1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/classLoaderData.inline.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/vmSymbols.hpp"
33 #include "code/debugInfo.hpp"
34 #include "code/dependencyContext.hpp"
35 #include "code/pcDesc.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/heapShared.inline.hpp"
41 #include "memory/metaspaceShared.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/fieldStreams.hpp"
46 #include "oops/instanceKlass.hpp"
47 #include "oops/instanceMirrorKlass.hpp"
48 #include "oops/klass.hpp"
49 #include "oops/method.inline.hpp"
50 #include "oops/objArrayOop.inline.hpp"
51 #include "oops/oop.inline.hpp"
52 #include "oops/symbol.hpp"
53 #include "oops/typeArrayOop.inline.hpp"
54 #include "oops/valueArrayKlass.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "prims/resolvedMethodTable.hpp"
57 #include "runtime/fieldDescriptor.inline.hpp"
58 #include "runtime/frame.inline.hpp"
59 #include "runtime/handles.inline.hpp"
60 #include "runtime/interfaceSupport.inline.hpp"
61 #include "runtime/java.hpp"
62 #include "runtime/javaCalls.hpp"
63 #include "runtime/jniHandles.inline.hpp"
64 #include "runtime/safepoint.hpp"
65 #include "runtime/safepointVerifiers.hpp"
66 #include "runtime/thread.inline.hpp"
67 #include "runtime/vframe.inline.hpp"
68 #include "utilities/align.hpp"
69 #include "utilities/preserveException.hpp"
70 #include "utilities/utf8.hpp"
71 #if INCLUDE_JVMCI
72 #include "jvmci/jvmciJavaClasses.hpp"
73 #endif
74
75 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
76 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
77
78 #if INCLUDE_CDS
79 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
80 f->do_u4((u4*)&_##name##_offset);
81 #endif
82
83 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
84 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
85
86 InjectedField JavaClasses::_injected_fields[] = {
87 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
88 };
89
90 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
91 return _injected_fields[id].compute_offset();
92 }
93
94 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
95 *field_count = 0;
96
97 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
98 if (sid == vmSymbols::NO_SID) {
99 // Only well known classes can inject fields
100 return NULL;
101 }
102
103 int count = 0;
104 int start = -1;
105
106 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
107 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
108 count++; \
109 if (start == -1) start = klass##_##name##_enum; \
110 }
111 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
112 #undef LOOKUP_INJECTED_FIELD
113
114 if (start != -1) {
115 *field_count = count;
116 return _injected_fields + start;
117 }
118 return NULL;
119 }
120
121
122 // Helpful routine for computing field offsets at run time rather than hardcoding them
123 // Finds local fields only, including static fields. Static field offsets are from the
124 // beginning of the mirror.
125 static void compute_offset(int &dest_offset,
126 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
127 bool is_static = false) {
128 fieldDescriptor fd;
129 if (ik == NULL) {
130 ResourceMark rm;
131 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
132 vm_exit_during_initialization("Invalid layout of well-known class");
133 }
134
135 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
136 ResourceMark rm;
137 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
138 name_symbol->as_C_string(), signature_symbol->as_C_string());
139 #ifndef PRODUCT
140 // Prints all fields and offsets
141 Log(class) lt;
142 LogStream ls(lt.error());
143 ik->print_on(&ls);
144 #endif //PRODUCT
145 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
146 }
147 dest_offset = fd.offset();
148 }
149
150 // Overloading to pass name as a string.
151 static void compute_offset(int& dest_offset, InstanceKlass* ik,
152 const char* name_string, Symbol* signature_symbol,
153 bool is_static = false) {
154 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
155 if (name == NULL) {
156 ResourceMark rm;
157 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
158 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
159 }
160 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
161 }
162
163 int java_lang_String::value_offset = 0;
164 int java_lang_String::hash_offset = 0;
165 int java_lang_String::hashIsZero_offset = 0;
166 int java_lang_String::coder_offset = 0;
167
168 bool java_lang_String::initialized = false;
169
170 bool java_lang_String::is_instance(oop obj) {
171 return is_instance_inlined(obj);
172 }
173
174 #if INCLUDE_CDS
175 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
176 f->do_u4((u4*)&offset)
177 #endif
178
179 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
180 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
181
182 #define STRING_FIELDS_DO(macro) \
183 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
184 macro(hash_offset, k, "hash", int_signature, false); \
185 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
186 macro(coder_offset, k, "coder", byte_signature, false);
187
188 void java_lang_String::compute_offsets() {
189 if (initialized) {
190 return;
191 }
192
193 InstanceKlass* k = SystemDictionary::String_klass();
194 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
195
196 initialized = true;
197 }
198
199 #if INCLUDE_CDS
200 void java_lang_String::serialize_offsets(SerializeClosure* f) {
201 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
202 f->do_bool(&initialized);
203 }
204 #endif
205
206 class CompactStringsFixup : public FieldClosure {
207 private:
208 bool _value;
209
210 public:
211 CompactStringsFixup(bool value) : _value(value) {}
212
213 void do_field(fieldDescriptor* fd) {
214 if (fd->name() == vmSymbols::compact_strings_name()) {
215 oop mirror = fd->field_holder()->java_mirror();
216 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
217 assert(mirror != NULL, "String must have mirror already");
218 mirror->bool_field_put(fd->offset(), _value);
219 }
220 }
221 };
222
223 void java_lang_String::set_compact_strings(bool value) {
224 CompactStringsFixup fix(value);
225 SystemDictionary::String_klass()->do_local_static_fields(&fix);
226 }
227
228 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
229 assert(initialized, "Must be initialized");
230 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
231
232 // Create the String object first, so there's a chance that the String
233 // and the char array it points to end up in the same cache line.
234 oop obj;
235 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
236
237 // Create the char array. The String object must be handlized here
238 // because GC can happen as a result of the allocation attempt.
239 Handle h_obj(THREAD, obj);
240 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
241 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
242
243 // Point the String at the char array
244 obj = h_obj();
245 set_value(obj, buffer);
246 // No need to zero the offset, allocation zero'ed the entire String object
247 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
248 return h_obj;
249 }
250
251 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
252 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
253 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
254 typeArrayOop buffer = value(h_obj());
255 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
256 if (is_latin1) {
257 for (int index = 0; index < length; index++) {
258 buffer->byte_at_put(index, (jbyte)unicode[index]);
259 }
260 } else {
261 for (int index = 0; index < length; index++) {
262 buffer->char_at_put(index, unicode[index]);
263 }
264 }
265
266 #ifdef ASSERT
267 {
268 ResourceMark rm;
269 char* expected = UNICODE::as_utf8(unicode, length);
270 char* actual = as_utf8_string(h_obj());
271 if (strcmp(expected, actual) != 0) {
272 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
273 ShouldNotReachHere();
274 }
275 }
276 #endif
277
278 return h_obj;
279 }
280
281 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
282 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
283 return h_obj();
284 }
285
286 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
287 if (utf8_str == NULL) {
288 return Handle();
289 }
290 bool has_multibyte, is_latin1;
291 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
292 if (!CompactStrings) {
293 has_multibyte = true;
294 is_latin1 = false;
295 }
296
297 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
298 if (length > 0) {
299 if (!has_multibyte) {
300 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
301 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
302 } else if (is_latin1) {
303 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
304 } else {
305 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
306 }
307 }
308
309 #ifdef ASSERT
310 // This check is too strict because the input string is not necessarily valid UTF8.
311 // For example, it may be created with arbitrary content via jni_NewStringUTF.
312 /*
313 {
314 ResourceMark rm;
315 const char* expected = utf8_str;
316 char* actual = as_utf8_string(h_obj());
317 if (strcmp(expected, actual) != 0) {
318 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
319 ShouldNotReachHere();
320 }
321 }
322 */
323 #endif
324
325 return h_obj;
326 }
327
328 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
329 Handle h_obj = create_from_str(utf8_str, CHECK_0);
330 return h_obj();
331 }
332
333 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
334 const char* utf8_str = (char*)symbol->bytes();
335 int utf8_len = symbol->utf8_length();
336
337 bool has_multibyte, is_latin1;
338 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
339 if (!CompactStrings) {
340 has_multibyte = true;
341 is_latin1 = false;
342 }
343
344 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
345 if (length > 0) {
346 if (!has_multibyte) {
347 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
348 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
349 } else if (is_latin1) {
350 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
351 } else {
352 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
353 }
354 }
355
356 #ifdef ASSERT
357 {
358 ResourceMark rm;
359 const char* expected = symbol->as_utf8();
360 char* actual = as_utf8_string(h_obj());
361 if (strncmp(expected, actual, utf8_len) != 0) {
362 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
363 ShouldNotReachHere();
364 }
365 }
366 #endif
367
368 return h_obj;
369 }
370
371 // Converts a C string to a Java String based on current encoding
372 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
373 assert(str != NULL, "bad arguments");
374
375 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
376 static to_java_string_fn_t _to_java_string_fn = NULL;
377
378 if (_to_java_string_fn == NULL) {
379 void *lib_handle = os::native_java_library();
380 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
381 if (_to_java_string_fn == NULL) {
382 fatal("NewStringPlatform missing");
383 }
384 }
385
386 jstring js = NULL;
387 { JavaThread* thread = (JavaThread*)THREAD;
388 assert(thread->is_Java_thread(), "must be java thread");
389 HandleMark hm(thread);
390 ThreadToNativeFromVM ttn(thread);
391 js = (_to_java_string_fn)(thread->jni_environment(), str);
392 }
393 return Handle(THREAD, JNIHandles::resolve(js));
394 }
395
396 // Converts a Java String to a native C string that can be used for
397 // native OS calls.
398 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
399 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
400 static to_platform_string_fn_t _to_platform_string_fn = NULL;
401
402 if (_to_platform_string_fn == NULL) {
403 void *lib_handle = os::native_java_library();
404 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
405 if (_to_platform_string_fn == NULL) {
406 fatal("GetStringPlatformChars missing");
407 }
408 }
409
410 char *native_platform_string;
411 { JavaThread* thread = (JavaThread*)THREAD;
412 assert(thread->is_Java_thread(), "must be java thread");
413 JNIEnv *env = thread->jni_environment();
414 jstring js = (jstring) JNIHandles::make_local(env, java_string());
415 bool is_copy;
416 HandleMark hm(thread);
417 ThreadToNativeFromVM ttn(thread);
418 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
419 assert(is_copy == JNI_TRUE, "is_copy value changed");
420 JNIHandles::destroy_local(js);
421 }
422 return native_platform_string;
423 }
424
425 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
426 oop obj = java_string();
427 // Typical usage is to convert all '/' to '.' in string.
428 typeArrayOop value = java_lang_String::value(obj);
429 int length = java_lang_String::length(obj, value);
430 bool is_latin1 = java_lang_String::is_latin1(obj);
431
432 // First check if any from_char exist
433 int index; // Declared outside, used later
434 for (index = 0; index < length; index++) {
435 jchar c = !is_latin1 ? value->char_at(index) :
436 ((jchar) value->byte_at(index)) & 0xff;
437 if (c == from_char) {
438 break;
439 }
440 }
441 if (index == length) {
442 // No from_char, so do not copy.
443 return java_string;
444 }
445
446 // Check if result string will be latin1
447 bool to_is_latin1 = false;
448
449 // Replacement char must be latin1
450 if (CompactStrings && UNICODE::is_latin1(to_char)) {
451 if (is_latin1) {
452 // Source string is latin1 as well
453 to_is_latin1 = true;
454 } else if (!UNICODE::is_latin1(from_char)) {
455 // We are replacing an UTF16 char. Scan string to
456 // check if result can be latin1 encoded.
457 to_is_latin1 = true;
458 for (index = 0; index < length; index++) {
459 jchar c = value->char_at(index);
460 if (c != from_char && !UNICODE::is_latin1(c)) {
461 to_is_latin1 = false;
462 break;
463 }
464 }
465 }
466 }
467
468 // Create new UNICODE (or byte) buffer. Must handlize value because GC
469 // may happen during String and char array creation.
470 typeArrayHandle h_value(THREAD, value);
471 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
472 typeArrayOop from_buffer = h_value();
473 typeArrayOop to_buffer = java_lang_String::value(string());
474
475 // Copy contents
476 for (index = 0; index < length; index++) {
477 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
478 ((jchar) from_buffer->byte_at(index)) & 0xff;
479 if (c == from_char) {
480 c = to_char;
481 }
482 if (!to_is_latin1) {
483 to_buffer->char_at_put(index, c);
484 } else {
485 to_buffer->byte_at_put(index, (jbyte) c);
486 }
487 }
488 return string;
489 }
490
491 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
492 typeArrayOop value = java_lang_String::value(java_string);
493 length = java_lang_String::length(java_string, value);
494 bool is_latin1 = java_lang_String::is_latin1(java_string);
495
496 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
497 if (result != NULL) {
498 if (!is_latin1) {
499 for (int index = 0; index < length; index++) {
500 result[index] = value->char_at(index);
501 }
502 } else {
503 for (int index = 0; index < length; index++) {
504 result[index] = ((jchar) value->byte_at(index)) & 0xff;
505 }
506 }
507 } else {
508 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
509 }
510 return result;
511 }
512
513 unsigned int java_lang_String::hash_code(oop java_string) {
514 // The hash and hashIsZero fields are subject to a benign data race,
515 // making it crucial to ensure that any observable result of the
516 // calculation in this method stays correct under any possible read of
517 // these fields. Necessary restrictions to allow this to be correct
518 // without explicit memory fences or similar concurrency primitives is
519 // that we can ever only write to one of these two fields for a given
520 // String instance, and that the computation is idempotent and derived
521 // from immutable state
522 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized");
523 if (java_lang_String::hash_is_set(java_string)) {
524 return java_string->int_field(hash_offset);
525 }
526
527 typeArrayOop value = java_lang_String::value(java_string);
528 int length = java_lang_String::length(java_string, value);
529 bool is_latin1 = java_lang_String::is_latin1(java_string);
530
531 unsigned int hash = 0;
532 if (length > 0) {
533 if (is_latin1) {
534 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
535 } else {
536 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
537 }
538 }
539
540 if (hash != 0) {
541 java_string->int_field_put(hash_offset, hash);
542 } else {
543 java_string->bool_field_put(hashIsZero_offset, true);
544 }
545 return hash;
546 }
547
548 char* java_lang_String::as_quoted_ascii(oop java_string) {
549 typeArrayOop value = java_lang_String::value(java_string);
550 int length = java_lang_String::length(java_string, value);
551 bool is_latin1 = java_lang_String::is_latin1(java_string);
552
553 if (length == 0) return NULL;
554
555 char* result;
556 int result_length;
557 if (!is_latin1) {
558 jchar* base = value->char_at_addr(0);
559 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
560 result = NEW_RESOURCE_ARRAY(char, result_length);
561 UNICODE::as_quoted_ascii(base, length, result, result_length);
562 } else {
563 jbyte* base = value->byte_at_addr(0);
564 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
565 result = NEW_RESOURCE_ARRAY(char, result_length);
566 UNICODE::as_quoted_ascii(base, length, result, result_length);
567 }
568 assert(result_length >= length + 1, "must not be shorter");
569 assert(result_length == (int)strlen(result) + 1, "must match");
570 return result;
571 }
572
573 Symbol* java_lang_String::as_symbol(oop java_string) {
574 typeArrayOop value = java_lang_String::value(java_string);
575 int length = java_lang_String::length(java_string, value);
576 bool is_latin1 = java_lang_String::is_latin1(java_string);
577 if (!is_latin1) {
578 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
579 Symbol* sym = SymbolTable::new_symbol(base, length);
580 return sym;
581 } else {
582 ResourceMark rm;
583 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
584 const char* base = UNICODE::as_utf8(position, length);
585 Symbol* sym = SymbolTable::new_symbol(base, length);
586 return sym;
587 }
588 }
589
590 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
591 typeArrayOop value = java_lang_String::value(java_string);
592 int length = java_lang_String::length(java_string, value);
593 bool is_latin1 = java_lang_String::is_latin1(java_string);
594 if (!is_latin1) {
595 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
596 return SymbolTable::probe_unicode(base, length);
597 } else {
598 ResourceMark rm;
599 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
600 const char* base = UNICODE::as_utf8(position, length);
601 return SymbolTable::probe(base, length);
602 }
603 }
604
605 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
606 assert(value_equals(value, java_lang_String::value(java_string)),
607 "value must be same as java_lang_String::value(java_string)");
608 int length = java_lang_String::length(java_string, value);
609 if (length == 0) {
610 return 0;
611 }
612 if (!java_lang_String::is_latin1(java_string)) {
613 return UNICODE::utf8_length(value->char_at_addr(0), length);
614 } else {
615 return UNICODE::utf8_length(value->byte_at_addr(0), length);
616 }
617 }
618
619 int java_lang_String::utf8_length(oop java_string) {
620 typeArrayOop value = java_lang_String::value(java_string);
621 return utf8_length(java_string, value);
622 }
623
624 char* java_lang_String::as_utf8_string(oop java_string) {
625 typeArrayOop value = java_lang_String::value(java_string);
626 int length = java_lang_String::length(java_string, value);
627 bool is_latin1 = java_lang_String::is_latin1(java_string);
628 if (!is_latin1) {
629 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
630 return UNICODE::as_utf8(position, length);
631 } else {
632 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
633 return UNICODE::as_utf8(position, length);
634 }
635 }
636
637 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
638 assert(value_equals(value, java_lang_String::value(java_string)),
639 "value must be same as java_lang_String::value(java_string)");
640 int length = java_lang_String::length(java_string, value);
641 bool is_latin1 = java_lang_String::is_latin1(java_string);
642 if (!is_latin1) {
643 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
644 return UNICODE::as_utf8(position, length, buf, buflen);
645 } else {
646 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
647 return UNICODE::as_utf8(position, length, buf, buflen);
648 }
649 }
650
651 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
652 typeArrayOop value = java_lang_String::value(java_string);
653 return as_utf8_string(java_string, value, buf, buflen);
654 }
655
656 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
657 typeArrayOop value = java_lang_String::value(java_string);
658 bool is_latin1 = java_lang_String::is_latin1(java_string);
659 assert(start + len <= java_lang_String::length(java_string), "just checking");
660 if (!is_latin1) {
661 jchar* position = value->char_at_addr(start);
662 return UNICODE::as_utf8(position, len);
663 } else {
664 jbyte* position = value->byte_at_addr(start);
665 return UNICODE::as_utf8(position, len);
666 }
667 }
668
669 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
670 assert(value_equals(value, java_lang_String::value(java_string)),
671 "value must be same as java_lang_String::value(java_string)");
672 assert(start + len <= java_lang_String::length(java_string), "just checking");
673 bool is_latin1 = java_lang_String::is_latin1(java_string);
674 if (!is_latin1) {
675 jchar* position = value->char_at_addr(start);
676 return UNICODE::as_utf8(position, len, buf, buflen);
677 } else {
678 jbyte* position = value->byte_at_addr(start);
679 return UNICODE::as_utf8(position, len, buf, buflen);
680 }
681 }
682
683 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
684 assert(java_string->klass() == SystemDictionary::String_klass(),
685 "must be java_string");
686 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
687 int length = java_lang_String::length(java_string, value);
688 if (length != len) {
689 return false;
690 }
691 bool is_latin1 = java_lang_String::is_latin1(java_string);
692 if (!is_latin1) {
693 for (int i = 0; i < len; i++) {
694 if (value->char_at(i) != chars[i]) {
695 return false;
696 }
697 }
698 } else {
699 for (int i = 0; i < len; i++) {
700 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
701 return false;
702 }
703 }
704 }
705 return true;
706 }
707
708 bool java_lang_String::equals(oop str1, oop str2) {
709 assert(str1->klass() == SystemDictionary::String_klass(),
710 "must be java String");
711 assert(str2->klass() == SystemDictionary::String_klass(),
712 "must be java String");
713 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
714 bool is_latin1 = java_lang_String::is_latin1(str1);
715 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
716 bool is_latin2 = java_lang_String::is_latin1(str2);
717
718 if (is_latin1 != is_latin2) {
719 // Strings with different coders are never equal.
