1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/classLoaderData.inline.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/vmSymbols.hpp"
33 #include "code/debugInfo.hpp"
34 #include "code/dependencyContext.hpp"
35 #include "code/pcDesc.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/heapShared.inline.hpp"
41 #include "memory/metaspaceShared.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/fieldStreams.hpp"
46 #include "oops/instanceKlass.hpp"
47 #include "oops/instanceMirrorKlass.hpp"
48 #include "oops/klass.hpp"
49 #include "oops/method.inline.hpp"
50 #include "oops/objArrayOop.inline.hpp"
51 #include "oops/oop.inline.hpp"
52 #include "oops/symbol.hpp"
53 #include "oops/typeArrayOop.inline.hpp"
54 #include "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_bool(&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) {
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::new_symbol(base, length);
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::new_symbol(base, length);
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_typeArray_klass()) {
927 BasicType type = TypeArrayKlass::cast(k)->element_type();
928 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
929 } else {
930 assert(k->is_objArray_klass(), "Must be");
931 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
932 assert(element_klass != NULL, "Must have an element klass");
933 comp_mirror = Handle(THREAD, element_klass->java_mirror());
934 }
935 assert(comp_mirror() != NULL, "must have a mirror");
936
937 // Two-way link between the array klass and its component mirror:
938 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
939 set_component_mirror(mirror(), comp_mirror());
940 // See below for ordering dependencies between field array_klass in component mirror
941 // and java_mirror in this klass.
942 } else {
943 assert(k->is_instance_klass(), "Must be");
944
945 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
946 if (HAS_PENDING_EXCEPTION) {
947 // If any of the fields throws an exception like OOM remove the klass field
948 // from the mirror so GC doesn't follow it after the klass has been deallocated.
949 // This mirror looks like a primitive type, which logically it is because it
950 // it represents no class.
951 java_lang_Class::set_klass(mirror(), NULL);
952 return;
953 }
954 }
955
956 // set the classLoader field in the java_lang_Class instance
957 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
958 set_class_loader(mirror(), class_loader());
959
960 // Setup indirection from klass->mirror
961 // after any exceptions can happen during allocations.
962 k->set_java_mirror(mirror);
963
964 // Set the module field in the java_lang_Class instance. This must be done
965 // after the mirror is set.
966 set_mirror_module_field(k, mirror, module, THREAD);
967
968 if (comp_mirror() != NULL) {
969 // Set after k->java_mirror() is published, because compiled code running
970 // concurrently doesn't expect a k to have a null java_mirror.
971 release_set_array_klass(comp_mirror(), k);
972 }
973 } else {
974 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
975 fixup_mirror_list()->push(k);
976 }
977 }
978
979 #if INCLUDE_CDS_JAVA_HEAP
980 // Clears mirror fields. Static final fields with initial values are reloaded
981 // from constant pool. The object identity hash is in the object header and is
982 // not affected.
983 class ResetMirrorField: public FieldClosure {
984 private:
985 Handle _m;
986
987 public:
988 ResetMirrorField(Handle mirror) : _m(mirror) {}
989
990 void do_field(fieldDescriptor* fd) {
991 assert(DumpSharedSpaces, "dump time only");
992 assert(_m.not_null(), "Mirror cannot be NULL");
993
994 if (fd->is_static() && fd->has_initial_value()) {
995 initialize_static_field(fd, _m, Thread::current());
996 return;
997 }
998
999 BasicType ft = fd->field_type();
1000 switch (ft) {
1001 case T_BYTE:
1002 _m()->byte_field_put(fd->offset(), 0);
1003 break;
1004 case T_CHAR:
1005 _m()->char_field_put(fd->offset(), 0);
1006 break;
1007 case T_DOUBLE:
1008 _m()->double_field_put(fd->offset(), 0);
1009 break;
1010 case T_FLOAT:
1011 _m()->float_field_put(fd->offset(), 0);
1012 break;
1013 case T_INT:
1014 _m()->int_field_put(fd->offset(), 0);
1015 break;
1016 case T_LONG:
1017 _m()->long_field_put(fd->offset(), 0);
1018 break;
1019 case T_SHORT:
1020 _m()->short_field_put(fd->offset(), 0);
1021 break;
1022 case T_BOOLEAN:
1023 _m()->bool_field_put(fd->offset(), false);
1024 break;
1025 case T_ARRAY:
1026 case T_OBJECT: {
1027 // It might be useful to cache the String field, but
1028 // for now just clear out any reference field
1029 oop o = _m()->obj_field(fd->offset());
1030 _m()->obj_field_put(fd->offset(), NULL);
1031 break;
1032 }
1033 default:
1034 ShouldNotReachHere();
1035 break;
1036 }
1037 }
1038 };
1039
1040 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1041 assert(HeapShared::is_heap_object_archiving_allowed(),
1042 "HeapShared::is_heap_object_archiving_allowed() must be true");
1043
1044 for (int t = 0; t <= T_VOID; t++) {
1045 oop m = Universe::_mirrors[t];
1046 if (m != NULL) {
1047 // Update the field at _array_klass_offset to point to the relocated array klass.
1048 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1049 assert(archived_m != NULL, "sanity");
1050 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1051 assert(ak != NULL || t == T_VOID, "should not be NULL");
1052 if (ak != NULL) {
1053 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1054 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1055 }
1056
1057 // Clear the fields. Just to be safe
1058 Klass *k = m->klass();
1059 Handle archived_mirror_h(THREAD, archived_m);
1060 ResetMirrorField reset(archived_mirror_h);
1061 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1062
1063 log_trace(cds, heap, mirror)(
1064 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1065 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1066
1067 Universe::_mirrors[t] = archived_m;
1068 }
1069 }
1070
1071 assert(Universe::_mirrors[T_INT] != NULL &&
1072 Universe::_mirrors[T_FLOAT] != NULL &&
1073 Universe::_mirrors[T_DOUBLE] != NULL &&
1074 Universe::_mirrors[T_BYTE] != NULL &&
1075 Universe::_mirrors[T_BOOLEAN] != NULL &&
1076 Universe::_mirrors[T_CHAR] != NULL &&
1077 Universe::_mirrors[T_LONG] != NULL &&
1078 Universe::_mirrors[T_SHORT] != NULL &&
1079 Universe::_mirrors[T_VOID] != NULL, "sanity");
1080
1081 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1082 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1083 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1084 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1085 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1086 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1087 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1088 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1089 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1090 }
1091
1092 //
1093 // After the mirror object is successfully archived, the archived
1094 // klass is set with _has_archived_raw_mirror flag.
1095 //
1096 // The _has_archived_raw_mirror flag is cleared at runtime when the
1097 // archived mirror is restored. If archived java heap data cannot
1098 // be used at runtime, new mirror object is created for the shared
1099 // class. The _has_archived_raw_mirror is cleared also during the process.
1100 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1101 assert(HeapShared::is_heap_object_archiving_allowed(),
1102 "HeapShared::is_heap_object_archiving_allowed() must be true");
1103
1104 // Mirror is already archived
1105 if (k->has_raw_archived_mirror()) {
1106 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1107 return k->archived_java_mirror_raw();
1108 }
1109
1110 // No mirror
1111 oop mirror = k->java_mirror();
1112 if (mirror == NULL) {
1113 return NULL;
1114 }
1115
1116 if (k->is_instance_klass()) {
1117 InstanceKlass *ik = InstanceKlass::cast(k);
1118 assert(ik->signers() == NULL, "class with signer should have been excluded");
1119
1120 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1121 ik->is_shared_app_class())) {
1122 // Archiving mirror for classes from non-builtin loaders is not
1123 // supported. Clear the _java_mirror within the archived class.
1124 k->set_java_mirror_handle(NULL);
1125 return NULL;
1126 }
1127 }
1128
1129 // Now start archiving the mirror object
1130 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1131 if (archived_mirror == NULL) {
1132 return NULL;
1133 }
1134
1135 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1136 if (archived_mirror == NULL) {
1137 return NULL;
1138 }
1139
1140 k->set_archived_java_mirror_raw(archived_mirror);
1141
1142 k->set_has_raw_archived_mirror();
1143
1144 ResourceMark rm;
1145 log_trace(cds, heap, mirror)(
1146 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1147 k->external_name(), p2i(mirror), p2i(archived_mirror));
1148
1149 return archived_mirror;
1150 }
1151
1152 // The process is based on create_mirror().
1153 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1154 oop archived_mirror,
1155 Thread *THREAD) {
1156 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1157 // to archived metadata and objects below.
1158 Klass *c = archived_mirror->klass();
1159 Handle archived_mirror_h(THREAD, archived_mirror);
1160 ResetMirrorField reset(archived_mirror_h);
1161 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1162
1163 if (k->is_array_klass()) {
1164 oop archived_comp_mirror;
1165 if (k->is_typeArray_klass()) {
1166 // The primitive type mirrors are already archived. Get the archived mirror.
1167 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1168 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1169 assert(archived_comp_mirror != NULL, "Must be");
1170 } else {
1171 assert(k->is_objArray_klass(), "Must be");
1172 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1173 assert(element_klass != NULL, "Must have an element klass");
1174 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1175 if (archived_comp_mirror == NULL) {
1176 return NULL;
1177 }
1178 }
1179 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1180 } else {
1181 assert(k->is_instance_klass(), "Must be");
1182
1183 // Reset local static fields in the mirror
1184 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1185
1186 java_lang_Class:set_init_lock(archived_mirror, NULL);
1187
1188 set_protection_domain(archived_mirror, NULL);
1189 }
1190
1191 // clear class loader and mirror_module_field
1192 set_class_loader(archived_mirror, NULL);
1193 set_module(archived_mirror, NULL);
1194
1195 // The archived mirror's field at _klass_offset is still pointing to the original
1196 // klass. Updated the field in the archived mirror to point to the relocated
1197 // klass in the archive.
1198 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1199 log_debug(cds, heap, mirror)(
1200 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1201 p2i(as_Klass(mirror)), p2i(reloc_k));
1202 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1203
1204 // The field at _array_klass_offset is pointing to the original one dimension
1205 // higher array klass if exists. Relocate the pointer.
1206 Klass *arr = array_klass_acquire(mirror);
1207 if (arr != NULL) {
1208 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1209 log_debug(cds, heap, mirror)(
1210 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1211 p2i(arr), p2i(reloc_arr));
1212 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1213 }
1214 return archived_mirror;
1215 }
1216
1217 // Returns true if the mirror is updated, false if no archived mirror
1218 // data is present. After the archived mirror object is restored, the
1219 // shared klass' _has_raw_archived_mirror flag is cleared.
1220 bool java_lang_Class::restore_archived_mirror(Klass *k,
1221 Handle class_loader, Handle module,
1222 Handle protection_domain, TRAPS) {
1223 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1224 // see more details in SystemDictionary::resolve_well_known_classes().
