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 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1690 }
1691
1692 int java_lang_Thread::is_in_VTMS_transition_offset() {
1693 return _jvmti_is_in_VTMS_transition_offset;
1694 }
1695
1696 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1697 assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1698 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1699 }
1700
1701 oop java_lang_Thread::holder(oop java_thread) {
1702 // Note: may return null if the thread is still attaching
1703 return java_thread->obj_field(_holder_offset);
1704 }
1705 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1706 return java_thread->obj_field(_interruptLock_offset);
1707 }
1708
1709 bool java_lang_Thread::interrupted(oop java_thread) {
1710 // Make sure the caller can safely access oops.
1711 assert(Thread::current()->is_VM_thread() ||
1712 (JavaThread::current()->thread_state() != _thread_blocked &&
1713 JavaThread::current()->thread_state() != _thread_in_native),
1714 "Unsafe access to oop");
1715 return java_thread->bool_field_volatile(_interrupted_offset);
1716 }
1717
1718 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1719 // Make sure the caller can safely access oops.
1720 assert(Thread::current()->is_VM_thread() ||
1721 (JavaThread::current()->thread_state() != _thread_blocked &&
1722 JavaThread::current()->thread_state() != _thread_in_native),
1723 "Unsafe access to oop");
1724 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1725 }
1726
1727
1728 oop java_lang_Thread::name(oop java_thread) {
1729 return java_thread->obj_field(_name_offset);
1730 }
1731
1732
1733 void java_lang_Thread::set_name(oop java_thread, oop name) {
1734 java_thread->obj_field_put(_name_offset, name);
1735 }
1736
1737 // Convenience macros for setting and getting Thread fields that
1738 // are actually stored in the FieldHolder object of the thread.
1739 // The FieldHolder can be null whilst a thread is attaching via
1740 // JNI, and when the main thread is attaching.
1741
1742 // The default value should be the default/zero initialized value
1743 // of the field as it would be in java.lang.Thread.FieldHolder.
1744 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \
1745 { \
1746 oop holder = java_lang_Thread::holder(java_thread); \
1747 if (holder != nullptr) \
1748 return java_lang_Thread_FieldHolder::field(holder); \
1749 else \
1750 return default_val; \
1751 }
1752
1753 // We should never be trying to set a field of an attaching thread.
1754 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \
1755 { \
1756 oop holder = java_lang_Thread::holder(java_thread); \
1757 assert(holder != nullptr, "Thread not fully initialized"); \
1758 java_lang_Thread_FieldHolder::set_##field(holder, value); \
1759 }
1760
1761
1762 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1763 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1764 }
1765
1766
1767 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1768 SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1769 }
1770
1771
1772 oop java_lang_Thread::threadGroup(oop java_thread) {
1773 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1774 }
1775
1776
1777 bool java_lang_Thread::is_alive(oop java_thread) {
1778 JavaThread* thr = java_lang_Thread::thread(java_thread);
1779 return (thr != nullptr);
1780 }
1781
1782
1783 bool java_lang_Thread::is_daemon(oop java_thread) {
1784 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1785 }
1786
1787
1788 void java_lang_Thread::set_daemon(oop java_thread) {
1789 SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1790 }
1791
1792 oop java_lang_Thread::context_class_loader(oop java_thread) {
1793 return java_thread->obj_field(_contextClassLoader_offset);
1794 }
1795
1796 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1797 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1798 }
1799
1800
1801 jlong java_lang_Thread::stackSize(oop java_thread) {
1802 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1803 }
1804
1805 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1806 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1807 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1808 }
1809
1810 // Read thread status value from threadStatus field in java.lang.Thread java class.
1811 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1812 // Make sure the caller is operating on behalf of the VM or is
1813 // running VM code (state == _thread_in_vm).
1814 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1815 JavaThread::current()->thread_state() == _thread_in_vm,
1816 "Java Thread is not running in vm");
1817 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1818 }
1819
1820 ByteSize java_lang_Thread::thread_id_offset() {
1821 return in_ByteSize(_tid_offset);
1822 }
1823
1824 oop java_lang_Thread::park_blocker(oop java_thread) {
1825 return java_thread->obj_field(_park_blocker_offset);
1826 }
1827
1828 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1829 ThreadsListHandle tlh(JavaThread::current());
1830 JavaThread* thread;
1831 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1832 if (is_virtual) {
1833 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1834 if (carrier_thread == nullptr) {
1835 return nullptr;
1836 }
1837 thread = java_lang_Thread::thread(carrier_thread);
1838 } else {
1839 thread = java_lang_Thread::thread(java_thread);
1840 }
1841 if (thread == nullptr) {
1842 return nullptr;
1843 }
1844
1845 class GetStackTraceClosure : public HandshakeClosure {
1846 public:
1847 const Handle _java_thread;
1848 int _depth;
1849 bool _retry_handshake;
1850 GrowableArray<Method*>* _methods;
1851 GrowableArray<int>* _bcis;
1852
1853 GetStackTraceClosure(Handle java_thread) :
1854 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1855 _methods(nullptr), _bcis(nullptr) {
1856 }
1857 ~GetStackTraceClosure() {
1858 delete _methods;
1859 delete _bcis;
1860 }
1861
1862 bool read_reset_retry() {
1863 bool ret = _retry_handshake;
1864 // If we re-execute the handshake this method need to return false
1865 // when the handshake cannot be performed. (E.g. thread terminating)
1866 _retry_handshake = false;
1867 return ret;
1868 }
1869
1870 void do_thread(Thread* th) {
1871 if (!Thread::current()->is_Java_thread()) {
1872 _retry_handshake = true;
1873 return;
1874 }
1875
1876 JavaThread* thread = JavaThread::cast(th);
1877
1878 if (!thread->has_last_Java_frame()) {
1879 return;
1880 }
1881
1882 bool carrier = false;
1883 if (java_lang_VirtualThread::is_instance(_java_thread())) {
1884 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1885 const ContinuationEntry* ce = thread->vthread_continuation();
1886 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1887 return; // not mounted
1888 }
1889 } else {
1890 carrier = (thread->vthread_continuation() != nullptr);
1891 }
1892
1893 const int max_depth = MaxJavaStackTraceDepth;
1894 const bool skip_hidden = !ShowHiddenFrames;
1895
1896 // Pick minimum length that will cover most cases
1897 int init_length = 64;
1898 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1899 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1900
1901 int total_count = 0;
1902 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1903 !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1904 vfst.next()) {
1905
1906 if (skip_hidden && (vfst.method()->is_hidden() ||
1907 vfst.method()->is_continuation_enter_intrinsic())) {
1908 continue;
1909 }
1910
1911 _methods->push(vfst.method());
1912 _bcis->push(vfst.bci());
1913 total_count++;
1914 }
1915
1916 _depth = total_count;
1917 }
1918 };
1919
1920 // Handshake with target
1921 ResourceMark rm(THREAD);
1922 HandleMark hm(THREAD);
1923 GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1924 do {
1925 Handshake::execute(&gstc, &tlh, thread);
1926 } while (gstc.read_reset_retry());
1927
1928 // Stop if no stack trace is found.
1929 if (gstc._depth == 0) {
1930 return nullptr;
1931 }
1932
1933 // Convert to StackTraceElement array
1934 InstanceKlass* k = vmClasses::StackTraceElement_klass();
1935 assert(k != nullptr, "must be loaded in 1.4+");
1936 if (k->should_be_initialized()) {
1937 k->initialize(CHECK_NULL);
1938 }
1939 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1940
1941 for (int i = 0; i < gstc._depth; i++) {
1942 methodHandle method(THREAD, gstc._methods->at(i));
1943 oop element = java_lang_StackTraceElement::create(method,
1944 gstc._bcis->at(i),
1945 CHECK_NULL);
1946 trace->obj_at_put(i, element);
1947 }
1948
1949 return trace();
1950 }
1951
1952 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1953 JavaThreadStatus status = get_thread_status(java_thread);
1954 switch (status) {
1955 case JavaThreadStatus::NEW : return "NEW";
1956 case JavaThreadStatus::RUNNABLE : return "RUNNABLE";
1957 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)";
1958 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1959 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1960 case JavaThreadStatus::PARKED : return "WAITING (parking)";
1961 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)";
1962 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1963 case JavaThreadStatus::TERMINATED : return "TERMINATED";
1964 default : return "UNKNOWN";
1965 };
1966 }
1967 int java_lang_ThreadGroup::_parent_offset;
1968 int java_lang_ThreadGroup::_name_offset;
1969 int java_lang_ThreadGroup::_maxPriority_offset;
1970 int java_lang_ThreadGroup::_daemon_offset;
1971
1972 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1973 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1974 return java_thread_group->obj_field(_parent_offset);
1975 }
1976
1977 // ("name as oop" accessor is not necessary)
1978
1979 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1980 oop name = java_thread_group->obj_field(_name_offset);
1981 // ThreadGroup.name can be null
1982 if (name != nullptr) {
1983 return java_lang_String::as_utf8_string(name);
1984 }
1985 return nullptr;
1986 }
1987
1988 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1989 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1990 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1991 }
1992
1993 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1994 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1995 return java_thread_group->bool_field(_daemon_offset) != 0;
1996 }
1997
1998 #define THREADGROUP_FIELDS_DO(macro) \
1999 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
2000 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
2001 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
2002 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false);
2003
2004 void java_lang_ThreadGroup::compute_offsets() {
2005 assert(_parent_offset == 0, "offsets should be initialized only once");
2006
2007 InstanceKlass* k = vmClasses::ThreadGroup_klass();
2008 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2009 }
2010
2011 #if INCLUDE_CDS
2012 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2013 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2014 }
2015 #endif
2016
2017
2018 // java_lang_VirtualThread
2019
2020 int java_lang_VirtualThread::static_vthread_scope_offset;
2021 int java_lang_VirtualThread::_carrierThread_offset;
2022 int java_lang_VirtualThread::_continuation_offset;
2023 int java_lang_VirtualThread::_state_offset;
2024
2025 #define VTHREAD_FIELDS_DO(macro) \
2026 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \
2027 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \
2028 macro(_continuation_offset, k, "cont", continuation_signature, false); \
2029 macro(_state_offset, k, "state", int_signature, false)
2030
2031
2032 void java_lang_VirtualThread::compute_offsets() {
2033 InstanceKlass* k = vmClasses::VirtualThread_klass();
2034 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2035 }
2036
2037 bool java_lang_VirtualThread::is_instance(oop obj) {
2038 return obj != nullptr && is_subclass(obj->klass());
2039 }
2040
2041 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2042 oop thread = vthread->obj_field(_carrierThread_offset);
2043 return thread;
2044 }
2045
2046 oop java_lang_VirtualThread::continuation(oop vthread) {
2047 oop cont = vthread->obj_field(_continuation_offset);
2048 return cont;
2049 }
2050
2051 int java_lang_VirtualThread::state(oop vthread) {
2052 return vthread->int_field_acquire(_state_offset);
2053 }
2054
2055 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2056 JavaThreadStatus status = JavaThreadStatus::NEW;
2057 switch (state & ~SUSPENDED) {
2058 case NEW:
2059 status = JavaThreadStatus::NEW;
2060 break;
2061 case STARTED:
2062 case RUNNING:
2063 case PARKING:
2064 case TIMED_PARKING:
2065 case UNPARKED:
2066 case YIELDING:
2067 case YIELDED:
2068 status = JavaThreadStatus::RUNNABLE;
2069 break;
2070 case PARKED:
2071 case PINNED:
2072 status = JavaThreadStatus::PARKED;
2073 break;
2074 case TIMED_PARKED:
2075 case TIMED_PINNED:
2076 status = JavaThreadStatus::PARKED_TIMED;
2077 break;
2078 case TERMINATED:
2079 status = JavaThreadStatus::TERMINATED;
2080 break;
2081 default:
2082 ShouldNotReachHere();
2083 }
2084 return status;
2085 }
2086
2087 #if INCLUDE_CDS
2088 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2089 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2090 }
2091 #endif
2092
2093 // java_lang_Throwable
2094
2095 int java_lang_Throwable::_backtrace_offset;
2096 int java_lang_Throwable::_detailMessage_offset;
2097 int java_lang_Throwable::_stackTrace_offset;
2098 int java_lang_Throwable::_depth_offset;
2099 int java_lang_Throwable::_cause_offset;
2100 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2101
2102 #define THROWABLE_FIELDS_DO(macro) \
2103 macro(_backtrace_offset, k, "backtrace", object_signature, false); \
2104 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \
2105 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
2106 macro(_depth_offset, k, "depth", int_signature, false); \
2107 macro(_cause_offset, k, "cause", throwable_signature, false); \
2108 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2109
2110 void java_lang_Throwable::compute_offsets() {
2111 InstanceKlass* k = vmClasses::Throwable_klass();
2112 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2113 }
2114
2115 #if INCLUDE_CDS
2116 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2117 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2118 }
2119 #endif
2120
2121 oop java_lang_Throwable::unassigned_stacktrace() {
2122 InstanceKlass* ik = vmClasses::Throwable_klass();
2123 oop base = ik->static_field_base_raw();
2124 return base->obj_field(_static_unassigned_stacktrace_offset);
2125 }
2126
2127 oop java_lang_Throwable::backtrace(oop throwable) {
2128 return throwable->obj_field_acquire(_backtrace_offset);
2129 }
2130
2131
2132 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2133 throwable->release_obj_field_put(_backtrace_offset, value);
2134 }
2135
2136 int java_lang_Throwable::depth(oop throwable) {
2137 return throwable->int_field(_depth_offset);
2138 }
2139
2140 void java_lang_Throwable::set_depth(oop throwable, int value) {
2141 throwable->int_field_put(_depth_offset, value);
2142 }
2143
2144 oop java_lang_Throwable::message(oop throwable) {
2145 return throwable->obj_field(_detailMessage_offset);
2146 }
2147
2148 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2149 oop msg = java_lang_Throwable::message(throwable);
2150 const char* msg_utf8 = nullptr;
2151 if (msg != nullptr) {
2152 msg_utf8 = java_lang_String::as_utf8_string(msg);
2153 }
2154 return msg_utf8;
2155 }
2156
2157 oop java_lang_Throwable::cause(oop throwable) {
2158 return throwable->obj_field(_cause_offset);
2159 }
2160
2161 void java_lang_Throwable::set_message(oop throwable, oop value) {
2162 throwable->obj_field_put(_detailMessage_offset, value);
2163 }
2164
2165
2166 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2167 throwable->obj_field_put(_stackTrace_offset, st_element_array);
2168 }
2169
2170 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2171 set_stacktrace(throwable, nullptr);
2172 }
2173
2174
2175 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2176 ResourceMark rm;
2177 Klass* k = throwable->klass();
2178 assert(k != nullptr, "just checking");
2179 st->print("%s", k->external_name());
2180 oop msg = message(throwable);
2181 if (msg != nullptr) {
2182 st->print(": %s", java_lang_String::as_utf8_string(msg));
2183 }
2184 }
2185
2186 // After this many redefines, the stack trace is unreliable.
