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 "oops/valueArrayKlass.hpp"
54 #include "prims/jvmtiExport.hpp"
55 #include "prims/resolvedMethodTable.hpp"
56 #include "runtime/fieldDescriptor.inline.hpp"
57 #include "runtime/frame.inline.hpp"
58 #include "runtime/handles.inline.hpp"
59 #include "runtime/interfaceSupport.inline.hpp"
60 #include "runtime/java.hpp"
61 #include "runtime/javaCalls.hpp"
62 #include "runtime/jniHandles.inline.hpp"
63 #include "runtime/safepoint.hpp"
64 #include "runtime/safepointVerifiers.hpp"
65 #include "runtime/thread.inline.hpp"
66 #include "runtime/vframe.inline.hpp"
67 #include "utilities/align.hpp"
68 #include "utilities/preserveException.hpp"
69 #include "utilities/utf8.hpp"
70 #if INCLUDE_JVMCI
71 #include "jvmci/jvmciJavaClasses.hpp"
72 #endif
73
74 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
75 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
76
77 #if INCLUDE_CDS
78 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
79 f->do_u4((u4*)&_##name##_offset);
80 #endif
81
82 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
83 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
84
85 InjectedField JavaClasses::_injected_fields[] = {
86 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
87 };
88
89 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
90 return _injected_fields[id].compute_offset();
91 }
92
93 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
94 *field_count = 0;
95
96 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
97 if (sid == vmSymbols::NO_SID) {
98 // Only well known classes can inject fields
99 return NULL;
100 }
101
102 int count = 0;
103 int start = -1;
104
105 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
106 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
107 count++; \
108 if (start == -1) start = klass##_##name##_enum; \
109 }
110 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
111 #undef LOOKUP_INJECTED_FIELD
112
113 if (start != -1) {
114 *field_count = count;
115 return _injected_fields + start;
116 }
117 return NULL;
118 }
119
120
121 // Helpful routine for computing field offsets at run time rather than hardcoding them
122 // Finds local fields only, including static fields. Static field offsets are from the
123 // beginning of the mirror.
124 static void compute_offset(int &dest_offset,
125 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
126 bool is_static = false) {
127 fieldDescriptor fd;
128 if (ik == NULL) {
129 ResourceMark rm;
130 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
131 vm_exit_during_initialization("Invalid layout of well-known class");
132 }
133
134 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
135 ResourceMark rm;
136 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
137 name_symbol->as_C_string(), signature_symbol->as_C_string());
138 #ifndef PRODUCT
139 // Prints all fields and offsets
140 Log(class) lt;
141 LogStream ls(lt.error());
142 ik->print_on(&ls);
143 #endif //PRODUCT
144 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
145 }
146 dest_offset = fd.offset();
147 }
148
149 // Overloading to pass name as a string.
150 static void compute_offset(int& dest_offset, InstanceKlass* ik,
151 const char* name_string, Symbol* signature_symbol,
152 bool is_static = false) {
153 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
154 if (name == NULL) {
155 ResourceMark rm;
156 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
157 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
158 }
159 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
160 }
161
162 int java_lang_String::value_offset = 0;
163 int java_lang_String::hash_offset = 0;
164 int java_lang_String::hashIsZero_offset = 0;
165 int java_lang_String::coder_offset = 0;
166
167 bool java_lang_String::initialized = false;
168
169 bool java_lang_String::is_instance(oop obj) {
170 return is_instance_inlined(obj);
171 }
172
173 #if INCLUDE_CDS
174 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
175 f->do_u4((u4*)&offset)
176 #endif
177
178 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
179 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
180
181 #define STRING_FIELDS_DO(macro) \
182 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
183 macro(hash_offset, k, "hash", int_signature, false); \
184 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
185 macro(coder_offset, k, "coder", byte_signature, false);
186
187 void java_lang_String::compute_offsets() {
188 if (initialized) {
189 return;
190 }
191
192 InstanceKlass* k = SystemDictionary::String_klass();
193 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
194
195 initialized = true;
196 }
197
198 #if INCLUDE_CDS
199 void java_lang_String::serialize_offsets(SerializeClosure* f) {
200 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
201 f->do_u4((u4*)&initialized);
202 }
203 #endif
204
205 class CompactStringsFixup : public FieldClosure {
206 private:
207 bool _value;
208
209 public:
210 CompactStringsFixup(bool value) : _value(value) {}
211
212 void do_field(fieldDescriptor* fd) {
213 if (fd->name() == vmSymbols::compact_strings_name()) {
214 oop mirror = fd->field_holder()->java_mirror();
215 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
216 assert(mirror != NULL, "String must have mirror already");
217 mirror->bool_field_put(fd->offset(), _value);
218 }
219 }
220 };
221
222 void java_lang_String::set_compact_strings(bool value) {
223 CompactStringsFixup fix(value);
224 SystemDictionary::String_klass()->do_local_static_fields(&fix);
225 }
226
227 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
228 assert(initialized, "Must be initialized");
229 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
230
231 // Create the String object first, so there's a chance that the String
232 // and the char array it points to end up in the same cache line.
233 oop obj;
234 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
235
236 // Create the char array. The String object must be handlized here
237 // because GC can happen as a result of the allocation attempt.
238 Handle h_obj(THREAD, obj);
239 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
240 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
241
242 // Point the String at the char array
243 obj = h_obj();
244 set_value(obj, buffer);
245 // No need to zero the offset, allocation zero'ed the entire String object
246 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
247 return h_obj;
248 }
249
250 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
251 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
252 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
253 typeArrayOop buffer = value(h_obj());
254 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
255 if (is_latin1) {
256 for (int index = 0; index < length; index++) {
257 buffer->byte_at_put(index, (jbyte)unicode[index]);
258 }
259 } else {
260 for (int index = 0; index < length; index++) {
261 buffer->char_at_put(index, unicode[index]);
262 }
263 }
264
265 #ifdef ASSERT
266 {
267 ResourceMark rm;
268 char* expected = UNICODE::as_utf8(unicode, length);
269 char* actual = as_utf8_string(h_obj());
270 if (strcmp(expected, actual) != 0) {
271 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
272 ShouldNotReachHere();
273 }
274 }
275 #endif
276
277 return h_obj;
278 }
279
280 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
281 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
282 return h_obj();
283 }
284
285 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
286 if (utf8_str == NULL) {
287 return Handle();
288 }
289 bool has_multibyte, is_latin1;
290 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
291 if (!CompactStrings) {
292 has_multibyte = true;
293 is_latin1 = false;
294 }
295
296 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
297 if (length > 0) {
298 if (!has_multibyte) {
299 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
300 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
301 } else if (is_latin1) {
302 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
303 } else {
304 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
305 }
306 }
307
308 #ifdef ASSERT
309 // This check is too strict because the input string is not necessarily valid UTF8.
310 // For example, it may be created with arbitrary content via jni_NewStringUTF.
311 /*
312 {
313 ResourceMark rm;
314 const char* expected = utf8_str;
315 char* actual = as_utf8_string(h_obj());
316 if (strcmp(expected, actual) != 0) {
317 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
318 ShouldNotReachHere();
319 }
320 }
321 */
322 #endif
323
324 return h_obj;
325 }
326
327 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
328 Handle h_obj = create_from_str(utf8_str, CHECK_0);
329 return h_obj();
330 }
331
332 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
333 const char* utf8_str = (char*)symbol->bytes();
334 int utf8_len = symbol->utf8_length();
335
336 bool has_multibyte, is_latin1;
337 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
338 if (!CompactStrings) {
339 has_multibyte = true;
340 is_latin1 = false;
341 }
342
343 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
344 if (length > 0) {
345 if (!has_multibyte) {
346 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
347 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
348 } else if (is_latin1) {
349 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
350 } else {
351 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
352 }
353 }
354
355 #ifdef ASSERT
356 {
357 ResourceMark rm;
358 const char* expected = symbol->as_utf8();
359 char* actual = as_utf8_string(h_obj());
360 if (strncmp(expected, actual, utf8_len) != 0) {
361 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
362 ShouldNotReachHere();
363 }
364 }
365 #endif
366
367 return h_obj;
368 }
369
370 // Converts a C string to a Java String based on current encoding
371 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
372 assert(str != NULL, "bad arguments");
373
374 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
375 static to_java_string_fn_t _to_java_string_fn = NULL;
376
377 if (_to_java_string_fn == NULL) {
378 void *lib_handle = os::native_java_library();
379 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
380 if (_to_java_string_fn == NULL) {
381 fatal("NewStringPlatform missing");
382 }
383 }
384
385 jstring js = NULL;
386 { JavaThread* thread = (JavaThread*)THREAD;
387 assert(thread->is_Java_thread(), "must be java thread");
388 HandleMark hm(thread);
389 ThreadToNativeFromVM ttn(thread);
390 js = (_to_java_string_fn)(thread->jni_environment(), str);
391 }
392 return Handle(THREAD, JNIHandles::resolve(js));
393 }
394
395 // Converts a Java String to a native C string that can be used for
396 // native OS calls.
397 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
398 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
399 static to_platform_string_fn_t _to_platform_string_fn = NULL;
400
401 if (_to_platform_string_fn == NULL) {
402 void *lib_handle = os::native_java_library();
403 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
404 if (_to_platform_string_fn == NULL) {
405 fatal("GetStringPlatformChars missing");
406 }
407 }
408
409 char *native_platform_string;
410 { JavaThread* thread = (JavaThread*)THREAD;
411 assert(thread->is_Java_thread(), "must be java thread");
412 JNIEnv *env = thread->jni_environment();
413 jstring js = (jstring) JNIHandles::make_local(env, java_string());
414 bool is_copy;
415 HandleMark hm(thread);
416 ThreadToNativeFromVM ttn(thread);
417 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
418 assert(is_copy == JNI_TRUE, "is_copy value changed");
419 JNIHandles::destroy_local(js);
420 }
421 return native_platform_string;
422 }
423
424 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
425 oop obj = java_string();
426 // Typical usage is to convert all '/' to '.' in string.
427 typeArrayOop value = java_lang_String::value(obj);
428 int length = java_lang_String::length(obj, value);
429 bool is_latin1 = java_lang_String::is_latin1(obj);
430
431 // First check if any from_char exist
432 int index; // Declared outside, used later
433 for (index = 0; index < length; index++) {
434 jchar c = !is_latin1 ? value->char_at(index) :
435 ((jchar) value->byte_at(index)) & 0xff;
436 if (c == from_char) {
437 break;
438 }
439 }
440 if (index == length) {
441 // No from_char, so do not copy.
442 return java_string;
443 }
444
445 // Check if result string will be latin1
446 bool to_is_latin1 = false;
447
448 // Replacement char must be latin1
449 if (CompactStrings && UNICODE::is_latin1(to_char)) {
450 if (is_latin1) {
451 // Source string is latin1 as well
452 to_is_latin1 = true;
453 } else if (!UNICODE::is_latin1(from_char)) {
454 // We are replacing an UTF16 char. Scan string to
455 // check if result can be latin1 encoded.
456 to_is_latin1 = true;
457 for (index = 0; index < length; index++) {
458 jchar c = value->char_at(index);
459 if (c != from_char && !UNICODE::is_latin1(c)) {
460 to_is_latin1 = false;
461 break;
462 }
463 }
464 }
465 }
466
467 // Create new UNICODE (or byte) buffer. Must handlize value because GC
468 // may happen during String and char array creation.
469 typeArrayHandle h_value(THREAD, value);
470 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
471 typeArrayOop from_buffer = h_value();
472 typeArrayOop to_buffer = java_lang_String::value(string());
473
474 // Copy contents
475 for (index = 0; index < length; index++) {
476 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
477 ((jchar) from_buffer->byte_at(index)) & 0xff;
478 if (c == from_char) {
479 c = to_char;
480 }
481 if (!to_is_latin1) {
482 to_buffer->char_at_put(index, c);
483 } else {
484 to_buffer->byte_at_put(index, (jbyte) c);
485 }
486 }
487 return string;
488 }
489
490 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
491 typeArrayOop value = java_lang_String::value(java_string);
492 length = java_lang_String::length(java_string, value);
493 bool is_latin1 = java_lang_String::is_latin1(java_string);
494
495 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
496 if (result != NULL) {
497 if (!is_latin1) {
498 for (int index = 0; index < length; index++) {
499 result[index] = value->char_at(index);
500 }
501 } else {
502 for (int index = 0; index < length; index++) {
503 result[index] = ((jchar) value->byte_at(index)) & 0xff;
504 }
505 }
506 } else {
507 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
508 }
509 return result;
510 }
511
512 unsigned int java_lang_String::hash_code(oop java_string) {
513 // The hash and hashIsZero fields are subject to a benign data race,
514 // making it crucial to ensure that any observable result of the
515 // calculation in this method stays correct under any possible read of
516 // these fields. Necessary restrictions to allow this to be correct
517 // without explicit memory fences or similar concurrency primitives is
518 // that we can ever only write to one of these two fields for a given
519 // String instance, and that the computation is idempotent and derived
520 // from immutable state
521 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized");
522 if (java_lang_String::hash_is_set(java_string)) {
523 return java_string->int_field(hash_offset);
524 }
525
526 typeArrayOop value = java_lang_String::value(java_string);
527 int length = java_lang_String::length(java_string, value);
528 bool is_latin1 = java_lang_String::is_latin1(java_string);
529
530 unsigned int hash = 0;
531 if (length > 0) {
532 if (is_latin1) {
533 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
534 } else {
535 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
536 }
537 }
538
539 if (hash != 0) {
540 java_string->int_field_put(hash_offset, hash);
541 } else {
542 java_string->bool_field_put(hashIsZero_offset, true);
543 }
544 return hash;
545 }
546
547 char* java_lang_String::as_quoted_ascii(oop java_string) {
548 typeArrayOop value = java_lang_String::value(java_string);
549 int length = java_lang_String::length(java_string, value);
550 bool is_latin1 = java_lang_String::is_latin1(java_string);
551
552 if (length == 0) return NULL;
553
554 char* result;
555 int result_length;
556 if (!is_latin1) {
557 jchar* base = value->char_at_addr(0);
558 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
559 result = NEW_RESOURCE_ARRAY(char, result_length);
560 UNICODE::as_quoted_ascii(base, length, result, result_length);
561 } else {
562 jbyte* base = value->byte_at_addr(0);
563 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
564 result = NEW_RESOURCE_ARRAY(char, result_length);
565 UNICODE::as_quoted_ascii(base, length, result, result_length);
566 }
567 assert(result_length >= length + 1, "must not be shorter");
568 assert(result_length == (int)strlen(result) + 1, "must match");
569 return result;
570 }
571
572 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
573 typeArrayOop value = java_lang_String::value(java_string);
574 int length = java_lang_String::length(java_string, value);
575 bool is_latin1 = java_lang_String::is_latin1(java_string);
576 if (!is_latin1) {
577 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
578 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
579 return sym;
580 } else {
581 ResourceMark rm;
582 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
583 const char* base = UNICODE::as_utf8(position, length);
584 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
585 return sym;
586 }
587 }
588
589 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
590 typeArrayOop value = java_lang_String::value(java_string);
591 int length = java_lang_String::length(java_string, value);
592 bool is_latin1 = java_lang_String::is_latin1(java_string);
593 if (!is_latin1) {
594 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
595 return SymbolTable::probe_unicode(base, length);
596 } else {
597 ResourceMark rm;
598 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
599 const char* base = UNICODE::as_utf8(position, length);
600 return SymbolTable::probe(base, length);
601 }
602 }
603
604 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
605 assert(value_equals(value, java_lang_String::value(java_string)),
606 "value must be same as java_lang_String::value(java_string)");
607 int length = java_lang_String::length(java_string, value);
608 if (length == 0) {
609 return 0;
610 }
611 if (!java_lang_String::is_latin1(java_string)) {
612 return UNICODE::utf8_length(value->char_at_addr(0), length);
613 } else {
614 return UNICODE::utf8_length(value->byte_at_addr(0), length);
615 }
616 }
617
618 int java_lang_String::utf8_length(oop java_string) {
619 typeArrayOop value = java_lang_String::value(java_string);
620 return utf8_length(java_string, value);
621 }
622
623 char* java_lang_String::as_utf8_string(oop java_string) {
624 typeArrayOop value = java_lang_String::value(java_string);
625 int length = java_lang_String::length(java_string, value);
626 bool is_latin1 = java_lang_String::is_latin1(java_string);
627 if (!is_latin1) {
628 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
629 return UNICODE::as_utf8(position, length);
630 } else {
631 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
632 return UNICODE::as_utf8(position, length);
633 }
634 }
635
636 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
637 assert(value_equals(value, java_lang_String::value(java_string)),
638 "value must be same as java_lang_String::value(java_string)");
639 int length = java_lang_String::length(java_string, value);
640 bool is_latin1 = java_lang_String::is_latin1(java_string);
641 if (!is_latin1) {
642 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
643 return UNICODE::as_utf8(position, length, buf, buflen);
644 } else {
645 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
646 return UNICODE::as_utf8(position, length, buf, buflen);
647 }
648 }
649
650 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
651 typeArrayOop value = java_lang_String::value(java_string);
652 return as_utf8_string(java_string, value, buf, buflen);
653 }
654
655 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
656 typeArrayOop value = java_lang_String::value(java_string);
657 bool is_latin1 = java_lang_String::is_latin1(java_string);
658 assert(start + len <= java_lang_String::length(java_string), "just checking");
659 if (!is_latin1) {
660 jchar* position = value->char_at_addr(start);
661 return UNICODE::as_utf8(position, len);
662 } else {
663 jbyte* position = value->byte_at_addr(start);
664 return UNICODE::as_utf8(position, len);
665 }
666 }
667
668 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
669 assert(value_equals(value, java_lang_String::value(java_string)),
670 "value must be same as java_lang_String::value(java_string)");
671 assert(start + len <= java_lang_String::length(java_string), "just checking");
672 bool is_latin1 = java_lang_String::is_latin1(java_string);
673 if (!is_latin1) {
674 jchar* position = value->char_at_addr(start);
675 return UNICODE::as_utf8(position, len, buf, buflen);
676 } else {
677 jbyte* position = value->byte_at_addr(start);
678 return UNICODE::as_utf8(position, len, buf, buflen);
679 }
680 }
681
682 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
683 assert(java_string->klass() == SystemDictionary::String_klass(),
684 "must be java_string");
685 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
686 int length = java_lang_String::length(java_string, value);
687 if (length != len) {
688 return false;
689 }
690 bool is_latin1 = java_lang_String::is_latin1(java_string);
691 if (!is_latin1) {
692 for (int i = 0; i < len; i++) {
693 if (value->char_at(i) != chars[i]) {
694 return false;
695 }
696 }
697 } else {
698 for (int i = 0; i < len; i++) {
699 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
700 return false;
701 }
702 }
703 }
704 return true;
705 }
706
707 bool java_lang_String::equals(oop str1, oop str2) {
708 assert(str1->klass() == SystemDictionary::String_klass(),
709 "must be java String");
710 assert(str2->klass() == SystemDictionary::String_klass(),
711 "must be java String");
712 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
713 bool is_latin1 = java_lang_String::is_latin1(str1);
714 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
715 bool is_latin2 = java_lang_String::is_latin1(str2);
716
717 if (is_latin1 != is_latin2) {
718 // Strings with different coders are never equal.
