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 if (element_klass->is_value()) {
929 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(element_klass));
930 comp_mirror = Handle(THREAD, vk->value_mirror());
931 } else {
932 comp_mirror = Handle(THREAD, element_klass->java_mirror());
933 }
934 }
935 else if (k->is_typeArray_klass()) {
936 BasicType type = TypeArrayKlass::cast(k)->element_type();
937 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
938 } else {
939 assert(k->is_objArray_klass(), "Must be");
940 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
941 assert(element_klass != NULL, "Must have an element klass");
942 if (element_klass->is_value()) {
943 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(element_klass));
944 comp_mirror = Handle(THREAD, vk->value_mirror());
945 } else {
946 comp_mirror = Handle(THREAD, element_klass->java_mirror());
947 }
948 }
949 assert(comp_mirror() != NULL, "must have a mirror");
950
951 // Two-way link between the array klass and its component mirror:
952 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
953 set_component_mirror(mirror(), comp_mirror());
954 // See below for ordering dependencies between field array_klass in component mirror
955 // and java_mirror in this klass.
956 } else {
957 assert(k->is_instance_klass(), "Must be");
958
959 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
960 if (HAS_PENDING_EXCEPTION) {
961 // If any of the fields throws an exception like OOM remove the klass field
962 // from the mirror so GC doesn't follow it after the klass has been deallocated.
963 // This mirror looks like a primitive type, which logically it is because it
964 // it represents no class.
965 java_lang_Class::set_klass(mirror(), NULL);
966 return;
967 }
968 }
969
970 // set the classLoader field in the java_lang_Class instance
971 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
972 set_class_loader(mirror(), class_loader());
973
974 // Setup indirection from klass->mirror
975 // after any exceptions can happen during allocations.
976 k->set_java_mirror(mirror);
977
978 // Set the module field in the java_lang_Class instance. This must be done
979 // after the mirror is set.
980 set_mirror_module_field(k, mirror, module, THREAD);
981
982 if (comp_mirror() != NULL) {
983 // Set after k->java_mirror() is published, because compiled code running
984 // concurrently doesn't expect a k to have a null java_mirror.
985 release_set_array_klass(comp_mirror(), k);
986 }
987
988 if (k->is_value()) {
989 // create the secondary mirror for value class
990 oop value_mirror_oop = create_value_mirror(k, mirror, CHECK);
991 set_box_mirror(mirror(), mirror());
992 set_value_mirror(mirror(), value_mirror_oop);
993 }
994 } else {
995 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
996 fixup_mirror_list()->push(k);
997 }
998 }
999
1000 // Create the secondary mirror for value type. Sets all the fields of this java.lang.Class
1001 // instance with the same value as the primary mirror except signers.
1002 // Class::setSigners and getSigners will use the primary mirror when passed to the JVM.
1003 oop java_lang_Class::create_value_mirror(Klass* k, Handle mirror, TRAPS) {
1004 // Allocate mirror (java.lang.Class instance)
1005 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0);
1006 Handle value_mirror(THREAD, mirror_oop);
1007
1008 java_lang_Class::set_klass(value_mirror(), k);
1009 java_lang_Class::set_static_oop_field_count(value_mirror(), static_oop_field_count(mirror()));
1010 // ## do we need to set init lock?
1011 java_lang_Class::set_init_lock(value_mirror(), init_lock(mirror()));
1012
1013 if (k->is_array_klass()) {
1014 assert(component_mirror(mirror()) != NULL, "must have a mirror");
1015 set_component_mirror(value_mirror(), component_mirror(mirror()));
1016 }
1017
1018 set_protection_domain(value_mirror(), protection_domain(mirror()));
1019 set_class_loader(value_mirror(), class_loader(mirror()));
1020 // ## handle if java.base is not yet defined
1021 set_module(value_mirror(), module(mirror()));
1022 set_box_mirror(value_mirror(), mirror());
1023 set_value_mirror(value_mirror(), value_mirror());
1024 return value_mirror();
1025 }
1026
1027 #if INCLUDE_CDS_JAVA_HEAP
1028 // Clears mirror fields. Static final fields with initial values are reloaded
1029 // from constant pool. The object identity hash is in the object header and is
1030 // not affected.
1031 class ResetMirrorField: public FieldClosure {
1032 private:
1033 Handle _m;
1034
1035 public:
1036 ResetMirrorField(Handle mirror) : _m(mirror) {}
1037
1038 void do_field(fieldDescriptor* fd) {
1039 assert(DumpSharedSpaces, "dump time only");
1040 assert(_m.not_null(), "Mirror cannot be NULL");
1041
1042 if (fd->is_static() && fd->has_initial_value()) {
1043 initialize_static_field(fd, _m, Thread::current());
1044 return;
1045 }
1046
1047 BasicType ft = fd->field_type();
1048 switch (ft) {
1049 case T_BYTE:
1050 _m()->byte_field_put(fd->offset(), 0);
1051 break;
1052 case T_CHAR:
1053 _m()->char_field_put(fd->offset(), 0);
1054 break;
1055 case T_DOUBLE:
1056 _m()->double_field_put(fd->offset(), 0);
1057 break;
1058 case T_FLOAT:
1059 _m()->float_field_put(fd->offset(), 0);
1060 break;
1061 case T_INT:
1062 _m()->int_field_put(fd->offset(), 0);
1063 break;
1064 case T_LONG:
1065 _m()->long_field_put(fd->offset(), 0);
1066 break;
1067 case T_SHORT:
1068 _m()->short_field_put(fd->offset(), 0);
1069 break;
1070 case T_BOOLEAN:
1071 _m()->bool_field_put(fd->offset(), false);
1072 break;
1073 case T_ARRAY:
1074 case T_OBJECT: {
1075 // It might be useful to cache the String field, but
1076 // for now just clear out any reference field
1077 oop o = _m()->obj_field(fd->offset());
1078 _m()->obj_field_put(fd->offset(), NULL);
1079 break;
1080 }
1081 default:
1082 ShouldNotReachHere();
1083 break;
1084 }
1085 }
1086 };
1087
1088 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1089 assert(HeapShared::is_heap_object_archiving_allowed(),
1090 "HeapShared::is_heap_object_archiving_allowed() must be true");
1091
1092 for (int t = 0; t <= T_VOID; t++) {
1093 oop m = Universe::_mirrors[t];
1094 if (m != NULL) {
1095 // Update the field at _array_klass_offset to point to the relocated array klass.
1096 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1097 assert(archived_m != NULL, "sanity");
1098 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1099 assert(ak != NULL || t == T_VOID, "should not be NULL");
1100 if (ak != NULL) {
1101 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1102 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1103 }
1104
1105 // Clear the fields. Just to be safe
1106 Klass *k = m->klass();
1107 Handle archived_mirror_h(THREAD, archived_m);
1108 ResetMirrorField reset(archived_mirror_h);
1109 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1110
1111 log_trace(cds, heap, mirror)(
1112 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1113 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1114
1115 Universe::_mirrors[t] = archived_m;
1116 }
1117 }
1118
1119 assert(Universe::_mirrors[T_INT] != NULL &&
1120 Universe::_mirrors[T_FLOAT] != NULL &&
1121 Universe::_mirrors[T_DOUBLE] != NULL &&
1122 Universe::_mirrors[T_BYTE] != NULL &&
1123 Universe::_mirrors[T_BOOLEAN] != NULL &&
1124 Universe::_mirrors[T_CHAR] != NULL &&
1125 Universe::_mirrors[T_LONG] != NULL &&
1126 Universe::_mirrors[T_SHORT] != NULL &&
1127 Universe::_mirrors[T_VOID] != NULL, "sanity");
1128
1129 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1130 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1131 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1132 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1133 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1134 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1135 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1136 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1137 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1138 }
1139
1140 //
1141 // After the mirror object is successfully archived, the archived
1142 // klass is set with _has_archived_raw_mirror flag.
1143 //
1144 // The _has_archived_raw_mirror flag is cleared at runtime when the
1145 // archived mirror is restored. If archived java heap data cannot
1146 // be used at runtime, new mirror object is created for the shared
1147 // class. The _has_archived_raw_mirror is cleared also during the process.
1148 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1149 assert(HeapShared::is_heap_object_archiving_allowed(),
1150 "HeapShared::is_heap_object_archiving_allowed() must be true");
1151
1152 // Mirror is already archived
1153 if (k->has_raw_archived_mirror()) {
1154 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1155 return k->archived_java_mirror_raw();
1156 }
1157
1158 // No mirror
1159 oop mirror = k->java_mirror();
1160 if (mirror == NULL) {
1161 return NULL;
1162 }
1163
1164 if (k->is_instance_klass()) {
1165 InstanceKlass *ik = InstanceKlass::cast(k);
1166 assert(ik->signers() == NULL, "class with signer should have been excluded");
1167
1168 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1169 ik->is_shared_app_class())) {
1170 // Archiving mirror for classes from non-builtin loaders is not
1171 // supported. Clear the _java_mirror within the archived class.
1172 k->set_java_mirror_handle(NULL);
1173 return NULL;
1174 }
1175 }
1176
1177 // Now start archiving the mirror object
1178 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1179 if (archived_mirror == NULL) {
1180 return NULL;
1181 }
1182
1183 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1184 if (archived_mirror == NULL) {
1185 return NULL;
1186 }
1187
1188 k->set_archived_java_mirror_raw(archived_mirror);
1189
1190 k->set_has_raw_archived_mirror();
1191
1192 ResourceMark rm;
1193 log_trace(cds, heap, mirror)(
1194 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1195 k->external_name(), p2i(mirror), p2i(archived_mirror));
1196
1197 return archived_mirror;
1198 }
1199
1200 // The process is based on create_mirror().
1201 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1202 oop archived_mirror,
1203 Thread *THREAD) {
1204 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1205 // to archived metadata and objects below.
1206 Klass *c = archived_mirror->klass();
1207 Handle archived_mirror_h(THREAD, archived_mirror);
1208 ResetMirrorField reset(archived_mirror_h);
1209 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1210
1211 if (k->is_array_klass()) {
1212 oop archived_comp_mirror;
1213 if (k->is_typeArray_klass()) {
1214 // The primitive type mirrors are already archived. Get the archived mirror.
1215 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1216 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1217 assert(archived_comp_mirror != NULL, "Must be");
1218 } else {
1219 assert(k->is_objArray_klass(), "Must be");
1220 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1221 assert(element_klass != NULL, "Must have an element klass");
1222 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1223 if (archived_comp_mirror == NULL) {
1224 return NULL;
1225 }
1226 }
1227 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1228 } else {
1229 assert(k->is_instance_klass(), "Must be");
1230
1231 // Reset local static fields in the mirror
1232 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1233
1234 java_lang_Class:set_init_lock(archived_mirror, NULL);
1235
1236 set_protection_domain(archived_mirror, NULL);
1237 }
1238
1239 // clear class loader and mirror_module_field
1240 set_class_loader(archived_mirror, NULL);
1241 set_module(archived_mirror, NULL);
1242
1243 // The archived mirror's field at _klass_offset is still pointing to the original
1244 // klass. Updated the field in the archived mirror to point to the relocated
1245 // klass in the archive.
1246 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1247 log_debug(cds, heap, mirror)(
1248 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1249 p2i(as_Klass(mirror)), p2i(reloc_k));
1250 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1251
1252 // The field at _array_klass_offset is pointing to the original one dimension
1253 // higher array klass if exists. Relocate the pointer.
1254 Klass *arr = array_klass_acquire(mirror);
1255 if (arr != NULL) {
1256 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1257 log_debug(cds, heap, mirror)(
1258 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1259 p2i(arr), p2i(reloc_arr));
1260 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1261 }
1262 return archived_mirror;
1263 }
1264
1265 // Returns true if the mirror is updated, false if no archived mirror
1266 // data is present. After the archived mirror object is restored, the
1267 // shared klass' _has_raw_archived_mirror flag is cleared.
1268 bool java_lang_Class::restore_archived_mirror(Klass *k,
1269 Handle class_loader, Handle module,
1270 Handle protection_domain, TRAPS) {
1271 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1272 // see more details in SystemDictionary::resolve_well_known_classes().