2187 const int MAX_VERSION = USHRT_MAX;
2188
2189 static inline bool version_matches(Method* method, int version) {
2190 assert(version < MAX_VERSION, "version is too big");
2191 return method != nullptr && (method->constants()->version() == version);
2192 }
2193
2194 // This class provides a simple wrapper over the internal structure of
2195 // exception backtrace to insulate users of the backtrace from needing
2196 // to know what it looks like.
2197 // The code of this class is not GC safe. Allocations can only happen
2198 // in expand().
2199 class BacktraceBuilder: public StackObj {
2200 friend class BacktraceIterator;
2201 private:
2202 Handle _backtrace;
2203 objArrayOop _head;
2204 typeArrayOop _methods;
2205 typeArrayOop _bcis;
2206 objArrayOop _mirrors;
2207 typeArrayOop _names; // Needed to insulate method name against redefinition.
2208 // True if the top frame of the backtrace is omitted because it shall be hidden.
2209 bool _has_hidden_top_frame;
2210 int _index;
2211 NoSafepointVerifier _nsv;
2212
2213 enum {
2214 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2215 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2216 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2217 trace_names_offset = java_lang_Throwable::trace_names_offset,
2218 trace_conts_offset = java_lang_Throwable::trace_conts_offset,
2219 trace_next_offset = java_lang_Throwable::trace_next_offset,
2220 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2221 trace_size = java_lang_Throwable::trace_size,
2222 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2223 };
2224
2225 // get info out of chunks
2226 static typeArrayOop get_methods(objArrayHandle chunk) {
2227 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2228 assert(methods != nullptr, "method array should be initialized in backtrace");
2229 return methods;
2230 }
2231 static typeArrayOop get_bcis(objArrayHandle chunk) {
2232 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2233 assert(bcis != nullptr, "bci array should be initialized in backtrace");
2234 return bcis;
2235 }
2236 static objArrayOop get_mirrors(objArrayHandle chunk) {
2237 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2238 assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2239 return mirrors;
2240 }
2241 static typeArrayOop get_names(objArrayHandle chunk) {
2242 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2243 assert(names != nullptr, "names array should be initialized in backtrace");
2244 return names;
2245 }
2246 static bool has_hidden_top_frame(objArrayHandle chunk) {
2247 oop hidden = chunk->obj_at(trace_hidden_offset);
2248 return hidden != nullptr;
2249 }
2250
2251 public:
2252
2253 // constructor for new backtrace
2254 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2255 expand(CHECK);
2256 _backtrace = Handle(THREAD, _head);
2257 _index = 0;
2258 }
2259
2260 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2261 _methods = get_methods(backtrace);
2262 _bcis = get_bcis(backtrace);
2263 _mirrors = get_mirrors(backtrace);
2264 _names = get_names(backtrace);
2265 _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2266 assert(_methods->length() == _bcis->length() &&
2267 _methods->length() == _mirrors->length() &&
2268 _mirrors->length() == _names->length(),
2269 "method and source information arrays should match");
2270
2271 // head is the preallocated backtrace
2272 _head = backtrace();
2273 _backtrace = Handle(thread, _head);
2274 _index = 0;
2275 }
2276
2277 void expand(TRAPS) {
2278 objArrayHandle old_head(THREAD, _head);
2279 PauseNoSafepointVerifier pnsv(&_nsv);
2280
2281 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2282 objArrayHandle new_head(THREAD, head);
2283
2284 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2285 typeArrayHandle new_methods(THREAD, methods);
2286
2287 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2288 typeArrayHandle new_bcis(THREAD, bcis);
2289
2290 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2291 objArrayHandle new_mirrors(THREAD, mirrors);
2292
2293 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2294 typeArrayHandle new_names(THREAD, names);
2295
2296 if (!old_head.is_null()) {
2297 old_head->obj_at_put(trace_next_offset, new_head());
2298 }
2299 new_head->obj_at_put(trace_methods_offset, new_methods());
2300 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2301 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2302 new_head->obj_at_put(trace_names_offset, new_names());
2303 new_head->obj_at_put(trace_hidden_offset, nullptr);
2304
2305 _head = new_head();
2306 _methods = new_methods();
2307 _bcis = new_bcis();
2308 _mirrors = new_mirrors();
2309 _names = new_names();
2310 _index = 0;
2311 }
2312
2313 oop backtrace() {
2314 return _backtrace();
2315 }
2316
2317 inline void push(Method* method, int bci, TRAPS) {
2318 // Smear the -1 bci to 0 since the array only holds unsigned
2319 // shorts. The later line number lookup would just smear the -1
2320 // to a 0 even if it could be recorded.
2321 if (bci == SynchronizationEntryBCI) bci = 0;
2322
2323 if (_index >= trace_chunk_size) {
2324 methodHandle mhandle(THREAD, method);
2325 expand(CHECK);
2326 method = mhandle();
2327 }
2328
2329 _methods->ushort_at_put(_index, method->orig_method_idnum());
2330 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2331
2332 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2333 // klass owning the symbols alive so their refcounts aren't decremented.
2334 Symbol* name = method->name();
2335 _names->symbol_at_put(_index, name);
2336
2337 // We need to save the mirrors in the backtrace to keep the class
2338 // from being unloaded while we still have this stack trace.
2339 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2340 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2341
2342 _index++;
2343 }
2344
2345 void set_has_hidden_top_frame() {
2346 if (!_has_hidden_top_frame) {
2347 // It would be nice to add java/lang/Boolean::TRUE here
2348 // to indicate that this backtrace has a hidden top frame.
2349 // But this code is used before TRUE is allocated.
2350 // Therefore let's just use an arbitrary legal oop
2351 // available right here. _methods is a short[].
2352 assert(_methods != nullptr, "we need a legal oop");
2353 _has_hidden_top_frame = true;
2354 _head->obj_at_put(trace_hidden_offset, _methods);
2355 }
2356 }
2357 };
2358
2359 struct BacktraceElement : public StackObj {
2360 int _method_id;
2361 int _bci;
2362 int _version;
2363 Symbol* _name;
2364 Handle _mirror;
2365 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2366 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2367 };
2368
2369 class BacktraceIterator : public StackObj {
2370 int _index;
2371 objArrayHandle _result;
2372 objArrayHandle _mirrors;
2373 typeArrayHandle _methods;
2374 typeArrayHandle _bcis;
2375 typeArrayHandle _names;
2376
2377 void init(objArrayHandle result, Thread* thread) {
2378 // Get method id, bci, version and mirror from chunk
2379 _result = result;
2380 if (_result.not_null()) {
2381 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2382 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2383 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2384 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2385 _index = 0;
2386 }
2387 }
2388 public:
2389 BacktraceIterator(objArrayHandle result, Thread* thread) {
2390 init(result, thread);
2391 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2392 }
2393
2394 BacktraceElement next(Thread* thread) {
2395 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2396 _methods->ushort_at(_index),
2397 Backtrace::version_at(_bcis->int_at(_index)),
2398 Backtrace::bci_at(_bcis->int_at(_index)),
2399 _names->symbol_at(_index));
2400 _index++;
2401
2402 if (_index >= java_lang_Throwable::trace_chunk_size) {
2403 int next_offset = java_lang_Throwable::trace_next_offset;
2404 // Get next chunk
2405 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2406 init(result, thread);
2407 }
2408 return e;
2409 }
2410
2411 bool repeat() {
2412 return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2413 }
2414 };
2415
2416
2417 // Print stack trace element to resource allocated buffer
2418 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2419 int version, int bci, Symbol* name) {
2420 ResourceMark rm;
2421
2422 // Get strings and string lengths
2423 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2424 const char* klass_name = holder->external_name();
2425 int buf_len = (int)strlen(klass_name);
2426
2427 char* method_name = name->as_C_string();
2428 buf_len += (int)strlen(method_name);
2429
2430 char* source_file_name = nullptr;
2431 Symbol* source = Backtrace::get_source_file_name(holder, version);
2432 if (source != nullptr) {
2433 source_file_name = source->as_C_string();
2434 buf_len += (int)strlen(source_file_name);
2435 }
2436
2437 char *module_name = nullptr, *module_version = nullptr;
2438 ModuleEntry* module = holder->module();
2439 if (module->is_named()) {
2440 module_name = module->name()->as_C_string();
2441 buf_len += (int)strlen(module_name);
2442 if (module->version() != nullptr) {
2443 module_version = module->version()->as_C_string();
2444 buf_len += (int)strlen(module_version);
2445 }
2446 }
2447
2448 // Allocate temporary buffer with extra space for formatting and line number
2449 const size_t buf_size = buf_len + 64;
2450 char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2451
2452 // Print stack trace line in buffer
2453 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2454
2455 // Print module information
2456 if (module_name != nullptr) {
2457 if (module_version != nullptr) {
2458 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2459 } else {
2460 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2461 }
2462 }
2463
2464 // The method can be null if the requested class version is gone
2465 Method* method = holder->method_with_orig_idnum(method_id, version);
2466 if (!version_matches(method, version)) {
2467 strcat(buf, "Redefined)");
2468 } else {
2469 int line_number = Backtrace::get_line_number(method, bci);
2470 if (line_number == -2) {
2471 strcat(buf, "Native Method)");
2472 } else {
2473 if (source_file_name != nullptr && (line_number != -1)) {
2474 // Sourcename and linenumber
2475 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2476 } else if (source_file_name != nullptr) {
2477 // Just sourcename
2478 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2479 } else {
2480 // Neither sourcename nor linenumber
2481 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2482 }
2483 nmethod* nm = method->code();
2484 if (WizardMode && nm != nullptr) {
2485 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2486 }
2487 }
2488 }
2489
2490 st->print_cr("%s", buf);
2491 }
2492
2493 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2494 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2495 int method_id = method->orig_method_idnum();
2496 int version = method->constants()->version();
2497 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2498 }
2499
2500 /**
2501 * Print the throwable message and its stack trace plus all causes by walking the
2502 * cause chain. The output looks the same as of Throwable.printStackTrace().
2503 */
2504 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2505 // First, print the message.
2506 print(throwable(), st);
2507 st->cr();
2508
2509 // Now print the stack trace.
2510 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2511 while (throwable.not_null()) {
2512 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2513 if (result.is_null()) {
2514 st->print_raw_cr("\t<<no stack trace available>>");
2515 return;
2516 }
2517 BacktraceIterator iter(result, THREAD);
2518
2519 while (iter.repeat()) {
2520 BacktraceElement bte = iter.next(THREAD);
2521 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2522 }
2523 if (THREAD->can_call_java()) {
2524 // Call getCause() which doesn't necessarily return the _cause field.
2525 ExceptionMark em(THREAD);
2526 JavaValue cause(T_OBJECT);
2527 JavaCalls::call_virtual(&cause,
2528 throwable,
2529 throwable->klass(),
2530 vmSymbols::getCause_name(),
2531 vmSymbols::void_throwable_signature(),
2532 THREAD);
2533 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2534 if (HAS_PENDING_EXCEPTION) {
2535 CLEAR_PENDING_EXCEPTION;
2536 throwable = Handle();
2537 } else {
2538 throwable = Handle(THREAD, cause.get_oop());
2539 if (throwable.not_null()) {
2540 st->print("Caused by: ");
2541 print(throwable(), st);
2542 st->cr();
2543 }
2544 }
2545 } else {
2546 st->print_raw_cr("<<cannot call Java to get cause>>");
2547 return;
2548 }
2549 }
2550 }
2551
2552 /**
2553 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2554 */
2555 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2556 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2557 JavaValue result(T_VOID);
2558 JavaCalls::call_virtual(&result,
2559 throwable,
2560 vmClasses::Throwable_klass(),
2561 vmSymbols::printStackTrace_name(),
2562 vmSymbols::void_method_signature(),
2563 THREAD);
2564 }
2565
2566 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2567 if (!StackTraceInThrowable) return;
2568 ResourceMark rm(THREAD);
2569
2570 // Start out by clearing the backtrace for this object, in case the VM
2571 // runs out of memory while allocating the stack trace
2572 set_backtrace(throwable(), nullptr);
2573 // Clear lazily constructed Java level stacktrace if refilling occurs
2574 // This is unnecessary in 1.7+ but harmless
2575 clear_stacktrace(throwable());
2576
2577 int max_depth = MaxJavaStackTraceDepth;
2578 JavaThread* thread = THREAD;
2579
2580 BacktraceBuilder bt(CHECK);
2581
2582 // If there is no Java frame just return the method that was being called
2583 // with bci 0
2584 if (!thread->has_last_Java_frame()) {
2585 if (max_depth >= 1 && method() != nullptr) {
2586 bt.push(method(), 0, CHECK);
2587 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2588 set_depth(throwable(), 1);
2589 set_backtrace(throwable(), bt.backtrace());
2590 }
2591 return;
2592 }
2593
2594 // Instead of using vframe directly, this version of fill_in_stack_trace
2595 // basically handles everything by hand. This significantly improved the
2596 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2597 // See bug 6333838 for more details.