719 return false;
720 }
721 return value_equals(value1, value2);
722 }
723
724 void java_lang_String::print(oop java_string, outputStream* st) {
725 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
726 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
727
728 if (value == NULL) {
729 // This can happen if, e.g., printing a String
730 // object before its initializer has been called
731 st->print("NULL");
732 return;
733 }
734
735 int length = java_lang_String::length(java_string, value);
736 bool is_latin1 = java_lang_String::is_latin1(java_string);
737
738 st->print("\"");
739 for (int index = 0; index < length; index++) {
740 st->print("%c", (!is_latin1) ? value->char_at(index) :
741 ((jchar) value->byte_at(index)) & 0xff );
742 }
743 st->print("\"");
744 }
745
746
747 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
748 assert(mirror.not_null() && fd->is_static(), "just checking");
749 if (fd->has_initial_value()) {
750 BasicType t = fd->field_type();
751 switch (t) {
752 case T_BYTE:
753 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
754 break;
755 case T_BOOLEAN:
756 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
757 break;
758 case T_CHAR:
759 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
760 break;
761 case T_SHORT:
762 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
763 break;
764 case T_INT:
765 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
766 break;
767 case T_FLOAT:
768 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
769 break;
770 case T_DOUBLE:
771 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
772 break;
773 case T_LONG:
774 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
775 break;
776 case T_OBJECT:
777 {
778 assert(fd->signature() == vmSymbols::string_signature(),
779 "just checking");
780 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
781 // Archive the String field and update the pointer.
782 oop s = mirror()->obj_field(fd->offset());
783 oop archived_s = StringTable::create_archived_string(s, CHECK);
784 mirror()->obj_field_put(fd->offset(), archived_s);
785 } else {
786 oop string = fd->string_initial_value(CHECK);
787 mirror()->obj_field_put(fd->offset(), string);
788 }
789 }
790 break;
791 default:
792 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
793 "Illegal ConstantValue attribute in class file");
794 }
795 }
796 }
797
798
799 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
800 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
801
802 // If the offset was read from the shared archive, it was fixed up already
803 if (!k->is_shared()) {
804 if (k->is_instance_klass()) {
805 // During bootstrap, java.lang.Class wasn't loaded so static field
806 // offsets were computed without the size added it. Go back and
807 // update all the static field offsets to included the size.
808 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
809 if (fs.access_flags().is_static()) {
810 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
811 fs.set_offset(real_offset);
812 }
813 }
814 }
815 }
816
817 if (k->is_shared() && k->has_raw_archived_mirror()) {
818 if (HeapShared::open_archive_heap_region_mapped()) {
819 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
820 assert(present, "Missing archived mirror for %s", k->external_name());
821 return;
822 } else {
823 k->set_java_mirror_handle(NULL);
824 k->clear_has_raw_archived_mirror();
825 }
826 }
827 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
828 }
829
830 void java_lang_Class::initialize_mirror_fields(Klass* k,
831 Handle mirror,
832 Handle protection_domain,
833 TRAPS) {
834 // Allocate a simple java object for a lock.
835 // This needs to be a java object because during class initialization
836 // it can be held across a java call.
837 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
838 set_init_lock(mirror(), r);
839
840 // Set protection domain also
841 set_protection_domain(mirror(), protection_domain());
842
843 // Initialize static fields
844 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
845 }
846
847 // Set the java.lang.Module module field in the java_lang_Class mirror
848 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
849 if (module.is_null()) {
850 // During startup, the module may be NULL only if java.base has not been defined yet.
851 // Put the class on the fixup_module_list to patch later when the java.lang.Module
852 // for java.base is known. But note that since we captured the NULL module another
853 // thread may have completed that initialization.
854
855 bool javabase_was_defined = false;
856 {
857 MutexLocker m1(Module_lock, THREAD);
858 // Keep list of classes needing java.base module fixup
859 if (!ModuleEntryTable::javabase_defined()) {
860 assert(k->java_mirror() != NULL, "Class's mirror is null");
861 k->class_loader_data()->inc_keep_alive();
862 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
863 fixup_module_field_list()->push(k);
864 } else {
865 javabase_was_defined = true;
866 }
867 }
868
869 // If java.base was already defined then patch this particular class with java.base.
870 if (javabase_was_defined) {
871 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
872 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
873 "Setting class module field, " JAVA_BASE_NAME " should be defined");
874 Handle javabase_handle(THREAD, javabase_entry->module());
875 set_module(mirror(), javabase_handle());
876 }
877 } else {
878 assert(Universe::is_module_initialized() ||
879 (ModuleEntryTable::javabase_defined() &&
880 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
881 "Incorrect java.lang.Module specification while creating mirror");
882 set_module(mirror(), module());
883 }
884 }
885
886 // Statically allocate fixup lists because they always get created.
887 void java_lang_Class::allocate_fixup_lists() {
888 GrowableArray<Klass*>* mirror_list =
889 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
890 set_fixup_mirror_list(mirror_list);
891
892 GrowableArray<Klass*>* module_list =
893 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
894 set_fixup_module_field_list(module_list);
895 }
896
897 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
898 Handle module, Handle protection_domain, TRAPS) {
899 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
900 assert(k->java_mirror() == NULL, "should only assign mirror once");
901
902 // Use this moment of initialization to cache modifier_flags also,
903 // to support Class.getModifiers(). Instance classes recalculate
904 // the cached flags after the class file is parsed, but before the
905 // class is put into the system dictionary.
906 int computed_modifiers = k->compute_modifier_flags(CHECK);
907 k->set_modifier_flags(computed_modifiers);
908 // Class_klass has to be loaded because it is used to allocate
909 // the mirror.
910 if (SystemDictionary::Class_klass_loaded()) {
911 // Allocate mirror (java.lang.Class instance)
912 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
913 Handle mirror(THREAD, mirror_oop);
914 Handle comp_mirror;
915
916 // Setup indirection from mirror->klass
917 java_lang_Class::set_klass(mirror(), k);
918
919 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
920 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
921
922 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
923
924 // It might also have a component mirror. This mirror must already exist.
925 if (k->is_array_klass()) {
926 if (k->is_valueArray_klass()) {
927 Klass* element_klass = (Klass*) ValueArrayKlass::cast(k)->element_klass();
928 assert(element_klass->is_value(), "Must be value type component");
929 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(element_klass));
930 comp_mirror = Handle(THREAD, vk->value_mirror());
931 } else if (k->is_typeArray_klass()) {
932 BasicType type = TypeArrayKlass::cast(k)->element_type();
933 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
934 } else {
935 assert(k->is_objArray_klass(), "Must be");
936 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
937 assert(element_klass != NULL, "Must have an element klass");
938 if (element_klass->is_value()) {
939 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(element_klass));
940 assert(vk->java_mirror() == vk->value_mirror(), "primary mirror is the value mirror");
941 assert(vk->nullable_mirror() != NULL, "must have a nullable class mirror");
942 comp_mirror = k->name()->is_Q_array_signature() ? Handle(THREAD, vk->value_mirror())
943 : Handle(THREAD, vk->nullable_mirror());
944 } else {
945 comp_mirror = Handle(THREAD, element_klass->java_mirror());
946 }
947 }
948 assert(comp_mirror() != NULL, "must have a mirror");
949
950 // Two-way link between the array klass and its component mirror:
951 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
952 set_component_mirror(mirror(), comp_mirror());
953 // See below for ordering dependencies between field array_klass in component mirror
954 // and java_mirror in this klass.
955 } else {
956 assert(k->is_instance_klass(), "Must be");
957
958 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
959 if (HAS_PENDING_EXCEPTION) {
960 // If any of the fields throws an exception like OOM remove the klass field
961 // from the mirror so GC doesn't follow it after the klass has been deallocated.
962 // This mirror looks like a primitive type, which logically it is because it
963 // it represents no class.
964 java_lang_Class::set_klass(mirror(), NULL);
965 return;
966 }
967 }
968
969 // set the classLoader field in the java_lang_Class instance
970 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
971 set_class_loader(mirror(), class_loader());
972
973 // Setup indirection from klass->mirror
974 // after any exceptions can happen during allocations.
975 k->set_java_mirror(mirror);
976
977 // Set the module field in the java_lang_Class instance. This must be done
978 // after the mirror is set.
979 set_mirror_module_field(k, mirror, module, THREAD);
980
981 if (comp_mirror() != NULL) {
982 // Set after k->java_mirror() is published, because compiled code running
983 // concurrently doesn't expect a k to have a null java_mirror.
984 release_set_array_klass(comp_mirror(), k);
985 }
986
987 if (k->is_value()) {
988 // create the secondary mirror for an inline class
989 oop nullable_mirror_oop = create_nullable_inline_type_mirror(k, mirror, CHECK);
990 set_inline_type_mirror(mirror(), mirror());
991 set_nullable_type_mirror(mirror(), nullable_mirror_oop);
992 }
993 } else {
994 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
995 fixup_mirror_list()->push(k);
996 }
997 }
998
999 // Create the secondary mirror for inline class. Sets all the fields of this java.lang.Class
1000 // instance with the same value as the primary mirror
1001 oop java_lang_Class::create_nullable_inline_type_mirror(Klass* k, Handle mirror, TRAPS) {
1002 assert(k->is_value(), "inline class");
1003 // Allocate mirror (java.lang.Class instance)
1004 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0);
1005 Handle nullable_mirror(THREAD, mirror_oop);
1006
1007 java_lang_Class::set_klass(nullable_mirror(), k);
1008 java_lang_Class::set_static_oop_field_count(nullable_mirror(), static_oop_field_count(mirror()));
1009 // ## do we need to set init lock?
1010 java_lang_Class::set_init_lock(nullable_mirror(), init_lock(mirror()));
1011
1012 set_protection_domain(nullable_mirror(), protection_domain(mirror()));
1013 set_class_loader(nullable_mirror(), class_loader(mirror()));
1014 // ## handle if java.base is not yet defined
1015 set_module(nullable_mirror(), module(mirror()));
1016 set_inline_type_mirror(nullable_mirror(), mirror());
1017 set_nullable_type_mirror(nullable_mirror(), nullable_mirror());
1018 return nullable_mirror();
1019 }
1020
1021 #if INCLUDE_CDS_JAVA_HEAP
1022 // Clears mirror fields. Static final fields with initial values are reloaded
1023 // from constant pool. The object identity hash is in the object header and is
1024 // not affected.
1025 class ResetMirrorField: public FieldClosure {
1026 private:
1027 Handle _m;
1028
1029 public:
1030 ResetMirrorField(Handle mirror) : _m(mirror) {}
1031
1032 void do_field(fieldDescriptor* fd) {
1033 assert(DumpSharedSpaces, "dump time only");
1034 assert(_m.not_null(), "Mirror cannot be NULL");
1035
1036 if (fd->is_static() && fd->has_initial_value()) {
1037 initialize_static_field(fd, _m, Thread::current());
1038 return;
1039 }
1040
1041 BasicType ft = fd->field_type();
1042 switch (ft) {
1043 case T_BYTE:
1044 _m()->byte_field_put(fd->offset(), 0);
1045 break;
1046 case T_CHAR:
1047 _m()->char_field_put(fd->offset(), 0);
1048 break;
1049 case T_DOUBLE:
1050 _m()->double_field_put(fd->offset(), 0);
1051 break;
1052 case T_FLOAT:
1053 _m()->float_field_put(fd->offset(), 0);
1054 break;
1055 case T_INT:
1056 _m()->int_field_put(fd->offset(), 0);
1057 break;
1058 case T_LONG:
1059 _m()->long_field_put(fd->offset(), 0);
1060 break;
1061 case T_SHORT:
1062 _m()->short_field_put(fd->offset(), 0);
1063 break;
1064 case T_BOOLEAN:
1065 _m()->bool_field_put(fd->offset(), false);
1066 break;
1067 case T_ARRAY:
1068 case T_OBJECT: {
1069 // It might be useful to cache the String field, but
1070 // for now just clear out any reference field
1071 oop o = _m()->obj_field(fd->offset());
1072 _m()->obj_field_put(fd->offset(), NULL);
1073 break;
1074 }
1075 default:
1076 ShouldNotReachHere();
1077 break;
1078 }
1079 }
1080 };
1081
1082 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1083 assert(HeapShared::is_heap_object_archiving_allowed(),
1084 "HeapShared::is_heap_object_archiving_allowed() must be true");
1085
1086 for (int t = 0; t <= T_VOID; t++) {
1087 oop m = Universe::_mirrors[t];
1088 if (m != NULL) {
1089 // Update the field at _array_klass_offset to point to the relocated array klass.
