1 /*
2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/archiveBuilder.hpp"
27 #include "cds/archiveHeapLoader.hpp"
28 #include "cds/cdsConfig.hpp"
29 #include "cds/heapShared.hpp"
30 #include "cds/metaspaceShared.hpp"
31 #include "classfile/altHashing.hpp"
32 #include "classfile/classLoaderData.inline.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/javaClassesImpl.hpp"
35 #include "classfile/javaThreadStatus.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "code/debugInfo.hpp"
43 #include "code/dependencyContext.hpp"
44 #include "code/pcDesc.hpp"
45 #include "gc/shared/collectedHeap.inline.hpp"
46 #include "interpreter/interpreter.hpp"
47 #include "interpreter/linkResolver.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "logging/logStream.hpp"
51 #include "memory/oopFactory.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/fieldInfo.hpp"
55 #include "oops/fieldStreams.inline.hpp"
56 #include "oops/instanceKlass.inline.hpp"
57 #include "oops/instanceMirrorKlass.hpp"
58 #include "oops/klass.hpp"
59 #include "oops/klass.inline.hpp"
60 #include "oops/method.inline.hpp"
61 #include "oops/objArrayKlass.hpp"
62 #include "oops/objArrayOop.inline.hpp"
63 #include "oops/oopCast.inline.hpp"
64 #include "oops/oop.inline.hpp"
65 #include "oops/symbol.hpp"
66 #include "oops/recordComponent.hpp"
67 #include "oops/typeArrayOop.inline.hpp"
68 #include "prims/jvmtiExport.hpp"
69 #include "prims/methodHandles.hpp"
70 #include "prims/resolvedMethodTable.hpp"
71 #include "runtime/continuationEntry.inline.hpp"
72 #include "runtime/continuationJavaClasses.inline.hpp"
73 #include "runtime/fieldDescriptor.inline.hpp"
74 #include "runtime/frame.inline.hpp"
75 #include "runtime/handles.inline.hpp"
76 #include "runtime/handshake.hpp"
77 #include "runtime/init.hpp"
78 #include "runtime/interfaceSupport.inline.hpp"
79 #include "runtime/java.hpp"
80 #include "runtime/javaCalls.hpp"
81 #include "runtime/javaThread.hpp"
82 #include "runtime/jniHandles.inline.hpp"
83 #include "runtime/reflectionUtils.hpp"
84 #include "runtime/safepoint.hpp"
85 #include "runtime/safepointVerifiers.hpp"
86 #include "runtime/threadSMR.hpp"
87 #include "runtime/vframe.inline.hpp"
88 #include "runtime/vm_version.hpp"
89 #include "utilities/align.hpp"
90 #include "utilities/globalDefinitions.hpp"
91 #include "utilities/growableArray.hpp"
92 #include "utilities/preserveException.hpp"
93 #include "utilities/utf8.hpp"
94 #if INCLUDE_JVMCI
95 #include "jvmci/jvmciJavaClasses.hpp"
96 #endif
97
98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
100
101 InjectedField JavaClasses::_injected_fields[] = {
102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
103 };
104
105 // Register native methods of Object
106 void java_lang_Object::register_natives(TRAPS) {
107 InstanceKlass* obj = vmClasses::Object_klass();
108 Method::register_native(obj, vmSymbols::hashCode_name(),
109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
110 Method::register_native(obj, vmSymbols::wait_name(),
111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
112 Method::register_native(obj, vmSymbols::notify_name(),
113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
114 Method::register_native(obj, vmSymbols::notifyAll_name(),
115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
116 Method::register_native(obj, vmSymbols::clone_name(),
117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
118 }
119
120 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
121 return _injected_fields[(int)id].compute_offset();
122 }
123
124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
125 *field_count = 0;
126
127 vmSymbolID sid = vmSymbols::find_sid(class_name);
128 if (sid == vmSymbolID::NO_SID) {
129 // Only well known classes can inject fields
130 return nullptr;
131 }
132
133 int count = 0;
134 int start = -1;
135
136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
138 count++; \
139 if (start == -1) { \
140 start = (int)InjectedFieldID::klass##_##name##_enum; \
141 } \
142 }
143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
144 #undef LOOKUP_INJECTED_FIELD
145
146 if (start != -1) {
147 *field_count = count;
148 return _injected_fields + start;
149 }
150 return nullptr;
151 }
152
153
154 // Helpful routine for computing field offsets at run time rather than hardcoding them
155 // Finds local fields only, including static fields. Static field offsets are from the
156 // beginning of the mirror.
157 void JavaClasses::compute_offset(int &dest_offset,
158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
159 bool is_static) {
160 fieldDescriptor fd;
161 if (ik == nullptr) {
162 ResourceMark rm;
163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
164 vm_exit_during_initialization("Invalid layout of well-known class");
165 }
166
167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
168 ResourceMark rm;
169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
170 name_symbol->as_C_string(), signature_symbol->as_C_string());
171 #ifndef PRODUCT
172 // Prints all fields and offsets
173 Log(class) lt;
174 LogStream ls(lt.error());
175 ik->print_on(&ls);
176 #endif //PRODUCT
177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
178 }
179 dest_offset = fd.offset();
180 }
181
182 // Overloading to pass name as a string.
183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
184 const char* name_string, Symbol* signature_symbol,
185 bool is_static) {
186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
187 if (name == nullptr) {
188 ResourceMark rm;
189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
191 }
192 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
193 }
194
195 // java_lang_String
196
197 int java_lang_String::_value_offset;
198 int java_lang_String::_hash_offset;
199 int java_lang_String::_hashIsZero_offset;
200 int java_lang_String::_coder_offset;
201 int java_lang_String::_flags_offset;
202
203 bool java_lang_String::_initialized;
204
205
206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
207 uint8_t* addr = flags_addr(java_string);
208 uint8_t value = Atomic::load(addr);
209 while ((value & flag_mask) == 0) {
210 uint8_t old_value = value;
211 value |= flag_mask;
212 value = Atomic::cmpxchg(addr, old_value, value);
213 if (value == old_value) return false; // Flag bit changed from 0 to 1.
214 }
215 return true; // Flag bit is already 1.
216 }
217
218 #define STRING_FIELDS_DO(macro) \
219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
220 macro(_hash_offset, k, "hash", int_signature, false); \
221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
222 macro(_coder_offset, k, "coder", byte_signature, false);
223
224 void java_lang_String::compute_offsets() {
225 if (_initialized) {
226 return;
227 }
228
229 InstanceKlass* k = vmClasses::String_klass();
230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
232
233 _initialized = true;
234 }
235
236 #if INCLUDE_CDS
237 void java_lang_String::serialize_offsets(SerializeClosure* f) {
238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
240 f->do_bool(&_initialized);
241 }
242 #endif
243
244 class CompactStringsFixup : public FieldClosure {
245 private:
246 bool _value;
247
248 public:
249 CompactStringsFixup(bool value) : _value(value) {}
250
251 void do_field(fieldDescriptor* fd) {
252 if (fd->name() == vmSymbols::compact_strings_name()) {
253 oop mirror = fd->field_holder()->java_mirror();
254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
255 assert(mirror != nullptr, "String must have mirror already");
256 mirror->bool_field_put(fd->offset(), _value);
257 }
258 }
259 };
260
261 void java_lang_String::set_compact_strings(bool value) {
262 CompactStringsFixup fix(value);
263 vmClasses::String_klass()->do_local_static_fields(&fix);
264 }
265
266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
267 assert(_initialized, "Must be initialized");
268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
269
270 // Create the String object first, so there's a chance that the String
271 // and the char array it points to end up in the same cache line.
272 oop obj;
273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
274
275 // Create the char array. The String object must be handlized here
276 // because GC can happen as a result of the allocation attempt.
277 Handle h_obj(THREAD, obj);
278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
280
281 // Point the String at the char array
282 obj = h_obj();
283 set_value(obj, buffer);
284 // No need to zero the offset, allocation zero'ed the entire String object
285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
286 return h_obj;
287 }
288
289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
292 typeArrayOop buffer = value(h_obj());
293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
294 if (is_latin1) {
295 for (int index = 0; index < length; index++) {
296 buffer->byte_at_put(index, (jbyte)unicode[index]);
297 }
298 } else {
299 for (int index = 0; index < length; index++) {
300 buffer->char_at_put(index, unicode[index]);
301 }
302 }
303
304 #ifdef ASSERT
305 {
306 ResourceMark rm;
307 char* expected = UNICODE::as_utf8(unicode, length);
308 char* actual = as_utf8_string(h_obj());
309 if (strcmp(expected, actual) != 0) {
310 fatal("Unicode conversion failure: %s --> %s", expected, actual);
311 }
312 }
313 #endif
314
315 return h_obj;
316 }
317
318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
319 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
320 return h_obj();
321 }
322
323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
324 if (utf8_str == nullptr) {
325 return Handle();
326 }
327 bool has_multibyte, is_latin1;
328 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
329 if (!CompactStrings) {
330 has_multibyte = true;
331 is_latin1 = false;
332 }
333
334 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
335 if (length > 0) {
336 if (!has_multibyte) {
337 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
338 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
339 } else if (is_latin1) {
340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
341 } else {
342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
343 }
344 }
345
346 #ifdef ASSERT
347 // This check is too strict when the input string is not a valid UTF8.
348 // For example, it may be created with arbitrary content via jni_NewStringUTF.
349 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) {
350 ResourceMark rm;
351 const char* expected = utf8_str;
352 char* actual = as_utf8_string(h_obj());
353 if (strcmp(expected, actual) != 0) {
354 fatal("String conversion failure: %s --> %s", expected, actual);
355 }
356 }
357 #endif
358
359 return h_obj;
360 }
361
362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
363 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
364 return h_obj();
365 }
366
367 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
368 const char* utf8_str = (char*)symbol->bytes();
369 int utf8_len = symbol->utf8_length();
370
371 bool has_multibyte, is_latin1;
372 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
373 if (!CompactStrings) {
374 has_multibyte = true;
375 is_latin1 = false;
376 }
377
378 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
379 if (length > 0) {
380 if (!has_multibyte) {
381 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
382 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
383 } else if (is_latin1) {
384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
385 } else {
386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
387 }
388 }
389
390 #ifdef ASSERT
391 {
392 ResourceMark rm;
393 const char* expected = symbol->as_utf8();
394 char* actual = as_utf8_string(h_obj());
395 if (strncmp(expected, actual, utf8_len) != 0) {
396 fatal("Symbol conversion failure: %s --> %s", expected, actual);
397 }
398 }
399 #endif
400
401 return h_obj;
402 }
403
404 // Converts a C string to a Java String based on current encoding
405 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
406 assert(str != nullptr, "bad arguments");
407
408 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
409 static to_java_string_fn_t _to_java_string_fn = nullptr;
410
411 if (_to_java_string_fn == nullptr) {
412 void *lib_handle = os::native_java_library();
413 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
414 #if defined(_WIN32) && !defined(_WIN64)
415 if (_to_java_string_fn == nullptr) {
416 // On 32 bit Windows, also try __stdcall decorated name
417 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
418 }
419 #endif
420 if (_to_java_string_fn == nullptr) {
421 fatal("JNU_NewStringPlatform missing");
422 }
423 }
424
425 jstring js = nullptr;
426 {
427 JavaThread* thread = THREAD;
428 HandleMark hm(thread);
429 ThreadToNativeFromVM ttn(thread);
430 js = (_to_java_string_fn)(thread->jni_environment(), str);
431 }
432
433 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
434 JNIHandles::destroy_local(js); // destroy local JNIHandle.
435 return native_platform_string;
436 }
437
438 // Converts a Java String to a native C string that can be used for
439 // native OS calls.
440 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
441 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
442 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
443
444 if (_to_platform_string_fn == nullptr) {
445 void *lib_handle = os::native_java_library();
446 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
447 if (_to_platform_string_fn == nullptr) {
448 fatal("GetStringPlatformChars missing");
449 }
450 }
451
452 char *native_platform_string;
453 jstring js;
454 { JavaThread* thread = THREAD;
455 js = (jstring) JNIHandles::make_local(thread, java_string());
456 HandleMark hm(thread);
457 ThreadToNativeFromVM ttn(thread);
458 JNIEnv *env = thread->jni_environment();
459 bool is_copy;
460 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
461 assert(is_copy == JNI_TRUE, "is_copy value changed");
462 }
463
464 // Uses a store barrier and therefore needs to be in vm state
465 JNIHandles::destroy_local(js);
466
467 return native_platform_string;
468 }
469
470 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
471 ResourceMark rm(THREAD);
472 return create_from_str(java_name->as_klass_external_name(), THREAD);
473 }
474
475 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
476 jchar* result = as_unicode_string_or_null(java_string, length);
477 if (result == nullptr) {
478 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
479 }
480 return result;
481 }
482
483 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
484 typeArrayOop value = java_lang_String::value(java_string);
485 length = java_lang_String::length(java_string, value);
486 bool is_latin1 = java_lang_String::is_latin1(java_string);
487
488 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
489 if (result != nullptr) {
490 if (!is_latin1) {
491 for (int index = 0; index < length; index++) {
492 result[index] = value->char_at(index);
493 }
494 } else {
495 for (int index = 0; index < length; index++) {
496 result[index] = ((jchar) value->byte_at(index)) & 0xff;
497 }
498 }
499 }
500 return result;
501 }
502
503 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
504 // The hash and hashIsZero fields are subject to a benign data race,
505 // making it crucial to ensure that any observable result of the
506 // calculation in this method stays correct under any possible read of
507 // these fields. Necessary restrictions to allow this to be correct
508 // without explicit memory fences or similar concurrency primitives is
509 // that we can ever only write to one of these two fields for a given
510 // String instance, and that the computation is idempotent and derived
511 // from immutable state
512 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
513 if (java_lang_String::hash_is_set(java_string)) {
514 return java_string->int_field(_hash_offset);
515 }
516
517 typeArrayOop value = java_lang_String::value(java_string);
518 int length = java_lang_String::length(java_string, value);
519 bool is_latin1 = java_lang_String::is_latin1(java_string);
520
521 unsigned int hash = 0;
522 if (length > 0) {
523 if (is_latin1) {
524 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
525 } else {
526 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
527 }
528 }
529
530 if (update) {
531 if (hash != 0) {
532 java_string->int_field_put(_hash_offset, hash);
533 } else {
534 java_string->bool_field_put(_hashIsZero_offset, true);
535 }
536 }
537 return hash;
538 }
539
540 unsigned int java_lang_String::hash_code(oop java_string) {
541 return hash_code_impl(java_string, /*update=*/true);
542 }
543
544 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
545 return hash_code_impl(java_string, /*update=*/false);
546 }
547
548
549 char* java_lang_String::as_quoted_ascii(oop java_string) {
550 typeArrayOop value = java_lang_String::value(java_string);
551 int length = java_lang_String::length(java_string, value);
552 bool is_latin1 = java_lang_String::is_latin1(java_string);
553
554 if (length == 0) return nullptr;
555
556 char* result;
557 int result_length;
558 if (!is_latin1) {
559 jchar* base = value->char_at_addr(0);
560 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
561 result = NEW_RESOURCE_ARRAY(char, result_length);
562 UNICODE::as_quoted_ascii(base, length, result, result_length);
563 } else {
564 jbyte* base = value->byte_at_addr(0);
565 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
566 result = NEW_RESOURCE_ARRAY(char, result_length);
567 UNICODE::as_quoted_ascii(base, length, result, result_length);
568 }
569 assert(result_length >= length + 1, "must not be shorter");
570 assert(result_length == (int)strlen(result) + 1, "must match");
571 return result;
572 }
573
574 Symbol* java_lang_String::as_symbol(oop java_string) {
575 typeArrayOop value = java_lang_String::value(java_string);
576 int length = java_lang_String::length(java_string, value);
577 bool is_latin1 = java_lang_String::is_latin1(java_string);
578 if (!is_latin1) {
579 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
580 Symbol* sym = SymbolTable::new_symbol(base, length);
581 return sym;
582 } else {
583 ResourceMark rm;
584 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
585 const char* base = UNICODE::as_utf8(position, length);
586 Symbol* sym = SymbolTable::new_symbol(base, length);
587 return sym;
588 }
589 }
590
591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
592 typeArrayOop value = java_lang_String::value(java_string);
593 int length = java_lang_String::length(java_string, value);
594 bool is_latin1 = java_lang_String::is_latin1(java_string);
595 if (!is_latin1) {
596 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
597 return SymbolTable::probe_unicode(base, length);
598 } else {
599 ResourceMark rm;
600 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
601 const char* base = UNICODE::as_utf8(position, length);
602 return SymbolTable::probe(base, length);
603 }
604 }
605
606 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
607 assert(value_equals(value, java_lang_String::value(java_string)),
608 "value must be same as java_lang_String::value(java_string)");
609 int length = java_lang_String::length(java_string, value);
610 if (length == 0) {
611 return 0;
612 }
613 if (!java_lang_String::is_latin1(java_string)) {
614 return UNICODE::utf8_length(value->char_at_addr(0), length);
615 } else {
616 return UNICODE::utf8_length(value->byte_at_addr(0), length);
617 }
618 }
619
620 int java_lang_String::utf8_length(oop java_string) {
621 typeArrayOop value = java_lang_String::value(java_string);
622 return utf8_length(java_string, value);
623 }
624
625 char* java_lang_String::as_utf8_string(oop java_string) {
626 int length;
627 return as_utf8_string(java_string, length);
628 }
629
630 char* java_lang_String::as_utf8_string(oop java_string, int& length) {
631 typeArrayOop value = java_lang_String::value(java_string);
632 length = java_lang_String::length(java_string, value);
633 bool is_latin1 = java_lang_String::is_latin1(java_string);
634 if (!is_latin1) {
635 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
636 return UNICODE::as_utf8(position, length);
637 } else {
638 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
639 return UNICODE::as_utf8(position, length);
640 }
641 }
642
643 // Uses a provided buffer if it's sufficiently large, otherwise allocates
644 // a resource array to fit
645 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) {
646 typeArrayOop value = java_lang_String::value(java_string);
647 int len = java_lang_String::length(java_string, value);
648 bool is_latin1 = java_lang_String::is_latin1(java_string);
649 if (!is_latin1) {
650 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
651 utf8_len = UNICODE::utf8_length(position, len);
652 if (utf8_len >= buflen) {
653 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
654 }
655 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
656 } else {
657 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
658 utf8_len = UNICODE::utf8_length(position, len);
659 if (utf8_len >= buflen) {
660 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
661 }
662 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
663 }
664 }
665
666 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
667 assert(value_equals(value, java_lang_String::value(java_string)),
668 "value must be same as java_lang_String::value(java_string)");
669 int length = java_lang_String::length(java_string, value);
670 bool is_latin1 = java_lang_String::is_latin1(java_string);
671 if (!is_latin1) {
672 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
673 return UNICODE::as_utf8(position, length, buf, buflen);
674 } else {
675 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
676 return UNICODE::as_utf8(position, length, buf, buflen);
677 }
678 }
679
680 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
681 typeArrayOop value = java_lang_String::value(java_string);
682 return as_utf8_string(java_string, value, buf, buflen);
683 }
684
685 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
686 typeArrayOop value = java_lang_String::value(java_string);
687 bool is_latin1 = java_lang_String::is_latin1(java_string);
688 assert(start + len <= java_lang_String::length(java_string), "just checking");
689 if (!is_latin1) {
690 jchar* position = value->char_at_addr(start);
691 return UNICODE::as_utf8(position, len);
692 } else {
693 jbyte* position = value->byte_at_addr(start);
694 return UNICODE::as_utf8(position, len);
695 }
696 }
697
698 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
699 assert(value_equals(value, java_lang_String::value(java_string)),
700 "value must be same as java_lang_String::value(java_string)");
701 assert(start + len <= java_lang_String::length(java_string), "just checking");
702 bool is_latin1 = java_lang_String::is_latin1(java_string);
703 if (!is_latin1) {
704 jchar* position = value->char_at_addr(start);
705 return UNICODE::as_utf8(position, len, buf, buflen);
706 } else {
707 jbyte* position = value->byte_at_addr(start);
708 return UNICODE::as_utf8(position, len, buf, buflen);
709 }
710 }
711
712 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
713 assert(java_string->klass() == vmClasses::String_klass(),
714 "must be java_string");
715 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
716 int length = java_lang_String::length(java_string, value);
717 if (length != len) {
718 return false;
719 }
720 bool is_latin1 = java_lang_String::is_latin1(java_string);
721 if (!is_latin1) {
722 for (int i = 0; i < len; i++) {
723 if (value->char_at(i) != chars[i]) {
724 return false;
725 }
726 }
727 } else {
728 for (int i = 0; i < len; i++) {
729 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
730 return false;
731 }
732 }
733 }
734 return true;
735 }
736
737 bool java_lang_String::equals(oop str1, oop str2) {
738 assert(str1->klass() == vmClasses::String_klass(),
739 "must be java String");
740 assert(str2->klass() == vmClasses::String_klass(),
741 "must be java String");
742 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
743 bool is_latin1 = java_lang_String::is_latin1(str1);
744 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
745 bool is_latin2 = java_lang_String::is_latin1(str2);
746
747 if (is_latin1 != is_latin2) {
748 // Strings with different coders are never equal.