2598 // The "ASSERT" here is to verify this method generates the exactly same stack
2599 // trace as utilizing vframe.
2600 #ifdef ASSERT
2601 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2602 #endif
2603 int total_count = 0;
2604 RegisterMap map(thread,
2605 RegisterMap::UpdateMap::skip,
2606 RegisterMap::ProcessFrames::skip,
2607 RegisterMap::WalkContinuation::include);
2608 int decode_offset = 0;
2609 nmethod* nm = nullptr;
2610 bool skip_fillInStackTrace_check = false;
2611 bool skip_throwableInit_check = false;
2612 bool skip_hidden = !ShowHiddenFrames;
2613 bool show_carrier = ShowCarrierFrames;
2614 ContinuationEntry* cont_entry = thread->last_continuation();
2615 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2616 Method* method = nullptr;
2617 int bci = 0;
2618
2619 // Compiled java method case.
2620 if (decode_offset != 0) {
2621 DebugInfoReadStream stream(nm, decode_offset);
2622 decode_offset = stream.read_int();
2623 method = (Method*)nm->metadata_at(stream.read_int());
2624 bci = stream.read_bci();
2625 } else {
2626 if (fr.is_first_frame()) break;
2627
2628 if (Continuation::is_continuation_enterSpecial(fr)) {
2629 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2630 if (!show_carrier && cont_entry->is_virtual_thread()) {
2631 break;
2632 }
2633 cont_entry = cont_entry->parent();
2634 }
2635
2636 address pc = fr.pc();
2637 if (fr.is_interpreted_frame()) {
2638 address bcp;
2639 if (!map.in_cont()) {
2640 bcp = fr.interpreter_frame_bcp();
2641 method = fr.interpreter_frame_method();
2642 } else {
2643 bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2644 method = map.stack_chunk()->interpreter_frame_method(fr);
2645 }
2646 bci = method->bci_from(bcp);
2647 fr = fr.sender(&map);
2648 } else {
2649 CodeBlob* cb = fr.cb();
2650 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2651 // but non nmethod
2652 fr = fr.sender(&map);
2653 if (cb == nullptr || !cb->is_nmethod()) {
2654 continue;
2655 }
2656 nm = cb->as_nmethod();
2657 assert(nm->method() != nullptr, "must be");
2658 if (nm->method()->is_native()) {
2659 method = nm->method();
2660 bci = 0;
2661 } else {
2662 PcDesc* pd = nm->pc_desc_at(pc);
2663 decode_offset = pd->scope_decode_offset();
2664 // if decode_offset is not equal to 0, it will execute the
2665 // "compiled java method case" at the beginning of the loop.
2666 continue;
2667 }
2668 }
2669 }
2670 #ifdef ASSERT
2671 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2672 assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2673 st.next();
2674 }
2675 #endif
2676
2677 // the format of the stacktrace will be:
2678 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2679 // - 0 or more <init> methods for the exception class (skipped)
2680 // - rest of the stack
2681
2682 if (!skip_fillInStackTrace_check) {
2683 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2684 throwable->is_a(method->method_holder())) {
2685 continue;
2686 }
2687 else {
2688 skip_fillInStackTrace_check = true; // gone past them all
2689 }
2690 }
2691 if (!skip_throwableInit_check) {
2692 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2693
2694 // skip <init> methods of the exception class and superclasses
2695 // This is similar to classic VM.
2696 if (method->name() == vmSymbols::object_initializer_name() &&
2697 throwable->is_a(method->method_holder())) {
2698 continue;
2699 } else {
2700 // there are none or we've seen them all - either way stop checking
2701 skip_throwableInit_check = true;
2702 }
2703 }
2704 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2705 if (skip_hidden) {
2706 if (total_count == 0) {
2707 // The top frame will be hidden from the stack trace.
2708 bt.set_has_hidden_top_frame();
2709 }
2710 continue;
2711 }
2712 }
2713
2714 bt.push(method, bci, CHECK);
2715 total_count++;
2716 }
2717
2718 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2719
2720 // Put completed stack trace into throwable object
2721 set_backtrace(throwable(), bt.backtrace());
2722 set_depth(throwable(), total_count);
2723 }
2724
2725 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2726 // No-op if stack trace is disabled
2727 if (!StackTraceInThrowable) {
2728 return;
2729 }
2730
2731 // Disable stack traces for some preallocated out of memory errors
2732 if (!Universe::should_fill_in_stack_trace(throwable)) {
2733 return;
2734 }
2735
2736 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2737 PreserveExceptionMark pm(THREAD);
2738
2739 fill_in_stack_trace(throwable, method, THREAD);
2740 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2741 // original exception via the PreserveExceptionMark destructor.
2742 CLEAR_PENDING_EXCEPTION;
2743 }
2744
2745 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2746 // Allocate stack trace - backtrace is created but not filled in
2747
2748 // No-op if stack trace is disabled
2749 if (!StackTraceInThrowable) return;
2750 BacktraceBuilder bt(CHECK); // creates a backtrace
2751 set_backtrace(throwable(), bt.backtrace());
2752 }
2753
2754
2755 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2756 // Fill in stack trace into preallocated backtrace (no GC)
2757
2758 // No-op if stack trace is disabled
2759 if (!StackTraceInThrowable) return;
2760
2761 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2762
2763 JavaThread* THREAD = JavaThread::current(); // For exception macros.
2764
2765 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2766 assert(backtrace.not_null(), "backtrace should have been preallocated");
2767
2768 ResourceMark rm(THREAD);
2769 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2770
2771 BacktraceBuilder bt(THREAD, backtrace);
2772
2773 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2774 // methods as preallocated errors aren't created by "java" code.
2775
2776 // fill in as much stack trace as possible
2777 int chunk_count = 0;
2778 for (;!st.at_end(); st.next()) {
2779 bt.push(st.method(), st.bci(), CHECK);
2780 chunk_count++;
2781
2782 // Bail-out for deep stacks
2783 if (chunk_count >= trace_chunk_size) break;
2784 }
2785 set_depth(throwable(), chunk_count);
2786 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2787
2788 // We support the Throwable immutability protocol defined for Java 7.
2789 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2790 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2791 }
2792
2793 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2794 objArrayHandle stack_trace_array_h, TRAPS) {
2795
2796 if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2797 THROW(vmSymbols::java_lang_NullPointerException());
2798 }
2799
2800 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2801
2802 if (stack_trace_array_h->length() != depth) {
2803 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2804 }
2805
2806 objArrayHandle result(THREAD, objArrayOop(backtrace()));
2807 BacktraceIterator iter(result, THREAD);
2808
2809 int index = 0;
2810 while (iter.repeat()) {
2811 BacktraceElement bte = iter.next(THREAD);
2812
2813 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2814
2815 if (stack_trace_element.is_null()) {
2816 THROW(vmSymbols::java_lang_NullPointerException());
2817 }
2818
2819 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2820 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2821
2822 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2823 method,
2824 bte._version,
2825 bte._bci,
2826 bte._name,
2827 CHECK);
2828 }
2829 }
2830
2831 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2832 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2833 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2834 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2835 // symbolic stacktrace of 'throwable'.
2836 assert(throwable.not_null(), "shouldn't be");
2837
2838 // Now create the message from the original exception and thread name.
2839 ResourceMark rm(current);
2840 const char *message = nullptr;
2841 oop detailed_message = java_lang_Throwable::message(throwable());
2842 if (detailed_message != nullptr) {
2843 message = java_lang_String::as_utf8_string(detailed_message);
2844 }
2845 stringStream st;
2846 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2847 message == nullptr ? "" : ":");
2848 if (message == nullptr) {
2849 st.print("[in thread \"%s\"]", current->name());
2850 } else {
2851 st.print("%s [in thread \"%s\"]", message, current->name());
2852 }
2853
2854 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2855 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2856 // If new_exception returns a different exception while creating the exception,
2857 // abandon the attempt to save the initialization error and return null.
2858 if (init_error->klass()->name() != exception_name) {
2859 log_info(class, init)("Exception %s thrown while saving initialization exception",
2860 init_error->klass()->external_name());
2861 return Handle();
2862 }
2863
2864 // Call to java to fill in the stack trace and clear declaringClassObject to
2865 // not keep classes alive in the stack trace.
2866 // call this: public StackTraceElement[] getStackTrace()
2867 JavaValue result(T_ARRAY);
2868 JavaCalls::call_virtual(&result, throwable,
2869 vmClasses::Throwable_klass(),
2870 vmSymbols::getStackTrace_name(),
2871 vmSymbols::getStackTrace_signature(),
2872 current);
2873 if (!current->has_pending_exception()){
2874 Handle stack_trace(current, result.get_oop());
2875 assert(stack_trace->is_objArray(), "Should be an array");
2876 java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2877 // Clear backtrace because the stacktrace should be used instead.
2878 set_backtrace(init_error(), nullptr);
2879 } else {
2880 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2881 init_error->klass()->external_name());
2882 current->clear_pending_exception();
2883 }
2884
2885 return init_error;
2886 }
2887
2888 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2889 JavaThread* current = JavaThread::current();
2890 objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2891 BacktraceIterator iter(result, current);
2892 // No backtrace available.
2893 if (!iter.repeat()) return false;
2894
2895 // If the exception happened in a frame that has been hidden, i.e.,
2896 // omitted from the back trace, we can not compute the message.
2897 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2898 if (hidden != nullptr) {
2899 return false;
2900 }
2901
2902 // Get first backtrace element.
2903 BacktraceElement bte = iter.next(current);
2904
2905 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2906 assert(holder != nullptr, "first element should be non-null");
2907 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2908
2909 // Original version is no longer available.
2910 if (m == nullptr || !version_matches(m, bte._version)) {
2911 return false;
2912 }
2913
2914 *method = m;
2915 *bci = bte._bci;
2916 return true;
2917 }
2918
2919 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2920 // Allocate java.lang.StackTraceElement instance
2921 InstanceKlass* k = vmClasses::StackTraceElement_klass();
2922 assert(k != nullptr, "must be loaded in 1.4+");
2923 if (k->should_be_initialized()) {
2924 k->initialize(CHECK_NULL);
2925 }
2926
2927 Handle element = k->allocate_instance_handle(CHECK_NULL);
2928
2929 int version = method->constants()->version();
2930 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2931 return element();
2932 }
2933
2934 void java_lang_StackTraceElement::fill_in(Handle element,
2935 InstanceKlass* holder, const methodHandle& method,
2936 int version, int bci, Symbol* name, TRAPS) {
2937 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
2938
2939 ResourceMark rm(THREAD);
2940 HandleMark hm(THREAD);
2941
2942 // Fill in class name
2943 Handle java_class(THREAD, holder->java_mirror());
2944 oop classname = java_lang_Class::name(java_class, CHECK);
2945 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2946 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2947
2948 oop loader = holder->class_loader();
2949 if (loader != nullptr) {
2950 oop loader_name = java_lang_ClassLoader::name(loader);
2951 if (loader_name != nullptr)
2952 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2953 }
2954
2955 // Fill in method name
2956 oop methodname = StringTable::intern(name, CHECK);
2957 java_lang_StackTraceElement::set_methodName(element(), methodname);
2958
2959 // Fill in module name and version
2960 ModuleEntry* module = holder->module();
2961 if (module->is_named()) {
2962 oop module_name = StringTable::intern(module->name(), CHECK);
2963 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2964 oop module_version;
2965 if (module->version() != nullptr) {
2966 module_version = StringTable::intern(module->version(), CHECK);
2967 } else {
2968 module_version = nullptr;
2969 }
2970 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2971 }
2972
2973 if (method() == nullptr || !version_matches(method(), version)) {
2974 // The method was redefined, accurate line number information isn't available
2975 java_lang_StackTraceElement::set_fileName(element(), nullptr);
2976 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2977 } else {
2978 Symbol* source;
2979 oop source_file;
2980 int line_number;
2981 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
2982
2983 java_lang_StackTraceElement::set_fileName(element(), source_file);
2984 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2985 }
2986 }
2987
2988 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
2989 InstanceKlass* holder,
2990 int version,
2991 const methodHandle& method,
2992 int bci,
2993 Symbol*& source,
2994 oop& source_file,
2995 int& line_number, TRAPS) {
2996 // Fill in source file name and line number.
2997 source = Backtrace::get_source_file_name(holder, version);
2998 source_file = java_lang_Class::source_file(java_class());
2999 if (source != nullptr) {
3000 // Class was not redefined. We can trust its cache if set,
3001 // else we have to initialize it.
3002 if (source_file == nullptr) {
3003 source_file = StringTable::intern(source, CHECK);
3004 java_lang_Class::set_source_file(java_class(), source_file);
3005 }
3006 } else {
3007 // Class was redefined. Dump the cache if it was set.
3008 if (source_file != nullptr) {
3009 source_file = nullptr;
3010 java_lang_Class::set_source_file(java_class(), source_file);
3011 }
3012 }
3013 line_number = Backtrace::get_line_number(method(), bci);
3014 }
3015
3016 #if INCLUDE_JVMCI
3017 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3018 Symbol*& filename, int& line_number, TRAPS) {
3019 ResourceMark rm(THREAD);
3020 HandleMark hm(THREAD);
3021
3022 filename = nullptr;
3023 line_number = -1;
3024
3025 oop source_file;
3026 int version = method->constants()->version();
3027 InstanceKlass* holder = method->method_holder();
3028 Handle java_class(THREAD, holder->java_mirror());
3029 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3030 }
3031 #endif // INCLUDE_JVMCI
3032
3033 // java_lang_ClassFrameInfo
3034
3035 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3036 int java_lang_ClassFrameInfo::_flags_offset;
3037
3038 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3039 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \
3040 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false)
3041
3042 void java_lang_ClassFrameInfo::compute_offsets() {
3043 InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3044 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3045 }
3046
3047 #if INCLUDE_CDS
3048 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3049 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3050 }
3051 #endif
3052
3053 static int get_flags(const methodHandle& m) {
3054 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS );
3055 if (m->is_object_initializer()) {
3056 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3057 } else {
3058 // Note: Static initializers can be here. Record them as plain methods.