1090 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1091 assert(archived_m != NULL, "sanity");
1092 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1093 assert(ak != NULL || t == T_VOID, "should not be NULL");
1094 if (ak != NULL) {
1095 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1096 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1097 }
1098
1099 // Clear the fields. Just to be safe
1100 Klass *k = m->klass();
1101 Handle archived_mirror_h(THREAD, archived_m);
1102 ResetMirrorField reset(archived_mirror_h);
1103 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1104
1105 log_trace(cds, heap, mirror)(
1106 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1107 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1108
1109 Universe::_mirrors[t] = archived_m;
1110 }
1111 }
1112
1113 assert(Universe::_mirrors[T_INT] != NULL &&
1114 Universe::_mirrors[T_FLOAT] != NULL &&
1115 Universe::_mirrors[T_DOUBLE] != NULL &&
1116 Universe::_mirrors[T_BYTE] != NULL &&
1117 Universe::_mirrors[T_BOOLEAN] != NULL &&
1118 Universe::_mirrors[T_CHAR] != NULL &&
1119 Universe::_mirrors[T_LONG] != NULL &&
1120 Universe::_mirrors[T_SHORT] != NULL &&
1121 Universe::_mirrors[T_VOID] != NULL, "sanity");
1122
1123 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1124 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1125 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1126 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1127 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1128 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1129 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1130 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1131 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1132 }
1133
1134 //
1135 // After the mirror object is successfully archived, the archived
1136 // klass is set with _has_archived_raw_mirror flag.
1137 //
1138 // The _has_archived_raw_mirror flag is cleared at runtime when the
1139 // archived mirror is restored. If archived java heap data cannot
1140 // be used at runtime, new mirror object is created for the shared
1141 // class. The _has_archived_raw_mirror is cleared also during the process.
1142 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1143 assert(HeapShared::is_heap_object_archiving_allowed(),
1144 "HeapShared::is_heap_object_archiving_allowed() must be true");
1145
1146 // Mirror is already archived
1147 if (k->has_raw_archived_mirror()) {
1148 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1149 return k->archived_java_mirror_raw();
1150 }
1151
1152 // No mirror
1153 oop mirror = k->java_mirror();
1154 if (mirror == NULL) {
1155 return NULL;
1156 }
1157
1158 if (k->is_instance_klass()) {
1159 InstanceKlass *ik = InstanceKlass::cast(k);
1160 assert(ik->signers() == NULL, "class with signer should have been excluded");
1161
1162 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1163 ik->is_shared_app_class())) {
1164 // Archiving mirror for classes from non-builtin loaders is not
1165 // supported. Clear the _java_mirror within the archived class.
1166 k->set_java_mirror_handle(NULL);
1167 return NULL;
1168 }
1169 }
1170
1171 // Now start archiving the mirror object
1172 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1173 if (archived_mirror == NULL) {
1174 return NULL;
1175 }
1176
1177 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1178 if (archived_mirror == NULL) {
1179 return NULL;
1180 }
1181
1182 k->set_archived_java_mirror_raw(archived_mirror);
1183
1184 k->set_has_raw_archived_mirror();
1185
1186 ResourceMark rm;
1187 log_trace(cds, heap, mirror)(
1188 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1189 k->external_name(), p2i(mirror), p2i(archived_mirror));
1190
1191 return archived_mirror;
1192 }
1193
1194 // The process is based on create_mirror().
1195 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1196 oop archived_mirror,
1197 Thread *THREAD) {
1198 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1199 // to archived metadata and objects below.
1200 Klass *c = archived_mirror->klass();
1201 Handle archived_mirror_h(THREAD, archived_mirror);
1202 ResetMirrorField reset(archived_mirror_h);
1203 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1204
1205 if (k->is_array_klass()) {
1206 oop archived_comp_mirror;
1207 if (k->is_typeArray_klass()) {
1208 // The primitive type mirrors are already archived. Get the archived mirror.
1209 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1210 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1211 assert(archived_comp_mirror != NULL, "Must be");
1212 } else {
1213 assert(k->is_objArray_klass(), "Must be");
1214 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1215 assert(element_klass != NULL, "Must have an element klass");
1216 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1217 if (archived_comp_mirror == NULL) {
1218 return NULL;
1219 }
1220 }
1221 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1222 } else {
1223 assert(k->is_instance_klass(), "Must be");
1224
1225 // Reset local static fields in the mirror
1226 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1227
1228 java_lang_Class:set_init_lock(archived_mirror, NULL);
1229
1230 set_protection_domain(archived_mirror, NULL);
1231 }
1232
1233 // clear class loader and mirror_module_field
1234 set_class_loader(archived_mirror, NULL);
1235 set_module(archived_mirror, NULL);
1236
1237 // The archived mirror's field at _klass_offset is still pointing to the original
1238 // klass. Updated the field in the archived mirror to point to the relocated
1239 // klass in the archive.
1240 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1241 log_debug(cds, heap, mirror)(
1242 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1243 p2i(as_Klass(mirror)), p2i(reloc_k));
1244 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1245
1246 // The field at _array_klass_offset is pointing to the original one dimension
1247 // higher array klass if exists. Relocate the pointer.
1248 Klass *arr = array_klass_acquire(mirror);
1249 if (arr != NULL) {
1250 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1251 log_debug(cds, heap, mirror)(
1252 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1253 p2i(arr), p2i(reloc_arr));
1254 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1255 }
1256 return archived_mirror;
1257 }
1258
1259 // Returns true if the mirror is updated, false if no archived mirror
1260 // data is present. After the archived mirror object is restored, the
1261 // shared klass' _has_raw_archived_mirror flag is cleared.
1262 bool java_lang_Class::restore_archived_mirror(Klass *k,
1263 Handle class_loader, Handle module,
1264 Handle protection_domain, TRAPS) {
1265 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1266 // see more details in SystemDictionary::resolve_well_known_classes().
1267 if (!SystemDictionary::Class_klass_loaded()) {
1268 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1269 fixup_mirror_list()->push(k);
1270 return true;
1271 }
1272
1273 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1274
1275 if (m == NULL) {
1276 return false;
1277 }
1278
1279 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1280
1281 // mirror is archived, restore
1282 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1283 Handle mirror(THREAD, m);
1284
1285 if (!k->is_array_klass()) {
1286 // - local static final fields with initial values were initialized at dump time
1287
1288 // create the init_lock
1289 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1290 set_init_lock(mirror(), r);
1291
1292 if (protection_domain.not_null()) {
1293 set_protection_domain(mirror(), protection_domain());
1294 }
1295 }
1296
1297 assert(class_loader() == k->class_loader(), "should be same");
1298 if (class_loader.not_null()) {
1299 set_class_loader(mirror(), class_loader());
1300 }
1301
1302 k->set_java_mirror(mirror);
1303 k->clear_has_raw_archived_mirror();
1304
1305 set_mirror_module_field(k, mirror, module, THREAD);
1306
1307 ResourceMark rm;
1308 log_trace(cds, heap, mirror)(
1309 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1310
1311 return true;
1312 }
1313 #endif // INCLUDE_CDS_JAVA_HEAP
1314
1315 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1316 assert(_module_offset != 0, "must have been computed already");
1317 java_lang_Class::set_module(k->java_mirror(), module());
1318 }
1319
1320 int java_lang_Class::oop_size(oop java_class) {
1321 assert(_oop_size_offset != 0, "must be set");
1322 int size = java_class->int_field(_oop_size_offset);
1323 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1324 return size;
1325 }
1326
1327
1328 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1329 assert(_oop_size_offset != 0, "must be set");
1330 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1331 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1332 }
1333
1334 int java_lang_Class::static_oop_field_count(oop java_class) {
1335 assert(_static_oop_field_count_offset != 0, "must be set");
1336 return java_class->int_field(_static_oop_field_count_offset);
1337 }
1338
1339 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1340 assert(_static_oop_field_count_offset != 0, "must be set");
1341 return java_class->int_field_raw(_static_oop_field_count_offset);
1342 }
1343
1344 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1345 assert(_static_oop_field_count_offset != 0, "must be set");
1346 java_class->int_field_put(_static_oop_field_count_offset, size);
1347 }
1348
1349 oop java_lang_Class::protection_domain(oop java_class) {
1350 assert(_protection_domain_offset != 0, "must be set");
1351 return java_class->obj_field(_protection_domain_offset);
1352 }
1353 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1354 assert(_protection_domain_offset != 0, "must be set");
1355 java_class->obj_field_put(_protection_domain_offset, pd);
1356 }
1357
1358 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1359 assert(_component_mirror_offset != 0, "must be set");
1360 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1361 }
1362 oop java_lang_Class::component_mirror(oop java_class) {
1363 assert(_component_mirror_offset != 0, "must be set");
1364 return java_class->obj_field(_component_mirror_offset);
1365 }
1366
1367 oop java_lang_Class::init_lock(oop java_class) {
1368 assert(_init_lock_offset != 0, "must be set");
1369 return java_class->obj_field(_init_lock_offset);
1370 }
1371 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1372 assert(_init_lock_offset != 0, "must be set");
1373 java_class->obj_field_put(_init_lock_offset, init_lock);
1374 }
1375
1376 objArrayOop java_lang_Class::signers(oop java_class) {
1377 assert(_signers_offset != 0, "must be set");
1378 return (objArrayOop)java_class->obj_field(_signers_offset);
1379 }
1380 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1381 assert(_signers_offset != 0, "must be set");
1382 java_class->obj_field_put(_signers_offset, (oop)signers);
1383 }
1384
1385
1386 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1387 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1388 if (_class_loader_offset != 0) {
1389 java_class->obj_field_put(_class_loader_offset, loader);
1390 }
1391 }
1392
1393 oop java_lang_Class::class_loader(oop java_class) {
1394 assert(_class_loader_offset != 0, "must be set");
1395 return java_class->obj_field(_class_loader_offset);
1396 }
1397
1398 oop java_lang_Class::module(oop java_class) {
1399 assert(_module_offset != 0, "must be set");
1400 return java_class->obj_field(_module_offset);
1401 }
1402
1403 void java_lang_Class::set_module(oop java_class, oop module) {
1404 assert(_module_offset != 0, "must be set");
1405 java_class->obj_field_put(_module_offset, module);
1406 }
1407
1408 oop java_lang_Class::name(Handle java_class, TRAPS) {
1409 assert(_name_offset != 0, "must be set");
1410 oop o = java_class->obj_field(_name_offset);
1411 if (o == NULL) {
1412 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1413 java_class->obj_field_put(_name_offset, o);
1414 }
1415 return o;
1416 }
1417
1418 oop java_lang_Class::source_file(oop java_class) {
1419 assert(_source_file_offset != 0, "must be set");
1420 return java_class->obj_field(_source_file_offset);
1421 }
1422
1423 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1424 assert(_source_file_offset != 0, "must be set");
1425 java_class->obj_field_put(_source_file_offset, source_file);
1426 }
1427
1428 oop java_lang_Class::inline_type_mirror(oop java_class) {
1429 assert(_inline_mirror_offset != 0, "must be set");
1430 return java_class->obj_field(_inline_mirror_offset);
1431 }
1432
1433 void java_lang_Class::set_inline_type_mirror(oop java_class, oop mirror) {
1434 assert(_inline_mirror_offset != 0, "must be set");
1435 java_class->obj_field_put(_inline_mirror_offset, mirror);
1436 }
1437
1438 oop java_lang_Class::nullable_type_mirror(oop java_class) {
1439 assert(_nullable_mirror_offset != 0, "must be set");
1440 return java_class->obj_field(_nullable_mirror_offset);
1441 }
1442
1443 void java_lang_Class::set_nullable_type_mirror(oop java_class, oop mirror) {
1444 assert(_nullable_mirror_offset != 0, "must be set");
1445 java_class->obj_field_put(_nullable_mirror_offset, mirror);
1446 }
1447
1448 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1449 // This should be improved by adding a field at the Java level or by
1450 // introducing a new VM klass (see comment in ClassFileParser)
1451 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1452 if (type != T_VOID) {
1453 Klass* aklass = Universe::typeArrayKlassObj(type);
1454 assert(aklass != NULL, "correct bootstrap");
1455 release_set_array_klass(java_class, aklass);
1456 }
1457 #ifdef ASSERT
1458 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1459 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1460 #endif
1461 return java_class;
1462 }
1463
1464
1465 Klass* java_lang_Class::as_Klass(oop java_class) {
1466 //%note memory_2
1467 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1468 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1469 assert(k == NULL || k->is_klass(), "type check");
1470 return k;
1471 }
1472
1473 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1474 //%note memory_2
1475 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1476 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1477 assert(k == NULL || k->is_klass(), "type check");
1478 return k;
1479 }
1480
1481
1482 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1483 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1484 java_class->metadata_field_put(_klass_offset, klass);
1485 }
1486
1487
1488 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1489 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1490 Symbol* name = NULL;
1491 bool is_instance = false;
1492 bool is_value = false;
1493 if (is_primitive(java_class)) {
1494 name = vmSymbols::type_signature(primitive_type(java_class));
1495 } else {
1496 Klass* k = as_Klass(java_class);
1497 is_instance = k->is_instance_klass();
1498 is_value = k->is_value();
1499 name = k->name();
1500 }
1501 if (name == NULL) {
1502 st->print("<null>");
1503 return;
1504 }
1505 if (is_instance) {
1506 if (is_value && (java_class == inline_type_mirror(java_class))) {
1507 st->print("Q");
1508 } else {
1509 st->print("L");
1510 }
1511 }
1512 st->write((char*) name->base(), (int) name->utf8_length());
1513 if (is_instance) st->print(";");
1514 }
1515
1516 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1517 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1518 Symbol* name;
1519 if (is_primitive(java_class)) {
1520 name = vmSymbols::type_signature(primitive_type(java_class));
1521 // Because this can create a new symbol, the caller has to decrement
1522 // the refcount, so make adjustment here and below for symbols returned
1523 // that are not created or incremented due to a successful lookup.
1524 name->increment_refcount();
1525 } else {
1526 Klass* k = as_Klass(java_class);
1527 if (!k->is_instance_klass()) {
1528 name = k->name();
1529 name->increment_refcount();
1530 } else {
1531 ResourceMark rm;
1532 const char* sigstr;
1533 if (k->is_value()) {
1534 char c = (java_class == inline_type_mirror(java_class)) ? 'Q' : 'L';
1535 sigstr = InstanceKlass::cast(k)->signature_name_of(c);
1536 } else {
1537 sigstr = k->signature_name();
1538 }
1539 int siglen = (int) strlen(sigstr);
1540 if (!intern_if_not_found) {
1541 name = SymbolTable::probe(sigstr, siglen);
1542 } else {
1543 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1544 }
1545 }
1546 }
1547 return name;
1548 }
1549
1550 // Returns the Java name for this Java mirror (Resource allocated)
1551 // See Klass::external_name().
1552 // For primitive type Java mirrors, its type name is returned.
1553 const char* java_lang_Class::as_external_name(oop java_class) {
1554 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1555 const char* name = NULL;
1556 if (is_primitive(java_class)) {
1557 name = type2name(primitive_type(java_class));
1558 } else {
1559 name = as_Klass(java_class)->external_name();
1560 }
1561 if (name == NULL) {
1562 name = "<null>";
1563 }
1564 return name;
1565 }
1566
1567 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1568 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1569 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1570 return k;
1571 }
1572
1573
1574 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1575 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1576 java_class->release_metadata_field_put(_array_klass_offset, klass);
1577 }
1578
1579
1580 BasicType java_lang_Class::primitive_type(oop java_class) {
1581 assert(java_lang_Class::is_primitive(java_class), "just checking");
1582 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1583 BasicType type = T_VOID;
1584 if (ak != NULL) {
1585 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1586 type = ArrayKlass::cast(ak)->element_type();
1587 } else {
1588 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1589 }
1590 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1591 return type;
1592 }
1593
1594 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1595 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1596 if (is_primitive(java_class)) {
1597 if (reference_klass != NULL)
1598 (*reference_klass) = NULL;
1599 return primitive_type(java_class);
1600 } else {
1601 if (reference_klass != NULL)
1602 (*reference_klass) = as_Klass(java_class);
1603 return T_OBJECT;
1604 }
1605 }
1606
1607
1608 oop java_lang_Class::primitive_mirror(BasicType t) {
1609 oop mirror = Universe::java_mirror(t);
1610 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1611 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1612 return mirror;
1613 }
1614
1615 bool java_lang_Class::offsets_computed = false;
1616 int java_lang_Class::classRedefinedCount_offset = -1;
1617
1618 #define CLASS_FIELDS_DO(macro) \
1619 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1620 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1621 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1622 macro(_module_offset, k, "module", module_signature, false); \
1623 macro(_name_offset, k, "name", string_signature, false); \
1624 macro(_inline_mirror_offset, k, "inlineType", class_signature, false); \
1625 macro(_nullable_mirror_offset, k, "nullableType", class_signature, false); \
1626
1627 void java_lang_Class::compute_offsets() {
1628 if (offsets_computed) {
1629 return;
1630 }
1631
1632 offsets_computed = true;
1633
1634 InstanceKlass* k = SystemDictionary::Class_klass();
1635 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1636
1637 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1638 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1639 // GC treats them the same.