720 return false;
721 }
722 return value_equals(value1, value2);
723 }
724
725 void java_lang_String::print(oop java_string, outputStream* st) {
726 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
727 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
728
729 if (value == NULL) {
730 // This can happen if, e.g., printing a String
731 // object before its initializer has been called
732 st->print("NULL");
733 return;
734 }
735
736 int length = java_lang_String::length(java_string, value);
737 bool is_latin1 = java_lang_String::is_latin1(java_string);
738
739 st->print("\"");
740 for (int index = 0; index < length; index++) {
741 st->print("%c", (!is_latin1) ? value->char_at(index) :
742 ((jchar) value->byte_at(index)) & 0xff );
743 }
744 st->print("\"");
745 }
746
747
748 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
749 assert(mirror.not_null() && fd->is_static(), "just checking");
750 if (fd->has_initial_value()) {
751 BasicType t = fd->field_type();
752 switch (t) {
753 case T_BYTE:
754 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
755 break;
756 case T_BOOLEAN:
757 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
758 break;
759 case T_CHAR:
760 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
761 break;
762 case T_SHORT:
763 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
764 break;
765 case T_INT:
766 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
767 break;
768 case T_FLOAT:
769 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
770 break;
771 case T_DOUBLE:
772 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
773 break;
774 case T_LONG:
775 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
776 break;
777 case T_OBJECT:
778 {
779 assert(fd->signature() == vmSymbols::string_signature(),
780 "just checking");
781 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
782 // Archive the String field and update the pointer.
783 oop s = mirror()->obj_field(fd->offset());
784 oop archived_s = StringTable::create_archived_string(s, CHECK);
785 mirror()->obj_field_put(fd->offset(), archived_s);
786 } else {
787 oop string = fd->string_initial_value(CHECK);
788 mirror()->obj_field_put(fd->offset(), string);
789 }
790 }
791 break;
792 default:
793 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
794 "Illegal ConstantValue attribute in class file");
795 }
796 }
797 }
798
799
800 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
801 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
802
803 // If the offset was read from the shared archive, it was fixed up already
804 if (!k->is_shared()) {
805 if (k->is_instance_klass()) {
806 // During bootstrap, java.lang.Class wasn't loaded so static field
807 // offsets were computed without the size added it. Go back and
808 // update all the static field offsets to included the size.
809 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
810 if (fs.access_flags().is_static()) {
811 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
812 fs.set_offset(real_offset);
813 }
814 }
815 }
816 }
817
818 if (k->is_shared() && k->has_raw_archived_mirror()) {
819 if (HeapShared::open_archive_heap_region_mapped()) {
820 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
821 assert(present, "Missing archived mirror for %s", k->external_name());
822 return;
823 } else {
824 k->set_java_mirror_handle(NULL);
825 k->clear_has_raw_archived_mirror();
826 }
827 }
828 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
829 }
830
831 void java_lang_Class::initialize_mirror_fields(Klass* k,
832 Handle mirror,
833 Handle protection_domain,
834 TRAPS) {
835 // Allocate a simple java object for a lock.
836 // This needs to be a java object because during class initialization
837 // it can be held across a java call.
838 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
839 set_init_lock(mirror(), r);
840
841 // Set protection domain also
842 set_protection_domain(mirror(), protection_domain());
843
844 // Initialize static fields
845 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
846 }
847
848 // Set the java.lang.Module module field in the java_lang_Class mirror
849 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
850 if (module.is_null()) {
851 // During startup, the module may be NULL only if java.base has not been defined yet.
852 // Put the class on the fixup_module_list to patch later when the java.lang.Module
853 // for java.base is known. But note that since we captured the NULL module another
854 // thread may have completed that initialization.
855
856 bool javabase_was_defined = false;
857 {
858 MutexLocker m1(Module_lock, THREAD);
859 // Keep list of classes needing java.base module fixup
860 if (!ModuleEntryTable::javabase_defined()) {
861 assert(k->java_mirror() != NULL, "Class's mirror is null");
862 k->class_loader_data()->inc_keep_alive();
863 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
864 fixup_module_field_list()->push(k);
865 } else {
866 javabase_was_defined = true;
867 }
868 }
869
870 // If java.base was already defined then patch this particular class with java.base.
871 if (javabase_was_defined) {
872 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
873 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
874 "Setting class module field, " JAVA_BASE_NAME " should be defined");
875 Handle javabase_handle(THREAD, javabase_entry->module());
876 set_module(mirror(), javabase_handle());
877 }
878 } else {
879 assert(Universe::is_module_initialized() ||
880 (ModuleEntryTable::javabase_defined() &&
881 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
882 "Incorrect java.lang.Module specification while creating mirror");
883 set_module(mirror(), module());
884 }
885 }
886
887 // Statically allocate fixup lists because they always get created.
888 void java_lang_Class::allocate_fixup_lists() {
889 GrowableArray<Klass*>* mirror_list =
890 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
891 set_fixup_mirror_list(mirror_list);
892
893 GrowableArray<Klass*>* module_list =
894 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
895 set_fixup_module_field_list(module_list);
896 }
897
898 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
899 Handle module, Handle protection_domain, TRAPS) {
900 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
901 assert(k->java_mirror() == NULL, "should only assign mirror once");
902
903 // Use this moment of initialization to cache modifier_flags also,
904 // to support Class.getModifiers(). Instance classes recalculate
905 // the cached flags after the class file is parsed, but before the
906 // class is put into the system dictionary.
907 int computed_modifiers = k->compute_modifier_flags(CHECK);
908 k->set_modifier_flags(computed_modifiers);
909 // Class_klass has to be loaded because it is used to allocate
910 // the mirror.
911 if (SystemDictionary::Class_klass_loaded()) {
912 // Allocate mirror (java.lang.Class instance)
913 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
914 Handle mirror(THREAD, mirror_oop);
915 Handle comp_mirror;
916
917 // Setup indirection from mirror->klass
918 java_lang_Class::set_klass(mirror(), k);
919
920 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
921 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
922
923 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
924
925 // It might also have a component mirror. This mirror must already exist.
926 if (k->is_array_klass()) {
927 if (k->is_valueArray_klass()) {
928 Klass* element_klass = (Klass*) ValueArrayKlass::cast(k)->element_klass();
929 assert(element_klass->is_value(), "Must be value type component");
930 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(element_klass));
931 comp_mirror = Handle(THREAD, vk->value_mirror());
932 } else if (k->is_typeArray_klass()) {
933 BasicType type = TypeArrayKlass::cast(k)->element_type();
934 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
935 } else {
936 assert(k->is_objArray_klass(), "Must be");
937 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
938 assert(element_klass != NULL, "Must have an element klass");
939 if (element_klass->is_value()) {
940 ValueKlass* vk = ValueKlass::cast(InstanceKlass::cast(element_klass));
941 assert(vk->java_mirror() == vk->value_mirror(), "primary mirror is the value mirror");
942 assert(vk->indirect_mirror() != NULL, "must have an indirect class mirror");
943 comp_mirror = k->name()->is_Q_array_signature() ? Handle(THREAD, vk->value_mirror())
944 : Handle(THREAD, vk->indirect_mirror());
945 } else {
946 comp_mirror = Handle(THREAD, element_klass->java_mirror());
947 }
948 }
949 assert(comp_mirror() != NULL, "must have a mirror");
950
951 // Two-way link between the array klass and its component mirror:
952 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
953 set_component_mirror(mirror(), comp_mirror());
954 // See below for ordering dependencies between field array_klass in component mirror
955 // and java_mirror in this klass.
956 } else {
957 assert(k->is_instance_klass(), "Must be");
958
959 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
960 if (HAS_PENDING_EXCEPTION) {
961 // If any of the fields throws an exception like OOM remove the klass field
962 // from the mirror so GC doesn't follow it after the klass has been deallocated.
963 // This mirror looks like a primitive type, which logically it is because it
964 // it represents no class.
965 java_lang_Class::set_klass(mirror(), NULL);
966 return;
967 }
968 }
969
970 // set the classLoader field in the java_lang_Class instance
971 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
972 set_class_loader(mirror(), class_loader());
973
974 // Setup indirection from klass->mirror
975 // after any exceptions can happen during allocations.
976 k->set_java_mirror(mirror);
977
978 // Set the module field in the java_lang_Class instance. This must be done
979 // after the mirror is set.
980 set_mirror_module_field(k, mirror, module, THREAD);
981
982 if (comp_mirror() != NULL) {
983 // Set after k->java_mirror() is published, because compiled code running
984 // concurrently doesn't expect a k to have a null java_mirror.
985 release_set_array_klass(comp_mirror(), k);
986 }
987
988 if (k->is_value()) {
989 // create the secondary mirror for an inline class
990 oop indirect_mirror_oop = create_indirect_type_mirror(k, mirror, CHECK);
991 set_inline_type_mirror(mirror(), mirror());
992 set_indirect_type_mirror(mirror(), indirect_mirror_oop);
993 }
994 } else {
995 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
996 fixup_mirror_list()->push(k);
997 }
998 }
999
1000 // Create the secondary mirror for inline class. Sets all the fields of this java.lang.Class
1001 // instance with the same value as the primary mirror
1002 oop java_lang_Class::create_indirect_type_mirror(Klass* k, Handle mirror, TRAPS) {
1003 assert(k->is_value(), "inline class");
1004 // Allocate mirror (java.lang.Class instance)
1005 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0);
1006 Handle indirect_mirror(THREAD, mirror_oop);
1007
1008 java_lang_Class::set_klass(indirect_mirror(), k);
1009 java_lang_Class::set_static_oop_field_count(indirect_mirror(), static_oop_field_count(mirror()));
1010 // ## do we need to set init lock?
1011 java_lang_Class::set_init_lock(indirect_mirror(), init_lock(mirror()));
1012
1013 set_protection_domain(indirect_mirror(), protection_domain(mirror()));
1014 set_class_loader(indirect_mirror(), class_loader(mirror()));
1015 // ## handle if java.base is not yet defined
1016 set_module(indirect_mirror(), module(mirror()));
1017 set_inline_type_mirror(indirect_mirror(), mirror());
1018 set_indirect_type_mirror(indirect_mirror(), indirect_mirror());
1019 return indirect_mirror();
1020 }
1021
1022 #if INCLUDE_CDS_JAVA_HEAP
1023 // Clears mirror fields. Static final fields with initial values are reloaded
1024 // from constant pool. The object identity hash is in the object header and is
1025 // not affected.
1026 class ResetMirrorField: public FieldClosure {
1027 private:
1028 Handle _m;
1029
1030 public:
1031 ResetMirrorField(Handle mirror) : _m(mirror) {}
1032
1033 void do_field(fieldDescriptor* fd) {
1034 assert(DumpSharedSpaces, "dump time only");
1035 assert(_m.not_null(), "Mirror cannot be NULL");
1036
1037 if (fd->is_static() && fd->has_initial_value()) {
1038 initialize_static_field(fd, _m, Thread::current());
1039 return;
1040 }
1041
1042 BasicType ft = fd->field_type();
1043 switch (ft) {
1044 case T_BYTE:
1045 _m()->byte_field_put(fd->offset(), 0);
1046 break;
1047 case T_CHAR:
1048 _m()->char_field_put(fd->offset(), 0);
1049 break;
1050 case T_DOUBLE:
1051 _m()->double_field_put(fd->offset(), 0);
1052 break;
1053 case T_FLOAT:
1054 _m()->float_field_put(fd->offset(), 0);
1055 break;
1056 case T_INT:
1057 _m()->int_field_put(fd->offset(), 0);
1058 break;
1059 case T_LONG:
1060 _m()->long_field_put(fd->offset(), 0);
1061 break;
1062 case T_SHORT:
1063 _m()->short_field_put(fd->offset(), 0);
1064 break;
1065 case T_BOOLEAN:
1066 _m()->bool_field_put(fd->offset(), false);
1067 break;
1068 case T_ARRAY:
1069 case T_OBJECT: {
1070 // It might be useful to cache the String field, but
1071 // for now just clear out any reference field
1072 oop o = _m()->obj_field(fd->offset());
1073 _m()->obj_field_put(fd->offset(), NULL);
1074 break;
1075 }
1076 default:
1077 ShouldNotReachHere();
1078 break;
1079 }
1080 }
1081 };
1082
1083 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1084 assert(HeapShared::is_heap_object_archiving_allowed(),
1085 "HeapShared::is_heap_object_archiving_allowed() must be true");
1086
1087 for (int t = 0; t <= T_VOID; t++) {
1088 oop m = Universe::_mirrors[t];
1089 if (m != NULL) {
1090 // Update the field at _array_klass_offset to point to the relocated array klass.
1091 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1092 assert(archived_m != NULL, "sanity");
1093 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1094 assert(ak != NULL || t == T_VOID, "should not be NULL");
1095 if (ak != NULL) {
1096 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1097 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1098 }
1099
1100 // Clear the fields. Just to be safe
1101 Klass *k = m->klass();
1102 Handle archived_mirror_h(THREAD, archived_m);
1103 ResetMirrorField reset(archived_mirror_h);
1104 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1105
1106 log_trace(cds, heap, mirror)(
1107 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1108 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1109
1110 Universe::_mirrors[t] = archived_m;
1111 }
1112 }
1113
1114 assert(Universe::_mirrors[T_INT] != NULL &&
1115 Universe::_mirrors[T_FLOAT] != NULL &&
1116 Universe::_mirrors[T_DOUBLE] != NULL &&
1117 Universe::_mirrors[T_BYTE] != NULL &&
1118 Universe::_mirrors[T_BOOLEAN] != NULL &&
1119 Universe::_mirrors[T_CHAR] != NULL &&
1120 Universe::_mirrors[T_LONG] != NULL &&
1121 Universe::_mirrors[T_SHORT] != NULL &&
1122 Universe::_mirrors[T_VOID] != NULL, "sanity");
1123
1124 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1125 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1126 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1127 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1128 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1129 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1130 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1131 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1132 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1133 }
1134
1135 //
1136 // After the mirror object is successfully archived, the archived
1137 // klass is set with _has_archived_raw_mirror flag.