3059 flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3060 }
3061 if (m->caller_sensitive()) {
3062 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3063 }
3064 if (m->is_hidden()) {
3065 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3066 }
3067 assert((flags & 0xFF000000) == 0, "unexpected flags");
3068 return flags;
3069 }
3070
3071 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3072 return obj->obj_field(_classOrMemberName_offset);
3073 }
3074
3075 int java_lang_ClassFrameInfo::flags(oop obj) {
3076 return obj->int_field(_flags_offset);
3077 }
3078
3079 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3080 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3081 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3082 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3083 stackFrame->int_field_put(_flags_offset, flags);
3084 }
3085
3086 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3087 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3088 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3089 // flags is initialized when ClassFrameInfo object is constructed and retain the value
3090 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3091 stackFrame->int_field_put(_flags_offset, flags);
3092 }
3093
3094
3095 // java_lang_StackFrameInfo
3096
3097 int java_lang_StackFrameInfo::_type_offset;
3098 int java_lang_StackFrameInfo::_name_offset;
3099 int java_lang_StackFrameInfo::_bci_offset;
3100 int java_lang_StackFrameInfo::_version_offset;
3101 int java_lang_StackFrameInfo::_contScope_offset;
3102
3103 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3104 macro(_type_offset, k, "type", object_signature, false); \
3105 macro(_name_offset, k, "name", string_signature, false); \
3106 macro(_bci_offset, k, "bci", int_signature, false); \
3107 macro(_contScope_offset, k, "contScope", continuationscope_signature, false)
3108
3109 void java_lang_StackFrameInfo::compute_offsets() {
3110 InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3111 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3112 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3113 }
3114
3115 #if INCLUDE_CDS
3116 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3117 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3118 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3119 }
3120 #endif
3121
3122 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3123 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3124 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3125 return method;
3126 }
3127
3128 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3129 // set Method* or mid/cpref
3130 HandleMark hm(THREAD);
3131 Handle cont_h(THREAD, cont);
3132 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3133
3134 // set bci
3135 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3136 // method may be redefined; store the version
3137 int version = method->constants()->version();
3138 assert((jushort)version == version, "version should be short");
3139 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3140
3141 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3142 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3143 }
3144
3145 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3146 ResourceMark rm(THREAD);
3147 HandleMark hm(THREAD);
3148
3149 Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3150 InstanceKlass* holder = method->method_holder();
3151 short version = stackFrame->short_field(_version_offset);
3152 int bci = stackFrame->int_field(_bci_offset);
3153 Symbol* name = method->name();
3154 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3155 }
3156
3157 oop java_lang_StackFrameInfo::type(oop obj) {
3158 return obj->obj_field(_type_offset);
3159 }
3160
3161 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3162 obj->obj_field_put(_type_offset, value);
3163 }
3164
3165 oop java_lang_StackFrameInfo::name(oop obj) {
3166 return obj->obj_field(_name_offset);
3167 }
3168
3169 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3170 obj->obj_field_put(_name_offset, value);
3171 }
3172
3173 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3174 obj->short_field_put(_version_offset, value);
3175 }
3176
3177 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3178 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3179 obj->int_field_put(_bci_offset, value);
3180 }
3181
3182 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3183 obj->obj_field_put(_contScope_offset, value);
3184 }
3185
3186 int java_lang_LiveStackFrameInfo::_monitors_offset;
3187 int java_lang_LiveStackFrameInfo::_locals_offset;
3188 int java_lang_LiveStackFrameInfo::_operands_offset;
3189 int java_lang_LiveStackFrameInfo::_mode_offset;
3190
3191 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3192 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
3193 macro(_locals_offset, k, "locals", object_array_signature, false); \
3194 macro(_operands_offset, k, "operands", object_array_signature, false); \
3195 macro(_mode_offset, k, "mode", int_signature, false)
3196
3197 void java_lang_LiveStackFrameInfo::compute_offsets() {
3198 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3199 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3200 }
3201
3202 #if INCLUDE_CDS
3203 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3204 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3205 }
3206 #endif
3207
3208 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3209 obj->obj_field_put(_monitors_offset, value);
3210 }
3211
3212 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3213 obj->obj_field_put(_locals_offset, value);
3214 }
3215
3216 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3217 obj->obj_field_put(_operands_offset, value);
3218 }
3219
3220 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3221 obj->int_field_put(_mode_offset, value);
3222 }
3223
3224
3225 // java_lang_AccessibleObject
3226
3227 int java_lang_reflect_AccessibleObject::_override_offset;
3228
3229 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3230 macro(_override_offset, k, "override", bool_signature, false)
3231
3232 void java_lang_reflect_AccessibleObject::compute_offsets() {
3233 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3234 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3235 }
3236
3237 #if INCLUDE_CDS
3238 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3239 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3240 }
3241 #endif
3242
3243 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3244 return (jboolean) reflect->bool_field(_override_offset);
3245 }
3246
3247 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3248 reflect->bool_field_put(_override_offset, (int) value);
3249 }
3250
3251 // java_lang_reflect_Method
3252
3253 int java_lang_reflect_Method::_clazz_offset;
3254 int java_lang_reflect_Method::_name_offset;
3255 int java_lang_reflect_Method::_returnType_offset;
3256 int java_lang_reflect_Method::_parameterTypes_offset;
3257 int java_lang_reflect_Method::_exceptionTypes_offset;
3258 int java_lang_reflect_Method::_slot_offset;
3259 int java_lang_reflect_Method::_modifiers_offset;
3260 int java_lang_reflect_Method::_signature_offset;
3261 int java_lang_reflect_Method::_annotations_offset;
3262 int java_lang_reflect_Method::_parameter_annotations_offset;
3263 int java_lang_reflect_Method::_annotation_default_offset;
3264
3265 #define METHOD_FIELDS_DO(macro) \
3266 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3267 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3268 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
3269 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3270 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3271 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3272 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3273 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3274 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3275 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3276 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
3277
3278 void java_lang_reflect_Method::compute_offsets() {
3279 InstanceKlass* k = vmClasses::reflect_Method_klass();
3280 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3281 }
3282
3283 #if INCLUDE_CDS
3284 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3285 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3286 }
3287 #endif
3288
3289 Handle java_lang_reflect_Method::create(TRAPS) {
3290 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3291 Klass* klass = vmClasses::reflect_Method_klass();
3292 // This class is eagerly initialized during VM initialization, since we keep a reference
3293 // to one of the methods
3294 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3295 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3296 }
3297
3298 oop java_lang_reflect_Method::clazz(oop reflect) {
3299 return reflect->obj_field(_clazz_offset);
3300 }
3301
3302 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3303 reflect->obj_field_put(_clazz_offset, value);
3304 }
3305
3306 int java_lang_reflect_Method::slot(oop reflect) {
3307 return reflect->int_field(_slot_offset);
3308 }
3309
3310 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3311 reflect->int_field_put(_slot_offset, value);
3312 }
3313
3314 void java_lang_reflect_Method::set_name(oop method, oop value) {
3315 method->obj_field_put(_name_offset, value);
3316 }
3317
3318 oop java_lang_reflect_Method::return_type(oop method) {
3319 return method->obj_field(_returnType_offset);
3320 }
3321
3322 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3323 method->obj_field_put(_returnType_offset, value);
3324 }
3325
3326 oop java_lang_reflect_Method::parameter_types(oop method) {
3327 return method->obj_field(_parameterTypes_offset);
3328 }
3329
3330 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3331 method->obj_field_put(_parameterTypes_offset, value);
3332 }
3333
3334 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3335 method->obj_field_put(_exceptionTypes_offset, value);
3336 }
3337
3338 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3339 method->int_field_put(_modifiers_offset, value);
3340 }
3341
3342 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3343 method->obj_field_put(_signature_offset, value);
3344 }
3345
3346 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3347 method->obj_field_put(_annotations_offset, value);
3348 }
3349
3350 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3351 method->obj_field_put(_parameter_annotations_offset, value);
3352 }
3353
3354 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3355 method->obj_field_put(_annotation_default_offset, value);
3356 }
3357
3358 int java_lang_reflect_Constructor::_clazz_offset;
3359 int java_lang_reflect_Constructor::_parameterTypes_offset;
3360 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3361 int java_lang_reflect_Constructor::_slot_offset;
3362 int java_lang_reflect_Constructor::_modifiers_offset;
3363 int java_lang_reflect_Constructor::_signature_offset;
3364 int java_lang_reflect_Constructor::_annotations_offset;
3365 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3366
3367 #define CONSTRUCTOR_FIELDS_DO(macro) \
3368 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3369 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3370 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3371 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3372 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3373 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3374 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
3375 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3376
3377 void java_lang_reflect_Constructor::compute_offsets() {
3378 InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3379 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3380 }
3381
3382 #if INCLUDE_CDS
3383 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3384 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3385 }
3386 #endif
3387
3388 Handle java_lang_reflect_Constructor::create(TRAPS) {
3389 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3390 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3391 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3392 InstanceKlass* ik = InstanceKlass::cast(k);
3393 // Ensure it is initialized
3394 ik->initialize(CHECK_NH);
3395 return ik->allocate_instance_handle(THREAD);
3396 }
3397
3398 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3399 return reflect->obj_field(_clazz_offset);
3400 }
3401
3402 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3403 reflect->obj_field_put(_clazz_offset, value);
3404 }
3405
3406 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3407 return constructor->obj_field(_parameterTypes_offset);
3408 }
3409
3410 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3411 constructor->obj_field_put(_parameterTypes_offset, value);
3412 }
3413
3414 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3415 constructor->obj_field_put(_exceptionTypes_offset, value);
3416 }
3417
3418 int java_lang_reflect_Constructor::slot(oop reflect) {
3419 return reflect->int_field(_slot_offset);
3420 }
3421
3422 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3423 reflect->int_field_put(_slot_offset, value);
3424 }
3425
3426 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3427 constructor->int_field_put(_modifiers_offset, value);
3428 }
3429
3430 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3431 constructor->obj_field_put(_signature_offset, value);
3432 }
3433
3434 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3435 constructor->obj_field_put(_annotations_offset, value);
3436 }
3437
3438 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3439 method->obj_field_put(_parameter_annotations_offset, value);
3440 }
3441
3442 int java_lang_reflect_Field::_clazz_offset;
3443 int java_lang_reflect_Field::_name_offset;
3444 int java_lang_reflect_Field::_type_offset;
3445 int java_lang_reflect_Field::_slot_offset;
3446 int java_lang_reflect_Field::_modifiers_offset;
3447 int java_lang_reflect_Field::_trusted_final_offset;
3448 int java_lang_reflect_Field::_signature_offset;
3449 int java_lang_reflect_Field::_annotations_offset;
3450
3451 #define FIELD_FIELDS_DO(macro) \
3452 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3453 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3454 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \
3455 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3456 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3457 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \
3458 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3459 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3460
3461 void java_lang_reflect_Field::compute_offsets() {
3462 InstanceKlass* k = vmClasses::reflect_Field_klass();
3463 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3464 }
3465
3466 #if INCLUDE_CDS
3467 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3468 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3469 }
3470 #endif
3471
3472 Handle java_lang_reflect_Field::create(TRAPS) {
3473 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3474 Symbol* name = vmSymbols::java_lang_reflect_Field();
3475 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3476 InstanceKlass* ik = InstanceKlass::cast(k);
3477 // Ensure it is initialized
3478 ik->initialize(CHECK_NH);
3479 return ik->allocate_instance_handle(THREAD);
3480 }
3481
3482 oop java_lang_reflect_Field::clazz(oop reflect) {
3483 return reflect->obj_field(_clazz_offset);
3484 }
3485
3486 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3487 reflect->obj_field_put(_clazz_offset, value);
3488 }
3489
3490 oop java_lang_reflect_Field::name(oop field) {
3491 return field->obj_field(_name_offset);
3492 }
3493
3494 void java_lang_reflect_Field::set_name(oop field, oop value) {
3495 field->obj_field_put(_name_offset, value);
3496 }
3497
3498 oop java_lang_reflect_Field::type(oop field) {
3499 return field->obj_field(_type_offset);
3500 }
3501
3502 void java_lang_reflect_Field::set_type(oop field, oop value) {
3503 field->obj_field_put(_type_offset, value);
3504 }
3505
3506 int java_lang_reflect_Field::slot(oop reflect) {
3507 return reflect->int_field(_slot_offset);
3508 }
3509
3510 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3511 reflect->int_field_put(_slot_offset, value);
3512 }
3513
3514 int java_lang_reflect_Field::modifiers(oop field) {
3515 return field->int_field(_modifiers_offset);
3516 }
3517
3518 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3519 field->int_field_put(_modifiers_offset, value);
3520 }
3521
3522 void java_lang_reflect_Field::set_trusted_final(oop field) {
3523 field->bool_field_put(_trusted_final_offset, true);
3524 }
3525
3526 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3527 field->obj_field_put(_signature_offset, value);
3528 }
3529
3530 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3531 field->obj_field_put(_annotations_offset, value);
3532 }
3533
3534 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3535 // Allocate java.lang.reflect.RecordComponent instance
3536 HandleMark hm(THREAD);
3537 InstanceKlass* ik = vmClasses::RecordComponent_klass();
3538 assert(ik != nullptr, "must be loaded");
3539 ik->initialize(CHECK_NULL);
3540
3541 Handle element = ik->allocate_instance_handle(CHECK_NULL);
3542
3543 Handle decl_class(THREAD, holder->java_mirror());
3544 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3545
3546 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3547 oop component_name = StringTable::intern(name, CHECK_NULL);
3548 java_lang_reflect_RecordComponent::set_name(element(), component_name);
3549
3550 Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3551 Handle component_type_h =
3552 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3553 java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3554
3555 Method* accessor_method = nullptr;
3556 {
3557 // Prepend "()" to type to create the full method signature.