749 return false;
750 }
751 return value_equals(value1, value2);
752 }
753
754 // Print the given string to the given outputStream, limiting the output to
755 // at most max_length of the string's characters. If the length exceeds the
756 // limit we print an abridged version of the string with the "middle" elided
757 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
758 // it is treated as max_length-1.
759 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
760 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
761 // We need at least two characters to print A ... B
762 assert(max_length > 1, "invalid max_length: %d", max_length);
763
764 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
765
766 if (value == nullptr) {
767 // This can happen if, e.g., printing a String
768 // object before its initializer has been called
769 st->print("nullptr");
770 return;
771 }
772
773 int length = java_lang_String::length(java_string, value);
774 bool is_latin1 = java_lang_String::is_latin1(java_string);
775
776 bool abridge = length > max_length;
777
778 st->print("\"");
779 for (int index = 0; index < length; index++) {
780 // If we need to abridge and we've printed half the allowed characters
781 // then jump to the tail of the string.
782 if (abridge && index >= max_length / 2) {
783 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
784 index = length - (max_length / 2);
785 abridge = false; // only do this once
786 }
787 jchar c = (!is_latin1) ? value->char_at(index) :
788 ((jchar) value->byte_at(index)) & 0xff;
789 if (c < ' ') {
790 st->print("\\x%02X", c); // print control characters e.g. \x0A
791 } else {
792 st->print("%c", c);
793 }
794 }
795 st->print("\"");
796
797 if (length > max_length) {
798 st->print(" (abridged) ");
799 }
800 }
801
802 // java_lang_Class
803
804 int java_lang_Class::_klass_offset;
805 int java_lang_Class::_array_klass_offset;
806 int java_lang_Class::_oop_size_offset;
807 int java_lang_Class::_static_oop_field_count_offset;
808 int java_lang_Class::_class_loader_offset;
809 int java_lang_Class::_module_offset;
810 int java_lang_Class::_protection_domain_offset;
811 int java_lang_Class::_component_mirror_offset;
812 int java_lang_Class::_init_lock_offset;
813 int java_lang_Class::_signers_offset;
814 int java_lang_Class::_name_offset;
815 int java_lang_Class::_source_file_offset;
816 int java_lang_Class::_classData_offset;
817 int java_lang_Class::_classRedefinedCount_offset;
818
819 bool java_lang_Class::_offsets_computed = false;
820 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
821 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
822
823 #ifdef ASSERT
824 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
825 assert(fd->has_initial_value(), "caller should have checked this");
826 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
827 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
828 }
829 #endif
830
831 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
832 DEBUG_ONLY(assert_valid_static_string_field(fd);)
833 oop string = fd->string_initial_value(CHECK);
834 mirror()->obj_field_put(fd->offset(), string);
835 }
836
837 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
838 assert(fd->has_initial_value(), "caller should have checked this");
839 BasicType t = fd->field_type();
840 switch (t) {
841 case T_BYTE:
842 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
843 break;
844 case T_BOOLEAN:
845 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
846 break;
847 case T_CHAR:
848 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
849 break;
850 case T_SHORT:
851 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
852 break;
853 case T_INT:
854 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
855 break;
856 case T_FLOAT:
857 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
858 break;
859 case T_DOUBLE:
860 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
861 break;
862 case T_LONG:
863 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
864 break;
865 default:
866 // Illegal ConstantValue attribute in class file should have been
867 // caught during classfile parsing.
868 ShouldNotReachHere();
869 }
870 }
871
872 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
873 assert(mirror.not_null() && fd->is_static(), "just checking");
874 if (fd->has_initial_value()) {
875 if (fd->field_type() != T_OBJECT) {
876 initialize_static_primitive_field(fd, mirror);
877 } else {
878 initialize_static_string_field(fd, mirror, CHECK);
879 }
880 }
881 }
882
883 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
884 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
885
886 // If the offset was read from the shared archive, it was fixed up already
887 if (!k->is_shared()) {
888 if (k->is_instance_klass()) {
889 // During bootstrap, java.lang.Class wasn't loaded so static field
890 // offsets were computed without the size added it. Go back and
891 // update all the static field offsets to included the size.
892
893 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
894 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
895 // static fields offsets are updated in this array before reencoding everything into
896 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
897
898 int java_fields;
899 int injected_fields;
900 InstanceKlass* ik = InstanceKlass::cast(k);
901 GrowableArray<FieldInfo>* fields =
902 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
903 &java_fields, &injected_fields);
904 for (int i = 0; i < fields->length(); i++) {
905 FieldInfo* fi = fields->adr_at(i);
906 if (fi->access_flags().is_static()) {
907 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
908 }
909 }
910 Array<u1>* old_stream = ik->fieldinfo_stream();
911 assert(fields->length() == (java_fields + injected_fields), "Must be");
912 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
913 ik->set_fieldinfo_stream(new_fis);
914 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
915 }
916 }
917
918 if (k->is_shared() && k->has_archived_mirror_index()) {
919 if (ArchiveHeapLoader::is_in_use()) {
920 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
921 assert(present, "Missing archived mirror for %s", k->external_name());
922 return;
923 } else {
924 k->clear_java_mirror_handle();
925 k->clear_archived_mirror_index();
926 }
927 }
928 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
929 }
930
931 void java_lang_Class::initialize_mirror_fields(Klass* k,
932 Handle mirror,
933 Handle protection_domain,
934 Handle classData,
935 TRAPS) {
936 // Allocate a simple java object for a lock.
937 // This needs to be a java object because during class initialization
938 // it can be held across a java call.
939 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
940 set_init_lock(mirror(), r);
941
942 // Set protection domain also
943 set_protection_domain(mirror(), protection_domain());
944
945 // Initialize static fields
946 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
947
948 // Set classData
949 set_class_data(mirror(), classData());
950 }
951
952 // Set the java.lang.Module module field in the java_lang_Class mirror
953 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
954 if (module.is_null()) {
955 // During startup, the module may be null only if java.base has not been defined yet.
956 // Put the class on the fixup_module_list to patch later when the java.lang.Module
957 // for java.base is known. But note that since we captured the null module another
958 // thread may have completed that initialization.
959
960 bool javabase_was_defined = false;
961 {
962 MutexLocker m1(current, Module_lock);
963 // Keep list of classes needing java.base module fixup
964 if (!ModuleEntryTable::javabase_defined()) {
965 assert(k->java_mirror() != nullptr, "Class's mirror is null");
966 k->class_loader_data()->inc_keep_alive();
967 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
968 fixup_module_field_list()->push(k);
969 } else {
970 javabase_was_defined = true;
971 }
972 }
973
974 // If java.base was already defined then patch this particular class with java.base.
975 if (javabase_was_defined) {
976 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
977 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
978 "Setting class module field, " JAVA_BASE_NAME " should be defined");
979 Handle javabase_handle(current, javabase_entry->module());
980 set_module(mirror(), javabase_handle());
981 }
982 } else {
983 assert(Universe::is_module_initialized() ||
984 (ModuleEntryTable::javabase_defined() &&
985 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
986 "Incorrect java.lang.Module specification while creating mirror");
987 set_module(mirror(), module());
988 }
989 }
990
991 // Statically allocate fixup lists because they always get created.
992 void java_lang_Class::allocate_fixup_lists() {
993 GrowableArray<Klass*>* mirror_list =
994 new (mtClass) GrowableArray<Klass*>(40, mtClass);
995 set_fixup_mirror_list(mirror_list);
996
997 GrowableArray<Klass*>* module_list =
998 new (mtModule) GrowableArray<Klass*>(500, mtModule);
999 set_fixup_module_field_list(module_list);
1000 }
1001
1002 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1003 Handle& mirror, Handle& comp_mirror, TRAPS) {
1004 // Allocate mirror (java.lang.Class instance)
1005 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1006 mirror = Handle(THREAD, mirror_oop);
1007
1008 // Setup indirection from mirror->klass
1009 set_klass(mirror(), k);
1010
1011 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1012 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1013
1014 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1015
1016 // It might also have a component mirror. This mirror must already exist.
1017 if (k->is_array_klass()) {
1018 if (k->is_typeArray_klass()) {
1019 BasicType type = TypeArrayKlass::cast(k)->element_type();
1020 if (is_scratch) {
1021 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1022 } else {
1023 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1024 }
1025 } else {
1026 assert(k->is_objArray_klass(), "Must be");
1027 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1028 assert(element_klass != nullptr, "Must have an element klass");
1029 if (is_scratch) {
1030 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1031 } else {
1032 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1033 }
1034 }
1035 assert(comp_mirror() != nullptr, "must have a mirror");
1036
1037 // Two-way link between the array klass and its component mirror:
1038 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1039 set_component_mirror(mirror(), comp_mirror());
1040 // See below for ordering dependencies between field array_klass in component mirror
1041 // and java_mirror in this klass.
1042 } else {
1043 assert(k->is_instance_klass(), "Must be");
1044
1045 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1046 if (HAS_PENDING_EXCEPTION) {
1047 // If any of the fields throws an exception like OOM remove the klass field
1048 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1049 // This mirror looks like a primitive type, which logically it is because it
1050 // it represents no class.
1051 set_klass(mirror(), nullptr);
1052 return;
1053 }
1054 }
1055 }
1056
1057 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1058 Handle module, Handle protection_domain,
1059 Handle classData, TRAPS) {
1060 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1061 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1062
1063 // Use this moment of initialization to cache modifier_flags also,
1064 // to support Class.getModifiers(). Instance classes recalculate
1065 // the cached flags after the class file is parsed, but before the
1066 // class is put into the system dictionary.
1067 int computed_modifiers = k->compute_modifier_flags();
1068 k->set_modifier_flags(computed_modifiers);
1069 // Class_klass has to be loaded because it is used to allocate
1070 // the mirror.
1071 if (vmClasses::Class_klass_loaded()) {
1072 Handle mirror;
1073 Handle comp_mirror;
1074
1075 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1076
1077 // set the classLoader field in the java_lang_Class instance
1078 assert(class_loader() == k->class_loader(), "should be same");
1079 set_class_loader(mirror(), class_loader());
1080
1081 // Setup indirection from klass->mirror
1082 // after any exceptions can happen during allocations.
1083 k->set_java_mirror(mirror);
1084
1085 // Set the module field in the java_lang_Class instance. This must be done
1086 // after the mirror is set.
1087 set_mirror_module_field(THREAD, k, mirror, module);
1088
1089 if (comp_mirror() != nullptr) {
1090 // Set after k->java_mirror() is published, because compiled code running
1091 // concurrently doesn't expect a k to have a null java_mirror.
1092 release_set_array_klass(comp_mirror(), k);
1093 }
1094 if (CDSConfig::is_dumping_heap()) {
1095 create_scratch_mirror(k, CHECK);
1096 }
1097 } else {
1098 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1099 fixup_mirror_list()->push(k);
1100 }
1101 }
1102
1103 #if INCLUDE_CDS_JAVA_HEAP
1104 // The "scratch mirror" stores the states of the mirror object that can be
1105 // decided at dump time (such as the initial values of the static fields, the
1106 // component mirror, etc). At runtime, more information is added to it by
1107 // java_lang_Class::restore_archived_mirror().
1108 //
1109 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1110 // produces the same result as /*runtime*/create_mirror().
1111 //
1112 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1113 // latter may contain dumptime-specific information that cannot be archived
1114 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1115 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1116 if (k->class_loader() != nullptr &&
1117 k->class_loader() != SystemDictionary::java_platform_loader() &&
1118 k->class_loader() != SystemDictionary::java_system_loader()) {
1119 // We only archive the mirrors of classes loaded by the built-in loaders
1120 return;
1121 }
1122
1123 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1124 Handle mirror;
1125 Handle comp_mirror;
1126 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1127
1128 if (comp_mirror() != nullptr) {
1129 release_set_array_klass(comp_mirror(), k);
1130 }
1131
1132 HeapShared::set_scratch_java_mirror(k, mirror());
1133 }
1134
1135 // Returns true if the mirror is updated, false if no archived mirror
1136 // data is present. After the archived mirror object is restored, the
1137 // shared klass' _has_raw_archived_mirror flag is cleared.
1138 bool java_lang_Class::restore_archived_mirror(Klass *k,
1139 Handle class_loader, Handle module,
1140 Handle protection_domain, TRAPS) {
1141 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1142 // see more details in vmClasses::resolve_all().
1143 if (!vmClasses::Class_klass_loaded()) {
1144 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1145 fixup_mirror_list()->push(k);
1146 return true;
1147 }
1148
1149 oop m = k->archived_java_mirror();
1150 assert(m != nullptr, "must have stored non-null archived mirror");
1151
1152 // Sanity: clear it now to prevent re-initialization if any of the following fails
1153 k->clear_archived_mirror_index();
1154
1155 // mirror is archived, restore
1156 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1157 assert(as_Klass(m) == k, "must be");
1158 Handle mirror(THREAD, m);
1159
1160 if (!k->is_array_klass()) {
1161 // - local static final fields with initial values were initialized at dump time
1162
1163 // create the init_lock
1164 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1165 set_init_lock(mirror(), r);
1166
1167 if (protection_domain.not_null()) {
1168 set_protection_domain(mirror(), protection_domain());
1169 }
1170 }
1171
1172 assert(class_loader() == k->class_loader(), "should be same");
1173 if (class_loader.not_null()) {
1174 set_class_loader(mirror(), class_loader());
1175 }
1176
1177 k->set_java_mirror(mirror);
1178
1179 set_mirror_module_field(THREAD, k, mirror, module);
1180
1181 if (log_is_enabled(Trace, cds, heap, mirror)) {
1182 ResourceMark rm(THREAD);
1183 log_trace(cds, heap, mirror)(
1184 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1185 }
1186
1187 return true;
1188 }
1189 #endif // INCLUDE_CDS_JAVA_HEAP
1190
1191 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1192 assert(_module_offset != 0, "must have been computed already");
1193 set_module(k->java_mirror(), module());
1194 }
1195
1196 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1197 assert(_oop_size_offset != 0, "must be set");
1198 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1199 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1200 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1201 }
1202
1203 int java_lang_Class::static_oop_field_count(oop java_class) {
1204 assert(_static_oop_field_count_offset != 0, "must be set");
1205 return java_class->int_field(_static_oop_field_count_offset);
1206 }
1207
1208 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1209 assert(_static_oop_field_count_offset != 0, "must be set");
1210 java_class->int_field_put(_static_oop_field_count_offset, size);
1211 }
1212
1213 oop java_lang_Class::protection_domain(oop java_class) {
1214 assert(_protection_domain_offset != 0, "must be set");
1215 return java_class->obj_field(_protection_domain_offset);
1216 }
1217 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1218 assert(_protection_domain_offset != 0, "must be set");
1219 java_class->obj_field_put(_protection_domain_offset, pd);
1220 }
1221
1222 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1223 assert(_component_mirror_offset != 0, "must be set");
1224 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1225 }
1226 oop java_lang_Class::component_mirror(oop java_class) {
1227 assert(_component_mirror_offset != 0, "must be set");
1228 return java_class->obj_field(_component_mirror_offset);
1229 }
1230
1231 oop java_lang_Class::init_lock(oop java_class) {
1232 assert(_init_lock_offset != 0, "must be set");
1233 return java_class->obj_field(_init_lock_offset);
1234 }
1235 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1236 assert(_init_lock_offset != 0, "must be set");
1237 java_class->obj_field_put(_init_lock_offset, init_lock);
1238 }
1239
1240 objArrayOop java_lang_Class::signers(oop java_class) {
1241 assert(_signers_offset != 0, "must be set");
1242 return (objArrayOop)java_class->obj_field(_signers_offset);
1243 }
1244
1245 oop java_lang_Class::class_data(oop java_class) {
1246 assert(_classData_offset != 0, "must be set");
1247 return java_class->obj_field(_classData_offset);
1248 }
1249 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1250 assert(_classData_offset != 0, "must be set");
1251 java_class->obj_field_put(_classData_offset, class_data);
1252 }
1253
1254 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1255 assert(_class_loader_offset != 0, "offsets should have been initialized");
1256 java_class->obj_field_put(_class_loader_offset, loader);
1257 }
1258
1259 oop java_lang_Class::class_loader(oop java_class) {
1260 assert(_class_loader_offset != 0, "must be set");
1261 return java_class->obj_field(_class_loader_offset);
1262 }
1263
1264 oop java_lang_Class::module(oop java_class) {
1265 assert(_module_offset != 0, "must be set");
1266 return java_class->obj_field(_module_offset);
1267 }
1268
1269 void java_lang_Class::set_module(oop java_class, oop module) {
1270 assert(_module_offset != 0, "must be set");
1271 java_class->obj_field_put(_module_offset, module);
1272 }
1273
1274 oop java_lang_Class::name(Handle java_class, TRAPS) {
1275 assert(_name_offset != 0, "must be set");
1276 oop o = java_class->obj_field(_name_offset);
1277 if (o == nullptr) {
1278 o = StringTable::intern(as_external_name(java_class()), THREAD);
1279 java_class->obj_field_put(_name_offset, o);
1280 }
1281 return o;
1282 }
1283
1284 oop java_lang_Class::source_file(oop java_class) {
1285 assert(_source_file_offset != 0, "must be set");
1286 return java_class->obj_field(_source_file_offset);
1287 }
1288
1289 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1290 assert(_source_file_offset != 0, "must be set");
1291 java_class->obj_field_put(_source_file_offset, source_file);
1292 }
1293
1294 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1295 // This should be improved by adding a field at the Java level or by
1296 // introducing a new VM klass (see comment in ClassFileParser)
1297 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1298 if (type != T_VOID) {
1299 Klass* aklass = Universe::typeArrayKlass(type);
1300 assert(aklass != nullptr, "correct bootstrap");
1301 release_set_array_klass(java_class, aklass);
1302 }
1303 #ifdef ASSERT
1304 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1305 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1306 #endif
1307 return java_class;
1308 }
1309
1310 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1311 assert(is_instance(java_class), "must be a Class object");
1312 java_class->metadata_field_put(_klass_offset, klass);
1313 }
1314
1315
1316 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1317 assert(is_instance(java_class), "must be a Class object");
1318 Symbol* name = nullptr;
1319 bool is_instance = false;
1320 if (is_primitive(java_class)) {
1321 name = vmSymbols::type_signature(primitive_type(java_class));
1322 } else {
1323 Klass* k = as_Klass(java_class);
1324 is_instance = k->is_instance_klass();
1325 name = k->name();
1326 }
1327 if (name == nullptr) {
1328 st->print("<null>");
1329 return;
1330 }
1331 if (is_instance) st->print("L");
1332 st->write((char*) name->base(), (int) name->utf8_length());
1333 if (is_instance) st->print(";");
1334 }
1335
1336 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1337 assert(is_instance(java_class), "must be a Class object");
1338 Symbol* name;
1339 if (is_primitive(java_class)) {
1340 name = vmSymbols::type_signature(primitive_type(java_class));
1341 // Because this can create a new symbol, the caller has to decrement
1342 // the refcount, so make adjustment here and below for symbols returned
1343 // that are not created or incremented due to a successful lookup.
