOrMemberName_offset);
3663 }
3664
3665 int java_lang_ClassFrameInfo::flags(oop obj) {
3666 return obj->int_field(_flags_offset);
3667 }
3668
3669 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3670 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3671 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3672 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3673 stackFrame->int_field_put(_flags_offset, flags);
3674 }
3675
3676 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3677 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3678 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3679 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3680 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3681 stackFrame->int_field_put(_flags_offset, flags);
3682 }
3683
3684
3685 // java_lang_StackFrameInfo
3686
3687 int java_lang_StackFrameInfo::_type_offset;
3688 int java_lang_StackFrameInfo::_name_offset;
3689 int java_lang_StackFrameInfo::_bci_offset;
3690 int java_lang_StackFrameInfo::_version_offset;
3691 int java_lang_StackFrameInfo::_contScope_offset;
3692
3693 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3694 macro(_type_offset, k, "type", object_signature, false); \
3695 macro(_name_offset, k, "name", string_signature, false); \
3696 macro(_bci_offset, k, "bci", int_signature, false); \
3697 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3698
3699 void java_lang_StackFrameInfo::compute_offsets() {
3700 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3701 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3702 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3703 }
3704
3705 #if INCLUDE_CDS
3706 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3707 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3708 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3709 }
3710 #endif
3711
3712 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3713 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3714 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3715 return method;
3716 }
3717
3718 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3719 // set Method* or mid/cpref
3720 HandleMark hm(THREAD);
3721 Handle cont_h(THREAD, cont);
3722 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3723
3724 // set bci
3725 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3726 // method may be redefined; store the version
3727 int version = method->constants()->version();
3728 assert((jushort)version == version, "version should be short");
3729 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3730
3731 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3732 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3733 }
3734
3735 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3736 ResourceMark rm(THREAD);
3737 HandleMark hm(THREAD);
3738
3739 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3740 InstanceKlass* holder = method->method_holder();
3741 short version = stackFrame->short_field(_version_offset);
3742 int bci = stackFrame->int_field(_bci_offset);
3743 Symbol* name = method->name();
3744 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3745 }
3746
3747 oop java_lang_StackFrameInfo::type(oop obj) {
3748 return obj->obj_field(_type_offset);
3749 }
3750
3751 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3752 obj->obj_field_put(_type_offset, value);
3753 }
3754
3755 oop java_lang_StackFrameInfo::name(oop obj) {
3756 return obj->obj_field(_name_offset);
3757 }
3758
3759 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3760 obj->obj_field_put(_name_offset, value);
3761 }
3762
3763 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3764 obj->short_field_put(_version_offset, value);
3765 }
3766
3767 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3768 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3769 obj->int_field_put(_bci_offset, value);
3770 }
3771
3772 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3773 obj->obj_field_put(_contScope_offset, value);
3774 }
3775
3776 int java_lang_LiveStackFrameInfo::_monitors_offset;
3777 int java_lang_LiveStackFrameInfo::_locals_offset;
3778 int java_lang_LiveStackFrameInfo::_operands_offset;
3779 int java_lang_LiveStackFrameInfo::_mode_offset;
3780
3781 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3782 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3783 macro(_locals_offset, k, "locals", object_array_signature, false); \
3784 macro(_operands_offset, k, "operands", object_array_signature, false); \
3785 macro(_mode_offset, k, "mode", int_signature, false)
3786
3787 void java_lang_LiveStackFrameInfo::compute_offsets() {
3788 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3789 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3790 }
3791
3792 #if INCLUDE_CDS
3793 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3794 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3795 }
3796 #endif
3797
3798 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3799 obj->obj_field_put(_monitors_offset, value);
3800 }
3801
3802 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3803 obj->obj_field_put(_locals_offset, value);
3804 }
3805
3806 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3807 obj->obj_field_put(_operands_offset, value);
3808 }
3809
3810 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3811 obj->int_field_put(_mode_offset, value);
3812 }
3813
3814 // java_lang_AccessibleObject
3815
3816 int java_lang_reflect_AccessibleObject::_override_offset;
3817
3818 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3819 macro(_override_offset, k, "override", bool_signature, false)
3820
3821 void java_lang_reflect_AccessibleObject::compute_offsets() {
3822 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3823 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3824 }
3825
3826 #if INCLUDE_CDS
3827 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3828 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3829 }
3830 #endif
3831
3832 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3833 return (jboolean) reflect->bool_field(_override_offset);
3834 }
3835
3836 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3837 reflect->bool_field_put(_override_offset, (int) value);
3838 }
3839
3840 // java_lang_reflect_Method
3841
3842 int java_lang_reflect_Method::_clazz_offset;
3843 int java_lang_reflect_Method::_name_offset;
3844 int java_lang_reflect_Method::_returnType_offset;
3845 int java_lang_reflect_Method::_parameterTypes_offset;
3846 int java_lang_reflect_Method::_exceptionTypes_offset;
3847 int java_lang_reflect_Method::_slot_offset;
3848 int java_lang_reflect_Method::_modifiers_offset;
3849 int java_lang_reflect_Method::_signature_offset;
3850 int java_lang_reflect_Method::_annotations_offset;
3851 int java_lang_reflect_Method::_parameter_annotations_offset;
3852 int java_lang_reflect_Method::_annotation_default_offset;
3853
3854 #define METHOD_FIELDS_DO(macro) \
3855 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3856 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3857 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3858 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3859 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3860 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3861 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3862 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3863 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3864 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3865 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3866
3867 void java_lang_reflect_Method::compute_offsets() {
3868 InstanceKlass* k = vmClasses::reflect_Method_klass();
3869 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3870 }
3871
3872 #if INCLUDE_CDS
3873 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3874 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3875 }
3876 #endif
3877
3878 Handle java_lang_reflect_Method::create(TRAPS) {
3879 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3880 Klass* klass = vmClasses::reflect_Method_klass();
3881 // This class is eagerly initialized during VM initialization, since we keep a reference
3882 // to one of the methods
3883 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3884 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3885 }
3886
3887 oop java_lang_reflect_Method::clazz(oop reflect) {
3888 return reflect->obj_field(_clazz_offset);
3889 }
3890
3891 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3892 reflect->obj_field_put(_clazz_offset, value);
3893 }
3894
3895 int java_lang_reflect_Method::slot(oop reflect) {
3896 return reflect->int_field(_slot_offset);
3897 }
3898
3899 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3900 reflect->int_field_put(_slot_offset, value);
3901 }
3902
3903 void java_lang_reflect_Method::set_name(oop method, oop value) {
3904 method->obj_field_put(_name_offset, value);
3905 }
3906
3907 oop java_lang_reflect_Method::return_type(oop method) {
3908 return method->obj_field(_returnType_offset);
3909 }
3910
3911 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3912 method->obj_field_put(_returnType_offset, value);
3913 }
3914
3915 oop java_lang_reflect_Method::parameter_types(oop method) {
3916 return method->obj_field(_parameterTypes_offset);
3917 }
3918
3919 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3920 method->obj_field_put(_parameterTypes_offset, value);
3921 }
3922
3923 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3924 method->obj_field_put(_exceptionTypes_offset, value);
3925 }
3926
3927 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3928 method->int_field_put(_modifiers_offset, value);
3929 }
3930
3931 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3932 method->obj_field_put(_signature_offset, value);
3933 }
3934
3935 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3936 method->obj_field_put(_annotations_offset, value);
3937 }
3938
3939 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3940 method->obj_field_put(_parameter_annotations_offset, value);
3941 }
3942
3943 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3944 method->obj_field_put(_annotation_default_offset, value);
3945 }
3946
3947 int java_lang_reflect_Constructor::_clazz_offset;
3948 int java_lang_reflect_Constructor::_parameterTypes_offset;
3949 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3950 int java_lang_reflect_Constructor::_slot_offset;
3951 int java_lang_reflect_Constructor::_modifiers_offset;
3952 int java_lang_reflect_Constructor::_signature_offset;
3953 int java_lang_reflect_Constructor::_annotations_offset;
3954 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3955
3956 #define CONSTRUCTOR_FIELDS_DO(macro) \
3957 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3958 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3959 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3960 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3961 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3962 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3963 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3964 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3965
3966 void java_lang_reflect_Constructor::compute_offsets() {
3967 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3968 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3969 }
3970
3971 #if INCLUDE_CDS
3972 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3973 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3974 }
3975 #endif
3976
3977 Handle java_lang_reflect_Constructor::create(TRAPS) {
3978 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3979 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3980 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3981 InstanceKlass* ik = InstanceKlass::cast(k);
3982 // Ensure it is initialized
3983 ik->initialize(CHECK_NH);