1273 if (!SystemDictionary::Class_klass_loaded()) {
1274 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1275 fixup_mirror_list()->push(k);
1276 return true;
1277 }
1278
1279 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1280
1281 if (m == NULL) {
1282 return false;
1283 }
1284
1285 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1286
1287 // mirror is archived, restore
1288 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1289 Handle mirror(THREAD, m);
1290
1291 if (!k->is_array_klass()) {
1292 // - local static final fields with initial values were initialized at dump time
1293
1294 // create the init_lock
1295 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1296 set_init_lock(mirror(), r);
1297
1298 if (protection_domain.not_null()) {
1299 set_protection_domain(mirror(), protection_domain());
1300 }
1301 }
1302
1303 assert(class_loader() == k->class_loader(), "should be same");
1304 if (class_loader.not_null()) {
1305 set_class_loader(mirror(), class_loader());
1306 }
1307
1308 k->set_java_mirror(mirror);
1309 k->clear_has_raw_archived_mirror();
1310
1311 set_mirror_module_field(k, mirror, module, THREAD);
1312
1313 ResourceMark rm;
1314 log_trace(cds, heap, mirror)(
1315 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1316
1317 return true;
1318 }
1319 #endif // INCLUDE_CDS_JAVA_HEAP
1320
1321 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1322 assert(_module_offset != 0, "must have been computed already");
1323 java_lang_Class::set_module(k->java_mirror(), module());
1324 }
1325
1326 int java_lang_Class::oop_size(oop java_class) {
1327 assert(_oop_size_offset != 0, "must be set");
1328 int size = java_class->int_field(_oop_size_offset);
1329 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1330 return size;
1331 }
1332
1333
1334 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1335 assert(_oop_size_offset != 0, "must be set");
1336 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1337 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1338 }
1339
1340 int java_lang_Class::static_oop_field_count(oop java_class) {
1341 assert(_static_oop_field_count_offset != 0, "must be set");
1342 return java_class->int_field(_static_oop_field_count_offset);
1343 }
1344
1345 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1346 assert(_static_oop_field_count_offset != 0, "must be set");
1347 return java_class->int_field_raw(_static_oop_field_count_offset);
1348 }
1349
1350 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1351 assert(_static_oop_field_count_offset != 0, "must be set");
1352 java_class->int_field_put(_static_oop_field_count_offset, size);
1353 }
1354
1355 oop java_lang_Class::protection_domain(oop java_class) {
1356 assert(_protection_domain_offset != 0, "must be set");
1357 return java_class->obj_field(_protection_domain_offset);
1358 }
1359 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1360 assert(_protection_domain_offset != 0, "must be set");
1361 java_class->obj_field_put(_protection_domain_offset, pd);
1362 }
1363
1364 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1365 assert(_component_mirror_offset != 0, "must be set");
1366 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1367 }
1368 oop java_lang_Class::component_mirror(oop java_class) {
1369 assert(_component_mirror_offset != 0, "must be set");
1370 return java_class->obj_field(_component_mirror_offset);
1371 }
1372
1373 oop java_lang_Class::init_lock(oop java_class) {
1374 assert(_init_lock_offset != 0, "must be set");
1375 return java_class->obj_field(_init_lock_offset);
1376 }
1377 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1378 assert(_init_lock_offset != 0, "must be set");
1379 java_class->obj_field_put(_init_lock_offset, init_lock);
1380 }
1381
1382 objArrayOop java_lang_Class::signers(oop java_class) {
1383 assert(_signers_offset != 0, "must be set");
1384 return (objArrayOop)java_class->obj_field(_signers_offset);
1385 }
1386 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1387 assert(_signers_offset != 0, "must be set");
1388 java_class->obj_field_put(_signers_offset, (oop)signers);
1389 }
1390
1391
1392 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1393 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1394 if (_class_loader_offset != 0) {
1395 java_class->obj_field_put(_class_loader_offset, loader);
1396 }
1397 }
1398
1399 oop java_lang_Class::class_loader(oop java_class) {
1400 assert(_class_loader_offset != 0, "must be set");
1401 return java_class->obj_field(_class_loader_offset);
1402 }
1403
1404 oop java_lang_Class::module(oop java_class) {
1405 assert(_module_offset != 0, "must be set");
1406 return java_class->obj_field(_module_offset);
1407 }
1408
1409 void java_lang_Class::set_module(oop java_class, oop module) {
1410 assert(_module_offset != 0, "must be set");
1411 java_class->obj_field_put(_module_offset, module);
1412 }
1413
1414 oop java_lang_Class::name(Handle java_class, TRAPS) {
1415 assert(_name_offset != 0, "must be set");
1416 oop o = java_class->obj_field(_name_offset);
1417 if (o == NULL) {
1418 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1419 java_class->obj_field_put(_name_offset, o);
1420 }
1421 return o;
1422 }
1423
1424 oop java_lang_Class::source_file(oop java_class) {
1425 assert(_source_file_offset != 0, "must be set");
1426 return java_class->obj_field(_source_file_offset);
1427 }
1428
1429 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1430 assert(_source_file_offset != 0, "must be set");
1431 java_class->obj_field_put(_source_file_offset, source_file);
1432 }
1433
1434 oop java_lang_Class::value_mirror(oop java_class) {
1435 assert(_value_mirror_offset != 0, "must be set");
1436 return java_class->obj_field(_value_mirror_offset);
1437 }
1438
1439 void java_lang_Class::set_value_mirror(oop java_class, oop mirror) {
1440 assert(_value_mirror_offset != 0, "must be set");
1441 java_class->obj_field_put(_value_mirror_offset, mirror);
1442 }
1443
1444 oop java_lang_Class::box_mirror(oop java_class) {
1445 assert(_box_mirror_offset != 0, "must be set");
1446 return java_class->obj_field(_box_mirror_offset);
1447 }
1448
1449 void java_lang_Class::set_box_mirror(oop java_class, oop mirror) {
1450 assert(_box_mirror_offset != 0, "must be set");
1451 java_class->obj_field_put(_box_mirror_offset, mirror);
1452 }
1453
1454 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1455 // This should be improved by adding a field at the Java level or by
1456 // introducing a new VM klass (see comment in ClassFileParser)
1457 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1458 if (type != T_VOID) {
1459 Klass* aklass = Universe::typeArrayKlassObj(type);
1460 assert(aklass != NULL, "correct bootstrap");
1461 release_set_array_klass(java_class, aklass);
1462 }
1463 #ifdef ASSERT
1464 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1465 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1466 #endif
1467 return java_class;
1468 }
1469
1470
1471 Klass* java_lang_Class::as_Klass(oop java_class) {
1472 //%note memory_2
1473 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1474 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1475 assert(k == NULL || k->is_klass(), "type check");
1476 return k;
1477 }
1478
1479 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1480 //%note memory_2
1481 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1482 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1483 assert(k == NULL || k->is_klass(), "type check");
1484 return k;
1485 }
1486
1487
1488 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1489 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1490 java_class->metadata_field_put(_klass_offset, klass);
1491 }
1492
1493
1494 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1495 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1496 Symbol* name = NULL;
1497 bool is_instance = false;
1498 bool is_value = false;
1499 if (is_primitive(java_class)) {
1500 name = vmSymbols::type_signature(primitive_type(java_class));
1501 } else {
1502 Klass* k = as_Klass(java_class);
1503 is_instance = k->is_instance_klass();
1504 is_value = k->is_value();
1505 name = k->name();
1506 }
1507 if (name == NULL) {
1508 st->print("<null>");
1509 return;
1510 }
1511 if (is_instance) {
1512 if (is_value && (java_class == value_mirror(java_class))) {
1513 st->print("Q");
1514 } else {
1515 st->print("L");
1516 }
1517 }
1518 st->write((char*) name->base(), (int) name->utf8_length());
1519 if (is_instance) st->print(";");
1520 }
1521
1522 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1523 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1524 Symbol* name;
1525 if (is_primitive(java_class)) {
1526 name = vmSymbols::type_signature(primitive_type(java_class));
1527 // Because this can create a new symbol, the caller has to decrement
1528 // the refcount, so make adjustment here and below for symbols returned
1529 // that are not created or incremented due to a successful lookup.
1530 name->increment_refcount();
1531 } else {
1532 Klass* k = as_Klass(java_class);
1533 if (!k->is_instance_klass()) {
1534 name = k->name();
1535 name->increment_refcount();
1536 } else {
1537 ResourceMark rm;
1538 const char* sigstr;
1539 if (k->is_value()) {
1540 char c = (java_class == value_mirror(java_class)) ? 'Q' : 'L';
1541 sigstr = InstanceKlass::cast(k)->signature_name_of(c);
1542 } else {
1543 sigstr = k->signature_name();
1544 }
1545 int siglen = (int) strlen(sigstr);
1546 if (!intern_if_not_found) {
1547 name = SymbolTable::probe(sigstr, siglen);
1548 } else {
1549 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1550 }
1551 }
1552 }
1553 return name;
1554 }
1555
1556 // Returns the Java name for this Java mirror (Resource allocated)
1557 // See Klass::external_name().
1558 // For primitive type Java mirrors, its type name is returned.
1559 const char* java_lang_Class::as_external_name(oop java_class) {
1560 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1561 const char* name = NULL;
1562 if (is_primitive(java_class)) {
1563 name = type2name(primitive_type(java_class));
1564 } else {
1565 name = as_Klass(java_class)->external_name();
1566 }
1567 if (name == NULL) {
1568 name = "<null>";
1569 }
1570 return name;
1571 }
1572
1573 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1574 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1575 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1576 return k;
1577 }
1578
1579
1580 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1581 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1582 java_class->release_metadata_field_put(_array_klass_offset, klass);
1583 }
1584
1585
1586 BasicType java_lang_Class::primitive_type(oop java_class) {
1587 assert(java_lang_Class::is_primitive(java_class), "just checking");
1588 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1589 BasicType type = T_VOID;
1590 if (ak != NULL) {
1591 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1592 type = ArrayKlass::cast(ak)->element_type();
1593 } else {
1594 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1595 }
1596 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1597 return type;
1598 }
1599
1600 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1601 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1602 if (is_primitive(java_class)) {
1603 if (reference_klass != NULL)
1604 (*reference_klass) = NULL;
1605 return primitive_type(java_class);
1606 } else {
1607 if (reference_klass != NULL)
1608 (*reference_klass) = as_Klass(java_class);
1609 return T_OBJECT;
1610 }
1611 }
1612
1613
1614 oop java_lang_Class::primitive_mirror(BasicType t) {
1615 oop mirror = Universe::java_mirror(t);
1616 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1617 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1618 return mirror;
1619 }
1620
1621 bool java_lang_Class::offsets_computed = false;
1622 int java_lang_Class::classRedefinedCount_offset = -1;
1623
1624 #define CLASS_FIELDS_DO(macro) \
1625 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1626 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1627 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1628 macro(_module_offset, k, "module", module_signature, false); \
1629 macro(_name_offset, k, "name", string_signature, false); \
1630 macro(_box_mirror_offset, k, "boxType", class_signature, false); \
1631 macro(_value_mirror_offset, k, "valueType", class_signature, false); \
1632
1633 void java_lang_Class::compute_offsets() {
1634 if (offsets_computed) {
1635 return;
1636 }
1637
1638 offsets_computed = true;
1639
1640 InstanceKlass* k = SystemDictionary::Class_klass();
1641 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1642
1643 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1644 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1645 // GC treats them the same.
1646 _init_lock_offset = _component_mirror_offset;
1647
1648 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1649 }
1650
1651 #if INCLUDE_CDS
1652 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1653 f->do_u4((u4*)&offsets_computed);
1654 f->do_u4((u4*)&_init_lock_offset);
1655
1656 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1657
1658 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1659 }
1660 #endif
1661
1662 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1663 if (classRedefinedCount_offset == -1) {
1664 // If we don't have an offset for it then just return -1 as a marker.
1665 return -1;
1666 }
1667
1668 return the_class_mirror->int_field(classRedefinedCount_offset);
1669 }
1670
1671 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1672 if (classRedefinedCount_offset == -1) {
1673 // If we don't have an offset for it then nothing to set.
1674 return;
1675 }
1676
1677 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1678 }
1679
1680
1681 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1682 // platform thread structure, and a eetop offset which was used for thread
1683 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1684 // merged, so in the HotSpot VM we just use the eetop field for the thread
1685 // instead of the privateInfo_offset.
1686 //
1687 // Note: The stackSize field is only present starting in 1.4.