3558 ResourceMark rm(THREAD);
3559 int sig_len = type->utf8_length() + 3; // "()" and null char
3560 char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3561 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3562 TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3563 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3564 }
3565
3566 if (accessor_method != nullptr) {
3567 methodHandle method(THREAD, accessor_method);
3568 oop m = Reflection::new_method(method, false, CHECK_NULL);
3569 java_lang_reflect_RecordComponent::set_accessor(element(), m);
3570 } else {
3571 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3572 }
3573
3574 int sig_index = component->generic_signature_index();
3575 if (sig_index > 0) {
3576 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3577 oop component_sig = StringTable::intern(sig, CHECK_NULL);
3578 java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3579 } else {
3580 java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3581 }
3582
3583 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3584 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3585
3586 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3587 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3588
3589 return element();
3590 }
3591
3592 int reflect_ConstantPool::_oop_offset;
3593
3594 #define CONSTANTPOOL_FIELDS_DO(macro) \
3595 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3596
3597 void reflect_ConstantPool::compute_offsets() {
3598 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3599 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3600 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3601 }
3602
3603 #if INCLUDE_CDS
3604 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3605 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3606 }
3607 #endif
3608
3609 int java_lang_reflect_Parameter::_name_offset;
3610 int java_lang_reflect_Parameter::_modifiers_offset;
3611 int java_lang_reflect_Parameter::_index_offset;
3612 int java_lang_reflect_Parameter::_executable_offset;
3613
3614 #define PARAMETER_FIELDS_DO(macro) \
3615 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3616 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3617 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \
3618 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3619
3620 void java_lang_reflect_Parameter::compute_offsets() {
3621 InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3622 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3623 }
3624
3625 #if INCLUDE_CDS
3626 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3627 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3628 }
3629 #endif
3630
3631 Handle java_lang_reflect_Parameter::create(TRAPS) {
3632 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3633 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3634 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3635 InstanceKlass* ik = InstanceKlass::cast(k);
3636 // Ensure it is initialized
3637 ik->initialize(CHECK_NH);
3638 return ik->allocate_instance_handle(THREAD);
3639 }
3640
3641 oop java_lang_reflect_Parameter::name(oop param) {
3642 return param->obj_field(_name_offset);
3643 }
3644
3645 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3646 param->obj_field_put(_name_offset, value);
3647 }
3648
3649 int java_lang_reflect_Parameter::modifiers(oop param) {
3650 return param->int_field(_modifiers_offset);
3651 }
3652
3653 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3654 param->int_field_put(_modifiers_offset, value);
3655 }
3656
3657 int java_lang_reflect_Parameter::index(oop param) {
3658 return param->int_field(_index_offset);
3659 }
3660
3661 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3662 param->int_field_put(_index_offset, value);
3663 }
3664
3665 oop java_lang_reflect_Parameter::executable(oop param) {
3666 return param->obj_field(_executable_offset);
3667 }
3668
3669 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3670 param->obj_field_put(_executable_offset, value);
3671 }
3672
3673 // java_lang_Module
3674
3675 int java_lang_Module::_loader_offset;
3676 int java_lang_Module::_name_offset;
3677 int java_lang_Module::_module_entry_offset;
3678
3679 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3680 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3681 return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3682 vmSymbols::java_lang_module_init_signature(),
3683 loader, module_name, CHECK_NH);
3684 }
3685
3686 #define MODULE_FIELDS_DO(macro) \
3687 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3688 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false)
3689
3690 void java_lang_Module::compute_offsets() {
3691 InstanceKlass* k = vmClasses::Module_klass();
3692 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3693 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3694 }
3695
3696 #if INCLUDE_CDS
3697 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3698 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3699 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3700 }
3701 #endif
3702
3703 oop java_lang_Module::loader(oop module) {
3704 return module->obj_field(_loader_offset);
3705 }
3706
3707 void java_lang_Module::set_loader(oop module, oop value) {
3708 module->obj_field_put(_loader_offset, value);
3709 }
3710
3711 oop java_lang_Module::name(oop module) {
3712 return module->obj_field(_name_offset);
3713 }
3714
3715 void java_lang_Module::set_name(oop module, oop value) {
3716 module->obj_field_put(_name_offset, value);
3717 }
3718
3719 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3720 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3721 assert(module != nullptr, "module can't be null");
3722 assert(oopDesc::is_oop(module), "module must be oop");
3723
3724 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3725 return module_entry;
3726 }
3727
3728 ModuleEntry* java_lang_Module::module_entry(oop module) {
3729 ModuleEntry* module_entry = module_entry_raw(module);
3730 if (module_entry == nullptr) {
3731 // If the inject field containing the ModuleEntry* is null then return the
3732 // class loader's unnamed module.
3733 oop loader = java_lang_Module::loader(module);
3734 Handle h_loader = Handle(Thread::current(), loader);
3735 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3736 return loader_cld->unnamed_module();
3737 }
3738 return module_entry;
3739 }
3740
3741 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3742 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3743 assert(module != nullptr, "module can't be null");
3744 assert(oopDesc::is_oop(module), "module must be oop");
3745 module->address_field_put(_module_entry_offset, (address)module_entry);
3746 }
3747
3748 Handle reflect_ConstantPool::create(TRAPS) {
3749 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3750 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3751 // Ensure it is initialized
3752 k->initialize(CHECK_NH);
3753 return k->allocate_instance_handle(THREAD);
3754 }
3755
3756
3757 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3758 oop mirror = value->pool_holder()->java_mirror();
3759 // Save the mirror to get back the constant pool.
3760 reflect->obj_field_put(_oop_offset, mirror);
3761 }
3762
3763 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3764
3765 oop mirror = reflect->obj_field(_oop_offset);
3766 Klass* k = java_lang_Class::as_Klass(mirror);
3767 assert(k->is_instance_klass(), "Must be");
3768
3769 // Get the constant pool back from the klass. Since class redefinition
3770 // merges the new constant pool into the old, this is essentially the
3771 // same constant pool as the original. If constant pool merging is
3772 // no longer done in the future, this will have to change to save
3773 // the original.
3774 return InstanceKlass::cast(k)->constants();
3775 }
3776
3777
3778 // Support for java_lang_ref_Reference
3779
3780 bool java_lang_ref_Reference::_offsets_initialized;
3781
3782 int java_lang_ref_Reference::_referent_offset;
3783 int java_lang_ref_Reference::_queue_offset;
3784 int java_lang_ref_Reference::_next_offset;
3785 int java_lang_ref_Reference::_discovered_offset;
3786
3787 #define REFERENCE_FIELDS_DO(macro) \
3788 macro(_referent_offset, k, "referent", object_signature, false); \
3789 macro(_queue_offset, k, "queue", referencequeue_signature, false); \
3790 macro(_next_offset, k, "next", reference_signature, false); \
3791 macro(_discovered_offset, k, "discovered", reference_signature, false);
3792
3793 void java_lang_ref_Reference::compute_offsets() {
3794 if (_offsets_initialized) {
3795 return;
3796 }
3797 _offsets_initialized = true;
3798 InstanceKlass* k = vmClasses::Reference_klass();
3799 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3800 }
3801
3802 #if INCLUDE_CDS
3803 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3804 f->do_bool(&_offsets_initialized);
3805 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3806 }
3807 #endif
3808
3809 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3810 assert(obj != nullptr, "sanity");
3811 if (offset != _referent_offset) {
3812 return false;
3813 }
3814
3815 Klass* k = obj->klass();
3816 if (!k->is_instance_klass()) {
3817 return false;
3818 }
3819
3820 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3821 bool is_reference = ik->reference_type() != REF_NONE;
3822 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3823 return is_reference;
3824 }
3825
3826 int java_lang_boxing_object::_value_offset;
3827 int java_lang_boxing_object::_long_value_offset;
3828
3829 #define BOXING_FIELDS_DO(macro) \
3830 macro(_value_offset, integerKlass, "value", int_signature, false); \
3831 macro(_long_value_offset, longKlass, "value", long_signature, false);
3832
3833 void java_lang_boxing_object::compute_offsets() {
3834 InstanceKlass* integerKlass = vmClasses::Integer_klass();
3835 InstanceKlass* longKlass = vmClasses::Long_klass();
3836 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3837 }
3838
3839 #if INCLUDE_CDS
3840 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3841 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3842 }
3843 #endif
3844
3845 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3846 Klass* k = vmClasses::box_klass(type);
3847 if (k == nullptr) return nullptr;
3848 InstanceKlass* ik = InstanceKlass::cast(k);
3849 if (!ik->is_initialized()) {
3850 ik->initialize(CHECK_NULL);
3851 }
3852 return ik->allocate_instance(THREAD);
3853 }
3854
3855
3856 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3857 oop box = initialize_and_allocate(type, CHECK_NULL);
3858 if (box == nullptr) return nullptr;
3859 switch (type) {
3860 case T_BOOLEAN:
3861 box->bool_field_put(_value_offset, value->z);
3862 break;
3863 case T_CHAR:
3864 box->char_field_put(_value_offset, value->c);
3865 break;
3866 case T_FLOAT:
3867 box->float_field_put(_value_offset, value->f);
3868 break;
3869 case T_DOUBLE:
3870 box->double_field_put(_long_value_offset, value->d);
3871 break;
3872 case T_BYTE:
3873 box->byte_field_put(_value_offset, value->b);
3874 break;
3875 case T_SHORT:
3876 box->short_field_put(_value_offset, value->s);
3877 break;
3878 case T_INT:
3879 box->int_field_put(_value_offset, value->i);
3880 break;
3881 case T_LONG:
3882 box->long_field_put(_long_value_offset, value->j);
3883 break;
3884 default:
3885 return nullptr;
3886 }
3887 return box;
3888 }
3889
3890
3891 BasicType java_lang_boxing_object::basic_type(oop box) {
3892 if (box == nullptr) return T_ILLEGAL;
3893 BasicType type = vmClasses::box_klass_type(box->klass());
3894 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3895 return T_ILLEGAL;
3896 return type;
3897 }
3898
3899
3900 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3901 BasicType type = vmClasses::box_klass_type(box->klass());
3902 switch (type) {
3903 case T_BOOLEAN:
3904 value->z = box->bool_field(_value_offset);
3905 break;
3906 case T_CHAR:
3907 value->c = box->char_field(_value_offset);
3908 break;
3909 case T_FLOAT:
3910 value->f = box->float_field(_value_offset);
3911 break;
3912 case T_DOUBLE:
3913 value->d = box->double_field(_long_value_offset);
3914 break;
3915 case T_BYTE:
3916 value->b = box->byte_field(_value_offset);
3917 break;
3918 case T_SHORT:
3919 value->s = box->short_field(_value_offset);
3920 break;
3921 case T_INT:
3922 value->i = box->int_field(_value_offset);
3923 break;
3924 case T_LONG:
3925 value->j = box->long_field(_long_value_offset);
3926 break;
3927 default:
3928 return T_ILLEGAL;
3929 } // end switch
3930 return type;
3931 }
3932
3933
3934 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3935 BasicType type = vmClasses::box_klass_type(box->klass());
3936 switch (type) {
3937 case T_BOOLEAN:
3938 box->bool_field_put(_value_offset, value->z);
3939 break;
3940 case T_CHAR:
3941 box->char_field_put(_value_offset, value->c);
3942 break;
3943 case T_FLOAT:
3944 box->float_field_put(_value_offset, value->f);
3945 break;
3946 case T_DOUBLE:
3947 box->double_field_put(_long_value_offset, value->d);
3948 break;
3949 case T_BYTE:
3950 box->byte_field_put(_value_offset, value->b);
3951 break;
3952 case T_SHORT:
3953 box->short_field_put(_value_offset, value->s);
3954 break;
3955 case T_INT:
3956 box->int_field_put(_value_offset, value->i);
3957 break;
3958 case T_LONG:
3959 box->long_field_put(_long_value_offset, value->j);
3960 break;
3961 default:
3962 return T_ILLEGAL;
3963 } // end switch
3964 return type;
3965 }
3966
3967
3968 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3969 switch (type) {
3970 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3971 case T_CHAR: st->print("%d", value->c); break;
3972 case T_BYTE: st->print("%d", value->b); break;
3973 case T_SHORT: st->print("%d", value->s); break;
3974 case T_INT: st->print("%d", value->i); break;
3975 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3976 case T_FLOAT: st->print("%f", value->f); break;
3977 case T_DOUBLE: st->print("%lf", value->d); break;
3978 default: st->print("type %d?", type); break;
3979 }
3980 }
3981
3982
3983 // Support for java_lang_ref_SoftReference
3984 //
3985
3986 int java_lang_ref_SoftReference::_timestamp_offset;
3987 int java_lang_ref_SoftReference::_static_clock_offset;
3988
3989 #define SOFTREFERENCE_FIELDS_DO(macro) \
3990 macro(_timestamp_offset, k, "timestamp", long_signature, false); \
3991 macro(_static_clock_offset, k, "clock", long_signature, true)
3992
3993 void java_lang_ref_SoftReference::compute_offsets() {
3994 InstanceKlass* k = vmClasses::SoftReference_klass();
3995 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3996 }
3997
3998 #if INCLUDE_CDS
3999 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4000 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4001 }
4002 #endif
4003
4004 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4005 return ref->long_field(_timestamp_offset);
4006 }
4007
4008 jlong java_lang_ref_SoftReference::clock() {
4009 InstanceKlass* ik = vmClasses::SoftReference_klass();
