1 /*
2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/archiveBuilder.hpp"
27 #include "cds/archiveHeapLoader.hpp"
28 #include "cds/cdsConfig.hpp"
29 #include "cds/heapShared.hpp"
30 #include "cds/metaspaceShared.hpp"
31 #include "classfile/altHashing.hpp"
32 #include "classfile/classLoaderData.inline.hpp"
33 #include "classfile/javaClasses.inline.hpp"
34 #include "classfile/javaClassesImpl.hpp"
35 #include "classfile/javaThreadStatus.hpp"
36 #include "classfile/moduleEntry.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "code/debugInfo.hpp"
43 #include "code/dependencyContext.hpp"
44 #include "code/pcDesc.hpp"
45 #include "gc/shared/collectedHeap.inline.hpp"
46 #include "interpreter/interpreter.hpp"
47 #include "interpreter/linkResolver.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "logging/logStream.hpp"
51 #include "memory/oopFactory.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/fieldInfo.hpp"
55 #include "oops/fieldStreams.inline.hpp"
56 #include "oops/instanceKlass.inline.hpp"
57 #include "oops/instanceMirrorKlass.hpp"
58 #include "oops/klass.hpp"
59 #include "oops/klass.inline.hpp"
60 #include "oops/method.inline.hpp"
61 #include "oops/objArrayKlass.hpp"
62 #include "oops/objArrayOop.inline.hpp"
63 #include "oops/oopCast.inline.hpp"
64 #include "oops/oop.inline.hpp"
65 #include "oops/symbol.hpp"
66 #include "oops/recordComponent.hpp"
67 #include "oops/typeArrayOop.inline.hpp"
68 #include "prims/jvmtiExport.hpp"
69 #include "prims/methodHandles.hpp"
70 #include "prims/resolvedMethodTable.hpp"
71 #include "runtime/continuationEntry.inline.hpp"
72 #include "runtime/continuationJavaClasses.inline.hpp"
73 #include "runtime/fieldDescriptor.inline.hpp"
74 #include "runtime/frame.inline.hpp"
75 #include "runtime/handles.inline.hpp"
76 #include "runtime/handshake.hpp"
77 #include "runtime/init.hpp"
78 #include "runtime/interfaceSupport.inline.hpp"
79 #include "runtime/java.hpp"
80 #include "runtime/javaCalls.hpp"
81 #include "runtime/javaThread.hpp"
82 #include "runtime/jniHandles.inline.hpp"
83 #include "runtime/reflectionUtils.hpp"
84 #include "runtime/safepoint.hpp"
85 #include "runtime/safepointVerifiers.hpp"
86 #include "runtime/threadSMR.hpp"
87 #include "runtime/vframe.inline.hpp"
88 #include "runtime/vm_version.hpp"
89 #include "utilities/align.hpp"
90 #include "utilities/globalDefinitions.hpp"
91 #include "utilities/growableArray.hpp"
92 #include "utilities/preserveException.hpp"
93 #include "utilities/utf8.hpp"
94 #if INCLUDE_JVMCI
95 #include "jvmci/jvmciJavaClasses.hpp"
96 #endif
97
98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
100
101 InjectedField JavaClasses::_injected_fields[] = {
102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
103 };
104
105 // Register native methods of Object
106 void java_lang_Object::register_natives(TRAPS) {
107 InstanceKlass* obj = vmClasses::Object_klass();
108 Method::register_native(obj, vmSymbols::hashCode_name(),
109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
110 Method::register_native(obj, vmSymbols::wait_name(),
111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
112 Method::register_native(obj, vmSymbols::notify_name(),
113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
114 Method::register_native(obj, vmSymbols::notifyAll_name(),
115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
116 Method::register_native(obj, vmSymbols::clone_name(),
117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
118 }
119
120 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
121 return _injected_fields[(int)id].compute_offset();
122 }
123
124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
125 *field_count = 0;
126
127 vmSymbolID sid = vmSymbols::find_sid(class_name);
128 if (sid == vmSymbolID::NO_SID) {
129 // Only well known classes can inject fields
130 return nullptr;
131 }
132
133 int count = 0;
134 int start = -1;
135
136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \
138 count++; \
139 if (start == -1) { \
140 start = (int)InjectedFieldID::klass##_##name##_enum; \
141 } \
142 }
143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
144 #undef LOOKUP_INJECTED_FIELD
145
146 if (start != -1) {
147 *field_count = count;
148 return _injected_fields + start;
149 }
150 return nullptr;
151 }
152
153
154 // Helpful routine for computing field offsets at run time rather than hardcoding them
155 // Finds local fields only, including static fields. Static field offsets are from the
156 // beginning of the mirror.
157 void JavaClasses::compute_offset(int &dest_offset,
158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
159 bool is_static) {
160 fieldDescriptor fd;
161 if (ik == nullptr) {
162 ResourceMark rm;
163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
164 vm_exit_during_initialization("Invalid layout of well-known class");
165 }
166
167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
168 ResourceMark rm;
169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
170 name_symbol->as_C_string(), signature_symbol->as_C_string());
171 #ifndef PRODUCT
172 // Prints all fields and offsets
173 Log(class) lt;
174 LogStream ls(lt.error());
175 ik->print_on(&ls);
176 #endif //PRODUCT
177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
178 }
179 dest_offset = fd.offset();
180 }
181
182 // Overloading to pass name as a string.
183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
184 const char* name_string, Symbol* signature_symbol,
185 bool is_static) {
186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
187 if (name == nullptr) {
188 ResourceMark rm;
189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
191 }
192 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
193 }
194
195 // java_lang_String
196
197 int java_lang_String::_value_offset;
198 int java_lang_String::_hash_offset;
199 int java_lang_String::_hashIsZero_offset;
200 int java_lang_String::_coder_offset;
201 int java_lang_String::_flags_offset;
202
203 bool java_lang_String::_initialized;
204
205
206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
207 uint8_t* addr = flags_addr(java_string);
208 uint8_t value = Atomic::load(addr);
209 while ((value & flag_mask) == 0) {
210 uint8_t old_value = value;
211 value |= flag_mask;
212 value = Atomic::cmpxchg(addr, old_value, value);
213 if (value == old_value) return false; // Flag bit changed from 0 to 1.
214 }
215 return true; // Flag bit is already 1.
216 }
217
218 #define STRING_FIELDS_DO(macro) \
219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
220 macro(_hash_offset, k, "hash", int_signature, false); \
221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
222 macro(_coder_offset, k, "coder", byte_signature, false);
223
224 void java_lang_String::compute_offsets() {
225 if (_initialized) {
226 return;
227 }
228
229 InstanceKlass* k = vmClasses::String_klass();
230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
232
233 _initialized = true;
234 }
235
236 #if INCLUDE_CDS
237 void java_lang_String::serialize_offsets(SerializeClosure* f) {
238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
240 f->do_bool(&_initialized);
241 }
242 #endif
243
244 class CompactStringsFixup : public FieldClosure {
245 private:
246 bool _value;
247
248 public:
249 CompactStringsFixup(bool value) : _value(value) {}
250
251 void do_field(fieldDescriptor* fd) {
252 if (fd->name() == vmSymbols::compact_strings_name()) {
253 oop mirror = fd->field_holder()->java_mirror();
254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
255 assert(mirror != nullptr, "String must have mirror already");
256 mirror->bool_field_put(fd->offset(), _value);
257 }
258 }
259 };
260
261 void java_lang_String::set_compact_strings(bool value) {
262 CompactStringsFixup fix(value);
263 vmClasses::String_klass()->do_local_static_fields(&fix);
264 }
265
266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
267 assert(_initialized, "Must be initialized");
268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
269
270 // Create the String object first, so there's a chance that the String
271 // and the char array it points to end up in the same cache line.
272 oop obj;
273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
274
275 // Create the char array. The String object must be handlized here
276 // because GC can happen as a result of the allocation attempt.
277 Handle h_obj(THREAD, obj);
278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
280
281 // Point the String at the char array
282 obj = h_obj();
283 set_value(obj, buffer);
284 // No need to zero the offset, allocation zero'ed the entire String object
285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
286 return h_obj;
287 }
288
289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
292 typeArrayOop buffer = value(h_obj());
293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
294 if (is_latin1) {
295 for (int index = 0; index < length; index++) {
296 buffer->byte_at_put(index, (jbyte)unicode[index]);
297 }
298 } else {
299 for (int index = 0; index < length; index++) {
300 buffer->char_at_put(index, unicode[index]);
301 }
302 }
303
304 #ifdef ASSERT
305 {
306 ResourceMark rm;
307 size_t utf8_len = static_cast<size_t>(length);
308 char* expected = UNICODE::as_utf8(unicode, utf8_len);
309 char* actual = as_utf8_string(h_obj());
310 if (strcmp(expected, actual) != 0) {
311 fatal("Unicode conversion failure: %s --> %s", expected, actual);
312 }
313 }
314 #endif
315
316 return h_obj;
317 }
318
319 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
320 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
321 return h_obj();
322 }
323
324 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
325 if (utf8_str == nullptr) {
326 return Handle();
327 }
328 bool has_multibyte, is_latin1;
329 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
330 if (!CompactStrings) {
331 has_multibyte = true;
332 is_latin1 = false;
333 }
334
335 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
336 if (length > 0) {
337 if (!has_multibyte) {
338 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
339 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
340 } else if (is_latin1) {
341 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
342 } else {
343 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
344 }
345 }
346
347 #ifdef ASSERT
348 // This check is too strict when the input string is not a valid UTF8.
349 // For example, it may be created with arbitrary content via jni_NewStringUTF.
350 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), false)) {
351 ResourceMark rm;
352 const char* expected = utf8_str;
353 char* actual = as_utf8_string(h_obj());
354 if (strcmp(expected, actual) != 0) {
355 fatal("String conversion failure: %s --> %s", expected, actual);
356 }
357 }
358 #endif
359
360 return h_obj;
361 }
362
363 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
364 Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
365 return h_obj();
366 }
367
368 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
369 const char* utf8_str = (char*)symbol->bytes();
370 int utf8_len = symbol->utf8_length();
371
372 bool has_multibyte, is_latin1;
373 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
374 if (!CompactStrings) {
375 has_multibyte = true;
376 is_latin1 = false;
377 }
378
379 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
380 if (length > 0) {
381 if (!has_multibyte) {
382 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
383 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
384 } else if (is_latin1) {
385 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
386 } else {
387 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
388 }
389 }
390
391 #ifdef ASSERT
392 {
393 ResourceMark rm;
394 const char* expected = symbol->as_utf8();
395 char* actual = as_utf8_string(h_obj());
396 if (strncmp(expected, actual, utf8_len) != 0) {
397 fatal("Symbol conversion failure: %s --> %s", expected, actual);
398 }
399 }
400 #endif
401
402 return h_obj;
403 }
404
405 // Converts a C string to a Java String based on current encoding
406 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
407 assert(str != nullptr, "bad arguments");
408
409 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
410 static to_java_string_fn_t _to_java_string_fn = nullptr;
411
412 if (_to_java_string_fn == nullptr) {
413 void *lib_handle = os::native_java_library();
414 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
415 #if defined(_WIN32) && !defined(_WIN64)
416 if (_to_java_string_fn == nullptr) {
417 // On 32 bit Windows, also try __stdcall decorated name
418 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
419 }
420 #endif
421 if (_to_java_string_fn == nullptr) {
422 fatal("JNU_NewStringPlatform missing");
423 }
424 }
425
426 jstring js = nullptr;
427 {
428 JavaThread* thread = THREAD;
429 HandleMark hm(thread);
430 ThreadToNativeFromVM ttn(thread);
431 js = (_to_java_string_fn)(thread->jni_environment(), str);
432 }
433
434 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
435 JNIHandles::destroy_local(js); // destroy local JNIHandle.
436 return native_platform_string;
437 }
438
439 // Converts a Java String to a native C string that can be used for
440 // native OS calls.
441 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
442 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
443 static to_platform_string_fn_t _to_platform_string_fn = nullptr;
444
445 if (_to_platform_string_fn == nullptr) {
446 void *lib_handle = os::native_java_library();
447 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
448 if (_to_platform_string_fn == nullptr) {
449 fatal("GetStringPlatformChars missing");
450 }
451 }
452
453 char *native_platform_string;
454 jstring js;
455 { JavaThread* thread = THREAD;
456 js = (jstring) JNIHandles::make_local(thread, java_string());
457 HandleMark hm(thread);
458 ThreadToNativeFromVM ttn(thread);
459 JNIEnv *env = thread->jni_environment();
460 bool is_copy;
461 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
462 assert(is_copy == JNI_TRUE, "is_copy value changed");
463 }
464
465 // Uses a store barrier and therefore needs to be in vm state
466 JNIHandles::destroy_local(js);
467
468 return native_platform_string;
469 }
470
471 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
472 ResourceMark rm(THREAD);
473 return create_from_str(java_name->as_klass_external_name(), THREAD);
474 }
475
476 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
477 jchar* result = as_unicode_string_or_null(java_string, length);
478 if (result == nullptr) {
479 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
480 }
481 return result;
482 }
483
484 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
485 typeArrayOop value = java_lang_String::value(java_string);
486 length = java_lang_String::length(java_string, value);
487 bool is_latin1 = java_lang_String::is_latin1(java_string);
488
489 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
490 if (result != nullptr) {
491 if (!is_latin1) {
492 for (int index = 0; index < length; index++) {
493 result[index] = value->char_at(index);
494 }
495 } else {
496 for (int index = 0; index < length; index++) {
497 result[index] = ((jchar) value->byte_at(index)) & 0xff;
498 }
499 }
500 }
501 return result;
502 }
503
504 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
505 // The hash and hashIsZero fields are subject to a benign data race,
506 // making it crucial to ensure that any observable result of the
507 // calculation in this method stays correct under any possible read of
508 // these fields. Necessary restrictions to allow this to be correct
509 // without explicit memory fences or similar concurrency primitives is
510 // that we can ever only write to one of these two fields for a given
511 // String instance, and that the computation is idempotent and derived
512 // from immutable state
513 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
514 if (java_lang_String::hash_is_set(java_string)) {
515 return java_string->int_field(_hash_offset);
516 }
517
518 typeArrayOop value = java_lang_String::value(java_string);
519 int length = java_lang_String::length(java_string, value);
520 bool is_latin1 = java_lang_String::is_latin1(java_string);
521
522 unsigned int hash = 0;
523 if (length > 0) {
524 if (is_latin1) {
525 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
526 } else {
527 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
528 }
529 }
530
531 if (update) {
532 if (hash != 0) {
533 java_string->int_field_put(_hash_offset, hash);
534 } else {
535 java_string->bool_field_put(_hashIsZero_offset, true);
536 }
537 }
538 return hash;
539 }
540
541 unsigned int java_lang_String::hash_code(oop java_string) {
542 return hash_code_impl(java_string, /*update=*/true);
543 }
544
545 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
546 return hash_code_impl(java_string, /*update=*/false);
547 }
548
549
550 char* java_lang_String::as_quoted_ascii(oop java_string) {
551 typeArrayOop value = java_lang_String::value(java_string);
552 int length = java_lang_String::length(java_string, value);
553 bool is_latin1 = java_lang_String::is_latin1(java_string);
554
555 if (length == 0) return nullptr;
556
557 char* result;
558 size_t result_length;
559 if (!is_latin1) {
560 jchar* base = value->char_at_addr(0);
561 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
562 result = NEW_RESOURCE_ARRAY(char, result_length);
563 UNICODE::as_quoted_ascii(base, length, result, result_length);
564 } else {
565 jbyte* base = value->byte_at_addr(0);
566 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
567 result = NEW_RESOURCE_ARRAY(char, result_length);
568 UNICODE::as_quoted_ascii(base, length, result, result_length);
569 }
570 assert(result_length >= (size_t)length + 1, "must not be shorter");
571 assert(result_length == strlen(result) + 1, "must match");
572 return result;
573 }
574
575 Symbol* java_lang_String::as_symbol(oop java_string) {
576 typeArrayOop value = java_lang_String::value(java_string);
577 int length = java_lang_String::length(java_string, value);
578 bool is_latin1 = java_lang_String::is_latin1(java_string);
579 if (!is_latin1) {
580 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
581 Symbol* sym = SymbolTable::new_symbol(base, length);
582 return sym;
583 } else {
584 ResourceMark rm;
585 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
586 size_t utf8_len = static_cast<size_t>(length);
587 const char* base = UNICODE::as_utf8(position, utf8_len);
588 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
589 return sym;
590 }
591 }
592
593 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
594 typeArrayOop value = java_lang_String::value(java_string);
595 int length = java_lang_String::length(java_string, value);
596 bool is_latin1 = java_lang_String::is_latin1(java_string);
597 if (!is_latin1) {
598 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
599 return SymbolTable::probe_unicode(base, length);
600 } else {
601 ResourceMark rm;
602 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
603 size_t utf8_len = static_cast<size_t>(length);
604 const char* base = UNICODE::as_utf8(position, utf8_len);
605 return SymbolTable::probe(base, checked_cast<int>(utf8_len));
606 }
607 }
608
609 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
610 assert(value_equals(value, java_lang_String::value(java_string)),
611 "value must be same as java_lang_String::value(java_string)");
612 int length = java_lang_String::length(java_string, value);
613 if (length == 0) {
614 return 0;
615 }
616 if (!java_lang_String::is_latin1(java_string)) {
617 return UNICODE::utf8_length(value->char_at_addr(0), length);
618 } else {
619 return UNICODE::utf8_length(value->byte_at_addr(0), length);
620 }
621 }
622
623 size_t java_lang_String::utf8_length(oop java_string) {
624 typeArrayOop value = java_lang_String::value(java_string);
625 return utf8_length(java_string, value);
626 }
627
628 int java_lang_String::utf8_length_as_int(oop java_string) {
629 typeArrayOop value = java_lang_String::value(java_string);
630 return utf8_length_as_int(java_string, value);
631 }
632
633 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
634 assert(value_equals(value, java_lang_String::value(java_string)),
635 "value must be same as java_lang_String::value(java_string)");
636 int length = java_lang_String::length(java_string, value);
637 if (length == 0) {
638 return 0;
639 }
640 if (!java_lang_String::is_latin1(java_string)) {
641 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
642 } else {
643 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
644 }
645 }
646
647 char* java_lang_String::as_utf8_string(oop java_string) {
648 size_t length;
649 return as_utf8_string(java_string, length);
650 }
651
652 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
653 typeArrayOop value = java_lang_String::value(java_string);
654 // `length` is used as the incoming number of characters to
655 // convert, and then set as the number of bytes in the UTF8 sequence.
656 length = java_lang_String::length(java_string, value);
657 bool is_latin1 = java_lang_String::is_latin1(java_string);
658 if (!is_latin1) {
659 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
660 return UNICODE::as_utf8(position, length);
661 } else {
662 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
663 return UNICODE::as_utf8(position, length);
664 }
665 }
666
667 // Uses a provided buffer if it's sufficiently large, otherwise allocates
668 // a resource array to fit
669 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
670 typeArrayOop value = java_lang_String::value(java_string);
671 int len = java_lang_String::length(java_string, value);
672 bool is_latin1 = java_lang_String::is_latin1(java_string);
673 if (!is_latin1) {
674 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
675 utf8_len = UNICODE::utf8_length(position, len);
676 if (utf8_len >= buflen) {
677 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
678 }
679 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
680 } else {
681 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
682 utf8_len = UNICODE::utf8_length(position, len);
683 if (utf8_len >= buflen) {
684 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
685 }
686 return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
687 }
688 }
689
690 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
691 assert(value_equals(value, java_lang_String::value(java_string)),
692 "value must be same as java_lang_String::value(java_string)");
693 int length = java_lang_String::length(java_string, value);
694 bool is_latin1 = java_lang_String::is_latin1(java_string);
695 if (!is_latin1) {
696 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
697 return UNICODE::as_utf8(position, length, buf, buflen);
698 } else {
699 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
700 return UNICODE::as_utf8(position, length, buf, buflen);
701 }
702 }
703
704 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
705 typeArrayOop value = java_lang_String::value(java_string);
706 return as_utf8_string(java_string, value, buf, buflen);
707 }
708
709 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
710 // `length` is used as the incoming number of characters to
711 // convert, and then set as the number of bytes in the UTF8 sequence.