3984 return ik->allocate_instance_handle(THREAD);
3985 }
3986
3987 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3988 return reflect->obj_field(_clazz_offset);
3989 }
3990
3991 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3992 reflect->obj_field_put(_clazz_offset, value);
3993 }
3994
3995 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3996 return constructor->obj_field(_parameterTypes_offset);
3997 }
3998
3999 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
4000 constructor->obj_field_put(_parameterTypes_offset, value);
4001 }
4002
4003 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
4004 constructor->obj_field_put(_exceptionTypes_offset, value);
4005 }
4006
4007 int java_lang_reflect_Constructor::slot(oop reflect) {
4008 return reflect->int_field(_slot_offset);
4009 }
4010
4011 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
4012 reflect->int_field_put(_slot_offset, value);
4013 }
4014
4015 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
4016 constructor->int_field_put(_modifiers_offset, value);
4017 }
4018
4019 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
4020 constructor->obj_field_put(_signature_offset, value);
4021 }
4022
4023 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
4024 constructor->obj_field_put(_annotations_offset, value);
4025 }
4026
4027 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
4028 method->obj_field_put(_parameter_annotations_offset, value);
4029 }
4030
4031 int java_lang_reflect_Field::_clazz_offset;
4032 int java_lang_reflect_Field::_name_offset;
4033 int java_lang_reflect_Field::_type_offset;
4034 int java_lang_reflect_Field::_slot_offset;
4035 int java_lang_reflect_Field::_modifiers_offset;
4036 int java_lang_reflect_Field::_trusted_final_offset;
4037 int java_lang_reflect_Field::_signature_offset;
4038 int java_lang_reflect_Field::_annotations_offset;
4039
4040 #define FIELD_FIELDS_DO(macro) \
4041 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4042 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4043 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
4044 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
4045 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
4046 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
4047 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
4048 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
4049
4050 void java_lang_reflect_Field::compute_offsets() {
4051 InstanceKlass* k = vmClasses::reflect_Field_klass();
4052 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4053 }
4054
4055 #if INCLUDE_CDS
4056 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
4057 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4058 }
4059 #endif
4060
4061 Handle java_lang_reflect_Field::create(TRAPS) {
4062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
4063 Symbol* name = vmSymbols::java_lang_reflect_Field();
4064 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
4065 InstanceKlass* ik = InstanceKlass::cast(k);
4066 // Ensure it is initialized
4067 ik->initialize(CHECK_NH);
4068 return ik->allocate_instance_handle(THREAD);
4069 }
4070
4071 oop java_lang_reflect_Field::clazz(oop reflect) {
4072 return reflect->obj_field(_clazz_offset);
4073 }
4074
4075 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
4076 reflect->obj_field_put(_clazz_offset, value);
4077 }
4078
4079 oop java_lang_reflect_Field::name(oop field) {
4080 return field->obj_field(_name_offset);
4081 }
4082
4083 void java_lang_reflect_Field::set_name(oop field, oop value) {
4084 field->obj_field_put(_name_offset, value);
4085 }
4086
4087 oop java_lang_reflect_Field::type(oop field) {
4088 return field->obj_field(_type_offset);
4089 }
4090
4091 void java_lang_reflect_Field::set_type(oop field, oop value) {
4092 field->obj_field_put(_type_offset, value);
4093 }
4094
4095 int java_lang_reflect_Field::slot(oop reflect) {
4096 return reflect->int_field(_slot_offset);
4097 }
4098
4099 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
4100 reflect->int_field_put(_slot_offset, value);
4101 }
4102
4103 int java_lang_reflect_Field::modifiers(oop field) {
4104 return field->int_field(_modifiers_offset);
4105 }
4106
4107 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
4108 field->int_field_put(_modifiers_offset, value);
4109 }
4110
4111 void java_lang_reflect_Field::set_trusted_final(oop field) {
4112 field->bool_field_put(_trusted_final_offset, true);
4113 }
4114
4115 void java_lang_reflect_Field::set_signature(oop field, oop value) {
4116 field->obj_field_put(_signature_offset, value);
4117 }
4118
4119 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
4120 field->obj_field_put(_annotations_offset, value);
4121 }
4122
4123 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
4124 // Allocate java.lang.reflect.RecordComponent instance
4125 HandleMark hm(THREAD);
4126 InstanceKlass* ik = vmClasses::RecordComponent_klass();
4127 assert(ik != nullptr, "must be loaded");
4128 ik->initialize(CHECK_NULL);
4129
4130 Handle element = ik->allocate_instance_handle(CHECK_NULL);
4131
4132 Handle decl_class(THREAD, holder->java_mirror());
4133 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
4134
4135 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
4136 oop component_name = StringTable::intern(name, CHECK_NULL);
4137 java_lang_reflect_RecordComponent::set_name(element(), component_name);
4138
4139 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
4140 Handle component_type_h =
4141 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
4142 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
4143
4144 Method* accessor_method = nullptr;
4145 {
4146 // Prepend "()" to type to create the full method signature.
4147 ResourceMark rm(THREAD);
4148 int sig_len = type->utf8_length() + 3; // "()" and null char
4149 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
4150 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
4151 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
4152 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
4153 }
4154
4155 if (accessor_method != nullptr) {
4156 methodHandle method(THREAD, accessor_method);
4157 oop m = Reflection::new_method(method, false, CHECK_NULL);
4158 java_lang_reflect_RecordComponent::set_accessor(element(), m);
4159 } else {
4160 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
4161 }
4162
4163 int sig_index = component->generic_signature_index();
4164 if (sig_index > 0) {
4165 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
4166 oop component_sig = StringTable::intern(sig, CHECK_NULL);
4167 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
4168 } else {
4169 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
4170 }
4171
4172 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
4173 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
4174
4175 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
4176 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
4177
4178 return element();
4179 }
4180
4181 int reflect_ConstantPool::_oop_offset;
4182
4183 #define CONSTANTPOOL_FIELDS_DO(macro) \
4184 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
4185
4186 void reflect_ConstantPool::compute_offsets() {
4187 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
4188 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
4189 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4190 }
4191
4192 #if INCLUDE_CDS
4193 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
4194 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4195 }
4196 #endif
4197
4198 int java_lang_reflect_Parameter::_name_offset;
4199 int java_lang_reflect_Parameter::_modifiers_offset;
4200 int java_lang_reflect_Parameter::_index_offset;
4201 int java_lang_reflect_Parameter::_executable_offset;
4202
4203 #define PARAMETER_FIELDS_DO(macro) \
4204 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4205 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
4206 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
4207 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
4208
4209 void java_lang_reflect_Parameter::compute_offsets() {
4210 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
4211 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4212 }
4213
4214 #if INCLUDE_CDS
4215 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
4216 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4217 }
4218 #endif
4219
4220 Handle java_lang_reflect_Parameter::create(TRAPS) {
4221 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
4222 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
4223 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
4224 InstanceKlass* ik = InstanceKlass::cast(k);
4225 // Ensure it is initialized
4226 ik->initialize(CHECK_NH);
4227 return ik->allocate_instance_handle(THREAD);
4228 }
4229
4230 oop java_lang_reflect_Parameter::name(oop param) {
4231 return param->obj_field(_name_offset);
4232 }
4233
4234 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
4235 param->obj_field_put(_name_offset, value);
4236 }
4237
4238 int java_lang_reflect_Parameter::modifiers(oop param) {
4239 return param->int_field(_modifiers_offset);
4240 }
4241
4242 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
4243 param->int_field_put(_modifiers_offset, value);
4244 }
4245
4246 int java_lang_reflect_Parameter::index(oop param) {
4247 return param->int_field(_index_offset);
4248 }
4249
4250 void java_lang_reflect_Parameter::set_index(oop param, int value) {
4251 param->int_field_put(_index_offset, value);
4252 }
4253
4254 oop java_lang_reflect_Parameter::executable(oop param) {
4255 return param->obj_field(_executable_offset);
4256 }
4257
4258 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
4259 param->obj_field_put(_executable_offset, value);
4260 }
4261
4262 // java_lang_Module
4263
4264 int java_lang_Module::_loader_offset;
4265 int java_lang_Module::_name_offset;
4266 int java_lang_Module::_module_entry_offset;
4267
4268 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
4269 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
4270 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
4271 vmSymbols::java_lang_module_init_signature(),
4272 loader, module_name, CHECK_NH);
4273 }
4274
4275 #define MODULE_FIELDS_DO(macro) \
4276 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
4277 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
4278
4279 void java_lang_Module::compute_offsets() {
4280 InstanceKlass* k = vmClasses::Module_klass();
4281 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4282 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4283 }
4284
4285 #if INCLUDE_CDS
4286 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
4287 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4288 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4289 }
4290 #endif
4291
4292 oop java_lang_Module::loader(oop module) {
4293 return module->obj_field(_loader_offset);
4294 }
4295
4296 void java_lang_Module::set_loader(oop module, oop value) {
4297 module->obj_field_put(_loader_offset, value);
4298 }
4299
4300 oop java_lang_Module::name(oop module) {
4301 return module->obj_field(_name_offset);
4302 }
4303
4304 void java_lang_Module::set_name(oop module, oop value) {
4305 module->obj_field_put(_name_offset, value);
4306 }
4307
4308 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
4309 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
4310 assert(module != nullptr, "module can't be null");
4311 assert(oopDesc::is_oop(module), "module must be oop");
4312
4313 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
4314 return module_entry;
4315 }
4316
4317 ModuleEntry* java_lang_Module::module_entry(oop module) {
4318 ModuleEntry* module_entry = module_entry_raw(module);
4319 if (module_entry == nullptr) {
4320 // If the inject field containing the ModuleEntry* is null then return the
4321 // class loader's unnamed module.