1640 _init_lock_offset = _component_mirror_offset;
1641
1642 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1643 }
1644
1645 #if INCLUDE_CDS
1646 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1647 f->do_u4((u4*)&offsets_computed);
1648 f->do_u4((u4*)&_init_lock_offset);
1649
1650 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1651
1652 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1653 }
1654 #endif
1655
1656 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1657 if (classRedefinedCount_offset == -1) {
1658 // If we don't have an offset for it then just return -1 as a marker.
1659 return -1;
1660 }
1661
1662 return the_class_mirror->int_field(classRedefinedCount_offset);
1663 }
1664
1665 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1666 if (classRedefinedCount_offset == -1) {
1667 // If we don't have an offset for it then nothing to set.
1668 return;
1669 }
1670
1671 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1672 }
1673
1674
1675 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1676 // platform thread structure, and a eetop offset which was used for thread
1677 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1678 // merged, so in the HotSpot VM we just use the eetop field for the thread
1679 // instead of the privateInfo_offset.
1680 //
1681 // Note: The stackSize field is only present starting in 1.4.
1682
1683 int java_lang_Thread::_name_offset = 0;
1684 int java_lang_Thread::_group_offset = 0;
1685 int java_lang_Thread::_contextClassLoader_offset = 0;
1686 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1687 int java_lang_Thread::_priority_offset = 0;
1688 int java_lang_Thread::_eetop_offset = 0;
1689 int java_lang_Thread::_daemon_offset = 0;
1690 int java_lang_Thread::_stillborn_offset = 0;
1691 int java_lang_Thread::_stackSize_offset = 0;
1692 int java_lang_Thread::_tid_offset = 0;
1693 int java_lang_Thread::_thread_status_offset = 0;
1694 int java_lang_Thread::_park_blocker_offset = 0;
1695 int java_lang_Thread::_park_event_offset = 0 ;
1696
1697 #define THREAD_FIELDS_DO(macro) \
1698 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1699 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1700 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1701 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1702 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1703 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1704 macro(_eetop_offset, k, "eetop", long_signature, false); \
1705 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1706 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1707 macro(_tid_offset, k, "tid", long_signature, false); \
1708 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1709 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1710 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false)
1711
1712 void java_lang_Thread::compute_offsets() {
1713 assert(_group_offset == 0, "offsets should be initialized only once");
1714
1715 InstanceKlass* k = SystemDictionary::Thread_klass();
1716 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1717 }
1718
1719 #if INCLUDE_CDS
1720 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1721 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1722 }
1723 #endif
1724
1725 JavaThread* java_lang_Thread::thread(oop java_thread) {
1726 return (JavaThread*)java_thread->address_field(_eetop_offset);
1727 }
1728
1729
1730 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1731 java_thread->address_field_put(_eetop_offset, (address)thread);
1732 }
1733
1734
1735 oop java_lang_Thread::name(oop java_thread) {
1736 return java_thread->obj_field(_name_offset);
1737 }
1738
1739
1740 void java_lang_Thread::set_name(oop java_thread, oop name) {
1741 java_thread->obj_field_put(_name_offset, name);
1742 }
1743
1744
1745 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1746 return (ThreadPriority)java_thread->int_field(_priority_offset);
1747 }
1748
1749
1750 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1751 java_thread->int_field_put(_priority_offset, priority);
1752 }
1753
1754
1755 oop java_lang_Thread::threadGroup(oop java_thread) {
1756 return java_thread->obj_field(_group_offset);
1757 }
1758
1759
1760 bool java_lang_Thread::is_stillborn(oop java_thread) {
1761 return java_thread->bool_field(_stillborn_offset) != 0;
1762 }
1763
1764
1765 // We never have reason to turn the stillborn bit off
1766 void java_lang_Thread::set_stillborn(oop java_thread) {
1767 java_thread->bool_field_put(_stillborn_offset, true);
1768 }
1769
1770
1771 bool java_lang_Thread::is_alive(oop java_thread) {
1772 JavaThread* thr = java_lang_Thread::thread(java_thread);
1773 return (thr != NULL);
1774 }
1775
1776
1777 bool java_lang_Thread::is_daemon(oop java_thread) {
1778 return java_thread->bool_field(_daemon_offset) != 0;
1779 }
1780
1781
1782 void java_lang_Thread::set_daemon(oop java_thread) {
1783 java_thread->bool_field_put(_daemon_offset, true);
1784 }
1785
1786 oop java_lang_Thread::context_class_loader(oop java_thread) {
1787 return java_thread->obj_field(_contextClassLoader_offset);
1788 }
1789
1790 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1791 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1792 }
1793
1794
1795 jlong java_lang_Thread::stackSize(oop java_thread) {
1796 if (_stackSize_offset > 0) {
1797 return java_thread->long_field(_stackSize_offset);
1798 } else {
1799 return 0;
1800 }
1801 }
1802
1803 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1804 void java_lang_Thread::set_thread_status(oop java_thread,
1805 java_lang_Thread::ThreadStatus status) {
1806 // The threadStatus is only present starting in 1.5
1807 if (_thread_status_offset > 0) {
1808 java_thread->int_field_put(_thread_status_offset, status);
1809 }
1810 }
1811
1812 // Read thread status value from threadStatus field in java.lang.Thread java class.
1813 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1814 // Make sure the caller is operating on behalf of the VM or is
1815 // running VM code (state == _thread_in_vm).
1816 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1817 JavaThread::current()->thread_state() == _thread_in_vm,
1818 "Java Thread is not running in vm");
1819 // The threadStatus is only present starting in 1.5
1820 if (_thread_status_offset > 0) {
1821 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1822 } else {
1823 // All we can easily figure out is if it is alive, but that is
1824 // enough info for a valid unknown status.
1825 // These aren't restricted to valid set ThreadStatus values, so
1826 // use JVMTI values and cast.
1827 JavaThread* thr = java_lang_Thread::thread(java_thread);
1828 if (thr == NULL) {
1829 // the thread hasn't run yet or is in the process of exiting
1830 return NEW;
1831 }
1832 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1833 }
1834 }
1835
1836
1837 jlong java_lang_Thread::thread_id(oop java_thread) {
1838 // The thread ID field is only present starting in 1.5
1839 if (_tid_offset > 0) {
1840 return java_thread->long_field(_tid_offset);
1841 } else {
1842 return 0;
1843 }
1844 }
1845
1846 oop java_lang_Thread::park_blocker(oop java_thread) {
1847 assert(JDK_Version::current().supports_thread_park_blocker() &&
1848 _park_blocker_offset != 0, "Must support parkBlocker field");
1849
1850 if (_park_blocker_offset > 0) {
1851 return java_thread->obj_field(_park_blocker_offset);
1852 }
1853
1854 return NULL;
1855 }
1856
1857 jlong java_lang_Thread::park_event(oop java_thread) {
1858 if (_park_event_offset > 0) {
1859 return java_thread->long_field(_park_event_offset);
1860 }
1861 return 0;
1862 }
1863
1864 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1865 if (_park_event_offset > 0) {
1866 java_thread->long_field_put(_park_event_offset, ptr);
1867 return true;
1868 }
1869 return false;
1870 }
1871
1872
1873 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1874 assert(_thread_status_offset != 0, "Must have thread status");
1875 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1876 switch (status) {
1877 case NEW : return "NEW";
1878 case RUNNABLE : return "RUNNABLE";
1879 case SLEEPING : return "TIMED_WAITING (sleeping)";
1880 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1881 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1882 case PARKED : return "WAITING (parking)";
1883 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1884 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1885 case TERMINATED : return "TERMINATED";
1886 default : return "UNKNOWN";
1887 };
1888 }
1889 int java_lang_ThreadGroup::_parent_offset = 0;
1890 int java_lang_ThreadGroup::_name_offset = 0;
1891 int java_lang_ThreadGroup::_threads_offset = 0;
1892 int java_lang_ThreadGroup::_groups_offset = 0;
1893 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1894 int java_lang_ThreadGroup::_destroyed_offset = 0;
1895 int java_lang_ThreadGroup::_daemon_offset = 0;
1896 int java_lang_ThreadGroup::_nthreads_offset = 0;
1897 int java_lang_ThreadGroup::_ngroups_offset = 0;
1898
1899 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1900 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1901 return java_thread_group->obj_field(_parent_offset);
1902 }
1903
1904 // ("name as oop" accessor is not necessary)
1905
1906 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1907 oop name = java_thread_group->obj_field(_name_offset);
1908 // ThreadGroup.name can be null
1909 if (name != NULL) {
1910 return java_lang_String::as_utf8_string(name);
1911 }
1912 return NULL;
1913 }
1914
1915 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1916 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1917 return java_thread_group->int_field(_nthreads_offset);
1918 }
1919
1920 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1921 oop threads = java_thread_group->obj_field(_threads_offset);
1922 assert(threads != NULL, "threadgroups should have threads");
1923 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1924 return objArrayOop(threads);
1925 }
1926
1927 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1928 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1929 return java_thread_group->int_field(_ngroups_offset);
1930 }
1931
1932 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1933 oop groups = java_thread_group->obj_field(_groups_offset);
1934 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1935 return objArrayOop(groups);
1936 }
1937
1938 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1939 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1940 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1941 }
1942
1943 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1944 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1945 return java_thread_group->bool_field(_destroyed_offset) != 0;
1946 }
1947
1948 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1949 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1950 return java_thread_group->bool_field(_daemon_offset) != 0;
1951 }
1952
1953 #define THREADGROUP_FIELDS_DO(macro) \
1954 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1955 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1956 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1957 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1958 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1959 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1960 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1961 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1962 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1963
1964 void java_lang_ThreadGroup::compute_offsets() {
1965 assert(_parent_offset == 0, "offsets should be initialized only once");
1966
1967 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1968 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1969 }
1970
1971 #if INCLUDE_CDS
1972 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1973 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1974 }
1975 #endif
1976
1977 #define THROWABLE_FIELDS_DO(macro) \
1978 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1979 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1980 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1981 macro(depth_offset, k, "depth", int_signature, false); \
1982 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1983
1984 void java_lang_Throwable::compute_offsets() {
1985 InstanceKlass* k = SystemDictionary::Throwable_klass();
1986 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1987 }
1988
1989 #if INCLUDE_CDS
1990 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1991 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1992 }
1993 #endif
1994
1995 oop java_lang_Throwable::unassigned_stacktrace() {
1996 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1997 oop base = ik->static_field_base_raw();
1998 return base->obj_field(static_unassigned_stacktrace_offset);
1999 }
2000
2001 oop java_lang_Throwable::backtrace(oop throwable) {
2002 return throwable->obj_field_acquire(backtrace_offset);
2003 }
2004
2005
2006 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2007 throwable->release_obj_field_put(backtrace_offset, value);
2008 }
2009
2010 int java_lang_Throwable::depth(oop throwable) {
2011 return throwable->int_field(depth_offset);
2012 }
2013
2014 void java_lang_Throwable::set_depth(oop throwable, int value) {
2015 throwable->int_field_put(depth_offset, value);
2016 }
2017
2018 oop java_lang_Throwable::message(oop throwable) {
2019 return throwable->obj_field(detailMessage_offset);
2020 }
2021
2022
2023 // Return Symbol for detailed_message or NULL
2024 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2025 PRESERVE_EXCEPTION_MARK; // Keep original exception
2026 oop detailed_message = java_lang_Throwable::message(throwable);
2027 if (detailed_message != NULL) {
2028 return java_lang_String::as_symbol(detailed_message, THREAD);
2029 }
2030 return NULL;
2031 }
2032
2033 void java_lang_Throwable::set_message(oop throwable, oop value) {
2034 throwable->obj_field_put(detailMessage_offset, value);
2035 }
2036
2037
2038 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2039 throwable->obj_field_put(stackTrace_offset, st_element_array);
2040 }
2041
2042 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2043 set_stacktrace(throwable, NULL);
2044 }
2045
2046
2047 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2048 ResourceMark rm;
2049 Klass* k = throwable->klass();
2050 assert(k != NULL, "just checking");
2051 st->print("%s", k->external_name());
2052 oop msg = message(throwable);
2053 if (msg != NULL) {
2054 st->print(": %s", java_lang_String::as_utf8_string(msg));
2055 }
2056 }
2057
2058 // After this many redefines, the stack trace is unreliable.
2059 const int MAX_VERSION = USHRT_MAX;
2060
2061 static inline bool version_matches(Method* method, int version) {
2062 assert(version < MAX_VERSION, "version is too big");
2063 return method != NULL && (method->constants()->version() == version);
2064 }
2065
2066
2067 // This class provides a simple wrapper over the internal structure of
2068 // exception backtrace to insulate users of the backtrace from needing
2069 // to know what it looks like.
2070 class BacktraceBuilder: public StackObj {
2071 friend class BacktraceIterator;
2072 private:
2073 Handle _backtrace;
2074 objArrayOop _head;
2075 typeArrayOop _methods;
2076 typeArrayOop _bcis;
2077 objArrayOop _mirrors;
2078 typeArrayOop _names; // needed to insulate method name against redefinition
2079 int _index;
2080 NoSafepointVerifier _nsv;
2081
2082 enum {
2083 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2084 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2085 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2086 trace_names_offset = java_lang_Throwable::trace_names_offset,
2087 trace_next_offset = java_lang_Throwable::trace_next_offset,
2088 trace_size = java_lang_Throwable::trace_size,
2089 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2090 };
2091
2092 // get info out of chunks
2093 static typeArrayOop get_methods(objArrayHandle chunk) {
2094 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2095 assert(methods != NULL, "method array should be initialized in backtrace");
2096 return methods;
2097 }
2098 static typeArrayOop get_bcis(objArrayHandle chunk) {
2099 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2100 assert(bcis != NULL, "bci array should be initialized in backtrace");
2101 return bcis;
2102 }
2103 static objArrayOop get_mirrors(objArrayHandle chunk) {
2104 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2105 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2106 return mirrors;
2107 }
2108 static typeArrayOop get_names(objArrayHandle chunk) {
2109 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2110 assert(names != NULL, "names array should be initialized in backtrace");
2111 return names;
2112 }
2113
2114 public:
2115
2116 // constructor for new backtrace
2117 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2118 expand(CHECK);
2119 _backtrace = Handle(THREAD, _head);
2120 _index = 0;
2121 }
2122
2123 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2124 _methods = get_methods(backtrace);
2125 _bcis = get_bcis(backtrace);
2126 _mirrors = get_mirrors(backtrace);
2127 _names = get_names(backtrace);
2128 assert(_methods->length() == _bcis->length() &&
2129 _methods->length() == _mirrors->length() &&
2130 _mirrors->length() == _names->length(),
2131 "method and source information arrays should match");
2132
2133 // head is the preallocated backtrace
2134 _head = backtrace();
2135 _backtrace = Handle(thread, _head);
2136 _index = 0;
2137 }
2138
2139 void expand(TRAPS) {
2140 objArrayHandle old_head(THREAD, _head);
2141 PauseNoSafepointVerifier pnsv(&_nsv);
2142
2143 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2144 objArrayHandle new_head(THREAD, head);
2145
2146 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2147 typeArrayHandle new_methods(THREAD, methods);
2148
2149 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2150 typeArrayHandle new_bcis(THREAD, bcis);
2151
2152 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2153 objArrayHandle new_mirrors(THREAD, mirrors);
2154
2155 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2156 typeArrayHandle new_names(THREAD, names);
2157
2158 if (!old_head.is_null()) {
2159 old_head->obj_at_put(trace_next_offset, new_head());
2160 }
2161 new_head->obj_at_put(trace_methods_offset, new_methods());
2162 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2163 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2164 new_head->obj_at_put(trace_names_offset, new_names());
2165
2166 _head = new_head();
2167 _methods = new_methods();
2168 _bcis = new_bcis();
2169 _mirrors = new_mirrors();
2170 _names = new_names();
2171 _index = 0;
2172 }
2173
2174 oop backtrace() {
2175 return _backtrace();
2176 }
2177
2178 inline void push(Method* method, int bci, TRAPS) {
2179 // Smear the -1 bci to 0 since the array only holds unsigned
2180 // shorts. The later line number lookup would just smear the -1
2181 // to a 0 even if it could be recorded.