1138 //
1139 // The _has_archived_raw_mirror flag is cleared at runtime when the
1140 // archived mirror is restored. If archived java heap data cannot
1141 // be used at runtime, new mirror object is created for the shared
1142 // class. The _has_archived_raw_mirror is cleared also during the process.
1143 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1144 assert(HeapShared::is_heap_object_archiving_allowed(),
1145 "HeapShared::is_heap_object_archiving_allowed() must be true");
1146
1147 // Mirror is already archived
1148 if (k->has_raw_archived_mirror()) {
1149 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1150 return k->archived_java_mirror_raw();
1151 }
1152
1153 // No mirror
1154 oop mirror = k->java_mirror();
1155 if (mirror == NULL) {
1156 return NULL;
1157 }
1158
1159 if (k->is_instance_klass()) {
1160 InstanceKlass *ik = InstanceKlass::cast(k);
1161 assert(ik->signers() == NULL, "class with signer should have been excluded");
1162
1163 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1164 ik->is_shared_app_class())) {
1165 // Archiving mirror for classes from non-builtin loaders is not
1166 // supported. Clear the _java_mirror within the archived class.
1167 k->set_java_mirror_handle(NULL);
1168 return NULL;
1169 }
1170 }
1171
1172 // Now start archiving the mirror object
1173 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1174 if (archived_mirror == NULL) {
1175 return NULL;
1176 }
1177
1178 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1179 if (archived_mirror == NULL) {
1180 return NULL;
1181 }
1182
1183 k->set_archived_java_mirror_raw(archived_mirror);
1184
1185 k->set_has_raw_archived_mirror();
1186
1187 ResourceMark rm;
1188 log_trace(cds, heap, mirror)(
1189 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1190 k->external_name(), p2i(mirror), p2i(archived_mirror));
1191
1192 return archived_mirror;
1193 }
1194
1195 // The process is based on create_mirror().
1196 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1197 oop archived_mirror,
1198 Thread *THREAD) {
1199 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1200 // to archived metadata and objects below.
1201 Klass *c = archived_mirror->klass();
1202 Handle archived_mirror_h(THREAD, archived_mirror);
1203 ResetMirrorField reset(archived_mirror_h);
1204 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1205
1206 if (k->is_array_klass()) {
1207 oop archived_comp_mirror;
1208 if (k->is_typeArray_klass()) {
1209 // The primitive type mirrors are already archived. Get the archived mirror.
1210 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1211 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1212 assert(archived_comp_mirror != NULL, "Must be");
1213 } else {
1214 assert(k->is_objArray_klass(), "Must be");
1215 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1216 assert(element_klass != NULL, "Must have an element klass");
1217 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1218 if (archived_comp_mirror == NULL) {
1219 return NULL;
1220 }
1221 }
1222 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1223 } else {
1224 assert(k->is_instance_klass(), "Must be");
1225
1226 // Reset local static fields in the mirror
1227 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1228
1229 java_lang_Class:set_init_lock(archived_mirror, NULL);
1230
1231 set_protection_domain(archived_mirror, NULL);
1232 }
1233
1234 // clear class loader and mirror_module_field
1235 set_class_loader(archived_mirror, NULL);
1236 set_module(archived_mirror, NULL);
1237
1238 // The archived mirror's field at _klass_offset is still pointing to the original
1239 // klass. Updated the field in the archived mirror to point to the relocated
1240 // klass in the archive.
1241 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1242 log_debug(cds, heap, mirror)(
1243 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1244 p2i(as_Klass(mirror)), p2i(reloc_k));
1245 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1246
1247 // The field at _array_klass_offset is pointing to the original one dimension
1248 // higher array klass if exists. Relocate the pointer.
1249 Klass *arr = array_klass_acquire(mirror);
1250 if (arr != NULL) {
1251 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1252 log_debug(cds, heap, mirror)(
1253 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1254 p2i(arr), p2i(reloc_arr));
1255 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1256 }
1257 return archived_mirror;
1258 }
1259
1260 // Returns true if the mirror is updated, false if no archived mirror
1261 // data is present. After the archived mirror object is restored, the
1262 // shared klass' _has_raw_archived_mirror flag is cleared.
1263 bool java_lang_Class::restore_archived_mirror(Klass *k,
1264 Handle class_loader, Handle module,
1265 Handle protection_domain, TRAPS) {
1266 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1267 // see more details in SystemDictionary::resolve_well_known_classes().
1268 if (!SystemDictionary::Class_klass_loaded()) {
1269 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1270 fixup_mirror_list()->push(k);
1271 return true;
1272 }
1273
1274 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1275
1276 if (m == NULL) {
1277 return false;
1278 }
1279
1280 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1281
1282 // mirror is archived, restore
1283 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1284 Handle mirror(THREAD, m);
1285
1286 if (!k->is_array_klass()) {
1287 // - local static final fields with initial values were initialized at dump time
1288
1289 // create the init_lock
1290 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1291 set_init_lock(mirror(), r);
1292
1293 if (protection_domain.not_null()) {
1294 set_protection_domain(mirror(), protection_domain());
1295 }
1296 }
1297
1298 assert(class_loader() == k->class_loader(), "should be same");
1299 if (class_loader.not_null()) {
1300 set_class_loader(mirror(), class_loader());
1301 }
1302
1303 k->set_java_mirror(mirror);
1304 k->clear_has_raw_archived_mirror();
1305
1306 set_mirror_module_field(k, mirror, module, THREAD);
1307
1308 ResourceMark rm;
1309 log_trace(cds, heap, mirror)(
1310 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1311
1312 return true;
1313 }
1314 #endif // INCLUDE_CDS_JAVA_HEAP
1315
1316 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1317 assert(_module_offset != 0, "must have been computed already");
1318 java_lang_Class::set_module(k->java_mirror(), module());
1319 }
1320
1321 int java_lang_Class::oop_size(oop java_class) {
1322 assert(_oop_size_offset != 0, "must be set");
1323 int size = java_class->int_field(_oop_size_offset);
1324 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1325 return size;
1326 }
1327
1328
1329 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1330 assert(_oop_size_offset != 0, "must be set");
1331 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1332 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1333 }
1334
1335 int java_lang_Class::static_oop_field_count(oop java_class) {
1336 assert(_static_oop_field_count_offset != 0, "must be set");
1337 return java_class->int_field(_static_oop_field_count_offset);
1338 }
1339
1340 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1341 assert(_static_oop_field_count_offset != 0, "must be set");
1342 return java_class->int_field_raw(_static_oop_field_count_offset);
1343 }
1344
1345 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1346 assert(_static_oop_field_count_offset != 0, "must be set");
1347 java_class->int_field_put(_static_oop_field_count_offset, size);
1348 }
1349
1350 oop java_lang_Class::protection_domain(oop java_class) {
1351 assert(_protection_domain_offset != 0, "must be set");
1352 return java_class->obj_field(_protection_domain_offset);
1353 }
1354 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1355 assert(_protection_domain_offset != 0, "must be set");
1356 java_class->obj_field_put(_protection_domain_offset, pd);
1357 }
1358
1359 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1360 assert(_component_mirror_offset != 0, "must be set");
1361 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1362 }
1363 oop java_lang_Class::component_mirror(oop java_class) {
1364 assert(_component_mirror_offset != 0, "must be set");
1365 return java_class->obj_field(_component_mirror_offset);
1366 }
1367
1368 oop java_lang_Class::init_lock(oop java_class) {
1369 assert(_init_lock_offset != 0, "must be set");
1370 return java_class->obj_field(_init_lock_offset);
1371 }
1372 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1373 assert(_init_lock_offset != 0, "must be set");
1374 java_class->obj_field_put(_init_lock_offset, init_lock);
1375 }
1376
1377 objArrayOop java_lang_Class::signers(oop java_class) {
1378 assert(_signers_offset != 0, "must be set");
1379 return (objArrayOop)java_class->obj_field(_signers_offset);
1380 }
1381 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1382 assert(_signers_offset != 0, "must be set");
1383 java_class->obj_field_put(_signers_offset, (oop)signers);
1384 }
1385
1386
1387 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1388 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1389 if (_class_loader_offset != 0) {
1390 java_class->obj_field_put(_class_loader_offset, loader);
1391 }
1392 }
1393
1394 oop java_lang_Class::class_loader(oop java_class) {
1395 assert(_class_loader_offset != 0, "must be set");
1396 return java_class->obj_field(_class_loader_offset);
1397 }
1398
1399 oop java_lang_Class::module(oop java_class) {
1400 assert(_module_offset != 0, "must be set");
1401 return java_class->obj_field(_module_offset);
1402 }
1403
1404 void java_lang_Class::set_module(oop java_class, oop module) {
1405 assert(_module_offset != 0, "must be set");
1406 java_class->obj_field_put(_module_offset, module);
1407 }
1408
1409 oop java_lang_Class::name(Handle java_class, TRAPS) {
1410 assert(_name_offset != 0, "must be set");
1411 oop o = java_class->obj_field(_name_offset);
1412 if (o == NULL) {
1413 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1414 java_class->obj_field_put(_name_offset, o);
1415 }
1416 return o;
1417 }
1418
1419 oop java_lang_Class::source_file(oop java_class) {
1420 assert(_source_file_offset != 0, "must be set");
1421 return java_class->obj_field(_source_file_offset);
1422 }
1423
1424 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1425 assert(_source_file_offset != 0, "must be set");
1426 java_class->obj_field_put(_source_file_offset, source_file);
1427 }
1428
1429 oop java_lang_Class::inline_type_mirror(oop java_class) {
1430 assert(_inline_mirror_offset != 0, "must be set");
1431 return java_class->obj_field(_inline_mirror_offset);
1432 }
1433
1434 void java_lang_Class::set_inline_type_mirror(oop java_class, oop mirror) {
1435 assert(_inline_mirror_offset != 0, "must be set");
1436 java_class->obj_field_put(_inline_mirror_offset, mirror);
1437 }
1438
1439 oop java_lang_Class::indirect_type_mirror(oop java_class) {
1440 assert(_indirect_mirror_offset != 0, "must be set");
1441 return java_class->obj_field(_indirect_mirror_offset);
1442 }
1443
1444 void java_lang_Class::set_indirect_type_mirror(oop java_class, oop mirror) {
1445 assert(_indirect_mirror_offset != 0, "must be set");
1446 java_class->obj_field_put(_indirect_mirror_offset, mirror);
1447 }
1448
1449 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1450 // This should be improved by adding a field at the Java level or by
1451 // introducing a new VM klass (see comment in ClassFileParser)
1452 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1453 if (type != T_VOID) {
1454 Klass* aklass = Universe::typeArrayKlassObj(type);
1455 assert(aklass != NULL, "correct bootstrap");
1456 release_set_array_klass(java_class, aklass);
1457 }
1458 #ifdef ASSERT
1459 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1460 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1461 #endif
1462 return java_class;
1463 }
1464
1465
1466 Klass* java_lang_Class::as_Klass(oop java_class) {
1467 //%note memory_2
1468 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1469 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1470 assert(k == NULL || k->is_klass(), "type check");
1471 return k;
1472 }
1473
1474 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1475 //%note memory_2
1476 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1477 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1478 assert(k == NULL || k->is_klass(), "type check");
1479 return k;
1480 }
1481
1482
1483 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1484 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1485 java_class->metadata_field_put(_klass_offset, klass);
1486 }
1487
1488
1489 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1490 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1491 Symbol* name = NULL;
1492 bool is_instance = false;
1493 bool is_value = false;
1494 if (is_primitive(java_class)) {
1495 name = vmSymbols::type_signature(primitive_type(java_class));
1496 } else {
1497 Klass* k = as_Klass(java_class);
1498 is_instance = k->is_instance_klass();
1499 is_value = k->is_value();
1500 name = k->name();
1501 }
1502 if (name == NULL) {
1503 st->print("<null>");
1504 return;
1505 }
1506 if (is_instance) {
1507 if (is_value && (java_class == inline_type_mirror(java_class))) {
1508 st->print("Q");
1509 } else {
1510 st->print("L");
1511 }
1512 }
1513 st->write((char*) name->base(), (int) name->utf8_length());
1514 if (is_instance) st->print(";");
1515 }
1516
1517 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1518 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1519 Symbol* name;
1520 if (is_primitive(java_class)) {
1521 name = vmSymbols::type_signature(primitive_type(java_class));
1522 // Because this can create a new symbol, the caller has to decrement
1523 // the refcount, so make adjustment here and below for symbols returned
1524 // that are not created or incremented due to a successful lookup.
1525 name->increment_refcount();
1526 } else {
1527 Klass* k = as_Klass(java_class);
1528 if (!k->is_instance_klass()) {
1529 name = k->name();
1530 name->increment_refcount();
1531 } else {
1532 ResourceMark rm;
1533 const char* sigstr;
1534 if (k->is_value()) {
1535 char c = (java_class == inline_type_mirror(java_class)) ? 'Q' : 'L';
1536 sigstr = InstanceKlass::cast(k)->signature_name_of(c);
1537 } else {
1538 sigstr = k->signature_name();
1539 }
1540 int siglen = (int) strlen(sigstr);
1541 if (!intern_if_not_found) {
1542 name = SymbolTable::probe(sigstr, siglen);
1543 } else {
1544 name = SymbolTable::new_symbol(sigstr, siglen);
1545 }
1546 }
1547 }
1548 return name;
1549 }
1550
1551 // Returns the Java name for this Java mirror (Resource allocated)
1552 // See Klass::external_name().
1553 // For primitive type Java mirrors, its type name is returned.
1554 const char* java_lang_Class::as_external_name(oop java_class) {
1555 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1556 const char* name = NULL;
1557 if (is_primitive(java_class)) {
1558 name = type2name(primitive_type(java_class));
1559 } else {
1560 name = as_Klass(java_class)->external_name();
1561 }
1562 if (name == NULL) {
1563 name = "<null>";
1564 }
1565 return name;
1566 }
1567
1568 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1569 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1570 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1571 return k;
1572 }
1573
1574
1575 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1576 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1577 java_class->release_metadata_field_put(_array_klass_offset, klass);
1578 }
1579
1580
1581 BasicType java_lang_Class::primitive_type(oop java_class) {
1582 assert(java_lang_Class::is_primitive(java_class), "just checking");
1583 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1584 BasicType type = T_VOID;
1585 if (ak != NULL) {
1586 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1587 type = ArrayKlass::cast(ak)->element_type();
1588 } else {
1589 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1590 }
1591 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1592 return type;
1593 }
1594
1595 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1596 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1597 if (is_primitive(java_class)) {
1598 if (reference_klass != NULL)
1599 (*reference_klass) = NULL;
1600 return primitive_type(java_class);
1601 } else {
1602 if (reference_klass != NULL)
1603 (*reference_klass) = as_Klass(java_class);
1604 return T_OBJECT;
1605 }
1606 }
1607
1608
1609 oop java_lang_Class::primitive_mirror(BasicType t) {
1610 oop mirror = Universe::java_mirror(t);
1611 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1612 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1613 return mirror;
1614 }
1615
1616 bool java_lang_Class::offsets_computed = false;
1617 int java_lang_Class::classRedefinedCount_offset = -1;
1618
1619 #define CLASS_FIELDS_DO(macro) \
1620 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1621 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1622 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1623 macro(_module_offset, k, "module", module_signature, false); \
1624 macro(_name_offset, k, "name", string_signature, false); \
1625 macro(_inline_mirror_offset, k, "inlineType", class_signature, false); \
1626 macro(_indirect_mirror_offset, k, "indirectType", class_signature, false); \
1627
1628 void java_lang_Class::compute_offsets() {
1629 if (offsets_computed) {
1630 return;
1631 }
1632
1633 offsets_computed = true;
1634
1635 InstanceKlass* k = SystemDictionary::Class_klass();
1636 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1637
1638 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1639 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1640 // GC treats them the same.
1641 _init_lock_offset = _component_mirror_offset;
1642
1643 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1644 }
1645
1646 #if INCLUDE_CDS
1647 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1648 f->do_bool(&offsets_computed);
1649 f->do_u4((u4*)&_init_lock_offset);
1650
1651 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1652
1653 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1654 }
1655 #endif
1656
1657 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1658 if (classRedefinedCount_offset == -1) {
1659 // If we don't have an offset for it then just return -1 as a marker.
1660 return -1;
1661 }
1662
1663 return the_class_mirror->int_field(classRedefinedCount_offset);
1664 }
1665
1666 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1667 if (classRedefinedCount_offset == -1) {
1668 // If we don't have an offset for it then nothing to set.
1669 return;
1670 }
1671
1672 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1673 }
1674
1675
1676 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1677 // platform thread structure, and a eetop offset which was used for thread
1678 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1679 // merged, so in the HotSpot VM we just use the eetop field for the thread
1680 // instead of the privateInfo_offset.
1681 //
1682 // Note: The stackSize field is only present starting in 1.4.