712 size_t length = static_cast<size_t>(len);
713 typeArrayOop value = java_lang_String::value(java_string);
714 bool is_latin1 = java_lang_String::is_latin1(java_string);
715 assert(start + len <= java_lang_String::length(java_string), "just checking");
716 if (!is_latin1) {
717 jchar* position = value->char_at_addr(start);
718 return UNICODE::as_utf8(position, length);
719 } else {
720 jbyte* position = value->byte_at_addr(start);
721 return UNICODE::as_utf8(position, length);
722 }
723 }
724
725 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
726 assert(value_equals(value, java_lang_String::value(java_string)),
727 "value must be same as java_lang_String::value(java_string)");
728 assert(start + len <= java_lang_String::length(java_string), "just checking");
729 bool is_latin1 = java_lang_String::is_latin1(java_string);
730 if (!is_latin1) {
731 jchar* position = value->char_at_addr(start);
732 return UNICODE::as_utf8(position, len, buf, buflen);
733 } else {
734 jbyte* position = value->byte_at_addr(start);
735 return UNICODE::as_utf8(position, len, buf, buflen);
736 }
737 }
738
739 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
740 assert(java_string->klass() == vmClasses::String_klass(),
741 "must be java_string");
742 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
743 int length = java_lang_String::length(java_string, value);
744 if (length != len) {
745 return false;
746 }
747 bool is_latin1 = java_lang_String::is_latin1(java_string);
748 if (!is_latin1) {
749 for (int i = 0; i < len; i++) {
750 if (value->char_at(i) != chars[i]) {
751 return false;
752 }
753 }
754 } else {
755 for (int i = 0; i < len; i++) {
756 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
757 return false;
758 }
759 }
760 }
761 return true;
762 }
763
764 bool java_lang_String::equals(oop str1, oop str2) {
765 assert(str1->klass() == vmClasses::String_klass(),
766 "must be java String");
767 assert(str2->klass() == vmClasses::String_klass(),
768 "must be java String");
769 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
770 bool is_latin1 = java_lang_String::is_latin1(str1);
771 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
772 bool is_latin2 = java_lang_String::is_latin1(str2);
773
774 if (is_latin1 != is_latin2) {
775 // Strings with different coders are never equal.
776 return false;
777 }
778 return value_equals(value1, value2);
779 }
780
781 // Print the given string to the given outputStream, limiting the output to
782 // at most max_length of the string's characters. If the length exceeds the
783 // limit we print an abridged version of the string with the "middle" elided
784 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
785 // it is treated as max_length-1.
786 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
787 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
788 // We need at least two characters to print A ... B
789 assert(max_length > 1, "invalid max_length: %d", max_length);
790
791 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
792
793 if (value == nullptr) {
794 // This can happen if, e.g., printing a String
795 // object before its initializer has been called
796 st->print("nullptr");
797 return;
798 }
799
800 int length = java_lang_String::length(java_string, value);
801 bool is_latin1 = java_lang_String::is_latin1(java_string);
802
803 bool abridge = length > max_length;
804
805 st->print("\"");
806 for (int index = 0; index < length; index++) {
807 // If we need to abridge and we've printed half the allowed characters
808 // then jump to the tail of the string.
809 if (abridge && index >= max_length / 2) {
810 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
811 index = length - (max_length / 2);
812 abridge = false; // only do this once
813 }
814 jchar c = (!is_latin1) ? value->char_at(index) :
815 ((jchar) value->byte_at(index)) & 0xff;
816 if (c < ' ') {
817 st->print("\\x%02X", c); // print control characters e.g. \x0A
818 } else {
819 st->print("%c", c);
820 }
821 }
822 st->print("\"");
823
824 if (length > max_length) {
825 st->print(" (abridged) ");
826 }
827 }
828
829 // java_lang_Class
830
831 int java_lang_Class::_klass_offset;
832 int java_lang_Class::_array_klass_offset;
833 int java_lang_Class::_oop_size_offset;
834 int java_lang_Class::_static_oop_field_count_offset;
835 int java_lang_Class::_class_loader_offset;
836 int java_lang_Class::_module_offset;
837 int java_lang_Class::_protection_domain_offset;
838 int java_lang_Class::_component_mirror_offset;
839 int java_lang_Class::_init_lock_offset;
840 int java_lang_Class::_signers_offset;
841 int java_lang_Class::_name_offset;
842 int java_lang_Class::_source_file_offset;
843 int java_lang_Class::_classData_offset;
844 int java_lang_Class::_classRedefinedCount_offset;
845
846 bool java_lang_Class::_offsets_computed = false;
847 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
848 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
849
850 #ifdef ASSERT
851 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
852 assert(fd->has_initial_value(), "caller should have checked this");
853 assert(fd->field_type() == T_OBJECT, "caller should have checked this");
854 assert(fd->signature() == vmSymbols::string_signature(), "just checking");
855 }
856 #endif
857
858 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
859 DEBUG_ONLY(assert_valid_static_string_field(fd);)
860 oop string = fd->string_initial_value(CHECK);
861 mirror()->obj_field_put(fd->offset(), string);
862 }
863
864 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
865 assert(fd->has_initial_value(), "caller should have checked this");
866 BasicType t = fd->field_type();
867 switch (t) {
868 case T_BYTE:
869 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
870 break;
871 case T_BOOLEAN:
872 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
873 break;
874 case T_CHAR:
875 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
876 break;
877 case T_SHORT:
878 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
879 break;
880 case T_INT:
881 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
882 break;
883 case T_FLOAT:
884 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
885 break;
886 case T_DOUBLE:
887 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
888 break;
889 case T_LONG:
890 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
891 break;
892 default:
893 // Illegal ConstantValue attribute in class file should have been
894 // caught during classfile parsing.
895 ShouldNotReachHere();
896 }
897 }
898
899 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
900 assert(mirror.not_null() && fd->is_static(), "just checking");
901 if (fd->has_initial_value()) {
902 if (fd->field_type() != T_OBJECT) {
903 initialize_static_primitive_field(fd, mirror);
904 } else {
905 initialize_static_string_field(fd, mirror, CHECK);
906 }
907 }
908 }
909
910 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
911 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
912
913 // If the offset was read from the shared archive, it was fixed up already
914 if (!k->is_shared()) {
915 if (k->is_instance_klass()) {
916 // During bootstrap, java.lang.Class wasn't loaded so static field
917 // offsets were computed without the size added it. Go back and
918 // update all the static field offsets to included the size.
919
920 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
921 // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
922 // static fields offsets are updated in this array before reencoding everything into
923 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
924
925 int java_fields;
926 int injected_fields;
927 InstanceKlass* ik = InstanceKlass::cast(k);
928 GrowableArray<FieldInfo>* fields =
929 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
930 &java_fields, &injected_fields);
931 for (int i = 0; i < fields->length(); i++) {
932 FieldInfo* fi = fields->adr_at(i);
933 if (fi->access_flags().is_static()) {
934 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
935 }
936 }
937 Array<u1>* old_stream = ik->fieldinfo_stream();
938 assert(fields->length() == (java_fields + injected_fields), "Must be");
939 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
940 ik->set_fieldinfo_stream(new_fis);
941 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
942 }
943 }
944
945 if (k->is_shared() && k->has_archived_mirror_index()) {
946 if (ArchiveHeapLoader::is_in_use()) {
947 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
948 assert(present, "Missing archived mirror for %s", k->external_name());
949 return;
950 } else {
951 k->clear_java_mirror_handle();
952 k->clear_archived_mirror_index();
953 }
954 }
955 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
956 }
957
958 void java_lang_Class::initialize_mirror_fields(Klass* k,
959 Handle mirror,
960 Handle protection_domain,
961 Handle classData,
962 TRAPS) {
963 // Allocate a simple java object for a lock.
964 // This needs to be a java object because during class initialization
965 // it can be held across a java call.
966 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
967 set_init_lock(mirror(), r);
968
969 // Set protection domain also
970 set_protection_domain(mirror(), protection_domain());
971
972 // Initialize static fields
973 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
974
975 // Set classData
976 set_class_data(mirror(), classData());
977 }
978
979 // Set the java.lang.Module module field in the java_lang_Class mirror
980 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
981 if (module.is_null()) {
982 // During startup, the module may be null only if java.base has not been defined yet.
983 // Put the class on the fixup_module_list to patch later when the java.lang.Module
984 // for java.base is known. But note that since we captured the null module another
985 // thread may have completed that initialization.
986
987 bool javabase_was_defined = false;
988 {
989 MutexLocker m1(current, Module_lock);
990 // Keep list of classes needing java.base module fixup
991 if (!ModuleEntryTable::javabase_defined()) {
992 assert(k->java_mirror() != nullptr, "Class's mirror is null");
993 k->class_loader_data()->inc_keep_alive_ref_count();
994 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
995 fixup_module_field_list()->push(k);
996 } else {
997 javabase_was_defined = true;
998 }
999 }
1000
1001 // If java.base was already defined then patch this particular class with java.base.
1002 if (javabase_was_defined) {
1003 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1004 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
1005 "Setting class module field, " JAVA_BASE_NAME " should be defined");
1006 Handle javabase_handle(current, javabase_entry->module());
1007 set_module(mirror(), javabase_handle());
1008 }
1009 } else {
1010 assert(Universe::is_module_initialized() ||
1011 (ModuleEntryTable::javabase_defined() &&
1012 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
1013 "Incorrect java.lang.Module specification while creating mirror");
1014 set_module(mirror(), module());
1015 }
1016 }
1017
1018 // Statically allocate fixup lists because they always get created.
1019 void java_lang_Class::allocate_fixup_lists() {
1020 GrowableArray<Klass*>* mirror_list =
1021 new (mtClass) GrowableArray<Klass*>(40, mtClass);
1022 set_fixup_mirror_list(mirror_list);
1023
1024 GrowableArray<Klass*>* module_list =
1025 new (mtModule) GrowableArray<Klass*>(500, mtModule);
1026 set_fixup_module_field_list(module_list);
1027 }
1028
1029 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1030 Handle& mirror, Handle& comp_mirror, TRAPS) {
1031 // Allocate mirror (java.lang.Class instance)
1032 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1033 mirror = Handle(THREAD, mirror_oop);
1034
1035 // Setup indirection from mirror->klass
1036 set_klass(mirror(), k);
1037
1038 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1039 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1040
1041 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1042
1043 // It might also have a component mirror. This mirror must already exist.
1044 if (k->is_array_klass()) {
1045 if (k->is_typeArray_klass()) {
1046 BasicType type = TypeArrayKlass::cast(k)->element_type();
1047 if (is_scratch) {
1048 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1049 } else {
1050 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1051 }
1052 } else {
1053 assert(k->is_objArray_klass(), "Must be");
1054 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1055 assert(element_klass != nullptr, "Must have an element klass");
1056 if (is_scratch) {
1057 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1058 } else {
1059 comp_mirror = Handle(THREAD, element_klass->java_mirror());
1060 }
1061 }
1062 assert(comp_mirror() != nullptr, "must have a mirror");
1063
1064 // Two-way link between the array klass and its component mirror:
1065 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1066 set_component_mirror(mirror(), comp_mirror());
1067 // See below for ordering dependencies between field array_klass in component mirror
1068 // and java_mirror in this klass.
1069 } else {
1070 assert(k->is_instance_klass(), "Must be");
1071
1072 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1073 if (HAS_PENDING_EXCEPTION) {
1074 // If any of the fields throws an exception like OOM remove the klass field
1075 // from the mirror so GC doesn't follow it after the klass has been deallocated.
1076 // This mirror looks like a primitive type, which logically it is because it
1077 // it represents no class.
1078 set_klass(mirror(), nullptr);
1079 return;
1080 }
1081 }
1082 }
1083
1084 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1085 Handle module, Handle protection_domain,
1086 Handle classData, TRAPS) {
1087 assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1088 assert(k->java_mirror() == nullptr, "should only assign mirror once");
1089
1090 // Use this moment of initialization to cache modifier_flags also,
1091 // to support Class.getModifiers(). Instance classes recalculate
1092 // the cached flags after the class file is parsed, but before the
1093 // class is put into the system dictionary.
1094 int computed_modifiers = k->compute_modifier_flags();
1095 k->set_modifier_flags(computed_modifiers);
1096 // Class_klass has to be loaded because it is used to allocate
1097 // the mirror.
1098 if (vmClasses::Class_klass_loaded()) {
1099 Handle mirror;
1100 Handle comp_mirror;
1101
1102 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1103
1104 // set the classLoader field in the java_lang_Class instance
1105 assert(class_loader() == k->class_loader(), "should be same");
1106 set_class_loader(mirror(), class_loader());
1107
1108 // Setup indirection from klass->mirror
1109 // after any exceptions can happen during allocations.
1110 k->set_java_mirror(mirror);
1111
1112 // Set the module field in the java_lang_Class instance. This must be done
1113 // after the mirror is set.
1114 set_mirror_module_field(THREAD, k, mirror, module);
1115
1116 if (comp_mirror() != nullptr) {
1117 // Set after k->java_mirror() is published, because compiled code running
1118 // concurrently doesn't expect a k to have a null java_mirror.
1119 release_set_array_klass(comp_mirror(), k);
1120 }
1121 if (CDSConfig::is_dumping_heap()) {
1122 create_scratch_mirror(k, CHECK);
1123 }
1124 } else {
1125 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1126 fixup_mirror_list()->push(k);
1127 }
1128 }
1129
1130 #if INCLUDE_CDS_JAVA_HEAP
1131 // The "scratch mirror" stores the states of the mirror object that can be
1132 // decided at dump time (such as the initial values of the static fields, the
1133 // component mirror, etc). At runtime, more information is added to it by
1134 // java_lang_Class::restore_archived_mirror().
1135 //
1136 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1137 // produces the same result as /*runtime*/create_mirror().
1138 //
1139 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1140 // latter may contain dumptime-specific information that cannot be archived
1141 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1142 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1143 if (k->class_loader() != nullptr &&
1144 k->class_loader() != SystemDictionary::java_platform_loader() &&
1145 k->class_loader() != SystemDictionary::java_system_loader()) {
1146 // We only archive the mirrors of classes loaded by the built-in loaders
1147 return;
1148 }
1149
1150 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1151 Handle mirror;
1152 Handle comp_mirror;
1153 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1154
1155 if (comp_mirror() != nullptr) {
1156 release_set_array_klass(comp_mirror(), k);
1157 }
1158
1159 HeapShared::set_scratch_java_mirror(k, mirror());
1160 }
1161
1162 // Returns true if the mirror is updated, false if no archived mirror
1163 // data is present. After the archived mirror object is restored, the
1164 // shared klass' _has_raw_archived_mirror flag is cleared.
1165 bool java_lang_Class::restore_archived_mirror(Klass *k,
1166 Handle class_loader, Handle module,
1167 Handle protection_domain, TRAPS) {
1168 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1169 // see more details in vmClasses::resolve_all().
1170 if (!vmClasses::Class_klass_loaded()) {
1171 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1172 fixup_mirror_list()->push(k);
1173 return true;
1174 }
1175
1176 oop m = k->archived_java_mirror();
1177 assert(m != nullptr, "must have stored non-null archived mirror");
1178
1179 // Sanity: clear it now to prevent re-initialization if any of the following fails
1180 k->clear_archived_mirror_index();
1181
1182 // mirror is archived, restore
1183 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1184 assert(as_Klass(m) == k, "must be");
1185 Handle mirror(THREAD, m);
1186
1187 if (!k->is_array_klass()) {
1188 // - local static final fields with initial values were initialized at dump time
1189
1190 // create the init_lock
1191 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1192 set_init_lock(mirror(), r);
1193
1194 if (protection_domain.not_null()) {
1195 set_protection_domain(mirror(), protection_domain());
1196 }
1197 }
1198
1199 assert(class_loader() == k->class_loader(), "should be same");
1200 if (class_loader.not_null()) {
1201 set_class_loader(mirror(), class_loader());
1202 }
1203
1204 k->set_java_mirror(mirror);
1205
1206 set_mirror_module_field(THREAD, k, mirror, module);
1207
1208 if (log_is_enabled(Trace, cds, heap, mirror)) {
1209 ResourceMark rm(THREAD);
1210 log_trace(cds, heap, mirror)(
1211 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1212 }
1213
1214 return true;
1215 }
1216 #endif // INCLUDE_CDS_JAVA_HEAP
1217
1218 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1219 assert(_module_offset != 0, "must have been computed already");
1220 set_module(k->java_mirror(), module());
1221 }
1222
1223 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1224 assert(_oop_size_offset != 0, "must be set");
1225 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1226 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1227 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1228 }
1229
1230 int java_lang_Class::static_oop_field_count(oop java_class) {
1231 assert(_static_oop_field_count_offset != 0, "must be set");
1232 return java_class->int_field(_static_oop_field_count_offset);
1233 }
1234
1235 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1236 assert(_static_oop_field_count_offset != 0, "must be set");
1237 java_class->int_field_put(_static_oop_field_count_offset, size);
1238 }
1239
1240 oop java_lang_Class::protection_domain(oop java_class) {
1241 assert(_protection_domain_offset != 0, "must be set");
1242 return java_class->obj_field(_protection_domain_offset);
1243 }
1244 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1245 assert(_protection_domain_offset != 0, "must be set");
1246 java_class->obj_field_put(_protection_domain_offset, pd);
1247 }
1248
1249 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1250 assert(_component_mirror_offset != 0, "must be set");
1251 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1252 }
1253 oop java_lang_Class::component_mirror(oop java_class) {
1254 assert(_component_mirror_offset != 0, "must be set");
1255 return java_class->obj_field(_component_mirror_offset);
1256 }
1257
1258 oop java_lang_Class::init_lock(oop java_class) {
1259 assert(_init_lock_offset != 0, "must be set");
1260 return java_class->obj_field(_init_lock_offset);
1261 }
1262 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1263 assert(_init_lock_offset != 0, "must be set");
1264 java_class->obj_field_put(_init_lock_offset, init_lock);
1265 }
1266
1267 objArrayOop java_lang_Class::signers(oop java_class) {
1268 assert(_signers_offset != 0, "must be set");
1269 return (objArrayOop)java_class->obj_field(_signers_offset);
1270 }
1271
1272 oop java_lang_Class::class_data(oop java_class) {
1273 assert(_classData_offset != 0, "must be set");
1274 return java_class->obj_field(_classData_offset);
1275 }
1276 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1277 assert(_classData_offset != 0, "must be set");
1278 java_class->obj_field_put(_classData_offset, class_data);
1279 }
1280
1281 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1282 assert(_class_loader_offset != 0, "offsets should have been initialized");
1283 java_class->obj_field_put(_class_loader_offset, loader);
1284 }
1285
1286 oop java_lang_Class::class_loader(oop java_class) {
1287 assert(_class_loader_offset != 0, "must be set");
1288 return java_class->obj_field(_class_loader_offset);
1289 }
1290
1291 oop java_lang_Class::module(oop java_class) {
1292 assert(_module_offset != 0, "must be set");
1293 return java_class->obj_field(_module_offset);
1294 }
1295
1296 void java_lang_Class::set_module(oop java_class, oop module) {
1297 assert(_module_offset != 0, "must be set");
1298 java_class->obj_field_put(_module_offset, module);
1299 }
1300
1301 oop java_lang_Class::name(Handle java_class, TRAPS) {
1302 assert(_name_offset != 0, "must be set");
1303 oop o = java_class->obj_field(_name_offset);
1304 if (o == nullptr) {
1305 o = StringTable::intern(as_external_name(java_class()), THREAD);
1306 java_class->obj_field_put(_name_offset, o);
1307 }
1308 return o;
1309 }
1310
1311 oop java_lang_Class::source_file(oop java_class) {
1312 assert(_source_file_offset != 0, "must be set");
1313 return java_class->obj_field(_source_file_offset);
1314 }
1315
1316 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1317 assert(_source_file_offset != 0, "must be set");
1318 java_class->obj_field_put(_source_file_offset, source_file);
1319 }
1320
1321 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1322 // This should be improved by adding a field at the Java level or by
1323 // introducing a new VM klass (see comment in ClassFileParser)
1324 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1325 if (type != T_VOID) {
1326 Klass* aklass = Universe::typeArrayKlass(type);
1327 assert(aklass != nullptr, "correct bootstrap");
1328 release_set_array_klass(java_class, aklass);
1329 }
1330 #ifdef ASSERT
1331 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1332 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1333 #endif
1334 return java_class;
1335 }
1336
1337 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1338 assert(is_instance(java_class), "must be a Class object");
1339 java_class->metadata_field_put(_klass_offset, klass);
1340 }
1341
1342
1343 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1344 assert(is_instance(java_class), "must be a Class object");
1345 Symbol* name = nullptr;
1346 bool is_instance = false;
1347 if (is_primitive(java_class)) {
1348 name = vmSymbols::type_signature(primitive_type(java_class));
1349 } else {
1350 Klass* k = as_Klass(java_class);
1351 is_instance = k->is_instance_klass();
1352 name = k->name();
1353 }
1354 if (name == nullptr) {
1355 st->print("<null>");
1356 return;
1357 }
1358 if (is_instance) st->print("L");
1359 st->write((char*) name->base(), (int) name->utf8_length());
1360 if (is_instance) st->print(";");
1361 }
1362
1363 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1364 assert(is_instance(java_class), "must be a Class object");
1365 Symbol* name;
1366 if (is_primitive(java_class)) {
1367 name = vmSymbols::type_signature(primitive_type(java_class));
1368 // Because this can create a new symbol, the caller has to decrement
1369 // the refcount, so make adjustment here and below for symbols returned
1370 // that are not created or incremented due to a successful lookup.
