1 /*
2 * Copyright (c) 1997, 2019, 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 "classfile/altHashing.hpp"
27 #include "classfile/classLoaderData.inline.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/vmSymbols.hpp"
33 #include "code/debugInfo.hpp"
34 #include "code/dependencyContext.hpp"
35 #include "code/pcDesc.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/heapShared.inline.hpp"
41 #include "memory/metaspaceShared.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/fieldStreams.hpp"
46 #include "oops/instanceKlass.hpp"
47 #include "oops/instanceMirrorKlass.hpp"
48 #include "oops/klass.hpp"
49 #include "oops/method.inline.hpp"
50 #include "oops/objArrayOop.inline.hpp"
51 #include "oops/oop.inline.hpp"
52 #include "oops/symbol.hpp"
53 #include "oops/typeArrayOop.inline.hpp"
54 #include "oops/valueArrayKlass.hpp"
55 #include "oops/valueKlass.inline.hpp"
56 #include "prims/jvmtiExport.hpp"
57 #include "prims/resolvedMethodTable.hpp"
58 #include "runtime/fieldDescriptor.inline.hpp"
59 #include "runtime/frame.inline.hpp"
60 #include "runtime/handles.inline.hpp"
61 #include "runtime/interfaceSupport.inline.hpp"
62 #include "runtime/java.hpp"
63 #include "runtime/javaCalls.hpp"
64 #include "runtime/jniHandles.inline.hpp"
65 #include "runtime/safepoint.hpp"
66 #include "runtime/safepointVerifiers.hpp"
67 #include "runtime/thread.inline.hpp"
68 #include "runtime/vframe.inline.hpp"
69 #include "runtime/vm_version.hpp"
70 #include "utilities/align.hpp"
71 #include "utilities/preserveException.hpp"
72 #include "utilities/utf8.hpp"
73 #if INCLUDE_JVMCI
74 #include "jvmci/jvmciJavaClasses.hpp"
75 #endif
76
77 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
78 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
79
80 #if INCLUDE_CDS
81 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
82 f->do_u4((u4*)&_##name##_offset);
83 #endif
84
85 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
86 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
87
88 InjectedField JavaClasses::_injected_fields[] = {
89 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
90 };
91
92 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
93 return _injected_fields[id].compute_offset();
94 }
95
96 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
97 *field_count = 0;
98
99 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
100 if (sid == vmSymbols::NO_SID) {
101 // Only well known classes can inject fields
102 return NULL;
103 }
104
105 int count = 0;
106 int start = -1;
107
108 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
109 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
110 count++; \
111 if (start == -1) start = klass##_##name##_enum; \
112 }
113 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
114 #undef LOOKUP_INJECTED_FIELD
115
116 if (start != -1) {
117 *field_count = count;
118 return _injected_fields + start;
119 }
120 return NULL;
121 }
122
123
124 // Helpful routine for computing field offsets at run time rather than hardcoding them
125 // Finds local fields only, including static fields. Static field offsets are from the
126 // beginning of the mirror.
127 static void compute_offset(int &dest_offset,
128 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
129 bool is_static = false) {
130 fieldDescriptor fd;
131 if (ik == NULL) {
132 ResourceMark rm;
133 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
134 vm_exit_during_initialization("Invalid layout of well-known class");
135 }
136
137 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
138 ResourceMark rm;
139 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
140 name_symbol->as_C_string(), signature_symbol->as_C_string());
141 #ifndef PRODUCT
142 // Prints all fields and offsets
143 Log(class) lt;
144 LogStream ls(lt.error());
145 ik->print_on(&ls);
146 #endif //PRODUCT
147 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
148 }
149 dest_offset = fd.offset();
150 }
151
152 // Overloading to pass name as a string.
153 static void compute_offset(int& dest_offset, InstanceKlass* ik,
154 const char* name_string, Symbol* signature_symbol,
155 bool is_static = false) {
156 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
157 if (name == NULL) {
158 ResourceMark rm;
159 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
160 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
161 }
162 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
163 }
164
165 int java_lang_String::value_offset = 0;
166 int java_lang_String::hash_offset = 0;
167 int java_lang_String::hashIsZero_offset = 0;
168 int java_lang_String::coder_offset = 0;
169
170 bool java_lang_String::initialized = false;
171
172 bool java_lang_String::is_instance(oop obj) {
173 return is_instance_inlined(obj);
174 }
175
176 #if INCLUDE_CDS
177 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
178 f->do_u4((u4*)&offset)
179 #endif
180
181 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
182 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
183
184 #define STRING_FIELDS_DO(macro) \
185 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
186 macro(hash_offset, k, "hash", int_signature, false); \
187 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
188 macro(coder_offset, k, "coder", byte_signature, false);
189
190 void java_lang_String::compute_offsets() {
191 if (initialized) {
192 return;
193 }
194
195 InstanceKlass* k = SystemDictionary::String_klass();
196 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
197
198 initialized = true;
199 }
200
201 #if INCLUDE_CDS
202 void java_lang_String::serialize_offsets(SerializeClosure* f) {
203 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
204 f->do_bool(&initialized);
205 }
206 #endif
207
208 class CompactStringsFixup : public FieldClosure {
209 private:
210 bool _value;
211
212 public:
213 CompactStringsFixup(bool value) : _value(value) {}
214
215 void do_field(fieldDescriptor* fd) {
216 if (fd->name() == vmSymbols::compact_strings_name()) {
217 oop mirror = fd->field_holder()->java_mirror();
218 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
219 assert(mirror != NULL, "String must have mirror already");
220 mirror->bool_field_put(fd->offset(), _value);
221 }
222 }
223 };
224
225 void java_lang_String::set_compact_strings(bool value) {
226 CompactStringsFixup fix(value);
227 SystemDictionary::String_klass()->do_local_static_fields(&fix);
228 }
229
230 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
231 assert(initialized, "Must be initialized");
232 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
233
234 // Create the String object first, so there's a chance that the String
235 // and the char array it points to end up in the same cache line.
236 oop obj;
237 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
238
239 // Create the char array. The String object must be handlized here
240 // because GC can happen as a result of the allocation attempt.
241 Handle h_obj(THREAD, obj);
242 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
243 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
244
245 // Point the String at the char array
246 obj = h_obj();
247 set_value(obj, buffer);
248 // No need to zero the offset, allocation zero'ed the entire String object
249 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
250 return h_obj;
251 }
252
253 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
254 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
255 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
256 typeArrayOop buffer = value(h_obj());
257 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
258 if (is_latin1) {
259 for (int index = 0; index < length; index++) {
260 buffer->byte_at_put(index, (jbyte)unicode[index]);
261 }
262 } else {
263 for (int index = 0; index < length; index++) {
264 buffer->char_at_put(index, unicode[index]);
265 }
266 }
267
268 #ifdef ASSERT
269 {
270 ResourceMark rm;
271 char* expected = UNICODE::as_utf8(unicode, length);
272 char* actual = as_utf8_string(h_obj());
273 if (strcmp(expected, actual) != 0) {
274 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
275 ShouldNotReachHere();
276 }
277 }
278 #endif
279
280 return h_obj;
281 }
282
283 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
284 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
285 return h_obj();
286 }
287
288 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
289 if (utf8_str == NULL) {
290 return Handle();
291 }
292 bool has_multibyte, is_latin1;
293 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
294 if (!CompactStrings) {
295 has_multibyte = true;
296 is_latin1 = false;
297 }
298
299 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
300 if (length > 0) {
301 if (!has_multibyte) {
302 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
303 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
304 } else if (is_latin1) {
305 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
306 } else {
307 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
308 }
309 }
310
311 #ifdef ASSERT
312 // This check is too strict because the input string is not necessarily valid UTF8.
313 // For example, it may be created with arbitrary content via jni_NewStringUTF.
314 /*
315 {
316 ResourceMark rm;
317 const char* expected = utf8_str;
318 char* actual = as_utf8_string(h_obj());
319 if (strcmp(expected, actual) != 0) {
320 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
321 ShouldNotReachHere();
322 }
323 }
324 */
325 #endif
326
327 return h_obj;
328 }
329
330 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
331 Handle h_obj = create_from_str(utf8_str, CHECK_0);
332 return h_obj();
333 }
334
335 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
336 const char* utf8_str = (char*)symbol->bytes();
337 int utf8_len = symbol->utf8_length();
338
339 bool has_multibyte, is_latin1;
340 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
341 if (!CompactStrings) {
342 has_multibyte = true;
343 is_latin1 = false;
344 }
345
346 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
347 if (length > 0) {
348 if (!has_multibyte) {
349 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
350 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
351 } else if (is_latin1) {
352 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
353 } else {
354 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
355 }
356 }
357
358 #ifdef ASSERT
359 {
360 ResourceMark rm;
361 const char* expected = symbol->as_utf8();
362 char* actual = as_utf8_string(h_obj());
363 if (strncmp(expected, actual, utf8_len) != 0) {
364 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
365 ShouldNotReachHere();
366 }
367 }
368 #endif
369
370 return h_obj;
371 }
372
373 // Converts a C string to a Java String based on current encoding
374 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
375 assert(str != NULL, "bad arguments");
376
377 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
378 static to_java_string_fn_t _to_java_string_fn = NULL;
379
380 if (_to_java_string_fn == NULL) {
381 void *lib_handle = os::native_java_library();
382 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
383 if (_to_java_string_fn == NULL) {
384 fatal("NewStringPlatform missing");
385 }
386 }
387
388 jstring js = NULL;
389 { JavaThread* thread = (JavaThread*)THREAD;
390 assert(thread->is_Java_thread(), "must be java thread");
391 HandleMark hm(thread);
392 ThreadToNativeFromVM ttn(thread);
393 js = (_to_java_string_fn)(thread->jni_environment(), str);
394 }
395 return Handle(THREAD, JNIHandles::resolve(js));
396 }
397
398 // Converts a Java String to a native C string that can be used for
399 // native OS calls.
400 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
401 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
402 static to_platform_string_fn_t _to_platform_string_fn = NULL;
403
404 if (_to_platform_string_fn == NULL) {
405 void *lib_handle = os::native_java_library();
406 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
407 if (_to_platform_string_fn == NULL) {
408 fatal("GetStringPlatformChars missing");
409 }
410 }
411
412 char *native_platform_string;
413 { JavaThread* thread = (JavaThread*)THREAD;
414 assert(thread->is_Java_thread(), "must be java thread");
415 JNIEnv *env = thread->jni_environment();
416 jstring js = (jstring) JNIHandles::make_local(env, java_string());
417 bool is_copy;
418 HandleMark hm(thread);
419 ThreadToNativeFromVM ttn(thread);
420 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
421 assert(is_copy == JNI_TRUE, "is_copy value changed");
422 JNIHandles::destroy_local(js);
423 }
424 return native_platform_string;
425 }
426
427 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
428 oop obj = java_string();
429 // Typical usage is to convert all '/' to '.' in string.
430 typeArrayOop value = java_lang_String::value(obj);
431 int length = java_lang_String::length(obj, value);
432 bool is_latin1 = java_lang_String::is_latin1(obj);
433
434 // First check if any from_char exist
435 int index; // Declared outside, used later
436 for (index = 0; index < length; index++) {
437 jchar c = !is_latin1 ? value->char_at(index) :
438 ((jchar) value->byte_at(index)) & 0xff;
439 if (c == from_char) {
440 break;
441 }
442 }
443 if (index == length) {
444 // No from_char, so do not copy.
445 return java_string;
446 }
447
448 // Check if result string will be latin1
449 bool to_is_latin1 = false;
450
451 // Replacement char must be latin1
452 if (CompactStrings && UNICODE::is_latin1(to_char)) {
453 if (is_latin1) {
454 // Source string is latin1 as well
455 to_is_latin1 = true;
456 } else if (!UNICODE::is_latin1(from_char)) {
457 // We are replacing an UTF16 char. Scan string to
458 // check if result can be latin1 encoded.
459 to_is_latin1 = true;
460 for (index = 0; index < length; index++) {
461 jchar c = value->char_at(index);
462 if (c != from_char && !UNICODE::is_latin1(c)) {
463 to_is_latin1 = false;
464 break;
465 }
466 }
467 }
468 }
469
470 // Create new UNICODE (or byte) buffer. Must handlize value because GC
471 // may happen during String and char array creation.
472 typeArrayHandle h_value(THREAD, value);
473 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
474 typeArrayOop from_buffer = h_value();
475 typeArrayOop to_buffer = java_lang_String::value(string());
476
477 // Copy contents
478 for (index = 0; index < length; index++) {
479 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
480 ((jchar) from_buffer->byte_at(index)) & 0xff;
481 if (c == from_char) {
482 c = to_char;
483 }
484 if (!to_is_latin1) {
485 to_buffer->char_at_put(index, c);
486 } else {
487 to_buffer->byte_at_put(index, (jbyte) c);
488 }
489 }
490 return string;
491 }
492
493 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
494 typeArrayOop value = java_lang_String::value(java_string);
495 length = java_lang_String::length(java_string, value);
496 bool is_latin1 = java_lang_String::is_latin1(java_string);
497
498 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
499 if (result != NULL) {
500 if (!is_latin1) {
501 for (int index = 0; index < length; index++) {
502 result[index] = value->char_at(index);
503 }
504 } else {
505 for (int index = 0; index < length; index++) {
506 result[index] = ((jchar) value->byte_at(index)) & 0xff;
507 }
508 }
509 } else {
510 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
511 }
512 return result;
513 }
514
515 unsigned int java_lang_String::hash_code(oop java_string) {
516 // The hash and hashIsZero fields are subject to a benign data race,
517 // making it crucial to ensure that any observable result of the
518 // calculation in this method stays correct under any possible read of
519 // these fields. Necessary restrictions to allow this to be correct
520 // without explicit memory fences or similar concurrency primitives is
521 // that we can ever only write to one of these two fields for a given
522 // String instance, and that the computation is idempotent and derived
523 // from immutable state
524 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized");
525 if (java_lang_String::hash_is_set(java_string)) {
526 return java_string->int_field(hash_offset);
527 }
528
529 typeArrayOop value = java_lang_String::value(java_string);
530 int length = java_lang_String::length(java_string, value);
531 bool is_latin1 = java_lang_String::is_latin1(java_string);
532
533 unsigned int hash = 0;
534 if (length > 0) {
535 if (is_latin1) {
536 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
537 } else {
538 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
539 }
540 }
541
542 if (hash != 0) {
543 java_string->int_field_put(hash_offset, hash);
544 } else {
545 java_string->bool_field_put(hashIsZero_offset, true);
546 }
547 return hash;
548 }
549
550 char* java_lang_String::as_quoted_ascii(oop java_string) {
551 typeArrayOop value = java_lang_String::value(java_string);
552 int length = java_lang_String::length(java_string, value);
553 bool is_latin1 = java_lang_String::is_latin1(java_string);
554
555 if (length == 0) return NULL;
556
557 char* result;
558 int result_length;
559 if (!is_latin1) {
560 jchar* base = value->char_at_addr(0);
561 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
562 result = NEW_RESOURCE_ARRAY(char, result_length);
563 UNICODE::as_quoted_ascii(base, length, result, result_length);
564 } else {
565 jbyte* base = value->byte_at_addr(0);
566 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
567 result = NEW_RESOURCE_ARRAY(char, result_length);
568 UNICODE::as_quoted_ascii(base, length, result, result_length);
569 }
570 assert(result_length >= length + 1, "must not be shorter");
571 assert(result_length == (int)strlen(result) + 1, "must match");
572 return result;
573 }
574
575 Symbol* java_lang_String::as_symbol(oop java_string) {
576 typeArrayOop value = java_lang_String::value(java_string);
577 int length = java_lang_String::length(java_string, value);
578 bool is_latin1 = java_lang_String::is_latin1(java_string);
579 if (!is_latin1) {
580 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
581 Symbol* sym = SymbolTable::new_symbol(base, length);
582 return sym;
583 } else {
584 ResourceMark rm;
585 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
586 const char* base = UNICODE::as_utf8(position, length);
587 Symbol* sym = SymbolTable::new_symbol(base, length);
588 return sym;
589 }
590 }
591
592 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
593 typeArrayOop value = java_lang_String::value(java_string);
594 int length = java_lang_String::length(java_string, value);
595 bool is_latin1 = java_lang_String::is_latin1(java_string);
596 if (!is_latin1) {
597 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
598 return SymbolTable::probe_unicode(base, length);
599 } else {
600 ResourceMark rm;
601 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
602 const char* base = UNICODE::as_utf8(position, length);
603 return SymbolTable::probe(base, length);
604 }
605 }
606
607 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
608 assert(value_equals(value, java_lang_String::value(java_string)),
609 "value must be same as java_lang_String::value(java_string)");
610 int length = java_lang_String::length(java_string, value);
611 if (length == 0) {
612 return 0;
613 }
614 if (!java_lang_String::is_latin1(java_string)) {
615 return UNICODE::utf8_length(value->char_at_addr(0), length);
616 } else {
617 return UNICODE::utf8_length(value->byte_at_addr(0), length);
618 }
619 }
620
621 int java_lang_String::utf8_length(oop java_string) {
622 typeArrayOop value = java_lang_String::value(java_string);
623 return utf8_length(java_string, value);
624 }
625
626 char* java_lang_String::as_utf8_string(oop java_string) {
627 typeArrayOop value = java_lang_String::value(java_string);
628 int length = java_lang_String::length(java_string, value);
629 bool is_latin1 = java_lang_String::is_latin1(java_string);
630 if (!is_latin1) {
631 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
632 return UNICODE::as_utf8(position, length);
633 } else {
634 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
635 return UNICODE::as_utf8(position, length);
636 }
637 }
638
639 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
640 assert(value_equals(value, java_lang_String::value(java_string)),
641 "value must be same as java_lang_String::value(java_string)");
642 int length = java_lang_String::length(java_string, value);
643 bool is_latin1 = java_lang_String::is_latin1(java_string);
644 if (!is_latin1) {
645 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
646 return UNICODE::as_utf8(position, length, buf, buflen);
647 } else {
648 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
649 return UNICODE::as_utf8(position, length, buf, buflen);
650 }
651 }
652
653 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
654 typeArrayOop value = java_lang_String::value(java_string);
655 return as_utf8_string(java_string, value, buf, buflen);
656 }
657
658 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
659 typeArrayOop value = java_lang_String::value(java_string);
660 bool is_latin1 = java_lang_String::is_latin1(java_string);
661 assert(start + len <= java_lang_String::length(java_string), "just checking");
662 if (!is_latin1) {
663 jchar* position = value->char_at_addr(start);
664 return UNICODE::as_utf8(position, len);
665 } else {
666 jbyte* position = value->byte_at_addr(start);
667 return UNICODE::as_utf8(position, len);
668 }
669 }
670
671 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
672 assert(value_equals(value, java_lang_String::value(java_string)),
673 "value must be same as java_lang_String::value(java_string)");
674 assert(start + len <= java_lang_String::length(java_string), "just checking");
675 bool is_latin1 = java_lang_String::is_latin1(java_string);
676 if (!is_latin1) {
677 jchar* position = value->char_at_addr(start);
678 return UNICODE::as_utf8(position, len, buf, buflen);
679 } else {
680 jbyte* position = value->byte_at_addr(start);
681 return UNICODE::as_utf8(position, len, buf, buflen);
682 }
683 }
684
685 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
686 assert(java_string->klass() == SystemDictionary::String_klass(),
687 "must be java_string");
688 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
689 int length = java_lang_String::length(java_string, value);
690 if (length != len) {
691 return false;
692 }
693 bool is_latin1 = java_lang_String::is_latin1(java_string);
694 if (!is_latin1) {
695 for (int i = 0; i < len; i++) {
696 if (value->char_at(i) != chars[i]) {
697 return false;
698 }
699 }
700 } else {
701 for (int i = 0; i < len; i++) {
702 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
703 return false;
704 }
705 }
706 }
707 return true;
708 }
709
710 bool java_lang_String::equals(oop str1, oop str2) {
711 assert(str1->klass() == SystemDictionary::String_klass(),
712 "must be java String");
713 assert(str2->klass() == SystemDictionary::String_klass(),
714 "must be java String");
715 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
716 bool is_latin1 = java_lang_String::is_latin1(str1);
717 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
718 bool is_latin2 = java_lang_String::is_latin1(str2);
719
720 if (is_latin1 != is_latin2) {
721 // Strings with different coders are never equal.