4010 oop base = ik->static_field_base_raw();
4011 return base->long_field(_static_clock_offset);
4012 }
4013
4014 void java_lang_ref_SoftReference::set_clock(jlong value) {
4015 InstanceKlass* ik = vmClasses::SoftReference_klass();
4016 oop base = ik->static_field_base_raw();
4017 base->long_field_put(_static_clock_offset, value);
4018 }
4019
4020 // Support for java_lang_invoke_DirectMethodHandle
4021
4022 int java_lang_invoke_DirectMethodHandle::_member_offset;
4023
4024 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4025 oop member_name = nullptr;
4026 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4027 "a DirectMethodHandle oop is expected");
4028 return dmh->obj_field(_member_offset);
4029 }
4030
4031 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4032 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4033
4034 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4035 InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4036 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4037 }
4038
4039 #if INCLUDE_CDS
4040 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4041 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4042 }
4043 #endif
4044
4045 // Support for java_lang_invoke_MethodHandle
4046
4047 int java_lang_invoke_MethodHandle::_type_offset;
4048 int java_lang_invoke_MethodHandle::_form_offset;
4049
4050 int java_lang_invoke_MemberName::_clazz_offset;
4051 int java_lang_invoke_MemberName::_name_offset;
4052 int java_lang_invoke_MemberName::_type_offset;
4053 int java_lang_invoke_MemberName::_flags_offset;
4054 int java_lang_invoke_MemberName::_method_offset;
4055 int java_lang_invoke_MemberName::_vmindex_offset;
4056
4057 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4058 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4059
4060 int java_lang_invoke_LambdaForm::_vmentry_offset;
4061
4062 #define METHODHANDLE_FIELDS_DO(macro) \
4063 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4064 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
4065
4066 void java_lang_invoke_MethodHandle::compute_offsets() {
4067 InstanceKlass* k = vmClasses::MethodHandle_klass();
4068 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4069 }
4070
4071 #if INCLUDE_CDS
4072 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4073 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4074 }
4075 #endif
4076
4077 #define MEMBERNAME_FIELDS_DO(macro) \
4078 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
4079 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
4080 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
4081 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
4082 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
4083
4084 void java_lang_invoke_MemberName::compute_offsets() {
4085 InstanceKlass* k = vmClasses::MemberName_klass();
4086 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4087 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4088 }
4089
4090 #if INCLUDE_CDS
4091 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4092 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4093 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4094 }
4095 #endif
4096
4097 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4098 macro(_vmholder_offset, k, "vmholder", class_signature, false)
4099
4100 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4101 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4102 assert(k != nullptr, "jdk mismatch");
4103 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4104 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4105 }
4106
4107 #if INCLUDE_CDS
4108 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4109 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4110 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4111 }
4112 #endif
4113
4114 #define LAMBDAFORM_FIELDS_DO(macro) \
4115 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4116
4117 void java_lang_invoke_LambdaForm::compute_offsets() {
4118 InstanceKlass* k = vmClasses::LambdaForm_klass();
4119 assert (k != nullptr, "jdk mismatch");
4120 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4121 }
4122
4123 #if INCLUDE_CDS
4124 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4125 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4126 }
4127 #endif
4128
4129 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4130 return obj != nullptr && is_subclass(obj->klass());
4131 }
4132
4133 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4134 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4135
4136 #define NEP_FIELDS_DO(macro) \
4137 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \
4138 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4139
4140 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4141 return obj != nullptr && is_subclass(obj->klass());
4142 }
4143
4144 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4145 InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4146 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4147 }
4148
4149 #if INCLUDE_CDS
4150 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4151 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4152 }
4153 #endif
4154
4155 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4156 return entry->obj_field(_method_type_offset);
4157 }
4158
4159 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4160 return entry->long_field(_downcall_stub_address_offset);
4161 }
4162
4163 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4164 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4165 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4166 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4167 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4168 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4169 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4170
4171 #define ABIDescriptor_FIELDS_DO(macro) \
4172 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4173 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4174 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4175 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \
4176 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \
4177 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \
4178 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false);
4179
4180 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4181 return obj != nullptr && is_subclass(obj->klass());
4182 }
4183
4184 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4185 InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4186 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4187 }
4188
4189 #if INCLUDE_CDS
4190 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4191 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4192 }
4193 #endif
4194
4195 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4196 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4197 }
4198
4199 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4200 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4201 }
4202
4203 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4204 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4205 }
4206
4207 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4208 return entry->int_field(_stackAlignment_offset);
4209 }
4210
4211 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4212 return entry->int_field(_shadowSpace_offset);
4213 }
4214
4215 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4216 return entry->obj_field(_scratch1_offset);
4217 }
4218
4219 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4220 return entry->obj_field(_scratch2_offset);
4221 }
4222
4223 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4224 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4225 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4226 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4227
4228 #define VMStorage_FIELDS_DO(macro) \
4229 macro(_type_offset, k, "type", byte_signature, false); \
4230 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \
4231 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4232 macro(_debugName_offset, k, "debugName", string_signature, false); \
4233
4234 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4235 return obj != nullptr && is_subclass(obj->klass());
4236 }
4237
4238 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4239 InstanceKlass* k = vmClasses::VMStorage_klass();
4240 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4241 }
4242
4243 #if INCLUDE_CDS
4244 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4245 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4246 }
4247 #endif
4248
4249 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4250 return entry->byte_field(_type_offset);
4251 }
4252
4253 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4254 return entry->int_field(_indexOrOffset_offset);
4255 }
4256
4257 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4258 return entry->short_field(_segmentMaskOrSize_offset);
4259 }
4260
4261 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4262 return entry->obj_field(_debugName_offset);
4263 }
4264
4265 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4266 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4267
4268 #define CallConv_FIELDS_DO(macro) \
4269 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4270 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4271
4272 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4273 return obj != nullptr && is_subclass(obj->klass());
4274 }
4275
4276 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4277 InstanceKlass* k = vmClasses::CallConv_klass();
4278 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4279 }
4280
4281 #if INCLUDE_CDS
4282 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4283 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4284 }
4285 #endif
4286
4287 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4288 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4289 }
4290
4291 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4292 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4293 }
4294
4295 oop java_lang_invoke_MethodHandle::type(oop mh) {
4296 return mh->obj_field(_type_offset);
4297 }
4298
4299 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4300 mh->obj_field_put(_type_offset, mtype);
4301 }
4302
4303 oop java_lang_invoke_MethodHandle::form(oop mh) {
4304 assert(_form_offset != 0, "");
4305 return mh->obj_field(_form_offset);
4306 }
4307
4308 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4309 assert(_form_offset != 0, "");
4310 mh->obj_field_put(_form_offset, lform);
4311 }
4312
4313 /// MemberName accessors
4314
4315 oop java_lang_invoke_MemberName::clazz(oop mname) {
4316 assert(is_instance(mname), "wrong type");
4317 return mname->obj_field(_clazz_offset);
4318 }
4319
4320 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4321 assert(is_instance(mname), "wrong type");
4322 mname->obj_field_put(_clazz_offset, clazz);
4323 }
4324
4325 oop java_lang_invoke_MemberName::name(oop mname) {
4326 assert(is_instance(mname), "wrong type");
4327 return mname->obj_field(_name_offset);
4328 }
4329
4330 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4331 assert(is_instance(mname), "wrong type");
4332 mname->obj_field_put(_name_offset, name);
4333 }
4334
4335 oop java_lang_invoke_MemberName::type(oop mname) {
4336 assert(is_instance(mname), "wrong type");
4337 return mname->obj_field(_type_offset);
4338 }
4339
4340 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4341 assert(is_instance(mname), "wrong type");
4342 mname->obj_field_put(_type_offset, type);
4343 }
4344
4345 int java_lang_invoke_MemberName::flags(oop mname) {
4346 assert(is_instance(mname), "wrong type");
4347 return mname->int_field(_flags_offset);
4348 }
4349
4350 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4351 assert(is_instance(mname), "wrong type");
4352 mname->int_field_put(_flags_offset, flags);
4353 }
4354
4355
4356 // Return vmtarget from ResolvedMethodName method field through indirection
4357 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4358 assert(is_instance(mname), "wrong type");
4359 oop method = mname->obj_field(_method_offset);
4360 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4361 }
4362
4363 bool java_lang_invoke_MemberName::is_method(oop mname) {
4364 assert(is_instance(mname), "must be MemberName");
4365 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4366 }
4367
4368 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4369 assert(is_instance(mname), "wrong type");
4370 mname->obj_field_put(_method_offset, resolved_method);
4371 }
4372
4373 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4374 assert(is_instance(mname), "wrong type");
4375 return (intptr_t) mname->address_field(_vmindex_offset);
4376 }
4377
4378 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4379 assert(is_instance(mname), "wrong type");
4380 mname->address_field_put(_vmindex_offset, (address) index);
4381 }
4382
4383
4384 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4385 assert(is_instance(resolved_method), "wrong type");
4386 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4387 assert(m->is_method(), "must be");
4388 return m;
4389 }
4390
4391 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4392 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4393 assert(is_instance(resolved_method), "wrong type");
4394 resolved_method->address_field_put(_vmtarget_offset, (address)m);
4395 }
4396
4397 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4398 assert(is_instance(resolved_method), "wrong type");
4399 resolved_method->obj_field_put(_vmholder_offset, holder);
4400 }
4401
4402 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4403 const Method* method = m();
4404
4405 // lookup ResolvedMethod oop in the table, or create a new one and intern it
4406 oop resolved_method = ResolvedMethodTable::find_method(method);
4407 if (resolved_method != nullptr) {
4408 return resolved_method;
4409 }
4410
4411 InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4412 if (!k->is_initialized()) {
4413 k->initialize(CHECK_NULL);
4414 }
4415
4416 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4417
4418 NoSafepointVerifier nsv;
4419
4420 if (method->is_old()) {
4421 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4422 method->get_new_method();
4423 }
4424
4425 InstanceKlass* holder = method->method_holder();
4426
4427 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4428 // Add a reference to the loader (actually mirror because hidden classes may not have
4429 // distinct loaders) to ensure the metadata is kept alive.
4430 // This mirror may be different than the one in clazz field.
4431 set_vmholder(new_resolved_method, holder->java_mirror());
4432
4433 // Set flag in class to indicate this InstanceKlass has entries in the table
4434 // to avoid walking table during redefinition if none of the redefined classes
4435 // have any membernames in the table.