1371 name->increment_refcount();
1372 } else {
1373 Klass* k = as_Klass(java_class);
1374 if (!k->is_instance_klass()) {
1375 name = k->name();
1376 name->increment_refcount();
1377 } else {
1378 ResourceMark rm;
1379 const char* sigstr = k->signature_name();
1380 int siglen = (int) strlen(sigstr);
1381 if (!intern_if_not_found) {
1382 name = SymbolTable::probe(sigstr, siglen);
1383 } else {
1384 name = SymbolTable::new_symbol(sigstr, siglen);
1385 }
1386 }
1387 }
1388 return name;
1389 }
1390
1391 // Returns the Java name for this Java mirror (Resource allocated)
1392 // See Klass::external_name().
1393 // For primitive type Java mirrors, its type name is returned.
1394 const char* java_lang_Class::as_external_name(oop java_class) {
1395 assert(is_instance(java_class), "must be a Class object");
1396 const char* name = nullptr;
1397 if (is_primitive(java_class)) {
1398 name = type2name(primitive_type(java_class));
1399 } else {
1400 name = as_Klass(java_class)->external_name();
1401 }
1402 if (name == nullptr) {
1403 name = "<null>";
1404 }
1405 return name;
1406 }
1407
1408 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1409 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1410 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1411 return k;
1412 }
1413
1414
1415 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1416 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1417 java_class->release_metadata_field_put(_array_klass_offset, klass);
1418 }
1419
1420
1421 BasicType java_lang_Class::primitive_type(oop java_class) {
1422 assert(is_primitive(java_class), "just checking");
1423 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1424 BasicType type = T_VOID;
1425 if (ak != nullptr) {
1426 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1427 type = ArrayKlass::cast(ak)->element_type();
1428 } else {
1429 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1430 }
1431 #ifdef ASSERT
1432 if (CDSConfig::is_dumping_heap()) {
1433 oop mirror = Universe::java_mirror(type);
1434 oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1435 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1436 } else {
1437 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1438 }
1439 #endif
1440 return type;
1441 }
1442
1443 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1444 assert(is_instance(java_class), "must be a Class object");
1445 if (is_primitive(java_class)) {
1446 if (reference_klass != nullptr)
1447 (*reference_klass) = nullptr;
1448 return primitive_type(java_class);
1449 } else {
1450 if (reference_klass != nullptr)
1451 (*reference_klass) = as_Klass(java_class);
1452 return T_OBJECT;
1453 }
1454 }
1455
1456
1457 oop java_lang_Class::primitive_mirror(BasicType t) {
1458 oop mirror = Universe::java_mirror(t);
1459 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1460 assert(is_primitive(mirror), "must be primitive");
1461 return mirror;
1462 }
1463
1464 #define CLASS_FIELDS_DO(macro) \
1465 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1466 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1467 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1468 macro(_module_offset, k, "module", module_signature, false); \
1469 macro(_name_offset, k, "name", string_signature, false); \
1470 macro(_classData_offset, k, "classData", object_signature, false); \
1471 macro(_signers_offset, k, "signers", object_array_signature, false);
1472
1473 void java_lang_Class::compute_offsets() {
1474 if (_offsets_computed) {
1475 return;
1476 }
1477
1478 _offsets_computed = true;
1479
1480 InstanceKlass* k = vmClasses::Class_klass();
1481 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1482 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1483 }
1484
1485 #if INCLUDE_CDS
1486 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1487 f->do_bool(&_offsets_computed);
1488
1489 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1490
1491 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1492 }
1493 #endif
1494
1495 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1496 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1497 return the_class_mirror->int_field(_classRedefinedCount_offset);
1498 }
1499
1500 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1501 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1502 the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1503 }
1504
1505
1506 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1507 // platform thread structure, and a eetop offset which was used for thread
1508 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1509 // merged, so in the HotSpot VM we just use the eetop field for the thread
1510 // instead of the privateInfo_offset.
1511 //
1512 // Note: The stackSize field is only present starting in 1.4.
1513
1514 int java_lang_Thread_FieldHolder::_group_offset;
1515 int java_lang_Thread_FieldHolder::_priority_offset;
1516 int java_lang_Thread_FieldHolder::_stackSize_offset;
1517 int java_lang_Thread_FieldHolder::_daemon_offset;
1518 int java_lang_Thread_FieldHolder::_thread_status_offset;
1519
1520 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1521 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1522 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1523 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1524 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1525 macro(_thread_status_offset, k, "threadStatus", int_signature, false)
1526
1527 void java_lang_Thread_FieldHolder::compute_offsets() {
1528 assert(_group_offset == 0, "offsets should be initialized only once");
1529
1530 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1531 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1532 }
1533
1534 #if INCLUDE_CDS
1535 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1536 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1537 }
1538 #endif
1539
1540 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1541 return holder->obj_field(_group_offset);
1542 }
1543
1544 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1545 return (ThreadPriority)holder->int_field(_priority_offset);
1546 }
1547
1548 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1549 holder->int_field_put(_priority_offset, priority);
1550 }
1551
1552 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1553 return holder->long_field(_stackSize_offset);
1554 }
1555
1556 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1557 return holder->bool_field(_daemon_offset) != 0;
1558 }
1559
1560 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1561 assert(val, "daemon status is never turned off");
1562 holder->bool_field_put(_daemon_offset, val);
1563 }
1564
1565 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1566 holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1567 }
1568
1569 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1570 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1571 }
1572
1573
1574 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1575
1576 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1577 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true);
1578
1579 void java_lang_Thread_Constants::compute_offsets() {
1580 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1581
1582 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1583 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1584 }
1585
1586 #if INCLUDE_CDS
1587 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1588 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1589 }
1590 #endif
1591
1592 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1593 InstanceKlass* k = vmClasses::Thread_Constants_klass();
1594 oop base = k->static_field_base_raw();
1595 return base->obj_field(_static_VTHREAD_GROUP_offset);
1596 }
1597
1598
1599 int java_lang_Thread::_holder_offset;
1600 int java_lang_Thread::_name_offset;
1601 int java_lang_Thread::_contextClassLoader_offset;
1602 int java_lang_Thread::_inheritedAccessControlContext_offset;
1603 int java_lang_Thread::_eetop_offset;
1604 int java_lang_Thread::_jvmti_thread_state_offset;
1605 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1606 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1607 int java_lang_Thread::_interrupted_offset;
1608 int java_lang_Thread::_interruptLock_offset;
1609 int java_lang_Thread::_tid_offset;
1610 int java_lang_Thread::_continuation_offset;
1611 int java_lang_Thread::_park_blocker_offset;
1612 int java_lang_Thread::_scopedValueBindings_offset;
1613 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1614
1615 #define THREAD_FIELDS_DO(macro) \
1616 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \
1617 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1618 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1619 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1620 macro(_eetop_offset, k, "eetop", long_signature, false); \
1621 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1622 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1623 macro(_tid_offset, k, "tid", long_signature, false); \
1624 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1625 macro(_continuation_offset, k, "cont", continuation_signature, false); \
1626 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1627
1628 void java_lang_Thread::compute_offsets() {
1629 assert(_holder_offset == 0, "offsets should be initialized only once");
1630
1631 InstanceKlass* k = vmClasses::Thread_klass();
1632 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1633 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1634 }
1635
1636 #if INCLUDE_CDS
1637 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1638 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1639 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1640 }
1641 #endif
1642
1643 JavaThread* java_lang_Thread::thread(oop java_thread) {
1644 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1645 }
1646
1647 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1648 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1649 }
1650
1651 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1652 java_thread->address_field_put(_eetop_offset, (address)thread);
1653 }
1654
1655 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1656 java_thread->release_address_field_put(_eetop_offset, (address)thread);
1657 }
1658
1659 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1660 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1661 }
1662
1663 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1664 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1665 }
1666
1667 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1668 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1669 }
1670
1671 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1672 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1673 int val = VTMS_transition_disable_count(java_thread);
1674 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1675 }
1676
1677 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1678 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1679 int val = VTMS_transition_disable_count(java_thread);
1680 assert(val > 0, "VTMS_transition_disable_count should never be negative");
1681 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1682 }
1683
1684 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1685 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1686 }
1687
1688 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1689 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1690 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1691 }
1692
1693 int java_lang_Thread::is_in_VTMS_transition_offset() {
1694 return _jvmti_is_in_VTMS_transition_offset;
1695 }
1696
1697 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1698 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1699 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1700 }
1701
1702 oop java_lang_Thread::holder(oop java_thread) {
1703 // Note: may return null if the thread is still attaching
1704 return java_thread->obj_field(_holder_offset);
1705 }
1706 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1707 return java_thread->obj_field(_interruptLock_offset);
1708 }
1709
1710 bool java_lang_Thread::interrupted(oop java_thread) {
1711 // Make sure the caller can safely access oops.
1712 assert(Thread::current()->is_VM_thread() ||
1713 (JavaThread::current()->thread_state() != _thread_blocked &&
1714 JavaThread::current()->thread_state() != _thread_in_native),
1715 "Unsafe access to oop");
1716 return java_thread->bool_field_volatile(_interrupted_offset);
1717 }
1718
1719 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1720 // Make sure the caller can safely access oops.
1721 assert(Thread::current()->is_VM_thread() ||
1722 (JavaThread::current()->thread_state() != _thread_blocked &&
1723 JavaThread::current()->thread_state() != _thread_in_native),
1724 "Unsafe access to oop");
1725 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1726 }
1727
1728
1729 oop java_lang_Thread::name(oop java_thread) {
1730 return java_thread->obj_field(_name_offset);
1731 }
1732
1733
1734 void java_lang_Thread::set_name(oop java_thread, oop name) {
1735 java_thread->obj_field_put(_name_offset, name);
1736 }
1737
1738 // Convenience macros for setting and getting Thread fields that
1739 // are actually stored in the FieldHolder object of the thread.
1740 // The FieldHolder can be null whilst a thread is attaching via
1741 // JNI, and when the main thread is attaching.
1742
1743 // The default value should be the default/zero initialized value
1744 // of the field as it would be in java.lang.Thread.FieldHolder.
1745 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1746 { \
1747 oop holder = java_lang_Thread::holder(java_thread); \
1748 if (holder != nullptr) \
1749 return java_lang_Thread_FieldHolder::field(holder); \
1750 else \
1751 return default_val; \
1752 }
1753
1754 // We should never be trying to set a field of an attaching thread.
1755 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1756 { \
1757 oop holder = java_lang_Thread::holder(java_thread); \
1758 assert(holder != nullptr, "Thread not fully initialized"); \
1759 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1760 }
1761
1762
1763 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1764 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1765 }
1766
1767
1768 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1769 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1770 }
1771
1772
1773 oop java_lang_Thread::threadGroup(oop java_thread) {
1774 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1775 }
1776
1777
1778 bool java_lang_Thread::is_alive(oop java_thread) {
1779 JavaThread* thr = java_lang_Thread::thread(java_thread);
1780 return (thr != nullptr);
1781 }
1782
1783
1784 bool java_lang_Thread::is_daemon(oop java_thread) {
1785 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1786 }
1787
1788
1789 void java_lang_Thread::set_daemon(oop java_thread) {
1790 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1791 }
1792
1793 oop java_lang_Thread::context_class_loader(oop java_thread) {
1794 return java_thread->obj_field(_contextClassLoader_offset);
1795 }
1796
1797 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1798 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1799 }
1800
1801
1802 jlong java_lang_Thread::stackSize(oop java_thread) {
1803 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1804 }
1805
1806 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1807 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1808 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1809 }
1810
1811 // Read thread status value from threadStatus field in java.lang.Thread java class.
1812 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1813 // Make sure the caller is operating on behalf of the VM or is
1814 // running VM code (state == _thread_in_vm).
1815 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1816 JavaThread::current()->thread_state() == _thread_in_vm,
1817 "Java Thread is not running in vm");
1818 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1819 }
1820
1821 ByteSize java_lang_Thread::thread_id_offset() {
1822 return in_ByteSize(_tid_offset);
1823 }
1824
1825 oop java_lang_Thread::park_blocker(oop java_thread) {
1826 return java_thread->obj_field(_park_blocker_offset);
1827 }
1828
1829 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1830 ThreadsListHandle tlh(JavaThread::current());
1831 JavaThread* thread;
1832 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1833 if (is_virtual) {
1834 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1835 if (carrier_thread == nullptr) {
1836 return nullptr;
1837 }
1838 thread = java_lang_Thread::thread(carrier_thread);
1839 } else {
1840 thread = java_lang_Thread::thread(java_thread);
1841 }
1842 if (thread == nullptr) {
1843 return nullptr;
1844 }
1845
1846 class GetStackTraceClosure : public HandshakeClosure {
1847 public:
1848 const Handle _java_thread;
1849 int _depth;
1850 bool _retry_handshake;
1851 GrowableArray<Method*>* _methods;
1852 GrowableArray<int>* _bcis;
1853
1854 GetStackTraceClosure(Handle java_thread) :
1855 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1856 _methods(nullptr), _bcis(nullptr) {
1857 }
1858 ~GetStackTraceClosure() {
1859 delete _methods;
1860 delete _bcis;
1861 }
1862
1863 bool read_reset_retry() {
1864 bool ret = _retry_handshake;
1865 // If we re-execute the handshake this method need to return false
1866 // when the handshake cannot be performed. (E.g. thread terminating)
1867 _retry_handshake = false;
1868 return ret;
1869 }
1870
1871 void do_thread(Thread* th) {
1872 if (!Thread::current()->is_Java_thread()) {
1873 _retry_handshake = true;
1874 return;
1875 }
1876
1877 JavaThread* thread = JavaThread::cast(th);
1878
1879 if (!thread->has_last_Java_frame()) {
1880 return;
1881 }
1882
1883 bool carrier = false;
1884 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1885 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1886 const ContinuationEntry* ce = thread->vthread_continuation();
1887 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1888 return; // not mounted
1889 }
1890 } else {
1891 carrier = (thread->vthread_continuation() != nullptr);
1892 }
1893
1894 const int max_depth = MaxJavaStackTraceDepth;
1895 const bool skip_hidden = !ShowHiddenFrames;
1896
1897 // Pick minimum length that will cover most cases
1898 int init_length = 64;
1899 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1900 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1901
1902 int total_count = 0;
1903 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1904 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1905 vfst.next()) {
1906
1907 if (skip_hidden && (vfst.method()->is_hidden() ||
1908 vfst.method()->is_continuation_enter_intrinsic())) {
1909 continue;
1910 }
1911
1912 _methods->push(vfst.method());
1913 _bcis->push(vfst.bci());
1914 total_count++;
1915 }
1916
1917 _depth = total_count;
1918 }
1919 };
1920
1921 // Handshake with target
1922 ResourceMark rm(THREAD);
1923 HandleMark hm(THREAD);
1924 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1925 do {
1926 Handshake::execute(&gstc, &tlh, thread);
1927 } while (gstc.read_reset_retry());
1928
1929 // Stop if no stack trace is found.
1930 if (gstc._depth == 0) {
1931 return nullptr;
1932 }
1933
1934 // Convert to StackTraceElement array
1935 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1936 assert(k != nullptr, "must be loaded in 1.4+");
1937 if (k->should_be_initialized()) {
1938 k->initialize(CHECK_NULL);
1939 }
1940 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1941
1942 for (int i = 0; i < gstc._depth; i++) {
1943 methodHandle method(THREAD, gstc._methods->at(i));
1944 oop element = java_lang_StackTraceElement::create(method,
1945 gstc._bcis->at(i),
1946 CHECK_NULL);
1947 trace->obj_at_put(i, element);
1948 }
1949
1950 return trace();
1951 }
1952
1953 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1954 JavaThreadStatus status = get_thread_status(java_thread);
1955 switch (status) {
1956 case JavaThreadStatus::NEW : return "NEW";
1957 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
1958 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
1959 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1960 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1961 case JavaThreadStatus::PARKED : return "WAITING (parking)";
1962 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
1963 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1964 case JavaThreadStatus::TERMINATED : return "TERMINATED";
1965 default : return "UNKNOWN";
1966 };
1967 }
1968 int java_lang_ThreadGroup::_parent_offset;
1969 int java_lang_ThreadGroup::_name_offset;
1970 int java_lang_ThreadGroup::_maxPriority_offset;
1971 int java_lang_ThreadGroup::_daemon_offset;
1972
1973 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1974 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1975 return java_thread_group->obj_field(_parent_offset);
1976 }
1977
1978 // ("name as oop" accessor is not necessary)
1979
1980 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1981 oop name = java_thread_group->obj_field(_name_offset);
1982 // ThreadGroup.name can be null
1983 if (name != nullptr) {
1984 return java_lang_String::as_utf8_string(name);
1985 }
1986 return nullptr;
1987 }
1988
1989 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1990 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1991 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1992 }
1993
1994 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1995 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1996 return java_thread_group->bool_field(_daemon_offset) != 0;
1997 }
1998
1999 #define THREADGROUP_FIELDS_DO(macro) \
2000 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2001 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2002 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2003 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2004
2005 void java_lang_ThreadGroup::compute_offsets() {
2006 assert(_parent_offset == 0, "offsets should be initialized only once");
2007
2008 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2009 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2010 }
2011
2012 #if INCLUDE_CDS
2013 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2014 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2015 }
2016 #endif
2017
2018
2019 // java_lang_VirtualThread
2020
2021 int java_lang_VirtualThread::static_vthread_scope_offset;
2022 int java_lang_VirtualThread::_carrierThread_offset;
2023 int java_lang_VirtualThread::_continuation_offset;
2024 int java_lang_VirtualThread::_state_offset;
2025 int java_lang_VirtualThread::_next_offset;
2026 int java_lang_VirtualThread::_onWaitingList_offset;
2027 int java_lang_VirtualThread::_notified_offset;
2028 int java_lang_VirtualThread::_waitTimeout_offset;
2029
2030 #define VTHREAD_FIELDS_DO(macro) \
2031 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2032 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2033 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2034 macro(_state_offset, k, "state", int_signature, false); \
2035 macro(_next_offset, k, "next", vthread_signature, false); \
2036 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \
2037 macro(_notified_offset, k, "notified", bool_signature, false); \
2038 macro(_waitTimeout_offset, k, "waitTimeout", long_signature, false);
2039
2040
2041 void java_lang_VirtualThread::compute_offsets() {
2042 InstanceKlass* k = vmClasses::VirtualThread_klass();
2043 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2044 }
2045
2046 bool java_lang_VirtualThread::is_instance(oop obj) {
2047 return obj != nullptr && is_subclass(obj->klass());
2048 }
2049
2050 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2051 oop thread = vthread->obj_field(_carrierThread_offset);
2052 return thread;
2053 }
2054
2055 oop java_lang_VirtualThread::continuation(oop vthread) {
2056 oop cont = vthread->obj_field(_continuation_offset);
2057 return cont;
2058 }
2059
2060 int java_lang_VirtualThread::state(oop vthread) {
2061 return vthread->int_field_acquire(_state_offset);
2062 }
2063
2064 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2065 vthread->release_int_field_put(_state_offset, state);
2066 }
2067
2068 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2069 jint* addr = vthread->field_addr<jint>(_state_offset);
2070 int res = Atomic::cmpxchg(addr, old_state, new_state);
2071 return res;
2072 }
2073
2074 oop java_lang_VirtualThread::next(oop vthread) {
2075 return vthread->obj_field(_next_offset);
2076 }
2077
2078 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2079 vthread->obj_field_put(_next_offset, next_vthread);
2080 }
2081
2082 // Add vthread to the waiting list if it's not already in it. Multiple threads
2083 // could be trying to add vthread to the list at the same time, so we control
2084 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2085 // Method returns true if we added vthread to the list, false otherwise.
