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/vmSymbols.hpp"
32 #include "code/debugInfo.hpp"
33 #include "code/dependencyContext.hpp"
34 #include "code/pcDesc.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "logging/log.hpp"
38 #include "logging/logStream.hpp"
39 #include "memory/heapShared.inline.hpp"
40 #include "memory/metaspaceShared.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "memory/universe.hpp"
44 #include "oops/fieldStreams.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/instanceMirrorKlass.hpp"
47 #include "oops/klass.hpp"
48 #include "oops/method.inline.hpp"
49 #include "oops/objArrayOop.inline.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/symbol.hpp"
52 #include "oops/typeArrayOop.inline.hpp"
53 #include "prims/jvmtiExport.hpp"
54 #include "prims/resolvedMethodTable.hpp"
55 #include "runtime/fieldDescriptor.inline.hpp"
56 #include "runtime/frame.inline.hpp"
57 #include "runtime/handles.inline.hpp"
58 #include "runtime/interfaceSupport.inline.hpp"
59 #include "runtime/java.hpp"
60 #include "runtime/javaCalls.hpp"
61 #include "runtime/jniHandles.inline.hpp"
62 #include "runtime/safepoint.hpp"
63 #include "runtime/safepointVerifiers.hpp"
64 #include "runtime/thread.inline.hpp"
65 #include "runtime/vframe.inline.hpp"
66 #include "utilities/align.hpp"
67 #include "utilities/preserveException.hpp"
68 #include "utilities/utf8.hpp"
69 #if INCLUDE_JVMCI
70 #include "jvmci/jvmciJavaClasses.hpp"
71 #endif
72
73 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
74 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
75
76 #if INCLUDE_CDS
77 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
78 f->do_u4((u4*)&_##name##_offset);
79 #endif
80
81 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
82 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
83
84 InjectedField JavaClasses::_injected_fields[] = {
85 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
86 };
87
88 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
89 return _injected_fields[id].compute_offset();
90 }
91
92 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
93 *field_count = 0;
94
95 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
96 if (sid == vmSymbols::NO_SID) {
97 // Only well known classes can inject fields
98 return NULL;
99 }
100
101 int count = 0;
102 int start = -1;
103
104 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
105 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
106 count++; \
107 if (start == -1) start = klass##_##name##_enum; \
108 }
109 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
110 #undef LOOKUP_INJECTED_FIELD
111
112 if (start != -1) {
113 *field_count = count;
114 return _injected_fields + start;
115 }
116 return NULL;
117 }
118
119
120 // Helpful routine for computing field offsets at run time rather than hardcoding them
121 // Finds local fields only, including static fields. Static field offsets are from the
122 // beginning of the mirror.
123 static void compute_offset(int &dest_offset,
124 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
125 bool is_static = false) {
126 fieldDescriptor fd;
127 if (ik == NULL) {
128 ResourceMark rm;
129 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
130 vm_exit_during_initialization("Invalid layout of well-known class");
131 }
132
133 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
134 ResourceMark rm;
135 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
136 name_symbol->as_C_string(), signature_symbol->as_C_string());
137 #ifndef PRODUCT
138 // Prints all fields and offsets
139 Log(class) lt;
140 LogStream ls(lt.error());
141 ik->print_on(&ls);
142 #endif //PRODUCT
143 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
144 }
145 dest_offset = fd.offset();
146 }
147
148 // Overloading to pass name as a string.
149 static void compute_offset(int& dest_offset, InstanceKlass* ik,
150 const char* name_string, Symbol* signature_symbol,
151 bool is_static = false) {
152 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
153 if (name == NULL) {
154 ResourceMark rm;
155 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
156 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
157 }
158 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
159 }
160
161 int java_lang_String::value_offset = 0;
162 int java_lang_String::hash_offset = 0;
163 int java_lang_String::hashIsZero_offset = 0;
164 int java_lang_String::coder_offset = 0;
165
166 bool java_lang_String::initialized = false;
167
168 bool java_lang_String::is_instance(oop obj) {
169 return is_instance_inlined(obj);
170 }
171
172 #if INCLUDE_CDS
173 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
174 f->do_u4((u4*)&offset)
175 #endif
176
177 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
178 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
179
180 #define STRING_FIELDS_DO(macro) \
181 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
182 macro(hash_offset, k, "hash", int_signature, false); \
183 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
184 macro(coder_offset, k, "coder", byte_signature, false);
185
186 void java_lang_String::compute_offsets() {
187 if (initialized) {
188 return;
189 }
190
191 InstanceKlass* k = SystemDictionary::String_klass();
192 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
193
194 initialized = true;
195 }
196
197 #if INCLUDE_CDS
198 void java_lang_String::serialize_offsets(SerializeClosure* f) {
199 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
200 f->do_u4((u4*)&initialized);
201 }
202 #endif
203
204 class CompactStringsFixup : public FieldClosure {
205 private:
206 bool _value;
207
208 public:
209 CompactStringsFixup(bool value) : _value(value) {}
210
211 void do_field(fieldDescriptor* fd) {
212 if (fd->name() == vmSymbols::compact_strings_name()) {
213 oop mirror = fd->field_holder()->java_mirror();
214 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
215 assert(mirror != NULL, "String must have mirror already");
216 mirror->bool_field_put(fd->offset(), _value);
217 }
218 }
219 };
220
221 void java_lang_String::set_compact_strings(bool value) {
222 CompactStringsFixup fix(value);
223 SystemDictionary::String_klass()->do_local_static_fields(&fix);
224 }
225
226 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
227 assert(initialized, "Must be initialized");
228 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
229
230 // Create the String object first, so there's a chance that the String
231 // and the char array it points to end up in the same cache line.
232 oop obj;
233 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
234
235 // Create the char array. The String object must be handlized here
236 // because GC can happen as a result of the allocation attempt.
237 Handle h_obj(THREAD, obj);
238 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
239 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
240
241 // Point the String at the char array
242 obj = h_obj();
243 set_value(obj, buffer);
244 // No need to zero the offset, allocation zero'ed the entire String object
245 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
246 return h_obj;
247 }
248
249 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
250 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
251 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
252 typeArrayOop buffer = value(h_obj());
253 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
254 if (is_latin1) {
255 for (int index = 0; index < length; index++) {
256 buffer->byte_at_put(index, (jbyte)unicode[index]);
257 }
258 } else {
259 for (int index = 0; index < length; index++) {
260 buffer->char_at_put(index, unicode[index]);
261 }
262 }
263
264 #ifdef ASSERT
265 {
266 ResourceMark rm;
267 char* expected = UNICODE::as_utf8(unicode, length);
268 char* actual = as_utf8_string(h_obj());
269 if (strcmp(expected, actual) != 0) {
270 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
271 ShouldNotReachHere();
272 }
273 }
274 #endif
275
276 return h_obj;
277 }
278
279 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
280 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
281 return h_obj();
282 }
283
284 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
285 if (utf8_str == NULL) {
286 return Handle();
287 }
288 bool has_multibyte, is_latin1;
289 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
290 if (!CompactStrings) {
291 has_multibyte = true;
292 is_latin1 = false;
293 }
294
295 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
296 if (length > 0) {
297 if (!has_multibyte) {
298 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
299 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
300 } else if (is_latin1) {
301 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
302 } else {
303 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
304 }
305 }
306
307 #ifdef ASSERT
308 // This check is too strict because the input string is not necessarily valid UTF8.
309 // For example, it may be created with arbitrary content via jni_NewStringUTF.
310 /*
311 {
312 ResourceMark rm;
313 const char* expected = utf8_str;
314 char* actual = as_utf8_string(h_obj());
315 if (strcmp(expected, actual) != 0) {
316 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
317 ShouldNotReachHere();
318 }
319 }
320 */
321 #endif
322
323 return h_obj;
324 }
325
326 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
327 Handle h_obj = create_from_str(utf8_str, CHECK_0);
328 return h_obj();
329 }
330
331 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
332 const char* utf8_str = (char*)symbol->bytes();
333 int utf8_len = symbol->utf8_length();
334
335 bool has_multibyte, is_latin1;
336 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
337 if (!CompactStrings) {
338 has_multibyte = true;
339 is_latin1 = false;
340 }
341
342 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
343 if (length > 0) {
344 if (!has_multibyte) {
345 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
346 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
347 } else if (is_latin1) {
348 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
349 } else {
350 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
351 }
352 }
353
354 #ifdef ASSERT
355 {
356 ResourceMark rm;
357 const char* expected = symbol->as_utf8();
358 char* actual = as_utf8_string(h_obj());
359 if (strncmp(expected, actual, utf8_len) != 0) {
360 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
361 ShouldNotReachHere();
362 }
363 }
364 #endif
365
366 return h_obj;
367 }
368
369 // Converts a C string to a Java String based on current encoding
370 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
371 assert(str != NULL, "bad arguments");
372
373 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
374 static to_java_string_fn_t _to_java_string_fn = NULL;
375
376 if (_to_java_string_fn == NULL) {
377 void *lib_handle = os::native_java_library();
378 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
379 if (_to_java_string_fn == NULL) {
380 fatal("NewStringPlatform missing");
381 }
382 }
383
384 jstring js = NULL;
385 { JavaThread* thread = (JavaThread*)THREAD;
386 assert(thread->is_Java_thread(), "must be java thread");
387 HandleMark hm(thread);
388 ThreadToNativeFromVM ttn(thread);
389 js = (_to_java_string_fn)(thread->jni_environment(), str);
390 }
391 return Handle(THREAD, JNIHandles::resolve(js));
392 }
393
394 // Converts a Java String to a native C string that can be used for
395 // native OS calls.
396 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
397 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
398 static to_platform_string_fn_t _to_platform_string_fn = NULL;
399
400 if (_to_platform_string_fn == NULL) {
401 void *lib_handle = os::native_java_library();
402 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
403 if (_to_platform_string_fn == NULL) {
404 fatal("GetStringPlatformChars missing");
405 }
406 }
407
408 char *native_platform_string;
409 { JavaThread* thread = (JavaThread*)THREAD;
410 assert(thread->is_Java_thread(), "must be java thread");
411 JNIEnv *env = thread->jni_environment();
412 jstring js = (jstring) JNIHandles::make_local(env, java_string());
413 bool is_copy;
414 HandleMark hm(thread);
415 ThreadToNativeFromVM ttn(thread);
416 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
417 assert(is_copy == JNI_TRUE, "is_copy value changed");
418 JNIHandles::destroy_local(js);
419 }
420 return native_platform_string;
421 }
422
423 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
424 oop obj = java_string();
425 // Typical usage is to convert all '/' to '.' in string.
426 typeArrayOop value = java_lang_String::value(obj);
427 int length = java_lang_String::length(obj, value);
428 bool is_latin1 = java_lang_String::is_latin1(obj);
429
430 // First check if any from_char exist
431 int index; // Declared outside, used later
432 for (index = 0; index < length; index++) {
433 jchar c = !is_latin1 ? value->char_at(index) :
434 ((jchar) value->byte_at(index)) & 0xff;
435 if (c == from_char) {
436 break;
437 }
438 }
439 if (index == length) {
440 // No from_char, so do not copy.
441 return java_string;
442 }
443
444 // Check if result string will be latin1
445 bool to_is_latin1 = false;
446
447 // Replacement char must be latin1
448 if (CompactStrings && UNICODE::is_latin1(to_char)) {
449 if (is_latin1) {
450 // Source string is latin1 as well
451 to_is_latin1 = true;
452 } else if (!UNICODE::is_latin1(from_char)) {
453 // We are replacing an UTF16 char. Scan string to
454 // check if result can be latin1 encoded.
455 to_is_latin1 = true;
456 for (index = 0; index < length; index++) {
457 jchar c = value->char_at(index);
458 if (c != from_char && !UNICODE::is_latin1(c)) {
459 to_is_latin1 = false;
460 break;
461 }
462 }
463 }
464 }
465
466 // Create new UNICODE (or byte) buffer. Must handlize value because GC
467 // may happen during String and char array creation.