722 return false;
723 }
724 return value_equals(value1, value2);
725 }
726
727 void java_lang_String::print(oop java_string, outputStream* st) {
728 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
729 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
730
731 if (value == NULL) {
732 // This can happen if, e.g., printing a String
733 // object before its initializer has been called
734 st->print("NULL");
735 return;
736 }
737
738 int length = java_lang_String::length(java_string, value);
739 bool is_latin1 = java_lang_String::is_latin1(java_string);
740
741 st->print("\"");
742 for (int index = 0; index < length; index++) {
743 st->print("%c", (!is_latin1) ? value->char_at(index) :
744 ((jchar) value->byte_at(index)) & 0xff );
745 }
746 st->print("\"");
747 }
748
749
750 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
751 assert(mirror.not_null() && fd->is_static(), "just checking");
752 if (fd->has_initial_value()) {
753 BasicType t = fd->field_type();
754 switch (t) {
755 case T_BYTE:
756 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
757 break;
758 case T_BOOLEAN:
759 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
760 break;
761 case T_CHAR:
762 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
763 break;
764 case T_SHORT:
765 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
766 break;
767 case T_INT:
768 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
769 break;
770 case T_FLOAT:
771 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
772 break;
773 case T_DOUBLE:
774 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
775 break;
776 case T_LONG:
777 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
778 break;
779 case T_OBJECT:
780 {
781 assert(fd->signature() == vmSymbols::string_signature(),
782 "just checking");
783 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
784 // Archive the String field and update the pointer.
785 oop s = mirror()->obj_field(fd->offset());
786 oop archived_s = StringTable::create_archived_string(s, CHECK);
787 mirror()->obj_field_put(fd->offset(), archived_s);
788 } else {
789 oop string = fd->string_initial_value(CHECK);
790 mirror()->obj_field_put(fd->offset(), string);
791 }
792 }
793 break;
794 default:
795 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
796 "Illegal ConstantValue attribute in class file");
797 }
798 }
799 }
800
801
802 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
803 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
804
805 // If the offset was read from the shared archive, it was fixed up already
806 if (!k->is_shared()) {
807 if (k->is_instance_klass()) {
808 // During bootstrap, java.lang.Class wasn't loaded so static field
809 // offsets were computed without the size added it. Go back and
810 // update all the static field offsets to included the size.
811 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
812 if (fs.access_flags().is_static()) {
813 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
814 fs.set_offset(real_offset);
815 }
816 }
817 }
818 }
819
820 if (k->is_shared() && k->has_raw_archived_mirror()) {
821 if (HeapShared::open_archive_heap_region_mapped()) {
822 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
823 assert(present, "Missing archived mirror for %s", k->external_name());
824 return;
825 } else {
826 k->set_java_mirror_handle(NULL);
827 k->clear_has_raw_archived_mirror();
828 }
829 }
830 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
831 }
832
833 void java_lang_Class::initialize_mirror_fields(Klass* k,
834 Handle mirror,
835 Handle protection_domain,
836 TRAPS) {
837 // Allocate a simple java object for a lock.
838 // This needs to be a java object because during class initialization
839 // it can be held across a java call.
840 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
841 set_init_lock(mirror(), r);
842
843 // Set protection domain also
844 set_protection_domain(mirror(), protection_domain());
845
846 // Initialize static fields
847 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
848 }
849
850 // Set the java.lang.Module module field in the java_lang_Class mirror
851 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
852 if (module.is_null()) {
853 // During startup, the module may be NULL only if java.base has not been defined yet.
854 // Put the class on the fixup_module_list to patch later when the java.lang.Module
855 // for java.base is known. But note that since we captured the NULL module another
856 // thread may have completed that initialization.
857
858 bool javabase_was_defined = false;
859 {
860 MutexLocker m1(Module_lock, THREAD);
861 // Keep list of classes needing java.base module fixup
862 if (!ModuleEntryTable::javabase_defined()) {
863 assert(k->java_mirror() != NULL, "Class's mirror is null");
864 k->class_loader_data()->inc_keep_alive();
865 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
866 fixup_module_field_list()->push(k);
867 } else {
868 javabase_was_defined = true;
869 }
870 }
871
872 // If java.base was already defined then patch this particular class with java.base.
873 if (javabase_was_defined) {
874 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
875 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
876 "Setting class module field, " JAVA_BASE_NAME " should be defined");
877 Handle javabase_handle(THREAD, javabase_entry->module());
878 set_module(mirror(), javabase_handle());
879 }
880 } else {
881 assert(Universe::is_module_initialized() ||
882 (ModuleEntryTable::javabase_defined() &&
883 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
884 "Incorrect java.lang.Module specification while creating mirror");
885 set_module(mirror(), module());
886 }
887 }
888
889 // Statically allocate fixup lists because they always get created.
890 void java_lang_Class::allocate_fixup_lists() {
891 GrowableArray<Klass*>* mirror_list =
892 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
893 set_fixup_mirror_list(mirror_list);
894
895 GrowableArray<Klass*>* module_list =
896 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
897 set_fixup_module_field_list(module_list);
898 }
899
900 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
901 Handle module, Handle protection_domain, TRAPS) {
902 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
903 assert(k->java_mirror() == NULL, "should only assign mirror once");
904
905 // Use this moment of initialization to cache modifier_flags also,
906 // to support Class.getModifiers(). Instance classes recalculate
907 // the cached flags after the class file is parsed, but before the
908 // class is put into the system dictionary.
909 int computed_modifiers = k->compute_modifier_flags(CHECK);
910 k->set_modifier_flags(computed_modifiers);
911 // Class_klass has to be loaded because it is used to allocate
912 // the mirror.
913 if (SystemDictionary::Class_klass_loaded()) {
914 // Allocate mirror (java.lang.Class instance)
915 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
916 Handle mirror(THREAD, mirror_oop);
917 Handle comp_mirror;
918
919 // Setup indirection from mirror->klass
920 java_lang_Class::set_klass(mirror(), k);
921
922 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
923 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
924
925 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
926
927 // It might also have a component mirror. This mirror must already exist.
928 if (k->is_array_klass()) {
929 if (k->is_valueArray_klass()) {
930 Klass* element_klass = (Klass*) ValueArrayKlass::cast(k)->element_klass();
931 assert(element_klass->is_value(), "Must be value type component");
932 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(element_klass));
933 comp_mirror = Handle(THREAD, vk->value_mirror());
934 } else if (k->is_typeArray_klass()) {
935 BasicType type = TypeArrayKlass::cast(k)->element_type();
936 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
937 } else {
938 assert(k->is_objArray_klass(), "Must be");
939 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
940 assert(element_klass != NULL, "Must have an element klass");
941 if (element_klass->is_value()) {
942 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(element_klass));
943 assert(vk->java_mirror() == vk->value_mirror(), "primary mirror is the value mirror");
944 assert(vk->indirect_mirror() != NULL, "must have an indirect class mirror");
945 comp_mirror = k->name()->is_Q_array_signature() ? Handle(THREAD, vk->value_mirror())
946 : Handle(THREAD, vk->indirect_mirror());
947 } else {
948 comp_mirror = Handle(THREAD, element_klass->java_mirror());
949 }
950 }
951 assert(comp_mirror() != NULL, "must have a mirror");
952
953 // Two-way link between the array klass and its component mirror:
954 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
955 set_component_mirror(mirror(), comp_mirror());
956 // See below for ordering dependencies between field array_klass in component mirror
957 // and java_mirror in this klass.
958 } else {
959 assert(k->is_instance_klass(), "Must be");
960
961 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
962 if (HAS_PENDING_EXCEPTION) {
963 // If any of the fields throws an exception like OOM remove the klass field
964 // from the mirror so GC doesn't follow it after the klass has been deallocated.
965 // This mirror looks like a primitive type, which logically it is because it
966 // it represents no class.
967 java_lang_Class::set_klass(mirror(), NULL);
968 return;
969 }
970 }
971
972 // set the classLoader field in the java_lang_Class instance
973 assert(class_loader() == k->class_loader(), "should be same");
974 set_class_loader(mirror(), class_loader());
975
976 // Setup indirection from klass->mirror
977 // after any exceptions can happen during allocations.
978 k->set_java_mirror(mirror);
979
980 // Set the module field in the java_lang_Class instance. This must be done
981 // after the mirror is set.
982 set_mirror_module_field(k, mirror, module, THREAD);
983
984 if (comp_mirror() != NULL) {
985 // Set after k->java_mirror() is published, because compiled code running
986 // concurrently doesn't expect a k to have a null java_mirror.
987 release_set_array_klass(comp_mirror(), k);
988 }
989
990 if (k->is_value()) {
991 // create the secondary mirror for an inline class
992 oop indirect_mirror_oop = create_indirect_type_mirror(k, mirror, CHECK);
993 set_inline_type_mirror(mirror(), mirror());
994 set_indirect_type_mirror(mirror(), indirect_mirror_oop);
995 }
996 } else {
997 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
998 fixup_mirror_list()->push(k);
999 }
1000 }
1001
1002 // Create the secondary mirror for inline class. Sets all the fields of this java.lang.Class
1003 // instance with the same value as the primary mirror
1004 oop java_lang_Class::create_indirect_type_mirror(Klass* k, Handle mirror, TRAPS) {
1005 assert(k->is_value(), "inline class");
1006 // Allocate mirror (java.lang.Class instance)
1007 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0);
1008 Handle indirect_mirror(THREAD, mirror_oop);
1009
1010 java_lang_Class::set_klass(indirect_mirror(), k);
1011 java_lang_Class::set_static_oop_field_count(indirect_mirror(), static_oop_field_count(mirror()));
1012 // ## do we need to set init lock?
1013 java_lang_Class::set_init_lock(indirect_mirror(), init_lock(mirror()));
1014
1015 set_protection_domain(indirect_mirror(), protection_domain(mirror()));
1016 set_class_loader(indirect_mirror(), class_loader(mirror()));
1017 // ## handle if java.base is not yet defined
1018 set_module(indirect_mirror(), module(mirror()));
1019 set_inline_type_mirror(indirect_mirror(), mirror());
1020 set_indirect_type_mirror(indirect_mirror(), indirect_mirror());
1021 return indirect_mirror();
1022 }
1023
1024 #if INCLUDE_CDS_JAVA_HEAP
1025 // Clears mirror fields. Static final fields with initial values are reloaded
1026 // from constant pool. The object identity hash is in the object header and is
1027 // not affected.
1028 class ResetMirrorField: public FieldClosure {
1029 private:
1030 Handle _m;
1031
1032 public:
1033 ResetMirrorField(Handle mirror) : _m(mirror) {}
1034
1035 void do_field(fieldDescriptor* fd) {
1036 assert(DumpSharedSpaces, "dump time only");
1037 assert(_m.not_null(), "Mirror cannot be NULL");
1038
1039 if (fd->is_static() && fd->has_initial_value()) {
1040 initialize_static_field(fd, _m, Thread::current());
1041 return;
1042 }
1043
1044 BasicType ft = fd->field_type();
1045 switch (ft) {
1046 case T_BYTE:
1047 _m()->byte_field_put(fd->offset(), 0);
1048 break;
1049 case T_CHAR:
1050 _m()->char_field_put(fd->offset(), 0);
1051 break;
1052 case T_DOUBLE:
1053 _m()->double_field_put(fd->offset(), 0);
1054 break;
1055 case T_FLOAT:
1056 _m()->float_field_put(fd->offset(), 0);
1057 break;
1058 case T_INT:
1059 _m()->int_field_put(fd->offset(), 0);
1060 break;
1061 case T_LONG:
1062 _m()->long_field_put(fd->offset(), 0);
1063 break;
1064 case T_SHORT:
1065 _m()->short_field_put(fd->offset(), 0);
1066 break;
1067 case T_BOOLEAN:
1068 _m()->bool_field_put(fd->offset(), false);
1069 break;
1070 case T_ARRAY:
1071 case T_OBJECT: {
1072 // It might be useful to cache the String field, but
1073 // for now just clear out any reference field
1074 oop o = _m()->obj_field(fd->offset());
1075 _m()->obj_field_put(fd->offset(), NULL);
1076 break;
1077 }
1078 default:
1079 ShouldNotReachHere();
1080 break;
1081 }
1082 }
1083 };
1084
1085 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1086 assert(HeapShared::is_heap_object_archiving_allowed(),
1087 "HeapShared::is_heap_object_archiving_allowed() must be true");
1088
1089 for (int t = 0; t <= T_VOID; t++) {
1090 oop m = Universe::_mirrors[t];
1091 if (m != NULL) {
1092 // Update the field at _array_klass_offset to point to the relocated array klass.
1093 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1094 assert(archived_m != NULL, "sanity");
1095 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1096 assert(ak != NULL || t == T_VOID, "should not be NULL");
1097 if (ak != NULL) {
1098 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1099 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1100 }
1101
1102 // Clear the fields. Just to be safe
1103 Klass *k = m->klass();
1104 Handle archived_mirror_h(THREAD, archived_m);
1105 ResetMirrorField reset(archived_mirror_h);
1106 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1107
1108 log_trace(cds, heap, mirror)(
1109 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1110 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1111
1112 Universe::_mirrors[t] = archived_m;
1113 }
1114 }
1115
1116 assert(Universe::_mirrors[T_INT] != NULL &&
1117 Universe::_mirrors[T_FLOAT] != NULL &&
1118 Universe::_mirrors[T_DOUBLE] != NULL &&
1119 Universe::_mirrors[T_BYTE] != NULL &&
1120 Universe::_mirrors[T_BOOLEAN] != NULL &&
1121 Universe::_mirrors[T_CHAR] != NULL &&
1122 Universe::_mirrors[T_LONG] != NULL &&
1123 Universe::_mirrors[T_SHORT] != NULL &&
1124 Universe::_mirrors[T_VOID] != NULL, "sanity");
1125
1126 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1127 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1128 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1129 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1130 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1131 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1132 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1133 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1134 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1135 }
1136
1137 //
1138 // After the mirror object is successfully archived, the archived
1139 // klass is set with _has_archived_raw_mirror flag.