1225 if (!SystemDictionary::Class_klass_loaded()) {
1226 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1227 fixup_mirror_list()->push(k);
1228 return true;
1229 }
1230
1231 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1232
1233 if (m == NULL) {
1234 return false;
1235 }
1236
1237 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1238
1239 // mirror is archived, restore
1240 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1241 Handle mirror(THREAD, m);
1242
1243 if (!k->is_array_klass()) {
1244 // - local static final fields with initial values were initialized at dump time
1245
1246 // create the init_lock
1247 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1248 set_init_lock(mirror(), r);
1249
1250 if (protection_domain.not_null()) {
1251 set_protection_domain(mirror(), protection_domain());
1252 }
1253 }
1254
1255 assert(class_loader() == k->class_loader(), "should be same");
1256 if (class_loader.not_null()) {
1257 set_class_loader(mirror(), class_loader());
1258 }
1259
1260 k->set_java_mirror(mirror);
1261 k->clear_has_raw_archived_mirror();
1262
1263 set_mirror_module_field(k, mirror, module, THREAD);
1264
1265 ResourceMark rm;
1266 log_trace(cds, heap, mirror)(
1267 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1268
1269 return true;
1270 }
1271 #endif // INCLUDE_CDS_JAVA_HEAP
1272
1273 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1274 assert(_module_offset != 0, "must have been computed already");
1275 java_lang_Class::set_module(k->java_mirror(), module());
1276 }
1277
1278 int java_lang_Class::oop_size(oop java_class) {
1279 assert(_oop_size_offset != 0, "must be set");
1280 int size = java_class->int_field(_oop_size_offset);
1281 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1282 return size;
1283 }
1284
1285
1286 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1287 assert(_oop_size_offset != 0, "must be set");
1288 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1289 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1290 }
1291
1292 int java_lang_Class::static_oop_field_count(oop java_class) {
1293 assert(_static_oop_field_count_offset != 0, "must be set");
1294 return java_class->int_field(_static_oop_field_count_offset);
1295 }
1296
1297 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1298 assert(_static_oop_field_count_offset != 0, "must be set");
1299 return java_class->int_field_raw(_static_oop_field_count_offset);
1300 }
1301
1302 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1303 assert(_static_oop_field_count_offset != 0, "must be set");
1304 java_class->int_field_put(_static_oop_field_count_offset, size);
1305 }
1306
1307 oop java_lang_Class::protection_domain(oop java_class) {
1308 assert(_protection_domain_offset != 0, "must be set");
1309 return java_class->obj_field(_protection_domain_offset);
1310 }
1311 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1312 assert(_protection_domain_offset != 0, "must be set");
1313 java_class->obj_field_put(_protection_domain_offset, pd);
1314 }
1315
1316 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1317 assert(_component_mirror_offset != 0, "must be set");
1318 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1319 }
1320 oop java_lang_Class::component_mirror(oop java_class) {
1321 assert(_component_mirror_offset != 0, "must be set");
1322 return java_class->obj_field(_component_mirror_offset);
1323 }
1324
1325 oop java_lang_Class::init_lock(oop java_class) {
1326 assert(_init_lock_offset != 0, "must be set");
1327 return java_class->obj_field(_init_lock_offset);
1328 }
1329 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1330 assert(_init_lock_offset != 0, "must be set");
1331 java_class->obj_field_put(_init_lock_offset, init_lock);
1332 }
1333
1334 objArrayOop java_lang_Class::signers(oop java_class) {
1335 assert(_signers_offset != 0, "must be set");
1336 return (objArrayOop)java_class->obj_field(_signers_offset);
1337 }
1338 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1339 assert(_signers_offset != 0, "must be set");
1340 java_class->obj_field_put(_signers_offset, (oop)signers);
1341 }
1342
1343
1344 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1345 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1346 if (_class_loader_offset != 0) {
1347 java_class->obj_field_put(_class_loader_offset, loader);
1348 }
1349 }
1350
1351 oop java_lang_Class::class_loader(oop java_class) {
1352 assert(_class_loader_offset != 0, "must be set");
1353 return java_class->obj_field(_class_loader_offset);
1354 }
1355
1356 oop java_lang_Class::module(oop java_class) {
1357 assert(_module_offset != 0, "must be set");
1358 return java_class->obj_field(_module_offset);
1359 }
1360
1361 void java_lang_Class::set_module(oop java_class, oop module) {
1362 assert(_module_offset != 0, "must be set");
1363 java_class->obj_field_put(_module_offset, module);
1364 }
1365
1366 oop java_lang_Class::name(Handle java_class, TRAPS) {
1367 assert(_name_offset != 0, "must be set");
1368 oop o = java_class->obj_field(_name_offset);
1369 if (o == NULL) {
1370 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1371 java_class->obj_field_put(_name_offset, o);
1372 }
1373 return o;
1374 }
1375
1376 oop java_lang_Class::source_file(oop java_class) {
1377 assert(_source_file_offset != 0, "must be set");
1378 return java_class->obj_field(_source_file_offset);
1379 }
1380
1381 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1382 assert(_source_file_offset != 0, "must be set");
1383 java_class->obj_field_put(_source_file_offset, source_file);
1384 }
1385
1386 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1387 // This should be improved by adding a field at the Java level or by
1388 // introducing a new VM klass (see comment in ClassFileParser)
1389 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1390 if (type != T_VOID) {
1391 Klass* aklass = Universe::typeArrayKlassObj(type);
1392 assert(aklass != NULL, "correct bootstrap");
1393 release_set_array_klass(java_class, aklass);
1394 }
1395 #ifdef ASSERT
1396 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1397 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1398 #endif
1399 return java_class;
1400 }
1401
1402
1403 Klass* java_lang_Class::as_Klass(oop java_class) {
1404 //%note memory_2
1405 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1406 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1407 assert(k == NULL || k->is_klass(), "type check");
1408 return k;
1409 }
1410
1411 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1412 //%note memory_2
1413 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1414 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1415 assert(k == NULL || k->is_klass(), "type check");
1416 return k;
1417 }
1418
1419
1420 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1421 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1422 java_class->metadata_field_put(_klass_offset, klass);
1423 }
1424
1425
1426 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1427 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1428 Symbol* name = NULL;
1429 bool is_instance = false;
1430 if (is_primitive(java_class)) {
1431 name = vmSymbols::type_signature(primitive_type(java_class));
1432 } else {
1433 Klass* k = as_Klass(java_class);
1434 is_instance = k->is_instance_klass();
1435 name = k->name();
1436 }
1437 if (name == NULL) {
1438 st->print("<null>");
1439 return;
1440 }
1441 if (is_instance) st->print("L");
1442 st->write((char*) name->base(), (int) name->utf8_length());
1443 if (is_instance) st->print(";");
1444 }
1445
1446 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1447 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1448 Symbol* name;
1449 if (is_primitive(java_class)) {
1450 name = vmSymbols::type_signature(primitive_type(java_class));
1451 // Because this can create a new symbol, the caller has to decrement
1452 // the refcount, so make adjustment here and below for symbols returned
1453 // that are not created or incremented due to a successful lookup.
1454 name->increment_refcount();
1455 } else {
1456 Klass* k = as_Klass(java_class);
1457 if (!k->is_instance_klass()) {
1458 name = k->name();
1459 name->increment_refcount();
1460 } else {
1461 ResourceMark rm;
1462 const char* sigstr = k->signature_name();
1463 int siglen = (int) strlen(sigstr);
1464 if (!intern_if_not_found) {
1465 name = SymbolTable::probe(sigstr, siglen);
1466 } else {
1467 name = SymbolTable::new_symbol(sigstr, siglen);
1468 }
1469 }
1470 }
1471 return name;
1472 }
1473
1474 // Returns the Java name for this Java mirror (Resource allocated)
1475 // See Klass::external_name().
1476 // For primitive type Java mirrors, its type name is returned.
1477 const char* java_lang_Class::as_external_name(oop java_class) {
1478 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1479 const char* name = NULL;
1480 if (is_primitive(java_class)) {
1481 name = type2name(primitive_type(java_class));
1482 } else {
1483 name = as_Klass(java_class)->external_name();
1484 }
1485 if (name == NULL) {
1486 name = "<null>";
1487 }
1488 return name;
1489 }
1490
1491 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1492 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1493 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1494 return k;
1495 }
1496
1497
1498 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1499 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1500 java_class->release_metadata_field_put(_array_klass_offset, klass);
1501 }
1502
1503
1504 BasicType java_lang_Class::primitive_type(oop java_class) {
1505 assert(java_lang_Class::is_primitive(java_class), "just checking");
1506 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1507 BasicType type = T_VOID;
1508 if (ak != NULL) {
1509 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1510 type = ArrayKlass::cast(ak)->element_type();
1511 } else {
1512 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1513 }
1514 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1515 return type;
1516 }
1517
1518 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1519 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1520 if (is_primitive(java_class)) {
1521 if (reference_klass != NULL)
1522 (*reference_klass) = NULL;
1523 return primitive_type(java_class);
1524 } else {
1525 if (reference_klass != NULL)
1526 (*reference_klass) = as_Klass(java_class);
1527 return T_OBJECT;
1528 }
1529 }
1530
1531
1532 oop java_lang_Class::primitive_mirror(BasicType t) {
1533 oop mirror = Universe::java_mirror(t);
1534 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1535 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1536 return mirror;
1537 }
1538
1539 bool java_lang_Class::offsets_computed = false;
1540 int java_lang_Class::classRedefinedCount_offset = -1;
1541
1542 #define CLASS_FIELDS_DO(macro) \
1543 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1544 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1545 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1546 macro(_module_offset, k, "module", module_signature, false); \
1547 macro(_name_offset, k, "name", string_signature, false); \
1548
1549 void java_lang_Class::compute_offsets() {
1550 if (offsets_computed) {
1551 return;
1552 }
1553
1554 offsets_computed = true;
1555
1556 InstanceKlass* k = SystemDictionary::Class_klass();
1557 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1558
1559 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1560 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1561 // GC treats them the same.
1562 _init_lock_offset = _component_mirror_offset;
1563
1564 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1565 }
1566
1567 #if INCLUDE_CDS
1568 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1569 f->do_bool(&offsets_computed);
1570 f->do_u4((u4*)&_init_lock_offset);
1571
1572 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1573
1574 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1575 }
1576 #endif
1577
1578 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1579 if (classRedefinedCount_offset == -1) {
1580 // If we don't have an offset for it then just return -1 as a marker.
1581 return -1;
1582 }
1583
1584 return the_class_mirror->int_field(classRedefinedCount_offset);
1585 }
1586
1587 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1588 if (classRedefinedCount_offset == -1) {
1589 // If we don't have an offset for it then nothing to set.
1590 return;
1591 }
1592
1593 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1594 }
1595
1596
1597 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1598 // platform thread structure, and a eetop offset which was used for thread
1599 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1600 // merged, so in the HotSpot VM we just use the eetop field for the thread
1601 // instead of the privateInfo_offset.
1602 //
1603 // Note: The stackSize field is only present starting in 1.4.
1604
1605 int java_lang_Thread::_name_offset = 0;
1606 int java_lang_Thread::_group_offset = 0;
1607 int java_lang_Thread::_contextClassLoader_offset = 0;
1608 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1609 int java_lang_Thread::_priority_offset = 0;
1610 int java_lang_Thread::_eetop_offset = 0;
1611 int java_lang_Thread::_daemon_offset = 0;
1612 int java_lang_Thread::_stillborn_offset = 0;
1613 int java_lang_Thread::_stackSize_offset = 0;
1614 int java_lang_Thread::_tid_offset = 0;
1615 int java_lang_Thread::_thread_status_offset = 0;
1616 int java_lang_Thread::_park_blocker_offset = 0;
1617
1618 #define THREAD_FIELDS_DO(macro) \
1619 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1620 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1621 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1622 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1623 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1624 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1625 macro(_eetop_offset, k, "eetop", long_signature, false); \
1626 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1627 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1628 macro(_tid_offset, k, "tid", long_signature, false); \
1629 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1630 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false)
1631
1632 void java_lang_Thread::compute_offsets() {
1633 assert(_group_offset == 0, "offsets should be initialized only once");
1634
1635 InstanceKlass* k = SystemDictionary::Thread_klass();
1636 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1637 }
1638
1639 #if INCLUDE_CDS
1640 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1641 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1642 }
1643 #endif
1644
1645 JavaThread* java_lang_Thread::thread(oop java_thread) {
1646 return (JavaThread*)java_thread->address_field(_eetop_offset);
1647 }
1648
1649
1650 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1651 java_thread->address_field_put(_eetop_offset, (address)thread);
1652 }
1653
1654
1655 oop java_lang_Thread::name(oop java_thread) {
1656 return java_thread->obj_field(_name_offset);
1657 }
1658
1659
1660 void java_lang_Thread::set_name(oop java_thread, oop name) {
1661 java_thread->obj_field_put(_name_offset, name);
1662 }
1663
1664
1665 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1666 return (ThreadPriority)java_thread->int_field(_priority_offset);
1667 }
1668
1669
1670 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1671 java_thread->int_field_put(_priority_offset, priority);
1672 }
1673
1674
1675 oop java_lang_Thread::threadGroup(oop java_thread) {
1676 return java_thread->obj_field(_group_offset);
1677 }
1678
1679
1680 bool java_lang_Thread::is_stillborn(oop java_thread) {
1681 return java_thread->bool_field(_stillborn_offset) != 0;
1682 }
1683
1684
1685 // We never have reason to turn the stillborn bit off
1686 void java_lang_Thread::set_stillborn(oop java_thread) {
1687 java_thread->bool_field_put(_stillborn_offset, true);
1688 }
1689
1690
1691 bool java_lang_Thread::is_alive(oop java_thread) {
1692 JavaThread* thr = java_lang_Thread::thread(java_thread);
1693 return (thr != NULL);
1694 }
1695
1696
1697 bool java_lang_Thread::is_daemon(oop java_thread) {
1698 return java_thread->bool_field(_daemon_offset) != 0;
1699 }
1700
1701
1702 void java_lang_Thread::set_daemon(oop java_thread) {
1703 java_thread->bool_field_put(_daemon_offset, true);
1704 }
1705
1706 oop java_lang_Thread::context_class_loader(oop java_thread) {
1707 return java_thread->obj_field(_contextClassLoader_offset);
1708 }
1709
1710 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1711 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1712 }
1713
1714
1715 jlong java_lang_Thread::stackSize(oop java_thread) {
1716 return java_thread->long_field(_stackSize_offset);
1717 }
1718
1719 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1720 void java_lang_Thread::set_thread_status(oop java_thread,
1721 java_lang_Thread::ThreadStatus status) {
1722 java_thread->int_field_put(_thread_status_offset, status);
1723 }
1724
1725 // Read thread status value from threadStatus field in java.lang.Thread java class.
1726 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1727 // Make sure the caller is operating on behalf of the VM or is
1728 // running VM code (state == _thread_in_vm).