2182 if (bci == SynchronizationEntryBCI) bci = 0;
2183
2184 if (_index >= trace_chunk_size) {
2185 methodHandle mhandle(THREAD, method);
2186 expand(CHECK);
2187 method = mhandle();
2188 }
2189
2190 _methods->ushort_at_put(_index, method->orig_method_idnum());
2191 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2192
2193 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2194 // klass owning the symbols alive so their refcounts aren't decremented.
2195 Symbol* name = method->name();
2196 _names->symbol_at_put(_index, name);
2197
2198 // We need to save the mirrors in the backtrace to keep the class
2199 // from being unloaded while we still have this stack trace.
2200 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2201 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2202 _index++;
2203 }
2204
2205 };
2206
2207 struct BacktraceElement : public StackObj {
2208 int _method_id;
2209 int _bci;
2210 int _version;
2211 Symbol* _name;
2212 Handle _mirror;
2213 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2214 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2215 };
2216
2217 class BacktraceIterator : public StackObj {
2218 int _index;
2219 objArrayHandle _result;
2220 objArrayHandle _mirrors;
2221 typeArrayHandle _methods;
2222 typeArrayHandle _bcis;
2223 typeArrayHandle _names;
2224
2225 void init(objArrayHandle result, Thread* thread) {
2226 // Get method id, bci, version and mirror from chunk
2227 _result = result;
2228 if (_result.not_null()) {
2229 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2230 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2231 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2232 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2233 _index = 0;
2234 }
2235 }
2236 public:
2237 BacktraceIterator(objArrayHandle result, Thread* thread) {
2238 init(result, thread);
2239 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2240 }
2241
2242 BacktraceElement next(Thread* thread) {
2243 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2244 _methods->ushort_at(_index),
2245 Backtrace::version_at(_bcis->int_at(_index)),
2246 Backtrace::bci_at(_bcis->int_at(_index)),
2247 _names->symbol_at(_index));
2248 _index++;
2249
2250 if (_index >= java_lang_Throwable::trace_chunk_size) {
2251 int next_offset = java_lang_Throwable::trace_next_offset;
2252 // Get next chunk
2253 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2254 init(result, thread);
2255 }
2256 return e;
2257 }
2258
2259 bool repeat() {
2260 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2261 }
2262 };
2263
2264
2265 // Print stack trace element to resource allocated buffer
2266 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2267 int version, int bci, Symbol* name) {
2268 ResourceMark rm;
2269
2270 // Get strings and string lengths
2271 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2272 const char* klass_name = holder->external_name();
2273 int buf_len = (int)strlen(klass_name);
2274
2275 char* method_name = name->as_C_string();
2276 buf_len += (int)strlen(method_name);
2277
2278 char* source_file_name = NULL;
2279 Symbol* source = Backtrace::get_source_file_name(holder, version);
2280 if (source != NULL) {
2281 source_file_name = source->as_C_string();
2282 buf_len += (int)strlen(source_file_name);
2283 }
2284
2285 char *module_name = NULL, *module_version = NULL;
2286 ModuleEntry* module = holder->module();
2287 if (module->is_named()) {
2288 module_name = module->name()->as_C_string();
2289 buf_len += (int)strlen(module_name);
2290 if (module->version() != NULL) {
2291 module_version = module->version()->as_C_string();
2292 buf_len += (int)strlen(module_version);
2293 }
2294 }
2295
2296 // Allocate temporary buffer with extra space for formatting and line number
2297 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2298
2299 // Print stack trace line in buffer
2300 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2301
2302 // Print module information
2303 if (module_name != NULL) {
2304 if (module_version != NULL) {
2305 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2306 } else {
2307 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2308 }
2309 }
2310
2311 // The method can be NULL if the requested class version is gone
2312 Method* method = holder->method_with_orig_idnum(method_id, version);
2313 if (!version_matches(method, version)) {
2314 strcat(buf, "Redefined)");
2315 } else {
2316 int line_number = Backtrace::get_line_number(method, bci);
2317 if (line_number == -2) {
2318 strcat(buf, "Native Method)");
2319 } else {
2320 if (source_file_name != NULL && (line_number != -1)) {
2321 // Sourcename and linenumber
2322 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2323 } else if (source_file_name != NULL) {
2324 // Just sourcename
2325 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2326 } else {
2327 // Neither sourcename nor linenumber
2328 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2329 }
2330 CompiledMethod* nm = method->code();
2331 if (WizardMode && nm != NULL) {
2332 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2333 }
2334 }
2335 }
2336
2337 st->print_cr("%s", buf);
2338 }
2339
2340 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2341 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2342 int method_id = method->orig_method_idnum();
2343 int version = method->constants()->version();
2344 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2345 }
2346
2347 /**
2348 * Print the throwable message and its stack trace plus all causes by walking the
2349 * cause chain. The output looks the same as of Throwable.printStackTrace().
2350 */
2351 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2352 // First, print the message.
2353 print(throwable(), st);
2354 st->cr();
2355
2356 // Now print the stack trace.
2357 Thread* THREAD = Thread::current();
2358 while (throwable.not_null()) {
2359 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2360 if (result.is_null()) {
2361 st->print_raw_cr("\t<<no stack trace available>>");
2362 return;
2363 }
2364 BacktraceIterator iter(result, THREAD);
2365
2366 while (iter.repeat()) {
2367 BacktraceElement bte = iter.next(THREAD);
2368 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2369 }
2370 {
2371 // Call getCause() which doesn't necessarily return the _cause field.
2372 EXCEPTION_MARK;
2373 JavaValue cause(T_OBJECT);
2374 JavaCalls::call_virtual(&cause,
2375 throwable,
2376 throwable->klass(),
2377 vmSymbols::getCause_name(),
2378 vmSymbols::void_throwable_signature(),
2379 THREAD);
2380 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2381 if (HAS_PENDING_EXCEPTION) {
2382 CLEAR_PENDING_EXCEPTION;
2383 throwable = Handle();
2384 } else {
2385 throwable = Handle(THREAD, (oop) cause.get_jobject());
2386 if (throwable.not_null()) {
2387 st->print("Caused by: ");
2388 print(throwable(), st);
2389 st->cr();
2390 }
2391 }
2392 }
2393 }
2394 }
2395
2396 /**
2397 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2398 */
2399 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2400 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2401 JavaValue result(T_VOID);
2402 JavaCalls::call_virtual(&result,
2403 throwable,
2404 SystemDictionary::Throwable_klass(),
2405 vmSymbols::printStackTrace_name(),
2406 vmSymbols::void_method_signature(),
2407 THREAD);
2408 }
2409
2410 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2411 if (!StackTraceInThrowable) return;
2412 ResourceMark rm(THREAD);
2413
2414 // Start out by clearing the backtrace for this object, in case the VM
2415 // runs out of memory while allocating the stack trace
2416 set_backtrace(throwable(), NULL);
2417 // Clear lazily constructed Java level stacktrace if refilling occurs
2418 // This is unnecessary in 1.7+ but harmless
2419 clear_stacktrace(throwable());
2420
2421 int max_depth = MaxJavaStackTraceDepth;
2422 JavaThread* thread = (JavaThread*)THREAD;
2423
2424 BacktraceBuilder bt(CHECK);
2425
2426 // If there is no Java frame just return the method that was being called
2427 // with bci 0
2428 if (!thread->has_last_Java_frame()) {
2429 if (max_depth >= 1 && method() != NULL) {
2430 bt.push(method(), 0, CHECK);
2431 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2432 set_depth(throwable(), 1);
2433 set_backtrace(throwable(), bt.backtrace());
2434 }
2435 return;
2436 }
2437
2438 // Instead of using vframe directly, this version of fill_in_stack_trace
2439 // basically handles everything by hand. This significantly improved the
2440 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2441 // See bug 6333838 for more details.
2442 // The "ASSERT" here is to verify this method generates the exactly same stack
2443 // trace as utilizing vframe.
2444 #ifdef ASSERT
2445 vframeStream st(thread);
2446 methodHandle st_method(THREAD, st.method());
2447 #endif
2448 int total_count = 0;
2449 RegisterMap map(thread, false);
2450 int decode_offset = 0;
2451 CompiledMethod* nm = NULL;
2452 bool skip_fillInStackTrace_check = false;
2453 bool skip_throwableInit_check = false;
2454 bool skip_hidden = !ShowHiddenFrames;
2455
2456 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2457 Method* method = NULL;
2458 int bci = 0;
2459
2460 // Compiled java method case.
2461 if (decode_offset != 0) {
2462 DebugInfoReadStream stream(nm, decode_offset);
2463 decode_offset = stream.read_int();
2464 method = (Method*)nm->metadata_at(stream.read_int());
2465 bci = stream.read_bci();
2466 } else {
2467 if (fr.is_first_frame()) break;
2468 address pc = fr.pc();
2469 if (fr.is_interpreted_frame()) {
2470 address bcp = fr.interpreter_frame_bcp();
2471 method = fr.interpreter_frame_method();
2472 bci = method->bci_from(bcp);
2473 fr = fr.sender(&map);
2474 } else {
2475 CodeBlob* cb = fr.cb();
2476 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2477 // but non nmethod
2478 fr = fr.sender(&map);
2479 if (cb == NULL || !cb->is_compiled()) {
2480 continue;
2481 }
2482 nm = cb->as_compiled_method();
2483 if (nm->method()->is_native()) {
2484 method = nm->method();
2485 bci = 0;
2486 } else {
2487 PcDesc* pd = nm->pc_desc_at(pc);
2488 decode_offset = pd->scope_decode_offset();
2489 // if decode_offset is not equal to 0, it will execute the
2490 // "compiled java method case" at the beginning of the loop.
2491 continue;
2492 }
2493 }
2494 }
2495 #ifdef ASSERT
2496 assert(st_method() == method && st.bci() == bci,
2497 "Wrong stack trace");
2498 st.next();
2499 // vframeStream::method isn't GC-safe so store off a copy
2500 // of the Method* in case we GC.
2501 if (!st.at_end()) {
2502 st_method = st.method();
2503 }
2504 #endif
2505
2506 // the format of the stacktrace will be:
2507 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2508 // - 0 or more <init> methods for the exception class (skipped)
2509 // - rest of the stack
2510
2511 if (!skip_fillInStackTrace_check) {
2512 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2513 throwable->is_a(method->method_holder())) {
2514 continue;
2515 }
2516 else {
2517 skip_fillInStackTrace_check = true; // gone past them all
2518 }
2519 }
2520 if (!skip_throwableInit_check) {
2521 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2522
2523 // skip <init> methods of the exception class and superclasses
2524 // This is similar to classic VM (before HotSpot).
2525 if (method->is_object_constructor() &&
2526 throwable->is_a(method->method_holder())) {
2527 continue;
2528 } else {
2529 // there are none or we've seen them all - either way stop checking
2530 skip_throwableInit_check = true;
2531 }
2532 }
2533 if (method->is_hidden()) {
2534 if (skip_hidden) continue;
2535 }
2536 bt.push(method, bci, CHECK);
2537 total_count++;
2538 }
2539
2540 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2541
2542 // Put completed stack trace into throwable object
2543 set_backtrace(throwable(), bt.backtrace());
2544 set_depth(throwable(), total_count);
2545 }
2546
2547 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2548 // No-op if stack trace is disabled
2549 if (!StackTraceInThrowable) {
2550 return;
2551 }
2552
2553 // Disable stack traces for some preallocated out of memory errors
2554 if (!Universe::should_fill_in_stack_trace(throwable)) {
2555 return;
2556 }
2557
2558 PRESERVE_EXCEPTION_MARK;
2559
2560 JavaThread* thread = JavaThread::active();
2561 fill_in_stack_trace(throwable, method, thread);
2562 // ignore exceptions thrown during stack trace filling
2563 CLEAR_PENDING_EXCEPTION;
2564 }
2565
2566 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2567 // Allocate stack trace - backtrace is created but not filled in
2568
2569 // No-op if stack trace is disabled
2570 if (!StackTraceInThrowable) return;
2571 BacktraceBuilder bt(CHECK); // creates a backtrace
2572 set_backtrace(throwable(), bt.backtrace());
2573 }
2574
2575
2576 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2577 // Fill in stack trace into preallocated backtrace (no GC)
2578
2579 // No-op if stack trace is disabled
2580 if (!StackTraceInThrowable) return;
2581
2582 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2583
2584 JavaThread* THREAD = JavaThread::current();
2585
2586 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2587 assert(backtrace.not_null(), "backtrace should have been preallocated");
2588
2589 ResourceMark rm(THREAD);
2590 vframeStream st(THREAD);
2591
2592 BacktraceBuilder bt(THREAD, backtrace);
2593
2594 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2595 // methods as preallocated errors aren't created by "java" code.
2596
2597 // fill in as much stack trace as possible
2598 int chunk_count = 0;
2599 for (;!st.at_end(); st.next()) {
2600 bt.push(st.method(), st.bci(), CHECK);
2601 chunk_count++;
2602
2603 // Bail-out for deep stacks
2604 if (chunk_count >= trace_chunk_size) break;
2605 }
2606 set_depth(throwable(), chunk_count);
2607 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2608
2609 // We support the Throwable immutability protocol defined for Java 7.
2610 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2611 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2612 }
2613
2614 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2615 objArrayHandle stack_trace_array_h, TRAPS) {
2616
2617 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2618 THROW(vmSymbols::java_lang_NullPointerException());
2619 }
2620
2621 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2622
2623 if (stack_trace_array_h->length() != depth(throwable())) {
2624 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2625 }
2626
2627 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2628 BacktraceIterator iter(result, THREAD);
2629
2630 int index = 0;
2631 while (iter.repeat()) {
2632 BacktraceElement bte = iter.next(THREAD);
2633
2634 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2635
2636 if (stack_trace_element.is_null()) {
2637 THROW(vmSymbols::java_lang_NullPointerException());
2638 }
2639
2640 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2641 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2642
2643 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2644 method,
2645 bte._version,
2646 bte._bci,
2647 bte._name, CHECK);
2648 }
2649 }
2650
2651 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2652 // Allocate java.lang.StackTraceElement instance
2653 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2654 assert(k != NULL, "must be loaded in 1.4+");
2655 if (k->should_be_initialized()) {
2656 k->initialize(CHECK_0);
2657 }
2658
2659 Handle element = k->allocate_instance_handle(CHECK_0);
2660
2661 int version = method->constants()->version();
2662 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2663 return element();
2664 }
2665
2666 void java_lang_StackTraceElement::fill_in(Handle element,
2667 InstanceKlass* holder, const methodHandle& method,
2668 int version, int bci, Symbol* name, TRAPS) {
2669 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2670
2671 ResourceMark rm(THREAD);
2672 HandleMark hm(THREAD);
2673
2674 // Fill in class name
2675 Handle java_class(THREAD, holder->java_mirror());
2676 oop classname = java_lang_Class::name(java_class, CHECK);
2677 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2678 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2679
2680 oop loader = holder->class_loader();
2681 if (loader != NULL) {
2682 oop loader_name = java_lang_ClassLoader::name(loader);
2683 if (loader_name != NULL)
2684 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2685 }
2686
2687 // Fill in method name
2688 oop methodname = StringTable::intern(name, CHECK);
2689 java_lang_StackTraceElement::set_methodName(element(), methodname);
2690
2691 // Fill in module name and version
2692 ModuleEntry* module = holder->module();
2693 if (module->is_named()) {
2694 oop module_name = StringTable::intern(module->name(), CHECK);
2695 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2696 oop module_version;
2697 if (module->version() != NULL) {
2698 module_version = StringTable::intern(module->version(), CHECK);
2699 } else {
2700 module_version = NULL;
2701 }
2702 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2703 }
2704
2705 if (method() == NULL || !version_matches(method(), version)) {
2706 // The method was redefined, accurate line number information isn't available
2707 java_lang_StackTraceElement::set_fileName(element(), NULL);
2708 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2709 } else {
2710 // Fill in source file name and line number.
2711 Symbol* source = Backtrace::get_source_file_name(holder, version);
2712 oop source_file = java_lang_Class::source_file(java_class());
2713 if (source != NULL) {
2714 // Class was not redefined. We can trust its cache if set,
2715 // else we have to initialize it.