1140 //
1141 // The _has_archived_raw_mirror flag is cleared at runtime when the
1142 // archived mirror is restored. If archived java heap data cannot
1143 // be used at runtime, new mirror object is created for the shared
1144 // class. The _has_archived_raw_mirror is cleared also during the process.
1145 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1146 assert(HeapShared::is_heap_object_archiving_allowed(),
1147 "HeapShared::is_heap_object_archiving_allowed() must be true");
1148
1149 // Mirror is already archived
1150 if (k->has_raw_archived_mirror()) {
1151 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1152 return k->archived_java_mirror_raw();
1153 }
1154
1155 // No mirror
1156 oop mirror = k->java_mirror();
1157 if (mirror == NULL) {
1158 return NULL;
1159 }
1160
1161 if (k->is_instance_klass()) {
1162 InstanceKlass *ik = InstanceKlass::cast(k);
1163 assert(ik->signers() == NULL, "class with signer should have been excluded");
1164
1165 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1166 ik->is_shared_app_class())) {
1167 // Archiving mirror for classes from non-builtin loaders is not
1168 // supported. Clear the _java_mirror within the archived class.
1169 k->set_java_mirror_handle(NULL);
1170 return NULL;
1171 }
1172 }
1173
1174 // Now start archiving the mirror object
1175 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1176 if (archived_mirror == NULL) {
1177 return NULL;
1178 }
1179
1180 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1181 if (archived_mirror == NULL) {
1182 return NULL;
1183 }
1184
1185 k->set_archived_java_mirror_raw(archived_mirror);
1186
1187 k->set_has_raw_archived_mirror();
1188
1189 ResourceMark rm;
1190 log_trace(cds, heap, mirror)(
1191 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1192 k->external_name(), p2i(mirror), p2i(archived_mirror));
1193
1194 return archived_mirror;
1195 }
1196
1197 // The process is based on create_mirror().
1198 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1199 oop archived_mirror,
1200 Thread *THREAD) {
1201 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1202 // to archived metadata and objects below.
1203 Klass *c = archived_mirror->klass();
1204 Handle archived_mirror_h(THREAD, archived_mirror);
1205 ResetMirrorField reset(archived_mirror_h);
1206 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1207
1208 if (k->is_array_klass()) {
1209 oop archived_comp_mirror;
1210 if (k->is_typeArray_klass()) {
1211 // The primitive type mirrors are already archived. Get the archived mirror.
1212 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1213 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1214 assert(archived_comp_mirror != NULL, "Must be");
1215 } else {
1216 assert(k->is_objArray_klass(), "Must be");
1217 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1218 assert(element_klass != NULL, "Must have an element klass");
1219 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1220 if (archived_comp_mirror == NULL) {
1221 return NULL;
1222 }
1223 }
1224 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1225 } else {
1226 assert(k->is_instance_klass(), "Must be");
1227
1228 // Reset local static fields in the mirror
1229 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1230
1231 java_lang_Class:set_init_lock(archived_mirror, NULL);
1232
1233 set_protection_domain(archived_mirror, NULL);
1234 }
1235
1236 // clear class loader and mirror_module_field
1237 set_class_loader(archived_mirror, NULL);
1238 set_module(archived_mirror, NULL);
1239
1240 // The archived mirror's field at _klass_offset is still pointing to the original
1241 // klass. Updated the field in the archived mirror to point to the relocated
1242 // klass in the archive.
1243 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1244 log_debug(cds, heap, mirror)(
1245 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1246 p2i(as_Klass(mirror)), p2i(reloc_k));
1247 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1248
1249 // The field at _array_klass_offset is pointing to the original one dimension
1250 // higher array klass if exists. Relocate the pointer.
1251 Klass *arr = array_klass_acquire(mirror);
1252 if (arr != NULL) {
1253 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1254 log_debug(cds, heap, mirror)(
1255 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1256 p2i(arr), p2i(reloc_arr));
1257 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1258 }
1259 return archived_mirror;
1260 }
1261
1262 // Returns true if the mirror is updated, false if no archived mirror
1263 // data is present. After the archived mirror object is restored, the
1264 // shared klass' _has_raw_archived_mirror flag is cleared.
1265 bool java_lang_Class::restore_archived_mirror(Klass *k,
1266 Handle class_loader, Handle module,
1267 Handle protection_domain, TRAPS) {
1268 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1269 // see more details in SystemDictionary::resolve_well_known_classes().
1270 if (!SystemDictionary::Class_klass_loaded()) {
1271 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1272 fixup_mirror_list()->push(k);
1273 return true;
1274 }
1275
1276 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1277
1278 if (m == NULL) {
1279 return false;
1280 }
1281
1282 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1283
1284 // mirror is archived, restore
1285 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1286 Handle mirror(THREAD, m);
1287
1288 if (!k->is_array_klass()) {
1289 // - local static final fields with initial values were initialized at dump time
1290
1291 // create the init_lock
1292 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1293 set_init_lock(mirror(), r);
1294
1295 if (protection_domain.not_null()) {
1296 set_protection_domain(mirror(), protection_domain());
1297 }
1298 }
1299
1300 assert(class_loader() == k->class_loader(), "should be same");
1301 if (class_loader.not_null()) {
1302 set_class_loader(mirror(), class_loader());
1303 }
1304
1305 k->set_java_mirror(mirror);
1306 k->clear_has_raw_archived_mirror();
1307
1308 set_mirror_module_field(k, mirror, module, THREAD);
1309
1310 ResourceMark rm;
1311 log_trace(cds, heap, mirror)(
1312 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1313
1314 return true;
1315 }
1316 #endif // INCLUDE_CDS_JAVA_HEAP
1317
1318 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1319 assert(_module_offset != 0, "must have been computed already");
1320 java_lang_Class::set_module(k->java_mirror(), module());
1321 }
1322
1323 int java_lang_Class::oop_size(oop java_class) {
1324 assert(_oop_size_offset != 0, "must be set");
1325 int size = java_class->int_field(_oop_size_offset);
1326 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1327 return size;
1328 }
1329
1330
1331 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1332 assert(_oop_size_offset != 0, "must be set");
1333 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1334 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1335 }
1336
1337 int java_lang_Class::static_oop_field_count(oop java_class) {
1338 assert(_static_oop_field_count_offset != 0, "must be set");
1339 return java_class->int_field(_static_oop_field_count_offset);
1340 }
1341
1342 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1343 assert(_static_oop_field_count_offset != 0, "must be set");
1344 return java_class->int_field_raw(_static_oop_field_count_offset);
1345 }
1346
1347 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1348 assert(_static_oop_field_count_offset != 0, "must be set");
1349 java_class->int_field_put(_static_oop_field_count_offset, size);
1350 }
1351
1352 oop java_lang_Class::protection_domain(oop java_class) {
1353 assert(_protection_domain_offset != 0, "must be set");
1354 return java_class->obj_field(_protection_domain_offset);
1355 }
1356 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1357 assert(_protection_domain_offset != 0, "must be set");
1358 java_class->obj_field_put(_protection_domain_offset, pd);
1359 }
1360
1361 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1362 assert(_component_mirror_offset != 0, "must be set");
1363 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1364 }
1365 oop java_lang_Class::component_mirror(oop java_class) {
1366 assert(_component_mirror_offset != 0, "must be set");
1367 return java_class->obj_field(_component_mirror_offset);
1368 }
1369
1370 oop java_lang_Class::init_lock(oop java_class) {
1371 assert(_init_lock_offset != 0, "must be set");
1372 return java_class->obj_field(_init_lock_offset);
1373 }
1374 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1375 assert(_init_lock_offset != 0, "must be set");
1376 java_class->obj_field_put(_init_lock_offset, init_lock);
1377 }
1378
1379 objArrayOop java_lang_Class::signers(oop java_class) {
1380 assert(_signers_offset != 0, "must be set");
1381 return (objArrayOop)java_class->obj_field(_signers_offset);
1382 }
1383 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1384 assert(_signers_offset != 0, "must be set");
1385 java_class->obj_field_put(_signers_offset, (oop)signers);
1386 }
1387
1388
1389 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1390 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1391 if (_class_loader_offset != 0) {
1392 java_class->obj_field_put(_class_loader_offset, loader);
1393 }
1394 }
1395
1396 oop java_lang_Class::class_loader(oop java_class) {
1397 assert(_class_loader_offset != 0, "must be set");
1398 return java_class->obj_field(_class_loader_offset);
1399 }
1400
1401 oop java_lang_Class::module(oop java_class) {
1402 assert(_module_offset != 0, "must be set");
1403 return java_class->obj_field(_module_offset);
1404 }
1405
1406 void java_lang_Class::set_module(oop java_class, oop module) {
1407 assert(_module_offset != 0, "must be set");
1408 java_class->obj_field_put(_module_offset, module);
1409 }
1410
1411 oop java_lang_Class::name(Handle java_class, TRAPS) {
1412 assert(_name_offset != 0, "must be set");
1413 oop o = java_class->obj_field(_name_offset);
1414 if (o == NULL) {
1415 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1416 java_class->obj_field_put(_name_offset, o);
1417 }
1418 return o;
1419 }
1420
1421 oop java_lang_Class::source_file(oop java_class) {
1422 assert(_source_file_offset != 0, "must be set");
1423 return java_class->obj_field(_source_file_offset);
1424 }
1425
1426 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1427 assert(_source_file_offset != 0, "must be set");
1428 java_class->obj_field_put(_source_file_offset, source_file);
1429 }
1430
1431 oop java_lang_Class::inline_type_mirror(oop java_class) {
1432 assert(_inline_mirror_offset != 0, "must be set");
1433 return java_class->obj_field(_inline_mirror_offset);
1434 }
1435
1436 void java_lang_Class::set_inline_type_mirror(oop java_class, oop mirror) {
1437 assert(_inline_mirror_offset != 0, "must be set");
1438 java_class->obj_field_put(_inline_mirror_offset, mirror);
1439 }
1440
1441 oop java_lang_Class::indirect_type_mirror(oop java_class) {
1442 assert(_indirect_mirror_offset != 0, "must be set");
1443 return java_class->obj_field(_indirect_mirror_offset);
1444 }
1445
1446 void java_lang_Class::set_indirect_type_mirror(oop java_class, oop mirror) {
1447 assert(_indirect_mirror_offset != 0, "must be set");
1448 java_class->obj_field_put(_indirect_mirror_offset, mirror);
1449 }
1450
1451 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1452 // This should be improved by adding a field at the Java level or by
1453 // introducing a new VM klass (see comment in ClassFileParser)
1454 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1455 if (type != T_VOID) {
1456 Klass* aklass = Universe::typeArrayKlassObj(type);
1457 assert(aklass != NULL, "correct bootstrap");
1458 release_set_array_klass(java_class, aklass);
1459 }
1460 #ifdef ASSERT
1461 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1462 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1463 #endif
1464 return java_class;
1465 }
1466
1467
1468 Klass* java_lang_Class::as_Klass(oop java_class) {
1469 //%note memory_2
1470 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1471 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1472 assert(k == NULL || k->is_klass(), "type check");
1473 return k;
1474 }
1475
1476 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1477 //%note memory_2
1478 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1479 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1480 assert(k == NULL || k->is_klass(), "type check");
1481 return k;
1482 }
1483
1484
1485 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1486 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1487 java_class->metadata_field_put(_klass_offset, klass);
1488 }
1489
1490
1491 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1492 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1493 Symbol* name = NULL;
1494 bool is_instance = false;
1495 bool is_value = false;
1496 if (is_primitive(java_class)) {
1497 name = vmSymbols::type_signature(primitive_type(java_class));
1498 } else {
1499 Klass* k = as_Klass(java_class);
1500 is_instance = k->is_instance_klass();
1501 is_value = k->is_value();
1502 name = k->name();
1503 }
1504 if (name == NULL) {
1505 st->print("<null>");
1506 return;
1507 }
1508 if (is_instance) {
1509 if (is_value && (java_class == inline_type_mirror(java_class))) {
1510 st->print("Q");
1511 } else {
1512 st->print("L");
1513 }
1514 }
1515 st->write((char*) name->base(), (int) name->utf8_length());
1516 if (is_instance) st->print(";");
1517 }
1518
1519 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1520 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1521 Symbol* name;
1522 if (is_primitive(java_class)) {
1523 name = vmSymbols::type_signature(primitive_type(java_class));
1524 // Because this can create a new symbol, the caller has to decrement
1525 // the refcount, so make adjustment here and below for symbols returned
1526 // that are not created or incremented due to a successful lookup.
1527 name->increment_refcount();
1528 } else {
1529 Klass* k = as_Klass(java_class);
1530 if (!k->is_instance_klass()) {
1531 name = k->name();
1532 name->increment_refcount();
1533 } else {
1534 ResourceMark rm;
1535 const char* sigstr;
1536 if (k->is_value()) {
1537 char c = (java_class == inline_type_mirror(java_class)) ? 'Q' : 'L';
1538 sigstr = InstanceKlass::cast(k)->signature_name_of(c);
1539 } else {
1540 sigstr = k->signature_name();
1541 }
1542 int siglen = (int) strlen(sigstr);
1543 if (!intern_if_not_found) {
1544 name = SymbolTable::probe(sigstr, siglen);
1545 } else {
1546 name = SymbolTable::new_symbol(sigstr, siglen);
1547 }
1548 }
1549 }
1550 return name;
1551 }
1552
1553 // Returns the Java name for this Java mirror (Resource allocated)
1554 // See Klass::external_name().
1555 // For primitive type Java mirrors, its type name is returned.
1556 const char* java_lang_Class::as_external_name(oop java_class) {
1557 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1558 const char* name = NULL;
1559 if (is_primitive(java_class)) {
1560 name = type2name(primitive_type(java_class));
1561 } else {
1562 name = as_Klass(java_class)->external_name();
1563 }
1564 if (name == NULL) {
1565 name = "<null>";
1566 }
1567 return name;
1568 }
1569
1570 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1571 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1572 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1573 return k;
1574 }
1575
1576
1577 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1578 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1579 java_class->release_metadata_field_put(_array_klass_offset, klass);
1580 }
1581
1582
1583 BasicType java_lang_Class::primitive_type(oop java_class) {
1584 assert(java_lang_Class::is_primitive(java_class), "just checking");
1585 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1586 BasicType type = T_VOID;
1587 if (ak != NULL) {
1588 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1589 type = ArrayKlass::cast(ak)->element_type();
1590 } else {
1591 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1592 }
1593 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1594 return type;
1595 }
1596
1597 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1598 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1599 if (is_primitive(java_class)) {
1600 if (reference_klass != NULL)
1601 (*reference_klass) = NULL;
1602 return primitive_type(java_class);
1603 } else {
1604 if (reference_klass != NULL)
1605 (*reference_klass) = as_Klass(java_class);
1606 return T_OBJECT;
1607 }
1608 }
1609
1610
1611 oop java_lang_Class::primitive_mirror(BasicType t) {
1612 oop mirror = Universe::java_mirror(t);
1613 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1614 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1615 return mirror;
1616 }
1617
1618 bool java_lang_Class::offsets_computed = false;
1619 int java_lang_Class::classRedefinedCount_offset = -1;
1620
1621 #define CLASS_FIELDS_DO(macro) \
1622 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1623 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1624 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1625 macro(_module_offset, k, "module", module_signature, false); \
1626 macro(_name_offset, k, "name", string_signature, false); \
1627 macro(_inline_mirror_offset, k, "inlineType", class_signature, false); \
1628 macro(_indirect_mirror_offset, k, "indirectType", class_signature, false); \
1629
1630 void java_lang_Class::compute_offsets() {
1631 if (offsets_computed) {
1632 return;
1633 }
1634
1635 offsets_computed = true;
1636
1637 InstanceKlass* k = SystemDictionary::Class_klass();
1638 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1639
1640 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1641 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1642 // GC treats them the same.
1643 _init_lock_offset = _component_mirror_offset;
1644
1645 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1646 }
1647
1648 #if INCLUDE_CDS
1649 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1650 f->do_bool(&offsets_computed);
1651 f->do_u4((u4*)&_init_lock_offset);
1652
1653 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1654
1655 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1656 }
1657 #endif
1658
1659 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1660 if (classRedefinedCount_offset == -1) {
1661 // If we don't have an offset for it then just return -1 as a marker.
1662 return -1;
1663 }
1664
1665 return the_class_mirror->int_field(classRedefinedCount_offset);
1666 }
1667
1668 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1669 if (classRedefinedCount_offset == -1) {
1670 // If we don't have an offset for it then nothing to set.
1671 return;
1672 }
1673
1674 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1675 }
1676
1677
1678 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1679 // platform thread structure, and a eetop offset which was used for thread
1680 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1681 // merged, so in the HotSpot VM we just use the eetop field for the thread
1682 // instead of the privateInfo_offset.
1683 //
1684 // Note: The stackSize field is only present starting in 1.4.