1688
1689 int java_lang_Thread::_name_offset = 0;
1690 int java_lang_Thread::_group_offset = 0;
1691 int java_lang_Thread::_contextClassLoader_offset = 0;
1692 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1693 int java_lang_Thread::_priority_offset = 0;
1694 int java_lang_Thread::_eetop_offset = 0;
1695 int java_lang_Thread::_daemon_offset = 0;
1696 int java_lang_Thread::_stillborn_offset = 0;
1697 int java_lang_Thread::_stackSize_offset = 0;
1698 int java_lang_Thread::_tid_offset = 0;
1699 int java_lang_Thread::_thread_status_offset = 0;
1700 int java_lang_Thread::_park_blocker_offset = 0;
1701 int java_lang_Thread::_park_event_offset = 0 ;
1702
1703 #define THREAD_FIELDS_DO(macro) \
1704 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1705 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1706 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1707 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1708 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1709 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1710 macro(_eetop_offset, k, "eetop", long_signature, false); \
1711 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1712 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1713 macro(_tid_offset, k, "tid", long_signature, false); \
1714 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1715 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1716 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false)
1717
1718 void java_lang_Thread::compute_offsets() {
1719 assert(_group_offset == 0, "offsets should be initialized only once");
1720
1721 InstanceKlass* k = SystemDictionary::Thread_klass();
1722 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1723 }
1724
1725 #if INCLUDE_CDS
1726 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1727 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1728 }
1729 #endif
1730
1731 JavaThread* java_lang_Thread::thread(oop java_thread) {
1732 return (JavaThread*)java_thread->address_field(_eetop_offset);
1733 }
1734
1735
1736 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1737 java_thread->address_field_put(_eetop_offset, (address)thread);
1738 }
1739
1740
1741 oop java_lang_Thread::name(oop java_thread) {
1742 return java_thread->obj_field(_name_offset);
1743 }
1744
1745
1746 void java_lang_Thread::set_name(oop java_thread, oop name) {
1747 java_thread->obj_field_put(_name_offset, name);
1748 }
1749
1750
1751 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1752 return (ThreadPriority)java_thread->int_field(_priority_offset);
1753 }
1754
1755
1756 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1757 java_thread->int_field_put(_priority_offset, priority);
1758 }
1759
1760
1761 oop java_lang_Thread::threadGroup(oop java_thread) {
1762 return java_thread->obj_field(_group_offset);
1763 }
1764
1765
1766 bool java_lang_Thread::is_stillborn(oop java_thread) {
1767 return java_thread->bool_field(_stillborn_offset) != 0;
1768 }
1769
1770
1771 // We never have reason to turn the stillborn bit off
1772 void java_lang_Thread::set_stillborn(oop java_thread) {
1773 java_thread->bool_field_put(_stillborn_offset, true);
1774 }
1775
1776
1777 bool java_lang_Thread::is_alive(oop java_thread) {
1778 JavaThread* thr = java_lang_Thread::thread(java_thread);
1779 return (thr != NULL);
1780 }
1781
1782
1783 bool java_lang_Thread::is_daemon(oop java_thread) {
1784 return java_thread->bool_field(_daemon_offset) != 0;
1785 }
1786
1787
1788 void java_lang_Thread::set_daemon(oop java_thread) {
1789 java_thread->bool_field_put(_daemon_offset, true);
1790 }
1791
1792 oop java_lang_Thread::context_class_loader(oop java_thread) {
1793 return java_thread->obj_field(_contextClassLoader_offset);
1794 }
1795
1796 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1797 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1798 }
1799
1800
1801 jlong java_lang_Thread::stackSize(oop java_thread) {
1802 if (_stackSize_offset > 0) {
1803 return java_thread->long_field(_stackSize_offset);
1804 } else {
1805 return 0;
1806 }
1807 }
1808
1809 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1810 void java_lang_Thread::set_thread_status(oop java_thread,
1811 java_lang_Thread::ThreadStatus status) {
1812 // The threadStatus is only present starting in 1.5
1813 if (_thread_status_offset > 0) {
1814 java_thread->int_field_put(_thread_status_offset, status);
1815 }
1816 }
1817
1818 // Read thread status value from threadStatus field in java.lang.Thread java class.
1819 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1820 // Make sure the caller is operating on behalf of the VM or is
1821 // running VM code (state == _thread_in_vm).
1822 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1823 JavaThread::current()->thread_state() == _thread_in_vm,
1824 "Java Thread is not running in vm");
1825 // The threadStatus is only present starting in 1.5
1826 if (_thread_status_offset > 0) {
1827 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1828 } else {
1829 // All we can easily figure out is if it is alive, but that is
1830 // enough info for a valid unknown status.
1831 // These aren't restricted to valid set ThreadStatus values, so
1832 // use JVMTI values and cast.
1833 JavaThread* thr = java_lang_Thread::thread(java_thread);
1834 if (thr == NULL) {
1835 // the thread hasn't run yet or is in the process of exiting
1836 return NEW;
1837 }
1838 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1839 }
1840 }
1841
1842
1843 jlong java_lang_Thread::thread_id(oop java_thread) {
1844 // The thread ID field is only present starting in 1.5
1845 if (_tid_offset > 0) {
1846 return java_thread->long_field(_tid_offset);
1847 } else {
1848 return 0;
1849 }
1850 }
1851
1852 oop java_lang_Thread::park_blocker(oop java_thread) {
1853 assert(JDK_Version::current().supports_thread_park_blocker() &&
1854 _park_blocker_offset != 0, "Must support parkBlocker field");
1855
1856 if (_park_blocker_offset > 0) {
1857 return java_thread->obj_field(_park_blocker_offset);
1858 }
1859
1860 return NULL;
1861 }
1862
1863 jlong java_lang_Thread::park_event(oop java_thread) {
1864 if (_park_event_offset > 0) {
1865 return java_thread->long_field(_park_event_offset);
1866 }
1867 return 0;
1868 }
1869
1870 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1871 if (_park_event_offset > 0) {
1872 java_thread->long_field_put(_park_event_offset, ptr);
1873 return true;
1874 }
1875 return false;
1876 }
1877
1878
1879 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1880 assert(_thread_status_offset != 0, "Must have thread status");
1881 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1882 switch (status) {
1883 case NEW : return "NEW";
1884 case RUNNABLE : return "RUNNABLE";
1885 case SLEEPING : return "TIMED_WAITING (sleeping)";
1886 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1887 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1888 case PARKED : return "WAITING (parking)";
1889 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1890 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1891 case TERMINATED : return "TERMINATED";
1892 default : return "UNKNOWN";
1893 };
1894 }
1895 int java_lang_ThreadGroup::_parent_offset = 0;
1896 int java_lang_ThreadGroup::_name_offset = 0;
1897 int java_lang_ThreadGroup::_threads_offset = 0;
1898 int java_lang_ThreadGroup::_groups_offset = 0;
1899 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1900 int java_lang_ThreadGroup::_destroyed_offset = 0;
1901 int java_lang_ThreadGroup::_daemon_offset = 0;
1902 int java_lang_ThreadGroup::_nthreads_offset = 0;
1903 int java_lang_ThreadGroup::_ngroups_offset = 0;
1904
1905 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1906 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1907 return java_thread_group->obj_field(_parent_offset);
1908 }
1909
1910 // ("name as oop" accessor is not necessary)
1911
1912 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1913 oop name = java_thread_group->obj_field(_name_offset);
1914 // ThreadGroup.name can be null
1915 if (name != NULL) {
1916 return java_lang_String::as_utf8_string(name);
1917 }
1918 return NULL;
1919 }
1920
1921 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1922 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1923 return java_thread_group->int_field(_nthreads_offset);
1924 }
1925
1926 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1927 oop threads = java_thread_group->obj_field(_threads_offset);
1928 assert(threads != NULL, "threadgroups should have threads");
1929 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1930 return objArrayOop(threads);
1931 }
1932
1933 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1934 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1935 return java_thread_group->int_field(_ngroups_offset);
1936 }
1937
1938 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1939 oop groups = java_thread_group->obj_field(_groups_offset);
1940 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1941 return objArrayOop(groups);
1942 }
1943
1944 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1945 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1946 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1947 }
1948
1949 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1950 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1951 return java_thread_group->bool_field(_destroyed_offset) != 0;
1952 }
1953
1954 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1955 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1956 return java_thread_group->bool_field(_daemon_offset) != 0;
1957 }
1958
1959 #define THREADGROUP_FIELDS_DO(macro) \
1960 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1961 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1962 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1963 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1964 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1965 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1966 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1967 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1968 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1969
1970 void java_lang_ThreadGroup::compute_offsets() {
1971 assert(_parent_offset == 0, "offsets should be initialized only once");
1972
1973 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1974 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1975 }
1976
1977 #if INCLUDE_CDS
1978 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1979 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1980 }
1981 #endif
1982
1983 #define THROWABLE_FIELDS_DO(macro) \
1984 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1985 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1986 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1987 macro(depth_offset, k, "depth", int_signature, false); \
1988 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1989
1990 void java_lang_Throwable::compute_offsets() {
1991 InstanceKlass* k = SystemDictionary::Throwable_klass();
1992 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1993 }
1994
1995 #if INCLUDE_CDS
1996 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1997 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1998 }
1999 #endif
2000
2001 oop java_lang_Throwable::unassigned_stacktrace() {
2002 InstanceKlass* ik = SystemDictionary::Throwable_klass();
2003 oop base = ik->static_field_base_raw();
2004 return base->obj_field(static_unassigned_stacktrace_offset);
2005 }
2006
2007 oop java_lang_Throwable::backtrace(oop throwable) {
2008 return throwable->obj_field_acquire(backtrace_offset);
2009 }
2010
2011
2012 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2013 throwable->release_obj_field_put(backtrace_offset, value);
2014 }
2015
2016 int java_lang_Throwable::depth(oop throwable) {
2017 return throwable->int_field(depth_offset);
2018 }
2019
2020 void java_lang_Throwable::set_depth(oop throwable, int value) {
2021 throwable->int_field_put(depth_offset, value);
2022 }
2023
2024 oop java_lang_Throwable::message(oop throwable) {
2025 return throwable->obj_field(detailMessage_offset);
2026 }
2027
2028
2029 // Return Symbol for detailed_message or NULL
2030 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2031 PRESERVE_EXCEPTION_MARK; // Keep original exception
2032 oop detailed_message = java_lang_Throwable::message(throwable);
2033 if (detailed_message != NULL) {
2034 return java_lang_String::as_symbol(detailed_message, THREAD);
2035 }
2036 return NULL;
2037 }
2038
2039 void java_lang_Throwable::set_message(oop throwable, oop value) {
2040 throwable->obj_field_put(detailMessage_offset, value);
2041 }
2042
2043
2044 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2045 throwable->obj_field_put(stackTrace_offset, st_element_array);
2046 }
2047
2048 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2049 set_stacktrace(throwable, NULL);
2050 }
2051
2052
2053 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2054 ResourceMark rm;
2055 Klass* k = throwable->klass();
2056 assert(k != NULL, "just checking");
2057 st->print("%s", k->external_name());
2058 oop msg = message(throwable);
2059 if (msg != NULL) {
2060 st->print(": %s", java_lang_String::as_utf8_string(msg));
2061 }
2062 }
2063
2064 // After this many redefines, the stack trace is unreliable.
2065 const int MAX_VERSION = USHRT_MAX;
2066
2067 static inline bool version_matches(Method* method, int version) {
2068 assert(version < MAX_VERSION, "version is too big");
2069 return method != NULL && (method->constants()->version() == version);
2070 }
2071
2072
2073 // This class provides a simple wrapper over the internal structure of
2074 // exception backtrace to insulate users of the backtrace from needing
2075 // to know what it looks like.
2076 class BacktraceBuilder: public StackObj {
2077 friend class BacktraceIterator;
2078 private:
2079 Handle _backtrace;
2080 objArrayOop _head;
2081 typeArrayOop _methods;
2082 typeArrayOop _bcis;
2083 objArrayOop _mirrors;
2084 typeArrayOop _names; // needed to insulate method name against redefinition
2085 int _index;
2086 NoSafepointVerifier _nsv;
2087
2088 enum {
2089 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2090 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2091 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2092 trace_names_offset = java_lang_Throwable::trace_names_offset,
2093 trace_next_offset = java_lang_Throwable::trace_next_offset,
2094 trace_size = java_lang_Throwable::trace_size,
2095 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2096 };
2097
2098 // get info out of chunks
2099 static typeArrayOop get_methods(objArrayHandle chunk) {
2100 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2101 assert(methods != NULL, "method array should be initialized in backtrace");
2102 return methods;
2103 }
2104 static typeArrayOop get_bcis(objArrayHandle chunk) {
2105 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2106 assert(bcis != NULL, "bci array should be initialized in backtrace");
2107 return bcis;
2108 }
2109 static objArrayOop get_mirrors(objArrayHandle chunk) {
2110 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2111 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2112 return mirrors;
2113 }
2114 static typeArrayOop get_names(objArrayHandle chunk) {
2115 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2116 assert(names != NULL, "names array should be initialized in backtrace");
2117 return names;
2118 }
2119
2120 public:
2121
2122 // constructor for new backtrace
2123 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2124 expand(CHECK);
2125 _backtrace = Handle(THREAD, _head);
2126 _index = 0;
2127 }
2128
2129 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2130 _methods = get_methods(backtrace);
2131 _bcis = get_bcis(backtrace);
2132 _mirrors = get_mirrors(backtrace);
2133 _names = get_names(backtrace);
2134 assert(_methods->length() == _bcis->length() &&
2135 _methods->length() == _mirrors->length() &&
2136 _mirrors->length() == _names->length(),
2137 "method and source information arrays should match");
2138
2139 // head is the preallocated backtrace
2140 _head = backtrace();
2141 _backtrace = Handle(thread, _head);
2142 _index = 0;
2143 }
2144
2145 void expand(TRAPS) {
2146 objArrayHandle old_head(THREAD, _head);
2147 PauseNoSafepointVerifier pnsv(&_nsv);
2148
2149 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2150 objArrayHandle new_head(THREAD, head);
2151
2152 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2153 typeArrayHandle new_methods(THREAD, methods);
2154
2155 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2156 typeArrayHandle new_bcis(THREAD, bcis);
2157
2158 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2159 objArrayHandle new_mirrors(THREAD, mirrors);
2160
2161 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2162 typeArrayHandle new_names(THREAD, names);
2163
2164 if (!old_head.is_null()) {
2165 old_head->obj_at_put(trace_next_offset, new_head());
2166 }
2167 new_head->obj_at_put(trace_methods_offset, new_methods());
2168 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2169 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2170 new_head->obj_at_put(trace_names_offset, new_names());
2171
2172 _head = new_head();
2173 _methods = new_methods();
2174 _bcis = new_bcis();
2175 _mirrors = new_mirrors();
2176 _names = new_names();
2177 _index = 0;
2178 }
2179
2180 oop backtrace() {
2181 return _backtrace();
2182 }
2183
2184 inline void push(Method* method, int bci, TRAPS) {
2185 // Smear the -1 bci to 0 since the array only holds unsigned
2186 // shorts. The later line number lookup would just smear the -1
2187 // to a 0 even if it could be recorded.