4322 oop loader = java_lang_Module::loader(module);
4323 Handle h_loader = Handle(Thread::current(), loader);
4324 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
4325 return loader_cld->unnamed_module();
4326 }
4327 return module_entry;
4328 }
4329
4330 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
4331 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
4332 assert(module != nullptr, "module can't be null");
4333 assert(oopDesc::is_oop(module), "module must be oop");
4334 module->address_field_put(_module_entry_offset, (address)module_entry);
4335 }
4336
4337 Handle reflect_ConstantPool::create(TRAPS) {
4338 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
4339 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
4340 // Ensure it is initialized
4341 k->initialize(CHECK_NH);
4342 return k->allocate_instance_handle(THREAD);
4343 }
4344
4345
4346 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
4347 oop mirror = value->pool_holder()->java_mirror();
4348 // Save the mirror to get back the constant pool.
4349 reflect->obj_field_put(_oop_offset, mirror);
4350 }
4351
4352 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
4353
4354 oop mirror = reflect->obj_field(_oop_offset);
4355 Klass* k = java_lang_Class::as_Klass(mirror);
4356 assert(k->is_instance_klass(), "Must be");
4357
4358 // Get the constant pool back from the klass. Since class redefinition
4359 // merges the new constant pool into the old, this is essentially the
4360 // same constant pool as the original. If constant pool merging is
4361 // no longer done in the future, this will have to change to save
4362 // the original.
4363 return InstanceKlass::cast(k)->constants();
4364 }
4365
4366
4367 // Support for java_lang_ref_Reference
4368
4369 bool java_lang_ref_Reference::_offsets_initialized;
4370
4371 int java_lang_ref_Reference::_referent_offset;
4372 int java_lang_ref_Reference::_queue_offset;
4373 int java_lang_ref_Reference::_next_offset;
4374 int java_lang_ref_Reference::_discovered_offset;
4375
4376 #define REFERENCE_FIELDS_DO(macro) \
4377 macro(_referent_offset, k, "referent", object_signature, false); \
4378 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
4379 macro(_next_offset, k, "next", reference_signature, false); \
4380 macro(_discovered_offset, k, "discovered", reference_signature, false);
4381
4382 void java_lang_ref_Reference::compute_offsets() {
4383 if (_offsets_initialized) {
4384 return;
4385 }
4386 _offsets_initialized = true;
4387 InstanceKlass* k = vmClasses::Reference_klass();
4388 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4389 }
4390
4391 #if INCLUDE_CDS
4392 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
4393 f->do_bool(&_offsets_initialized);
4394 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4395 }
4396 #endif
4397
4398 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
4399 assert(obj != nullptr, "sanity");
4400 if (offset != _referent_offset) {
4401 return false;
4402 }
4403
4404 Klass* k = obj->klass();
4405 if (!k->is_instance_klass()) {
4406 return false;
4407 }
4408
4409 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
4410 bool is_reference = ik->reference_type() != REF_NONE;
4411 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
4412 return is_reference;
4413 }
4414
4415 int java_lang_boxing_object::_value_offset;
4416 int java_lang_boxing_object::_long_value_offset;
4417
4418 #define BOXING_FIELDS_DO(macro) \
4419 macro(_value_offset, integerKlass, "value", int_signature, false); \
4420 macro(_long_value_offset, longKlass, "value", long_signature, false);
4421
4422 void java_lang_boxing_object::compute_offsets() {
4423 InstanceKlass* integerKlass = vmClasses::Integer_klass();
4424 InstanceKlass* longKlass = vmClasses::Long_klass();
4425 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4426 }
4427
4428 #if INCLUDE_CDS
4429 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
4430 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4431 }
4432 #endif
4433
4434 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4435 Klass* k = vmClasses::box_klass(type);
4436 if (k == nullptr) return nullptr;
4437 InstanceKlass* ik = InstanceKlass::cast(k);
4438 if (!ik->is_initialized()) {
4439 ik->initialize(CHECK_NULL);
4440 }
4441 return ik->allocate_instance(THREAD);
4442 }
4443
4444
4445 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4446 oop box = initialize_and_allocate(type, CHECK_NULL);
4447 if (box == nullptr) return nullptr;
4448 switch (type) {
4449 case T_BOOLEAN:
4450 box->bool_field_put(_value_offset, value->z);
4451 break;
4452 case T_CHAR:
4453 box->char_field_put(_value_offset, value->c);
4454 break;
4455 case T_FLOAT:
4456 box->float_field_put(_value_offset, value->f);
4457 break;
4458 case T_DOUBLE:
4459 box->double_field_put(_long_value_offset, value->d);
4460 break;
4461 case T_BYTE:
4462 box->byte_field_put(_value_offset, value->b);
4463 break;
4464 case T_SHORT:
4465 box->short_field_put(_value_offset, value->s);
4466 break;
4467 case T_INT:
4468 box->int_field_put(_value_offset, value->i);
4469 break;
4470 case T_LONG:
4471 box->long_field_put(_long_value_offset, value->j);
4472 break;
4473 default:
4474 return nullptr;
4475 }
4476 return box;
4477 }
4478
4479
4480 BasicType java_lang_boxing_object::basic_type(oop box) {
4481 if (box == nullptr) return T_ILLEGAL;
4482 BasicType type = vmClasses::box_klass_type(box->klass());
4483 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
4484 return T_ILLEGAL;
4485 return type;
4486 }
4487
4488
4489 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4490 BasicType type = vmClasses::box_klass_type(box->klass());
4491 switch (type) {
4492 case T_BOOLEAN:
4493 value->z = box->bool_field(_value_offset);
4494 break;
4495 case T_CHAR:
4496 value->c = box->char_field(_value_offset);
4497 break;
4498 case T_FLOAT:
4499 value->f = box->float_field(_value_offset);
4500 break;
4501 case T_DOUBLE:
4502 value->d = box->double_field(_long_value_offset);
4503 break;
4504 case T_BYTE:
4505 value->b = box->byte_field(_value_offset);
4506 break;
4507 case T_SHORT:
4508 value->s = box->short_field(_value_offset);
4509 break;
4510 case T_INT:
4511 value->i = box->int_field(_value_offset);
4512 break;
4513 case T_LONG:
4514 value->j = box->long_field(_long_value_offset);
4515 break;
4516 default:
4517 return T_ILLEGAL;
4518 } // end switch
4519 return type;
4520 }
4521
4522
4523 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4524 BasicType type = vmClasses::box_klass_type(box->klass());
4525 switch (type) {
4526 case T_BOOLEAN:
4527 box->bool_field_put(_value_offset, value->z);
4528 break;
4529 case T_CHAR:
4530 box->char_field_put(_value_offset, value->c);
4531 break;
4532 case T_FLOAT:
4533 box->float_field_put(_value_offset, value->f);
4534 break;
4535 case T_DOUBLE:
4536 box->double_field_put(_long_value_offset, value->d);
4537 break;
4538 case T_BYTE:
4539 box->byte_field_put(_value_offset, value->b);
4540 break;
4541 case T_SHORT:
4542 box->short_field_put(_value_offset, value->s);
4543 break;
4544 case T_INT:
4545 box->int_field_put(_value_offset, value->i);
4546 break;
4547 case T_LONG:
4548 box->long_field_put(_long_value_offset, value->j);
4549 break;
4550 default:
4551 return T_ILLEGAL;
4552 } // end switch
4553 return type;
4554 }
4555
4556
4557 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4558 switch (type) {
4559 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4560 case T_CHAR: st->print("%d", value->c); break;
4561 case T_BYTE: st->print("%d", value->b); break;
4562 case T_SHORT: st->print("%d", value->s); break;
4563 case T_INT: st->print("%d", value->i); break;
4564 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4565 case T_FLOAT: st->print("%f", value->f); break;
4566 case T_DOUBLE: st->print("%lf", value->d); break;
4567 default: st->print("type %d?", type); break;
4568 }
4569 }
4570
4571
4572 // Support for java_lang_ref_SoftReference
4573 //
4574
4575 int java_lang_ref_SoftReference::_timestamp_offset;
4576 int java_lang_ref_SoftReference::_static_clock_offset;
4577
4578 #define SOFTREFERENCE_FIELDS_DO(macro) \
4579 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4580 macro(_static_clock_offset, k, "clock", long_signature, true)
4581
4582 void java_lang_ref_SoftReference::compute_offsets() {
4583 InstanceKlass* k = vmClasses::SoftReference_klass();
4584 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4585 }
4586
4587 #if INCLUDE_CDS
4588 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4589 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4590 }
4591 #endif
4592
4593 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4594 return ref->long_field(_timestamp_offset);
4595 }
4596
4597 jlong java_lang_ref_SoftReference::clock() {
4598 InstanceKlass* ik = vmClasses::SoftReference_klass();
4599 oop base = ik->static_field_base_raw();
4600 return base->long_field(_static_clock_offset);
4601 }
4602
4603 void java_lang_ref_SoftReference::set_clock(jlong value) {
4604 InstanceKlass* ik = vmClasses::SoftReference_klass();
4605 oop base = ik->static_field_base_raw();
4606 base->long_field_put(_static_clock_offset, value);
4607 }
4608
4609 // Support for java_lang_invoke_DirectMethodHandle
4610
4611 int java_lang_invoke_DirectMethodHandle::_member_offset;
4612
4613 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4614 oop member_name = nullptr;
4615 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4616 "a DirectMethodHandle oop is expected");
4617 return dmh->obj_field(_member_offset);
4618 }
4619