468 typeArrayHandle h_value(THREAD, value);
469 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
470 typeArrayOop from_buffer = h_value();
471 typeArrayOop to_buffer = java_lang_String::value(string());
472
473 // Copy contents
474 for (index = 0; index < length; index++) {
475 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
476 ((jchar) from_buffer->byte_at(index)) & 0xff;
477 if (c == from_char) {
478 c = to_char;
479 }
480 if (!to_is_latin1) {
481 to_buffer->char_at_put(index, c);
482 } else {
483 to_buffer->byte_at_put(index, (jbyte) c);
484 }
485 }
486 return string;
487 }
488
489 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
490 typeArrayOop value = java_lang_String::value(java_string);
491 length = java_lang_String::length(java_string, value);
492 bool is_latin1 = java_lang_String::is_latin1(java_string);
493
494 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
495 if (result != NULL) {
496 if (!is_latin1) {
497 for (int index = 0; index < length; index++) {
498 result[index] = value->char_at(index);
499 }
500 } else {
501 for (int index = 0; index < length; index++) {
502 result[index] = ((jchar) value->byte_at(index)) & 0xff;
503 }
504 }
505 } else {
506 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
507 }
508 return result;
509 }
510
511 unsigned int java_lang_String::hash_code(oop java_string) {
512 // The hash and hashIsZero fields are subject to a benign data race,
513 // making it crucial to ensure that any observable result of the
514 // calculation in this method stays correct under any possible read of
515 // these fields. Necessary restrictions to allow this to be correct
516 // without explicit memory fences or similar concurrency primitives is
517 // that we can ever only write to one of these two fields for a given
518 // String instance, and that the computation is idempotent and derived
519 // from immutable state
520 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized");
521 if (java_lang_String::hash_is_set(java_string)) {
522 return java_string->int_field(hash_offset);
523 }
524
525 typeArrayOop value = java_lang_String::value(java_string);
526 int length = java_lang_String::length(java_string, value);
527 bool is_latin1 = java_lang_String::is_latin1(java_string);
528
529 unsigned int hash = 0;
530 if (length > 0) {
531 if (is_latin1) {
532 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
533 } else {
534 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
535 }
536 }
537
538 if (hash != 0) {
539 java_string->int_field_put(hash_offset, hash);
540 } else {
541 java_string->bool_field_put(hashIsZero_offset, true);
542 }
543 return hash;
544 }
545
546 char* java_lang_String::as_quoted_ascii(oop java_string) {
547 typeArrayOop value = java_lang_String::value(java_string);
548 int length = java_lang_String::length(java_string, value);
549 bool is_latin1 = java_lang_String::is_latin1(java_string);
550
551 if (length == 0) return NULL;
552
553 char* result;
554 int result_length;
555 if (!is_latin1) {
556 jchar* base = value->char_at_addr(0);
557 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
558 result = NEW_RESOURCE_ARRAY(char, result_length);
559 UNICODE::as_quoted_ascii(base, length, result, result_length);
560 } else {
561 jbyte* base = value->byte_at_addr(0);
562 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
563 result = NEW_RESOURCE_ARRAY(char, result_length);
564 UNICODE::as_quoted_ascii(base, length, result, result_length);
565 }
566 assert(result_length >= length + 1, "must not be shorter");
567 assert(result_length == (int)strlen(result) + 1, "must match");
568 return result;
569 }
570
571 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
572 typeArrayOop value = java_lang_String::value(java_string);
573 int length = java_lang_String::length(java_string, value);
574 bool is_latin1 = java_lang_String::is_latin1(java_string);
575 if (!is_latin1) {
576 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
577 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
578 return sym;
579 } else {
580 ResourceMark rm;
581 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
582 const char* base = UNICODE::as_utf8(position, length);
583 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
584 return sym;
585 }
586 }
587
588 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
589 typeArrayOop value = java_lang_String::value(java_string);
590 int length = java_lang_String::length(java_string, value);
591 bool is_latin1 = java_lang_String::is_latin1(java_string);
592 if (!is_latin1) {
593 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
594 return SymbolTable::probe_unicode(base, length);
595 } else {
596 ResourceMark rm;
597 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
598 const char* base = UNICODE::as_utf8(position, length);
599 return SymbolTable::probe(base, length);
600 }
601 }
602
603 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
604 assert(value_equals(value, java_lang_String::value(java_string)),
605 "value must be same as java_lang_String::value(java_string)");
606 int length = java_lang_String::length(java_string, value);
607 if (length == 0) {
608 return 0;
609 }
610 if (!java_lang_String::is_latin1(java_string)) {
611 return UNICODE::utf8_length(value->char_at_addr(0), length);
612 } else {
613 return UNICODE::utf8_length(value->byte_at_addr(0), length);
614 }
615 }
616
617 int java_lang_String::utf8_length(oop java_string) {
618 typeArrayOop value = java_lang_String::value(java_string);
619 return utf8_length(java_string, value);
620 }
621
622 char* java_lang_String::as_utf8_string(oop java_string) {
623 typeArrayOop value = java_lang_String::value(java_string);
624 int length = java_lang_String::length(java_string, value);
625 bool is_latin1 = java_lang_String::is_latin1(java_string);
626 if (!is_latin1) {
627 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
628 return UNICODE::as_utf8(position, length);
629 } else {
630 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
631 return UNICODE::as_utf8(position, length);
632 }
633 }
634
635 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
636 assert(value_equals(value, java_lang_String::value(java_string)),
637 "value must be same as java_lang_String::value(java_string)");
638 int length = java_lang_String::length(java_string, value);
639 bool is_latin1 = java_lang_String::is_latin1(java_string);
640 if (!is_latin1) {
641 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
642 return UNICODE::as_utf8(position, length, buf, buflen);
643 } else {
644 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
645 return UNICODE::as_utf8(position, length, buf, buflen);
646 }
647 }
648
649 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
650 typeArrayOop value = java_lang_String::value(java_string);
651 return as_utf8_string(java_string, value, buf, buflen);
652 }
653
654 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
655 typeArrayOop value = java_lang_String::value(java_string);
656 bool is_latin1 = java_lang_String::is_latin1(java_string);
657 assert(start + len <= java_lang_String::length(java_string), "just checking");
658 if (!is_latin1) {
659 jchar* position = value->char_at_addr(start);
660 return UNICODE::as_utf8(position, len);
661 } else {
662 jbyte* position = value->byte_at_addr(start);
663 return UNICODE::as_utf8(position, len);
664 }
665 }
666
667 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
668 assert(value_equals(value, java_lang_String::value(java_string)),
669 "value must be same as java_lang_String::value(java_string)");
670 assert(start + len <= java_lang_String::length(java_string), "just checking");
671 bool is_latin1 = java_lang_String::is_latin1(java_string);
672 if (!is_latin1) {
673 jchar* position = value->char_at_addr(start);
674 return UNICODE::as_utf8(position, len, buf, buflen);
675 } else {
676 jbyte* position = value->byte_at_addr(start);
677 return UNICODE::as_utf8(position, len, buf, buflen);
678 }
679 }
680
681 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
682 assert(java_string->klass() == SystemDictionary::String_klass(),
683 "must be java_string");
684 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
685 int length = java_lang_String::length(java_string, value);
686 if (length != len) {
687 return false;
688 }
689 bool is_latin1 = java_lang_String::is_latin1(java_string);
690 if (!is_latin1) {
691 for (int i = 0; i < len; i++) {
692 if (value->char_at(i) != chars[i]) {
693 return false;
694 }
695 }
696 } else {
697 for (int i = 0; i < len; i++) {
698 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
699 return false;
700 }
701 }
702 }
703 return true;
704 }
705
706 bool java_lang_String::equals(oop str1, oop str2) {
707 assert(str1->klass() == SystemDictionary::String_klass(),
708 "must be java String");
709 assert(str2->klass() == SystemDictionary::String_klass(),
710 "must be java String");
711 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
712 bool is_latin1 = java_lang_String::is_latin1(str1);
713 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
714 bool is_latin2 = java_lang_String::is_latin1(str2);
715
716 if (is_latin1 != is_latin2) {
717 // Strings with different coders are never equal.
718 return false;
719 }
720 return value_equals(value1, value2);
721 }
722
723 void java_lang_String::print(oop java_string, outputStream* st) {
724 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
725 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
726
727 if (value == NULL) {
728 // This can happen if, e.g., printing a String
729 // object before its initializer has been called
730 st->print("NULL");
731 return;
732 }
733
734 int length = java_lang_String::length(java_string, value);
735 bool is_latin1 = java_lang_String::is_latin1(java_string);
736
737 st->print("\"");
738 for (int index = 0; index < length; index++) {
739 st->print("%c", (!is_latin1) ? value->char_at(index) :
740 ((jchar) value->byte_at(index)) & 0xff );
741 }
742 st->print("\"");
743 }
744
745
746 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
747 assert(mirror.not_null() && fd->is_static(), "just checking");
748 if (fd->has_initial_value()) {
749 BasicType t = fd->field_type();
750 switch (t) {
751 case T_BYTE:
752 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
753 break;
754 case T_BOOLEAN:
755 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
756 break;
757 case T_CHAR:
758 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
759 break;
760 case T_SHORT:
761 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
762 break;
763 case T_INT:
764 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
765 break;
766 case T_FLOAT:
767 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
768 break;
769 case T_DOUBLE:
770 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
771 break;
772 case T_LONG:
773 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
774 break;
775 case T_OBJECT:
776 {
777 assert(fd->signature() == vmSymbols::string_signature(),
778 "just checking");
779 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
780 // Archive the String field and update the pointer.
781 oop s = mirror()->obj_field(fd->offset());
782 oop archived_s = StringTable::create_archived_string(s, CHECK);
783 mirror()->obj_field_put(fd->offset(), archived_s);
784 } else {
785 oop string = fd->string_initial_value(CHECK);
786 mirror()->obj_field_put(fd->offset(), string);
787 }
788 }
789 break;
790 default:
791 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
792 "Illegal ConstantValue attribute in class file");
793 }
794 }
795 }
796
797
798 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
799 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
800
801 // If the offset was read from the shared archive, it was fixed up already
802 if (!k->is_shared()) {
803 if (k->is_instance_klass()) {
804 // During bootstrap, java.lang.Class wasn't loaded so static field
805 // offsets were computed without the size added it. Go back and
806 // update all the static field offsets to included the size.
807 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
808 if (fs.access_flags().is_static()) {
809 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
810 fs.set_offset(real_offset);
811 }
812 }
813 }
814 }
815
816 if (k->is_shared() && k->has_raw_archived_mirror()) {
817 if (HeapShared::open_archive_heap_region_mapped()) {
818 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
819 assert(present, "Missing archived mirror for %s", k->external_name());
820 return;
821 } else {
822 k->set_java_mirror_handle(NULL);
823 k->clear_has_raw_archived_mirror();
824 }
825 }
826 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
827 }
828
829 void java_lang_Class::initialize_mirror_fields(Klass* k,
830 Handle mirror,
831 Handle protection_domain,
832 TRAPS) {
833 // Allocate a simple java object for a lock.
834 // This needs to be a java object because during class initialization
835 // it can be held across a java call.
836 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
837 set_init_lock(mirror(), r);
838
839 // Set protection domain also
840 set_protection_domain(mirror(), protection_domain());
841
842 // Initialize static fields
843 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
844 }
845
846 // Set the java.lang.Module module field in the java_lang_Class mirror
847 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
848 if (module.is_null()) {
849 // During startup, the module may be NULL only if java.base has not been defined yet.
850 // Put the class on the fixup_module_list to patch later when the java.lang.Module
851 // for java.base is known. But note that since we captured the NULL module another
852 // thread may have completed that initialization.
853
854 bool javabase_was_defined = false;
855 {
856 MutexLocker m1(Module_lock, THREAD);
857 // Keep list of classes needing java.base module fixup
858 if (!ModuleEntryTable::javabase_defined()) {
859 assert(k->java_mirror() != NULL, "Class's mirror is null");
860 k->class_loader_data()->inc_keep_alive();
861 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
862 fixup_module_field_list()->push(k);
863 } else {
864 javabase_was_defined = true;
865 }
866 }
867
868 // If java.base was already defined then patch this particular class with java.base.
869 if (javabase_was_defined) {
870 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
871 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
872 "Setting class module field, " JAVA_BASE_NAME " should be defined");
873 Handle javabase_handle(THREAD, javabase_entry->module());
874 set_module(mirror(), javabase_handle());
875 }
876 } else {
877 assert(Universe::is_module_initialized() ||
878 (ModuleEntryTable::javabase_defined() &&
879 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
880 "Incorrect java.lang.Module specification while creating mirror");
881 set_module(mirror(), module());
882 }
883 }
884
885 // Statically allocate fixup lists because they always get created.
886 void java_lang_Class::allocate_fixup_lists() {
887 GrowableArray<Klass*>* mirror_list =
888 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
889 set_fixup_mirror_list(mirror_list);
890
891 GrowableArray<Klass*>* module_list =
892 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
893 set_fixup_module_field_list(module_list);
894 }
895
896 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
897 Handle module, Handle protection_domain, TRAPS) {
898 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
899 assert(k->java_mirror() == NULL, "should only assign mirror once");
900
901 // Use this moment of initialization to cache modifier_flags also,
902 // to support Class.getModifiers(). Instance classes recalculate
903 // the cached flags after the class file is parsed, but before the
904 // class is put into the system dictionary.
905 int computed_modifiers = k->compute_modifier_flags(CHECK);
906 k->set_modifier_flags(computed_modifiers);
907 // Class_klass has to be loaded because it is used to allocate
908 // the mirror.
909 if (SystemDictionary::Class_klass_loaded()) {
910 // Allocate mirror (java.lang.Class instance)
911 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
912 Handle mirror(THREAD, mirror_oop);
913 Handle comp_mirror;
914
915 // Setup indirection from mirror->klass
916 java_lang_Class::set_klass(mirror(), k);
917
918 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
919 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
920
921 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
922
923 // It might also have a component mirror. This mirror must already exist.
924 if (k->is_array_klass()) {
925 if (k->is_typeArray_klass()) {
926 BasicType type = TypeArrayKlass::cast(k)->element_type();
927 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
928 } else {
929 assert(k->is_objArray_klass(), "Must be");
930 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
931 assert(element_klass != NULL, "Must have an element klass");
932 comp_mirror = Handle(THREAD, element_klass->java_mirror());
933 }
934 assert(comp_mirror() != NULL, "must have a mirror");
935
936 // Two-way link between the array klass and its component mirror:
937 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
938 set_component_mirror(mirror(), comp_mirror());
939 // See below for ordering dependencies between field array_klass in component mirror
940 // and java_mirror in this klass.
941 } else {
942 assert(k->is_instance_klass(), "Must be");
943
944 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
945 if (HAS_PENDING_EXCEPTION) {
946 // If any of the fields throws an exception like OOM remove the klass field
947 // from the mirror so GC doesn't follow it after the klass has been deallocated.
948 // This mirror looks like a primitive type, which logically it is because it
949 // it represents no class.
950 java_lang_Class::set_klass(mirror(), NULL);
951 return;
952 }
953 }
954
955 // set the classLoader field in the java_lang_Class instance
956 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
957 set_class_loader(mirror(), class_loader());
958
959 // Setup indirection from klass->mirror
960 // after any exceptions can happen during allocations.
961 k->set_java_mirror(mirror);
962
963 // Set the module field in the java_lang_Class instance. This must be done
964 // after the mirror is set.
965 set_mirror_module_field(k, mirror, module, THREAD);
966
967 if (comp_mirror() != NULL) {
968 // Set after k->java_mirror() is published, because compiled code running
969 // concurrently doesn't expect a k to have a null java_mirror.
970 release_set_array_klass(comp_mirror(), k);
971 }
972 } else {
973 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
974 fixup_mirror_list()->push(k);
975 }
976 }
977
978 #if INCLUDE_CDS_JAVA_HEAP
979 // Clears mirror fields. Static final fields with initial values are reloaded
980 // from constant pool. The object identity hash is in the object header and is
981 // not affected.
982 class ResetMirrorField: public FieldClosure {
983 private:
984 Handle _m;
985
986 public:
987 ResetMirrorField(Handle mirror) : _m(mirror) {}
988
989 void do_field(fieldDescriptor* fd) {
990 assert(DumpSharedSpaces, "dump time only");
991 assert(_m.not_null(), "Mirror cannot be NULL");
992
993 if (fd->is_static() && fd->has_initial_value()) {
994 initialize_static_field(fd, _m, Thread::current());
995 return;
996 }
997
998 BasicType ft = fd->field_type();
999 switch (ft) {
1000 case T_BYTE:
1001 _m()->byte_field_put(fd->offset(), 0);
1002 break;
1003 case T_CHAR:
1004 _m()->char_field_put(fd->offset(), 0);
1005 break;
1006 case T_DOUBLE:
1007 _m()->double_field_put(fd->offset(), 0);
1008 break;
1009 case T_FLOAT:
1010 _m()->float_field_put(fd->offset(), 0);
1011 break;
1012 case T_INT:
1013 _m()->int_field_put(fd->offset(), 0);
1014 break;
1015 case T_LONG:
1016 _m()->long_field_put(fd->offset(), 0);
1017 break;
1018 case T_SHORT:
1019 _m()->short_field_put(fd->offset(), 0);
1020 break;
1021 case T_BOOLEAN:
1022 _m()->bool_field_put(fd->offset(), false);
1023 break;
1024 case T_ARRAY:
1025 case T_OBJECT: {
1026 // It might be useful to cache the String field, but
1027 // for now just clear out any reference field
1028 oop o = _m()->obj_field(fd->offset());
1029 _m()->obj_field_put(fd->offset(), NULL);
1030 break;
1031 }
1032 default:
1033 ShouldNotReachHere();
1034 break;
1035 }
1036 }
1037 };
1038
1039 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1040 assert(HeapShared::is_heap_object_archiving_allowed(),
1041 "HeapShared::is_heap_object_archiving_allowed() must be true");
1042
1043 for (int t = 0; t <= T_VOID; t++) {
1044 oop m = Universe::_mirrors[t];
1045 if (m != NULL) {
1046 // Update the field at _array_klass_offset to point to the relocated array klass.
1047 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1048 assert(archived_m != NULL, "sanity");
1049 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1050 assert(ak != NULL || t == T_VOID, "should not be NULL");
1051 if (ak != NULL) {
1052 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1053 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1054 }
1055
1056 // Clear the fields. Just to be safe
1057 Klass *k = m->klass();
1058 Handle archived_mirror_h(THREAD, archived_m);
1059 ResetMirrorField reset(archived_mirror_h);
1060 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1061
1062 log_trace(cds, heap, mirror)(
1063 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1064 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1065
1066 Universe::_mirrors[t] = archived_m;
1067 }
1068 }
1069
1070 assert(Universe::_mirrors[T_INT] != NULL &&
1071 Universe::_mirrors[T_FLOAT] != NULL &&
1072 Universe::_mirrors[T_DOUBLE] != NULL &&
1073 Universe::_mirrors[T_BYTE] != NULL &&
1074 Universe::_mirrors[T_BOOLEAN] != NULL &&
1075 Universe::_mirrors[T_CHAR] != NULL &&
1076 Universe::_mirrors[T_LONG] != NULL &&
1077 Universe::_mirrors[T_SHORT] != NULL &&
1078 Universe::_mirrors[T_VOID] != NULL, "sanity");
1079
1080 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1081 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1082 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1083 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1084 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1085 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1086 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1087 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1088 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1089 }
1090
1091 //
1092 // After the mirror object is successfully archived, the archived
1093 // klass is set with _has_archived_raw_mirror flag.
