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