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