4620 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4621 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4622
4623 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4624 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4625 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4626 }
4627
4628 #if INCLUDE_CDS
4629 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4630 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4631 }
4632 #endif
4633
4634 // Support for java_lang_invoke_MethodHandle
4635
4636 int java_lang_invoke_MethodHandle::_type_offset;
4637 int java_lang_invoke_MethodHandle::_form_offset;
4638
4639 int java_lang_invoke_MemberName::_clazz_offset;
4640 int java_lang_invoke_MemberName::_name_offset;
4641 int java_lang_invoke_MemberName::_type_offset;
4642 int java_lang_invoke_MemberName::_flags_offset;
4643 int java_lang_invoke_MemberName::_method_offset;
4644 int java_lang_invoke_MemberName::_vmindex_offset;
4645
4646 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4647 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4648
4649 int java_lang_invoke_LambdaForm::_vmentry_offset;
4650
4651 #define METHODHANDLE_FIELDS_DO(macro) \
4652 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4653 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4654
4655 void java_lang_invoke_MethodHandle::compute_offsets() {
4656 InstanceKlass* k = vmClasses::MethodHandle_klass();
4657 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4658 }
4659
4660 #if INCLUDE_CDS
4661 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4662 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4663 }
4664 #endif
4665
4666 #define MEMBERNAME_FIELDS_DO(macro) \
4667 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4668 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4669 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4670 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4671 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4672
4673 void java_lang_invoke_MemberName::compute_offsets() {
4674 InstanceKlass* k = vmClasses::MemberName_klass();
4675 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4676 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4677 }
4678
4679 #if INCLUDE_CDS
4680 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4681 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4682 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4683 }
4684 #endif
4685
4686 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4687 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4688
4689 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4690 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4691 assert(k != nullptr, "jdk mismatch");
4692 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4693 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4694 }
4695
4696 #if INCLUDE_CDS
4697 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4698 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4699 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4700 }
4701 #endif
4702
4703 #define LAMBDAFORM_FIELDS_DO(macro) \
4704 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4705
4706 void java_lang_invoke_LambdaForm::compute_offsets() {
4707 InstanceKlass* k = vmClasses::LambdaForm_klass();
4708 assert (k != nullptr, "jdk mismatch");
4709 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4710 }
4711
4712 #if INCLUDE_CDS
4713 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4714 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4715 }
4716 #endif
4717
4718 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4719 return obj != nullptr && is_subclass(obj->klass());
4720 }
4721
4722 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4723 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4724
4725 #define NEP_FIELDS_DO(macro) \
4726 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4727 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4728
4729 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4730 return obj != nullptr && is_subclass(obj->klass());
4731 }
4732
4733 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4734 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4735 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4736 }
4737
4738 #if INCLUDE_CDS
4739 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4740 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4741 }
4742 #endif
4743
4744 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4745 return entry->obj_field(_method_type_offset);
4746 }
4747
4748 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4749 return entry->long_field(_downcall_stub_address_offset);
4750 }
4751
4752 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4753 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4754 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4755 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4756 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4757 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4758 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4759
4760 #define ABIDescriptor_FIELDS_DO(macro) \
4761 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4762 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4763 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4764 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4765 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4766 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4767 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4768
4769 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4770 return obj != nullptr && is_subclass(obj->klass());
4771 }
4772
4773 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4774 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4775 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4776 }
4777
4778 #if INCLUDE_CDS
4779 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4780 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4781 }
4782 #endif
4783
4784 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4785 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4786 }
4787
4788 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4789 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4790 }
4791
4792 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4793 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4794 }
4795
4796 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4797 return entry->int_field(_stackAlignment_offset);
4798 }
4799
4800 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4801 return entry->int_field(_shadowSpace_offset);
4802 }
4803
4804 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4805 return entry->obj_field(_scratch1_offset);
4806 }
4807
4808 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4809 return entry->obj_field(_scratch2_offset);
4810 }
4811
4812 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4813 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4814 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4815 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4816
4817 #define VMStorage_FIELDS_DO(macro) \
4818 macro(_type_offset, k, "type", byte_signature, false); \
4819 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4820 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4821 macro(_debugName_offset, k, "debugName", string_signature, false); \
4822
4823 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4824 return obj != nullptr && is_subclass(obj->klass());
4825 }
4826
4827 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4828 InstanceKlass* k = vmClasses::VMStorage_klass();
4829 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4830 }
4831
4832 #if INCLUDE_CDS
4833 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4834 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4835 }
4836 #endif
4837
4838 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4839 return entry->byte_field(_type_offset);
4840 }
4841
4842 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4843 return entry->int_field(_indexOrOffset_offset);
4844 }
4845
4846 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4847 return entry->short_field(_segmentMaskOrSize_offset);
4848 }
4849
4850 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4851 return entry->obj_field(_debugName_offset);
4852 }
4853
4854 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4855 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4856
4857 #define CallConv_FIELDS_DO(macro) \
4858 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4859 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4860
4861 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4862 return obj != nullptr && is_subclass(obj->klass());
4863 }
4864
4865 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4866 InstanceKlass* k = vmClasses::CallConv_klass();
4867 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4868 }
4869
4870 #if INCLUDE_CDS
4871 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4872 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4873 }
4874 #endif
4875
4876 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4877 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4878 }
4879
4880 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4881 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4882 }
4883
4884 oop java_lang_invoke_MethodHandle::type(oop mh) {
4885 return mh->obj_field(_type_offset);
4886 }
4887