1729 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1730 JavaThread::current()->thread_state() == _thread_in_vm,
1731 "Java Thread is not running in vm");
1732 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1733 }
1734
1735
1736 jlong java_lang_Thread::thread_id(oop java_thread) {
1737 return java_thread->long_field(_tid_offset);
1738 }
1739
1740 oop java_lang_Thread::park_blocker(oop java_thread) {
1741 return java_thread->obj_field(_park_blocker_offset);
1742 }
1743
1744 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1745 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1746 switch (status) {
1747 case NEW : return "NEW";
1748 case RUNNABLE : return "RUNNABLE";
1749 case SLEEPING : return "TIMED_WAITING (sleeping)";
1750 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1751 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1752 case PARKED : return "WAITING (parking)";
1753 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1754 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1755 case TERMINATED : return "TERMINATED";
1756 default : return "UNKNOWN";
1757 };
1758 }
1759 int java_lang_ThreadGroup::_parent_offset = 0;
1760 int java_lang_ThreadGroup::_name_offset = 0;
1761 int java_lang_ThreadGroup::_threads_offset = 0;
1762 int java_lang_ThreadGroup::_groups_offset = 0;
1763 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1764 int java_lang_ThreadGroup::_destroyed_offset = 0;
1765 int java_lang_ThreadGroup::_daemon_offset = 0;
1766 int java_lang_ThreadGroup::_nthreads_offset = 0;
1767 int java_lang_ThreadGroup::_ngroups_offset = 0;
1768
1769 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1770 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1771 return java_thread_group->obj_field(_parent_offset);
1772 }
1773
1774 // ("name as oop" accessor is not necessary)
1775
1776 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1777 oop name = java_thread_group->obj_field(_name_offset);
1778 // ThreadGroup.name can be null
1779 if (name != NULL) {
1780 return java_lang_String::as_utf8_string(name);
1781 }
1782 return NULL;
1783 }
1784
1785 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1786 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1787 return java_thread_group->int_field(_nthreads_offset);
1788 }
1789
1790 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1791 oop threads = java_thread_group->obj_field(_threads_offset);
1792 assert(threads != NULL, "threadgroups should have threads");
1793 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1794 return objArrayOop(threads);
1795 }
1796
1797 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1798 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1799 return java_thread_group->int_field(_ngroups_offset);
1800 }
1801
1802 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1803 oop groups = java_thread_group->obj_field(_groups_offset);
1804 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1805 return objArrayOop(groups);
1806 }
1807
1808 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1809 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1810 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1811 }
1812
1813 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1814 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1815 return java_thread_group->bool_field(_destroyed_offset) != 0;
1816 }
1817
1818 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1819 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1820 return java_thread_group->bool_field(_daemon_offset) != 0;
1821 }
1822
1823 #define THREADGROUP_FIELDS_DO(macro) \
1824 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1825 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1826 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1827 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1828 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1829 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1830 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1831 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1832 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1833
1834 void java_lang_ThreadGroup::compute_offsets() {
1835 assert(_parent_offset == 0, "offsets should be initialized only once");
1836
1837 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1838 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1839 }
1840
1841 #if INCLUDE_CDS
1842 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1843 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1844 }
1845 #endif
1846
1847 #define THROWABLE_FIELDS_DO(macro) \
1848 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1849 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1850 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1851 macro(depth_offset, k, "depth", int_signature, false); \
1852 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1853
1854 void java_lang_Throwable::compute_offsets() {
1855 InstanceKlass* k = SystemDictionary::Throwable_klass();
1856 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1857 }
1858
1859 #if INCLUDE_CDS
1860 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1861 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1862 }
1863 #endif
1864
1865 oop java_lang_Throwable::unassigned_stacktrace() {
1866 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1867 oop base = ik->static_field_base_raw();
1868 return base->obj_field(static_unassigned_stacktrace_offset);
1869 }
1870
1871 oop java_lang_Throwable::backtrace(oop throwable) {
1872 return throwable->obj_field_acquire(backtrace_offset);
1873 }
1874
1875
1876 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1877 throwable->release_obj_field_put(backtrace_offset, value);
1878 }
1879
1880 int java_lang_Throwable::depth(oop throwable) {
1881 return throwable->int_field(depth_offset);
1882 }
1883
1884 void java_lang_Throwable::set_depth(oop throwable, int value) {
1885 throwable->int_field_put(depth_offset, value);
1886 }
1887
1888 oop java_lang_Throwable::message(oop throwable) {
1889 return throwable->obj_field(detailMessage_offset);
1890 }
1891
1892
1893 // Return Symbol for detailed_message or NULL
1894 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1895 PRESERVE_EXCEPTION_MARK; // Keep original exception
1896 oop detailed_message = java_lang_Throwable::message(throwable);
1897 if (detailed_message != NULL) {
1898 return java_lang_String::as_symbol(detailed_message);
1899 }
1900 return NULL;
1901 }
1902
1903 void java_lang_Throwable::set_message(oop throwable, oop value) {
1904 throwable->obj_field_put(detailMessage_offset, value);
1905 }
1906
1907
1908 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1909 throwable->obj_field_put(stackTrace_offset, st_element_array);
1910 }
1911
1912 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1913 set_stacktrace(throwable, NULL);
1914 }
1915
1916
1917 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1918 ResourceMark rm;
1919 Klass* k = throwable->klass();
1920 assert(k != NULL, "just checking");
1921 st->print("%s", k->external_name());
1922 oop msg = message(throwable);
1923 if (msg != NULL) {
1924 st->print(": %s", java_lang_String::as_utf8_string(msg));
1925 }
1926 }
1927
1928 // After this many redefines, the stack trace is unreliable.
1929 const int MAX_VERSION = USHRT_MAX;
1930
1931 static inline bool version_matches(Method* method, int version) {
1932 assert(version < MAX_VERSION, "version is too big");
1933 return method != NULL && (method->constants()->version() == version);
1934 }
1935
1936
1937 // This class provides a simple wrapper over the internal structure of
1938 // exception backtrace to insulate users of the backtrace from needing
1939 // to know what it looks like.
1940 class BacktraceBuilder: public StackObj {
1941 friend class BacktraceIterator;
1942 private:
1943 Handle _backtrace;
1944 objArrayOop _head;
1945 typeArrayOop _methods;
1946 typeArrayOop _bcis;
1947 objArrayOop _mirrors;
1948 typeArrayOop _names; // needed to insulate method name against redefinition
1949 int _index;
1950 NoSafepointVerifier _nsv;
1951
1952 enum {
1953 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1954 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1955 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1956 trace_names_offset = java_lang_Throwable::trace_names_offset,
1957 trace_next_offset = java_lang_Throwable::trace_next_offset,
1958 trace_size = java_lang_Throwable::trace_size,
1959 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1960 };
1961
1962 // get info out of chunks
1963 static typeArrayOop get_methods(objArrayHandle chunk) {
1964 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1965 assert(methods != NULL, "method array should be initialized in backtrace");
1966 return methods;
1967 }
1968 static typeArrayOop get_bcis(objArrayHandle chunk) {
1969 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1970 assert(bcis != NULL, "bci array should be initialized in backtrace");
1971 return bcis;
1972 }
1973 static objArrayOop get_mirrors(objArrayHandle chunk) {
1974 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1975 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1976 return mirrors;
1977 }
1978 static typeArrayOop get_names(objArrayHandle chunk) {
1979 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
1980 assert(names != NULL, "names array should be initialized in backtrace");
1981 return names;
1982 }
1983
1984 public:
1985
1986 // constructor for new backtrace
1987 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
1988 expand(CHECK);
1989 _backtrace = Handle(THREAD, _head);
1990 _index = 0;
1991 }
1992
1993 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
1994 _methods = get_methods(backtrace);
1995 _bcis = get_bcis(backtrace);
1996 _mirrors = get_mirrors(backtrace);
1997 _names = get_names(backtrace);
1998 assert(_methods->length() == _bcis->length() &&
1999 _methods->length() == _mirrors->length() &&
2000 _mirrors->length() == _names->length(),
2001 "method and source information arrays should match");
2002
2003 // head is the preallocated backtrace
2004 _head = backtrace();
2005 _backtrace = Handle(thread, _head);
2006 _index = 0;
2007 }
2008
2009 void expand(TRAPS) {
2010 objArrayHandle old_head(THREAD, _head);
2011 PauseNoSafepointVerifier pnsv(&_nsv);
2012
2013 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2014 objArrayHandle new_head(THREAD, head);
2015
2016 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2017 typeArrayHandle new_methods(THREAD, methods);
2018
2019 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2020 typeArrayHandle new_bcis(THREAD, bcis);
2021
2022 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2023 objArrayHandle new_mirrors(THREAD, mirrors);
2024
2025 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2026 typeArrayHandle new_names(THREAD, names);
2027
2028 if (!old_head.is_null()) {
2029 old_head->obj_at_put(trace_next_offset, new_head());
2030 }
2031 new_head->obj_at_put(trace_methods_offset, new_methods());
2032 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2033 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2034 new_head->obj_at_put(trace_names_offset, new_names());
2035
2036 _head = new_head();
2037 _methods = new_methods();
2038 _bcis = new_bcis();
2039 _mirrors = new_mirrors();
2040 _names = new_names();
2041 _index = 0;
2042 }
2043
2044 oop backtrace() {
2045 return _backtrace();
2046 }
2047
2048 inline void push(Method* method, int bci, TRAPS) {
2049 // Smear the -1 bci to 0 since the array only holds unsigned
2050 // shorts. The later line number lookup would just smear the -1
2051 // to a 0 even if it could be recorded.
2052 if (bci == SynchronizationEntryBCI) bci = 0;
2053
2054 if (_index >= trace_chunk_size) {
2055 methodHandle mhandle(THREAD, method);
2056 expand(CHECK);
2057 method = mhandle();
2058 }
2059
2060 _methods->ushort_at_put(_index, method->orig_method_idnum());
2061 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2062
2063 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2064 // klass owning the symbols alive so their refcounts aren't decremented.
2065 Symbol* name = method->name();
2066 _names->symbol_at_put(_index, name);
2067
2068 // We need to save the mirrors in the backtrace to keep the class
2069 // from being unloaded while we still have this stack trace.
2070 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2071 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2072 _index++;
2073 }
2074
2075 };
2076
2077 struct BacktraceElement : public StackObj {
2078 int _method_id;
2079 int _bci;
2080 int _version;
2081 Symbol* _name;
2082 Handle _mirror;
2083 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2084 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2085 };
2086
2087 class BacktraceIterator : public StackObj {
2088 int _index;
2089 objArrayHandle _result;
2090 objArrayHandle _mirrors;
2091 typeArrayHandle _methods;
2092 typeArrayHandle _bcis;
2093 typeArrayHandle _names;
2094
2095 void init(objArrayHandle result, Thread* thread) {
2096 // Get method id, bci, version and mirror from chunk
2097 _result = result;
2098 if (_result.not_null()) {
2099 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2100 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2101 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2102 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2103 _index = 0;
2104 }
2105 }
2106 public:
2107 BacktraceIterator(objArrayHandle result, Thread* thread) {
2108 init(result, thread);
2109 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2110 }
2111
2112 BacktraceElement next(Thread* thread) {
2113 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2114 _methods->ushort_at(_index),
2115 Backtrace::version_at(_bcis->int_at(_index)),
2116 Backtrace::bci_at(_bcis->int_at(_index)),
2117 _names->symbol_at(_index));
2118 _index++;
2119
2120 if (_index >= java_lang_Throwable::trace_chunk_size) {
2121 int next_offset = java_lang_Throwable::trace_next_offset;
2122 // Get next chunk
2123 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2124 init(result, thread);
2125 }
2126 return e;
2127 }
2128
2129 bool repeat() {
2130 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2131 }
2132 };
2133
2134
2135 // Print stack trace element to resource allocated buffer
2136 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2137 int version, int bci, Symbol* name) {
2138 ResourceMark rm;
2139
2140 // Get strings and string lengths
2141 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2142 const char* klass_name = holder->external_name();
2143 int buf_len = (int)strlen(klass_name);
2144
2145 char* method_name = name->as_C_string();
2146 buf_len += (int)strlen(method_name);
2147
2148 char* source_file_name = NULL;
2149 Symbol* source = Backtrace::get_source_file_name(holder, version);
2150 if (source != NULL) {
2151 source_file_name = source->as_C_string();
2152 buf_len += (int)strlen(source_file_name);
2153 }
2154
2155 char *module_name = NULL, *module_version = NULL;
2156 ModuleEntry* module = holder->module();
2157 if (module->is_named()) {
2158 module_name = module->name()->as_C_string();
2159 buf_len += (int)strlen(module_name);
2160 if (module->version() != NULL) {
2161 module_version = module->version()->as_C_string();
2162 buf_len += (int)strlen(module_version);
2163 }
2164 }
2165
2166 // Allocate temporary buffer with extra space for formatting and line number
2167 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2168
2169 // Print stack trace line in buffer
2170 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2171
2172 // Print module information
2173 if (module_name != NULL) {
2174 if (module_version != NULL) {
2175 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2176 } else {
2177 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2178 }
2179 }
2180
2181 // The method can be NULL if the requested class version is gone
2182 Method* method = holder->method_with_orig_idnum(method_id, version);
2183 if (!version_matches(method, version)) {
2184 strcat(buf, "Redefined)");
2185 } else {
2186 int line_number = Backtrace::get_line_number(method, bci);
2187 if (line_number == -2) {
2188 strcat(buf, "Native Method)");
2189 } else {
2190 if (source_file_name != NULL && (line_number != -1)) {
2191 // Sourcename and linenumber
2192 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2193 } else if (source_file_name != NULL) {
2194 // Just sourcename
2195 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2196 } else {
2197 // Neither sourcename nor linenumber
2198 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2199 }
2200 CompiledMethod* nm = method->code();
2201 if (WizardMode && nm != NULL) {
2202 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2203 }
2204 }
2205 }
2206
2207 st->print_cr("%s", buf);
2208 }
2209
2210 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2211 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2212 int method_id = method->orig_method_idnum();
2213 int version = method->constants()->version();
2214 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2215 }
2216
2217 /**
2218 * Print the throwable message and its stack trace plus all causes by walking the
2219 * cause chain. The output looks the same as of Throwable.printStackTrace().
2220 */
2221 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2222 // First, print the message.
2223 print(throwable(), st);
2224 st->cr();
2225
2226 // Now print the stack trace.