1685
1686 int java_lang_Thread::_name_offset = 0;
1687 int java_lang_Thread::_group_offset = 0;
1688 int java_lang_Thread::_contextClassLoader_offset = 0;
1689 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1690 int java_lang_Thread::_priority_offset = 0;
1691 int java_lang_Thread::_eetop_offset = 0;
1692 int java_lang_Thread::_daemon_offset = 0;
1693 int java_lang_Thread::_stillborn_offset = 0;
1694 int java_lang_Thread::_stackSize_offset = 0;
1695 int java_lang_Thread::_tid_offset = 0;
1696 int java_lang_Thread::_thread_status_offset = 0;
1697 int java_lang_Thread::_park_blocker_offset = 0;
1698
1699 #define THREAD_FIELDS_DO(macro) \
1700 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1701 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1702 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1703 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1704 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1705 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1706 macro(_eetop_offset, k, "eetop", long_signature, false); \
1707 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1708 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1709 macro(_tid_offset, k, "tid", long_signature, false); \
1710 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1711 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false)
1712
1713 void java_lang_Thread::compute_offsets() {
1714 assert(_group_offset == 0, "offsets should be initialized only once");
1715
1716 InstanceKlass* k = SystemDictionary::Thread_klass();
1717 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1718 }
1719
1720 #if INCLUDE_CDS
1721 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1722 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1723 }
1724 #endif
1725
1726 JavaThread* java_lang_Thread::thread(oop java_thread) {
1727 return (JavaThread*)java_thread->address_field(_eetop_offset);
1728 }
1729
1730
1731 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1732 java_thread->address_field_put(_eetop_offset, (address)thread);
1733 }
1734
1735
1736 oop java_lang_Thread::name(oop java_thread) {
1737 return java_thread->obj_field(_name_offset);
1738 }
1739
1740
1741 void java_lang_Thread::set_name(oop java_thread, oop name) {
1742 java_thread->obj_field_put(_name_offset, name);
1743 }
1744
1745
1746 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1747 return (ThreadPriority)java_thread->int_field(_priority_offset);
1748 }
1749
1750
1751 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1752 java_thread->int_field_put(_priority_offset, priority);
1753 }
1754
1755
1756 oop java_lang_Thread::threadGroup(oop java_thread) {
1757 return java_thread->obj_field(_group_offset);
1758 }
1759
1760
1761 bool java_lang_Thread::is_stillborn(oop java_thread) {
1762 return java_thread->bool_field(_stillborn_offset) != 0;
1763 }
1764
1765
1766 // We never have reason to turn the stillborn bit off
1767 void java_lang_Thread::set_stillborn(oop java_thread) {
1768 java_thread->bool_field_put(_stillborn_offset, true);
1769 }
1770
1771
1772 bool java_lang_Thread::is_alive(oop java_thread) {
1773 JavaThread* thr = java_lang_Thread::thread(java_thread);
1774 return (thr != NULL);
1775 }
1776
1777
1778 bool java_lang_Thread::is_daemon(oop java_thread) {
1779 return java_thread->bool_field(_daemon_offset) != 0;
1780 }
1781
1782
1783 void java_lang_Thread::set_daemon(oop java_thread) {
1784 java_thread->bool_field_put(_daemon_offset, true);
1785 }
1786
1787 oop java_lang_Thread::context_class_loader(oop java_thread) {
1788 return java_thread->obj_field(_contextClassLoader_offset);
1789 }
1790
1791 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1792 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1793 }
1794
1795
1796 jlong java_lang_Thread::stackSize(oop java_thread) {
1797 return java_thread->long_field(_stackSize_offset);
1798 }
1799
1800 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1801 void java_lang_Thread::set_thread_status(oop java_thread,
1802 java_lang_Thread::ThreadStatus status) {
1803 java_thread->int_field_put(_thread_status_offset, status);
1804 }
1805
1806 // Read thread status value from threadStatus field in java.lang.Thread java class.
1807 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1808 // Make sure the caller is operating on behalf of the VM or is
1809 // running VM code (state == _thread_in_vm).
1810 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1811 JavaThread::current()->thread_state() == _thread_in_vm,
1812 "Java Thread is not running in vm");
1813 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1814 }
1815
1816
1817 jlong java_lang_Thread::thread_id(oop java_thread) {
1818 return java_thread->long_field(_tid_offset);
1819 }
1820
1821 oop java_lang_Thread::park_blocker(oop java_thread) {
1822 return java_thread->obj_field(_park_blocker_offset);
1823 }
1824
1825 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1826 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1827 switch (status) {
1828 case NEW : return "NEW";
1829 case RUNNABLE : return "RUNNABLE";
1830 case SLEEPING : return "TIMED_WAITING (sleeping)";
1831 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1832 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1833 case PARKED : return "WAITING (parking)";
1834 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1835 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1836 case TERMINATED : return "TERMINATED";
1837 default : return "UNKNOWN";
1838 };
1839 }
1840 int java_lang_ThreadGroup::_parent_offset = 0;
1841 int java_lang_ThreadGroup::_name_offset = 0;
1842 int java_lang_ThreadGroup::_threads_offset = 0;
1843 int java_lang_ThreadGroup::_groups_offset = 0;
1844 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1845 int java_lang_ThreadGroup::_destroyed_offset = 0;
1846 int java_lang_ThreadGroup::_daemon_offset = 0;
1847 int java_lang_ThreadGroup::_nthreads_offset = 0;
1848 int java_lang_ThreadGroup::_ngroups_offset = 0;
1849
1850 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1851 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1852 return java_thread_group->obj_field(_parent_offset);
1853 }
1854
1855 // ("name as oop" accessor is not necessary)
1856
1857 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1858 oop name = java_thread_group->obj_field(_name_offset);
1859 // ThreadGroup.name can be null
1860 if (name != NULL) {
1861 return java_lang_String::as_utf8_string(name);
1862 }
1863 return NULL;
1864 }
1865
1866 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1867 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1868 return java_thread_group->int_field(_nthreads_offset);
1869 }
1870
1871 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1872 oop threads = java_thread_group->obj_field(_threads_offset);
1873 assert(threads != NULL, "threadgroups should have threads");
1874 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1875 return objArrayOop(threads);
1876 }
1877
1878 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1879 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1880 return java_thread_group->int_field(_ngroups_offset);
1881 }
1882
1883 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1884 oop groups = java_thread_group->obj_field(_groups_offset);
1885 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1886 return objArrayOop(groups);
1887 }
1888
1889 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1890 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1891 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1892 }
1893
1894 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1895 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1896 return java_thread_group->bool_field(_destroyed_offset) != 0;
1897 }
1898
1899 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1900 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1901 return java_thread_group->bool_field(_daemon_offset) != 0;
1902 }
1903
1904 #define THREADGROUP_FIELDS_DO(macro) \
1905 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1906 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1907 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1908 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1909 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1910 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1911 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1912 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1913 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1914
1915 void java_lang_ThreadGroup::compute_offsets() {
1916 assert(_parent_offset == 0, "offsets should be initialized only once");
1917
1918 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1919 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1920 }
1921
1922 #if INCLUDE_CDS
1923 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1924 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1925 }
1926 #endif
1927
1928 #define THROWABLE_FIELDS_DO(macro) \
1929 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1930 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1931 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1932 macro(depth_offset, k, "depth", int_signature, false); \
1933 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1934
1935 void java_lang_Throwable::compute_offsets() {
1936 InstanceKlass* k = SystemDictionary::Throwable_klass();
1937 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1938 }
1939
1940 #if INCLUDE_CDS
1941 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1942 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1943 }
1944 #endif
1945
1946 oop java_lang_Throwable::unassigned_stacktrace() {
1947 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1948 oop base = ik->static_field_base_raw();
1949 return base->obj_field(static_unassigned_stacktrace_offset);
1950 }
1951
1952 oop java_lang_Throwable::backtrace(oop throwable) {
1953 return throwable->obj_field_acquire(backtrace_offset);
1954 }
1955
1956
1957 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1958 throwable->release_obj_field_put(backtrace_offset, value);
1959 }
1960
1961 int java_lang_Throwable::depth(oop throwable) {
1962 return throwable->int_field(depth_offset);
1963 }
1964
1965 void java_lang_Throwable::set_depth(oop throwable, int value) {
1966 throwable->int_field_put(depth_offset, value);
1967 }
1968
1969 oop java_lang_Throwable::message(oop throwable) {
1970 return throwable->obj_field(detailMessage_offset);
1971 }
1972
1973
1974 // Return Symbol for detailed_message or NULL
1975 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1976 PRESERVE_EXCEPTION_MARK; // Keep original exception
1977 oop detailed_message = java_lang_Throwable::message(throwable);
1978 if (detailed_message != NULL) {
1979 return java_lang_String::as_symbol(detailed_message);
1980 }
1981 return NULL;
1982 }
1983
1984 void java_lang_Throwable::set_message(oop throwable, oop value) {
1985 throwable->obj_field_put(detailMessage_offset, value);
1986 }
1987
1988
1989 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1990 throwable->obj_field_put(stackTrace_offset, st_element_array);
1991 }
1992
1993 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1994 set_stacktrace(throwable, NULL);
1995 }
1996
1997
1998 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1999 ResourceMark rm;
2000 Klass* k = throwable->klass();
2001 assert(k != NULL, "just checking");
2002 st->print("%s", k->external_name());
2003 oop msg = message(throwable);
2004 if (msg != NULL) {
2005 st->print(": %s", java_lang_String::as_utf8_string(msg));
2006 }
2007 }
2008
2009 // After this many redefines, the stack trace is unreliable.
2010 const int MAX_VERSION = USHRT_MAX;
2011
2012 static inline bool version_matches(Method* method, int version) {
2013 assert(version < MAX_VERSION, "version is too big");
2014 return method != NULL && (method->constants()->version() == version);
2015 }
2016
2017
2018 // This class provides a simple wrapper over the internal structure of
2019 // exception backtrace to insulate users of the backtrace from needing
2020 // to know what it looks like.
2021 class BacktraceBuilder: public StackObj {
2022 friend class BacktraceIterator;
2023 private:
2024 Handle _backtrace;
2025 objArrayOop _head;
2026 typeArrayOop _methods;
2027 typeArrayOop _bcis;
2028 objArrayOop _mirrors;
2029 typeArrayOop _names; // needed to insulate method name against redefinition
2030 int _index;
2031 NoSafepointVerifier _nsv;
2032
2033 enum {
2034 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2035 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2036 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2037 trace_names_offset = java_lang_Throwable::trace_names_offset,
2038 trace_next_offset = java_lang_Throwable::trace_next_offset,
2039 trace_size = java_lang_Throwable::trace_size,
2040 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2041 };
2042
2043 // get info out of chunks
2044 static typeArrayOop get_methods(objArrayHandle chunk) {
2045 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2046 assert(methods != NULL, "method array should be initialized in backtrace");
2047 return methods;
2048 }
2049 static typeArrayOop get_bcis(objArrayHandle chunk) {
2050 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2051 assert(bcis != NULL, "bci array should be initialized in backtrace");
2052 return bcis;
2053 }
2054 static objArrayOop get_mirrors(objArrayHandle chunk) {
2055 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2056 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2057 return mirrors;
2058 }
2059 static typeArrayOop get_names(objArrayHandle chunk) {
2060 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2061 assert(names != NULL, "names array should be initialized in backtrace");
2062 return names;
2063 }
2064
2065 public:
2066
2067 // constructor for new backtrace
2068 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2069 expand(CHECK);
2070 _backtrace = Handle(THREAD, _head);
2071 _index = 0;
2072 }
2073
2074 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2075 _methods = get_methods(backtrace);
2076 _bcis = get_bcis(backtrace);
2077 _mirrors = get_mirrors(backtrace);
2078 _names = get_names(backtrace);
2079 assert(_methods->length() == _bcis->length() &&
2080 _methods->length() == _mirrors->length() &&
2081 _mirrors->length() == _names->length(),
2082 "method and source information arrays should match");
2083
2084 // head is the preallocated backtrace
2085 _head = backtrace();
2086 _backtrace = Handle(thread, _head);
2087 _index = 0;
2088 }
2089
2090 void expand(TRAPS) {
2091 objArrayHandle old_head(THREAD, _head);
2092 PauseNoSafepointVerifier pnsv(&_nsv);
2093
2094 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2095 objArrayHandle new_head(THREAD, head);
2096
2097 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2098 typeArrayHandle new_methods(THREAD, methods);
2099
2100 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2101 typeArrayHandle new_bcis(THREAD, bcis);
2102
2103 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2104 objArrayHandle new_mirrors(THREAD, mirrors);
2105
2106 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2107 typeArrayHandle new_names(THREAD, names);
2108
2109 if (!old_head.is_null()) {
2110 old_head->obj_at_put(trace_next_offset, new_head());
2111 }
2112 new_head->obj_at_put(trace_methods_offset, new_methods());
2113 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2114 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2115 new_head->obj_at_put(trace_names_offset, new_names());
2116
2117 _head = new_head();
2118 _methods = new_methods();
2119 _bcis = new_bcis();
2120 _mirrors = new_mirrors();
2121 _names = new_names();
2122 _index = 0;
2123 }
2124
2125 oop backtrace() {
2126 return _backtrace();
2127 }
2128
2129 inline void push(Method* method, int bci, TRAPS) {
2130 // Smear the -1 bci to 0 since the array only holds unsigned
2131 // shorts. The later line number lookup would just smear the -1
2132 // to a 0 even if it could be recorded.
2133 if (bci == SynchronizationEntryBCI) bci = 0;
2134
2135 if (_index >= trace_chunk_size) {
2136 methodHandle mhandle(THREAD, method);
2137 expand(CHECK);
2138 method = mhandle();
2139 }
2140
2141 _methods->ushort_at_put(_index, method->orig_method_idnum());
2142 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2143
2144 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2145 // klass owning the symbols alive so their refcounts aren't decremented.
2146 Symbol* name = method->name();
2147 _names->symbol_at_put(_index, name);
2148
2149 // We need to save the mirrors in the backtrace to keep the class
2150 // from being unloaded while we still have this stack trace.
2151 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2152 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2153 _index++;
2154 }
2155
2156 };
2157
2158 struct BacktraceElement : public StackObj {
2159 int _method_id;
2160 int _bci;
2161 int _version;
2162 Symbol* _name;
2163 Handle _mirror;
2164 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2165 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2166 };
2167
2168 class BacktraceIterator : public StackObj {
2169 int _index;
2170 objArrayHandle _result;
2171 objArrayHandle _mirrors;
2172 typeArrayHandle _methods;
2173 typeArrayHandle _bcis;
2174 typeArrayHandle _names;
2175
2176 void init(objArrayHandle result, Thread* thread) {
2177 // Get method id, bci, version and mirror from chunk
2178 _result = result;
2179 if (_result.not_null()) {
2180 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2181 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2182 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2183 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2184 _index = 0;
2185 }
2186 }
2187 public:
2188 BacktraceIterator(objArrayHandle result, Thread* thread) {
2189 init(result, thread);
2190 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2191 }
2192
2193 BacktraceElement next(Thread* thread) {
2194 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2195 _methods->ushort_at(_index),
2196 Backtrace::version_at(_bcis->int_at(_index)),
2197 Backtrace::bci_at(_bcis->int_at(_index)),
2198 _names->symbol_at(_index));
2199 _index++;
2200
2201 if (_index >= java_lang_Throwable::trace_chunk_size) {
2202 int next_offset = java_lang_Throwable::trace_next_offset;
2203 // Get next chunk
2204 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2205 init(result, thread);
2206 }
2207 return e;
2208 }
2209
2210 bool repeat() {
2211 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2212 }
2213 };
2214
2215
2216 // Print stack trace element to resource allocated buffer
2217 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2218 int version, int bci, Symbol* name) {
2219 ResourceMark rm;
2220
2221 // Get strings and string lengths
2222 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2223 const char* klass_name = holder->external_name();
2224 int buf_len = (int)strlen(klass_name);
2225
2226 char* method_name = name->as_C_string();
2227 buf_len += (int)strlen(method_name);
2228
2229 char* source_file_name = NULL;
2230 Symbol* source = Backtrace::get_source_file_name(holder, version);
2231 if (source != NULL) {
2232 source_file_name = source->as_C_string();
2233 buf_len += (int)strlen(source_file_name);
2234 }
2235
2236 char *module_name = NULL, *module_version = NULL;
2237 ModuleEntry* module = holder->module();
2238 if (module->is_named()) {
2239 module_name = module->name()->as_C_string();
2240 buf_len += (int)strlen(module_name);
2241 if (module->version() != NULL) {
2242 module_version = module->version()->as_C_string();
2243 buf_len += (int)strlen(module_version);
2244 }
2245 }
2246
2247 // Allocate temporary buffer with extra space for formatting and line number
2248 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2249
2250 // Print stack trace line in buffer
2251 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2252
2253 // Print module information
2254 if (module_name != NULL) {
2255 if (module_version != NULL) {
2256 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2257 } else {
2258 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2259 }
2260 }
2261
2262 // The method can be NULL if the requested class version is gone
2263 Method* method = holder->method_with_orig_idnum(method_id, version);
2264 if (!version_matches(method, version)) {
2265 strcat(buf, "Redefined)");
2266 } else {
2267 int line_number = Backtrace::get_line_number(method, bci);
2268 if (line_number == -2) {
2269 strcat(buf, "Native Method)");
2270 } else {
2271 if (source_file_name != NULL && (line_number != -1)) {
2272 // Sourcename and linenumber
2273 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2274 } else if (source_file_name != NULL) {
2275 // Just sourcename
2276 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2277 } else {
2278 // Neither sourcename nor linenumber
2279 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2280 }
2281 CompiledMethod* nm = method->code();
2282 if (WizardMode && nm != NULL) {
2283 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2284 }
2285 }
2286 }
2287
2288 st->print_cr("%s", buf);
2289 }
2290
2291 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2292 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2293 int method_id = method->orig_method_idnum();
2294 int version = method->constants()->version();
2295 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2296 }
2297
2298 /**
2299 * Print the throwable message and its stack trace plus all causes by walking the
2300 * cause chain. The output looks the same as of Throwable.printStackTrace().