1094 //
1095 // The _has_archived_raw_mirror flag is cleared at runtime when the
1096 // archived mirror is restored. If archived java heap data cannot
1097 // be used at runtime, new mirror object is created for the shared
1098 // class. The _has_archived_raw_mirror is cleared also during the process.
1099 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1100 assert(HeapShared::is_heap_object_archiving_allowed(),
1101 "HeapShared::is_heap_object_archiving_allowed() must be true");
1102
1103 // Mirror is already archived
1104 if (k->has_raw_archived_mirror()) {
1105 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1106 return k->archived_java_mirror_raw();
1107 }
1108
1109 // No mirror
1110 oop mirror = k->java_mirror();
1111 if (mirror == NULL) {
1112 return NULL;
1113 }
1114
1115 if (k->is_instance_klass()) {
1116 InstanceKlass *ik = InstanceKlass::cast(k);
1117 assert(ik->signers() == NULL, "class with signer should have been excluded");
1118
1119 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1120 ik->is_shared_app_class())) {
1121 // Archiving mirror for classes from non-builtin loaders is not
1122 // supported. Clear the _java_mirror within the archived class.
1123 k->set_java_mirror_handle(NULL);
1124 return NULL;
1125 }
1126 }
1127
1128 // Now start archiving the mirror object
1129 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1130 if (archived_mirror == NULL) {
1131 return NULL;
1132 }
1133
1134 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1135 if (archived_mirror == NULL) {
1136 return NULL;
1137 }
1138
1139 k->set_archived_java_mirror_raw(archived_mirror);
1140
1141 k->set_has_raw_archived_mirror();
1142
1143 ResourceMark rm;
1144 log_trace(cds, heap, mirror)(
1145 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1146 k->external_name(), p2i(mirror), p2i(archived_mirror));
1147
1148 return archived_mirror;
1149 }
1150
1151 // The process is based on create_mirror().
1152 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1153 oop archived_mirror,
1154 Thread *THREAD) {
1155 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1156 // to archived metadata and objects below.
1157 Klass *c = archived_mirror->klass();
1158 Handle archived_mirror_h(THREAD, archived_mirror);
1159 ResetMirrorField reset(archived_mirror_h);
1160 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1161
1162 if (k->is_array_klass()) {
1163 oop archived_comp_mirror;
1164 if (k->is_typeArray_klass()) {
1165 // The primitive type mirrors are already archived. Get the archived mirror.
1166 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1167 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1168 assert(archived_comp_mirror != NULL, "Must be");
1169 } else {
1170 assert(k->is_objArray_klass(), "Must be");
1171 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1172 assert(element_klass != NULL, "Must have an element klass");
1173 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1174 if (archived_comp_mirror == NULL) {
1175 return NULL;
1176 }
1177 }
1178 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1179 } else {
1180 assert(k->is_instance_klass(), "Must be");
1181
1182 // Reset local static fields in the mirror
1183 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1184
1185 java_lang_Class:set_init_lock(archived_mirror, NULL);
1186
1187 set_protection_domain(archived_mirror, NULL);
1188 }
1189
1190 // clear class loader and mirror_module_field
1191 set_class_loader(archived_mirror, NULL);
1192 set_module(archived_mirror, NULL);
1193
1194 // The archived mirror's field at _klass_offset is still pointing to the original
1195 // klass. Updated the field in the archived mirror to point to the relocated
1196 // klass in the archive.
1197 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1198 log_debug(cds, heap, mirror)(
1199 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1200 p2i(as_Klass(mirror)), p2i(reloc_k));
1201 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1202
1203 // The field at _array_klass_offset is pointing to the original one dimension
1204 // higher array klass if exists. Relocate the pointer.
1205 Klass *arr = array_klass_acquire(mirror);
1206 if (arr != NULL) {
1207 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1208 log_debug(cds, heap, mirror)(
1209 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1210 p2i(arr), p2i(reloc_arr));
1211 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1212 }
1213 return archived_mirror;
1214 }
1215
1216 // Returns true if the mirror is updated, false if no archived mirror
1217 // data is present. After the archived mirror object is restored, the
1218 // shared klass' _has_raw_archived_mirror flag is cleared.
1219 bool java_lang_Class::restore_archived_mirror(Klass *k,
1220 Handle class_loader, Handle module,
1221 Handle protection_domain, TRAPS) {
1222 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1223 // see more details in SystemDictionary::resolve_well_known_classes().
1224 if (!SystemDictionary::Class_klass_loaded()) {
1225 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1226 fixup_mirror_list()->push(k);
1227 return true;
1228 }
1229
1230 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1231
1232 if (m == NULL) {
1233 return false;
1234 }
1235
1236 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1237
1238 // mirror is archived, restore
1239 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1240 Handle mirror(THREAD, m);
1241
1242 if (!k->is_array_klass()) {
1243 // - local static final fields with initial values were initialized at dump time
1244
1245 // create the init_lock
1246 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1247 set_init_lock(mirror(), r);
1248
1249 if (protection_domain.not_null()) {
1250 set_protection_domain(mirror(), protection_domain());
1251 }
1252 }
1253
1254 assert(class_loader() == k->class_loader(), "should be same");
1255 if (class_loader.not_null()) {
1256 set_class_loader(mirror(), class_loader());
1257 }
1258
1259 k->set_java_mirror(mirror);
1260 k->clear_has_raw_archived_mirror();
1261
1262 set_mirror_module_field(k, mirror, module, THREAD);
1263
1264 ResourceMark rm;
1265 log_trace(cds, heap, mirror)(
1266 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1267
1268 return true;
1269 }
1270 #endif // INCLUDE_CDS_JAVA_HEAP
1271
1272 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1273 assert(_module_offset != 0, "must have been computed already");
1274 java_lang_Class::set_module(k->java_mirror(), module());
1275 }
1276
1277 int java_lang_Class::oop_size(oop java_class) {
1278 assert(_oop_size_offset != 0, "must be set");
1279 int size = java_class->int_field(_oop_size_offset);
1280 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1281 return size;
1282 }
1283
1284
1285 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1286 assert(_oop_size_offset != 0, "must be set");
1287 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1288 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1289 }
1290
1291 int java_lang_Class::static_oop_field_count(oop java_class) {
1292 assert(_static_oop_field_count_offset != 0, "must be set");
1293 return java_class->int_field(_static_oop_field_count_offset);
1294 }
1295
1296 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1297 assert(_static_oop_field_count_offset != 0, "must be set");
1298 return java_class->int_field_raw(_static_oop_field_count_offset);
1299 }
1300
1301 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1302 assert(_static_oop_field_count_offset != 0, "must be set");
1303 java_class->int_field_put(_static_oop_field_count_offset, size);
1304 }
1305
1306 oop java_lang_Class::protection_domain(oop java_class) {
1307 assert(_protection_domain_offset != 0, "must be set");
1308 return java_class->obj_field(_protection_domain_offset);
1309 }
1310 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1311 assert(_protection_domain_offset != 0, "must be set");
1312 java_class->obj_field_put(_protection_domain_offset, pd);
1313 }
1314
1315 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1316 assert(_component_mirror_offset != 0, "must be set");
1317 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1318 }
1319 oop java_lang_Class::component_mirror(oop java_class) {
1320 assert(_component_mirror_offset != 0, "must be set");
1321 return java_class->obj_field(_component_mirror_offset);
1322 }
1323
1324 oop java_lang_Class::init_lock(oop java_class) {
1325 assert(_init_lock_offset != 0, "must be set");
1326 return java_class->obj_field(_init_lock_offset);
1327 }
1328 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1329 assert(_init_lock_offset != 0, "must be set");
1330 java_class->obj_field_put(_init_lock_offset, init_lock);
1331 }
1332
1333 objArrayOop java_lang_Class::signers(oop java_class) {
1334 assert(_signers_offset != 0, "must be set");
1335 return (objArrayOop)java_class->obj_field(_signers_offset);
1336 }
1337 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1338 assert(_signers_offset != 0, "must be set");
1339 java_class->obj_field_put(_signers_offset, (oop)signers);
1340 }
1341
1342
1343 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1344 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1345 if (_class_loader_offset != 0) {
1346 java_class->obj_field_put(_class_loader_offset, loader);
1347 }
1348 }
1349
1350 oop java_lang_Class::class_loader(oop java_class) {
1351 assert(_class_loader_offset != 0, "must be set");
1352 return java_class->obj_field(_class_loader_offset);
1353 }
1354
1355 oop java_lang_Class::module(oop java_class) {
1356 assert(_module_offset != 0, "must be set");
1357 return java_class->obj_field(_module_offset);
1358 }
1359
1360 void java_lang_Class::set_module(oop java_class, oop module) {
1361 assert(_module_offset != 0, "must be set");
1362 java_class->obj_field_put(_module_offset, module);
1363 }
1364
1365 oop java_lang_Class::name(Handle java_class, TRAPS) {
1366 assert(_name_offset != 0, "must be set");
1367 oop o = java_class->obj_field(_name_offset);
1368 if (o == NULL) {
1369 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1370 java_class->obj_field_put(_name_offset, o);
1371 }
1372 return o;
1373 }
1374
1375 oop java_lang_Class::source_file(oop java_class) {
1376 assert(_source_file_offset != 0, "must be set");
1377 return java_class->obj_field(_source_file_offset);
1378 }
1379
1380 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1381 assert(_source_file_offset != 0, "must be set");
1382 java_class->obj_field_put(_source_file_offset, source_file);
1383 }
1384
1385 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1386 // This should be improved by adding a field at the Java level or by
1387 // introducing a new VM klass (see comment in ClassFileParser)
1388 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1389 if (type != T_VOID) {
1390 Klass* aklass = Universe::typeArrayKlassObj(type);
1391 assert(aklass != NULL, "correct bootstrap");
1392 release_set_array_klass(java_class, aklass);
1393 }
1394 #ifdef ASSERT
1395 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1396 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1397 #endif
1398 return java_class;
1399 }
1400
1401
1402 Klass* java_lang_Class::as_Klass(oop java_class) {
1403 //%note memory_2
1404 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1405 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1406 assert(k == NULL || k->is_klass(), "type check");
1407 return k;
1408 }
1409
1410 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1411 //%note memory_2
1412 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1413 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1414 assert(k == NULL || k->is_klass(), "type check");
1415 return k;
1416 }
1417
1418
1419 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1420 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1421 java_class->metadata_field_put(_klass_offset, klass);
1422 }
1423
1424
1425 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1426 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1427 Symbol* name = NULL;
1428 bool is_instance = false;
1429 if (is_primitive(java_class)) {
1430 name = vmSymbols::type_signature(primitive_type(java_class));
1431 } else {
1432 Klass* k = as_Klass(java_class);
1433 is_instance = k->is_instance_klass();
1434 name = k->name();
1435 }
1436 if (name == NULL) {
1437 st->print("<null>");
1438 return;
1439 }
1440 if (is_instance) st->print("L");
1441 st->write((char*) name->base(), (int) name->utf8_length());
1442 if (is_instance) st->print(";");
1443 }
1444
1445 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1446 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1447 Symbol* name;
1448 if (is_primitive(java_class)) {
1449 name = vmSymbols::type_signature(primitive_type(java_class));
1450 // Because this can create a new symbol, the caller has to decrement
1451 // the refcount, so make adjustment here and below for symbols returned
1452 // that are not created or incremented due to a successful lookup.
1453 name->increment_refcount();
1454 } else {
1455 Klass* k = as_Klass(java_class);
1456 if (!k->is_instance_klass()) {
1457 name = k->name();
1458 name->increment_refcount();
1459 } else {
1460 ResourceMark rm;
1461 const char* sigstr = k->signature_name();
1462 int siglen = (int) strlen(sigstr);
1463 if (!intern_if_not_found) {
1464 name = SymbolTable::probe(sigstr, siglen);
1465 } else {
1466 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1467 }
1468 }
1469 }
1470 return name;
1471 }
1472
1473 // Returns the Java name for this Java mirror (Resource allocated)
1474 // See Klass::external_name().
1475 // For primitive type Java mirrors, its type name is returned.
1476 const char* java_lang_Class::as_external_name(oop java_class) {
1477 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1478 const char* name = NULL;
1479 if (is_primitive(java_class)) {
1480 name = type2name(primitive_type(java_class));
1481 } else {
1482 name = as_Klass(java_class)->external_name();
1483 }
1484 if (name == NULL) {
1485 name = "<null>";
1486 }
1487 return name;
1488 }
1489
1490 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1491 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1492 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1493 return k;
1494 }
1495
1496
1497 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1498 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1499 java_class->release_metadata_field_put(_array_klass_offset, klass);
1500 }
1501
1502
1503 BasicType java_lang_Class::primitive_type(oop java_class) {
1504 assert(java_lang_Class::is_primitive(java_class), "just checking");
1505 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1506 BasicType type = T_VOID;
1507 if (ak != NULL) {
1508 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1509 type = ArrayKlass::cast(ak)->element_type();
1510 } else {
1511 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1512 }
1513 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1514 return type;
1515 }
1516
1517 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1518 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1519 if (is_primitive(java_class)) {
1520 if (reference_klass != NULL)
1521 (*reference_klass) = NULL;
1522 return primitive_type(java_class);
1523 } else {
1524 if (reference_klass != NULL)
1525 (*reference_klass) = as_Klass(java_class);
1526 return T_OBJECT;
1527 }
1528 }
1529
1530
1531 oop java_lang_Class::primitive_mirror(BasicType t) {
1532 oop mirror = Universe::java_mirror(t);
1533 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1534 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1535 return mirror;
1536 }
1537
1538 bool java_lang_Class::offsets_computed = false;
1539 int java_lang_Class::classRedefinedCount_offset = -1;
1540
1541 #define CLASS_FIELDS_DO(macro) \
1542 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1543 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1544 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1545 macro(_module_offset, k, "module", module_signature, false); \
1546 macro(_name_offset, k, "name", string_signature, false); \
1547
1548 void java_lang_Class::compute_offsets() {
1549 if (offsets_computed) {
1550 return;
1551 }
1552
1553 offsets_computed = true;
1554
1555 InstanceKlass* k = SystemDictionary::Class_klass();
1556 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1557
1558 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1559 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1560 // GC treats them the same.
1561 _init_lock_offset = _component_mirror_offset;
1562
1563 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1564 }
1565
1566 #if INCLUDE_CDS
1567 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1568 f->do_u4((u4*)&offsets_computed);
1569 f->do_u4((u4*)&_init_lock_offset);
1570
1571 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1572
1573 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1574 }
1575 #endif
1576
1577 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1578 if (classRedefinedCount_offset == -1) {
1579 // If we don't have an offset for it then just return -1 as a marker.
1580 return -1;
1581 }
1582
1583 return the_class_mirror->int_field(classRedefinedCount_offset);
1584 }
1585
1586 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1587 if (classRedefinedCount_offset == -1) {
1588 // If we don't have an offset for it then nothing to set.
1589 return;
1590 }
1591
1592 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1593 }
1594
1595
1596 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1597 // platform thread structure, and a eetop offset which was used for thread
1598 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1599 // merged, so in the HotSpot VM we just use the eetop field for the thread
1600 // instead of the privateInfo_offset.
1601 //
1602 // Note: The stackSize field is only present starting in 1.4.