2227 Thread* THREAD = Thread::current();
2228 while (throwable.not_null()) {
2229 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2230 if (result.is_null()) {
2231 st->print_raw_cr("\t<<no stack trace available>>");
2232 return;
2233 }
2234 BacktraceIterator iter(result, THREAD);
2235
2236 while (iter.repeat()) {
2237 BacktraceElement bte = iter.next(THREAD);
2238 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2239 }
2240 {
2241 // Call getCause() which doesn't necessarily return the _cause field.
2242 EXCEPTION_MARK;
2243 JavaValue cause(T_OBJECT);
2244 JavaCalls::call_virtual(&cause,
2245 throwable,
2246 throwable->klass(),
2247 vmSymbols::getCause_name(),
2248 vmSymbols::void_throwable_signature(),
2249 THREAD);
2250 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2251 if (HAS_PENDING_EXCEPTION) {
2252 CLEAR_PENDING_EXCEPTION;
2253 throwable = Handle();
2254 } else {
2255 throwable = Handle(THREAD, (oop) cause.get_jobject());
2256 if (throwable.not_null()) {
2257 st->print("Caused by: ");
2258 print(throwable(), st);
2259 st->cr();
2260 }
2261 }
2262 }
2263 }
2264 }
2265
2266 /**
2267 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2268 */
2269 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2270 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2271 JavaValue result(T_VOID);
2272 JavaCalls::call_virtual(&result,
2273 throwable,
2274 SystemDictionary::Throwable_klass(),
2275 vmSymbols::printStackTrace_name(),
2276 vmSymbols::void_method_signature(),
2277 THREAD);
2278 }
2279
2280 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2281 if (!StackTraceInThrowable) return;
2282 ResourceMark rm(THREAD);
2283
2284 // Start out by clearing the backtrace for this object, in case the VM
2285 // runs out of memory while allocating the stack trace
2286 set_backtrace(throwable(), NULL);
2287 // Clear lazily constructed Java level stacktrace if refilling occurs
2288 // This is unnecessary in 1.7+ but harmless
2289 clear_stacktrace(throwable());
2290
2291 int max_depth = MaxJavaStackTraceDepth;
2292 JavaThread* thread = (JavaThread*)THREAD;
2293
2294 BacktraceBuilder bt(CHECK);
2295
2296 // If there is no Java frame just return the method that was being called
2297 // with bci 0
2298 if (!thread->has_last_Java_frame()) {
2299 if (max_depth >= 1 && method() != NULL) {
2300 bt.push(method(), 0, CHECK);
2301 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2302 set_depth(throwable(), 1);
2303 set_backtrace(throwable(), bt.backtrace());
2304 }
2305 return;
2306 }
2307
2308 // Instead of using vframe directly, this version of fill_in_stack_trace
2309 // basically handles everything by hand. This significantly improved the
2310 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2311 // See bug 6333838 for more details.
2312 // The "ASSERT" here is to verify this method generates the exactly same stack
2313 // trace as utilizing vframe.
2314 #ifdef ASSERT
2315 vframeStream st(thread);
2316 methodHandle st_method(THREAD, st.method());
2317 #endif
2318 int total_count = 0;
2319 RegisterMap map(thread, false);
2320 int decode_offset = 0;
2321 CompiledMethod* nm = NULL;
2322 bool skip_fillInStackTrace_check = false;
2323 bool skip_throwableInit_check = false;
2324 bool skip_hidden = !ShowHiddenFrames;
2325
2326 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2327 Method* method = NULL;
2328 int bci = 0;
2329
2330 // Compiled java method case.
2331 if (decode_offset != 0) {
2332 DebugInfoReadStream stream(nm, decode_offset);
2333 decode_offset = stream.read_int();
2334 method = (Method*)nm->metadata_at(stream.read_int());
2335 bci = stream.read_bci();
2336 } else {
2337 if (fr.is_first_frame()) break;
2338 address pc = fr.pc();
2339 if (fr.is_interpreted_frame()) {
2340 address bcp = fr.interpreter_frame_bcp();
2341 method = fr.interpreter_frame_method();
2342 bci = method->bci_from(bcp);
2343 fr = fr.sender(&map);
2344 } else {
2345 CodeBlob* cb = fr.cb();
2346 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2347 // but non nmethod
2348 fr = fr.sender(&map);
2349 if (cb == NULL || !cb->is_compiled()) {
2350 continue;
2351 }
2352 nm = cb->as_compiled_method();
2353 if (nm->method()->is_native()) {
2354 method = nm->method();
2355 bci = 0;
2356 } else {
2357 PcDesc* pd = nm->pc_desc_at(pc);
2358 decode_offset = pd->scope_decode_offset();
2359 // if decode_offset is not equal to 0, it will execute the
2360 // "compiled java method case" at the beginning of the loop.
2361 continue;
2362 }
2363 }
2364 }
2365 #ifdef ASSERT
2366 assert(st_method() == method && st.bci() == bci,
2367 "Wrong stack trace");
2368 st.next();
2369 // vframeStream::method isn't GC-safe so store off a copy
2370 // of the Method* in case we GC.
2371 if (!st.at_end()) {
2372 st_method = st.method();
2373 }
2374 #endif
2375
2376 // the format of the stacktrace will be:
2377 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2378 // - 0 or more <init> methods for the exception class (skipped)
2379 // - rest of the stack
2380
2381 if (!skip_fillInStackTrace_check) {
2382 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2383 throwable->is_a(method->method_holder())) {
2384 continue;
2385 }
2386 else {
2387 skip_fillInStackTrace_check = true; // gone past them all
2388 }
2389 }
2390 if (!skip_throwableInit_check) {
2391 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2392
2393 // skip <init> methods of the exception class and superclasses
2394 // This is simlar to classic VM.
2395 if (method->name() == vmSymbols::object_initializer_name() &&
2396 throwable->is_a(method->method_holder())) {
2397 continue;
2398 } else {
2399 // there are none or we've seen them all - either way stop checking
2400 skip_throwableInit_check = true;
2401 }
2402 }
2403 if (method->is_hidden()) {
2404 if (skip_hidden) continue;
2405 }
2406 bt.push(method, bci, CHECK);
2407 total_count++;
2408 }
2409
2410 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2411
2412 // Put completed stack trace into throwable object
2413 set_backtrace(throwable(), bt.backtrace());
2414 set_depth(throwable(), total_count);
2415 }
2416
2417 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2418 // No-op if stack trace is disabled
2419 if (!StackTraceInThrowable) {
2420 return;
2421 }
2422
2423 // Disable stack traces for some preallocated out of memory errors
2424 if (!Universe::should_fill_in_stack_trace(throwable)) {
2425 return;
2426 }
2427
2428 PRESERVE_EXCEPTION_MARK;
2429
2430 JavaThread* thread = JavaThread::active();
2431 fill_in_stack_trace(throwable, method, thread);
2432 // ignore exceptions thrown during stack trace filling
2433 CLEAR_PENDING_EXCEPTION;
2434 }
2435
2436 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2437 // Allocate stack trace - backtrace is created but not filled in
2438
2439 // No-op if stack trace is disabled
2440 if (!StackTraceInThrowable) return;
2441 BacktraceBuilder bt(CHECK); // creates a backtrace
2442 set_backtrace(throwable(), bt.backtrace());
2443 }
2444
2445
2446 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2447 // Fill in stack trace into preallocated backtrace (no GC)
2448
2449 // No-op if stack trace is disabled
2450 if (!StackTraceInThrowable) return;
2451
2452 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2453
2454 JavaThread* THREAD = JavaThread::current();
2455
2456 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2457 assert(backtrace.not_null(), "backtrace should have been preallocated");
2458
2459 ResourceMark rm(THREAD);
2460 vframeStream st(THREAD);
2461
2462 BacktraceBuilder bt(THREAD, backtrace);
2463
2464 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2465 // methods as preallocated errors aren't created by "java" code.
2466
2467 // fill in as much stack trace as possible
2468 int chunk_count = 0;
2469 for (;!st.at_end(); st.next()) {
2470 bt.push(st.method(), st.bci(), CHECK);
2471 chunk_count++;
2472
2473 // Bail-out for deep stacks
2474 if (chunk_count >= trace_chunk_size) break;
2475 }
2476 set_depth(throwable(), chunk_count);
2477 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2478
2479 // We support the Throwable immutability protocol defined for Java 7.
2480 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2481 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2482 }
2483
2484 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2485 objArrayHandle stack_trace_array_h, TRAPS) {
2486
2487 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2488 THROW(vmSymbols::java_lang_NullPointerException());
2489 }
2490
2491 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2492
2493 if (stack_trace_array_h->length() != depth(throwable())) {
2494 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2495 }
2496
2497 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2498 BacktraceIterator iter(result, THREAD);
2499
2500 int index = 0;
2501 while (iter.repeat()) {
2502 BacktraceElement bte = iter.next(THREAD);
2503
2504 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2505
2506 if (stack_trace_element.is_null()) {
2507 THROW(vmSymbols::java_lang_NullPointerException());
2508 }
2509
2510 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2511 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2512
2513 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2514 method,
2515 bte._version,
2516 bte._bci,
2517 bte._name, CHECK);
2518 }
2519 }
2520
2521 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2522 // Allocate java.lang.StackTraceElement instance
2523 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2524 assert(k != NULL, "must be loaded in 1.4+");
2525 if (k->should_be_initialized()) {
2526 k->initialize(CHECK_0);
2527 }
2528
2529 Handle element = k->allocate_instance_handle(CHECK_0);
2530
2531 int version = method->constants()->version();
2532 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2533 return element();
2534 }
2535
2536 void java_lang_StackTraceElement::fill_in(Handle element,
2537 InstanceKlass* holder, const methodHandle& method,
2538 int version, int bci, Symbol* name, TRAPS) {
2539 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2540
2541 ResourceMark rm(THREAD);
2542 HandleMark hm(THREAD);
2543
2544 // Fill in class name
2545 Handle java_class(THREAD, holder->java_mirror());
2546 oop classname = java_lang_Class::name(java_class, CHECK);
2547 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2548 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2549
2550 oop loader = holder->class_loader();
2551 if (loader != NULL) {
2552 oop loader_name = java_lang_ClassLoader::name(loader);
2553 if (loader_name != NULL)
2554 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2555 }
2556
2557 // Fill in method name
2558 oop methodname = StringTable::intern(name, CHECK);
2559 java_lang_StackTraceElement::set_methodName(element(), methodname);
2560
2561 // Fill in module name and version
2562 ModuleEntry* module = holder->module();
2563 if (module->is_named()) {
2564 oop module_name = StringTable::intern(module->name(), CHECK);
2565 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2566 oop module_version;
2567 if (module->version() != NULL) {
2568 module_version = StringTable::intern(module->version(), CHECK);
2569 } else {
2570 module_version = NULL;
2571 }
2572 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2573 }
2574
2575 if (method() == NULL || !version_matches(method(), version)) {
2576 // The method was redefined, accurate line number information isn't available
2577 java_lang_StackTraceElement::set_fileName(element(), NULL);
2578 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2579 } else {
2580 // Fill in source file name and line number.
2581 Symbol* source = Backtrace::get_source_file_name(holder, version);
2582 oop source_file = java_lang_Class::source_file(java_class());
2583 if (source != NULL) {
2584 // Class was not redefined. We can trust its cache if set,
2585 // else we have to initialize it.
2586 if (source_file == NULL) {
2587 source_file = StringTable::intern(source, CHECK);
2588 java_lang_Class::set_source_file(java_class(), source_file);
2589 }
2590 } else {
2591 // Class was redefined. Dump the cache if it was set.
2592 if (source_file != NULL) {
2593 source_file = NULL;
2594 java_lang_Class::set_source_file(java_class(), source_file);
2595 }
2596 if (ShowHiddenFrames) {
2597 source = vmSymbols::unknown_class_name();
2598 source_file = StringTable::intern(source, CHECK);
2599 }
2600 }
2601 java_lang_StackTraceElement::set_fileName(element(), source_file);
2602
2603 int line_number = Backtrace::get_line_number(method, bci);
2604 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2605 }
2606 }
2607
2608 #if INCLUDE_JVMCI
2609 void java_lang_StackTraceElement::decode(Handle mirror, methodHandle method, int bci, Symbol*& methodname, Symbol*& filename, int& line_number) {
2610 int method_id = method->orig_method_idnum();
2611 int cpref = method->name_index();
2612 decode(mirror, method_id, method->constants()->version(), bci, cpref, methodname, filename, line_number);
2613 }
2614
2615 void java_lang_StackTraceElement::decode(Handle mirror, int method_id, int version, int bci, int cpref, Symbol*& methodname, Symbol*& filename, int& line_number) {
2616 // Fill in class name
2617 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2618 Method* method = holder->method_with_orig_idnum(method_id, version);
2619
2620 // The method can be NULL if the requested class version is gone
2621 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
2622
2623 // Fill in method name
2624 methodname = sym;
2625
2626 if (!version_matches(method, version)) {
2627 // If the method was redefined, accurate line number information isn't available
2628 filename = NULL;
2629 line_number = -1;
2630 } else {
2631 // Fill in source file name and line number.
2632 // Use a specific ik version as a holder since the mirror might
2633 // refer to a version that is now obsolete and no longer accessible
2634 // via the previous versions list.