1683
1684 int java_lang_Thread::_name_offset = 0;
1685 int java_lang_Thread::_group_offset = 0;
1686 int java_lang_Thread::_contextClassLoader_offset = 0;
1687 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1688 int java_lang_Thread::_priority_offset = 0;
1689 int java_lang_Thread::_eetop_offset = 0;
1690 int java_lang_Thread::_daemon_offset = 0;
1691 int java_lang_Thread::_stillborn_offset = 0;
1692 int java_lang_Thread::_stackSize_offset = 0;
1693 int java_lang_Thread::_tid_offset = 0;
1694 int java_lang_Thread::_thread_status_offset = 0;
1695 int java_lang_Thread::_park_blocker_offset = 0;
1696
1697 #define THREAD_FIELDS_DO(macro) \
1698 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1699 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1700 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1701 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1702 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1703 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1704 macro(_eetop_offset, k, "eetop", long_signature, false); \
1705 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1706 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1707 macro(_tid_offset, k, "tid", long_signature, false); \
1708 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1709 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false)
1710
1711 void java_lang_Thread::compute_offsets() {
1712 assert(_group_offset == 0, "offsets should be initialized only once");
1713
1714 InstanceKlass* k = SystemDictionary::Thread_klass();
1715 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1716 }
1717
1718 #if INCLUDE_CDS
1719 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1720 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1721 }
1722 #endif
1723
1724 JavaThread* java_lang_Thread::thread(oop java_thread) {
1725 return (JavaThread*)java_thread->address_field(_eetop_offset);
1726 }
1727
1728
1729 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1730 java_thread->address_field_put(_eetop_offset, (address)thread);
1731 }
1732
1733
1734 oop java_lang_Thread::name(oop java_thread) {
1735 return java_thread->obj_field(_name_offset);
1736 }
1737
1738
1739 void java_lang_Thread::set_name(oop java_thread, oop name) {
1740 java_thread->obj_field_put(_name_offset, name);
1741 }
1742
1743
1744 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1745 return (ThreadPriority)java_thread->int_field(_priority_offset);
1746 }
1747
1748
1749 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1750 java_thread->int_field_put(_priority_offset, priority);
1751 }
1752
1753
1754 oop java_lang_Thread::threadGroup(oop java_thread) {
1755 return java_thread->obj_field(_group_offset);
1756 }
1757
1758
1759 bool java_lang_Thread::is_stillborn(oop java_thread) {
1760 return java_thread->bool_field(_stillborn_offset) != 0;
1761 }
1762
1763
1764 // We never have reason to turn the stillborn bit off
1765 void java_lang_Thread::set_stillborn(oop java_thread) {
1766 java_thread->bool_field_put(_stillborn_offset, true);
1767 }
1768
1769
1770 bool java_lang_Thread::is_alive(oop java_thread) {
1771 JavaThread* thr = java_lang_Thread::thread(java_thread);
1772 return (thr != NULL);
1773 }
1774
1775
1776 bool java_lang_Thread::is_daemon(oop java_thread) {
1777 return java_thread->bool_field(_daemon_offset) != 0;
1778 }
1779
1780
1781 void java_lang_Thread::set_daemon(oop java_thread) {
1782 java_thread->bool_field_put(_daemon_offset, true);
1783 }
1784
1785 oop java_lang_Thread::context_class_loader(oop java_thread) {
1786 return java_thread->obj_field(_contextClassLoader_offset);
1787 }
1788
1789 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1790 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1791 }
1792
1793
1794 jlong java_lang_Thread::stackSize(oop java_thread) {
1795 return java_thread->long_field(_stackSize_offset);
1796 }
1797
1798 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1799 void java_lang_Thread::set_thread_status(oop java_thread,
1800 java_lang_Thread::ThreadStatus status) {
1801 java_thread->int_field_put(_thread_status_offset, status);
1802 }
1803
1804 // Read thread status value from threadStatus field in java.lang.Thread java class.
1805 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1806 // Make sure the caller is operating on behalf of the VM or is
1807 // running VM code (state == _thread_in_vm).
1808 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1809 JavaThread::current()->thread_state() == _thread_in_vm,
1810 "Java Thread is not running in vm");
1811 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1812 }
1813
1814
1815 jlong java_lang_Thread::thread_id(oop java_thread) {
1816 return java_thread->long_field(_tid_offset);
1817 }
1818
1819 oop java_lang_Thread::park_blocker(oop java_thread) {
1820 return java_thread->obj_field(_park_blocker_offset);
1821 }
1822
1823 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1824 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1825 switch (status) {
1826 case NEW : return "NEW";
1827 case RUNNABLE : return "RUNNABLE";
1828 case SLEEPING : return "TIMED_WAITING (sleeping)";
1829 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1830 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1831 case PARKED : return "WAITING (parking)";
1832 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1833 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1834 case TERMINATED : return "TERMINATED";
1835 default : return "UNKNOWN";
1836 };
1837 }
1838 int java_lang_ThreadGroup::_parent_offset = 0;
1839 int java_lang_ThreadGroup::_name_offset = 0;
1840 int java_lang_ThreadGroup::_threads_offset = 0;
1841 int java_lang_ThreadGroup::_groups_offset = 0;
1842 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1843 int java_lang_ThreadGroup::_destroyed_offset = 0;
1844 int java_lang_ThreadGroup::_daemon_offset = 0;
1845 int java_lang_ThreadGroup::_nthreads_offset = 0;
1846 int java_lang_ThreadGroup::_ngroups_offset = 0;
1847
1848 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1849 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1850 return java_thread_group->obj_field(_parent_offset);
1851 }
1852
1853 // ("name as oop" accessor is not necessary)
1854
1855 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1856 oop name = java_thread_group->obj_field(_name_offset);
1857 // ThreadGroup.name can be null
1858 if (name != NULL) {
1859 return java_lang_String::as_utf8_string(name);
1860 }
1861 return NULL;
1862 }
1863
1864 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1865 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1866 return java_thread_group->int_field(_nthreads_offset);
1867 }
1868
1869 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1870 oop threads = java_thread_group->obj_field(_threads_offset);
1871 assert(threads != NULL, "threadgroups should have threads");
1872 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1873 return objArrayOop(threads);
1874 }
1875
1876 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1877 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1878 return java_thread_group->int_field(_ngroups_offset);
1879 }
1880
1881 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1882 oop groups = java_thread_group->obj_field(_groups_offset);
1883 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1884 return objArrayOop(groups);
1885 }
1886
1887 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1888 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1889 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1890 }
1891
1892 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1893 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1894 return java_thread_group->bool_field(_destroyed_offset) != 0;
1895 }
1896
1897 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1898 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1899 return java_thread_group->bool_field(_daemon_offset) != 0;
1900 }
1901
1902 #define THREADGROUP_FIELDS_DO(macro) \
1903 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1904 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1905 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1906 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1907 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1908 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1909 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1910 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1911 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1912
1913 void java_lang_ThreadGroup::compute_offsets() {
1914 assert(_parent_offset == 0, "offsets should be initialized only once");
1915
1916 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1917 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1918 }
1919
1920 #if INCLUDE_CDS
1921 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1922 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1923 }
1924 #endif
1925
1926 #define THROWABLE_FIELDS_DO(macro) \
1927 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1928 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1929 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1930 macro(depth_offset, k, "depth", int_signature, false); \
1931 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1932
1933 void java_lang_Throwable::compute_offsets() {
1934 InstanceKlass* k = SystemDictionary::Throwable_klass();
1935 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1936 }
1937
1938 #if INCLUDE_CDS
1939 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1940 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1941 }
1942 #endif
1943
1944 oop java_lang_Throwable::unassigned_stacktrace() {
1945 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1946 oop base = ik->static_field_base_raw();
1947 return base->obj_field(static_unassigned_stacktrace_offset);
1948 }
1949
1950 oop java_lang_Throwable::backtrace(oop throwable) {
1951 return throwable->obj_field_acquire(backtrace_offset);
1952 }
1953
1954
1955 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1956 throwable->release_obj_field_put(backtrace_offset, value);
1957 }
1958
1959 int java_lang_Throwable::depth(oop throwable) {
1960 return throwable->int_field(depth_offset);
1961 }
1962
1963 void java_lang_Throwable::set_depth(oop throwable, int value) {
1964 throwable->int_field_put(depth_offset, value);
1965 }
1966
1967 oop java_lang_Throwable::message(oop throwable) {
1968 return throwable->obj_field(detailMessage_offset);
1969 }
1970
1971
1972 // Return Symbol for detailed_message or NULL
1973 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1974 PRESERVE_EXCEPTION_MARK; // Keep original exception
1975 oop detailed_message = java_lang_Throwable::message(throwable);
1976 if (detailed_message != NULL) {
1977 return java_lang_String::as_symbol(detailed_message);
1978 }
1979 return NULL;
1980 }
1981
1982 void java_lang_Throwable::set_message(oop throwable, oop value) {
1983 throwable->obj_field_put(detailMessage_offset, value);
1984 }
1985
1986
1987 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1988 throwable->obj_field_put(stackTrace_offset, st_element_array);
1989 }
1990
1991 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1992 set_stacktrace(throwable, NULL);
1993 }
1994
1995
1996 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1997 ResourceMark rm;
1998 Klass* k = throwable->klass();
1999 assert(k != NULL, "just checking");
2000 st->print("%s", k->external_name());
2001 oop msg = message(throwable);
2002 if (msg != NULL) {
2003 st->print(": %s", java_lang_String::as_utf8_string(msg));
2004 }
2005 }
2006
2007 // After this many redefines, the stack trace is unreliable.
2008 const int MAX_VERSION = USHRT_MAX;
2009
2010 static inline bool version_matches(Method* method, int version) {
2011 assert(version < MAX_VERSION, "version is too big");
2012 return method != NULL && (method->constants()->version() == version);
2013 }
2014
2015
2016 // This class provides a simple wrapper over the internal structure of
2017 // exception backtrace to insulate users of the backtrace from needing
2018 // to know what it looks like.
2019 class BacktraceBuilder: public StackObj {
2020 friend class BacktraceIterator;
2021 private:
2022 Handle _backtrace;
2023 objArrayOop _head;
2024 typeArrayOop _methods;
2025 typeArrayOop _bcis;
2026 objArrayOop _mirrors;
2027 typeArrayOop _names; // needed to insulate method name against redefinition
2028 int _index;
2029 NoSafepointVerifier _nsv;
2030
2031 enum {
2032 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2033 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2034 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2035 trace_names_offset = java_lang_Throwable::trace_names_offset,
2036 trace_next_offset = java_lang_Throwable::trace_next_offset,
2037 trace_size = java_lang_Throwable::trace_size,
2038 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2039 };
2040
2041 // get info out of chunks
2042 static typeArrayOop get_methods(objArrayHandle chunk) {
2043 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2044 assert(methods != NULL, "method array should be initialized in backtrace");
2045 return methods;
2046 }
2047 static typeArrayOop get_bcis(objArrayHandle chunk) {
2048 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2049 assert(bcis != NULL, "bci array should be initialized in backtrace");
2050 return bcis;
2051 }
2052 static objArrayOop get_mirrors(objArrayHandle chunk) {
2053 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2054 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2055 return mirrors;
2056 }
2057 static typeArrayOop get_names(objArrayHandle chunk) {
2058 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2059 assert(names != NULL, "names array should be initialized in backtrace");
2060 return names;
2061 }
2062
2063 public:
2064
2065 // constructor for new backtrace
2066 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2067 expand(CHECK);
2068 _backtrace = Handle(THREAD, _head);
2069 _index = 0;
2070 }
2071
2072 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2073 _methods = get_methods(backtrace);
2074 _bcis = get_bcis(backtrace);
2075 _mirrors = get_mirrors(backtrace);
2076 _names = get_names(backtrace);
2077 assert(_methods->length() == _bcis->length() &&
2078 _methods->length() == _mirrors->length() &&
2079 _mirrors->length() == _names->length(),
2080 "method and source information arrays should match");
2081
2082 // head is the preallocated backtrace
2083 _head = backtrace();
2084 _backtrace = Handle(thread, _head);
2085 _index = 0;
2086 }
2087
2088 void expand(TRAPS) {
2089 objArrayHandle old_head(THREAD, _head);
2090 PauseNoSafepointVerifier pnsv(&_nsv);
2091
2092 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2093 objArrayHandle new_head(THREAD, head);
2094
2095 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2096 typeArrayHandle new_methods(THREAD, methods);
2097
2098 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2099 typeArrayHandle new_bcis(THREAD, bcis);
2100
2101 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2102 objArrayHandle new_mirrors(THREAD, mirrors);
2103
2104 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2105 typeArrayHandle new_names(THREAD, names);
2106
2107 if (!old_head.is_null()) {
2108 old_head->obj_at_put(trace_next_offset, new_head());
2109 }
2110 new_head->obj_at_put(trace_methods_offset, new_methods());
2111 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2112 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2113 new_head->obj_at_put(trace_names_offset, new_names());
2114
2115 _head = new_head();
2116 _methods = new_methods();
2117 _bcis = new_bcis();
2118 _mirrors = new_mirrors();
2119 _names = new_names();
2120 _index = 0;
2121 }
2122
2123 oop backtrace() {
2124 return _backtrace();
2125 }
2126
2127 inline void push(Method* method, int bci, TRAPS) {
2128 // Smear the -1 bci to 0 since the array only holds unsigned
2129 // shorts. The later line number lookup would just smear the -1
2130 // to a 0 even if it could be recorded.
2131 if (bci == SynchronizationEntryBCI) bci = 0;
2132
2133 if (_index >= trace_chunk_size) {
2134 methodHandle mhandle(THREAD, method);
2135 expand(CHECK);
2136 method = mhandle();
2137 }
2138
2139 _methods->ushort_at_put(_index, method->orig_method_idnum());
2140 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2141
2142 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2143 // klass owning the symbols alive so their refcounts aren't decremented.
2144 Symbol* name = method->name();
2145 _names->symbol_at_put(_index, name);
2146
2147 // We need to save the mirrors in the backtrace to keep the class
2148 // from being unloaded while we still have this stack trace.
2149 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2150 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2151 _index++;
2152 }
2153
2154 };
2155
2156 struct BacktraceElement : public StackObj {
2157 int _method_id;
2158 int _bci;
2159 int _version;
2160 Symbol* _name;
2161 Handle _mirror;
2162 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2163 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2164 };
2165
2166 class BacktraceIterator : public StackObj {
2167 int _index;
2168 objArrayHandle _result;
2169 objArrayHandle _mirrors;
2170 typeArrayHandle _methods;
2171 typeArrayHandle _bcis;
2172 typeArrayHandle _names;
2173
2174 void init(objArrayHandle result, Thread* thread) {
2175 // Get method id, bci, version and mirror from chunk
2176 _result = result;
2177 if (_result.not_null()) {
2178 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2179 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2180 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2181 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2182 _index = 0;
2183 }
2184 }
2185 public:
2186 BacktraceIterator(objArrayHandle result, Thread* thread) {
2187 init(result, thread);
2188 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2189 }
2190
2191 BacktraceElement next(Thread* thread) {
2192 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2193 _methods->ushort_at(_index),
2194 Backtrace::version_at(_bcis->int_at(_index)),
2195 Backtrace::bci_at(_bcis->int_at(_index)),
2196 _names->symbol_at(_index));
2197 _index++;
2198
2199 if (_index >= java_lang_Throwable::trace_chunk_size) {
2200 int next_offset = java_lang_Throwable::trace_next_offset;
2201 // Get next chunk
2202 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2203 init(result, thread);
2204 }
2205 return e;
2206 }
2207
2208 bool repeat() {
2209 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2210 }
2211 };
2212
2213
2214 // Print stack trace element to resource allocated buffer
2215 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2216 int version, int bci, Symbol* name) {
2217 ResourceMark rm;
2218
2219 // Get strings and string lengths
2220 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2221 const char* klass_name = holder->external_name();
2222 int buf_len = (int)strlen(klass_name);
2223
2224 char* method_name = name->as_C_string();
2225 buf_len += (int)strlen(method_name);
2226
2227 char* source_file_name = NULL;
2228 Symbol* source = Backtrace::get_source_file_name(holder, version);
2229 if (source != NULL) {
2230 source_file_name = source->as_C_string();
2231 buf_len += (int)strlen(source_file_name);
2232 }
2233
2234 char *module_name = NULL, *module_version = NULL;
2235 ModuleEntry* module = holder->module();
2236 if (module->is_named()) {
2237 module_name = module->name()->as_C_string();
2238 buf_len += (int)strlen(module_name);
2239 if (module->version() != NULL) {
2240 module_version = module->version()->as_C_string();
2241 buf_len += (int)strlen(module_version);
2242 }
2243 }
2244
2245 // Allocate temporary buffer with extra space for formatting and line number
2246 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2247
2248 // Print stack trace line in buffer
2249 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2250
2251 // Print module information
2252 if (module_name != NULL) {
2253 if (module_version != NULL) {
2254 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2255 } else {
2256 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2257 }
2258 }
2259
2260 // The method can be NULL if the requested class version is gone
2261 Method* method = holder->method_with_orig_idnum(method_id, version);
2262 if (!version_matches(method, version)) {
2263 strcat(buf, "Redefined)");
2264 } else {
2265 int line_number = Backtrace::get_line_number(method, bci);
2266 if (line_number == -2) {
2267 strcat(buf, "Native Method)");
2268 } else {
2269 if (source_file_name != NULL && (line_number != -1)) {
2270 // Sourcename and linenumber
2271 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2272 } else if (source_file_name != NULL) {
2273 // Just sourcename
2274 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2275 } else {
2276 // Neither sourcename nor linenumber
2277 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2278 }
2279 CompiledMethod* nm = method->code();
2280 if (WizardMode && nm != NULL) {
2281 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2282 }
2283 }
2284 }
2285
2286 st->print_cr("%s", buf);
2287 }
2288
2289 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2290 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2291 int method_id = method->orig_method_idnum();
2292 int version = method->constants()->version();
2293 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2294 }
2295
2296 /**
2297 * Print the throwable message and its stack trace plus all causes by walking the
2298 * cause chain. The output looks the same as of Throwable.printStackTrace().