1603
1604 int java_lang_Thread::_name_offset = 0;
1605 int java_lang_Thread::_group_offset = 0;
1606 int java_lang_Thread::_contextClassLoader_offset = 0;
1607 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1608 int java_lang_Thread::_priority_offset = 0;
1609 int java_lang_Thread::_eetop_offset = 0;
1610 int java_lang_Thread::_daemon_offset = 0;
1611 int java_lang_Thread::_stillborn_offset = 0;
1612 int java_lang_Thread::_stackSize_offset = 0;
1613 int java_lang_Thread::_tid_offset = 0;
1614 int java_lang_Thread::_thread_status_offset = 0;
1615 int java_lang_Thread::_park_blocker_offset = 0;
1616 int java_lang_Thread::_park_event_offset = 0 ;
1617
1618 #define THREAD_FIELDS_DO(macro) \
1619 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1620 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1621 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1622 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1623 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1624 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1625 macro(_eetop_offset, k, "eetop", long_signature, false); \
1626 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1627 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1628 macro(_tid_offset, k, "tid", long_signature, false); \
1629 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1630 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1631 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false)
1632
1633 void java_lang_Thread::compute_offsets() {
1634 assert(_group_offset == 0, "offsets should be initialized only once");
1635
1636 InstanceKlass* k = SystemDictionary::Thread_klass();
1637 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1638 }
1639
1640 #if INCLUDE_CDS
1641 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1642 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1643 }
1644 #endif
1645
1646 JavaThread* java_lang_Thread::thread(oop java_thread) {
1647 return (JavaThread*)java_thread->address_field(_eetop_offset);
1648 }
1649
1650
1651 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1652 java_thread->address_field_put(_eetop_offset, (address)thread);
1653 }
1654
1655
1656 oop java_lang_Thread::name(oop java_thread) {
1657 return java_thread->obj_field(_name_offset);
1658 }
1659
1660
1661 void java_lang_Thread::set_name(oop java_thread, oop name) {
1662 java_thread->obj_field_put(_name_offset, name);
1663 }
1664
1665
1666 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1667 return (ThreadPriority)java_thread->int_field(_priority_offset);
1668 }
1669
1670
1671 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1672 java_thread->int_field_put(_priority_offset, priority);
1673 }
1674
1675
1676 oop java_lang_Thread::threadGroup(oop java_thread) {
1677 return java_thread->obj_field(_group_offset);
1678 }
1679
1680
1681 bool java_lang_Thread::is_stillborn(oop java_thread) {
1682 return java_thread->bool_field(_stillborn_offset) != 0;
1683 }
1684
1685
1686 // We never have reason to turn the stillborn bit off
1687 void java_lang_Thread::set_stillborn(oop java_thread) {
1688 java_thread->bool_field_put(_stillborn_offset, true);
1689 }
1690
1691
1692 bool java_lang_Thread::is_alive(oop java_thread) {
1693 JavaThread* thr = java_lang_Thread::thread(java_thread);
1694 return (thr != NULL);
1695 }
1696
1697
1698 bool java_lang_Thread::is_daemon(oop java_thread) {
1699 return java_thread->bool_field(_daemon_offset) != 0;
1700 }
1701
1702
1703 void java_lang_Thread::set_daemon(oop java_thread) {
1704 java_thread->bool_field_put(_daemon_offset, true);
1705 }
1706
1707 oop java_lang_Thread::context_class_loader(oop java_thread) {
1708 return java_thread->obj_field(_contextClassLoader_offset);
1709 }
1710
1711 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1712 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1713 }
1714
1715
1716 jlong java_lang_Thread::stackSize(oop java_thread) {
1717 if (_stackSize_offset > 0) {
1718 return java_thread->long_field(_stackSize_offset);
1719 } else {
1720 return 0;
1721 }
1722 }
1723
1724 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1725 void java_lang_Thread::set_thread_status(oop java_thread,
1726 java_lang_Thread::ThreadStatus status) {
1727 // The threadStatus is only present starting in 1.5
1728 if (_thread_status_offset > 0) {
1729 java_thread->int_field_put(_thread_status_offset, status);
1730 }
1731 }
1732
1733 // Read thread status value from threadStatus field in java.lang.Thread java class.
1734 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1735 // Make sure the caller is operating on behalf of the VM or is
1736 // running VM code (state == _thread_in_vm).
1737 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1738 JavaThread::current()->thread_state() == _thread_in_vm,
1739 "Java Thread is not running in vm");
1740 // The threadStatus is only present starting in 1.5
1741 if (_thread_status_offset > 0) {
1742 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1743 } else {
1744 // All we can easily figure out is if it is alive, but that is
1745 // enough info for a valid unknown status.
1746 // These aren't restricted to valid set ThreadStatus values, so
1747 // use JVMTI values and cast.
1748 JavaThread* thr = java_lang_Thread::thread(java_thread);
1749 if (thr == NULL) {
1750 // the thread hasn't run yet or is in the process of exiting
1751 return NEW;
1752 }
1753 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1754 }
1755 }
1756
1757
1758 jlong java_lang_Thread::thread_id(oop java_thread) {
1759 // The thread ID field is only present starting in 1.5
1760 if (_tid_offset > 0) {
1761 return java_thread->long_field(_tid_offset);
1762 } else {
1763 return 0;
1764 }
1765 }
1766
1767 oop java_lang_Thread::park_blocker(oop java_thread) {
1768 assert(JDK_Version::current().supports_thread_park_blocker() &&
1769 _park_blocker_offset != 0, "Must support parkBlocker field");
1770
1771 if (_park_blocker_offset > 0) {
1772 return java_thread->obj_field(_park_blocker_offset);
1773 }
1774
1775 return NULL;
1776 }
1777
1778 jlong java_lang_Thread::park_event(oop java_thread) {
1779 if (_park_event_offset > 0) {
1780 return java_thread->long_field(_park_event_offset);
1781 }
1782 return 0;
1783 }
1784
1785 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1786 if (_park_event_offset > 0) {
1787 java_thread->long_field_put(_park_event_offset, ptr);
1788 return true;
1789 }
1790 return false;
1791 }
1792
1793
1794 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1795 assert(_thread_status_offset != 0, "Must have thread status");
1796 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1797 switch (status) {
1798 case NEW : return "NEW";
1799 case RUNNABLE : return "RUNNABLE";
1800 case SLEEPING : return "TIMED_WAITING (sleeping)";
1801 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1802 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1803 case PARKED : return "WAITING (parking)";
1804 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1805 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1806 case TERMINATED : return "TERMINATED";
1807 default : return "UNKNOWN";
1808 };
1809 }
1810 int java_lang_ThreadGroup::_parent_offset = 0;
1811 int java_lang_ThreadGroup::_name_offset = 0;
1812 int java_lang_ThreadGroup::_threads_offset = 0;
1813 int java_lang_ThreadGroup::_groups_offset = 0;
1814 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1815 int java_lang_ThreadGroup::_destroyed_offset = 0;
1816 int java_lang_ThreadGroup::_daemon_offset = 0;
1817 int java_lang_ThreadGroup::_nthreads_offset = 0;
1818 int java_lang_ThreadGroup::_ngroups_offset = 0;
1819
1820 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1821 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1822 return java_thread_group->obj_field(_parent_offset);
1823 }
1824
1825 // ("name as oop" accessor is not necessary)
1826
1827 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1828 oop name = java_thread_group->obj_field(_name_offset);
1829 // ThreadGroup.name can be null
1830 if (name != NULL) {
1831 return java_lang_String::as_utf8_string(name);
1832 }
1833 return NULL;
1834 }
1835
1836 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1837 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1838 return java_thread_group->int_field(_nthreads_offset);
1839 }
1840
1841 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1842 oop threads = java_thread_group->obj_field(_threads_offset);
1843 assert(threads != NULL, "threadgroups should have threads");
1844 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1845 return objArrayOop(threads);
1846 }
1847
1848 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1849 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1850 return java_thread_group->int_field(_ngroups_offset);
1851 }
1852
1853 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1854 oop groups = java_thread_group->obj_field(_groups_offset);
1855 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1856 return objArrayOop(groups);
1857 }
1858
1859 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1860 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1861 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1862 }
1863
1864 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1865 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1866 return java_thread_group->bool_field(_destroyed_offset) != 0;
1867 }
1868
1869 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1870 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1871 return java_thread_group->bool_field(_daemon_offset) != 0;
1872 }
1873
1874 #define THREADGROUP_FIELDS_DO(macro) \
1875 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1876 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1877 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1878 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1879 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1880 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1881 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1882 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1883 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1884
1885 void java_lang_ThreadGroup::compute_offsets() {
1886 assert(_parent_offset == 0, "offsets should be initialized only once");
1887
1888 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1889 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1890 }
1891
1892 #if INCLUDE_CDS
1893 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1894 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1895 }
1896 #endif
1897
1898 #define THROWABLE_FIELDS_DO(macro) \
1899 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1900 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1901 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1902 macro(depth_offset, k, "depth", int_signature, false); \
1903 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1904
1905 void java_lang_Throwable::compute_offsets() {
1906 InstanceKlass* k = SystemDictionary::Throwable_klass();
1907 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1908 }
1909
1910 #if INCLUDE_CDS
1911 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1912 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1913 }
1914 #endif
1915
1916 oop java_lang_Throwable::unassigned_stacktrace() {
1917 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1918 oop base = ik->static_field_base_raw();
1919 return base->obj_field(static_unassigned_stacktrace_offset);
1920 }
1921
1922 oop java_lang_Throwable::backtrace(oop throwable) {
1923 return throwable->obj_field_acquire(backtrace_offset);
1924 }
1925
1926
1927 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1928 throwable->release_obj_field_put(backtrace_offset, value);
1929 }
1930
1931 int java_lang_Throwable::depth(oop throwable) {
1932 return throwable->int_field(depth_offset);
1933 }
1934
1935 void java_lang_Throwable::set_depth(oop throwable, int value) {
1936 throwable->int_field_put(depth_offset, value);
1937 }
1938
1939 oop java_lang_Throwable::message(oop throwable) {
1940 return throwable->obj_field(detailMessage_offset);
1941 }
1942
1943
1944 // Return Symbol for detailed_message or NULL
1945 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1946 PRESERVE_EXCEPTION_MARK; // Keep original exception
1947 oop detailed_message = java_lang_Throwable::message(throwable);
1948 if (detailed_message != NULL) {
1949 return java_lang_String::as_symbol(detailed_message, THREAD);
1950 }
1951 return NULL;
1952 }
1953
1954 void java_lang_Throwable::set_message(oop throwable, oop value) {
1955 throwable->obj_field_put(detailMessage_offset, value);
1956 }
1957
1958
1959 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1960 throwable->obj_field_put(stackTrace_offset, st_element_array);
1961 }
1962
1963 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1964 set_stacktrace(throwable, NULL);
1965 }
1966
1967
1968 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1969 ResourceMark rm;
1970 Klass* k = throwable->klass();
1971 assert(k != NULL, "just checking");
1972 st->print("%s", k->external_name());
1973 oop msg = message(throwable);
1974 if (msg != NULL) {
1975 st->print(": %s", java_lang_String::as_utf8_string(msg));
1976 }
1977 }
1978
1979 // After this many redefines, the stack trace is unreliable.
1980 const int MAX_VERSION = USHRT_MAX;
1981
1982 static inline bool version_matches(Method* method, int version) {
1983 assert(version < MAX_VERSION, "version is too big");
1984 return method != NULL && (method->constants()->version() == version);
1985 }
1986
1987
1988 // This class provides a simple wrapper over the internal structure of
1989 // exception backtrace to insulate users of the backtrace from needing
1990 // to know what it looks like.
1991 class BacktraceBuilder: public StackObj {
1992 friend class BacktraceIterator;
1993 private:
1994 Handle _backtrace;
1995 objArrayOop _head;
1996 typeArrayOop _methods;
1997 typeArrayOop _bcis;
1998 objArrayOop _mirrors;
1999 typeArrayOop _names; // needed to insulate method name against redefinition
2000 int _index;
2001 NoSafepointVerifier _nsv;
2002
2003 enum {
2004 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2005 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2006 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2007 trace_names_offset = java_lang_Throwable::trace_names_offset,
2008 trace_next_offset = java_lang_Throwable::trace_next_offset,
2009 trace_size = java_lang_Throwable::trace_size,
2010 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2011 };
2012
2013 // get info out of chunks
2014 static typeArrayOop get_methods(objArrayHandle chunk) {
2015 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2016 assert(methods != NULL, "method array should be initialized in backtrace");
2017 return methods;
2018 }
2019 static typeArrayOop get_bcis(objArrayHandle chunk) {
2020 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2021 assert(bcis != NULL, "bci array should be initialized in backtrace");
2022 return bcis;
2023 }
2024 static objArrayOop get_mirrors(objArrayHandle chunk) {
2025 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2026 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2027 return mirrors;
2028 }
2029 static typeArrayOop get_names(objArrayHandle chunk) {
2030 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2031 assert(names != NULL, "names array should be initialized in backtrace");
2032 return names;
2033 }
2034
2035 public:
2036
2037 // constructor for new backtrace
2038 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2039 expand(CHECK);
2040 _backtrace = Handle(THREAD, _head);
2041 _index = 0;
2042 }
2043
2044 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2045 _methods = get_methods(backtrace);
2046 _bcis = get_bcis(backtrace);
2047 _mirrors = get_mirrors(backtrace);
2048 _names = get_names(backtrace);
2049 assert(_methods->length() == _bcis->length() &&
2050 _methods->length() == _mirrors->length() &&
2051 _mirrors->length() == _names->length(),
2052 "method and source information arrays should match");
2053
2054 // head is the preallocated backtrace
2055 _head = backtrace();
2056 _backtrace = Handle(thread, _head);
2057 _index = 0;
2058 }
2059
2060 void expand(TRAPS) {
2061 objArrayHandle old_head(THREAD, _head);
2062 PauseNoSafepointVerifier pnsv(&_nsv);
2063
2064 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2065 objArrayHandle new_head(THREAD, head);
2066
2067 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2068 typeArrayHandle new_methods(THREAD, methods);
2069
2070 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2071 typeArrayHandle new_bcis(THREAD, bcis);
2072
2073 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2074 objArrayHandle new_mirrors(THREAD, mirrors);
2075
2076 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2077 typeArrayHandle new_names(THREAD, names);
2078
2079 if (!old_head.is_null()) {
2080 old_head->obj_at_put(trace_next_offset, new_head());
2081 }
2082 new_head->obj_at_put(trace_methods_offset, new_methods());
2083 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2084 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2085 new_head->obj_at_put(trace_names_offset, new_names());
2086
2087 _head = new_head();
2088 _methods = new_methods();
2089 _bcis = new_bcis();
2090 _mirrors = new_mirrors();
2091 _names = new_names();
2092 _index = 0;
2093 }
2094
2095 oop backtrace() {
2096 return _backtrace();
2097 }
2098
2099 inline void push(Method* method, int bci, TRAPS) {
2100 // Smear the -1 bci to 0 since the array only holds unsigned
2101 // shorts. The later line number lookup would just smear the -1
2102 // to a 0 even if it could be recorded.
2103 if (bci == SynchronizationEntryBCI) bci = 0;
2104
2105 if (_index >= trace_chunk_size) {
2106 methodHandle mhandle(THREAD, method);
2107 expand(CHECK);
2108 method = mhandle();
2109 }
2110
2111 _methods->ushort_at_put(_index, method->orig_method_idnum());
2112 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2113
2114 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2115 // klass owning the symbols alive so their refcounts aren't decremented.
2116 Symbol* name = method->name();
2117 _names->symbol_at_put(_index, name);
2118
2119 // We need to save the mirrors in the backtrace to keep the class
2120 // from being unloaded while we still have this stack trace.