2716 if (source_file == NULL) {
2717 source_file = StringTable::intern(source, CHECK);
2718 java_lang_Class::set_source_file(java_class(), source_file);
2719 }
2720 } else {
2721 // Class was redefined. Dump the cache if it was set.
2722 if (source_file != NULL) {
2723 source_file = NULL;
2724 java_lang_Class::set_source_file(java_class(), source_file);
2725 }
2726 if (ShowHiddenFrames) {
2727 source = vmSymbols::unknown_class_name();
2728 source_file = StringTable::intern(source, CHECK);
2729 }
2730 }
2731 java_lang_StackTraceElement::set_fileName(element(), source_file);
2732
2733 int line_number = Backtrace::get_line_number(method, bci);
2734 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2735 }
2736 }
2737
2738 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2739 HandleMark hm(THREAD);
2740 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2741 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2742 // we should expand MemberName::name when Throwable uses StackTrace
2743 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2744 return method;
2745 }
2746
2747 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2748 // set Method* or mid/cpref
2749 HandleMark hm(THREAD);
2750 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2751 InstanceKlass* ik = method->method_holder();
2752 CallInfo info(method(), ik, CHECK);
2753 MethodHandles::init_method_MemberName(mname, info);
2754 // set bci
2755 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2756 // method may be redefined; store the version
2757 int version = method->constants()->version();
2758 assert((jushort)version == version, "version should be short");
2759 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2760 }
2761
2762 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2763 ResourceMark rm(THREAD);
2764 HandleMark hm(THREAD);
2765 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2766 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2767 InstanceKlass* holder = InstanceKlass::cast(clazz);
2768 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2769
2770 short version = stackFrame->short_field(_version_offset);
2771 short bci = stackFrame->short_field(_bci_offset);
2772 Symbol* name = method->name();
2773 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2774 }
2775
2776 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2777 macro(_memberName_offset, k, "memberName", object_signature, false); \
2778 macro(_bci_offset, k, "bci", short_signature, false)
2779
2780 void java_lang_StackFrameInfo::compute_offsets() {
2781 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2782 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2783 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2784 }
2785
2786 #if INCLUDE_CDS
2787 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2788 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2789 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2790 }
2791 #endif
2792
2793 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2794 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2795 macro(_locals_offset, k, "locals", object_array_signature, false); \
2796 macro(_operands_offset, k, "operands", object_array_signature, false); \
2797 macro(_mode_offset, k, "mode", int_signature, false)
2798
2799 void java_lang_LiveStackFrameInfo::compute_offsets() {
2800 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2801 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2802 }
2803
2804 #if INCLUDE_CDS
2805 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2806 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2807 }
2808 #endif
2809
2810 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2811 macro(override_offset, k, "override", bool_signature, false)
2812
2813 void java_lang_reflect_AccessibleObject::compute_offsets() {
2814 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2815 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2816 }
2817
2818 #if INCLUDE_CDS
2819 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2820 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2821 }
2822 #endif
2823
2824 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2825 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2826 return (jboolean) reflect->bool_field(override_offset);
2827 }
2828
2829 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2830 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2831 reflect->bool_field_put(override_offset, (int) value);
2832 }
2833
2834 #define METHOD_FIELDS_DO(macro) \
2835 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2836 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2837 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2838 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2839 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2840 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2841 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2842 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2843 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2844 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2845 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2846
2847 void java_lang_reflect_Method::compute_offsets() {
2848 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2849 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2850 }
2851
2852 #if INCLUDE_CDS
2853 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2854 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2855 }
2856 #endif
2857
2858 Handle java_lang_reflect_Method::create(TRAPS) {
2859 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2860 Klass* klass = SystemDictionary::reflect_Method_klass();
2861 // This class is eagerly initialized during VM initialization, since we keep a refence
2862 // to one of the methods
2863 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2864 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2865 }
2866
2867 oop java_lang_reflect_Method::clazz(oop reflect) {
2868 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2869 return reflect->obj_field(clazz_offset);
2870 }
2871
2872 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2873 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2874 reflect->obj_field_put(clazz_offset, value);
2875 }
2876
2877 int java_lang_reflect_Method::slot(oop reflect) {
2878 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2879 return reflect->int_field(slot_offset);
2880 }
2881
2882 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2883 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2884 reflect->int_field_put(slot_offset, value);
2885 }
2886
2887 void java_lang_reflect_Method::set_name(oop method, oop value) {
2888 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2889 method->obj_field_put(name_offset, value);
2890 }
2891
2892 oop java_lang_reflect_Method::return_type(oop method) {
2893 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2894 return method->obj_field(returnType_offset);
2895 }
2896
2897 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2898 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2899 method->obj_field_put(returnType_offset, value);
2900 }
2901
2902 oop java_lang_reflect_Method::parameter_types(oop method) {
2903 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2904 return method->obj_field(parameterTypes_offset);
2905 }
2906
2907 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2908 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2909 method->obj_field_put(parameterTypes_offset, value);
2910 }
2911
2912 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2913 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2914 method->obj_field_put(exceptionTypes_offset, value);
2915 }
2916
2917 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2918 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2919 method->int_field_put(modifiers_offset, value);
2920 }
2921
2922 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2923 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2924 method->obj_field_put(signature_offset, value);
2925 }
2926
2927 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2928 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2929 method->obj_field_put(annotations_offset, value);
2930 }
2931
2932 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2933 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2934 method->obj_field_put(parameter_annotations_offset, value);
2935 }
2936
2937 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2938 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2939 method->obj_field_put(annotation_default_offset, value);
2940 }
2941
2942 #define CONSTRUCTOR_FIELDS_DO(macro) \
2943 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2944 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2945 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2946 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2947 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2948 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2949 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2950 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2951
2952 void java_lang_reflect_Constructor::compute_offsets() {
2953 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2954 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2955 }
2956
2957 #if INCLUDE_CDS
2958 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2959 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2960 }
2961 #endif
2962
2963 Handle java_lang_reflect_Constructor::create(TRAPS) {
2964 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2965 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2966 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2967 InstanceKlass* ik = InstanceKlass::cast(k);
2968 // Ensure it is initialized
2969 ik->initialize(CHECK_NH);
2970 return ik->allocate_instance_handle(THREAD);
2971 }
2972
2973 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2974 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2975 return reflect->obj_field(clazz_offset);
2976 }
2977
2978 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2979 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2980 reflect->obj_field_put(clazz_offset, value);
2981 }
2982
2983 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2984 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2985 return constructor->obj_field(parameterTypes_offset);
2986 }
2987
2988 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2989 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2990 constructor->obj_field_put(parameterTypes_offset, value);
2991 }
2992
2993 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2994 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2995 constructor->obj_field_put(exceptionTypes_offset, value);
2996 }
2997
2998 int java_lang_reflect_Constructor::slot(oop reflect) {
2999 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3000 return reflect->int_field(slot_offset);
3001 }
3002
3003 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3004 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3005 reflect->int_field_put(slot_offset, value);
3006 }
3007
3008 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3009 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3010 constructor->int_field_put(modifiers_offset, value);
3011 }
3012
3013 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3014 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3015 constructor->obj_field_put(signature_offset, value);
3016 }
3017
3018 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3019 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3020 constructor->obj_field_put(annotations_offset, value);
3021 }
3022
3023 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3024 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3025 method->obj_field_put(parameter_annotations_offset, value);
3026 }
3027
3028 #define FIELD_FIELDS_DO(macro) \
3029 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3030 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3031 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
3032 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3033 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3034 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3035 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3036
3037 void java_lang_reflect_Field::compute_offsets() {
3038 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3039 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3040 }
3041
3042 #if INCLUDE_CDS
3043 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3044 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3045 }
3046 #endif
3047
3048 Handle java_lang_reflect_Field::create(TRAPS) {
3049 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3050 Symbol* name = vmSymbols::java_lang_reflect_Field();
3051 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3052 InstanceKlass* ik = InstanceKlass::cast(k);
3053 // Ensure it is initialized
3054 ik->initialize(CHECK_NH);
3055 return ik->allocate_instance_handle(THREAD);
3056 }
3057
3058 oop java_lang_reflect_Field::clazz(oop reflect) {
3059 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3060 return reflect->obj_field(clazz_offset);
3061 }
3062
3063 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3064 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3065 reflect->obj_field_put(clazz_offset, value);
3066 }
3067
3068 oop java_lang_reflect_Field::name(oop field) {
3069 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3070 return field->obj_field(name_offset);
3071 }
3072
3073 void java_lang_reflect_Field::set_name(oop field, oop value) {
3074 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3075 field->obj_field_put(name_offset, value);
3076 }
3077
3078 oop java_lang_reflect_Field::type(oop field) {
3079 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3080 return field->obj_field(type_offset);
3081 }
3082
3083 void java_lang_reflect_Field::set_type(oop field, oop value) {
3084 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3085 field->obj_field_put(type_offset, value);
3086 }
3087
3088 int java_lang_reflect_Field::slot(oop reflect) {
3089 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3090 return reflect->int_field(slot_offset);
3091 }
3092
3093 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3094 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3095 reflect->int_field_put(slot_offset, value);
3096 }
3097
3098 int java_lang_reflect_Field::modifiers(oop field) {
3099 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3100 return field->int_field(modifiers_offset);
3101 }
3102
3103 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3104 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3105 field->int_field_put(modifiers_offset, value);
3106 }
3107
3108 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3109 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3110 field->obj_field_put(signature_offset, value);
3111 }
3112
3113 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3114 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3115 field->obj_field_put(annotations_offset, value);
3116 }
3117
3118 #define CONSTANTPOOL_FIELDS_DO(macro) \
3119 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3120
3121 void reflect_ConstantPool::compute_offsets() {
3122 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3123 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3124 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3125 }
3126
3127 #if INCLUDE_CDS
3128 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3129 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3130 }
3131 #endif
3132
3133 #define PARAMETER_FIELDS_DO(macro) \
3134 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3135 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3136 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3137 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3138
3139 void java_lang_reflect_Parameter::compute_offsets() {
3140 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3141 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3142 }
3143
3144 #if INCLUDE_CDS
3145 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3146 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3147 }
3148 #endif
3149
3150 Handle java_lang_reflect_Parameter::create(TRAPS) {
3151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3152 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3153 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3154 InstanceKlass* ik = InstanceKlass::cast(k);
3155 // Ensure it is initialized
3156 ik->initialize(CHECK_NH);
3157 return ik->allocate_instance_handle(THREAD);
3158 }
3159
3160 oop java_lang_reflect_Parameter::name(oop param) {
3161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3162 return param->obj_field(name_offset);
3163 }
3164
3165 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3166 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3167 param->obj_field_put(name_offset, value);
3168 }
3169
3170 int java_lang_reflect_Parameter::modifiers(oop param) {
3171 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3172 return param->int_field(modifiers_offset);
3173 }
3174
3175 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3176 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3177 param->int_field_put(modifiers_offset, value);
3178 }
3179
3180 int java_lang_reflect_Parameter::index(oop param) {
3181 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3182 return param->int_field(index_offset);
3183 }
3184
3185 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3186 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3187 param->int_field_put(index_offset, value);
3188 }
3189
3190 oop java_lang_reflect_Parameter::executable(oop param) {
3191 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3192 return param->obj_field(executable_offset);
3193 }
3194
3195 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3196 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3197 param->obj_field_put(executable_offset, value);
3198 }
3199
3200
3201 int java_lang_Module::loader_offset;
3202 int java_lang_Module::name_offset;
3203 int java_lang_Module::_module_entry_offset = -1;
3204
3205 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3206 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3207 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3208 vmSymbols::java_lang_module_init_signature(),
3209 loader, module_name, CHECK_NH);
3210 }
3211
3212 #define MODULE_FIELDS_DO(macro) \
3213 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3214 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3215
3216 void java_lang_Module::compute_offsets() {
3217 InstanceKlass* k = SystemDictionary::Module_klass();
3218 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3219 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3220 }
3221
3222 #if INCLUDE_CDS
3223 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3224 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3225 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3226 }
3227 #endif
3228
3229 oop java_lang_Module::loader(oop module) {
3230 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3231 return module->obj_field(loader_offset);
3232 }
3233
3234 void java_lang_Module::set_loader(oop module, oop value) {
3235 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3236 module->obj_field_put(loader_offset, value);
3237 }
3238
3239 oop java_lang_Module::name(oop module) {
3240 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3241 return module->obj_field(name_offset);
3242 }
3243
3244 void java_lang_Module::set_name(oop module, oop value) {
3245 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3246 module->obj_field_put(name_offset, value);
3247 }
3248
3249 ModuleEntry* java_lang_Module::module_entry(oop module) {
3250 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3251 assert(module != NULL, "module can't be null");
3252 assert(oopDesc::is_oop(module), "module must be oop");
3253
3254 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3255 if (module_entry == NULL) {
3256 // If the inject field containing the ModuleEntry* is null then return the
3257 // class loader's unnamed module.
3258 oop loader = java_lang_Module::loader(module);
3259 Handle h_loader = Handle(Thread::current(), loader);
3260 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3261 return loader_cld->unnamed_module();
3262 }
3263 return module_entry;
3264 }
3265
3266 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3267 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3268 assert(module != NULL, "module can't be null");
3269 assert(oopDesc::is_oop(module), "module must be oop");
3270 module->address_field_put(_module_entry_offset, (address)module_entry);
3271 }
3272
3273 Handle reflect_ConstantPool::create(TRAPS) {
3274 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3275 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3276 // Ensure it is initialized
3277 k->initialize(CHECK_NH);
3278 return k->allocate_instance_handle(THREAD);
3279 }
3280
3281
3282 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3283 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3284 oop mirror = value->pool_holder()->java_mirror();
3285 // Save the mirror to get back the constant pool.
3286 reflect->obj_field_put(_oop_offset, mirror);
3287 }
3288
3289 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3290 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3291
3292 oop mirror = reflect->obj_field(_oop_offset);
3293 Klass* k = java_lang_Class::as_Klass(mirror);
3294 assert(k->is_instance_klass(), "Must be");
3295
3296 // Get the constant pool back from the klass. Since class redefinition
3297 // merges the new constant pool into the old, this is essentially the
3298 // same constant pool as the original. If constant pool merging is
3299 // no longer done in the future, this will have to change to save
3300 // the original.