4436 holder->set_has_resolved_methods();
4437
4438 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4439 }
4440
4441 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4442 assert(is_instance(lform), "wrong type");
4443 return lform->obj_field(_vmentry_offset);
4444 }
4445
4446
4447 // Support for java_lang_invoke_MethodType
4448
4449 int java_lang_invoke_MethodType::_rtype_offset;
4450 int java_lang_invoke_MethodType::_ptypes_offset;
4451
4452 #define METHODTYPE_FIELDS_DO(macro) \
4453 macro(_rtype_offset, k, "rtype", class_signature, false); \
4454 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4455
4456 void java_lang_invoke_MethodType::compute_offsets() {
4457 InstanceKlass* k = vmClasses::MethodType_klass();
4458 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4459 }
4460
4461 #if INCLUDE_CDS
4462 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4463 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4464 }
4465 #endif
4466
4467 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4468 st->print("(");
4469 objArrayOop pts = ptypes(mt);
4470 if (pts != nullptr) {
4471 for (int i = 0, limit = pts->length(); i < limit; i++) {
4472 java_lang_Class::print_signature(pts->obj_at(i), st);
4473 }
4474 } else {
4475 st->print("null");
4476 }
4477 st->print(")");
4478 oop rt = rtype(mt);
4479 if (rt != nullptr) {
4480 java_lang_Class::print_signature(rt, st);
4481 } else {
4482 st->print("null");
4483 }
4484 }
4485
4486 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4487 ResourceMark rm;
4488 stringStream buffer(128);
4489 print_signature(mt, &buffer);
4490 const char* sigstr = buffer.base();
4491 int siglen = (int) buffer.size();
4492 Symbol *name;
4493 if (!intern_if_not_found) {
4494 name = SymbolTable::probe(sigstr, siglen);
4495 } else {
4496 name = SymbolTable::new_symbol(sigstr, siglen);
4497 }
4498 return name;
4499 }
4500
4501 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4502 if (mt1 == mt2)
4503 return true;
4504 if (rtype(mt1) != rtype(mt2))
4505 return false;
4506 if (ptype_count(mt1) != ptype_count(mt2))
4507 return false;
4508 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4509 if (ptype(mt1, i) != ptype(mt2, i))
4510 return false;
4511 }
4512 return true;
4513 }
4514
4515 oop java_lang_invoke_MethodType::rtype(oop mt) {
4516 assert(is_instance(mt), "must be a MethodType");
4517 return mt->obj_field(_rtype_offset);
4518 }
4519
4520 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4521 assert(is_instance(mt), "must be a MethodType");
4522 return (objArrayOop) mt->obj_field(_ptypes_offset);
4523 }
4524
4525 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4526 return ptypes(mt)->obj_at(idx);
4527 }
4528
4529 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4530 return ptypes(mt)->length();
4531 }
4532
4533 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4534 objArrayOop pts = ptypes(mt);
4535 int count = pts->length();
4536 int slots = 0;
4537 for (int i = 0; i < count; i++) {
4538 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4539 slots += type2size[bt];
4540 }
4541 return slots;
4542 }
4543
4544 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4545 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4546 return type2size[bt];
4547 }
4548
4549
4550 // Support for java_lang_invoke_CallSite
4551
4552 int java_lang_invoke_CallSite::_target_offset;
4553 int java_lang_invoke_CallSite::_context_offset;
4554
4555 #define CALLSITE_FIELDS_DO(macro) \
4556 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
4557 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4558
4559 void java_lang_invoke_CallSite::compute_offsets() {
4560 InstanceKlass* k = vmClasses::CallSite_klass();
4561 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4562 }
4563
4564 #if INCLUDE_CDS
4565 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4566 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4567 }
4568 #endif
4569
4570 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4571 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4572
4573 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4574 return dep_oop;
4575 }
4576
4577 // Support for java_lang_invoke_ConstantCallSite
4578
4579 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4580
4581 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4582 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4583
4584 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4585 InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4586 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4587 }
4588
4589 #if INCLUDE_CDS
4590 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4591 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4592 }
4593 #endif
4594
4595 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4596
4597 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4598 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4599
4600 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4601 InstanceKlass* k = vmClasses::Context_klass();
4602 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4603 }
4604
4605 #if INCLUDE_CDS
4606 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4607 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4608 }
4609 #endif
4610
4611 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4612 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4613 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4614 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4615 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4616 return dep_ctx;
4617 }
4618
4619 // Support for java_security_AccessControlContext
4620
4621 int java_security_AccessControlContext::_context_offset;
4622 int java_security_AccessControlContext::_privilegedContext_offset;
4623 int java_security_AccessControlContext::_isPrivileged_offset;
4624 int java_security_AccessControlContext::_isAuthorized_offset;
4625
4626 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4627 macro(_context_offset, k, "context", protectiondomain_signature, false); \
4628 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4629 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
4630 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
4631
4632 void java_security_AccessControlContext::compute_offsets() {
4633 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4634 InstanceKlass* k = vmClasses::AccessControlContext_klass();
4635 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4636 }
4637
4638 #if INCLUDE_CDS
4639 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4640 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4641 }
4642 #endif
4643
4644 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4645 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4646 assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4647 // Ensure klass is initialized
4648 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4649 // Allocate result
4650 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4651 // Fill in values
4652 result->obj_field_put(_context_offset, context());
4653 result->obj_field_put(_privilegedContext_offset, privileged_context());
4654 result->bool_field_put(_isPrivileged_offset, isPrivileged);
4655 result->bool_field_put(_isAuthorized_offset, true);
4656 return result;
4657 }
4658
4659
4660 // Support for java_lang_ClassLoader
4661
4662 int java_lang_ClassLoader::_loader_data_offset;
4663 int java_lang_ClassLoader::_parallelCapable_offset;
4664 int java_lang_ClassLoader::_name_offset;
4665 int java_lang_ClassLoader::_nameAndId_offset;
4666 int java_lang_ClassLoader::_unnamedModule_offset;
4667 int java_lang_ClassLoader::_parent_offset;
4668
4669 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4670 assert(loader != nullptr, "loader must not be null");
4671 assert(oopDesc::is_oop(loader), "loader must be oop");
4672 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4673 }
4674
4675 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4676 assert(loader != nullptr, "loader must not be null");
4677 assert(oopDesc::is_oop(loader), "loader must be oop");
4678 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4679 }
4680
4681 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4682 assert(loader != nullptr, "loader must not be null");
4683 assert(oopDesc::is_oop(loader), "loader must be oop");
4684 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4685 }
4686
4687 #define CLASSLOADER_FIELDS_DO(macro) \
4688 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4689 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4690 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \
4691 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4692 macro(_parent_offset, k1, "parent", classloader_signature, false)
4693
4694 void java_lang_ClassLoader::compute_offsets() {
4695 InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4696 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4697
4698 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4699 }
4700
4701 #if INCLUDE_CDS
4702 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4703 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4704 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4705 }
4706 #endif
4707
4708 oop java_lang_ClassLoader::parent(oop loader) {
4709 assert(is_instance(loader), "loader must be oop");
4710 return loader->obj_field(_parent_offset);
4711 }
4712
4713 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4714 assert(is_instance(loader), "loader must be oop");
4715 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4716 }
4717
4718 // Returns the name field of this class loader. If the name field has not
4719 // been set, null will be returned.
4720 oop java_lang_ClassLoader::name(oop loader) {
4721 assert(is_instance(loader), "loader must be oop");
4722 return loader->obj_field(_name_offset);
4723 }
4724
4725 // Returns the nameAndId field of this class loader. The format is
4726 // as follows:
4727 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4728 // If the defining loader has no name then <qualified-class-name> @<id>
4729 // If built-in loader, then omit '@<id>' as there is only one instance.
4730 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4731 oop java_lang_ClassLoader::nameAndId(oop loader) {
4732 assert(is_instance(loader), "loader must be oop");
4733 return loader->obj_field(_nameAndId_offset);
4734 }
4735
4736 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4737 assert(is_instance(loader), "loader must be oop");
4738 assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4739 oop acl = loader;
4740 debug_only(jint loop_count = 0);
4741 // This loop taken verbatim from ClassLoader.java:
4742 do {
4743 acl = parent(acl);
4744 if (cl == acl) {
4745 return true;
4746 }
4747 assert(++loop_count > 0, "loop_count overflow");
4748 } while (acl != nullptr);
4749 return false;
4750 }
4751
4752 bool java_lang_ClassLoader::is_instance(oop obj) {
4753 return obj != nullptr && is_subclass(obj->klass());
4754 }
4755
4756
4757 // For class loader classes, parallelCapable defined
4758 // based on non-null field
4759 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4760 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4761 assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4762 return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4763 }
4764
4765 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4766 // Fix for 4474172; see evaluation for more details
4767 loader = non_reflection_class_loader(loader);
4768
4769 oop cl = SystemDictionary::java_system_loader();
4770 while(cl != nullptr) {
4771 if (cl == loader) return true;
4772 cl = parent(cl);
4773 }
4774 return false;
4775 }
4776
4777 // Return true if this is one of the class loaders associated with
4778 // the generated bytecodes for serialization constructor returned
4779 // by sun.reflect.ReflectionFactory::newConstructorForSerialization
4780 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4781 if (loader != nullptr) {
4782 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass();
4783 // This might be null in non-1.4 JDKs
4784 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class));
4785 }
4786 return false;
4787 }
4788
4789 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4790 // See whether this is one of the class loaders associated with
4791 // the generated bytecodes for reflection, and if so, "magically"
4792 // delegate to its parent to prevent class loading from occurring
4793 // in places where applications using reflection didn't expect it.
4794 if (is_reflection_class_loader(loader)) {
4795 return parent(loader);
4796 }
4797 return loader;
4798 }
4799
4800 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4801 assert(is_instance(loader), "loader must be oop");
4802 return loader->obj_field(_unnamedModule_offset);
4803 }
4804
4805 // Support for java_lang_System
4806 //
4807
4808 int java_lang_System::_static_in_offset;
4809 int java_lang_System::_static_out_offset;
4810 int java_lang_System::_static_err_offset;
4811 int java_lang_System::_static_security_offset;
4812 int java_lang_System::_static_allow_security_offset;
4813 int java_lang_System::_static_never_offset;
4814
4815 #define SYSTEM_FIELDS_DO(macro) \
4816 macro(_static_in_offset, k, "in", input_stream_signature, true); \
4817 macro(_static_out_offset, k, "out", print_stream_signature, true); \
4818 macro(_static_err_offset, k, "err", print_stream_signature, true); \
4819 macro(_static_security_offset, k, "security", security_manager_signature, true); \
4820 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4821 macro(_static_never_offset, k, "NEVER", int_signature, true)
4822
4823 void java_lang_System::compute_offsets() {
4824 InstanceKlass* k = vmClasses::System_klass();
4825 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4826 }
4827
4828 // This field tells us that a security manager can never be installed so we
4829 // can completely skip populating the ProtectionDomainCacheTable.
4830 bool java_lang_System::allow_security_manager() {
4831 static int initialized = false;
4832 static bool allowed = true; // default
4833 if (!initialized) {
4834 oop base = vmClasses::System_klass()->static_field_base_raw();
4835 int never = base->int_field(_static_never_offset);
4836 allowed = (base->int_field(_static_allow_security_offset) != never);
4837 initialized = true;
4838 }
4839 return allowed;
4840 }
4841
4842 // This field tells us that a security manager is installed.
4843 bool java_lang_System::has_security_manager() {
4844 oop base = vmClasses::System_klass()->static_field_base_raw();
4845 return base->obj_field(_static_security_offset) != nullptr;
4846 }
4847
4848 #if INCLUDE_CDS
4849 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4850 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4851 }
4852 #endif
4853
4854 // Support for jdk_internal_misc_UnsafeConstants
4855 //
4856 class UnsafeConstantsFixup : public FieldClosure {
4857 private:
4858 int _address_size;
4859 int _page_size;
4860 bool _big_endian;
4861 bool _use_unaligned_access;
4862 int _data_cache_line_flush_size;
4863 public:
4864 UnsafeConstantsFixup() {
4865 // round up values for all static final fields
4866 _address_size = sizeof(void*);
4867 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4868 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4869 _use_unaligned_access = UseUnalignedAccesses;
4870 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4871 }
4872
4873 void do_field(fieldDescriptor* fd) {
4874 oop mirror = fd->field_holder()->java_mirror();
4875 assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4876 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4877 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4878 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4879 if (fd->name() == vmSymbols::address_size_name()) {
4880 mirror->int_field_put(fd->offset(), _address_size);
4881 } else if (fd->name() == vmSymbols::page_size_name()) {
4882 mirror->int_field_put(fd->offset(), _page_size);
4883 } else if (fd->name() == vmSymbols::big_endian_name()) {
4884 mirror->bool_field_put(fd->offset(), _big_endian);
4885 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4886 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4887 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4888 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4889 } else {
4890 assert(false, "unexpected UnsafeConstants field");
4891 }
4892 }
4893 };
4894
4895 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4896 UnsafeConstantsFixup fixup;
4897 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4898 }
4899
4900
4901 // java_lang_StackTraceElement
4902
4903 int java_lang_StackTraceElement::_methodName_offset;
4904 int java_lang_StackTraceElement::_fileName_offset;
4905 int java_lang_StackTraceElement::_lineNumber_offset;
4906 int java_lang_StackTraceElement::_moduleName_offset;
4907 int java_lang_StackTraceElement::_moduleVersion_offset;
4908 int java_lang_StackTraceElement::_classLoaderName_offset;
4909 int java_lang_StackTraceElement::_declaringClass_offset;
4910 int java_lang_StackTraceElement::_declaringClassObject_offset;
4911
4912 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4913 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4914 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4915 macro(_moduleName_offset, k, "moduleName", string_signature, false); \
4916 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4917 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \
4918 macro(_methodName_offset, k, "methodName", string_signature, false); \
4919 macro(_fileName_offset, k, "fileName", string_signature, false); \
4920 macro(_lineNumber_offset, k, "lineNumber", int_signature, false)
4921
4922 // Support for java_lang_StackTraceElement
4923 void java_lang_StackTraceElement::compute_offsets() {
4924 InstanceKlass* k = vmClasses::StackTraceElement_klass();
4925 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4926 }
4927
4928 #if INCLUDE_CDS
4929 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4930 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4931 }
4932 #endif
4933
4934 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4935 element->obj_field_put(_fileName_offset, value);
4936 }
4937
4938 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4939 element->obj_field_put(_declaringClass_offset, value);
4940 }
4941
4942 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4943 element->obj_field_put(_methodName_offset, value);
4944 }
4945
4946 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4947 element->int_field_put(_lineNumber_offset, value);
4948 }
4949
4950 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4951 element->obj_field_put(_moduleName_offset, value);
4952 }
4953
4954 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4955 element->obj_field_put(_moduleVersion_offset, value);
4956 }
4957
4958 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4959 element->obj_field_put(_classLoaderName_offset, value);
4960 }
4961
4962 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4963 element->obj_field_put(_declaringClassObject_offset, value);
4964 }
4965
4966
4967 // java_lang_AssertionStatusDirectives
4968
4969 int java_lang_AssertionStatusDirectives::_classes_offset;