2086 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2087 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2088 jboolean vthread_on_list = Atomic::load(addr);
2089 if (!vthread_on_list) {
2090 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2091 if (!vthread_on_list) {
2092 for (;;) {
2093 oop head = list_head.resolve();
2094 java_lang_VirtualThread::set_next(vthread, head);
2095 if (list_head.cmpxchg(head, vthread) == head) return true;
2096 }
2097 }
2098 }
2099 return false; // already on waiting list
2100 }
2101
2102 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2103 vthread->bool_field_put_volatile(_notified_offset, value);
2104 }
2105
2106 jlong java_lang_VirtualThread::waitTimeout(oop vthread) {
2107 return vthread->long_field(_waitTimeout_offset);
2108 }
2109
2110 void java_lang_VirtualThread::set_waitTimeout(oop vthread, jlong value) {
2111 vthread->long_field_put(_waitTimeout_offset, value);
2112 }
2113
2114 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2115 JavaThreadStatus status = JavaThreadStatus::NEW;
2116 switch (state & ~SUSPENDED) {
2117 case NEW:
2118 status = JavaThreadStatus::NEW;
2119 break;
2120 case STARTED:
2121 case RUNNING:
2122 case PARKING:
2123 case TIMED_PARKING:
2124 case UNPARKED:
2125 case YIELDING:
2126 case YIELDED:
2127 case UNBLOCKED:
2128 case WAITING:
2129 case TIMED_WAITING:
2130 status = JavaThreadStatus::RUNNABLE;
2131 break;
2132 case PARKED:
2133 case PINNED:
2134 status = JavaThreadStatus::PARKED;
2135 break;
2136 case TIMED_PARKED:
2137 case TIMED_PINNED:
2138 status = JavaThreadStatus::PARKED_TIMED;
2139 break;
2140 case BLOCKING:
2141 case BLOCKED:
2142 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2143 break;
2144 case WAIT:
2145 status = JavaThreadStatus::IN_OBJECT_WAIT;
2146 break;
2147 case TIMED_WAIT:
2148 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2149 break;
2150 case TERMINATED:
2151 status = JavaThreadStatus::TERMINATED;
2152 break;
2153 default:
2154 ShouldNotReachHere();
2155 }
2156 return status;
2157 }
2158
2159 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2160 oop continuation = java_lang_VirtualThread::continuation(vthread);
2161 assert(continuation != nullptr, "vthread with no continuation");
2162 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2163 return chunk != nullptr && chunk->preempted();
2164 }
2165
2166 #if INCLUDE_CDS
2167 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2168 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2169 }
2170 #endif
2171
2172 // java_lang_Throwable
2173
2174 int java_lang_Throwable::_backtrace_offset;
2175 int java_lang_Throwable::_detailMessage_offset;
2176 int java_lang_Throwable::_stackTrace_offset;
2177 int java_lang_Throwable::_depth_offset;
2178 int java_lang_Throwable::_cause_offset;
2179 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2180
2181 #define THROWABLE_FIELDS_DO(macro) \
2182 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2183 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2184 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2185 macro(_depth_offset, k, "depth", int_signature, false); \
2186 macro(_cause_offset, k, "cause", throwable_signature, false); \
2187 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2188
2189 void java_lang_Throwable::compute_offsets() {
2190 InstanceKlass* k = vmClasses::Throwable_klass();
2191 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2192 }
2193
2194 #if INCLUDE_CDS
2195 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2196 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2197 }
2198 #endif
2199
2200 oop java_lang_Throwable::unassigned_stacktrace() {
2201 InstanceKlass* ik = vmClasses::Throwable_klass();
2202 oop base = ik->static_field_base_raw();
2203 return base->obj_field(_static_unassigned_stacktrace_offset);
2204 }
2205
2206 oop java_lang_Throwable::backtrace(oop throwable) {
2207 return throwable->obj_field_acquire(_backtrace_offset);
2208 }
2209
2210
2211 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2212 throwable->release_obj_field_put(_backtrace_offset, value);
2213 }
2214
2215 int java_lang_Throwable::depth(oop throwable) {
2216 return throwable->int_field(_depth_offset);
2217 }
2218
2219 void java_lang_Throwable::set_depth(oop throwable, int value) {
2220 throwable->int_field_put(_depth_offset, value);
2221 }
2222
2223 oop java_lang_Throwable::message(oop throwable) {
2224 return throwable->obj_field(_detailMessage_offset);
2225 }
2226
2227 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2228 oop msg = java_lang_Throwable::message(throwable);
2229 const char* msg_utf8 = nullptr;
2230 if (msg != nullptr) {
2231 msg_utf8 = java_lang_String::as_utf8_string(msg);
2232 }
2233 return msg_utf8;
2234 }
2235
2236 oop java_lang_Throwable::cause(oop throwable) {
2237 return throwable->obj_field(_cause_offset);
2238 }
2239
2240 void java_lang_Throwable::set_message(oop throwable, oop value) {
2241 throwable->obj_field_put(_detailMessage_offset, value);
2242 }
2243
2244
2245 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2246 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2247 }
2248
2249 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2250 set_stacktrace(throwable, nullptr);
2251 }
2252
2253
2254 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2255 ResourceMark rm;
2256 Klass* k = throwable->klass();
2257 assert(k != nullptr, "just checking");
2258 st->print("%s", k->external_name());
2259 oop msg = message(throwable);
2260 if (msg != nullptr) {
2261 st->print(": %s", java_lang_String::as_utf8_string(msg));
2262 }
2263 }
2264
2265 // After this many redefines, the stack trace is unreliable.
2266 const int MAX_VERSION = USHRT_MAX;
2267
2268 static inline bool version_matches(Method* method, int version) {
2269 assert(version < MAX_VERSION, "version is too big");
2270 return method != nullptr && (method->constants()->version() == version);
2271 }
2272
2273 // This class provides a simple wrapper over the internal structure of
2274 // exception backtrace to insulate users of the backtrace from needing
2275 // to know what it looks like.
2276 // The code of this class is not GC safe. Allocations can only happen
2277 // in expand().
2278 class BacktraceBuilder: public StackObj {
2279 friend class BacktraceIterator;
2280 private:
2281 Handle _backtrace;
2282 objArrayOop _head;
2283 typeArrayOop _methods;
2284 typeArrayOop _bcis;
2285 objArrayOop _mirrors;
2286 typeArrayOop _names; // Needed to insulate method name against redefinition.
2287 // True if the top frame of the backtrace is omitted because it shall be hidden.
2288 bool _has_hidden_top_frame;
2289 int _index;
2290 NoSafepointVerifier _nsv;
2291
2292 enum {
2293 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2294 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2295 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2296 trace_names_offset = java_lang_Throwable::trace_names_offset,
2297 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2298 trace_next_offset = java_lang_Throwable::trace_next_offset,
2299 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2300 trace_size = java_lang_Throwable::trace_size,
2301 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2302 };
2303
2304 // get info out of chunks
2305 static typeArrayOop get_methods(objArrayHandle chunk) {
2306 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2307 assert(methods != nullptr, "method array should be initialized in backtrace");
2308 return methods;
2309 }
2310 static typeArrayOop get_bcis(objArrayHandle chunk) {
2311 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2312 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2313 return bcis;
2314 }
2315 static objArrayOop get_mirrors(objArrayHandle chunk) {
2316 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2317 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2318 return mirrors;
2319 }
2320 static typeArrayOop get_names(objArrayHandle chunk) {
2321 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2322 assert(names != nullptr, "names array should be initialized in backtrace");
2323 return names;
2324 }
2325 static bool has_hidden_top_frame(objArrayHandle chunk) {
2326 oop hidden = chunk->obj_at(trace_hidden_offset);
2327 return hidden != nullptr;
2328 }
2329
2330 public:
2331
2332 // constructor for new backtrace
2333 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2334 expand(CHECK);
2335 _backtrace = Handle(THREAD, _head);
2336 _index = 0;
2337 }
2338
2339 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2340 _methods = get_methods(backtrace);
2341 _bcis = get_bcis(backtrace);
2342 _mirrors = get_mirrors(backtrace);
2343 _names = get_names(backtrace);
2344 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2345 assert(_methods->length() == _bcis->length() &&
2346 _methods->length() == _mirrors->length() &&
2347 _mirrors->length() == _names->length(),
2348 "method and source information arrays should match");
2349
2350 // head is the preallocated backtrace
2351 _head = backtrace();
2352 _backtrace = Handle(thread, _head);
2353 _index = 0;
2354 }
2355
2356 void expand(TRAPS) {
2357 objArrayHandle old_head(THREAD, _head);
2358 PauseNoSafepointVerifier pnsv(&_nsv);
2359
2360 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2361 objArrayHandle new_head(THREAD, head);
2362
2363 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2364 typeArrayHandle new_methods(THREAD, methods);
2365
2366 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2367 typeArrayHandle new_bcis(THREAD, bcis);
2368
2369 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2370 objArrayHandle new_mirrors(THREAD, mirrors);
2371
2372 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2373 typeArrayHandle new_names(THREAD, names);
2374
2375 if (!old_head.is_null()) {
2376 old_head->obj_at_put(trace_next_offset, new_head());
2377 }
2378 new_head->obj_at_put(trace_methods_offset, new_methods());
2379 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2380 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2381 new_head->obj_at_put(trace_names_offset, new_names());
2382 new_head->obj_at_put(trace_hidden_offset, nullptr);
2383
2384 _head = new_head();
2385 _methods = new_methods();
2386 _bcis = new_bcis();
2387 _mirrors = new_mirrors();
2388 _names = new_names();
2389 _index = 0;
2390 }
2391
2392 oop backtrace() {
2393 return _backtrace();
2394 }
2395
2396 inline void push(Method* method, int bci, TRAPS) {
2397 // Smear the -1 bci to 0 since the array only holds unsigned
2398 // shorts. The later line number lookup would just smear the -1
2399 // to a 0 even if it could be recorded.
2400 if (bci == SynchronizationEntryBCI) bci = 0;
2401
2402 if (_index >= trace_chunk_size) {
2403 methodHandle mhandle(THREAD, method);
2404 expand(CHECK);
2405 method = mhandle();
2406 }
2407
2408 _methods->ushort_at_put(_index, method->orig_method_idnum());
2409 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2410
2411 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2412 // klass owning the symbols alive so their refcounts aren't decremented.
2413 Symbol* name = method->name();
2414 _names->symbol_at_put(_index, name);
2415
2416 // We need to save the mirrors in the backtrace to keep the class
2417 // from being unloaded while we still have this stack trace.
2418 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2419 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2420
2421 _index++;
2422 }
2423
2424 void set_has_hidden_top_frame() {
2425 if (!_has_hidden_top_frame) {
2426 // It would be nice to add java/lang/Boolean::TRUE here
2427 // to indicate that this backtrace has a hidden top frame.
2428 // But this code is used before TRUE is allocated.
2429 // Therefore let's just use an arbitrary legal oop
2430 // available right here. _methods is a short[].
2431 assert(_methods != nullptr, "we need a legal oop");
2432 _has_hidden_top_frame = true;
2433 _head->obj_at_put(trace_hidden_offset, _methods);
2434 }
2435 }
2436 };
2437
2438 struct BacktraceElement : public StackObj {
2439 int _method_id;
2440 int _bci;
2441 int _version;
2442 Symbol* _name;
2443 Handle _mirror;
2444 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2445 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2446 };
2447
2448 class BacktraceIterator : public StackObj {
2449 int _index;
2450 objArrayHandle _result;
2451 objArrayHandle _mirrors;
2452 typeArrayHandle _methods;
2453 typeArrayHandle _bcis;
2454 typeArrayHandle _names;
2455
2456 void init(objArrayHandle result, Thread* thread) {
2457 // Get method id, bci, version and mirror from chunk
2458 _result = result;
2459 if (_result.not_null()) {
2460 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2461 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2462 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2463 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2464 _index = 0;
2465 }
2466 }
2467 public:
2468 BacktraceIterator(objArrayHandle result, Thread* thread) {
2469 init(result, thread);
2470 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2471 }
2472
2473 BacktraceElement next(Thread* thread) {
2474 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2475 _methods->ushort_at(_index),
2476 Backtrace::version_at(_bcis->int_at(_index)),
2477 Backtrace::bci_at(_bcis->int_at(_index)),
2478 _names->symbol_at(_index));
2479 _index++;
2480
2481 if (_index >= java_lang_Throwable::trace_chunk_size) {
2482 int next_offset = java_lang_Throwable::trace_next_offset;
2483 // Get next chunk
2484 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2485 init(result, thread);
2486 }
2487 return e;
2488 }
2489
2490 bool repeat() {
2491 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2492 }
2493 };
2494
2495
2496 // Print stack trace element to resource allocated buffer
2497 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2498 int version, int bci, Symbol* name) {
2499 ResourceMark rm;
2500
2501 // Get strings and string lengths
2502 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2503 const char* klass_name = holder->external_name();
2504 int buf_len = (int)strlen(klass_name);
2505
2506 char* method_name = name->as_C_string();
2507 buf_len += (int)strlen(method_name);
2508
2509 char* source_file_name = nullptr;
2510 Symbol* source = Backtrace::get_source_file_name(holder, version);
2511 if (source != nullptr) {
2512 source_file_name = source->as_C_string();
2513 buf_len += (int)strlen(source_file_name);
2514 }
2515
2516 char *module_name = nullptr, *module_version = nullptr;
2517 ModuleEntry* module = holder->module();
2518 if (module->is_named()) {
2519 module_name = module->name()->as_C_string();
2520 buf_len += (int)strlen(module_name);
2521 if (module->version() != nullptr) {
2522 module_version = module->version()->as_C_string();
2523 buf_len += (int)strlen(module_version);
2524 }
2525 }
2526
2527 // Allocate temporary buffer with extra space for formatting and line number
2528 const size_t buf_size = buf_len + 64;
2529 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2530
2531 // Print stack trace line in buffer
2532 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2533
2534 // Print module information
2535 if (module_name != nullptr) {
2536 if (module_version != nullptr) {
2537 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2538 } else {
2539 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2540 }
2541 }
2542
2543 // The method can be null if the requested class version is gone
2544 Method* method = holder->method_with_orig_idnum(method_id, version);
2545 if (!version_matches(method, version)) {
2546 strcat(buf, "Redefined)");
2547 } else {
2548 int line_number = Backtrace::get_line_number(method, bci);
2549 if (line_number == -2) {
2550 strcat(buf, "Native Method)");
2551 } else {
2552 if (source_file_name != nullptr && (line_number != -1)) {
2553 // Sourcename and linenumber
2554 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2555 } else if (source_file_name != nullptr) {
2556 // Just sourcename
2557 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2558 } else {
2559 // Neither sourcename nor linenumber
2560 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2561 }
2562 nmethod* nm = method->code();
2563 if (WizardMode && nm != nullptr) {
2564 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2565 }
2566 }
2567 }
2568
2569 st->print_cr("%s", buf);
2570 }
2571
2572 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2573 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2574 int method_id = method->orig_method_idnum();
2575 int version = method->constants()->version();
2576 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2577 }
2578
2579 /**
2580 * Print the throwable message and its stack trace plus all causes by walking the
2581 * cause chain. The output looks the same as of Throwable.printStackTrace().
2582 */
2583 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2584 // First, print the message.
2585 print(throwable(), st);
2586 st->cr();
2587
2588 // Now print the stack trace.
2589 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2590 while (throwable.not_null()) {
2591 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2592 if (result.is_null()) {
2593 st->print_raw_cr("\t<<no stack trace available>>");
2594 return;
2595 }
2596 BacktraceIterator iter(result, THREAD);
2597
2598 while (iter.repeat()) {
2599 BacktraceElement bte = iter.next(THREAD);
2600 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2601 }
2602 if (THREAD->can_call_java()) {
2603 // Call getCause() which doesn't necessarily return the _cause field.
2604 ExceptionMark em(THREAD);
2605 JavaValue cause(T_OBJECT);
2606 JavaCalls::call_virtual(&cause,
2607 throwable,
2608 throwable->klass(),
2609 vmSymbols::getCause_name(),
2610 vmSymbols::void_throwable_signature(),
2611 THREAD);
2612 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2613 if (HAS_PENDING_EXCEPTION) {
2614 CLEAR_PENDING_EXCEPTION;
2615 throwable = Handle();
2616 } else {
2617 throwable = Handle(THREAD, cause.get_oop());
2618 if (throwable.not_null()) {
2619 st->print("Caused by: ");
2620 print(throwable(), st);
2621 st->cr();
2622 }
2623 }
2624 } else {
2625 st->print_raw_cr("<<cannot call Java to get cause>>");
2626 return;
2627 }
2628 }
2629 }
2630
2631 /**
2632 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2633 */
2634 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2635 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2636 JavaValue result(T_VOID);
2637 JavaCalls::call_virtual(&result,
2638 throwable,
2639 vmClasses::Throwable_klass(),
2640 vmSymbols::printStackTrace_name(),
2641 vmSymbols::void_method_signature(),
2642 THREAD);
2643 }
2644
2645 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2646 if (!StackTraceInThrowable) return;
2647 ResourceMark rm(THREAD);
2648
2649 // Start out by clearing the backtrace for this object, in case the VM
2650 // runs out of memory while allocating the stack trace
2651 set_backtrace(throwable(), nullptr);
2652 // Clear lazily constructed Java level stacktrace if refilling occurs
2653 // This is unnecessary in 1.7+ but harmless
2654 clear_stacktrace(throwable());
2655
2656 int max_depth = MaxJavaStackTraceDepth;
2657 JavaThread* thread = THREAD;
2658
2659 BacktraceBuilder bt(CHECK);
2660
2661 // If there is no Java frame just return the method that was being called
2662 // with bci 0
2663 if (!thread->has_last_Java_frame()) {
2664 if (max_depth >= 1 && method() != nullptr) {
2665 bt.push(method(), 0, CHECK);
2666 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2667 set_depth(throwable(), 1);
2668 set_backtrace(throwable(), bt.backtrace());
2669 }
2670 return;
2671 }
2672
2673 // Instead of using vframe directly, this version of fill_in_stack_trace
2674 // basically handles everything by hand. This significantly improved the
2675 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2676 // See bug 6333838 for more details.
2677 // The "ASSERT" here is to verify this method generates the exactly same stack
2678 // trace as utilizing vframe.