2301 */
2302 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2303 // First, print the message.
2304 print(throwable(), st);
2305 st->cr();
2306
2307 // Now print the stack trace.
2308 Thread* THREAD = Thread::current();
2309 while (throwable.not_null()) {
2310 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2311 if (result.is_null()) {
2312 st->print_raw_cr("\t<<no stack trace available>>");
2313 return;
2314 }
2315 BacktraceIterator iter(result, THREAD);
2316
2317 while (iter.repeat()) {
2318 BacktraceElement bte = iter.next(THREAD);
2319 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2320 }
2321 {
2322 // Call getCause() which doesn't necessarily return the _cause field.
2323 EXCEPTION_MARK;
2324 JavaValue cause(T_OBJECT);
2325 JavaCalls::call_virtual(&cause,
2326 throwable,
2327 throwable->klass(),
2328 vmSymbols::getCause_name(),
2329 vmSymbols::void_throwable_signature(),
2330 THREAD);
2331 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2332 if (HAS_PENDING_EXCEPTION) {
2333 CLEAR_PENDING_EXCEPTION;
2334 throwable = Handle();
2335 } else {
2336 throwable = Handle(THREAD, (oop) cause.get_jobject());
2337 if (throwable.not_null()) {
2338 st->print("Caused by: ");
2339 print(throwable(), st);
2340 st->cr();
2341 }
2342 }
2343 }
2344 }
2345 }
2346
2347 /**
2348 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2349 */
2350 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2351 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2352 JavaValue result(T_VOID);
2353 JavaCalls::call_virtual(&result,
2354 throwable,
2355 SystemDictionary::Throwable_klass(),
2356 vmSymbols::printStackTrace_name(),
2357 vmSymbols::void_method_signature(),
2358 THREAD);
2359 }
2360
2361 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2362 if (!StackTraceInThrowable) return;
2363 ResourceMark rm(THREAD);
2364
2365 // Start out by clearing the backtrace for this object, in case the VM
2366 // runs out of memory while allocating the stack trace
2367 set_backtrace(throwable(), NULL);
2368 // Clear lazily constructed Java level stacktrace if refilling occurs
2369 // This is unnecessary in 1.7+ but harmless
2370 clear_stacktrace(throwable());
2371
2372 int max_depth = MaxJavaStackTraceDepth;
2373 JavaThread* thread = (JavaThread*)THREAD;
2374
2375 BacktraceBuilder bt(CHECK);
2376
2377 // If there is no Java frame just return the method that was being called
2378 // with bci 0
2379 if (!thread->has_last_Java_frame()) {
2380 if (max_depth >= 1 && method() != NULL) {
2381 bt.push(method(), 0, CHECK);
2382 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2383 set_depth(throwable(), 1);
2384 set_backtrace(throwable(), bt.backtrace());
2385 }
2386 return;
2387 }
2388
2389 // Instead of using vframe directly, this version of fill_in_stack_trace
2390 // basically handles everything by hand. This significantly improved the
2391 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2392 // See bug 6333838 for more details.
2393 // The "ASSERT" here is to verify this method generates the exactly same stack
2394 // trace as utilizing vframe.
2395 #ifdef ASSERT
2396 vframeStream st(thread);
2397 methodHandle st_method(THREAD, st.method());
2398 #endif
2399 int total_count = 0;
2400 RegisterMap map(thread, false);
2401 int decode_offset = 0;
2402 CompiledMethod* nm = NULL;
2403 bool skip_fillInStackTrace_check = false;
2404 bool skip_throwableInit_check = false;
2405 bool skip_hidden = !ShowHiddenFrames;
2406
2407 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2408 Method* method = NULL;
2409 int bci = 0;
2410
2411 // Compiled java method case.
2412 if (decode_offset != 0) {
2413 DebugInfoReadStream stream(nm, decode_offset);
2414 decode_offset = stream.read_int();
2415 method = (Method*)nm->metadata_at(stream.read_int());
2416 bci = stream.read_bci();
2417 } else {
2418 if (fr.is_first_frame()) break;
2419 address pc = fr.pc();
2420 if (fr.is_interpreted_frame()) {
2421 address bcp = fr.interpreter_frame_bcp();
2422 method = fr.interpreter_frame_method();
2423 bci = method->bci_from(bcp);
2424 fr = fr.sender(&map);
2425 } else {
2426 CodeBlob* cb = fr.cb();
2427 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2428 // but non nmethod
2429 fr = fr.sender(&map);
2430 if (cb == NULL || !cb->is_compiled()) {
2431 continue;
2432 }
2433 nm = cb->as_compiled_method();
2434 if (nm->method()->is_native()) {
2435 method = nm->method();
2436 bci = 0;
2437 } else {
2438 PcDesc* pd = nm->pc_desc_at(pc);
2439 decode_offset = pd->scope_decode_offset();
2440 // if decode_offset is not equal to 0, it will execute the
2441 // "compiled java method case" at the beginning of the loop.
2442 continue;
2443 }
2444 }
2445 }
2446 #ifdef ASSERT
2447 assert(st_method() == method && st.bci() == bci,
2448 "Wrong stack trace");
2449 st.next();
2450 // vframeStream::method isn't GC-safe so store off a copy
2451 // of the Method* in case we GC.
2452 if (!st.at_end()) {
2453 st_method = st.method();
2454 }
2455 #endif
2456
2457 // the format of the stacktrace will be:
2458 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2459 // - 0 or more <init> methods for the exception class (skipped)
2460 // - rest of the stack
2461
2462 if (!skip_fillInStackTrace_check) {
2463 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2464 throwable->is_a(method->method_holder())) {
2465 continue;
2466 }
2467 else {
2468 skip_fillInStackTrace_check = true; // gone past them all
2469 }
2470 }
2471 if (!skip_throwableInit_check) {
2472 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2473
2474 // skip <init> methods of the exception class and superclasses
2475 // This is similar to classic VM (before HotSpot).
2476 if (method->is_object_constructor() &&
2477 throwable->is_a(method->method_holder())) {
2478 continue;
2479 } else {
2480 // there are none or we've seen them all - either way stop checking
2481 skip_throwableInit_check = true;
2482 }
2483 }
2484 if (method->is_hidden()) {
2485 if (skip_hidden) continue;
2486 }
2487 bt.push(method, bci, CHECK);
2488 total_count++;
2489 }
2490
2491 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2492
2493 // Put completed stack trace into throwable object
2494 set_backtrace(throwable(), bt.backtrace());
2495 set_depth(throwable(), total_count);
2496 }
2497
2498 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2499 // No-op if stack trace is disabled
2500 if (!StackTraceInThrowable) {
2501 return;
2502 }
2503
2504 // Disable stack traces for some preallocated out of memory errors
2505 if (!Universe::should_fill_in_stack_trace(throwable)) {
2506 return;
2507 }
2508
2509 PRESERVE_EXCEPTION_MARK;
2510
2511 JavaThread* thread = JavaThread::active();
2512 fill_in_stack_trace(throwable, method, thread);
2513 // ignore exceptions thrown during stack trace filling
2514 CLEAR_PENDING_EXCEPTION;
2515 }
2516
2517 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2518 // Allocate stack trace - backtrace is created but not filled in
2519
2520 // No-op if stack trace is disabled
2521 if (!StackTraceInThrowable) return;
2522 BacktraceBuilder bt(CHECK); // creates a backtrace
2523 set_backtrace(throwable(), bt.backtrace());
2524 }
2525
2526
2527 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2528 // Fill in stack trace into preallocated backtrace (no GC)
2529
2530 // No-op if stack trace is disabled
2531 if (!StackTraceInThrowable) return;
2532
2533 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2534
2535 JavaThread* THREAD = JavaThread::current();
2536
2537 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2538 assert(backtrace.not_null(), "backtrace should have been preallocated");
2539
2540 ResourceMark rm(THREAD);
2541 vframeStream st(THREAD);
2542
2543 BacktraceBuilder bt(THREAD, backtrace);
2544
2545 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2546 // methods as preallocated errors aren't created by "java" code.
2547
2548 // fill in as much stack trace as possible
2549 int chunk_count = 0;
2550 for (;!st.at_end(); st.next()) {
2551 bt.push(st.method(), st.bci(), CHECK);
2552 chunk_count++;
2553
2554 // Bail-out for deep stacks
2555 if (chunk_count >= trace_chunk_size) break;
2556 }
2557 set_depth(throwable(), chunk_count);
2558 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2559
2560 // We support the Throwable immutability protocol defined for Java 7.
2561 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2562 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2563 }
2564
2565 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2566 objArrayHandle stack_trace_array_h, TRAPS) {
2567
2568 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2569 THROW(vmSymbols::java_lang_NullPointerException());
2570 }
2571
2572 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2573
2574 if (stack_trace_array_h->length() != depth(throwable())) {
2575 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2576 }
2577
2578 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2579 BacktraceIterator iter(result, THREAD);
2580
2581 int index = 0;
2582 while (iter.repeat()) {
2583 BacktraceElement bte = iter.next(THREAD);
2584
2585 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2586
2587 if (stack_trace_element.is_null()) {
2588 THROW(vmSymbols::java_lang_NullPointerException());
2589 }
2590
2591 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2592 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2593
2594 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2595 method,
2596 bte._version,
2597 bte._bci,
2598 bte._name, CHECK);
2599 }
2600 }
2601
2602 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2603 // Allocate java.lang.StackTraceElement instance
2604 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2605 assert(k != NULL, "must be loaded in 1.4+");
2606 if (k->should_be_initialized()) {
2607 k->initialize(CHECK_0);
2608 }
2609
2610 Handle element = k->allocate_instance_handle(CHECK_0);
2611
2612 int version = method->constants()->version();
2613 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2614 return element();
2615 }
2616
2617 void java_lang_StackTraceElement::fill_in(Handle element,
2618 InstanceKlass* holder, const methodHandle& method,
2619 int version, int bci, Symbol* name, TRAPS) {
2620 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2621
2622 ResourceMark rm(THREAD);
2623 HandleMark hm(THREAD);
2624
2625 // Fill in class name
2626 Handle java_class(THREAD, holder->java_mirror());
2627 oop classname = java_lang_Class::name(java_class, CHECK);
2628 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2629 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2630
2631 oop loader = holder->class_loader();
2632 if (loader != NULL) {
2633 oop loader_name = java_lang_ClassLoader::name(loader);
2634 if (loader_name != NULL)
2635 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2636 }
2637
2638 // Fill in method name
2639 oop methodname = StringTable::intern(name, CHECK);
2640 java_lang_StackTraceElement::set_methodName(element(), methodname);
2641
2642 // Fill in module name and version
2643 ModuleEntry* module = holder->module();
2644 if (module->is_named()) {
2645 oop module_name = StringTable::intern(module->name(), CHECK);
2646 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2647 oop module_version;
2648 if (module->version() != NULL) {
2649 module_version = StringTable::intern(module->version(), CHECK);
2650 } else {
2651 module_version = NULL;
2652 }
2653 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2654 }
2655
2656 if (method() == NULL || !version_matches(method(), version)) {
2657 // The method was redefined, accurate line number information isn't available
2658 java_lang_StackTraceElement::set_fileName(element(), NULL);
2659 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2660 } else {
2661 // Fill in source file name and line number.
2662 Symbol* source = Backtrace::get_source_file_name(holder, version);
2663 oop source_file = java_lang_Class::source_file(java_class());
2664 if (source != NULL) {
2665 // Class was not redefined. We can trust its cache if set,
2666 // else we have to initialize it.
2667 if (source_file == NULL) {
2668 source_file = StringTable::intern(source, CHECK);
2669 java_lang_Class::set_source_file(java_class(), source_file);
2670 }
2671 } else {
2672 // Class was redefined. Dump the cache if it was set.
2673 if (source_file != NULL) {
2674 source_file = NULL;
2675 java_lang_Class::set_source_file(java_class(), source_file);
2676 }
2677 }
2678 java_lang_StackTraceElement::set_fileName(element(), source_file);
2679
2680 int line_number = Backtrace::get_line_number(method, bci);
2681 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2682 }
2683 }
2684
2685 #if INCLUDE_JVMCI
2686 void java_lang_StackTraceElement::decode(Handle mirror, methodHandle method, int bci, Symbol*& methodname, Symbol*& filename, int& line_number) {
2687 int method_id = method->orig_method_idnum();
2688 int cpref = method->name_index();
2689 decode(mirror, method_id, method->constants()->version(), bci, cpref, methodname, filename, line_number);
2690 }
2691
2692 void java_lang_StackTraceElement::decode(Handle mirror, int method_id, int version, int bci, int cpref, Symbol*& methodname, Symbol*& filename, int& line_number) {
2693 // Fill in class name
2694 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2695 Method* method = holder->method_with_orig_idnum(method_id, version);
2696
2697 // The method can be NULL if the requested class version is gone
2698 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
2699
2700 // Fill in method name
2701 methodname = sym;
2702
2703 if (!version_matches(method, version)) {
2704 // If the method was redefined, accurate line number information isn't available
2705 filename = NULL;
2706 line_number = -1;
2707 } else {
2708 // Fill in source file name and line number.
2709 // Use a specific ik version as a holder since the mirror might
2710 // refer to a version that is now obsolete and no longer accessible
2711 // via the previous versions list.