2635 holder = holder->get_klass_version(version);
2636 assert(holder != NULL, "sanity check");
2637 Symbol* source = holder->source_file_name();
2638 if (ShowHiddenFrames && source == NULL) {
2639 source = vmSymbols::unknown_class_name();
2640 }
2641 filename = source;
2642 line_number = Backtrace::get_line_number(method, bci);
2643 }
2644 }
2645 #endif // INCLUDE_JVMCI
2646
2647 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2648 HandleMark hm(THREAD);
2649 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2650 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2651 // we should expand MemberName::name when Throwable uses StackTrace
2652 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2653 return method;
2654 }
2655
2656 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2657 // set Method* or mid/cpref
2658 HandleMark hm(THREAD);
2659 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2660 InstanceKlass* ik = method->method_holder();
2661 CallInfo info(method(), ik, CHECK);
2662 MethodHandles::init_method_MemberName(mname, info);
2663 // set bci
2664 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2665 // method may be redefined; store the version
2666 int version = method->constants()->version();
2667 assert((jushort)version == version, "version should be short");
2668 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2669 }
2670
2671 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2672 ResourceMark rm(THREAD);
2673 HandleMark hm(THREAD);
2674 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2675 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2676 InstanceKlass* holder = InstanceKlass::cast(clazz);
2677 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2678
2679 short version = stackFrame->short_field(_version_offset);
2680 short bci = stackFrame->short_field(_bci_offset);
2681 Symbol* name = method->name();
2682 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2683 }
2684
2685 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2686 macro(_memberName_offset, k, "memberName", object_signature, false); \
2687 macro(_bci_offset, k, "bci", short_signature, false)
2688
2689 void java_lang_StackFrameInfo::compute_offsets() {
2690 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2691 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2692 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2693 }
2694
2695 #if INCLUDE_CDS
2696 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2697 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2698 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2699 }
2700 #endif
2701
2702 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2703 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2704 macro(_locals_offset, k, "locals", object_array_signature, false); \
2705 macro(_operands_offset, k, "operands", object_array_signature, false); \
2706 macro(_mode_offset, k, "mode", int_signature, false)
2707
2708 void java_lang_LiveStackFrameInfo::compute_offsets() {
2709 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2710 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2711 }
2712
2713 #if INCLUDE_CDS
2714 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2715 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2716 }
2717 #endif
2718
2719 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2720 macro(override_offset, k, "override", bool_signature, false)
2721
2722 void java_lang_reflect_AccessibleObject::compute_offsets() {
2723 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2724 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2725 }
2726
2727 #if INCLUDE_CDS
2728 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2729 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2730 }
2731 #endif
2732
2733 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2734 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2735 return (jboolean) reflect->bool_field(override_offset);
2736 }
2737
2738 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2739 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2740 reflect->bool_field_put(override_offset, (int) value);
2741 }
2742
2743 #define METHOD_FIELDS_DO(macro) \
2744 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2745 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2746 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2747 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2748 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2749 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2750 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2751 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2752 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2753 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2754 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2755
2756 void java_lang_reflect_Method::compute_offsets() {
2757 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2758 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2759 }
2760
2761 #if INCLUDE_CDS
2762 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2763 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2764 }
2765 #endif
2766
2767 Handle java_lang_reflect_Method::create(TRAPS) {
2768 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2769 Klass* klass = SystemDictionary::reflect_Method_klass();
2770 // This class is eagerly initialized during VM initialization, since we keep a refence
2771 // to one of the methods
2772 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2773 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2774 }
2775
2776 oop java_lang_reflect_Method::clazz(oop reflect) {
2777 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2778 return reflect->obj_field(clazz_offset);
2779 }
2780
2781 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2782 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2783 reflect->obj_field_put(clazz_offset, value);
2784 }
2785
2786 int java_lang_reflect_Method::slot(oop reflect) {
2787 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2788 return reflect->int_field(slot_offset);
2789 }
2790
2791 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2792 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2793 reflect->int_field_put(slot_offset, value);
2794 }
2795
2796 void java_lang_reflect_Method::set_name(oop method, oop value) {
2797 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2798 method->obj_field_put(name_offset, value);
2799 }
2800
2801 oop java_lang_reflect_Method::return_type(oop method) {
2802 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2803 return method->obj_field(returnType_offset);
2804 }
2805
2806 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2807 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2808 method->obj_field_put(returnType_offset, value);
2809 }
2810
2811 oop java_lang_reflect_Method::parameter_types(oop method) {
2812 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2813 return method->obj_field(parameterTypes_offset);
2814 }
2815
2816 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2817 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2818 method->obj_field_put(parameterTypes_offset, value);
2819 }
2820
2821 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2822 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2823 method->obj_field_put(exceptionTypes_offset, value);
2824 }
2825
2826 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2827 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2828 method->int_field_put(modifiers_offset, value);
2829 }
2830
2831 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2832 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2833 method->obj_field_put(signature_offset, value);
2834 }
2835
2836 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2837 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2838 method->obj_field_put(annotations_offset, value);
2839 }
2840
2841 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2842 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2843 method->obj_field_put(parameter_annotations_offset, value);
2844 }
2845
2846 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2847 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2848 method->obj_field_put(annotation_default_offset, value);
2849 }
2850
2851 #define CONSTRUCTOR_FIELDS_DO(macro) \
2852 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2853 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2854 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2855 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2856 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2857 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2858 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2859 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2860
2861 void java_lang_reflect_Constructor::compute_offsets() {
2862 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2863 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2864 }
2865
2866 #if INCLUDE_CDS
2867 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2868 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2869 }
2870 #endif
2871
2872 Handle java_lang_reflect_Constructor::create(TRAPS) {
2873 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2874 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2875 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2876 InstanceKlass* ik = InstanceKlass::cast(k);
2877 // Ensure it is initialized
2878 ik->initialize(CHECK_NH);
2879 return ik->allocate_instance_handle(THREAD);
2880 }
2881
2882 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2883 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2884 return reflect->obj_field(clazz_offset);
2885 }
2886
2887 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2888 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2889 reflect->obj_field_put(clazz_offset, value);
2890 }
2891
2892 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2893 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2894 return constructor->obj_field(parameterTypes_offset);
2895 }
2896
2897 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2898 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2899 constructor->obj_field_put(parameterTypes_offset, value);
2900 }
2901
2902 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2903 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2904 constructor->obj_field_put(exceptionTypes_offset, value);
2905 }
2906
2907 int java_lang_reflect_Constructor::slot(oop reflect) {
2908 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2909 return reflect->int_field(slot_offset);
2910 }
2911
2912 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2913 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2914 reflect->int_field_put(slot_offset, value);
2915 }
2916
2917 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2918 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2919 constructor->int_field_put(modifiers_offset, value);
2920 }
2921
2922 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2923 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2924 constructor->obj_field_put(signature_offset, value);
2925 }
2926
2927 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2928 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2929 constructor->obj_field_put(annotations_offset, value);
2930 }
2931
2932 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2933 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2934 method->obj_field_put(parameter_annotations_offset, value);
2935 }
2936
2937 #define FIELD_FIELDS_DO(macro) \
2938 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2939 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2940 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
2941 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2942 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2943 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2944 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
2945
2946 void java_lang_reflect_Field::compute_offsets() {
2947 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
2948 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2949 }
2950
2951 #if INCLUDE_CDS
2952 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
2953 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2954 }
2955 #endif
2956
2957 Handle java_lang_reflect_Field::create(TRAPS) {
2958 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2959 Symbol* name = vmSymbols::java_lang_reflect_Field();
2960 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2961 InstanceKlass* ik = InstanceKlass::cast(k);
2962 // Ensure it is initialized
2963 ik->initialize(CHECK_NH);
2964 return ik->allocate_instance_handle(THREAD);
2965 }
2966
2967 oop java_lang_reflect_Field::clazz(oop reflect) {
2968 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2969 return reflect->obj_field(clazz_offset);
2970 }
2971
2972 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2973 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2974 reflect->obj_field_put(clazz_offset, value);
2975 }
2976
2977 oop java_lang_reflect_Field::name(oop field) {
2978 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2979 return field->obj_field(name_offset);
2980 }
2981
2982 void java_lang_reflect_Field::set_name(oop field, oop value) {
2983 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2984 field->obj_field_put(name_offset, value);
2985 }
2986
2987 oop java_lang_reflect_Field::type(oop field) {
2988 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2989 return field->obj_field(type_offset);
2990 }
2991
2992 void java_lang_reflect_Field::set_type(oop field, oop value) {
2993 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2994 field->obj_field_put(type_offset, value);
2995 }
2996
2997 int java_lang_reflect_Field::slot(oop reflect) {
2998 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2999 return reflect->int_field(slot_offset);
3000 }
3001
3002 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3003 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3004 reflect->int_field_put(slot_offset, value);
3005 }
3006
3007 int java_lang_reflect_Field::modifiers(oop field) {
3008 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3009 return field->int_field(modifiers_offset);
3010 }
3011
3012 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3013 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3014 field->int_field_put(modifiers_offset, value);
3015 }
3016
3017 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3018 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3019 field->obj_field_put(signature_offset, value);
3020 }
3021
3022 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3023 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3024 field->obj_field_put(annotations_offset, value);
3025 }
3026
3027 #define CONSTANTPOOL_FIELDS_DO(macro) \
3028 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3029
3030 void reflect_ConstantPool::compute_offsets() {
3031 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3032 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3033 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3034 }
3035
3036 #if INCLUDE_CDS
3037 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3038 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3039 }
3040 #endif
3041
3042 #define PARAMETER_FIELDS_DO(macro) \
3043 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3044 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3045 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3046 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3047
3048 void java_lang_reflect_Parameter::compute_offsets() {
3049 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3050 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3051 }
3052
3053 #if INCLUDE_CDS
3054 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3055 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3056 }
3057 #endif
3058
3059 Handle java_lang_reflect_Parameter::create(TRAPS) {
3060 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3061 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3062 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3063 InstanceKlass* ik = InstanceKlass::cast(k);
3064 // Ensure it is initialized
3065 ik->initialize(CHECK_NH);
3066 return ik->allocate_instance_handle(THREAD);
3067 }
3068
3069 oop java_lang_reflect_Parameter::name(oop param) {
3070 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3071 return param->obj_field(name_offset);
3072 }
3073
3074 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3075 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3076 param->obj_field_put(name_offset, value);
3077 }
3078
3079 int java_lang_reflect_Parameter::modifiers(oop param) {
3080 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3081 return param->int_field(modifiers_offset);
3082 }
3083
3084 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3085 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3086 param->int_field_put(modifiers_offset, value);
3087 }
3088
3089 int java_lang_reflect_Parameter::index(oop param) {
3090 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3091 return param->int_field(index_offset);
3092 }
3093
3094 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3095 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3096 param->int_field_put(index_offset, value);
3097 }
3098
3099 oop java_lang_reflect_Parameter::executable(oop param) {
3100 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3101 return param->obj_field(executable_offset);
3102 }
3103
3104 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3105 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3106 param->obj_field_put(executable_offset, value);
3107 }
3108
3109
3110 int java_lang_Module::loader_offset;
3111 int java_lang_Module::name_offset;
3112 int java_lang_Module::_module_entry_offset = -1;
3113
3114 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3115 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3116 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3117 vmSymbols::java_lang_module_init_signature(),
3118 loader, module_name, CHECK_NH);
3119 }
3120
3121 #define MODULE_FIELDS_DO(macro) \
3122 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3123 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3124
3125 void java_lang_Module::compute_offsets() {
3126 InstanceKlass* k = SystemDictionary::Module_klass();
3127 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3128 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3129 }
3130
3131 #if INCLUDE_CDS
3132 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3133 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3134 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3135 }
3136 #endif
3137
3138 oop java_lang_Module::loader(oop module) {
3139 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3140 return module->obj_field(loader_offset);
3141 }
3142
3143 void java_lang_Module::set_loader(oop module, oop value) {
3144 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3145 module->obj_field_put(loader_offset, value);
3146 }
3147
3148 oop java_lang_Module::name(oop module) {
3149 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3150 return module->obj_field(name_offset);
3151 }
3152
3153 void java_lang_Module::set_name(oop module, oop value) {
3154 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3155 module->obj_field_put(name_offset, value);
3156 }
3157
3158 ModuleEntry* java_lang_Module::module_entry(oop module) {
3159 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3160 assert(module != NULL, "module can't be null");
3161 assert(oopDesc::is_oop(module), "module must be oop");
3162
3163 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3164 if (module_entry == NULL) {
3165 // If the inject field containing the ModuleEntry* is null then return the
3166 // class loader's unnamed module.
3167 oop loader = java_lang_Module::loader(module);
3168 Handle h_loader = Handle(Thread::current(), loader);
3169 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3170 return loader_cld->unnamed_module();
3171 }
3172 return module_entry;
3173 }
3174
3175 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3176 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3177 assert(module != NULL, "module can't be null");
3178 assert(oopDesc::is_oop(module), "module must be oop");
3179 module->address_field_put(_module_entry_offset, (address)module_entry);
3180 }
3181
3182 Handle reflect_ConstantPool::create(TRAPS) {
3183 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3184 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3185 // Ensure it is initialized
3186 k->initialize(CHECK_NH);
3187 return k->allocate_instance_handle(THREAD);
3188 }
3189
3190
3191 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3192 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3193 oop mirror = value->pool_holder()->java_mirror();
3194 // Save the mirror to get back the constant pool.
3195 reflect->obj_field_put(_oop_offset, mirror);
3196 }
3197
3198 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3199 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3200
3201 oop mirror = reflect->obj_field(_oop_offset);
3202 Klass* k = java_lang_Class::as_Klass(mirror);
3203 assert(k->is_instance_klass(), "Must be");
3204
3205 // Get the constant pool back from the klass. Since class redefinition
3206 // merges the new constant pool into the old, this is essentially the
3207 // same constant pool as the original. If constant pool merging is
3208 // no longer done in the future, this will have to change to save
3209 // the original.