2299 */
2300 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2301 // First, print the message.
2302 print(throwable(), st);
2303 st->cr();
2304
2305 // Now print the stack trace.
2306 Thread* THREAD = Thread::current();
2307 while (throwable.not_null()) {
2308 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2309 if (result.is_null()) {
2310 st->print_raw_cr("\t<<no stack trace available>>");
2311 return;
2312 }
2313 BacktraceIterator iter(result, THREAD);
2314
2315 while (iter.repeat()) {
2316 BacktraceElement bte = iter.next(THREAD);
2317 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2318 }
2319 {
2320 // Call getCause() which doesn't necessarily return the _cause field.
2321 EXCEPTION_MARK;
2322 JavaValue cause(T_OBJECT);
2323 JavaCalls::call_virtual(&cause,
2324 throwable,
2325 throwable->klass(),
2326 vmSymbols::getCause_name(),
2327 vmSymbols::void_throwable_signature(),
2328 THREAD);
2329 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2330 if (HAS_PENDING_EXCEPTION) {
2331 CLEAR_PENDING_EXCEPTION;
2332 throwable = Handle();
2333 } else {
2334 throwable = Handle(THREAD, (oop) cause.get_jobject());
2335 if (throwable.not_null()) {
2336 st->print("Caused by: ");
2337 print(throwable(), st);
2338 st->cr();
2339 }
2340 }
2341 }
2342 }
2343 }
2344
2345 /**
2346 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2347 */
2348 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2349 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2350 JavaValue result(T_VOID);
2351 JavaCalls::call_virtual(&result,
2352 throwable,
2353 SystemDictionary::Throwable_klass(),
2354 vmSymbols::printStackTrace_name(),
2355 vmSymbols::void_method_signature(),
2356 THREAD);
2357 }
2358
2359 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2360 if (!StackTraceInThrowable) return;
2361 ResourceMark rm(THREAD);
2362
2363 // Start out by clearing the backtrace for this object, in case the VM
2364 // runs out of memory while allocating the stack trace
2365 set_backtrace(throwable(), NULL);
2366 // Clear lazily constructed Java level stacktrace if refilling occurs
2367 // This is unnecessary in 1.7+ but harmless
2368 clear_stacktrace(throwable());
2369
2370 int max_depth = MaxJavaStackTraceDepth;
2371 JavaThread* thread = (JavaThread*)THREAD;
2372
2373 BacktraceBuilder bt(CHECK);
2374
2375 // If there is no Java frame just return the method that was being called
2376 // with bci 0
2377 if (!thread->has_last_Java_frame()) {
2378 if (max_depth >= 1 && method() != NULL) {
2379 bt.push(method(), 0, CHECK);
2380 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2381 set_depth(throwable(), 1);
2382 set_backtrace(throwable(), bt.backtrace());
2383 }
2384 return;
2385 }
2386
2387 // Instead of using vframe directly, this version of fill_in_stack_trace
2388 // basically handles everything by hand. This significantly improved the
2389 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2390 // See bug 6333838 for more details.
2391 // The "ASSERT" here is to verify this method generates the exactly same stack
2392 // trace as utilizing vframe.
2393 #ifdef ASSERT
2394 vframeStream st(thread);
2395 methodHandle st_method(THREAD, st.method());
2396 #endif
2397 int total_count = 0;
2398 RegisterMap map(thread, false);
2399 int decode_offset = 0;
2400 CompiledMethod* nm = NULL;
2401 bool skip_fillInStackTrace_check = false;
2402 bool skip_throwableInit_check = false;
2403 bool skip_hidden = !ShowHiddenFrames;
2404
2405 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2406 Method* method = NULL;
2407 int bci = 0;
2408
2409 // Compiled java method case.
2410 if (decode_offset != 0) {
2411 DebugInfoReadStream stream(nm, decode_offset);
2412 decode_offset = stream.read_int();
2413 method = (Method*)nm->metadata_at(stream.read_int());
2414 bci = stream.read_bci();
2415 } else {
2416 if (fr.is_first_frame()) break;
2417 address pc = fr.pc();
2418 if (fr.is_interpreted_frame()) {
2419 address bcp = fr.interpreter_frame_bcp();
2420 method = fr.interpreter_frame_method();
2421 bci = method->bci_from(bcp);
2422 fr = fr.sender(&map);
2423 } else {
2424 CodeBlob* cb = fr.cb();
2425 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2426 // but non nmethod
2427 fr = fr.sender(&map);
2428 if (cb == NULL || !cb->is_compiled()) {
2429 continue;
2430 }
2431 nm = cb->as_compiled_method();
2432 if (nm->method()->is_native()) {
2433 method = nm->method();
2434 bci = 0;
2435 } else {
2436 PcDesc* pd = nm->pc_desc_at(pc);
2437 decode_offset = pd->scope_decode_offset();
2438 // if decode_offset is not equal to 0, it will execute the
2439 // "compiled java method case" at the beginning of the loop.
2440 continue;
2441 }
2442 }
2443 }
2444 #ifdef ASSERT
2445 assert(st_method() == method && st.bci() == bci,
2446 "Wrong stack trace");
2447 st.next();
2448 // vframeStream::method isn't GC-safe so store off a copy
2449 // of the Method* in case we GC.
2450 if (!st.at_end()) {
2451 st_method = st.method();
2452 }
2453 #endif
2454
2455 // the format of the stacktrace will be:
2456 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2457 // - 0 or more <init> methods for the exception class (skipped)
2458 // - rest of the stack
2459
2460 if (!skip_fillInStackTrace_check) {
2461 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2462 throwable->is_a(method->method_holder())) {
2463 continue;
2464 }
2465 else {
2466 skip_fillInStackTrace_check = true; // gone past them all
2467 }
2468 }
2469 if (!skip_throwableInit_check) {
2470 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2471
2472 // skip <init> methods of the exception class and superclasses
2473 // This is similar to classic VM (before HotSpot).
2474 if (method->is_object_constructor() &&
2475 throwable->is_a(method->method_holder())) {
2476 continue;
2477 } else {
2478 // there are none or we've seen them all - either way stop checking
2479 skip_throwableInit_check = true;
2480 }
2481 }
2482 if (method->is_hidden()) {
2483 if (skip_hidden) continue;
2484 }
2485 bt.push(method, bci, CHECK);
2486 total_count++;
2487 }
2488
2489 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2490
2491 // Put completed stack trace into throwable object
2492 set_backtrace(throwable(), bt.backtrace());
2493 set_depth(throwable(), total_count);
2494 }
2495
2496 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2497 // No-op if stack trace is disabled
2498 if (!StackTraceInThrowable) {
2499 return;
2500 }
2501
2502 // Disable stack traces for some preallocated out of memory errors
2503 if (!Universe::should_fill_in_stack_trace(throwable)) {
2504 return;
2505 }
2506
2507 PRESERVE_EXCEPTION_MARK;
2508
2509 JavaThread* thread = JavaThread::active();
2510 fill_in_stack_trace(throwable, method, thread);
2511 // ignore exceptions thrown during stack trace filling
2512 CLEAR_PENDING_EXCEPTION;
2513 }
2514
2515 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2516 // Allocate stack trace - backtrace is created but not filled in
2517
2518 // No-op if stack trace is disabled
2519 if (!StackTraceInThrowable) return;
2520 BacktraceBuilder bt(CHECK); // creates a backtrace
2521 set_backtrace(throwable(), bt.backtrace());
2522 }
2523
2524
2525 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2526 // Fill in stack trace into preallocated backtrace (no GC)
2527
2528 // No-op if stack trace is disabled
2529 if (!StackTraceInThrowable) return;
2530
2531 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2532
2533 JavaThread* THREAD = JavaThread::current();
2534
2535 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2536 assert(backtrace.not_null(), "backtrace should have been preallocated");
2537
2538 ResourceMark rm(THREAD);
2539 vframeStream st(THREAD);
2540
2541 BacktraceBuilder bt(THREAD, backtrace);
2542
2543 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2544 // methods as preallocated errors aren't created by "java" code.
2545
2546 // fill in as much stack trace as possible
2547 int chunk_count = 0;
2548 for (;!st.at_end(); st.next()) {
2549 bt.push(st.method(), st.bci(), CHECK);
2550 chunk_count++;
2551
2552 // Bail-out for deep stacks
2553 if (chunk_count >= trace_chunk_size) break;
2554 }
2555 set_depth(throwable(), chunk_count);
2556 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2557
2558 // We support the Throwable immutability protocol defined for Java 7.
2559 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2560 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2561 }
2562
2563 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2564 objArrayHandle stack_trace_array_h, TRAPS) {
2565
2566 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2567 THROW(vmSymbols::java_lang_NullPointerException());
2568 }
2569
2570 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2571
2572 if (stack_trace_array_h->length() != depth(throwable())) {
2573 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2574 }
2575
2576 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2577 BacktraceIterator iter(result, THREAD);
2578
2579 int index = 0;
2580 while (iter.repeat()) {
2581 BacktraceElement bte = iter.next(THREAD);
2582
2583 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2584
2585 if (stack_trace_element.is_null()) {
2586 THROW(vmSymbols::java_lang_NullPointerException());
2587 }
2588
2589 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2590 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2591
2592 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2593 method,
2594 bte._version,
2595 bte._bci,
2596 bte._name, CHECK);
2597 }
2598 }
2599
2600 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2601 // Allocate java.lang.StackTraceElement instance
2602 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2603 assert(k != NULL, "must be loaded in 1.4+");
2604 if (k->should_be_initialized()) {
2605 k->initialize(CHECK_0);
2606 }
2607
2608 Handle element = k->allocate_instance_handle(CHECK_0);
2609
2610 int version = method->constants()->version();
2611 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2612 return element();
2613 }
2614
2615 void java_lang_StackTraceElement::fill_in(Handle element,
2616 InstanceKlass* holder, const methodHandle& method,
2617 int version, int bci, Symbol* name, TRAPS) {
2618 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2619
2620 ResourceMark rm(THREAD);
2621 HandleMark hm(THREAD);
2622
2623 // Fill in class name
2624 Handle java_class(THREAD, holder->java_mirror());
2625 oop classname = java_lang_Class::name(java_class, CHECK);
2626 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2627 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2628
2629 oop loader = holder->class_loader();
2630 if (loader != NULL) {
2631 oop loader_name = java_lang_ClassLoader::name(loader);
2632 if (loader_name != NULL)
2633 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2634 }
2635
2636 // Fill in method name
2637 oop methodname = StringTable::intern(name, CHECK);
2638 java_lang_StackTraceElement::set_methodName(element(), methodname);
2639
2640 // Fill in module name and version
2641 ModuleEntry* module = holder->module();
2642 if (module->is_named()) {
2643 oop module_name = StringTable::intern(module->name(), CHECK);
2644 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2645 oop module_version;
2646 if (module->version() != NULL) {
2647 module_version = StringTable::intern(module->version(), CHECK);
2648 } else {
2649 module_version = NULL;
2650 }
2651 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2652 }
2653
2654 if (method() == NULL || !version_matches(method(), version)) {
2655 // The method was redefined, accurate line number information isn't available
2656 java_lang_StackTraceElement::set_fileName(element(), NULL);
2657 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2658 } else {
2659 // Fill in source file name and line number.
2660 Symbol* source = Backtrace::get_source_file_name(holder, version);
2661 oop source_file = java_lang_Class::source_file(java_class());
2662 if (source != NULL) {
2663 // Class was not redefined. We can trust its cache if set,
2664 // else we have to initialize it.
2665 if (source_file == NULL) {
2666 source_file = StringTable::intern(source, CHECK);
2667 java_lang_Class::set_source_file(java_class(), source_file);
2668 }
2669 } else {
2670 // Class was redefined. Dump the cache if it was set.
2671 if (source_file != NULL) {
2672 source_file = NULL;
2673 java_lang_Class::set_source_file(java_class(), source_file);
2674 }
2675 if (ShowHiddenFrames) {
2676 source = vmSymbols::unknown_class_name();
2677 source_file = StringTable::intern(source, CHECK);
2678 }
2679 }
2680 java_lang_StackTraceElement::set_fileName(element(), source_file);
2681
2682 int line_number = Backtrace::get_line_number(method, bci);
2683 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2684 }
2685 }
2686
2687 #if INCLUDE_JVMCI
2688 void java_lang_StackTraceElement::decode(Handle mirror, methodHandle method, int bci, Symbol*& methodname, Symbol*& filename, int& line_number) {
2689 int method_id = method->orig_method_idnum();
2690 int cpref = method->name_index();
2691 decode(mirror, method_id, method->constants()->version(), bci, cpref, methodname, filename, line_number);
2692 }
2693
2694 void java_lang_StackTraceElement::decode(Handle mirror, int method_id, int version, int bci, int cpref, Symbol*& methodname, Symbol*& filename, int& line_number) {
2695 // Fill in class name
2696 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2697 Method* method = holder->method_with_orig_idnum(method_id, version);
2698
2699 // The method can be NULL if the requested class version is gone
2700 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
2701
2702 // Fill in method name
2703 methodname = sym;
2704
2705 if (!version_matches(method, version)) {
2706 // If the method was redefined, accurate line number information isn't available
2707 filename = NULL;
2708 line_number = -1;
2709 } else {
2710 // Fill in source file name and line number.
2711 // Use a specific ik version as a holder since the mirror might
2712 // refer to a version that is now obsolete and no longer accessible
2713 // via the previous versions list.