1344 name->increment_refcount();
1345 } else {
1346 Klass* k = as_Klass(java_class);
1347 if (!k->is_instance_klass()) {
1348 name = k->name();
1349 name->increment_refcount();
1350 } else {
1351 ResourceMark rm;
1352 const char* sigstr = k->signature_name();
1353 int siglen = (int) strlen(sigstr);
1354 if (!intern_if_not_found) {
1355 name = SymbolTable::probe(sigstr, siglen);
1356 } else {
1357 name = SymbolTable::new_symbol(sigstr, siglen);
1358 }
1359 }
1360 }
1361 return name;
1362 }
1363
1364 // Returns the Java name for this Java mirror (Resource allocated)
1365 // See Klass::external_name().
1366 // For primitive type Java mirrors, its type name is returned.
1367 const char* java_lang_Class::as_external_name(oop java_class) {
1368 assert(is_instance(java_class), "must be a Class object");
1369 const char* name = nullptr;
1370 if (is_primitive(java_class)) {
1371 name = type2name(primitive_type(java_class));
1372 } else {
1373 name = as_Klass(java_class)->external_name();
1374 }
1375 if (name == nullptr) {
1376 name = "<null>";
1377 }
1378 return name;
1379 }
1380
1381 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1382 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1383 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1384 return k;
1385 }
1386
1387
1388 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1389 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1390 java_class->release_metadata_field_put(_array_klass_offset, klass);
1391 }
1392
1393
1394 BasicType java_lang_Class::primitive_type(oop java_class) {
1395 assert(is_primitive(java_class), "just checking");
1396 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1397 BasicType type = T_VOID;
1398 if (ak != nullptr) {
1399 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1400 type = ArrayKlass::cast(ak)->element_type();
1401 } else {
1402 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1403 }
1404 #ifdef ASSERT
1405 if (CDSConfig::is_dumping_heap()) {
1406 oop mirror = Universe::java_mirror(type);
1407 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1408 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1409 } else {
1410 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1411 }
1412 #endif
1413 return type;
1414 }
1415
1416 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1417 assert(is_instance(java_class), "must be a Class object");
1418 if (is_primitive(java_class)) {
1419 if (reference_klass != nullptr)
1420 (*reference_klass) = nullptr;
1421 return primitive_type(java_class);
1422 } else {
1423 if (reference_klass != nullptr)
1424 (*reference_klass) = as_Klass(java_class);
1425 return T_OBJECT;
1426 }
1427 }
1428
1429
1430 oop java_lang_Class::primitive_mirror(BasicType t) {
1431 oop mirror = Universe::java_mirror(t);
1432 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1433 assert(is_primitive(mirror), "must be primitive");
1434 return mirror;
1435 }
1436
1437 #define CLASS_FIELDS_DO(macro) \
1438 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1439 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1440 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1441 macro(_module_offset, k, "module", module_signature, false); \
1442 macro(_name_offset, k, "name", string_signature, false); \
1443 macro(_classData_offset, k, "classData", object_signature, false); \
1444 macro(_signers_offset, k, "signers", object_array_signature, false);
1445
1446 void java_lang_Class::compute_offsets() {
1447 if (_offsets_computed) {
1448 return;
1449 }
1450
1451 _offsets_computed = true;
1452
1453 InstanceKlass* k = vmClasses::Class_klass();
1454 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1455
1456 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1457 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1458 // GC treats them the same.
1459 _init_lock_offset = _component_mirror_offset;
1460
1461 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1462 }
1463
1464 #if INCLUDE_CDS
1465 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1466 f->do_bool(&_offsets_computed);
1467 f->do_u4((u4*)&_init_lock_offset);
1468
1469 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1470
1471 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1472 }
1473 #endif
1474
1475 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1476 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1477 return the_class_mirror->int_field(_classRedefinedCount_offset);
1478 }
1479
1480 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1481 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1482 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1483 }
1484
1485
1486 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1487 // platform thread structure, and a eetop offset which was used for thread
1488 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1489 // merged, so in the HotSpot VM we just use the eetop field for the thread
1490 // instead of the privateInfo_offset.
1491 //
1492 // Note: The stackSize field is only present starting in 1.4.
1493
1494 int java_lang_Thread_FieldHolder::_group_offset;
1495 int java_lang_Thread_FieldHolder::_priority_offset;
1496 int java_lang_Thread_FieldHolder::_stackSize_offset;
1497 int java_lang_Thread_FieldHolder::_daemon_offset;
1498 int java_lang_Thread_FieldHolder::_thread_status_offset;
1499
1500 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1501 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1502 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1503 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1504 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1505 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1506
1507 void java_lang_Thread_FieldHolder::compute_offsets() {
1508 assert(_group_offset == 0, "offsets should be initialized only once");
1509
1510 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1511 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1512 }
1513
1514 #if INCLUDE_CDS
1515 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1516 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1517 }
1518 #endif
1519
1520 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1521 return holder->obj_field(_group_offset);
1522 }
1523
1524 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1525 return (ThreadPriority)holder->int_field(_priority_offset);
1526 }
1527
1528 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1529 holder->int_field_put(_priority_offset, priority);
1530 }
1531
1532 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1533 return holder->long_field(_stackSize_offset);
1534 }
1535
1536 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1537 return holder->bool_field(_daemon_offset) != 0;
1538 }
1539
1540 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1541 assert(val, "daemon status is never turned off");
1542 holder->bool_field_put(_daemon_offset, val);
1543 }
1544
1545 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1546 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1547 }
1548
1549 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1550 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1551 }
1552
1553
1554 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1555
1556 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1557 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1558
1559 void java_lang_Thread_Constants::compute_offsets() {
1560 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1561
1562 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1563 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1564 }
1565
1566 #if INCLUDE_CDS
1567 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1568 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1569 }
1570 #endif
1571
1572 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1573 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1574 oop base = k->static_field_base_raw();
1575 return base->obj_field(_static_VTHREAD_GROUP_offset);
1576 }
1577
1578
1579 int java_lang_Thread::_holder_offset;
1580 int java_lang_Thread::_name_offset;
1581 int java_lang_Thread::_contextClassLoader_offset;
1582 int java_lang_Thread::_inheritedAccessControlContext_offset;
1583 int java_lang_Thread::_eetop_offset;
1584 int java_lang_Thread::_jvmti_thread_state_offset;
1585 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1586 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1587 int java_lang_Thread::_interrupted_offset;
1588 int java_lang_Thread::_interruptLock_offset;
1589 int java_lang_Thread::_tid_offset;
1590 int java_lang_Thread::_continuation_offset;
1591 int java_lang_Thread::_park_blocker_offset;
1592 int java_lang_Thread::_scopedValueBindings_offset;
1593 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1594
1595 #define THREAD_FIELDS_DO(macro) \
1596 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1597 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1598 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1599 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1600 macro(_eetop_offset, k, "eetop", long_signature, false); \
1601 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1602 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1603 macro(_tid_offset, k, "tid", long_signature, false); \
1604 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1605 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1606 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1607
1608 void java_lang_Thread::compute_offsets() {
1609 assert(_holder_offset == 0, "offsets should be initialized only once");
1610
1611 InstanceKlass* k = vmClasses::Thread_klass();
1612 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1613 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1614 }
1615
1616 #if INCLUDE_CDS
1617 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1618 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1619 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1620 }
1621 #endif
1622
1623 JavaThread* java_lang_Thread::thread(oop java_thread) {
1624 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1625 }
1626
1627 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1628 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1629 }
1630
1631 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1632 java_thread->address_field_put(_eetop_offset, (address)thread);
1633 }
1634
1635 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1636 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1637 }
1638
1639 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1640 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1641 }
1642
1643 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1644 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1645 }
1646
1647 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1648 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1649 }
1650
1651 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1652 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1653 int val = VTMS_transition_disable_count(java_thread);
1654 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1655 }
1656
1657 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1658 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1659 int val = VTMS_transition_disable_count(java_thread);
1660 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1661 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1662 }
1663
1664 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1665 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1666 }
1667
1668 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1669 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1670 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1671 }
1672
1673 int java_lang_Thread::is_in_VTMS_transition_offset() {
1674 return _jvmti_is_in_VTMS_transition_offset;
1675 }
1676
1677 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1678 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1679 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1680 }
1681
1682 oop java_lang_Thread::holder(oop java_thread) {
1683 // Note: may return null if the thread is still attaching
1684 return java_thread->obj_field(_holder_offset);
1685 }
1686 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1687 return java_thread->obj_field(_interruptLock_offset);
1688 }
1689
1690 bool java_lang_Thread::interrupted(oop java_thread) {
1691 // Make sure the caller can safely access oops.
1692 assert(Thread::current()->is_VM_thread() ||
1693 (JavaThread::current()->thread_state() != _thread_blocked &&
1694 JavaThread::current()->thread_state() != _thread_in_native),
1695 "Unsafe access to oop");
1696 return java_thread->bool_field_volatile(_interrupted_offset);
1697 }
1698
1699 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1700 // Make sure the caller can safely access oops.
1701 assert(Thread::current()->is_VM_thread() ||
1702 (JavaThread::current()->thread_state() != _thread_blocked &&
1703 JavaThread::current()->thread_state() != _thread_in_native),
1704 "Unsafe access to oop");
1705 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1706 }
1707
1708
1709 oop java_lang_Thread::name(oop java_thread) {
1710 return java_thread->obj_field(_name_offset);
1711 }
1712
1713
1714 void java_lang_Thread::set_name(oop java_thread, oop name) {
1715 java_thread->obj_field_put(_name_offset, name);
1716 }
1717
1718 // Convenience macros for setting and getting Thread fields that
1719 // are actually stored in the FieldHolder object of the thread.
1720 // The FieldHolder can be null whilst a thread is attaching via
1721 // JNI, and when the main thread is attaching.
1722
1723 // The default value should be the default/zero initialized value
1724 // of the field as it would be in java.lang.Thread.FieldHolder.
1725 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1726 { \
1727 oop holder = java_lang_Thread::holder(java_thread); \
1728 if (holder != nullptr) \
1729 return java_lang_Thread_FieldHolder::field(holder); \
1730 else \
1731 return default_val; \
1732 }
1733
1734 // We should never be trying to set a field of an attaching thread.
1735 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1736 { \
1737 oop holder = java_lang_Thread::holder(java_thread); \
1738 assert(holder != nullptr, "Thread not fully initialized"); \
1739 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1740 }
1741
1742
1743 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1744 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1745 }
1746
1747
1748 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1749 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1750 }
1751
1752
1753 oop java_lang_Thread::threadGroup(oop java_thread) {
1754 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1755 }
1756
1757
1758 bool java_lang_Thread::is_alive(oop java_thread) {
1759 JavaThread* thr = java_lang_Thread::thread(java_thread);
1760 return (thr != nullptr);
1761 }
1762
1763
1764 bool java_lang_Thread::is_daemon(oop java_thread) {
1765 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1766 }
1767
1768
1769 void java_lang_Thread::set_daemon(oop java_thread) {
1770 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1771 }
1772
1773 oop java_lang_Thread::context_class_loader(oop java_thread) {
1774 return java_thread->obj_field(_contextClassLoader_offset);
1775 }
1776
1777 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1778 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1779 }
1780
1781
1782 jlong java_lang_Thread::stackSize(oop java_thread) {
1783 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1784 }
1785
1786 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1787 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1788 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1789 }
1790
1791 // Read thread status value from threadStatus field in java.lang.Thread java class.
1792 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1793 // Make sure the caller is operating on behalf of the VM or is
1794 // running VM code (state == _thread_in_vm).
1795 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1796 JavaThread::current()->thread_state() == _thread_in_vm,
1797 "Java Thread is not running in vm");
1798 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1799 }
1800
1801 ByteSize java_lang_Thread::thread_id_offset() {
1802 return in_ByteSize(_tid_offset);
1803 }
1804
1805 oop java_lang_Thread::park_blocker(oop java_thread) {
1806 return java_thread->obj_field(_park_blocker_offset);
1807 }
1808
1809 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1810 ThreadsListHandle tlh(JavaThread::current());
1811 JavaThread* thread;
1812 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1813 if (is_virtual) {
1814 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1815 if (carrier_thread == nullptr) {
1816 return nullptr;
1817 }
1818 thread = java_lang_Thread::thread(carrier_thread);
1819 } else {
1820 thread = java_lang_Thread::thread(java_thread);
1821 }
1822 if (thread == nullptr) {
1823 return nullptr;
1824 }
1825
1826 class GetStackTraceClosure : public HandshakeClosure {
1827 public:
1828 const Handle _java_thread;
1829 int _depth;
1830 bool _retry_handshake;
1831 GrowableArray<Method*>* _methods;
1832 GrowableArray<int>* _bcis;
1833
1834 GetStackTraceClosure(Handle java_thread) :
1835 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1836 _methods(nullptr), _bcis(nullptr) {
1837 }
1838 ~GetStackTraceClosure() {
1839 delete _methods;
1840 delete _bcis;
1841 }
1842
1843 bool read_reset_retry() {
1844 bool ret = _retry_handshake;
1845 // If we re-execute the handshake this method need to return false
1846 // when the handshake cannot be performed. (E.g. thread terminating)
1847 _retry_handshake = false;
1848 return ret;
1849 }
1850
1851 void do_thread(Thread* th) {
1852 if (!Thread::current()->is_Java_thread()) {
1853 _retry_handshake = true;
1854 return;
1855 }
1856
1857 JavaThread* thread = JavaThread::cast(th);
1858
1859 if (!thread->has_last_Java_frame()) {
1860 return;
1861 }
1862
1863 bool carrier = false;
1864 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1865 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1866 const ContinuationEntry* ce = thread->vthread_continuation();
1867 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1868 return; // not mounted
1869 }
1870 } else {
1871 carrier = (thread->vthread_continuation() != nullptr);
1872 }
1873
1874 const int max_depth = MaxJavaStackTraceDepth;
1875 const bool skip_hidden = !ShowHiddenFrames;
1876
1877 // Pick minimum length that will cover most cases
1878 int init_length = 64;
1879 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1880 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1881
1882 int total_count = 0;
1883 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1884 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1885 vfst.next()) {
1886
1887 if (skip_hidden && (vfst.method()->is_hidden() ||
1888 vfst.method()->is_continuation_enter_intrinsic())) {
1889 continue;
1890 }
1891
1892 _methods->push(vfst.method());
1893 _bcis->push(vfst.bci());
1894 total_count++;
1895 }
1896
1897 _depth = total_count;
1898 }
1899 };
1900
1901 // Handshake with target
1902 ResourceMark rm(THREAD);
1903 HandleMark hm(THREAD);
1904 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1905 do {
1906 Handshake::execute(&gstc, &tlh, thread);
1907 } while (gstc.read_reset_retry());
1908
1909 // Stop if no stack trace is found.