4888 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4889 mh->obj_field_put(_type_offset, mtype);
4890 }
4891
4892 oop java_lang_invoke_MethodHandle::form(oop mh) {
4893 assert(_form_offset != 0, "");
4894 return mh->obj_field(_form_offset);
4895 }
4896
4897 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4898 assert(_form_offset != 0, "");
4899 mh->obj_field_put(_form_offset, lform);
4900 }
4901
4902 /// MemberName accessors
4903
4904 oop java_lang_invoke_MemberName::clazz(oop mname) {
4905 assert(is_instance(mname), "wrong type");
4906 return mname->obj_field(_clazz_offset);
4907 }
4908
4909 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4910 assert(is_instance(mname), "wrong type");
4911 mname->obj_field_put(_clazz_offset, clazz);
4912 }
4913
4914 oop java_lang_invoke_MemberName::name(oop mname) {
4915 assert(is_instance(mname), "wrong type");
4916 return mname->obj_field(_name_offset);
4917 }
4918
4919 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4920 assert(is_instance(mname), "wrong type");
4921 mname->obj_field_put(_name_offset, name);
4922 }
4923
4924 oop java_lang_invoke_MemberName::type(oop mname) {
4925 assert(is_instance(mname), "wrong type");
4926 return mname->obj_field(_type_offset);
4927 }
4928
4929 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4930 assert(is_instance(mname), "wrong type");
4931 mname->obj_field_put(_type_offset, type);
4932 }
4933
4934 int java_lang_invoke_MemberName::flags(oop mname) {
4935 assert(is_instance(mname), "wrong type");
4936 return mname->int_field(_flags_offset);
4937 }
4938
4939 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4940 assert(is_instance(mname), "wrong type");
4941 mname->int_field_put(_flags_offset, flags);
4942 }
4943
4944
4945 // Return vmtarget from ResolvedMethodName method field through indirection
4946 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4947 assert(is_instance(mname), "wrong type");
4948 oop method = mname->obj_field(_method_offset);
4949 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4950 }
4951
4952 bool java_lang_invoke_MemberName::is_method(oop mname) {
4953 assert(is_instance(mname), "must be MemberName");
4954 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4955 }
4956
4957 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4958 assert(is_instance(mname), "wrong type");
4959 mname->obj_field_put(_method_offset, resolved_method);
4960 }
4961
4962 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4963 assert(is_instance(mname), "wrong type");
4964 return (intptr_t) mname->address_field(_vmindex_offset);
4965 }
4966
4967 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4968 assert(is_instance(mname), "wrong type");
4969 mname->address_field_put(_vmindex_offset, (address) index);
4970 }
4971
4972
4973 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4974 assert(is_instance(resolved_method), "wrong type");
4975 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4976 assert(m->is_method(), "must be");
4977 return m;
4978 }
4979
4980 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4981 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4982 assert(is_instance(resolved_method), "wrong type");
4983 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4984 }
4985
4986 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4987 assert(is_instance(resolved_method), "wrong type");
4988 resolved_method->obj_field_put(_vmholder_offset, holder);
4989 }
4990
4991 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4992 const Method* method = m();
4993
4994 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4995 oop resolved_method = ResolvedMethodTable::find_method(method);
4996 if (resolved_method != nullptr) {
4997 return resolved_method;
4998 }
4999
5000 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
5001 if (!k->is_initialized()) {
5002 k->initialize(CHECK_NULL);
5003 }
5004
5005 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
5006
5007 NoSafepointVerifier nsv;
5008
5009 if (method->is_old()) {
5010 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
5011 method->get_new_method();
5012 }
5013
5014 InstanceKlass* holder = method->method_holder();
5015
5016 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
5017 // Add a reference to the loader (actually mirror because hidden classes may not have
5018 // distinct loaders) to ensure the metadata is kept alive.
5019 // This mirror may be different than the one in clazz field.
5020 set_vmholder(new_resolved_method, holder->java_mirror());
5021
5022 // Set flag in class to indicate this InstanceKlass has entries in the table
5023 // to avoid walking table during redefinition if none of the redefined classes
5024 // have any membernames in the table.
5025 holder->set_has_resolved_methods();
5026
5027 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
5028 }
5029
5030 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
5031 assert(is_instance(lform), "wrong type");
5032 return lform->obj_field(_vmentry_offset);
5033 }
5034
5035
5036 // Support for java_lang_invoke_MethodType
5037
5038 int java_lang_invoke_MethodType::_rtype_offset;
5039 int java_lang_invoke_MethodType::_ptypes_offset;
5040
5041 #define METHODTYPE_FIELDS_DO(macro) \
5042 macro(_rtype_offset, k, "rtype", class_signature, false); \
5043 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
5044
5045 void java_lang_invoke_MethodType::compute_offsets() {
5046 InstanceKlass* k = vmClasses::MethodType_klass();
5047 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5048 }
5049
5050 #if INCLUDE_CDS
5051 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
5052 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5053 }
5054 #endif
5055
5056 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
5057 st->print("(");
5058 objArrayOop pts = ptypes(mt);
5059 if (pts != nullptr) {
5060 for (int i = 0, limit = pts->length(); i < limit; i++) {
5061 java_lang_Class::print_signature(pts->obj_at(i), st);
5062 }
5063 } else {
5064 st->print("null");
5065 }
5066 st->print(")");
5067 oop rt = rtype(mt);
5068 if (rt != nullptr) {
5069 java_lang_Class::print_signature(rt, st);
5070 } else {
5071 st->print("null");
5072 }
5073 }
5074
5075 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
5076 ResourceMark rm;
5077 stringStream buffer(128);
5078 print_signature(mt, &buffer);
5079 const char* sigstr = buffer.base();
5080 int siglen = (int) buffer.size();
5081 Symbol *name;
5082 if (!intern_if_not_found) {
5083 name = SymbolTable::probe(sigstr, siglen);
5084 } else {
5085 name = SymbolTable::new_symbol(sigstr, siglen);
5086 }
5087 return name;
5088 }
5089
5090 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
5091 if (mt1 == mt2)
5092 return true;
5093 if (rtype(mt1) != rtype(mt2))
5094 return false;
5095 if (ptype_count(mt1) != ptype_count(mt2))
5096 return false;
5097 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
5098 if (ptype(mt1, i) != ptype(mt2, i))
5099 return false;
5100 }
5101 return true;
5102 }
5103
5104 oop java_lang_invoke_MethodType::rtype(oop mt) {
5105 assert(is_instance(mt), "must be a MethodType");
5106 return mt->obj_field(_rtype_offset);
5107 }
5108
5109 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
5110 assert(is_instance(mt), "must be a MethodType");
5111 return (objArrayOop) mt->obj_field(_ptypes_offset);
5112 }
5113
5114 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
5115 return ptypes(mt)->obj_at(idx);
5116 }
5117
5118 int java_lang_invoke_MethodType::ptype_count(oop mt) {
5119 return ptypes(mt)->length();
5120 }
5121
5122 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
5123 objArrayOop pts = ptypes(mt);
5124 int count = pts->length();
5125 int slots = 0;
5126 for (int i = 0; i < count; i++) {
5127 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
5128 slots += type2size[bt];
5129 }
5130 return slots;
5131 }
5132
5133 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
5134 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
5135 return type2size[bt];
5136 }
5137
5138
5139 // Support for java_lang_invoke_CallSite
5140
5141 int java_lang_invoke_CallSite::_target_offset;
5142 int java_lang_invoke_CallSite::_vmdependencies_offset;
5143 int java_lang_invoke_CallSite::_last_cleanup_offset;
5144
5145 #define CALLSITE_FIELDS_DO(macro) \
5146 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
5147
5148 void java_lang_invoke_CallSite::compute_offsets() {
5149 InstanceKlass* k = vmClasses::CallSite_klass();
5150 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5151 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5152 }
5153
5154 #if INCLUDE_CDS
5155 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
5156 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5157 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5158 }
5159 #endif
5160
5161 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
5162 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
5163 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
5164 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
5165 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
5166 return dep_ctx;
5167 }
5168
5169 // Support for java_lang_invoke_ConstantCallSite
5170
5171 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
5172
5173 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
5174 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
5175
5176 void java_lang_invoke_ConstantCallSite::compute_offsets() {
5177 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
5178 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5179 }