2188 if (bci == SynchronizationEntryBCI) bci = 0;
2189
2190 if (_index >= trace_chunk_size) {
2191 methodHandle mhandle(THREAD, method);
2192 expand(CHECK);
2193 method = mhandle();
2194 }
2195
2196 _methods->ushort_at_put(_index, method->orig_method_idnum());
2197 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2198
2199 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2200 // klass owning the symbols alive so their refcounts aren't decremented.
2201 Symbol* name = method->name();
2202 _names->symbol_at_put(_index, name);
2203
2204 // We need to save the mirrors in the backtrace to keep the class
2205 // from being unloaded while we still have this stack trace.
2206 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2207 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2208 _index++;
2209 }
2210
2211 };
2212
2213 struct BacktraceElement : public StackObj {
2214 int _method_id;
2215 int _bci;
2216 int _version;
2217 Symbol* _name;
2218 Handle _mirror;
2219 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2220 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2221 };
2222
2223 class BacktraceIterator : public StackObj {
2224 int _index;
2225 objArrayHandle _result;
2226 objArrayHandle _mirrors;
2227 typeArrayHandle _methods;
2228 typeArrayHandle _bcis;
2229 typeArrayHandle _names;
2230
2231 void init(objArrayHandle result, Thread* thread) {
2232 // Get method id, bci, version and mirror from chunk
2233 _result = result;
2234 if (_result.not_null()) {
2235 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2236 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2237 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2238 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2239 _index = 0;
2240 }
2241 }
2242 public:
2243 BacktraceIterator(objArrayHandle result, Thread* thread) {
2244 init(result, thread);
2245 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2246 }
2247
2248 BacktraceElement next(Thread* thread) {
2249 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2250 _methods->ushort_at(_index),
2251 Backtrace::version_at(_bcis->int_at(_index)),
2252 Backtrace::bci_at(_bcis->int_at(_index)),
2253 _names->symbol_at(_index));
2254 _index++;
2255
2256 if (_index >= java_lang_Throwable::trace_chunk_size) {
2257 int next_offset = java_lang_Throwable::trace_next_offset;
2258 // Get next chunk
2259 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2260 init(result, thread);
2261 }
2262 return e;
2263 }
2264
2265 bool repeat() {
2266 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2267 }
2268 };
2269
2270
2271 // Print stack trace element to resource allocated buffer
2272 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2273 int version, int bci, Symbol* name) {
2274 ResourceMark rm;
2275
2276 // Get strings and string lengths
2277 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2278 const char* klass_name = holder->external_name();
2279 int buf_len = (int)strlen(klass_name);
2280
2281 char* method_name = name->as_C_string();
2282 buf_len += (int)strlen(method_name);
2283
2284 char* source_file_name = NULL;
2285 Symbol* source = Backtrace::get_source_file_name(holder, version);
2286 if (source != NULL) {
2287 source_file_name = source->as_C_string();
2288 buf_len += (int)strlen(source_file_name);
2289 }
2290
2291 char *module_name = NULL, *module_version = NULL;
2292 ModuleEntry* module = holder->module();
2293 if (module->is_named()) {
2294 module_name = module->name()->as_C_string();
2295 buf_len += (int)strlen(module_name);
2296 if (module->version() != NULL) {
2297 module_version = module->version()->as_C_string();
2298 buf_len += (int)strlen(module_version);
2299 }
2300 }
2301
2302 // Allocate temporary buffer with extra space for formatting and line number
2303 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2304
2305 // Print stack trace line in buffer
2306 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2307
2308 // Print module information
2309 if (module_name != NULL) {
2310 if (module_version != NULL) {
2311 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2312 } else {
2313 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2314 }
2315 }
2316
2317 // The method can be NULL if the requested class version is gone
2318 Method* method = holder->method_with_orig_idnum(method_id, version);
2319 if (!version_matches(method, version)) {
2320 strcat(buf, "Redefined)");
2321 } else {
2322 int line_number = Backtrace::get_line_number(method, bci);
2323 if (line_number == -2) {
2324 strcat(buf, "Native Method)");
2325 } else {
2326 if (source_file_name != NULL && (line_number != -1)) {
2327 // Sourcename and linenumber
2328 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2329 } else if (source_file_name != NULL) {
2330 // Just sourcename
2331 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2332 } else {
2333 // Neither sourcename nor linenumber
2334 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2335 }
2336 CompiledMethod* nm = method->code();
2337 if (WizardMode && nm != NULL) {
2338 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2339 }
2340 }
2341 }
2342
2343 st->print_cr("%s", buf);
2344 }
2345
2346 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2347 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2348 int method_id = method->orig_method_idnum();
2349 int version = method->constants()->version();
2350 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2351 }
2352
2353 /**
2354 * Print the throwable message and its stack trace plus all causes by walking the
2355 * cause chain. The output looks the same as of Throwable.printStackTrace().
2356 */
2357 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2358 // First, print the message.
2359 print(throwable(), st);
2360 st->cr();
2361
2362 // Now print the stack trace.
2363 Thread* THREAD = Thread::current();
2364 while (throwable.not_null()) {
2365 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2366 if (result.is_null()) {
2367 st->print_raw_cr("\t<<no stack trace available>>");
2368 return;
2369 }
2370 BacktraceIterator iter(result, THREAD);
2371
2372 while (iter.repeat()) {
2373 BacktraceElement bte = iter.next(THREAD);
2374 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2375 }
2376 {
2377 // Call getCause() which doesn't necessarily return the _cause field.
2378 EXCEPTION_MARK;
2379 JavaValue cause(T_OBJECT);
2380 JavaCalls::call_virtual(&cause,
2381 throwable,
2382 throwable->klass(),
2383 vmSymbols::getCause_name(),
2384 vmSymbols::void_throwable_signature(),
2385 THREAD);
2386 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2387 if (HAS_PENDING_EXCEPTION) {
2388 CLEAR_PENDING_EXCEPTION;
2389 throwable = Handle();
2390 } else {
2391 throwable = Handle(THREAD, (oop) cause.get_jobject());
2392 if (throwable.not_null()) {
2393 st->print("Caused by: ");
2394 print(throwable(), st);
2395 st->cr();
2396 }
2397 }
2398 }
2399 }
2400 }
2401
2402 /**
2403 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2404 */
2405 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2406 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2407 JavaValue result(T_VOID);
2408 JavaCalls::call_virtual(&result,
2409 throwable,
2410 SystemDictionary::Throwable_klass(),
2411 vmSymbols::printStackTrace_name(),
2412 vmSymbols::void_method_signature(),
2413 THREAD);
2414 }
2415
2416 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2417 if (!StackTraceInThrowable) return;
2418 ResourceMark rm(THREAD);
2419
2420 // Start out by clearing the backtrace for this object, in case the VM
2421 // runs out of memory while allocating the stack trace
2422 set_backtrace(throwable(), NULL);
2423 // Clear lazily constructed Java level stacktrace if refilling occurs
2424 // This is unnecessary in 1.7+ but harmless
2425 clear_stacktrace(throwable());
2426
2427 int max_depth = MaxJavaStackTraceDepth;
2428 JavaThread* thread = (JavaThread*)THREAD;
2429
2430 BacktraceBuilder bt(CHECK);
2431
2432 // If there is no Java frame just return the method that was being called
2433 // with bci 0
2434 if (!thread->has_last_Java_frame()) {
2435 if (max_depth >= 1 && method() != NULL) {
2436 bt.push(method(), 0, CHECK);
2437 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2438 set_depth(throwable(), 1);
2439 set_backtrace(throwable(), bt.backtrace());
2440 }
2441 return;
2442 }
2443
2444 // Instead of using vframe directly, this version of fill_in_stack_trace
2445 // basically handles everything by hand. This significantly improved the
2446 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2447 // See bug 6333838 for more details.
2448 // The "ASSERT" here is to verify this method generates the exactly same stack
2449 // trace as utilizing vframe.
2450 #ifdef ASSERT
2451 vframeStream st(thread);
2452 methodHandle st_method(THREAD, st.method());
2453 #endif
2454 int total_count = 0;
2455 RegisterMap map(thread, false);
2456 int decode_offset = 0;
2457 CompiledMethod* nm = NULL;
2458 bool skip_fillInStackTrace_check = false;
2459 bool skip_throwableInit_check = false;
2460 bool skip_hidden = !ShowHiddenFrames;
2461
2462 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2463 Method* method = NULL;
2464 int bci = 0;
2465
2466 // Compiled java method case.
2467 if (decode_offset != 0) {
2468 DebugInfoReadStream stream(nm, decode_offset);
2469 decode_offset = stream.read_int();
2470 method = (Method*)nm->metadata_at(stream.read_int());
2471 bci = stream.read_bci();
2472 } else {
2473 if (fr.is_first_frame()) break;
2474 address pc = fr.pc();
2475 if (fr.is_interpreted_frame()) {
2476 address bcp = fr.interpreter_frame_bcp();
2477 method = fr.interpreter_frame_method();
2478 bci = method->bci_from(bcp);
2479 fr = fr.sender(&map);
2480 } else {
2481 CodeBlob* cb = fr.cb();
2482 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2483 // but non nmethod
2484 fr = fr.sender(&map);
2485 if (cb == NULL || !cb->is_compiled()) {
2486 continue;
2487 }
2488 nm = cb->as_compiled_method();
2489 if (nm->method()->is_native()) {
2490 method = nm->method();
2491 bci = 0;
2492 } else {
2493 PcDesc* pd = nm->pc_desc_at(pc);
2494 decode_offset = pd->scope_decode_offset();
2495 // if decode_offset is not equal to 0, it will execute the
2496 // "compiled java method case" at the beginning of the loop.
2497 continue;
2498 }
2499 }
2500 }
2501 #ifdef ASSERT
2502 assert(st_method() == method && st.bci() == bci,
2503 "Wrong stack trace");
2504 st.next();
2505 // vframeStream::method isn't GC-safe so store off a copy
2506 // of the Method* in case we GC.
2507 if (!st.at_end()) {
2508 st_method = st.method();
2509 }
2510 #endif
2511
2512 // the format of the stacktrace will be:
2513 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2514 // - 0 or more <init> methods for the exception class (skipped)
2515 // - rest of the stack
2516
2517 if (!skip_fillInStackTrace_check) {
2518 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2519 throwable->is_a(method->method_holder())) {
2520 continue;
2521 }
2522 else {
2523 skip_fillInStackTrace_check = true; // gone past them all
2524 }
2525 }
2526 if (!skip_throwableInit_check) {
2527 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2528
2529 // skip <init> methods of the exception class and superclasses
2530 // This is simlar to classic VM.
2531 if (method->name() == vmSymbols::object_initializer_name() &&
2532 throwable->is_a(method->method_holder())) {
2533 continue;
2534 } else {
2535 // there are none or we've seen them all - either way stop checking
2536 skip_throwableInit_check = true;
2537 }
2538 }
2539 if (method->is_hidden()) {
2540 if (skip_hidden) continue;
2541 }
2542 bt.push(method, bci, CHECK);
2543 total_count++;
2544 }
2545
2546 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2547
2548 // Put completed stack trace into throwable object
2549 set_backtrace(throwable(), bt.backtrace());
2550 set_depth(throwable(), total_count);
2551 }
2552
2553 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2554 // No-op if stack trace is disabled
2555 if (!StackTraceInThrowable) {
2556 return;
2557 }
2558
2559 // Disable stack traces for some preallocated out of memory errors
2560 if (!Universe::should_fill_in_stack_trace(throwable)) {
2561 return;
2562 }
2563
2564 PRESERVE_EXCEPTION_MARK;
2565
2566 JavaThread* thread = JavaThread::active();
2567 fill_in_stack_trace(throwable, method, thread);
2568 // ignore exceptions thrown during stack trace filling
2569 CLEAR_PENDING_EXCEPTION;
2570 }
2571
2572 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2573 // Allocate stack trace - backtrace is created but not filled in
2574
2575 // No-op if stack trace is disabled
2576 if (!StackTraceInThrowable) return;
2577 BacktraceBuilder bt(CHECK); // creates a backtrace
2578 set_backtrace(throwable(), bt.backtrace());
2579 }
2580
2581
2582 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2583 // Fill in stack trace into preallocated backtrace (no GC)
2584
2585 // No-op if stack trace is disabled
2586 if (!StackTraceInThrowable) return;
2587
2588 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2589
2590 JavaThread* THREAD = JavaThread::current();
2591
2592 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2593 assert(backtrace.not_null(), "backtrace should have been preallocated");
2594
2595 ResourceMark rm(THREAD);
2596 vframeStream st(THREAD);
2597
2598 BacktraceBuilder bt(THREAD, backtrace);
2599
2600 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2601 // methods as preallocated errors aren't created by "java" code.