1910 if (gstc._depth == 0) {
1911 return nullptr;
1912 }
1913
1914 // Convert to StackTraceElement array
1915 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1916 assert(k != nullptr, "must be loaded in 1.4+");
1917 if (k->should_be_initialized()) {
1918 k->initialize(CHECK_NULL);
1919 }
1920 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1921
1922 for (int i = 0; i < gstc._depth; i++) {
1923 methodHandle method(THREAD, gstc._methods->at(i));
1924 oop element = java_lang_StackTraceElement::create(method,
1925 gstc._bcis->at(i),
1926 CHECK_NULL);
1927 trace->obj_at_put(i, element);
1928 }
1929
1930 return trace();
1931 }
1932
1933 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1934 JavaThreadStatus status = get_thread_status(java_thread);
1935 switch (status) {
1936 case JavaThreadStatus::NEW : return "NEW";
1937 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
1938 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
1939 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1940 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1941 case JavaThreadStatus::PARKED : return "WAITING (parking)";
1942 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
1943 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1944 case JavaThreadStatus::TERMINATED : return "TERMINATED";
1945 default : return "UNKNOWN";
1946 };
1947 }
1948 int java_lang_ThreadGroup::_parent_offset;
1949 int java_lang_ThreadGroup::_name_offset;
1950 int java_lang_ThreadGroup::_maxPriority_offset;
1951 int java_lang_ThreadGroup::_daemon_offset;
1952
1953 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1954 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1955 return java_thread_group->obj_field(_parent_offset);
1956 }
1957
1958 // ("name as oop" accessor is not necessary)
1959
1960 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1961 oop name = java_thread_group->obj_field(_name_offset);
1962 // ThreadGroup.name can be null
1963 if (name != nullptr) {
1964 return java_lang_String::as_utf8_string(name);
1965 }
1966 return nullptr;
1967 }
1968
1969 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1970 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1971 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1972 }
1973
1974 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1975 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1976 return java_thread_group->bool_field(_daemon_offset) != 0;
1977 }
1978
1979 #define THREADGROUP_FIELDS_DO(macro) \
1980 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1981 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1982 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1983 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
1984
1985 void java_lang_ThreadGroup::compute_offsets() {
1986 assert(_parent_offset == 0, "offsets should be initialized only once");
1987
1988 InstanceKlass* k = vmClasses::ThreadGroup_klass();
1989 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1990 }
1991
1992 #if INCLUDE_CDS
1993 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1994 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1995 }
1996 #endif
1997
1998
1999 // java_lang_VirtualThread
2000
2001 int java_lang_VirtualThread::static_vthread_scope_offset;
2002 int java_lang_VirtualThread::_carrierThread_offset;
2003 int java_lang_VirtualThread::_continuation_offset;
2004 int java_lang_VirtualThread::_state_offset;
2005 int java_lang_VirtualThread::_next_offset;
2006 int java_lang_VirtualThread::_onWaitingList_offset;
2007 int java_lang_VirtualThread::_notified_offset;
2008 int java_lang_VirtualThread::_recheckInterval_offset;
2009 int java_lang_VirtualThread::_waitTimeout_offset;
2010
2011 #define VTHREAD_FIELDS_DO(macro) \
2012 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2013 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2014 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2015 macro(_state_offset, k, "state", int_signature, false); \
2016 macro(_next_offset, k, "next", vthread_signature, false); \
2017 macro(_onWaitingList_offset, k, "onWaitingList", byte_signature, false); \
2018 macro(_notified_offset, k, "notified", bool_signature, false); \
2019 macro(_recheckInterval_offset, k, "recheckInterval", byte_signature, false); \
2020 macro(_waitTimeout_offset, k, "waitTimeout", long_signature, false);
2021
2022
2023 void java_lang_VirtualThread::compute_offsets() {
2024 InstanceKlass* k = vmClasses::VirtualThread_klass();
2025 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2026 }
2027
2028 bool java_lang_VirtualThread::is_instance(oop obj) {
2029 return obj != nullptr && is_subclass(obj->klass());
2030 }
2031
2032 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2033 oop thread = vthread->obj_field(_carrierThread_offset);
2034 return thread;
2035 }
2036
2037 oop java_lang_VirtualThread::continuation(oop vthread) {
2038 oop cont = vthread->obj_field(_continuation_offset);
2039 return cont;
2040 }
2041
2042 int java_lang_VirtualThread::state(oop vthread) {
2043 return vthread->int_field_acquire(_state_offset);
2044 }
2045
2046 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2047 vthread->release_int_field_put(_state_offset, state);
2048 }
2049
2050 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2051 jint* addr = vthread->field_addr<jint>(_state_offset);
2052 int res = Atomic::cmpxchg(addr, old_state, new_state);
2053 return res;
2054 }
2055
2056 oop java_lang_VirtualThread::next(oop vthread) {
2057 return vthread->obj_field(_next_offset);
2058 }
2059
2060 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2061 vthread->obj_field_put(_next_offset, next_vthread);
2062 }
2063
2064 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2065 uint8_t* addr = vthread->field_addr<uint8_t>(_onWaitingList_offset);
2066 uint8_t value = Atomic::load(addr);
2067 assert(value == 0x00 || value == 0x01, "invariant");
2068 if (value == 0x00) {
2069 value = Atomic::cmpxchg(addr, (uint8_t)0x00, (uint8_t)0x01);
2070 if (value == 0x00) {
2071 for (;;) {
2072 oop head = list_head.resolve();
2073 java_lang_VirtualThread::set_next(vthread, head);
2074 if (list_head.cmpxchg(head, vthread) == head) return true;
2075 }
2076 }
2077 }
2078 return false; // already on waiting list
2079 }
2080
2081 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2082 vthread->bool_field_put_volatile(_notified_offset, value);
2083 }
2084
2085 jbyte java_lang_VirtualThread::recheckInterval(oop vthread) {
2086 return vthread->byte_field(_recheckInterval_offset);
2087 }
2088
2089 void java_lang_VirtualThread::set_recheckInterval(oop vthread, jbyte value) {
2090 vthread->release_byte_field_put(_recheckInterval_offset, value);
2091 }
2092
2093 jlong java_lang_VirtualThread::waitTimeout(oop vthread) {
2094 return vthread->long_field(_waitTimeout_offset);
2095 }
2096
2097 void java_lang_VirtualThread::set_waitTimeout(oop vthread, jlong value) {
2098 vthread->long_field_put(_waitTimeout_offset, value);
2099 }
2100
2101 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2102 JavaThreadStatus status = JavaThreadStatus::NEW;
2103 switch (state & ~SUSPENDED) {
2104 case NEW:
2105 status = JavaThreadStatus::NEW;
2106 break;
2107 case STARTED:
2108 case RUNNING:
2109 case PARKING:
2110 case TIMED_PARKING:
2111 case UNPARKED:
2112 case YIELDING:
2113 case YIELDED:
2114 case BLOCKING:
2115 case UNBLOCKED:
2116 case WAITING:
2117 case TIMED_WAITING:
2118 status = JavaThreadStatus::RUNNABLE;
2119 break;
2120 case PARKED:
2121 case PINNED:
2122 status = JavaThreadStatus::PARKED;
2123 break;
2124 case TIMED_PARKED:
2125 case TIMED_PINNED:
2126 status = JavaThreadStatus::PARKED_TIMED;
2127 break;
2128 case BLOCKED:
2129 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2130 break;
2131 case WAIT:
2132 status = JavaThreadStatus::IN_OBJECT_WAIT;
2133 break;
2134 case TIMED_WAIT:
2135 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2136 break;
2137 case TERMINATED:
2138 status = JavaThreadStatus::TERMINATED;
2139 break;
2140 default:
2141 ShouldNotReachHere();
2142 }
2143 return status;
2144 }
2145
2146 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2147 oop continuation = java_lang_VirtualThread::continuation(vthread);
2148 return jdk_internal_vm_Continuation::is_preempted(continuation);
2149 }
2150
2151 #if INCLUDE_CDS
2152 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2153 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2154 }
2155 #endif
2156
2157 // java_lang_Throwable
2158
2159 int java_lang_Throwable::_backtrace_offset;
2160 int java_lang_Throwable::_detailMessage_offset;
2161 int java_lang_Throwable::_stackTrace_offset;
2162 int java_lang_Throwable::_depth_offset;
2163 int java_lang_Throwable::_cause_offset;
2164 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2165
2166 #define THROWABLE_FIELDS_DO(macro) \
2167 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2168 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2169 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2170 macro(_depth_offset, k, "depth", int_signature, false); \
2171 macro(_cause_offset, k, "cause", throwable_signature, false); \
2172 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2173
2174 void java_lang_Throwable::compute_offsets() {
2175 InstanceKlass* k = vmClasses::Throwable_klass();
2176 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2177 }
2178
2179 #if INCLUDE_CDS
2180 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2181 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2182 }
2183 #endif
2184
2185 oop java_lang_Throwable::unassigned_stacktrace() {
2186 InstanceKlass* ik = vmClasses::Throwable_klass();
2187 oop base = ik->static_field_base_raw();
2188 return base->obj_field(_static_unassigned_stacktrace_offset);
2189 }
2190
2191 oop java_lang_Throwable::backtrace(oop throwable) {
2192 return throwable->obj_field_acquire(_backtrace_offset);
2193 }
2194
2195
2196 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2197 throwable->release_obj_field_put(_backtrace_offset, value);
2198 }
2199
2200 int java_lang_Throwable::depth(oop throwable) {
2201 return throwable->int_field(_depth_offset);
2202 }
2203
2204 void java_lang_Throwable::set_depth(oop throwable, int value) {
2205 throwable->int_field_put(_depth_offset, value);
2206 }
2207
2208 oop java_lang_Throwable::message(oop throwable) {
2209 return throwable->obj_field(_detailMessage_offset);
2210 }
2211
2212 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2213 oop msg = java_lang_Throwable::message(throwable);
2214 const char* msg_utf8 = nullptr;
2215 if (msg != nullptr) {
2216 msg_utf8 = java_lang_String::as_utf8_string(msg);
2217 }
2218 return msg_utf8;
2219 }
2220
2221 oop java_lang_Throwable::cause(oop throwable) {
2222 return throwable->obj_field(_cause_offset);
2223 }
2224
2225 void java_lang_Throwable::set_message(oop throwable, oop value) {
2226 throwable->obj_field_put(_detailMessage_offset, value);
2227 }
2228
2229
2230 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2231 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2232 }
2233
2234 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2235 set_stacktrace(throwable, nullptr);
2236 }
2237
2238
2239 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2240 ResourceMark rm;
2241 Klass* k = throwable->klass();
2242 assert(k != nullptr, "just checking");
2243 st->print("%s", k->external_name());
2244 oop msg = message(throwable);
2245 if (msg != nullptr) {
2246 st->print(": %s", java_lang_String::as_utf8_string(msg));
2247 }
2248 }
2249
2250 // After this many redefines, the stack trace is unreliable.
2251 const int MAX_VERSION = USHRT_MAX;
2252
2253 static inline bool version_matches(Method* method, int version) {
2254 assert(version < MAX_VERSION, "version is too big");
2255 return method != nullptr && (method->constants()->version() == version);
2256 }
2257
2258 // This class provides a simple wrapper over the internal structure of
2259 // exception backtrace to insulate users of the backtrace from needing
2260 // to know what it looks like.
2261 // The code of this class is not GC safe. Allocations can only happen
2262 // in expand().
2263 class BacktraceBuilder: public StackObj {
2264 friend class BacktraceIterator;
2265 private:
2266 Handle _backtrace;
2267 objArrayOop _head;
2268 typeArrayOop _methods;
2269 typeArrayOop _bcis;
2270 objArrayOop _mirrors;
2271 typeArrayOop _names; // Needed to insulate method name against redefinition.
2272 // True if the top frame of the backtrace is omitted because it shall be hidden.
2273 bool _has_hidden_top_frame;
2274 int _index;
2275 NoSafepointVerifier _nsv;
2276
2277 enum {
2278 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2279 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2280 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2281 trace_names_offset = java_lang_Throwable::trace_names_offset,
2282 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2283 trace_next_offset = java_lang_Throwable::trace_next_offset,
2284 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2285 trace_size = java_lang_Throwable::trace_size,
2286 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2287 };
2288
2289 // get info out of chunks
2290 static typeArrayOop get_methods(objArrayHandle chunk) {
2291 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2292 assert(methods != nullptr, "method array should be initialized in backtrace");
2293 return methods;
2294 }
2295 static typeArrayOop get_bcis(objArrayHandle chunk) {
2296 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2297 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2298 return bcis;
2299 }
2300 static objArrayOop get_mirrors(objArrayHandle chunk) {
2301 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2302 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2303 return mirrors;
2304 }
2305 static typeArrayOop get_names(objArrayHandle chunk) {
2306 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2307 assert(names != nullptr, "names array should be initialized in backtrace");
2308 return names;
2309 }
2310 static bool has_hidden_top_frame(objArrayHandle chunk) {
2311 oop hidden = chunk->obj_at(trace_hidden_offset);
2312 return hidden != nullptr;
2313 }
2314
2315 public:
2316
2317 // constructor for new backtrace
2318 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2319 expand(CHECK);
2320 _backtrace = Handle(THREAD, _head);
2321 _index = 0;
2322 }
2323
2324 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2325 _methods = get_methods(backtrace);
2326 _bcis = get_bcis(backtrace);
2327 _mirrors = get_mirrors(backtrace);
2328 _names = get_names(backtrace);
2329 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2330 assert(_methods->length() == _bcis->length() &&
2331 _methods->length() == _mirrors->length() &&
2332 _mirrors->length() == _names->length(),
2333 "method and source information arrays should match");
2334
2335 // head is the preallocated backtrace
2336 _head = backtrace();
2337 _backtrace = Handle(thread, _head);
2338 _index = 0;
2339 }
2340
2341 void expand(TRAPS) {
2342 objArrayHandle old_head(THREAD, _head);
2343 PauseNoSafepointVerifier pnsv(&_nsv);
2344
2345 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2346 objArrayHandle new_head(THREAD, head);
2347
2348 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2349 typeArrayHandle new_methods(THREAD, methods);
2350
2351 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2352 typeArrayHandle new_bcis(THREAD, bcis);
2353
2354 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2355 objArrayHandle new_mirrors(THREAD, mirrors);
2356
2357 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2358 typeArrayHandle new_names(THREAD, names);
2359
2360 if (!old_head.is_null()) {
2361 old_head->obj_at_put(trace_next_offset, new_head());
2362 }
2363 new_head->obj_at_put(trace_methods_offset, new_methods());
2364 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2365 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2366 new_head->obj_at_put(trace_names_offset, new_names());
2367 new_head->obj_at_put(trace_hidden_offset, nullptr);
2368
2369 _head = new_head();
2370 _methods = new_methods();
2371 _bcis = new_bcis();
2372 _mirrors = new_mirrors();
2373 _names = new_names();
2374 _index = 0;
2375 }
2376
2377 oop backtrace() {
2378 return _backtrace();
2379 }
2380
2381 inline void push(Method* method, int bci, TRAPS) {
2382 // Smear the -1 bci to 0 since the array only holds unsigned
2383 // shorts. The later line number lookup would just smear the -1
2384 // to a 0 even if it could be recorded.
2385 if (bci == SynchronizationEntryBCI) bci = 0;
2386
2387 if (_index >= trace_chunk_size) {
2388 methodHandle mhandle(THREAD, method);
2389 expand(CHECK);
2390 method = mhandle();
2391 }
2392
2393 _methods->ushort_at_put(_index, method->orig_method_idnum());
2394 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2395
2396 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2397 // klass owning the symbols alive so their refcounts aren't decremented.
2398 Symbol* name = method->name();
2399 _names->symbol_at_put(_index, name);
2400
2401 // We need to save the mirrors in the backtrace to keep the class
2402 // from being unloaded while we still have this stack trace.
2403 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2404 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2405
2406 _index++;
2407 }
2408
2409 void set_has_hidden_top_frame() {
2410 if (!_has_hidden_top_frame) {
2411 // It would be nice to add java/lang/Boolean::TRUE here
2412 // to indicate that this backtrace has a hidden top frame.
2413 // But this code is used before TRUE is allocated.
2414 // Therefore let's just use an arbitrary legal oop
2415 // available right here. _methods is a short[].
2416 assert(_methods != nullptr, "we need a legal oop");
2417 _has_hidden_top_frame = true;
2418 _head->obj_at_put(trace_hidden_offset, _methods);
2419 }
2420 }
2421 };
2422
2423 struct BacktraceElement : public StackObj {
2424 int _method_id;
2425 int _bci;
2426 int _version;
2427 Symbol* _name;
2428 Handle _mirror;
2429 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2430 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2431 };
2432
2433 class BacktraceIterator : public StackObj {
2434 int _index;
2435 objArrayHandle _result;
2436 objArrayHandle _mirrors;
2437 typeArrayHandle _methods;
2438 typeArrayHandle _bcis;
2439 typeArrayHandle _names;
2440
2441 void init(objArrayHandle result, Thread* thread) {
2442 // Get method id, bci, version and mirror from chunk
2443 _result = result;
2444 if (_result.not_null()) {
2445 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2446 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2447 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2448 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2449 _index = 0;
2450 }
2451 }
2452 public:
2453 BacktraceIterator(objArrayHandle result, Thread* thread) {
2454 init(result, thread);
2455 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2456 }
2457
2458 BacktraceElement next(Thread* thread) {
2459 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2460 _methods->ushort_at(_index),
2461 Backtrace::version_at(_bcis->int_at(_index)),
2462 Backtrace::bci_at(_bcis->int_at(_index)),
2463 _names->symbol_at(_index));
2464 _index++;
2465
2466 if (_index >= java_lang_Throwable::trace_chunk_size) {
2467 int next_offset = java_lang_Throwable::trace_next_offset;
2468 // Get next chunk
2469 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2470 init(result, thread);
2471 }
2472 return e;
2473 }
2474
2475 bool repeat() {
2476 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2477 }
2478 };
2479
2480
2481 // Print stack trace element to resource allocated buffer
2482 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2483 int version, int bci, Symbol* name) {
2484 ResourceMark rm;
2485
2486 // Get strings and string lengths
2487 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2488 const char* klass_name = holder->external_name();
2489 int buf_len = (int)strlen(klass_name);
2490
2491 char* method_name = name->as_C_string();
2492 buf_len += (int)strlen(method_name);
2493
2494 char* source_file_name = nullptr;
2495 Symbol* source = Backtrace::get_source_file_name(holder, version);
2496 if (source != nullptr) {
2497 source_file_name = source->as_C_string();
2498 buf_len += (int)strlen(source_file_name);
2499 }
2500
2501 char *module_name = nullptr, *module_version = nullptr;
2502 ModuleEntry* module = holder->module();
2503 if (module->is_named()) {
2504 module_name = module->name()->as_C_string();
2505 buf_len += (int)strlen(module_name);
2506 if (module->version() != nullptr) {
2507 module_version = module->version()->as_C_string();
2508 buf_len += (int)strlen(module_version);
2509 }
2510 }
2511
2512 // Allocate temporary buffer with extra space for formatting and line number
2513 const size_t buf_size = buf_len + 64;
2514 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2515
2516 // Print stack trace line in buffer
2517 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2518
2519 // Print module information
2520 if (module_name != nullptr) {
2521 if (module_version != nullptr) {
2522 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2523 } else {
2524 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2525 }
2526 }
2527
2528 // The method can be null if the requested class version is gone
2529 Method* method = holder->method_with_orig_idnum(method_id, version);
2530 if (!version_matches(method, version)) {
2531 strcat(buf, "Redefined)");
2532 } else {
2533 int line_number = Backtrace::get_line_number(method, bci);
2534 if (line_number == -2) {
2535 strcat(buf, "Native Method)");
2536 } else {
2537 if (source_file_name != nullptr && (line_number != -1)) {
2538 // Sourcename and linenumber
2539 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2540 } else if (source_file_name != nullptr) {
2541 // Just sourcename
2542 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2543 } else {
2544 // Neither sourcename nor linenumber
2545 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2546 }
2547 nmethod* nm = method->code();
2548 if (WizardMode && nm != nullptr) {
2549 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2550 }
2551 }
2552 }
2553
2554 st->print_cr("%s", buf);
2555 }
2556
2557 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2558 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2559 int method_id = method->orig_method_idnum();
2560 int version = method->constants()->version();
2561 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2562 }
2563
2564 /**
2565 * Print the throwable message and its stack trace plus all causes by walking the
2566 * cause chain. The output looks the same as of Throwable.printStackTrace().
2567 */
2568 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2569 // First, print the message.
2570 print(throwable(), st);
2571 st->cr();
2572
2573 // Now print the stack trace.
2574 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2575 while (throwable.not_null()) {
2576 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2577 if (result.is_null()) {
2578 st->print_raw_cr("\t<<no stack trace available>>");
2579 return;
2580 }
2581 BacktraceIterator iter(result, THREAD);
2582
2583 while (iter.repeat()) {
2584 BacktraceElement bte = iter.next(THREAD);
2585 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2586 }
2587 if (THREAD->can_call_java()) {
2588 // Call getCause() which doesn't necessarily return the _cause field.
2589 ExceptionMark em(THREAD);
2590 JavaValue cause(T_OBJECT);
2591 JavaCalls::call_virtual(&cause,
2592 throwable,
2593 throwable->klass(),
2594 vmSymbols::getCause_name(),
2595 vmSymbols::void_throwable_signature(),
2596 THREAD);
2597 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2598 if (HAS_PENDING_EXCEPTION) {
2599 CLEAR_PENDING_EXCEPTION;
2600 throwable = Handle();
2601 } else {
2602 throwable = Handle(THREAD, cause.get_oop());
2603 if (throwable.not_null()) {
2604 st->print("Caused by: ");
2605 print(throwable(), st);
2606 st->cr();
2607 }
2608 }
2609 } else {
2610 st->print_raw_cr("<<cannot call Java to get cause>>");
2611 return;
2612 }
2613 }
2614 }
2615
2616 /**
2617 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2618 */
2619 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2620 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2621 JavaValue result(T_VOID);
2622 JavaCalls::call_virtual(&result,
2623 throwable,
2624 vmClasses::Throwable_klass(),
2625 vmSymbols::printStackTrace_name(),
2626 vmSymbols::void_method_signature(),
2627 THREAD);
2628 }
2629
2630 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2631 if (!StackTraceInThrowable) return;
2632 ResourceMark rm(THREAD);
2633
2634 // Start out by clearing the backtrace for this object, in case the VM
2635 // runs out of memory while allocating the stack trace
2636 set_backtrace(throwable(), nullptr);
2637 // Clear lazily constructed Java level stacktrace if refilling occurs
2638 // This is unnecessary in 1.7+ but harmless
2639 clear_stacktrace(throwable());
2640
2641 int max_depth = MaxJavaStackTraceDepth;
2642 JavaThread* thread = THREAD;
2643
2644 BacktraceBuilder bt(CHECK);
2645
2646 // If there is no Java frame just return the method that was being called
2647 // with bci 0
2648 if (!thread->has_last_Java_frame()) {
2649 if (max_depth >= 1 && method() != nullptr) {
2650 bt.push(method(), 0, CHECK);
2651 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2652 set_depth(throwable(), 1);
2653 set_backtrace(throwable(), bt.backtrace());
2654 }
2655 return;
2656 }
2657
2658 // Instead of using vframe directly, this version of fill_in_stack_trace
2659 // basically handles everything by hand. This significantly improved the
2660 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2661 // See bug 6333838 for more details.
2662 // The "ASSERT" here is to verify this method generates the exactly same stack
2663 // trace as utilizing vframe.
2664 #ifdef ASSERT
2665 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2666 #endif
2667 int total_count = 0;
2668 RegisterMap map(thread,
2669 RegisterMap::UpdateMap::skip,
2670 RegisterMap::ProcessFrames::skip,
2671 RegisterMap::WalkContinuation::include);
2672 int decode_offset = 0;
2673 nmethod* nm = nullptr;
2674 bool skip_fillInStackTrace_check = false;
2675 bool skip_throwableInit_check = false;
2676 bool skip_hidden = !ShowHiddenFrames;
2677 bool show_carrier = ShowCarrierFrames;
2678 ContinuationEntry* cont_entry = thread->last_continuation();
2679 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2680 Method* method = nullptr;
2681 int bci = 0;
2682
2683 // Compiled java method case.