2714 holder = holder->get_klass_version(version);
2715 assert(holder != NULL, "sanity check");
2716 Symbol* source = holder->source_file_name();
2717 if (ShowHiddenFrames && source == NULL) {
2718 source = vmSymbols::unknown_class_name();
2719 }
2720 filename = source;
2721 line_number = Backtrace::get_line_number(method, bci);
2722 }
2723 }
2724 #endif // INCLUDE_JVMCI
2725
2726 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2727 HandleMark hm(THREAD);
2728 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2729 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2730 // we should expand MemberName::name when Throwable uses StackTrace
2731 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2732 return method;
2733 }
2734
2735 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2736 // set Method* or mid/cpref
2737 HandleMark hm(THREAD);
2738 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2739 InstanceKlass* ik = method->method_holder();
2740 CallInfo info(method(), ik, CHECK);
2741 MethodHandles::init_method_MemberName(mname, info);
2742 // set bci
2743 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2744 // method may be redefined; store the version
2745 int version = method->constants()->version();
2746 assert((jushort)version == version, "version should be short");
2747 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2748 }
2749
2750 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2751 ResourceMark rm(THREAD);
2752 HandleMark hm(THREAD);
2753 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2754 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2755 InstanceKlass* holder = InstanceKlass::cast(clazz);
2756 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2757
2758 short version = stackFrame->short_field(_version_offset);
2759 short bci = stackFrame->short_field(_bci_offset);
2760 Symbol* name = method->name();
2761 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2762 }
2763
2764 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2765 macro(_memberName_offset, k, "memberName", object_signature, false); \
2766 macro(_bci_offset, k, "bci", short_signature, false)
2767
2768 void java_lang_StackFrameInfo::compute_offsets() {
2769 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2770 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2771 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2772 }
2773
2774 #if INCLUDE_CDS
2775 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2776 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2777 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2778 }
2779 #endif
2780
2781 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2782 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2783 macro(_locals_offset, k, "locals", object_array_signature, false); \
2784 macro(_operands_offset, k, "operands", object_array_signature, false); \
2785 macro(_mode_offset, k, "mode", int_signature, false)
2786
2787 void java_lang_LiveStackFrameInfo::compute_offsets() {
2788 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2789 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2790 }
2791
2792 #if INCLUDE_CDS
2793 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2794 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2795 }
2796 #endif
2797
2798 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2799 macro(override_offset, k, "override", bool_signature, false)
2800
2801 void java_lang_reflect_AccessibleObject::compute_offsets() {
2802 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2803 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2804 }
2805
2806 #if INCLUDE_CDS
2807 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2808 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2809 }
2810 #endif
2811
2812 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2813 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2814 return (jboolean) reflect->bool_field(override_offset);
2815 }
2816
2817 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2818 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2819 reflect->bool_field_put(override_offset, (int) value);
2820 }
2821
2822 #define METHOD_FIELDS_DO(macro) \
2823 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2824 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2825 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2826 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2827 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2828 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2829 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2830 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2831 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2832 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2833 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2834
2835 void java_lang_reflect_Method::compute_offsets() {
2836 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2837 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2838 }
2839
2840 #if INCLUDE_CDS
2841 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2842 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2843 }
2844 #endif
2845
2846 Handle java_lang_reflect_Method::create(TRAPS) {
2847 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2848 Klass* klass = SystemDictionary::reflect_Method_klass();
2849 // This class is eagerly initialized during VM initialization, since we keep a refence
2850 // to one of the methods
2851 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2852 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2853 }
2854
2855 oop java_lang_reflect_Method::clazz(oop reflect) {
2856 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2857 return reflect->obj_field(clazz_offset);
2858 }
2859
2860 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2861 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2862 reflect->obj_field_put(clazz_offset, value);
2863 }
2864
2865 int java_lang_reflect_Method::slot(oop reflect) {
2866 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2867 return reflect->int_field(slot_offset);
2868 }
2869
2870 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2871 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2872 reflect->int_field_put(slot_offset, value);
2873 }
2874
2875 void java_lang_reflect_Method::set_name(oop method, oop value) {
2876 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2877 method->obj_field_put(name_offset, value);
2878 }
2879
2880 oop java_lang_reflect_Method::return_type(oop method) {
2881 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2882 return method->obj_field(returnType_offset);
2883 }
2884
2885 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2886 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2887 method->obj_field_put(returnType_offset, value);
2888 }
2889
2890 oop java_lang_reflect_Method::parameter_types(oop method) {
2891 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2892 return method->obj_field(parameterTypes_offset);
2893 }
2894
2895 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2897 method->obj_field_put(parameterTypes_offset, value);
2898 }
2899
2900 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2901 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2902 method->obj_field_put(exceptionTypes_offset, value);
2903 }
2904
2905 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2906 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2907 method->int_field_put(modifiers_offset, value);
2908 }
2909
2910 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2911 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2912 method->obj_field_put(signature_offset, value);
2913 }
2914
2915 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2916 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2917 method->obj_field_put(annotations_offset, value);
2918 }
2919
2920 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2921 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2922 method->obj_field_put(parameter_annotations_offset, value);
2923 }
2924
2925 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2926 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2927 method->obj_field_put(annotation_default_offset, value);
2928 }
2929
2930 #define CONSTRUCTOR_FIELDS_DO(macro) \
2931 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2932 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2933 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2934 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2935 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2936 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2937 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2938 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2939
2940 void java_lang_reflect_Constructor::compute_offsets() {
2941 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2942 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2943 }
2944
2945 #if INCLUDE_CDS
2946 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2947 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2948 }
2949 #endif
2950
2951 Handle java_lang_reflect_Constructor::create(TRAPS) {
2952 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2953 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2954 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2955 InstanceKlass* ik = InstanceKlass::cast(k);
2956 // Ensure it is initialized
2957 ik->initialize(CHECK_NH);
2958 return ik->allocate_instance_handle(THREAD);
2959 }
2960
2961 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2962 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2963 return reflect->obj_field(clazz_offset);
2964 }
2965
2966 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2967 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2968 reflect->obj_field_put(clazz_offset, value);
2969 }
2970
2971 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2972 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2973 return constructor->obj_field(parameterTypes_offset);
2974 }
2975
2976 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2977 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2978 constructor->obj_field_put(parameterTypes_offset, value);
2979 }
2980
2981 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2982 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2983 constructor->obj_field_put(exceptionTypes_offset, value);
2984 }
2985
2986 int java_lang_reflect_Constructor::slot(oop reflect) {
2987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2988 return reflect->int_field(slot_offset);
2989 }
2990
2991 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2993 reflect->int_field_put(slot_offset, value);
2994 }
2995
2996 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2998 constructor->int_field_put(modifiers_offset, value);
2999 }
3000
3001 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3002 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3003 constructor->obj_field_put(signature_offset, value);
3004 }
3005
3006 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3008 constructor->obj_field_put(annotations_offset, value);
3009 }
3010
3011 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3012 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3013 method->obj_field_put(parameter_annotations_offset, value);
3014 }
3015
3016 #define FIELD_FIELDS_DO(macro) \
3017 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3018 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3019 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
3020 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3021 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3022 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3023 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3024
3025 void java_lang_reflect_Field::compute_offsets() {
3026 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3027 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3028 }
3029
3030 #if INCLUDE_CDS
3031 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3032 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3033 }
3034 #endif
3035
3036 Handle java_lang_reflect_Field::create(TRAPS) {
3037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3038 Symbol* name = vmSymbols::java_lang_reflect_Field();
3039 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3040 InstanceKlass* ik = InstanceKlass::cast(k);
3041 // Ensure it is initialized
3042 ik->initialize(CHECK_NH);
3043 return ik->allocate_instance_handle(THREAD);
3044 }
3045
3046 oop java_lang_reflect_Field::clazz(oop reflect) {
3047 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3048 return reflect->obj_field(clazz_offset);
3049 }
3050
3051 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3052 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3053 reflect->obj_field_put(clazz_offset, value);
3054 }
3055
3056 oop java_lang_reflect_Field::name(oop field) {
3057 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3058 return field->obj_field(name_offset);
3059 }
3060
3061 void java_lang_reflect_Field::set_name(oop field, oop value) {
3062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3063 field->obj_field_put(name_offset, value);
3064 }
3065
3066 oop java_lang_reflect_Field::type(oop field) {
3067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3068 return field->obj_field(type_offset);
3069 }
3070
3071 void java_lang_reflect_Field::set_type(oop field, oop value) {
3072 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3073 field->obj_field_put(type_offset, value);
3074 }
3075
3076 int java_lang_reflect_Field::slot(oop reflect) {
3077 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3078 return reflect->int_field(slot_offset);
3079 }
3080
3081 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3082 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3083 reflect->int_field_put(slot_offset, value);
3084 }
3085
3086 int java_lang_reflect_Field::modifiers(oop field) {
3087 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3088 return field->int_field(modifiers_offset);
3089 }
3090
3091 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3092 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3093 field->int_field_put(modifiers_offset, value);
3094 }
3095
3096 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3097 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3098 field->obj_field_put(signature_offset, value);
3099 }
3100
3101 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3102 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3103 field->obj_field_put(annotations_offset, value);
3104 }
3105
3106 #define CONSTANTPOOL_FIELDS_DO(macro) \
3107 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3108
3109 void reflect_ConstantPool::compute_offsets() {
3110 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3111 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3112 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3113 }
3114
3115 #if INCLUDE_CDS
3116 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3117 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3118 }
3119 #endif
3120
3121 #define PARAMETER_FIELDS_DO(macro) \
3122 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3123 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3124 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3125 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3126
3127 void java_lang_reflect_Parameter::compute_offsets() {
3128 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3129 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3130 }
3131
3132 #if INCLUDE_CDS
3133 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3134 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3135 }
3136 #endif
3137
3138 Handle java_lang_reflect_Parameter::create(TRAPS) {
3139 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3140 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3141 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3142 InstanceKlass* ik = InstanceKlass::cast(k);
3143 // Ensure it is initialized
3144 ik->initialize(CHECK_NH);
3145 return ik->allocate_instance_handle(THREAD);
3146 }
3147
3148 oop java_lang_reflect_Parameter::name(oop param) {
3149 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3150 return param->obj_field(name_offset);
3151 }
3152
3153 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3154 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3155 param->obj_field_put(name_offset, value);
3156 }
3157
3158 int java_lang_reflect_Parameter::modifiers(oop param) {
3159 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3160 return param->int_field(modifiers_offset);
3161 }
3162
3163 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3164 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3165 param->int_field_put(modifiers_offset, value);
3166 }
3167
3168 int java_lang_reflect_Parameter::index(oop param) {
3169 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3170 return param->int_field(index_offset);
3171 }
3172
3173 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3174 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3175 param->int_field_put(index_offset, value);
3176 }
3177
3178 oop java_lang_reflect_Parameter::executable(oop param) {
3179 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3180 return param->obj_field(executable_offset);
3181 }
3182
3183 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3184 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3185 param->obj_field_put(executable_offset, value);
3186 }
3187
3188
3189 int java_lang_Module::loader_offset;
3190 int java_lang_Module::name_offset;
3191 int java_lang_Module::_module_entry_offset = -1;
3192
3193 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3194 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3195 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3196 vmSymbols::java_lang_module_init_signature(),
3197 loader, module_name, CHECK_NH);
3198 }
3199
3200 #define MODULE_FIELDS_DO(macro) \
3201 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3202 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3203
3204 void java_lang_Module::compute_offsets() {
3205 InstanceKlass* k = SystemDictionary::Module_klass();
3206 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3207 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3208 }
3209
3210 #if INCLUDE_CDS
3211 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3212 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3213 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3214 }
3215 #endif
3216
3217 oop java_lang_Module::loader(oop module) {
3218 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3219 return module->obj_field(loader_offset);
3220 }
3221
3222 void java_lang_Module::set_loader(oop module, oop value) {
3223 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3224 module->obj_field_put(loader_offset, value);
3225 }
3226
3227 oop java_lang_Module::name(oop module) {
3228 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3229 return module->obj_field(name_offset);
3230 }
3231
3232 void java_lang_Module::set_name(oop module, oop value) {
3233 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3234 module->obj_field_put(name_offset, value);
3235 }
3236
3237 ModuleEntry* java_lang_Module::module_entry(oop module) {
3238 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3239 assert(module != NULL, "module can't be null");
3240 assert(oopDesc::is_oop(module), "module must be oop");
3241
3242 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3243 if (module_entry == NULL) {
3244 // If the inject field containing the ModuleEntry* is null then return the
3245 // class loader's unnamed module.
3246 oop loader = java_lang_Module::loader(module);
3247 Handle h_loader = Handle(Thread::current(), loader);
3248 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3249 return loader_cld->unnamed_module();
3250 }
3251 return module_entry;
3252 }
3253
3254 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3255 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3256 assert(module != NULL, "module can't be null");
3257 assert(oopDesc::is_oop(module), "module must be oop");
3258 module->address_field_put(_module_entry_offset, (address)module_entry);
3259 }
3260
3261 Handle reflect_ConstantPool::create(TRAPS) {
3262 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3263 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3264 // Ensure it is initialized
3265 k->initialize(CHECK_NH);
3266 return k->allocate_instance_handle(THREAD);
3267 }
3268
3269
3270 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3271 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3272 oop mirror = value->pool_holder()->java_mirror();
3273 // Save the mirror to get back the constant pool.
3274 reflect->obj_field_put(_oop_offset, mirror);
3275 }
3276
3277 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3278 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3279
3280 oop mirror = reflect->obj_field(_oop_offset);
3281 Klass* k = java_lang_Class::as_Klass(mirror);
3282 assert(k->is_instance_klass(), "Must be");
3283
3284 // Get the constant pool back from the klass. Since class redefinition
3285 // merges the new constant pool into the old, this is essentially the
3286 // same constant pool as the original. If constant pool merging is
3287 // no longer done in the future, this will have to change to save
3288 // the original.
3289 return InstanceKlass::cast(k)->constants();
3290 }
3291
3292 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3293 macro(_base_offset, k, "base", object_signature, false)
3294
3295 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3296 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3297 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3298 }
3299
3300 #if INCLUDE_CDS
3301 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3302 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3303 }
3304 #endif
3305
3306 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3307 Klass* k = SystemDictionary::box_klass(type);
3308 if (k == NULL) return NULL;
3309 InstanceKlass* ik = InstanceKlass::cast(k);
3310 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3311 return ik->allocate_instance(THREAD);
3312 }
3313
3314
3315 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3316 oop box = initialize_and_allocate(type, CHECK_0);
3317 if (box == NULL) return NULL;
3318 switch (type) {
3319 case T_BOOLEAN:
3320 box->bool_field_put(value_offset, value->z);
3321 break;
3322 case T_CHAR:
3323 box->char_field_put(value_offset, value->c);
3324 break;
3325 case T_FLOAT:
3326 box->float_field_put(value_offset, value->f);
3327 break;
3328 case T_DOUBLE:
3329 box->double_field_put(long_value_offset, value->d);
3330 break;
3331 case T_BYTE:
3332 box->byte_field_put(value_offset, value->b);
3333 break;
3334 case T_SHORT:
3335 box->short_field_put(value_offset, value->s);
3336 break;
3337 case T_INT:
3338 box->int_field_put(value_offset, value->i);
3339 break;
3340 case T_LONG:
3341 box->long_field_put(long_value_offset, value->j);
3342 break;
3343 default:
3344 return NULL;
3345 }
3346 return box;
3347 }
3348
3349
3350 BasicType java_lang_boxing_object::basic_type(oop box) {
3351 if (box == NULL) return T_ILLEGAL;
3352 BasicType type = SystemDictionary::box_klass_type(box->klass());
3353 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3354 return T_ILLEGAL;
3355 return type;
3356 }
3357
3358
3359 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3360 BasicType type = SystemDictionary::box_klass_type(box->klass());
3361 switch (type) {
3362 case T_BOOLEAN:
3363 value->z = box->bool_field(value_offset);
3364 break;
3365 case T_CHAR:
3366 value->c = box->char_field(value_offset);
3367 break;
3368 case T_FLOAT:
3369 value->f = box->float_field(value_offset);
3370 break;