2602
2603 // fill in as much stack trace as possible
2604 int chunk_count = 0;
2605 for (;!st.at_end(); st.next()) {
2606 bt.push(st.method(), st.bci(), CHECK);
2607 chunk_count++;
2608
2609 // Bail-out for deep stacks
2610 if (chunk_count >= trace_chunk_size) break;
2611 }
2612 set_depth(throwable(), chunk_count);
2613 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2614
2615 // We support the Throwable immutability protocol defined for Java 7.
2616 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2617 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2618 }
2619
2620 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2621 objArrayHandle stack_trace_array_h, TRAPS) {
2622
2623 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2624 THROW(vmSymbols::java_lang_NullPointerException());
2625 }
2626
2627 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2628
2629 if (stack_trace_array_h->length() != depth(throwable())) {
2630 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2631 }
2632
2633 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2634 BacktraceIterator iter(result, THREAD);
2635
2636 int index = 0;
2637 while (iter.repeat()) {
2638 BacktraceElement bte = iter.next(THREAD);
2639
2640 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2641
2642 if (stack_trace_element.is_null()) {
2643 THROW(vmSymbols::java_lang_NullPointerException());
2644 }
2645
2646 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2647 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2648
2649 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2650 method,
2651 bte._version,
2652 bte._bci,
2653 bte._name, CHECK);
2654 }
2655 }
2656
2657 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2658 // Allocate java.lang.StackTraceElement instance
2659 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2660 assert(k != NULL, "must be loaded in 1.4+");
2661 if (k->should_be_initialized()) {
2662 k->initialize(CHECK_0);
2663 }
2664
2665 Handle element = k->allocate_instance_handle(CHECK_0);
2666
2667 int version = method->constants()->version();
2668 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2669 return element();
2670 }
2671
2672 void java_lang_StackTraceElement::fill_in(Handle element,
2673 InstanceKlass* holder, const methodHandle& method,
2674 int version, int bci, Symbol* name, TRAPS) {
2675 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2676
2677 ResourceMark rm(THREAD);
2678 HandleMark hm(THREAD);
2679
2680 // Fill in class name
2681 Handle java_class(THREAD, holder->java_mirror());
2682 oop classname = java_lang_Class::name(java_class, CHECK);
2683 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2684 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2685
2686 oop loader = holder->class_loader();
2687 if (loader != NULL) {
2688 oop loader_name = java_lang_ClassLoader::name(loader);
2689 if (loader_name != NULL)
2690 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2691 }
2692
2693 // Fill in method name
2694 oop methodname = StringTable::intern(name, CHECK);
2695 java_lang_StackTraceElement::set_methodName(element(), methodname);
2696
2697 // Fill in module name and version
2698 ModuleEntry* module = holder->module();
2699 if (module->is_named()) {
2700 oop module_name = StringTable::intern(module->name(), CHECK);
2701 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2702 oop module_version;
2703 if (module->version() != NULL) {
2704 module_version = StringTable::intern(module->version(), CHECK);
2705 } else {
2706 module_version = NULL;
2707 }
2708 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2709 }
2710
2711 if (method() == NULL || !version_matches(method(), version)) {
2712 // The method was redefined, accurate line number information isn't available
2713 java_lang_StackTraceElement::set_fileName(element(), NULL);
2714 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2715 } else {
2716 // Fill in source file name and line number.
2717 Symbol* source = Backtrace::get_source_file_name(holder, version);
2718 oop source_file = java_lang_Class::source_file(java_class());
2719 if (source != NULL) {
2720 // Class was not redefined. We can trust its cache if set,
2721 // else we have to initialize it.
2722 if (source_file == NULL) {
2723 source_file = StringTable::intern(source, CHECK);
2724 java_lang_Class::set_source_file(java_class(), source_file);
2725 }
2726 } else {
2727 // Class was redefined. Dump the cache if it was set.
2728 if (source_file != NULL) {
2729 source_file = NULL;
2730 java_lang_Class::set_source_file(java_class(), source_file);
2731 }
2732 if (ShowHiddenFrames) {
2733 source = vmSymbols::unknown_class_name();
2734 source_file = StringTable::intern(source, CHECK);
2735 }
2736 }
2737 java_lang_StackTraceElement::set_fileName(element(), source_file);
2738
2739 int line_number = Backtrace::get_line_number(method, bci);
2740 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2741 }
2742 }
2743
2744 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2745 HandleMark hm(THREAD);
2746 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2747 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2748 // we should expand MemberName::name when Throwable uses StackTrace
2749 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2750 return method;
2751 }
2752
2753 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2754 // set Method* or mid/cpref
2755 HandleMark hm(THREAD);
2756 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2757 InstanceKlass* ik = method->method_holder();
2758 CallInfo info(method(), ik, CHECK);
2759 MethodHandles::init_method_MemberName(mname, info);
2760 // set bci
2761 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2762 // method may be redefined; store the version
2763 int version = method->constants()->version();
2764 assert((jushort)version == version, "version should be short");
2765 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2766 }
2767
2768 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2769 ResourceMark rm(THREAD);
2770 HandleMark hm(THREAD);
2771 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2772 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2773 InstanceKlass* holder = InstanceKlass::cast(clazz);
2774 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2775
2776 short version = stackFrame->short_field(_version_offset);
2777 short bci = stackFrame->short_field(_bci_offset);
2778 Symbol* name = method->name();
2779 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2780 }
2781
2782 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2783 macro(_memberName_offset, k, "memberName", object_signature, false); \
2784 macro(_bci_offset, k, "bci", short_signature, false)
2785
2786 void java_lang_StackFrameInfo::compute_offsets() {
2787 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2788 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2789 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2790 }
2791
2792 #if INCLUDE_CDS
2793 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2794 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2795 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2796 }
2797 #endif
2798
2799 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2800 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2801 macro(_locals_offset, k, "locals", object_array_signature, false); \
2802 macro(_operands_offset, k, "operands", object_array_signature, false); \
2803 macro(_mode_offset, k, "mode", int_signature, false)
2804
2805 void java_lang_LiveStackFrameInfo::compute_offsets() {
2806 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2807 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2808 }
2809
2810 #if INCLUDE_CDS
2811 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2812 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2813 }
2814 #endif
2815
2816 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2817 macro(override_offset, k, "override", bool_signature, false)
2818
2819 void java_lang_reflect_AccessibleObject::compute_offsets() {
2820 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2821 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2822 }
2823
2824 #if INCLUDE_CDS
2825 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2826 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2827 }
2828 #endif
2829
2830 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2831 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2832 return (jboolean) reflect->bool_field(override_offset);
2833 }
2834
2835 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2836 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2837 reflect->bool_field_put(override_offset, (int) value);
2838 }
2839
2840 #define METHOD_FIELDS_DO(macro) \
2841 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2842 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2843 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2844 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2845 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2846 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2847 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2848 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2849 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2850 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2851 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2852
2853 void java_lang_reflect_Method::compute_offsets() {
2854 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2855 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2856 }
2857
2858 #if INCLUDE_CDS
2859 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2860 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2861 }
2862 #endif
2863
2864 Handle java_lang_reflect_Method::create(TRAPS) {
2865 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2866 Klass* klass = SystemDictionary::reflect_Method_klass();
2867 // This class is eagerly initialized during VM initialization, since we keep a refence
2868 // to one of the methods
2869 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2870 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2871 }
2872
2873 oop java_lang_reflect_Method::clazz(oop reflect) {
2874 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2875 return reflect->obj_field(clazz_offset);
2876 }
2877
2878 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2879 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2880 reflect->obj_field_put(clazz_offset, value);
2881 }
2882
2883 int java_lang_reflect_Method::slot(oop reflect) {
2884 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2885 return reflect->int_field(slot_offset);
2886 }
2887
2888 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2889 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2890 reflect->int_field_put(slot_offset, value);
2891 }
2892
2893 void java_lang_reflect_Method::set_name(oop method, oop value) {
2894 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2895 method->obj_field_put(name_offset, value);
2896 }
2897
2898 oop java_lang_reflect_Method::return_type(oop method) {
2899 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2900 return method->obj_field(returnType_offset);
2901 }
2902
2903 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2904 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2905 method->obj_field_put(returnType_offset, value);
2906 }
2907
2908 oop java_lang_reflect_Method::parameter_types(oop method) {
2909 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2910 return method->obj_field(parameterTypes_offset);
2911 }
2912
2913 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2914 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2915 method->obj_field_put(parameterTypes_offset, value);
2916 }
2917
2918 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2919 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2920 method->obj_field_put(exceptionTypes_offset, value);
2921 }
2922
2923 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2924 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2925 method->int_field_put(modifiers_offset, value);
2926 }
2927
2928 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2929 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2930 method->obj_field_put(signature_offset, value);
2931 }
2932
2933 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2934 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2935 method->obj_field_put(annotations_offset, value);
2936 }
2937
2938 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2939 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2940 method->obj_field_put(parameter_annotations_offset, value);
2941 }
2942
2943 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2944 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2945 method->obj_field_put(annotation_default_offset, value);
2946 }
2947
2948 #define CONSTRUCTOR_FIELDS_DO(macro) \
2949 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2950 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2951 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2952 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2953 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2954 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2955 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2956 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2957
2958 void java_lang_reflect_Constructor::compute_offsets() {
2959 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2960 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2961 }
2962
2963 #if INCLUDE_CDS
2964 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2965 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2966 }
2967 #endif
2968
2969 Handle java_lang_reflect_Constructor::create(TRAPS) {
2970 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2971 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2972 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2973 InstanceKlass* ik = InstanceKlass::cast(k);
2974 // Ensure it is initialized
2975 ik->initialize(CHECK_NH);
2976 return ik->allocate_instance_handle(THREAD);
2977 }
2978
2979 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2980 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2981 return reflect->obj_field(clazz_offset);
2982 }
2983
2984 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2985 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2986 reflect->obj_field_put(clazz_offset, value);
2987 }
2988
2989 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2990 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2991 return constructor->obj_field(parameterTypes_offset);
2992 }
2993
2994 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2995 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2996 constructor->obj_field_put(parameterTypes_offset, value);
2997 }
2998
2999 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3000 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3001 constructor->obj_field_put(exceptionTypes_offset, value);
3002 }
3003
3004 int java_lang_reflect_Constructor::slot(oop reflect) {
3005 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3006 return reflect->int_field(slot_offset);
3007 }
3008
3009 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3010 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3011 reflect->int_field_put(slot_offset, value);
3012 }
3013
3014 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3015 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3016 constructor->int_field_put(modifiers_offset, value);
3017 }
3018
3019 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3020 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3021 constructor->obj_field_put(signature_offset, value);
3022 }
3023
3024 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3025 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3026 constructor->obj_field_put(annotations_offset, value);
3027 }
3028
3029 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3030 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3031 method->obj_field_put(parameter_annotations_offset, value);
3032 }
3033
3034 #define FIELD_FIELDS_DO(macro) \
3035 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3036 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3037 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
3038 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3039 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3040 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3041 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3042
3043 void java_lang_reflect_Field::compute_offsets() {
3044 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3045 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3046 }
3047
3048 #if INCLUDE_CDS
3049 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3050 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3051 }
3052 #endif
3053
3054 Handle java_lang_reflect_Field::create(TRAPS) {
3055 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3056 Symbol* name = vmSymbols::java_lang_reflect_Field();
3057 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3058 InstanceKlass* ik = InstanceKlass::cast(k);
3059 // Ensure it is initialized
3060 ik->initialize(CHECK_NH);
3061 return ik->allocate_instance_handle(THREAD);
3062 }
3063
3064 oop java_lang_reflect_Field::clazz(oop reflect) {
3065 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3066 return reflect->obj_field(clazz_offset);
3067 }
3068
3069 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3070 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3071 reflect->obj_field_put(clazz_offset, value);
3072 }
3073
3074 oop java_lang_reflect_Field::name(oop field) {
3075 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3076 return field->obj_field(name_offset);
3077 }
3078
3079 void java_lang_reflect_Field::set_name(oop field, oop value) {
3080 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3081 field->obj_field_put(name_offset, value);
3082 }
3083
3084 oop java_lang_reflect_Field::type(oop field) {
3085 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3086 return field->obj_field(type_offset);
3087 }
3088
3089 void java_lang_reflect_Field::set_type(oop field, oop value) {
3090 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3091 field->obj_field_put(type_offset, value);
3092 }
3093
3094 int java_lang_reflect_Field::slot(oop reflect) {
3095 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3096 return reflect->int_field(slot_offset);
3097 }
3098
3099 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3100 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3101 reflect->int_field_put(slot_offset, value);
3102 }
3103
3104 int java_lang_reflect_Field::modifiers(oop field) {
3105 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3106 return field->int_field(modifiers_offset);
3107 }
3108
3109 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3110 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3111 field->int_field_put(modifiers_offset, value);
3112 }
3113
3114 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3115 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3116 field->obj_field_put(signature_offset, value);
3117 }
3118
3119 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3120 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3121 field->obj_field_put(annotations_offset, value);
3122 }
3123
3124 #define CONSTANTPOOL_FIELDS_DO(macro) \
3125 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3126
3127 void reflect_ConstantPool::compute_offsets() {
3128 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3129 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3130 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3131 }
3132
3133 #if INCLUDE_CDS
3134 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3135 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3136 }
3137 #endif
3138
3139 #define PARAMETER_FIELDS_DO(macro) \
3140 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3141 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3142 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3143 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3144
3145 void java_lang_reflect_Parameter::compute_offsets() {
3146 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3147 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3148 }
3149
3150 #if INCLUDE_CDS
3151 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3152 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3153 }
3154 #endif
3155
3156 Handle java_lang_reflect_Parameter::create(TRAPS) {
3157 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3158 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3159 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3160 InstanceKlass* ik = InstanceKlass::cast(k);
3161 // Ensure it is initialized
3162 ik->initialize(CHECK_NH);
3163 return ik->allocate_instance_handle(THREAD);
3164 }
3165
3166 oop java_lang_reflect_Parameter::name(oop param) {
3167 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3168 return param->obj_field(name_offset);
3169 }
3170
3171 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3172 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3173 param->obj_field_put(name_offset, value);
3174 }
3175
3176 int java_lang_reflect_Parameter::modifiers(oop param) {
3177 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3178 return param->int_field(modifiers_offset);
3179 }
3180
3181 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3182 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3183 param->int_field_put(modifiers_offset, value);
3184 }
3185
3186 int java_lang_reflect_Parameter::index(oop param) {
3187 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3188 return param->int_field(index_offset);
3189 }
3190
3191 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3192 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3193 param->int_field_put(index_offset, value);
3194 }
3195
3196 oop java_lang_reflect_Parameter::executable(oop param) {
3197 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3198 return param->obj_field(executable_offset);
3199 }
3200
3201 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3202 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3203 param->obj_field_put(executable_offset, value);
3204 }
3205
3206
3207 int java_lang_Module::loader_offset;
3208 int java_lang_Module::name_offset;
3209 int java_lang_Module::_module_entry_offset = -1;
3210
3211 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3212 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3213 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3214 vmSymbols::java_lang_module_init_signature(),
3215 loader, module_name, CHECK_NH);
3216 }
3217
3218 #define MODULE_FIELDS_DO(macro) \
3219 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3220 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3221
3222 void java_lang_Module::compute_offsets() {
3223 InstanceKlass* k = SystemDictionary::Module_klass();
3224 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3225 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3226 }
3227
3228 #if INCLUDE_CDS
3229 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3230 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3231 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3232 }
3233 #endif
3234
3235 oop java_lang_Module::loader(oop module) {
3236 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3237 return module->obj_field(loader_offset);
3238 }
3239
3240 void java_lang_Module::set_loader(oop module, oop value) {
3241 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3242 module->obj_field_put(loader_offset, value);
3243 }
3244
3245 oop java_lang_Module::name(oop module) {
3246 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3247 return module->obj_field(name_offset);
3248 }
3249
3250 void java_lang_Module::set_name(oop module, oop value) {
3251 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3252 module->obj_field_put(name_offset, value);
3253 }
3254
3255 ModuleEntry* java_lang_Module::module_entry(oop module) {
3256 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3257 assert(module != NULL, "module can't be null");
3258 assert(oopDesc::is_oop(module), "module must be oop");
3259
3260 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3261 if (module_entry == NULL) {
3262 // If the inject field containing the ModuleEntry* is null then return the
3263 // class loader's unnamed module.