2684 if (decode_offset != 0) {
2685 DebugInfoReadStream stream(nm, decode_offset);
2686 decode_offset = stream.read_int();
2687 method = (Method*)nm->metadata_at(stream.read_int());
2688 bci = stream.read_bci();
2689 } else {
2690 if (fr.is_first_frame()) break;
2691
2692 if (Continuation::is_continuation_enterSpecial(fr)) {
2693 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2694 if (!show_carrier && cont_entry->is_virtual_thread()) {
2695 break;
2696 }
2697 cont_entry = cont_entry->parent();
2698 }
2699
2700 address pc = fr.pc();
2701 if (fr.is_interpreted_frame()) {
2702 address bcp;
2703 if (!map.in_cont()) {
2704 bcp = fr.interpreter_frame_bcp();
2705 method = fr.interpreter_frame_method();
2706 } else {
2707 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2708 method = map.stack_chunk()->interpreter_frame_method(fr);
2709 }
2710 bci = method->bci_from(bcp);
2711 fr = fr.sender(&map);
2712 } else {
2713 CodeBlob* cb = fr.cb();
2714 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2715 // but non nmethod
2716 fr = fr.sender(&map);
2717 if (cb == nullptr || !cb->is_nmethod()) {
2718 continue;
2719 }
2720 nm = cb->as_nmethod();
2721 assert(nm->method() != nullptr, "must be");
2722 if (nm->method()->is_native()) {
2723 method = nm->method();
2724 bci = 0;
2725 } else {
2726 PcDesc* pd = nm->pc_desc_at(pc);
2727 decode_offset = pd->scope_decode_offset();
2728 // if decode_offset is not equal to 0, it will execute the
2729 // "compiled java method case" at the beginning of the loop.
2730 continue;
2731 }
2732 }
2733 }
2734 #ifdef ASSERT
2735 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2736 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2737 st.next();
2738 }
2739 #endif
2740
2741 // the format of the stacktrace will be:
2742 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2743 // - 0 or more <init> methods for the exception class (skipped)
2744 // - rest of the stack
2745
2746 if (!skip_fillInStackTrace_check) {
2747 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2748 throwable->is_a(method->method_holder())) {
2749 continue;
2750 }
2751 else {
2752 skip_fillInStackTrace_check = true; // gone past them all
2753 }
2754 }
2755 if (!skip_throwableInit_check) {
2756 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2757
2758 // skip <init> methods of the exception class and superclasses
2759 // This is similar to classic VM.
2760 if (method->name() == vmSymbols::object_initializer_name() &&
2761 throwable->is_a(method->method_holder())) {
2762 continue;
2763 } else {
2764 // there are none or we've seen them all - either way stop checking
2765 skip_throwableInit_check = true;
2766 }
2767 }
2768 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2769 if (skip_hidden) {
2770 if (total_count == 0) {
2771 // The top frame will be hidden from the stack trace.
2772 bt.set_has_hidden_top_frame();
2773 }
2774 continue;
2775 }
2776 }
2777
2778 bt.push(method, bci, CHECK);
2779 total_count++;
2780 }
2781
2782 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2783
2784 // Put completed stack trace into throwable object
2785 set_backtrace(throwable(), bt.backtrace());
2786 set_depth(throwable(), total_count);
2787 }
2788
2789 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2790 // No-op if stack trace is disabled
2791 if (!StackTraceInThrowable) {
2792 return;
2793 }
2794
2795 // Disable stack traces for some preallocated out of memory errors
2796 if (!Universe::should_fill_in_stack_trace(throwable)) {
2797 return;
2798 }
2799
2800 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2801 PreserveExceptionMark pm(THREAD);
2802
2803 fill_in_stack_trace(throwable, method, THREAD);
2804 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2805 // original exception via the PreserveExceptionMark destructor.
2806 CLEAR_PENDING_EXCEPTION;
2807 }
2808
2809 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2810 // Allocate stack trace - backtrace is created but not filled in
2811
2812 // No-op if stack trace is disabled
2813 if (!StackTraceInThrowable) return;
2814 BacktraceBuilder bt(CHECK); // creates a backtrace
2815 set_backtrace(throwable(), bt.backtrace());
2816 }
2817
2818
2819 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2820 // Fill in stack trace into preallocated backtrace (no GC)
2821
2822 // No-op if stack trace is disabled
2823 if (!StackTraceInThrowable) return;
2824
2825 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2826
2827 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2828
2829 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2830 assert(backtrace.not_null(), "backtrace should have been preallocated");
2831
2832 ResourceMark rm(THREAD);
2833 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2834
2835 BacktraceBuilder bt(THREAD, backtrace);
2836
2837 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2838 // methods as preallocated errors aren't created by "java" code.
2839
2840 // fill in as much stack trace as possible
2841 int chunk_count = 0;
2842 for (;!st.at_end(); st.next()) {
2843 bt.push(st.method(), st.bci(), CHECK);
2844 chunk_count++;
2845
2846 // Bail-out for deep stacks
2847 if (chunk_count >= trace_chunk_size) break;
2848 }
2849 set_depth(throwable(), chunk_count);
2850 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2851
2852 // We support the Throwable immutability protocol defined for Java 7.
2853 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2854 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2855 }
2856
2857 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2858 objArrayHandle stack_trace_array_h, TRAPS) {
2859
2860 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2861 THROW(vmSymbols::java_lang_NullPointerException());
2862 }
2863
2864 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2865
2866 if (stack_trace_array_h->length() != depth) {
2867 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2868 }
2869
2870 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2871 BacktraceIterator iter(result, THREAD);
2872
2873 int index = 0;
2874 while (iter.repeat()) {
2875 BacktraceElement bte = iter.next(THREAD);
2876
2877 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2878
2879 if (stack_trace_element.is_null()) {
2880 THROW(vmSymbols::java_lang_NullPointerException());
2881 }
2882
2883 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2884 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2885
2886 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2887 method,
2888 bte._version,
2889 bte._bci,
2890 bte._name,
2891 CHECK);
2892 }
2893 }
2894
2895 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2896 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2897 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2898 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2899 // symbolic stacktrace of 'throwable'.
2900 assert(throwable.not_null(), "shouldn't be");
2901
2902 // Now create the message from the original exception and thread name.
2903 ResourceMark rm(current);
2904 const char *message = nullptr;
2905 oop detailed_message = java_lang_Throwable::message(throwable());
2906 if (detailed_message != nullptr) {
2907 message = java_lang_String::as_utf8_string(detailed_message);
2908 }
2909 stringStream st;
2910 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2911 message == nullptr ? "" : ":");
2912 if (message == nullptr) {
2913 st.print("[in thread \"%s\"]", current->name());
2914 } else {
2915 st.print("%s [in thread \"%s\"]", message, current->name());
2916 }
2917
2918 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2919 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2920 // If new_exception returns a different exception while creating the exception,
2921 // abandon the attempt to save the initialization error and return null.
2922 if (init_error->klass()->name() != exception_name) {
2923 log_info(class, init)("Exception %s thrown while saving initialization exception",
2924 init_error->klass()->external_name());
2925 return Handle();
2926 }
2927
2928 // Call to java to fill in the stack trace and clear declaringClassObject to
2929 // not keep classes alive in the stack trace.
2930 // call this: public StackTraceElement[] getStackTrace()
2931 JavaValue result(T_ARRAY);
2932 JavaCalls::call_virtual(&result, throwable,
2933 vmClasses::Throwable_klass(),
2934 vmSymbols::getStackTrace_name(),
2935 vmSymbols::getStackTrace_signature(),
2936 current);
2937 if (!current->has_pending_exception()){
2938 Handle stack_trace(current, result.get_oop());
2939 assert(stack_trace->is_objArray(), "Should be an array");
2940 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2941 // Clear backtrace because the stacktrace should be used instead.
2942 set_backtrace(init_error(), nullptr);
2943 } else {
2944 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2945 init_error->klass()->external_name());
2946 current->clear_pending_exception();
2947 }
2948
2949 return init_error;
2950 }
2951
2952 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2953 JavaThread* current = JavaThread::current();
2954 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2955 BacktraceIterator iter(result, current);
2956 // No backtrace available.
2957 if (!iter.repeat()) return false;
2958
2959 // If the exception happened in a frame that has been hidden, i.e.,
2960 // omitted from the back trace, we can not compute the message.
2961 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2962 if (hidden != nullptr) {
2963 return false;
2964 }
2965
2966 // Get first backtrace element.
2967 BacktraceElement bte = iter.next(current);
2968
2969 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2970 assert(holder != nullptr, "first element should be non-null");
2971 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2972
2973 // Original version is no longer available.
2974 if (m == nullptr || !version_matches(m, bte._version)) {
2975 return false;
2976 }
2977
2978 *method = m;
2979 *bci = bte._bci;
2980 return true;
2981 }
2982
2983 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2984 // Allocate java.lang.StackTraceElement instance
2985 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2986 assert(k != nullptr, "must be loaded in 1.4+");
2987 if (k->should_be_initialized()) {
2988 k->initialize(CHECK_NULL);
2989 }
2990
2991 Handle element = k->allocate_instance_handle(CHECK_NULL);
2992
2993 int version = method->constants()->version();
2994 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2995 return element();
2996 }
2997
2998 void java_lang_StackTraceElement::fill_in(Handle element,
2999 InstanceKlass* holder, const methodHandle& method,
3000 int version, int bci, Symbol* name, TRAPS) {
3001 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3002
3003 ResourceMark rm(THREAD);
3004 HandleMark hm(THREAD);
3005
3006 // Fill in class name
3007 Handle java_class(THREAD, holder->java_mirror());
3008 oop classname = java_lang_Class::name(java_class, CHECK);
3009 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3010 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3011
3012 oop loader = holder->class_loader();
3013 if (loader != nullptr) {
3014 oop loader_name = java_lang_ClassLoader::name(loader);
3015 if (loader_name != nullptr)
3016 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3017 }
3018
3019 // Fill in method name
3020 oop methodname = StringTable::intern(name, CHECK);
3021 java_lang_StackTraceElement::set_methodName(element(), methodname);
3022
3023 // Fill in module name and version
3024 ModuleEntry* module = holder->module();
3025 if (module->is_named()) {
3026 oop module_name = StringTable::intern(module->name(), CHECK);
3027 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3028 oop module_version;
3029 if (module->version() != nullptr) {
3030 module_version = StringTable::intern(module->version(), CHECK);
3031 } else {
3032 module_version = nullptr;
3033 }
3034 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3035 }
3036
3037 if (method() == nullptr || !version_matches(method(), version)) {
3038 // The method was redefined, accurate line number information isn't available
3039 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3040 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3041 } else {
3042 Symbol* source;
3043 oop source_file;
3044 int line_number;
3045 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3046
3047 java_lang_StackTraceElement::set_fileName(element(), source_file);
3048 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3049 }
3050 }
3051
3052 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3053 InstanceKlass* holder,
3054 int version,
3055 const methodHandle& method,
3056 int bci,
3057 Symbol*& source,
3058 oop& source_file,
3059 int& line_number, TRAPS) {
3060 // Fill in source file name and line number.
3061 source = Backtrace::get_source_file_name(holder, version);
3062 source_file = java_lang_Class::source_file(java_class());
3063 if (source != nullptr) {
3064 // Class was not redefined. We can trust its cache if set,
3065 // else we have to initialize it.
3066 if (source_file == nullptr) {
3067 source_file = StringTable::intern(source, CHECK);
3068 java_lang_Class::set_source_file(java_class(), source_file);
3069 }
3070 } else {
3071 // Class was redefined. Dump the cache if it was set.
3072 if (source_file != nullptr) {
3073 source_file = nullptr;
3074 java_lang_Class::set_source_file(java_class(), source_file);
3075 }
3076 }
3077 line_number = Backtrace::get_line_number(method(), bci);
3078 }
3079
3080 #if INCLUDE_JVMCI
3081 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3082 Symbol*& filename, int& line_number, TRAPS) {
3083 ResourceMark rm(THREAD);
3084 HandleMark hm(THREAD);
3085
3086 filename = nullptr;
3087 line_number = -1;
3088
3089 oop source_file;
3090 int version = method->constants()->version();
3091 InstanceKlass* holder = method->method_holder();
3092 Handle java_class(THREAD, holder->java_mirror());
3093 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3094 }
3095 #endif // INCLUDE_JVMCI
3096
3097 // java_lang_ClassFrameInfo
3098
3099 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3100 int java_lang_ClassFrameInfo::_flags_offset;
3101
3102 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3103 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3104 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3105
3106 void java_lang_ClassFrameInfo::compute_offsets() {
3107 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3108 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3109 }
3110
3111 #if INCLUDE_CDS
3112 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3113 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3114 }
3115 #endif
3116
3117 static int get_flags(const methodHandle& m) {
3118 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS );
3119 if (m->is_initializer()) {
3120 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3121 } else {
3122 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3123 }
3124 if (m->caller_sensitive()) {
3125 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3126 }
3127 if (m->is_hidden()) {
3128 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3129 }
3130 assert((flags & 0xFF000000) == 0, "unexpected flags");
3131 return flags;
3132 }
3133
3134 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3135 return obj->obj_field(_classOrMemberName_offset);
3136 }
3137
3138 int java_lang_ClassFrameInfo::flags(oop obj) {
3139 return obj->int_field(_flags_offset);
3140 }
3141
3142 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3143 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3144 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3145 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3146 stackFrame->int_field_put(_flags_offset, flags);
3147 }
3148
3149 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3150 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3151 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3152 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3153 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3154 stackFrame->int_field_put(_flags_offset, flags);
3155 }
3156
3157
3158 // java_lang_StackFrameInfo
3159
3160 int java_lang_StackFrameInfo::_type_offset;
3161 int java_lang_StackFrameInfo::_name_offset;
3162 int java_lang_StackFrameInfo::_bci_offset;
3163 int java_lang_StackFrameInfo::_version_offset;
3164 int java_lang_StackFrameInfo::_contScope_offset;
3165
3166 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3167 macro(_type_offset, k, "type", object_signature, false); \
3168 macro(_name_offset, k, "name", string_signature, false); \
3169 macro(_bci_offset, k, "bci", int_signature, false); \
3170 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3171
3172 void java_lang_StackFrameInfo::compute_offsets() {
3173 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3174 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3175 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3176 }
3177
3178 #if INCLUDE_CDS
3179 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3180 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3181 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3182 }
3183 #endif
3184
3185 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3186 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3187 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3188 return method;
3189 }
3190
3191 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3192 // set Method* or mid/cpref
3193 HandleMark hm(THREAD);
3194 Handle cont_h(THREAD, cont);
3195 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3196
3197 // set bci
3198 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3199 // method may be redefined; store the version
3200 int version = method->constants()->version();
3201 assert((jushort)version == version, "version should be short");
3202 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3203
3204 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3205 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3206 }
3207
3208 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3209 ResourceMark rm(THREAD);
3210 HandleMark hm(THREAD);
3211
3212 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3213 InstanceKlass* holder = method->method_holder();
3214 short version = stackFrame->short_field(_version_offset);
3215 int bci = stackFrame->int_field(_bci_offset);
3216 Symbol* name = method->name();
3217 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3218 }
3219
3220 oop java_lang_StackFrameInfo::type(oop obj) {
3221 return obj->obj_field(_type_offset);
3222 }
3223
3224 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3225 obj->obj_field_put(_type_offset, value);
3226 }
3227
3228 oop java_lang_StackFrameInfo::name(oop obj) {
3229 return obj->obj_field(_name_offset);
3230 }
3231
3232 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3233 obj->obj_field_put(_name_offset, value);
3234 }
3235
3236 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3237 obj->short_field_put(_version_offset, value);
3238 }
3239
3240 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3241 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3242 obj->int_field_put(_bci_offset, value);
3243 }
3244
3245 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3246 obj->obj_field_put(_contScope_offset, value);
3247 }
3248
3249 int java_lang_LiveStackFrameInfo::_monitors_offset;
3250 int java_lang_LiveStackFrameInfo::_locals_offset;
3251 int java_lang_LiveStackFrameInfo::_operands_offset;
3252 int java_lang_LiveStackFrameInfo::_mode_offset;
3253
3254 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3255 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3256 macro(_locals_offset, k, "locals", object_array_signature, false); \
3257 macro(_operands_offset, k, "operands", object_array_signature, false); \
3258 macro(_mode_offset, k, "mode", int_signature, false)
3259
3260 void java_lang_LiveStackFrameInfo::compute_offsets() {
3261 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3262 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3263 }
3264
3265 #if INCLUDE_CDS
3266 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3267 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3268 }
3269 #endif
3270
3271 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3272 obj->obj_field_put(_monitors_offset, value);
3273 }
3274
3275 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3276 obj->obj_field_put(_locals_offset, value);
3277 }
3278
3279 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3280 obj->obj_field_put(_operands_offset, value);
3281 }
3282
3283 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3284 obj->int_field_put(_mode_offset, value);
3285 }
3286
3287
3288 // java_lang_AccessibleObject
3289
3290 int java_lang_reflect_AccessibleObject::_override_offset;
3291
3292 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3293 macro(_override_offset, k, "override", bool_signature, false)
3294
3295 void java_lang_reflect_AccessibleObject::compute_offsets() {
3296 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3297 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3298 }
3299
3300 #if INCLUDE_CDS
3301 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3302 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3303 }
3304 #endif
3305
3306 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3307 return (jboolean) reflect->bool_field(_override_offset);
3308 }
3309
3310 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3311 reflect->bool_field_put(_override_offset, (int) value);
3312 }
3313
3314 // java_lang_reflect_Method
3315
3316 int java_lang_reflect_Method::_clazz_offset;
3317 int java_lang_reflect_Method::_name_offset;
3318 int java_lang_reflect_Method::_returnType_offset;
3319 int java_lang_reflect_Method::_parameterTypes_offset;
3320 int java_lang_reflect_Method::_exceptionTypes_offset;
3321 int java_lang_reflect_Method::_slot_offset;
3322 int java_lang_reflect_Method::_modifiers_offset;
3323 int java_lang_reflect_Method::_signature_offset;
3324 int java_lang_reflect_Method::_annotations_offset;
3325 int java_lang_reflect_Method::_parameter_annotations_offset;
3326 int java_lang_reflect_Method::_annotation_default_offset;
3327
3328 #define METHOD_FIELDS_DO(macro) \
3329 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3330 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3331 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3332 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3333 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3334 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3335 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3336 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3337 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3338 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3339 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3340
3341 void java_lang_reflect_Method::compute_offsets() {
3342 InstanceKlass* k = vmClasses::reflect_Method_klass();
3343 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3344 }
3345
3346 #if INCLUDE_CDS
3347 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3348 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3349 }
3350 #endif
3351
3352 Handle java_lang_reflect_Method::create(TRAPS) {
3353 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3354 Klass* klass = vmClasses::reflect_Method_klass();
3355 // This class is eagerly initialized during VM initialization, since we keep a reference
3356 // to one of the methods
3357 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3358 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3359 }
3360
3361 oop java_lang_reflect_Method::clazz(oop reflect) {
3362 return reflect->obj_field(_clazz_offset);
3363 }
3364
3365 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3366 reflect->obj_field_put(_clazz_offset, value);
3367 }
3368
3369 int java_lang_reflect_Method::slot(oop reflect) {
3370 return reflect->int_field(_slot_offset);
3371 }
3372
3373 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3374 reflect->int_field_put(_slot_offset, value);
3375 }
3376
3377 void java_lang_reflect_Method::set_name(oop method, oop value) {
3378 method->obj_field_put(_name_offset, value);
3379 }
3380
3381 oop java_lang_reflect_Method::return_type(oop method) {
3382 return method->obj_field(_returnType_offset);
3383 }
3384
3385 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3386 method->obj_field_put(_returnType_offset, value);
3387 }
3388
3389 oop java_lang_reflect_Method::parameter_types(oop method) {
3390 return method->obj_field(_parameterTypes_offset);
3391 }
3392
3393 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3394 method->obj_field_put(_parameterTypes_offset, value);
3395 }
3396
3397 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3398 method->obj_field_put(_exceptionTypes_offset, value);
3399 }
3400
3401 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3402 method->int_field_put(_modifiers_offset, value);
3403 }
3404
3405 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3406 method->obj_field_put(_signature_offset, value);
3407 }
3408
3409 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3410 method->obj_field_put(_annotations_offset, value);
3411 }
3412
3413 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3414 method->obj_field_put(_parameter_annotations_offset, value);
3415 }
3416
3417 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3418 method->obj_field_put(_annotation_default_offset, value);