2121 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2122 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2123 _index++;
2124 }
2125
2126 };
2127
2128 struct BacktraceElement : public StackObj {
2129 int _method_id;
2130 int _bci;
2131 int _version;
2132 Symbol* _name;
2133 Handle _mirror;
2134 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2135 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2136 };
2137
2138 class BacktraceIterator : public StackObj {
2139 int _index;
2140 objArrayHandle _result;
2141 objArrayHandle _mirrors;
2142 typeArrayHandle _methods;
2143 typeArrayHandle _bcis;
2144 typeArrayHandle _names;
2145
2146 void init(objArrayHandle result, Thread* thread) {
2147 // Get method id, bci, version and mirror from chunk
2148 _result = result;
2149 if (_result.not_null()) {
2150 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2151 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2152 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2153 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2154 _index = 0;
2155 }
2156 }
2157 public:
2158 BacktraceIterator(objArrayHandle result, Thread* thread) {
2159 init(result, thread);
2160 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2161 }
2162
2163 BacktraceElement next(Thread* thread) {
2164 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2165 _methods->ushort_at(_index),
2166 Backtrace::version_at(_bcis->int_at(_index)),
2167 Backtrace::bci_at(_bcis->int_at(_index)),
2168 _names->symbol_at(_index));
2169 _index++;
2170
2171 if (_index >= java_lang_Throwable::trace_chunk_size) {
2172 int next_offset = java_lang_Throwable::trace_next_offset;
2173 // Get next chunk
2174 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2175 init(result, thread);
2176 }
2177 return e;
2178 }
2179
2180 bool repeat() {
2181 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2182 }
2183 };
2184
2185
2186 // Print stack trace element to resource allocated buffer
2187 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2188 int version, int bci, Symbol* name) {
2189 ResourceMark rm;
2190
2191 // Get strings and string lengths
2192 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2193 const char* klass_name = holder->external_name();
2194 int buf_len = (int)strlen(klass_name);
2195
2196 char* method_name = name->as_C_string();
2197 buf_len += (int)strlen(method_name);
2198
2199 char* source_file_name = NULL;
2200 Symbol* source = Backtrace::get_source_file_name(holder, version);
2201 if (source != NULL) {
2202 source_file_name = source->as_C_string();
2203 buf_len += (int)strlen(source_file_name);
2204 }
2205
2206 char *module_name = NULL, *module_version = NULL;
2207 ModuleEntry* module = holder->module();
2208 if (module->is_named()) {
2209 module_name = module->name()->as_C_string();
2210 buf_len += (int)strlen(module_name);
2211 if (module->version() != NULL) {
2212 module_version = module->version()->as_C_string();
2213 buf_len += (int)strlen(module_version);
2214 }
2215 }
2216
2217 // Allocate temporary buffer with extra space for formatting and line number
2218 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2219
2220 // Print stack trace line in buffer
2221 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2222
2223 // Print module information
2224 if (module_name != NULL) {
2225 if (module_version != NULL) {
2226 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2227 } else {
2228 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2229 }
2230 }
2231
2232 // The method can be NULL if the requested class version is gone
2233 Method* method = holder->method_with_orig_idnum(method_id, version);
2234 if (!version_matches(method, version)) {
2235 strcat(buf, "Redefined)");
2236 } else {
2237 int line_number = Backtrace::get_line_number(method, bci);
2238 if (line_number == -2) {
2239 strcat(buf, "Native Method)");
2240 } else {
2241 if (source_file_name != NULL && (line_number != -1)) {
2242 // Sourcename and linenumber
2243 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2244 } else if (source_file_name != NULL) {
2245 // Just sourcename
2246 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2247 } else {
2248 // Neither sourcename nor linenumber
2249 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2250 }
2251 CompiledMethod* nm = method->code();
2252 if (WizardMode && nm != NULL) {
2253 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2254 }
2255 }
2256 }
2257
2258 st->print_cr("%s", buf);
2259 }
2260
2261 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2262 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2263 int method_id = method->orig_method_idnum();
2264 int version = method->constants()->version();
2265 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2266 }
2267
2268 /**
2269 * Print the throwable message and its stack trace plus all causes by walking the
2270 * cause chain. The output looks the same as of Throwable.printStackTrace().
2271 */
2272 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2273 // First, print the message.
2274 print(throwable(), st);
2275 st->cr();
2276
2277 // Now print the stack trace.
2278 Thread* THREAD = Thread::current();
2279 while (throwable.not_null()) {
2280 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2281 if (result.is_null()) {
2282 st->print_raw_cr("\t<<no stack trace available>>");
2283 return;
2284 }
2285 BacktraceIterator iter(result, THREAD);
2286
2287 while (iter.repeat()) {
2288 BacktraceElement bte = iter.next(THREAD);
2289 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2290 }
2291 {
2292 // Call getCause() which doesn't necessarily return the _cause field.
2293 EXCEPTION_MARK;
2294 JavaValue cause(T_OBJECT);
2295 JavaCalls::call_virtual(&cause,
2296 throwable,
2297 throwable->klass(),
2298 vmSymbols::getCause_name(),
2299 vmSymbols::void_throwable_signature(),
2300 THREAD);
2301 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2302 if (HAS_PENDING_EXCEPTION) {
2303 CLEAR_PENDING_EXCEPTION;
2304 throwable = Handle();
2305 } else {
2306 throwable = Handle(THREAD, (oop) cause.get_jobject());
2307 if (throwable.not_null()) {
2308 st->print("Caused by: ");
2309 print(throwable(), st);
2310 st->cr();
2311 }
2312 }
2313 }
2314 }
2315 }
2316
2317 /**
2318 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2319 */
2320 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2321 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2322 JavaValue result(T_VOID);
2323 JavaCalls::call_virtual(&result,
2324 throwable,
2325 SystemDictionary::Throwable_klass(),
2326 vmSymbols::printStackTrace_name(),
2327 vmSymbols::void_method_signature(),
2328 THREAD);
2329 }
2330
2331 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2332 if (!StackTraceInThrowable) return;
2333 ResourceMark rm(THREAD);
2334
2335 // Start out by clearing the backtrace for this object, in case the VM
2336 // runs out of memory while allocating the stack trace
2337 set_backtrace(throwable(), NULL);
2338 // Clear lazily constructed Java level stacktrace if refilling occurs
2339 // This is unnecessary in 1.7+ but harmless
2340 clear_stacktrace(throwable());
2341
2342 int max_depth = MaxJavaStackTraceDepth;
2343 JavaThread* thread = (JavaThread*)THREAD;
2344
2345 BacktraceBuilder bt(CHECK);
2346
2347 // If there is no Java frame just return the method that was being called
2348 // with bci 0
2349 if (!thread->has_last_Java_frame()) {
2350 if (max_depth >= 1 && method() != NULL) {
2351 bt.push(method(), 0, CHECK);
2352 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2353 set_depth(throwable(), 1);
2354 set_backtrace(throwable(), bt.backtrace());
2355 }
2356 return;
2357 }
2358
2359 // Instead of using vframe directly, this version of fill_in_stack_trace
2360 // basically handles everything by hand. This significantly improved the
2361 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2362 // See bug 6333838 for more details.
2363 // The "ASSERT" here is to verify this method generates the exactly same stack
2364 // trace as utilizing vframe.
2365 #ifdef ASSERT
2366 vframeStream st(thread);
2367 methodHandle st_method(THREAD, st.method());
2368 #endif
2369 int total_count = 0;
2370 RegisterMap map(thread, false);
2371 int decode_offset = 0;
2372 CompiledMethod* nm = NULL;
2373 bool skip_fillInStackTrace_check = false;
2374 bool skip_throwableInit_check = false;
2375 bool skip_hidden = !ShowHiddenFrames;
2376
2377 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2378 Method* method = NULL;
2379 int bci = 0;
2380
2381 // Compiled java method case.
2382 if (decode_offset != 0) {
2383 DebugInfoReadStream stream(nm, decode_offset);
2384 decode_offset = stream.read_int();
2385 method = (Method*)nm->metadata_at(stream.read_int());
2386 bci = stream.read_bci();
2387 } else {
2388 if (fr.is_first_frame()) break;
2389 address pc = fr.pc();
2390 if (fr.is_interpreted_frame()) {
2391 address bcp = fr.interpreter_frame_bcp();
2392 method = fr.interpreter_frame_method();
2393 bci = method->bci_from(bcp);
2394 fr = fr.sender(&map);
2395 } else {
2396 CodeBlob* cb = fr.cb();
2397 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2398 // but non nmethod
2399 fr = fr.sender(&map);
2400 if (cb == NULL || !cb->is_compiled()) {
2401 continue;
2402 }
2403 nm = cb->as_compiled_method();
2404 if (nm->method()->is_native()) {
2405 method = nm->method();
2406 bci = 0;
2407 } else {
2408 PcDesc* pd = nm->pc_desc_at(pc);
2409 decode_offset = pd->scope_decode_offset();
2410 // if decode_offset is not equal to 0, it will execute the
2411 // "compiled java method case" at the beginning of the loop.
2412 continue;
2413 }
2414 }
2415 }
2416 #ifdef ASSERT
2417 assert(st_method() == method && st.bci() == bci,
2418 "Wrong stack trace");
2419 st.next();
2420 // vframeStream::method isn't GC-safe so store off a copy
2421 // of the Method* in case we GC.
2422 if (!st.at_end()) {
2423 st_method = st.method();
2424 }
2425 #endif
2426
2427 // the format of the stacktrace will be:
2428 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2429 // - 0 or more <init> methods for the exception class (skipped)
2430 // - rest of the stack
2431
2432 if (!skip_fillInStackTrace_check) {
2433 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2434 throwable->is_a(method->method_holder())) {
2435 continue;
2436 }
2437 else {
2438 skip_fillInStackTrace_check = true; // gone past them all
2439 }
2440 }
2441 if (!skip_throwableInit_check) {
2442 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2443
2444 // skip <init> methods of the exception class and superclasses
2445 // This is simlar to classic VM.
2446 if (method->name() == vmSymbols::object_initializer_name() &&
2447 throwable->is_a(method->method_holder())) {
2448 continue;
2449 } else {
2450 // there are none or we've seen them all - either way stop checking
2451 skip_throwableInit_check = true;
2452 }
2453 }
2454 if (method->is_hidden()) {
2455 if (skip_hidden) continue;
2456 }
2457 bt.push(method, bci, CHECK);
2458 total_count++;
2459 }
2460
2461 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2462
2463 // Put completed stack trace into throwable object
2464 set_backtrace(throwable(), bt.backtrace());
2465 set_depth(throwable(), total_count);
2466 }
2467
2468 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2469 // No-op if stack trace is disabled
2470 if (!StackTraceInThrowable) {
2471 return;
2472 }
2473
2474 // Disable stack traces for some preallocated out of memory errors
2475 if (!Universe::should_fill_in_stack_trace(throwable)) {
2476 return;
2477 }
2478
2479 PRESERVE_EXCEPTION_MARK;
2480
2481 JavaThread* thread = JavaThread::active();
2482 fill_in_stack_trace(throwable, method, thread);
2483 // ignore exceptions thrown during stack trace filling
2484 CLEAR_PENDING_EXCEPTION;
2485 }
2486
2487 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2488 // Allocate stack trace - backtrace is created but not filled in
2489
2490 // No-op if stack trace is disabled
2491 if (!StackTraceInThrowable) return;
2492 BacktraceBuilder bt(CHECK); // creates a backtrace
2493 set_backtrace(throwable(), bt.backtrace());
2494 }
2495
2496
2497 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2498 // Fill in stack trace into preallocated backtrace (no GC)
2499
2500 // No-op if stack trace is disabled
2501 if (!StackTraceInThrowable) return;
2502
2503 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2504
2505 JavaThread* THREAD = JavaThread::current();
2506
2507 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2508 assert(backtrace.not_null(), "backtrace should have been preallocated");
2509
2510 ResourceMark rm(THREAD);
2511 vframeStream st(THREAD);
2512
2513 BacktraceBuilder bt(THREAD, backtrace);
2514
2515 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2516 // methods as preallocated errors aren't created by "java" code.
2517
2518 // fill in as much stack trace as possible
2519 int chunk_count = 0;
2520 for (;!st.at_end(); st.next()) {
2521 bt.push(st.method(), st.bci(), CHECK);
2522 chunk_count++;
2523
2524 // Bail-out for deep stacks
2525 if (chunk_count >= trace_chunk_size) break;
2526 }
2527 set_depth(throwable(), chunk_count);
2528 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2529
2530 // We support the Throwable immutability protocol defined for Java 7.
2531 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2532 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2533 }
2534
2535 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2536 objArrayHandle stack_trace_array_h, TRAPS) {
2537
2538 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2539 THROW(vmSymbols::java_lang_NullPointerException());
2540 }
2541
2542 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2543
2544 if (stack_trace_array_h->length() != depth(throwable())) {
2545 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2546 }
2547
2548 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2549 BacktraceIterator iter(result, THREAD);
2550
2551 int index = 0;
2552 while (iter.repeat()) {
2553 BacktraceElement bte = iter.next(THREAD);
2554
2555 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2556
2557 if (stack_trace_element.is_null()) {
2558 THROW(vmSymbols::java_lang_NullPointerException());
2559 }
2560
2561 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2562 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2563
2564 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2565 method,
2566 bte._version,
2567 bte._bci,
2568 bte._name, CHECK);
2569 }
2570 }
2571
2572 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2573 // Allocate java.lang.StackTraceElement instance
2574 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2575 assert(k != NULL, "must be loaded in 1.4+");
2576 if (k->should_be_initialized()) {
2577 k->initialize(CHECK_0);
2578 }
2579
2580 Handle element = k->allocate_instance_handle(CHECK_0);
2581
2582 int version = method->constants()->version();
2583 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2584 return element();
2585 }
2586
2587 void java_lang_StackTraceElement::fill_in(Handle element,
2588 InstanceKlass* holder, const methodHandle& method,
2589 int version, int bci, Symbol* name, TRAPS) {
2590 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2591
2592 ResourceMark rm(THREAD);
2593 HandleMark hm(THREAD);
2594
2595 // Fill in class name
2596 Handle java_class(THREAD, holder->java_mirror());
2597 oop classname = java_lang_Class::name(java_class, CHECK);
2598 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2599 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2600
2601 oop loader = holder->class_loader();
2602 if (loader != NULL) {
2603 oop loader_name = java_lang_ClassLoader::name(loader);
2604 if (loader_name != NULL)
2605 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2606 }
2607
2608 // Fill in method name
2609 oop methodname = StringTable::intern(name, CHECK);
2610 java_lang_StackTraceElement::set_methodName(element(), methodname);
2611
2612 // Fill in module name and version
2613 ModuleEntry* module = holder->module();
2614 if (module->is_named()) {
2615 oop module_name = StringTable::intern(module->name(), CHECK);
2616 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2617 oop module_version;
2618 if (module->version() != NULL) {
2619 module_version = StringTable::intern(module->version(), CHECK);
2620 } else {
2621 module_version = NULL;
2622 }
2623 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2624 }
2625
2626 if (method() == NULL || !version_matches(method(), version)) {
2627 // The method was redefined, accurate line number information isn't available
2628 java_lang_StackTraceElement::set_fileName(element(), NULL);
2629 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2630 } else {
2631 // Fill in source file name and line number.
2632 Symbol* source = Backtrace::get_source_file_name(holder, version);
2633 oop source_file = java_lang_Class::source_file(java_class());
2634 if (source != NULL) {
2635 // Class was not redefined. We can trust its cache if set,
2636 // else we have to initialize it.
2637 if (source_file == NULL) {
2638 source_file = StringTable::intern(source, CHECK);
2639 java_lang_Class::set_source_file(java_class(), source_file);
2640 }
2641 } else {
2642 // Class was redefined. Dump the cache if it was set.