3264 oop loader = java_lang_Module::loader(module);
3265 Handle h_loader = Handle(Thread::current(), loader);
3266 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3267 return loader_cld->unnamed_module();
3268 }
3269 return module_entry;
3270 }
3271
3272 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3273 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3274 assert(module != NULL, "module can't be null");
3275 assert(oopDesc::is_oop(module), "module must be oop");
3276 module->address_field_put(_module_entry_offset, (address)module_entry);
3277 }
3278
3279 Handle reflect_ConstantPool::create(TRAPS) {
3280 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3281 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3282 // Ensure it is initialized
3283 k->initialize(CHECK_NH);
3284 return k->allocate_instance_handle(THREAD);
3285 }
3286
3287
3288 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3289 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3290 oop mirror = value->pool_holder()->java_mirror();
3291 // Save the mirror to get back the constant pool.
3292 reflect->obj_field_put(_oop_offset, mirror);
3293 }
3294
3295 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3296 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3297
3298 oop mirror = reflect->obj_field(_oop_offset);
3299 Klass* k = java_lang_Class::as_Klass(mirror);
3300 assert(k->is_instance_klass(), "Must be");
3301
3302 // Get the constant pool back from the klass. Since class redefinition
3303 // merges the new constant pool into the old, this is essentially the
3304 // same constant pool as the original. If constant pool merging is
3305 // no longer done in the future, this will have to change to save
3306 // the original.
3307 return InstanceKlass::cast(k)->constants();
3308 }
3309
3310 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3311 macro(_base_offset, k, "base", object_signature, false)
3312
3313 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3314 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3315 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3316 }
3317
3318 #if INCLUDE_CDS
3319 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3320 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3321 }
3322 #endif
3323
3324 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3325 Klass* k = SystemDictionary::box_klass(type);
3326 if (k == NULL) return NULL;
3327 InstanceKlass* ik = InstanceKlass::cast(k);
3328 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3329 return ik->allocate_instance(THREAD);
3330 }
3331
3332
3333 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3334 oop box = initialize_and_allocate(type, CHECK_0);
3335 if (box == NULL) return NULL;
3336 switch (type) {
3337 case T_BOOLEAN:
3338 box->bool_field_put(value_offset, value->z);
3339 break;
3340 case T_CHAR:
3341 box->char_field_put(value_offset, value->c);
3342 break;
3343 case T_FLOAT:
3344 box->float_field_put(value_offset, value->f);
3345 break;
3346 case T_DOUBLE:
3347 box->double_field_put(long_value_offset, value->d);
3348 break;
3349 case T_BYTE:
3350 box->byte_field_put(value_offset, value->b);
3351 break;
3352 case T_SHORT:
3353 box->short_field_put(value_offset, value->s);
3354 break;
3355 case T_INT:
3356 box->int_field_put(value_offset, value->i);
3357 break;
3358 case T_LONG:
3359 box->long_field_put(long_value_offset, value->j);
3360 break;
3361 default:
3362 return NULL;
3363 }
3364 return box;
3365 }
3366
3367
3368 BasicType java_lang_boxing_object::basic_type(oop box) {
3369 if (box == NULL) return T_ILLEGAL;
3370 BasicType type = SystemDictionary::box_klass_type(box->klass());
3371 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3372 return T_ILLEGAL;
3373 return type;
3374 }
3375
3376
3377 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3378 BasicType type = SystemDictionary::box_klass_type(box->klass());
3379 switch (type) {
3380 case T_BOOLEAN:
3381 value->z = box->bool_field(value_offset);
3382 break;
3383 case T_CHAR:
3384 value->c = box->char_field(value_offset);
3385 break;
3386 case T_FLOAT:
3387 value->f = box->float_field(value_offset);
3388 break;
3389 case T_DOUBLE:
3390 value->d = box->double_field(long_value_offset);
3391 break;
3392 case T_BYTE:
3393 value->b = box->byte_field(value_offset);
3394 break;
3395 case T_SHORT:
3396 value->s = box->short_field(value_offset);
3397 break;
3398 case T_INT:
3399 value->i = box->int_field(value_offset);
3400 break;
3401 case T_LONG:
3402 value->j = box->long_field(long_value_offset);
3403 break;
3404 default:
3405 return T_ILLEGAL;
3406 } // end switch
3407 return type;
3408 }
3409
3410
3411 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3412 BasicType type = SystemDictionary::box_klass_type(box->klass());
3413 switch (type) {
3414 case T_BOOLEAN:
3415 box->bool_field_put(value_offset, value->z);
3416 break;
3417 case T_CHAR:
3418 box->char_field_put(value_offset, value->c);
3419 break;
3420 case T_FLOAT:
3421 box->float_field_put(value_offset, value->f);
3422 break;
3423 case T_DOUBLE:
3424 box->double_field_put(long_value_offset, value->d);
3425 break;
3426 case T_BYTE:
3427 box->byte_field_put(value_offset, value->b);
3428 break;
3429 case T_SHORT:
3430 box->short_field_put(value_offset, value->s);
3431 break;
3432 case T_INT:
3433 box->int_field_put(value_offset, value->i);
3434 break;
3435 case T_LONG:
3436 box->long_field_put(long_value_offset, value->j);
3437 break;
3438 default:
3439 return T_ILLEGAL;
3440 } // end switch
3441 return type;
3442 }
3443
3444
3445 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3446 switch (type) {
3447 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3448 case T_CHAR: st->print("%d", value->c); break;
3449 case T_BYTE: st->print("%d", value->b); break;
3450 case T_SHORT: st->print("%d", value->s); break;
3451 case T_INT: st->print("%d", value->i); break;
3452 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3453 case T_FLOAT: st->print("%f", value->f); break;
3454 case T_DOUBLE: st->print("%lf", value->d); break;
3455 default: st->print("type %d?", type); break;
3456 }
3457 }
3458
3459 // Support for java_lang_ref_Reference
3460
3461 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3462 assert(obj != NULL, "sanity");
3463 if (offset != java_lang_ref_Reference::referent_offset) {
3464 return false;
3465 }
3466
3467 Klass* k = obj->klass();
3468 if (!k->is_instance_klass()) {
3469 return false;
3470 }
3471
3472 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3473 bool is_reference = ik->reference_type() != REF_NONE;
3474 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3475 return is_reference;
3476 }
3477
3478 // Support for java_lang_ref_SoftReference
3479 //
3480
3481 #define SOFTREFERENCE_FIELDS_DO(macro) \
3482 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3483 macro(static_clock_offset, k, "clock", long_signature, true)
3484
3485 void java_lang_ref_SoftReference::compute_offsets() {
3486 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3487 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3488 }
3489
3490 #if INCLUDE_CDS
3491 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3492 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3493 }
3494 #endif
3495
3496 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3497 return ref->long_field(timestamp_offset);
3498 }
3499
3500 jlong java_lang_ref_SoftReference::clock() {
3501 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3502 oop base = ik->static_field_base_raw();
3503 return base->long_field(static_clock_offset);
3504 }
3505
3506 void java_lang_ref_SoftReference::set_clock(jlong value) {
3507 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3508 oop base = ik->static_field_base_raw();
3509 base->long_field_put(static_clock_offset, value);
3510 }
3511
3512 // Support for java_lang_invoke_DirectMethodHandle
3513
3514 int java_lang_invoke_DirectMethodHandle::_member_offset;
3515
3516 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3517 oop member_name = NULL;
3518 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3519 "a DirectMethodHandle oop is expected");
3520 return dmh->obj_field(member_offset_in_bytes());
3521 }
3522
3523 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3524 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3525
3526 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3527 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3528 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3529 }
3530
3531 #if INCLUDE_CDS
3532 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3533 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3534 }
3535 #endif
3536
3537 // Support for java_lang_invoke_MethodHandle
3538
3539 int java_lang_invoke_MethodHandle::_type_offset;
3540 int java_lang_invoke_MethodHandle::_form_offset;
3541
3542 int java_lang_invoke_MemberName::_clazz_offset;
3543 int java_lang_invoke_MemberName::_name_offset;
3544 int java_lang_invoke_MemberName::_type_offset;
3545 int java_lang_invoke_MemberName::_flags_offset;
3546 int java_lang_invoke_MemberName::_method_offset;
3547 int java_lang_invoke_MemberName::_vmindex_offset;
3548
3549 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3550 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3551
3552 int java_lang_invoke_LambdaForm::_vmentry_offset;
3553
3554 #define METHODHANDLE_FIELDS_DO(macro) \
3555 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3556 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3557
3558 void java_lang_invoke_MethodHandle::compute_offsets() {
3559 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3560 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3561 }
3562
3563 #if INCLUDE_CDS
3564 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3565 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3566 }
3567 #endif
3568
3569 #define MEMBERNAME_FIELDS_DO(macro) \
3570 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3571 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3572 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3573 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3574 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3575
3576 void java_lang_invoke_MemberName::compute_offsets() {
3577 InstanceKlass* k = SystemDictionary::MemberName_klass();
3578 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3579 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3580 }
3581
3582 #if INCLUDE_CDS
3583 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3584 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3585 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3586 }
3587 #endif
3588
3589 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3590 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3591 assert(k != NULL, "jdk mismatch");
3592 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3593 }
3594
3595 #if INCLUDE_CDS
3596 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3597 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3598 }
3599 #endif
3600
3601 #define LAMBDAFORM_FIELDS_DO(macro) \
3602 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3603
3604 void java_lang_invoke_LambdaForm::compute_offsets() {
3605 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3606 assert (k != NULL, "jdk mismatch");
3607 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3608 }
3609
3610 #if INCLUDE_CDS
3611 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3612 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3613 }
3614 #endif
3615
3616 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3617 return obj != NULL && is_subclass(obj->klass());
3618 }
3619
3620
3621 oop java_lang_invoke_MethodHandle::type(oop mh) {
3622 return mh->obj_field(_type_offset);
3623 }
3624
3625 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3626 mh->obj_field_put(_type_offset, mtype);
3627 }
3628
3629 oop java_lang_invoke_MethodHandle::form(oop mh) {
3630 assert(_form_offset != 0, "");
3631 return mh->obj_field(_form_offset);
3632 }
3633
3634 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3635 assert(_form_offset != 0, "");
3636 mh->obj_field_put(_form_offset, lform);
3637 }
3638
3639 /// MemberName accessors
3640
3641 oop java_lang_invoke_MemberName::clazz(oop mname) {
3642 assert(is_instance(mname), "wrong type");
3643 return mname->obj_field(_clazz_offset);
3644 }
3645
3646 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3647 assert(is_instance(mname), "wrong type");
3648 mname->obj_field_put(_clazz_offset, clazz);
3649 }
3650
3651 oop java_lang_invoke_MemberName::name(oop mname) {
3652 assert(is_instance(mname), "wrong type");
3653 return mname->obj_field(_name_offset);
3654 }
3655
3656 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3657 assert(is_instance(mname), "wrong type");
3658 mname->obj_field_put(_name_offset, name);
3659 }
3660
3661 oop java_lang_invoke_MemberName::type(oop mname) {
3662 assert(is_instance(mname), "wrong type");
3663 return mname->obj_field(_type_offset);
3664 }
3665
3666 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3667 assert(is_instance(mname), "wrong type");
3668 mname->obj_field_put(_type_offset, type);
3669 }
3670
3671 int java_lang_invoke_MemberName::flags(oop mname) {
3672 assert(is_instance(mname), "wrong type");
3673 return mname->int_field(_flags_offset);
3674 }
3675
3676 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3677 assert(is_instance(mname), "wrong type");
3678 mname->int_field_put(_flags_offset, flags);
3679 }
3680
3681
3682 // Return vmtarget from ResolvedMethodName method field through indirection
3683 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3684 assert(is_instance(mname), "wrong type");
3685 oop method = mname->obj_field(_method_offset);
3686 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3687 }
3688
3689 bool java_lang_invoke_MemberName::is_method(oop mname) {
3690 assert(is_instance(mname), "must be MemberName");
3691 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3692 }
3693
3694 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3695 assert(is_instance(mname), "wrong type");
3696 mname->obj_field_put(_method_offset, resolved_method);
3697 }
3698
3699 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3700 assert(is_instance(mname), "wrong type");
3701 return (intptr_t) mname->address_field(_vmindex_offset);
3702 }
3703
3704 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3705 assert(is_instance(mname), "wrong type");
3706 mname->address_field_put(_vmindex_offset, (address) index);
3707 }
3708
3709
3710 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3711 assert(is_instance(resolved_method), "wrong type");
3712 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3713 assert(m->is_method(), "must be");
3714 return m;
3715 }
3716
3717 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3718 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3719 assert(is_instance(resolved_method), "wrong type");
3720 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3721 }
3722
3723 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3724 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3725 oop resolved_method = ResolvedMethodTable::find_method(m());
3726 if (resolved_method == NULL) {
3727 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3728 if (!k->is_initialized()) {
3729 k->initialize(CHECK_NULL);
3730 }
3731 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3732 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3733 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3734 // distinct loaders) to ensure the metadata is kept alive.
