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