2643 if (source_file != NULL) {
2644 source_file = NULL;
2645 java_lang_Class::set_source_file(java_class(), source_file);
2646 }
2647 if (ShowHiddenFrames) {
2648 source = vmSymbols::unknown_class_name();
2649 source_file = StringTable::intern(source, CHECK);
2650 }
2651 }
2652 java_lang_StackTraceElement::set_fileName(element(), source_file);
2653
2654 int line_number = Backtrace::get_line_number(method, bci);
2655 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2656 }
2657 }
2658
2659 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2660 HandleMark hm(THREAD);
2661 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2662 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2663 // we should expand MemberName::name when Throwable uses StackTrace
2664 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2665 return method;
2666 }
2667
2668 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2669 // set Method* or mid/cpref
2670 HandleMark hm(THREAD);
2671 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2672 InstanceKlass* ik = method->method_holder();
2673 CallInfo info(method(), ik, CHECK);
2674 MethodHandles::init_method_MemberName(mname, info);
2675 // set bci
2676 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2677 // method may be redefined; store the version
2678 int version = method->constants()->version();
2679 assert((jushort)version == version, "version should be short");
2680 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2681 }
2682
2683 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2684 ResourceMark rm(THREAD);
2685 HandleMark hm(THREAD);
2686 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2687 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2688 InstanceKlass* holder = InstanceKlass::cast(clazz);
2689 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2690
2691 short version = stackFrame->short_field(_version_offset);
2692 short bci = stackFrame->short_field(_bci_offset);
2693 Symbol* name = method->name();
2694 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2695 }
2696
2697 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2698 macro(_memberName_offset, k, "memberName", object_signature, false); \
2699 macro(_bci_offset, k, "bci", short_signature, false)
2700
2701 void java_lang_StackFrameInfo::compute_offsets() {
2702 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2703 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2704 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2705 }
2706
2707 #if INCLUDE_CDS
2708 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2709 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2710 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2711 }
2712 #endif
2713
2714 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2715 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2716 macro(_locals_offset, k, "locals", object_array_signature, false); \
2717 macro(_operands_offset, k, "operands", object_array_signature, false); \
2718 macro(_mode_offset, k, "mode", int_signature, false)
2719
2720 void java_lang_LiveStackFrameInfo::compute_offsets() {
2721 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2722 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2723 }
2724
2725 #if INCLUDE_CDS
2726 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2727 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2728 }
2729 #endif
2730
2731 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2732 macro(override_offset, k, "override", bool_signature, false)
2733
2734 void java_lang_reflect_AccessibleObject::compute_offsets() {
2735 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2736 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2737 }
2738
2739 #if INCLUDE_CDS
2740 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2741 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2742 }
2743 #endif
2744
2745 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2746 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2747 return (jboolean) reflect->bool_field(override_offset);
2748 }
2749
2750 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2751 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2752 reflect->bool_field_put(override_offset, (int) value);
2753 }
2754
2755 #define METHOD_FIELDS_DO(macro) \
2756 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2757 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2758 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2759 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2760 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2761 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2762 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2763 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2764 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2765 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2766 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2767
2768 void java_lang_reflect_Method::compute_offsets() {
2769 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2770 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2771 }
2772
2773 #if INCLUDE_CDS
2774 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2775 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2776 }
2777 #endif
2778
2779 Handle java_lang_reflect_Method::create(TRAPS) {
2780 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2781 Klass* klass = SystemDictionary::reflect_Method_klass();
2782 // This class is eagerly initialized during VM initialization, since we keep a refence
2783 // to one of the methods
2784 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2785 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2786 }
2787
2788 oop java_lang_reflect_Method::clazz(oop reflect) {
2789 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2790 return reflect->obj_field(clazz_offset);
2791 }
2792
2793 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2795 reflect->obj_field_put(clazz_offset, value);
2796 }
2797
2798 int java_lang_reflect_Method::slot(oop reflect) {
2799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2800 return reflect->int_field(slot_offset);
2801 }
2802
2803 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2804 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2805 reflect->int_field_put(slot_offset, value);
2806 }
2807
2808 void java_lang_reflect_Method::set_name(oop method, oop value) {
2809 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2810 method->obj_field_put(name_offset, value);
2811 }
2812
2813 oop java_lang_reflect_Method::return_type(oop method) {
2814 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2815 return method->obj_field(returnType_offset);
2816 }
2817
2818 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2819 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2820 method->obj_field_put(returnType_offset, value);
2821 }
2822
2823 oop java_lang_reflect_Method::parameter_types(oop method) {
2824 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2825 return method->obj_field(parameterTypes_offset);
2826 }
2827
2828 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2829 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2830 method->obj_field_put(parameterTypes_offset, value);
2831 }
2832
2833 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2834 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2835 method->obj_field_put(exceptionTypes_offset, value);
2836 }
2837
2838 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2839 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2840 method->int_field_put(modifiers_offset, value);
2841 }
2842
2843 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2844 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2845 method->obj_field_put(signature_offset, value);
2846 }
2847
2848 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2849 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2850 method->obj_field_put(annotations_offset, value);
2851 }
2852
2853 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2854 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2855 method->obj_field_put(parameter_annotations_offset, value);
2856 }
2857
2858 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2859 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2860 method->obj_field_put(annotation_default_offset, value);
2861 }
2862
2863 #define CONSTRUCTOR_FIELDS_DO(macro) \
2864 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2865 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2866 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2867 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2868 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2869 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2870 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2871 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2872
2873 void java_lang_reflect_Constructor::compute_offsets() {
2874 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2875 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2876 }
2877
2878 #if INCLUDE_CDS
2879 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2880 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2881 }
2882 #endif
2883
2884 Handle java_lang_reflect_Constructor::create(TRAPS) {
2885 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2886 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2887 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2888 InstanceKlass* ik = InstanceKlass::cast(k);
2889 // Ensure it is initialized
2890 ik->initialize(CHECK_NH);
2891 return ik->allocate_instance_handle(THREAD);
2892 }
2893
2894 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2896 return reflect->obj_field(clazz_offset);
2897 }
2898
2899 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2900 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2901 reflect->obj_field_put(clazz_offset, value);
2902 }
2903
2904 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2905 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2906 return constructor->obj_field(parameterTypes_offset);
2907 }
2908
2909 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2911 constructor->obj_field_put(parameterTypes_offset, value);
2912 }
2913
2914 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2916 constructor->obj_field_put(exceptionTypes_offset, value);
2917 }
2918
2919 int java_lang_reflect_Constructor::slot(oop reflect) {
2920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2921 return reflect->int_field(slot_offset);
2922 }
2923
2924 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2926 reflect->int_field_put(slot_offset, value);
2927 }
2928
2929 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2931 constructor->int_field_put(modifiers_offset, value);
2932 }
2933
2934 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2935 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2936 constructor->obj_field_put(signature_offset, value);
2937 }
2938
2939 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2940 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2941 constructor->obj_field_put(annotations_offset, value);
2942 }
2943
2944 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2945 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2946 method->obj_field_put(parameter_annotations_offset, value);
2947 }
2948
2949 #define FIELD_FIELDS_DO(macro) \
2950 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2951 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2952 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
2953 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2954 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2955 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2956 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
2957
2958 void java_lang_reflect_Field::compute_offsets() {
2959 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
2960 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2961 }
2962
2963 #if INCLUDE_CDS
2964 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
2965 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2966 }
2967 #endif
2968
2969 Handle java_lang_reflect_Field::create(TRAPS) {
2970 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2971 Symbol* name = vmSymbols::java_lang_reflect_Field();
2972 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2973 InstanceKlass* ik = InstanceKlass::cast(k);
2974 // Ensure it is initialized
2975 ik->initialize(CHECK_NH);
2976 return ik->allocate_instance_handle(THREAD);
2977 }
2978
2979 oop java_lang_reflect_Field::clazz(oop reflect) {
2980 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2981 return reflect->obj_field(clazz_offset);
2982 }
2983
2984 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2985 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2986 reflect->obj_field_put(clazz_offset, value);
2987 }
2988
2989 oop java_lang_reflect_Field::name(oop field) {
2990 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2991 return field->obj_field(name_offset);
2992 }
2993
2994 void java_lang_reflect_Field::set_name(oop field, oop value) {
2995 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2996 field->obj_field_put(name_offset, value);
2997 }
2998
2999 oop java_lang_reflect_Field::type(oop field) {
3000 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3001 return field->obj_field(type_offset);
3002 }
3003
3004 void java_lang_reflect_Field::set_type(oop field, oop value) {
3005 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3006 field->obj_field_put(type_offset, value);
3007 }
3008
3009 int java_lang_reflect_Field::slot(oop reflect) {
3010 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3011 return reflect->int_field(slot_offset);
3012 }
3013
3014 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3015 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3016 reflect->int_field_put(slot_offset, value);
3017 }
3018
3019 int java_lang_reflect_Field::modifiers(oop field) {
3020 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3021 return field->int_field(modifiers_offset);
3022 }
3023
3024 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3025 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3026 field->int_field_put(modifiers_offset, value);
3027 }
3028
3029 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3030 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3031 field->obj_field_put(signature_offset, value);
3032 }
3033
3034 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3035 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3036 field->obj_field_put(annotations_offset, value);
3037 }
3038
3039 #define CONSTANTPOOL_FIELDS_DO(macro) \
3040 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3041
3042 void reflect_ConstantPool::compute_offsets() {
3043 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3044 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3045 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3046 }
3047
3048 #if INCLUDE_CDS
3049 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3050 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3051 }
3052 #endif
3053
3054 #define PARAMETER_FIELDS_DO(macro) \
3055 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3056 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3057 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3058 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3059
3060 void java_lang_reflect_Parameter::compute_offsets() {
3061 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3062 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3063 }
3064
3065 #if INCLUDE_CDS
3066 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3067 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3068 }
3069 #endif
3070
3071 Handle java_lang_reflect_Parameter::create(TRAPS) {
3072 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3073 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3074 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3075 InstanceKlass* ik = InstanceKlass::cast(k);
3076 // Ensure it is initialized
3077 ik->initialize(CHECK_NH);
3078 return ik->allocate_instance_handle(THREAD);
3079 }
3080
3081 oop java_lang_reflect_Parameter::name(oop param) {
3082 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3083 return param->obj_field(name_offset);
3084 }
3085
3086 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3087 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3088 param->obj_field_put(name_offset, value);
3089 }
3090
3091 int java_lang_reflect_Parameter::modifiers(oop param) {
3092 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3093 return param->int_field(modifiers_offset);
3094 }
3095
3096 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3097 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3098 param->int_field_put(modifiers_offset, value);
3099 }
3100
3101 int java_lang_reflect_Parameter::index(oop param) {
3102 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3103 return param->int_field(index_offset);
3104 }
3105
3106 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3107 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3108 param->int_field_put(index_offset, value);
3109 }
3110
3111 oop java_lang_reflect_Parameter::executable(oop param) {
3112 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3113 return param->obj_field(executable_offset);
3114 }
3115
3116 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3117 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3118 param->obj_field_put(executable_offset, value);
3119 }
3120
3121
3122 int java_lang_Module::loader_offset;
3123 int java_lang_Module::name_offset;
3124 int java_lang_Module::_module_entry_offset = -1;
3125
3126 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3127 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3128 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3129 vmSymbols::java_lang_module_init_signature(),
3130 loader, module_name, CHECK_NH);
3131 }
3132
3133 #define MODULE_FIELDS_DO(macro) \
3134 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3135 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3136
3137 void java_lang_Module::compute_offsets() {
3138 InstanceKlass* k = SystemDictionary::Module_klass();
3139 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3140 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3141 }
3142
3143 #if INCLUDE_CDS
3144 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3145 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3146 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3147 }
3148 #endif
3149
3150 oop java_lang_Module::loader(oop module) {
3151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3152 return module->obj_field(loader_offset);
3153 }
3154
3155 void java_lang_Module::set_loader(oop module, oop value) {
3156 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3157 module->obj_field_put(loader_offset, value);
3158 }
3159
3160 oop java_lang_Module::name(oop module) {
3161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3162 return module->obj_field(name_offset);
3163 }
3164
3165 void java_lang_Module::set_name(oop module, oop value) {
3166 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3167 module->obj_field_put(name_offset, value);
3168 }
3169
3170 ModuleEntry* java_lang_Module::module_entry(oop module) {
3171 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3172 assert(module != NULL, "module can't be null");
3173 assert(oopDesc::is_oop(module), "module must be oop");
3174
3175 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3176 if (module_entry == NULL) {
3177 // If the inject field containing the ModuleEntry* is null then return the
3178 // class loader's unnamed module.
3179 oop loader = java_lang_Module::loader(module);
3180 Handle h_loader = Handle(Thread::current(), loader);
3181 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3182 return loader_cld->unnamed_module();
3183 }
3184 return module_entry;
3185 }
3186
3187 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3188 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3189 assert(module != NULL, "module can't be null");
3190 assert(oopDesc::is_oop(module), "module must be oop");
3191 module->address_field_put(_module_entry_offset, (address)module_entry);
3192 }
3193
3194 Handle reflect_ConstantPool::create(TRAPS) {
3195 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3196 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3197 // Ensure it is initialized
3198 k->initialize(CHECK_NH);
3199 return k->allocate_instance_handle(THREAD);
3200 }
3201
3202
3203 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3204 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3205 oop mirror = value->pool_holder()->java_mirror();
3206 // Save the mirror to get back the constant pool.
3207 reflect->obj_field_put(_oop_offset, mirror);
3208 }
3209
3210 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3211 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3212
3213 oop mirror = reflect->obj_field(_oop_offset);
3214 Klass* k = java_lang_Class::as_Klass(mirror);
3215 assert(k->is_instance_klass(), "Must be");
3216
3217 // Get the constant pool back from the klass. Since class redefinition
3218 // merges the new constant pool into the old, this is essentially the
3219 // same constant pool as the original. If constant pool merging is
3220 // no longer done in the future, this will have to change to save
3221 // the original.