3210 return InstanceKlass::cast(k)->constants();
3211 }
3212
3213 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3214 macro(_base_offset, k, "base", object_signature, false)
3215
3216 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3217 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3218 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3219 }
3220
3221 #if INCLUDE_CDS
3222 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3223 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3224 }
3225 #endif
3226
3227 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3228 Klass* k = SystemDictionary::box_klass(type);
3229 if (k == NULL) return NULL;
3230 InstanceKlass* ik = InstanceKlass::cast(k);
3231 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3232 return ik->allocate_instance(THREAD);
3233 }
3234
3235
3236 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3237 oop box = initialize_and_allocate(type, CHECK_0);
3238 if (box == NULL) return NULL;
3239 switch (type) {
3240 case T_BOOLEAN:
3241 box->bool_field_put(value_offset, value->z);
3242 break;
3243 case T_CHAR:
3244 box->char_field_put(value_offset, value->c);
3245 break;
3246 case T_FLOAT:
3247 box->float_field_put(value_offset, value->f);
3248 break;
3249 case T_DOUBLE:
3250 box->double_field_put(long_value_offset, value->d);
3251 break;
3252 case T_BYTE:
3253 box->byte_field_put(value_offset, value->b);
3254 break;
3255 case T_SHORT:
3256 box->short_field_put(value_offset, value->s);
3257 break;
3258 case T_INT:
3259 box->int_field_put(value_offset, value->i);
3260 break;
3261 case T_LONG:
3262 box->long_field_put(long_value_offset, value->j);
3263 break;
3264 default:
3265 return NULL;
3266 }
3267 return box;
3268 }
3269
3270
3271 BasicType java_lang_boxing_object::basic_type(oop box) {
3272 if (box == NULL) return T_ILLEGAL;
3273 BasicType type = SystemDictionary::box_klass_type(box->klass());
3274 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3275 return T_ILLEGAL;
3276 return type;
3277 }
3278
3279
3280 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3281 BasicType type = SystemDictionary::box_klass_type(box->klass());
3282 switch (type) {
3283 case T_BOOLEAN:
3284 value->z = box->bool_field(value_offset);
3285 break;
3286 case T_CHAR:
3287 value->c = box->char_field(value_offset);
3288 break;
3289 case T_FLOAT:
3290 value->f = box->float_field(value_offset);
3291 break;
3292 case T_DOUBLE:
3293 value->d = box->double_field(long_value_offset);
3294 break;
3295 case T_BYTE:
3296 value->b = box->byte_field(value_offset);
3297 break;
3298 case T_SHORT:
3299 value->s = box->short_field(value_offset);
3300 break;
3301 case T_INT:
3302 value->i = box->int_field(value_offset);
3303 break;
3304 case T_LONG:
3305 value->j = box->long_field(long_value_offset);
3306 break;
3307 default:
3308 return T_ILLEGAL;
3309 } // end switch
3310 return type;
3311 }
3312
3313
3314 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3315 BasicType type = SystemDictionary::box_klass_type(box->klass());
3316 switch (type) {
3317 case T_BOOLEAN:
3318 box->bool_field_put(value_offset, value->z);
3319 break;
3320 case T_CHAR:
3321 box->char_field_put(value_offset, value->c);
3322 break;
3323 case T_FLOAT:
3324 box->float_field_put(value_offset, value->f);
3325 break;
3326 case T_DOUBLE:
3327 box->double_field_put(long_value_offset, value->d);
3328 break;
3329 case T_BYTE:
3330 box->byte_field_put(value_offset, value->b);
3331 break;
3332 case T_SHORT:
3333 box->short_field_put(value_offset, value->s);
3334 break;
3335 case T_INT:
3336 box->int_field_put(value_offset, value->i);
3337 break;
3338 case T_LONG:
3339 box->long_field_put(long_value_offset, value->j);
3340 break;
3341 default:
3342 return T_ILLEGAL;
3343 } // end switch
3344 return type;
3345 }
3346
3347
3348 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3349 switch (type) {
3350 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3351 case T_CHAR: st->print("%d", value->c); break;
3352 case T_BYTE: st->print("%d", value->b); break;
3353 case T_SHORT: st->print("%d", value->s); break;
3354 case T_INT: st->print("%d", value->i); break;
3355 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3356 case T_FLOAT: st->print("%f", value->f); break;
3357 case T_DOUBLE: st->print("%lf", value->d); break;
3358 default: st->print("type %d?", type); break;
3359 }
3360 }
3361
3362 // Support for java_lang_ref_Reference
3363
3364 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3365 assert(obj != NULL, "sanity");
3366 if (offset != java_lang_ref_Reference::referent_offset) {
3367 return false;
3368 }
3369
3370 Klass* k = obj->klass();
3371 if (!k->is_instance_klass()) {
3372 return false;
3373 }
3374
3375 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3376 bool is_reference = ik->reference_type() != REF_NONE;
3377 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3378 return is_reference;
3379 }
3380
3381 // Support for java_lang_ref_SoftReference
3382 //
3383
3384 #define SOFTREFERENCE_FIELDS_DO(macro) \
3385 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3386 macro(static_clock_offset, k, "clock", long_signature, true)
3387
3388 void java_lang_ref_SoftReference::compute_offsets() {
3389 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3390 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3391 }
3392
3393 #if INCLUDE_CDS
3394 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3395 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3396 }
3397 #endif
3398
3399 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3400 return ref->long_field(timestamp_offset);
3401 }
3402
3403 jlong java_lang_ref_SoftReference::clock() {
3404 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3405 oop base = ik->static_field_base_raw();
3406 return base->long_field(static_clock_offset);
3407 }
3408
3409 void java_lang_ref_SoftReference::set_clock(jlong value) {
3410 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3411 oop base = ik->static_field_base_raw();
3412 base->long_field_put(static_clock_offset, value);
3413 }
3414
3415 // Support for java_lang_invoke_DirectMethodHandle
3416
3417 int java_lang_invoke_DirectMethodHandle::_member_offset;
3418
3419 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3420 oop member_name = NULL;
3421 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3422 "a DirectMethodHandle oop is expected");
3423 return dmh->obj_field(member_offset_in_bytes());
3424 }
3425
3426 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3427 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3428
3429 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3430 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3431 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3432 }
3433
3434 #if INCLUDE_CDS
3435 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3436 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3437 }
3438 #endif
3439
3440 // Support for java_lang_invoke_MethodHandle
3441
3442 int java_lang_invoke_MethodHandle::_type_offset;
3443 int java_lang_invoke_MethodHandle::_form_offset;
3444
3445 int java_lang_invoke_MemberName::_clazz_offset;
3446 int java_lang_invoke_MemberName::_name_offset;
3447 int java_lang_invoke_MemberName::_type_offset;
3448 int java_lang_invoke_MemberName::_flags_offset;
3449 int java_lang_invoke_MemberName::_method_offset;
3450 int java_lang_invoke_MemberName::_vmindex_offset;
3451
3452 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3453 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3454
3455 int java_lang_invoke_LambdaForm::_vmentry_offset;
3456
3457 #define METHODHANDLE_FIELDS_DO(macro) \
3458 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3459 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3460
3461 void java_lang_invoke_MethodHandle::compute_offsets() {
3462 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3463 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3464 }
3465
3466 #if INCLUDE_CDS
3467 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3468 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3469 }
3470 #endif
3471
3472 #define MEMBERNAME_FIELDS_DO(macro) \
3473 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3474 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3475 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3476 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3477 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3478
3479 void java_lang_invoke_MemberName::compute_offsets() {
3480 InstanceKlass* k = SystemDictionary::MemberName_klass();
3481 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3482 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3483 }
3484
3485 #if INCLUDE_CDS
3486 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3487 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3488 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3489 }
3490 #endif
3491
3492 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3493 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3494 assert(k != NULL, "jdk mismatch");
3495 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3496 }
3497
3498 #if INCLUDE_CDS
3499 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3500 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3501 }
3502 #endif
3503
3504 #define LAMBDAFORM_FIELDS_DO(macro) \
3505 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3506
3507 void java_lang_invoke_LambdaForm::compute_offsets() {
3508 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3509 assert (k != NULL, "jdk mismatch");
3510 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3511 }
3512
3513 #if INCLUDE_CDS
3514 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3515 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3516 }
3517 #endif
3518
3519 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3520 return obj != NULL && is_subclass(obj->klass());
3521 }
3522
3523
3524 oop java_lang_invoke_MethodHandle::type(oop mh) {
3525 return mh->obj_field(_type_offset);
3526 }
3527
3528 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3529 mh->obj_field_put(_type_offset, mtype);
3530 }
3531
3532 oop java_lang_invoke_MethodHandle::form(oop mh) {
3533 assert(_form_offset != 0, "");
3534 return mh->obj_field(_form_offset);
3535 }
3536
3537 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3538 assert(_form_offset != 0, "");
3539 mh->obj_field_put(_form_offset, lform);
3540 }
3541
3542 /// MemberName accessors
3543
3544 oop java_lang_invoke_MemberName::clazz(oop mname) {
3545 assert(is_instance(mname), "wrong type");
3546 return mname->obj_field(_clazz_offset);
3547 }
3548
3549 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3550 assert(is_instance(mname), "wrong type");
3551 mname->obj_field_put(_clazz_offset, clazz);
3552 }
3553
3554 oop java_lang_invoke_MemberName::name(oop mname) {
3555 assert(is_instance(mname), "wrong type");
3556 return mname->obj_field(_name_offset);
3557 }
3558
3559 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3560 assert(is_instance(mname), "wrong type");
3561 mname->obj_field_put(_name_offset, name);
3562 }
3563
3564 oop java_lang_invoke_MemberName::type(oop mname) {
3565 assert(is_instance(mname), "wrong type");
3566 return mname->obj_field(_type_offset);
3567 }
3568
3569 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3570 assert(is_instance(mname), "wrong type");
3571 mname->obj_field_put(_type_offset, type);
3572 }
3573
3574 int java_lang_invoke_MemberName::flags(oop mname) {
3575 assert(is_instance(mname), "wrong type");
3576 return mname->int_field(_flags_offset);
3577 }
3578
3579 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3580 assert(is_instance(mname), "wrong type");
3581 mname->int_field_put(_flags_offset, flags);
3582 }
3583
3584
3585 // Return vmtarget from ResolvedMethodName method field through indirection
3586 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3587 assert(is_instance(mname), "wrong type");
3588 oop method = mname->obj_field(_method_offset);
3589 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3590 }
3591
3592 bool java_lang_invoke_MemberName::is_method(oop mname) {
3593 assert(is_instance(mname), "must be MemberName");
3594 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3595 }
3596
3597 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3598 assert(is_instance(mname), "wrong type");
3599 mname->obj_field_put(_method_offset, resolved_method);
3600 }
3601
3602 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3603 assert(is_instance(mname), "wrong type");
3604 return (intptr_t) mname->address_field(_vmindex_offset);
3605 }
3606
3607 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3608 assert(is_instance(mname), "wrong type");
3609 mname->address_field_put(_vmindex_offset, (address) index);
3610 }
3611
3612
3613 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3614 assert(is_instance(resolved_method), "wrong type");
3615 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3616 assert(m->is_method(), "must be");
3617 return m;
3618 }
3619
3620 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3621 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3622 assert(is_instance(resolved_method), "wrong type");
3623 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3624 }
3625
3626 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
3627 assert(is_instance(resolved_method), "wrong type");
3628 resolved_method->obj_field_put(_vmholder_offset, holder);
3629 }
3630
3631 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3632 const Method* method = m();
3633
3634 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3635 oop resolved_method = ResolvedMethodTable::find_method(method);
3636 if (resolved_method != NULL) {
3637 return resolved_method;
3638 }
3639
3640 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3641 if (!k->is_initialized()) {
3642 k->initialize(CHECK_NULL);
3643 }
3644
3645 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3646
3647 NoSafepointVerifier nsv;
3648
3649 if (method->is_old()) {
3650 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
3651 method->get_new_method();
3652 }
3653
3654 InstanceKlass* holder = method->method_holder();
3655
3656 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
3657 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3658 // distinct loaders) to ensure the metadata is kept alive.
3659 // This mirror may be different than the one in clazz field.
3660 set_vmholder(new_resolved_method, holder->java_mirror());
3661
3662 // Set flag in class to indicate this InstanceKlass has entries in the table
3663 // to avoid walking table during redefinition if none of the redefined classes
3664 // have any membernames in the table.