3735 // This mirror may be different than the one in clazz field.
3736 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3737 resolved_method = ResolvedMethodTable::add_method(m, Handle(THREAD, new_resolved_method));
3738 }
3739 return resolved_method;
3740 }
3741
3742 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3743 assert(is_instance(lform), "wrong type");
3744 return lform->obj_field(_vmentry_offset);
3745 }
3746
3747
3748 // Support for java_lang_invoke_MethodType
3749
3750 int java_lang_invoke_MethodType::_rtype_offset;
3751 int java_lang_invoke_MethodType::_ptypes_offset;
3752
3753 #define METHODTYPE_FIELDS_DO(macro) \
3754 macro(_rtype_offset, k, "rtype", class_signature, false); \
3755 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3756
3757 void java_lang_invoke_MethodType::compute_offsets() {
3758 InstanceKlass* k = SystemDictionary::MethodType_klass();
3759 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3760 }
3761
3762 #if INCLUDE_CDS
3763 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3764 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3765 }
3766 #endif
3767
3768 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3769 st->print("(");
3770 objArrayOop pts = ptypes(mt);
3771 for (int i = 0, limit = pts->length(); i < limit; i++) {
3772 java_lang_Class::print_signature(pts->obj_at(i), st);
3773 }
3774 st->print(")");
3775 java_lang_Class::print_signature(rtype(mt), st);
3776 }
3777
3778 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3779 ResourceMark rm;
3780 stringStream buffer(128);
3781 print_signature(mt, &buffer);
3782 const char* sigstr = buffer.base();
3783 int siglen = (int) buffer.size();
3784 Symbol *name;
3785 if (!intern_if_not_found) {
3786 name = SymbolTable::probe(sigstr, siglen);
3787 } else {
3788 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3789 }
3790 return name;
3791 }
3792
3793 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3794 if (oopDesc::equals(mt1, mt2))
3795 return true;
3796 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3797 return false;
3798 if (ptype_count(mt1) != ptype_count(mt2))
3799 return false;
3800 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3801 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3802 return false;
3803 }
3804 return true;
3805 }
3806
3807 oop java_lang_invoke_MethodType::rtype(oop mt) {
3808 assert(is_instance(mt), "must be a MethodType");
3809 return mt->obj_field(_rtype_offset);
3810 }
3811
3812 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3813 assert(is_instance(mt), "must be a MethodType");
3814 return (objArrayOop) mt->obj_field(_ptypes_offset);
3815 }
3816
3817 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3818 return ptypes(mt)->obj_at(idx);
3819 }
3820
3821 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3822 return ptypes(mt)->length();
3823 }
3824
3825 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3826 objArrayOop pts = ptypes(mt);
3827 int count = pts->length();
3828 int slots = 0;
3829 for (int i = 0; i < count; i++) {
3830 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3831 slots += type2size[bt];
3832 }
3833 return slots;
3834 }
3835
3836 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3837 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3838 return type2size[bt];
3839 }
3840
3841
3842 // Support for java_lang_invoke_CallSite
3843
3844 int java_lang_invoke_CallSite::_target_offset;
3845 int java_lang_invoke_CallSite::_context_offset;
3846
3847 #define CALLSITE_FIELDS_DO(macro) \
3848 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3849 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3850
3851 void java_lang_invoke_CallSite::compute_offsets() {
3852 InstanceKlass* k = SystemDictionary::CallSite_klass();
3853 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3854 }
3855
3856 #if INCLUDE_CDS
3857 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3858 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3859 }
3860 #endif
3861
3862 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3863 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3864
3865 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3866 return dep_oop;
3867 }
3868
3869 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3870
3871 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3872 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3873
3874 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3875 InstanceKlass* k = SystemDictionary::Context_klass();
3876 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3877 }
3878
3879 #if INCLUDE_CDS
3880 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3881 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3882 }
3883 #endif
3884
3885 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3886 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3887 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3888 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3889 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3890 return dep_ctx;
3891 }
3892
3893 // Support for java_security_AccessControlContext
3894
3895 int java_security_AccessControlContext::_context_offset = 0;
3896 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3897 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3898 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3899
3900 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3901 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3902 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3903 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3904 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3905
3906 void java_security_AccessControlContext::compute_offsets() {
3907 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3908 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3909 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3910 }
3911
3912 #if INCLUDE_CDS
3913 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3914 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3915 }
3916 #endif
3917
3918 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3919 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3920 // Ensure klass is initialized
3921 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3922 // Allocate result
3923 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3924 // Fill in values
3925 result->obj_field_put(_context_offset, context());
3926 result->obj_field_put(_privilegedContext_offset, privileged_context());
3927 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3928 // whitelist AccessControlContexts created by the JVM if present
3929 if (_isAuthorized_offset != -1) {
3930 result->bool_field_put(_isAuthorized_offset, true);
3931 }
3932 return result;
3933 }
3934
3935
3936 // Support for java_lang_ClassLoader
3937
3938 bool java_lang_ClassLoader::offsets_computed = false;
3939 int java_lang_ClassLoader::_loader_data_offset = -1;
3940 int java_lang_ClassLoader::parallelCapable_offset = -1;
3941 int java_lang_ClassLoader::name_offset = -1;
3942 int java_lang_ClassLoader::nameAndId_offset = -1;
3943 int java_lang_ClassLoader::unnamedModule_offset = -1;
3944
3945 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3946 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3947 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3948 }
3949
3950 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3951 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3952 return RawAccess<>::load_at(loader, _loader_data_offset);
3953 }
3954
3955 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3956 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3957 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3958 }
3959
3960 #define CLASSLOADER_FIELDS_DO(macro) \
3961 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3962 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3963 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3964 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3965 macro(parent_offset, k1, "parent", classloader_signature, false)
3966
3967 void java_lang_ClassLoader::compute_offsets() {
3968 assert(!offsets_computed, "offsets should be initialized only once");
3969 offsets_computed = true;
3970
3971 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3972 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3973
3974 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3975 }
3976
3977 #if INCLUDE_CDS
3978 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3979 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3980 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3981 }
3982 #endif
3983
3984 oop java_lang_ClassLoader::parent(oop loader) {
3985 assert(is_instance(loader), "loader must be oop");
3986 return loader->obj_field(parent_offset);
3987 }
3988
3989 // Returns the name field of this class loader. If the name field has not
3990 // been set, null will be returned.
3991 oop java_lang_ClassLoader::name(oop loader) {
3992 assert(is_instance(loader), "loader must be oop");
3993 return loader->obj_field(name_offset);
3994 }
3995
3996 // Returns the nameAndId field of this class loader. The format is
3997 // as follows:
3998 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
3999 // If the defining loader has no name then <qualified-class-name> @<id>
4000 // If built-in loader, then omit '@<id>' as there is only one instance.
4001 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4002 oop java_lang_ClassLoader::nameAndId(oop loader) {
4003 assert(is_instance(loader), "loader must be oop");
4004 return loader->obj_field(nameAndId_offset);
4005 }
4006
4007 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4008 assert(is_instance(loader), "loader must be oop");
4009 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
4010 oop acl = loader;
4011 debug_only(jint loop_count = 0);
4012 // This loop taken verbatim from ClassLoader.java:
4013 do {
4014 acl = parent(acl);
4015 if (oopDesc::equals(cl, acl)) {
4016 return true;
4017 }
4018 assert(++loop_count > 0, "loop_count overflow");
4019 } while (acl != NULL);
4020 return false;
4021 }
4022
4023 bool java_lang_ClassLoader::is_instance(oop obj) {
4024 return obj != NULL && is_subclass(obj->klass());
4025 }
4026
4027
4028 // For class loader classes, parallelCapable defined
4029 // based on non-null field
4030 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4031 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4032 if (parallelCapable_offset == -1) {
4033 // Default for backward compatibility is false
4034 return false;
4035 }
4036 return (class_loader->obj_field(parallelCapable_offset) != NULL);
4037 }
4038
4039 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4040 // Fix for 4474172; see evaluation for more details
4041 loader = non_reflection_class_loader(loader);
4042
4043 oop cl = SystemDictionary::java_system_loader();
4044 while(cl != NULL) {
4045 if (oopDesc::equals(cl, loader)) return true;
4046 cl = parent(cl);
4047 }
4048 return false;
4049 }
4050
4051 // Return true if this is one of the class loaders associated with
4052 // the generated bytecodes for reflection.
4053 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4054 if (loader != NULL) {
4055 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4056 // This might be null in non-1.4 JDKs
4057 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4058 }
4059 return false;
4060 }
4061
4062 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4063 // See whether this is one of the class loaders associated with
4064 // the generated bytecodes for reflection, and if so, "magically"
4065 // delegate to its parent to prevent class loading from occurring
4066 // in places where applications using reflection didn't expect it.