3222 return InstanceKlass::cast(k)->constants();
3223 }
3224
3225 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3226 macro(_base_offset, k, "base", object_signature, false)
3227
3228 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3229 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3230 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3231 }
3232
3233 #if INCLUDE_CDS
3234 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3235 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3236 }
3237 #endif
3238
3239 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3240 Klass* k = SystemDictionary::box_klass(type);
3241 if (k == NULL) return NULL;
3242 InstanceKlass* ik = InstanceKlass::cast(k);
3243 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3244 return ik->allocate_instance(THREAD);
3245 }
3246
3247
3248 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3249 oop box = initialize_and_allocate(type, CHECK_0);
3250 if (box == NULL) return NULL;
3251 switch (type) {
3252 case T_BOOLEAN:
3253 box->bool_field_put(value_offset, value->z);
3254 break;
3255 case T_CHAR:
3256 box->char_field_put(value_offset, value->c);
3257 break;
3258 case T_FLOAT:
3259 box->float_field_put(value_offset, value->f);
3260 break;
3261 case T_DOUBLE:
3262 box->double_field_put(long_value_offset, value->d);
3263 break;
3264 case T_BYTE:
3265 box->byte_field_put(value_offset, value->b);
3266 break;
3267 case T_SHORT:
3268 box->short_field_put(value_offset, value->s);
3269 break;
3270 case T_INT:
3271 box->int_field_put(value_offset, value->i);
3272 break;
3273 case T_LONG:
3274 box->long_field_put(long_value_offset, value->j);
3275 break;
3276 default:
3277 return NULL;
3278 }
3279 return box;
3280 }
3281
3282
3283 BasicType java_lang_boxing_object::basic_type(oop box) {
3284 if (box == NULL) return T_ILLEGAL;
3285 BasicType type = SystemDictionary::box_klass_type(box->klass());
3286 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3287 return T_ILLEGAL;
3288 return type;
3289 }
3290
3291
3292 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3293 BasicType type = SystemDictionary::box_klass_type(box->klass());
3294 switch (type) {
3295 case T_BOOLEAN:
3296 value->z = box->bool_field(value_offset);
3297 break;
3298 case T_CHAR:
3299 value->c = box->char_field(value_offset);
3300 break;
3301 case T_FLOAT:
3302 value->f = box->float_field(value_offset);
3303 break;
3304 case T_DOUBLE:
3305 value->d = box->double_field(long_value_offset);
3306 break;
3307 case T_BYTE:
3308 value->b = box->byte_field(value_offset);
3309 break;
3310 case T_SHORT:
3311 value->s = box->short_field(value_offset);
3312 break;
3313 case T_INT:
3314 value->i = box->int_field(value_offset);
3315 break;
3316 case T_LONG:
3317 value->j = box->long_field(long_value_offset);
3318 break;
3319 default:
3320 return T_ILLEGAL;
3321 } // end switch
3322 return type;
3323 }
3324
3325
3326 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3327 BasicType type = SystemDictionary::box_klass_type(box->klass());
3328 switch (type) {
3329 case T_BOOLEAN:
3330 box->bool_field_put(value_offset, value->z);
3331 break;
3332 case T_CHAR:
3333 box->char_field_put(value_offset, value->c);
3334 break;
3335 case T_FLOAT:
3336 box->float_field_put(value_offset, value->f);
3337 break;
3338 case T_DOUBLE:
3339 box->double_field_put(long_value_offset, value->d);
3340 break;
3341 case T_BYTE:
3342 box->byte_field_put(value_offset, value->b);
3343 break;
3344 case T_SHORT:
3345 box->short_field_put(value_offset, value->s);
3346 break;
3347 case T_INT:
3348 box->int_field_put(value_offset, value->i);
3349 break;
3350 case T_LONG:
3351 box->long_field_put(long_value_offset, value->j);
3352 break;
3353 default:
3354 return T_ILLEGAL;
3355 } // end switch
3356 return type;
3357 }
3358
3359
3360 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3361 switch (type) {
3362 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3363 case T_CHAR: st->print("%d", value->c); break;
3364 case T_BYTE: st->print("%d", value->b); break;
3365 case T_SHORT: st->print("%d", value->s); break;
3366 case T_INT: st->print("%d", value->i); break;
3367 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3368 case T_FLOAT: st->print("%f", value->f); break;
3369 case T_DOUBLE: st->print("%lf", value->d); break;
3370 default: st->print("type %d?", type); break;
3371 }
3372 }
3373
3374 // Support for java_lang_ref_Reference
3375
3376 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3377 assert(obj != NULL, "sanity");
3378 if (offset != java_lang_ref_Reference::referent_offset) {
3379 return false;
3380 }
3381
3382 Klass* k = obj->klass();
3383 if (!k->is_instance_klass()) {
3384 return false;
3385 }
3386
3387 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3388 bool is_reference = ik->reference_type() != REF_NONE;
3389 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3390 return is_reference;
3391 }
3392
3393 // Support for java_lang_ref_SoftReference
3394 //
3395
3396 #define SOFTREFERENCE_FIELDS_DO(macro) \
3397 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3398 macro(static_clock_offset, k, "clock", long_signature, true)
3399
3400 void java_lang_ref_SoftReference::compute_offsets() {
3401 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3402 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3403 }
3404
3405 #if INCLUDE_CDS
3406 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3407 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3408 }
3409 #endif
3410
3411 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3412 return ref->long_field(timestamp_offset);
3413 }
3414
3415 jlong java_lang_ref_SoftReference::clock() {
3416 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3417 oop base = ik->static_field_base_raw();
3418 return base->long_field(static_clock_offset);
3419 }
3420
3421 void java_lang_ref_SoftReference::set_clock(jlong value) {
3422 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3423 oop base = ik->static_field_base_raw();
3424 base->long_field_put(static_clock_offset, value);
3425 }
3426
3427 // Support for java_lang_invoke_DirectMethodHandle
3428
3429 int java_lang_invoke_DirectMethodHandle::_member_offset;
3430
3431 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3432 oop member_name = NULL;
3433 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3434 "a DirectMethodHandle oop is expected");
3435 return dmh->obj_field(member_offset_in_bytes());
3436 }
3437
3438 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3439 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3440
3441 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3442 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3443 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3444 }
3445
3446 #if INCLUDE_CDS
3447 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3448 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3449 }
3450 #endif
3451
3452 // Support for java_lang_invoke_MethodHandle
3453
3454 int java_lang_invoke_MethodHandle::_type_offset;
3455 int java_lang_invoke_MethodHandle::_form_offset;
3456
3457 int java_lang_invoke_MemberName::_clazz_offset;
3458 int java_lang_invoke_MemberName::_name_offset;
3459 int java_lang_invoke_MemberName::_type_offset;
3460 int java_lang_invoke_MemberName::_flags_offset;
3461 int java_lang_invoke_MemberName::_method_offset;
3462 int java_lang_invoke_MemberName::_vmindex_offset;
3463
3464 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3465 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3466
3467 int java_lang_invoke_LambdaForm::_vmentry_offset;
3468
3469 #define METHODHANDLE_FIELDS_DO(macro) \
3470 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3471 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3472
3473 void java_lang_invoke_MethodHandle::compute_offsets() {
3474 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3475 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3476 }
3477
3478 #if INCLUDE_CDS
3479 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3480 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3481 }
3482 #endif
3483
3484 #define MEMBERNAME_FIELDS_DO(macro) \
3485 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3486 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3487 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3488 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3489 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3490
3491 void java_lang_invoke_MemberName::compute_offsets() {
3492 InstanceKlass* k = SystemDictionary::MemberName_klass();
3493 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3494 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3495 }
3496
3497 #if INCLUDE_CDS
3498 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3499 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3500 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3501 }
3502 #endif
3503
3504 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3505 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3506 assert(k != NULL, "jdk mismatch");
3507 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3508 }
3509
3510 #if INCLUDE_CDS
3511 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3512 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3513 }
3514 #endif
3515
3516 #define LAMBDAFORM_FIELDS_DO(macro) \
3517 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3518
3519 void java_lang_invoke_LambdaForm::compute_offsets() {
3520 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3521 assert (k != NULL, "jdk mismatch");
3522 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3523 }
3524
3525 #if INCLUDE_CDS
3526 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3527 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3528 }
3529 #endif
3530
3531 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3532 return obj != NULL && is_subclass(obj->klass());
3533 }
3534
3535
3536 oop java_lang_invoke_MethodHandle::type(oop mh) {
3537 return mh->obj_field(_type_offset);
3538 }
3539
3540 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3541 mh->obj_field_put(_type_offset, mtype);
3542 }
3543
3544 oop java_lang_invoke_MethodHandle::form(oop mh) {
3545 assert(_form_offset != 0, "");
3546 return mh->obj_field(_form_offset);
3547 }
3548
3549 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3550 assert(_form_offset != 0, "");
3551 mh->obj_field_put(_form_offset, lform);
3552 }
3553
3554 /// MemberName accessors
3555
3556 oop java_lang_invoke_MemberName::clazz(oop mname) {
3557 assert(is_instance(mname), "wrong type");
3558 return mname->obj_field(_clazz_offset);
3559 }
3560
3561 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3562 assert(is_instance(mname), "wrong type");
3563 mname->obj_field_put(_clazz_offset, clazz);
3564 }
3565
3566 oop java_lang_invoke_MemberName::name(oop mname) {
3567 assert(is_instance(mname), "wrong type");
3568 return mname->obj_field(_name_offset);
3569 }
3570
3571 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3572 assert(is_instance(mname), "wrong type");
3573 mname->obj_field_put(_name_offset, name);
3574 }
3575
3576 oop java_lang_invoke_MemberName::type(oop mname) {
3577 assert(is_instance(mname), "wrong type");
3578 return mname->obj_field(_type_offset);
3579 }
3580
3581 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3582 assert(is_instance(mname), "wrong type");
3583 mname->obj_field_put(_type_offset, type);
3584 }
3585
3586 int java_lang_invoke_MemberName::flags(oop mname) {
3587 assert(is_instance(mname), "wrong type");
3588 return mname->int_field(_flags_offset);
3589 }
3590
3591 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3592 assert(is_instance(mname), "wrong type");
3593 mname->int_field_put(_flags_offset, flags);
3594 }
3595
3596
3597 // Return vmtarget from ResolvedMethodName method field through indirection
3598 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3599 assert(is_instance(mname), "wrong type");
3600 oop method = mname->obj_field(_method_offset);
3601 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3602 }
3603
3604 bool java_lang_invoke_MemberName::is_method(oop mname) {
3605 assert(is_instance(mname), "must be MemberName");
3606 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3607 }
3608
3609 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3610 assert(is_instance(mname), "wrong type");
3611 mname->obj_field_put(_method_offset, resolved_method);
3612 }
3613
3614 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3615 assert(is_instance(mname), "wrong type");
3616 return (intptr_t) mname->address_field(_vmindex_offset);
3617 }
3618
3619 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3620 assert(is_instance(mname), "wrong type");
3621 mname->address_field_put(_vmindex_offset, (address) index);
3622 }
3623
3624
3625 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3626 assert(is_instance(resolved_method), "wrong type");
3627 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3628 assert(m->is_method(), "must be");
3629 return m;
3630 }
3631
3632 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3633 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3634 assert(is_instance(resolved_method), "wrong type");
3635 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3636 }
3637
3638 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3639 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3640 oop resolved_method = ResolvedMethodTable::find_method(m());
3641 if (resolved_method == NULL) {
3642 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3643 if (!k->is_initialized()) {
3644 k->initialize(CHECK_NULL);
3645 }
3646 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3647 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3648 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3649 // distinct loaders) to ensure the metadata is kept alive.
3650 // This mirror may be different than the one in clazz field.
3651 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3652 resolved_method = ResolvedMethodTable::add_method(m, Handle(THREAD, new_resolved_method));
3653 }
3654 return resolved_method;
3655 }
3656
3657 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3658 assert(is_instance(lform), "wrong type");
3659 return lform->obj_field(_vmentry_offset);
3660 }
3661
3662
3663 // Support for java_lang_invoke_MethodType
3664
3665 int java_lang_invoke_MethodType::_rtype_offset;
3666 int java_lang_invoke_MethodType::_ptypes_offset;
3667
3668 #define METHODTYPE_FIELDS_DO(macro) \
3669 macro(_rtype_offset, k, "rtype", class_signature, false); \
3670 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3671
3672 void java_lang_invoke_MethodType::compute_offsets() {
3673 InstanceKlass* k = SystemDictionary::MethodType_klass();
3674 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3675 }
3676
3677 #if INCLUDE_CDS
3678 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3679 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3680 }
3681 #endif
3682
3683 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3684 st->print("(");
3685 objArrayOop pts = ptypes(mt);
3686 for (int i = 0, limit = pts->length(); i < limit; i++) {
3687 java_lang_Class::print_signature(pts->obj_at(i), st);
3688 }
3689 st->print(")");
3690 java_lang_Class::print_signature(rtype(mt), st);
3691 }
3692
3693 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3694 ResourceMark rm;
3695 stringStream buffer(128);
3696 print_signature(mt, &buffer);
3697 const char* sigstr = buffer.base();
3698 int siglen = (int) buffer.size();
3699 Symbol *name;
3700 if (!intern_if_not_found) {
3701 name = SymbolTable::probe(sigstr, siglen);
3702 } else {
3703 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3704 }
3705 return name;
3706 }
3707
3708 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3709 if (oopDesc::equals(mt1, mt2))
3710 return true;
3711 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3712 return false;
3713 if (ptype_count(mt1) != ptype_count(mt2))
3714 return false;
3715 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3716 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3717 return false;
3718 }
3719 return true;
3720 }
3721
3722 oop java_lang_invoke_MethodType::rtype(oop mt) {
3723 assert(is_instance(mt), "must be a MethodType");
3724 return mt->obj_field(_rtype_offset);
3725 }
3726
3727 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3728 assert(is_instance(mt), "must be a MethodType");
3729 return (objArrayOop) mt->obj_field(_ptypes_offset);
3730 }
3731
3732 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3733 return ptypes(mt)->obj_at(idx);
3734 }
3735
3736 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3737 return ptypes(mt)->length();
3738 }
3739
3740 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3741 objArrayOop pts = ptypes(mt);
3742 int count = pts->length();
3743 int slots = 0;
3744 for (int i = 0; i < count; i++) {
3745 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3746 slots += type2size[bt];
3747 }
3748 return slots;
3749 }
3750
3751 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3752 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3753 return type2size[bt];
3754 }
3755
3756
3757 // Support for java_lang_invoke_CallSite
3758
3759 int java_lang_invoke_CallSite::_target_offset;
3760 int java_lang_invoke_CallSite::_context_offset;
3761
3762 #define CALLSITE_FIELDS_DO(macro) \
3763 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3764 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3765
3766 void java_lang_invoke_CallSite::compute_offsets() {
3767 InstanceKlass* k = SystemDictionary::CallSite_klass();
3768 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3769 }
3770
3771 #if INCLUDE_CDS
3772 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3773 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3774 }
3775 #endif
3776
3777 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3778 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3779
3780 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3781 return dep_oop;
3782 }
3783
3784 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3785
3786 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3787 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3788
3789 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3790 InstanceKlass* k = SystemDictionary::Context_klass();
3791 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3792 }
3793
3794 #if INCLUDE_CDS
3795 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3796 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3797 }
3798 #endif
3799
3800 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3801 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3802 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3803 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3804 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3805 return dep_ctx;
3806 }
3807
3808 // Support for java_security_AccessControlContext
3809
3810 int java_security_AccessControlContext::_context_offset = 0;
3811 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3812 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3813 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3814
3815 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3816 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3817 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3818 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3819 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3820
3821 void java_security_AccessControlContext::compute_offsets() {
3822 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3823 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3824 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3825 }
3826
3827 #if INCLUDE_CDS
3828 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3829 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3830 }
3831 #endif
3832
3833 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3834 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3835 // Ensure klass is initialized
3836 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3837 // Allocate result
3838 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3839 // Fill in values
3840 result->obj_field_put(_context_offset, context());
3841 result->obj_field_put(_privilegedContext_offset, privileged_context());
3842 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3843 // whitelist AccessControlContexts created by the JVM if present
3844 if (_isAuthorized_offset != -1) {
3845 result->bool_field_put(_isAuthorized_offset, true);
3846 }
3847 return result;
3848 }
3849
3850
3851 // Support for java_lang_ClassLoader
3852
3853 bool java_lang_ClassLoader::offsets_computed = false;
3854 int java_lang_ClassLoader::_loader_data_offset = -1;
3855 int java_lang_ClassLoader::parallelCapable_offset = -1;
3856 int java_lang_ClassLoader::name_offset = -1;
3857 int java_lang_ClassLoader::nameAndId_offset = -1;
3858 int java_lang_ClassLoader::unnamedModule_offset = -1;
3859
3860 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3861 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3862 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3863 }
3864
3865 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3866 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3867 return RawAccess<>::load_at(loader, _loader_data_offset);
3868 }
3869
3870 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3871 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3872 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3873 }
3874
3875 #define CLASSLOADER_FIELDS_DO(macro) \
3876 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3877 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3878 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3879 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3880 macro(parent_offset, k1, "parent", classloader_signature, false)
3881
3882 void java_lang_ClassLoader::compute_offsets() {
3883 assert(!offsets_computed, "offsets should be initialized only once");
3884 offsets_computed = true;
3885
3886 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3887 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3888
3889 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3890 }
3891
3892 #if INCLUDE_CDS
3893 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3894 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3895 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3896 }
3897 #endif
3898
3899 oop java_lang_ClassLoader::parent(oop loader) {
3900 assert(is_instance(loader), "loader must be oop");
3901 return loader->obj_field(parent_offset);
3902 }
3903
3904 // Returns the name field of this class loader. If the name field has not
3905 // been set, null will be returned.
3906 oop java_lang_ClassLoader::name(oop loader) {
3907 assert(is_instance(loader), "loader must be oop");
3908 return loader->obj_field(name_offset);
3909 }
3910
3911 // Returns the nameAndId field of this class loader. The format is
3912 // as follows:
3913 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
3914 // If the defining loader has no name then <qualified-class-name> @<id>
3915 // If built-in loader, then omit '@<id>' as there is only one instance.