3419 }
3420
3421 int java_lang_reflect_Constructor::_clazz_offset;
3422 int java_lang_reflect_Constructor::_parameterTypes_offset;
3423 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3424 int java_lang_reflect_Constructor::_slot_offset;
3425 int java_lang_reflect_Constructor::_modifiers_offset;
3426 int java_lang_reflect_Constructor::_signature_offset;
3427 int java_lang_reflect_Constructor::_annotations_offset;
3428 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3429
3430 #define CONSTRUCTOR_FIELDS_DO(macro) \
3431 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3432 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3433 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3434 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3435 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3436 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3437 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3438 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3439
3440 void java_lang_reflect_Constructor::compute_offsets() {
3441 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3442 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3443 }
3444
3445 #if INCLUDE_CDS
3446 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3447 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3448 }
3449 #endif
3450
3451 Handle java_lang_reflect_Constructor::create(TRAPS) {
3452 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3453 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3454 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3455 InstanceKlass* ik = InstanceKlass::cast(k);
3456 // Ensure it is initialized
3457 ik->initialize(CHECK_NH);
3458 return ik->allocate_instance_handle(THREAD);
3459 }
3460
3461 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3462 return reflect->obj_field(_clazz_offset);
3463 }
3464
3465 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3466 reflect->obj_field_put(_clazz_offset, value);
3467 }
3468
3469 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3470 return constructor->obj_field(_parameterTypes_offset);
3471 }
3472
3473 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3474 constructor->obj_field_put(_parameterTypes_offset, value);
3475 }
3476
3477 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3478 constructor->obj_field_put(_exceptionTypes_offset, value);
3479 }
3480
3481 int java_lang_reflect_Constructor::slot(oop reflect) {
3482 return reflect->int_field(_slot_offset);
3483 }
3484
3485 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3486 reflect->int_field_put(_slot_offset, value);
3487 }
3488
3489 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3490 constructor->int_field_put(_modifiers_offset, value);
3491 }
3492
3493 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3494 constructor->obj_field_put(_signature_offset, value);
3495 }
3496
3497 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3498 constructor->obj_field_put(_annotations_offset, value);
3499 }
3500
3501 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3502 method->obj_field_put(_parameter_annotations_offset, value);
3503 }
3504
3505 int java_lang_reflect_Field::_clazz_offset;
3506 int java_lang_reflect_Field::_name_offset;
3507 int java_lang_reflect_Field::_type_offset;
3508 int java_lang_reflect_Field::_slot_offset;
3509 int java_lang_reflect_Field::_modifiers_offset;
3510 int java_lang_reflect_Field::_trusted_final_offset;
3511 int java_lang_reflect_Field::_signature_offset;
3512 int java_lang_reflect_Field::_annotations_offset;
3513
3514 #define FIELD_FIELDS_DO(macro) \
3515 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3516 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3517 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3518 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3519 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3520 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3521 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3522 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3523
3524 void java_lang_reflect_Field::compute_offsets() {
3525 InstanceKlass* k = vmClasses::reflect_Field_klass();
3526 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3527 }
3528
3529 #if INCLUDE_CDS
3530 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3531 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3532 }
3533 #endif
3534
3535 Handle java_lang_reflect_Field::create(TRAPS) {
3536 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3537 Symbol* name = vmSymbols::java_lang_reflect_Field();
3538 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3539 InstanceKlass* ik = InstanceKlass::cast(k);
3540 // Ensure it is initialized
3541 ik->initialize(CHECK_NH);
3542 return ik->allocate_instance_handle(THREAD);
3543 }
3544
3545 oop java_lang_reflect_Field::clazz(oop reflect) {
3546 return reflect->obj_field(_clazz_offset);
3547 }
3548
3549 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3550 reflect->obj_field_put(_clazz_offset, value);
3551 }
3552
3553 oop java_lang_reflect_Field::name(oop field) {
3554 return field->obj_field(_name_offset);
3555 }
3556
3557 void java_lang_reflect_Field::set_name(oop field, oop value) {
3558 field->obj_field_put(_name_offset, value);
3559 }
3560
3561 oop java_lang_reflect_Field::type(oop field) {
3562 return field->obj_field(_type_offset);
3563 }
3564
3565 void java_lang_reflect_Field::set_type(oop field, oop value) {
3566 field->obj_field_put(_type_offset, value);
3567 }
3568
3569 int java_lang_reflect_Field::slot(oop reflect) {
3570 return reflect->int_field(_slot_offset);
3571 }
3572
3573 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3574 reflect->int_field_put(_slot_offset, value);
3575 }
3576
3577 int java_lang_reflect_Field::modifiers(oop field) {
3578 return field->int_field(_modifiers_offset);
3579 }
3580
3581 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3582 field->int_field_put(_modifiers_offset, value);
3583 }
3584
3585 void java_lang_reflect_Field::set_trusted_final(oop field) {
3586 field->bool_field_put(_trusted_final_offset, true);
3587 }
3588
3589 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3590 field->obj_field_put(_signature_offset, value);
3591 }
3592
3593 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3594 field->obj_field_put(_annotations_offset, value);
3595 }
3596
3597 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3598 // Allocate java.lang.reflect.RecordComponent instance
3599 HandleMark hm(THREAD);
3600 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3601 assert(ik != nullptr, "must be loaded");
3602 ik->initialize(CHECK_NULL);
3603
3604 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3605
3606 Handle decl_class(THREAD, holder->java_mirror());
3607 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3608
3609 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3610 oop component_name = StringTable::intern(name, CHECK_NULL);
3611 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3612
3613 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3614 Handle component_type_h =
3615 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3616 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3617
3618 Method* accessor_method = nullptr;
3619 {
3620 // Prepend "()" to type to create the full method signature.
3621 ResourceMark rm(THREAD);
3622 int sig_len = type->utf8_length() + 3; // "()" and null char
3623 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3624 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3625 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3626 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3627 }
3628
3629 if (accessor_method != nullptr) {
3630 methodHandle method(THREAD, accessor_method);
3631 oop m = Reflection::new_method(method, false, CHECK_NULL);
3632 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3633 } else {
3634 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3635 }
3636
3637 int sig_index = component->generic_signature_index();
3638 if (sig_index > 0) {
3639 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3640 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3641 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3642 } else {
3643 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3644 }
3645
3646 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3647 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3648
3649 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3650 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3651
3652 return element();
3653 }
3654
3655 int reflect_ConstantPool::_oop_offset;
3656
3657 #define CONSTANTPOOL_FIELDS_DO(macro) \
3658 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3659
3660 void reflect_ConstantPool::compute_offsets() {
3661 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3662 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3663 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3664 }
3665
3666 #if INCLUDE_CDS
3667 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3668 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3669 }
3670 #endif
3671
3672 int java_lang_reflect_Parameter::_name_offset;
3673 int java_lang_reflect_Parameter::_modifiers_offset;
3674 int java_lang_reflect_Parameter::_index_offset;
3675 int java_lang_reflect_Parameter::_executable_offset;
3676
3677 #define PARAMETER_FIELDS_DO(macro) \
3678 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3679 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3680 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3681 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3682
3683 void java_lang_reflect_Parameter::compute_offsets() {
3684 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3685 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3686 }
3687
3688 #if INCLUDE_CDS
3689 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3690 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3691 }
3692 #endif
3693
3694 Handle java_lang_reflect_Parameter::create(TRAPS) {
3695 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3696 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3697 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3698 InstanceKlass* ik = InstanceKlass::cast(k);
3699 // Ensure it is initialized
3700 ik->initialize(CHECK_NH);
3701 return ik->allocate_instance_handle(THREAD);
3702 }
3703
3704 oop java_lang_reflect_Parameter::name(oop param) {
3705 return param->obj_field(_name_offset);
3706 }
3707
3708 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3709 param->obj_field_put(_name_offset, value);
3710 }
3711
3712 int java_lang_reflect_Parameter::modifiers(oop param) {
3713 return param->int_field(_modifiers_offset);
3714 }
3715
3716 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3717 param->int_field_put(_modifiers_offset, value);
3718 }
3719
3720 int java_lang_reflect_Parameter::index(oop param) {
3721 return param->int_field(_index_offset);
3722 }
3723
3724 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3725 param->int_field_put(_index_offset, value);
3726 }
3727
3728 oop java_lang_reflect_Parameter::executable(oop param) {
3729 return param->obj_field(_executable_offset);
3730 }
3731
3732 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3733 param->obj_field_put(_executable_offset, value);
3734 }
3735
3736 // java_lang_Module
3737
3738 int java_lang_Module::_loader_offset;
3739 int java_lang_Module::_name_offset;
3740 int java_lang_Module::_module_entry_offset;
3741
3742 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3743 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3744 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3745 vmSymbols::java_lang_module_init_signature(),
3746 loader, module_name, CHECK_NH);
3747 }
3748
3749 #define MODULE_FIELDS_DO(macro) \
3750 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3751 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3752
3753 void java_lang_Module::compute_offsets() {
3754 InstanceKlass* k = vmClasses::Module_klass();
3755 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3756 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3757 }
3758
3759 #if INCLUDE_CDS
3760 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3761 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3762 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3763 }
3764 #endif
3765
3766 oop java_lang_Module::loader(oop module) {
3767 return module->obj_field(_loader_offset);
3768 }
3769
3770 void java_lang_Module::set_loader(oop module, oop value) {
3771 module->obj_field_put(_loader_offset, value);
3772 }
3773
3774 oop java_lang_Module::name(oop module) {
3775 return module->obj_field(_name_offset);
3776 }
3777
3778 void java_lang_Module::set_name(oop module, oop value) {
3779 module->obj_field_put(_name_offset, value);
3780 }
3781
3782 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3783 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3784 assert(module != nullptr, "module can't be null");
3785 assert(oopDesc::is_oop(module), "module must be oop");
3786
3787 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3788 return module_entry;
3789 }
3790
3791 ModuleEntry* java_lang_Module::module_entry(oop module) {
3792 ModuleEntry* module_entry = module_entry_raw(module);
3793 if (module_entry == nullptr) {
3794 // If the inject field containing the ModuleEntry* is null then return the
3795 // class loader's unnamed module.
3796 oop loader = java_lang_Module::loader(module);
3797 Handle h_loader = Handle(Thread::current(), loader);
3798 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3799 return loader_cld->unnamed_module();
3800 }
3801 return module_entry;
3802 }
3803
3804 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3805 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3806 assert(module != nullptr, "module can't be null");
3807 assert(oopDesc::is_oop(module), "module must be oop");
3808 module->address_field_put(_module_entry_offset, (address)module_entry);
3809 }
3810
3811 Handle reflect_ConstantPool::create(TRAPS) {
3812 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3813 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3814 // Ensure it is initialized
3815 k->initialize(CHECK_NH);
3816 return k->allocate_instance_handle(THREAD);
3817 }
3818
3819
3820 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3821 oop mirror = value->pool_holder()->java_mirror();
3822 // Save the mirror to get back the constant pool.
3823 reflect->obj_field_put(_oop_offset, mirror);
3824 }
3825
3826 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3827
3828 oop mirror = reflect->obj_field(_oop_offset);
3829 Klass* k = java_lang_Class::as_Klass(mirror);
3830 assert(k->is_instance_klass(), "Must be");
3831
3832 // Get the constant pool back from the klass. Since class redefinition
3833 // merges the new constant pool into the old, this is essentially the
3834 // same constant pool as the original. If constant pool merging is
3835 // no longer done in the future, this will have to change to save
3836 // the original.
3837 return InstanceKlass::cast(k)->constants();
3838 }
3839
3840
3841 // Support for java_lang_ref_Reference
3842
3843 bool java_lang_ref_Reference::_offsets_initialized;
3844
3845 int java_lang_ref_Reference::_referent_offset;
3846 int java_lang_ref_Reference::_queue_offset;
3847 int java_lang_ref_Reference::_next_offset;
3848 int java_lang_ref_Reference::_discovered_offset;
3849
3850 #define REFERENCE_FIELDS_DO(macro) \
3851 macro(_referent_offset, k, "referent", object_signature, false); \
3852 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3853 macro(_next_offset, k, "next", reference_signature, false); \
3854 macro(_discovered_offset, k, "discovered", reference_signature, false);
3855
3856 void java_lang_ref_Reference::compute_offsets() {
3857 if (_offsets_initialized) {
3858 return;
3859 }
3860 _offsets_initialized = true;
3861 InstanceKlass* k = vmClasses::Reference_klass();
3862 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3863 }
3864
3865 #if INCLUDE_CDS
3866 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3867 f->do_bool(&_offsets_initialized);
3868 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3869 }
3870 #endif
3871
3872 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3873 assert(obj != nullptr, "sanity");
3874 if (offset != _referent_offset) {
3875 return false;
3876 }
3877
3878 Klass* k = obj->klass();
3879 if (!k->is_instance_klass()) {
3880 return false;
3881 }
3882
3883 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3884 bool is_reference = ik->reference_type() != REF_NONE;
3885 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3886 return is_reference;
3887 }
3888
3889 int java_lang_boxing_object::_value_offset;
3890 int java_lang_boxing_object::_long_value_offset;
3891
3892 #define BOXING_FIELDS_DO(macro) \
3893 macro(_value_offset, integerKlass, "value", int_signature, false); \
3894 macro(_long_value_offset, longKlass, "value", long_signature, false);
3895
3896 void java_lang_boxing_object::compute_offsets() {
3897 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3898 InstanceKlass* longKlass = vmClasses::Long_klass();
3899 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3900 }
3901
3902 #if INCLUDE_CDS
3903 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3904 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3905 }
3906 #endif
3907
3908 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3909 Klass* k = vmClasses::box_klass(type);
3910 if (k == nullptr) return nullptr;
3911 InstanceKlass* ik = InstanceKlass::cast(k);
3912 if (!ik->is_initialized()) {
3913 ik->initialize(CHECK_NULL);
3914 }
3915 return ik->allocate_instance(THREAD);
3916 }
3917
3918
3919 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3920 oop box = initialize_and_allocate(type, CHECK_NULL);
3921 if (box == nullptr) return nullptr;
3922 switch (type) {
3923 case T_BOOLEAN:
3924 box->bool_field_put(_value_offset, value->z);
3925 break;
3926 case T_CHAR:
3927 box->char_field_put(_value_offset, value->c);
3928 break;
3929 case T_FLOAT:
3930 box->float_field_put(_value_offset, value->f);
3931 break;
3932 case T_DOUBLE:
3933 box->double_field_put(_long_value_offset, value->d);
3934 break;
3935 case T_BYTE:
3936 box->byte_field_put(_value_offset, value->b);
3937 break;
3938 case T_SHORT:
3939 box->short_field_put(_value_offset, value->s);
3940 break;
3941 case T_INT:
3942 box->int_field_put(_value_offset, value->i);
3943 break;
3944 case T_LONG:
3945 box->long_field_put(_long_value_offset, value->j);
3946 break;
3947 default:
3948 return nullptr;
3949 }
3950 return box;
3951 }
3952
3953
3954 BasicType java_lang_boxing_object::basic_type(oop box) {
3955 if (box == nullptr) return T_ILLEGAL;
3956 BasicType type = vmClasses::box_klass_type(box->klass());
3957 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3958 return T_ILLEGAL;
3959 return type;
3960 }
3961
3962
3963 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3964 BasicType type = vmClasses::box_klass_type(box->klass());
3965 switch (type) {
3966 case T_BOOLEAN:
3967 value->z = box->bool_field(_value_offset);
3968 break;
3969 case T_CHAR:
3970 value->c = box->char_field(_value_offset);
3971 break;
3972 case T_FLOAT:
3973 value->f = box->float_field(_value_offset);
3974 break;
3975 case T_DOUBLE:
3976 value->d = box->double_field(_long_value_offset);
3977 break;
3978 case T_BYTE:
3979 value->b = box->byte_field(_value_offset);
3980 break;
3981 case T_SHORT:
3982 value->s = box->short_field(_value_offset);
3983 break;
3984 case T_INT:
3985 value->i = box->int_field(_value_offset);
3986 break;
3987 case T_LONG:
3988 value->j = box->long_field(_long_value_offset);
3989 break;
3990 default:
3991 return T_ILLEGAL;
3992 } // end switch
3993 return type;
3994 }
3995
3996
3997 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3998 BasicType type = vmClasses::box_klass_type(box->klass());
3999 switch (type) {
4000 case T_BOOLEAN:
4001 box->bool_field_put(_value_offset, value->z);
4002 break;
4003 case T_CHAR:
4004 box->char_field_put(_value_offset, value->c);
4005 break;
4006 case T_FLOAT:
4007 box->float_field_put(_value_offset, value->f);
4008 break;
4009 case T_DOUBLE:
4010 box->double_field_put(_long_value_offset, value->d);
4011 break;
4012 case T_BYTE:
4013 box->byte_field_put(_value_offset, value->b);
4014 break;
4015 case T_SHORT:
4016 box->short_field_put(_value_offset, value->s);
4017 break;
4018 case T_INT:
4019 box->int_field_put(_value_offset, value->i);
4020 break;
4021 case T_LONG:
4022 box->long_field_put(_long_value_offset, value->j);
4023 break;
4024 default:
4025 return T_ILLEGAL;
4026 } // end switch
4027 return type;
4028 }
4029
4030
4031 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4032 switch (type) {
4033 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4034 case T_CHAR: st->print("%d", value->c); break;
4035 case T_BYTE: st->print("%d", value->b); break;
4036 case T_SHORT: st->print("%d", value->s); break;
4037 case T_INT: st->print("%d", value->i); break;
4038 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4039 case T_FLOAT: st->print("%f", value->f); break;
4040 case T_DOUBLE: st->print("%lf", value->d); break;
4041 default: st->print("type %d?", type); break;
4042 }
4043 }
4044
4045
4046 // Support for java_lang_ref_SoftReference
4047 //
4048
4049 int java_lang_ref_SoftReference::_timestamp_offset;
4050 int java_lang_ref_SoftReference::_static_clock_offset;
4051
4052 #define SOFTREFERENCE_FIELDS_DO(macro) \
4053 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4054 macro(_static_clock_offset, k, "clock", long_signature, true)
4055
4056 void java_lang_ref_SoftReference::compute_offsets() {
4057 InstanceKlass* k = vmClasses::SoftReference_klass();
4058 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4059 }
4060
4061 #if INCLUDE_CDS
4062 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4063 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4064 }
4065 #endif
4066
4067 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4068 return ref->long_field(_timestamp_offset);
4069 }
4070
4071 jlong java_lang_ref_SoftReference::clock() {
4072 InstanceKlass* ik = vmClasses::SoftReference_klass();
4073 oop base = ik->static_field_base_raw();
4074 return base->long_field(_static_clock_offset);
4075 }
4076
4077 void java_lang_ref_SoftReference::set_clock(jlong value) {
4078 InstanceKlass* ik = vmClasses::SoftReference_klass();
4079 oop base = ik->static_field_base_raw();
4080 base->long_field_put(_static_clock_offset, value);
4081 }
4082
4083 // Support for java_lang_invoke_DirectMethodHandle
4084
4085 int java_lang_invoke_DirectMethodHandle::_member_offset;
4086
4087 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4088 oop member_name = nullptr;
4089 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4090 "a DirectMethodHandle oop is expected");
4091 return dmh->obj_field(_member_offset);
4092 }
4093
4094 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4095 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4096
4097 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4098 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4099 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4100 }
4101
4102 #if INCLUDE_CDS
4103 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4104 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4105 }
4106 #endif
4107
4108 // Support for java_lang_invoke_MethodHandle
4109
4110 int java_lang_invoke_MethodHandle::_type_offset;
4111 int java_lang_invoke_MethodHandle::_form_offset;
4112
4113 int java_lang_invoke_MemberName::_clazz_offset;
4114 int java_lang_invoke_MemberName::_name_offset;
4115 int java_lang_invoke_MemberName::_type_offset;
4116 int java_lang_invoke_MemberName::_flags_offset;
4117 int java_lang_invoke_MemberName::_method_offset;
4118 int java_lang_invoke_MemberName::_vmindex_offset;
4119
4120 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4121 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4122
4123 int java_lang_invoke_LambdaForm::_vmentry_offset;
4124
4125 #define METHODHANDLE_FIELDS_DO(macro) \
4126 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4127 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4128
4129 void java_lang_invoke_MethodHandle::compute_offsets() {
4130 InstanceKlass* k = vmClasses::MethodHandle_klass();
4131 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4132 }
4133
4134 #if INCLUDE_CDS
4135 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4136 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4137 }
4138 #endif
4139
4140 #define MEMBERNAME_FIELDS_DO(macro) \
4141 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4142 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4143 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4144 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4145 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4146
4147 void java_lang_invoke_MemberName::compute_offsets() {
4148 InstanceKlass* k = vmClasses::MemberName_klass();
4149 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4150 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4151 }
4152
4153 #if INCLUDE_CDS
4154 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4155 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4156 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4157 }
4158 #endif
4159
4160 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4161 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4162