2679 #ifdef ASSERT
2680 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2681 #endif
2682 int total_count = 0;
2683 RegisterMap map(thread,
2684 RegisterMap::UpdateMap::skip,
2685 RegisterMap::ProcessFrames::skip,
2686 RegisterMap::WalkContinuation::include);
2687 int decode_offset = 0;
2688 nmethod* nm = nullptr;
2689 bool skip_fillInStackTrace_check = false;
2690 bool skip_throwableInit_check = false;
2691 bool skip_hidden = !ShowHiddenFrames;
2692 bool show_carrier = ShowCarrierFrames;
2693 ContinuationEntry* cont_entry = thread->last_continuation();
2694 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2695 Method* method = nullptr;
2696 int bci = 0;
2697
2698 // Compiled java method case.
2699 if (decode_offset != 0) {
2700 DebugInfoReadStream stream(nm, decode_offset);
2701 decode_offset = stream.read_int();
2702 method = (Method*)nm->metadata_at(stream.read_int());
2703 bci = stream.read_bci();
2704 } else {
2705 if (fr.is_first_frame()) break;
2706
2707 if (Continuation::is_continuation_enterSpecial(fr)) {
2708 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2709 if (!show_carrier && cont_entry->is_virtual_thread()) {
2710 break;
2711 }
2712 cont_entry = cont_entry->parent();
2713 }
2714
2715 address pc = fr.pc();
2716 if (fr.is_interpreted_frame()) {
2717 address bcp;
2718 if (!map.in_cont()) {
2719 bcp = fr.interpreter_frame_bcp();
2720 method = fr.interpreter_frame_method();
2721 } else {
2722 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2723 method = map.stack_chunk()->interpreter_frame_method(fr);
2724 }
2725 bci = method->bci_from(bcp);
2726 fr = fr.sender(&map);
2727 } else {
2728 CodeBlob* cb = fr.cb();
2729 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2730 // but non nmethod
2731 fr = fr.sender(&map);
2732 if (cb == nullptr || !cb->is_nmethod()) {
2733 continue;
2734 }
2735 nm = cb->as_nmethod();
2736 assert(nm->method() != nullptr, "must be");
2737 if (nm->method()->is_native()) {
2738 method = nm->method();
2739 bci = 0;
2740 } else {
2741 PcDesc* pd = nm->pc_desc_at(pc);
2742 decode_offset = pd->scope_decode_offset();
2743 // if decode_offset is not equal to 0, it will execute the
2744 // "compiled java method case" at the beginning of the loop.
2745 continue;
2746 }
2747 }
2748 }
2749 #ifdef ASSERT
2750 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2751 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2752 st.next();
2753 }
2754 #endif
2755
2756 // the format of the stacktrace will be:
2757 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2758 // - 0 or more <init> methods for the exception class (skipped)
2759 // - rest of the stack
2760
2761 if (!skip_fillInStackTrace_check) {
2762 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2763 throwable->is_a(method->method_holder())) {
2764 continue;
2765 }
2766 else {
2767 skip_fillInStackTrace_check = true; // gone past them all
2768 }
2769 }
2770 if (!skip_throwableInit_check) {
2771 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2772
2773 // skip <init> methods of the exception class and superclasses
2774 // This is similar to classic VM.
2775 if (method->name() == vmSymbols::object_initializer_name() &&
2776 throwable->is_a(method->method_holder())) {
2777 continue;
2778 } else {
2779 // there are none or we've seen them all - either way stop checking
2780 skip_throwableInit_check = true;
2781 }
2782 }
2783 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2784 if (skip_hidden) {
2785 if (total_count == 0) {
2786 // The top frame will be hidden from the stack trace.
2787 bt.set_has_hidden_top_frame();
2788 }
2789 continue;
2790 }
2791 }
2792
2793 bt.push(method, bci, CHECK);
2794 total_count++;
2795 }
2796
2797 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2798
2799 // Put completed stack trace into throwable object
2800 set_backtrace(throwable(), bt.backtrace());
2801 set_depth(throwable(), total_count);
2802 }
2803
2804 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2805 // No-op if stack trace is disabled
2806 if (!StackTraceInThrowable) {
2807 return;
2808 }
2809
2810 // Disable stack traces for some preallocated out of memory errors
2811 if (!Universe::should_fill_in_stack_trace(throwable)) {
2812 return;
2813 }
2814
2815 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2816 PreserveExceptionMark pm(THREAD);
2817
2818 fill_in_stack_trace(throwable, method, THREAD);
2819 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2820 // original exception via the PreserveExceptionMark destructor.
2821 CLEAR_PENDING_EXCEPTION;
2822 }
2823
2824 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2825 // Allocate stack trace - backtrace is created but not filled in
2826
2827 // No-op if stack trace is disabled
2828 if (!StackTraceInThrowable) return;
2829 BacktraceBuilder bt(CHECK); // creates a backtrace
2830 set_backtrace(throwable(), bt.backtrace());
2831 }
2832
2833
2834 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2835 // Fill in stack trace into preallocated backtrace (no GC)
2836
2837 // No-op if stack trace is disabled
2838 if (!StackTraceInThrowable) return;
2839
2840 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2841
2842 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2843
2844 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2845 assert(backtrace.not_null(), "backtrace should have been preallocated");
2846
2847 ResourceMark rm(THREAD);
2848 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2849
2850 BacktraceBuilder bt(THREAD, backtrace);
2851
2852 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2853 // methods as preallocated errors aren't created by "java" code.
2854
2855 // fill in as much stack trace as possible
2856 int chunk_count = 0;
2857 for (;!st.at_end(); st.next()) {
2858 bt.push(st.method(), st.bci(), CHECK);
2859 chunk_count++;
2860
2861 // Bail-out for deep stacks
2862 if (chunk_count >= trace_chunk_size) break;
2863 }
2864 set_depth(throwable(), chunk_count);
2865 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2866
2867 // We support the Throwable immutability protocol defined for Java 7.
2868 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2869 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2870 }
2871
2872 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2873 objArrayHandle stack_trace_array_h, TRAPS) {
2874
2875 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2876 THROW(vmSymbols::java_lang_NullPointerException());
2877 }
2878
2879 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2880
2881 if (stack_trace_array_h->length() != depth) {
2882 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2883 }
2884
2885 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2886 BacktraceIterator iter(result, THREAD);
2887
2888 int index = 0;
2889 while (iter.repeat()) {
2890 BacktraceElement bte = iter.next(THREAD);
2891
2892 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2893
2894 if (stack_trace_element.is_null()) {
2895 THROW(vmSymbols::java_lang_NullPointerException());
2896 }
2897
2898 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2899 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2900
2901 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2902 method,
2903 bte._version,
2904 bte._bci,
2905 bte._name,
2906 CHECK);
2907 }
2908 }
2909
2910 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2911 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2912 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2913 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2914 // symbolic stacktrace of 'throwable'.
2915 assert(throwable.not_null(), "shouldn't be");
2916
2917 // Now create the message from the original exception and thread name.
2918 ResourceMark rm(current);
2919 const char *message = nullptr;
2920 oop detailed_message = java_lang_Throwable::message(throwable());
2921 if (detailed_message != nullptr) {
2922 message = java_lang_String::as_utf8_string(detailed_message);
2923 }
2924 stringStream st;
2925 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2926 message == nullptr ? "" : ":");
2927 if (message == nullptr) {
2928 st.print("[in thread \"%s\"]", current->name());
2929 } else {
2930 st.print("%s [in thread \"%s\"]", message, current->name());
2931 }
2932
2933 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2934 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2935 // If new_exception returns a different exception while creating the exception,
2936 // abandon the attempt to save the initialization error and return null.
2937 if (init_error->klass()->name() != exception_name) {
2938 log_info(class, init)("Exception %s thrown while saving initialization exception",
2939 init_error->klass()->external_name());
2940 return Handle();
2941 }
2942
2943 // Call to java to fill in the stack trace and clear declaringClassObject to
2944 // not keep classes alive in the stack trace.
2945 // call this: public StackTraceElement[] getStackTrace()
2946 JavaValue result(T_ARRAY);
2947 JavaCalls::call_virtual(&result, throwable,
2948 vmClasses::Throwable_klass(),
2949 vmSymbols::getStackTrace_name(),
2950 vmSymbols::getStackTrace_signature(),
2951 current);
2952 if (!current->has_pending_exception()){
2953 Handle stack_trace(current, result.get_oop());
2954 assert(stack_trace->is_objArray(), "Should be an array");
2955 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2956 // Clear backtrace because the stacktrace should be used instead.
2957 set_backtrace(init_error(), nullptr);
2958 } else {
2959 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2960 init_error->klass()->external_name());
2961 current->clear_pending_exception();
2962 }
2963
2964 return init_error;
2965 }
2966
2967 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2968 JavaThread* current = JavaThread::current();
2969 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2970 BacktraceIterator iter(result, current);
2971 // No backtrace available.
2972 if (!iter.repeat()) return false;
2973
2974 // If the exception happened in a frame that has been hidden, i.e.,
2975 // omitted from the back trace, we can not compute the message.
2976 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2977 if (hidden != nullptr) {
2978 return false;
2979 }
2980
2981 // Get first backtrace element.
2982 BacktraceElement bte = iter.next(current);
2983
2984 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2985 assert(holder != nullptr, "first element should be non-null");
2986 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2987
2988 // Original version is no longer available.
2989 if (m == nullptr || !version_matches(m, bte._version)) {
2990 return false;
2991 }
2992
2993 *method = m;
2994 *bci = bte._bci;
2995 return true;
2996 }
2997
2998 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2999 // Allocate java.lang.StackTraceElement instance
3000 InstanceKlass* k = vmClasses::StackTraceElement_klass();
3001 assert(k != nullptr, "must be loaded in 1.4+");
3002 if (k->should_be_initialized()) {
3003 k->initialize(CHECK_NULL);
3004 }
3005
3006 Handle element = k->allocate_instance_handle(CHECK_NULL);
3007
3008 int version = method->constants()->version();
3009 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3010 return element();
3011 }
3012
3013 void java_lang_StackTraceElement::fill_in(Handle element,
3014 InstanceKlass* holder, const methodHandle& method,
3015 int version, int bci, Symbol* name, TRAPS) {
3016 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3017
3018 ResourceMark rm(THREAD);
3019 HandleMark hm(THREAD);
3020
3021 // Fill in class name
3022 Handle java_class(THREAD, holder->java_mirror());
3023 oop classname = java_lang_Class::name(java_class, CHECK);
3024 java_lang_StackTraceElement::set_declaringClass(element(), classname);
3025 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3026
3027 oop loader = holder->class_loader();
3028 if (loader != nullptr) {
3029 oop loader_name = java_lang_ClassLoader::name(loader);
3030 if (loader_name != nullptr)
3031 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3032 }
3033
3034 // Fill in method name
3035 oop methodname = StringTable::intern(name, CHECK);
3036 java_lang_StackTraceElement::set_methodName(element(), methodname);
3037
3038 // Fill in module name and version
3039 ModuleEntry* module = holder->module();
3040 if (module->is_named()) {
3041 oop module_name = StringTable::intern(module->name(), CHECK);
3042 java_lang_StackTraceElement::set_moduleName(element(), module_name);
3043 oop module_version;
3044 if (module->version() != nullptr) {
3045 module_version = StringTable::intern(module->version(), CHECK);
3046 } else {
3047 module_version = nullptr;
3048 }
3049 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3050 }
3051
3052 if (method() == nullptr || !version_matches(method(), version)) {
3053 // The method was redefined, accurate line number information isn't available
3054 java_lang_StackTraceElement::set_fileName(element(), nullptr);
3055 java_lang_StackTraceElement::set_lineNumber(element(), -1);
3056 } else {
3057 Symbol* source;
3058 oop source_file;
3059 int line_number;
3060 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3061
3062 java_lang_StackTraceElement::set_fileName(element(), source_file);
3063 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3064 }
3065 }
3066
3067 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3068 InstanceKlass* holder,
3069 int version,
3070 const methodHandle& method,
3071 int bci,
3072 Symbol*& source,
3073 oop& source_file,
3074 int& line_number, TRAPS) {
3075 // Fill in source file name and line number.
3076 source = Backtrace::get_source_file_name(holder, version);
3077 source_file = java_lang_Class::source_file(java_class());
3078 if (source != nullptr) {
3079 // Class was not redefined. We can trust its cache if set,
3080 // else we have to initialize it.
3081 if (source_file == nullptr) {
3082 source_file = StringTable::intern(source, CHECK);
3083 java_lang_Class::set_source_file(java_class(), source_file);
3084 }
3085 } else {
3086 // Class was redefined. Dump the cache if it was set.
3087 if (source_file != nullptr) {
3088 source_file = nullptr;
3089 java_lang_Class::set_source_file(java_class(), source_file);
3090 }
3091 }
3092 line_number = Backtrace::get_line_number(method(), bci);
3093 }
3094
3095 #if INCLUDE_JVMCI
3096 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3097 Symbol*& filename, int& line_number, TRAPS) {
3098 ResourceMark rm(THREAD);
3099 HandleMark hm(THREAD);
3100
3101 filename = nullptr;
3102 line_number = -1;
3103
3104 oop source_file;
3105 int version = method->constants()->version();
3106 InstanceKlass* holder = method->method_holder();
3107 Handle java_class(THREAD, holder->java_mirror());
3108 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3109 }
3110 #endif // INCLUDE_JVMCI
3111
3112 // java_lang_ClassFrameInfo
3113
3114 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3115 int java_lang_ClassFrameInfo::_flags_offset;
3116
3117 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3118 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3119 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3120
3121 void java_lang_ClassFrameInfo::compute_offsets() {
3122 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3123 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3124 }
3125
3126 #if INCLUDE_CDS
3127 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3128 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3129 }
3130 #endif
3131
3132 static int get_flags(const methodHandle& m) {
3133 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS );
3134 if (m->is_object_initializer()) {
3135 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3136 } else {
3137 // Note: Static initializers can be here. Record them as plain methods.
3138 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3139 }
3140 if (m->caller_sensitive()) {
3141 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3142 }
3143 if (m->is_hidden()) {
3144 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3145 }
3146 assert((flags & 0xFF000000) == 0, "unexpected flags");
3147 return flags;
3148 }
3149
3150 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3151 return obj->obj_field(_classOrMemberName_offset);
3152 }
3153
3154 int java_lang_ClassFrameInfo::flags(oop obj) {
3155 return obj->int_field(_flags_offset);
3156 }
3157
3158 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3159 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3160 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3161 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3162 stackFrame->int_field_put(_flags_offset, flags);
3163 }
3164
3165 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3166 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3167 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3168 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3169 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3170 stackFrame->int_field_put(_flags_offset, flags);
3171 }
3172
3173
3174 // java_lang_StackFrameInfo
3175
3176 int java_lang_StackFrameInfo::_type_offset;
3177 int java_lang_StackFrameInfo::_name_offset;
3178 int java_lang_StackFrameInfo::_bci_offset;
3179 int java_lang_StackFrameInfo::_version_offset;
3180 int java_lang_StackFrameInfo::_contScope_offset;
3181
3182 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3183 macro(_type_offset, k, "type", object_signature, false); \
3184 macro(_name_offset, k, "name", string_signature, false); \
3185 macro(_bci_offset, k, "bci", int_signature, false); \
3186 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3187
3188 void java_lang_StackFrameInfo::compute_offsets() {
3189 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3190 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3191 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3192 }
3193
3194 #if INCLUDE_CDS
3195 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3196 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3197 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3198 }
3199 #endif
3200
3201 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3202 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3203 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3204 return method;
3205 }
3206
3207 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3208 // set Method* or mid/cpref
3209 HandleMark hm(THREAD);
3210 Handle cont_h(THREAD, cont);
3211 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3212
3213 // set bci
3214 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3215 // method may be redefined; store the version
3216 int version = method->constants()->version();
3217 assert((jushort)version == version, "version should be short");
3218 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3219
3220 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3221 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3222 }
3223
3224 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3225 ResourceMark rm(THREAD);
3226 HandleMark hm(THREAD);
3227
3228 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3229 InstanceKlass* holder = method->method_holder();
3230 short version = stackFrame->short_field(_version_offset);
3231 int bci = stackFrame->int_field(_bci_offset);
3232 Symbol* name = method->name();
3233 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3234 }
3235
3236 oop java_lang_StackFrameInfo::type(oop obj) {
3237 return obj->obj_field(_type_offset);
3238 }
3239
3240 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3241 obj->obj_field_put(_type_offset, value);
3242 }
3243
3244 oop java_lang_StackFrameInfo::name(oop obj) {
3245 return obj->obj_field(_name_offset);
3246 }
3247
3248 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3249 obj->obj_field_put(_name_offset, value);
3250 }
3251
3252 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3253 obj->short_field_put(_version_offset, value);
3254 }
3255
3256 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3257 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3258 obj->int_field_put(_bci_offset, value);
3259 }
3260
3261 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3262 obj->obj_field_put(_contScope_offset, value);
3263 }
3264
3265 int java_lang_LiveStackFrameInfo::_monitors_offset;
3266 int java_lang_LiveStackFrameInfo::_locals_offset;
3267 int java_lang_LiveStackFrameInfo::_operands_offset;
3268 int java_lang_LiveStackFrameInfo::_mode_offset;
3269
3270 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3271 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3272 macro(_locals_offset, k, "locals", object_array_signature, false); \
3273 macro(_operands_offset, k, "operands", object_array_signature, false); \
3274 macro(_mode_offset, k, "mode", int_signature, false)
3275
3276 void java_lang_LiveStackFrameInfo::compute_offsets() {
3277 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3278 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3279 }
3280
3281 #if INCLUDE_CDS
3282 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3283 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3284 }
3285 #endif
3286
3287 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3288 obj->obj_field_put(_monitors_offset, value);
3289 }
3290
3291 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3292 obj->obj_field_put(_locals_offset, value);
3293 }
3294
3295 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3296 obj->obj_field_put(_operands_offset, value);
3297 }
3298
3299 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3300 obj->int_field_put(_mode_offset, value);
3301 }
3302
3303
3304 // java_lang_AccessibleObject
3305
3306 int java_lang_reflect_AccessibleObject::_override_offset;
3307
3308 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3309 macro(_override_offset, k, "override", bool_signature, false)
3310
3311 void java_lang_reflect_AccessibleObject::compute_offsets() {
3312 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3313 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3314 }
3315
3316 #if INCLUDE_CDS
3317 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3318 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3319 }
3320 #endif
3321
3322 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3323 return (jboolean) reflect->bool_field(_override_offset);
3324 }
3325
3326 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3327 reflect->bool_field_put(_override_offset, (int) value);
3328 }
3329
3330 // java_lang_reflect_Method
3331
3332 int java_lang_reflect_Method::_clazz_offset;
3333 int java_lang_reflect_Method::_name_offset;
3334 int java_lang_reflect_Method::_returnType_offset;
3335 int java_lang_reflect_Method::_parameterTypes_offset;
3336 int java_lang_reflect_Method::_exceptionTypes_offset;
3337 int java_lang_reflect_Method::_slot_offset;
3338 int java_lang_reflect_Method::_modifiers_offset;
3339 int java_lang_reflect_Method::_signature_offset;
3340 int java_lang_reflect_Method::_annotations_offset;
3341 int java_lang_reflect_Method::_parameter_annotations_offset;
3342 int java_lang_reflect_Method::_annotation_default_offset;
3343
3344 #define METHOD_FIELDS_DO(macro) \
3345 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3346 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3347 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3348 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3349 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3350 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3351 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3352 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3353 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3354 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3355 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3356
3357 void java_lang_reflect_Method::compute_offsets() {
3358 InstanceKlass* k = vmClasses::reflect_Method_klass();
3359 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3360 }
3361
3362 #if INCLUDE_CDS
3363 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3364 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3365 }
3366 #endif
3367
3368 Handle java_lang_reflect_Method::create(TRAPS) {
3369 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3370 Klass* klass = vmClasses::reflect_Method_klass();
3371 // This class is eagerly initialized during VM initialization, since we keep a reference
3372 // to one of the methods
3373 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3374 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3375 }
3376
3377 oop java_lang_reflect_Method::clazz(oop reflect) {
3378 return reflect->obj_field(_clazz_offset);
3379 }
3380
3381 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3382 reflect->obj_field_put(_clazz_offset, value);
3383 }
3384
3385 int java_lang_reflect_Method::slot(oop reflect) {
3386 return reflect->int_field(_slot_offset);
3387 }
3388
3389 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3390 reflect->int_field_put(_slot_offset, value);
3391 }
3392
3393 void java_lang_reflect_Method::set_name(oop method, oop value) {
3394 method->obj_field_put(_name_offset, value);
3395 }
3396
3397 oop java_lang_reflect_Method::return_type(oop method) {
3398 return method->obj_field(_returnType_offset);
3399 }
3400
3401 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3402 method->obj_field_put(_returnType_offset, value);
3403 }
3404
3405 oop java_lang_reflect_Method::parameter_types(oop method) {
3406 return method->obj_field(_parameterTypes_offset);
3407 }
3408
3409 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3410 method->obj_field_put(_parameterTypes_offset, value);
3411 }
3412
3413 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3414 method->obj_field_put(_exceptionTypes_offset, value);
3415 }
3416