3301 return InstanceKlass::cast(k)->constants();
3302 }
3303
3304 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3305 macro(_base_offset, k, "base", object_signature, false)
3306
3307 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3308 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3309 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3310 }
3311
3312 #if INCLUDE_CDS
3313 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3314 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3315 }
3316 #endif
3317
3318 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3319 Klass* k = SystemDictionary::box_klass(type);
3320 if (k == NULL) return NULL;
3321 InstanceKlass* ik = InstanceKlass::cast(k);
3322 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3323 return ik->allocate_instance(THREAD);
3324 }
3325
3326
3327 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3328 oop box = initialize_and_allocate(type, CHECK_0);
3329 if (box == NULL) return NULL;
3330 switch (type) {
3331 case T_BOOLEAN:
3332 box->bool_field_put(value_offset, value->z);
3333 break;
3334 case T_CHAR:
3335 box->char_field_put(value_offset, value->c);
3336 break;
3337 case T_FLOAT:
3338 box->float_field_put(value_offset, value->f);
3339 break;
3340 case T_DOUBLE:
3341 box->double_field_put(long_value_offset, value->d);
3342 break;
3343 case T_BYTE:
3344 box->byte_field_put(value_offset, value->b);
3345 break;
3346 case T_SHORT:
3347 box->short_field_put(value_offset, value->s);
3348 break;
3349 case T_INT:
3350 box->int_field_put(value_offset, value->i);
3351 break;
3352 case T_LONG:
3353 box->long_field_put(long_value_offset, value->j);
3354 break;
3355 default:
3356 return NULL;
3357 }
3358 return box;
3359 }
3360
3361
3362 BasicType java_lang_boxing_object::basic_type(oop box) {
3363 if (box == NULL) return T_ILLEGAL;
3364 BasicType type = SystemDictionary::box_klass_type(box->klass());
3365 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3366 return T_ILLEGAL;
3367 return type;
3368 }
3369
3370
3371 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3372 BasicType type = SystemDictionary::box_klass_type(box->klass());
3373 switch (type) {
3374 case T_BOOLEAN:
3375 value->z = box->bool_field(value_offset);
3376 break;
3377 case T_CHAR:
3378 value->c = box->char_field(value_offset);
3379 break;
3380 case T_FLOAT:
3381 value->f = box->float_field(value_offset);
3382 break;
3383 case T_DOUBLE:
3384 value->d = box->double_field(long_value_offset);
3385 break;
3386 case T_BYTE:
3387 value->b = box->byte_field(value_offset);
3388 break;
3389 case T_SHORT:
3390 value->s = box->short_field(value_offset);
3391 break;
3392 case T_INT:
3393 value->i = box->int_field(value_offset);
3394 break;
3395 case T_LONG:
3396 value->j = box->long_field(long_value_offset);
3397 break;
3398 default:
3399 return T_ILLEGAL;
3400 } // end switch
3401 return type;
3402 }
3403
3404
3405 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3406 BasicType type = SystemDictionary::box_klass_type(box->klass());
3407 switch (type) {
3408 case T_BOOLEAN:
3409 box->bool_field_put(value_offset, value->z);
3410 break;
3411 case T_CHAR:
3412 box->char_field_put(value_offset, value->c);
3413 break;
3414 case T_FLOAT:
3415 box->float_field_put(value_offset, value->f);
3416 break;
3417 case T_DOUBLE:
3418 box->double_field_put(long_value_offset, value->d);
3419 break;
3420 case T_BYTE:
3421 box->byte_field_put(value_offset, value->b);
3422 break;
3423 case T_SHORT:
3424 box->short_field_put(value_offset, value->s);
3425 break;
3426 case T_INT:
3427 box->int_field_put(value_offset, value->i);
3428 break;
3429 case T_LONG:
3430 box->long_field_put(long_value_offset, value->j);
3431 break;
3432 default:
3433 return T_ILLEGAL;
3434 } // end switch
3435 return type;
3436 }
3437
3438
3439 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3440 switch (type) {
3441 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3442 case T_CHAR: st->print("%d", value->c); break;
3443 case T_BYTE: st->print("%d", value->b); break;
3444 case T_SHORT: st->print("%d", value->s); break;
3445 case T_INT: st->print("%d", value->i); break;
3446 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3447 case T_FLOAT: st->print("%f", value->f); break;
3448 case T_DOUBLE: st->print("%lf", value->d); break;
3449 default: st->print("type %d?", type); break;
3450 }
3451 }
3452
3453 // Support for java_lang_ref_Reference
3454
3455 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3456 assert(obj != NULL, "sanity");
3457 if (offset != java_lang_ref_Reference::referent_offset) {
3458 return false;
3459 }
3460
3461 Klass* k = obj->klass();
3462 if (!k->is_instance_klass()) {
3463 return false;
3464 }
3465
3466 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3467 bool is_reference = ik->reference_type() != REF_NONE;
3468 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3469 return is_reference;
3470 }
3471
3472 // Support for java_lang_ref_SoftReference
3473 //
3474
3475 #define SOFTREFERENCE_FIELDS_DO(macro) \
3476 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3477 macro(static_clock_offset, k, "clock", long_signature, true)
3478
3479 void java_lang_ref_SoftReference::compute_offsets() {
3480 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3481 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3482 }
3483
3484 #if INCLUDE_CDS
3485 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3486 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3487 }
3488 #endif
3489
3490 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3491 return ref->long_field(timestamp_offset);
3492 }
3493
3494 jlong java_lang_ref_SoftReference::clock() {
3495 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3496 oop base = ik->static_field_base_raw();
3497 return base->long_field(static_clock_offset);
3498 }
3499
3500 void java_lang_ref_SoftReference::set_clock(jlong value) {
3501 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3502 oop base = ik->static_field_base_raw();
3503 base->long_field_put(static_clock_offset, value);
3504 }
3505
3506 // Support for java_lang_invoke_DirectMethodHandle
3507
3508 int java_lang_invoke_DirectMethodHandle::_member_offset;
3509
3510 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3511 oop member_name = NULL;
3512 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3513 "a DirectMethodHandle oop is expected");
3514 return dmh->obj_field(member_offset_in_bytes());
3515 }
3516
3517 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3518 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3519
3520 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3521 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3522 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3523 }
3524
3525 #if INCLUDE_CDS
3526 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3527 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3528 }
3529 #endif
3530
3531 // Support for java_lang_invoke_MethodHandle
3532
3533 int java_lang_invoke_MethodHandle::_type_offset;
3534 int java_lang_invoke_MethodHandle::_form_offset;
3535
3536 int java_lang_invoke_MemberName::_clazz_offset;
3537 int java_lang_invoke_MemberName::_name_offset;
3538 int java_lang_invoke_MemberName::_type_offset;
3539 int java_lang_invoke_MemberName::_flags_offset;
3540 int java_lang_invoke_MemberName::_method_offset;
3541 int java_lang_invoke_MemberName::_vmindex_offset;
3542
3543 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3544 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3545
3546 int java_lang_invoke_LambdaForm::_vmentry_offset;
3547
3548 #define METHODHANDLE_FIELDS_DO(macro) \
3549 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3550 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3551
3552 void java_lang_invoke_MethodHandle::compute_offsets() {
3553 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3554 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3555 }
3556
3557 #if INCLUDE_CDS
3558 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3559 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3560 }
3561 #endif
3562
3563 #define MEMBERNAME_FIELDS_DO(macro) \
3564 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3565 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3566 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3567 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3568 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3569
3570 void java_lang_invoke_MemberName::compute_offsets() {
3571 InstanceKlass* k = SystemDictionary::MemberName_klass();
3572 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3573 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3574 }
3575
3576 #if INCLUDE_CDS
3577 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3578 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3579 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3580 }
3581 #endif
3582
3583 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3584 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3585 assert(k != NULL, "jdk mismatch");
3586 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3587 }
3588
3589 #if INCLUDE_CDS
3590 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3591 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3592 }
3593 #endif
3594
3595 #define LAMBDAFORM_FIELDS_DO(macro) \
3596 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3597
3598 void java_lang_invoke_LambdaForm::compute_offsets() {
3599 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3600 assert (k != NULL, "jdk mismatch");
3601 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3602 }
3603
3604 #if INCLUDE_CDS
3605 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3606 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3607 }
3608 #endif
3609
3610 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3611 return obj != NULL && is_subclass(obj->klass());
3612 }
3613
3614
3615 oop java_lang_invoke_MethodHandle::type(oop mh) {
3616 return mh->obj_field(_type_offset);
3617 }
3618
3619 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3620 mh->obj_field_put(_type_offset, mtype);
3621 }
3622
3623 oop java_lang_invoke_MethodHandle::form(oop mh) {
3624 assert(_form_offset != 0, "");
3625 return mh->obj_field(_form_offset);
3626 }
3627
3628 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3629 assert(_form_offset != 0, "");
3630 mh->obj_field_put(_form_offset, lform);
3631 }
3632
3633 /// MemberName accessors
3634
3635 oop java_lang_invoke_MemberName::clazz(oop mname) {
3636 assert(is_instance(mname), "wrong type");
3637 return mname->obj_field(_clazz_offset);
3638 }
3639
3640 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3641 assert(is_instance(mname), "wrong type");
3642 mname->obj_field_put(_clazz_offset, clazz);
3643 }
3644
3645 oop java_lang_invoke_MemberName::name(oop mname) {
3646 assert(is_instance(mname), "wrong type");
3647 return mname->obj_field(_name_offset);
3648 }
3649
3650 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3651 assert(is_instance(mname), "wrong type");
3652 mname->obj_field_put(_name_offset, name);
3653 }
3654
3655 oop java_lang_invoke_MemberName::type(oop mname) {
3656 assert(is_instance(mname), "wrong type");
3657 return mname->obj_field(_type_offset);
3658 }
3659
3660 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3661 assert(is_instance(mname), "wrong type");
3662 mname->obj_field_put(_type_offset, type);
3663 }
3664
3665 int java_lang_invoke_MemberName::flags(oop mname) {
3666 assert(is_instance(mname), "wrong type");
3667 return mname->int_field(_flags_offset);
3668 }
3669
3670 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3671 assert(is_instance(mname), "wrong type");
3672 mname->int_field_put(_flags_offset, flags);
3673 }
3674
3675
3676 // Return vmtarget from ResolvedMethodName method field through indirection
3677 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3678 assert(is_instance(mname), "wrong type");
3679 oop method = mname->obj_field(_method_offset);
3680 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3681 }
3682
3683 bool java_lang_invoke_MemberName::is_method(oop mname) {
3684 assert(is_instance(mname), "must be MemberName");
3685 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3686 }
3687
3688 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3689 assert(is_instance(mname), "wrong type");
3690 mname->obj_field_put(_method_offset, resolved_method);
3691 }
3692
3693 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3694 assert(is_instance(mname), "wrong type");
3695 return (intptr_t) mname->address_field(_vmindex_offset);
3696 }
3697
3698 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3699 assert(is_instance(mname), "wrong type");
3700 mname->address_field_put(_vmindex_offset, (address) index);
3701 }
3702
3703
3704 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3705 assert(is_instance(resolved_method), "wrong type");
3706 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3707 assert(m->is_method(), "must be");
3708 return m;
3709 }
3710
3711 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3712 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3713 assert(is_instance(resolved_method), "wrong type");
3714 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3715 }
3716
3717 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3718 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3719 oop resolved_method = ResolvedMethodTable::find_method(m());
3720 if (resolved_method == NULL) {
3721 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3722 if (!k->is_initialized()) {
3723 k->initialize(CHECK_NULL);
3724 }
3725 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3726 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3727 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3728 // distinct loaders) to ensure the metadata is kept alive.
3729 // This mirror may be different than the one in clazz field.
3730 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3731 resolved_method = ResolvedMethodTable::add_method(m, Handle(THREAD, new_resolved_method));
3732 }
3733 return resolved_method;
3734 }
3735
3736 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3737 assert(is_instance(lform), "wrong type");
3738 return lform->obj_field(_vmentry_offset);
3739 }
3740
3741
3742 // Support for java_lang_invoke_MethodType
3743
3744 int java_lang_invoke_MethodType::_rtype_offset;
3745 int java_lang_invoke_MethodType::_ptypes_offset;
3746
3747 #define METHODTYPE_FIELDS_DO(macro) \
3748 macro(_rtype_offset, k, "rtype", class_signature, false); \
3749 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3750
3751 void java_lang_invoke_MethodType::compute_offsets() {
3752 InstanceKlass* k = SystemDictionary::MethodType_klass();
3753 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3754 }
3755
3756 #if INCLUDE_CDS
3757 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3758 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3759 }
3760 #endif
3761
3762 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3763 st->print("(");
3764 objArrayOop pts = ptypes(mt);
3765 for (int i = 0, limit = pts->length(); i < limit; i++) {
3766 java_lang_Class::print_signature(pts->obj_at(i), st);
3767 }
3768 st->print(")");
3769 java_lang_Class::print_signature(rtype(mt), st);
3770 }
3771
3772 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3773 ResourceMark rm;
3774 stringStream buffer(128);
3775 print_signature(mt, &buffer);
3776 const char* sigstr = buffer.base();
3777 int siglen = (int) buffer.size();
3778 Symbol *name;
3779 if (!intern_if_not_found) {
3780 name = SymbolTable::probe(sigstr, siglen);
3781 } else {
3782 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3783 }
3784 return name;
3785 }
3786
3787 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3788 if (oopDesc::equals(mt1, mt2))
3789 return true;
3790 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3791 return false;
3792 if (ptype_count(mt1) != ptype_count(mt2))
3793 return false;
3794 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3795 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3796 return false;
3797 }
3798 return true;
3799 }
3800
3801 oop java_lang_invoke_MethodType::rtype(oop mt) {
3802 assert(is_instance(mt), "must be a MethodType");
3803 return mt->obj_field(_rtype_offset);
3804 }
3805
3806 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3807 assert(is_instance(mt), "must be a MethodType");
3808 return (objArrayOop) mt->obj_field(_ptypes_offset);
3809 }
3810
3811 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3812 return ptypes(mt)->obj_at(idx);
3813 }
3814
3815 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3816 return ptypes(mt)->length();
3817 }
3818
3819 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3820 objArrayOop pts = ptypes(mt);
3821 int count = pts->length();
3822 int slots = 0;
3823 for (int i = 0; i < count; i++) {
3824 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3825 slots += type2size[bt];
3826 }
3827 return slots;
3828 }
3829
3830 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3831 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3832 return type2size[bt];
3833 }
3834
3835
3836 // Support for java_lang_invoke_CallSite
3837
3838 int java_lang_invoke_CallSite::_target_offset;
3839 int java_lang_invoke_CallSite::_context_offset;
3840
3841 #define CALLSITE_FIELDS_DO(macro) \
3842 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3843 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3844
3845 void java_lang_invoke_CallSite::compute_offsets() {
3846 InstanceKlass* k = SystemDictionary::CallSite_klass();
3847 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3848 }
3849
3850 #if INCLUDE_CDS
3851 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3852 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3853 }
3854 #endif
3855
3856 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3857 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3858
3859 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3860 return dep_oop;
3861 }
3862
3863 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3864
3865 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3866 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3867
3868 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3869 InstanceKlass* k = SystemDictionary::Context_klass();
3870 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3871 }
3872
3873 #if INCLUDE_CDS
3874 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3875 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3876 }
3877 #endif
3878
3879 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3880 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3881 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3882 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3883 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3884 return dep_ctx;
3885 }
3886
3887 // Support for java_security_AccessControlContext
3888
3889 int java_security_AccessControlContext::_context_offset = 0;
3890 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3891 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3892 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3893
3894 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3895 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3896 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3897 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3898 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3899
3900 void java_security_AccessControlContext::compute_offsets() {
3901 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3902 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3903 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3904 }
3905
3906 #if INCLUDE_CDS
3907 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3908 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3909 }
3910 #endif
3911
3912 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3913 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3914 // Ensure klass is initialized
3915 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3916 // Allocate result
3917 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3918 // Fill in values
3919 result->obj_field_put(_context_offset, context());
3920 result->obj_field_put(_privilegedContext_offset, privileged_context());
3921 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3922 // whitelist AccessControlContexts created by the JVM if present
3923 if (_isAuthorized_offset != -1) {
3924 result->bool_field_put(_isAuthorized_offset, true);
3925 }
3926 return result;
3927 }
3928
3929
3930 // Support for java_lang_ClassLoader
3931
3932 bool java_lang_ClassLoader::offsets_computed = false;
3933 int java_lang_ClassLoader::_loader_data_offset = -1;
3934 int java_lang_ClassLoader::parallelCapable_offset = -1;
3935 int java_lang_ClassLoader::name_offset = -1;
3936 int java_lang_ClassLoader::nameAndId_offset = -1;
3937 int java_lang_ClassLoader::unnamedModule_offset = -1;
3938
3939 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3940 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3941 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3942 }
3943
3944 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3945 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3946 return RawAccess<>::load_at(loader, _loader_data_offset);
3947 }
3948
3949 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3950 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3951 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3952 }
3953
3954 #define CLASSLOADER_FIELDS_DO(macro) \
3955 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3956 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3957 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3958 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3959 macro(parent_offset, k1, "parent", classloader_signature, false)
3960
3961 void java_lang_ClassLoader::compute_offsets() {
3962 assert(!offsets_computed, "offsets should be initialized only once");
3963 offsets_computed = true;
3964
3965 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3966 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3967
3968 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3969 }
3970
3971 #if INCLUDE_CDS
3972 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3973 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3974 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3975 }
3976 #endif
3977
3978 oop java_lang_ClassLoader::parent(oop loader) {
3979 assert(is_instance(loader), "loader must be oop");
3980 return loader->obj_field(parent_offset);
3981 }
3982
3983 // Returns the name field of this class loader. If the name field has not
3984 // been set, null will be returned.
3985 oop java_lang_ClassLoader::name(oop loader) {
3986 assert(is_instance(loader), "loader must be oop");
3987 return loader->obj_field(name_offset);
3988 }
3989
3990 // Returns the nameAndId field of this class loader. The format is
3991 // as follows:
3992 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
3993 // If the defining loader has no name then <qualified-class-name> @<id>
3994 // If built-in loader, then omit '@<id>' as there is only one instance.