5180
5181 #if INCLUDE_CDS
5182 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
5183 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5184 }
5185 #endif
5186
5187 // Support for java_lang_ClassLoader
5188
5189 int java_lang_ClassLoader::_loader_data_offset;
5190 int java_lang_ClassLoader::_parallelCapable_offset;
5191 int java_lang_ClassLoader::_name_offset;
5192 int java_lang_ClassLoader::_nameAndId_offset;
5193 int java_lang_ClassLoader::_unnamedModule_offset;
5194 int java_lang_ClassLoader::_parent_offset;
5195
5196 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
5197 assert(loader != nullptr, "loader must not be null");
5198 assert(oopDesc::is_oop(loader), "loader must be oop");
5199 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
5200 }
5201
5202 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
5203 assert(loader != nullptr, "loader must not be null");
5204 assert(oopDesc::is_oop(loader), "loader must be oop");
5205 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
5206 }
5207
5208 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
5209 assert(loader != nullptr, "loader must not be null");
5210 assert(oopDesc::is_oop(loader), "loader must be oop");
5211 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
5212 }
5213
5214 #define CLASSLOADER_FIELDS_DO(macro) \
5215 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
5216 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
5217 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
5218 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
5219 macro(_parent_offset, k1, "parent", classloader_signature, false)
5220
5221 void java_lang_ClassLoader::compute_offsets() {
5222 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
5223 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5224
5225 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5226 }
5227
5228 #if INCLUDE_CDS
5229 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
5230 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5231 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5232 }
5233 #endif
5234
5235 oop java_lang_ClassLoader::parent(oop loader) {
5236 assert(is_instance(loader), "loader must be oop");
5237 return loader->obj_field(_parent_offset);
5238 }
5239
5240 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
5241 assert(is_instance(loader), "loader must be oop");
5242 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
5243 }
5244
5245 // Returns the name field of this class loader. If the name field has not
5246 // been set, null will be returned.
5247 oop java_lang_ClassLoader::name(oop loader) {
5248 assert(is_instance(loader), "loader must be oop");
5249 return loader->obj_field(_name_offset);
5250 }
5251
5252 // Returns the nameAndId field of this class loader. The format is
5253 // as follows:
5254 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
5255 // If the defining loader has no name then <qualified-class-name> @<id>
5256 // If built-in loader, then omit '@<id>' as there is only one instance.
5257 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
5258 oop java_lang_ClassLoader::nameAndId(oop loader) {
5259 assert(is_instance(loader), "loader must be oop");
5260 return loader->obj_field(_nameAndId_offset);
5261 }
5262
5263 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
5264 assert(is_instance(loader), "loader must be oop");
5265 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
5266 oop acl = loader;
5267 DEBUG_ONLY(jint loop_count = 0);
5268 // This loop taken verbatim from ClassLoader.java:
5269 do {
5270 acl = parent(acl);
5271 if (cl == acl) {
5272 return true;
5273 }
5274 assert(++loop_count > 0, "loop_count overflow");
5275 } while (acl != nullptr);
5276 return false;
5277 }
5278
5279 bool java_lang_ClassLoader::is_instance(oop obj) {
5280 return obj != nullptr && is_subclass(obj->klass());
5281 }
5282
5283
5284 // For class loader classes, parallelCapable defined
5285 // based on non-null field
5286 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
5287 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
5288 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
5289 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
5290 }
5291
5292 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
5293 oop cl = SystemDictionary::java_system_loader();
5294 while(cl != nullptr) {
5295 if (cl == loader) return true;
5296 cl = parent(cl);
5297 }
5298 return false;
5299 }
5300
5301 oop java_lang_ClassLoader::unnamedModule(oop loader) {
5302 assert(is_instance(loader), "loader must be oop");
5303 return loader->obj_field(_unnamedModule_offset);
5304 }
5305
5306 // Support for java_lang_System
5307 //
5308
5309 int java_lang_System::_static_in_offset;
5310 int java_lang_System::_static_out_offset;
5311 int java_lang_System::_static_err_offset;
5312
5313 #define SYSTEM_FIELDS_DO(macro) \
5314 macro(_static_in_offset, k, "in", input_stream_signature, true); \
5315 macro(_static_out_offset, k, "out", print_stream_signature, true); \
5316 macro(_static_err_offset, k, "err", print_stream_signature, true);
5317
5318 void java_lang_System::compute_offsets() {
5319 InstanceKlass* k = vmClasses::System_klass();
5320 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5321 }
5322
5323 #if INCLUDE_CDS
5324 void java_lang_System::serialize_offsets(SerializeClosure* f) {
5325 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5326 }
5327 #endif
5328
5329 // Support for jdk_internal_misc_UnsafeConstants
5330 //
5331 class UnsafeConstantsFixup : public FieldClosure {
5332 private:
5333 int _address_size;
5334 int _page_size;
5335 bool _big_endian;
5336 bool _use_unaligned_access;
5337 int _data_cache_line_flush_size;
5338 public:
5339 UnsafeConstantsFixup() {
5340 // round up values for all static final fields
5341 _address_size = sizeof(void*);
5342 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
5343 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
5344 _use_unaligned_access = UseUnalignedAccesses;
5345 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
5346 }
5347
5348 void do_field(fieldDescriptor* fd) {
5349 oop mirror = fd->field_holder()->java_mirror();
5350 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
5351 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
5352 assert(fd->is_final(), "fields of UnsafeConstants must be final");
5353 assert(fd->is_static(), "fields of UnsafeConstants must be static");
5354 if (fd->name() == vmSymbols::address_size_name()) {
5355 mirror->int_field_put(fd->offset(), _address_size);
5356 } else if (fd->name() == vmSymbols::page_size_name()) {
5357 mirror->int_field_put(fd->offset(), _page_size);
5358 } else if (fd->name() == vmSymbols::big_endian_name()) {
5359 mirror->bool_field_put(fd->offset(), _big_endian);
5360 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
5361 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
5362 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
5363 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
5364 } else {
5365 assert(false, "unexpected UnsafeConstants field");
5366 }
5367 }
5368 };
5369
5370 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
5371 UnsafeConstantsFixup fixup;
5372 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
5373 }
5374
5375
5376 // java_lang_StackTraceElement
5377
5378 int java_lang_StackTraceElement::_methodName_offset;
5379 int java_lang_StackTraceElement::_fileName_offset;
5380 int java_lang_StackTraceElement::_lineNumber_offset;
5381 int java_lang_StackTraceElement::_moduleName_offset;
5382 int java_lang_StackTraceElement::_moduleVersion_offset;
5383 int java_lang_StackTraceElement::_classLoaderName_offset;
5384 int java_lang_StackTraceElement::_declaringClass_offset;
5385 int java_lang_StackTraceElement::_declaringClassObject_offset;
5386
5387 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
5388 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
5389 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
5390 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
5391 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
5392 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
5393 macro(_methodName_offset, k, "methodName", string_signature, false); \
5394 macro(_fileName_offset, k, "fileName", string_signature, false); \
5395 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
5396
5397 // Support for java_lang_StackTraceElement
5398 void java_lang_StackTraceElement::compute_offsets() {
5399 InstanceKlass* k = vmClasses::StackTraceElement_klass();
5400 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5401 }
5402
5403 #if INCLUDE_CDS
5404 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
5405 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5406 }
5407 #endif
5408
5409 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
5410 element->obj_field_put(_fileName_offset, value);
5411 }
5412
5413 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
5414 element->obj_field_put(_declaringClass_offset, value);
5415 }
5416
5417 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5418 element->obj_field_put(_methodName_offset, value);
5419 }
5420
5421 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5422 element->int_field_put(_lineNumber_offset, value);
5423 }
5424
5425 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5426 element->obj_field_put(_moduleName_offset, value);
5427 }
5428
5429 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5430 element->obj_field_put(_moduleVersion_offset, value);
5431 }
5432