4163 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4164 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4165 assert(k != nullptr, "jdk mismatch");
4166 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4167 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4168 }
4169
4170 #if INCLUDE_CDS
4171 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4172 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4173 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4174 }
4175 #endif
4176
4177 #define LAMBDAFORM_FIELDS_DO(macro) \
4178 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4179
4180 void java_lang_invoke_LambdaForm::compute_offsets() {
4181 InstanceKlass* k = vmClasses::LambdaForm_klass();
4182 assert (k != nullptr, "jdk mismatch");
4183 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4184 }
4185
4186 #if INCLUDE_CDS
4187 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4188 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4189 }
4190 #endif
4191
4192 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4193 return obj != nullptr && is_subclass(obj->klass());
4194 }
4195
4196 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4197 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4198
4199 #define NEP_FIELDS_DO(macro) \
4200 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4201 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4202
4203 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4204 return obj != nullptr && is_subclass(obj->klass());
4205 }
4206
4207 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4208 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4209 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4210 }
4211
4212 #if INCLUDE_CDS
4213 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4214 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4215 }
4216 #endif
4217
4218 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4219 return entry->obj_field(_method_type_offset);
4220 }
4221
4222 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4223 return entry->long_field(_downcall_stub_address_offset);
4224 }
4225
4226 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4227 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4228 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4229 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4230 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4231 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4232 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4233
4234 #define ABIDescriptor_FIELDS_DO(macro) \
4235 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4236 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4237 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4238 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4239 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4240 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4241 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4242
4243 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4244 return obj != nullptr && is_subclass(obj->klass());
4245 }
4246
4247 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4248 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4249 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4250 }
4251
4252 #if INCLUDE_CDS
4253 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4254 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4255 }
4256 #endif
4257
4258 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4259 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4260 }
4261
4262 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4263 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4264 }
4265
4266 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4267 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4268 }
4269
4270 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4271 return entry->int_field(_stackAlignment_offset);
4272 }
4273
4274 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4275 return entry->int_field(_shadowSpace_offset);
4276 }
4277
4278 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4279 return entry->obj_field(_scratch1_offset);
4280 }
4281
4282 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4283 return entry->obj_field(_scratch2_offset);
4284 }
4285
4286 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4287 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4288 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4289 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4290
4291 #define VMStorage_FIELDS_DO(macro) \
4292 macro(_type_offset, k, "type", byte_signature, false); \
4293 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4294 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4295 macro(_debugName_offset, k, "debugName", string_signature, false); \
4296
4297 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4298 return obj != nullptr && is_subclass(obj->klass());
4299 }
4300
4301 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4302 InstanceKlass* k = vmClasses::VMStorage_klass();
4303 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4304 }
4305
4306 #if INCLUDE_CDS
4307 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4308 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4309 }
4310 #endif
4311
4312 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4313 return entry->byte_field(_type_offset);
4314 }
4315
4316 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4317 return entry->int_field(_indexOrOffset_offset);
4318 }
4319
4320 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4321 return entry->short_field(_segmentMaskOrSize_offset);
4322 }
4323
4324 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4325 return entry->obj_field(_debugName_offset);
4326 }
4327
4328 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4329 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4330
4331 #define CallConv_FIELDS_DO(macro) \
4332 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4333 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4334
4335 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4336 return obj != nullptr && is_subclass(obj->klass());
4337 }
4338
4339 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4340 InstanceKlass* k = vmClasses::CallConv_klass();
4341 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4342 }
4343
4344 #if INCLUDE_CDS
4345 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4346 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4347 }
4348 #endif
4349
4350 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4351 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4352 }
4353
4354 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4355 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4356 }
4357
4358 oop java_lang_invoke_MethodHandle::type(oop mh) {
4359 return mh->obj_field(_type_offset);
4360 }
4361
4362 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4363 mh->obj_field_put(_type_offset, mtype);
4364 }
4365
4366 oop java_lang_invoke_MethodHandle::form(oop mh) {
4367 assert(_form_offset != 0, "");
4368 return mh->obj_field(_form_offset);
4369 }
4370
4371 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4372 assert(_form_offset != 0, "");
4373 mh->obj_field_put(_form_offset, lform);
4374 }
4375
4376 /// MemberName accessors
4377
4378 oop java_lang_invoke_MemberName::clazz(oop mname) {
4379 assert(is_instance(mname), "wrong type");
4380 return mname->obj_field(_clazz_offset);
4381 }
4382
4383 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4384 assert(is_instance(mname), "wrong type");
4385 mname->obj_field_put(_clazz_offset, clazz);
4386 }
4387
4388 oop java_lang_invoke_MemberName::name(oop mname) {
4389 assert(is_instance(mname), "wrong type");
4390 return mname->obj_field(_name_offset);
4391 }
4392
4393 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4394 assert(is_instance(mname), "wrong type");
4395 mname->obj_field_put(_name_offset, name);
4396 }
4397
4398 oop java_lang_invoke_MemberName::type(oop mname) {
4399 assert(is_instance(mname), "wrong type");
4400 return mname->obj_field(_type_offset);
4401 }
4402
4403 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4404 assert(is_instance(mname), "wrong type");
4405 mname->obj_field_put(_type_offset, type);
4406 }
4407
4408 int java_lang_invoke_MemberName::flags(oop mname) {
4409 assert(is_instance(mname), "wrong type");
4410 return mname->int_field(_flags_offset);
4411 }
4412
4413 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4414 assert(is_instance(mname), "wrong type");
4415 mname->int_field_put(_flags_offset, flags);
4416 }
4417
4418
4419 // Return vmtarget from ResolvedMethodName method field through indirection
4420 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4421 assert(is_instance(mname), "wrong type");
4422 oop method = mname->obj_field(_method_offset);
4423 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4424 }
4425
4426 bool java_lang_invoke_MemberName::is_method(oop mname) {
4427 assert(is_instance(mname), "must be MemberName");
4428 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4429 }
4430
4431 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4432 assert(is_instance(mname), "wrong type");
4433 mname->obj_field_put(_method_offset, resolved_method);
4434 }
4435
4436 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4437 assert(is_instance(mname), "wrong type");
4438 return (intptr_t) mname->address_field(_vmindex_offset);
4439 }
4440
4441 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4442 assert(is_instance(mname), "wrong type");
4443 mname->address_field_put(_vmindex_offset, (address) index);
4444 }
4445
4446
4447 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4448 assert(is_instance(resolved_method), "wrong type");
4449 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4450 assert(m->is_method(), "must be");
4451 return m;
4452 }
4453
4454 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4455 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4456 assert(is_instance(resolved_method), "wrong type");
4457 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4458 }
4459
4460 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4461 assert(is_instance(resolved_method), "wrong type");
4462 resolved_method->obj_field_put(_vmholder_offset, holder);
4463 }
4464
4465 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4466 const Method* method = m();
4467
4468 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4469 oop resolved_method = ResolvedMethodTable::find_method(method);
4470 if (resolved_method != nullptr) {
4471 return resolved_method;
4472 }
4473
4474 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4475 if (!k->is_initialized()) {
4476 k->initialize(CHECK_NULL);
4477 }
4478
4479 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4480
4481 NoSafepointVerifier nsv;
4482
4483 if (method->is_old()) {
4484 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4485 method->get_new_method();
4486 }
4487
4488 InstanceKlass* holder = method->method_holder();
4489
4490 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4491 // Add a reference to the loader (actually mirror because hidden classes may not have
4492 // distinct loaders) to ensure the metadata is kept alive.
4493 // This mirror may be different than the one in clazz field.
4494 set_vmholder(new_resolved_method, holder->java_mirror());
4495
4496 // Set flag in class to indicate this InstanceKlass has entries in the table
4497 // to avoid walking table during redefinition if none of the redefined classes
4498 // have any membernames in the table.
4499 holder->set_has_resolved_methods();
4500
4501 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4502 }
4503
4504 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4505 assert(is_instance(lform), "wrong type");
4506 return lform->obj_field(_vmentry_offset);
4507 }
4508
4509
4510 // Support for java_lang_invoke_MethodType
4511
4512 int java_lang_invoke_MethodType::_rtype_offset;
4513 int java_lang_invoke_MethodType::_ptypes_offset;
4514
4515 #define METHODTYPE_FIELDS_DO(macro) \
4516 macro(_rtype_offset, k, "rtype", class_signature, false); \
4517 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4518
4519 void java_lang_invoke_MethodType::compute_offsets() {
4520 InstanceKlass* k = vmClasses::MethodType_klass();
4521 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4522 }
4523
4524 #if INCLUDE_CDS
4525 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4526 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4527 }
4528 #endif
4529
4530 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4531 st->print("(");
4532 objArrayOop pts = ptypes(mt);
4533 if (pts != nullptr) {
4534 for (int i = 0, limit = pts->length(); i < limit; i++) {
4535 java_lang_Class::print_signature(pts->obj_at(i), st);
4536 }
4537 } else {
4538 st->print("null");
4539 }
4540 st->print(")");
4541 oop rt = rtype(mt);
4542 if (rt != nullptr) {
4543 java_lang_Class::print_signature(rt, st);
4544 } else {
4545 st->print("null");
4546 }
4547 }
4548
4549 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4550 ResourceMark rm;
4551 stringStream buffer(128);
4552 print_signature(mt, &buffer);
4553 const char* sigstr = buffer.base();
4554 int siglen = (int) buffer.size();
4555 Symbol *name;
4556 if (!intern_if_not_found) {
4557 name = SymbolTable::probe(sigstr, siglen);
4558 } else {
4559 name = SymbolTable::new_symbol(sigstr, siglen);
4560 }
4561 return name;
4562 }
4563
4564 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4565 if (mt1 == mt2)
4566 return true;
4567 if (rtype(mt1) != rtype(mt2))
4568 return false;
4569 if (ptype_count(mt1) != ptype_count(mt2))
4570 return false;
4571 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4572 if (ptype(mt1, i) != ptype(mt2, i))
4573 return false;
4574 }
4575 return true;
4576 }
4577
4578 oop java_lang_invoke_MethodType::rtype(oop mt) {
4579 assert(is_instance(mt), "must be a MethodType");
4580 return mt->obj_field(_rtype_offset);
4581 }
4582
4583 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4584 assert(is_instance(mt), "must be a MethodType");
4585 return (objArrayOop) mt->obj_field(_ptypes_offset);
4586 }
4587
4588 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4589 return ptypes(mt)->obj_at(idx);
4590 }
4591
4592 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4593 return ptypes(mt)->length();
4594 }
4595
4596 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4597 objArrayOop pts = ptypes(mt);
4598 int count = pts->length();
4599 int slots = 0;
4600 for (int i = 0; i < count; i++) {
4601 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4602 slots += type2size[bt];
4603 }
4604 return slots;
4605 }
4606
4607 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4608 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4609 return type2size[bt];
4610 }
4611
4612
4613 // Support for java_lang_invoke_CallSite
4614
4615 int java_lang_invoke_CallSite::_target_offset;
4616 int java_lang_invoke_CallSite::_context_offset;
4617
4618 #define CALLSITE_FIELDS_DO(macro) \
4619 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4620 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4621
4622 void java_lang_invoke_CallSite::compute_offsets() {
4623 InstanceKlass* k = vmClasses::CallSite_klass();
4624 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4625 }
4626
4627 #if INCLUDE_CDS
4628 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4629 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4630 }
4631 #endif
4632
4633 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4634 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4635
4636 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4637 return dep_oop;
4638 }
4639
4640 // Support for java_lang_invoke_ConstantCallSite
4641
4642 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4643
4644 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4645 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4646
4647 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4648 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4649 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4650 }
4651
4652 #if INCLUDE_CDS
4653 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4654 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4655 }
4656 #endif
4657
4658 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4659
4660 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4661 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4662
4663 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4664 InstanceKlass* k = vmClasses::Context_klass();
4665 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4666 }
4667
4668 #if INCLUDE_CDS
4669 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4670 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4671 }
4672 #endif
4673
4674 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4675 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4676 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4677 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4678 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4679 return dep_ctx;
4680 }
4681
4682 // Support for java_security_AccessControlContext
4683
4684 int java_security_AccessControlContext::_context_offset;
4685 int java_security_AccessControlContext::_privilegedContext_offset;
4686 int java_security_AccessControlContext::_isPrivileged_offset;
4687 int java_security_AccessControlContext::_isAuthorized_offset;
4688
4689 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4690 macro(_context_offset, k, "context", protectiondomain_signature, false); \
4691 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4692 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
4693 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
4694
4695 void java_security_AccessControlContext::compute_offsets() {
4696 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4697 InstanceKlass* k = vmClasses::AccessControlContext_klass();
4698 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4699 }
4700
4701 #if INCLUDE_CDS
4702 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4703 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4704 }
4705 #endif
4706
4707 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4708 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4709 assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4710 // Ensure klass is initialized
4711 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4712 // Allocate result
4713 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4714 // Fill in values
4715 result->obj_field_put(_context_offset, context());
4716 result->obj_field_put(_privilegedContext_offset, privileged_context());
4717 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4718 result->bool_field_put(_isAuthorized_offset, true);
4719 return result;
4720 }
4721
4722
4723 // Support for java_lang_ClassLoader
4724
4725 int java_lang_ClassLoader::_loader_data_offset;
4726 int java_lang_ClassLoader::_parallelCapable_offset;
4727 int java_lang_ClassLoader::_name_offset;
4728 int java_lang_ClassLoader::_nameAndId_offset;
4729 int java_lang_ClassLoader::_unnamedModule_offset;
4730 int java_lang_ClassLoader::_parent_offset;
4731
4732 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4733 assert(loader != nullptr, "loader must not be null");
4734 assert(oopDesc::is_oop(loader), "loader must be oop");
4735 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4736 }
4737
4738 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4739 assert(loader != nullptr, "loader must not be null");
4740 assert(oopDesc::is_oop(loader), "loader must be oop");
4741 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4742 }
4743
4744 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4745 assert(loader != nullptr, "loader must not be null");
4746 assert(oopDesc::is_oop(loader), "loader must be oop");
4747 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4748 }
4749
4750 #define CLASSLOADER_FIELDS_DO(macro) \
4751 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4752 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4753 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4754 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4755 macro(_parent_offset, k1, "parent", classloader_signature, false)
4756
4757 void java_lang_ClassLoader::compute_offsets() {
4758 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4759 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4760
4761 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4762 }
4763
4764 #if INCLUDE_CDS
4765 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4766 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4767 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4768 }
4769 #endif
4770
4771 oop java_lang_ClassLoader::parent(oop loader) {
4772 assert(is_instance(loader), "loader must be oop");
4773 return loader->obj_field(_parent_offset);
4774 }
4775
4776 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4777 assert(is_instance(loader), "loader must be oop");
4778 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4779 }
4780
4781 // Returns the name field of this class loader. If the name field has not
4782 // been set, null will be returned.
4783 oop java_lang_ClassLoader::name(oop loader) {
4784 assert(is_instance(loader), "loader must be oop");
4785 return loader->obj_field(_name_offset);
4786 }
4787
4788 // Returns the nameAndId field of this class loader. The format is
4789 // as follows:
4790 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4791 // If the defining loader has no name then <qualified-class-name> @<id>
4792 // If built-in loader, then omit '@<id>' as there is only one instance.
4793 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4794 oop java_lang_ClassLoader::nameAndId(oop loader) {
4795 assert(is_instance(loader), "loader must be oop");
4796 return loader->obj_field(_nameAndId_offset);
4797 }
4798
4799 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4800 assert(is_instance(loader), "loader must be oop");
4801 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4802 oop acl = loader;
4803 debug_only(jint loop_count = 0);
4804 // This loop taken verbatim from ClassLoader.java:
4805 do {
4806 acl = parent(acl);
4807 if (cl == acl) {
4808 return true;
4809 }
4810 assert(++loop_count > 0, "loop_count overflow");
4811 } while (acl != nullptr);
4812 return false;
4813 }
4814
4815 bool java_lang_ClassLoader::is_instance(oop obj) {
4816 return obj != nullptr && is_subclass(obj->klass());
4817 }
4818
4819
4820 // For class loader classes, parallelCapable defined
4821 // based on non-null field
4822 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4823 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4824 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4825 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4826 }
4827
4828 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4829 // Fix for 4474172; see evaluation for more details
4830 loader = non_reflection_class_loader(loader);
4831
4832 oop cl = SystemDictionary::java_system_loader();
4833 while(cl != nullptr) {
4834 if (cl == loader) return true;
4835 cl = parent(cl);
4836 }
4837 return false;
4838 }
4839
4840 // Return true if this is one of the class loaders associated with
4841 // the generated bytecodes for serialization constructor returned
4842 // by sun.reflect.ReflectionFactory::newConstructorForSerialization
4843 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4844 if (loader != nullptr) {
4845 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass();
4846 // This might be null in non-1.4 JDKs
4847 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class));
4848 }
4849 return false;
4850 }
4851
4852 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4853 // See whether this is one of the class loaders associated with
4854 // the generated bytecodes for reflection, and if so, "magically"
4855 // delegate to its parent to prevent class loading from occurring
4856 // in places where applications using reflection didn't expect it.
4857 if (is_reflection_class_loader(loader)) {
4858 return parent(loader);
4859 }
4860 return loader;
4861 }
4862
4863 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4864 assert(is_instance(loader), "loader must be oop");
4865 return loader->obj_field(_unnamedModule_offset);
4866 }
4867
4868 // Support for java_lang_System
4869 //
4870
4871 int java_lang_System::_static_in_offset;
4872 int java_lang_System::_static_out_offset;
4873 int java_lang_System::_static_err_offset;
4874 int java_lang_System::_static_security_offset;
4875 int java_lang_System::_static_allow_security_offset;
4876 int java_lang_System::_static_never_offset;
4877
4878 #define SYSTEM_FIELDS_DO(macro) \
4879 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4880 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4881 macro(_static_err_offset, k, "err", print_stream_signature, true); \
4882 macro(_static_security_offset, k, "security", security_manager_signature, true); \
4883 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4884 macro(_static_never_offset, k, "NEVER", int_signature, true)
4885
4886 void java_lang_System::compute_offsets() {
4887 InstanceKlass* k = vmClasses::System_klass();
4888 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4889 }
4890
4891 // This field tells us that a security manager can never be installed so we
4892 // can completely skip populating the ProtectionDomainCacheTable.