2712 holder = holder->get_klass_version(version);
2713 assert(holder != NULL, "sanity check");
2714 filename = holder->source_file_name();
2715 line_number = Backtrace::get_line_number(method, bci);
2716 }
2717 }
2718 #endif // INCLUDE_JVMCI
2719
2720 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2721 HandleMark hm(THREAD);
2722 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2723 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2724 // we should expand MemberName::name when Throwable uses StackTrace
2725 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2726 return method;
2727 }
2728
2729 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2730 // set Method* or mid/cpref
2731 HandleMark hm(THREAD);
2732 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2733 InstanceKlass* ik = method->method_holder();
2734 CallInfo info(method(), ik, CHECK);
2735 MethodHandles::init_method_MemberName(mname, info);
2736 // set bci
2737 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2738 // method may be redefined; store the version
2739 int version = method->constants()->version();
2740 assert((jushort)version == version, "version should be short");
2741 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2742 }
2743
2744 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2745 ResourceMark rm(THREAD);
2746 HandleMark hm(THREAD);
2747 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2748 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2749 InstanceKlass* holder = InstanceKlass::cast(clazz);
2750 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2751
2752 short version = stackFrame->short_field(_version_offset);
2753 int bci = stackFrame->int_field(_bci_offset);
2754 Symbol* name = method->name();
2755 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2756 }
2757
2758 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2759 macro(_memberName_offset, k, "memberName", object_signature, false); \
2760 macro(_bci_offset, k, "bci", int_signature, false)
2761
2762 void java_lang_StackFrameInfo::compute_offsets() {
2763 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2764 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2765 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2766 }
2767
2768 #if INCLUDE_CDS
2769 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2770 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2771 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2772 }
2773 #endif
2774
2775 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2776 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2777 macro(_locals_offset, k, "locals", object_array_signature, false); \
2778 macro(_operands_offset, k, "operands", object_array_signature, false); \
2779 macro(_mode_offset, k, "mode", int_signature, false)
2780
2781 void java_lang_LiveStackFrameInfo::compute_offsets() {
2782 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2783 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2784 }
2785
2786 #if INCLUDE_CDS
2787 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2788 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2789 }
2790 #endif
2791
2792 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2793 macro(override_offset, k, "override", bool_signature, false)
2794
2795 void java_lang_reflect_AccessibleObject::compute_offsets() {
2796 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2797 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2798 }
2799
2800 #if INCLUDE_CDS
2801 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2802 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2803 }
2804 #endif
2805
2806 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2807 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2808 return (jboolean) reflect->bool_field(override_offset);
2809 }
2810
2811 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2812 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2813 reflect->bool_field_put(override_offset, (int) value);
2814 }
2815
2816 #define METHOD_FIELDS_DO(macro) \
2817 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2818 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2819 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2820 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2821 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2822 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2823 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2824 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2825 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2826 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2827 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2828
2829 void java_lang_reflect_Method::compute_offsets() {
2830 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2831 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2832 }
2833
2834 #if INCLUDE_CDS
2835 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2836 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2837 }
2838 #endif
2839
2840 Handle java_lang_reflect_Method::create(TRAPS) {
2841 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2842 Klass* klass = SystemDictionary::reflect_Method_klass();
2843 // This class is eagerly initialized during VM initialization, since we keep a refence
2844 // to one of the methods
2845 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2846 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2847 }
2848
2849 oop java_lang_reflect_Method::clazz(oop reflect) {
2850 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2851 return reflect->obj_field(clazz_offset);
2852 }
2853
2854 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2855 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2856 reflect->obj_field_put(clazz_offset, value);
2857 }
2858
2859 int java_lang_reflect_Method::slot(oop reflect) {
2860 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2861 return reflect->int_field(slot_offset);
2862 }
2863
2864 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2865 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2866 reflect->int_field_put(slot_offset, value);
2867 }
2868
2869 void java_lang_reflect_Method::set_name(oop method, oop value) {
2870 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2871 method->obj_field_put(name_offset, value);
2872 }
2873
2874 oop java_lang_reflect_Method::return_type(oop method) {
2875 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2876 return method->obj_field(returnType_offset);
2877 }
2878
2879 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2880 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2881 method->obj_field_put(returnType_offset, value);
2882 }
2883
2884 oop java_lang_reflect_Method::parameter_types(oop method) {
2885 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2886 return method->obj_field(parameterTypes_offset);
2887 }
2888
2889 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2890 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2891 method->obj_field_put(parameterTypes_offset, value);
2892 }
2893
2894 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2896 method->obj_field_put(exceptionTypes_offset, value);
2897 }
2898
2899 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2900 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2901 method->int_field_put(modifiers_offset, value);
2902 }
2903
2904 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2905 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2906 method->obj_field_put(signature_offset, value);
2907 }
2908
2909 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2911 method->obj_field_put(annotations_offset, value);
2912 }
2913
2914 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2916 method->obj_field_put(parameter_annotations_offset, value);
2917 }
2918
2919 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2921 method->obj_field_put(annotation_default_offset, value);
2922 }
2923
2924 #define CONSTRUCTOR_FIELDS_DO(macro) \
2925 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2926 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2927 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2928 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2929 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2930 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2931 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2932 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2933
2934 void java_lang_reflect_Constructor::compute_offsets() {
2935 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2936 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2937 }
2938
2939 #if INCLUDE_CDS
2940 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2941 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2942 }
2943 #endif
2944
2945 Handle java_lang_reflect_Constructor::create(TRAPS) {
2946 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2947 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2948 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2949 InstanceKlass* ik = InstanceKlass::cast(k);
2950 // Ensure it is initialized
2951 ik->initialize(CHECK_NH);
2952 return ik->allocate_instance_handle(THREAD);
2953 }
2954
2955 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2956 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2957 return reflect->obj_field(clazz_offset);
2958 }
2959
2960 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2961 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2962 reflect->obj_field_put(clazz_offset, value);
2963 }
2964
2965 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2966 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2967 return constructor->obj_field(parameterTypes_offset);
2968 }
2969
2970 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2972 constructor->obj_field_put(parameterTypes_offset, value);
2973 }
2974
2975 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2976 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2977 constructor->obj_field_put(exceptionTypes_offset, value);
2978 }
2979
2980 int java_lang_reflect_Constructor::slot(oop reflect) {
2981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2982 return reflect->int_field(slot_offset);
2983 }
2984
2985 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2986 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2987 reflect->int_field_put(slot_offset, value);
2988 }
2989
2990 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2992 constructor->int_field_put(modifiers_offset, value);
2993 }
2994
2995 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2996 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2997 constructor->obj_field_put(signature_offset, value);
2998 }
2999
3000 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3002 constructor->obj_field_put(annotations_offset, value);
3003 }
3004
3005 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3007 method->obj_field_put(parameter_annotations_offset, value);
3008 }
3009
3010 #define FIELD_FIELDS_DO(macro) \
3011 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3012 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3013 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
3014 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3015 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3016 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3017 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3018
3019 void java_lang_reflect_Field::compute_offsets() {
3020 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3021 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3022 }
3023
3024 #if INCLUDE_CDS
3025 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3026 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3027 }
3028 #endif
3029
3030 Handle java_lang_reflect_Field::create(TRAPS) {
3031 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3032 Symbol* name = vmSymbols::java_lang_reflect_Field();
3033 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3034 InstanceKlass* ik = InstanceKlass::cast(k);
3035 // Ensure it is initialized
3036 ik->initialize(CHECK_NH);
3037 return ik->allocate_instance_handle(THREAD);
3038 }
3039
3040 oop java_lang_reflect_Field::clazz(oop reflect) {
3041 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3042 return reflect->obj_field(clazz_offset);
3043 }
3044
3045 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3046 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3047 reflect->obj_field_put(clazz_offset, value);
3048 }
3049
3050 oop java_lang_reflect_Field::name(oop field) {
3051 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3052 return field->obj_field(name_offset);
3053 }
3054
3055 void java_lang_reflect_Field::set_name(oop field, oop value) {
3056 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3057 field->obj_field_put(name_offset, value);
3058 }
3059
3060 oop java_lang_reflect_Field::type(oop field) {
3061 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3062 return field->obj_field(type_offset);
3063 }
3064
3065 void java_lang_reflect_Field::set_type(oop field, oop value) {
3066 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3067 field->obj_field_put(type_offset, value);
3068 }
3069
3070 int java_lang_reflect_Field::slot(oop reflect) {
3071 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3072 return reflect->int_field(slot_offset);
3073 }
3074
3075 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3076 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3077 reflect->int_field_put(slot_offset, value);
3078 }
3079
3080 int java_lang_reflect_Field::modifiers(oop field) {
3081 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3082 return field->int_field(modifiers_offset);
3083 }
3084
3085 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3086 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3087 field->int_field_put(modifiers_offset, value);
3088 }
3089
3090 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3091 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3092 field->obj_field_put(signature_offset, value);
3093 }
3094
3095 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3096 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3097 field->obj_field_put(annotations_offset, value);
3098 }
3099
3100 #define CONSTANTPOOL_FIELDS_DO(macro) \
3101 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3102
3103 void reflect_ConstantPool::compute_offsets() {
3104 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3105 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3106 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3107 }
3108
3109 #if INCLUDE_CDS
3110 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3111 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3112 }
3113 #endif
3114
3115 #define PARAMETER_FIELDS_DO(macro) \
3116 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3117 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3118 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3119 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3120
3121 void java_lang_reflect_Parameter::compute_offsets() {
3122 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3123 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3124 }
3125
3126 #if INCLUDE_CDS
3127 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3128 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3129 }
3130 #endif
3131
3132 Handle java_lang_reflect_Parameter::create(TRAPS) {
3133 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3134 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3135 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3136 InstanceKlass* ik = InstanceKlass::cast(k);
3137 // Ensure it is initialized
3138 ik->initialize(CHECK_NH);
3139 return ik->allocate_instance_handle(THREAD);
3140 }
3141
3142 oop java_lang_reflect_Parameter::name(oop param) {
3143 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3144 return param->obj_field(name_offset);
3145 }
3146
3147 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3148 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3149 param->obj_field_put(name_offset, value);
3150 }
3151
3152 int java_lang_reflect_Parameter::modifiers(oop param) {
3153 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3154 return param->int_field(modifiers_offset);
3155 }
3156
3157 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3158 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3159 param->int_field_put(modifiers_offset, value);
3160 }
3161
3162 int java_lang_reflect_Parameter::index(oop param) {
3163 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3164 return param->int_field(index_offset);
3165 }
3166
3167 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3168 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3169 param->int_field_put(index_offset, value);
3170 }
3171
3172 oop java_lang_reflect_Parameter::executable(oop param) {
3173 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3174 return param->obj_field(executable_offset);
3175 }
3176
3177 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3178 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3179 param->obj_field_put(executable_offset, value);
3180 }
3181
3182
3183 int java_lang_Module::loader_offset;
3184 int java_lang_Module::name_offset;
3185 int java_lang_Module::_module_entry_offset = -1;
3186
3187 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3188 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3189 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3190 vmSymbols::java_lang_module_init_signature(),
3191 loader, module_name, CHECK_NH);
3192 }
3193
3194 #define MODULE_FIELDS_DO(macro) \
3195 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3196 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3197
3198 void java_lang_Module::compute_offsets() {
3199 InstanceKlass* k = SystemDictionary::Module_klass();
3200 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3201 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3202 }
3203
3204 #if INCLUDE_CDS
3205 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3206 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3207 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3208 }
3209 #endif
3210
3211 oop java_lang_Module::loader(oop module) {
3212 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3213 return module->obj_field(loader_offset);
3214 }
3215
3216 void java_lang_Module::set_loader(oop module, oop value) {
3217 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3218 module->obj_field_put(loader_offset, value);
3219 }
3220
3221 oop java_lang_Module::name(oop module) {
3222 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3223 return module->obj_field(name_offset);
3224 }
3225
3226 void java_lang_Module::set_name(oop module, oop value) {
3227 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3228 module->obj_field_put(name_offset, value);
3229 }
3230
3231 ModuleEntry* java_lang_Module::module_entry(oop module) {
3232 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3233 assert(module != NULL, "module can't be null");
3234 assert(oopDesc::is_oop(module), "module must be oop");
3235
3236 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3237 if (module_entry == NULL) {
3238 // If the inject field containing the ModuleEntry* is null then return the
3239 // class loader's unnamed module.
3240 oop loader = java_lang_Module::loader(module);
3241 Handle h_loader = Handle(Thread::current(), loader);
3242 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3243 return loader_cld->unnamed_module();
3244 }
3245 return module_entry;
3246 }
3247
3248 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3249 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3250 assert(module != NULL, "module can't be null");
3251 assert(oopDesc::is_oop(module), "module must be oop");
3252 module->address_field_put(_module_entry_offset, (address)module_entry);
3253 }
3254
3255 Handle reflect_ConstantPool::create(TRAPS) {
3256 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3257 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3258 // Ensure it is initialized
3259 k->initialize(CHECK_NH);
3260 return k->allocate_instance_handle(THREAD);
3261 }
3262
3263
3264 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3265 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3266 oop mirror = value->pool_holder()->java_mirror();
3267 // Save the mirror to get back the constant pool.
3268 reflect->obj_field_put(_oop_offset, mirror);
3269 }
3270
3271 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3272 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3273
3274 oop mirror = reflect->obj_field(_oop_offset);
3275 Klass* k = java_lang_Class::as_Klass(mirror);
3276 assert(k->is_instance_klass(), "Must be");
3277
3278 // Get the constant pool back from the klass. Since class redefinition
3279 // merges the new constant pool into the old, this is essentially the
3280 // same constant pool as the original. If constant pool merging is
3281 // no longer done in the future, this will have to change to save
3282 // the original.
3283 return InstanceKlass::cast(k)->constants();
3284 }
3285
3286 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3287 macro(_base_offset, k, "base", object_signature, false)
3288
3289 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3290 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3291 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3292 }
3293
3294 #if INCLUDE_CDS
3295 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3296 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3297 }
3298 #endif
3299
3300 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3301 Klass* k = SystemDictionary::box_klass(type);
3302 if (k == NULL) return NULL;
3303 InstanceKlass* ik = InstanceKlass::cast(k);
3304 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3305 return ik->allocate_instance(THREAD);
3306 }
3307
3308
3309 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3310 oop box = initialize_and_allocate(type, CHECK_0);
3311 if (box == NULL) return NULL;
3312 switch (type) {
3313 case T_BOOLEAN:
3314 box->bool_field_put(value_offset, value->z);
3315 break;
3316 case T_CHAR:
3317 box->char_field_put(value_offset, value->c);
3318 break;
3319 case T_FLOAT:
3320 box->float_field_put(value_offset, value->f);
3321 break;
3322 case T_DOUBLE:
3323 box->double_field_put(long_value_offset, value->d);
3324 break;
3325 case T_BYTE:
3326 box->byte_field_put(value_offset, value->b);
3327 break;
3328 case T_SHORT:
3329 box->short_field_put(value_offset, value->s);
3330 break;
3331 case T_INT:
3332 box->int_field_put(value_offset, value->i);
3333 break;
3334 case T_LONG:
3335 box->long_field_put(long_value_offset, value->j);
3336 break;
3337 default:
3338 return NULL;
3339 }
3340 return box;
3341 }
3342
3343
3344 BasicType java_lang_boxing_object::basic_type(oop box) {
3345 if (box == NULL) return T_ILLEGAL;
3346 BasicType type = SystemDictionary::box_klass_type(box->klass());
3347 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3348 return T_ILLEGAL;
3349 return type;
3350 }
3351
3352
3353 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3354 BasicType type = SystemDictionary::box_klass_type(box->klass());
3355 switch (type) {
3356 case T_BOOLEAN:
3357 value->z = box->bool_field(value_offset);
3358 break;
3359 case T_CHAR:
3360 value->c = box->char_field(value_offset);
3361 break;
3362 case T_FLOAT:
3363 value->f = box->float_field(value_offset);
3364 break;
3365 case T_DOUBLE:
3366 value->d = box->double_field(long_value_offset);
3367 break;
3368 case T_BYTE:
3369 value->b = box->byte_field(value_offset);