5433 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5434 element->obj_field_put(_classLoaderName_offset, value);
5435 }
5436
5437 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5438 element->obj_field_put(_declaringClassObject_offset, value);
5439 }
5440
5441
5442 // java_lang_AssertionStatusDirectives
5443
5444 int java_lang_AssertionStatusDirectives::_classes_offset;
5445 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5446 int java_lang_AssertionStatusDirectives::_packages_offset;
5447 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5448 int java_lang_AssertionStatusDirectives::_deflt_offset;
5449
5450 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5451 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5452 macro(_classes_offset, k, "classes", string_array_signature, false); \
5453 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5454 macro(_packages_offset, k, "packages", string_array_signature, false); \
5455 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5456 macro(_deflt_offset, k, "deflt", bool_signature, false)
5457
5458 void java_lang_AssertionStatusDirectives::compute_offsets() {
5459 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5460 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5461 }
5462
5463 #if INCLUDE_CDS
5464 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5465 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5466 }
5467 #endif
5468
5469 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5470 o->obj_field_put(_classes_offset, val);
5471 }
5472
5473 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5474 o->obj_field_put(_classEnabled_offset, val);
5475 }
5476
5477 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5478 o->obj_field_put(_packages_offset, val);
5479 }
5480
5481 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5482 o->obj_field_put(_packageEnabled_offset, val);
5483 }
5484
5485 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5486 o->bool_field_put(_deflt_offset, val);
5487 }
5488
5489 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5490
5491 #define AOS_FIELDS_DO(macro) \
5492 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5493
5494 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5495 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5496 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5497 }
5498
5499 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5500 assert(_owner_offset != 0, "Must be initialized");
5501 return obj->obj_field_acquire(_owner_offset);
5502 }
5503
5504 #if INCLUDE_CDS
5505 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5506 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5507 }
5508 #endif
5509
5510 int vector_VectorPayload::_payload_offset;
5511
5512 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5513 macro(_payload_offset, k, "payload", object_signature, false)
5514
5515 void vector_VectorPayload::compute_offsets() {
5516 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5517 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5518 }
5519
5520 #if INCLUDE_CDS
5521 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5522 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5523 }
5524 #endif
5525
5526 void vector_VectorPayload::set_payload(oop o, oop val) {
5527 o->obj_field_put(_payload_offset, val);
5528 }
5529
5530 bool vector_VectorPayload::is_instance(oop obj) {
5531 return obj != nullptr && is_subclass(obj->klass());
5532 }
5533
5534 int java_lang_Integer_IntegerCache::_static_cache_offset;
5535 int java_lang_Long_LongCache::_static_cache_offset;
5536 int java_lang_Character_CharacterCache::_static_cache_offset;
5537 int java_lang_Short_ShortCache::_static_cache_offset;
5538 int java_lang_Byte_ByteCache::_static_cache_offset;
5539
5540 #define INTEGER_CACHE_FIELDS_DO(macro) \
5541 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5542
5543 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5544 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5545 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5546 }
5547
5548 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5549 oop base = ik->static_field_base_raw();
5550 return objArrayOop(base->obj_field(_static_cache_offset));
5551 }
5552
5553 Symbol* java_lang_Integer_IntegerCache::symbol() {
5554 return vmSymbols::java_lang_Integer_IntegerCache();
5555 }
5556
5557 #if INCLUDE_CDS
5558 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5559 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5560 }
5561 #endif
5562 #undef INTEGER_CACHE_FIELDS_DO
5563
5564 jint java_lang_Integer::value(oop obj) {
5565 jvalue v;
5566 java_lang_boxing_object::get_value(obj, &v);
5567 return v.i;
5568 }
5569
5570 #define LONG_CACHE_FIELDS_DO(macro) \
5571 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5572
5573 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5574 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5575 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5576 }
5577
5578 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5579 oop base = ik->static_field_base_raw();
5580 return objArrayOop(base->obj_field(_static_cache_offset));
5581 }
5582
5583 Symbol* java_lang_Long_LongCache::symbol() {
5584 return vmSymbols::java_lang_Long_LongCache();
5585 }
5586
5587 #if INCLUDE_CDS
5588 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5589 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5590 }
5591 #endif
5592 #undef LONG_CACHE_FIELDS_DO
5593
5594 jlong java_lang_Long::value(oop obj) {
5595 jvalue v;
5596 java_lang_boxing_object::get_value(obj, &v);
5597 return v.j;
5598 }
5599
5600 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5601 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5602
5603 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5604 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5605 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5606 }
5607
5608 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5609 oop base = ik->static_field_base_raw();
5610 return objArrayOop(base->obj_field(_static_cache_offset));
5611 }
5612
5613 Symbol* java_lang_Character_CharacterCache::symbol() {
5614 return vmSymbols::java_lang_Character_CharacterCache();
5615 }
5616
5617 #if INCLUDE_CDS
5618 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5619 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5620 }
5621 #endif
5622 #undef CHARACTER_CACHE_FIELDS_DO
5623
5624 jchar java_lang_Character::value(oop obj) {
5625 jvalue v;
5626 java_lang_boxing_object::get_value(obj, &v);
5627 return v.c;
5628 }
5629
5630 #define SHORT_CACHE_FIELDS_DO(macro) \
5631 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5632
5633 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5634 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5635 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5636 }
5637
5638 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5639 oop base = ik->static_field_base_raw();
5640 return objArrayOop(base->obj_field(_static_cache_offset));
5641 }
5642
5643 Symbol* java_lang_Short_ShortCache::symbol() {
5644 return vmSymbols::java_lang_Short_ShortCache();
5645 }
5646
5647 #if INCLUDE_CDS
5648 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5649 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5650 }
5651 #endif
5652 #undef SHORT_CACHE_FIELDS_DO
5653
5654 jshort java_lang_Short::value(oop obj) {
5655 jvalue v;
5656 java_lang_boxing_object::get_value(obj, &v);
5657 return v.s;
5658 }
5659
5660 #define BYTE_CACHE_FIELDS_DO(macro) \
5661 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5662
5663 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5664 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5665 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5666 }
5667
5668 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5669 oop base = ik->static_field_base_raw();
5670 return objArrayOop(base->obj_field(_static_cache_offset));
5671 }
5672
5673 Symbol* java_lang_Byte_ByteCache::symbol() {
5674 return vmSymbols::java_lang_Byte_ByteCache();
5675 }
5676
5677 #if INCLUDE_CDS
5678 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5679 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5680 }
5681 #endif
5682 #undef BYTE_CACHE_FIELDS_DO
5683
5684 jbyte java_lang_Byte::value(oop obj) {
5685 jvalue v;
5686 java_lang_boxing_object::get_value(obj, &v);
5687 return v.b;
5688 }
5689
5690 int java_lang_Boolean::_static_TRUE_offset;
5691 int java_lang_Boolean::_static_FALSE_offset;
5692
5693 #define BOOLEAN_FIELDS_DO(macro) \
5694 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5695 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5696
5697
5698 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5699 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5700 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5701 }
5702
5703 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5704 oop base = ik->static_field_base_raw();
5705 return base->obj_field(_static_TRUE_offset);
5706 }
5707
5708 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5709 oop base = ik->static_field_base_raw();
5710 return base->obj_field(_static_FALSE_offset);
5711 }
5712
5713 Symbol* java_lang_Boolean::symbol() {
5714 return vmSymbols::java_lang_Boolean();
5715 }
5716
5717 #if INCLUDE_CDS
5718 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5719 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5720 }
5721 #endif
5722 #undef BOOLEAN_CACHE_FIELDS_DO
5723
5724 jboolean java_lang_Boolean::value(oop obj) {