4893 bool java_lang_System::allow_security_manager() {
4894 static int initialized = false;
4895 static bool allowed = true; // default
4896 if (!initialized) {
4897 oop base = vmClasses::System_klass()->static_field_base_raw();
4898 int never = base->int_field(_static_never_offset);
4899 allowed = (base->int_field(_static_allow_security_offset) != never);
4900 initialized = true;
4901 }
4902 return allowed;
4903 }
4904
4905 // This field tells us that a security manager is installed.
4906 bool java_lang_System::has_security_manager() {
4907 oop base = vmClasses::System_klass()->static_field_base_raw();
4908 return base->obj_field(_static_security_offset) != nullptr;
4909 }
4910
4911 #if INCLUDE_CDS
4912 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4913 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4914 }
4915 #endif
4916
4917 // Support for jdk_internal_misc_UnsafeConstants
4918 //
4919 class UnsafeConstantsFixup : public FieldClosure {
4920 private:
4921 int _address_size;
4922 int _page_size;
4923 bool _big_endian;
4924 bool _use_unaligned_access;
4925 int _data_cache_line_flush_size;
4926 public:
4927 UnsafeConstantsFixup() {
4928 // round up values for all static final fields
4929 _address_size = sizeof(void*);
4930 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4931 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4932 _use_unaligned_access = UseUnalignedAccesses;
4933 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4934 }
4935
4936 void do_field(fieldDescriptor* fd) {
4937 oop mirror = fd->field_holder()->java_mirror();
4938 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4939 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4940 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4941 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4942 if (fd->name() == vmSymbols::address_size_name()) {
4943 mirror->int_field_put(fd->offset(), _address_size);
4944 } else if (fd->name() == vmSymbols::page_size_name()) {
4945 mirror->int_field_put(fd->offset(), _page_size);
4946 } else if (fd->name() == vmSymbols::big_endian_name()) {
4947 mirror->bool_field_put(fd->offset(), _big_endian);
4948 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4949 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4950 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4951 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4952 } else {
4953 assert(false, "unexpected UnsafeConstants field");
4954 }
4955 }
4956 };
4957
4958 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4959 UnsafeConstantsFixup fixup;
4960 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4961 }
4962
4963
4964 // java_lang_StackTraceElement
4965
4966 int java_lang_StackTraceElement::_methodName_offset;
4967 int java_lang_StackTraceElement::_fileName_offset;
4968 int java_lang_StackTraceElement::_lineNumber_offset;
4969 int java_lang_StackTraceElement::_moduleName_offset;
4970 int java_lang_StackTraceElement::_moduleVersion_offset;
4971 int java_lang_StackTraceElement::_classLoaderName_offset;
4972 int java_lang_StackTraceElement::_declaringClass_offset;
4973 int java_lang_StackTraceElement::_declaringClassObject_offset;
4974
4975 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4976 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4977 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4978 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4979 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4980 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4981 macro(_methodName_offset, k, "methodName", string_signature, false); \
4982 macro(_fileName_offset, k, "fileName", string_signature, false); \
4983 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4984
4985 // Support for java_lang_StackTraceElement
4986 void java_lang_StackTraceElement::compute_offsets() {
4987 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4988 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4989 }
4990
4991 #if INCLUDE_CDS
4992 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4993 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4994 }
4995 #endif
4996
4997 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4998 element->obj_field_put(_fileName_offset, value);
4999 }
5000
5001 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
5002 element->obj_field_put(_declaringClass_offset, value);
5003 }
5004
5005 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5006 element->obj_field_put(_methodName_offset, value);
5007 }
5008
5009 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5010 element->int_field_put(_lineNumber_offset, value);
5011 }
5012
5013 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5014 element->obj_field_put(_moduleName_offset, value);
5015 }
5016
5017 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5018 element->obj_field_put(_moduleVersion_offset, value);
5019 }
5020
5021 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5022 element->obj_field_put(_classLoaderName_offset, value);
5023 }
5024
5025 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5026 element->obj_field_put(_declaringClassObject_offset, value);
5027 }
5028
5029
5030 // java_lang_AssertionStatusDirectives
5031
5032 int java_lang_AssertionStatusDirectives::_classes_offset;
5033 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5034 int java_lang_AssertionStatusDirectives::_packages_offset;
5035 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5036 int java_lang_AssertionStatusDirectives::_deflt_offset;
5037
5038 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5039 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5040 macro(_classes_offset, k, "classes", string_array_signature, false); \
5041 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5042 macro(_packages_offset, k, "packages", string_array_signature, false); \
5043 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5044 macro(_deflt_offset, k, "deflt", bool_signature, false)
5045
5046 void java_lang_AssertionStatusDirectives::compute_offsets() {
5047 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5048 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5049 }
5050
5051 #if INCLUDE_CDS
5052 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5053 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5054 }
5055 #endif
5056
5057 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5058 o->obj_field_put(_classes_offset, val);
5059 }
5060
5061 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5062 o->obj_field_put(_classEnabled_offset, val);
5063 }
5064
5065 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5066 o->obj_field_put(_packages_offset, val);
5067 }
5068
5069 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5070 o->obj_field_put(_packageEnabled_offset, val);
5071 }
5072
5073 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5074 o->bool_field_put(_deflt_offset, val);
5075 }
5076
5077 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5078
5079 #define AOS_FIELDS_DO(macro) \
5080 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5081
5082 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5083 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5084 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5085 }
5086
5087 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5088 assert(_owner_offset != 0, "Must be initialized");
5089 return obj->obj_field(_owner_offset);
5090 }
5091
5092 #if INCLUDE_CDS
5093 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5094 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5095 }
5096 #endif
5097
5098 int vector_VectorPayload::_payload_offset;
5099
5100 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5101 macro(_payload_offset, k, "payload", object_signature, false)
5102
5103 void vector_VectorPayload::compute_offsets() {
5104 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5105 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5106 }
5107
5108 #if INCLUDE_CDS
5109 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5110 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5111 }
5112 #endif
5113
5114 void vector_VectorPayload::set_payload(oop o, oop val) {
5115 o->obj_field_put(_payload_offset, val);
5116 }
5117
5118 bool vector_VectorPayload::is_instance(oop obj) {
5119 return obj != nullptr && is_subclass(obj->klass());
5120 }
5121
5122 int java_lang_Integer_IntegerCache::_static_cache_offset;
5123 int java_lang_Long_LongCache::_static_cache_offset;
5124 int java_lang_Character_CharacterCache::_static_cache_offset;
5125 int java_lang_Short_ShortCache::_static_cache_offset;
5126 int java_lang_Byte_ByteCache::_static_cache_offset;
5127
5128 #define INTEGER_CACHE_FIELDS_DO(macro) \
5129 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5130
5131 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5132 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5133 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5134 }
5135
5136 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5137 oop base = ik->static_field_base_raw();
5138 return objArrayOop(base->obj_field(_static_cache_offset));
5139 }
5140
5141 Symbol* java_lang_Integer_IntegerCache::symbol() {
5142 return vmSymbols::java_lang_Integer_IntegerCache();
5143 }
5144
5145 #if INCLUDE_CDS
5146 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5147 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5148 }
5149 #endif
5150 #undef INTEGER_CACHE_FIELDS_DO
5151
5152 jint java_lang_Integer::value(oop obj) {
5153 jvalue v;
5154 java_lang_boxing_object::get_value(obj, &v);
5155 return v.i;
5156 }
5157
5158 #define LONG_CACHE_FIELDS_DO(macro) \
5159 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5160
5161 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5162 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5163 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5164 }
5165
5166 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5167 oop base = ik->static_field_base_raw();
5168 return objArrayOop(base->obj_field(_static_cache_offset));
5169 }
5170
5171 Symbol* java_lang_Long_LongCache::symbol() {
5172 return vmSymbols::java_lang_Long_LongCache();
5173 }
5174
5175 #if INCLUDE_CDS
5176 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5177 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5178 }
5179 #endif
5180 #undef LONG_CACHE_FIELDS_DO
5181
5182 jlong java_lang_Long::value(oop obj) {
5183 jvalue v;
5184 java_lang_boxing_object::get_value(obj, &v);
5185 return v.j;
5186 }
5187
5188 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5189 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5190
5191 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5192 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5193 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5194 }
5195
5196 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5197 oop base = ik->static_field_base_raw();
5198 return objArrayOop(base->obj_field(_static_cache_offset));
5199 }
5200
5201 Symbol* java_lang_Character_CharacterCache::symbol() {
5202 return vmSymbols::java_lang_Character_CharacterCache();
5203 }
5204
5205 #if INCLUDE_CDS
5206 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5207 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5208 }
5209 #endif
5210 #undef CHARACTER_CACHE_FIELDS_DO
5211
5212 jchar java_lang_Character::value(oop obj) {
5213 jvalue v;
5214 java_lang_boxing_object::get_value(obj, &v);
5215 return v.c;
5216 }
5217
5218 #define SHORT_CACHE_FIELDS_DO(macro) \
5219 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5220
5221 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5222 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5223 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5224 }
5225
5226 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5227 oop base = ik->static_field_base_raw();
5228 return objArrayOop(base->obj_field(_static_cache_offset));
5229 }
5230
5231 Symbol* java_lang_Short_ShortCache::symbol() {
5232 return vmSymbols::java_lang_Short_ShortCache();
5233 }
5234
5235 #if INCLUDE_CDS
5236 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5237 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5238 }
5239 #endif
5240 #undef SHORT_CACHE_FIELDS_DO
5241
5242 jshort java_lang_Short::value(oop obj) {
5243 jvalue v;
5244 java_lang_boxing_object::get_value(obj, &v);
5245 return v.s;
5246 }
5247
5248 #define BYTE_CACHE_FIELDS_DO(macro) \
5249 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5250
5251 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5252 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5253 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5254 }
5255
5256 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5257 oop base = ik->static_field_base_raw();
5258 return objArrayOop(base->obj_field(_static_cache_offset));
5259 }
5260
5261 Symbol* java_lang_Byte_ByteCache::symbol() {
5262 return vmSymbols::java_lang_Byte_ByteCache();
5263 }
5264
5265 #if INCLUDE_CDS
5266 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5267 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5268 }
5269 #endif
5270 #undef BYTE_CACHE_FIELDS_DO
5271
5272 jbyte java_lang_Byte::value(oop obj) {
5273 jvalue v;
5274 java_lang_boxing_object::get_value(obj, &v);
5275 return v.b;
5276 }
5277
5278 int java_lang_Boolean::_static_TRUE_offset;
5279 int java_lang_Boolean::_static_FALSE_offset;
5280
5281 #define BOOLEAN_FIELDS_DO(macro) \
5282 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5283 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5284
5285
5286 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5287 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5288 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5289 }
5290
5291 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5292 oop base = ik->static_field_base_raw();
5293 return base->obj_field(_static_TRUE_offset);
5294 }
5295
5296 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5297 oop base = ik->static_field_base_raw();
5298 return base->obj_field(_static_FALSE_offset);
5299 }
5300
5301 Symbol* java_lang_Boolean::symbol() {
5302 return vmSymbols::java_lang_Boolean();
5303 }
5304
5305 #if INCLUDE_CDS
5306 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5307 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5308 }
5309 #endif
5310 #undef BOOLEAN_CACHE_FIELDS_DO
5311
5312 jboolean java_lang_Boolean::value(oop obj) {
5313 jvalue v;
5314 java_lang_boxing_object::get_value(obj, &v);
5315 return v.z;
5316 }
5317
5318 // java_lang_reflect_RecordComponent
5319
5320 int java_lang_reflect_RecordComponent::_clazz_offset;
5321 int java_lang_reflect_RecordComponent::_name_offset;
5322 int java_lang_reflect_RecordComponent::_type_offset;
5323 int java_lang_reflect_RecordComponent::_accessor_offset;
5324 int java_lang_reflect_RecordComponent::_signature_offset;
5325 int java_lang_reflect_RecordComponent::_annotations_offset;
5326 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5327
5328 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5329 macro(_clazz_offset, k, "clazz", class_signature, false); \
5330 macro(_name_offset, k, "name", string_signature, false); \
5331 macro(_type_offset, k, "type", class_signature, false); \
5332 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5333 macro(_signature_offset, k, "signature", string_signature, false); \
5334 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5335 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5336
5337 // Support for java_lang_reflect_RecordComponent
5338 void java_lang_reflect_RecordComponent::compute_offsets() {
5339 InstanceKlass* k = vmClasses::RecordComponent_klass();
5340 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5341 }
5342
5343 #if INCLUDE_CDS
5344 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5345 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5346 }
5347 #endif
5348
5349 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5350 element->obj_field_put(_clazz_offset, value);
5351 }
5352
5353 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5354 element->obj_field_put(_name_offset, value);
5355 }
5356
5357 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5358 element->obj_field_put(_type_offset, value);
5359 }
5360
5361 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5362 element->obj_field_put(_accessor_offset, value);
5363 }
5364
5365 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5366 element->obj_field_put(_signature_offset, value);
5367 }
5368
5369 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5370 element->obj_field_put(_annotations_offset, value);
5371 }
5372
5373 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5374 element->obj_field_put(_typeAnnotations_offset, value);
5375 }
5376
5377 // java_lang_InternalError
5378 int java_lang_InternalError::_during_unsafe_access_offset;
5379
5380 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5381 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5382 }
5383
5384 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5385 return internal_error->bool_field(_during_unsafe_access_offset);
5386 }
5387
5388 void java_lang_InternalError::compute_offsets() {
5389 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5390 }
5391
5392 #if INCLUDE_CDS
5393 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5394 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5395 }
5396 #endif
5397
5398 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5399 f(java_lang_Class) \
5400 f(java_lang_String) \
5401 f(java_lang_ref_Reference) \
5402 //end
5403
5404 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5405 f(java_lang_System) \
5406 f(java_lang_ClassLoader) \
5407 f(java_lang_Throwable) \
5408 f(java_lang_Thread) \
5409 f(java_lang_Thread_FieldHolder) \
5410 f(java_lang_Thread_Constants) \
5411 f(java_lang_ThreadGroup) \
5412 f(java_lang_VirtualThread) \
5413 f(java_lang_InternalError) \
5414 f(java_lang_AssertionStatusDirectives) \
5415 f(java_lang_ref_SoftReference) \
5416 f(java_lang_invoke_MethodHandle) \
5417 f(java_lang_invoke_DirectMethodHandle) \
5418 f(java_lang_invoke_MemberName) \
5419 f(java_lang_invoke_ResolvedMethodName) \
5420 f(java_lang_invoke_LambdaForm) \
5421 f(java_lang_invoke_MethodType) \
5422 f(java_lang_invoke_CallSite) \
5423 f(java_lang_invoke_ConstantCallSite) \
5424 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5425 f(java_security_AccessControlContext) \
5426 f(java_lang_reflect_AccessibleObject) \
5427 f(java_lang_reflect_Method) \
5428 f(java_lang_reflect_Constructor) \
5429 f(java_lang_reflect_Field) \
5430 f(java_lang_reflect_RecordComponent) \
5431 f(reflect_ConstantPool) \
5432 f(java_lang_reflect_Parameter) \
5433 f(java_lang_Module) \
5434 f(java_lang_StackTraceElement) \
5435 f(java_lang_ClassFrameInfo) \
5436 f(java_lang_StackFrameInfo) \
5437 f(java_lang_LiveStackFrameInfo) \
5438 f(jdk_internal_vm_ContinuationScope) \
5439 f(jdk_internal_vm_Continuation) \
5440 f(jdk_internal_vm_StackChunk) \
5441 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5442 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5443 f(jdk_internal_foreign_abi_ABIDescriptor) \
5444 f(jdk_internal_foreign_abi_VMStorage) \
5445 f(jdk_internal_foreign_abi_CallConv) \
5446 f(jdk_internal_misc_UnsafeConstants) \
5447 f(java_lang_boxing_object) \
5448 f(vector_VectorPayload) \
5449 //end
5450
5451 #define BASIC_JAVA_CLASSES_DO(f) \
5452 BASIC_JAVA_CLASSES_DO_PART1(f) \
5453 BASIC_JAVA_CLASSES_DO_PART2(f)
5454
5455 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5456
5457 // Compute field offsets of all the classes in this file
5458 void JavaClasses::compute_offsets() {
5459 if (CDSConfig::is_using_archive()) {
5460 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5461 JvmtiExport::has_early_class_hook_env()),
5462 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5463 // None of the classes used by the rest of this function can be replaced by
5464 // JVMTI ClassFileLoadHook.
5465 // We are safe to use the archived offsets, which have already been restored
5466 // by JavaClasses::serialize_offsets, without computing the offsets again.
5467 return;
5468 }
5469
5470 // We have already called the compute_offsets() of the
5471 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5472 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5473 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5474 }
5475
5476 #if INCLUDE_CDS
5477 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5478
5479 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5480 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5481 }
5482 #endif
5483
5484 #if INCLUDE_CDS_JAVA_HEAP
5485 bool JavaClasses::is_supported_for_archiving(oop obj) {
5486 Klass* klass = obj->klass();
5487
5488 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed.
5489 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5490 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5491 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5492 // So for now we cannot not support these classes for archiving.
5493 //
5494 // These objects typically are not referenced by static fields, but rather by resolved
5495 // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5496 klass == vmClasses::ResolvedMethodName_klass() ||
5497 klass == vmClasses::MemberName_klass() ||
5498 klass == vmClasses::Context_klass() ||
5499 // It's problematic to archive Reference objects. One of the reasons is that
5500 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5501 klass->is_subclass_of(vmClasses::Reference_klass())) {
5502 return false;
5503 }
5504
5505 return true;
5506 }
5507 #endif
5508
5509 #ifndef PRODUCT
5510
5511 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5512
5513 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5514 const char* field_sig) {
5515 EXCEPTION_MARK;
5516 fieldDescriptor fd;
5517 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5518 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5519 InstanceKlass* ik = InstanceKlass::cast(k);
5520 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5521 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5522 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5523 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5524 return false;
5525 }
5526 if (fd.is_static()) {
5527 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5528 return false;
5529 }
5530 if (fd.offset() == deserialized_offset ) {
5531 return true;
5532 } else {
5533 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5534 klass_name, field_name, deserialized_offset, fd.offset());
5535 return false;
5536 }
5537 }
5538
5539 void JavaClasses::check_offsets() {
5540 bool valid = true;
5541
5542 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5543 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5544
5545 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5546 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5547
5548 // Boxed primitive objects (java_lang_boxing_object)
5549
5550 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5551 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5552 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5553 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5554 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5555 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5556 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5557 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5558
5559 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5560 }
5561
5562 #endif // PRODUCT
5563
5564 int InjectedField::compute_offset() {
5565 InstanceKlass* ik = InstanceKlass::cast(klass());
5566 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5567 if (!may_be_java && !fs.field_flags().is_injected()) {
5568 // Only look at injected fields
5569 continue;
5570 }
5571 if (fs.name() == name() && fs.signature() == signature()) {
5572 return fs.offset();
5573 }
5574 }
5575 ResourceMark rm;
5576 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)" : "");
5577 #ifndef PRODUCT
5578 ik->print();
5579 tty->print_cr("all fields:");
5580 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5581 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5582 }
5583 #endif //PRODUCT
5584 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5585 return -1;
5586 }
5587
5588 void javaClasses_init() {
5589 JavaClasses::compute_offsets();
5590 JavaClasses::check_offsets();
5591 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5592 }