3370 break;
3371 case T_SHORT:
3372 value->s = box->short_field(value_offset);
3373 break;
3374 case T_INT:
3375 value->i = box->int_field(value_offset);
3376 break;
3377 case T_LONG:
3378 value->j = box->long_field(long_value_offset);
3379 break;
3380 default:
3381 return T_ILLEGAL;
3382 } // end switch
3383 return type;
3384 }
3385
3386
3387 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3388 BasicType type = SystemDictionary::box_klass_type(box->klass());
3389 switch (type) {
3390 case T_BOOLEAN:
3391 box->bool_field_put(value_offset, value->z);
3392 break;
3393 case T_CHAR:
3394 box->char_field_put(value_offset, value->c);
3395 break;
3396 case T_FLOAT:
3397 box->float_field_put(value_offset, value->f);
3398 break;
3399 case T_DOUBLE:
3400 box->double_field_put(long_value_offset, value->d);
3401 break;
3402 case T_BYTE:
3403 box->byte_field_put(value_offset, value->b);
3404 break;
3405 case T_SHORT:
3406 box->short_field_put(value_offset, value->s);
3407 break;
3408 case T_INT:
3409 box->int_field_put(value_offset, value->i);
3410 break;
3411 case T_LONG:
3412 box->long_field_put(long_value_offset, value->j);
3413 break;
3414 default:
3415 return T_ILLEGAL;
3416 } // end switch
3417 return type;
3418 }
3419
3420
3421 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3422 switch (type) {
3423 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3424 case T_CHAR: st->print("%d", value->c); break;
3425 case T_BYTE: st->print("%d", value->b); break;
3426 case T_SHORT: st->print("%d", value->s); break;
3427 case T_INT: st->print("%d", value->i); break;
3428 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3429 case T_FLOAT: st->print("%f", value->f); break;
3430 case T_DOUBLE: st->print("%lf", value->d); break;
3431 default: st->print("type %d?", type); break;
3432 }
3433 }
3434
3435 // Support for java_lang_ref_Reference
3436
3437 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3438 assert(obj != NULL, "sanity");
3439 if (offset != java_lang_ref_Reference::referent_offset) {
3440 return false;
3441 }
3442
3443 Klass* k = obj->klass();
3444 if (!k->is_instance_klass()) {
3445 return false;
3446 }
3447
3448 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3449 bool is_reference = ik->reference_type() != REF_NONE;
3450 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3451 return is_reference;
3452 }
3453
3454 // Support for java_lang_ref_SoftReference
3455 //
3456
3457 #define SOFTREFERENCE_FIELDS_DO(macro) \
3458 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3459 macro(static_clock_offset, k, "clock", long_signature, true)
3460
3461 void java_lang_ref_SoftReference::compute_offsets() {
3462 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3463 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3464 }
3465
3466 #if INCLUDE_CDS
3467 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3468 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3469 }
3470 #endif
3471
3472 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3473 return ref->long_field(timestamp_offset);
3474 }
3475
3476 jlong java_lang_ref_SoftReference::clock() {
3477 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3478 oop base = ik->static_field_base_raw();
3479 return base->long_field(static_clock_offset);
3480 }
3481
3482 void java_lang_ref_SoftReference::set_clock(jlong value) {
3483 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3484 oop base = ik->static_field_base_raw();
3485 base->long_field_put(static_clock_offset, value);
3486 }
3487
3488 // Support for java_lang_invoke_DirectMethodHandle
3489
3490 int java_lang_invoke_DirectMethodHandle::_member_offset;
3491
3492 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3493 oop member_name = NULL;
3494 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3495 "a DirectMethodHandle oop is expected");
3496 return dmh->obj_field(member_offset_in_bytes());
3497 }
3498
3499 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3500 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3501
3502 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3503 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3504 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3505 }
3506
3507 #if INCLUDE_CDS
3508 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3509 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3510 }
3511 #endif
3512
3513 // Support for java_lang_invoke_MethodHandle
3514
3515 int java_lang_invoke_MethodHandle::_type_offset;
3516 int java_lang_invoke_MethodHandle::_form_offset;
3517
3518 int java_lang_invoke_MemberName::_clazz_offset;
3519 int java_lang_invoke_MemberName::_name_offset;
3520 int java_lang_invoke_MemberName::_type_offset;
3521 int java_lang_invoke_MemberName::_flags_offset;
3522 int java_lang_invoke_MemberName::_method_offset;
3523 int java_lang_invoke_MemberName::_vmindex_offset;
3524
3525 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3526 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3527
3528 int java_lang_invoke_LambdaForm::_vmentry_offset;
3529
3530 #define METHODHANDLE_FIELDS_DO(macro) \
3531 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3532 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3533
3534 void java_lang_invoke_MethodHandle::compute_offsets() {
3535 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3536 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3537 }
3538
3539 #if INCLUDE_CDS
3540 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3541 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3542 }
3543 #endif
3544
3545 #define MEMBERNAME_FIELDS_DO(macro) \
3546 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3547 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3548 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3549 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3550 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3551
3552 void java_lang_invoke_MemberName::compute_offsets() {
3553 InstanceKlass* k = SystemDictionary::MemberName_klass();
3554 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3555 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3556 }
3557
3558 #if INCLUDE_CDS
3559 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3560 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3561 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3562 }
3563 #endif
3564
3565 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3566 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3567 assert(k != NULL, "jdk mismatch");
3568 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3569 }
3570
3571 #if INCLUDE_CDS
3572 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3573 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3574 }
3575 #endif
3576
3577 #define LAMBDAFORM_FIELDS_DO(macro) \
3578 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3579
3580 void java_lang_invoke_LambdaForm::compute_offsets() {
3581 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3582 assert (k != NULL, "jdk mismatch");
3583 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3584 }
3585
3586 #if INCLUDE_CDS
3587 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3588 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3589 }
3590 #endif
3591
3592 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3593 return obj != NULL && is_subclass(obj->klass());
3594 }
3595
3596
3597 oop java_lang_invoke_MethodHandle::type(oop mh) {
3598 return mh->obj_field(_type_offset);
3599 }
3600
3601 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3602 mh->obj_field_put(_type_offset, mtype);
3603 }
3604
3605 oop java_lang_invoke_MethodHandle::form(oop mh) {
3606 assert(_form_offset != 0, "");
3607 return mh->obj_field(_form_offset);
3608 }
3609
3610 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3611 assert(_form_offset != 0, "");
3612 mh->obj_field_put(_form_offset, lform);
3613 }
3614
3615 /// MemberName accessors
3616
3617 oop java_lang_invoke_MemberName::clazz(oop mname) {
3618 assert(is_instance(mname), "wrong type");
3619 return mname->obj_field(_clazz_offset);
3620 }
3621
3622 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3623 assert(is_instance(mname), "wrong type");
3624 mname->obj_field_put(_clazz_offset, clazz);
3625 }
3626
3627 oop java_lang_invoke_MemberName::name(oop mname) {
3628 assert(is_instance(mname), "wrong type");
3629 return mname->obj_field(_name_offset);
3630 }
3631
3632 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3633 assert(is_instance(mname), "wrong type");
3634 mname->obj_field_put(_name_offset, name);
3635 }
3636
3637 oop java_lang_invoke_MemberName::type(oop mname) {
3638 assert(is_instance(mname), "wrong type");
3639 return mname->obj_field(_type_offset);
3640 }
3641
3642 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3643 assert(is_instance(mname), "wrong type");
3644 mname->obj_field_put(_type_offset, type);
3645 }
3646
3647 int java_lang_invoke_MemberName::flags(oop mname) {
3648 assert(is_instance(mname), "wrong type");
3649 return mname->int_field(_flags_offset);
3650 }
3651
3652 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3653 assert(is_instance(mname), "wrong type");
3654 mname->int_field_put(_flags_offset, flags);
3655 }
3656
3657
3658 // Return vmtarget from ResolvedMethodName method field through indirection
3659 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3660 assert(is_instance(mname), "wrong type");
3661 oop method = mname->obj_field(_method_offset);
3662 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3663 }
3664
3665 bool java_lang_invoke_MemberName::is_method(oop mname) {
3666 assert(is_instance(mname), "must be MemberName");
3667 return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0;
3668 }
3669
3670 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3671 assert(is_instance(mname), "wrong type");
3672 mname->obj_field_put(_method_offset, resolved_method);
3673 }
3674
3675 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3676 assert(is_instance(mname), "wrong type");
3677 return (intptr_t) mname->address_field(_vmindex_offset);
3678 }
3679
3680 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3681 assert(is_instance(mname), "wrong type");
3682 mname->address_field_put(_vmindex_offset, (address) index);
3683 }
3684
3685
3686 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3687 assert(is_instance(resolved_method), "wrong type");
3688 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3689 assert(m->is_method(), "must be");
3690 return m;
3691 }
3692
3693 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3694 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3695 assert(is_instance(resolved_method), "wrong type");
3696 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3697 }
3698
3699 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
3700 assert(is_instance(resolved_method), "wrong type");
3701 resolved_method->obj_field_put(_vmholder_offset, holder);
3702 }
3703
3704 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3705 const Method* method = m();
3706
3707 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3708 oop resolved_method = ResolvedMethodTable::find_method(method);
3709 if (resolved_method != NULL) {
3710 return resolved_method;
3711 }
3712
3713 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3714 if (!k->is_initialized()) {
3715 k->initialize(CHECK_NULL);
3716 }
3717
3718 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3719
3720 NoSafepointVerifier nsv;
3721
3722 if (method->is_old()) {
3723 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
3724 method->get_new_method();
3725 }
3726
3727 InstanceKlass* holder = method->method_holder();
3728
3729 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
3730 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3731 // distinct loaders) to ensure the metadata is kept alive.
3732 // This mirror may be different than the one in clazz field.
3733 set_vmholder(new_resolved_method, holder->java_mirror());
3734
3735 // Set flag in class to indicate this InstanceKlass has entries in the table
3736 // to avoid walking table during redefinition if none of the redefined classes
3737 // have any membernames in the table.
3738 holder->set_has_resolved_methods();
3739
3740 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
3741 }
3742
3743 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3744 assert(is_instance(lform), "wrong type");
3745 return lform->obj_field(_vmentry_offset);
3746 }
3747
3748
3749 // Support for java_lang_invoke_MethodType
3750
3751 int java_lang_invoke_MethodType::_rtype_offset;
3752 int java_lang_invoke_MethodType::_ptypes_offset;
3753
3754 #define METHODTYPE_FIELDS_DO(macro) \
3755 macro(_rtype_offset, k, "rtype", class_signature, false); \
3756 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3757
3758 void java_lang_invoke_MethodType::compute_offsets() {
3759 InstanceKlass* k = SystemDictionary::MethodType_klass();
3760 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3761 }
3762
3763 #if INCLUDE_CDS
3764 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3765 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3766 }
3767 #endif
3768
3769 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3770 st->print("(");
3771 objArrayOop pts = ptypes(mt);
3772 for (int i = 0, limit = pts->length(); i < limit; i++) {
3773 java_lang_Class::print_signature(pts->obj_at(i), st);
3774 }
3775 st->print(")");
3776 java_lang_Class::print_signature(rtype(mt), st);
3777 }
3778
3779 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
3780 ResourceMark rm;
3781 stringStream buffer(128);
3782 print_signature(mt, &buffer);
3783 const char* sigstr = buffer.base();
3784 int siglen = (int) buffer.size();
3785 Symbol *name;
3786 if (!intern_if_not_found) {
3787 name = SymbolTable::probe(sigstr, siglen);
3788 } else {
3789 name = SymbolTable::new_symbol(sigstr, siglen);
3790 }
3791 return name;
3792 }
3793
3794 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3795 if (mt1 == mt2)
3796 return true;
3797 if (rtype(mt1) != rtype(mt2))
3798 return false;
3799 if (ptype_count(mt1) != ptype_count(mt2))
3800 return false;
3801 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3802 if (ptype(mt1, i) != ptype(mt2, i))
3803 return false;
3804 }
3805 return true;
3806 }
3807
3808 oop java_lang_invoke_MethodType::rtype(oop mt) {
3809 assert(is_instance(mt), "must be a MethodType");
3810 return mt->obj_field(_rtype_offset);
3811 }
3812
3813 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3814 assert(is_instance(mt), "must be a MethodType");
3815 return (objArrayOop) mt->obj_field(_ptypes_offset);
3816 }
3817
3818 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3819 return ptypes(mt)->obj_at(idx);
3820 }
3821
3822 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3823 return ptypes(mt)->length();
3824 }
3825
3826 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3827 objArrayOop pts = ptypes(mt);
3828 int count = pts->length();
3829 int slots = 0;
3830 for (int i = 0; i < count; i++) {
3831 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3832 slots += type2size[bt];
3833 }
3834 return slots;
3835 }
3836
3837 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3838 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3839 return type2size[bt];
3840 }
3841
3842
3843 // Support for java_lang_invoke_CallSite
3844
3845 int java_lang_invoke_CallSite::_target_offset;
3846 int java_lang_invoke_CallSite::_context_offset;
3847
3848 #define CALLSITE_FIELDS_DO(macro) \
3849 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3850 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3851
3852 void java_lang_invoke_CallSite::compute_offsets() {
3853 InstanceKlass* k = SystemDictionary::CallSite_klass();
3854 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3855 }
3856
3857 #if INCLUDE_CDS
3858 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3859 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3860 }
3861 #endif
3862
3863 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3864 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3865
3866 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3867 return dep_oop;
3868 }
3869
3870 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3871
3872 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3873 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3874
3875 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3876 InstanceKlass* k = SystemDictionary::Context_klass();
3877 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3878 }
3879
3880 #if INCLUDE_CDS
3881 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3882 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3883 }
3884 #endif
3885
3886 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3887 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3888 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3889 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3890 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3891 return dep_ctx;
3892 }
3893
3894 // Support for java_security_AccessControlContext
3895
3896 int java_security_AccessControlContext::_context_offset = 0;
3897 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3898 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3899 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3900
3901 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3902 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3903 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3904 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3905 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3906
3907 void java_security_AccessControlContext::compute_offsets() {
3908 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3909 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3910 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3911 }
3912
3913 #if INCLUDE_CDS
3914 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3915 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3916 }
3917 #endif
3918
3919 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3920 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3921 // Ensure klass is initialized
3922 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3923 // Allocate result
3924 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3925 // Fill in values
3926 result->obj_field_put(_context_offset, context());
3927 result->obj_field_put(_privilegedContext_offset, privileged_context());
3928 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3929 // whitelist AccessControlContexts created by the JVM if present
3930 if (_isAuthorized_offset != -1) {
3931 result->bool_field_put(_isAuthorized_offset, true);
3932 }
3933 return result;
3934 }
3935
3936
3937 // Support for java_lang_ClassLoader
3938
3939 bool java_lang_ClassLoader::offsets_computed = false;
3940 int java_lang_ClassLoader::_loader_data_offset = -1;
3941 int java_lang_ClassLoader::parallelCapable_offset = -1;
3942 int java_lang_ClassLoader::name_offset = -1;
3943 int java_lang_ClassLoader::nameAndId_offset = -1;
3944 int java_lang_ClassLoader::unnamedModule_offset = -1;
3945
3946 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3947 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3948 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3949 }
3950
3951 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3952 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3953 return RawAccess<>::load_at(loader, _loader_data_offset);
3954 }
3955
3956 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3957 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3958 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3959 }
3960
3961 #define CLASSLOADER_FIELDS_DO(macro) \
3962 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3963 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3964 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3965 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3966 macro(parent_offset, k1, "parent", classloader_signature, false)
3967
3968 void java_lang_ClassLoader::compute_offsets() {
3969 assert(!offsets_computed, "offsets should be initialized only once");
3970 offsets_computed = true;
3971
3972 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3973 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3974
3975 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3976 }
3977
3978 #if INCLUDE_CDS
3979 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3980 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3981 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3982 }
3983 #endif
3984
3985 oop java_lang_ClassLoader::parent(oop loader) {
3986 assert(is_instance(loader), "loader must be oop");
3987 return loader->obj_field(parent_offset);
3988 }
3989
3990 // Returns the name field of this class loader. If the name field has not
3991 // been set, null will be returned.
3992 oop java_lang_ClassLoader::name(oop loader) {
3993 assert(is_instance(loader), "loader must be oop");
3994 return loader->obj_field(name_offset);
3995 }
3996
3997 // Returns the nameAndId field of this class loader. The format is
3998 // as follows:
3999 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4000 // If the defining loader has no name then <qualified-class-name> @<id>
4001 // If built-in loader, then omit '@<id>' as there is only one instance.
4002 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4003 oop java_lang_ClassLoader::nameAndId(oop loader) {
4004 assert(is_instance(loader), "loader must be oop");
4005 return loader->obj_field(nameAndId_offset);
4006 }
4007
4008 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4009 assert(is_instance(loader), "loader must be oop");
4010 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
4011 oop acl = loader;
4012 debug_only(jint loop_count = 0);
4013 // This loop taken verbatim from ClassLoader.java:
4014 do {
4015 acl = parent(acl);
4016 if (cl == acl) {
4017 return true;
4018 }
4019 assert(++loop_count > 0, "loop_count overflow");
4020 } while (acl != NULL);
4021 return false;
4022 }
4023
4024 bool java_lang_ClassLoader::is_instance(oop obj) {
4025 return obj != NULL && is_subclass(obj->klass());
4026 }
4027
4028
4029 // For class loader classes, parallelCapable defined
4030 // based on non-null field
4031 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4032 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4033 if (parallelCapable_offset == -1) {
4034 // Default for backward compatibility is false
4035 return false;
4036 }
4037 return (class_loader->obj_field(parallelCapable_offset) != NULL);
4038 }
4039
4040 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4041 // Fix for 4474172; see evaluation for more details
4042 loader = non_reflection_class_loader(loader);
4043
4044 oop cl = SystemDictionary::java_system_loader();
4045 while(cl != NULL) {
4046 if (cl == loader) return true;
4047 cl = parent(cl);
4048 }
4049 return false;
4050 }
4051
4052 // Return true if this is one of the class loaders associated with
4053 // the generated bytecodes for reflection.
4054 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4055 if (loader != NULL) {
4056 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4057 // This might be null in non-1.4 JDKs
4058 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4059 }
4060 return false;
4061 }
4062
4063 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4064 // See whether this is one of the class loaders associated with
4065 // the generated bytecodes for reflection, and if so, "magically"
4066 // delegate to its parent to prevent class loading from occurring
4067 // in places where applications using reflection didn't expect it.