3665 holder->set_has_resolved_methods();
3666
3667 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
3668 }
3669
3670 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3671 assert(is_instance(lform), "wrong type");
3672 return lform->obj_field(_vmentry_offset);
3673 }
3674
3675
3676 // Support for java_lang_invoke_MethodType
3677
3678 int java_lang_invoke_MethodType::_rtype_offset;
3679 int java_lang_invoke_MethodType::_ptypes_offset;
3680
3681 #define METHODTYPE_FIELDS_DO(macro) \
3682 macro(_rtype_offset, k, "rtype", class_signature, false); \
3683 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3684
3685 void java_lang_invoke_MethodType::compute_offsets() {
3686 InstanceKlass* k = SystemDictionary::MethodType_klass();
3687 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3688 }
3689
3690 #if INCLUDE_CDS
3691 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3692 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3693 }
3694 #endif
3695
3696 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3697 st->print("(");
3698 objArrayOop pts = ptypes(mt);
3699 for (int i = 0, limit = pts->length(); i < limit; i++) {
3700 java_lang_Class::print_signature(pts->obj_at(i), st);
3701 }
3702 st->print(")");
3703 java_lang_Class::print_signature(rtype(mt), st);
3704 }
3705
3706 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
3707 ResourceMark rm;
3708 stringStream buffer(128);
3709 print_signature(mt, &buffer);
3710 const char* sigstr = buffer.base();
3711 int siglen = (int) buffer.size();
3712 Symbol *name;
3713 if (!intern_if_not_found) {
3714 name = SymbolTable::probe(sigstr, siglen);
3715 } else {
3716 name = SymbolTable::new_symbol(sigstr, siglen);
3717 }
3718 return name;
3719 }
3720
3721 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3722 if (oopDesc::equals(mt1, mt2))
3723 return true;
3724 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3725 return false;
3726 if (ptype_count(mt1) != ptype_count(mt2))
3727 return false;
3728 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3729 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3730 return false;
3731 }
3732 return true;
3733 }
3734
3735 oop java_lang_invoke_MethodType::rtype(oop mt) {
3736 assert(is_instance(mt), "must be a MethodType");
3737 return mt->obj_field(_rtype_offset);
3738 }
3739
3740 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3741 assert(is_instance(mt), "must be a MethodType");
3742 return (objArrayOop) mt->obj_field(_ptypes_offset);
3743 }
3744
3745 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3746 return ptypes(mt)->obj_at(idx);
3747 }
3748
3749 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3750 return ptypes(mt)->length();
3751 }
3752
3753 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3754 objArrayOop pts = ptypes(mt);
3755 int count = pts->length();
3756 int slots = 0;
3757 for (int i = 0; i < count; i++) {
3758 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3759 slots += type2size[bt];
3760 }
3761 return slots;
3762 }
3763
3764 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3765 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3766 return type2size[bt];
3767 }
3768
3769
3770 // Support for java_lang_invoke_CallSite
3771
3772 int java_lang_invoke_CallSite::_target_offset;
3773 int java_lang_invoke_CallSite::_context_offset;
3774
3775 #define CALLSITE_FIELDS_DO(macro) \
3776 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3777 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3778
3779 void java_lang_invoke_CallSite::compute_offsets() {
3780 InstanceKlass* k = SystemDictionary::CallSite_klass();
3781 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3782 }
3783
3784 #if INCLUDE_CDS
3785 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3786 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3787 }
3788 #endif
3789
3790 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3791 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3792
3793 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3794 return dep_oop;
3795 }
3796
3797 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3798
3799 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3800 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3801
3802 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3803 InstanceKlass* k = SystemDictionary::Context_klass();
3804 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3805 }
3806
3807 #if INCLUDE_CDS
3808 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3809 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3810 }
3811 #endif
3812
3813 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3814 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3815 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3816 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3817 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3818 return dep_ctx;
3819 }
3820
3821 // Support for java_security_AccessControlContext
3822
3823 int java_security_AccessControlContext::_context_offset = 0;
3824 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3825 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3826 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3827
3828 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3829 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3830 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3831 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3832 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3833
3834 void java_security_AccessControlContext::compute_offsets() {
3835 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3836 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3837 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3838 }
3839
3840 #if INCLUDE_CDS
3841 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3842 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3843 }
3844 #endif
3845
3846 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3847 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3848 // Ensure klass is initialized
3849 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3850 // Allocate result
3851 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3852 // Fill in values
3853 result->obj_field_put(_context_offset, context());
3854 result->obj_field_put(_privilegedContext_offset, privileged_context());
3855 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3856 // whitelist AccessControlContexts created by the JVM if present
3857 if (_isAuthorized_offset != -1) {
3858 result->bool_field_put(_isAuthorized_offset, true);
3859 }
3860 return result;
3861 }
3862
3863
3864 // Support for java_lang_ClassLoader
3865
3866 bool java_lang_ClassLoader::offsets_computed = false;
3867 int java_lang_ClassLoader::_loader_data_offset = -1;
3868 int java_lang_ClassLoader::parallelCapable_offset = -1;
3869 int java_lang_ClassLoader::name_offset = -1;
3870 int java_lang_ClassLoader::nameAndId_offset = -1;
3871 int java_lang_ClassLoader::unnamedModule_offset = -1;
3872
3873 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3874 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3875 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3876 }
3877
3878 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3879 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3880 return RawAccess<>::load_at(loader, _loader_data_offset);
3881 }
3882
3883 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3884 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3885 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3886 }
3887
3888 #define CLASSLOADER_FIELDS_DO(macro) \
3889 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3890 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3891 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3892 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3893 macro(parent_offset, k1, "parent", classloader_signature, false)
3894
3895 void java_lang_ClassLoader::compute_offsets() {
3896 assert(!offsets_computed, "offsets should be initialized only once");
3897 offsets_computed = true;
3898
3899 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3900 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3901
3902 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3903 }
3904
3905 #if INCLUDE_CDS
3906 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3907 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3908 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3909 }
3910 #endif
3911
3912 oop java_lang_ClassLoader::parent(oop loader) {
3913 assert(is_instance(loader), "loader must be oop");
3914 return loader->obj_field(parent_offset);
3915 }
3916
3917 // Returns the name field of this class loader. If the name field has not
3918 // been set, null will be returned.
3919 oop java_lang_ClassLoader::name(oop loader) {
3920 assert(is_instance(loader), "loader must be oop");
3921 return loader->obj_field(name_offset);
3922 }
3923
3924 // Returns the nameAndId field of this class loader. The format is
3925 // as follows:
3926 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
3927 // If the defining loader has no name then <qualified-class-name> @<id>
3928 // If built-in loader, then omit '@<id>' as there is only one instance.
3929 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
3930 oop java_lang_ClassLoader::nameAndId(oop loader) {
3931 assert(is_instance(loader), "loader must be oop");
3932 return loader->obj_field(nameAndId_offset);
3933 }
3934
3935 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3936 assert(is_instance(loader), "loader must be oop");
3937 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3938 oop acl = loader;
3939 debug_only(jint loop_count = 0);
3940 // This loop taken verbatim from ClassLoader.java:
3941 do {
3942 acl = parent(acl);
3943 if (oopDesc::equals(cl, acl)) {
3944 return true;
3945 }
3946 assert(++loop_count > 0, "loop_count overflow");
3947 } while (acl != NULL);
3948 return false;
3949 }
3950
3951 bool java_lang_ClassLoader::is_instance(oop obj) {
3952 return obj != NULL && is_subclass(obj->klass());
3953 }
3954
3955
3956 // For class loader classes, parallelCapable defined
3957 // based on non-null field
3958 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3959 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3960 if (parallelCapable_offset == -1) {
3961 // Default for backward compatibility is false
3962 return false;
3963 }
3964 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3965 }
3966
3967 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3968 // Fix for 4474172; see evaluation for more details
3969 loader = non_reflection_class_loader(loader);
3970
3971 oop cl = SystemDictionary::java_system_loader();
3972 while(cl != NULL) {
3973 if (oopDesc::equals(cl, loader)) return true;
3974 cl = parent(cl);
3975 }
3976 return false;
3977 }
3978
3979 // Return true if this is one of the class loaders associated with
3980 // the generated bytecodes for reflection.
3981 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3982 if (loader != NULL) {
3983 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3984 // This might be null in non-1.4 JDKs
3985 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3986 }
3987 return false;
3988 }
3989
3990 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3991 // See whether this is one of the class loaders associated with
3992 // the generated bytecodes for reflection, and if so, "magically"
3993 // delegate to its parent to prevent class loading from occurring
3994 // in places where applications using reflection didn't expect it.
3995 if (is_reflection_class_loader(loader)) {
3996 return parent(loader);
3997 }
3998 return loader;
3999 }
4000
4001 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4002 assert(is_instance(loader), "loader must be oop");
4003 return loader->obj_field(unnamedModule_offset);
4004 }
4005
4006 // Support for java_lang_System
4007 //
4008 #define SYSTEM_FIELDS_DO(macro) \
4009 macro(static_in_offset, k, "in", input_stream_signature, true); \
4010 macro(static_out_offset, k, "out", print_stream_signature, true); \
4011 macro(static_err_offset, k, "err", print_stream_signature, true); \
4012 macro(static_security_offset, k, "security", security_manager_signature, true)
4013
4014 void java_lang_System::compute_offsets() {
4015 InstanceKlass* k = SystemDictionary::System_klass();
4016 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4017 }
4018
4019 #if INCLUDE_CDS
4020 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4021 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4022 }
4023 #endif
4024
4025 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4026 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4027 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4028
4029 // Support for jdk_internal_misc_UnsafeConstants
4030 //
4031 class UnsafeConstantsFixup : public FieldClosure {
4032 private:
4033 int _address_size;
4034 int _page_size;
4035 bool _big_endian;
4036 bool _use_unaligned_access;
4037 public:
4038 UnsafeConstantsFixup() {
4039 // round up values for all static final fields
4040 _address_size = sizeof(void*);
4041 _page_size = os::vm_page_size();
4042 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4043 _use_unaligned_access = UseUnalignedAccesses;
4044 }
4045
4046 void do_field(fieldDescriptor* fd) {
4047 oop mirror = fd->field_holder()->java_mirror();
4048 assert(mirror != NULL, "UnsafeConstants must have mirror already");
4049 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4050 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4051 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4052 if (fd->name() == vmSymbols::address_size_name()) {
4053 mirror->int_field_put(fd->offset(), _address_size);
4054 } else if (fd->name() == vmSymbols::page_size_name()) {
4055 mirror->int_field_put(fd->offset(), _page_size);
4056 } else if (fd->name() == vmSymbols::big_endian_name()) {
4057 mirror->bool_field_put(fd->offset(), _big_endian);
4058 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4059 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4060 } else {
4061 assert(false, "unexpected UnsafeConstants field");
4062 }
4063 }
4064 };
4065
4066 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4067 UnsafeConstantsFixup fixup;
4068 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4069 }
4070
4071 int java_lang_Class::_klass_offset;
4072 int java_lang_Class::_array_klass_offset;
4073 int java_lang_Class::_oop_size_offset;
4074 int java_lang_Class::_static_oop_field_count_offset;
4075 int java_lang_Class::_class_loader_offset;
4076 int java_lang_Class::_module_offset;
4077 int java_lang_Class::_protection_domain_offset;
4078 int java_lang_Class::_component_mirror_offset;
4079 int java_lang_Class::_init_lock_offset;
4080 int java_lang_Class::_signers_offset;
4081 int java_lang_Class::_name_offset;
4082 int java_lang_Class::_source_file_offset;
4083 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4084 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4085 int java_lang_Throwable::backtrace_offset;
4086 int java_lang_Throwable::detailMessage_offset;
4087 int java_lang_Throwable::stackTrace_offset;
4088 int java_lang_Throwable::depth_offset;
4089 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4090 int java_lang_reflect_AccessibleObject::override_offset;
4091 int java_lang_reflect_Method::clazz_offset;
4092 int java_lang_reflect_Method::name_offset;
4093 int java_lang_reflect_Method::returnType_offset;
4094 int java_lang_reflect_Method::parameterTypes_offset;
4095 int java_lang_reflect_Method::exceptionTypes_offset;
4096 int java_lang_reflect_Method::slot_offset;
4097 int java_lang_reflect_Method::modifiers_offset;
4098 int java_lang_reflect_Method::signature_offset;
4099 int java_lang_reflect_Method::annotations_offset;
4100 int java_lang_reflect_Method::parameter_annotations_offset;
4101 int java_lang_reflect_Method::annotation_default_offset;
4102 int java_lang_reflect_Constructor::clazz_offset;
4103 int java_lang_reflect_Constructor::parameterTypes_offset;
4104 int java_lang_reflect_Constructor::exceptionTypes_offset;
4105 int java_lang_reflect_Constructor::slot_offset;
4106 int java_lang_reflect_Constructor::modifiers_offset;
4107 int java_lang_reflect_Constructor::signature_offset;
4108 int java_lang_reflect_Constructor::annotations_offset;
4109 int java_lang_reflect_Constructor::parameter_annotations_offset;
4110 int java_lang_reflect_Field::clazz_offset;
4111 int java_lang_reflect_Field::name_offset;
4112 int java_lang_reflect_Field::type_offset;
4113 int java_lang_reflect_Field::slot_offset;
4114 int java_lang_reflect_Field::modifiers_offset;
4115 int java_lang_reflect_Field::signature_offset;
4116 int java_lang_reflect_Field::annotations_offset;
4117 int java_lang_reflect_Parameter::name_offset;
4118 int java_lang_reflect_Parameter::modifiers_offset;
4119 int java_lang_reflect_Parameter::index_offset;
4120 int java_lang_reflect_Parameter::executable_offset;
4121 int java_lang_boxing_object::value_offset;
4122 int java_lang_boxing_object::long_value_offset;
4123 int java_lang_ref_Reference::referent_offset;
4124 int java_lang_ref_Reference::queue_offset;
4125 int java_lang_ref_Reference::next_offset;
4126 int java_lang_ref_Reference::discovered_offset;
4127 int java_lang_ref_SoftReference::timestamp_offset;
4128 int java_lang_ref_SoftReference::static_clock_offset;
4129 int java_lang_ClassLoader::parent_offset;
4130 int java_lang_System::static_in_offset;
4131 int java_lang_System::static_out_offset;
4132 int java_lang_System::static_err_offset;
4133 int java_lang_System::static_security_offset;
4134 int java_lang_StackTraceElement::methodName_offset;
4135 int java_lang_StackTraceElement::fileName_offset;
4136 int java_lang_StackTraceElement::lineNumber_offset;
4137 int java_lang_StackTraceElement::moduleName_offset;