3995 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
3996 oop java_lang_ClassLoader::nameAndId(oop loader) {
3997 assert(is_instance(loader), "loader must be oop");
3998 return loader->obj_field(nameAndId_offset);
3999 }
4000
4001 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4002 assert(is_instance(loader), "loader must be oop");
4003 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
4004 oop acl = loader;
4005 debug_only(jint loop_count = 0);
4006 // This loop taken verbatim from ClassLoader.java:
4007 do {
4008 acl = parent(acl);
4009 if (oopDesc::equals(cl, acl)) {
4010 return true;
4011 }
4012 assert(++loop_count > 0, "loop_count overflow");
4013 } while (acl != NULL);
4014 return false;
4015 }
4016
4017 bool java_lang_ClassLoader::is_instance(oop obj) {
4018 return obj != NULL && is_subclass(obj->klass());
4019 }
4020
4021
4022 // For class loader classes, parallelCapable defined
4023 // based on non-null field
4024 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4025 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4026 if (parallelCapable_offset == -1) {
4027 // Default for backward compatibility is false
4028 return false;
4029 }
4030 return (class_loader->obj_field(parallelCapable_offset) != NULL);
4031 }
4032
4033 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4034 // Fix for 4474172; see evaluation for more details
4035 loader = non_reflection_class_loader(loader);
4036
4037 oop cl = SystemDictionary::java_system_loader();
4038 while(cl != NULL) {
4039 if (oopDesc::equals(cl, loader)) return true;
4040 cl = parent(cl);
4041 }
4042 return false;
4043 }
4044
4045 // Return true if this is one of the class loaders associated with
4046 // the generated bytecodes for reflection.
4047 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4048 if (loader != NULL) {
4049 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4050 // This might be null in non-1.4 JDKs
4051 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4052 }
4053 return false;
4054 }
4055
4056 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4057 // See whether this is one of the class loaders associated with
4058 // the generated bytecodes for reflection, and if so, "magically"
4059 // delegate to its parent to prevent class loading from occurring
4060 // in places where applications using reflection didn't expect it.
4061 if (is_reflection_class_loader(loader)) {
4062 return parent(loader);
4063 }
4064 return loader;
4065 }
4066
4067 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4068 assert(is_instance(loader), "loader must be oop");
4069 return loader->obj_field(unnamedModule_offset);
4070 }
4071
4072 // Support for java_lang_System
4073 //
4074 #define SYSTEM_FIELDS_DO(macro) \
4075 macro(static_in_offset, k, "in", input_stream_signature, true); \
4076 macro(static_out_offset, k, "out", print_stream_signature, true); \
4077 macro(static_err_offset, k, "err", print_stream_signature, true); \
4078 macro(static_security_offset, k, "security", security_manager_signature, true)
4079
4080 void java_lang_System::compute_offsets() {
4081 InstanceKlass* k = SystemDictionary::System_klass();
4082 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4083 }
4084
4085 #if INCLUDE_CDS
4086 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4087 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4088 }
4089 #endif
4090
4091 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4092 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4093 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4094
4095 // Support for jdk_internal_misc_UnsafeConstants
4096 //
4097 class UnsafeConstantsFixup : public FieldClosure {
4098 private:
4099 int _address_size;
4100 int _page_size;
4101 bool _big_endian;
4102 bool _use_unaligned_access;
4103 public:
4104 UnsafeConstantsFixup() {
4105 // round up values for all static final fields
4106 _address_size = sizeof(void*);
4107 _page_size = os::vm_page_size();
4108 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4109 _use_unaligned_access = UseUnalignedAccesses;
4110 }
4111
4112 void do_field(fieldDescriptor* fd) {
4113 oop mirror = fd->field_holder()->java_mirror();
4114 assert(mirror != NULL, "UnsafeConstants must have mirror already");
4115 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4116 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4117 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4118 if (fd->name() == vmSymbols::address_size_name()) {
4119 mirror->int_field_put(fd->offset(), _address_size);
4120 } else if (fd->name() == vmSymbols::page_size_name()) {
4121 mirror->int_field_put(fd->offset(), _page_size);
4122 } else if (fd->name() == vmSymbols::big_endian_name()) {
4123 mirror->bool_field_put(fd->offset(), _big_endian);
4124 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4125 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4126 } else {
4127 assert(false, "unexpected UnsafeConstants field");
4128 }
4129 }
4130 };
4131
4132 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4133 UnsafeConstantsFixup fixup;
4134 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4135 }
4136
4137 int java_lang_Class::_klass_offset;
4138 int java_lang_Class::_array_klass_offset;
4139 int java_lang_Class::_oop_size_offset;
4140 int java_lang_Class::_static_oop_field_count_offset;
4141 int java_lang_Class::_class_loader_offset;
4142 int java_lang_Class::_module_offset;
4143 int java_lang_Class::_protection_domain_offset;
4144 int java_lang_Class::_component_mirror_offset;
4145 int java_lang_Class::_inline_mirror_offset;
4146 int java_lang_Class::_nullable_mirror_offset;
4147 int java_lang_Class::_init_lock_offset;
4148 int java_lang_Class::_signers_offset;
4149 int java_lang_Class::_name_offset;
4150 int java_lang_Class::_source_file_offset;
4151 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4152 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4153 int java_lang_Throwable::backtrace_offset;
4154 int java_lang_Throwable::detailMessage_offset;
4155 int java_lang_Throwable::stackTrace_offset;
4156 int java_lang_Throwable::depth_offset;
4157 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4158 int java_lang_reflect_AccessibleObject::override_offset;
4159 int java_lang_reflect_Method::clazz_offset;
4160 int java_lang_reflect_Method::name_offset;
4161 int java_lang_reflect_Method::returnType_offset;
4162 int java_lang_reflect_Method::parameterTypes_offset;
4163 int java_lang_reflect_Method::exceptionTypes_offset;
4164 int java_lang_reflect_Method::slot_offset;
4165 int java_lang_reflect_Method::modifiers_offset;
4166 int java_lang_reflect_Method::signature_offset;
4167 int java_lang_reflect_Method::annotations_offset;
4168 int java_lang_reflect_Method::parameter_annotations_offset;
4169 int java_lang_reflect_Method::annotation_default_offset;
4170 int java_lang_reflect_Constructor::clazz_offset;
4171 int java_lang_reflect_Constructor::parameterTypes_offset;
4172 int java_lang_reflect_Constructor::exceptionTypes_offset;
4173 int java_lang_reflect_Constructor::slot_offset;
4174 int java_lang_reflect_Constructor::modifiers_offset;
4175 int java_lang_reflect_Constructor::signature_offset;
4176 int java_lang_reflect_Constructor::annotations_offset;
4177 int java_lang_reflect_Constructor::parameter_annotations_offset;
4178 int java_lang_reflect_Field::clazz_offset;
4179 int java_lang_reflect_Field::name_offset;
4180 int java_lang_reflect_Field::type_offset;
4181 int java_lang_reflect_Field::slot_offset;
4182 int java_lang_reflect_Field::modifiers_offset;
4183 int java_lang_reflect_Field::signature_offset;
4184 int java_lang_reflect_Field::annotations_offset;
4185 int java_lang_reflect_Parameter::name_offset;
4186 int java_lang_reflect_Parameter::modifiers_offset;
4187 int java_lang_reflect_Parameter::index_offset;
4188 int java_lang_reflect_Parameter::executable_offset;
4189 int java_lang_boxing_object::value_offset;
4190 int java_lang_boxing_object::long_value_offset;
4191 int java_lang_ref_Reference::referent_offset;
4192 int java_lang_ref_Reference::queue_offset;
4193 int java_lang_ref_Reference::next_offset;
4194 int java_lang_ref_Reference::discovered_offset;
4195 int java_lang_ref_SoftReference::timestamp_offset;
4196 int java_lang_ref_SoftReference::static_clock_offset;
4197 int java_lang_ClassLoader::parent_offset;
4198 int java_lang_System::static_in_offset;
4199 int java_lang_System::static_out_offset;
4200 int java_lang_System::static_err_offset;
4201 int java_lang_System::static_security_offset;
4202 int java_lang_StackTraceElement::methodName_offset;
4203 int java_lang_StackTraceElement::fileName_offset;
4204 int java_lang_StackTraceElement::lineNumber_offset;
4205 int java_lang_StackTraceElement::moduleName_offset;
4206 int java_lang_StackTraceElement::moduleVersion_offset;
4207 int java_lang_StackTraceElement::classLoaderName_offset;
4208 int java_lang_StackTraceElement::declaringClass_offset;
4209 int java_lang_StackTraceElement::declaringClassObject_offset;
4210 int java_lang_StackFrameInfo::_memberName_offset;
4211 int java_lang_StackFrameInfo::_bci_offset;
4212 int java_lang_StackFrameInfo::_version_offset;
4213 int java_lang_LiveStackFrameInfo::_monitors_offset;
4214 int java_lang_LiveStackFrameInfo::_locals_offset;
4215 int java_lang_LiveStackFrameInfo::_operands_offset;
4216 int java_lang_LiveStackFrameInfo::_mode_offset;
4217 int java_lang_AssertionStatusDirectives::classes_offset;
4218 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4219 int java_lang_AssertionStatusDirectives::packages_offset;
4220 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4221 int java_lang_AssertionStatusDirectives::deflt_offset;
4222 int java_nio_Buffer::_limit_offset;
4223 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4224 int reflect_ConstantPool::_oop_offset;
4225 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4226
4227
4228 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4229 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4230 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4231 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4232 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4233 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4234 macro(methodName_offset, k, "methodName", string_signature, false); \
4235 macro(fileName_offset, k, "fileName", string_signature, false); \
4236 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4237
4238 // Support for java_lang_StackTraceElement
4239 void java_lang_StackTraceElement::compute_offsets() {
4240 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4241 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4242 }
4243
4244 #if INCLUDE_CDS
4245 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4246 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4247 }
4248 #endif
4249
4250 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4251 element->obj_field_put(fileName_offset, value);
4252 }
4253
4254 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4255 element->obj_field_put(declaringClass_offset, value);
4256 }
4257
4258 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4259 element->obj_field_put(methodName_offset, value);
4260 }
4261
4262 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4263 element->int_field_put(lineNumber_offset, value);
4264 }
4265
4266 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4267 element->obj_field_put(moduleName_offset, value);
4268 }
4269
4270 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4271 element->obj_field_put(moduleVersion_offset, value);
4272 }
4273
4274 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4275 element->obj_field_put(classLoaderName_offset, value);
4276 }
4277
4278 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4279 element->obj_field_put(declaringClassObject_offset, value);
4280 }
4281
4282 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4283 element->short_field_put(_version_offset, value);
4284 }
4285
4286 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4287 element->int_field_put(_bci_offset, value);
4288 }
4289
4290 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4291 element->obj_field_put(_monitors_offset, value);
4292 }
4293
4294 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4295 element->obj_field_put(_locals_offset, value);
4296 }
4297
4298 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4299 element->obj_field_put(_operands_offset, value);
4300 }
4301
4302 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4303 element->int_field_put(_mode_offset, value);
4304 }
4305
4306 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4307 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4308 macro(classes_offset, k, "classes", string_array_signature, false); \
4309 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4310 macro(packages_offset, k, "packages", string_array_signature, false); \
4311 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4312 macro(deflt_offset, k, "deflt", bool_signature, false)
4313
4314 void java_lang_AssertionStatusDirectives::compute_offsets() {
4315 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4316 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4317 }
4318
4319 #if INCLUDE_CDS
4320 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4321 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4322 }
4323 #endif
4324
4325 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4326 o->obj_field_put(classes_offset, val);
4327 }
4328
4329 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4330 o->obj_field_put(classEnabled_offset, val);
4331 }
4332
4333 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4334 o->obj_field_put(packages_offset, val);
4335 }
4336
4337 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4338 o->obj_field_put(packageEnabled_offset, val);
4339 }
4340
4341 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4342 o->bool_field_put(deflt_offset, val);
4343 }
4344
4345
4346 // Support for intrinsification of java.nio.Buffer.checkIndex
4347 int java_nio_Buffer::limit_offset() {
4348 return _limit_offset;
4349 }
4350
4351 #define BUFFER_FIELDS_DO(macro) \
4352 macro(_limit_offset, k, "limit", int_signature, false)
4353
4354 void java_nio_Buffer::compute_offsets() {
4355 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4356 assert(k != NULL, "must be loaded in 1.4+");
4357 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4358 }
4359
4360 #if INCLUDE_CDS
4361 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4362 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4363 }
4364 #endif
4365
4366 #define AOS_FIELDS_DO(macro) \
4367 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4368
4369 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4370 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4371 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4372 }
4373
4374 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4375 assert(_owner_offset != 0, "Must be initialized");
4376 return obj->obj_field(_owner_offset);
4377 }
4378
4379 #if INCLUDE_CDS
4380 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4381 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4382 }
4383 #endif
4384
4385 static int member_offset(int hardcoded_offset) {
4386 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4387 }
4388
4389 // Compute hard-coded offsets
4390 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4391 // are not available to determine the offset_of_static_fields.
4392 void JavaClasses::compute_hard_coded_offsets() {
4393
4394 // java_lang_boxing_object
4395 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4396 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4397
4398 // java_lang_ref_Reference
4399 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4400 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4401 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4402 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4403 }
4404
4405 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4406
4407 // Compute non-hard-coded field offsets of all the classes in this file
4408 void JavaClasses::compute_offsets() {
4409 if (UseSharedSpaces) {
4410 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4411 JvmtiExport::has_early_class_hook_env()),
4412 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4413 // None of the classes used by the rest of this function can be replaced by
4414 // JMVTI ClassFileLoadHook.
4415 // We are safe to use the archived offsets, which have already been restored
4416 // by JavaClasses::serialize_offsets, without computing the offsets again.
4417 return;
4418 }
4419
4420 // We have already called the compute_offsets() of the
4421 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4422 // earlier inside SystemDictionary::resolve_well_known_classes()
4423 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4424
4425 // generated interpreter code wants to know about the offsets we just computed:
4426 AbstractAssembler::update_delayed_values();
4427 }
4428
4429 #if INCLUDE_CDS
4430 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4431
4432 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4433 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4434 }
4435 #endif
4436
4437
4438 #ifndef PRODUCT
4439
4440 // These functions exist to assert the validity of hard-coded field offsets to guard
4441 // against changes in the class files
4442
4443 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4444 EXCEPTION_MARK;
4445 fieldDescriptor fd;
4446 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4447 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4448 InstanceKlass* ik = InstanceKlass::cast(k);
4449 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4450 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4451 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4452 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4453 return false;
4454 }
4455 if (fd.is_static()) {
4456 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4457 return false;
4458 }
4459 if (fd.offset() == hardcoded_offset ) {
4460 return true;
4461 } else {
4462 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4463 klass_name, field_name, hardcoded_offset, fd.offset());
4464 return false;
4465 }
4466 }
4467
4468 // Check the hard-coded field offsets of all the classes in this file
4469
4470 void JavaClasses::check_offsets() {
4471 bool valid = true;
4472
4473 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4474 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4475
4476 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4477 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4478
4479 // Boxed primitive objects (java_lang_boxing_object)
4480
4481 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4482 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4483 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4484 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4485 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4486 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4487 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4488 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4489
4490 // java.lang.ref.Reference
4491
4492 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4493 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4494 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4495 // Fake field
4496 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4497
4498 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4499 }
4500
4501 #endif // PRODUCT
4502
4503 int InjectedField::compute_offset() {
4504 InstanceKlass* ik = InstanceKlass::cast(klass());
4505 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4506 if (!may_be_java && !fs.access_flags().is_internal()) {
4507 // Only look at injected fields
4508 continue;
4509 }
4510 if (fs.name() == name() && fs.signature() == signature()) {
4511 return fs.offset();
4512 }
4513 }
4514 ResourceMark rm;
4515 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)" : "");
4516 #ifndef PRODUCT
4517 ik->print();
4518 tty->print_cr("all fields:");
4519 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4520 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4521 }
4522 #endif //PRODUCT
4523 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4524 return -1;
4525 }
4526
4527 void javaClasses_init() {
4528 JavaClasses::compute_offsets();
4529 JavaClasses::check_offsets();
4530 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4531 }