3417 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3418 method->int_field_put(_modifiers_offset, value);
3419 }
3420
3421 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3422 method->obj_field_put(_signature_offset, value);
3423 }
3424
3425 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3426 method->obj_field_put(_annotations_offset, value);
3427 }
3428
3429 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3430 method->obj_field_put(_parameter_annotations_offset, value);
3431 }
3432
3433 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3434 method->obj_field_put(_annotation_default_offset, value);
3435 }
3436
3437 int java_lang_reflect_Constructor::_clazz_offset;
3438 int java_lang_reflect_Constructor::_parameterTypes_offset;
3439 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3440 int java_lang_reflect_Constructor::_slot_offset;
3441 int java_lang_reflect_Constructor::_modifiers_offset;
3442 int java_lang_reflect_Constructor::_signature_offset;
3443 int java_lang_reflect_Constructor::_annotations_offset;
3444 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3445
3446 #define CONSTRUCTOR_FIELDS_DO(macro) \
3447 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3448 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3449 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3450 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3451 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3452 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3453 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3454 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3455
3456 void java_lang_reflect_Constructor::compute_offsets() {
3457 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3458 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3459 }
3460
3461 #if INCLUDE_CDS
3462 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3463 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3464 }
3465 #endif
3466
3467 Handle java_lang_reflect_Constructor::create(TRAPS) {
3468 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3469 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3470 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3471 InstanceKlass* ik = InstanceKlass::cast(k);
3472 // Ensure it is initialized
3473 ik->initialize(CHECK_NH);
3474 return ik->allocate_instance_handle(THREAD);
3475 }
3476
3477 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3478 return reflect->obj_field(_clazz_offset);
3479 }
3480
3481 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3482 reflect->obj_field_put(_clazz_offset, value);
3483 }
3484
3485 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3486 return constructor->obj_field(_parameterTypes_offset);
3487 }
3488
3489 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3490 constructor->obj_field_put(_parameterTypes_offset, value);
3491 }
3492
3493 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3494 constructor->obj_field_put(_exceptionTypes_offset, value);
3495 }
3496
3497 int java_lang_reflect_Constructor::slot(oop reflect) {
3498 return reflect->int_field(_slot_offset);
3499 }
3500
3501 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3502 reflect->int_field_put(_slot_offset, value);
3503 }
3504
3505 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3506 constructor->int_field_put(_modifiers_offset, value);
3507 }
3508
3509 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3510 constructor->obj_field_put(_signature_offset, value);
3511 }
3512
3513 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3514 constructor->obj_field_put(_annotations_offset, value);
3515 }
3516
3517 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3518 method->obj_field_put(_parameter_annotations_offset, value);
3519 }
3520
3521 int java_lang_reflect_Field::_clazz_offset;
3522 int java_lang_reflect_Field::_name_offset;
3523 int java_lang_reflect_Field::_type_offset;
3524 int java_lang_reflect_Field::_slot_offset;
3525 int java_lang_reflect_Field::_modifiers_offset;
3526 int java_lang_reflect_Field::_trusted_final_offset;
3527 int java_lang_reflect_Field::_signature_offset;
3528 int java_lang_reflect_Field::_annotations_offset;
3529
3530 #define FIELD_FIELDS_DO(macro) \
3531 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3532 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3533 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3534 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3535 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3536 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3537 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3538 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3539
3540 void java_lang_reflect_Field::compute_offsets() {
3541 InstanceKlass* k = vmClasses::reflect_Field_klass();
3542 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3543 }
3544
3545 #if INCLUDE_CDS
3546 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3547 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3548 }
3549 #endif
3550
3551 Handle java_lang_reflect_Field::create(TRAPS) {
3552 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3553 Symbol* name = vmSymbols::java_lang_reflect_Field();
3554 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3555 InstanceKlass* ik = InstanceKlass::cast(k);
3556 // Ensure it is initialized
3557 ik->initialize(CHECK_NH);
3558 return ik->allocate_instance_handle(THREAD);
3559 }
3560
3561 oop java_lang_reflect_Field::clazz(oop reflect) {
3562 return reflect->obj_field(_clazz_offset);
3563 }
3564
3565 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3566 reflect->obj_field_put(_clazz_offset, value);
3567 }
3568
3569 oop java_lang_reflect_Field::name(oop field) {
3570 return field->obj_field(_name_offset);
3571 }
3572
3573 void java_lang_reflect_Field::set_name(oop field, oop value) {
3574 field->obj_field_put(_name_offset, value);
3575 }
3576
3577 oop java_lang_reflect_Field::type(oop field) {
3578 return field->obj_field(_type_offset);
3579 }
3580
3581 void java_lang_reflect_Field::set_type(oop field, oop value) {
3582 field->obj_field_put(_type_offset, value);
3583 }
3584
3585 int java_lang_reflect_Field::slot(oop reflect) {
3586 return reflect->int_field(_slot_offset);
3587 }
3588
3589 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3590 reflect->int_field_put(_slot_offset, value);
3591 }
3592
3593 int java_lang_reflect_Field::modifiers(oop field) {
3594 return field->int_field(_modifiers_offset);
3595 }
3596
3597 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3598 field->int_field_put(_modifiers_offset, value);
3599 }
3600
3601 void java_lang_reflect_Field::set_trusted_final(oop field) {
3602 field->bool_field_put(_trusted_final_offset, true);
3603 }
3604
3605 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3606 field->obj_field_put(_signature_offset, value);
3607 }
3608
3609 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3610 field->obj_field_put(_annotations_offset, value);
3611 }
3612
3613 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3614 // Allocate java.lang.reflect.RecordComponent instance
3615 HandleMark hm(THREAD);
3616 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3617 assert(ik != nullptr, "must be loaded");
3618 ik->initialize(CHECK_NULL);
3619
3620 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3621
3622 Handle decl_class(THREAD, holder->java_mirror());
3623 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3624
3625 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3626 oop component_name = StringTable::intern(name, CHECK_NULL);
3627 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3628
3629 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3630 Handle component_type_h =
3631 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3632 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3633
3634 Method* accessor_method = nullptr;
3635 {
3636 // Prepend "()" to type to create the full method signature.
3637 ResourceMark rm(THREAD);
3638 int sig_len = type->utf8_length() + 3; // "()" and null char
3639 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3640 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3641 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3642 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3643 }
3644
3645 if (accessor_method != nullptr) {
3646 methodHandle method(THREAD, accessor_method);
3647 oop m = Reflection::new_method(method, false, CHECK_NULL);
3648 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3649 } else {
3650 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3651 }
3652
3653 int sig_index = component->generic_signature_index();
3654 if (sig_index > 0) {
3655 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3656 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3657 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3658 } else {
3659 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3660 }
3661
3662 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3663 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3664
3665 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3666 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3667
3668 return element();
3669 }
3670
3671 int reflect_ConstantPool::_oop_offset;
3672
3673 #define CONSTANTPOOL_FIELDS_DO(macro) \
3674 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3675
3676 void reflect_ConstantPool::compute_offsets() {
3677 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3678 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3679 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3680 }
3681
3682 #if INCLUDE_CDS
3683 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3684 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3685 }
3686 #endif
3687
3688 int java_lang_reflect_Parameter::_name_offset;
3689 int java_lang_reflect_Parameter::_modifiers_offset;
3690 int java_lang_reflect_Parameter::_index_offset;
3691 int java_lang_reflect_Parameter::_executable_offset;
3692
3693 #define PARAMETER_FIELDS_DO(macro) \
3694 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3695 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3696 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3697 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3698
3699 void java_lang_reflect_Parameter::compute_offsets() {
3700 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3701 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3702 }
3703
3704 #if INCLUDE_CDS
3705 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3706 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3707 }
3708 #endif
3709
3710 Handle java_lang_reflect_Parameter::create(TRAPS) {
3711 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3712 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3713 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3714 InstanceKlass* ik = InstanceKlass::cast(k);
3715 // Ensure it is initialized
3716 ik->initialize(CHECK_NH);
3717 return ik->allocate_instance_handle(THREAD);
3718 }
3719
3720 oop java_lang_reflect_Parameter::name(oop param) {
3721 return param->obj_field(_name_offset);
3722 }
3723
3724 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3725 param->obj_field_put(_name_offset, value);
3726 }
3727
3728 int java_lang_reflect_Parameter::modifiers(oop param) {
3729 return param->int_field(_modifiers_offset);
3730 }
3731
3732 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3733 param->int_field_put(_modifiers_offset, value);
3734 }
3735
3736 int java_lang_reflect_Parameter::index(oop param) {
3737 return param->int_field(_index_offset);
3738 }
3739
3740 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3741 param->int_field_put(_index_offset, value);
3742 }
3743
3744 oop java_lang_reflect_Parameter::executable(oop param) {
3745 return param->obj_field(_executable_offset);
3746 }
3747
3748 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3749 param->obj_field_put(_executable_offset, value);
3750 }
3751
3752 // java_lang_Module
3753
3754 int java_lang_Module::_loader_offset;
3755 int java_lang_Module::_name_offset;
3756 int java_lang_Module::_module_entry_offset;
3757
3758 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3759 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3760 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3761 vmSymbols::java_lang_module_init_signature(),
3762 loader, module_name, CHECK_NH);
3763 }
3764
3765 #define MODULE_FIELDS_DO(macro) \
3766 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3767 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3768
3769 void java_lang_Module::compute_offsets() {
3770 InstanceKlass* k = vmClasses::Module_klass();
3771 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3772 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3773 }
3774
3775 #if INCLUDE_CDS
3776 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3777 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3778 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3779 }
3780 #endif
3781
3782 oop java_lang_Module::loader(oop module) {
3783 return module->obj_field(_loader_offset);
3784 }
3785
3786 void java_lang_Module::set_loader(oop module, oop value) {
3787 module->obj_field_put(_loader_offset, value);
3788 }
3789
3790 oop java_lang_Module::name(oop module) {
3791 return module->obj_field(_name_offset);
3792 }
3793
3794 void java_lang_Module::set_name(oop module, oop value) {
3795 module->obj_field_put(_name_offset, value);
3796 }
3797
3798 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3799 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3800 assert(module != nullptr, "module can't be null");
3801 assert(oopDesc::is_oop(module), "module must be oop");
3802
3803 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3804 return module_entry;
3805 }
3806
3807 ModuleEntry* java_lang_Module::module_entry(oop module) {
3808 ModuleEntry* module_entry = module_entry_raw(module);
3809 if (module_entry == nullptr) {
3810 // If the inject field containing the ModuleEntry* is null then return the
3811 // class loader's unnamed module.
3812 oop loader = java_lang_Module::loader(module);
3813 Handle h_loader = Handle(Thread::current(), loader);
3814 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3815 return loader_cld->unnamed_module();
3816 }
3817 return module_entry;
3818 }
3819
3820 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3821 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3822 assert(module != nullptr, "module can't be null");
3823 assert(oopDesc::is_oop(module), "module must be oop");
3824 module->address_field_put(_module_entry_offset, (address)module_entry);
3825 }
3826
3827 Handle reflect_ConstantPool::create(TRAPS) {
3828 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3829 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3830 // Ensure it is initialized
3831 k->initialize(CHECK_NH);
3832 return k->allocate_instance_handle(THREAD);
3833 }
3834
3835
3836 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3837 oop mirror = value->pool_holder()->java_mirror();
3838 // Save the mirror to get back the constant pool.
3839 reflect->obj_field_put(_oop_offset, mirror);
3840 }
3841
3842 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3843
3844 oop mirror = reflect->obj_field(_oop_offset);
3845 Klass* k = java_lang_Class::as_Klass(mirror);
3846 assert(k->is_instance_klass(), "Must be");
3847
3848 // Get the constant pool back from the klass. Since class redefinition
3849 // merges the new constant pool into the old, this is essentially the
3850 // same constant pool as the original. If constant pool merging is
3851 // no longer done in the future, this will have to change to save
3852 // the original.
3853 return InstanceKlass::cast(k)->constants();
3854 }
3855
3856
3857 // Support for java_lang_ref_Reference
3858
3859 bool java_lang_ref_Reference::_offsets_initialized;
3860
3861 int java_lang_ref_Reference::_referent_offset;
3862 int java_lang_ref_Reference::_queue_offset;
3863 int java_lang_ref_Reference::_next_offset;
3864 int java_lang_ref_Reference::_discovered_offset;
3865
3866 #define REFERENCE_FIELDS_DO(macro) \
3867 macro(_referent_offset, k, "referent", object_signature, false); \
3868 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3869 macro(_next_offset, k, "next", reference_signature, false); \
3870 macro(_discovered_offset, k, "discovered", reference_signature, false);
3871
3872 void java_lang_ref_Reference::compute_offsets() {
3873 if (_offsets_initialized) {
3874 return;
3875 }
3876 _offsets_initialized = true;
3877 InstanceKlass* k = vmClasses::Reference_klass();
3878 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3879 }
3880
3881 #if INCLUDE_CDS
3882 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3883 f->do_bool(&_offsets_initialized);
3884 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3885 }
3886 #endif
3887
3888 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3889 assert(obj != nullptr, "sanity");
3890 if (offset != _referent_offset) {
3891 return false;
3892 }
3893
3894 Klass* k = obj->klass();
3895 if (!k->is_instance_klass()) {
3896 return false;
3897 }
3898
3899 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3900 bool is_reference = ik->reference_type() != REF_NONE;
3901 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3902 return is_reference;
3903 }
3904
3905 int java_lang_boxing_object::_value_offset;
3906 int java_lang_boxing_object::_long_value_offset;
3907
3908 #define BOXING_FIELDS_DO(macro) \
3909 macro(_value_offset, integerKlass, "value", int_signature, false); \
3910 macro(_long_value_offset, longKlass, "value", long_signature, false);
3911
3912 void java_lang_boxing_object::compute_offsets() {
3913 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3914 InstanceKlass* longKlass = vmClasses::Long_klass();
3915 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3916 }
3917
3918 #if INCLUDE_CDS
3919 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3920 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3921 }
3922 #endif
3923
3924 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3925 Klass* k = vmClasses::box_klass(type);
3926 if (k == nullptr) return nullptr;
3927 InstanceKlass* ik = InstanceKlass::cast(k);
3928 if (!ik->is_initialized()) {
3929 ik->initialize(CHECK_NULL);
3930 }
3931 return ik->allocate_instance(THREAD);
3932 }
3933
3934
3935 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3936 oop box = initialize_and_allocate(type, CHECK_NULL);
3937 if (box == nullptr) return nullptr;
3938 switch (type) {
3939 case T_BOOLEAN:
3940 box->bool_field_put(_value_offset, value->z);
3941 break;
3942 case T_CHAR:
3943 box->char_field_put(_value_offset, value->c);
3944 break;
3945 case T_FLOAT:
3946 box->float_field_put(_value_offset, value->f);
3947 break;
3948 case T_DOUBLE:
3949 box->double_field_put(_long_value_offset, value->d);
3950 break;
3951 case T_BYTE:
3952 box->byte_field_put(_value_offset, value->b);
3953 break;
3954 case T_SHORT:
3955 box->short_field_put(_value_offset, value->s);
3956 break;
3957 case T_INT:
3958 box->int_field_put(_value_offset, value->i);
3959 break;
3960 case T_LONG:
3961 box->long_field_put(_long_value_offset, value->j);
3962 break;
3963 default:
3964 return nullptr;
3965 }
3966 return box;
3967 }
3968
3969
3970 BasicType java_lang_boxing_object::basic_type(oop box) {
3971 if (box == nullptr) return T_ILLEGAL;
3972 BasicType type = vmClasses::box_klass_type(box->klass());
3973 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3974 return T_ILLEGAL;
3975 return type;
3976 }
3977
3978
3979 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3980 BasicType type = vmClasses::box_klass_type(box->klass());
3981 switch (type) {
3982 case T_BOOLEAN:
3983 value->z = box->bool_field(_value_offset);
3984 break;
3985 case T_CHAR:
3986 value->c = box->char_field(_value_offset);
3987 break;
3988 case T_FLOAT:
3989 value->f = box->float_field(_value_offset);
3990 break;
3991 case T_DOUBLE:
3992 value->d = box->double_field(_long_value_offset);
3993 break;
3994 case T_BYTE:
3995 value->b = box->byte_field(_value_offset);
3996 break;
3997 case T_SHORT:
3998 value->s = box->short_field(_value_offset);
3999 break;
4000 case T_INT:
4001 value->i = box->int_field(_value_offset);
4002 break;
4003 case T_LONG:
4004 value->j = box->long_field(_long_value_offset);
4005 break;
4006 default:
4007 return T_ILLEGAL;
4008 } // end switch
4009 return type;
4010 }
4011
4012
4013 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4014 BasicType type = vmClasses::box_klass_type(box->klass());
4015 switch (type) {
4016 case T_BOOLEAN:
4017 box->bool_field_put(_value_offset, value->z);
4018 break;
4019 case T_CHAR:
4020 box->char_field_put(_value_offset, value->c);
4021 break;
4022 case T_FLOAT:
4023 box->float_field_put(_value_offset, value->f);
4024 break;
4025 case T_DOUBLE:
4026 box->double_field_put(_long_value_offset, value->d);
4027 break;
4028 case T_BYTE:
4029 box->byte_field_put(_value_offset, value->b);
4030 break;
4031 case T_SHORT:
4032 box->short_field_put(_value_offset, value->s);
4033 break;
4034 case T_INT:
4035 box->int_field_put(_value_offset, value->i);
4036 break;
4037 case T_LONG:
4038 box->long_field_put(_long_value_offset, value->j);
4039 break;
4040 default:
4041 return T_ILLEGAL;
4042 } // end switch
4043 return type;
4044 }
4045
4046
4047 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4048 switch (type) {
4049 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
4050 case T_CHAR: st->print("%d", value->c); break;
4051 case T_BYTE: st->print("%d", value->b); break;
4052 case T_SHORT: st->print("%d", value->s); break;
4053 case T_INT: st->print("%d", value->i); break;
4054 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
4055 case T_FLOAT: st->print("%f", value->f); break;
4056 case T_DOUBLE: st->print("%lf", value->d); break;
4057 default: st->print("type %d?", type); break;
4058 }
4059 }
4060
4061
4062 // Support for java_lang_ref_SoftReference
4063 //
4064
4065 int java_lang_ref_SoftReference::_timestamp_offset;
4066 int java_lang_ref_SoftReference::_static_clock_offset;
4067
4068 #define SOFTREFERENCE_FIELDS_DO(macro) \
4069 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
4070 macro(_static_clock_offset, k, "clock", long_signature, true)
4071
4072 void java_lang_ref_SoftReference::compute_offsets() {
4073 InstanceKlass* k = vmClasses::SoftReference_klass();
4074 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4075 }
4076
4077 #if INCLUDE_CDS
4078 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4079 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4080 }
4081 #endif
4082
4083 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4084 return ref->long_field(_timestamp_offset);
4085 }
4086
4087 jlong java_lang_ref_SoftReference::clock() {
4088 InstanceKlass* ik = vmClasses::SoftReference_klass();
4089 oop base = ik->static_field_base_raw();
4090 return base->long_field(_static_clock_offset);
4091 }
4092
4093 void java_lang_ref_SoftReference::set_clock(jlong value) {
4094 InstanceKlass* ik = vmClasses::SoftReference_klass();
4095 oop base = ik->static_field_base_raw();
4096 base->long_field_put(_static_clock_offset, value);
4097 }
4098
4099 // Support for java_lang_invoke_DirectMethodHandle
4100
4101 int java_lang_invoke_DirectMethodHandle::_member_offset;
4102
4103 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4104 oop member_name = nullptr;
4105 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4106 "a DirectMethodHandle oop is expected");
4107 return dmh->obj_field(_member_offset);
4108 }
4109
4110 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4111 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4112
4113 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4114 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4115 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4116 }
4117
4118 #if INCLUDE_CDS
4119 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4120 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4121 }
4122 #endif
4123
4124 // Support for java_lang_invoke_MethodHandle
4125
4126 int java_lang_invoke_MethodHandle::_type_offset;
4127 int java_lang_invoke_MethodHandle::_form_offset;
4128
4129 int java_lang_invoke_MemberName::_clazz_offset;
4130 int java_lang_invoke_MemberName::_name_offset;
4131 int java_lang_invoke_MemberName::_type_offset;
4132 int java_lang_invoke_MemberName::_flags_offset;
4133 int java_lang_invoke_MemberName::_method_offset;
4134 int java_lang_invoke_MemberName::_vmindex_offset;
4135
4136 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4137 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4138
4139 int java_lang_invoke_LambdaForm::_vmentry_offset;
4140
4141 #define METHODHANDLE_FIELDS_DO(macro) \
4142 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4143 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4144
4145 void java_lang_invoke_MethodHandle::compute_offsets() {
4146 InstanceKlass* k = vmClasses::MethodHandle_klass();
4147 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4148 }
4149
4150 #if INCLUDE_CDS
4151 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4152 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4153 }
4154 #endif
4155
4156 #define MEMBERNAME_FIELDS_DO(macro) \
4157 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4158 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4159 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4160 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4161 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4162
4163 void java_lang_invoke_MemberName::compute_offsets() {
4164 InstanceKlass* k = vmClasses::MemberName_klass();
4165 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4166 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4167 }
4168
4169 #if INCLUDE_CDS
