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