3916 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
3917 oop java_lang_ClassLoader::nameAndId(oop loader) {
3918 assert(is_instance(loader), "loader must be oop");
3919 return loader->obj_field(nameAndId_offset);
3920 }
3921
3922 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3923 assert(is_instance(loader), "loader must be oop");
3924 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3925 oop acl = loader;
3926 debug_only(jint loop_count = 0);
3927 // This loop taken verbatim from ClassLoader.java:
3928 do {
3929 acl = parent(acl);
3930 if (oopDesc::equals(cl, acl)) {
3931 return true;
3932 }
3933 assert(++loop_count > 0, "loop_count overflow");
3934 } while (acl != NULL);
3935 return false;
3936 }
3937
3938 bool java_lang_ClassLoader::is_instance(oop obj) {
3939 return obj != NULL && is_subclass(obj->klass());
3940 }
3941
3942
3943 // For class loader classes, parallelCapable defined
3944 // based on non-null field
3945 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3946 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3947 if (parallelCapable_offset == -1) {
3948 // Default for backward compatibility is false
3949 return false;
3950 }
3951 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3952 }
3953
3954 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3955 // Fix for 4474172; see evaluation for more details
3956 loader = non_reflection_class_loader(loader);
3957
3958 oop cl = SystemDictionary::java_system_loader();
3959 while(cl != NULL) {
3960 if (oopDesc::equals(cl, loader)) return true;
3961 cl = parent(cl);
3962 }
3963 return false;
3964 }
3965
3966 // Return true if this is one of the class loaders associated with
3967 // the generated bytecodes for reflection.
3968 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3969 if (loader != NULL) {
3970 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3971 // This might be null in non-1.4 JDKs
3972 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3973 }
3974 return false;
3975 }
3976
3977 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3978 // See whether this is one of the class loaders associated with
3979 // the generated bytecodes for reflection, and if so, "magically"
3980 // delegate to its parent to prevent class loading from occurring
3981 // in places where applications using reflection didn't expect it.
3982 if (is_reflection_class_loader(loader)) {
3983 return parent(loader);
3984 }
3985 return loader;
3986 }
3987
3988 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3989 assert(is_instance(loader), "loader must be oop");
3990 return loader->obj_field(unnamedModule_offset);
3991 }
3992
3993 // Support for java_lang_System
3994 //
3995 #define SYSTEM_FIELDS_DO(macro) \
3996 macro(static_in_offset, k, "in", input_stream_signature, true); \
3997 macro(static_out_offset, k, "out", print_stream_signature, true); \
3998 macro(static_err_offset, k, "err", print_stream_signature, true); \
3999 macro(static_security_offset, k, "security", security_manager_signature, true)
4000
4001 void java_lang_System::compute_offsets() {
4002 InstanceKlass* k = SystemDictionary::System_klass();
4003 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4004 }
4005
4006 #if INCLUDE_CDS
4007 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4008 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4009 }
4010 #endif
4011
4012 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4013 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4014 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4015
4016 // Support for jdk_internal_misc_UnsafeConstants
4017 //
4018 class UnsafeConstantsFixup : public FieldClosure {
4019 private:
4020 int _address_size;
4021 int _page_size;
4022 bool _big_endian;
4023 bool _use_unaligned_access;
4024 public:
4025 UnsafeConstantsFixup() {
4026 // round up values for all static final fields
4027 _address_size = sizeof(void*);
4028 _page_size = os::vm_page_size();
4029 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4030 _use_unaligned_access = UseUnalignedAccesses;
4031 }
4032
4033 void do_field(fieldDescriptor* fd) {
4034 oop mirror = fd->field_holder()->java_mirror();
4035 assert(mirror != NULL, "UnsafeConstants must have mirror already");
4036 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4037 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4038 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4039 if (fd->name() == vmSymbols::address_size_name()) {
4040 mirror->int_field_put(fd->offset(), _address_size);
4041 } else if (fd->name() == vmSymbols::page_size_name()) {
4042 mirror->int_field_put(fd->offset(), _page_size);
4043 } else if (fd->name() == vmSymbols::big_endian_name()) {
4044 mirror->bool_field_put(fd->offset(), _big_endian);
4045 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4046 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4047 } else {
4048 assert(false, "unexpected UnsafeConstants field");
4049 }
4050 }
4051 };
4052
4053 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4054 UnsafeConstantsFixup fixup;
4055 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4056 }
4057
4058 int java_lang_Class::_klass_offset;
4059 int java_lang_Class::_array_klass_offset;
4060 int java_lang_Class::_oop_size_offset;
4061 int java_lang_Class::_static_oop_field_count_offset;
4062 int java_lang_Class::_class_loader_offset;
4063 int java_lang_Class::_module_offset;
4064 int java_lang_Class::_protection_domain_offset;
4065 int java_lang_Class::_component_mirror_offset;
4066 int java_lang_Class::_init_lock_offset;
4067 int java_lang_Class::_signers_offset;
4068 int java_lang_Class::_name_offset;
4069 int java_lang_Class::_source_file_offset;
4070 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4071 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4072 int java_lang_Throwable::backtrace_offset;
4073 int java_lang_Throwable::detailMessage_offset;
4074 int java_lang_Throwable::stackTrace_offset;
4075 int java_lang_Throwable::depth_offset;
4076 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4077 int java_lang_reflect_AccessibleObject::override_offset;
4078 int java_lang_reflect_Method::clazz_offset;
4079 int java_lang_reflect_Method::name_offset;
4080 int java_lang_reflect_Method::returnType_offset;
4081 int java_lang_reflect_Method::parameterTypes_offset;
4082 int java_lang_reflect_Method::exceptionTypes_offset;
4083 int java_lang_reflect_Method::slot_offset;
4084 int java_lang_reflect_Method::modifiers_offset;
4085 int java_lang_reflect_Method::signature_offset;
4086 int java_lang_reflect_Method::annotations_offset;
4087 int java_lang_reflect_Method::parameter_annotations_offset;
4088 int java_lang_reflect_Method::annotation_default_offset;
4089 int java_lang_reflect_Constructor::clazz_offset;
4090 int java_lang_reflect_Constructor::parameterTypes_offset;
4091 int java_lang_reflect_Constructor::exceptionTypes_offset;
4092 int java_lang_reflect_Constructor::slot_offset;
4093 int java_lang_reflect_Constructor::modifiers_offset;
4094 int java_lang_reflect_Constructor::signature_offset;
4095 int java_lang_reflect_Constructor::annotations_offset;
4096 int java_lang_reflect_Constructor::parameter_annotations_offset;
4097 int java_lang_reflect_Field::clazz_offset;
4098 int java_lang_reflect_Field::name_offset;
4099 int java_lang_reflect_Field::type_offset;
4100 int java_lang_reflect_Field::slot_offset;
4101 int java_lang_reflect_Field::modifiers_offset;
4102 int java_lang_reflect_Field::signature_offset;
4103 int java_lang_reflect_Field::annotations_offset;
4104 int java_lang_reflect_Parameter::name_offset;
4105 int java_lang_reflect_Parameter::modifiers_offset;
4106 int java_lang_reflect_Parameter::index_offset;
4107 int java_lang_reflect_Parameter::executable_offset;
4108 int java_lang_boxing_object::value_offset;
4109 int java_lang_boxing_object::long_value_offset;
4110 int java_lang_ref_Reference::referent_offset;
4111 int java_lang_ref_Reference::queue_offset;
4112 int java_lang_ref_Reference::next_offset;
4113 int java_lang_ref_Reference::discovered_offset;
4114 int java_lang_ref_SoftReference::timestamp_offset;
4115 int java_lang_ref_SoftReference::static_clock_offset;
4116 int java_lang_ClassLoader::parent_offset;
4117 int java_lang_System::static_in_offset;
4118 int java_lang_System::static_out_offset;
4119 int java_lang_System::static_err_offset;
4120 int java_lang_System::static_security_offset;
4121 int java_lang_StackTraceElement::methodName_offset;
4122 int java_lang_StackTraceElement::fileName_offset;
4123 int java_lang_StackTraceElement::lineNumber_offset;
4124 int java_lang_StackTraceElement::moduleName_offset;
4125 int java_lang_StackTraceElement::moduleVersion_offset;
4126 int java_lang_StackTraceElement::classLoaderName_offset;
4127 int java_lang_StackTraceElement::declaringClass_offset;
4128 int java_lang_StackTraceElement::declaringClassObject_offset;
4129 int java_lang_StackFrameInfo::_memberName_offset;
4130 int java_lang_StackFrameInfo::_bci_offset;
4131 int java_lang_StackFrameInfo::_version_offset;
4132 int java_lang_LiveStackFrameInfo::_monitors_offset;
4133 int java_lang_LiveStackFrameInfo::_locals_offset;
4134 int java_lang_LiveStackFrameInfo::_operands_offset;
4135 int java_lang_LiveStackFrameInfo::_mode_offset;
4136 int java_lang_AssertionStatusDirectives::classes_offset;
4137 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4138 int java_lang_AssertionStatusDirectives::packages_offset;
4139 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4140 int java_lang_AssertionStatusDirectives::deflt_offset;
4141 int java_nio_Buffer::_limit_offset;
4142 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4143 int reflect_ConstantPool::_oop_offset;
4144 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4145
4146
4147 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4148 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4149 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4150 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4151 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4152 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4153 macro(methodName_offset, k, "methodName", string_signature, false); \
4154 macro(fileName_offset, k, "fileName", string_signature, false); \
4155 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4156
4157 // Support for java_lang_StackTraceElement
4158 void java_lang_StackTraceElement::compute_offsets() {
4159 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4160 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4161 }
4162
4163 #if INCLUDE_CDS
4164 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4165 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4166 }
4167 #endif
4168
4169 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4170 element->obj_field_put(fileName_offset, value);
4171 }
4172
4173 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4174 element->obj_field_put(declaringClass_offset, value);
4175 }
4176
4177 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4178 element->obj_field_put(methodName_offset, value);
4179 }
4180
4181 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4182 element->int_field_put(lineNumber_offset, value);
4183 }
4184
4185 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4186 element->obj_field_put(moduleName_offset, value);
4187 }
4188
4189 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4190 element->obj_field_put(moduleVersion_offset, value);
4191 }
4192
4193 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4194 element->obj_field_put(classLoaderName_offset, value);
4195 }
4196
4197 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4198 element->obj_field_put(declaringClassObject_offset, value);
4199 }
4200
4201 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4202 element->short_field_put(_version_offset, value);
4203 }
4204
4205 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4206 element->int_field_put(_bci_offset, value);
4207 }
4208
4209 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4210 element->obj_field_put(_monitors_offset, value);
4211 }
4212
4213 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4214 element->obj_field_put(_locals_offset, value);
4215 }
4216
4217 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4218 element->obj_field_put(_operands_offset, value);
4219 }
4220
4221 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4222 element->int_field_put(_mode_offset, value);
4223 }
4224
4225 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4226 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4227 macro(classes_offset, k, "classes", string_array_signature, false); \
4228 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4229 macro(packages_offset, k, "packages", string_array_signature, false); \
4230 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4231 macro(deflt_offset, k, "deflt", bool_signature, false)
4232
4233 void java_lang_AssertionStatusDirectives::compute_offsets() {
4234 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4235 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4236 }
4237
4238 #if INCLUDE_CDS
4239 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4240 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4241 }
4242 #endif
4243
4244 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4245 o->obj_field_put(classes_offset, val);
4246 }
4247
4248 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4249 o->obj_field_put(classEnabled_offset, val);
4250 }
4251
4252 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4253 o->obj_field_put(packages_offset, val);
4254 }
4255
4256 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4257 o->obj_field_put(packageEnabled_offset, val);
4258 }
4259
4260 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4261 o->bool_field_put(deflt_offset, val);
4262 }
4263
4264
4265 // Support for intrinsification of java.nio.Buffer.checkIndex
4266 int java_nio_Buffer::limit_offset() {
4267 return _limit_offset;
4268 }
4269
4270 #define BUFFER_FIELDS_DO(macro) \
4271 macro(_limit_offset, k, "limit", int_signature, false)
4272
4273 void java_nio_Buffer::compute_offsets() {
4274 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4275 assert(k != NULL, "must be loaded in 1.4+");
4276 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4277 }
4278
4279 #if INCLUDE_CDS
4280 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4281 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4282 }
4283 #endif
4284
4285 #define AOS_FIELDS_DO(macro) \
4286 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4287
4288 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4289 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4290 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4291 }
4292
4293 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4294 assert(_owner_offset != 0, "Must be initialized");
4295 return obj->obj_field(_owner_offset);
4296 }
4297
4298 #if INCLUDE_CDS
4299 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4300 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4301 }
4302 #endif
4303
4304 static int member_offset(int hardcoded_offset) {
4305 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4306 }
4307
4308 // Compute hard-coded offsets
4309 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4310 // are not available to determine the offset_of_static_fields.
4311 void JavaClasses::compute_hard_coded_offsets() {
4312
4313 // java_lang_boxing_object
4314 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4315 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4316
4317 // java_lang_ref_Reference
4318 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4319 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4320 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4321 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4322 }
4323
4324 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4325
4326 // Compute non-hard-coded field offsets of all the classes in this file
4327 void JavaClasses::compute_offsets() {
4328 if (UseSharedSpaces) {
4329 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4330 JvmtiExport::has_early_class_hook_env()),
4331 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4332 // None of the classes used by the rest of this function can be replaced by
4333 // JMVTI ClassFileLoadHook.
4334 // We are safe to use the archived offsets, which have already been restored
4335 // by JavaClasses::serialize_offsets, without computing the offsets again.
4336 return;
4337 }
4338
4339 // We have already called the compute_offsets() of the
4340 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4341 // earlier inside SystemDictionary::resolve_well_known_classes()
4342 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4343
4344 // generated interpreter code wants to know about the offsets we just computed:
4345 AbstractAssembler::update_delayed_values();
4346 }
4347
4348 #if INCLUDE_CDS
4349 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4350
4351 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4352 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4353 }
4354 #endif
4355
4356
4357 #ifndef PRODUCT
4358
4359 // These functions exist to assert the validity of hard-coded field offsets to guard
4360 // against changes in the class files
4361
4362 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4363 EXCEPTION_MARK;
4364 fieldDescriptor fd;
4365 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4366 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4367 InstanceKlass* ik = InstanceKlass::cast(k);
4368 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4369 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4370 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4371 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4372 return false;
4373 }
4374 if (fd.is_static()) {
4375 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4376 return false;
4377 }
4378 if (fd.offset() == hardcoded_offset ) {
4379 return true;
4380 } else {
4381 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4382 klass_name, field_name, hardcoded_offset, fd.offset());
4383 return false;
4384 }
4385 }
4386
4387 // Check the hard-coded field offsets of all the classes in this file
4388
4389 void JavaClasses::check_offsets() {
4390 bool valid = true;
4391
4392 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4393 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4394
4395 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4396 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4397
4398 // Boxed primitive objects (java_lang_boxing_object)
4399
4400 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4401 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4402 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4403 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4404 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4405 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4406 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4407 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4408
4409 // java.lang.ref.Reference
4410
4411 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4412 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4413 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4414 // Fake field
4415 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4416
4417 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4418 }
4419
4420 #endif // PRODUCT
4421
4422 int InjectedField::compute_offset() {
4423 InstanceKlass* ik = InstanceKlass::cast(klass());
4424 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4425 if (!may_be_java && !fs.access_flags().is_internal()) {
4426 // Only look at injected fields
4427 continue;
4428 }
4429 if (fs.name() == name() && fs.signature() == signature()) {
4430 return fs.offset();
4431 }
4432 }
4433 ResourceMark rm;
4434 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)" : "");
4435 #ifndef PRODUCT
4436 ik->print();
4437 tty->print_cr("all fields:");
4438 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4439 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4440 }
4441 #endif //PRODUCT
4442 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4443 return -1;
4444 }
4445
4446 void javaClasses_init() {
4447 JavaClasses::compute_offsets();
4448 JavaClasses::check_offsets();
4449 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4450 }