4067 if (is_reflection_class_loader(loader)) {
4068 return parent(loader);
4069 }
4070 return loader;
4071 }
4072
4073 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4074 assert(is_instance(loader), "loader must be oop");
4075 return loader->obj_field(unnamedModule_offset);
4076 }
4077
4078 // Support for java_lang_System
4079 //
4080 #define SYSTEM_FIELDS_DO(macro) \
4081 macro(static_in_offset, k, "in", input_stream_signature, true); \
4082 macro(static_out_offset, k, "out", print_stream_signature, true); \
4083 macro(static_err_offset, k, "err", print_stream_signature, true); \
4084 macro(static_security_offset, k, "security", security_manager_signature, true)
4085
4086 void java_lang_System::compute_offsets() {
4087 InstanceKlass* k = SystemDictionary::System_klass();
4088 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4089 }
4090
4091 #if INCLUDE_CDS
4092 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4093 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4094 }
4095 #endif
4096
4097 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4098 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4099 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4100
4101 // Support for jdk_internal_misc_UnsafeConstants
4102 //
4103 class UnsafeConstantsFixup : public FieldClosure {
4104 private:
4105 int _address_size;
4106 int _page_size;
4107 bool _big_endian;
4108 bool _use_unaligned_access;
4109 public:
4110 UnsafeConstantsFixup() {
4111 // round up values for all static final fields
4112 _address_size = sizeof(void*);
4113 _page_size = os::vm_page_size();
4114 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4115 _use_unaligned_access = UseUnalignedAccesses;
4116 }
4117
4118 void do_field(fieldDescriptor* fd) {
4119 oop mirror = fd->field_holder()->java_mirror();
4120 assert(mirror != NULL, "UnsafeConstants must have mirror already");
4121 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4122 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4123 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4124 if (fd->name() == vmSymbols::address_size_name()) {
4125 mirror->int_field_put(fd->offset(), _address_size);
4126 } else if (fd->name() == vmSymbols::page_size_name()) {
4127 mirror->int_field_put(fd->offset(), _page_size);
4128 } else if (fd->name() == vmSymbols::big_endian_name()) {
4129 mirror->bool_field_put(fd->offset(), _big_endian);
4130 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4131 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4132 } else {
4133 assert(false, "unexpected UnsafeConstants field");
4134 }
4135 }
4136 };
4137
4138 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4139 UnsafeConstantsFixup fixup;
4140 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4141 }
4142
4143 int java_lang_Class::_klass_offset;
4144 int java_lang_Class::_array_klass_offset;
4145 int java_lang_Class::_oop_size_offset;
4146 int java_lang_Class::_static_oop_field_count_offset;
4147 int java_lang_Class::_class_loader_offset;
4148 int java_lang_Class::_module_offset;
4149 int java_lang_Class::_protection_domain_offset;
4150 int java_lang_Class::_component_mirror_offset;
4151 int java_lang_Class::_box_mirror_offset;
4152 int java_lang_Class::_value_mirror_offset;
4153 int java_lang_Class::_init_lock_offset;
4154 int java_lang_Class::_signers_offset;
4155 int java_lang_Class::_name_offset;
4156 int java_lang_Class::_source_file_offset;
4157 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4158 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4159 int java_lang_Throwable::backtrace_offset;
4160 int java_lang_Throwable::detailMessage_offset;
4161 int java_lang_Throwable::stackTrace_offset;
4162 int java_lang_Throwable::depth_offset;
4163 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4164 int java_lang_reflect_AccessibleObject::override_offset;
4165 int java_lang_reflect_Method::clazz_offset;
4166 int java_lang_reflect_Method::name_offset;
4167 int java_lang_reflect_Method::returnType_offset;
4168 int java_lang_reflect_Method::parameterTypes_offset;
4169 int java_lang_reflect_Method::exceptionTypes_offset;
4170 int java_lang_reflect_Method::slot_offset;
4171 int java_lang_reflect_Method::modifiers_offset;
4172 int java_lang_reflect_Method::signature_offset;
4173 int java_lang_reflect_Method::annotations_offset;
4174 int java_lang_reflect_Method::parameter_annotations_offset;
4175 int java_lang_reflect_Method::annotation_default_offset;
4176 int java_lang_reflect_Constructor::clazz_offset;
4177 int java_lang_reflect_Constructor::parameterTypes_offset;
4178 int java_lang_reflect_Constructor::exceptionTypes_offset;
4179 int java_lang_reflect_Constructor::slot_offset;
4180 int java_lang_reflect_Constructor::modifiers_offset;
4181 int java_lang_reflect_Constructor::signature_offset;
4182 int java_lang_reflect_Constructor::annotations_offset;
4183 int java_lang_reflect_Constructor::parameter_annotations_offset;
4184 int java_lang_reflect_Field::clazz_offset;
4185 int java_lang_reflect_Field::name_offset;
4186 int java_lang_reflect_Field::type_offset;
4187 int java_lang_reflect_Field::slot_offset;
4188 int java_lang_reflect_Field::modifiers_offset;
4189 int java_lang_reflect_Field::signature_offset;
4190 int java_lang_reflect_Field::annotations_offset;
4191 int java_lang_reflect_Parameter::name_offset;
4192 int java_lang_reflect_Parameter::modifiers_offset;
4193 int java_lang_reflect_Parameter::index_offset;
4194 int java_lang_reflect_Parameter::executable_offset;
4195 int java_lang_boxing_object::value_offset;
4196 int java_lang_boxing_object::long_value_offset;
4197 int java_lang_ref_Reference::referent_offset;
4198 int java_lang_ref_Reference::queue_offset;
4199 int java_lang_ref_Reference::next_offset;
4200 int java_lang_ref_Reference::discovered_offset;
4201 int java_lang_ref_SoftReference::timestamp_offset;
4202 int java_lang_ref_SoftReference::static_clock_offset;
4203 int java_lang_ClassLoader::parent_offset;
4204 int java_lang_System::static_in_offset;
4205 int java_lang_System::static_out_offset;
4206 int java_lang_System::static_err_offset;
4207 int java_lang_System::static_security_offset;
4208 int java_lang_StackTraceElement::methodName_offset;
4209 int java_lang_StackTraceElement::fileName_offset;
4210 int java_lang_StackTraceElement::lineNumber_offset;
4211 int java_lang_StackTraceElement::moduleName_offset;
4212 int java_lang_StackTraceElement::moduleVersion_offset;
4213 int java_lang_StackTraceElement::classLoaderName_offset;
4214 int java_lang_StackTraceElement::declaringClass_offset;
4215 int java_lang_StackTraceElement::declaringClassObject_offset;
4216 int java_lang_StackFrameInfo::_memberName_offset;
4217 int java_lang_StackFrameInfo::_bci_offset;
4218 int java_lang_StackFrameInfo::_version_offset;
4219 int java_lang_LiveStackFrameInfo::_monitors_offset;
4220 int java_lang_LiveStackFrameInfo::_locals_offset;
4221 int java_lang_LiveStackFrameInfo::_operands_offset;
4222 int java_lang_LiveStackFrameInfo::_mode_offset;
4223 int java_lang_AssertionStatusDirectives::classes_offset;
4224 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4225 int java_lang_AssertionStatusDirectives::packages_offset;
4226 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4227 int java_lang_AssertionStatusDirectives::deflt_offset;
4228 int java_nio_Buffer::_limit_offset;
4229 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4230 int reflect_ConstantPool::_oop_offset;
4231 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4232
4233
4234 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4235 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4236 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4237 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4238 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4239 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4240 macro(methodName_offset, k, "methodName", string_signature, false); \
4241 macro(fileName_offset, k, "fileName", string_signature, false); \
4242 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4243
4244 // Support for java_lang_StackTraceElement
4245 void java_lang_StackTraceElement::compute_offsets() {
4246 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4247 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4248 }
4249
4250 #if INCLUDE_CDS
4251 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4252 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4253 }
4254 #endif
4255
4256 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4257 element->obj_field_put(fileName_offset, value);
4258 }
4259
4260 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4261 element->obj_field_put(declaringClass_offset, value);
4262 }
4263
4264 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4265 element->obj_field_put(methodName_offset, value);
4266 }
4267
4268 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4269 element->int_field_put(lineNumber_offset, value);
4270 }
4271
4272 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4273 element->obj_field_put(moduleName_offset, value);
4274 }
4275
4276 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4277 element->obj_field_put(moduleVersion_offset, value);
4278 }
4279
4280 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4281 element->obj_field_put(classLoaderName_offset, value);
4282 }
4283
4284 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4285 element->obj_field_put(declaringClassObject_offset, value);
4286 }
4287
4288 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4289 element->short_field_put(_version_offset, value);
4290 }
4291
4292 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4293 element->int_field_put(_bci_offset, value);
4294 }
4295
4296 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4297 element->obj_field_put(_monitors_offset, value);
4298 }
4299
4300 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4301 element->obj_field_put(_locals_offset, value);
4302 }
4303
4304 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4305 element->obj_field_put(_operands_offset, value);
4306 }
4307
4308 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4309 element->int_field_put(_mode_offset, value);
4310 }
4311
4312 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4313 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4314 macro(classes_offset, k, "classes", string_array_signature, false); \
4315 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4316 macro(packages_offset, k, "packages", string_array_signature, false); \
4317 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4318 macro(deflt_offset, k, "deflt", bool_signature, false)
4319
4320 void java_lang_AssertionStatusDirectives::compute_offsets() {
4321 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4322 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4323 }
4324
4325 #if INCLUDE_CDS
4326 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4327 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4328 }
4329 #endif
4330
4331 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4332 o->obj_field_put(classes_offset, val);
4333 }
4334
4335 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4336 o->obj_field_put(classEnabled_offset, val);
4337 }
4338
4339 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4340 o->obj_field_put(packages_offset, val);
4341 }
4342
4343 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4344 o->obj_field_put(packageEnabled_offset, val);
4345 }
4346
4347 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4348 o->bool_field_put(deflt_offset, val);
4349 }
4350
4351
4352 // Support for intrinsification of java.nio.Buffer.checkIndex
4353 int java_nio_Buffer::limit_offset() {
4354 return _limit_offset;
4355 }
4356
4357 #define BUFFER_FIELDS_DO(macro) \
4358 macro(_limit_offset, k, "limit", int_signature, false)
4359
4360 void java_nio_Buffer::compute_offsets() {
4361 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4362 assert(k != NULL, "must be loaded in 1.4+");
4363 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4364 }
4365
4366 #if INCLUDE_CDS
4367 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4368 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4369 }
4370 #endif
4371
4372 #define AOS_FIELDS_DO(macro) \
4373 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4374
4375 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4376 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4377 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4378 }
4379
4380 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4381 assert(_owner_offset != 0, "Must be initialized");
4382 return obj->obj_field(_owner_offset);
4383 }
4384
4385 #if INCLUDE_CDS
4386 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4387 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4388 }
4389 #endif
4390
4391 static int member_offset(int hardcoded_offset) {
4392 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4393 }
4394
4395 // Compute hard-coded offsets
4396 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4397 // are not available to determine the offset_of_static_fields.
4398 void JavaClasses::compute_hard_coded_offsets() {
4399
4400 // java_lang_boxing_object
4401 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4402 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4403
4404 // java_lang_ref_Reference
4405 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4406 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4407 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4408 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4409 }
4410
4411 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4412
4413 // Compute non-hard-coded field offsets of all the classes in this file
4414 void JavaClasses::compute_offsets() {
4415 if (UseSharedSpaces) {
4416 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4417 JvmtiExport::has_early_class_hook_env()),
4418 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4419 // None of the classes used by the rest of this function can be replaced by
4420 // JMVTI ClassFileLoadHook.
4421 // We are safe to use the archived offsets, which have already been restored
4422 // by JavaClasses::serialize_offsets, without computing the offsets again.
4423 return;
4424 }
4425
4426 // We have already called the compute_offsets() of the
4427 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4428 // earlier inside SystemDictionary::resolve_well_known_classes()
4429 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4430
4431 // generated interpreter code wants to know about the offsets we just computed:
4432 AbstractAssembler::update_delayed_values();
4433 }
4434
4435 #if INCLUDE_CDS
4436 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4437
4438 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4439 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4440 }
4441 #endif
4442
4443
4444 #ifndef PRODUCT
4445
4446 // These functions exist to assert the validity of hard-coded field offsets to guard
4447 // against changes in the class files
4448
4449 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4450 EXCEPTION_MARK;
4451 fieldDescriptor fd;
4452 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4453 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4454 InstanceKlass* ik = InstanceKlass::cast(k);
4455 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4456 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4457 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4458 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4459 return false;
4460 }
4461 if (fd.is_static()) {
4462 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4463 return false;
4464 }
4465 if (fd.offset() == hardcoded_offset ) {
4466 return true;
4467 } else {
4468 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4469 klass_name, field_name, hardcoded_offset, fd.offset());
4470 return false;
4471 }
4472 }
4473
4474 // Check the hard-coded field offsets of all the classes in this file
4475
4476 void JavaClasses::check_offsets() {
4477 bool valid = true;
4478
4479 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4480 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4481
4482 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4483 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4484
4485 // Boxed primitive objects (java_lang_boxing_object)
4486
4487 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4488 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4489 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4490 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4491 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4492 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4493 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4494 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4495
4496 // java.lang.ref.Reference
4497
4498 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4499 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4500 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4501 // Fake field
4502 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4503
4504 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4505 }
4506
4507 #endif // PRODUCT
4508
4509 int InjectedField::compute_offset() {
4510 InstanceKlass* ik = InstanceKlass::cast(klass());
4511 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4512 if (!may_be_java && !fs.access_flags().is_internal()) {
4513 // Only look at injected fields
4514 continue;
4515 }
4516 if (fs.name() == name() && fs.signature() == signature()) {
4517 return fs.offset();
4518 }
4519 }
4520 ResourceMark rm;
4521 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)" : "");
4522 #ifndef PRODUCT
4523 ik->print();
4524 tty->print_cr("all fields:");
4525 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4526 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4527 }
4528 #endif //PRODUCT
4529 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4530 return -1;
4531 }
4532
4533 void javaClasses_init() {
4534 JavaClasses::compute_offsets();
4535 JavaClasses::check_offsets();
4536 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4537 }