4068 if (is_reflection_class_loader(loader)) {
4069 return parent(loader);
4070 }
4071 return loader;
4072 }
4073
4074 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4075 assert(is_instance(loader), "loader must be oop");
4076 return loader->obj_field(unnamedModule_offset);
4077 }
4078
4079 // Support for java_lang_System
4080 //
4081 #define SYSTEM_FIELDS_DO(macro) \
4082 macro(static_in_offset, k, "in", input_stream_signature, true); \
4083 macro(static_out_offset, k, "out", print_stream_signature, true); \
4084 macro(static_err_offset, k, "err", print_stream_signature, true); \
4085 macro(static_security_offset, k, "security", security_manager_signature, true)
4086
4087 void java_lang_System::compute_offsets() {
4088 InstanceKlass* k = SystemDictionary::System_klass();
4089 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4090 }
4091
4092 #if INCLUDE_CDS
4093 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4094 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4095 }
4096 #endif
4097
4098 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4099 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4100 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4101
4102 // Support for jdk_internal_misc_UnsafeConstants
4103 //
4104 class UnsafeConstantsFixup : public FieldClosure {
4105 private:
4106 int _address_size;
4107 int _page_size;
4108 bool _big_endian;
4109 bool _use_unaligned_access;
4110 int _data_cache_line_flush_size;
4111 public:
4112 UnsafeConstantsFixup() {
4113 // round up values for all static final fields
4114 _address_size = sizeof(void*);
4115 _page_size = os::vm_page_size();
4116 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4117 _use_unaligned_access = UseUnalignedAccesses;
4118 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4119 }
4120
4121 void do_field(fieldDescriptor* fd) {
4122 oop mirror = fd->field_holder()->java_mirror();
4123 assert(mirror != NULL, "UnsafeConstants must have mirror already");
4124 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4125 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4126 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4127 if (fd->name() == vmSymbols::address_size_name()) {
4128 mirror->int_field_put(fd->offset(), _address_size);
4129 } else if (fd->name() == vmSymbols::page_size_name()) {
4130 mirror->int_field_put(fd->offset(), _page_size);
4131 } else if (fd->name() == vmSymbols::big_endian_name()) {
4132 mirror->bool_field_put(fd->offset(), _big_endian);
4133 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4134 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4135 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4136 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4137 } else {
4138 assert(false, "unexpected UnsafeConstants field");
4139 }
4140 }
4141 };
4142
4143 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4144 UnsafeConstantsFixup fixup;
4145 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4146 }
4147
4148 int java_lang_Class::_klass_offset;
4149 int java_lang_Class::_array_klass_offset;
4150 int java_lang_Class::_oop_size_offset;
4151 int java_lang_Class::_static_oop_field_count_offset;
4152 int java_lang_Class::_class_loader_offset;
4153 int java_lang_Class::_module_offset;
4154 int java_lang_Class::_protection_domain_offset;
4155 int java_lang_Class::_component_mirror_offset;
4156 int java_lang_Class::_inline_mirror_offset;
4157 int java_lang_Class::_indirect_mirror_offset;
4158 int java_lang_Class::_init_lock_offset;
4159 int java_lang_Class::_signers_offset;
4160 int java_lang_Class::_name_offset;
4161 int java_lang_Class::_source_file_offset;
4162 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4163 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4164 int java_lang_Throwable::backtrace_offset;
4165 int java_lang_Throwable::detailMessage_offset;
4166 int java_lang_Throwable::stackTrace_offset;
4167 int java_lang_Throwable::depth_offset;
4168 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4169 int java_lang_reflect_AccessibleObject::override_offset;
4170 int java_lang_reflect_Method::clazz_offset;
4171 int java_lang_reflect_Method::name_offset;
4172 int java_lang_reflect_Method::returnType_offset;
4173 int java_lang_reflect_Method::parameterTypes_offset;
4174 int java_lang_reflect_Method::exceptionTypes_offset;
4175 int java_lang_reflect_Method::slot_offset;
4176 int java_lang_reflect_Method::modifiers_offset;
4177 int java_lang_reflect_Method::signature_offset;
4178 int java_lang_reflect_Method::annotations_offset;
4179 int java_lang_reflect_Method::parameter_annotations_offset;
4180 int java_lang_reflect_Method::annotation_default_offset;
4181 int java_lang_reflect_Constructor::clazz_offset;
4182 int java_lang_reflect_Constructor::parameterTypes_offset;
4183 int java_lang_reflect_Constructor::exceptionTypes_offset;
4184 int java_lang_reflect_Constructor::slot_offset;
4185 int java_lang_reflect_Constructor::modifiers_offset;
4186 int java_lang_reflect_Constructor::signature_offset;
4187 int java_lang_reflect_Constructor::annotations_offset;
4188 int java_lang_reflect_Constructor::parameter_annotations_offset;
4189 int java_lang_reflect_Field::clazz_offset;
4190 int java_lang_reflect_Field::name_offset;
4191 int java_lang_reflect_Field::type_offset;
4192 int java_lang_reflect_Field::slot_offset;
4193 int java_lang_reflect_Field::modifiers_offset;
4194 int java_lang_reflect_Field::signature_offset;
4195 int java_lang_reflect_Field::annotations_offset;
4196 int java_lang_reflect_Parameter::name_offset;
4197 int java_lang_reflect_Parameter::modifiers_offset;
4198 int java_lang_reflect_Parameter::index_offset;
4199 int java_lang_reflect_Parameter::executable_offset;
4200 int java_lang_boxing_object::value_offset;
4201 int java_lang_boxing_object::long_value_offset;
4202 int java_lang_ref_Reference::referent_offset;
4203 int java_lang_ref_Reference::queue_offset;
4204 int java_lang_ref_Reference::next_offset;
4205 int java_lang_ref_Reference::discovered_offset;
4206 int java_lang_ref_SoftReference::timestamp_offset;
4207 int java_lang_ref_SoftReference::static_clock_offset;
4208 int java_lang_ClassLoader::parent_offset;
4209 int java_lang_System::static_in_offset;
4210 int java_lang_System::static_out_offset;
4211 int java_lang_System::static_err_offset;
4212 int java_lang_System::static_security_offset;
4213 int java_lang_StackTraceElement::methodName_offset;
4214 int java_lang_StackTraceElement::fileName_offset;
4215 int java_lang_StackTraceElement::lineNumber_offset;
4216 int java_lang_StackTraceElement::moduleName_offset;
4217 int java_lang_StackTraceElement::moduleVersion_offset;
4218 int java_lang_StackTraceElement::classLoaderName_offset;
4219 int java_lang_StackTraceElement::declaringClass_offset;
4220 int java_lang_StackTraceElement::declaringClassObject_offset;
4221 int java_lang_StackFrameInfo::_memberName_offset;
4222 int java_lang_StackFrameInfo::_bci_offset;
4223 int java_lang_StackFrameInfo::_version_offset;
4224 int java_lang_LiveStackFrameInfo::_monitors_offset;
4225 int java_lang_LiveStackFrameInfo::_locals_offset;
4226 int java_lang_LiveStackFrameInfo::_operands_offset;
4227 int java_lang_LiveStackFrameInfo::_mode_offset;
4228 int java_lang_AssertionStatusDirectives::classes_offset;
4229 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4230 int java_lang_AssertionStatusDirectives::packages_offset;
4231 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4232 int java_lang_AssertionStatusDirectives::deflt_offset;
4233 int java_nio_Buffer::_limit_offset;
4234 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4235 int reflect_ConstantPool::_oop_offset;
4236 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4237 int java_lang_Integer_IntegerCache::_static_cache_offset;
4238 int java_lang_Long_LongCache::_static_cache_offset;
4239 int java_lang_Character_CharacterCache::_static_cache_offset;
4240 int java_lang_Short_ShortCache::_static_cache_offset;
4241 int java_lang_Byte_ByteCache::_static_cache_offset;
4242 int java_lang_Boolean::_static_TRUE_offset;
4243 int java_lang_Boolean::_static_FALSE_offset;
4244
4245
4246
4247 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4248 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4249 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4250 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4251 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4252 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4253 macro(methodName_offset, k, "methodName", string_signature, false); \
4254 macro(fileName_offset, k, "fileName", string_signature, false); \
4255 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4256
4257 // Support for java_lang_StackTraceElement
4258 void java_lang_StackTraceElement::compute_offsets() {
4259 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4260 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4261 }
4262
4263 #if INCLUDE_CDS
4264 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4265 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4266 }
4267 #endif
4268
4269 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4270 element->obj_field_put(fileName_offset, value);
4271 }
4272
4273 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4274 element->obj_field_put(declaringClass_offset, value);
4275 }
4276
4277 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4278 element->obj_field_put(methodName_offset, value);
4279 }
4280
4281 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4282 element->int_field_put(lineNumber_offset, value);
4283 }
4284
4285 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4286 element->obj_field_put(moduleName_offset, value);
4287 }
4288
4289 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4290 element->obj_field_put(moduleVersion_offset, value);
4291 }
4292
4293 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4294 element->obj_field_put(classLoaderName_offset, value);
4295 }
4296
4297 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4298 element->obj_field_put(declaringClassObject_offset, value);
4299 }
4300
4301 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4302 element->short_field_put(_version_offset, value);
4303 }
4304
4305 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4306 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
4307 element->int_field_put(_bci_offset, value);
4308 }
4309
4310 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4311 element->obj_field_put(_monitors_offset, value);
4312 }
4313
4314 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4315 element->obj_field_put(_locals_offset, value);
4316 }
4317
4318 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4319 element->obj_field_put(_operands_offset, value);
4320 }
4321
4322 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4323 element->int_field_put(_mode_offset, value);
4324 }
4325
4326 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4327 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4328 macro(classes_offset, k, "classes", string_array_signature, false); \
4329 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4330 macro(packages_offset, k, "packages", string_array_signature, false); \
4331 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4332 macro(deflt_offset, k, "deflt", bool_signature, false)
4333
4334 void java_lang_AssertionStatusDirectives::compute_offsets() {
4335 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4336 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4337 }
4338
4339 #if INCLUDE_CDS
4340 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4341 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4342 }
4343 #endif
4344
4345 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4346 o->obj_field_put(classes_offset, val);
4347 }
4348
4349 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4350 o->obj_field_put(classEnabled_offset, val);
4351 }
4352
4353 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4354 o->obj_field_put(packages_offset, val);
4355 }
4356
4357 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4358 o->obj_field_put(packageEnabled_offset, val);
4359 }
4360
4361 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4362 o->bool_field_put(deflt_offset, val);
4363 }
4364
4365
4366 // Support for intrinsification of java.nio.Buffer.checkIndex
4367 int java_nio_Buffer::limit_offset() {
4368 return _limit_offset;
4369 }
4370
4371 #define BUFFER_FIELDS_DO(macro) \
4372 macro(_limit_offset, k, "limit", int_signature, false)
4373
4374 void java_nio_Buffer::compute_offsets() {
4375 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4376 assert(k != NULL, "must be loaded in 1.4+");
4377 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4378 }
4379
4380 #if INCLUDE_CDS
4381 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4382 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4383 }
4384 #endif
4385
4386 #define AOS_FIELDS_DO(macro) \
4387 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4388
4389 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4390 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4391 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4392 }
4393
4394 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4395 assert(_owner_offset != 0, "Must be initialized");
4396 return obj->obj_field(_owner_offset);
4397 }
4398
4399 #if INCLUDE_CDS
4400 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4401 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4402 }
4403 #endif
4404
4405 #define INTEGER_CACHE_FIELDS_DO(macro) \
4406 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4407
4408 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4409 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4410 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4411 }
4412
4413 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4414 oop base = ik->static_field_base_raw();
4415 return objArrayOop(base->obj_field(_static_cache_offset));
4416 }
4417
4418 Symbol* java_lang_Integer_IntegerCache::symbol() {
4419 return vmSymbols::java_lang_Integer_IntegerCache();
4420 }
4421
4422 #if INCLUDE_CDS
4423 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
4424 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4425 }
4426 #endif
4427 #undef INTEGER_CACHE_FIELDS_DO
4428
4429 jint java_lang_Integer::value(oop obj) {
4430 jvalue v;
4431 java_lang_boxing_object::get_value(obj, &v);
4432 return v.i;
4433 }
4434
4435 #define LONG_CACHE_FIELDS_DO(macro) \
4436 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
4437
4438 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
4439 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4440 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4441 }
4442
4443 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
4444 oop base = ik->static_field_base_raw();
4445 return objArrayOop(base->obj_field(_static_cache_offset));
4446 }
4447
4448 Symbol* java_lang_Long_LongCache::symbol() {
4449 return vmSymbols::java_lang_Long_LongCache();
4450 }
4451
4452 #if INCLUDE_CDS
4453 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
4454 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4455 }
4456 #endif
4457 #undef LONG_CACHE_FIELDS_DO
4458
4459 jlong java_lang_Long::value(oop obj) {
4460 jvalue v;
4461 java_lang_boxing_object::get_value(obj, &v);
4462 return v.j;
4463 }
4464
4465 #define CHARACTER_CACHE_FIELDS_DO(macro) \
4466 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
4467
4468 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
4469 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4470 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4471 }
4472
4473 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
4474 oop base = ik->static_field_base_raw();
4475 return objArrayOop(base->obj_field(_static_cache_offset));
4476 }
4477
4478 Symbol* java_lang_Character_CharacterCache::symbol() {
4479 return vmSymbols::java_lang_Character_CharacterCache();
4480 }
4481
4482 #if INCLUDE_CDS
4483 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
4484 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4485 }
4486 #endif
4487 #undef CHARACTER_CACHE_FIELDS_DO
4488
4489 jchar java_lang_Character::value(oop obj) {
4490 jvalue v;
4491 java_lang_boxing_object::get_value(obj, &v);
4492 return v.c;
4493 }
4494
4495 #define SHORT_CACHE_FIELDS_DO(macro) \
4496 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
4497
4498 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
4499 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4500 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4501 }
4502
4503 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
4504 oop base = ik->static_field_base_raw();
4505 return objArrayOop(base->obj_field(_static_cache_offset));
4506 }
4507
4508 Symbol* java_lang_Short_ShortCache::symbol() {
4509 return vmSymbols::java_lang_Short_ShortCache();
4510 }
4511
4512 #if INCLUDE_CDS
4513 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
4514 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4515 }
4516 #endif
4517 #undef SHORT_CACHE_FIELDS_DO
4518
4519 jshort java_lang_Short::value(oop obj) {
4520 jvalue v;
4521 java_lang_boxing_object::get_value(obj, &v);
4522 return v.s;
4523 }
4524
4525 #define BYTE_CACHE_FIELDS_DO(macro) \
4526 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
4527
4528 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
4529 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4530 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4531 }
4532
4533 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
4534 oop base = ik->static_field_base_raw();
4535 return objArrayOop(base->obj_field(_static_cache_offset));
4536 }
4537
4538 Symbol* java_lang_Byte_ByteCache::symbol() {
4539 return vmSymbols::java_lang_Byte_ByteCache();
4540 }
4541
4542 #if INCLUDE_CDS
4543 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
4544 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4545 }
4546 #endif
4547 #undef BYTE_CACHE_FIELDS_DO
4548
4549 jbyte java_lang_Byte::value(oop obj) {
4550 jvalue v;
4551 java_lang_boxing_object::get_value(obj, &v);
4552 return v.b;
4553 }
4554 #define BOOLEAN_FIELDS_DO(macro) \
4555 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
4556 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
4557
4558
4559 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
4560 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4561 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4562 }
4563
4564 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
4565 oop base = ik->static_field_base_raw();
4566 return base->obj_field(_static_TRUE_offset);
4567 }
4568
4569 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
4570 oop base = ik->static_field_base_raw();
4571 return base->obj_field(_static_FALSE_offset);
4572 }
4573
4574 Symbol* java_lang_Boolean::symbol() {
4575 return vmSymbols::java_lang_Boolean();
4576 }
4577
4578 #if INCLUDE_CDS
4579 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
4580 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4581 }
4582 #endif
4583 #undef BOOLEAN_CACHE_FIELDS_DO
4584
4585 jboolean java_lang_Boolean::value(oop obj) {
4586 jvalue v;
4587 java_lang_boxing_object::get_value(obj, &v);
4588 return v.z;
4589 }
4590
4591 static int member_offset(int hardcoded_offset) {
4592 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4593 }
4594
4595 // Compute hard-coded offsets
4596 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4597 // are not available to determine the offset_of_static_fields.
4598 void JavaClasses::compute_hard_coded_offsets() {
4599
4600 // java_lang_boxing_object
4601 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4602 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4603
4604 // java_lang_ref_Reference
4605 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4606 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4607 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4608 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4609 }
4610
4611 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4612
4613 // Compute non-hard-coded field offsets of all the classes in this file
4614 void JavaClasses::compute_offsets() {
4615 if (UseSharedSpaces) {
4616 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4617 JvmtiExport::has_early_class_hook_env()),
4618 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4619 // None of the classes used by the rest of this function can be replaced by
4620 // JMVTI ClassFileLoadHook.
4621 // We are safe to use the archived offsets, which have already been restored
4622 // by JavaClasses::serialize_offsets, without computing the offsets again.
4623 return;
4624 }
4625
4626 // We have already called the compute_offsets() of the
4627 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4628 // earlier inside SystemDictionary::resolve_well_known_classes()
4629 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4630 }
4631
4632 #if INCLUDE_CDS
4633 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4634
4635 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4636 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4637 }
4638 #endif
4639
4640
4641 #ifndef PRODUCT
4642
4643 // These functions exist to assert the validity of hard-coded field offsets to guard
4644 // against changes in the class files
4645
4646 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4647 EXCEPTION_MARK;
4648 fieldDescriptor fd;
4649 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
4650 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4651 InstanceKlass* ik = InstanceKlass::cast(k);
4652 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
4653 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
4654 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4655 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4656 return false;
4657 }
4658 if (fd.is_static()) {
4659 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4660 return false;
4661 }
4662 if (fd.offset() == hardcoded_offset ) {
4663 return true;
4664 } else {
4665 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4666 klass_name, field_name, hardcoded_offset, fd.offset());
4667 return false;
4668 }
4669 }
4670
4671 // Check the hard-coded field offsets of all the classes in this file
4672
4673 void JavaClasses::check_offsets() {
4674 bool valid = true;
4675
4676 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4677 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4678
4679 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4680 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4681
4682 // Boxed primitive objects (java_lang_boxing_object)
4683
4684 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4685 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4686 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4687 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4688 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4689 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4690 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4691 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4692
4693 // java.lang.ref.Reference
4694
4695 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4696 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4697 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4698 // Fake field
4699 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4700
4701 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4702 }
4703
4704 #endif // PRODUCT
4705
4706 int InjectedField::compute_offset() {
4707 InstanceKlass* ik = InstanceKlass::cast(klass());
4708 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4709 if (!may_be_java && !fs.access_flags().is_internal()) {
4710 // Only look at injected fields
4711 continue;
4712 }
4713 if (fs.name() == name() && fs.signature() == signature()) {
4714 return fs.offset();
4715 }
4716 }
4717 ResourceMark rm;
4718 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)" : "");
4719 #ifndef PRODUCT
4720 ik->print();
4721 tty->print_cr("all fields:");
4722 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4723 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4724 }
4725 #endif //PRODUCT
4726 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4727 return -1;
4728 }
4729
4730 void javaClasses_init() {
4731 JavaClasses::compute_offsets();
4732 JavaClasses::check_offsets();
4733 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4734 }