3371 case T_DOUBLE:
3372 value->d = box->double_field(long_value_offset);
3373 break;
3374 case T_BYTE:
3375 value->b = box->byte_field(value_offset);
3376 break;
3377 case T_SHORT:
3378 value->s = box->short_field(value_offset);
3379 break;
3380 case T_INT:
3381 value->i = box->int_field(value_offset);
3382 break;
3383 case T_LONG:
3384 value->j = box->long_field(long_value_offset);
3385 break;
3386 default:
3387 return T_ILLEGAL;
3388 } // end switch
3389 return type;
3390 }
3391
3392
3393 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3394 BasicType type = SystemDictionary::box_klass_type(box->klass());
3395 switch (type) {
3396 case T_BOOLEAN:
3397 box->bool_field_put(value_offset, value->z);
3398 break;
3399 case T_CHAR:
3400 box->char_field_put(value_offset, value->c);
3401 break;
3402 case T_FLOAT:
3403 box->float_field_put(value_offset, value->f);
3404 break;
3405 case T_DOUBLE:
3406 box->double_field_put(long_value_offset, value->d);
3407 break;
3408 case T_BYTE:
3409 box->byte_field_put(value_offset, value->b);
3410 break;
3411 case T_SHORT:
3412 box->short_field_put(value_offset, value->s);
3413 break;
3414 case T_INT:
3415 box->int_field_put(value_offset, value->i);
3416 break;
3417 case T_LONG:
3418 box->long_field_put(long_value_offset, value->j);
3419 break;
3420 default:
3421 return T_ILLEGAL;
3422 } // end switch
3423 return type;
3424 }
3425
3426
3427 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3428 switch (type) {
3429 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3430 case T_CHAR: st->print("%d", value->c); break;
3431 case T_BYTE: st->print("%d", value->b); break;
3432 case T_SHORT: st->print("%d", value->s); break;
3433 case T_INT: st->print("%d", value->i); break;
3434 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3435 case T_FLOAT: st->print("%f", value->f); break;
3436 case T_DOUBLE: st->print("%lf", value->d); break;
3437 default: st->print("type %d?", type); break;
3438 }
3439 }
3440
3441 // Support for java_lang_ref_Reference
3442
3443 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3444 assert(obj != NULL, "sanity");
3445 if (offset != java_lang_ref_Reference::referent_offset) {
3446 return false;
3447 }
3448
3449 Klass* k = obj->klass();
3450 if (!k->is_instance_klass()) {
3451 return false;
3452 }
3453
3454 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3455 bool is_reference = ik->reference_type() != REF_NONE;
3456 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3457 return is_reference;
3458 }
3459
3460 // Support for java_lang_ref_SoftReference
3461 //
3462
3463 #define SOFTREFERENCE_FIELDS_DO(macro) \
3464 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3465 macro(static_clock_offset, k, "clock", long_signature, true)
3466
3467 void java_lang_ref_SoftReference::compute_offsets() {
3468 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3469 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3470 }
3471
3472 #if INCLUDE_CDS
3473 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3474 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3475 }
3476 #endif
3477
3478 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3479 return ref->long_field(timestamp_offset);
3480 }
3481
3482 jlong java_lang_ref_SoftReference::clock() {
3483 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3484 oop base = ik->static_field_base_raw();
3485 return base->long_field(static_clock_offset);
3486 }
3487
3488 void java_lang_ref_SoftReference::set_clock(jlong value) {
3489 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3490 oop base = ik->static_field_base_raw();
3491 base->long_field_put(static_clock_offset, value);
3492 }
3493
3494 // Support for java_lang_invoke_DirectMethodHandle
3495
3496 int java_lang_invoke_DirectMethodHandle::_member_offset;
3497
3498 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3499 oop member_name = NULL;
3500 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3501 "a DirectMethodHandle oop is expected");
3502 return dmh->obj_field(member_offset_in_bytes());
3503 }
3504
3505 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3506 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3507
3508 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3509 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3510 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3511 }
3512
3513 #if INCLUDE_CDS
3514 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3515 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3516 }
3517 #endif
3518
3519 // Support for java_lang_invoke_MethodHandle
3520
3521 int java_lang_invoke_MethodHandle::_type_offset;
3522 int java_lang_invoke_MethodHandle::_form_offset;
3523
3524 int java_lang_invoke_MemberName::_clazz_offset;
3525 int java_lang_invoke_MemberName::_name_offset;
3526 int java_lang_invoke_MemberName::_type_offset;
3527 int java_lang_invoke_MemberName::_flags_offset;
3528 int java_lang_invoke_MemberName::_method_offset;
3529 int java_lang_invoke_MemberName::_vmindex_offset;
3530
3531 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3532 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3533
3534 int java_lang_invoke_LambdaForm::_vmentry_offset;
3535
3536 #define METHODHANDLE_FIELDS_DO(macro) \
3537 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3538 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3539
3540 void java_lang_invoke_MethodHandle::compute_offsets() {
3541 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3542 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3543 }
3544
3545 #if INCLUDE_CDS
3546 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3547 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3548 }
3549 #endif
3550
3551 #define MEMBERNAME_FIELDS_DO(macro) \
3552 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3553 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3554 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3555 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3556 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3557
3558 void java_lang_invoke_MemberName::compute_offsets() {
3559 InstanceKlass* k = SystemDictionary::MemberName_klass();
3560 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3561 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3562 }
3563
3564 #if INCLUDE_CDS
3565 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3566 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3567 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3568 }
3569 #endif
3570
3571 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3572 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3573 assert(k != NULL, "jdk mismatch");
3574 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3575 }
3576
3577 #if INCLUDE_CDS
3578 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3579 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3580 }
3581 #endif
3582
3583 #define LAMBDAFORM_FIELDS_DO(macro) \
3584 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3585
3586 void java_lang_invoke_LambdaForm::compute_offsets() {
3587 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3588 assert (k != NULL, "jdk mismatch");
3589 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3590 }
3591
3592 #if INCLUDE_CDS
3593 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3594 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3595 }
3596 #endif
3597
3598 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3599 return obj != NULL && is_subclass(obj->klass());
3600 }
3601
3602
3603 oop java_lang_invoke_MethodHandle::type(oop mh) {
3604 return mh->obj_field(_type_offset);
3605 }
3606
3607 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3608 mh->obj_field_put(_type_offset, mtype);
3609 }
3610
3611 oop java_lang_invoke_MethodHandle::form(oop mh) {
3612 assert(_form_offset != 0, "");
3613 return mh->obj_field(_form_offset);
3614 }
3615
3616 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3617 assert(_form_offset != 0, "");
3618 mh->obj_field_put(_form_offset, lform);
3619 }
3620
3621 /// MemberName accessors
3622
3623 oop java_lang_invoke_MemberName::clazz(oop mname) {
3624 assert(is_instance(mname), "wrong type");
3625 return mname->obj_field(_clazz_offset);
3626 }
3627
3628 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3629 assert(is_instance(mname), "wrong type");
3630 mname->obj_field_put(_clazz_offset, clazz);
3631 }
3632
3633 oop java_lang_invoke_MemberName::name(oop mname) {
3634 assert(is_instance(mname), "wrong type");
3635 return mname->obj_field(_name_offset);
3636 }
3637
3638 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3639 assert(is_instance(mname), "wrong type");
3640 mname->obj_field_put(_name_offset, name);
3641 }
3642
3643 oop java_lang_invoke_MemberName::type(oop mname) {
3644 assert(is_instance(mname), "wrong type");
3645 return mname->obj_field(_type_offset);
3646 }
3647
3648 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3649 assert(is_instance(mname), "wrong type");
3650 mname->obj_field_put(_type_offset, type);
3651 }
3652
3653 int java_lang_invoke_MemberName::flags(oop mname) {
3654 assert(is_instance(mname), "wrong type");
3655 return mname->int_field(_flags_offset);
3656 }
3657
3658 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3659 assert(is_instance(mname), "wrong type");
3660 mname->int_field_put(_flags_offset, flags);
3661 }
3662
3663
3664 // Return vmtarget from ResolvedMethodName method field through indirection
3665 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3666 assert(is_instance(mname), "wrong type");
3667 oop method = mname->obj_field(_method_offset);
3668 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3669 }
3670
3671 bool java_lang_invoke_MemberName::is_method(oop mname) {
3672 assert(is_instance(mname), "must be MemberName");
3673 return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0;
3674 }
3675
3676 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3677 assert(is_instance(mname), "wrong type");
3678 mname->obj_field_put(_method_offset, resolved_method);
3679 }
3680
3681 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3682 assert(is_instance(mname), "wrong type");
3683 return (intptr_t) mname->address_field(_vmindex_offset);
3684 }
3685
3686 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3687 assert(is_instance(mname), "wrong type");
3688 mname->address_field_put(_vmindex_offset, (address) index);
3689 }
3690
3691
3692 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3693 assert(is_instance(resolved_method), "wrong type");
3694 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3695 assert(m->is_method(), "must be");
3696 return m;
3697 }
3698
3699 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3700 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3701 assert(is_instance(resolved_method), "wrong type");
3702 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3703 }
3704
3705 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
3706 assert(is_instance(resolved_method), "wrong type");
3707 resolved_method->obj_field_put(_vmholder_offset, holder);
3708 }
3709
3710 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3711 const Method* method = m();
3712
3713 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3714 oop resolved_method = ResolvedMethodTable::find_method(method);
3715 if (resolved_method != NULL) {
3716 return resolved_method;
3717 }
3718
3719 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3720 if (!k->is_initialized()) {
3721 k->initialize(CHECK_NULL);
3722 }
3723
3724 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3725
3726 NoSafepointVerifier nsv;
3727
3728 if (method->is_old()) {
3729 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
3730 method->get_new_method();
3731 }
3732
3733 InstanceKlass* holder = method->method_holder();
3734
3735 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
3736 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3737 // distinct loaders) to ensure the metadata is kept alive.
3738 // This mirror may be different than the one in clazz field.
3739 set_vmholder(new_resolved_method, holder->java_mirror());
3740
3741 // Set flag in class to indicate this InstanceKlass has entries in the table
3742 // to avoid walking table during redefinition if none of the redefined classes
3743 // have any membernames in the table.
3744 holder->set_has_resolved_methods();
3745
3746 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
3747 }
3748
3749 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3750 assert(is_instance(lform), "wrong type");
3751 return lform->obj_field(_vmentry_offset);
3752 }
3753
3754
3755 // Support for java_lang_invoke_MethodType
3756
3757 int java_lang_invoke_MethodType::_rtype_offset;
3758 int java_lang_invoke_MethodType::_ptypes_offset;
3759
3760 #define METHODTYPE_FIELDS_DO(macro) \
3761 macro(_rtype_offset, k, "rtype", class_signature, false); \
3762 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3763
3764 void java_lang_invoke_MethodType::compute_offsets() {
3765 InstanceKlass* k = SystemDictionary::MethodType_klass();
3766 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3767 }
3768
3769 #if INCLUDE_CDS
3770 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3771 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3772 }
3773 #endif
3774
3775 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3776 st->print("(");
3777 objArrayOop pts = ptypes(mt);
3778 for (int i = 0, limit = pts->length(); i < limit; i++) {
3779 java_lang_Class::print_signature(pts->obj_at(i), st);
3780 }
3781 st->print(")");
3782 java_lang_Class::print_signature(rtype(mt), st);
3783 }
3784
3785 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
3786 ResourceMark rm;
3787 stringStream buffer(128);
3788 print_signature(mt, &buffer);
3789 const char* sigstr = buffer.base();
3790 int siglen = (int) buffer.size();
3791 Symbol *name;
3792 if (!intern_if_not_found) {
3793 name = SymbolTable::probe(sigstr, siglen);
3794 } else {
3795 name = SymbolTable::new_symbol(sigstr, siglen);
3796 }
3797 return name;
3798 }
3799
3800 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3801 if (oopDesc::equals(mt1, mt2))
3802 return true;
3803 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3804 return false;
3805 if (ptype_count(mt1) != ptype_count(mt2))
3806 return false;
3807 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3808 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3809 return false;
3810 }
3811 return true;
3812 }
3813
3814 oop java_lang_invoke_MethodType::rtype(oop mt) {
3815 assert(is_instance(mt), "must be a MethodType");
3816 return mt->obj_field(_rtype_offset);
3817 }
3818
3819 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3820 assert(is_instance(mt), "must be a MethodType");
3821 return (objArrayOop) mt->obj_field(_ptypes_offset);
3822 }
3823
3824 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3825 return ptypes(mt)->obj_at(idx);
3826 }
3827
3828 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3829 return ptypes(mt)->length();
3830 }
3831
3832 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3833 objArrayOop pts = ptypes(mt);
3834 int count = pts->length();
3835 int slots = 0;
3836 for (int i = 0; i < count; i++) {
3837 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3838 slots += type2size[bt];
3839 }
3840 return slots;
3841 }
3842
3843 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3844 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3845 return type2size[bt];
3846 }
3847
3848
3849 // Support for java_lang_invoke_CallSite
3850
3851 int java_lang_invoke_CallSite::_target_offset;
3852 int java_lang_invoke_CallSite::_context_offset;
3853
3854 #define CALLSITE_FIELDS_DO(macro) \
3855 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3856 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3857
3858 void java_lang_invoke_CallSite::compute_offsets() {
3859 InstanceKlass* k = SystemDictionary::CallSite_klass();
3860 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3861 }
3862
3863 #if INCLUDE_CDS
3864 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3865 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3866 }
3867 #endif
3868
3869 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3870 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3871
3872 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3873 return dep_oop;
3874 }
3875
3876 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3877
3878 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3879 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3880
3881 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3882 InstanceKlass* k = SystemDictionary::Context_klass();
3883 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3884 }
3885
3886 #if INCLUDE_CDS
3887 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3888 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3889 }
3890 #endif
3891
3892 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3893 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3894 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3895 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3896 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3897 return dep_ctx;
3898 }
3899
3900 // Support for java_security_AccessControlContext
3901
3902 int java_security_AccessControlContext::_context_offset = 0;
3903 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3904 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3905 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3906
3907 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3908 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3909 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3910 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3911 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3912
3913 void java_security_AccessControlContext::compute_offsets() {
3914 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3915 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3916 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3917 }
3918
3919 #if INCLUDE_CDS
3920 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3921 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3922 }
3923 #endif
3924
3925 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3926 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3927 // Ensure klass is initialized
3928 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3929 // Allocate result
3930 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3931 // Fill in values
3932 result->obj_field_put(_context_offset, context());
3933 result->obj_field_put(_privilegedContext_offset, privileged_context());
3934 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3935 // whitelist AccessControlContexts created by the JVM if present
3936 if (_isAuthorized_offset != -1) {
3937 result->bool_field_put(_isAuthorized_offset, true);
3938 }
3939 return result;
3940 }
3941
3942
3943 // Support for java_lang_ClassLoader
3944
3945 bool java_lang_ClassLoader::offsets_computed = false;
3946 int java_lang_ClassLoader::_loader_data_offset = -1;
3947 int java_lang_ClassLoader::parallelCapable_offset = -1;
3948 int java_lang_ClassLoader::name_offset = -1;
3949 int java_lang_ClassLoader::nameAndId_offset = -1;
3950 int java_lang_ClassLoader::unnamedModule_offset = -1;
3951
3952 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3953 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3954 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3955 }
3956
3957 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3958 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3959 return RawAccess<>::load_at(loader, _loader_data_offset);
3960 }
3961
3962 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3963 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3964 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3965 }
3966
3967 #define CLASSLOADER_FIELDS_DO(macro) \
3968 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3969 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3970 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3971 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3972 macro(parent_offset, k1, "parent", classloader_signature, false)
3973
3974 void java_lang_ClassLoader::compute_offsets() {
3975 assert(!offsets_computed, "offsets should be initialized only once");
3976 offsets_computed = true;
3977
3978 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3979 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3980
3981 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3982 }
3983
3984 #if INCLUDE_CDS
3985 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3986 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3987 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3988 }
3989 #endif
3990
3991 oop java_lang_ClassLoader::parent(oop loader) {
3992 assert(is_instance(loader), "loader must be oop");
3993 return loader->obj_field(parent_offset);
3994 }
3995
3996 // Returns the name field of this class loader. If the name field has not
3997 // been set, null will be returned.
3998 oop java_lang_ClassLoader::name(oop loader) {
3999 assert(is_instance(loader), "loader must be oop");
4000 return loader->obj_field(name_offset);
4001 }
4002
4003 // Returns the nameAndId field of this class loader. The format is
4004 // as follows:
4005 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4006 // If the defining loader has no name then <qualified-class-name> @<id>
4007 // If built-in loader, then omit '@<id>' as there is only one instance.
4008 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4009 oop java_lang_ClassLoader::nameAndId(oop loader) {
4010 assert(is_instance(loader), "loader must be oop");
4011 return loader->obj_field(nameAndId_offset);
4012 }
4013
4014 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4015 assert(is_instance(loader), "loader must be oop");
4016 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
4017 oop acl = loader;
4018 debug_only(jint loop_count = 0);
4019 // This loop taken verbatim from ClassLoader.java:
4020 do {
4021 acl = parent(acl);
4022 if (oopDesc::equals(cl, acl)) {
4023 return true;
4024 }
4025 assert(++loop_count > 0, "loop_count overflow");
4026 } while (acl != NULL);
4027 return false;
4028 }
4029
4030 bool java_lang_ClassLoader::is_instance(oop obj) {
4031 return obj != NULL && is_subclass(obj->klass());
4032 }
4033
4034
4035 // For class loader classes, parallelCapable defined
4036 // based on non-null field
4037 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4038 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4039 if (parallelCapable_offset == -1) {
4040 // Default for backward compatibility is false
4041 return false;
4042 }
4043 return (class_loader->obj_field(parallelCapable_offset) != NULL);
4044 }
4045
4046 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4047 // Fix for 4474172; see evaluation for more details
4048 loader = non_reflection_class_loader(loader);
4049
4050 oop cl = SystemDictionary::java_system_loader();
4051 while(cl != NULL) {
4052 if (oopDesc::equals(cl, loader)) return true;
4053 cl = parent(cl);
4054 }
4055 return false;
4056 }
4057
4058 // Return true if this is one of the class loaders associated with
4059 // the generated bytecodes for reflection.
4060 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4061 if (loader != NULL) {
4062 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4063 // This might be null in non-1.4 JDKs
4064 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4065 }
4066 return false;
4067 }
4068
4069 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4070 // See whether this is one of the class loaders associated with
4071 // the generated bytecodes for reflection, and if so, "magically"
4072 // delegate to its parent to prevent class loading from occurring
4073 // in places where applications using reflection didn't expect it.