4138 int java_lang_StackTraceElement::moduleVersion_offset;
4139 int java_lang_StackTraceElement::classLoaderName_offset;
4140 int java_lang_StackTraceElement::declaringClass_offset;
4141 int java_lang_StackTraceElement::declaringClassObject_offset;
4142 int java_lang_StackFrameInfo::_memberName_offset;
4143 int java_lang_StackFrameInfo::_bci_offset;
4144 int java_lang_StackFrameInfo::_version_offset;
4145 int java_lang_LiveStackFrameInfo::_monitors_offset;
4146 int java_lang_LiveStackFrameInfo::_locals_offset;
4147 int java_lang_LiveStackFrameInfo::_operands_offset;
4148 int java_lang_LiveStackFrameInfo::_mode_offset;
4149 int java_lang_AssertionStatusDirectives::classes_offset;
4150 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4151 int java_lang_AssertionStatusDirectives::packages_offset;
4152 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4153 int java_lang_AssertionStatusDirectives::deflt_offset;
4154 int java_nio_Buffer::_limit_offset;
4155 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4156 int reflect_ConstantPool::_oop_offset;
4157 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4158 int java_lang_Integer_IntegerCache::_static_cache_offset;
4159 int java_lang_Long_LongCache::_static_cache_offset;
4160 int java_lang_Character_CharacterCache::_static_cache_offset;
4161 int java_lang_Short_ShortCache::_static_cache_offset;
4162 int java_lang_Byte_ByteCache::_static_cache_offset;
4163 int java_lang_Boolean::_static_TRUE_offset;
4164 int java_lang_Boolean::_static_FALSE_offset;
4165
4166
4167
4168 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4169 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4170 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4171 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4172 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4173 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4174 macro(methodName_offset, k, "methodName", string_signature, false); \
4175 macro(fileName_offset, k, "fileName", string_signature, false); \
4176 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4177
4178 // Support for java_lang_StackTraceElement
4179 void java_lang_StackTraceElement::compute_offsets() {
4180 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4181 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4182 }
4183
4184 #if INCLUDE_CDS
4185 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4186 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4187 }
4188 #endif
4189
4190 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4191 element->obj_field_put(fileName_offset, value);
4192 }
4193
4194 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4195 element->obj_field_put(declaringClass_offset, value);
4196 }
4197
4198 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4199 element->obj_field_put(methodName_offset, value);
4200 }
4201
4202 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4203 element->int_field_put(lineNumber_offset, value);
4204 }
4205
4206 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4207 element->obj_field_put(moduleName_offset, value);
4208 }
4209
4210 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4211 element->obj_field_put(moduleVersion_offset, value);
4212 }
4213
4214 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4215 element->obj_field_put(classLoaderName_offset, value);
4216 }
4217
4218 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4219 element->obj_field_put(declaringClassObject_offset, value);
4220 }
4221
4222 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4223 element->short_field_put(_version_offset, value);
4224 }
4225
4226 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4227 element->int_field_put(_bci_offset, value);
4228 }
4229
4230 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4231 element->obj_field_put(_monitors_offset, value);
4232 }
4233
4234 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4235 element->obj_field_put(_locals_offset, value);
4236 }
4237
4238 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4239 element->obj_field_put(_operands_offset, value);
4240 }
4241
4242 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4243 element->int_field_put(_mode_offset, value);
4244 }
4245
4246 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4247 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4248 macro(classes_offset, k, "classes", string_array_signature, false); \
4249 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4250 macro(packages_offset, k, "packages", string_array_signature, false); \
4251 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4252 macro(deflt_offset, k, "deflt", bool_signature, false)
4253
4254 void java_lang_AssertionStatusDirectives::compute_offsets() {
4255 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4256 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4257 }
4258
4259 #if INCLUDE_CDS
4260 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4261 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4262 }
4263 #endif
4264
4265 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4266 o->obj_field_put(classes_offset, val);
4267 }
4268
4269 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4270 o->obj_field_put(classEnabled_offset, val);
4271 }
4272
4273 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4274 o->obj_field_put(packages_offset, val);
4275 }
4276
4277 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4278 o->obj_field_put(packageEnabled_offset, val);
4279 }
4280
4281 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4282 o->bool_field_put(deflt_offset, val);
4283 }
4284
4285
4286 // Support for intrinsification of java.nio.Buffer.checkIndex
4287 int java_nio_Buffer::limit_offset() {
4288 return _limit_offset;
4289 }
4290
4291 #define BUFFER_FIELDS_DO(macro) \
4292 macro(_limit_offset, k, "limit", int_signature, false)
4293
4294 void java_nio_Buffer::compute_offsets() {
4295 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4296 assert(k != NULL, "must be loaded in 1.4+");
4297 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4298 }
4299
4300 #if INCLUDE_CDS
4301 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4302 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4303 }
4304 #endif
4305
4306 #define AOS_FIELDS_DO(macro) \
4307 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4308
4309 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4310 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4311 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4312 }
4313
4314 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4315 assert(_owner_offset != 0, "Must be initialized");
4316 return obj->obj_field(_owner_offset);
4317 }
4318
4319 #if INCLUDE_CDS
4320 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4321 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4322 }
4323 #endif
4324
4325 #define INTEGER_CACHE_FIELDS_DO(macro) \
4326 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4327
4328 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4329 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4330 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4331 }
4332
4333 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4334 oop base = ik->static_field_base_raw();
4335 return objArrayOop(base->obj_field(_static_cache_offset));
4336 }
4337
4338 Symbol* java_lang_Integer_IntegerCache::symbol() {
4339 return vmSymbols::java_lang_Integer_IntegerCache();
4340 }
4341
4342 #if INCLUDE_CDS
4343 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
4344 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4345 }
4346 #endif
4347 #undef INTEGER_CACHE_FIELDS_DO
4348
4349 jint java_lang_Integer::value(oop obj) {
4350 jvalue v;
4351 java_lang_boxing_object::get_value(obj, &v);
4352 return v.i;
4353 }
4354
4355 #define LONG_CACHE_FIELDS_DO(macro) \
4356 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
4357
4358 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
4359 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4360 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4361 }
4362
4363 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
4364 oop base = ik->static_field_base_raw();
4365 return objArrayOop(base->obj_field(_static_cache_offset));
4366 }
4367
4368 Symbol* java_lang_Long_LongCache::symbol() {
4369 return vmSymbols::java_lang_Long_LongCache();
4370 }
4371
4372 #if INCLUDE_CDS
4373 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
4374 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4375 }
4376 #endif
4377 #undef LONG_CACHE_FIELDS_DO
4378
4379 jlong java_lang_Long::value(oop obj) {
4380 jvalue v;
4381 java_lang_boxing_object::get_value(obj, &v);
4382 return v.j;
4383 }
4384
4385 #define CHARACTER_CACHE_FIELDS_DO(macro) \
4386 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
4387
4388 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
4389 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4390 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4391 }
4392
4393 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
4394 oop base = ik->static_field_base_raw();
4395 return objArrayOop(base->obj_field(_static_cache_offset));
4396 }
4397
4398 Symbol* java_lang_Character_CharacterCache::symbol() {
4399 return vmSymbols::java_lang_Character_CharacterCache();
4400 }
4401
4402 #if INCLUDE_CDS
4403 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
4404 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4405 }
4406 #endif
4407 #undef CHARACTER_CACHE_FIELDS_DO
4408
4409 jchar java_lang_Character::value(oop obj) {
4410 jvalue v;
4411 java_lang_boxing_object::get_value(obj, &v);
4412 return v.c;
4413 }
4414
4415 #define SHORT_CACHE_FIELDS_DO(macro) \
4416 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
4417
4418 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
4419 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4420 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4421 }
4422
4423 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
4424 oop base = ik->static_field_base_raw();
4425 return objArrayOop(base->obj_field(_static_cache_offset));
4426 }
4427
4428 Symbol* java_lang_Short_ShortCache::symbol() {
4429 return vmSymbols::java_lang_Short_ShortCache();
4430 }
4431
4432 #if INCLUDE_CDS
4433 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
4434 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4435 }
4436 #endif
4437 #undef SHORT_CACHE_FIELDS_DO
4438
4439 jshort java_lang_Short::value(oop obj) {
4440 jvalue v;
4441 java_lang_boxing_object::get_value(obj, &v);
4442 return v.s;
4443 }
4444
4445 #define BYTE_CACHE_FIELDS_DO(macro) \
4446 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
4447
4448 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
4449 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4450 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4451 }
4452
4453 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
4454 oop base = ik->static_field_base_raw();
4455 return objArrayOop(base->obj_field(_static_cache_offset));
4456 }
4457
4458 Symbol* java_lang_Byte_ByteCache::symbol() {
4459 return vmSymbols::java_lang_Byte_ByteCache();
4460 }
4461
4462 #if INCLUDE_CDS
4463 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
4464 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4465 }
4466 #endif
4467 #undef BYTE_CACHE_FIELDS_DO
4468
4469 jbyte java_lang_Byte::value(oop obj) {
4470 jvalue v;
4471 java_lang_boxing_object::get_value(obj, &v);
4472 return v.b;
4473 }
4474 #define BOOLEAN_FIELDS_DO(macro) \
4475 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
4476 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
4477
4478
4479 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
4480 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4481 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4482 }
4483
4484 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
4485 oop base = ik->static_field_base_raw();
4486 return base->obj_field(_static_TRUE_offset);
4487 }
4488
4489 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
4490 oop base = ik->static_field_base_raw();
4491 return base->obj_field(_static_FALSE_offset);
4492 }
4493
4494 Symbol* java_lang_Boolean::symbol() {
4495 return vmSymbols::java_lang_Boolean();
4496 }
4497
4498 #if INCLUDE_CDS
4499 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
4500 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4501 }
4502 #endif
4503 #undef BOOLEAN_CACHE_FIELDS_DO
4504
4505 jboolean java_lang_Boolean::value(oop obj) {
4506 jvalue v;
4507 java_lang_boxing_object::get_value(obj, &v);
4508 return v.z;
4509 }
4510
4511 static int member_offset(int hardcoded_offset) {
4512 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4513 }
4514
4515 // Compute hard-coded offsets
4516 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4517 // are not available to determine the offset_of_static_fields.
4518 void JavaClasses::compute_hard_coded_offsets() {
4519
4520 // java_lang_boxing_object
4521 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4522 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4523
4524 // java_lang_ref_Reference
4525 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4526 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4527 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4528 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4529 }
4530
4531 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4532
4533 // Compute non-hard-coded field offsets of all the classes in this file
4534 void JavaClasses::compute_offsets() {
4535 if (UseSharedSpaces) {
4536 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4537 JvmtiExport::has_early_class_hook_env()),
4538 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4539 // None of the classes used by the rest of this function can be replaced by
4540 // JMVTI ClassFileLoadHook.
4541 // We are safe to use the archived offsets, which have already been restored
4542 // by JavaClasses::serialize_offsets, without computing the offsets again.
4543 return;
4544 }
4545
4546 // We have already called the compute_offsets() of the
4547 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4548 // earlier inside SystemDictionary::resolve_well_known_classes()
4549 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4550 }
4551
4552 #if INCLUDE_CDS
4553 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4554
4555 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4556 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4557 }
4558 #endif
4559
4560
4561 #ifndef PRODUCT
4562
4563 // These functions exist to assert the validity of hard-coded field offsets to guard
4564 // against changes in the class files
4565
4566 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4567 EXCEPTION_MARK;
4568 fieldDescriptor fd;
4569 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
4570 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4571 InstanceKlass* ik = InstanceKlass::cast(k);
4572 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
4573 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
4574 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4575 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4576 return false;
4577 }
4578 if (fd.is_static()) {
4579 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4580 return false;
4581 }
4582 if (fd.offset() == hardcoded_offset ) {
4583 return true;
4584 } else {
4585 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4586 klass_name, field_name, hardcoded_offset, fd.offset());
4587 return false;
4588 }
4589 }
4590
4591 // Check the hard-coded field offsets of all the classes in this file
4592
4593 void JavaClasses::check_offsets() {
4594 bool valid = true;
4595
4596 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4597 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4598
4599 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4600 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4601
4602 // Boxed primitive objects (java_lang_boxing_object)
4603
4604 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4605 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4606 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4607 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4608 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4609 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4610 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4611 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4612
4613 // java.lang.ref.Reference
4614
4615 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4616 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4617 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4618 // Fake field
4619 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4620
4621 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4622 }
4623
4624 #endif // PRODUCT
4625
4626 int InjectedField::compute_offset() {
4627 InstanceKlass* ik = InstanceKlass::cast(klass());
4628 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4629 if (!may_be_java && !fs.access_flags().is_internal()) {
4630 // Only look at injected fields
4631 continue;
4632 }
4633 if (fs.name() == name() && fs.signature() == signature()) {
4634 return fs.offset();
4635 }
4636 }
4637 ResourceMark rm;
4638 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)" : "");
4639 #ifndef PRODUCT
4640 ik->print();
4641 tty->print_cr("all fields:");
4642 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4643 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4644 }
4645 #endif //PRODUCT
4646 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4647 return -1;
4648 }
4649
4650 void javaClasses_init() {
4651 JavaClasses::compute_offsets();
4652 JavaClasses::check_offsets();
4653 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4654 }