4170 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4171 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4172 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4173 }
4174 #endif
4175
4176 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4177 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4178
4179 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4180 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4181 assert(k != nullptr, "jdk mismatch");
4182 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4183 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4184 }
4185
4186 #if INCLUDE_CDS
4187 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4188 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4189 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4190 }
4191 #endif
4192
4193 #define LAMBDAFORM_FIELDS_DO(macro) \
4194 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4195
4196 void java_lang_invoke_LambdaForm::compute_offsets() {
4197 InstanceKlass* k = vmClasses::LambdaForm_klass();
4198 assert (k != nullptr, "jdk mismatch");
4199 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4200 }
4201
4202 #if INCLUDE_CDS
4203 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4204 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4205 }
4206 #endif
4207
4208 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4209 return obj != nullptr && is_subclass(obj->klass());
4210 }
4211
4212 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4213 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4214
4215 #define NEP_FIELDS_DO(macro) \
4216 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4217 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4218
4219 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4220 return obj != nullptr && is_subclass(obj->klass());
4221 }
4222
4223 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4224 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4225 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4226 }
4227
4228 #if INCLUDE_CDS
4229 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4230 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4231 }
4232 #endif
4233
4234 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4235 return entry->obj_field(_method_type_offset);
4236 }
4237
4238 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4239 return entry->long_field(_downcall_stub_address_offset);
4240 }
4241
4242 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4243 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4244 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4245 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4246 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4247 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4248 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4249
4250 #define ABIDescriptor_FIELDS_DO(macro) \
4251 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4252 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4253 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4254 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4255 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4256 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4257 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4258
4259 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4260 return obj != nullptr && is_subclass(obj->klass());
4261 }
4262
4263 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4264 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4265 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4266 }
4267
4268 #if INCLUDE_CDS
4269 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4270 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4271 }
4272 #endif
4273
4274 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4275 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4276 }
4277
4278 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4279 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4280 }
4281
4282 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4283 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4284 }
4285
4286 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4287 return entry->int_field(_stackAlignment_offset);
4288 }
4289
4290 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4291 return entry->int_field(_shadowSpace_offset);
4292 }
4293
4294 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4295 return entry->obj_field(_scratch1_offset);
4296 }
4297
4298 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4299 return entry->obj_field(_scratch2_offset);
4300 }
4301
4302 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4303 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4304 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4305 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4306
4307 #define VMStorage_FIELDS_DO(macro) \
4308 macro(_type_offset, k, "type", byte_signature, false); \
4309 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4310 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4311 macro(_debugName_offset, k, "debugName", string_signature, false); \
4312
4313 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4314 return obj != nullptr && is_subclass(obj->klass());
4315 }
4316
4317 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4318 InstanceKlass* k = vmClasses::VMStorage_klass();
4319 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4320 }
4321
4322 #if INCLUDE_CDS
4323 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4324 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4325 }
4326 #endif
4327
4328 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4329 return entry->byte_field(_type_offset);
4330 }
4331
4332 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4333 return entry->int_field(_indexOrOffset_offset);
4334 }
4335
4336 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4337 return entry->short_field(_segmentMaskOrSize_offset);
4338 }
4339
4340 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4341 return entry->obj_field(_debugName_offset);
4342 }
4343
4344 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4345 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4346
4347 #define CallConv_FIELDS_DO(macro) \
4348 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4349 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4350
4351 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4352 return obj != nullptr && is_subclass(obj->klass());
4353 }
4354
4355 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4356 InstanceKlass* k = vmClasses::CallConv_klass();
4357 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4358 }
4359
4360 #if INCLUDE_CDS
4361 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4362 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4363 }
4364 #endif
4365
4366 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4367 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4368 }
4369
4370 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4371 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4372 }
4373
4374 oop java_lang_invoke_MethodHandle::type(oop mh) {
4375 return mh->obj_field(_type_offset);
4376 }
4377
4378 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4379 mh->obj_field_put(_type_offset, mtype);
4380 }
4381
4382 oop java_lang_invoke_MethodHandle::form(oop mh) {
4383 assert(_form_offset != 0, "");
4384 return mh->obj_field(_form_offset);
4385 }
4386
4387 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4388 assert(_form_offset != 0, "");
4389 mh->obj_field_put(_form_offset, lform);
4390 }
4391
4392 /// MemberName accessors
4393
4394 oop java_lang_invoke_MemberName::clazz(oop mname) {
4395 assert(is_instance(mname), "wrong type");
4396 return mname->obj_field(_clazz_offset);
4397 }
4398
4399 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4400 assert(is_instance(mname), "wrong type");
4401 mname->obj_field_put(_clazz_offset, clazz);
4402 }
4403
4404 oop java_lang_invoke_MemberName::name(oop mname) {
4405 assert(is_instance(mname), "wrong type");
4406 return mname->obj_field(_name_offset);
4407 }
4408
4409 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4410 assert(is_instance(mname), "wrong type");
4411 mname->obj_field_put(_name_offset, name);
4412 }
4413
4414 oop java_lang_invoke_MemberName::type(oop mname) {
4415 assert(is_instance(mname), "wrong type");
4416 return mname->obj_field(_type_offset);
4417 }
4418
4419 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4420 assert(is_instance(mname), "wrong type");
4421 mname->obj_field_put(_type_offset, type);
4422 }
4423
4424 int java_lang_invoke_MemberName::flags(oop mname) {
4425 assert(is_instance(mname), "wrong type");
4426 return mname->int_field(_flags_offset);
4427 }
4428
4429 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4430 assert(is_instance(mname), "wrong type");
4431 mname->int_field_put(_flags_offset, flags);
4432 }
4433
4434
4435 // Return vmtarget from ResolvedMethodName method field through indirection
4436 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4437 assert(is_instance(mname), "wrong type");
4438 oop method = mname->obj_field(_method_offset);
4439 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4440 }
4441
4442 bool java_lang_invoke_MemberName::is_method(oop mname) {
4443 assert(is_instance(mname), "must be MemberName");
4444 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4445 }
4446
4447 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4448 assert(is_instance(mname), "wrong type");
4449 mname->obj_field_put(_method_offset, resolved_method);
4450 }
4451
4452 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4453 assert(is_instance(mname), "wrong type");
4454 return (intptr_t) mname->address_field(_vmindex_offset);
4455 }
4456
4457 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4458 assert(is_instance(mname), "wrong type");
4459 mname->address_field_put(_vmindex_offset, (address) index);
4460 }
4461
4462
4463 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4464 assert(is_instance(resolved_method), "wrong type");
4465 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4466 assert(m->is_method(), "must be");
4467 return m;
4468 }
4469
4470 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4471 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4472 assert(is_instance(resolved_method), "wrong type");
4473 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4474 }
4475
4476 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4477 assert(is_instance(resolved_method), "wrong type");
4478 resolved_method->obj_field_put(_vmholder_offset, holder);
4479 }
4480
4481 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4482 const Method* method = m();
4483
4484 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4485 oop resolved_method = ResolvedMethodTable::find_method(method);
4486 if (resolved_method != nullptr) {
4487 return resolved_method;
4488 }
4489
4490 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4491 if (!k->is_initialized()) {
4492 k->initialize(CHECK_NULL);
4493 }
4494
4495 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4496
4497 NoSafepointVerifier nsv;
4498
4499 if (method->is_old()) {
4500 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4501 method->get_new_method();
4502 }
4503
4504 InstanceKlass* holder = method->method_holder();
4505
4506 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4507 // Add a reference to the loader (actually mirror because hidden classes may not have
4508 // distinct loaders) to ensure the metadata is kept alive.
4509 // This mirror may be different than the one in clazz field.
4510 set_vmholder(new_resolved_method, holder->java_mirror());
4511
4512 // Set flag in class to indicate this InstanceKlass has entries in the table
4513 // to avoid walking table during redefinition if none of the redefined classes
4514 // have any membernames in the table.
4515 holder->set_has_resolved_methods();
4516
4517 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4518 }
4519
4520 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4521 assert(is_instance(lform), "wrong type");
4522 return lform->obj_field(_vmentry_offset);
4523 }
4524
4525
4526 // Support for java_lang_invoke_MethodType
4527
4528 int java_lang_invoke_MethodType::_rtype_offset;
4529 int java_lang_invoke_MethodType::_ptypes_offset;
4530
4531 #define METHODTYPE_FIELDS_DO(macro) \
4532 macro(_rtype_offset, k, "rtype", class_signature, false); \
4533 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4534
4535 void java_lang_invoke_MethodType::compute_offsets() {
4536 InstanceKlass* k = vmClasses::MethodType_klass();
4537 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4538 }
4539
4540 #if INCLUDE_CDS
4541 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4542 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4543 }
4544 #endif
4545
4546 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4547 st->print("(");
4548 objArrayOop pts = ptypes(mt);
4549 if (pts != nullptr) {
4550 for (int i = 0, limit = pts->length(); i < limit; i++) {
4551 java_lang_Class::print_signature(pts->obj_at(i), st);
4552 }
4553 } else {
4554 st->print("null");
4555 }
4556 st->print(")");
4557 oop rt = rtype(mt);
4558 if (rt != nullptr) {
4559 java_lang_Class::print_signature(rt, st);
4560 } else {
4561 st->print("null");
4562 }
4563 }
4564
4565 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4566 ResourceMark rm;
4567 stringStream buffer(128);
4568 print_signature(mt, &buffer);
4569 const char* sigstr = buffer.base();
4570 int siglen = (int) buffer.size();
4571 Symbol *name;
4572 if (!intern_if_not_found) {
4573 name = SymbolTable::probe(sigstr, siglen);
4574 } else {
4575 name = SymbolTable::new_symbol(sigstr, siglen);
4576 }
4577 return name;
4578 }
4579
4580 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4581 if (mt1 == mt2)
4582 return true;
4583 if (rtype(mt1) != rtype(mt2))
4584 return false;
4585 if (ptype_count(mt1) != ptype_count(mt2))
4586 return false;
4587 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4588 if (ptype(mt1, i) != ptype(mt2, i))
4589 return false;
4590 }
4591 return true;
4592 }
4593
4594 oop java_lang_invoke_MethodType::rtype(oop mt) {
4595 assert(is_instance(mt), "must be a MethodType");
4596 return mt->obj_field(_rtype_offset);
4597 }
4598
4599 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4600 assert(is_instance(mt), "must be a MethodType");
4601 return (objArrayOop) mt->obj_field(_ptypes_offset);
4602 }
4603
4604 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4605 return ptypes(mt)->obj_at(idx);
4606 }
4607
4608 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4609 return ptypes(mt)->length();
4610 }
4611
4612 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4613 objArrayOop pts = ptypes(mt);
4614 int count = pts->length();
4615 int slots = 0;
4616 for (int i = 0; i < count; i++) {
4617 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4618 slots += type2size[bt];
4619 }
4620 return slots;
4621 }
4622
4623 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4624 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4625 return type2size[bt];
4626 }
4627
4628
4629 // Support for java_lang_invoke_CallSite
4630
4631 int java_lang_invoke_CallSite::_target_offset;
4632 int java_lang_invoke_CallSite::_context_offset;
4633
4634 #define CALLSITE_FIELDS_DO(macro) \
4635 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4636 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4637
4638 void java_lang_invoke_CallSite::compute_offsets() {
4639 InstanceKlass* k = vmClasses::CallSite_klass();
4640 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4641 }
4642
4643 #if INCLUDE_CDS
4644 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4645 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4646 }
4647 #endif
4648
4649 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4650 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4651
4652 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4653 return dep_oop;
4654 }
4655
4656 // Support for java_lang_invoke_ConstantCallSite
4657
4658 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4659
4660 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4661 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4662
4663 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4664 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4665 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4666 }
4667
4668 #if INCLUDE_CDS
4669 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4670 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4671 }
4672 #endif
4673
4674 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4675
4676 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4677 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4678
4679 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4680 InstanceKlass* k = vmClasses::Context_klass();
4681 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4682 }
4683
4684 #if INCLUDE_CDS
4685 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4686 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4687 }
4688 #endif
4689
4690 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4691 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4692 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4693 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4694 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4695 return dep_ctx;
4696 }
4697
4698 // Support for java_security_AccessControlContext
4699
4700 int java_security_AccessControlContext::_context_offset;
4701 int java_security_AccessControlContext::_privilegedContext_offset;
4702 int java_security_AccessControlContext::_isPrivileged_offset;
4703 int java_security_AccessControlContext::_isAuthorized_offset;
4704
4705 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4706 macro(_context_offset, k, "context", protectiondomain_signature, false); \
4707 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4708 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
4709 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
4710
4711 void java_security_AccessControlContext::compute_offsets() {
4712 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4713 InstanceKlass* k = vmClasses::AccessControlContext_klass();
4714 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4715 }
4716
4717 #if INCLUDE_CDS
4718 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4719 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4720 }
4721 #endif
4722
4723 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4724 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4725 assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4726 // Ensure klass is initialized
4727 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4728 // Allocate result
4729 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4730 // Fill in values
4731 result->obj_field_put(_context_offset, context());
4732 result->obj_field_put(_privilegedContext_offset, privileged_context());
4733 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4734 result->bool_field_put(_isAuthorized_offset, true);
4735 return result;
4736 }
4737
4738
4739 // Support for java_lang_ClassLoader
4740
4741 int java_lang_ClassLoader::_loader_data_offset;
4742 int java_lang_ClassLoader::_parallelCapable_offset;
4743 int java_lang_ClassLoader::_name_offset;
4744 int java_lang_ClassLoader::_nameAndId_offset;
4745 int java_lang_ClassLoader::_unnamedModule_offset;
4746 int java_lang_ClassLoader::_parent_offset;
4747
4748 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4749 assert(loader != nullptr, "loader must not be null");
4750 assert(oopDesc::is_oop(loader), "loader must be oop");
4751 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4752 }
4753
4754 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4755 assert(loader != nullptr, "loader must not be null");
4756 assert(oopDesc::is_oop(loader), "loader must be oop");
4757 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4758 }
4759
4760 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4761 assert(loader != nullptr, "loader must not be null");
4762 assert(oopDesc::is_oop(loader), "loader must be oop");
4763 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4764 }
4765
4766 #define CLASSLOADER_FIELDS_DO(macro) \
4767 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4768 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4769 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4770 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4771 macro(_parent_offset, k1, "parent", classloader_signature, false)
4772
4773 void java_lang_ClassLoader::compute_offsets() {
4774 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4775 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4776
4777 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4778 }
4779
4780 #if INCLUDE_CDS
4781 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4782 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4783 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4784 }
4785 #endif
4786
4787 oop java_lang_ClassLoader::parent(oop loader) {
4788 assert(is_instance(loader), "loader must be oop");
4789 return loader->obj_field(_parent_offset);
4790 }
4791
4792 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4793 assert(is_instance(loader), "loader must be oop");
4794 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4795 }
4796
4797 // Returns the name field of this class loader. If the name field has not
4798 // been set, null will be returned.
4799 oop java_lang_ClassLoader::name(oop loader) {
4800 assert(is_instance(loader), "loader must be oop");
4801 return loader->obj_field(_name_offset);
4802 }
4803
4804 // Returns the nameAndId field of this class loader. The format is
4805 // as follows:
4806 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4807 // If the defining loader has no name then <qualified-class-name> @<id>
4808 // If built-in loader, then omit '@<id>' as there is only one instance.
4809 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4810 oop java_lang_ClassLoader::nameAndId(oop loader) {
4811 assert(is_instance(loader), "loader must be oop");
4812 return loader->obj_field(_nameAndId_offset);
4813 }
4814
4815 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4816 assert(is_instance(loader), "loader must be oop");
4817 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4818 oop acl = loader;
4819 debug_only(jint loop_count = 0);
4820 // This loop taken verbatim from ClassLoader.java:
4821 do {
4822 acl = parent(acl);
4823 if (cl == acl) {
4824 return true;
4825 }
4826 assert(++loop_count > 0, "loop_count overflow");
4827 } while (acl != nullptr);
4828 return false;
4829 }
4830
4831 bool java_lang_ClassLoader::is_instance(oop obj) {
4832 return obj != nullptr && is_subclass(obj->klass());
4833 }
4834
4835
4836 // For class loader classes, parallelCapable defined
4837 // based on non-null field
4838 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4839 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4840 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4841 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4842 }
4843
4844 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4845 // Fix for 4474172; see evaluation for more details
4846 loader = non_reflection_class_loader(loader);
4847
4848 oop cl = SystemDictionary::java_system_loader();
4849 while(cl != nullptr) {
4850 if (cl == loader) return true;
4851 cl = parent(cl);
4852 }
4853 return false;
4854 }
4855
4856 // Return true if this is one of the class loaders associated with
4857 // the generated bytecodes for serialization constructor returned
4858 // by sun.reflect.ReflectionFactory::newConstructorForSerialization
4859 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4860 if (loader != nullptr) {
4861 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass();
4862 // This might be null in non-1.4 JDKs
4863 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class));
4864 }
4865 return false;
4866 }
4867
4868 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4869 // See whether this is one of the class loaders associated with
4870 // the generated bytecodes for reflection, and if so, "magically"
4871 // delegate to its parent to prevent class loading from occurring
4872 // in places where applications using reflection didn't expect it.
4873 if (is_reflection_class_loader(loader)) {
4874 return parent(loader);
4875 }
4876 return loader;
4877 }
4878
4879 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4880 assert(is_instance(loader), "loader must be oop");
4881 return loader->obj_field(_unnamedModule_offset);
4882 }
4883
4884 // Support for java_lang_System
4885 //
4886
4887 int java_lang_System::_static_in_offset;
4888 int java_lang_System::_static_out_offset;
4889 int java_lang_System::_static_err_offset;
4890 int java_lang_System::_static_security_offset;
4891 int java_lang_System::_static_allow_security_offset;
4892 int java_lang_System::_static_never_offset;
4893
4894 #define SYSTEM_FIELDS_DO(macro) \
4895 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4896 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4897 macro(_static_err_offset, k, "err", print_stream_signature, true); \
4898 macro(_static_security_offset, k, "security", security_manager_signature, true); \
4899 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4900 macro(_static_never_offset, k, "NEVER", int_signature, true)
4901
4902 void java_lang_System::compute_offsets() {
4903 InstanceKlass* k = vmClasses::System_klass();
4904 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4905 }
4906
4907 // This field tells us that a security manager can never be installed so we
4908 // can completely skip populating the ProtectionDomainCacheTable.