4970 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4971 int java_lang_AssertionStatusDirectives::_packages_offset;
4972 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4973 int java_lang_AssertionStatusDirectives::_deflt_offset;
4974
4975 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4976 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4977 macro(_classes_offset, k, "classes", string_array_signature, false); \
4978 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4979 macro(_packages_offset, k, "packages", string_array_signature, false); \
4980 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4981 macro(_deflt_offset, k, "deflt", bool_signature, false)
4982
4983 void java_lang_AssertionStatusDirectives::compute_offsets() {
4984 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
4985 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4986 }
4987
4988 #if INCLUDE_CDS
4989 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4990 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4991 }
4992 #endif
4993
4994 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4995 o->obj_field_put(_classes_offset, val);
4996 }
4997
4998 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4999 o->obj_field_put(_classEnabled_offset, val);
5000 }
5001
5002 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5003 o->obj_field_put(_packages_offset, val);
5004 }
5005
5006 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5007 o->obj_field_put(_packageEnabled_offset, val);
5008 }
5009
5010 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5011 o->bool_field_put(_deflt_offset, val);
5012 }
5013
5014 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5015
5016 #define AOS_FIELDS_DO(macro) \
5017 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5018
5019 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5020 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5021 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5022 }
5023
5024 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5025 assert(_owner_offset != 0, "Must be initialized");
5026 return obj->obj_field(_owner_offset);
5027 }
5028
5029 #if INCLUDE_CDS
5030 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5031 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5032 }
5033 #endif
5034
5035 int vector_VectorPayload::_payload_offset;
5036
5037 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5038 macro(_payload_offset, k, "payload", object_signature, false)
5039
5040 void vector_VectorPayload::compute_offsets() {
5041 InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5042 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5043 }
5044
5045 #if INCLUDE_CDS
5046 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5047 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5048 }
5049 #endif
5050
5051 void vector_VectorPayload::set_payload(oop o, oop val) {
5052 o->obj_field_put(_payload_offset, val);
5053 }
5054
5055 bool vector_VectorPayload::is_instance(oop obj) {
5056 return obj != nullptr && is_subclass(obj->klass());
5057 }
5058
5059 int java_lang_Integer_IntegerCache::_static_cache_offset;
5060 int java_lang_Long_LongCache::_static_cache_offset;
5061 int java_lang_Character_CharacterCache::_static_cache_offset;
5062 int java_lang_Short_ShortCache::_static_cache_offset;
5063 int java_lang_Byte_ByteCache::_static_cache_offset;
5064
5065 #define INTEGER_CACHE_FIELDS_DO(macro) \
5066 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5067
5068 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5069 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5070 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5071 }
5072
5073 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5074 oop base = ik->static_field_base_raw();
5075 return objArrayOop(base->obj_field(_static_cache_offset));
5076 }
5077
5078 Symbol* java_lang_Integer_IntegerCache::symbol() {
5079 return vmSymbols::java_lang_Integer_IntegerCache();
5080 }
5081
5082 #if INCLUDE_CDS
5083 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5084 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5085 }
5086 #endif
5087 #undef INTEGER_CACHE_FIELDS_DO
5088
5089 jint java_lang_Integer::value(oop obj) {
5090 jvalue v;
5091 java_lang_boxing_object::get_value(obj, &v);
5092 return v.i;
5093 }
5094
5095 #define LONG_CACHE_FIELDS_DO(macro) \
5096 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5097
5098 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5099 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5100 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5101 }
5102
5103 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5104 oop base = ik->static_field_base_raw();
5105 return objArrayOop(base->obj_field(_static_cache_offset));
5106 }
5107
5108 Symbol* java_lang_Long_LongCache::symbol() {
5109 return vmSymbols::java_lang_Long_LongCache();
5110 }
5111
5112 #if INCLUDE_CDS
5113 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5114 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5115 }
5116 #endif
5117 #undef LONG_CACHE_FIELDS_DO
5118
5119 jlong java_lang_Long::value(oop obj) {
5120 jvalue v;
5121 java_lang_boxing_object::get_value(obj, &v);
5122 return v.j;
5123 }
5124
5125 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5126 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5127
5128 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5129 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5130 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5131 }
5132
5133 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5134 oop base = ik->static_field_base_raw();
5135 return objArrayOop(base->obj_field(_static_cache_offset));
5136 }
5137
5138 Symbol* java_lang_Character_CharacterCache::symbol() {
5139 return vmSymbols::java_lang_Character_CharacterCache();
5140 }
5141
5142 #if INCLUDE_CDS
5143 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5144 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5145 }
5146 #endif
5147 #undef CHARACTER_CACHE_FIELDS_DO
5148
5149 jchar java_lang_Character::value(oop obj) {
5150 jvalue v;
5151 java_lang_boxing_object::get_value(obj, &v);
5152 return v.c;
5153 }
5154
5155 #define SHORT_CACHE_FIELDS_DO(macro) \
5156 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5157
5158 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5159 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5160 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5161 }
5162
5163 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5164 oop base = ik->static_field_base_raw();
5165 return objArrayOop(base->obj_field(_static_cache_offset));
5166 }
5167
5168 Symbol* java_lang_Short_ShortCache::symbol() {
5169 return vmSymbols::java_lang_Short_ShortCache();
5170 }
5171
5172 #if INCLUDE_CDS
5173 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5174 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5175 }
5176 #endif
5177 #undef SHORT_CACHE_FIELDS_DO
5178
5179 jshort java_lang_Short::value(oop obj) {
5180 jvalue v;
5181 java_lang_boxing_object::get_value(obj, &v);
5182 return v.s;
5183 }
5184
5185 #define BYTE_CACHE_FIELDS_DO(macro) \
5186 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5187
5188 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5189 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5190 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5191 }
5192
5193 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5194 oop base = ik->static_field_base_raw();
5195 return objArrayOop(base->obj_field(_static_cache_offset));
5196 }
5197
5198 Symbol* java_lang_Byte_ByteCache::symbol() {
5199 return vmSymbols::java_lang_Byte_ByteCache();
5200 }
5201
5202 #if INCLUDE_CDS
5203 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5204 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5205 }
5206 #endif
5207 #undef BYTE_CACHE_FIELDS_DO
5208
5209 jbyte java_lang_Byte::value(oop obj) {
5210 jvalue v;
5211 java_lang_boxing_object::get_value(obj, &v);
5212 return v.b;
5213 }
5214
5215 int java_lang_Boolean::_static_TRUE_offset;
5216 int java_lang_Boolean::_static_FALSE_offset;
5217
5218 #define BOOLEAN_FIELDS_DO(macro) \
5219 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5220 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5221
5222
5223 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5224 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5225 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5226 }
5227
5228 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5229 oop base = ik->static_field_base_raw();
5230 return base->obj_field(_static_TRUE_offset);
5231 }
5232
5233 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5234 oop base = ik->static_field_base_raw();
5235 return base->obj_field(_static_FALSE_offset);
5236 }
5237
5238 Symbol* java_lang_Boolean::symbol() {
5239 return vmSymbols::java_lang_Boolean();
5240 }
5241
5242 #if INCLUDE_CDS
5243 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5244 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5245 }
5246 #endif
5247 #undef BOOLEAN_CACHE_FIELDS_DO
5248
5249 jboolean java_lang_Boolean::value(oop obj) {
5250 jvalue v;
5251 java_lang_boxing_object::get_value(obj, &v);
5252 return v.z;
5253 }
5254
5255 // java_lang_reflect_RecordComponent
5256
5257 int java_lang_reflect_RecordComponent::_clazz_offset;
5258 int java_lang_reflect_RecordComponent::_name_offset;
5259 int java_lang_reflect_RecordComponent::_type_offset;
5260 int java_lang_reflect_RecordComponent::_accessor_offset;
5261 int java_lang_reflect_RecordComponent::_signature_offset;
5262 int java_lang_reflect_RecordComponent::_annotations_offset;
5263 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5264
5265 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5266 macro(_clazz_offset, k, "clazz", class_signature, false); \
5267 macro(_name_offset, k, "name", string_signature, false); \
5268 macro(_type_offset, k, "type", class_signature, false); \
5269 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \
5270 macro(_signature_offset, k, "signature", string_signature, false); \
5271 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \
5272 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5273
5274 // Support for java_lang_reflect_RecordComponent
5275 void java_lang_reflect_RecordComponent::compute_offsets() {
5276 InstanceKlass* k = vmClasses::RecordComponent_klass();
5277 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5278 }
5279
5280 #if INCLUDE_CDS
5281 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5282 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5283 }
5284 #endif
5285
5286 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5287 element->obj_field_put(_clazz_offset, value);
5288 }
5289
5290 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5291 element->obj_field_put(_name_offset, value);
5292 }
5293
5294 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5295 element->obj_field_put(_type_offset, value);
5296 }
5297
5298 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5299 element->obj_field_put(_accessor_offset, value);
5300 }
5301
5302 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5303 element->obj_field_put(_signature_offset, value);
5304 }
5305
5306 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5307 element->obj_field_put(_annotations_offset, value);
5308 }
5309
5310 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5311 element->obj_field_put(_typeAnnotations_offset, value);
5312 }
5313
5314 // java_lang_InternalError
5315 int java_lang_InternalError::_during_unsafe_access_offset;
5316
5317 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5318 internal_error->bool_field_put(_during_unsafe_access_offset, true);
5319 }
5320
5321 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5322 return internal_error->bool_field(_during_unsafe_access_offset);
5323 }
5324
5325 void java_lang_InternalError::compute_offsets() {
5326 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5327 }
5328
5329 #if INCLUDE_CDS
5330 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5331 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5332 }
5333 #endif
5334
5335 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5336 f(java_lang_Class) \
5337 f(java_lang_String) \
5338 f(java_lang_ref_Reference) \
5339 //end
5340
5341 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5342 f(java_lang_System) \
5343 f(java_lang_ClassLoader) \
5344 f(java_lang_Throwable) \
5345 f(java_lang_Thread) \
5346 f(java_lang_Thread_FieldHolder) \
5347 f(java_lang_Thread_Constants) \
5348 f(java_lang_ThreadGroup) \
5349 f(java_lang_VirtualThread) \
5350 f(java_lang_InternalError) \
5351 f(java_lang_AssertionStatusDirectives) \
5352 f(java_lang_ref_SoftReference) \
5353 f(java_lang_invoke_MethodHandle) \
5354 f(java_lang_invoke_DirectMethodHandle) \
5355 f(java_lang_invoke_MemberName) \
5356 f(java_lang_invoke_ResolvedMethodName) \
5357 f(java_lang_invoke_LambdaForm) \
5358 f(java_lang_invoke_MethodType) \
5359 f(java_lang_invoke_CallSite) \
5360 f(java_lang_invoke_ConstantCallSite) \
5361 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5362 f(java_security_AccessControlContext) \
5363 f(java_lang_reflect_AccessibleObject) \
5364 f(java_lang_reflect_Method) \
5365 f(java_lang_reflect_Constructor) \
5366 f(java_lang_reflect_Field) \
5367 f(java_lang_reflect_RecordComponent) \
5368 f(reflect_ConstantPool) \
5369 f(java_lang_reflect_Parameter) \
5370 f(java_lang_Module) \
5371 f(java_lang_StackTraceElement) \
5372 f(java_lang_ClassFrameInfo) \
5373 f(java_lang_StackFrameInfo) \
5374 f(java_lang_LiveStackFrameInfo) \
5375 f(jdk_internal_vm_ContinuationScope) \
5376 f(jdk_internal_vm_Continuation) \
5377 f(jdk_internal_vm_StackChunk) \
5378 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5379 f(jdk_internal_foreign_abi_NativeEntryPoint) \
5380 f(jdk_internal_foreign_abi_ABIDescriptor) \
5381 f(jdk_internal_foreign_abi_VMStorage) \
5382 f(jdk_internal_foreign_abi_CallConv) \
5383 f(jdk_internal_misc_UnsafeConstants) \
5384 f(java_lang_boxing_object) \
5385 f(vector_VectorPayload) \
5386 //end
5387
5388 #define BASIC_JAVA_CLASSES_DO(f) \
5389 BASIC_JAVA_CLASSES_DO_PART1(f) \
5390 BASIC_JAVA_CLASSES_DO_PART2(f)
5391
5392 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5393
5394 // Compute field offsets of all the classes in this file
5395 void JavaClasses::compute_offsets() {
5396 if (CDSConfig::is_using_archive()) {
5397 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5398 JvmtiExport::has_early_class_hook_env()),
5399 "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5400 // None of the classes used by the rest of this function can be replaced by
5401 // JVMTI ClassFileLoadHook.
5402 // We are safe to use the archived offsets, which have already been restored
5403 // by JavaClasses::serialize_offsets, without computing the offsets again.
5404 return;
5405 }
5406
5407 // We have already called the compute_offsets() of the
5408 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5409 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5410 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5411 }
5412
5413 #if INCLUDE_CDS
5414 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5415
5416 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5417 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5418 }
5419 #endif
5420
5421 #if INCLUDE_CDS_JAVA_HEAP
5422 bool JavaClasses::is_supported_for_archiving(oop obj) {
5423 Klass* klass = obj->klass();
5424
5425 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed.
5426 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5427 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5428 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5429 // So for now we cannot not support these classes for archiving.
5430 //
5431 // These objects typically are not referenced by static fields, but rather by resolved
5432 // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5433 klass == vmClasses::ResolvedMethodName_klass() ||
5434 klass == vmClasses::MemberName_klass() ||
5435 klass == vmClasses::Context_klass() ||
5436 // It's problematic to archive Reference objects. One of the reasons is that
5437 // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5438 klass->is_subclass_of(vmClasses::Reference_klass())) {
5439 return false;
5440 }
5441
5442 return true;
5443 }
5444 #endif
5445
5446 #ifndef PRODUCT
5447
5448 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5449
5450 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5451 const char* field_sig) {
5452 EXCEPTION_MARK;
5453 fieldDescriptor fd;
5454 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5455 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5456 InstanceKlass* ik = InstanceKlass::cast(k);
5457 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5458 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
5459 if (!ik->find_local_field(f_name, f_sig, &fd)) {
5460 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5461 return false;
5462 }
5463 if (fd.is_static()) {
5464 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5465 return false;
5466 }
5467 if (fd.offset() == deserialized_offset ) {
5468 return true;
5469 } else {
5470 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5471 klass_name, field_name, deserialized_offset, fd.offset());
5472 return false;
5473 }
5474 }
5475
5476 void JavaClasses::check_offsets() {
5477 bool valid = true;
5478
5479 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5480 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5481
5482 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5483 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5484
5485 // Boxed primitive objects (java_lang_boxing_object)
5486
5487 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
5488 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5489 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
5490 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5491 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
5492 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
5493 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
5494 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5495
5496 if (!valid) vm_exit_during_initialization("Field offset verification failed");
5497 }
5498
5499 #endif // PRODUCT
5500
5501 int InjectedField::compute_offset() {
5502 InstanceKlass* ik = InstanceKlass::cast(klass());
5503 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5504 if (!may_be_java && !fs.field_flags().is_injected()) {
5505 // Only look at injected fields
5506 continue;
5507 }
5508 if (fs.name() == name() && fs.signature() == signature()) {
5509 return fs.offset();
5510 }
5511 }
5512 ResourceMark rm;
5513 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)" : "");
5514 #ifndef PRODUCT
5515 ik->print();
5516 tty->print_cr("all fields:");
5517 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5518 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5519 }
5520 #endif //PRODUCT
5521 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5522 return -1;
5523 }
5524
5525 void javaClasses_init() {
5526 JavaClasses::compute_offsets();
5527 JavaClasses::check_offsets();
5528 FilteredFieldsMap::initialize(); // must be done after computing offsets.
5529 }