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