4074 if (is_reflection_class_loader(loader)) {
4075 return parent(loader);
4076 }
4077 return loader;
4078 }
4079
4080 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4081 assert(is_instance(loader), "loader must be oop");
4082 return loader->obj_field(unnamedModule_offset);
4083 }
4084
4085 // Support for java_lang_System
4086 //
4087 #define SYSTEM_FIELDS_DO(macro) \
4088 macro(static_in_offset, k, "in", input_stream_signature, true); \
4089 macro(static_out_offset, k, "out", print_stream_signature, true); \
4090 macro(static_err_offset, k, "err", print_stream_signature, true); \
4091 macro(static_security_offset, k, "security", security_manager_signature, true)
4092
4093 void java_lang_System::compute_offsets() {
4094 InstanceKlass* k = SystemDictionary::System_klass();
4095 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4096 }
4097
4098 #if INCLUDE_CDS
4099 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4100 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4101 }
4102 #endif
4103
4104 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4105 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4106 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4107
4108 // Support for jdk_internal_misc_UnsafeConstants
4109 //
4110 class UnsafeConstantsFixup : public FieldClosure {
4111 private:
4112 int _address_size;
4113 int _page_size;
4114 bool _big_endian;
4115 bool _use_unaligned_access;
4116 public:
4117 UnsafeConstantsFixup() {
4118 // round up values for all static final fields
4119 _address_size = sizeof(void*);
4120 _page_size = os::vm_page_size();
4121 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4122 _use_unaligned_access = UseUnalignedAccesses;
4123 }
4124
4125 void do_field(fieldDescriptor* fd) {
4126 oop mirror = fd->field_holder()->java_mirror();
4127 assert(mirror != NULL, "UnsafeConstants must have mirror already");
4128 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4129 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4130 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4131 if (fd->name() == vmSymbols::address_size_name()) {
4132 mirror->int_field_put(fd->offset(), _address_size);
4133 } else if (fd->name() == vmSymbols::page_size_name()) {
4134 mirror->int_field_put(fd->offset(), _page_size);
4135 } else if (fd->name() == vmSymbols::big_endian_name()) {
4136 mirror->bool_field_put(fd->offset(), _big_endian);
4137 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4138 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4139 } else {
4140 assert(false, "unexpected UnsafeConstants field");
4141 }
4142 }
4143 };
4144
4145 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4146 UnsafeConstantsFixup fixup;
4147 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4148 }
4149
4150 int java_lang_Class::_klass_offset;
4151 int java_lang_Class::_array_klass_offset;
4152 int java_lang_Class::_oop_size_offset;
4153 int java_lang_Class::_static_oop_field_count_offset;
4154 int java_lang_Class::_class_loader_offset;
4155 int java_lang_Class::_module_offset;
4156 int java_lang_Class::_protection_domain_offset;
4157 int java_lang_Class::_component_mirror_offset;
4158 int java_lang_Class::_inline_mirror_offset;
4159 int java_lang_Class::_indirect_mirror_offset;
4160 int java_lang_Class::_init_lock_offset;
4161 int java_lang_Class::_signers_offset;
4162 int java_lang_Class::_name_offset;
4163 int java_lang_Class::_source_file_offset;
4164 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4165 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4166 int java_lang_Throwable::backtrace_offset;
4167 int java_lang_Throwable::detailMessage_offset;
4168 int java_lang_Throwable::stackTrace_offset;
4169 int java_lang_Throwable::depth_offset;
4170 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4171 int java_lang_reflect_AccessibleObject::override_offset;
4172 int java_lang_reflect_Method::clazz_offset;
4173 int java_lang_reflect_Method::name_offset;
4174 int java_lang_reflect_Method::returnType_offset;
4175 int java_lang_reflect_Method::parameterTypes_offset;
4176 int java_lang_reflect_Method::exceptionTypes_offset;
4177 int java_lang_reflect_Method::slot_offset;
4178 int java_lang_reflect_Method::modifiers_offset;
4179 int java_lang_reflect_Method::signature_offset;
4180 int java_lang_reflect_Method::annotations_offset;
4181 int java_lang_reflect_Method::parameter_annotations_offset;
4182 int java_lang_reflect_Method::annotation_default_offset;
4183 int java_lang_reflect_Constructor::clazz_offset;
4184 int java_lang_reflect_Constructor::parameterTypes_offset;
4185 int java_lang_reflect_Constructor::exceptionTypes_offset;
4186 int java_lang_reflect_Constructor::slot_offset;
4187 int java_lang_reflect_Constructor::modifiers_offset;
4188 int java_lang_reflect_Constructor::signature_offset;
4189 int java_lang_reflect_Constructor::annotations_offset;
4190 int java_lang_reflect_Constructor::parameter_annotations_offset;
4191 int java_lang_reflect_Field::clazz_offset;
4192 int java_lang_reflect_Field::name_offset;
4193 int java_lang_reflect_Field::type_offset;
4194 int java_lang_reflect_Field::slot_offset;
4195 int java_lang_reflect_Field::modifiers_offset;
4196 int java_lang_reflect_Field::signature_offset;
4197 int java_lang_reflect_Field::annotations_offset;
4198 int java_lang_reflect_Parameter::name_offset;
4199 int java_lang_reflect_Parameter::modifiers_offset;
4200 int java_lang_reflect_Parameter::index_offset;
4201 int java_lang_reflect_Parameter::executable_offset;
4202 int java_lang_boxing_object::value_offset;
4203 int java_lang_boxing_object::long_value_offset;
4204 int java_lang_ref_Reference::referent_offset;
4205 int java_lang_ref_Reference::queue_offset;
4206 int java_lang_ref_Reference::next_offset;
4207 int java_lang_ref_Reference::discovered_offset;
4208 int java_lang_ref_SoftReference::timestamp_offset;
4209 int java_lang_ref_SoftReference::static_clock_offset;
4210 int java_lang_ClassLoader::parent_offset;
4211 int java_lang_System::static_in_offset;
4212 int java_lang_System::static_out_offset;
4213 int java_lang_System::static_err_offset;
4214 int java_lang_System::static_security_offset;
4215 int java_lang_StackTraceElement::methodName_offset;
4216 int java_lang_StackTraceElement::fileName_offset;
4217 int java_lang_StackTraceElement::lineNumber_offset;
4218 int java_lang_StackTraceElement::moduleName_offset;
4219 int java_lang_StackTraceElement::moduleVersion_offset;
4220 int java_lang_StackTraceElement::classLoaderName_offset;
4221 int java_lang_StackTraceElement::declaringClass_offset;
4222 int java_lang_StackTraceElement::declaringClassObject_offset;
4223 int java_lang_StackFrameInfo::_memberName_offset;
4224 int java_lang_StackFrameInfo::_bci_offset;
4225 int java_lang_StackFrameInfo::_version_offset;
4226 int java_lang_LiveStackFrameInfo::_monitors_offset;
4227 int java_lang_LiveStackFrameInfo::_locals_offset;
4228 int java_lang_LiveStackFrameInfo::_operands_offset;
4229 int java_lang_LiveStackFrameInfo::_mode_offset;
4230 int java_lang_AssertionStatusDirectives::classes_offset;
4231 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4232 int java_lang_AssertionStatusDirectives::packages_offset;
4233 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4234 int java_lang_AssertionStatusDirectives::deflt_offset;
4235 int java_nio_Buffer::_limit_offset;
4236 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4237 int reflect_ConstantPool::_oop_offset;
4238 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4239 int java_lang_Integer_IntegerCache::_static_cache_offset;
4240 int java_lang_Long_LongCache::_static_cache_offset;
4241 int java_lang_Character_CharacterCache::_static_cache_offset;
4242 int java_lang_Short_ShortCache::_static_cache_offset;
4243 int java_lang_Byte_ByteCache::_static_cache_offset;
4244 int java_lang_Boolean::_static_TRUE_offset;
4245 int java_lang_Boolean::_static_FALSE_offset;
4246
4247
4248
4249 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4250 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4251 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4252 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4253 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4254 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4255 macro(methodName_offset, k, "methodName", string_signature, false); \
4256 macro(fileName_offset, k, "fileName", string_signature, false); \
4257 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4258
4259 // Support for java_lang_StackTraceElement
4260 void java_lang_StackTraceElement::compute_offsets() {
4261 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4262 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4263 }
4264
4265 #if INCLUDE_CDS
4266 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4267 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4268 }
4269 #endif
4270
4271 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4272 element->obj_field_put(fileName_offset, value);
4273 }
4274
4275 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4276 element->obj_field_put(declaringClass_offset, value);
4277 }
4278
4279 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4280 element->obj_field_put(methodName_offset, value);
4281 }
4282
4283 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4284 element->int_field_put(lineNumber_offset, value);
4285 }
4286
4287 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4288 element->obj_field_put(moduleName_offset, value);
4289 }
4290
4291 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4292 element->obj_field_put(moduleVersion_offset, value);
4293 }
4294
4295 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4296 element->obj_field_put(classLoaderName_offset, value);
4297 }
4298
4299 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4300 element->obj_field_put(declaringClassObject_offset, value);
4301 }
4302
4303 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4304 element->short_field_put(_version_offset, value);
4305 }
4306
4307 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4308 element->int_field_put(_bci_offset, value);
4309 }
4310
4311 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4312 element->obj_field_put(_monitors_offset, value);
4313 }
4314
4315 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4316 element->obj_field_put(_locals_offset, value);
4317 }
4318
4319 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4320 element->obj_field_put(_operands_offset, value);
4321 }
4322
4323 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4324 element->int_field_put(_mode_offset, value);
4325 }
4326
4327 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4328 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4329 macro(classes_offset, k, "classes", string_array_signature, false); \
4330 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4331 macro(packages_offset, k, "packages", string_array_signature, false); \
4332 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4333 macro(deflt_offset, k, "deflt", bool_signature, false)
4334
4335 void java_lang_AssertionStatusDirectives::compute_offsets() {
4336 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4337 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4338 }
4339
4340 #if INCLUDE_CDS
4341 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4342 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4343 }
4344 #endif
4345
4346 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4347 o->obj_field_put(classes_offset, val);
4348 }
4349
4350 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4351 o->obj_field_put(classEnabled_offset, val);
4352 }
4353
4354 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4355 o->obj_field_put(packages_offset, val);
4356 }
4357
4358 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4359 o->obj_field_put(packageEnabled_offset, val);
4360 }
4361
4362 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4363 o->bool_field_put(deflt_offset, val);
4364 }
4365
4366
4367 // Support for intrinsification of java.nio.Buffer.checkIndex
4368 int java_nio_Buffer::limit_offset() {
4369 return _limit_offset;
4370 }
4371
4372 #define BUFFER_FIELDS_DO(macro) \
4373 macro(_limit_offset, k, "limit", int_signature, false)
4374
4375 void java_nio_Buffer::compute_offsets() {
4376 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4377 assert(k != NULL, "must be loaded in 1.4+");
4378 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4379 }
4380
4381 #if INCLUDE_CDS
4382 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4383 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4384 }
4385 #endif
4386
4387 #define AOS_FIELDS_DO(macro) \
4388 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4389
4390 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4391 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4392 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4393 }
4394
4395 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4396 assert(_owner_offset != 0, "Must be initialized");
4397 return obj->obj_field(_owner_offset);
4398 }
4399
4400 #if INCLUDE_CDS
4401 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4402 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4403 }
4404 #endif
4405
4406 #define INTEGER_CACHE_FIELDS_DO(macro) \
4407 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4408
4409 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4410 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4411 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4412 }
4413
4414 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4415 oop base = ik->static_field_base_raw();
4416 return objArrayOop(base->obj_field(_static_cache_offset));
4417 }
4418
4419 Symbol* java_lang_Integer_IntegerCache::symbol() {
4420 return vmSymbols::java_lang_Integer_IntegerCache();
4421 }
4422
4423 #if INCLUDE_CDS
4424 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
4425 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4426 }
4427 #endif
4428 #undef INTEGER_CACHE_FIELDS_DO
4429
4430 jint java_lang_Integer::value(oop obj) {
4431 jvalue v;
4432 java_lang_boxing_object::get_value(obj, &v);
4433 return v.i;
4434 }
4435
4436 #define LONG_CACHE_FIELDS_DO(macro) \
4437 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
4438
4439 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
4440 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4441 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4442 }
4443
4444 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
4445 oop base = ik->static_field_base_raw();
4446 return objArrayOop(base->obj_field(_static_cache_offset));
4447 }
4448
4449 Symbol* java_lang_Long_LongCache::symbol() {
4450 return vmSymbols::java_lang_Long_LongCache();
4451 }
4452
4453 #if INCLUDE_CDS
4454 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
4455 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4456 }
4457 #endif
4458 #undef LONG_CACHE_FIELDS_DO
4459
4460 jlong java_lang_Long::value(oop obj) {
4461 jvalue v;
4462 java_lang_boxing_object::get_value(obj, &v);
4463 return v.j;
4464 }
4465
4466 #define CHARACTER_CACHE_FIELDS_DO(macro) \
4467 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
4468
4469 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
4470 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4471 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4472 }
4473
4474 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
4475 oop base = ik->static_field_base_raw();
4476 return objArrayOop(base->obj_field(_static_cache_offset));
4477 }
4478
4479 Symbol* java_lang_Character_CharacterCache::symbol() {
4480 return vmSymbols::java_lang_Character_CharacterCache();
4481 }
4482
4483 #if INCLUDE_CDS
4484 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
4485 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4486 }
4487 #endif
4488 #undef CHARACTER_CACHE_FIELDS_DO
4489
4490 jchar java_lang_Character::value(oop obj) {
4491 jvalue v;
4492 java_lang_boxing_object::get_value(obj, &v);
4493 return v.c;
4494 }
4495
4496 #define SHORT_CACHE_FIELDS_DO(macro) \
4497 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
4498
4499 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
4500 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4501 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4502 }
4503
4504 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
4505 oop base = ik->static_field_base_raw();
4506 return objArrayOop(base->obj_field(_static_cache_offset));
4507 }
4508
4509 Symbol* java_lang_Short_ShortCache::symbol() {
4510 return vmSymbols::java_lang_Short_ShortCache();
4511 }
4512
4513 #if INCLUDE_CDS
4514 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
4515 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4516 }
4517 #endif
4518 #undef SHORT_CACHE_FIELDS_DO
4519
4520 jshort java_lang_Short::value(oop obj) {
4521 jvalue v;
4522 java_lang_boxing_object::get_value(obj, &v);
4523 return v.s;
4524 }
4525
4526 #define BYTE_CACHE_FIELDS_DO(macro) \
4527 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
4528
4529 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
4530 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4531 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4532 }
4533
4534 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
4535 oop base = ik->static_field_base_raw();
4536 return objArrayOop(base->obj_field(_static_cache_offset));
4537 }
4538
4539 Symbol* java_lang_Byte_ByteCache::symbol() {
4540 return vmSymbols::java_lang_Byte_ByteCache();
4541 }
4542
4543 #if INCLUDE_CDS
4544 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
4545 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4546 }
4547 #endif
4548 #undef BYTE_CACHE_FIELDS_DO
4549
4550 jbyte java_lang_Byte::value(oop obj) {
4551 jvalue v;
4552 java_lang_boxing_object::get_value(obj, &v);
4553 return v.b;
4554 }
4555 #define BOOLEAN_FIELDS_DO(macro) \
4556 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
4557 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
4558
4559
4560 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
4561 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4562 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4563 }
4564
4565 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
4566 oop base = ik->static_field_base_raw();
4567 return base->obj_field(_static_TRUE_offset);
4568 }
4569
4570 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
4571 oop base = ik->static_field_base_raw();
4572 return base->obj_field(_static_FALSE_offset);
4573 }
4574
4575 Symbol* java_lang_Boolean::symbol() {
4576 return vmSymbols::java_lang_Boolean();
4577 }
4578
4579 #if INCLUDE_CDS
4580 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
4581 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4582 }
4583 #endif
4584 #undef BOOLEAN_CACHE_FIELDS_DO
4585
4586 jboolean java_lang_Boolean::value(oop obj) {
4587 jvalue v;
4588 java_lang_boxing_object::get_value(obj, &v);
4589 return v.z;
4590 }
4591
4592 static int member_offset(int hardcoded_offset) {
4593 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4594 }
4595
4596 // Compute hard-coded offsets
4597 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4598 // are not available to determine the offset_of_static_fields.
4599 void JavaClasses::compute_hard_coded_offsets() {
4600
4601 // java_lang_boxing_object
4602 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4603 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4604
4605 // java_lang_ref_Reference
4606 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4607 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4608 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4609 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4610 }
4611
4612 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4613
4614 // Compute non-hard-coded field offsets of all the classes in this file
4615 void JavaClasses::compute_offsets() {
4616 if (UseSharedSpaces) {
4617 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4618 JvmtiExport::has_early_class_hook_env()),
4619 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4620 // None of the classes used by the rest of this function can be replaced by
4621 // JMVTI ClassFileLoadHook.
4622 // We are safe to use the archived offsets, which have already been restored
4623 // by JavaClasses::serialize_offsets, without computing the offsets again.
4624 return;
4625 }
4626
4627 // We have already called the compute_offsets() of the
4628 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4629 // earlier inside SystemDictionary::resolve_well_known_classes()
4630 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4631
4632 // generated interpreter code wants to know about the offsets we just computed:
4633 AbstractAssembler::update_delayed_values();
4634 }
4635
4636 #if INCLUDE_CDS
4637 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4638
4639 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4640 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4641 }
4642 #endif
4643
4644
4645 #ifndef PRODUCT
4646
4647 // These functions exist to assert the validity of hard-coded field offsets to guard
4648 // against changes in the class files
4649
4650 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4651 EXCEPTION_MARK;
4652 fieldDescriptor fd;
4653 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
4654 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4655 InstanceKlass* ik = InstanceKlass::cast(k);
4656 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
4657 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
4658 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4659 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4660 return false;
4661 }
4662 if (fd.is_static()) {
4663 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4664 return false;
4665 }
4666 if (fd.offset() == hardcoded_offset ) {
4667 return true;
4668 } else {
4669 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4670 klass_name, field_name, hardcoded_offset, fd.offset());
4671 return false;
4672 }
4673 }
4674
4675 // Check the hard-coded field offsets of all the classes in this file
4676
4677 void JavaClasses::check_offsets() {
4678 bool valid = true;
4679
4680 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4681 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4682
4683 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4684 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4685
4686 // Boxed primitive objects (java_lang_boxing_object)
4687
4688 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4689 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4690 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4691 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4692 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4693 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4694 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4695 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4696
4697 // java.lang.ref.Reference
4698
4699 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4700 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4701 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4702 // Fake field
4703 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4704
4705 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4706 }
4707
4708 #endif // PRODUCT
4709
4710 int InjectedField::compute_offset() {
4711 InstanceKlass* ik = InstanceKlass::cast(klass());
4712 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4713 if (!may_be_java && !fs.access_flags().is_internal()) {
4714 // Only look at injected fields
4715 continue;
4716 }
4717 if (fs.name() == name() && fs.signature() == signature()) {
4718 return fs.offset();
4719 }
4720 }
4721 ResourceMark rm;
4722 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)" : "");
4723 #ifndef PRODUCT
4724 ik->print();
4725 tty->print_cr("all fields:");
4726 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4727 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4728 }
4729 #endif //PRODUCT
4730 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4731 return -1;
4732 }
4733
4734 void javaClasses_init() {
4735 JavaClasses::compute_offsets();
4736 JavaClasses::check_offsets();
4737 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4738 }