4909 bool java_lang_System::allow_security_manager() {
4910 static int initialized = false;
4911 static bool allowed = true; // default
4912 if (!initialized) {
4913 oop base = vmClasses::System_klass()->static_field_base_raw();
4914 int never = base->int_field(_static_never_offset);
4915 allowed = (base->int_field(_static_allow_security_offset) != never);
4916 initialized = true;
4917 }
4918 return allowed;
4919 }
4920
4921 // This field tells us that a security manager is installed.
4922 bool java_lang_System::has_security_manager() {
4923 oop base = vmClasses::System_klass()->static_field_base_raw();
4924 return base->obj_field(_static_security_offset) != nullptr;
4925 }
4926
4927 #if INCLUDE_CDS
4928 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4929 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4930 }
4931 #endif
4932
4933 // Support for jdk_internal_misc_UnsafeConstants
4934 //
4935 class UnsafeConstantsFixup : public FieldClosure {
4936 private:
4937 int _address_size;
4938 int _page_size;
4939 bool _big_endian;
4940 bool _use_unaligned_access;
4941 int _data_cache_line_flush_size;
4942 public:
4943 UnsafeConstantsFixup() {
4944 // round up values for all static final fields
4945 _address_size = sizeof(void*);
4946 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4947 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4948 _use_unaligned_access = UseUnalignedAccesses;
4949 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4950 }
4951
4952 void do_field(fieldDescriptor* fd) {
4953 oop mirror = fd->field_holder()->java_mirror();
4954 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4955 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4956 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4957 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4958 if (fd->name() == vmSymbols::address_size_name()) {
4959 mirror->int_field_put(fd->offset(), _address_size);
4960 } else if (fd->name() == vmSymbols::page_size_name()) {
4961 mirror->int_field_put(fd->offset(), _page_size);
4962 } else if (fd->name() == vmSymbols::big_endian_name()) {
4963 mirror->bool_field_put(fd->offset(), _big_endian);
4964 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4965 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4966 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4967 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4968 } else {
4969 assert(false, "unexpected UnsafeConstants field");
4970 }
4971 }
4972 };
4973
4974 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4975 UnsafeConstantsFixup fixup;
4976 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4977 }
4978
4979
4980 // java_lang_StackTraceElement
4981
4982 int java_lang_StackTraceElement::_methodName_offset;
4983 int java_lang_StackTraceElement::_fileName_offset;
4984 int java_lang_StackTraceElement::_lineNumber_offset;
4985 int java_lang_StackTraceElement::_moduleName_offset;
4986 int java_lang_StackTraceElement::_moduleVersion_offset;
4987 int java_lang_StackTraceElement::_classLoaderName_offset;
4988 int java_lang_StackTraceElement::_declaringClass_offset;
4989 int java_lang_StackTraceElement::_declaringClassObject_offset;
4990
4991 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4992 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4993 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4994 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4995 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4996 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4997 macro(_methodName_offset, k, "methodName", string_signature, false); \
4998 macro(_fileName_offset, k, "fileName", string_signature, false); \
4999 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
5000
5001 // Support for java_lang_StackTraceElement
5002 void java_lang_StackTraceElement::compute_offsets() {
5003 InstanceKlass* k = vmClasses::StackTraceElement_klass();
5004 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5005 }
5006
5007 #if INCLUDE_CDS
5008 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
5009 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5010 }
5011 #endif
5012
5013 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
5014 element->obj_field_put(_fileName_offset, value);
5015 }
5016
5017 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
5018 element->obj_field_put(_declaringClass_offset, value);
5019 }
5020
5021 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5022 element->obj_field_put(_methodName_offset, value);
5023 }
5024
5025 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5026 element->int_field_put(_lineNumber_offset, value);
5027 }
5028
5029 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5030 element->obj_field_put(_moduleName_offset, value);
5031 }
5032
5033 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5034 element->obj_field_put(_moduleVersion_offset, value);
5035 }
5036
5037 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5038 element->obj_field_put(_classLoaderName_offset, value);
5039 }
5040
5041 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5042 element->obj_field_put(_declaringClassObject_offset, value);
5043 }
5044
5045
5046 // java_lang_AssertionStatusDirectives
5047
5048 int java_lang_AssertionStatusDirectives::_classes_offset;
5049 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5050 int java_lang_AssertionStatusDirectives::_packages_offset;
5051 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5052 int java_lang_AssertionStatusDirectives::_deflt_offset;
5053
5054 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5055 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5056 macro(_classes_offset, k, "classes", string_array_signature, false); \
5057 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
5058 macro(_packages_offset, k, "packages", string_array_signature, false); \
5059 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
5060 macro(_deflt_offset, k, "deflt", bool_signature, false)
5061
5062 void java_lang_AssertionStatusDirectives::compute_offsets() {
5063 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5064 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5065 }
5066
5067 #if INCLUDE_CDS
5068 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5069 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5070 }
5071 #endif
5072
5073 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5074 o->obj_field_put(_classes_offset, val);
5075 }
5076
5077 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5078 o->obj_field_put(_classEnabled_offset, val);
5079 }
5080
5081 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5082 o->obj_field_put(_packages_offset, val);
5083 }
5084
5085 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5086 o->obj_field_put(_packageEnabled_offset, val);
5087 }
5088
5089 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5090 o->bool_field_put(_deflt_offset, val);
5091 }
5092
5093 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5094
5095 #define AOS_FIELDS_DO(macro) \
5096 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5097
5098 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5099 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5100 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5101 }
5102
5103 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5104 assert(_owner_offset != 0, "Must be initialized");
5105 return obj->obj_field(_owner_offset);
5106 }
5107
5108 #if INCLUDE_CDS
5109 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5110 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5111 }
5112 #endif
5113
5114 int vector_VectorPayload::_payload_offset;
5115
5116 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5117 macro(_payload_offset, k, "payload", object_signature, false)
5118
5119 void vector_VectorPayload::compute_offsets() {
5120 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5121 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5122 }
5123
5124 #if INCLUDE_CDS
5125 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5126 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5127 }
5128 #endif
5129
5130 void vector_VectorPayload::set_payload(oop o, oop val) {
5131 o->obj_field_put(_payload_offset, val);
5132 }
5133
5134 bool vector_VectorPayload::is_instance(oop obj) {
5135 return obj != nullptr && is_subclass(obj->klass());
5136 }
5137
5138 int java_lang_Integer_IntegerCache::_static_cache_offset;
5139 int java_lang_Long_LongCache::_static_cache_offset;
5140 int java_lang_Character_CharacterCache::_static_cache_offset;
5141 int java_lang_Short_ShortCache::_static_cache_offset;
5142 int java_lang_Byte_ByteCache::_static_cache_offset;
5143
5144 #define INTEGER_CACHE_FIELDS_DO(macro) \
5145 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5146
5147 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5148 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5149 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5150 }
5151
5152 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5153 oop base = ik->static_field_base_raw();
5154 return objArrayOop(base->obj_field(_static_cache_offset));
5155 }
5156
5157 Symbol* java_lang_Integer_IntegerCache::symbol() {
5158 return vmSymbols::java_lang_Integer_IntegerCache();
5159 }
5160
5161 #if INCLUDE_CDS
5162 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5163 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5164 }
5165 #endif
5166 #undef INTEGER_CACHE_FIELDS_DO
5167
5168 jint java_lang_Integer::value(oop obj) {
5169 jvalue v;
5170 java_lang_boxing_object::get_value(obj, &v);
5171 return v.i;
5172 }
5173
5174 #define LONG_CACHE_FIELDS_DO(macro) \
5175 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5176
5177 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5178 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5179 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5180 }
5181
5182 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5183 oop base = ik->static_field_base_raw();
5184 return objArrayOop(base->obj_field(_static_cache_offset));
5185 }
5186
5187 Symbol* java_lang_Long_LongCache::symbol() {
5188 return vmSymbols::java_lang_Long_LongCache();
5189 }
5190
5191 #if INCLUDE_CDS
5192 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5193 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5194 }
5195 #endif
5196 #undef LONG_CACHE_FIELDS_DO
5197
5198 jlong java_lang_Long::value(oop obj) {
5199 jvalue v;
5200 java_lang_boxing_object::get_value(obj, &v);
5201 return v.j;
5202 }
5203
5204 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5205 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5206
5207 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5208 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5209 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5210 }
5211
5212 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5213 oop base = ik->static_field_base_raw();
5214 return objArrayOop(base->obj_field(_static_cache_offset));
5215 }
5216
5217 Symbol* java_lang_Character_CharacterCache::symbol() {
5218 return vmSymbols::java_lang_Character_CharacterCache();
5219 }
5220
5221 #if INCLUDE_CDS
5222 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5223 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5224 }
5225 #endif
5226 #undef CHARACTER_CACHE_FIELDS_DO
5227
5228 jchar java_lang_Character::value(oop obj) {
5229 jvalue v;
5230 java_lang_boxing_object::get_value(obj, &v);
5231 return v.c;
5232 }
5233
5234 #define SHORT_CACHE_FIELDS_DO(macro) \
5235 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5236
5237 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5238 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5239 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5240 }
5241
5242 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5243 oop base = ik->static_field_base_raw();
5244 return objArrayOop(base->obj_field(_static_cache_offset));
5245 }
5246
5247 Symbol* java_lang_Short_ShortCache::symbol() {
5248 return vmSymbols::java_lang_Short_ShortCache();
5249 }
5250
5251 #if INCLUDE_CDS
5252 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5253 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5254 }
5255 #endif
5256 #undef SHORT_CACHE_FIELDS_DO
5257
5258 jshort java_lang_Short::value(oop obj) {
5259 jvalue v;
5260 java_lang_boxing_object::get_value(obj, &v);
5261 return v.s;
5262 }
5263
5264 #define BYTE_CACHE_FIELDS_DO(macro) \
5265 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5266
5267 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5268 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5269 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5270 }
5271
5272 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5273 oop base = ik->static_field_base_raw();
5274 return objArrayOop(base->obj_field(_static_cache_offset));
5275 }
5276
5277 Symbol* java_lang_Byte_ByteCache::symbol() {
5278 return vmSymbols::java_lang_Byte_ByteCache();
5279 }
5280
5281 #if INCLUDE_CDS
5282 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5283 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5284 }
5285 #endif
5286 #undef BYTE_CACHE_FIELDS_DO
5287
5288 jbyte java_lang_Byte::value(oop obj) {
5289 jvalue v;
5290 java_lang_boxing_object::get_value(obj, &v);
5291 return v.b;
5292 }
5293
5294 int java_lang_Boolean::_static_TRUE_offset;
5295 int java_lang_Boolean::_static_FALSE_offset;
5296
5297 #define BOOLEAN_FIELDS_DO(macro) \
5298 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5299 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5300
5301
5302 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5303 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5304 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5305 }
5306
5307 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5308 oop base = ik->static_field_base_raw();
5309 return base->obj_field(_static_TRUE_offset);
5310 }
5311
5312 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5313 oop base = ik->static_field_base_raw();
5314 return base->obj_field(_static_FALSE_offset);
5315 }
5316
5317 Symbol* java_lang_Boolean::symbol() {
5318 return vmSymbols::java_lang_Boolean();
5319 }
5320
5321 #if INCLUDE_CDS
5322 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5323 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5324 }
5325 #endif
5326 #undef BOOLEAN_CACHE_FIELDS_DO
5327
5328 jboolean java_lang_Boolean::value(oop obj) {
5329 jvalue v;
5330 java_lang_boxing_object::get_value(obj, &v);
5331 return v.z;
5332 }
5333
5334 // java_lang_reflect_RecordComponent
5335
5336 int java_lang_reflect_RecordComponent::_clazz_offset;
5337 int java_lang_reflect_RecordComponent::_name_offset;
5338 int java_lang_reflect_RecordComponent::_type_offset;
5339 int java_lang_reflect_RecordComponent::_accessor_offset;
5340 int java_lang_reflect_RecordComponent::_signature_offset;
5341 int java_lang_reflect_RecordComponent::_annotations_offset;
5342 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5343
5344 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5345 macro(_clazz_offset, k, "clazz", class_signature, false); \
5346 macro(_name_offset, k, "name", string_signature, false); \
5347 macro(_type_offset, k, "type", class_signature, false); \
5348 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5349 macro(_signature_offset, k, "signature", string_signature, false); \
5350 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5351 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5352
5353 // Support for java_lang_reflect_RecordComponent
5354 void java_lang_reflect_RecordComponent::compute_offsets() {
5355 InstanceKlass* k = vmClasses::RecordComponent_klass();
5356 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5357 }
5358
5359 #if INCLUDE_CDS
5360 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5361 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5362 }
5363 #endif
5364
5365 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5366 element->obj_field_put(_clazz_offset, value);
5367 }
5368
5369 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5370 element->obj_field_put(_name_offset, value);
5371 }
5372
5373 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5374 element->obj_field_put(_type_offset, value);
5375 }
5376
5377 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5378 element->obj_field_put(_accessor_offset, value);
5379 }
5380
5381 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5382 element->obj_field_put(_signature_offset, value);
5383 }
5384
5385 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5386 element->obj_field_put(_annotations_offset, value);
5387 }
5388
5389 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5390 element->obj_field_put(_typeAnnotations_offset, value);
5391 }
5392
5393 // java_lang_InternalError
5394 int java_lang_InternalError::_during_unsafe_access_offset;
5395
5396 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5397 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5398 }
5399
5400 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5401 return internal_error->bool_field(_during_unsafe_access_offset);
5402 }
5403
5404 void java_lang_InternalError::compute_offsets() {
5405 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5406 }
5407
5408 #if INCLUDE_CDS
5409 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5410 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5411 }
5412 #endif
5413
5414 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5415 f(java_lang_Class) \
5416 f(java_lang_String) \
5417 f(java_lang_ref_Reference) \
5418 //end
5419
5420 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5421 f(java_lang_System) \
5422 f(java_lang_ClassLoader) \
5423 f(java_lang_Throwable) \
5424 f(java_lang_Thread) \
5425 f(java_lang_Thread_FieldHolder) \
5426 f(java_lang_Thread_Constants) \
5427 f(java_lang_ThreadGroup) \
5428 f(java_lang_VirtualThread) \
5429 f(java_lang_InternalError) \
5430 f(java_lang_AssertionStatusDirectives) \
5431 f(java_lang_ref_SoftReference) \
5432 f(java_lang_invoke_MethodHandle) \
5433 f(java_lang_invoke_DirectMethodHandle) \
5434 f(java_lang_invoke_MemberName) \
5435 f(java_lang_invoke_ResolvedMethodName) \
5436 f(java_lang_invoke_LambdaForm) \
5437 f(java_lang_invoke_MethodType) \
5438 f(java_lang_invoke_CallSite) \
5439 f(java_lang_invoke_ConstantCallSite) \
5440 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5441 f(java_security_AccessControlContext) \
5442 f(java_lang_reflect_AccessibleObject) \
5443 f(java_lang_reflect_Method) \
5444 f(java_lang_reflect_Constructor) \
5445 f(java_lang_reflect_Field) \
5446 f(java_lang_reflect_RecordComponent) \
5447 f(reflect_ConstantPool) \
5448 f(java_lang_reflect_Parameter) \
5449 f(java_lang_Module) \
5450 f(java_lang_StackTraceElement) \
5451 f(java_lang_ClassFrameInfo) \
5452 f(java_lang_StackFrameInfo) \
5453 f(java_lang_LiveStackFrameInfo) \
5454 f(jdk_internal_vm_ContinuationScope) \
5455 f(jdk_internal_vm_Continuation) \
5456 f(jdk_internal_vm_StackChunk) \
5457 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5458 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5459 f(jdk_internal_foreign_abi_ABIDescriptor) \
5460 f(jdk_internal_foreign_abi_VMStorage) \
5461 f(jdk_internal_foreign_abi_CallConv) \
5462 f(jdk_internal_misc_UnsafeConstants) \
5463 f(java_lang_boxing_object) \
5464 f(vector_VectorPayload) \
5465 //end
5466
5467 #define BASIC_JAVA_CLASSES_DO(f) \
5468 BASIC_JAVA_CLASSES_DO_PART1(f) \
5469 BASIC_JAVA_CLASSES_DO_PART2(f)
5470
5471 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5472
5473 // Compute field offsets of all the classes in this file
5474 void JavaClasses::compute_offsets() {
5475 if (CDSConfig::is_using_archive()) {
5476 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5477 JvmtiExport::has_early_class_hook_env()),
5478 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5479 // None of the classes used by the rest of this function can be replaced by
5480 // JVMTI ClassFileLoadHook.
5481 // We are safe to use the archived offsets, which have already been restored
5482 // by JavaClasses::serialize_offsets, without computing the offsets again.
5483 return;
5484 }
5485
5486 // We have already called the compute_offsets() of the
5487 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5488 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5489 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5490 }
5491
5492 #if INCLUDE_CDS
5493 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5494
5495 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5496 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5497 }
5498 #endif
5499
5500 #if INCLUDE_CDS_JAVA_HEAP
5501 bool JavaClasses::is_supported_for_archiving(oop obj) {
5502 Klass* klass = obj->klass();
5503
5504 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed.
5505 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5506 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5507 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5508 // So for now we cannot not support these classes for archiving.
5509 //
5510 // These objects typically are not referenced by static fields, but rather by resolved
5511 // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5512 klass == vmClasses::ResolvedMethodName_klass() ||
5513 klass == vmClasses::MemberName_klass() ||
5514 klass == vmClasses::Context_klass() ||
5515 // It's problematic to archive Reference objects. One of the reasons is that
5516 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5517 klass->is_subclass_of(vmClasses::Reference_klass())) {
5518 return false;
5519 }
5520
5521 return true;
5522 }
5523 #endif
5524
5525 #ifndef PRODUCT
5526
5527 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5528
5529 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5530 const char* field_sig) {
5531 EXCEPTION_MARK;
5532 fieldDescriptor fd;
5533 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5534 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5535 InstanceKlass* ik = InstanceKlass::cast(k);
5536 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5537 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5538 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5539 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5540 return false;
5541 }
5542 if (fd.is_static()) {
5543 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5544 return false;
5545 }
5546 if (fd.offset() == deserialized_offset ) {
5547 return true;
5548 } else {
5549 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5550 klass_name, field_name, deserialized_offset, fd.offset());
5551 return false;
5552 }
5553 }
5554
5555 void JavaClasses::check_offsets() {
5556 bool valid = true;
5557
5558 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5559 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5560
5561 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5562 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5563
5564 // Boxed primitive objects (java_lang_boxing_object)
5565
5566 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5567 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5568 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5569 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5570 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5571 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5572 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5573 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5574
5575 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5576 }
5577
5578 #endif // PRODUCT
5579
5580 int InjectedField::compute_offset() {
5581 InstanceKlass* ik = InstanceKlass::cast(klass());
5582 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5583 if (!may_be_java && !fs.field_flags().is_injected()) {
5584 // Only look at injected fields
5585 continue;
5586 }
5587 if (fs.name() == name() && fs.signature() == signature()) {
5588 return fs.offset();
5589 }
5590 }
5591 ResourceMark rm;
5592 tty->print_cr("Invalid layout of %s at %s/%s%s", ik->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : "");
5593 #ifndef PRODUCT
5594 ik->print();
5595 tty->print_cr("all fields:");
5596 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5597 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5598 }
5599 #endif //PRODUCT
5600 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5601 return -1;
5602 }
5603
5604 void javaClasses_init() {
5605 JavaClasses::compute_offsets();
5606 JavaClasses::check_offsets();
5607 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5608 }