5725 jvalue v;
5726 java_lang_boxing_object::get_value(obj, &v);
5727 return v.z;
5728 }
5729
5730 // java_lang_reflect_RecordComponent
5731
5732 int java_lang_reflect_RecordComponent::_clazz_offset;
5733 int java_lang_reflect_RecordComponent::_name_offset;
5734 int java_lang_reflect_RecordComponent::_type_offset;
5735 int java_lang_reflect_RecordComponent::_accessor_offset;
5736 int java_lang_reflect_RecordComponent::_signature_offset;
5737 int java_lang_reflect_RecordComponent::_annotations_offset;
5738 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5739
5740 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5741 macro(_clazz_offset, k, "clazz", class_signature, false); \
5742 macro(_name_offset, k, "name", string_signature, false); \
5743 macro(_type_offset, k, "type", class_signature, false); \
5744 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5745 macro(_signature_offset, k, "signature", string_signature, false); \
5746 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5747 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5748
5749 // Support for java_lang_reflect_RecordComponent
5750 void java_lang_reflect_RecordComponent::compute_offsets() {
5751 InstanceKlass* k = vmClasses::RecordComponent_klass();
5752 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5753 }
5754
5755 #if INCLUDE_CDS
5756 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5757 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5758 }
5759 #endif
5760
5761 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5762 element->obj_field_put(_clazz_offset, value);
5763 }
5764
5765 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5766 element->obj_field_put(_name_offset, value);
5767 }
5768
5769 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5770 element->obj_field_put(_type_offset, value);
5771 }
5772
5773 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5774 element->obj_field_put(_accessor_offset, value);
5775 }
5776
5777 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5778 element->obj_field_put(_signature_offset, value);
5779 }
5780
5781 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5782 element->obj_field_put(_annotations_offset, value);
5783 }
5784
5785 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5786 element->obj_field_put(_typeAnnotations_offset, value);
5787 }
5788
5789 // java_lang_InternalError
5790 int java_lang_InternalError::_during_unsafe_access_offset;
5791
5792 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5793 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5794 }
5795
5796 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5797 return internal_error->bool_field(_during_unsafe_access_offset);
5798 }
5799
5800 void java_lang_InternalError::compute_offsets() {
5801 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5802 }
5803
5804 #if INCLUDE_CDS
5805 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5806 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5807 }
5808 #endif
5809
5810 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5811 f(java_lang_Class) \
5812 f(java_lang_String) \
5813 f(java_lang_ref_Reference) \
5814 //end
5815
5816 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5817 f(java_lang_System) \
5818 f(java_lang_ClassLoader) \
5819 f(java_lang_Throwable) \
5820 f(java_lang_Thread) \
5821 f(java_lang_Thread_FieldHolder) \
5822 f(java_lang_Thread_Constants) \
5823 f(java_lang_ThreadGroup) \
5824 f(java_lang_VirtualThread) \
5825 f(java_lang_InternalError) \
5826 f(java_lang_AssertionStatusDirectives) \
5827 f(java_lang_ref_SoftReference) \
5828 f(java_lang_invoke_MethodHandle) \
5829 f(java_lang_invoke_DirectMethodHandle) \
5830 f(java_lang_invoke_MemberName) \
5831 f(java_lang_invoke_ResolvedMethodName) \
5832 f(java_lang_invoke_LambdaForm) \
5833 f(java_lang_invoke_MethodType) \
5834 f(java_lang_invoke_CallSite) \
5835 f(java_lang_invoke_ConstantCallSite) \
5836 f(java_lang_reflect_AccessibleObject) \
5837 f(java_lang_reflect_Method) \
5838 f(java_lang_reflect_Constructor) \
5839 f(java_lang_reflect_Field) \
5840 f(java_lang_reflect_RecordComponent) \
5841 f(reflect_ConstantPool) \
5842 f(java_lang_reflect_Parameter) \
5843 f(java_lang_Module) \
5844 f(java_lang_StackTraceElement) \
5845 f(java_lang_ClassFrameInfo) \
5846 f(java_lang_StackFrameInfo) \
5847 f(java_lang_LiveStackFrameInfo) \
5848 f(jdk_internal_vm_ContinuationScope) \
5849 f(jdk_internal_vm_Continuation) \
5850 f(jdk_internal_vm_StackChunk) \
5851 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5852 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5853 f(jdk_internal_foreign_abi_ABIDescriptor) \
5854 f(jdk_internal_foreign_abi_VMStorage) \
5855 f(jdk_internal_foreign_abi_CallConv) \
5856 f(jdk_internal_misc_UnsafeConstants) \
5857 f(java_lang_boxing_object) \
5858 f(vector_VectorPayload) \
5859 //end
5860
5861 #define BASIC_JAVA_CLASSES_DO(f) \
5862 BASIC_JAVA_CLASSES_DO_PART1(f) \
5863 BASIC_JAVA_CLASSES_DO_PART2(f)
5864
5865 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5866
5867 // Compute field offsets of all the classes in this file
5868 void JavaClasses::compute_offsets() {
5869 if (CDSConfig::is_using_archive()) {
5870 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5871 JvmtiExport::has_early_class_hook_env()),
5872 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5873 // None of the classes used by the rest of this function can be replaced by
5874 // JVMTI ClassFileLoadHook.
5875 // We are safe to use the archived offsets, which have already been restored
5876 // by JavaClasses::serialize_offsets, without computing the offsets again.
5877 return;
5878 }
5879
5880 // We have already called the compute_offsets() of the
5881 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5882 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5883 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5884 }
5885
5886 #if INCLUDE_CDS
5887 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5888
5889 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5890 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5891 }
5892 #endif
5893
5894 #if INCLUDE_CDS_JAVA_HEAP
5895 bool JavaClasses::is_supported_for_archiving(oop obj) {
5896 Klass* klass = obj->klass();
5897
5898 if (!CDSConfig::is_dumping_method_handles()) {
5899 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5900 if (klass == vmClasses::ResolvedMethodName_klass() ||
5901 klass == vmClasses::MemberName_klass()) {
5902 return false;
5903 }
5904 }
5905
5906 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5907 return false;
5908 }
5909
5910 return true;
5911 }
5912 #endif
5913
5914 #ifndef PRODUCT
5915
5916 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5917
5918 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5919 const char* field_sig) {
5920 EXCEPTION_MARK;
5921 fieldDescriptor fd;
5922 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5923 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5924 InstanceKlass* ik = InstanceKlass::cast(k);
5925 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5926 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5927 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5928 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5929 return false;
5930 }
5931 if (fd.is_static()) {
5932 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5933 return false;
5934 }
5935 if (fd.offset() == deserialized_offset ) {
5936 return true;
5937 } else {
5938 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5939 klass_name, field_name, deserialized_offset, fd.offset());
5940 return false;
5941 }
5942 }
5943
5944 void JavaClasses::check_offsets() {
5945 bool valid = true;
5946
5947 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5948 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5949
5950 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5951 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5952
5953 // Boxed primitive objects (java_lang_boxing_object)
5954
5955 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5956 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5957 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5958 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5959 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5960 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5961 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5962 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5963
5964 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5965 }
5966
5967 #endif // PRODUCT
5968
5969 int InjectedField::compute_offset() {
5970 InstanceKlass* ik = InstanceKlass::cast(klass());
5971 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5972 if (!may_be_java && !fs.field_flags().is_injected()) {
5973 // Only look at injected fields
5974 continue;
5975 }
5976 if (fs.name() == name() && fs.signature() == signature()) {
5977 return fs.offset();
5978 }
5979 }
5980 ResourceMark rm;
5981 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)" : "");
5982 #ifndef PRODUCT
5983 ik->print();
5984 tty->print_cr("all fields:");
5985 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5986 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_field_flags());
5987 }
5988 #endif //PRODUCT
5989 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5990 return -1;
5991 }
5992
5993 void javaClasses_init() {
5994 JavaClasses::compute_offsets();
5995 JavaClasses::check_offsets();
5996 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5997 }